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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)
469
{
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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;
478
        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
                /* vector maintenance, only on MODE_INTER_PLUS_MV */
895
                if (s->macroblock_coding[current_macroblock] ==
896
                    MODE_INTER_PLUS_MV) {
897 e32e2d56 Aurelien Jacobs
                    prior_last_motion_x = last_motion_x;
898
                    prior_last_motion_y = last_motion_y;
899 1ae4518d David Conrad
                    last_motion_x = motion_x[0];
900
                    last_motion_y = motion_y[0];
901
                }
902
                break;
903
904
            case MODE_INTER_FOURMV:
905
                /* vector maintenance */
906
                prior_last_motion_x = last_motion_x;
907
                prior_last_motion_y = last_motion_y;
908
909
                /* fetch 4 vectors from the bitstream, one for each
910
                 * Y fragment, then average for the C fragment vectors */
911
                motion_x[4] = motion_y[4] = 0;
912
                for (k = 0; k < 4; k++) {
913
                    for (l = 0; l < s->coded_fragment_list_index; l++)
914
                        if (s->coded_fragment_list[l] == s->macroblock_fragments[6*current_macroblock + k])
915
                            break;
916
                    if (l < s->coded_fragment_list_index) {
917
                        if (coding_mode == 0) {
918
                            motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
919
                            motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
920 feaf1a73 Aurelien Jacobs
                        } else {
921 1ae4518d David Conrad
                            motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
922
                            motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
923 feaf1a73 Aurelien Jacobs
                        }
924 1ae4518d David Conrad
                        last_motion_x = motion_x[k];
925
                        last_motion_y = motion_y[k];
926
                    } else {
927
                        motion_x[k] = 0;
928
                        motion_y[k] = 0;
929 d86053a4 Mike Melanson
                    }
930 1ae4518d David Conrad
                    motion_x[4] += motion_x[k];
931
                    motion_y[4] += motion_y[k];
932
                }
933 d86053a4 Mike Melanson
934 1ae4518d David Conrad
                motion_x[5]=
935
                motion_x[4]= RSHIFT(motion_x[4], 2);
936
                motion_y[5]=
937
                motion_y[4]= RSHIFT(motion_y[4], 2);
938
                break;
939
940
            case MODE_INTER_LAST_MV:
941
                /* all 6 fragments use the last motion vector */
942
                motion_x[0] = last_motion_x;
943
                motion_y[0] = last_motion_y;
944 d86053a4 Mike Melanson
945 1ae4518d David Conrad
                /* no vector maintenance (last vector remains the
946
                 * last vector) */
947
                break;
948
949
            case MODE_INTER_PRIOR_LAST:
950
                /* all 6 fragments use the motion vector prior to the
951
                 * last motion vector */
952
                motion_x[0] = prior_last_motion_x;
953
                motion_y[0] = prior_last_motion_y;
954 d86053a4 Mike Melanson
955 1ae4518d David Conrad
                /* vector maintenance */
956
                prior_last_motion_x = last_motion_x;
957
                prior_last_motion_y = last_motion_y;
958
                last_motion_x = motion_x[0];
959
                last_motion_y = motion_y[0];
960
                break;
961 44ae98dd Mike Melanson
962 1ae4518d David Conrad
            default:
963
                /* covers intra, inter without MV, golden without MV */
964 e6e32bdc Mike Melanson
                motion_x[0] = 0;
965
                motion_y[0] = 0;
966 44ae98dd Mike Melanson
967 1ae4518d David Conrad
                /* no vector maintenance */
968
                break;
969
            }
970 d86053a4 Mike Melanson
971 1ae4518d David Conrad
            /* assign the motion vectors to the correct fragments */
972
            for (k = 0; k < 6; k++) {
973
                current_fragment =
974
                    s->macroblock_fragments[current_macroblock * 6 + k];
975
                if (current_fragment == -1)
976
                    continue;
977
                if (current_fragment >= s->fragment_count) {
978
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
979
                        current_fragment, s->fragment_count);
980
                    return 1;
981 d86053a4 Mike Melanson
                }
982 e6e32bdc Mike Melanson
                if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
983 da8af938 Mike Melanson
                    s->all_fragments[current_fragment].motion_x = motion_x[k];
984
                    s->all_fragments[current_fragment].motion_y = motion_y[k];
985 e6e32bdc Mike Melanson
                } else {
986
                    s->all_fragments[current_fragment].motion_x = motion_x[0];
987
                    s->all_fragments[current_fragment].motion_y = motion_y[0];
988
                }
989 d86053a4 Mike Melanson
            }
990
        }
991 1ae4518d David Conrad
    }
992 892fc83e Mike Melanson
993
    return 0;
994 d86053a4 Mike Melanson
}
995
996 f2264fa5 David Conrad
static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
997
{
998
    int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
999
    int num_blocks = s->coded_fragment_list_index;
1000
1001
    for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
1002
        i = blocks_decoded = num_blocks_at_qpi = 0;
1003
1004
        bit = get_bits1(gb);
1005
1006
        do {
1007
            run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
1008
            if (run_length == 34)
1009
                run_length += get_bits(gb, 12);
1010
            blocks_decoded += run_length;
1011
1012
            if (!bit)
1013
                num_blocks_at_qpi += run_length;
1014
1015
            for (j = 0; j < run_length; i++) {
1016 310afddf Google Chrome
                if (i >= s->coded_fragment_list_index)
1017 f2264fa5 David Conrad
                    return -1;
1018
1019
                if (s->all_fragments[s->coded_fragment_list[i]].qpi == qpi) {
1020
                    s->all_fragments[s->coded_fragment_list[i]].qpi += bit;
1021
                    j++;
1022
                }
1023
            }
1024
1025
            if (run_length == 4129)
1026
                bit = get_bits1(gb);
1027
            else
1028
                bit ^= 1;
1029
        } while (blocks_decoded < num_blocks);
1030
1031
        num_blocks -= num_blocks_at_qpi;
1032
    }
1033
1034
    return 0;
1035
}
1036
1037 115329f1 Diego Biurrun
/*
1038 d86053a4 Mike Melanson
 * This function is called by unpack_dct_coeffs() to extract the VLCs from
1039
 * the bitstream. The VLCs encode tokens which are used to unpack DCT
1040
 * data. This function unpacks all the VLCs for either the Y plane or both
1041
 * C planes, and is called for DC coefficients or different AC coefficient
1042
 * levels (since different coefficient types require different VLC tables.
