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1 d86053a4 Mike Melanson
/*
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 * Copyright (C) 2003-2004 the ffmpeg project
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 *
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 */
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/**
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 * @file vp3.c
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 * On2 VP3 Video Decoder
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 *
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 * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
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 * For more information about the VP3 coding process, visit:
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 *   http://multimedia.cx/
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 *
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 * Theora decoder by Alex Beregszaszi
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#include "vp3data.h"
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#define FRAGMENT_PIXELS 8
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/*
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 * Debugging Variables
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 *
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 * Define one or more of the following compile-time variables to 1 to obtain
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 * elaborate information about certain aspects of the decoding process.
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 *
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 * KEYFRAMES_ONLY: set this to 1 to only see keyframes (VP3 slideshow mode)
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 * DEBUG_VP3: high-level decoding flow
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 * DEBUG_INIT: initialization parameters
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 * DEBUG_DEQUANTIZERS: display how the dequanization tables are built
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 * DEBUG_BLOCK_CODING: unpacking the superblock/macroblock/fragment coding
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 * DEBUG_MODES: unpacking the coding modes for individual fragments
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 * DEBUG_VECTORS: display the motion vectors
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 * DEBUG_TOKEN: display exhaustive information about each DCT token
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 * DEBUG_VLC: display the VLCs as they are extracted from the stream
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 * DEBUG_DC_PRED: display the process of reversing DC prediction
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 * DEBUG_IDCT: show every detail of the IDCT process
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 */
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#define KEYFRAMES_ONLY 0
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#define DEBUG_VP3 0
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#define DEBUG_INIT 0
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#define DEBUG_DEQUANTIZERS 0
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#define DEBUG_BLOCK_CODING 0
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#define DEBUG_MODES 0
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#define DEBUG_VECTORS 0
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#define DEBUG_TOKEN 0
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#define DEBUG_VLC 0
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#define DEBUG_DC_PRED 0
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#define DEBUG_IDCT 0
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#if DEBUG_VP3
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#define debug_vp3(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_vp3(const char *format, ...) { }
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#endif
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#if DEBUG_INIT
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#define debug_init(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_init(const char *format, ...) { }
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#endif
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#if DEBUG_DEQUANTIZERS
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#define debug_dequantizers(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_dequantizers(const char *format, ...) { }
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#endif
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#if DEBUG_BLOCK_CODING
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#define debug_block_coding(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_block_coding(const char *format, ...) { }
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#endif
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#if DEBUG_MODES
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#define debug_modes(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_modes(const char *format, ...) { }
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#endif
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#if DEBUG_VECTORS
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#define debug_vectors(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_vectors(const char *format, ...) { }
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#endif
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#if DEBUG_TOKEN
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#define debug_token(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_token(const char *format, ...) { }
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#endif
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#if DEBUG_VLC
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#define debug_vlc(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_vlc(const char *format, ...) { }
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#endif
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#if DEBUG_DC_PRED
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#define debug_dc_pred(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_dc_pred(const char *format, ...) { }
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#endif
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#if DEBUG_IDCT
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#define debug_idct(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
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#else
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static inline void debug_idct(const char *format, ...) { }
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#endif
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typedef struct Coeff {
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    struct Coeff *next;
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    DCTELEM coeff;
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    uint8_t index;
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} Coeff;
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//FIXME split things out into their own arrays
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typedef struct Vp3Fragment {
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    Coeff *next_coeff;
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    /* address of first pixel taking into account which plane the fragment
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     * lives on as well as the plane stride */
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    int first_pixel;
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    /* this is the macroblock that the fragment belongs to */
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    uint16_t macroblock;
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    uint8_t coding_method;
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    uint8_t coeff_count;
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    int8_t motion_x;
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    int8_t motion_y;
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} Vp3Fragment;
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#define SB_NOT_CODED        0
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#define SB_PARTIALLY_CODED  1
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#define SB_FULLY_CODED      2
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#define MODE_INTER_NO_MV      0
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#define MODE_INTRA            1
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#define MODE_INTER_PLUS_MV    2
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#define MODE_INTER_LAST_MV    3
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#define MODE_INTER_PRIOR_LAST 4
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#define MODE_USING_GOLDEN     5
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#define MODE_GOLDEN_MV        6
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#define MODE_INTER_FOURMV     7
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#define CODING_MODE_COUNT     8
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/* special internal mode */
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#define MODE_COPY             8
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/* There are 6 preset schemes, plus a free-form scheme */
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static int ModeAlphabet[7][CODING_MODE_COUNT] =
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{
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    /* this is the custom scheme */
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    { 0, 0, 0, 0, 0, 0, 0, 0 },
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    /* scheme 1: Last motion vector dominates */
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    {    MODE_INTER_LAST_MV,    MODE_INTER_PRIOR_LAST,
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         MODE_INTER_PLUS_MV,    MODE_INTER_NO_MV,
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         MODE_INTRA,            MODE_USING_GOLDEN,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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    /* scheme 2 */
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    {    MODE_INTER_LAST_MV,    MODE_INTER_PRIOR_LAST,
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         MODE_INTER_NO_MV,      MODE_INTER_PLUS_MV,
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         MODE_INTRA,            MODE_USING_GOLDEN,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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    /* scheme 3 */
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    {    MODE_INTER_LAST_MV,    MODE_INTER_PLUS_MV,
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         MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
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         MODE_INTRA,            MODE_USING_GOLDEN,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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    /* scheme 4 */
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    {    MODE_INTER_LAST_MV,    MODE_INTER_PLUS_MV,
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         MODE_INTER_NO_MV,      MODE_INTER_PRIOR_LAST,
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         MODE_INTRA,            MODE_USING_GOLDEN,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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    /* scheme 5: No motion vector dominates */
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    {    MODE_INTER_NO_MV,      MODE_INTER_LAST_MV,
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         MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
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         MODE_INTRA,            MODE_USING_GOLDEN,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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    /* scheme 6 */
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    {    MODE_INTER_NO_MV,      MODE_USING_GOLDEN,
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         MODE_INTER_LAST_MV,    MODE_INTER_PRIOR_LAST,
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         MODE_INTER_PLUS_MV,    MODE_INTRA,
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         MODE_GOLDEN_MV,        MODE_INTER_FOURMV },
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};
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#define MIN_DEQUANT_VAL 2
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typedef struct Vp3DecodeContext {
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    AVCodecContext *avctx;
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    int theora, theora_tables;
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    int version;
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    int width, height;
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    AVFrame golden_frame;
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    AVFrame last_frame;
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    AVFrame current_frame;
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    int keyframe;
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    DSPContext dsp;
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    int flipped_image;
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    int quality_index;
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    int last_quality_index;
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    int superblock_count;
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    int superblock_width;
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    int superblock_height;
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    int y_superblock_width;
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    int y_superblock_height;
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    int c_superblock_width;
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    int c_superblock_height;
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    int u_superblock_start;
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    int v_superblock_start;
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    unsigned char *superblock_coding;
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    int macroblock_count;
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    int macroblock_width;
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    int macroblock_height;
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    int fragment_count;
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    int fragment_width;
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    int fragment_height;
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    Vp3Fragment *all_fragments;
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    Coeff *coeffs;
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    Coeff *next_coeff;
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    int u_fragment_start;
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    int v_fragment_start;
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    ScanTable scantable;
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    /* tables */
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    uint16_t coded_dc_scale_factor[64];
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    uint32_t coded_ac_scale_factor[64];
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    uint16_t coded_intra_y_dequant[64];
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    uint16_t coded_intra_c_dequant[64];
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    uint16_t coded_inter_dequant[64];
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    /* this is a list of indices into the all_fragments array indicating
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     * which of the fragments are coded */
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    int *coded_fragment_list;
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    int coded_fragment_list_index;
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    int pixel_addresses_inited;
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    VLC dc_vlc[16];
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    VLC ac_vlc_1[16];
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    VLC ac_vlc_2[16];
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    VLC ac_vlc_3[16];
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    VLC ac_vlc_4[16];
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    VLC superblock_run_length_vlc;
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    VLC fragment_run_length_vlc;
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    VLC mode_code_vlc;
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    VLC motion_vector_vlc;
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    /* these arrays need to be on 16-byte boundaries since SSE2 operations
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     * index into them */
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    DECLARE_ALIGNED_16(int16_t, intra_y_dequant[64]);
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    DECLARE_ALIGNED_16(int16_t, intra_c_dequant[64]);
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    DECLARE_ALIGNED_16(int16_t, inter_dequant[64]);
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    /* This table contains superblock_count * 16 entries. Each set of 16
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     * numbers corresponds to the fragment indices 0..15 of the superblock.
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     * An entry will be -1 to indicate that no entry corresponds to that
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     * index. */
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    int *superblock_fragments;
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    /* This table contains superblock_count * 4 entries. Each set of 4
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     * numbers corresponds to the macroblock indices 0..3 of the superblock.
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     * An entry will be -1 to indicate that no entry corresponds to that
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     * index. */
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    int *superblock_macroblocks;
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    /* This table contains macroblock_count * 6 entries. Each set of 6
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     * numbers corresponds to the fragment indices 0..5 which comprise
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     * the macroblock (4 Y fragments and 2 C fragments). */
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    int *macroblock_fragments;
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    /* This is an array that indicates how a particular macroblock
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     * is coded. */
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    unsigned char *macroblock_coding;
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    int first_coded_y_fragment;
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    int first_coded_c_fragment;
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    int last_coded_y_fragment;
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    int last_coded_c_fragment;
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    uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
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    uint8_t qscale_table[2048]; //FIXME dynamic alloc (width+15)/16
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    /* Huffman decode */
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    int hti;
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    unsigned int hbits;
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    int entries;
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    int huff_code_size;
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    uint16_t huffman_table[80][32][2];
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    uint32_t filter_limit_values[64];
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    int bounding_values_array[256];
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} Vp3DecodeContext;
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static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb);
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/************************************************************************
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 * VP3 specific functions
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 ************************************************************************/
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/*
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 * This function sets up all of the various blocks mappings:
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 * superblocks <-> fragments, macroblocks <-> fragments,
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 * superblocks <-> macroblocks
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 *
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 * Returns 0 is successful; returns 1 if *anything* went wrong.
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 */
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static int init_block_mapping(Vp3DecodeContext *s)
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{
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    int i, j;
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    signed int hilbert_walk_y[16];
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    signed int hilbert_walk_c[16];
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    signed int hilbert_walk_mb[4];
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    int current_fragment = 0;
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    int current_width = 0;
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    int current_height = 0;
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    int right_edge = 0;
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    int bottom_edge = 0;
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    int superblock_row_inc = 0;
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    int *hilbert = NULL;
