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/*
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 * Copyright (C) 2003-2004 the ffmpeg project
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 FFmpeg; 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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 * @file libavcodec/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://wiki.multimedia.cx/index.php?title=On2_VP3
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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 "avcodec.h"
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#include "dsputil.h"
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#include "get_bits.h"
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#include "vp3data.h"
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#include "xiph.h"
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#define FRAGMENT_PIXELS 8
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static av_cold int vp3_decode_end(AVCodecContext *avctx);
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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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    int8_t motion_x;
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    int8_t motion_y;
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    uint8_t qpi;
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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 const int ModeAlphabet[6][CODING_MODE_COUNT] =
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{
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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 qps[3];
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    int nqps;
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    int last_qps[3];
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    int superblock_count;
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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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    uint8_t *coeff_counts;
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    Coeff *coeffs;
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    Coeff *next_coeff;
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    int fragment_start[3];
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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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    uint8_t base_matrix[384][64];
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    uint8_t qr_count[2][3];
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    uint8_t qr_size [2][3][64];
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    uint16_t qr_base[2][3][64];
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    /* this is a list of indexes 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_initialized;
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    /* track which fragments have already been decoded; called 'fast'
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     * because this data structure avoids having to iterate through every
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     * fragment in coded_fragment_list; once a fragment has been fully
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     * decoded, it is removed from this list */
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    int *fast_fragment_list;
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    int fragment_list_y_head;
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    int fragment_list_c_head;
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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, qmat[3][2][3][64]);     //<qmat[qpi][is_inter][plane]
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    /* This table contains superblock_count * 16 entries. Each set of 16
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     * numbers corresponds to the fragment indexes 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 indexes 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 indexes 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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    int8_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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    uint8_t filter_limit_values[64];
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    DECLARE_ALIGNED_8(int, bounding_values_array[256+2]);
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} Vp3DecodeContext;
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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_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 mapping_index = 0;
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    int current_macroblock;
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    int c_fragment;
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    static const 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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    static const 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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    static const signed char travel_width_mb[4] = {
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         1,  0,  1,  0
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    };
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    static const signed char travel_height_mb[4] = {
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         0,  1,  0, -1
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    };
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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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        /* 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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            /* 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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            /* the first operation for this variable is to advance by 1 */
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            current_fragment = s->fragment_start[1] - 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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            /* the first operation for this variable is to advance by 1 */
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            current_fragment = s->fragment_start[2] - 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 += travel_width[j] + right_edge * travel_height[j];
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            current_width += travel_width[j];
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            current_height += travel_height[j];
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            /* check if the fragment is in bounds */
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            if ((current_width < right_edge) &&
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                (current_height < bottom_edge)) {
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                s->superblock_fragments[mapping_index] = current_fragment;
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            } else {
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                s->superblock_fragments[mapping_index] = -1;
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            }
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            mapping_index++;
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        }
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    }
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    /* initialize the superblock <-> macroblock mapping; iterate through
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     * all of the Y plane superblocks to build this mapping */
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    right_edge = s->macroblock_width;
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    bottom_edge = s->macroblock_height;
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    current_width = -1;
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    current_height = 0;
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    superblock_row_inc = s->macroblock_width -
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        (s->y_superblock_width * 2 - s->macroblock_width);
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    mapping_index = 0;
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    current_macroblock = -1;
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    for (i = 0; i < s->u_superblock_start; i++) {
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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 += 2;
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            /* macroblock is now at the start of a new superblock row */
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            current_macroblock += superblock_row_inc;
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        }
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        /* iterate through each potential macroblock in the superblock */
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        for (j = 0; j < 4; j++) {
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            current_macroblock += hilbert_walk_mb[j];
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            current_width += travel_width_mb[j];
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            current_height += travel_height_mb[j];
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            /* check if the macroblock is in bounds */
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            if ((current_width < right_edge) &&
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                (current_height < bottom_edge)) {
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                s->superblock_macroblocks[mapping_index] = current_macroblock;
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            } else {
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                s->superblock_macroblocks[mapping_index] = -1;
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            }
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            mapping_index++;
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        }
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    }
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    /* initialize the macroblock <-> fragment mapping */
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    current_fragment = 0;
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    current_macroblock = 0;
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    mapping_index = 0;
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    for (i = 0; i < s->fragment_height; i += 2) {
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        for (j = 0; j < s->fragment_width; j += 2) {
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            s->all_fragments[current_fragment].macroblock = current_macroblock;
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            s->macroblock_fragments[mapping_index++] = current_fragment;
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            if (j + 1 < s->fragment_width) {
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                s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
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                s->macroblock_fragments[mapping_index++] = current_fragment + 1;
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            } else
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                s->macroblock_fragments[mapping_index++] = -1;
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            if (i + 1 < s->fragment_height) {
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                s->all_fragments[current_fragment + s->fragment_width].macroblock =
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                    current_macroblock;
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                s->macroblock_fragments[mapping_index++] =
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                    current_fragment + s->fragment_width;
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            } else
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                s->macroblock_fragments[mapping_index++] = -1;
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            if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
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                s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
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                    current_macroblock;
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                s->macroblock_fragments[mapping_index++] =
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                    current_fragment + s->fragment_width + 1;
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            } else
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                s->macroblock_fragments[mapping_index++] = -1;
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            /* C planes */
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            c_fragment = s->fragment_start[1] +
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                (i * s->fragment_width / 4) + (j / 2);
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            s->all_fragments[c_fragment].macroblock = s->macroblock_count;
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            s->macroblock_fragments[mapping_index++] = c_fragment;
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            c_fragment = s->fragment_start[2] +
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                (i * s->fragment_width / 4) + (j / 2);
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            s->all_fragments[c_fragment].macroblock = s->macroblock_count;
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            s->macroblock_fragments[mapping_index++] = c_fragment;
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            if (j + 2 <= s->fragment_width)
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                current_fragment += 2;
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            else
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                current_fragment++;
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            current_macroblock++;
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        }
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        current_fragment += s->fragment_width;
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    }
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    return 0;  /* successful path out */
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}
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/*
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 * This function wipes out all of the fragment data.
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 */
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static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
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{
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    int i;
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    /* zero out all of the fragment information */
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    s->coded_fragment_list_index = 0;
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    for (i = 0; i < s->fragment_count; i++) {
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        s->coeff_counts[i] = 0;
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        s->all_fragments[i].motion_x = 127;
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        s->all_fragments[i].motion_y = 127;
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        s->all_fragments[i].next_coeff= NULL;
479 f2264fa5 David Conrad
        s->all_fragments[i].qpi = 0;
480 7beddb12 Michael Niedermayer
        s->coeffs[i].index=
481
        s->coeffs[i].coeff=0;
482
        s->coeffs[i].next= NULL;
483 d86053a4 Mike Melanson
    }
484
}
485
486
/*
487 f44b08a5 Mike Melanson
 * This function sets up the dequantization tables used for a particular
488 d86053a4 Mike Melanson
 * frame.
489
 */
490 f2264fa5 David Conrad
static void init_dequantizer(Vp3DecodeContext *s, int qpi)
491 d86053a4 Mike Melanson
{
492 f2264fa5 David Conrad
    int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
493
    int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
494 36c32bdd Diego Biurrun
    int i, plane, inter, qri, bmi, bmj, qistart;
495 d86053a4 Mike Melanson
496 ae1dd8e1 Michael Niedermayer
    for(inter=0; inter<2; inter++){
497
        for(plane=0; plane<3; plane++){
498
            int sum=0;
499
            for(qri=0; qri<s->qr_count[inter][plane]; qri++){
500
                sum+= s->qr_size[inter][plane][qri];
501 f2264fa5 David Conrad
                if(s->qps[qpi] <= sum)
502 ae1dd8e1 Michael Niedermayer
                    break;
503
            }
504
            qistart= sum - s->qr_size[inter][plane][qri];
505
            bmi= s->qr_base[inter][plane][qri  ];
506
            bmj= s->qr_base[inter][plane][qri+1];
507
            for(i=0; i<64; i++){
508 f2264fa5 David Conrad
                int coeff= (  2*(sum    -s->qps[qpi])*s->base_matrix[bmi][i]
509
                            - 2*(qistart-s->qps[qpi])*s->base_matrix[bmj][i]
510 ae1dd8e1 Michael Niedermayer
                            + s->qr_size[inter][plane][qri])
511
                           / (2*s->qr_size[inter][plane][qri]);
512
513 a14ab4e4 Michael Niedermayer
                int qmin= 8<<(inter + !i);
514 ae1dd8e1 Michael Niedermayer
                int qscale= i ? ac_scale_factor : dc_scale_factor;
515
516 f2264fa5 David Conrad
                s->qmat[qpi][inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
517 ae1dd8e1 Michael Niedermayer
            }
518 f2264fa5 David Conrad
            // all DC coefficients use the same quant so as not to interfere with DC prediction
519
            s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
520 ae1dd8e1 Michael Niedermayer
        }
521 d86053a4 Mike Melanson
    }
522 115329f1 Diego Biurrun
523 f2264fa5 David Conrad
    memset(s->qscale_table, (FFMAX(s->qmat[0][0][0][1], s->qmat[0][0][1][1])+8)/16, 512); //FIXME finetune
524 d86053a4 Mike Melanson
}
525
526
/*
527 f44b08a5 Mike Melanson
 * This function initializes the loop filter boundary limits if the frame's
528
 * quality index is different from the previous frame's.
529 7fa5f999 Reimar Döffinger
 *
530
 * The filter_limit_values may not be larger than 127.
531 f44b08a5 Mike Melanson
 */
532
static void init_loop_filter(Vp3DecodeContext *s)
533
{
534
    int *bounding_values= s->bounding_values_array+127;
535
    int filter_limit;
536
    int x;
537 7fa5f999 Reimar Döffinger
    int value;
538 f44b08a5 Mike Melanson
539 f2264fa5 David Conrad
    filter_limit = s->filter_limit_values[s->qps[0]];
540 f44b08a5 Mike Melanson
541
    /* set up the bounding values */
542
    memset(s->bounding_values_array, 0, 256 * sizeof(int));
543
    for (x = 0; x < filter_limit; x++) {
544
        bounding_values[-x] = -x;
545
        bounding_values[x] = x;
546
    }
547 7fa5f999 Reimar Döffinger
    for (x = value = filter_limit; x < 128 && value; x++, value--) {
548
        bounding_values[ x] =  value;
549
        bounding_values[-x] = -value;
550
    }
551
    if (value)
552
        bounding_values[128] = value;
553 357f45d9 David Conrad
    bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
554 f44b08a5 Mike Melanson
}
555
556
/*
557 115329f1 Diego Biurrun
 * This function unpacks all of the superblock/macroblock/fragment coding
558 d86053a4 Mike Melanson
 * information from the bitstream.