1043
 *
1044
 * This function returns a residual eob run. E.g, if a particular token gave
1045
 * instructions to EOB the next 5 fragments and there were only 2 fragments
1046
 * left in the current fragment range, 3 would be returned so that it could
1047
 * be passed into the next call to this same function.
1048
 */
1049
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
1050
                        VLC *table, int coeff_index,
1051 098523eb Mike Melanson
                        int y_plane,
1052 d86053a4 Mike Melanson
                        int eob_run)
1053
{
1054
    int i;
1055
    int token;
1056 d3076955 Mike Melanson
    int zero_run = 0;
1057
    DCTELEM coeff = 0;
1058 d86053a4 Mike Melanson
    Vp3Fragment *fragment;
1059 d3076955 Mike Melanson
    int bits_to_get;
1060 098523eb Mike Melanson
    int next_fragment;
1061
    int previous_fragment;
1062
    int fragment_num;
1063
    int *list_head;
1064 d86053a4 Mike Melanson
1065 ee3d7f58 Mike Melanson
    /* local references to structure members to avoid repeated deferences */
1066
    uint8_t *perm= s->scantable.permutated;
1067
    int *coded_fragment_list = s->coded_fragment_list;
1068
    Vp3Fragment *all_fragments = s->all_fragments;
1069
    uint8_t *coeff_counts = s->coeff_counts;
1070
    VLC_TYPE (*vlc_table)[2] = table->table;
1071 098523eb Mike Melanson
    int *fast_fragment_list = s->fast_fragment_list;
1072 ee3d7f58 Mike Melanson
1073 098523eb Mike Melanson
    if (y_plane) {
1074
        next_fragment = s->fragment_list_y_head;
1075
        list_head = &s->fragment_list_y_head;
1076
    } else {
1077
        next_fragment = s->fragment_list_c_head;
1078
        list_head = &s->fragment_list_c_head;
1079 74c0ac12 Mike Melanson
    }
1080
1081 098523eb Mike Melanson
    i = next_fragment;
1082
    previous_fragment = -1;  /* this indicates that the previous fragment is actually the list head */
1083
    while (i != -1) {
1084
        fragment_num = coded_fragment_list[i];
1085 d86053a4 Mike Melanson
1086 098523eb Mike Melanson
        if (coeff_counts[fragment_num] > coeff_index) {
1087
            previous_fragment = i;
1088
            i = fast_fragment_list[i];
1089 d86053a4 Mike Melanson
            continue;
1090 098523eb Mike Melanson
        }
1091 ee3d7f58 Mike Melanson
        fragment = &all_fragments[fragment_num];
1092 d86053a4 Mike Melanson
1093
        if (!eob_run) {
1094
            /* decode a VLC into a token */
1095 ee3d7f58 Mike Melanson
            token = get_vlc2(gb, vlc_table, 5, 3);
1096 d86053a4 Mike Melanson
            /* use the token to get a zero run, a coefficient, and an eob run */
1097 d3076955 Mike Melanson
            if (token <= 6) {
1098
                eob_run = eob_run_base[token];
1099
                if (eob_run_get_bits[token])
1100
                    eob_run += get_bits(gb, eob_run_get_bits[token]);
1101
                coeff = zero_run = 0;
1102
            } else {
1103
                bits_to_get = coeff_get_bits[token];
1104 428984b0 Mike Melanson
                if (bits_to_get)
1105
                    bits_to_get = get_bits(gb, bits_to_get);
1106
                coeff = coeff_tables[token][bits_to_get];
1107 d3076955 Mike Melanson
1108
                zero_run = zero_run_base[token];
1109
                if (zero_run_get_bits[token])
1110
                    zero_run += get_bits(gb, zero_run_get_bits[token]);
1111
            }
1112 d86053a4 Mike Melanson
        }
1113
1114
        if (!eob_run) {
1115 ee3d7f58 Mike Melanson
            coeff_counts[fragment_num] += zero_run;
1116
            if (coeff_counts[fragment_num] < 64){
1117 7beddb12 Michael Niedermayer
                fragment->next_coeff->coeff= coeff;
1118 ee3d7f58 Mike Melanson
                fragment->next_coeff->index= perm[coeff_counts[fragment_num]++]; //FIXME perm here already?
1119 7beddb12 Michael Niedermayer
                fragment->next_coeff->next= s->next_coeff;
1120
                s->next_coeff->next=NULL;
1121
                fragment->next_coeff= s->next_coeff++;
1122
            }
1123 098523eb Mike Melanson
            /* previous fragment is now this fragment */
1124
            previous_fragment = i;
1125 d86053a4 Mike Melanson
        } else {
1126 ee3d7f58 Mike Melanson
            coeff_counts[fragment_num] |= 128;
1127 d86053a4 Mike Melanson
            eob_run--;
1128 098523eb Mike Melanson
            /* remove this fragment from the list */
1129
            if (previous_fragment != -1)
1130
                fast_fragment_list[previous_fragment] = fast_fragment_list[i];
1131
            else
1132
                *list_head = fast_fragment_list[i];
1133
            /* previous fragment remains unchanged */
1134 d86053a4 Mike Melanson
        }
1135 098523eb Mike Melanson
1136
        i = fast_fragment_list[i];
1137 d86053a4 Mike Melanson
    }
1138
1139
    return eob_run;
1140
}
1141
1142 138fe832 Mike Melanson
static void reverse_dc_prediction(Vp3DecodeContext *s,
1143
                                  int first_fragment,
1144
                                  int fragment_width,
1145
                                  int fragment_height);
1146 d86053a4 Mike Melanson
/*
1147
 * This function unpacks all of the DCT coefficient data from the
1148
 * bitstream.