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    int mapping_index = 0;
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    int current_macroblock;
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    int c_fragment;
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    signed char travel_width[16] = {
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         1,  1,  0, -1,
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         0,  0,  1,  0,
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         1,  0,  1,  0,
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         0, -1,  0,  1
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    };
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    signed char travel_height[16] = {
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         0,  0,  1,  0,
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         1,  1,  0, -1,
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         0,  1,  0, -1,
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        -1,  0, -1,  0
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    };
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    signed char travel_width_mb[4] = {
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         1,  0,  1,  0
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    };
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    signed char travel_height_mb[4] = {
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         0,  1,  0, -1
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    };
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    debug_vp3("  vp3: initialize block mapping tables\n");
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    /* figure out hilbert pattern per these frame dimensions */
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    hilbert_walk_y[0]  = 1;
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    hilbert_walk_y[1]  = 1;
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    hilbert_walk_y[2]  = s->fragment_width;
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    hilbert_walk_y[3]  = -1;
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    hilbert_walk_y[4]  = s->fragment_width;
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    hilbert_walk_y[5]  = s->fragment_width;
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    hilbert_walk_y[6]  = 1;
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    hilbert_walk_y[7]  = -s->fragment_width;
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    hilbert_walk_y[8]  = 1;
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    hilbert_walk_y[9]  = s->fragment_width;
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    hilbert_walk_y[10]  = 1;
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    hilbert_walk_y[11] = -s->fragment_width;
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    hilbert_walk_y[12] = -s->fragment_width;
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    hilbert_walk_y[13] = -1;
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    hilbert_walk_y[14] = -s->fragment_width;
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    hilbert_walk_y[15] = 1;
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    hilbert_walk_c[0]  = 1;
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    hilbert_walk_c[1]  = 1;
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    hilbert_walk_c[2]  = s->fragment_width / 2;
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    hilbert_walk_c[3]  = -1;
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    hilbert_walk_c[4]  = s->fragment_width / 2;
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    hilbert_walk_c[5]  = s->fragment_width / 2;
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    hilbert_walk_c[6]  = 1;
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    hilbert_walk_c[7]  = -s->fragment_width / 2;
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    hilbert_walk_c[8]  = 1;
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    hilbert_walk_c[9]  = s->fragment_width / 2;
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    hilbert_walk_c[10]  = 1;
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    hilbert_walk_c[11] = -s->fragment_width / 2;
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    hilbert_walk_c[12] = -s->fragment_width / 2;
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    hilbert_walk_c[13] = -1;
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    hilbert_walk_c[14] = -s->fragment_width / 2;
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    hilbert_walk_c[15] = 1;
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    hilbert_walk_mb[0] = 1;
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    hilbert_walk_mb[1] = s->macroblock_width;
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    hilbert_walk_mb[2] = 1;
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    hilbert_walk_mb[3] = -s->macroblock_width;
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    /* iterate through each superblock (all planes) and map the fragments */
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    for (i = 0; i < s->superblock_count; i++) {
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        debug_init("    superblock %d (u starts @ %d, v starts @ %d)\n",
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            i, s->u_superblock_start, s->v_superblock_start);
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        /* time to re-assign the limits? */
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        if (i == 0) {
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            /* start of Y superblocks */
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            right_edge = s->fragment_width;
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            bottom_edge = s->fragment_height;
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            current_width = -1;
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            current_height = 0;
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            superblock_row_inc = 3 * s->fragment_width -
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                (s->y_superblock_width * 4 - s->fragment_width);
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            hilbert = hilbert_walk_y;
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            /* the first operation for this variable is to advance by 1 */
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            current_fragment = -1;
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        } else if (i == s->u_superblock_start) {
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            /* start of U superblocks */
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            right_edge = s->fragment_width / 2;
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            bottom_edge = s->fragment_height / 2;
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            current_width = -1;
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            current_height = 0;
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            superblock_row_inc = 3 * (s->fragment_width / 2) -
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                (s->c_superblock_width * 4 - s->fragment_width / 2);
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            hilbert = hilbert_walk_c;
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            /* the first operation for this variable is to advance by 1 */
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            current_fragment = s->u_fragment_start - 1;
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        } else if (i == s->v_superblock_start) {
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            /* start of V superblocks */
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            right_edge = s->fragment_width / 2;
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            bottom_edge = s->fragment_height / 2;
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            current_width = -1;
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            current_height = 0;
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            superblock_row_inc = 3 * (s->fragment_width / 2) -
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                (s->c_superblock_width * 4 - s->fragment_width / 2);
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            hilbert = hilbert_walk_c;
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            /* the first operation for this variable is to advance by 1 */
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            current_fragment = s->v_fragment_start - 1;
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        }
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        if (current_width >= right_edge - 1) {
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            /* reset width and move to next superblock row */
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            current_width = -1;
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            current_height += 4;
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            /* fragment is now at the start of a new superblock row */
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            current_fragment += superblock_row_inc;
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        }
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        /* iterate through all 16 fragments in a superblock */
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        for (j = 0; j < 16; j++) {
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            current_fragment += hilbert[j];
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            current_width += travel_width[j];
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            current_height += travel_height[j];
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492
            /* check if the fragment is in bounds */
493 892fc83e Mike Melanson
            if ((current_width < right_edge) &&
494 d86053a4 Mike Melanson
                (current_height < bottom_edge)) {
495
                s->superblock_fragments[mapping_index] = current_fragment;
496 115329f1 Diego Biurrun
                debug_init("    mapping fragment %d to superblock %d, position %d (%d/%d x %d/%d)\n",
497 892fc83e Mike Melanson
                    s->superblock_fragments[mapping_index], i, j,
498
                    current_width, right_edge, current_height, bottom_edge);
499 d86053a4 Mike Melanson
            } else {
500
                s->superblock_fragments[mapping_index] = -1;
501 115329f1 Diego Biurrun
                debug_init("    superblock %d, position %d has no fragment (%d/%d x %d/%d)\n",
502 892fc83e Mike Melanson
                    i, j,
503
                    current_width, right_edge, current_height, bottom_edge);
504 d86053a4 Mike Melanson
            }
505
506
            mapping_index++;
507
        }
508
    }
509
510
    /* initialize the superblock <-> macroblock mapping; iterate through
511
     * all of the Y plane superblocks to build this mapping */
512
    right_edge = s->macroblock_width;
513
    bottom_edge = s->macroblock_height;
514 892fc83e Mike Melanson
    current_width = -1;
515 d86053a4 Mike Melanson
    current_height = 0;
516 892fc83e Mike Melanson
    superblock_row_inc = s->macroblock_width -
517
        (s->y_superblock_width * 2 - s->macroblock_width);;
518 d86053a4 Mike Melanson
    hilbert = hilbert_walk_mb;
519
    mapping_index = 0;
520
    current_macroblock = -1;
521
    for (i = 0; i < s->u_superblock_start; i++) {
522
523 96a7e73b Mike Melanson
        if (current_width >= right_edge - 1) {
524 d86053a4 Mike Melanson
            /* reset width and move to next superblock row */
525 96a7e73b Mike Melanson
            current_width = -1;
526 d86053a4 Mike Melanson
            current_height += 2;
527
528
            /* macroblock is now at the start of a new superblock row */
529
            current_macroblock += superblock_row_inc;
530
        }
531
532
        /* iterate through each potential macroblock in the superblock */
533
        for (j = 0; j < 4; j++) {
534
            current_macroblock += hilbert_walk_mb[j];
535 892fc83e Mike Melanson
            current_width += travel_width_mb[j];
536 d86053a4 Mike Melanson
            current_height += travel_height_mb[j];
537
538
            /* check if the macroblock is in bounds */
539 892fc83e Mike Melanson
            if ((current_width < right_edge) &&
540 d86053a4 Mike Melanson
                (current_height < bottom_edge)) {
541
                s->superblock_macroblocks[mapping_index] = current_macroblock;
542 96a7e73b Mike Melanson
                debug_init("    mapping macroblock %d to superblock %d, position %d (%d/%d x %d/%d)\n",
543
                    s->superblock_macroblocks[mapping_index], i, j,
544
                    current_width, right_edge, current_height, bottom_edge);
545 d86053a4 Mike Melanson
            } else {
546
                s->superblock_macroblocks[mapping_index] = -1;
547 96a7e73b Mike Melanson
                debug_init("    superblock %d, position %d has no macroblock (%d/%d x %d/%d)\n",
548
                    i, j,
549
                    current_width, right_edge, current_height, bottom_edge);
550 d86053a4 Mike Melanson
            }
551
552
            mapping_index++;
553
        }
554
    }
555
556
    /* initialize the macroblock <-> fragment mapping */
557
    current_fragment = 0;
558
    current_macroblock = 0;
559
    mapping_index = 0;
560
    for (i = 0; i < s->fragment_height; i += 2) {
561
562
        for (j = 0; j < s->fragment_width; j += 2) {
563
564
            debug_init("    macroblock %d contains fragments: ", current_macroblock);
565
            s->all_fragments[current_fragment].macroblock = current_macroblock;
566
            s->macroblock_fragments[mapping_index++] = current_fragment;
567
            debug_init("%d ", current_fragment);
568
569
            if (j + 1 < s->fragment_width) {
570
                s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
571
                s->macroblock_fragments[mapping_index++] = current_fragment + 1;
572
                debug_init("%d ", current_fragment + 1);
573
            } else
574
                s->macroblock_fragments[mapping_index++] = -1;
575
576
            if (i + 1 < s->fragment_height) {
577 115329f1 Diego Biurrun
                s->all_fragments[current_fragment + s->fragment_width].macroblock =
578 d86053a4 Mike Melanson
                    current_macroblock;
579 115329f1 Diego Biurrun
                s->macroblock_fragments[mapping_index++] =
580 d86053a4 Mike Melanson
                    current_fragment + s->fragment_width;
581
                debug_init("%d ", current_fragment + s->fragment_width);
582
            } else
583
                s->macroblock_fragments[mapping_index++] = -1;
584
585
            if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
586 115329f1 Diego Biurrun
                s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
587 d86053a4 Mike Melanson
                    current_macroblock;
588 115329f1 Diego Biurrun
                s->macroblock_fragments[mapping_index++] =
589 d86053a4 Mike Melanson
                    current_fragment + s->fragment_width + 1;
590
                debug_init("%d ", current_fragment + s->fragment_width + 1);
591
            } else
592
                s->macroblock_fragments[mapping_index++] = -1;
593
594
            /* C planes */
595 115329f1 Diego Biurrun
            c_fragment = s->u_fragment_start +
596 d86053a4 Mike Melanson
                (i * s->fragment_width / 4) + (j / 2);
597 892fc83e Mike Melanson
            s->all_fragments[c_fragment].macroblock = s->macroblock_count;
598 d86053a4 Mike Melanson
            s->macroblock_fragments[mapping_index++] = c_fragment;
599
            debug_init("%d ", c_fragment);
600
601 115329f1 Diego Biurrun
            c_fragment = s->v_fragment_start +
602 d86053a4 Mike Melanson
                (i * s->fragment_width / 4) + (j / 2);
603 892fc83e Mike Melanson
            s->all_fragments[c_fragment].macroblock = s->macroblock_count;
604 d86053a4 Mike Melanson
            s->macroblock_fragments[mapping_index++] = c_fragment;
605
            debug_init("%d ", c_fragment);
606
607
            debug_init("\n");
608
609
            if (j + 2 <= s->fragment_width)
610
                current_fragment += 2;
611 115329f1 Diego Biurrun
            else
612 d86053a4 Mike Melanson
                current_fragment++;
613
            current_macroblock++;
614
        }
615
616
        current_fragment += s->fragment_width;
617
    }
618 892fc83e Mike Melanson
619
    return 0;  /* successful path out */
620 d86053a4 Mike Melanson
}
621
622
/*
623
 * This function wipes out all of the fragment data.
624
 */
625
static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
626
{
627
    int i;
628
629
    /* zero out all of the fragment information */
630
    s->coded_fragment_list_index = 0;
631
    for (i = 0; i < s->fragment_count; i++) {
632
        s->all_fragments[i].coeff_count = 0;
633 7dc9ed11 Mike Melanson
        s->all_fragments[i].motion_x = 127;
634
        s->all_fragments[i].motion_y = 127;
635
        s->all_fragments[i].next_coeff= NULL;
636 7beddb12 Michael Niedermayer
        s->coeffs[i].index=
637
        s->coeffs[i].coeff=0;
638
        s->coeffs[i].next= NULL;
639 d86053a4 Mike Melanson
    }
640
}
641
642
/*
643 f44b08a5 Mike Melanson
 * This function sets up the dequantization tables used for a particular
644 d86053a4 Mike Melanson
 * frame.
645
 */
646
static void init_dequantizer(Vp3DecodeContext *s)
647
{
648
649 67335dbc Mike Melanson
    int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
650 f44ee2c3 Alex Beregszaszi
    int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
651 d86053a4 Mike Melanson
    int i, j;
652
653
    debug_vp3("  vp3: initializing dequantization tables\n");
654
655 115329f1 Diego Biurrun
    /*
656 d86053a4 Mike Melanson
     * Scale dequantizers:
657
     *
658
     *   quantizer * sf
659
     *   --------------
660
     *        100
661
     *
662
     * where sf = dc_scale_factor for DC quantizer
663 67335dbc Mike Melanson
     *         or ac_scale_factor for AC quantizer
664 d86053a4 Mike Melanson
     *
665
     * Then, saturate the result to a lower limit of MIN_DEQUANT_VAL.
666
     */
667 3d32b429 Mike Melanson
#define SCALER 4
668 d86053a4 Mike Melanson
669
    /* scale DC quantizers */
670 f44ee2c3 Alex Beregszaszi
    s->intra_y_dequant[0] = s->coded_intra_y_dequant[0] * dc_scale_factor / 100;
671 d86053a4 Mike Melanson
    if (s->intra_y_dequant[0] < MIN_DEQUANT_VAL * 2)
672
        s->intra_y_dequant[0] = MIN_DEQUANT_VAL * 2;
673
    s->intra_y_dequant[0] *= SCALER;
674
675 f44ee2c3 Alex Beregszaszi
    s->intra_c_dequant[0] = s->coded_intra_c_dequant[0] * dc_scale_factor / 100;
676 d86053a4 Mike Melanson
    if (s->intra_c_dequant[0] < MIN_DEQUANT_VAL * 2)
677
        s->intra_c_dequant[0] = MIN_DEQUANT_VAL * 2;
678
    s->intra_c_dequant[0] *= SCALER;
679
680 f44ee2c3 Alex Beregszaszi
    s->inter_dequant[0] = s->coded_inter_dequant[0] * dc_scale_factor / 100;
681 d86053a4 Mike Melanson
    if (s->inter_dequant[0] < MIN_DEQUANT_VAL * 4)
682
        s->inter_dequant[0] = MIN_DEQUANT_VAL * 4;
683
    s->inter_dequant[0] *= SCALER;
684
685
    /* scale AC quantizers, zigzag at the same time in preparation for
686
     * the dequantization phase */
687
    for (i = 1; i < 64; i++) {
688 36af0c95 Michael Niedermayer
        int k= s->scantable.scantable[i];
689
        j = s->scantable.permutated[i];
690 d86053a4 Mike Melanson
691 36af0c95 Michael Niedermayer
        s->intra_y_dequant[j] = s->coded_intra_y_dequant[k] * ac_scale_factor / 100;
692 d86053a4 Mike Melanson
        if (s->intra_y_dequant[j] < MIN_DEQUANT_VAL)
693
            s->intra_y_dequant[j] = MIN_DEQUANT_VAL;
694
        s->intra_y_dequant[j] *= SCALER;
695
696 36af0c95 Michael Niedermayer
        s->intra_c_dequant[j] = s->coded_intra_c_dequant[k] * ac_scale_factor / 100;
697 d86053a4 Mike Melanson
        if (s->intra_c_dequant[j] < MIN_DEQUANT_VAL)
698
            s->intra_c_dequant[j] = MIN_DEQUANT_VAL;
699
        s->intra_c_dequant[j] *= SCALER;
700
701 36af0c95 Michael Niedermayer
        s->inter_dequant[j] = s->coded_inter_dequant[k] * ac_scale_factor / 100;
702 d86053a4 Mike Melanson
        if (s->inter_dequant[j] < MIN_DEQUANT_VAL * 2)
703
            s->inter_dequant[j] = MIN_DEQUANT_VAL * 2;
704
        s->inter_dequant[j] *= SCALER;
705
    }
706 115329f1 Diego Biurrun
707 b928ec64 Michael Niedermayer
    memset(s->qscale_table, (FFMAX(s->intra_y_dequant[1], s->intra_c_dequant[1])+8)/16, 512); //FIXME finetune
708 d86053a4 Mike Melanson
709
    /* print debug information as requested */
710
    debug_dequantizers("intra Y dequantizers:\n");
711
    for (i = 0; i < 8; i++) {
712
      for (j = i * 8; j < i * 8 + 8; j++) {
713
        debug_dequantizers(" %4d,", s->intra_y_dequant[j]);
714
      }
715
      debug_dequantizers("\n");
716
    }
717
    debug_dequantizers("\n");
718
719
    debug_dequantizers("intra C dequantizers:\n");
720
    for (i = 0; i < 8; i++) {
721
      for (j = i * 8; j < i * 8 + 8; j++) {
722
        debug_dequantizers(" %4d,", s->intra_c_dequant[j]);
723
      }
724
      debug_dequantizers("\n");
725
    }
726
    debug_dequantizers("\n");
727
728
    debug_dequantizers("interframe dequantizers:\n");
729
    for (i = 0; i < 8; i++) {
730
      for (j = i * 8; j < i * 8 + 8; j++) {
731
        debug_dequantizers(" %4d,", s->inter_dequant[j]);
732
      }
733
      debug_dequantizers("\n");
734
    }
735
    debug_dequantizers("\n");
736
}
737
738
/*
739 f44b08a5 Mike Melanson
 * This function initializes the loop filter boundary limits if the frame's
740
 * quality index is different from the previous frame's.
741
 */
742
static void init_loop_filter(Vp3DecodeContext *s)
743
{
744
    int *bounding_values= s->bounding_values_array+127;
745
    int filter_limit;
746
    int x;
747
748
    filter_limit = s->filter_limit_values[s->quality_index];
749
750
    /* set up the bounding values */
751
    memset(s->bounding_values_array, 0, 256 * sizeof(int));
752
    for (x = 0; x < filter_limit; x++) {
753
        bounding_values[-x - filter_limit] = -filter_limit + x;
754
        bounding_values[-x] = -x;
755
        bounding_values[x] = x;
756
        bounding_values[x + filter_limit] = filter_limit - x;
757
    }
758
}
759
760
/*
761 115329f1 Diego Biurrun
 * This function unpacks all of the superblock/macroblock/fragment coding
762 d86053a4 Mike Melanson
 * information from the bitstream.