559
 */
560 892fc83e Mike Melanson
static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
561 d86053a4 Mike Melanson
{
562
    int bit = 0;
563
    int current_superblock = 0;
564
    int current_run = 0;
565
    int decode_fully_flags = 0;
566
    int decode_partial_blocks = 0;
567 22493ab9 Mike Melanson
    int first_c_fragment_seen;
568 d86053a4 Mike Melanson
569
    int i, j;
570
    int current_fragment;
571
572
    if (s->keyframe) {
573
        memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
574
575
    } else {
576
577
        /* unpack the list of partially-coded superblocks */
578 5fc32c27 Alex Beregszaszi
        bit = get_bits1(gb);
579 115329f1 Diego Biurrun
        /* toggle the bit because as soon as the first run length is
580 d86053a4 Mike Melanson
         * fetched the bit will be toggled again */
581
        bit ^= 1;
582
        while (current_superblock < s->superblock_count) {
583 b5da3635 Michael Niedermayer
            if (current_run-- == 0) {
584 d86053a4 Mike Melanson
                bit ^= 1;
585 115329f1 Diego Biurrun
                current_run = get_vlc2(gb,
586 b5da3635 Michael Niedermayer
                    s->superblock_run_length_vlc.table, 6, 2);
587
                if (current_run == 33)
588 d8278bab Mike Melanson
                    current_run += get_bits(gb, 12);
589 d86053a4 Mike Melanson
590
                /* if any of the superblocks are not partially coded, flag
591
                 * a boolean to decode the list of fully-coded superblocks */
592 642d7e84 Mike Melanson
                if (bit == 0) {
593 d86053a4 Mike Melanson
                    decode_fully_flags = 1;
594 642d7e84 Mike Melanson
                } else {
595 d86053a4 Mike Melanson
596 642d7e84 Mike Melanson
                    /* make a note of the fact that there are partially coded
597
                     * superblocks */
598
                    decode_partial_blocks = 1;
599
                }
600 d86053a4 Mike Melanson
            }
601 b5da3635 Michael Niedermayer
            s->superblock_coding[current_superblock++] = bit;
602 d86053a4 Mike Melanson
        }
603
604
        /* unpack the list of fully coded superblocks if any of the blocks were
605
         * not marked as partially coded in the previous step */
606
        if (decode_fully_flags) {
607
608
            current_superblock = 0;
609
            current_run = 0;
610 5fc32c27 Alex Beregszaszi
            bit = get_bits1(gb);
611 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
612 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
613
            bit ^= 1;
614
            while (current_superblock < s->superblock_count) {
615
616
                /* skip any superblocks already marked as partially coded */
617
                if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
618
619 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
620 d86053a4 Mike Melanson
                        bit ^= 1;
621 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
622 b5da3635 Michael Niedermayer
                            s->superblock_run_length_vlc.table, 6, 2);
623
                        if (current_run == 33)
624 d8278bab Mike Melanson
                            current_run += get_bits(gb, 12);
625 d86053a4 Mike Melanson
                    }
626 b5da3635 Michael Niedermayer
                    s->superblock_coding[current_superblock] = 2*bit;
627 d86053a4 Mike Melanson
                }
628
                current_superblock++;
629
            }
630
        }
631
632
        /* if there were partial blocks, initialize bitstream for
633
         * unpacking fragment codings */
634
        if (decode_partial_blocks) {
635
636
            current_run = 0;
637 5fc32c27 Alex Beregszaszi
            bit = get_bits1(gb);
638 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
639 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
640
            bit ^= 1;
641
        }
642
    }
643
644
    /* figure out which fragments are coded; iterate through each
645
     * superblock (all planes) */
646
    s->coded_fragment_list_index = 0;
647 7beddb12 Michael Niedermayer
    s->next_coeff= s->coeffs + s->fragment_count;
648 04331882 Mike Melanson
    s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
649
    s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
650 22493ab9 Mike Melanson
    first_c_fragment_seen = 0;
651 96a7e73b Mike Melanson
    memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
652 d86053a4 Mike Melanson
    for (i = 0; i < s->superblock_count; i++) {
653
654
        /* iterate through all 16 fragments in a superblock */
655
        for (j = 0; j < 16; j++) {
656
657
            /* if the fragment is in bounds, check its coding status */
658
            current_fragment = s->superblock_fragments[i * 16 + j];
659 892fc83e Mike Melanson
            if (current_fragment >= s->fragment_count) {
660 9b879566 Michel Bardiaux
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
661 892fc83e Mike Melanson
                    current_fragment, s->fragment_count);
662
                return 1;
663
            }
664 d86053a4 Mike Melanson
            if (current_fragment != -1) {
665
                if (s->superblock_coding[i] == SB_NOT_CODED) {
666
667
                    /* copy all the fragments from the prior frame */
668 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
669 d86053a4 Mike Melanson
                        MODE_COPY;
670
671
                } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
672
673
                    /* fragment may or may not be coded; this is the case
674
                     * that cares about the fragment coding runs */
675 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
676 d86053a4 Mike Melanson
                        bit ^= 1;
677 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
678 b5da3635 Michael Niedermayer
                            s->fragment_run_length_vlc.table, 5, 2);
679 d86053a4 Mike Melanson
                    }
680
681
                    if (bit) {
682 115329f1 Diego Biurrun
                        /* default mode; actual mode will be decoded in
683 22493ab9 Mike Melanson
                         * the next phase */
684 115329f1 Diego Biurrun
                        s->all_fragments[current_fragment].coding_method =
685 d86053a4 Mike Melanson
                            MODE_INTER_NO_MV;
686 7beddb12 Michael Niedermayer
                        s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
687 115329f1 Diego Biurrun
                        s->coded_fragment_list[s->coded_fragment_list_index] =
688 d86053a4 Mike Melanson
                            current_fragment;
689 1abbf64e Michael Niedermayer
                        if ((current_fragment >= s->fragment_start[1]) &&
690 22493ab9 Mike Melanson
                            (s->last_coded_y_fragment == -1) &&
691
                            (!first_c_fragment_seen)) {
692 04331882 Mike Melanson
                            s->first_coded_c_fragment = s->coded_fragment_list_index;
693
                            s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
694 22493ab9 Mike Melanson
                            first_c_fragment_seen = 1;
695 04331882 Mike Melanson
                        }
696
                        s->coded_fragment_list_index++;
697 96a7e73b Mike Melanson
                        s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
698 d86053a4 Mike Melanson
                    } else {
699
                        /* not coded; copy this fragment from the prior frame */
700
                        s->all_fragments[current_fragment].coding_method =
701
                            MODE_COPY;
702
                    }
703
704
                } else {
705
706
                    /* fragments are fully coded in this superblock; actual
707
                     * coding will be determined in next step */
708 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
709 d86053a4 Mike Melanson
                        MODE_INTER_NO_MV;
710 7beddb12 Michael Niedermayer
                    s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
711 115329f1 Diego Biurrun
                    s->coded_fragment_list[s->coded_fragment_list_index] =
712 d86053a4 Mike Melanson
                        current_fragment;
713 1abbf64e Michael Niedermayer
                    if ((current_fragment >= s->fragment_start[1]) &&
714 22493ab9 Mike Melanson
                        (s->last_coded_y_fragment == -1) &&
715
                        (!first_c_fragment_seen)) {
716 04331882 Mike Melanson
                        s->first_coded_c_fragment = s->coded_fragment_list_index;
717
                        s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
718 22493ab9 Mike Melanson
                        first_c_fragment_seen = 1;
719 04331882 Mike Melanson
                    }
720
                    s->coded_fragment_list_index++;
721 96a7e73b Mike Melanson
                    s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
722 d86053a4 Mike Melanson
                }
723
            }
724
        }
725
    }
726 04331882 Mike Melanson
727 22493ab9 Mike Melanson
    if (!first_c_fragment_seen)
728
        /* only Y fragments coded in this frame */
729 04331882 Mike Melanson
        s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
730 115329f1 Diego Biurrun
    else
731 642d7e84 Mike Melanson
        /* end the list of coded C fragments */
732 04331882 Mike Melanson
        s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
733 22493ab9 Mike Melanson
734 098523eb Mike Melanson
    for (i = 0; i < s->fragment_count - 1; i++) {
735
        s->fast_fragment_list[i] = i + 1;
736
    }
737
    s->fast_fragment_list[s->fragment_count - 1] = -1;
738
739
    if (s->last_coded_y_fragment == -1)
740
        s->fragment_list_y_head = -1;
741
    else {
742
        s->fragment_list_y_head = s->first_coded_y_fragment;
743
        s->fast_fragment_list[s->last_coded_y_fragment] = -1;
744
    }
745
746
    if (s->last_coded_c_fragment == -1)
747
        s->fragment_list_c_head = -1;
748
    else {
749
        s->fragment_list_c_head = s->first_coded_c_fragment;
750
        s->fast_fragment_list[s->last_coded_c_fragment] = -1;
751
    }
752
753 892fc83e Mike Melanson
    return 0;
754 d86053a4 Mike Melanson
}
755
756
/*
757
 * This function unpacks all the coding mode data for individual macroblocks
758
 * from the bitstream.
759
 */
760 892fc83e Mike Melanson
static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
761 d86053a4 Mike Melanson
{
762
    int i, j, k;
763
    int scheme;
764
    int current_macroblock;
765
    int current_fragment;
766
    int coding_mode;
767 e8e47435 Stefan Gehrer
    int custom_mode_alphabet[CODING_MODE_COUNT];
768 d86053a4 Mike Melanson
769
    if (s->keyframe) {
770
        for (i = 0; i < s->fragment_count; i++)
771
            s->all_fragments[i].coding_method = MODE_INTRA;
772
773
    } else {
774
775
        /* fetch the mode coding scheme for this frame */
776
        scheme = get_bits(gb, 3);
777
778
        /* is it a custom coding scheme? */
779
        if (scheme == 0) {
780
            for (i = 0; i < 8; i++)
781 2c823b3c Alex Converse
                custom_mode_alphabet[i] = MODE_INTER_NO_MV;
782
            for (i = 0; i < 8; i++)
783 e8e47435 Stefan Gehrer
                custom_mode_alphabet[get_bits(gb, 3)] = i;
784 d86053a4 Mike Melanson
        }
785
786
        /* iterate through all of the macroblocks that contain 1 or more
787
         * coded fragments */
788
        for (i = 0; i < s->u_superblock_start; i++) {
789
790
            for (j = 0; j < 4; j++) {
791
                current_macroblock = s->superblock_macroblocks[i * 4 + j];
792
                if ((current_macroblock == -1) ||
793 96a7e73b Mike Melanson
                    (s->macroblock_coding[current_macroblock] == MODE_COPY))
794 d86053a4 Mike Melanson
                    continue;
795 892fc83e Mike Melanson
                if (current_macroblock >= s->macroblock_count) {
796 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
797 892fc83e Mike Melanson
                        current_macroblock, s->macroblock_count);
798
                    return 1;
799
                }
800 d86053a4 Mike Melanson
801
                /* mode 7 means get 3 bits for each coding mode */
802
                if (scheme == 7)
803
                    coding_mode = get_bits(gb, 3);
804 e8e47435 Stefan Gehrer
                else if(scheme == 0)
805
                    coding_mode = custom_mode_alphabet
806
                        [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
807 d86053a4 Mike Melanson
                else
808 e8e47435 Stefan Gehrer
                    coding_mode = ModeAlphabet[scheme-1]
809 0ad72bdd Mike Melanson
                        [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
810 d86053a4 Mike Melanson
811 96a7e73b Mike Melanson
                s->macroblock_coding[current_macroblock] = coding_mode;
812 d86053a4 Mike Melanson
                for (k = 0; k < 6; k++) {
813 115329f1 Diego Biurrun
                    current_fragment =
814 d86053a4 Mike Melanson
                        s->macroblock_fragments[current_macroblock * 6 + k];
815 892fc83e Mike Melanson
                    if (current_fragment == -1)
816
                        continue;
817
                    if (current_fragment >= s->fragment_count) {
818 9b879566 Michel Bardiaux
                        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
819 892fc83e Mike Melanson
                            current_fragment, s->fragment_count);
820
                        return 1;
821
                    }
822 115329f1 Diego Biurrun
                    if (s->all_fragments[current_fragment].coding_method !=
823 d86053a4 Mike Melanson
                        MODE_COPY)
824
                        s->all_fragments[current_fragment].coding_method =
825
                            coding_mode;
826
                }
827
            }
828
        }
829
    }
830 892fc83e Mike Melanson
831
    return 0;
832 44ae98dd Mike Melanson
}
833
834
/*
835 d86053a4 Mike Melanson
 * This function unpacks all the motion vectors for the individual
836
 * macroblocks from the bitstream.