1149
 */
1150 892fc83e Mike Melanson
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1151 d86053a4 Mike Melanson
{
1152
    int i;
1153
    int dc_y_table;
1154
    int dc_c_table;
1155
    int ac_y_table;
1156
    int ac_c_table;
1157
    int residual_eob_run = 0;
1158 9d8bb031 Mike Melanson
    VLC *y_tables[64];
1159
    VLC *c_tables[64];
1160 d86053a4 Mike Melanson
1161 f4433de9 Diego Biurrun
    /* fetch the DC table indexes */
1162 d86053a4 Mike Melanson
    dc_y_table = get_bits(gb, 4);
1163
    dc_c_table = get_bits(gb, 4);
1164
1165
    /* unpack the Y plane DC coefficients */
1166 115329f1 Diego Biurrun
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1167 098523eb Mike Melanson
        1, residual_eob_run);
1168 d86053a4 Mike Melanson
1169 138fe832 Mike Melanson
    /* reverse prediction of the Y-plane DC coefficients */
1170
    reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
1171
1172 d86053a4 Mike Melanson
    /* unpack the C plane DC coefficients */
1173
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1174 098523eb Mike Melanson
        0, residual_eob_run);
1175 d86053a4 Mike Melanson
1176 138fe832 Mike Melanson
    /* reverse prediction of the C-plane DC coefficients */
1177
    if (!(s->avctx->flags & CODEC_FLAG_GRAY))
1178
    {
1179
        reverse_dc_prediction(s, s->fragment_start[1],
1180
            s->fragment_width / 2, s->fragment_height / 2);
1181
        reverse_dc_prediction(s, s->fragment_start[2],
1182
            s->fragment_width / 2, s->fragment_height / 2);
1183
    }
1184
1185 f4433de9 Diego Biurrun
    /* fetch the AC table indexes */
1186 d86053a4 Mike Melanson
    ac_y_table = get_bits(gb, 4);
1187
    ac_c_table = get_bits(gb, 4);
1188
1189 9d8bb031 Mike Melanson
    /* build tables of AC VLC tables */
1190 d86053a4 Mike Melanson
    for (i = 1; i <= 5; i++) {
1191 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_1[ac_y_table];
1192
        c_tables[i] = &s->ac_vlc_1[ac_c_table];
1193 d86053a4 Mike Melanson
    }
1194
    for (i = 6; i <= 14; i++) {
1195 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_2[ac_y_table];
1196
        c_tables[i] = &s->ac_vlc_2[ac_c_table];
1197 d86053a4 Mike Melanson
    }
1198
    for (i = 15; i <= 27; i++) {
1199 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_3[ac_y_table];
1200
        c_tables[i] = &s->ac_vlc_3[ac_c_table];
1201 d86053a4 Mike Melanson
    }
1202
    for (i = 28; i <= 63; i++) {
1203 9d8bb031 Mike Melanson
        y_tables[i] = &s->ac_vlc_4[ac_y_table];
1204
        c_tables[i] = &s->ac_vlc_4[ac_c_table];
1205
    }
1206
1207
    /* decode all AC coefficents */
1208
    for (i = 1; i <= 63; i++) {
1209
        if (s->fragment_list_y_head != -1)
1210
            residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
1211
                1, residual_eob_run);
1212 d86053a4 Mike Melanson
1213 9d8bb031 Mike Melanson
        if (s->fragment_list_c_head != -1)
1214
            residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
1215
                0, residual_eob_run);
1216 d86053a4 Mike Melanson
    }
1217 892fc83e Mike Melanson
1218
    return 0;
1219 d86053a4 Mike Melanson
}
1220
1221
/*
1222
 * This function reverses the DC prediction for each coded fragment in
1223 115329f1 Diego Biurrun
 * the frame. Much of this function is adapted directly from the original
1224 d86053a4 Mike Melanson
 * VP3 source code.
1225
 */
1226
#define COMPATIBLE_FRAME(x) \
1227
  (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1228 7beddb12 Michael Niedermayer
#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
1229 d86053a4 Mike Melanson
1230
static void reverse_dc_prediction(Vp3DecodeContext *s,
1231
                                  int first_fragment,
1232
                                  int fragment_width,
1233 115329f1 Diego Biurrun
                                  int fragment_height)
1234 d86053a4 Mike Melanson
{
1235
1236
#define PUL 8
1237
#define PU 4
1238
#define PUR 2
1239
#define PL 1
1240
1241
    int x, y;
1242
    int i = first_fragment;
1243
1244 59ef342b Michael Niedermayer
    int predicted_dc;
1245 d86053a4 Mike Melanson
1246
    /* DC values for the left, up-left, up, and up-right fragments */
1247
    int vl, vul, vu, vur;
1248
1249 f4433de9 Diego Biurrun
    /* indexes for the left, up-left, up, and up-right fragments */
1250 d86053a4 Mike Melanson
    int l, ul, u, ur;
1251
1252 115329f1 Diego Biurrun
    /*
1253 d86053a4 Mike Melanson
     * The 6 fields mean:
1254
     *   0: up-left multiplier
1255
     *   1: up multiplier
1256
     *   2: up-right multiplier
1257
     *   3: left multiplier
1258
     */
1259 bb991087 Reimar Döffinger
    static const int predictor_transform[16][4] = {
1260 006ff1ca Michael Niedermayer
        {  0,  0,  0,  0},
1261
        {  0,  0,  0,128},        // PL
1262
        {  0,  0,128,  0},        // PUR
1263
        {  0,  0, 53, 75},        // PUR|PL
1264
        {  0,128,  0,  0},        // PU
1265
        {  0, 64,  0, 64},        // PU|PL
1266
        {  0,128,  0,  0},        // PU|PUR
1267
        {  0,  0, 53, 75},        // PU|PUR|PL
1268
        {128,  0,  0,  0},        // PUL
1269
        {  0,  0,  0,128},        // PUL|PL
1270
        { 64,  0, 64,  0},        // PUL|PUR
1271
        {  0,  0, 53, 75},        // PUL|PUR|PL
1272
        {  0,128,  0,  0},        // PUL|PU
1273
       {-104,116,  0,116},        // PUL|PU|PL
1274
        { 24, 80, 24,  0},        // PUL|PU|PUR
1275
       {-104,116,  0,116}         // PUL|PU|PUR|PL
1276 d86053a4 Mike Melanson
    };
1277
1278
    /* This table shows which types of blocks can use other blocks for
1279
     * prediction. For example, INTRA is the only mode in this table to
1280
     * have a frame number of 0. That means INTRA blocks can only predict
1281 115329f1 Diego Biurrun
     * from other INTRA blocks. There are 2 golden frame coding types;
1282 d86053a4 Mike Melanson
     * blocks encoding in these modes can only predict from other blocks
1283
     * that were encoded with these 1 of these 2 modes. */
1284 50ba3fd7 Jason Garrett-Glaser
    static const unsigned char compatible_frame[9] = {