763
 */
764 892fc83e Mike Melanson
static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
765 d86053a4 Mike Melanson
{
766
    int bit = 0;
767
    int current_superblock = 0;
768
    int current_run = 0;
769
    int decode_fully_flags = 0;
770
    int decode_partial_blocks = 0;
771 22493ab9 Mike Melanson
    int first_c_fragment_seen;
772 d86053a4 Mike Melanson
773
    int i, j;
774
    int current_fragment;
775
776
    debug_vp3("  vp3: unpacking superblock coding\n");
777
778
    if (s->keyframe) {
779
780
        debug_vp3("    keyframe-- all superblocks are fully coded\n");
781
        memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
782
783
    } else {
784
785
        /* unpack the list of partially-coded superblocks */
786
        bit = get_bits(gb, 1);
787 115329f1 Diego Biurrun
        /* toggle the bit because as soon as the first run length is
788 d86053a4 Mike Melanson
         * fetched the bit will be toggled again */
789
        bit ^= 1;
790
        while (current_superblock < s->superblock_count) {
791 b5da3635 Michael Niedermayer
            if (current_run-- == 0) {
792 d86053a4 Mike Melanson
                bit ^= 1;
793 115329f1 Diego Biurrun
                current_run = get_vlc2(gb,
794 b5da3635 Michael Niedermayer
                    s->superblock_run_length_vlc.table, 6, 2);
795
                if (current_run == 33)
796 d8278bab Mike Melanson
                    current_run += get_bits(gb, 12);
797 d86053a4 Mike Melanson
                debug_block_coding("      setting superblocks %d..%d to %s\n",
798
                    current_superblock,
799
                    current_superblock + current_run - 1,
800
                    (bit) ? "partially coded" : "not coded");
801
802
                /* if any of the superblocks are not partially coded, flag
803
                 * a boolean to decode the list of fully-coded superblocks */
804 642d7e84 Mike Melanson
                if (bit == 0) {
805 d86053a4 Mike Melanson
                    decode_fully_flags = 1;
806 642d7e84 Mike Melanson
                } else {
807 d86053a4 Mike Melanson
808 642d7e84 Mike Melanson
                    /* make a note of the fact that there are partially coded
809
                     * superblocks */
810
                    decode_partial_blocks = 1;
811
                }
812 d86053a4 Mike Melanson
            }
813 b5da3635 Michael Niedermayer
            s->superblock_coding[current_superblock++] = bit;
814 d86053a4 Mike Melanson
        }
815
816
        /* unpack the list of fully coded superblocks if any of the blocks were
817
         * not marked as partially coded in the previous step */
818
        if (decode_fully_flags) {
819
820
            current_superblock = 0;
821
            current_run = 0;
822
            bit = get_bits(gb, 1);
823 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
824 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
825
            bit ^= 1;
826
            while (current_superblock < s->superblock_count) {
827
828
                /* skip any superblocks already marked as partially coded */
829
                if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
830
831 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
832 d86053a4 Mike Melanson
                        bit ^= 1;
833 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
834 b5da3635 Michael Niedermayer
                            s->superblock_run_length_vlc.table, 6, 2);
835
                        if (current_run == 33)
836 d8278bab Mike Melanson
                            current_run += get_bits(gb, 12);
837 d86053a4 Mike Melanson
                    }
838
839
                    debug_block_coding("      setting superblock %d to %s\n",
840
                        current_superblock,
841
                        (bit) ? "fully coded" : "not coded");
842 b5da3635 Michael Niedermayer
                    s->superblock_coding[current_superblock] = 2*bit;
843 d86053a4 Mike Melanson
                }
844
                current_superblock++;
845
            }
846
        }
847
848
        /* if there were partial blocks, initialize bitstream for
849
         * unpacking fragment codings */
850
        if (decode_partial_blocks) {
851
852
            current_run = 0;
853
            bit = get_bits(gb, 1);
854 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
855 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
856
            bit ^= 1;
857
        }
858
    }
859
860
    /* figure out which fragments are coded; iterate through each
861
     * superblock (all planes) */
862
    s->coded_fragment_list_index = 0;
863 7beddb12 Michael Niedermayer
    s->next_coeff= s->coeffs + s->fragment_count;
864 04331882 Mike Melanson
    s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
865
    s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
866 22493ab9 Mike Melanson
    first_c_fragment_seen = 0;
867 96a7e73b Mike Melanson
    memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
868 d86053a4 Mike Melanson
    for (i = 0; i < s->superblock_count; i++) {
869
870
        /* iterate through all 16 fragments in a superblock */
871
        for (j = 0; j < 16; j++) {
872
873
            /* if the fragment is in bounds, check its coding status */
874
            current_fragment = s->superblock_fragments[i * 16 + j];
875 892fc83e Mike Melanson
            if (current_fragment >= s->fragment_count) {
876 9b879566 Michel Bardiaux
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
877 892fc83e Mike Melanson
                    current_fragment, s->fragment_count);
878
                return 1;
879
            }
880 d86053a4 Mike Melanson
            if (current_fragment != -1) {
881
                if (s->superblock_coding[i] == SB_NOT_CODED) {
882
883
                    /* copy all the fragments from the prior frame */
884 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
885 d86053a4 Mike Melanson
                        MODE_COPY;
886
887
                } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
888
889
                    /* fragment may or may not be coded; this is the case
890
                     * that cares about the fragment coding runs */
891 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
892 d86053a4 Mike Melanson
                        bit ^= 1;
893 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
894 b5da3635 Michael Niedermayer
                            s->fragment_run_length_vlc.table, 5, 2);
895 d86053a4 Mike Melanson
                    }
896
897
                    if (bit) {
898 115329f1 Diego Biurrun
                        /* default mode; actual mode will be decoded in
899 22493ab9 Mike Melanson
                         * the next phase */
900 115329f1 Diego Biurrun
                        s->all_fragments[current_fragment].coding_method =
901 d86053a4 Mike Melanson
                            MODE_INTER_NO_MV;
902 7beddb12 Michael Niedermayer
                        s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
903 115329f1 Diego Biurrun
                        s->coded_fragment_list[s->coded_fragment_list_index] =
904 d86053a4 Mike Melanson
                            current_fragment;
905 04331882 Mike Melanson
                        if ((current_fragment >= s->u_fragment_start) &&
906 22493ab9 Mike Melanson
                            (s->last_coded_y_fragment == -1) &&
907
                            (!first_c_fragment_seen)) {
908 04331882 Mike Melanson
                            s->first_coded_c_fragment = s->coded_fragment_list_index;
909
                            s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
910 22493ab9 Mike Melanson
                            first_c_fragment_seen = 1;
911 04331882 Mike Melanson
                        }
912
                        s->coded_fragment_list_index++;
913 96a7e73b Mike Melanson
                        s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
914 d86053a4 Mike Melanson
                        debug_block_coding("      superblock %d is partially coded, fragment %d is coded\n",
915
                            i, current_fragment);
916
                    } else {
917
                        /* not coded; copy this fragment from the prior frame */
918
                        s->all_fragments[current_fragment].coding_method =
919
                            MODE_COPY;
920
                        debug_block_coding("      superblock %d is partially coded, fragment %d is not coded\n",
921
                            i, current_fragment);
922
                    }
923
924
                } else {
925
926
                    /* fragments are fully coded in this superblock; actual
927
                     * coding will be determined in next step */
928 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
929 d86053a4 Mike Melanson
                        MODE_INTER_NO_MV;
930 7beddb12 Michael Niedermayer
                    s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
931 115329f1 Diego Biurrun
                    s->coded_fragment_list[s->coded_fragment_list_index] =
932 d86053a4 Mike Melanson
                        current_fragment;
933 04331882 Mike Melanson
                    if ((current_fragment >= s->u_fragment_start) &&
934 22493ab9 Mike Melanson
                        (s->last_coded_y_fragment == -1) &&
935
                        (!first_c_fragment_seen)) {
936 04331882 Mike Melanson
                        s->first_coded_c_fragment = s->coded_fragment_list_index;
937
                        s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
938 22493ab9 Mike Melanson
                        first_c_fragment_seen = 1;
939 04331882 Mike Melanson
                    }
940
                    s->coded_fragment_list_index++;
941 96a7e73b Mike Melanson
                    s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
942 d86053a4 Mike Melanson
                    debug_block_coding("      superblock %d is fully coded, fragment %d is coded\n",
943
                        i, current_fragment);
944
                }
945
            }
946
        }
947
    }
948 04331882 Mike Melanson
949 22493ab9 Mike Melanson
    if (!first_c_fragment_seen)
950
        /* only Y fragments coded in this frame */
951 04331882 Mike Melanson
        s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
952 115329f1 Diego Biurrun
    else
953 642d7e84 Mike Melanson
        /* end the list of coded C fragments */
954 04331882 Mike Melanson
        s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
955 22493ab9 Mike Melanson
956 04331882 Mike Melanson
    debug_block_coding("    %d total coded fragments, y: %d -> %d, c: %d -> %d\n",
957
        s->coded_fragment_list_index,
958
        s->first_coded_y_fragment,
959
        s->last_coded_y_fragment,
960
        s->first_coded_c_fragment,
961
        s->last_coded_c_fragment);
962 892fc83e Mike Melanson
963
    return 0;
964 d86053a4 Mike Melanson
}
965
966
/*
967
 * This function unpacks all the coding mode data for individual macroblocks
968
 * from the bitstream.
969
 */
970 892fc83e Mike Melanson
static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
971 d86053a4 Mike Melanson
{
972
    int i, j, k;
973
    int scheme;
974
    int current_macroblock;
975
    int current_fragment;
976
    int coding_mode;
977
978
    debug_vp3("  vp3: unpacking encoding modes\n");
979
980
    if (s->keyframe) {
981
        debug_vp3("    keyframe-- all blocks are coded as INTRA\n");
982
983
        for (i = 0; i < s->fragment_count; i++)
984
            s->all_fragments[i].coding_method = MODE_INTRA;
985
986
    } else {
987
988
        /* fetch the mode coding scheme for this frame */
989
        scheme = get_bits(gb, 3);
990
        debug_modes("    using mode alphabet %d\n", scheme);
991
992
        /* is it a custom coding scheme? */
993
        if (scheme == 0) {
994
            debug_modes("    custom mode alphabet ahead:\n");
995
            for (i = 0; i < 8; i++)
996 a466e345 Mike Melanson
                ModeAlphabet[scheme][get_bits(gb, 3)] = i;
997 d86053a4 Mike Melanson
        }
998
999
        for (i = 0; i < 8; i++)
1000 115329f1 Diego Biurrun
            debug_modes("      mode[%d][%d] = %d\n", scheme, i,
1001 d86053a4 Mike Melanson
                ModeAlphabet[scheme][i]);
1002
1003
        /* iterate through all of the macroblocks that contain 1 or more
1004
         * coded fragments */
1005
        for (i = 0; i < s->u_superblock_start; i++) {
1006
1007
            for (j = 0; j < 4; j++) {
1008
                current_macroblock = s->superblock_macroblocks[i * 4 + j];
1009
                if ((current_macroblock == -1) ||
1010 96a7e73b Mike Melanson
                    (s->macroblock_coding[current_macroblock] == MODE_COPY))
1011 d86053a4 Mike Melanson
                    continue;
1012 892fc83e Mike Melanson
                if (current_macroblock >= s->macroblock_count) {
1013 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
1014 892fc83e Mike Melanson
                        current_macroblock, s->macroblock_count);
1015
                    return 1;
1016
                }
1017 d86053a4 Mike Melanson
1018
                /* mode 7 means get 3 bits for each coding mode */
1019
                if (scheme == 7)
1020
                    coding_mode = get_bits(gb, 3);
1021
                else
1022 0ad72bdd Mike Melanson
                    coding_mode = ModeAlphabet[scheme]
1023
                        [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
1024 d86053a4 Mike Melanson
1025 96a7e73b Mike Melanson
                s->macroblock_coding[current_macroblock] = coding_mode;
1026 d86053a4 Mike Melanson
                for (k = 0; k < 6; k++) {
1027 115329f1 Diego Biurrun
                    current_fragment =
1028 d86053a4 Mike Melanson
                        s->macroblock_fragments[current_macroblock * 6 + k];
1029 892fc83e Mike Melanson
                    if (current_fragment == -1)
1030
                        continue;
1031
                    if (current_fragment >= s->fragment_count) {
1032 9b879566 Michel Bardiaux
                        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
1033 892fc83e Mike Melanson
                            current_fragment, s->fragment_count);
1034
                        return 1;
1035
                    }
1036 115329f1 Diego Biurrun
                    if (s->all_fragments[current_fragment].coding_method !=
1037 d86053a4 Mike Melanson
                        MODE_COPY)
1038
                        s->all_fragments[current_fragment].coding_method =
1039
                            coding_mode;
1040
                }
1041
1042
                debug_modes("    coding method for macroblock starting @ fragment %d = %d\n",
1043
                    s->macroblock_fragments[current_macroblock * 6], coding_mode);
1044
            }
1045
        }
1046
    }
1047 892fc83e Mike Melanson
1048
    return 0;
1049 44ae98dd Mike Melanson
}
1050
1051
/*
1052 d86053a4 Mike Melanson
 * This function unpacks all the motion vectors for the individual
1053
 * macroblocks from the bitstream.
1054
 */
1055 892fc83e Mike Melanson
static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
1056 d86053a4 Mike Melanson
{
1057
    int i, j, k;
1058
    int coding_mode;
1059
    int motion_x[6];
1060
    int motion_y[6];
1061
    int last_motion_x = 0;
1062
    int last_motion_y = 0;
1063
    int prior_last_motion_x = 0;
1064
    int prior_last_motion_y = 0;
1065
    int current_macroblock;
1066
    int current_fragment;
1067
1068
    debug_vp3("  vp3: unpacking motion vectors\n");
1069
    if (s->keyframe) {
1070
1071
        debug_vp3("    keyframe-- there are no motion vectors\n");
1072
1073
    } else {
1074
1075
        memset(motion_x, 0, 6 * sizeof(int));
1076
        memset(motion_y, 0, 6 * sizeof(int));
1077
1078
        /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
1079
        coding_mode = get_bits(gb, 1);
1080
        debug_vectors("    using %s scheme for unpacking motion vectors\n",
1081
            (coding_mode == 0) ? "VLC" : "fixed-length");
1082
1083
        /* iterate through all of the macroblocks that contain 1 or more
1084
         * coded fragments */
1085
        for (i = 0; i < s->u_superblock_start; i++) {
1086
1087
            for (j = 0; j < 4; j++) {
1088
                current_macroblock = s->superblock_macroblocks[i * 4 + j];
1089
                if ((current_macroblock == -1) ||
1090 96a7e73b Mike Melanson
                    (s->macroblock_coding[current_macroblock] == MODE_COPY))
1091 d86053a4 Mike Melanson
                    continue;
1092 892fc83e Mike Melanson
                if (current_macroblock >= s->macroblock_count) {
1093 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
1094 892fc83e Mike Melanson
                        current_macroblock, s->macroblock_count);
1095
                    return 1;
1096
                }
1097 d86053a4 Mike Melanson
1098
                current_fragment = s->macroblock_fragments[current_macroblock * 6];
1099 892fc83e Mike Melanson
                if (current_fragment >= s->fragment_count) {
1100 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
1101 892fc83e Mike Melanson
                        current_fragment, s->fragment_count);
1102
                    return 1;
1103
                }
1104 96a7e73b Mike Melanson
                switch (s->macroblock_coding[current_macroblock]) {
1105 d86053a4 Mike Melanson
1106
                case MODE_INTER_PLUS_MV:
1107
                case MODE_GOLDEN_MV:
1108
                    /* all 6 fragments use the same motion vector */
1109
                    if (coding_mode == 0) {
1110 0ad72bdd Mike Melanson
                        motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1111
                        motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1112 d86053a4 Mike Melanson
                    } else {
1113 7f9926a4 Mike Melanson
                        motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
1114
                        motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
1115 d86053a4 Mike Melanson
                    }
1116 7f9926a4 Mike Melanson
1117 d86053a4 Mike Melanson
                    for (k = 1; k < 6; k++) {
1118
                        motion_x[k] = motion_x[0];
1119
                        motion_y[k] = motion_y[0];
1120
                    }
1121
1122
                    /* vector maintenance, only on MODE_INTER_PLUS_MV */
1123 642d7e84 Mike Melanson
                    if (s->macroblock_coding[current_macroblock] ==
1124 d86053a4 Mike Melanson
                        MODE_INTER_PLUS_MV) {
1125
                        prior_last_motion_x = last_motion_x;
1126
                        prior_last_motion_y = last_motion_y;
1127
                        last_motion_x = motion_x[0];
1128
                        last_motion_y = motion_y[0];
1129
                    }
1130
                    break;
1131
1132
                case MODE_INTER_FOURMV:
1133
                    /* fetch 4 vectors from the bitstream, one for each
1134
                     * Y fragment, then average for the C fragment vectors */
1135
                    motion_x[4] = motion_y[4] = 0;
1136
                    for (k = 0; k < 4; k++) {
1137
                        if (coding_mode == 0) {
1138 f4daf33e Mike Melanson
                            motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1139
                            motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
1140 d86053a4 Mike Melanson
                        } else {
1141 7f9926a4 Mike Melanson
                            motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
1142
                            motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
1143 d86053a4 Mike Melanson
                        }
1144
                        motion_x[4] += motion_x[k];
1145
                        motion_y[4] += motion_y[k];
1146
                    }
1147
1148 115329f1 Diego Biurrun
                    if (motion_x[4] >= 0)
1149 d86053a4 Mike Melanson
                        motion_x[4] = (motion_x[4] + 2) / 4;
1150
                    else
1151
                        motion_x[4] = (motion_x[4] - 2) / 4;
1152
                    motion_x[5] = motion_x[4];
1153
1154 115329f1 Diego Biurrun
                    if (motion_y[4] >= 0)
1155 d86053a4 Mike Melanson
                        motion_y[4] = (motion_y[4] + 2) / 4;
1156
                    else
1157
                        motion_y[4] = (motion_y[4] - 2) / 4;
1158
                    motion_y[5] = motion_y[4];
1159
1160
                    /* vector maintenance; vector[3] is treated as the
1161
                     * last vector in this case */
1162
                    prior_last_motion_x = last_motion_x;
1163
                    prior_last_motion_y = last_motion_y;
1164
                    last_motion_x = motion_x[3];
1165
                    last_motion_y = motion_y[3];
1166
                    break;
1167
1168
                case MODE_INTER_LAST_MV:
1169
                    /* all 6 fragments use the last motion vector */
1170
                    motion_x[0] = last_motion_x;
1171
                    motion_y[0] = last_motion_y;
1172
                    for (k = 1; k < 6; k++) {
1173
                        motion_x[k] = motion_x[0];
1174
                        motion_y[k] = motion_y[0];
1175
                    }
1176
1177
                    /* no vector maintenance (last vector remains the
1178
                     * last vector) */
1179
                    break;
1180
1181
                case MODE_INTER_PRIOR_LAST:
1182
                    /* all 6 fragments use the motion vector prior to the
1183
                     * last motion vector */
1184
                    motion_x[0] = prior_last_motion_x;
1185
                    motion_y[0] = prior_last_motion_y;
1186
                    for (k = 1; k < 6; k++) {
1187
                        motion_x[k] = motion_x[0];
1188
                        motion_y[k] = motion_y[0];
1189
                    }
1190
1191
                    /* vector maintenance */
1192
                    prior_last_motion_x = last_motion_x;
1193
                    prior_last_motion_y = last_motion_y;
1194
                    last_motion_x = motion_x[0];
1195
                    last_motion_y = motion_y[0];
1196
                    break;
1197 44ae98dd Mike Melanson
1198
                default:
1199
                    /* covers intra, inter without MV, golden without MV */
1200
                    memset(motion_x, 0, 6 * sizeof(int));
1201
                    memset(motion_y, 0, 6 * sizeof(int));
1202
1203
                    /* no vector maintenance */
1204
                    break;
1205 d86053a4 Mike Melanson
                }
1206
1207
                /* assign the motion vectors to the correct fragments */
1208
                debug_vectors("    vectors for macroblock starting @ fragment %d (coding method %d):\n",
1209
                    current_fragment,
1210 642d7e84 Mike Melanson
                    s->macroblock_coding[current_macroblock]);
1211 d86053a4 Mike Melanson
                for (k = 0; k < 6; k++) {
1212 115329f1 Diego Biurrun
                    current_fragment =
1213 d86053a4 Mike Melanson
                        s->macroblock_fragments[current_macroblock * 6 + k];
1214 892fc83e Mike Melanson
                    if (current_fragment == -1)
1215
                        continue;
1216
                    if (current_fragment >= s->fragment_count) {
1217 9b879566 Michel Bardiaux
                        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
1218 892fc83e Mike Melanson
                            current_fragment, s->fragment_count);
1219
                        return 1;
1220
                    }
1221 d86053a4 Mike Melanson
                    s->all_fragments[current_fragment].motion_x = motion_x[k];
1222 44ae98dd Mike Melanson
                    s->all_fragments[current_fragment].motion_y = motion_y[k];
1223 642d7e84 Mike Melanson
                    debug_vectors("    vector %d: fragment %d = (%d, %d)\n",
1224
                        k, current_fragment, motion_x[k], motion_y[k]);
1225 d86053a4 Mike Melanson
                }
1226
            }
1227
        }
1228
    }
1229 892fc83e Mike Melanson
1230
    return 0;
1231 d86053a4 Mike Melanson
}
1232
1233 115329f1 Diego Biurrun
/*
1234 d86053a4 Mike Melanson
 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1235
 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1236
 * data. This function unpacks all the VLCs for either the Y plane or both
1237
 * C planes, and is called for DC coefficients or different AC coefficient
1238
 * levels (since different coefficient types require different VLC tables.