837
 */
838 892fc83e Mike Melanson
static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
839 d86053a4 Mike Melanson
{
840 feaf1a73 Aurelien Jacobs
    int i, j, k, l;
841 d86053a4 Mike Melanson
    int coding_mode;
842
    int motion_x[6];
843
    int motion_y[6];
844
    int last_motion_x = 0;
845
    int last_motion_y = 0;
846
    int prior_last_motion_x = 0;
847
    int prior_last_motion_y = 0;
848
    int current_macroblock;
849
    int current_fragment;
850
851 6599e2a7 David Conrad
    if (s->keyframe)
852 6298f49f David Conrad
        return 0;
853 10f38380 David Conrad
854 1ae4518d David Conrad
    memset(motion_x, 0, 6 * sizeof(int));
855
    memset(motion_y, 0, 6 * sizeof(int));
856 d86053a4 Mike Melanson
857 1ae4518d David Conrad
    /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
858
    coding_mode = get_bits1(gb);
859 d86053a4 Mike Melanson
860 1ae4518d David Conrad
    /* iterate through all of the macroblocks that contain 1 or more
861
     * coded fragments */
862
    for (i = 0; i < s->u_superblock_start; i++) {
863 d86053a4 Mike Melanson
864 1ae4518d David Conrad
        for (j = 0; j < 4; j++) {
865
            current_macroblock = s->superblock_macroblocks[i * 4 + j];
866
            if ((current_macroblock == -1) ||
867
                (s->macroblock_coding[current_macroblock] == MODE_COPY))
868
                continue;
869
            if (current_macroblock >= s->macroblock_count) {
870
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
871
                    current_macroblock, s->macroblock_count);
872
                return 1;
873
            }
874 d86053a4 Mike Melanson
875 1ae4518d David Conrad
            current_fragment = s->macroblock_fragments[current_macroblock * 6];
876
            if (current_fragment >= s->fragment_count) {
877
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
878
                    current_fragment, s->fragment_count);
879
                return 1;
880
            }
881
            switch (s->macroblock_coding[current_macroblock]) {
882
883
            case MODE_INTER_PLUS_MV:
884
            case MODE_GOLDEN_MV:
885
                /* all 6 fragments use the same motion vector */
886
                if (coding_mode == 0) {
887
                    motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
888
                    motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
889
                } else {
890
                    motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
891
                    motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
892 892fc83e Mike Melanson
                }
893 7f9926a4 Mike Melanson
894 1ae4518d David Conrad
                for (k = 1; k < 6; k++) {
895
                    motion_x[k] = motion_x[0];
896
                    motion_y[k] = motion_y[0];
897
                }
898 d86053a4 Mike Melanson
899 1ae4518d David Conrad
                /* vector maintenance, only on MODE_INTER_PLUS_MV */
900
                if (s->macroblock_coding[current_macroblock] ==
901
                    MODE_INTER_PLUS_MV) {
902 e32e2d56 Aurelien Jacobs
                    prior_last_motion_x = last_motion_x;
903
                    prior_last_motion_y = last_motion_y;
904 1ae4518d David Conrad
                    last_motion_x = motion_x[0];
905
                    last_motion_y = motion_y[0];
906
                }
907
                break;
908
909
            case MODE_INTER_FOURMV:
910
                /* vector maintenance */
911
                prior_last_motion_x = last_motion_x;
912
                prior_last_motion_y = last_motion_y;
913
914
                /* fetch 4 vectors from the bitstream, one for each
915
                 * Y fragment, then average for the C fragment vectors */
916
                motion_x[4] = motion_y[4] = 0;
917
                for (k = 0; k < 4; k++) {
918
                    for (l = 0; l < s->coded_fragment_list_index; l++)
919
                        if (s->coded_fragment_list[l] == s->macroblock_fragments[6*current_macroblock + k])
920
                            break;
921
                    if (l < s->coded_fragment_list_index) {
922
                        if (coding_mode == 0) {
923
                            motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
924
                            motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
925 feaf1a73 Aurelien Jacobs
                        } else {
926 1ae4518d David Conrad
                            motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
927
                            motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
928 feaf1a73 Aurelien Jacobs
                        }
929 1ae4518d David Conrad
                        last_motion_x = motion_x[k];
930
                        last_motion_y = motion_y[k];
931
                    } else {
932
                        motion_x[k] = 0;
933
                        motion_y[k] = 0;
934 d86053a4 Mike Melanson
                    }
935 1ae4518d David Conrad
                    motion_x[4] += motion_x[k];
936
                    motion_y[4] += motion_y[k];
937
                }
938 d86053a4 Mike Melanson
939 1ae4518d David Conrad
                motion_x[5]=
940
                motion_x[4]= RSHIFT(motion_x[4], 2);
941
                motion_y[5]=
942
                motion_y[4]= RSHIFT(motion_y[4], 2);
943
                break;
944
945
            case MODE_INTER_LAST_MV:
946
                /* all 6 fragments use the last motion vector */
947
                motion_x[0] = last_motion_x;
948
                motion_y[0] = last_motion_y;
949
                for (k = 1; k < 6; k++) {
950
                    motion_x[k] = motion_x[0];
951
                    motion_y[k] = motion_y[0];
952
                }
953 d86053a4 Mike Melanson
954 1ae4518d David Conrad
                /* no vector maintenance (last vector remains the
955
                 * last vector) */
956
                break;
957
958
            case MODE_INTER_PRIOR_LAST:
959
                /* all 6 fragments use the motion vector prior to the
960
                 * last motion vector */
961
                motion_x[0] = prior_last_motion_x;
962
                motion_y[0] = prior_last_motion_y;
963
                for (k = 1; k < 6; k++) {
964
                    motion_x[k] = motion_x[0];
965
                    motion_y[k] = motion_y[0];
966
                }
967 d86053a4 Mike Melanson
968 1ae4518d David Conrad
                /* vector maintenance */
969
                prior_last_motion_x = last_motion_x;
970
                prior_last_motion_y = last_motion_y;
971
                last_motion_x = motion_x[0];
972
                last_motion_y = motion_y[0];
973
                break;
974 44ae98dd Mike Melanson
975 1ae4518d David Conrad
            default:
976
                /* covers intra, inter without MV, golden without MV */
977
                memset(motion_x, 0, 6 * sizeof(int));
978
                memset(motion_y, 0, 6 * sizeof(int));
979 44ae98dd Mike Melanson
980 1ae4518d David Conrad
                /* no vector maintenance */
981
                break;
982
            }
983 d86053a4 Mike Melanson
984 1ae4518d David Conrad
            /* assign the motion vectors to the correct fragments */
985
            for (k = 0; k < 6; k++) {
986
                current_fragment =
987
                    s->macroblock_fragments[current_macroblock * 6 + k];
988
                if (current_fragment == -1)
989
                    continue;
990
                if (current_fragment >= s->fragment_count) {
991
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
992
                        current_fragment, s->fragment_count);
993
                    return 1;
994 d86053a4 Mike Melanson
                }
995 1ae4518d David Conrad
                s->all_fragments[current_fragment].motion_x = motion_x[k];
996
                s->all_fragments[current_fragment].motion_y = motion_y[k];
997 d86053a4 Mike Melanson
            }
998
        }
999 1ae4518d David Conrad
    }
1000 892fc83e Mike Melanson
1001
    return 0;
1002 d86053a4 Mike Melanson
}
1003
1004 f2264fa5 David Conrad
static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
1005
{
1006
    int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
1007
    int num_blocks = s->coded_fragment_list_index;
1008
1009
    for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
1010
        i = blocks_decoded = num_blocks_at_qpi = 0;
1011
1012
        bit = get_bits1(gb);
1013
1014
        do {
1015
            run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
1016
            if (run_length == 34)
1017
                run_length += get_bits(gb, 12);
1018
            blocks_decoded += run_length;
1019
1020
            if (!bit)
1021
                num_blocks_at_qpi += run_length;
1022
1023
            for (j = 0; j < run_length; i++) {
1024 310afddf Google Chrome
                if (i >= s->coded_fragment_list_index)
1025 f2264fa5 David Conrad
                    return -1;
1026
1027
                if (s->all_fragments[s->coded_fragment_list[i]].qpi == qpi) {
1028
                    s->all_fragments[s->coded_fragment_list[i]].qpi += bit;
1029
                    j++;
1030
                }
1031
            }
1032
1033
            if (run_length == 4129)
1034
                bit = get_bits1(gb);
1035
            else
1036
                bit ^= 1;
1037
        } while (blocks_decoded < num_blocks);
1038
1039
        num_blocks -= num_blocks_at_qpi;
1040
    }
1041
1042
    return 0;
1043
}
1044
1045 115329f1 Diego Biurrun
/*
1046 d86053a4 Mike Melanson
 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1047
 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1048
 * data. This function unpacks all the VLCs for either the Y plane or both
1049
 * C planes, and is called for DC coefficients or different AC coefficient
1050
 * levels (since different coefficient types require different VLC tables.
1051
 *
1052
 * This function returns a residual eob run. E.g, if a particular token gave
1053
 * instructions to EOB the next 5 fragments and there were only 2 fragments
1054
 * left in the current fragment range, 3 would be returned so that it could
1055
 * be passed into the next call to this same function.
1056
 */
1057
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1058
                        VLC *table, int coeff_index,
1059 098523eb Mike Melanson
                        int y_plane,
1060 d86053a4 Mike Melanson
                        int eob_run)
1061
{
1062
    int i;
1063
    int token;
1064 d3076955 Mike Melanson
    int zero_run = 0;
1065
    DCTELEM coeff = 0;
1066 d86053a4 Mike Melanson
    Vp3Fragment *fragment;
1067 d3076955 Mike Melanson
    int bits_to_get;
1068 098523eb Mike Melanson
    int next_fragment;
1069
    int previous_fragment;
1070
    int fragment_num;
1071
    int *list_head;
1072 d86053a4 Mike Melanson
1073 ee3d7f58 Mike Melanson
    /* local references to structure members to avoid repeated deferences */
1074
    uint8_t *perm= s->scantable.permutated;
1075
    int *coded_fragment_list = s->coded_fragment_list;
1076
    Vp3Fragment *all_fragments = s->all_fragments;
1077
    uint8_t *coeff_counts = s->coeff_counts;
1078
    VLC_TYPE (*vlc_table)[2] = table->table;
1079 098523eb Mike Melanson
    int *fast_fragment_list = s->fast_fragment_list;
1080 ee3d7f58 Mike Melanson
1081 098523eb Mike Melanson
    if (y_plane) {
1082
        next_fragment = s->fragment_list_y_head;
1083
        list_head = &s->fragment_list_y_head;
1084
    } else {
1085
        next_fragment = s->fragment_list_c_head;
1086
        list_head = &s->fragment_list_c_head;
1087 74c0ac12 Mike Melanson
    }
1088
1089 098523eb Mike Melanson
    i = next_fragment;
1090
    previous_fragment = -1;  /* this indicates that the previous fragment is actually the list head */
1091
    while (i != -1) {
1092
        fragment_num = coded_fragment_list[i];
1093 d86053a4 Mike Melanson
1094 098523eb Mike Melanson
        if (coeff_counts[fragment_num] > coeff_index) {
1095
            previous_fragment = i;
1096
            i = fast_fragment_list[i];
1097 d86053a4 Mike Melanson
            continue;
1098 098523eb Mike Melanson
        }
1099 ee3d7f58 Mike Melanson
        fragment = &all_fragments[fragment_num];
1100 d86053a4 Mike Melanson
1101
        if (!eob_run) {
1102
            /* decode a VLC into a token */
1103 ee3d7f58 Mike Melanson
            token = get_vlc2(gb, vlc_table, 5, 3);
1104 d86053a4 Mike Melanson
            /* use the token to get a zero run, a coefficient, and an eob run */
1105 d3076955 Mike Melanson
            if (token <= 6) {
1106
                eob_run = eob_run_base[token];
1107
                if (eob_run_get_bits[token])
1108
                    eob_run += get_bits(gb, eob_run_get_bits[token]);
1109
                coeff = zero_run = 0;
1110
            } else {
1111
                bits_to_get = coeff_get_bits[token];
1112 428984b0 Mike Melanson
                if (bits_to_get)
1113
                    bits_to_get = get_bits(gb, bits_to_get);
1114
                coeff = coeff_tables[token][bits_to_get];
1115 d3076955 Mike Melanson
1116
                zero_run = zero_run_base[token];
1117
                if (zero_run_get_bits[token])
1118
                    zero_run += get_bits(gb, zero_run_get_bits[token]);
1119
            }
1120 d86053a4 Mike Melanson
        }
1121
1122
        if (!eob_run) {
1123 ee3d7f58 Mike Melanson
            coeff_counts[fragment_num] += zero_run;
1124
            if (coeff_counts[fragment_num] < 64){
1125 7beddb12 Michael Niedermayer
                fragment->next_coeff->coeff= coeff;
1126 ee3d7f58 Mike Melanson
                fragment->next_coeff->index= perm[coeff_counts[fragment_num]++]; //FIXME perm here already?
1127 7beddb12 Michael Niedermayer
                fragment->next_coeff->next= s->next_coeff;
1128
                s->next_coeff->next=NULL;
1129
                fragment->next_coeff= s->next_coeff++;
1130
            }
1131 098523eb Mike Melanson
            /* previous fragment is now this fragment */
1132
            previous_fragment = i;
1133 d86053a4 Mike Melanson
        } else {
1134 ee3d7f58 Mike Melanson
            coeff_counts[fragment_num] |= 128;
1135 d86053a4 Mike Melanson
            eob_run--;
1136 098523eb Mike Melanson
            /* remove this fragment from the list */
1137
            if (previous_fragment != -1)
1138
                fast_fragment_list[previous_fragment] = fast_fragment_list[i];
1139
            else
1140
                *list_head = fast_fragment_list[i];
1141
            /* previous fragment remains unchanged */
1142 d86053a4 Mike Melanson
        }
1143 098523eb Mike Melanson
1144
        i = fast_fragment_list[i];
1145 d86053a4 Mike Melanson
    }
1146
1147
    return eob_run;
1148
}
1149
1150 138fe832 Mike Melanson
static void reverse_dc_prediction(Vp3DecodeContext *s,
1151
                                  int first_fragment,
1152
                                  int fragment_width,
1153
                                  int fragment_height);
1154 d86053a4 Mike Melanson
/*
1155
 * This function unpacks all of the DCT coefficient data from the
1156
 * bitstream.