1285 d86053a4 Mike Melanson
        1,    /* MODE_INTER_NO_MV */
1286
        0,    /* MODE_INTRA */
1287
        1,    /* MODE_INTER_PLUS_MV */
1288
        1,    /* MODE_INTER_LAST_MV */
1289
        1,    /* MODE_INTER_PRIOR_MV */
1290
        2,    /* MODE_USING_GOLDEN */
1291
        2,    /* MODE_GOLDEN_MV */
1292 50ba3fd7 Jason Garrett-Glaser
        1,    /* MODE_INTER_FOUR_MV */
1293
        3     /* MODE_COPY */
1294 d86053a4 Mike Melanson
    };
1295
    int current_frame_type;
1296
1297
    /* there is a last DC predictor for each of the 3 frame types */
1298
    short last_dc[3];
1299
1300
    int transform = 0;
1301
1302
    vul = vu = vur = vl = 0;
1303
    last_dc[0] = last_dc[1] = last_dc[2] = 0;
1304
1305
    /* for each fragment row... */
1306
    for (y = 0; y < fragment_height; y++) {
1307
1308
        /* for each fragment in a row... */
1309
        for (x = 0; x < fragment_width; x++, i++) {
1310
1311
            /* reverse prediction if this block was coded */
1312
            if (s->all_fragments[i].coding_method != MODE_COPY) {
1313
1314 115329f1 Diego Biurrun
                current_frame_type =
1315 d86053a4 Mike Melanson
                    compatible_frame[s->all_fragments[i].coding_method];
1316
1317 f72f8a77 Michael Niedermayer
                transform= 0;
1318
                if(x){
1319
                    l= i-1;
1320 7beddb12 Michael Niedermayer
                    vl = DC_COEFF(l);
1321 50ba3fd7 Jason Garrett-Glaser
                    if(COMPATIBLE_FRAME(l))
1322 006ff1ca Michael Niedermayer
                        transform |= PL;
1323 f72f8a77 Michael Niedermayer
                }
1324
                if(y){
1325
                    u= i-fragment_width;
1326 7beddb12 Michael Niedermayer
                    vu = DC_COEFF(u);
1327 50ba3fd7 Jason Garrett-Glaser
                    if(COMPATIBLE_FRAME(u))
1328 006ff1ca Michael Niedermayer
                        transform |= PU;
1329 f72f8a77 Michael Niedermayer
                    if(x){
1330
                        ul= i-fragment_width-1;
1331
                        vul = DC_COEFF(ul);
1332 50ba3fd7 Jason Garrett-Glaser
                        if(COMPATIBLE_FRAME(ul))
1333 006ff1ca Michael Niedermayer
                            transform |= PUL;
1334 f72f8a77 Michael Niedermayer
                    }
1335
                    if(x + 1 < fragment_width){
1336
                        ur= i-fragment_width+1;
1337
                        vur = DC_COEFF(ur);
1338 50ba3fd7 Jason Garrett-Glaser
                        if(COMPATIBLE_FRAME(ur))
1339 006ff1ca Michael Niedermayer
                            transform |= PUR;
1340 f72f8a77 Michael Niedermayer
                    }
1341 d86053a4 Mike Melanson
                }
1342
1343
                if (transform == 0) {
1344
1345
                    /* if there were no fragments to predict from, use last
1346
                     * DC saved */
1347 7beddb12 Michael Niedermayer
                    predicted_dc = last_dc[current_frame_type];
1348 d86053a4 Mike Melanson
                } else {
1349
1350
                    /* apply the appropriate predictor transform */
1351
                    predicted_dc =
1352
                        (predictor_transform[transform][0] * vul) +
1353
                        (predictor_transform[transform][1] * vu) +
1354
                        (predictor_transform[transform][2] * vur) +
1355
                        (predictor_transform[transform][3] * vl);
1356
1357 684d9e36 Michael Niedermayer
                    predicted_dc /= 128;
1358 d86053a4 Mike Melanson
1359
                    /* check for outranging on the [ul u l] and
1360
                     * [ul u ur l] predictors */
1361 c11cb375 Jason Garrett-Glaser
                    if ((transform == 15) || (transform == 13)) {
1362 c26abfa5 Diego Biurrun
                        if (FFABS(predicted_dc - vu) > 128)
1363 d86053a4 Mike Melanson
                            predicted_dc = vu;
1364 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vl) > 128)
1365 d86053a4 Mike Melanson
                            predicted_dc = vl;
1366 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vul) > 128)
1367 d86053a4 Mike Melanson
                            predicted_dc = vul;
1368
                    }
1369
                }
1370
1371 7beddb12 Michael Niedermayer
                /* at long last, apply the predictor */
1372
                if(s->coeffs[i].index){
1373
                    *s->next_coeff= s->coeffs[i];
1374
                    s->coeffs[i].index=0;
1375
                    s->coeffs[i].coeff=0;
1376
                    s->coeffs[i].next= s->next_coeff++;
1377
                }
1378
                s->coeffs[i].coeff += predicted_dc;
1379 d86053a4 Mike Melanson
                /* save the DC */
1380 7beddb12 Michael Niedermayer
                last_dc[current_frame_type] = DC_COEFF(i);
1381 36e16253 Reimar Döffinger
                if(DC_COEFF(i) && !(s->coeff_counts[i]&127)){
1382
                    s->coeff_counts[i]= 129;
1383 7beddb12 Michael Niedermayer
//                    s->all_fragments[i].next_coeff= s->next_coeff;
1384
                    s->coeffs[i].next= s->next_coeff;
1385
                    (s->next_coeff++)->next=NULL;
1386
                }
1387 d86053a4 Mike Melanson
            }
1388
        }
1389
    }
1390
}
1391
1392 256c0662 David Conrad
static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
1393 fe313556 David Conrad
{
1394
    int x, y;
1395
    int *bounding_values= s->bounding_values_array+127;
1396
1397 621f9a40 David Conrad
    int width           = s->fragment_width  >> !!plane;
1398
    int height          = s->fragment_height >> !!plane;
1399
    int fragment        = s->fragment_start        [plane] + ystart * width;
1400
    int stride          = s->current_frame.linesize[plane];
1401
    uint8_t *plane_data = s->current_frame.data    [plane];
1402
    if (!s->flipped_image) stride = -stride;
1403
1404
    for (y = ystart; y < yend; y++) {
1405
1406
        for (x = 0; x < width; x++) {
1407
            /* This code basically just deblocks on the edges of coded blocks.