1239
 *
1240
 * This function returns a residual eob run. E.g, if a particular token gave
1241
 * instructions to EOB the next 5 fragments and there were only 2 fragments
1242
 * left in the current fragment range, 3 would be returned so that it could
1243
 * be passed into the next call to this same function.
1244
 */
1245
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1246
                        VLC *table, int coeff_index,
1247
                        int first_fragment, int last_fragment,
1248
                        int eob_run)
1249
{
1250
    int i;
1251
    int token;
1252 d3076955 Mike Melanson
    int zero_run = 0;
1253
    DCTELEM coeff = 0;
1254 d86053a4 Mike Melanson
    Vp3Fragment *fragment;
1255 36af0c95 Michael Niedermayer
    uint8_t *perm= s->scantable.permutated;
1256 d3076955 Mike Melanson
    int bits_to_get;
1257 d86053a4 Mike Melanson
1258 22493ab9 Mike Melanson
    if ((first_fragment >= s->fragment_count) ||
1259 74c0ac12 Mike Melanson
        (last_fragment >= s->fragment_count)) {
1260
1261 9b879566 Michel Bardiaux
        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vlcs(): bad fragment number (%d -> %d ?)\n",
1262 74c0ac12 Mike Melanson
            first_fragment, last_fragment);
1263 22493ab9 Mike Melanson
        return 0;
1264 74c0ac12 Mike Melanson
    }
1265
1266 04331882 Mike Melanson
    for (i = first_fragment; i <= last_fragment; i++) {
1267 d86053a4 Mike Melanson
1268
        fragment = &s->all_fragments[s->coded_fragment_list[i]];
1269
        if (fragment->coeff_count > coeff_index)
1270
            continue;
1271
1272
        if (!eob_run) {
1273
            /* decode a VLC into a token */
1274
            token = get_vlc2(gb, table->table, 5, 3);
1275
            debug_vlc(" token = %2d, ", token);
1276
            /* use the token to get a zero run, a coefficient, and an eob run */
1277 d3076955 Mike Melanson
            if (token <= 6) {
1278
                eob_run = eob_run_base[token];
1279
                if (eob_run_get_bits[token])
1280
                    eob_run += get_bits(gb, eob_run_get_bits[token]);
1281
                coeff = zero_run = 0;
1282
            } else {
1283
                bits_to_get = coeff_get_bits[token];
1284
                if (!bits_to_get)
1285
                    coeff = coeff_tables[token][0];
1286
                else
1287
                    coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
1288
1289
                zero_run = zero_run_base[token];
1290
                if (zero_run_get_bits[token])
1291
                    zero_run += get_bits(gb, zero_run_get_bits[token]);
1292
            }
1293 d86053a4 Mike Melanson
        }
1294
1295
        if (!eob_run) {
1296
            fragment->coeff_count += zero_run;
1297 7beddb12 Michael Niedermayer
            if (fragment->coeff_count < 64){
1298
                fragment->next_coeff->coeff= coeff;
1299
                fragment->next_coeff->index= perm[fragment->coeff_count++]; //FIXME perm here already?
1300
                fragment->next_coeff->next= s->next_coeff;
1301
                s->next_coeff->next=NULL;
1302
                fragment->next_coeff= s->next_coeff++;
1303
            }
1304 d86053a4 Mike Melanson
            debug_vlc(" fragment %d coeff = %d\n",
1305 7beddb12 Michael Niedermayer
                s->coded_fragment_list[i], fragment->next_coeff[coeff_index]);
1306 d86053a4 Mike Melanson
        } else {
1307 7beddb12 Michael Niedermayer
            fragment->coeff_count |= 128;
1308 115329f1 Diego Biurrun
            debug_vlc(" fragment %d eob with %d coefficients\n",
1309 7beddb12 Michael Niedermayer
                s->coded_fragment_list[i], fragment->coeff_count&127);
1310 d86053a4 Mike Melanson
            eob_run--;
1311
        }
1312
    }
1313
1314
    return eob_run;
1315
}
1316
1317
/*
1318
 * This function unpacks all of the DCT coefficient data from the
1319
 * bitstream.
1320
 */
1321 892fc83e Mike Melanson
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1322 d86053a4 Mike Melanson
{
1323
    int i;
1324
    int dc_y_table;
1325
    int dc_c_table;
1326
    int ac_y_table;
1327
    int ac_c_table;
1328
    int residual_eob_run = 0;
1329
1330
    /* fetch the DC table indices */
1331
    dc_y_table = get_bits(gb, 4);
1332
    dc_c_table = get_bits(gb, 4);
1333
1334
    /* unpack the Y plane DC coefficients */
1335
    debug_vp3("  vp3: unpacking Y plane DC coefficients using table %d\n",
1336
        dc_y_table);
1337 115329f1 Diego Biurrun
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1338 04331882 Mike Melanson
        s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1339 d86053a4 Mike Melanson
1340
    /* unpack the C plane DC coefficients */
1341
    debug_vp3("  vp3: unpacking C plane DC coefficients using table %d\n",
1342
        dc_c_table);
1343
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1344 04331882 Mike Melanson
        s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1345 d86053a4 Mike Melanson
1346 a466e345 Mike Melanson
    /* fetch the AC table indices */
1347 d86053a4 Mike Melanson
    ac_y_table = get_bits(gb, 4);
1348
    ac_c_table = get_bits(gb, 4);
1349
1350 a466e345 Mike Melanson
    /* unpack the group 1 AC coefficients (coeffs 1-5) */
1351 d86053a4 Mike Melanson
    for (i = 1; i <= 5; i++) {
1352
1353
        debug_vp3("  vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1354
            i, ac_y_table);
1355 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_y_table], i,
1356 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1357 d86053a4 Mike Melanson
1358
        debug_vp3("  vp3: unpacking level %d C plane AC coefficients using table %d\n",
1359
            i, ac_c_table);
1360 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_c_table], i,
1361 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1362 d86053a4 Mike Melanson
    }
1363
1364 a466e345 Mike Melanson
    /* unpack the group 2 AC coefficients (coeffs 6-14) */
1365 d86053a4 Mike Melanson
    for (i = 6; i <= 14; i++) {
1366
1367
        debug_vp3("  vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1368
            i, ac_y_table);
1369 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_y_table], i,
1370 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1371 d86053a4 Mike Melanson
1372
        debug_vp3("  vp3: unpacking level %d C plane AC coefficients using table %d\n",
1373
            i, ac_c_table);
1374 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_c_table], i,
1375 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1376 d86053a4 Mike Melanson
    }
1377
1378 a466e345 Mike Melanson
    /* unpack the group 3 AC coefficients (coeffs 15-27) */
1379 d86053a4 Mike Melanson
    for (i = 15; i <= 27; i++) {
1380
1381
        debug_vp3("  vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1382
            i, ac_y_table);
1383 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_y_table], i,
1384 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1385 d86053a4 Mike Melanson
1386
        debug_vp3("  vp3: unpacking level %d C plane AC coefficients using table %d\n",
1387
            i, ac_c_table);
1388 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_c_table], i,
1389 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1390 d86053a4 Mike Melanson
    }
1391
1392 a466e345 Mike Melanson
    /* unpack the group 4 AC coefficients (coeffs 28-63) */
1393 d86053a4 Mike Melanson
    for (i = 28; i <= 63; i++) {
1394
1395
        debug_vp3("  vp3: unpacking level %d Y plane AC coefficients using table %d\n",
1396
            i, ac_y_table);
1397 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_y_table], i,
1398 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1399 d86053a4 Mike Melanson
1400
        debug_vp3("  vp3: unpacking level %d C plane AC coefficients using table %d\n",
1401
            i, ac_c_table);
1402 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_c_table], i,
1403 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1404 d86053a4 Mike Melanson
    }
1405 892fc83e Mike Melanson
1406
    return 0;
1407 d86053a4 Mike Melanson
}
1408
1409
/*
1410
 * This function reverses the DC prediction for each coded fragment in
1411 115329f1 Diego Biurrun
 * the frame. Much of this function is adapted directly from the original
1412 d86053a4 Mike Melanson
 * VP3 source code.
1413
 */
1414
#define COMPATIBLE_FRAME(x) \
1415
  (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1416
#define FRAME_CODED(x) (s->all_fragments[x].coding_method != MODE_COPY)
1417 7beddb12 Michael Niedermayer
#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
1418 d86053a4 Mike Melanson
static inline int iabs (int x) { return ((x < 0) ? -x : x); }
1419
1420
static void reverse_dc_prediction(Vp3DecodeContext *s,
1421
                                  int first_fragment,
1422
                                  int fragment_width,
1423 115329f1 Diego Biurrun
                                  int fragment_height)
1424 d86053a4 Mike Melanson
{
1425
1426
#define PUL 8
1427
#define PU 4
1428
#define PUR 2
1429
#define PL 1
1430
1431
    int x, y;
1432
    int i = first_fragment;
1433
1434
    /*
1435
     * Fragment prediction groups:
1436
     *
1437
     * 32222222226
1438
     * 10000000004
1439
     * 10000000004
1440
     * 10000000004
1441
     * 10000000004
1442
     *
1443 115329f1 Diego Biurrun
     * Note: Groups 5 and 7 do not exist as it would mean that the
1444 d86053a4 Mike Melanson
     * fragment's x coordinate is both 0 and (width - 1) at the same time.