1157
 */
1158 892fc83e Mike Melanson
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1159 d86053a4 Mike Melanson
{
1160
    int i;
1161
    int dc_y_table;
1162
    int dc_c_table;
1163
    int ac_y_table;
1164
    int ac_c_table;
1165
    int residual_eob_run = 0;
1166 9d8bb031 Mike Melanson
    VLC *y_tables[64];
1167
    VLC *c_tables[64];
1168 d86053a4 Mike Melanson
1169 f4433de9 Diego Biurrun
    /* fetch the DC table indexes */
1170 d86053a4 Mike Melanson
    dc_y_table = get_bits(gb, 4);
1171
    dc_c_table = get_bits(gb, 4);
1172
1173
    /* unpack the Y plane DC coefficients */
1174 115329f1 Diego Biurrun
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1175 098523eb Mike Melanson
        1, residual_eob_run);
1176 d86053a4 Mike Melanson
1177 138fe832 Mike Melanson
    /* reverse prediction of the Y-plane DC coefficients */
1178
    reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
1179
1180 d86053a4 Mike Melanson
    /* unpack the C plane DC coefficients */
1181
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1182 098523eb Mike Melanson
        0, residual_eob_run);
1183 d86053a4 Mike Melanson
1184 138fe832 Mike Melanson
    /* reverse prediction of the C-plane DC coefficients */
1185
    if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1186
    {
1187
        reverse_dc_prediction(s, s->fragment_start[1],
1188
            s->fragment_width / 2, s->fragment_height / 2);
1189
        reverse_dc_prediction(s, s->fragment_start[2],
1190
            s->fragment_width / 2, s->fragment_height / 2);
1191
    }
1192
1193 f4433de9 Diego Biurrun
    /* fetch the AC table indexes */
1194 d86053a4 Mike Melanson
    ac_y_table = get_bits(gb, 4);
1195
    ac_c_table = get_bits(gb, 4);
1196
1197 9d8bb031 Mike Melanson
    /* build tables of AC VLC tables */
1198 d86053a4 Mike Melanson
    for (i = 1; i <= 5; i++) {
1199 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_1[ac_y_table];
1200
        c_tables[i] = &s->ac_vlc_1[ac_c_table];
1201 d86053a4 Mike Melanson
    }
1202
    for (i = 6; i <= 14; i++) {
1203 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_2[ac_y_table];
1204
        c_tables[i] = &s->ac_vlc_2[ac_c_table];
1205 d86053a4 Mike Melanson
    }
1206
    for (i = 15; i <= 27; i++) {
1207 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_3[ac_y_table];
1208
        c_tables[i] = &s->ac_vlc_3[ac_c_table];
1209 d86053a4 Mike Melanson
    }
1210
    for (i = 28; i <= 63; i++) {
1211 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_4[ac_y_table];
1212
        c_tables[i] = &s->ac_vlc_4[ac_c_table];
1213
    }
1214
1215
    /* decode all AC coefficents */
1216
    for (i = 1; i <= 63; i++) {
1217
        if (s->fragment_list_y_head != -1)
1218
            residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1219
                1, residual_eob_run);
1220 d86053a4 Mike Melanson
1221 9d8bb031 Mike Melanson
        if (s->fragment_list_c_head != -1)
1222
            residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1223
                0, residual_eob_run);
1224 d86053a4 Mike Melanson
    }
1225 892fc83e Mike Melanson
1226
    return 0;
1227 d86053a4 Mike Melanson
}
1228
1229
/*
1230
 * This function reverses the DC prediction for each coded fragment in
1231 115329f1 Diego Biurrun
 * the frame. Much of this function is adapted directly from the original
1232 d86053a4 Mike Melanson
 * VP3 source code.
1233
 */
1234
#define COMPATIBLE_FRAME(x) \
1235
  (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1236 7beddb12 Michael Niedermayer
#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
1237 d86053a4 Mike Melanson
1238
static void reverse_dc_prediction(Vp3DecodeContext *s,
1239
                                  int first_fragment,
1240
                                  int fragment_width,
1241 115329f1 Diego Biurrun
                                  int fragment_height)
1242 d86053a4 Mike Melanson
{
1243
1244
#define PUL 8
1245
#define PU 4
1246
#define PUR 2
1247
#define PL 1
1248
1249
    int x, y;
1250
    int i = first_fragment;
1251
1252 59ef342b Michael Niedermayer
    int predicted_dc;
1253 d86053a4 Mike Melanson
1254
    /* DC values for the left, up-left, up, and up-right fragments */
1255
    int vl, vul, vu, vur;
1256
1257 f4433de9 Diego Biurrun
    /* indexes for the left, up-left, up, and up-right fragments */
1258 d86053a4 Mike Melanson
    int l, ul, u, ur;
1259
1260 115329f1 Diego Biurrun
    /*
1261 d86053a4 Mike Melanson
     * The 6 fields mean:
1262
     *   0: up-left multiplier
1263
     *   1: up multiplier
1264
     *   2: up-right multiplier
1265
     *   3: left multiplier
1266
     */
1267 bb991087 Reimar Döffinger
    static const int predictor_transform[16][4] = {
1268 006ff1ca Michael Niedermayer
        {  0,  0,  0,  0},
1269
        {  0,  0,  0,128},        // PL
1270
        {  0,  0,128,  0},        // PUR
1271
        {  0,  0, 53, 75},        // PUR|PL
1272
        {  0,128,  0,  0},        // PU
1273
        {  0, 64,  0, 64},        // PU|PL
1274
        {  0,128,  0,  0},        // PU|PUR
1275
        {  0,  0, 53, 75},        // PU|PUR|PL
1276
        {128,  0,  0,  0},        // PUL
1277
        {  0,  0,  0,128},        // PUL|PL
1278
        { 64,  0, 64,  0},        // PUL|PUR
1279
        {  0,  0, 53, 75},        // PUL|PUR|PL
1280
        {  0,128,  0,  0},        // PUL|PU
1281
       {-104,116,  0,116},        // PUL|PU|PL
1282
        { 24, 80, 24,  0},        // PUL|PU|PUR
1283
       {-104,116,  0,116}         // PUL|PU|PUR|PL
1284 d86053a4 Mike Melanson
    };
1285
1286
    /* This table shows which types of blocks can use other blocks for
1287
     * prediction. For example, INTRA is the only mode in this table to
1288
     * have a frame number of 0. That means INTRA blocks can only predict
1289 115329f1 Diego Biurrun
     * from other INTRA blocks. There are 2 golden frame coding types;
1290 d86053a4 Mike Melanson
     * blocks encoding in these modes can only predict from other blocks
1291
     * that were encoded with these 1 of these 2 modes. */
1292 50ba3fd7 Jason Garrett-Glaser
    static const unsigned char compatible_frame[9] = {
1293 d86053a4 Mike Melanson
        1,    /* MODE_INTER_NO_MV */
1294
        0,    /* MODE_INTRA */
1295
        1,    /* MODE_INTER_PLUS_MV */
1296
        1,    /* MODE_INTER_LAST_MV */
1297
        1,    /* MODE_INTER_PRIOR_MV */
1298
        2,    /* MODE_USING_GOLDEN */
1299
        2,    /* MODE_GOLDEN_MV */
1300 50ba3fd7 Jason Garrett-Glaser
        1,    /* MODE_INTER_FOUR_MV */
1301
        3     /* MODE_COPY */
1302 d86053a4 Mike Melanson
    };
1303
    int current_frame_type;
1304
1305
    /* there is a last DC predictor for each of the 3 frame types */
1306
    short last_dc[3];
1307
1308
    int transform = 0;
1309
1310
    vul = vu = vur = vl = 0;
1311
    last_dc[0] = last_dc[1] = last_dc[2] = 0;
1312
1313
    /* for each fragment row... */
1314
    for (y = 0; y < fragment_height; y++) {
1315
1316
        /* for each fragment in a row... */
1317
        for (x = 0; x < fragment_width; x++, i++) {
1318
1319
            /* reverse prediction if this block was coded */
1320
            if (s->all_fragments[i].coding_method != MODE_COPY) {
1321
1322 115329f1 Diego Biurrun
                current_frame_type =
1323 d86053a4 Mike Melanson
                    compatible_frame[s->all_fragments[i].coding_method];
1324
1325 f72f8a77 Michael Niedermayer
                transform= 0;
1326
                if(x){
1327
                    l= i-1;
1328 7beddb12 Michael Niedermayer
                    vl = DC_COEFF(l);
1329 50ba3fd7 Jason Garrett-Glaser
                    if(COMPATIBLE_FRAME(l))
1330 006ff1ca Michael Niedermayer
                        transform |= PL;
1331 f72f8a77 Michael Niedermayer
                }
1332
                if(y){
1333
                    u= i-fragment_width;
1334 7beddb12 Michael Niedermayer
                    vu = DC_COEFF(u);
1335 50ba3fd7 Jason Garrett-Glaser
                    if(COMPATIBLE_FRAME(u))
1336 006ff1ca Michael Niedermayer
                        transform |= PU;
1337 f72f8a77 Michael Niedermayer
                    if(x){
1338
                        ul= i-fragment_width-1;
1339
                        vul = DC_COEFF(ul);
1340 50ba3fd7 Jason Garrett-Glaser
                        if(COMPATIBLE_FRAME(ul))
1341 006ff1ca Michael Niedermayer
                            transform |= PUL;
1342 f72f8a77 Michael Niedermayer
                    }
1343
                    if(x + 1 < fragment_width){
1344
                        ur= i-fragment_width+1;
1345
                        vur = DC_COEFF(ur);
1346 50ba3fd7 Jason Garrett-Glaser
                        if(COMPATIBLE_FRAME(ur))
1347 006ff1ca Michael Niedermayer
                            transform |= PUR;
1348 f72f8a77 Michael Niedermayer
                    }
1349 d86053a4 Mike Melanson
                }
1350
1351
                if (transform == 0) {
1352
1353
                    /* if there were no fragments to predict from, use last
1354
                     * DC saved */
1355 7beddb12 Michael Niedermayer
                    predicted_dc = last_dc[current_frame_type];
1356 d86053a4 Mike Melanson
                } else {
1357
1358
                    /* apply the appropriate predictor transform */
1359
                    predicted_dc =
1360
                        (predictor_transform[transform][0] * vul) +
1361
                        (predictor_transform[transform][1] * vu) +
1362
                        (predictor_transform[transform][2] * vur) +
1363
                        (predictor_transform[transform][3] * vl);
1364
1365 684d9e36 Michael Niedermayer
                    predicted_dc /= 128;
1366 d86053a4 Mike Melanson
1367
                    /* check for outranging on the [ul u l] and
1368
                     * [ul u ur l] predictors */
1369 c11cb375 Jason Garrett-Glaser
                    if ((transform == 15) || (transform == 13)) {
1370 c26abfa5 Diego Biurrun
                        if (FFABS(predicted_dc - vu) > 128)
1371 d86053a4 Mike Melanson
                            predicted_dc = vu;
1372 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vl) > 128)
1373 d86053a4 Mike Melanson
                            predicted_dc = vl;
1374 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vul) > 128)
1375 d86053a4 Mike Melanson
                            predicted_dc = vul;
1376
                    }
1377
                }
1378
1379 7beddb12 Michael Niedermayer
                /* at long last, apply the predictor */
1380
                if(s->coeffs[i].index){
1381
                    *s->next_coeff= s->coeffs[i];
1382
                    s->coeffs[i].index=0;
1383
                    s->coeffs[i].coeff=0;
1384
                    s->coeffs[i].next= s->next_coeff++;
1385
                }
1386
                s->coeffs[i].coeff += predicted_dc;
1387 d86053a4 Mike Melanson
                /* save the DC */
1388 7beddb12 Michael Niedermayer
                last_dc[current_frame_type] = DC_COEFF(i);
1389 36e16253 Reimar Döffinger
                if(DC_COEFF(i) && !(s->coeff_counts[i]&127)){
1390
                    s->coeff_counts[i]= 129;
1391 7beddb12 Michael Niedermayer
//                    s->all_fragments[i].next_coeff= s->next_coeff;
1392
                    s->coeffs[i].next= s->next_coeff;
1393
                    (s->next_coeff++)->next=NULL;
1394
                }
1395 d86053a4 Mike Melanson
            }
1396
        }
1397
    }
1398
}
1399
1400
/*
1401 dc4b78d9 Mike Melanson
 * Perform the final rendering for a particular slice of data.
1402
 * The slice number ranges from 0..(macroblock_height - 1).