1408
             * However, it has to be much more complicated because of the
1409
             * braindamaged deblock ordering used in VP3/Theora. Order matters
1410
             * because some pixels get filtered twice. */
1411
            if( s->all_fragments[fragment].coding_method != MODE_COPY )
1412
            {
1413
                /* do not perform left edge filter for left columns frags */
1414
                if (x > 0) {
1415
                    s->dsp.vp3_h_loop_filter(
1416
                        plane_data + s->all_fragments[fragment].first_pixel,
1417
                        stride, bounding_values);
1418
                }
1419 fe313556 David Conrad
1420 621f9a40 David Conrad
                /* do not perform top edge filter for top row fragments */
1421
                if (y > 0) {
1422
                    s->dsp.vp3_v_loop_filter(
1423
                        plane_data + s->all_fragments[fragment].first_pixel,
1424
                        stride, bounding_values);
1425
                }
1426 fe313556 David Conrad
1427 621f9a40 David Conrad
                /* do not perform right edge filter for right column
1428
                 * fragments or if right fragment neighbor is also coded
1429
                 * in this frame (it will be filtered in next iteration) */
1430
                if ((x < width - 1) &&
1431
                    (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1432
                    s->dsp.vp3_h_loop_filter(
1433
                        plane_data + s->all_fragments[fragment + 1].first_pixel,
1434
                        stride, bounding_values);
1435 fe313556 David Conrad
                }
1436
1437 621f9a40 David Conrad
                /* do not perform bottom edge filter for bottom row
1438
                 * fragments or if bottom fragment neighbor is also coded
1439
                 * in this frame (it will be filtered in the next row) */
1440
                if ((y < height - 1) &&
1441
                    (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1442
                    s->dsp.vp3_v_loop_filter(
1443
                        plane_data + s->all_fragments[fragment + width].first_pixel,
1444
                        stride, bounding_values);
1445
                }
1446 fe313556 David Conrad
            }
1447 621f9a40 David Conrad
1448
            fragment++;
1449 fe313556 David Conrad
        }
1450 621f9a40 David Conrad
    }
1451 fe313556 David Conrad
}
1452
1453 d86053a4 Mike Melanson
/*
1454 dc4b78d9 Mike Melanson
 * Perform the final rendering for a particular slice of data.
1455
 * The slice number ranges from 0..(macroblock_height - 1).
1456
 */
1457
static void render_slice(Vp3DecodeContext *s, int slice)
1458
{
1459 1abbf64e Michael Niedermayer
    int x;
1460 dc4b78d9 Mike Melanson
    int16_t *dequantizer;
1461 c6727809 Måns Rullgård
    DECLARE_ALIGNED_16(DCTELEM, block)[64];
1462 dc4b78d9 Mike Melanson
    int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1463
    int motion_halfpel_index;
1464
    uint8_t *motion_source;
1465
    int plane;
1466
    int current_macroblock_entry = slice * s->macroblock_width * 6;
1467
1468
    if (slice >= s->macroblock_height)
1469
        return;
1470
1471
    for (plane = 0; plane < 3; plane++) {
1472 1abbf64e Michael Niedermayer
        uint8_t *output_plane = s->current_frame.data    [plane];
1473
        uint8_t *  last_plane = s->   last_frame.data    [plane];
1474
        uint8_t *golden_plane = s-> golden_frame.data    [plane];
1475
        int stride            = s->current_frame.linesize[plane];
1476
        int plane_width       = s->width  >> !!plane;
1477
        int plane_height      = s->height >> !!plane;
1478
        int y =        slice *  FRAGMENT_PIXELS << !plane ;
1479
        int slice_height = y + (FRAGMENT_PIXELS << !plane);
1480
        int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
1481
1482
        if (!s->flipped_image) stride = -stride;
1483 dc4b78d9 Mike Melanson
1484 115329f1 Diego Biurrun
1485 c26abfa5 Diego Biurrun
        if(FFABS(stride) > 2048)
1486 dc4b78d9 Mike Melanson
            return; //various tables are fixed size
1487
1488
        /* for each fragment row in the slice (both of them)... */
1489
        for (; y < slice_height; y += 8) {
1490
1491
            /* for each fragment in a row... */
1492
            for (x = 0; x < plane_width; x += 8, i++) {
1493
1494
                if ((i < 0) || (i >= s->fragment_count)) {
1495
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:render_slice(): bad fragment number (%d)\n", i);
1496
                    return;
1497
                }
1498
1499
                /* transform if this block was coded */
1500
                if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1501
                    !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1502
1503
                    if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1504
                        (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1505
                        motion_source= golden_plane;
1506 115329f1 Diego Biurrun
                    else
1507 dc4b78d9 Mike Melanson
                        motion_source= last_plane;
1508
1509
                    motion_source += s->all_fragments[i].first_pixel;
1510
                    motion_halfpel_index = 0;
1511
1512
                    /* sort out the motion vector if this fragment is coded
1513
                     * using a motion vector method */
1514
                    if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1515
                        (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1516
                        int src_x, src_y;
1517
                        motion_x = s->all_fragments[i].motion_x;
1518
                        motion_y = s->all_fragments[i].motion_y;
1519
                        if(plane){
1520
                            motion_x= (motion_x>>1) | (motion_x&1);
1521