1445
     */
1446
    int predictor_group;
1447
    short predicted_dc;
1448
1449
    /* validity flags for the left, up-left, up, and up-right fragments */
1450
    int fl, ful, fu, fur;
1451
1452
    /* DC values for the left, up-left, up, and up-right fragments */
1453
    int vl, vul, vu, vur;
1454
1455
    /* indices for the left, up-left, up, and up-right fragments */
1456
    int l, ul, u, ur;
1457
1458 115329f1 Diego Biurrun
    /*
1459 d86053a4 Mike Melanson
     * The 6 fields mean:
1460
     *   0: up-left multiplier
1461
     *   1: up multiplier
1462
     *   2: up-right multiplier
1463
     *   3: left multiplier
1464
     *   4: mask
1465
     *   5: right bit shift divisor (e.g., 7 means >>=7, a.k.a. div by 128)
1466
     */
1467
    int predictor_transform[16][6] = {
1468
        {  0,  0,  0,  0,   0,  0 },
1469
        {  0,  0,  0,  1,   0,  0 },        // PL
1470
        {  0,  0,  1,  0,   0,  0 },        // PUR
1471
        {  0,  0, 53, 75, 127,  7 },        // PUR|PL
1472
        {  0,  1,  0,  0,   0,  0 },        // PU
1473
        {  0,  1,  0,  1,   1,  1 },        // PU|PL
1474
        {  0,  1,  0,  0,   0,  0 },        // PU|PUR
1475
        {  0,  0, 53, 75, 127,  7 },        // PU|PUR|PL
1476
        {  1,  0,  0,  0,   0,  0 },        // PUL
1477
        {  0,  0,  0,  1,   0,  0 },        // PUL|PL
1478
        {  1,  0,  1,  0,   1,  1 },        // PUL|PUR
1479
        {  0,  0, 53, 75, 127,  7 },        // PUL|PUR|PL
1480
        {  0,  1,  0,  0,   0,  0 },        // PUL|PU
1481
        {-26, 29,  0, 29,  31,  5 },        // PUL|PU|PL
1482
        {  3, 10,  3,  0,  15,  4 },        // PUL|PU|PUR
1483
        {-26, 29,  0, 29,  31,  5 }         // PUL|PU|PUR|PL
1484
    };
1485
1486
    /* This table shows which types of blocks can use other blocks for
1487
     * prediction. For example, INTRA is the only mode in this table to
1488
     * have a frame number of 0. That means INTRA blocks can only predict
1489 115329f1 Diego Biurrun
     * from other INTRA blocks. There are 2 golden frame coding types;
1490 d86053a4 Mike Melanson
     * blocks encoding in these modes can only predict from other blocks
1491
     * that were encoded with these 1 of these 2 modes. */
1492
    unsigned char compatible_frame[8] = {
1493
        1,    /* MODE_INTER_NO_MV */
1494
        0,    /* MODE_INTRA */
1495
        1,    /* MODE_INTER_PLUS_MV */
1496
        1,    /* MODE_INTER_LAST_MV */
1497
        1,    /* MODE_INTER_PRIOR_MV */
1498
        2,    /* MODE_USING_GOLDEN */
1499
        2,    /* MODE_GOLDEN_MV */
1500
        1     /* MODE_INTER_FOUR_MV */
1501
    };
1502
    int current_frame_type;
1503
1504
    /* there is a last DC predictor for each of the 3 frame types */
1505
    short last_dc[3];
1506
1507
    int transform = 0;
1508
1509
    debug_vp3("  vp3: reversing DC prediction\n");
1510
1511
    vul = vu = vur = vl = 0;
1512
    last_dc[0] = last_dc[1] = last_dc[2] = 0;
1513
1514
    /* for each fragment row... */
1515
    for (y = 0; y < fragment_height; y++) {
1516
1517
        /* for each fragment in a row... */
1518
        for (x = 0; x < fragment_width; x++, i++) {
1519
1520
            /* reverse prediction if this block was coded */
1521
            if (s->all_fragments[i].coding_method != MODE_COPY) {
1522
1523 115329f1 Diego Biurrun
                current_frame_type =
1524 d86053a4 Mike Melanson
                    compatible_frame[s->all_fragments[i].coding_method];
1525
                predictor_group = (x == 0) + ((y == 0) << 1) +
1526
                    ((x + 1 == fragment_width) << 2);
1527
                debug_dc_pred(" frag %d: group %d, orig DC = %d, ",
1528 7beddb12 Michael Niedermayer
                    i, predictor_group, DC_COEFF(i));
1529 d86053a4 Mike Melanson
1530
                switch (predictor_group) {
1531
1532
                case 0:
1533
                    /* main body of fragments; consider all 4 possible
1534
                     * fragments for prediction */
1535
1536
                    /* calculate the indices of the predicting fragments */
1537
                    ul = i - fragment_width - 1;
1538
                    u = i - fragment_width;
1539
                    ur = i - fragment_width + 1;
1540
                    l = i - 1;
1541
1542
                    /* fetch the DC values for the predicting fragments */
1543 7beddb12 Michael Niedermayer
                    vul = DC_COEFF(ul);
1544
                    vu = DC_COEFF(u);
1545
                    vur = DC_COEFF(ur);
1546
                    vl = DC_COEFF(l);
1547 d86053a4 Mike Melanson
1548
                    /* figure out which fragments are valid */
1549
                    ful = FRAME_CODED(ul) && COMPATIBLE_FRAME(ul);
1550
                    fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1551
                    fur = FRAME_CODED(ur) && COMPATIBLE_FRAME(ur);
1552
                    fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1553
1554
                    /* decide which predictor transform to use */
1555
                    transform = (fl*PL) | (fu*PU) | (ful*PUL) | (fur*PUR);
1556
1557
                    break;
1558
1559
                case 1:
1560
                    /* left column of fragments, not including top corner;
1561
                     * only consider up and up-right fragments */
1562
1563
                    /* calculate the indices of the predicting fragments */
1564
                    u = i - fragment_width;
1565
                    ur = i - fragment_width + 1;
1566
1567
                    /* fetch the DC values for the predicting fragments */
1568 7beddb12 Michael Niedermayer
                    vu = DC_COEFF(u);
1569
                    vur = DC_COEFF(ur);
1570 d86053a4 Mike Melanson
1571
                    /* figure out which fragments are valid */
1572
                    fur = FRAME_CODED(ur) && COMPATIBLE_FRAME(ur);
1573
                    fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1574
1575
                    /* decide which predictor transform to use */
1576
                    transform = (fu*PU) | (fur*PUR);
1577
1578
                    break;
1579
1580
                case 2:
1581
                case 6:
1582
                    /* top row of fragments, not including top-left frag;
1583
                     * only consider the left fragment for prediction */
1584
1585
                    /* calculate the indices of the predicting fragments */
1586
                    l = i - 1;
1587
1588
                    /* fetch the DC values for the predicting fragments */
1589 7beddb12 Michael Niedermayer
                    vl = DC_COEFF(l);
1590 d86053a4 Mike Melanson
1591
                    /* figure out which fragments are valid */
1592
                    fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1593
1594
                    /* decide which predictor transform to use */
1595
                    transform = (fl*PL);
1596
1597
                    break;
1598
1599
                case 3:
1600
                    /* top-left fragment */
1601
1602
                    /* nothing to predict from in this case */
1603
                    transform = 0;
1604
1605
                    break;
1606
1607
                case 4:
1608
                    /* right column of fragments, not including top corner;
1609
                     * consider up-left, up, and left fragments for
1610
                     * prediction */
1611
1612
                    /* calculate the indices of the predicting fragments */
1613
                    ul = i - fragment_width - 1;
1614
                    u = i - fragment_width;
1615
                    l = i - 1;
1616
1617
                    /* fetch the DC values for the predicting fragments */
1618 7beddb12 Michael Niedermayer
                    vul = DC_COEFF(ul);
1619
                    vu = DC_COEFF(u);
1620
                    vl = DC_COEFF(l);
1621 d86053a4 Mike Melanson
1622
                    /* figure out which fragments are valid */
1623
                    ful = FRAME_CODED(ul) && COMPATIBLE_FRAME(ul);
1624
                    fu = FRAME_CODED(u) && COMPATIBLE_FRAME(u);
1625
                    fl = FRAME_CODED(l) && COMPATIBLE_FRAME(l);
1626
1627
                    /* decide which predictor transform to use */
1628
                    transform = (fl*PL) | (fu*PU) | (ful*PUL);
1629
1630
                    break;
1631
1632
                }
1633
1634
                debug_dc_pred("transform = %d, ", transform);
1635
1636
                if (transform == 0) {
1637
1638
                    /* if there were no fragments to predict from, use last
1639
                     * DC saved */
1640 7beddb12 Michael Niedermayer
                    predicted_dc = last_dc[current_frame_type];
1641 115329f1 Diego Biurrun
                    debug_dc_pred("from last DC (%d) = %d\n",
1642 7beddb12 Michael Niedermayer
                        current_frame_type, DC_COEFF(i));
1643 d86053a4 Mike Melanson
1644
                } else {
1645
1646
                    /* apply the appropriate predictor transform */
1647
                    predicted_dc =
1648
                        (predictor_transform[transform][0] * vul) +
1649
                        (predictor_transform[transform][1] * vu) +
1650
                        (predictor_transform[transform][2] * vur) +
1651
                        (predictor_transform[transform][3] * vl);
1652
1653
                    /* if there is a shift value in the transform, add
1654
                     * the sign bit before the shift */
1655
                    if (predictor_transform[transform][5] != 0) {
1656 115329f1 Diego Biurrun
                        predicted_dc += ((predicted_dc >> 15) &
1657 d86053a4 Mike Melanson
                            predictor_transform[transform][4]);
1658
                        predicted_dc >>= predictor_transform[transform][5];
1659
                    }
1660
1661
                    /* check for outranging on the [ul u l] and
1662
                     * [ul u ur l] predictors */
1663
                    if ((transform == 13) || (transform == 15)) {
1664
                        if (iabs(predicted_dc - vu) > 128)
1665
                            predicted_dc = vu;
1666
                        else if (iabs(predicted_dc - vl) > 128)
1667
                            predicted_dc = vl;
1668
                        else if (iabs(predicted_dc - vul) > 128)
1669
                            predicted_dc = vul;
1670
                    }
1671
1672 115329f1 Diego Biurrun
                    debug_dc_pred("from pred DC = %d\n",
1673 7beddb12 Michael Niedermayer
                    DC_COEFF(i));
1674 d86053a4 Mike Melanson
                }
1675
1676 7beddb12 Michael Niedermayer
                /* at long last, apply the predictor */
1677
                if(s->coeffs[i].index){
1678
                    *s->next_coeff= s->coeffs[i];
1679
                    s->coeffs[i].index=0;
1680
                    s->coeffs[i].coeff=0;
1681
                    s->coeffs[i].next= s->next_coeff++;
1682
                }
1683
                s->coeffs[i].coeff += predicted_dc;
1684 d86053a4 Mike Melanson
                /* save the DC */
1685 7beddb12 Michael Niedermayer
                last_dc[current_frame_type] = DC_COEFF(i);
1686
                if(DC_COEFF(i) && !(s->all_fragments[i].coeff_count&127)){
1687
                    s->all_fragments[i].coeff_count= 129;
1688
//                    s->all_fragments[i].next_coeff= s->next_coeff;
1689
                    s->coeffs[i].next= s->next_coeff;
1690
                    (s->next_coeff++)->next=NULL;
1691
                }
1692 d86053a4 Mike Melanson
            }
1693
        }
1694
    }
1695
}
1696
1697 f44b08a5 Mike Melanson
1698
static void horizontal_filter(unsigned char *first_pixel, int stride,
1699
    int *bounding_values);
1700
static void vertical_filter(unsigned char *first_pixel, int stride,
1701
    int *bounding_values);
1702
1703 d86053a4 Mike Melanson
/*
1704 dc4b78d9 Mike Melanson
 * Perform the final rendering for a particular slice of data.
1705
 * The slice number ranges from 0..(macroblock_height - 1).
1706
 */
1707
static void render_slice(Vp3DecodeContext *s, int slice)
1708
{
1709
    int x, y;
1710
    int m, n;
1711
    int i;  /* indicates current fragment */
1712
    int16_t *dequantizer;
1713 68b51e58 Steve L'Homme
    DECLARE_ALIGNED_16(DCTELEM, block[64]);
1714 dc4b78d9 Mike Melanson
    unsigned char *output_plane;
1715
    unsigned char *last_plane;
1716
    unsigned char *golden_plane;
1717
    int stride;
1718
    int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1719
    int upper_motion_limit, lower_motion_limit;
1720
    int motion_halfpel_index;
1721
    uint8_t *motion_source;
1722
    int plane;
1723
    int plane_width;
1724
    int plane_height;
1725
    int slice_height;
1726
    int current_macroblock_entry = slice * s->macroblock_width * 6;
1727 f44b08a5 Mike Melanson
    int fragment_width;
1728 dc4b78d9 Mike Melanson
1729
    if (slice >= s->macroblock_height)
1730
        return;
1731
1732
    for (plane = 0; plane < 3; plane++) {
1733
1734
        /* set up plane-specific parameters */
1735
        if (plane == 0) {
1736
            output_plane = s->current_frame.data[0];
1737
            last_plane = s->last_frame.data[0];
1738
            golden_plane = s->golden_frame.data[0];
1739
            stride = s->current_frame.linesize[0];
1740
            if (!s->flipped_image) stride = -stride;
1741
            upper_motion_limit = 7 * s->current_frame.linesize[0];
1742
            lower_motion_limit = s->height * s->current_frame.linesize[0] + s->width - 8;
1743
            y = slice * FRAGMENT_PIXELS * 2;
1744
            plane_width = s->width;
1745
            plane_height = s->height;
1746
            slice_height = y + FRAGMENT_PIXELS * 2;
1747
            i = s->macroblock_fragments[current_macroblock_entry + 0];
1748
        } else if (plane == 1) {
1749
            output_plane = s->current_frame.data[1];
1750
            last_plane = s->last_frame.data[1];
1751
            golden_plane = s->golden_frame.data[1];
1752
            stride = s->current_frame.linesize[1];
1753
            if (!s->flipped_image) stride = -stride;
1754
            upper_motion_limit = 7 * s->current_frame.linesize[1];
1755
            lower_motion_limit = (s->height / 2) * s->current_frame.linesize[1] + (s->width / 2) - 8;
1756
            y = slice * FRAGMENT_PIXELS;
1757
            plane_width = s->width / 2;
1758
            plane_height = s->height / 2;
1759
            slice_height = y + FRAGMENT_PIXELS;
1760
            i = s->macroblock_fragments[current_macroblock_entry + 4];
1761
        } else {
1762
            output_plane = s->current_frame.data[2];
1763
            last_plane = s->last_frame.data[2];
1764
            golden_plane = s->golden_frame.data[2];
1765
            stride = s->current_frame.linesize[2];
1766
            if (!s->flipped_image) stride = -stride;
1767
            upper_motion_limit = 7 * s->current_frame.linesize[2];
1768
            lower_motion_limit = (s->height / 2) * s->current_frame.linesize[2] + (s->width / 2) - 8;
1769
            y = slice * FRAGMENT_PIXELS;
1770
            plane_width = s->width / 2;
1771
            plane_height = s->height / 2;
1772
            slice_height = y + FRAGMENT_PIXELS;
1773
            i = s->macroblock_fragments[current_macroblock_entry + 5];
1774
        }
1775 2935001c Mike Melanson
        fragment_width = plane_width / FRAGMENT_PIXELS;
1776 115329f1 Diego Biurrun
1777 dc4b78d9 Mike Melanson
        if(ABS(stride) > 2048)
1778
            return; //various tables are fixed size
1779
1780
        /* for each fragment row in the slice (both of them)... */
1781
        for (; y < slice_height; y += 8) {
1782
1783
            /* for each fragment in a row... */
1784
            for (x = 0; x < plane_width; x += 8, i++) {
1785
1786
                if ((i < 0) || (i >= s->fragment_count)) {
1787
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:render_slice(): bad fragment number (%d)\n", i);
1788
                    return;
1789
                }
1790
1791
                /* transform if this block was coded */
1792
                if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1793
                    !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1794
1795
                    if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1796
                        (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1797
                        motion_source= golden_plane;
1798 115329f1 Diego Biurrun
                    else
1799 dc4b78d9 Mike Melanson
                        motion_source= last_plane;
1800
1801
                    motion_source += s->all_fragments[i].first_pixel;
1802
                    motion_halfpel_index = 0;
1803
1804
                    /* sort out the motion vector if this fragment is coded
1805
                     * using a motion vector method */
1806
                    if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1807
                        (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1808
                        int src_x, src_y;
1809
                        motion_x = s->all_fragments[i].motion_x;
1810
                        motion_y = s->all_fragments[i].motion_y;
1811
                        if(plane){
1812
                            motion_x= (motion_x>>1) | (motion_x&1);
1813
                            motion_y= (motion_y>>1) | (motion_y&1);
1814
                        }
1815
1816
                        src_x= (motion_x>>1) + x;
1817
                        src_y= (motion_y>>1) + y;
1818
                        if ((motion_x == 127) || (motion_y == 127))
1819
                            av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1820
1821
                        motion_halfpel_index = motion_x & 0x01;
1822
                        motion_source += (motion_x >> 1);
1823
1824
                        motion_halfpel_index |= (motion_y & 0x01) << 1;
1825
                        motion_source += ((motion_y >> 1) * stride);
1826
1827
                        if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1828
                            uint8_t *temp= s->edge_emu_buffer;
1829
                            if(stride<0) temp -= 9*stride;
1830
                            else temp += 9*stride;
1831
1832
                            ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1833
                            motion_source= temp;
1834
                        }
1835
                    }
1836 115329f1 Diego Biurrun
1837 dc4b78d9 Mike Melanson
1838
                    /* first, take care of copying a block from either the
1839
                     * previous or the golden frame */
1840
                    if (s->all_fragments[i].coding_method != MODE_INTRA) {
1841 115329f1 Diego Biurrun
                        /* Note, it is possible to implement all MC cases with
1842
                           put_no_rnd_pixels_l2 which would look more like the
1843
                           VP3 source but this would be slower as
1844 dc4b78d9 Mike Melanson
                           put_no_rnd_pixels_tab is better optimzed */
1845
                        if(motion_halfpel_index != 3){
1846
                            s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1847
                                output_plane + s->all_fragments[i].first_pixel,
1848
                                motion_source, stride, 8);
1849
                        }else{
1850
                            int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1851
                            s->dsp.put_no_rnd_pixels_l2[1](
1852
                                output_plane + s->all_fragments[i].first_pixel,
1853 115329f1 Diego Biurrun
                                motion_source - d,
1854
                                motion_source + stride + 1 + d,
1855 dc4b78d9 Mike Melanson
                                stride, 8);
1856
                        }
1857
                        dequantizer = s->inter_dequant;
1858
                    }else{
1859
                        if (plane == 0)
1860
                            dequantizer = s->intra_y_dequant;
1861
                        else
1862
                            dequantizer = s->intra_c_dequant;
1863
                    }
1864
1865
                    /* dequantize the DCT coefficients */
1866 115329f1 Diego Biurrun
                    debug_idct("fragment %d, coding mode %d, DC = %d, dequant = %d:\n",
1867
                        i, s->all_fragments[i].coding_method,
1868 dc4b78d9 Mike Melanson
                        DC_COEFF(i), dequantizer[0]);
1869
1870
                    if(s->avctx->idct_algo==FF_IDCT_VP3){
1871
                        Coeff *coeff= s->coeffs + i;
1872
                        memset(block, 0, sizeof(block));
1873
                        while(coeff->next){
1874
                            block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1875
                            coeff= coeff->next;
1876
                        }
1877
                    }else{
1878
                        Coeff *coeff= s->coeffs + i;
1879
                        memset(block, 0, sizeof(block));
1880
                        while(coeff->next){
1881
                            block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1882
                            coeff= coeff->next;
1883
                        }
1884
                    }
1885
1886
                    /* invert DCT and place (or add) in final output */
1887 115329f1 Diego Biurrun
1888 dc4b78d9 Mike Melanson
                    if (s->all_fragments[i].coding_method == MODE_INTRA) {
1889
                        if(s->avctx->idct_algo!=FF_IDCT_VP3)
1890
                            block[0] += 128<<3;
1891
                        s->dsp.idct_put(
1892
                            output_plane + s->all_fragments[i].first_pixel,
1893
                            stride,
1894
                            block);
1895
                    } else {
1896
                        s->dsp.idct_add(
1897
                            output_plane + s->all_fragments[i].first_pixel,
1898
                            stride,
1899
                            block);
1900
                    }
1901
1902
                    debug_idct("block after idct_%s():\n",
1903
                        (s->all_fragments[i].coding_method == MODE_INTRA)?