1403
 */
1404
static void render_slice(Vp3DecodeContext *s, int slice)
1405
{
1406 1abbf64e Michael Niedermayer
    int x;
1407 dc4b78d9 Mike Melanson
    int16_t *dequantizer;
1408 68b51e58 Steve L'Homme
    DECLARE_ALIGNED_16(DCTELEM, block[64]);
1409 dc4b78d9 Mike Melanson
    int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1410
    int motion_halfpel_index;
1411
    uint8_t *motion_source;
1412
    int plane;
1413
    int current_macroblock_entry = slice * s->macroblock_width * 6;
1414
1415
    if (slice >= s->macroblock_height)
1416
        return;
1417
1418
    for (plane = 0; plane < 3; plane++) {
1419 1abbf64e Michael Niedermayer
        uint8_t *output_plane = s->current_frame.data    [plane];
1420
        uint8_t *  last_plane = s->   last_frame.data    [plane];
1421
        uint8_t *golden_plane = s-> golden_frame.data    [plane];
1422
        int stride            = s->current_frame.linesize[plane];
1423
        int plane_width       = s->width  >> !!plane;
1424
        int plane_height      = s->height >> !!plane;
1425
        int y =        slice *  FRAGMENT_PIXELS << !plane ;
1426
        int slice_height = y + (FRAGMENT_PIXELS << !plane);
1427
        int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
1428
1429
        if (!s->flipped_image) stride = -stride;
1430 dc4b78d9 Mike Melanson
1431 115329f1 Diego Biurrun
1432 c26abfa5 Diego Biurrun
        if(FFABS(stride) > 2048)
1433 dc4b78d9 Mike Melanson
            return; //various tables are fixed size
1434
1435
        /* for each fragment row in the slice (both of them)... */
1436
        for (; y < slice_height; y += 8) {
1437
1438
            /* for each fragment in a row... */
1439
            for (x = 0; x < plane_width; x += 8, i++) {
1440
1441
                if ((i < 0) || (i >= s->fragment_count)) {
1442
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:render_slice(): bad fragment number (%d)\n", i);
1443
                    return;
1444
                }
1445
1446
                /* transform if this block was coded */
1447
                if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1448
                    !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1449
1450
                    if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1451
                        (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1452
                        motion_source= golden_plane;
1453 115329f1 Diego Biurrun
                    else
1454 dc4b78d9 Mike Melanson
                        motion_source= last_plane;
1455
1456
                    motion_source += s->all_fragments[i].first_pixel;
1457
                    motion_halfpel_index = 0;
1458
1459
                    /* sort out the motion vector if this fragment is coded
1460
                     * using a motion vector method */
1461
                    if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1462
                        (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1463
                        int src_x, src_y;
1464
                        motion_x = s->all_fragments[i].motion_x;
1465
                        motion_y = s->all_fragments[i].motion_y;
1466
                        if(plane){
1467
                            motion_x= (motion_x>>1) | (motion_x&1);
1468
                            motion_y= (motion_y>>1) | (motion_y&1);
1469
                        }
1470
1471
                        src_x= (motion_x>>1) + x;
1472
                        src_y= (motion_y>>1) + y;
1473
                        if ((motion_x == 127) || (motion_y == 127))
1474
                            av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1475
1476
                        motion_halfpel_index = motion_x & 0x01;
1477
                        motion_source += (motion_x >> 1);
1478
1479
                        motion_halfpel_index |= (motion_y & 0x01) << 1;
1480
                        motion_source += ((motion_y >> 1) * stride);
1481
1482
                        if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1483
                            uint8_t *temp= s->edge_emu_buffer;
1484
                            if(stride<0) temp -= 9*stride;
1485
                            else temp += 9*stride;
1486
1487
                            ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1488
                            motion_source= temp;
1489
                        }
1490
                    }
1491 115329f1 Diego Biurrun
1492 dc4b78d9 Mike Melanson
1493
                    /* first, take care of copying a block from either the
1494
                     * previous or the golden frame */
1495
                    if (s->all_fragments[i].coding_method != MODE_INTRA) {
1496 115329f1 Diego Biurrun
                        /* Note, it is possible to implement all MC cases with
1497
                           put_no_rnd_pixels_l2 which would look more like the
1498
                           VP3 source but this would be slower as
1499 dc4b78d9 Mike Melanson
                           put_no_rnd_pixels_tab is better optimzed */
1500
                        if(motion_halfpel_index != 3){
1501
                            s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1502
                                output_plane + s->all_fragments[i].first_pixel,
1503
                                motion_source, stride, 8);
1504
                        }else{
1505
                            int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1506
                            s->dsp.put_no_rnd_pixels_l2[1](
1507
                                output_plane + s->all_fragments[i].first_pixel,
1508 115329f1 Diego Biurrun
                                motion_source - d,
1509
                                motion_source + stride + 1 + d,
1510 dc4b78d9 Mike Melanson
                                stride, 8);
1511
                        }
1512 f2264fa5 David Conrad
                        dequantizer = s->qmat[s->all_fragments[i].qpi][1][plane];
1513 dc4b78d9 Mike Melanson
                    }else{
1514 f2264fa5 David Conrad
                        dequantizer = s->qmat[s->all_fragments[i].qpi][0][plane];
1515 dc4b78d9 Mike Melanson
                    }
1516
1517
                    /* dequantize the DCT coefficients */
1518
                    if(s->avctx->idct_algo==FF_IDCT_VP3){
1519
                        Coeff *coeff= s->coeffs + i;
1520 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1521 dc4b78d9 Mike Melanson
                        while(coeff->next){
1522
                            block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1523
                            coeff= coeff->next;
1524
                        }
1525
                    }else{
1526
                        Coeff *coeff= s->coeffs + i;
1527 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1528 dc4b78d9 Mike Melanson
                        while(coeff->next){
1529
                            block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1530
                            coeff= coeff->next;
1531
                        }
1532
                    }
1533
1534
                    /* invert DCT and place (or add) in final output */
1535 115329f1 Diego Biurrun
1536 dc4b78d9 Mike Melanson
                    if (s->all_fragments[i].coding_method == MODE_INTRA) {
1537
                        if(s->avctx->idct_algo!=FF_IDCT_VP3)
1538
                            block[0] += 128<<3;
1539
                        s->dsp.idct_put(
1540
                            output_plane + s->all_fragments[i].first_pixel,
1541
                            stride,
1542
                            block);
1543
                    } else {
1544
                        s->dsp.idct_add(
1545
                            output_plane + s->all_fragments[i].first_pixel,
1546
                            stride,
1547
                            block);
1548
                    }
1549
                } else {
1550
1551
                    /* copy directly from the previous frame */
1552
                    s->dsp.put_pixels_tab[1][0](
1553
                        output_plane + s->all_fragments[i].first_pixel,
1554
                        last_plane + s->all_fragments[i].first_pixel,
1555
                        stride, 8);
1556
1557
                }
1558 72053728 Michael Niedermayer
#if 0
1559 2935001c Mike Melanson
                /* perform the left edge filter if:
1560
                 *   - the fragment is not on the left column
1561
                 *   - the fragment is coded in this frame
1562
                 *   - the fragment is not coded in this frame but the left
1563
                 *     fragment is coded in this frame (this is done instead
1564
                 *     of a right edge filter when rendering the left fragment
1565
                 *     since this fragment is not available yet) */
1566 f44b08a5 Mike Melanson
                if ((x > 0) &&
1567 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1568
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1569
                      (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
1570 f44b08a5 Mike Melanson
                    horizontal_filter(
1571 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel + 7*stride,
1572 1af5f60f Michael Niedermayer
                        -stride, s->bounding_values_array + 127);
1573 f44b08a5 Mike Melanson
                }
1574

1575 2935001c Mike Melanson
                /* perform the top edge filter if:
1576
                 *   - the fragment is not on the top row
1577
                 *   - the fragment is coded in this frame
1578
                 *   - the fragment is not coded in this frame but the above
1579
                 *     fragment is coded in this frame (this is done instead
1580
                 *     of a bottom edge filter when rendering the above
1581
                 *     fragment since this fragment is not available yet) */
1582 f44b08a5 Mike Melanson
                if ((y > 0) &&
1583 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1584
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1585
                      (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
1586 f44b08a5 Mike Melanson
                    vertical_filter(
1587 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel - stride,
1588 1af5f60f Michael Niedermayer
                        -stride, s->bounding_values_array + 127);
1589 f44b08a5 Mike Melanson
                }
1590 72053728 Michael Niedermayer
#endif
1591 dc4b78d9 Mike Melanson
            }
1592
        }
1593
    }
1594
1595
     /* this looks like a good place for slice dispatch... */
1596
     /* algorithm:
1597
      *   if (slice == s->macroblock_height - 1)
1598 f44b08a5 Mike Melanson
      *     dispatch (both last slice & 2nd-to-last slice);
1599
      *   else if (slice > 0)
1600
      *     dispatch (slice - 1);
1601 dc4b78d9 Mike Melanson
      */
1602
1603
    emms_c();
1604
}
1605
1606 a54ea19a Mike Melanson
static void apply_loop_filter(Vp3DecodeContext *s)
1607
{
1608 1abbf64e Michael Niedermayer
    int plane;
1609
    int x, y;
1610 f44b08a5 Mike Melanson
    int *bounding_values= s->bounding_values_array+127;
1611 d5e18835 Michael Niedermayer
1612 f44b08a5 Mike Melanson
#if 0
1613 d5e18835 Michael Niedermayer
    int bounding_values_array[256];
1614 a54ea19a Mike Melanson
    int filter_limit;
1615

1616
    /* find the right loop limit value */
1617
    for (x = 63; x >= 0; x--) {
1618
        if (vp31_ac_scale_factor[x] >= s->quality_index)
1619
            break;
1620
    }
1621 d5e18835 Michael Niedermayer
    filter_limit = vp31_filter_limit_values[s->quality_index];
1622 a54ea19a Mike Melanson

1623
    /* set up the bounding values */
1624 d5e18835 Michael Niedermayer
    memset(bounding_values_array, 0, 256 * sizeof(int));
1625 a54ea19a Mike Melanson
    for (x = 0; x < filter_limit; x++) {
1626
        bounding_values[-x - filter_limit] = -filter_limit + x;
1627
        bounding_values[-x] = -x;
1628
        bounding_values[x] = x;
1629
        bounding_values[x + filter_limit] = filter_limit - x;
1630
    }
1631 f44b08a5 Mike Melanson
#endif
1632 a54ea19a Mike Melanson
1633
    for (plane = 0; plane < 3; plane++) {
1634 1abbf64e Michael Niedermayer
        int width           = s->fragment_width  >> !!plane;
1635
        int height          = s->fragment_height >> !!plane;
1636
        int fragment        = s->fragment_start        [plane];
1637
        int stride          = s->current_frame.linesize[plane];
1638
        uint8_t *plane_data = s->current_frame.data    [plane];
1639 1af5f60f Michael Niedermayer
        if (!s->flipped_image) stride = -stride;
1640 a54ea19a Mike Melanson
1641
        for (y = 0; y < height; y++) {
1642 d86053a4 Mike Melanson
1643 a54ea19a Mike Melanson
            for (x = 0; x < width; x++) {
1644 bfb5a8ce Jason Garrett-Glaser
                /* This code basically just deblocks on the edges of coded blocks.
1645
                 * However, it has to be much more complicated because of the
1646
                 * braindamaged deblock ordering used in VP3/Theora. Order matters
1647
                 * because some pixels get filtered twice. */
1648
                if( s->all_fragments[fragment].coding_method != MODE_COPY )
1649
                {
1650 08f19605 Carl Eugen Hoyos
                    /* do not perform left edge filter for left columns frags */
1651 bfb5a8ce Jason Garrett-Glaser
                    if (x > 0) {
1652 08f19605 Carl Eugen Hoyos
                        s->dsp.vp3_h_loop_filter(
1653
                            plane_data + s->all_fragments[fragment].first_pixel,
1654
                            stride, bounding_values);
1655
                    }
1656 a54ea19a Mike Melanson
1657 08f19605 Carl Eugen Hoyos
                    /* do not perform top edge filter for top row fragments */
1658 bfb5a8ce Jason Garrett-Glaser
                    if (y > 0) {
1659 08f19605 Carl Eugen Hoyos
                        s->dsp.vp3_v_loop_filter(
1660
                            plane_data + s->all_fragments[fragment].first_pixel,
1661
                            stride, bounding_values);
1662
                    }
1663 a54ea19a Mike Melanson
1664 08f19605 Carl Eugen Hoyos
                    /* do not perform right edge filter for right column
1665
                     * fragments or if right fragment neighbor is also coded
1666
                     * in this frame (it will be filtered in next iteration) */
1667
                    if ((x < width - 1) &&
1668
                        (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1669
                        s->dsp.vp3_h_loop_filter(
1670
                            plane_data + s->all_fragments[fragment + 1].first_pixel,
1671
                            stride, bounding_values);
1672
                    }
1673 a54ea19a Mike Melanson
1674 08f19605 Carl Eugen Hoyos
                    /* do not perform bottom edge filter for bottom row
1675
                     * fragments or if bottom fragment neighbor is also coded
1676
                     * in this frame (it will be filtered in the next row) */
1677
                    if ((y < height - 1) &&
1678
                        (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1679
                        s->dsp.vp3_v_loop_filter(
1680
                            plane_data + s->all_fragments[fragment + width].first_pixel,
1681
                            stride, bounding_values);
1682
                    }
1683 bfb5a8ce Jason Garrett-Glaser
                }
1684 a54ea19a Mike Melanson
1685
                fragment++;
1686
            }
1687
        }
1688
    }
1689 d86053a4 Mike Melanson
}
1690
1691 115329f1 Diego Biurrun
/*
1692 d86053a4 Mike Melanson
 * This function computes the first pixel addresses for each fragment.