                            motion_y= (motion_y>>1) | (motion_y&1);
1522
                        }
1523
1524
                        src_x= (motion_x>>1) + x;
1525
                        src_y= (motion_y>>1) + y;
1526
                        if ((motion_x == 127) || (motion_y == 127))
1527
                            av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1528
1529
                        motion_halfpel_index = motion_x & 0x01;
1530
                        motion_source += (motion_x >> 1);
1531
1532
                        motion_halfpel_index |= (motion_y & 0x01) << 1;
1533
                        motion_source += ((motion_y >> 1) * stride);
1534
1535
                        if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1536
                            uint8_t *temp= s->edge_emu_buffer;
1537
                            if(stride<0) temp -= 9*stride;
1538
                            else temp += 9*stride;
1539
1540
                            ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1541
                            motion_source= temp;
1542
                        }
1543
                    }
1544 115329f1 Diego Biurrun
1545 dc4b78d9 Mike Melanson
1546
                    /* first, take care of copying a block from either the
1547
                     * previous or the golden frame */
1548
                    if (s->all_fragments[i].coding_method != MODE_INTRA) {
1549 115329f1 Diego Biurrun
                        /* Note, it is possible to implement all MC cases with
1550
                           put_no_rnd_pixels_l2 which would look more like the
1551
                           VP3 source but this would be slower as
1552 dc4b78d9 Mike Melanson
                           put_no_rnd_pixels_tab is better optimzed */
1553
                        if(motion_halfpel_index != 3){
1554
                            s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1555
                                output_plane + s->all_fragments[i].first_pixel,
1556
                                motion_source, stride, 8);
1557
                        }else{
1558
                            int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1559
                            s->dsp.put_no_rnd_pixels_l2[1](
1560
                                output_plane + s->all_fragments[i].first_pixel,
1561 115329f1 Diego Biurrun
                                motion_source - d,
1562
                                motion_source + stride + 1 + d,
1563 dc4b78d9 Mike Melanson
                                stride, 8);
1564
                        }
1565 f2264fa5 David Conrad
                        dequantizer = s->qmat[s->all_fragments[i].qpi][1][plane];
1566 dc4b78d9 Mike Melanson
                    }else{
1567 f2264fa5 David Conrad
                        dequantizer = s->qmat[s->all_fragments[i].qpi][0][plane];
1568 dc4b78d9 Mike Melanson
                    }
1569
1570
                    /* dequantize the DCT coefficients */
1571
                    if(s->avctx->idct_algo==FF_IDCT_VP3){
1572
                        Coeff *coeff= s->coeffs + i;
1573 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1574 dc4b78d9 Mike Melanson
                        while(coeff->next){
1575
                            block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1576
                            coeff= coeff->next;
1577
                        }
1578
                    }else{
1579
                        Coeff *coeff= s->coeffs + i;
1580 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1581 dc4b78d9 Mike Melanson
                        while(coeff->next){
1582
                            block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1583
                            coeff= coeff->next;
1584
                        }
1585
                    }
1586
1587
                    /* invert DCT and place (or add) in final output */
1588 115329f1 Diego Biurrun
1589 dc4b78d9 Mike Melanson
                    if (s->all_fragments[i].coding_method == MODE_INTRA) {
1590
                        if(s->avctx->idct_algo!=FF_IDCT_VP3)
1591
                            block[0] += 128<<3;
1592
                        s->dsp.idct_put(
1593
                            output_plane + s->all_fragments[i].first_pixel,
1594
                            stride,
1595
                            block);
1596
                    } else {
1597
                        s->dsp.idct_add(
1598
                            output_plane + s->all_fragments[i].first_pixel,
1599
                            stride,
1600
                            block);
1601
                    }
1602
                } else {
1603
1604
                    /* copy directly from the previous frame */
1605
                    s->dsp.put_pixels_tab[1][0](
1606
                        output_plane + s->all_fragments[i].first_pixel,
1607
                        last_plane + s->all_fragments[i].first_pixel,
1608
                        stride, 8);
1609
1610
                }
1611
            }
1612 256c0662 David Conrad
            // Filter the previous block row. We can't filter the current row yet
1613
            // since it needs pixels from the next row
1614
            if (y > 0)
1615
                apply_loop_filter(s, plane, (y>>3)-1, (y>>3));
1616 dc4b78d9 Mike Melanson
        }
1617
    }
1618
1619
     /* this looks like a good place for slice dispatch... */
1620
     /* algorithm:
1621
      *   if (slice == s->macroblock_height - 1)
1622 f44b08a5 Mike Melanson
      *     dispatch (both last slice & 2nd-to-last slice);
1623
      *   else if (slice > 0)
1624
      *     dispatch (slice - 1);
1625 dc4b78d9 Mike Melanson
      */
1626
1627
    emms_c();
1628
}
1629
1630 115329f1 Diego Biurrun
/*
1631 d86053a4 Mike Melanson
 * This function computes the first pixel addresses for each fragment.
1632
 * This function needs to be invoked after the first frame is allocated
1633
 * so that it has access to the plane strides.