1904
                        "put" : "add");
1905
                    for (m = 0; m < 8; m++) {
1906
                        for (n = 0; n < 8; n++) {
1907 115329f1 Diego Biurrun
                            debug_idct(" %3d", *(output_plane +
1908 dc4b78d9 Mike Melanson
                                s->all_fragments[i].first_pixel + (m * stride + n)));
1909
                        }
1910
                        debug_idct("\n");
1911
                    }
1912
                    debug_idct("\n");
1913
1914
                } else {
1915
1916
                    /* copy directly from the previous frame */
1917
                    s->dsp.put_pixels_tab[1][0](
1918
                        output_plane + s->all_fragments[i].first_pixel,
1919
                        last_plane + s->all_fragments[i].first_pixel,
1920
                        stride, 8);
1921
1922
                }
1923 72053728 Michael Niedermayer
#if 0
1924 2935001c Mike Melanson
                /* perform the left edge filter if:
1925
                 *   - the fragment is not on the left column
1926
                 *   - the fragment is coded in this frame
1927
                 *   - the fragment is not coded in this frame but the left
1928
                 *     fragment is coded in this frame (this is done instead
1929
                 *     of a right edge filter when rendering the left fragment
1930
                 *     since this fragment is not available yet) */
1931 f44b08a5 Mike Melanson
                if ((x > 0) &&
1932 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1933
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1934
                      (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
1935 f44b08a5 Mike Melanson
                    horizontal_filter(
1936 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel + 7*stride,
1937
                        -stride, bounding_values);
1938 f44b08a5 Mike Melanson
                }
1939

1940 2935001c Mike Melanson
                /* perform the top edge filter if:
1941
                 *   - the fragment is not on the top row
1942
                 *   - the fragment is coded in this frame
1943
                 *   - the fragment is not coded in this frame but the above
1944
                 *     fragment is coded in this frame (this is done instead
1945
                 *     of a bottom edge filter when rendering the above
1946
                 *     fragment since this fragment is not available yet) */
1947 f44b08a5 Mike Melanson
                if ((y > 0) &&
1948 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1949
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1950
                      (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
1951 f44b08a5 Mike Melanson
                    vertical_filter(
1952 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel - stride,
1953
                        -stride, bounding_values);
1954 f44b08a5 Mike Melanson
                }
1955 72053728 Michael Niedermayer
#endif
1956 dc4b78d9 Mike Melanson
            }
1957
        }
1958
    }
1959
1960
     /* this looks like a good place for slice dispatch... */
1961
     /* algorithm:
1962
      *   if (slice == s->macroblock_height - 1)
1963 f44b08a5 Mike Melanson
      *     dispatch (both last slice & 2nd-to-last slice);
1964
      *   else if (slice > 0)
1965
      *     dispatch (slice - 1);
1966 dc4b78d9 Mike Melanson
      */
1967
1968
    emms_c();
1969
}
1970
1971 a54ea19a Mike Melanson
static void horizontal_filter(unsigned char *first_pixel, int stride,
1972
    int *bounding_values)
1973
{
1974 6f7aa589 Michael Niedermayer
    unsigned char *end;
1975 a54ea19a Mike Melanson
    int filter_value;
1976
1977 6f7aa589 Michael Niedermayer
    for (end= first_pixel + 8*stride; first_pixel < end; first_pixel += stride) {
1978 115329f1 Diego Biurrun
        filter_value =
1979 6f7aa589 Michael Niedermayer
            (first_pixel[-2] - first_pixel[ 1])
1980
         +3*(first_pixel[ 0] - first_pixel[-1]);
1981 a54ea19a Mike Melanson
        filter_value = bounding_values[(filter_value + 4) >> 3];
1982 ee408ead Michael Niedermayer
        first_pixel[-1] = clip_uint8(first_pixel[-1] + filter_value);
1983
        first_pixel[ 0] = clip_uint8(first_pixel[ 0] - filter_value);
1984 a54ea19a Mike Melanson
    }
1985
}
1986
1987
static void vertical_filter(unsigned char *first_pixel, int stride,
1988
    int *bounding_values)
1989
{
1990 6f7aa589 Michael Niedermayer
    unsigned char *end;
1991 a54ea19a Mike Melanson
    int filter_value;
1992 6f7aa589 Michael Niedermayer
    const int nstride= -stride;
1993 a54ea19a Mike Melanson
1994 6f7aa589 Michael Niedermayer
    for (end= first_pixel + 8; first_pixel < end; first_pixel++) {
1995 115329f1 Diego Biurrun
        filter_value =
1996 6f7aa589 Michael Niedermayer
            (first_pixel[2 * nstride] - first_pixel[ stride])
1997
         +3*(first_pixel[0          ] - first_pixel[nstride]);
1998 a54ea19a Mike Melanson
        filter_value = bounding_values[(filter_value + 4) >> 3];
1999 6f7aa589 Michael Niedermayer
        first_pixel[nstride] = clip_uint8(first_pixel[nstride] + filter_value);
2000 ee408ead Michael Niedermayer
        first_pixel[0] = clip_uint8(first_pixel[0] - filter_value);
2001 a54ea19a Mike Melanson
    }
2002
}
2003
2004
static void apply_loop_filter(Vp3DecodeContext *s)
2005
{
2006
    int x, y, plane;
2007
    int width, height;
2008
    int fragment;
2009
    int stride;
2010
    unsigned char *plane_data;
2011 f44b08a5 Mike Melanson
    int *bounding_values= s->bounding_values_array+127;
2012 d5e18835 Michael Niedermayer
2013 f44b08a5 Mike Melanson
#if 0
2014 d5e18835 Michael Niedermayer
    int bounding_values_array[256];
2015 a54ea19a Mike Melanson
    int filter_limit;
2016

2017
    /* find the right loop limit value */
2018
    for (x = 63; x >= 0; x--) {
2019
        if (vp31_ac_scale_factor[x] >= s->quality_index)
2020
            break;
2021
    }
2022 d5e18835 Michael Niedermayer
    filter_limit = vp31_filter_limit_values[s->quality_index];
2023 a54ea19a Mike Melanson

2024
    /* set up the bounding values */
2025 d5e18835 Michael Niedermayer
    memset(bounding_values_array, 0, 256 * sizeof(int));
2026 a54ea19a Mike Melanson
    for (x = 0; x < filter_limit; x++) {
2027
        bounding_values[-x - filter_limit] = -filter_limit + x;
2028
        bounding_values[-x] = -x;
2029
        bounding_values[x] = x;
2030
        bounding_values[x + filter_limit] = filter_limit - x;
2031
    }
2032 f44b08a5 Mike Melanson
#endif
2033 a54ea19a Mike Melanson
2034
    for (plane = 0; plane < 3; plane++) {
2035
2036
        if (plane == 0) {
2037
            /* Y plane parameters */
2038
            fragment = 0;
2039
            width = s->fragment_width;
2040
            height = s->fragment_height;
2041
            stride = s->current_frame.linesize[0];
2042
            plane_data = s->current_frame.data[0];
2043
        } else if (plane == 1) {
2044
            /* U plane parameters */
2045
            fragment = s->u_fragment_start;
2046
            width = s->fragment_width / 2;
2047
            height = s->fragment_height / 2;
2048
            stride = s->current_frame.linesize[1];
2049
            plane_data = s->current_frame.data[1];
2050
        } else {
2051
            /* V plane parameters */
2052
            fragment = s->v_fragment_start;
2053
            width = s->fragment_width / 2;
2054
            height = s->fragment_height / 2;
2055
            stride = s->current_frame.linesize[2];
2056
            plane_data = s->current_frame.data[2];
2057
        }
2058
2059
        for (y = 0; y < height; y++) {
2060 d86053a4 Mike Melanson
2061 a54ea19a Mike Melanson
            for (x = 0; x < width; x++) {
2062 220a6f40 Michael Niedermayer
START_TIMER
2063 a54ea19a Mike Melanson
                /* do not perform left edge filter for left columns frags */
2064
                if ((x > 0) &&
2065
                    (s->all_fragments[fragment].coding_method != MODE_COPY)) {
2066
                    horizontal_filter(
2067 115329f1 Diego Biurrun
                        plane_data + s->all_fragments[fragment].first_pixel - 7*stride,
2068 a54ea19a Mike Melanson
                        stride, bounding_values);
2069
                }
2070
2071
                /* do not perform top edge filter for top row fragments */
2072
                if ((y > 0) &&
2073
                    (s->all_fragments[fragment].coding_method != MODE_COPY)) {
2074
                    vertical_filter(
2075 115329f1 Diego Biurrun
                        plane_data + s->all_fragments[fragment].first_pixel + stride,
2076 a54ea19a Mike Melanson
                        stride, bounding_values);
2077
                }
2078
2079
                /* do not perform right edge filter for right column
2080
                 * fragments or if right fragment neighbor is also coded
2081
                 * in this frame (it will be filtered in next iteration) */
2082
                if ((x < width - 1) &&
2083
                    (s->all_fragments[fragment].coding_method != MODE_COPY) &&
2084
                    (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
2085
                    horizontal_filter(
2086 115329f1 Diego Biurrun
                        plane_data + s->all_fragments[fragment + 1].first_pixel - 7*stride,
2087 a54ea19a Mike Melanson
                        stride, bounding_values);
2088
                }
2089
2090
                /* do not perform bottom edge filter for bottom row
2091
                 * fragments or if bottom fragment neighbor is also coded
2092
                 * in this frame (it will be filtered in the next row) */
2093
                if ((y < height - 1) &&
2094
                    (s->all_fragments[fragment].coding_method != MODE_COPY) &&
2095
                    (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
2096
                    vertical_filter(
2097 115329f1 Diego Biurrun
                        plane_data + s->all_fragments[fragment + width].first_pixel + stride,
2098 a54ea19a Mike Melanson
                        stride, bounding_values);
2099
                }
2100
2101
                fragment++;
2102 220a6f40 Michael Niedermayer
STOP_TIMER("loop filter")
2103 a54ea19a Mike Melanson
            }
2104
        }
2105
    }
2106 d86053a4 Mike Melanson
}
2107
2108 115329f1 Diego Biurrun
/*
2109 d86053a4 Mike Melanson
 * This function computes the first pixel addresses for each fragment.
2110
 * This function needs to be invoked after the first frame is allocated
2111
 * so that it has access to the plane strides.
2112
 */
2113 115329f1 Diego Biurrun
static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
2114 d86053a4 Mike Melanson
{
2115
2116
    int i, x, y;
2117
2118
    /* figure out the first pixel addresses for each of the fragments */
2119
    /* Y plane */
2120
    i = 0;
2121
    for (y = s->fragment_height; y > 0; y--) {
2122
        for (x = 0; x < s->fragment_width; x++) {
2123 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2124 d86053a4 Mike Melanson
                s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
2125
                    s->golden_frame.linesize[0] +
2126
                    x * FRAGMENT_PIXELS;
2127 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2128 d86053a4 Mike Melanson
                i-1, s->all_fragments[i-1].first_pixel);
2129
        }
2130
    }
2131
2132
    /* U plane */
2133
    i = s->u_fragment_start;
2134
    for (y = s->fragment_height / 2; y > 0; y--) {
2135
        for (x = 0; x < s->fragment_width / 2; x++) {
2136 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2137 d86053a4 Mike Melanson
                s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
2138
                    s->golden_frame.linesize[1] +
2139
                    x * FRAGMENT_PIXELS;
2140 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2141 d86053a4 Mike Melanson
                i-1, s->all_fragments[i-1].first_pixel);
2142
        }
2143
    }
2144
2145
    /* V plane */
2146
    i = s->v_fragment_start;
2147
    for (y = s->fragment_height / 2; y > 0; y--) {
2148
        for (x = 0; x < s->fragment_width / 2; x++) {
2149 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2150 d86053a4 Mike Melanson
                s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
2151
                    s->golden_frame.linesize[2] +
2152
                    x * FRAGMENT_PIXELS;
2153 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2154 d86053a4 Mike Melanson
                i-1, s->all_fragments[i-1].first_pixel);
2155
        }
2156
    }
2157
}
2158
2159 9a7ad925 Alex Beregszaszi
/* FIXME: this should be merged with the above! */
2160 115329f1 Diego Biurrun
static void theora_calculate_pixel_addresses(Vp3DecodeContext *s)
2161 9a7ad925 Alex Beregszaszi
{
2162
2163
    int i, x, y;
2164
2165
    /* figure out the first pixel addresses for each of the fragments */
2166
    /* Y plane */
2167
    i = 0;
2168
    for (y = 1; y <= s->fragment_height; y++) {
2169
        for (x = 0; x < s->fragment_width; x++) {
2170 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2171 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
2172
                    s->golden_frame.linesize[0] +
2173
                    x * FRAGMENT_PIXELS;
2174 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2175 9a7ad925 Alex Beregszaszi
                i-1, s->all_fragments[i-1].first_pixel);
2176
        }
2177
    }
2178
2179
    /* U plane */
2180
    i = s->u_fragment_start;
2181
    for (y = 1; y <= s->fragment_height / 2; y++) {
2182
        for (x = 0; x < s->fragment_width / 2; x++) {
2183 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2184 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
2185
                    s->golden_frame.linesize[1] +
2186
                    x * FRAGMENT_PIXELS;
2187 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2188 9a7ad925 Alex Beregszaszi
                i-1, s->all_fragments[i-1].first_pixel);
2189
        }
2190
    }
2191
2192
    /* V plane */
2193
    i = s->v_fragment_start;
2194
    for (y = 1; y <= s->fragment_height / 2; y++) {
2195
        for (x = 0; x < s->fragment_width / 2; x++) {
2196 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
2197 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
2198
                    s->golden_frame.linesize[2] +
2199
                    x * FRAGMENT_PIXELS;
2200 115329f1 Diego Biurrun
            debug_init("  fragment %d, first pixel @ %d\n",
2201 9a7ad925 Alex Beregszaszi
                i-1, s->all_fragments[i-1].first_pixel);
2202
        }
2203
    }
2204
}
2205
2206 d86053a4 Mike Melanson
/*
2207
 * This is the ffmpeg/libavcodec API init function.