1693
 * This function needs to be invoked after the first frame is allocated
1694
 * so that it has access to the plane strides.
1695
 */
1696 115329f1 Diego Biurrun
static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
1697 d86053a4 Mike Melanson
{
1698 fc961819 David Conrad
#define Y_INITIAL(chroma_shift)  s->flipped_image ? 1  : s->fragment_height >> chroma_shift
1699
#define Y_FINISHED(chroma_shift) s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0
1700 d86053a4 Mike Melanson
1701
    int i, x, y;
1702 fc961819 David Conrad
    const int y_inc = s->flipped_image ? 1 : -1;
1703 d86053a4 Mike Melanson
1704
    /* figure out the first pixel addresses for each of the fragments */
1705
    /* Y plane */
1706
    i = 0;
1707 fc961819 David Conrad
    for (y = Y_INITIAL(0); Y_FINISHED(0); y += y_inc) {
1708 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width; x++) {
1709 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1710 d86053a4 Mike Melanson
                s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
1711
                    s->golden_frame.linesize[0] +
1712
                    x * FRAGMENT_PIXELS;
1713
        }
1714
    }
1715
1716
    /* U plane */
1717 1abbf64e Michael Niedermayer
    i = s->fragment_start[1];
1718 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1719 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width / 2; x++) {
1720 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1721 d86053a4 Mike Melanson
                s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
1722
                    s->golden_frame.linesize[1] +
1723
                    x * FRAGMENT_PIXELS;
1724
        }
1725
    }
1726
1727
    /* V plane */
1728 1abbf64e Michael Niedermayer
    i = s->fragment_start[2];
1729 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1730 9a7ad925 Alex Beregszaszi
        for (x = 0; x < s->fragment_width / 2; x++) {
1731 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1732 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
1733
                    s->golden_frame.linesize[2] +
1734
                    x * FRAGMENT_PIXELS;
1735
        }
1736
    }
1737
}
1738
1739 d86053a4 Mike Melanson
/*
1740
 * This is the ffmpeg/libavcodec API init function.
1741
 */
1742 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_init(AVCodecContext *avctx)
1743 d86053a4 Mike Melanson
{
1744
    Vp3DecodeContext *s = avctx->priv_data;
1745 ae1dd8e1 Michael Niedermayer
    int i, inter, plane;
1746 892fc83e Mike Melanson
    int c_width;
1747
    int c_height;
1748
    int y_superblock_count;
1749
    int c_superblock_count;
1750 d86053a4 Mike Melanson
1751 3c3f113e Alex Beregszaszi
    if (avctx->codec_tag == MKTAG('V','P','3','0'))
1752 bb270c08 Diego Biurrun
        s->version = 0;
1753 3c3f113e Alex Beregszaszi
    else
1754 bb270c08 Diego Biurrun
        s->version = 1;
1755 3c3f113e Alex Beregszaszi
1756 d86053a4 Mike Melanson
    s->avctx = avctx;
1757 ef516f73 David Conrad
    s->width = FFALIGN(avctx->width, 16);
1758
    s->height = FFALIGN(avctx->height, 16);
1759 d86053a4 Mike Melanson
    avctx->pix_fmt = PIX_FMT_YUV420P;
1760 580a7465 David Conrad
    avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1761 8b6103da Michael Niedermayer
    if(avctx->idct_algo==FF_IDCT_AUTO)
1762
        avctx->idct_algo=FF_IDCT_VP3;
1763 d86053a4 Mike Melanson
    dsputil_init(&s->dsp, avctx);
1764 115329f1 Diego Biurrun
1765 36af0c95 Michael Niedermayer
    ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
1766 d86053a4 Mike Melanson
1767
    /* initialize to an impossible value which will force a recalculation
1768
     * in the first frame decode */
1769 f2264fa5 David Conrad
    for (i = 0; i < 3; i++)
1770
        s->qps[i] = -1;
1771 d86053a4 Mike Melanson
1772 892fc83e Mike Melanson
    s->y_superblock_width = (s->width + 31) / 32;
1773
    s->y_superblock_height = (s->height + 31) / 32;
1774
    y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1775
1776
    /* work out the dimensions for the C planes */
1777
    c_width = s->width / 2;
1778
    c_height = s->height / 2;
1779
    s->c_superblock_width = (c_width + 31) / 32;
1780
    s->c_superblock_height = (c_height + 31) / 32;
1781
    c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1782
1783
    s->superblock_count = y_superblock_count + (c_superblock_count * 2);
1784
    s->u_superblock_start = y_superblock_count;
1785
    s->v_superblock_start = s->u_superblock_start + c_superblock_count;
1786 d86053a4 Mike Melanson
    s->superblock_coding = av_malloc(s->superblock_count);
1787
1788
    s->macroblock_width = (s->width + 15) / 16;
1789
    s->macroblock_height = (s->height + 15) / 16;
1790
    s->macroblock_count = s->macroblock_width * s->macroblock_height;
1791
1792
    s->fragment_width = s->width / FRAGMENT_PIXELS;
1793
    s->fragment_height = s->height / FRAGMENT_PIXELS;
1794
1795
    /* fragment count covers all 8x8 blocks for all 3 planes */
1796
    s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
1797 1abbf64e Michael Niedermayer
    s->fragment_start[1] = s->fragment_width * s->fragment_height;
1798
    s->fragment_start[2] = s->fragment_width * s->fragment_height * 5 / 4;
1799 d86053a4 Mike Melanson
1800
    s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
1801 36e16253 Reimar Döffinger
    s->coeff_counts = av_malloc(s->fragment_count * sizeof(*s->coeff_counts));
1802 7beddb12 Michael Niedermayer
    s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
1803 d86053a4 Mike Melanson
    s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
1804 098523eb Mike Melanson
    s->fast_fragment_list = av_malloc(s->fragment_count * sizeof(int));
1805 5e534865 Diego Biurrun
    s->pixel_addresses_initialized = 0;
1806 0efbd068 Mike Melanson
    if (!s->superblock_coding || !s->all_fragments || !s->coeff_counts ||
1807 098523eb Mike Melanson
        !s->coeffs || !s->coded_fragment_list || !s->fast_fragment_list) {
1808 0efbd068 Mike Melanson
        vp3_decode_end(avctx);
1809
        return -1;
1810
    }
1811 d86053a4 Mike Melanson
1812 f44ee2c3 Alex Beregszaszi
    if (!s->theora_tables)
1813
    {
1814 2287c100 Michael Niedermayer
        for (i = 0; i < 64; i++) {
1815 bb270c08 Diego Biurrun
            s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
1816
            s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
1817 ae1dd8e1 Michael Niedermayer
            s->base_matrix[0][i] = vp31_intra_y_dequant[i];
1818
            s->base_matrix[1][i] = vp31_intra_c_dequant[i];
1819
            s->base_matrix[2][i] = vp31_inter_dequant[i];
1820 bb270c08 Diego Biurrun
            s->filter_limit_values[i] = vp31_filter_limit_values[i];
1821 2287c100 Michael Niedermayer
        }
1822 f44ee2c3 Alex Beregszaszi
1823 ae1dd8e1 Michael Niedermayer
        for(inter=0; inter<2; inter++){
1824
            for(plane=0; plane<3; plane++){
1825
                s->qr_count[inter][plane]= 1;
1826
                s->qr_size [inter][plane][0]= 63;
1827
                s->qr_base [inter][plane][0]=
1828
                s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1829
            }
1830
        }
1831
1832 39922395 Mike Melanson
        /* init VLC tables */
1833
        for (i = 0; i < 16; i++) {
1834
1835
            /* DC histograms */
1836
            init_vlc(&s->dc_vlc[i], 5, 32,
1837
                &dc_bias[i][0][1], 4, 2,
1838
                &dc_bias[i][0][0], 4, 2, 0);
1839
1840
            /* group 1 AC histograms */
1841
            init_vlc(&s->ac_vlc_1[i], 5, 32,
1842
                &ac_bias_0[i][0][1], 4, 2,
1843
                &ac_bias_0[i][0][0], 4, 2, 0);
1844
1845
            /* group 2 AC histograms */
1846
            init_vlc(&s->ac_vlc_2[i], 5, 32,
1847
                &ac_bias_1[i][0][1], 4, 2,
1848
                &ac_bias_1[i][0][0], 4, 2, 0);
1849
1850
            /* group 3 AC histograms */
1851
            init_vlc(&s->ac_vlc_3[i], 5, 32,
1852
                &ac_bias_2[i][0][1], 4, 2,
1853
                &ac_bias_2[i][0][0], 4, 2, 0);
1854
1855
            /* group 4 AC histograms */
1856
            init_vlc(&s->ac_vlc_4[i], 5, 32,
1857
                &ac_bias_3[i][0][1], 4, 2,
1858
                &ac_bias_3[i][0][0], 4, 2, 0);
1859
        }
1860
    } else {
1861
        for (i = 0; i < 16; i++) {
1862
1863
            /* DC histograms */
1864 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->dc_vlc[i], 5, 32,
1865 39922395 Mike Melanson
                &s->huffman_table[i][0][1], 4, 2,
1866 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i][0][0], 4, 2, 0) < 0)
1867
                goto vlc_fail;
1868 39922395 Mike Melanson
1869
            /* group 1 AC histograms */
1870 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_1[i], 5, 32,
1871 39922395 Mike Melanson
                &s->huffman_table[i+16][0][1], 4, 2,
1872 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16][0][0], 4, 2, 0) < 0)
1873
                goto vlc_fail;
1874 39922395 Mike Melanson
1875
            /* group 2 AC histograms */
1876 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_2[i], 5, 32,
1877 39922395 Mike Melanson
                &s->huffman_table[i+16*2][0][1], 4, 2,
1878 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*2][0][0], 4, 2, 0) < 0)
1879
                goto vlc_fail;
1880 39922395 Mike Melanson
1881
            /* group 3 AC histograms */
1882 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_3[i], 5, 32,
1883 39922395 Mike Melanson
                &s->huffman_table[i+16*3][0][1], 4, 2,
1884 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*3][0][0], 4, 2, 0) < 0)
1885
                goto vlc_fail;
1886 39922395 Mike Melanson
1887
            /* group 4 AC histograms */
1888 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_4[i], 5, 32,
1889 39922395 Mike Melanson
                &s->huffman_table[i+16*4][0][1], 4, 2,
1890 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*4][0][0], 4, 2, 0) < 0)
1891
                goto vlc_fail;
1892 39922395 Mike Melanson
        }
1893 d86053a4 Mike Melanson
    }
1894
1895 d8278bab Mike Melanson
    init_vlc(&s->superblock_run_length_vlc, 6, 34,
1896
        &superblock_run_length_vlc_table[0][1], 4, 2,
1897
        &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1898
1899 dd36b667 Alex Beregszaszi
    init_vlc(&s->fragment_run_length_vlc, 5, 30,
1900 0ad72bdd Mike Melanson
        &fragment_run_length_vlc_table[0][1], 4, 2,
1901
        &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1902
1903
    init_vlc(&s->mode_code_vlc, 3, 8,
1904
        &mode_code_vlc_table[0][1], 2, 1,
1905
        &mode_code_vlc_table[0][0], 2, 1, 0);
1906
1907
    init_vlc(&s->motion_vector_vlc, 6, 63,
1908
        &motion_vector_vlc_table[0][1], 2, 1,
1909
        &motion_vector_vlc_table[0][0], 2, 1, 0);
1910
1911 d86053a4 Mike Melanson
    /* work out the block mapping tables */
1912
    s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1913
    s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
1914
    s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
1915 96a7e73b Mike Melanson
    s->macroblock_coding = av_malloc(s->macroblock_count + 1);
1916 0efbd068 Mike Melanson
    if (!s->superblock_fragments || !s->superblock_macroblocks ||
1917
        !s->macroblock_fragments || !s->macroblock_coding) {
1918
        vp3_decode_end(avctx);
1919
        return -1;
1920
    }
1921 d86053a4 Mike Melanson
    init_block_mapping(s);
1922
1923 44ae98dd Mike Melanson
    for (i = 0; i < 3; i++) {
1924
        s->current_frame.data[i] = NULL;
1925
        s->last_frame.data[i] = NULL;
1926
        s->golden_frame.data[i] = NULL;
1927 61873c4a Mike Melanson
    }
1928
1929 d86053a4 Mike Melanson
    return 0;
1930 c4b7b8bf Reimar Döffinger
1931
vlc_fail:
1932
    av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1933
    return -1;
1934 d86053a4 Mike Melanson
}
1935
1936
/*
1937
 * This is the ffmpeg/libavcodec API frame decode function.