1634
 */
1635 115329f1 Diego Biurrun
static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
1636 d86053a4 Mike Melanson
{
1637 fc961819 David Conrad
#define Y_INITIAL(chroma_shift)  s->flipped_image ? 1  : s->fragment_height >> chroma_shift
1638
#define Y_FINISHED(chroma_shift) s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0
1639 d86053a4 Mike Melanson
1640
    int i, x, y;
1641 fc961819 David Conrad
    const int y_inc = s->flipped_image ? 1 : -1;
1642 d86053a4 Mike Melanson
1643
    /* figure out the first pixel addresses for each of the fragments */
1644
    /* Y plane */
1645
    i = 0;
1646 fc961819 David Conrad
    for (y = Y_INITIAL(0); Y_FINISHED(0); y += y_inc) {
1647 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width; x++) {
1648 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1649 d86053a4 Mike Melanson
                s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
1650
                    s->golden_frame.linesize[0] +
1651
                    x * FRAGMENT_PIXELS;
1652
        }
1653
    }
1654
1655
    /* U plane */
1656 1abbf64e Michael Niedermayer
    i = s->fragment_start[1];
1657 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1658 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width / 2; x++) {
1659 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1660 d86053a4 Mike Melanson
                s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
1661
                    s->golden_frame.linesize[1] +
1662
                    x * FRAGMENT_PIXELS;
1663
        }
1664
    }
1665
1666
    /* V plane */
1667 1abbf64e Michael Niedermayer
    i = s->fragment_start[2];
1668 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1669 9a7ad925 Alex Beregszaszi
        for (x = 0; x < s->fragment_width / 2; x++) {
1670 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1671 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
1672
                    s->golden_frame.linesize[2] +
1673
                    x * FRAGMENT_PIXELS;
1674
        }
1675
    }
1676
}
1677
1678 d86053a4 Mike Melanson
/*
1679
 * This is the ffmpeg/libavcodec API init function.
1680
 */
1681 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_init(AVCodecContext *avctx)
1682 d86053a4 Mike Melanson
{
1683
    Vp3DecodeContext *s = avctx->priv_data;
1684 ae1dd8e1 Michael Niedermayer
    int i, inter, plane;
1685 892fc83e Mike Melanson
    int c_width;
1686
    int c_height;
1687
    int y_superblock_count;
1688
    int c_superblock_count;
1689 d86053a4 Mike Melanson
1690 3c3f113e Alex Beregszaszi
    if (avctx->codec_tag == MKTAG('V','P','3','0'))
1691 bb270c08 Diego Biurrun
        s->version = 0;
1692 3c3f113e Alex Beregszaszi
    else
1693 bb270c08 Diego Biurrun
        s->version = 1;
1694 3c3f113e Alex Beregszaszi
1695 d86053a4 Mike Melanson
    s->avctx = avctx;
1696 ef516f73 David Conrad
    s->width = FFALIGN(avctx->width, 16);
1697
    s->height = FFALIGN(avctx->height, 16);
1698 d86053a4 Mike Melanson
    avctx->pix_fmt = PIX_FMT_YUV420P;
1699 580a7465 David Conrad
    avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
1700 8b6103da Michael Niedermayer
    if(avctx->idct_algo==FF_IDCT_AUTO)
1701
        avctx->idct_algo=FF_IDCT_VP3;
1702 d86053a4 Mike Melanson
    dsputil_init(&s->dsp, avctx);
1703 115329f1 Diego Biurrun
1704 36af0c95 Michael Niedermayer
    ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
1705 d86053a4 Mike Melanson
1706
    /* initialize to an impossible value which will force a recalculation
1707
     * in the first frame decode */
1708 f2264fa5 David Conrad
    for (i = 0; i < 3; i++)
1709
        s->qps[i] = -1;
1710 d86053a4 Mike Melanson
1711 892fc83e Mike Melanson
    s->y_superblock_width = (s->width + 31) / 32;
1712
    s->y_superblock_height = (s->height + 31) / 32;
1713
    y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1714
1715
    /* work out the dimensions for the C planes */
1716
    c_width = s->width / 2;
1717
    c_height = s->height / 2;
1718
    s->c_superblock_width = (c_width + 31) / 32;
1719
    s->c_superblock_height = (c_height + 31) / 32;
1720
    c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1721
1722
    s->superblock_count = y_superblock_count + (c_superblock_count * 2);
1723
    s->u_superblock_start = y_superblock_count;
1724
    s->v_superblock_start = s->u_superblock_start + c_superblock_count;
1725 d86053a4 Mike Melanson
    s->superblock_coding = av_malloc(s->superblock_count);
1726
1727
    s->macroblock_width = (s->width + 15) / 16;
1728
    s->macroblock_height = (s->height + 15) / 16;
1729
    s->macroblock_count = s->macroblock_width * s->macroblock_height;
1730
1731
    s->fragment_width = s->width / FRAGMENT_PIXELS;
1732
    s->fragment_height = s->height / FRAGMENT_PIXELS;
1733
1734
    /* fragment count covers all 8x8 blocks for all 3 planes */
1735
    s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
1736 1abbf64e Michael Niedermayer
    s->fragment_start[1] = s->fragment_width * s->fragment_height;
1737
    s->fragment_start[2] = s->fragment_width * s->fragment_height * 5 / 4;
1738 d86053a4 Mike Melanson
1739
    s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
1740 36e16253 Reimar Döffinger
    s->coeff_counts = av_malloc(s->fragment_count * sizeof(*s->coeff_counts));
1741 7beddb12 Michael Niedermayer
    s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
1742 d86053a4 Mike Melanson
    s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
1743 098523eb Mike Melanson
    s->fast_fragment_list = av_malloc(s->fragment_count * sizeof(int));
1744 5e534865 Diego Biurrun
    s->pixel_addresses_initialized = 0;
1745 0efbd068 Mike Melanson
    if (!s->superblock_coding || !s->all_fragments || !s->coeff_counts ||
1746 098523eb Mike Melanson
        !s->coeffs || !s->coded_fragment_list || !s->fast_fragment_list) {