2208
 */
2209
static int vp3_decode_init(AVCodecContext *avctx)
2210
{
2211
    Vp3DecodeContext *s = avctx->priv_data;
2212
    int i;
2213 892fc83e Mike Melanson
    int c_width;
2214
    int c_height;
2215
    int y_superblock_count;
2216
    int c_superblock_count;
2217 d86053a4 Mike Melanson
2218 3c3f113e Alex Beregszaszi
    if (avctx->codec_tag == MKTAG('V','P','3','0'))
2219 bb270c08 Diego Biurrun
        s->version = 0;
2220 3c3f113e Alex Beregszaszi
    else
2221 bb270c08 Diego Biurrun
        s->version = 1;
2222 3c3f113e Alex Beregszaszi
2223 d86053a4 Mike Melanson
    s->avctx = avctx;
2224 642d7e84 Mike Melanson
    s->width = (avctx->width + 15) & 0xFFFFFFF0;
2225
    s->height = (avctx->height + 15) & 0xFFFFFFF0;
2226 d86053a4 Mike Melanson
    avctx->pix_fmt = PIX_FMT_YUV420P;
2227
    avctx->has_b_frames = 0;
2228 8b6103da Michael Niedermayer
    if(avctx->idct_algo==FF_IDCT_AUTO)
2229
        avctx->idct_algo=FF_IDCT_VP3;
2230 d86053a4 Mike Melanson
    dsputil_init(&s->dsp, avctx);
2231 115329f1 Diego Biurrun
2232 36af0c95 Michael Niedermayer
    ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
2233 d86053a4 Mike Melanson
2234
    /* initialize to an impossible value which will force a recalculation
2235
     * in the first frame decode */
2236
    s->quality_index = -1;
2237
2238 892fc83e Mike Melanson
    s->y_superblock_width = (s->width + 31) / 32;
2239
    s->y_superblock_height = (s->height + 31) / 32;
2240
    y_superblock_count = s->y_superblock_width * s->y_superblock_height;
2241
2242
    /* work out the dimensions for the C planes */
2243
    c_width = s->width / 2;
2244
    c_height = s->height / 2;
2245
    s->c_superblock_width = (c_width + 31) / 32;
2246
    s->c_superblock_height = (c_height + 31) / 32;
2247
    c_superblock_count = s->c_superblock_width * s->c_superblock_height;
2248
2249
    s->superblock_count = y_superblock_count + (c_superblock_count * 2);
2250
    s->u_superblock_start = y_superblock_count;
2251
    s->v_superblock_start = s->u_superblock_start + c_superblock_count;
2252 d86053a4 Mike Melanson
    s->superblock_coding = av_malloc(s->superblock_count);
2253
2254
    s->macroblock_width = (s->width + 15) / 16;
2255
    s->macroblock_height = (s->height + 15) / 16;
2256
    s->macroblock_count = s->macroblock_width * s->macroblock_height;
2257
2258
    s->fragment_width = s->width / FRAGMENT_PIXELS;
2259
    s->fragment_height = s->height / FRAGMENT_PIXELS;
2260
2261
    /* fragment count covers all 8x8 blocks for all 3 planes */
2262
    s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
2263
    s->u_fragment_start = s->fragment_width * s->fragment_height;
2264
    s->v_fragment_start = s->fragment_width * s->fragment_height * 5 / 4;
2265
2266 892fc83e Mike Melanson
    debug_init("  Y plane: %d x %d\n", s->width, s->height);
2267
    debug_init("  C plane: %d x %d\n", c_width, c_height);
2268
    debug_init("  Y superblocks: %d x %d, %d total\n",
2269
        s->y_superblock_width, s->y_superblock_height, y_superblock_count);
2270
    debug_init("  C superblocks: %d x %d, %d total\n",
2271
        s->c_superblock_width, s->c_superblock_height, c_superblock_count);
2272 115329f1 Diego Biurrun
    debug_init("  total superblocks = %d, U starts @ %d, V starts @ %d\n",
2273 892fc83e Mike Melanson
        s->superblock_count, s->u_superblock_start, s->v_superblock_start);
2274 d86053a4 Mike Melanson
    debug_init("  macroblocks: %d x %d, %d total\n",
2275
        s->macroblock_width, s->macroblock_height, s->macroblock_count);
2276
    debug_init("  %d fragments, %d x %d, u starts @ %d, v starts @ %d\n",
2277
        s->fragment_count,
2278
        s->fragment_width,
2279
        s->fragment_height,
2280
        s->u_fragment_start,
2281
        s->v_fragment_start);
2282
2283
    s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
2284 7beddb12 Michael Niedermayer
    s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
2285 d86053a4 Mike Melanson
    s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
2286
    s->pixel_addresses_inited = 0;
2287
2288 f44ee2c3 Alex Beregszaszi
    if (!s->theora_tables)
2289
    {
2290 bb270c08 Diego Biurrun
        for (i = 0; i < 64; i++)
2291
            s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
2292
        for (i = 0; i < 64; i++)
2293
            s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
2294
        for (i = 0; i < 64; i++)
2295
            s->coded_intra_y_dequant[i] = vp31_intra_y_dequant[i];
2296
        for (i = 0; i < 64; i++)
2297
            s->coded_intra_c_dequant[i] = vp31_intra_c_dequant[i];
2298
        for (i = 0; i < 64; i++)
2299
            s->coded_inter_dequant[i] = vp31_inter_dequant[i];
2300
        for (i = 0; i < 64; i++)
2301
            s->filter_limit_values[i] = vp31_filter_limit_values[i];
2302 f44ee2c3 Alex Beregszaszi
2303 39922395 Mike Melanson
        /* init VLC tables */
2304
        for (i = 0; i < 16; i++) {
2305
2306
            /* DC histograms */
2307
            init_vlc(&s->dc_vlc[i], 5, 32,
2308
                &dc_bias[i][0][1], 4, 2,
2309
                &dc_bias[i][0][0], 4, 2, 0);
2310
2311
            /* group 1 AC histograms */
2312
            init_vlc(&s->ac_vlc_1[i], 5, 32,
2313
                &ac_bias_0[i][0][1], 4, 2,
2314
                &ac_bias_0[i][0][0], 4, 2, 0);
2315
2316
            /* group 2 AC histograms */
2317
            init_vlc(&s->ac_vlc_2[i], 5, 32,
2318
                &ac_bias_1[i][0][1], 4, 2,
2319
                &ac_bias_1[i][0][0], 4, 2, 0);
2320
2321
            /* group 3 AC histograms */
2322
            init_vlc(&s->ac_vlc_3[i], 5, 32,
2323
                &ac_bias_2[i][0][1], 4, 2,
2324
                &ac_bias_2[i][0][0], 4, 2, 0);
2325
2326
            /* group 4 AC histograms */
2327
            init_vlc(&s->ac_vlc_4[i], 5, 32,
2328
                &ac_bias_3[i][0][1], 4, 2,
2329
                &ac_bias_3[i][0][0], 4, 2, 0);
2330
        }
2331
    } else {
2332
        for (i = 0; i < 16; i++) {
2333
2334
            /* DC histograms */
2335
            init_vlc(&s->dc_vlc[i], 5, 32,
2336
                &s->huffman_table[i][0][1], 4, 2,
2337
                &s->huffman_table[i][0][0], 4, 2, 0);
2338
2339
            /* group 1 AC histograms */
2340
            init_vlc(&s->ac_vlc_1[i], 5, 32,
2341
                &s->huffman_table[i+16][0][1], 4, 2,
2342
                &s->huffman_table[i+16][0][0], 4, 2, 0);
2343
2344
            /* group 2 AC histograms */
2345
            init_vlc(&s->ac_vlc_2[i], 5, 32,
2346
                &s->huffman_table[i+16*2][0][1], 4, 2,
2347
                &s->huffman_table[i+16*2][0][0], 4, 2, 0);
2348
2349
            /* group 3 AC histograms */
2350
            init_vlc(&s->ac_vlc_3[i], 5, 32,
2351
                &s->huffman_table[i+16*3][0][1], 4, 2,
2352
                &s->huffman_table[i+16*3][0][0], 4, 2, 0);
2353
2354
            /* group 4 AC histograms */
2355
            init_vlc(&s->ac_vlc_4[i], 5, 32,
2356
                &s->huffman_table[i+16*4][0][1], 4, 2,
2357
                &s->huffman_table[i+16*4][0][0], 4, 2, 0);
2358
        }
2359 d86053a4 Mike Melanson
    }
2360
2361 d8278bab Mike Melanson
    init_vlc(&s->superblock_run_length_vlc, 6, 34,
2362
        &superblock_run_length_vlc_table[0][1], 4, 2,
2363
        &superblock_run_length_vlc_table[0][0], 4, 2, 0);
2364
2365 dd36b667 Alex Beregszaszi
    init_vlc(&s->fragment_run_length_vlc, 5, 30,
2366 0ad72bdd Mike Melanson
        &fragment_run_length_vlc_table[0][1], 4, 2,
2367
        &fragment_run_length_vlc_table[0][0], 4, 2, 0);
2368
2369
    init_vlc(&s->mode_code_vlc, 3, 8,
2370
        &mode_code_vlc_table[0][1], 2, 1,
2371
        &mode_code_vlc_table[0][0], 2, 1, 0);
2372
2373
    init_vlc(&s->motion_vector_vlc, 6, 63,
2374
        &motion_vector_vlc_table[0][1], 2, 1,
2375
        &motion_vector_vlc_table[0][0], 2, 1, 0);
2376
2377 d86053a4 Mike Melanson
    /* work out the block mapping tables */
2378
    s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
2379
    s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
2380
    s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
2381 96a7e73b Mike Melanson
    s->macroblock_coding = av_malloc(s->macroblock_count + 1);
2382 d86053a4 Mike Melanson
    init_block_mapping(s);
2383
2384 44ae98dd Mike Melanson
    for (i = 0; i < 3; i++) {
2385
        s->current_frame.data[i] = NULL;
2386
        s->last_frame.data[i] = NULL;
2387
        s->golden_frame.data[i] = NULL;
2388 61873c4a Mike Melanson
    }
2389
2390 d86053a4 Mike Melanson
    return 0;
2391
}
2392
2393
/*
2394
 * This is the ffmpeg/libavcodec API frame decode function.
2395
 */
2396 115329f1 Diego Biurrun
static int vp3_decode_frame(AVCodecContext *avctx,
2397 d86053a4 Mike Melanson
                            void *data, int *data_size,
2398
                            uint8_t *buf, int buf_size)
2399
{
2400
    Vp3DecodeContext *s = avctx->priv_data;
2401
    GetBitContext gb;
2402
    static int counter = 0;
2403 dc4b78d9 Mike Melanson
    int i;
2404 d86053a4 Mike Melanson
2405
    init_get_bits(&gb, buf, buf_size * 8);
2406 115329f1 Diego Biurrun
2407 f44ee2c3 Alex Beregszaszi
    if (s->theora && get_bits1(&gb))
2408
    {
2409 7146d2c2 Alex Beregszaszi
#if 1
2410 bb270c08 Diego Biurrun
        av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
2411
        return -1;
2412 7146d2c2 Alex Beregszaszi
#else
2413 bb270c08 Diego Biurrun
        int ptype = get_bits(&gb, 7);
2414
2415
        skip_bits(&gb, 6*8); /* "theora" */
2416
2417
        switch(ptype)
2418
        {
2419
            case 1:
2420
                theora_decode_comments(avctx, gb);
2421
                break;
2422
            case 2:
2423
                theora_decode_tables(avctx, gb);
2424
                    init_dequantizer(s);
2425
                break;
2426
            default:
2427
                av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype);
2428
        }
2429
        return buf_size;
2430 7146d2c2 Alex Beregszaszi
#endif
2431 f44ee2c3 Alex Beregszaszi
    }
2432 3c3f113e Alex Beregszaszi
2433
    s->keyframe = !get_bits1(&gb);
2434
    if (!s->theora)
2435 bb270c08 Diego Biurrun
        skip_bits(&gb, 1);
2436 3c3f113e Alex Beregszaszi
    s->last_quality_index = s->quality_index;
2437
    s->quality_index = get_bits(&gb, 6);
2438 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2439 3c3f113e Alex Beregszaszi
        skip_bits1(&gb);
2440 d86053a4 Mike Melanson
2441 f8830383 Alex Beregszaszi
    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2442 bb270c08 Diego Biurrun
        av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
2443
            s->keyframe?"key":"", counter, s->quality_index);
2444 d86053a4 Mike Melanson
    counter++;
2445
2446 f44b08a5 Mike Melanson
    if (s->quality_index != s->last_quality_index) {
2447 642d7e84 Mike Melanson
        init_dequantizer(s);
2448 f44b08a5 Mike Melanson
        init_loop_filter(s);
2449
    }
2450 642d7e84 Mike Melanson
2451 d86053a4 Mike Melanson
    if (s->keyframe) {
2452 bb270c08 Diego Biurrun
        if (!s->theora)
2453
        {
2454
            skip_bits(&gb, 4); /* width code */
2455
            skip_bits(&gb, 4); /* height code */
2456
            if (s->version)
2457
            {
2458
                s->version = get_bits(&gb, 5);
2459
                if (counter == 1)
2460
                    av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
2461
            }
2462
        }
2463
        if (s->version || s->theora)
2464
        {
2465
                if (get_bits1(&gb))
2466
                    av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
2467
            skip_bits(&gb, 2); /* reserved? */
2468
        }
2469 3c3f113e Alex Beregszaszi
2470 74c0ac12 Mike Melanson
        if (s->last_frame.data[0] == s->golden_frame.data[0]) {
2471
            if (s->golden_frame.data[0])
2472
                avctx->release_buffer(avctx, &s->golden_frame);
2473 8e39d4a7 Michael Niedermayer
            s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
2474 74c0ac12 Mike Melanson
        } else {
2475
            if (s->golden_frame.data[0])
2476
                avctx->release_buffer(avctx, &s->golden_frame);
2477
            if (s->last_frame.data[0])
2478
                avctx->release_buffer(avctx, &s->last_frame);
2479
        }
2480 d86053a4 Mike Melanson
2481 8e39d4a7 Michael Niedermayer
        s->golden_frame.reference = 3;
2482 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
2483 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
2484 d86053a4 Mike Melanson
            return -1;
2485
        }
2486
2487
        /* golden frame is also the current frame */
2488 61873c4a Mike Melanson
        memcpy(&s->current_frame, &s->golden_frame, sizeof(AVFrame));
2489 d86053a4 Mike Melanson
2490
        /* time to figure out pixel addresses? */
2491
        if (!s->pixel_addresses_inited)
2492 bb270c08 Diego Biurrun
        {
2493
            if (!s->flipped_image)
2494
                vp3_calculate_pixel_addresses(s);
2495
            else
2496
                theora_calculate_pixel_addresses(s);
2497
        }
2498 d86053a4 Mike Melanson
    } else {
2499
        /* allocate a new current frame */
2500 8e39d4a7 Michael Niedermayer
        s->current_frame.reference = 3;
2501 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
2502 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
2503 d86053a4 Mike Melanson
            return -1;
2504
        }
2505
    }
2506
2507 b928ec64 Michael Niedermayer
    s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
2508
    s->current_frame.qstride= 0;
2509
2510 220a6f40 Michael Niedermayer
    {START_TIMER
2511 d86053a4 Mike Melanson
    init_frame(s, &gb);
2512 220a6f40 Michael Niedermayer
    STOP_TIMER("init_frame")}
2513 d86053a4 Mike Melanson
2514 892fc83e Mike Melanson
#if KEYFRAMES_ONLY
2515
if (!s->keyframe) {
2516
2517
    memcpy(s->current_frame.data[0], s->golden_frame.data[0],
2518
        s->current_frame.linesize[0] * s->height);
2519
    memcpy(s->current_frame.data[1], s->golden_frame.data[1],
2520
        s->current_frame.linesize[1] * s->height / 2);
2521
    memcpy(s->current_frame.data[2], s->golden_frame.data[2],
2522
        s->current_frame.linesize[2] * s->height / 2);
2523
2524
} else {
2525
#endif
2526
2527 220a6f40 Michael Niedermayer
    {START_TIMER
2528
    if (unpack_superblocks(s, &gb)){
2529
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2530
        return -1;
2531
    }
2532
    STOP_TIMER("unpack_superblocks")}
2533
    {START_TIMER
2534
    if (unpack_modes(s, &gb)){
2535
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2536
        return -1;
2537
    }
2538
    STOP_TIMER("unpack_modes")}
2539
    {START_TIMER
2540
    if (unpack_vectors(s, &gb)){
2541
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2542
        return -1;
2543
    }
2544
    STOP_TIMER("unpack_vectors")}
2545
    {START_TIMER
2546
    if (unpack_dct_coeffs(s, &gb)){
2547
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2548 892fc83e Mike Melanson
        return -1;
2549
    }
2550 220a6f40 Michael Niedermayer
    STOP_TIMER("unpack_dct_coeffs")}
2551
    {START_TIMER
2552 d86053a4 Mike Melanson
2553
    reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
2554 3d32b429 Mike Melanson
    if ((avctx->flags & CODEC_FLAG_GRAY) == 0) {
2555
        reverse_dc_prediction(s, s->u_fragment_start,
2556
            s->fragment_width / 2, s->fragment_height / 2);
2557
        reverse_dc_prediction(s, s->v_fragment_start,
2558
            s->fragment_width / 2, s->fragment_height / 2);
2559 dc4b78d9 Mike Melanson
    }
2560
    STOP_TIMER("reverse_dc_prediction")}
2561
    {START_TIMER
2562
2563
    for (i = 0; i < s->macroblock_height; i++)
2564
        render_slice(s, i);
2565
    STOP_TIMER("render_fragments")}
2566 d86053a4 Mike Melanson
2567 220a6f40 Michael Niedermayer
    {START_TIMER
2568 72053728 Michael Niedermayer
    apply_loop_filter(s);
2569 220a6f40 Michael Niedermayer
    STOP_TIMER("apply_loop_filter")}
2570 892fc83e Mike Melanson
#if KEYFRAMES_ONLY
2571
}
2572
#endif
2573
2574 d86053a4 Mike Melanson
    *data_size=sizeof(AVFrame);
2575
    *(AVFrame*)data= s->current_frame;
2576
2577 44ae98dd Mike Melanson
    /* release the last frame, if it is allocated and if it is not the
2578
     * golden frame */
2579
    if ((s->last_frame.data[0]) &&
2580
        (s->last_frame.data[0] != s->golden_frame.data[0]))
2581
        avctx->release_buffer(avctx, &s->last_frame);
2582 d86053a4 Mike Melanson
2583 61873c4a Mike Melanson
    /* shuffle frames (last = current) */
2584
    memcpy(&s->last_frame, &s->current_frame, sizeof(AVFrame));
2585 8e39d4a7 Michael Niedermayer
    s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
2586 d86053a4 Mike Melanson
2587
    return buf_size;
2588
}
2589
2590
/*
2591
 * This is the ffmpeg/libavcodec API module cleanup function.