1938
 */
1939 115329f1 Diego Biurrun
static int vp3_decode_frame(AVCodecContext *avctx,
1940 d86053a4 Mike Melanson
                            void *data, int *data_size,
1941 7a00bbad Thilo Borgmann
                            AVPacket *avpkt)
1942 d86053a4 Mike Melanson
{
1943 7a00bbad Thilo Borgmann
    const uint8_t *buf = avpkt->data;
1944
    int buf_size = avpkt->size;
1945 d86053a4 Mike Melanson
    Vp3DecodeContext *s = avctx->priv_data;
1946
    GetBitContext gb;
1947
    static int counter = 0;
1948 dc4b78d9 Mike Melanson
    int i;
1949 d86053a4 Mike Melanson
1950
    init_get_bits(&gb, buf, buf_size * 8);
1951 115329f1 Diego Biurrun
1952 f44ee2c3 Alex Beregszaszi
    if (s->theora && get_bits1(&gb))
1953
    {
1954 bb270c08 Diego Biurrun
        av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1955
        return -1;
1956 f44ee2c3 Alex Beregszaszi
    }
1957 3c3f113e Alex Beregszaszi
1958
    s->keyframe = !get_bits1(&gb);
1959
    if (!s->theora)
1960 bb270c08 Diego Biurrun
        skip_bits(&gb, 1);
1961 f2264fa5 David Conrad
    for (i = 0; i < 3; i++)
1962
        s->last_qps[i] = s->qps[i];
1963 efea8528 Michael Niedermayer
1964 f2264fa5 David Conrad
    s->nqps=0;
1965 efea8528 Michael Niedermayer
    do{
1966 f2264fa5 David Conrad
        s->qps[s->nqps++]= get_bits(&gb, 6);
1967
    } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1968
    for (i = s->nqps; i < 3; i++)
1969
        s->qps[i] = -1;
1970 d86053a4 Mike Melanson
1971 f8830383 Alex Beregszaszi
    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1972 bb270c08 Diego Biurrun
        av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
1973 f2264fa5 David Conrad
            s->keyframe?"key":"", counter, s->qps[0]);
1974 d86053a4 Mike Melanson
    counter++;
1975
1976 f2264fa5 David Conrad
    if (s->qps[0] != s->last_qps[0])
1977 f44b08a5 Mike Melanson
        init_loop_filter(s);
1978 f2264fa5 David Conrad
1979
    for (i = 0; i < s->nqps; i++)
1980
        // reinit all dequantizers if the first one changed, because
1981
        // the DC of the first quantizer must be used for all matrices
1982
        if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1983
            init_dequantizer(s, i);
1984 642d7e84 Mike Melanson
1985 068e82ba David Conrad
    if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1986
        return buf_size;
1987
1988 d86053a4 Mike Melanson
    if (s->keyframe) {
1989 bb270c08 Diego Biurrun
        if (!s->theora)
1990
        {
1991
            skip_bits(&gb, 4); /* width code */
1992
            skip_bits(&gb, 4); /* height code */
1993
            if (s->version)
1994
            {
1995
                s->version = get_bits(&gb, 5);
1996
                if (counter == 1)
1997
                    av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1998
            }
1999
        }
2000
        if (s->version || s->theora)
2001
        {
2002
                if (get_bits1(&gb))
2003
                    av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
2004
            skip_bits(&gb, 2); /* reserved? */
2005
        }
2006 3c3f113e Alex Beregszaszi
2007 74c0ac12 Mike Melanson
        if (s->last_frame.data[0] == s->golden_frame.data[0]) {
2008
            if (s->golden_frame.data[0])
2009
                avctx->release_buffer(avctx, &s->golden_frame);
2010 8e39d4a7 Michael Niedermayer
            s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
2011 74c0ac12 Mike Melanson
        } else {
2012
            if (s->golden_frame.data[0])
2013
                avctx->release_buffer(avctx, &s->golden_frame);
2014
            if (s->last_frame.data[0])
2015
                avctx->release_buffer(avctx, &s->last_frame);
2016
        }
2017 d86053a4 Mike Melanson
2018 8e39d4a7 Michael Niedermayer
        s->golden_frame.reference = 3;
2019 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
2020 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
2021 d86053a4 Mike Melanson
            return -1;
2022
        }
2023
2024
        /* golden frame is also the current frame */
2025 4501e678 Michael Niedermayer
        s->current_frame= s->golden_frame;
2026 d86053a4 Mike Melanson
2027
        /* time to figure out pixel addresses? */
2028 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized)
2029 bb270c08 Diego Biurrun
        {
2030 ba31df31 David Conrad
            vp3_calculate_pixel_addresses(s);
2031 5e534865 Diego Biurrun
            s->pixel_addresses_initialized = 1;
2032 bb270c08 Diego Biurrun
        }
2033 d86053a4 Mike Melanson
    } else {
2034
        /* allocate a new current frame */
2035 8e39d4a7 Michael Niedermayer
        s->current_frame.reference = 3;
2036 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized) {
2037 bc185f72 Reimar Döffinger
            av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n");
2038
            return -1;
2039
        }
2040 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
2041 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
2042 d86053a4 Mike Melanson
            return -1;
2043
        }
2044
    }
2045
2046 b928ec64 Michael Niedermayer
    s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
2047
    s->current_frame.qstride= 0;
2048
2049 d86053a4 Mike Melanson
    init_frame(s, &gb);
2050
2051 220a6f40 Michael Niedermayer
    if (unpack_superblocks(s, &gb)){
2052
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
2053
        return -1;
2054
    }
2055
    if (unpack_modes(s, &gb)){
2056
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
2057
        return -1;
2058
    }
2059
    if (unpack_vectors(s, &gb)){
2060
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2061
        return -1;
2062
    }
2063 f2264fa5 David Conrad
    if (unpack_block_qpis(s, &gb)){
2064
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2065
        return -1;
2066
    }
2067 220a6f40 Michael Niedermayer
    if (unpack_dct_coeffs(s, &gb)){
2068
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2069 892fc83e Mike Melanson
        return -1;
2070
    }
2071 d86053a4 Mike Melanson
2072 dc4b78d9 Mike Melanson
    for (i = 0; i < s->macroblock_height; i++)
2073
        render_slice(s, i);
2074 d86053a4 Mike Melanson
2075 72053728 Michael Niedermayer
    apply_loop_filter(s);
2076 892fc83e Mike Melanson
2077 d86053a4 Mike Melanson
    *data_size=sizeof(AVFrame);
2078
    *(AVFrame*)data= s->current_frame;
2079
2080 44ae98dd Mike Melanson
    /* release the last frame, if it is allocated and if it is not the
2081
     * golden frame */
2082
    if ((s->last_frame.data[0]) &&
2083
        (s->last_frame.data[0] != s->golden_frame.data[0]))
2084
        avctx->release_buffer(avctx, &s->last_frame);
2085 d86053a4 Mike Melanson
2086 61873c4a Mike Melanson
    /* shuffle frames (last = current) */
2087 4501e678 Michael Niedermayer
    s->last_frame= s->current_frame;
2088 8e39d4a7 Michael Niedermayer
    s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
2089 d86053a4 Mike Melanson
2090
    return buf_size;
2091
}
2092
2093
/*
2094
 * This is the ffmpeg/libavcodec API module cleanup function.
2095
 */
2096 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_end(AVCodecContext *avctx)
2097 d86053a4 Mike Melanson
{
2098
    Vp3DecodeContext *s = avctx->priv_data;
2099 6f4e2b5a Måns Rullgård
    int i;
2100 d86053a4 Mike Melanson
2101 6f4e2b5a Måns Rullgård
    av_free(s->superblock_coding);
2102 d86053a4 Mike Melanson
    av_free(s->all_fragments);
2103 36e16253 Reimar Döffinger
    av_free(s->coeff_counts);
2104 a2df5a50 Michael Niedermayer
    av_free(s->coeffs);
2105 d86053a4 Mike Melanson
    av_free(s->coded_fragment_list);
2106 098523eb Mike Melanson
    av_free(s->fast_fragment_list);
2107 d86053a4 Mike Melanson
    av_free(s->superblock_fragments);
2108
    av_free(s->superblock_macroblocks);
2109
    av_free(s->macroblock_fragments);
2110 96a7e73b Mike Melanson
    av_free(s->macroblock_coding);
2111 115329f1 Diego Biurrun
2112 6f4e2b5a Måns Rullgård
    for (i = 0; i < 16; i++) {
2113
        free_vlc(&s->dc_vlc[i]);
2114
        free_vlc(&s->ac_vlc_1[i]);
2115
        free_vlc(&s->ac_vlc_2[i]);
2116
        free_vlc(&s->ac_vlc_3[i]);
2117
        free_vlc(&s->ac_vlc_4[i]);
2118
    }
2119
2120
    free_vlc(&s->superblock_run_length_vlc);
2121
    free_vlc(&s->fragment_run_length_vlc);
2122
    free_vlc(&s->mode_code_vlc);
2123
    free_vlc(&s->motion_vector_vlc);
2124
2125 d86053a4 Mike Melanson
    /* release all frames */
2126 8e39d4a7 Michael Niedermayer
    if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
2127 892fc83e Mike Melanson
        avctx->release_buffer(avctx, &s->golden_frame);
2128
    if (s->last_frame.data[0])
2129
        avctx->release_buffer(avctx, &s->last_frame);
2130
    /* no need to release the current_frame since it will always be pointing
2131
     * to the same frame as either the golden or last frame */
2132 d86053a4 Mike Melanson
2133
    return 0;
2134
}
2135
2136 39922395 Mike Melanson
static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2137
{
2138
    Vp3DecodeContext *s = avctx->priv_data;
2139
2140 5fc32c27 Alex Beregszaszi
    if (get_bits1(gb)) {
2141 39922395 Mike Melanson
        int token;
2142
        if (s->entries >= 32) { /* overflow */
2143
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2144
            return -1;
2145
        }
2146
        token = get_bits(gb, 5);
2147
        //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);
2148
        s->huffman_table[s->hti][token][0] = s->hbits;
2149
        s->huffman_table[s->hti][token][1] = s->huff_code_size;
2150
        s->entries++;
2151
    }
2152
    else {
2153
        if (s->huff_code_size >= 32) {/* overflow */
2154
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2155
            return -1;
2156
        }
2157
        s->huff_code_size++;
2158
        s->hbits <<= 1;
2159 00bbe276 Alex Converse
        if (read_huffman_tree(avctx, gb))
2160
            return -1;
2161 39922395 Mike Melanson
        s->hbits |= 1;
2162 00bbe276 Alex Converse
        if (read_huffman_tree(avctx, gb))
2163
            return -1;
2164 39922395 Mike Melanson
        s->hbits >>= 1;
2165
        s->huff_code_size--;
2166
    }
2167
    return 0;
2168
}
2169
2170 b250f9c6 Aurelien Jacobs
#if CONFIG_THEORA_DECODER
2171 e278056f Michael Niedermayer
static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2172 f44ee2c3 Alex Beregszaszi
{
2173
    Vp3DecodeContext *s = avctx->priv_data;
2174 c0f716b8 Aurelien Jacobs
    int visible_width, visible_height;
2175 9a7ad925 Alex Beregszaszi
2176 e278056f Michael Niedermayer
    s->theora = get_bits_long(gb, 24);
2177 356306ac Diego Biurrun
    av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2178 105c3d25 Alex Beregszaszi
2179 ba7ee4a4 Matthieu Castet
    /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
2180 9a7ad925 Alex Beregszaszi
    /* but previous versions have the image flipped relative to vp3 */
2181 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2182 9a7ad925 Alex Beregszaszi
    {
2183 bb270c08 Diego Biurrun
        s->flipped_image = 1;
2184 9a7ad925 Alex Beregszaszi
        av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2185
    }
2186 f44ee2c3 Alex Beregszaszi
2187 277e3e53 David Conrad
    visible_width  = s->width  = get_bits(gb, 16) << 4;
2188
    visible_height = s->height = get_bits(gb, 16) << 4;
2189 115329f1 Diego Biurrun
2190 0ecca7a4 Michael Niedermayer
    if(avcodec_check_dimensions(avctx, s->width, s->height)){
2191 7146d2c2 Alex Beregszaszi
        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
2192 0ecca7a4 Michael Niedermayer
        s->width= s->height= 0;
2193
        return -1;
2194
    }
2195 7146d2c2 Alex Beregszaszi
2196
    if (s->theora >= 0x030400)
2197
    {
2198 e278056f Michael Niedermayer