2592
 */
2593
static int vp3_decode_end(AVCodecContext *avctx)
2594
{
2595
    Vp3DecodeContext *s = avctx->priv_data;
2596
2597
    av_free(s->all_fragments);
2598 a2df5a50 Michael Niedermayer
    av_free(s->coeffs);
2599 d86053a4 Mike Melanson
    av_free(s->coded_fragment_list);
2600
    av_free(s->superblock_fragments);
2601
    av_free(s->superblock_macroblocks);
2602
    av_free(s->macroblock_fragments);
2603 96a7e73b Mike Melanson
    av_free(s->macroblock_coding);
2604 115329f1 Diego Biurrun
2605 d86053a4 Mike Melanson
    /* release all frames */
2606 8e39d4a7 Michael Niedermayer
    if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
2607 892fc83e Mike Melanson
        avctx->release_buffer(avctx, &s->golden_frame);
2608
    if (s->last_frame.data[0])
2609
        avctx->release_buffer(avctx, &s->last_frame);
2610
    /* no need to release the current_frame since it will always be pointing
2611
     * to the same frame as either the golden or last frame */
2612 d86053a4 Mike Melanson
2613
    return 0;
2614
}
2615
2616 39922395 Mike Melanson
static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2617
{
2618
    Vp3DecodeContext *s = avctx->priv_data;
2619
2620
    if (get_bits(gb, 1)) {
2621
        int token;
2622
        if (s->entries >= 32) { /* overflow */
2623
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2624
            return -1;
2625
        }
2626
        token = get_bits(gb, 5);
2627
        //av_log(avctx, AV_LOG_DEBUG, "hti %d hbits %x token %d entry : %d size %d\n", s->hti, s->hbits, token, s->entries, s->huff_code_size);
2628
        s->huffman_table[s->hti][token][0] = s->hbits;
2629
        s->huffman_table[s->hti][token][1] = s->huff_code_size;
2630
        s->entries++;
2631
    }
2632
    else {
2633
        if (s->huff_code_size >= 32) {/* overflow */
2634
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2635
            return -1;
2636
        }
2637
        s->huff_code_size++;
2638
        s->hbits <<= 1;
2639
        read_huffman_tree(avctx, gb);
2640
        s->hbits |= 1;
2641
        read_huffman_tree(avctx, gb);
2642
        s->hbits >>= 1;
2643
        s->huff_code_size--;
2644
    }
2645
    return 0;
2646
}
2647
2648 f44ee2c3 Alex Beregszaszi
static int theora_decode_header(AVCodecContext *avctx, GetBitContext gb)
2649
{
2650
    Vp3DecodeContext *s = avctx->priv_data;
2651 9a7ad925 Alex Beregszaszi
    int major, minor, micro;
2652
2653
    major = get_bits(&gb, 8); /* version major */
2654
    minor = get_bits(&gb, 8); /* version minor */
2655
    micro = get_bits(&gb, 8); /* version micro */
2656
    av_log(avctx, AV_LOG_INFO, "Theora bitstream version %d.%d.%d\n",
2657 bb270c08 Diego Biurrun
        major, minor, micro);
2658 9a7ad925 Alex Beregszaszi
2659 105c3d25 Alex Beregszaszi
    /* FIXME: endianess? */
2660
    s->theora = (major << 16) | (minor << 8) | micro;
2661
2662 ba7ee4a4 Matthieu Castet
    /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
2663 9a7ad925 Alex Beregszaszi
    /* but previous versions have the image flipped relative to vp3 */
2664 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2665 9a7ad925 Alex Beregszaszi
    {
2666 bb270c08 Diego Biurrun
        s->flipped_image = 1;
2667 9a7ad925 Alex Beregszaszi
        av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2668
    }
2669 f44ee2c3 Alex Beregszaszi
2670
    s->width = get_bits(&gb, 16) << 4;
2671
    s->height = get_bits(&gb, 16) << 4;
2672 115329f1 Diego Biurrun
2673 0ecca7a4 Michael Niedermayer
    if(avcodec_check_dimensions(avctx, s->width, s->height)){
2674 7146d2c2 Alex Beregszaszi
        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
2675 0ecca7a4 Michael Niedermayer
        s->width= s->height= 0;
2676
        return -1;
2677
    }
2678 7146d2c2 Alex Beregszaszi
2679
    if (s->theora >= 0x030400)
2680
    {
2681 bb270c08 Diego Biurrun
        skip_bits(&gb, 32); /* total number of superblocks in a frame */
2682
        // fixme, the next field is 36bits long
2683
        skip_bits(&gb, 32); /* total number of blocks in a frame */
2684
        skip_bits(&gb, 4); /* total number of blocks in a frame */
2685
        skip_bits(&gb, 32); /* total number of macroblocks in a frame */
2686
2687
        skip_bits(&gb, 24); /* frame width */
2688
        skip_bits(&gb, 24); /* frame height */
2689 7146d2c2 Alex Beregszaszi
    }
2690
    else
2691
    {
2692 bb270c08 Diego Biurrun
        skip_bits(&gb, 24); /* frame width */
2693
        skip_bits(&gb, 24); /* frame height */
2694 7146d2c2 Alex Beregszaszi
    }
2695 f44ee2c3 Alex Beregszaszi
2696
    skip_bits(&gb, 8); /* offset x */
2697
    skip_bits(&gb, 8); /* offset y */
2698
2699
    skip_bits(&gb, 32); /* fps numerator */
2700
    skip_bits(&gb, 32); /* fps denumerator */
2701
    skip_bits(&gb, 24); /* aspect numerator */
2702
    skip_bits(&gb, 24); /* aspect denumerator */
2703 115329f1 Diego Biurrun
2704 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2705 bb270c08 Diego Biurrun
        skip_bits(&gb, 5); /* keyframe frequency force */
2706 f44ee2c3 Alex Beregszaszi
    skip_bits(&gb, 8); /* colorspace */
2707 7146d2c2 Alex Beregszaszi
    if (s->theora >= 0x030400)
2708 bb270c08 Diego Biurrun
        skip_bits(&gb, 2); /* pixel format: 420,res,422,444 */
2709 f44ee2c3 Alex Beregszaszi
    skip_bits(&gb, 24); /* bitrate */
2710
2711 7146d2c2 Alex Beregszaszi
    skip_bits(&gb, 6); /* quality hint */
2712 115329f1 Diego Biurrun
2713 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2714 105c3d25 Alex Beregszaszi
    {
2715 bb270c08 Diego Biurrun
        skip_bits(&gb, 5); /* keyframe frequency force */
2716 115329f1 Diego Biurrun
2717 bb270c08 Diego Biurrun
        if (s->theora < 0x030400)
2718
            skip_bits(&gb, 5); /* spare bits */
2719 105c3d25 Alex Beregszaszi
    }
2720 115329f1 Diego Biurrun
2721 f44ee2c3 Alex Beregszaszi
//    align_get_bits(&gb);
2722 115329f1 Diego Biurrun
2723 f44ee2c3 Alex Beregszaszi
    avctx->width = s->width;
2724
    avctx->height = s->height;
2725
2726
    return 0;
2727
}
2728
2729 7146d2c2 Alex Beregszaszi
static inline int theora_get_32bit(GetBitContext gb)
2730 91381201 Alex Beregszaszi
{
2731 7146d2c2 Alex Beregszaszi
    int ret = get_bits(&gb, 8);
2732
    ret += get_bits(&gb, 8) << 8;
2733
    ret += get_bits(&gb, 8) << 16;
2734
    ret += get_bits(&gb, 8) << 24;
2735 115329f1 Diego Biurrun
2736 7146d2c2 Alex Beregszaszi
    return ret;
2737
}
2738 91381201 Alex Beregszaszi
2739 f44ee2c3 Alex Beregszaszi
static int theora_decode_tables(AVCodecContext *avctx, GetBitContext gb)
2740
{
2741
    Vp3DecodeContext *s = avctx->priv_data;
2742 2da2ba03 Matthieu Castet
    int i, n, matrices;
2743 ba7ee4a4 Matthieu Castet
2744
    if (s->theora >= 0x030200) {
2745
        n = get_bits(&gb, 3);
2746 9c7154c7 Mike Melanson
        /* loop filter limit values table */
2747 ba7ee4a4 Matthieu Castet
        for (i = 0; i < 64; i++)
2748 9c7154c7 Mike Melanson
            s->filter_limit_values[i] = get_bits(&gb, n);
2749 ba7ee4a4 Matthieu Castet
    }
2750 115329f1 Diego Biurrun
2751 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2752
        n = get_bits(&gb, 4) + 1;
2753
    else
2754
        n = 16;
2755 f44ee2c3 Alex Beregszaszi
    /* quality threshold table */
2756
    for (i = 0; i < 64; i++)
2757 bb270c08 Diego Biurrun
        s->coded_ac_scale_factor[i] = get_bits(&gb, n);
2758 f44ee2c3 Alex Beregszaszi
2759 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2760
        n = get_bits(&gb, 4) + 1;
2761
    else
2762
        n = 16;
2763 f44ee2c3 Alex Beregszaszi
    /* dc scale factor table */
2764
    for (i = 0; i < 64; i++)
2765 bb270c08 Diego Biurrun
        s->coded_dc_scale_factor[i] = get_bits(&gb, n);
2766 f44ee2c3 Alex Beregszaszi
2767 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2768 2da2ba03 Matthieu Castet
        matrices = get_bits(&gb, 9) + 1;
2769 ba7ee4a4 Matthieu Castet
    else
2770 2da2ba03 Matthieu Castet
        matrices = 3;
2771
    if (matrices != 3) {
2772
        av_log(avctx,AV_LOG_ERROR, "unsupported matrices: %d\n", matrices);
2773
//        return -1;
2774 ba7ee4a4 Matthieu Castet
    }
2775 f44ee2c3 Alex Beregszaszi
    /* y coeffs */
2776
    for (i = 0; i < 64; i++)
2777 bb270c08 Diego Biurrun
        s->coded_intra_y_dequant[i] = get_bits(&gb, 8);
2778 f44ee2c3 Alex Beregszaszi
2779
    /* uv coeffs */
2780
    for (i = 0; i < 64; i++)
2781 bb270c08 Diego Biurrun
        s->coded_intra_c_dequant[i] = get_bits(&gb, 8);
2782 f44ee2c3 Alex Beregszaszi
2783
    /* inter coeffs */
2784
    for (i = 0; i < 64; i++)
2785 bb270c08 Diego Biurrun
        s->coded_inter_dequant[i] = get_bits(&gb, 8);
2786 3c3f113e Alex Beregszaszi
2787 2da2ba03 Matthieu Castet
    /* skip unknown matrices */
2788
    n = matrices - 3;
2789
    while(n--)
2790 bb270c08 Diego Biurrun
        for (i = 0; i < 64; i++)
2791
            skip_bits(&gb, 8);
2792 2da2ba03 Matthieu Castet
2793 39922395 Mike Melanson
    for (i = 0; i <= 1; i++) {
2794
        for (n = 0; n <= 2; n++) {
2795
            int newqr;
2796
            if (i > 0 || n > 0)
2797
                newqr = get_bits(&gb, 1);
2798
            else
2799
                newqr = 1;
2800
            if (!newqr) {
2801
                if (i > 0)
2802
                    get_bits(&gb, 1);
2803
            }
2804
            else {
2805
                int qi = 0;
2806 2da2ba03 Matthieu Castet
                skip_bits(&gb, av_log2(matrices-1)+1);
2807 39922395 Mike Melanson
                while (qi < 63) {
2808
                    qi += get_bits(&gb, av_log2(63-qi)+1) + 1;
2809 2da2ba03 Matthieu Castet
                    skip_bits(&gb, av_log2(matrices-1)+1);
2810 39922395 Mike Melanson
                }
2811 2da2ba03 Matthieu Castet
                if (qi > 63) {
2812 7146d2c2 Alex Beregszaszi
                    av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2813 bb270c08 Diego Biurrun
                    return -1;
2814
                }
2815 39922395 Mike Melanson
            }
2816
        }
2817
    }
2818
2819 2da2ba03 Matthieu Castet
    /* Huffman tables */
2820 39922395 Mike Melanson
    for (s->hti = 0; s->hti < 80; s->hti++) {
2821
        s->entries = 0;
2822
        s->huff_code_size = 1;
2823
        if (!get_bits(&gb, 1)) {
2824
            s->hbits = 0;
2825
            read_huffman_tree(avctx, &gb);
2826
            s->hbits = 1;
2827
            read_huffman_tree(avctx, &gb);
2828
        }
2829
    }
2830 115329f1 Diego Biurrun
2831 f44ee2c3 Alex Beregszaszi
    s->theora_tables = 1;
2832 115329f1 Diego Biurrun
2833 f44ee2c3 Alex Beregszaszi
    return 0;
2834
}
2835
2836
static int theora_decode_init(AVCodecContext *avctx)
2837
{
2838
    Vp3DecodeContext *s = avctx->priv_data;
2839
    GetBitContext gb;
2840
    int ptype;
2841 ee89b2b9 Michael Niedermayer
    uint8_t *p= avctx->extradata;
2842
    int op_bytes, i;
2843