        skip_bits(gb, 32); /* total number of superblocks in a frame */
2199 bb270c08 Diego Biurrun
        // fixme, the next field is 36bits long
2200 e278056f Michael Niedermayer
        skip_bits(gb, 32); /* total number of blocks in a frame */
2201
        skip_bits(gb, 4); /* total number of blocks in a frame */
2202
        skip_bits(gb, 32); /* total number of macroblocks in a frame */
2203 7146d2c2 Alex Beregszaszi
    }
2204 f44ee2c3 Alex Beregszaszi
2205 277e3e53 David Conrad
    if (s->theora >= 0x030200) {
2206 a0ce2d1b David Conrad
        visible_width  = get_bits_long(gb, 24);
2207
        visible_height = get_bits_long(gb, 24);
2208 c0f716b8 Aurelien Jacobs
2209 ba4816a0 Aurelien Jacobs
        skip_bits(gb, 8); /* offset x */
2210
        skip_bits(gb, 8); /* offset y */
2211
    }
2212 f44ee2c3 Alex Beregszaszi
2213 e278056f Michael Niedermayer
    skip_bits(gb, 32); /* fps numerator */
2214
    skip_bits(gb, 32); /* fps denumerator */
2215
    skip_bits(gb, 24); /* aspect numerator */
2216
    skip_bits(gb, 24); /* aspect denumerator */
2217 115329f1 Diego Biurrun
2218 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2219 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2220
    skip_bits(gb, 8); /* colorspace */
2221 7146d2c2 Alex Beregszaszi
    if (s->theora >= 0x030400)
2222 e278056f Michael Niedermayer
        skip_bits(gb, 2); /* pixel format: 420,res,422,444 */
2223
    skip_bits(gb, 24); /* bitrate */
2224 f44ee2c3 Alex Beregszaszi
2225 e278056f Michael Niedermayer
    skip_bits(gb, 6); /* quality hint */
2226 115329f1 Diego Biurrun
2227 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2228 105c3d25 Alex Beregszaszi
    {
2229 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2230 115329f1 Diego Biurrun
2231 bb270c08 Diego Biurrun
        if (s->theora < 0x030400)
2232 e278056f Michael Niedermayer
            skip_bits(gb, 5); /* spare bits */
2233 105c3d25 Alex Beregszaszi
    }
2234 115329f1 Diego Biurrun
2235 e278056f Michael Niedermayer
//    align_get_bits(gb);
2236 115329f1 Diego Biurrun
2237 c0f716b8 Aurelien Jacobs
    if (   visible_width  <= s->width  && visible_width  > s->width-16
2238
        && visible_height <= s->height && visible_height > s->height-16)
2239
        avcodec_set_dimensions(avctx, visible_width, visible_height);
2240
    else
2241
        avcodec_set_dimensions(avctx, s->width, s->height);
2242 f44ee2c3 Alex Beregszaszi
2243
    return 0;
2244
}
2245
2246 e278056f Michael Niedermayer
static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2247 f44ee2c3 Alex Beregszaszi
{
2248
    Vp3DecodeContext *s = avctx->priv_data;
2249 ae1dd8e1 Michael Niedermayer
    int i, n, matrices, inter, plane;
2250 ba7ee4a4 Matthieu Castet
2251
    if (s->theora >= 0x030200) {
2252 e278056f Michael Niedermayer
        n = get_bits(gb, 3);
2253 9c7154c7 Mike Melanson
        /* loop filter limit values table */
2254 e13cca4b Reimar Döffinger
        for (i = 0; i < 64; i++) {
2255 e278056f Michael Niedermayer
            s->filter_limit_values[i] = get_bits(gb, n);
2256 e13cca4b Reimar Döffinger
            if (s->filter_limit_values[i] > 127) {
2257
                av_log(avctx, AV_LOG_ERROR, "filter limit value too large (%i > 127), clamping\n", s->filter_limit_values[i]);
2258
                s->filter_limit_values[i] = 127;
2259
            }
2260
        }
2261 ba7ee4a4 Matthieu Castet
    }
2262 115329f1 Diego Biurrun
2263 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2264 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2265 ba7ee4a4 Matthieu Castet
    else
2266
        n = 16;
2267 f44ee2c3 Alex Beregszaszi
    /* quality threshold table */
2268
    for (i = 0; i < 64; i++)
2269 e278056f Michael Niedermayer
        s->coded_ac_scale_factor[i] = get_bits(gb, n);
2270 f44ee2c3 Alex Beregszaszi
2271 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2272 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2273 ba7ee4a4 Matthieu Castet
    else
2274
        n = 16;
2275 f44ee2c3 Alex Beregszaszi
    /* dc scale factor table */
2276
    for (i = 0; i < 64; i++)
2277 e278056f Michael Niedermayer
        s->coded_dc_scale_factor[i] = get_bits(gb, n);
2278 f44ee2c3 Alex Beregszaszi
2279 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2280 e278056f Michael Niedermayer
        matrices = get_bits(gb, 9) + 1;
2281 ba7ee4a4 Matthieu Castet
    else
2282 2da2ba03 Matthieu Castet
        matrices = 3;
2283 f44ee2c3 Alex Beregszaszi
2284 ae1dd8e1 Michael Niedermayer
    if(matrices > 384){
2285
        av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2286
        return -1;
2287
    }
2288 3c3f113e Alex Beregszaszi
2289 ae1dd8e1 Michael Niedermayer
    for(n=0; n<matrices; n++){
2290 bb270c08 Diego Biurrun
        for (i = 0; i < 64; i++)
2291 ae1dd8e1 Michael Niedermayer
            s->base_matrix[n][i]= get_bits(gb, 8);
2292
    }
2293 2da2ba03 Matthieu Castet
2294 ae1dd8e1 Michael Niedermayer
    for (inter = 0; inter <= 1; inter++) {
2295
        for (plane = 0; plane <= 2; plane++) {
2296
            int newqr= 1;
2297
            if (inter || plane > 0)
2298 5fc32c27 Alex Beregszaszi
                newqr = get_bits1(gb);
2299 39922395 Mike Melanson
            if (!newqr) {
2300 ae1dd8e1 Michael Niedermayer
                int qtj, plj;
2301 5fc32c27 Alex Beregszaszi
                if(inter && get_bits1(gb)){
2302 ae1dd8e1 Michael Niedermayer
                    qtj = 0;
2303
                    plj = plane;
2304
                }else{
2305
                    qtj= (3*inter + plane - 1) / 3;
2306
                    plj= (plane + 2) % 3;
2307
                }
2308
                s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2309
                memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2310
                memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2311
            } else {
2312
                int qri= 0;
2313 39922395 Mike Melanson
                int qi = 0;
2314 ae1dd8e1 Michael Niedermayer
2315
                for(;;){
2316
                    i= get_bits(gb, av_log2(matrices-1)+1);
2317
                    if(i>= matrices){
2318
                        av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2319
                        return -1;
2320
                    }
2321
                    s->qr_base[inter][plane][qri]= i;
2322
                    if(qi >= 63)
2323
                        break;
2324
                    i = get_bits(gb, av_log2(63-qi)+1) + 1;
2325
                    s->qr_size[inter][plane][qri++]= i;
2326
                    qi += i;
2327 39922395 Mike Melanson
                }
2328 ae1dd8e1 Michael Niedermayer
2329 2da2ba03 Matthieu Castet
                if (qi > 63) {
2330 7146d2c2 Alex Beregszaszi
                    av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2331 bb270c08 Diego Biurrun
                    return -1;
2332
                }
2333 ae1dd8e1 Michael Niedermayer
                s->qr_count[inter][plane]= qri;
2334 39922395 Mike Melanson
            }
2335
        }
2336
    }
2337
2338 2da2ba03 Matthieu Castet
    /* Huffman tables */
2339 39922395 Mike Melanson
    for (s->hti = 0; s->hti < 80; s->hti++) {
2340
        s->entries = 0;
2341
        s->huff_code_size = 1;
2342 5fc32c27 Alex Beregszaszi
        if (!get_bits1(gb)) {
2343 39922395 Mike Melanson
            s->hbits = 0;
2344 00bbe276 Alex Converse
            if(read_huffman_tree(avctx, gb))
2345
                return -1;
2346 39922395 Mike Melanson
            s->hbits = 1;
2347 00bbe276 Alex Converse
            if(read_huffman_tree(avctx, gb))
2348
                return -1;
2349 39922395 Mike Melanson
        }
2350
    }
2351 115329f1 Diego Biurrun
2352 f44ee2c3 Alex Beregszaszi
    s->theora_tables = 1;
2353 115329f1 Diego Biurrun
2354 f44ee2c3 Alex Beregszaszi
    return 0;
2355
}
2356
2357 5ef251e5 Daniel Verkamp
static av_cold int theora_decode_init(AVCodecContext *avctx)
2358 f44ee2c3 Alex Beregszaszi
{
2359
    Vp3DecodeContext *s = avctx->priv_data;
2360
    GetBitContext gb;
2361
    int ptype;
2362 da91ed59 Aurelien Jacobs
    uint8_t *header_start[3];
2363
    int header_len[3];
2364
    int i;
2365 115329f1 Diego Biurrun
2366 f44ee2c3 Alex Beregszaszi
    s->theora = 1;
2367
2368
    if (!avctx->extradata_size)
2369 7146d2c2 Alex Beregszaszi
    {
2370
        av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
2371 bb270c08 Diego Biurrun
        return -1;
2372 7146d2c2 Alex Beregszaszi
    }
2373 f44ee2c3 Alex Beregszaszi
2374 da91ed59 Aurelien Jacobs
    if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2375
                              42, header_start, header_len) < 0) {
2376
        av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2377
        return -1;
2378
    }
2379 ee89b2b9 Michael Niedermayer
2380 da91ed59 Aurelien Jacobs
  for(i=0;i<3;i++) {
2381 fa6f2751 Google Chrome
    init_get_bits(&gb, header_start[i], header_len[i] * 8);
2382 f44ee2c3 Alex Beregszaszi
2383
    ptype = get_bits(&gb, 8);
2384 115329f1 Diego Biurrun
2385 7146d2c2 Alex Beregszaszi
     if (!(ptype & 0x80))
2386
     {
2387
        av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
2388 e278056f Michael Niedermayer
//        return -1;
2389 115329f1 Diego Biurrun
     }
2390 7146d2c2 Alex Beregszaszi
2391 3700dab4 Diego Biurrun
    // FIXME: Check for this as well.
2392 0a8dedc9 David Conrad
    skip_bits_long(&gb, 6*8); /* "theora" */
2393 115329f1 Diego Biurrun
2394 f44ee2c3 Alex Beregszaszi
    switch(ptype)
2395
    {
2396
        case 0x80:
2397 e278056f Michael Niedermayer
            theora_decode_header(avctx, &gb);
2398 bb270c08 Diego Biurrun
                break;
2399
        case 0x81:
2400 2da2ba03 Matthieu Castet
// FIXME: is this needed? it breaks sometimes
2401 bb270c08 Diego Biurrun
//            theora_decode_comments(avctx, gb);
2402
            break;
2403
        case 0x82:
2404 00bbe276 Alex Converse
            if (theora_decode_tables(avctx, &gb))
2405
                return -1;
2406 bb270c08 Diego Biurrun
            break;
2407
        default:
2408
            av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2409
            break;
2410 f44ee2c3 Alex Beregszaszi
    }
2411 12ce1f3f David Conrad
    if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2412
        av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
2413 116d866c Matthieu Castet
    if (s->theora < 0x030200)
2414
        break;
2415 ee89b2b9 Michael Niedermayer
  }
2416 f44ee2c3 Alex Beregszaszi
2417 c79c960a Reimar Döffinger
    return vp3_decode_init(avctx);
2418 f44ee2c3 Alex Beregszaszi
}
2419
2420 6f6a3e2a Diego Biurrun
AVCodec theora_decoder = {
2421
    "theora",
2422 d86053a4 Mike Melanson
    CODEC_TYPE_VIDEO,
2423 6f6a3e2a Diego Biurrun
    CODEC_ID_THEORA,
2424 d86053a4 Mike Melanson
    sizeof(Vp3DecodeContext),
2425 6f6a3e2a Diego Biurrun
    theora_decode_init,
2426 d86053a4 Mike Melanson
    NULL,
2427
    vp3_decode_end,
2428
    vp3_decode_frame,
2429 7f57905d Baptiste Coudurier
    CODEC_CAP_DR1,
2430 d5202e4f Stefano Sabatini
    NULL,
2431 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("Theora"),
2432 d86053a4 Mike Melanson
};
2433 6f6a3e2a Diego Biurrun
#endif
2434 f44ee2c3 Alex Beregszaszi
2435 6f6a3e2a Diego Biurrun
AVCodec vp3_decoder = {
2436
    "vp3",
2437 f44ee2c3 Alex Beregszaszi
    CODEC_TYPE_VIDEO,
2438 6f6a3e2a Diego Biurrun
    CODEC_ID_VP3,
2439 f44ee2c3 Alex Beregszaszi
    sizeof(Vp3DecodeContext),
2440 6f6a3e2a Diego Biurrun
    vp3_decode_init,
2441 f44ee2c3 Alex Beregszaszi
    NULL,
2442
    vp3_decode_end,
2443
    vp3_decode_frame,
2444 7f57905d Baptiste Coudurier
    CODEC_CAP_DR1,
2445 d5202e4f Stefano Sabatini
    NULL,
2446 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
2447 f44ee2c3 Alex Beregszaszi
};