1747 0efbd068 Mike Melanson
        vp3_decode_end(avctx);
1748
        return -1;
1749
    }
1750 d86053a4 Mike Melanson
1751 f44ee2c3 Alex Beregszaszi
    if (!s->theora_tables)
1752
    {
1753 2287c100 Michael Niedermayer
        for (i = 0; i < 64; i++) {
1754 bb270c08 Diego Biurrun
            s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
1755
            s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
1756 ae1dd8e1 Michael Niedermayer
            s->base_matrix[0][i] = vp31_intra_y_dequant[i];
1757
            s->base_matrix[1][i] = vp31_intra_c_dequant[i];
1758
            s->base_matrix[2][i] = vp31_inter_dequant[i];
1759 bb270c08 Diego Biurrun
            s->filter_limit_values[i] = vp31_filter_limit_values[i];
1760 2287c100 Michael Niedermayer
        }
1761 f44ee2c3 Alex Beregszaszi
1762 ae1dd8e1 Michael Niedermayer
        for(inter=0; inter<2; inter++){
1763
            for(plane=0; plane<3; plane++){
1764
                s->qr_count[inter][plane]= 1;
1765
                s->qr_size [inter][plane][0]= 63;
1766
                s->qr_base [inter][plane][0]=
1767
                s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1768
            }
1769
        }
1770
1771 39922395 Mike Melanson
        /* init VLC tables */
1772
        for (i = 0; i < 16; i++) {
1773
1774
            /* DC histograms */
1775
            init_vlc(&s->dc_vlc[i], 5, 32,
1776
                &dc_bias[i][0][1], 4, 2,
1777
                &dc_bias[i][0][0], 4, 2, 0);
1778
1779
            /* group 1 AC histograms */
1780
            init_vlc(&s->ac_vlc_1[i], 5, 32,
1781
                &ac_bias_0[i][0][1], 4, 2,
1782
                &ac_bias_0[i][0][0], 4, 2, 0);
1783
1784
            /* group 2 AC histograms */
1785
            init_vlc(&s->ac_vlc_2[i], 5, 32,
1786
                &ac_bias_1[i][0][1], 4, 2,
1787
                &ac_bias_1[i][0][0], 4, 2, 0);
1788
1789
            /* group 3 AC histograms */
1790
            init_vlc(&s->ac_vlc_3[i], 5, 32,
1791
                &ac_bias_2[i][0][1], 4, 2,
1792
                &ac_bias_2[i][0][0], 4, 2, 0);
1793
1794
            /* group 4 AC histograms */
1795
            init_vlc(&s->ac_vlc_4[i], 5, 32,
1796
                &ac_bias_3[i][0][1], 4, 2,
1797
                &ac_bias_3[i][0][0], 4, 2, 0);
1798
        }
1799
    } else {
1800
        for (i = 0; i < 16; i++) {
1801
1802
            /* DC histograms */
1803 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->dc_vlc[i], 5, 32,
1804 39922395 Mike Melanson
                &s->huffman_table[i][0][1], 4, 2,
1805 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i][0][0], 4, 2, 0) < 0)
1806
                goto vlc_fail;
1807 39922395 Mike Melanson
1808
            /* group 1 AC histograms */
1809 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_1[i], 5, 32,
1810 39922395 Mike Melanson
                &s->huffman_table[i+16][0][1], 4, 2,
1811 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16][0][0], 4, 2, 0) < 0)
1812
                goto vlc_fail;
1813 39922395 Mike Melanson
1814
            /* group 2 AC histograms */
1815 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_2[i], 5, 32,
1816 39922395 Mike Melanson
                &s->huffman_table[i+16*2][0][1], 4, 2,
1817 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*2][0][0], 4, 2, 0) < 0)
1818
                goto vlc_fail;
1819 39922395 Mike Melanson
1820
            /* group 3 AC histograms */
1821 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_3[i], 5, 32,
1822 39922395 Mike Melanson
                &s->huffman_table[i+16*3][0][1], 4, 2,
1823 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*3][0][0], 4, 2, 0) < 0)
1824
                goto vlc_fail;
1825 39922395 Mike Melanson
1826
            /* group 4 AC histograms */
1827 c4b7b8bf Reimar Döffinger
            if (init_vlc(&s->ac_vlc_4[i], 5, 32,
1828 39922395 Mike Melanson
                &s->huffman_table[i+16*4][0][1], 4, 2,
1829 c4b7b8bf Reimar Döffinger
                &s->huffman_table[i+16*4][0][0], 4, 2, 0) < 0)
1830
                goto vlc_fail;
1831 39922395 Mike Melanson
        }
1832 d86053a4 Mike Melanson
    }
1833
1834 d8278bab Mike Melanson
    init_vlc(&s->superblock_run_length_vlc, 6, 34,
1835
        &superblock_run_length_vlc_table[0][1], 4, 2,
1836
        &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1837
1838 dd36b667 Alex Beregszaszi
    init_vlc(&s->fragment_run_length_vlc, 5, 30,
1839 0ad72bdd Mike Melanson
        &fragment_run_length_vlc_table[0][1], 4, 2,
1840
        &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1841
1842
    init_vlc(&s->mode_code_vlc, 3, 8,
1843
        &mode_code_vlc_table[0][1], 2, 1,
1844
        &mode_code_vlc_table[0][0], 2, 1, 0);
1845
1846
    init_vlc(&s->motion_vector_vlc, 6, 63,
1847
        &motion_vector_vlc_table[0][1], 2, 1,
1848
        &motion_vector_vlc_table[0][0], 2, 1, 0);
1849
1850 d86053a4 Mike Melanson
    /* work out the block mapping tables */
1851
    s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1852
    s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
1853
    s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
1854 96a7e73b Mike Melanson
    s->macroblock_coding = av_malloc(s->macroblock_count + 1);
1855 0efbd068 Mike Melanson
    if (!s->superblock_fragments || !s->superblock_macroblocks ||
1856
        !s->macroblock_fragments || !s->macroblock_coding) {
1857
        vp3_decode_end(avctx);
1858
        return -1;
1859
    }
1860 d86053a4 Mike Melanson
    init_block_mapping(s);
1861
1862 44ae98dd Mike Melanson
    for (i = 0; i < 3; i++) {
1863
        s->current_frame.data[i] = NULL;
1864
        s->last_frame.data[i] = NULL;
1865
        s->golden_frame.data[i] = NULL;
1866 61873c4a Mike Melanson
    }
1867
1868 d86053a4 Mike Melanson
    return 0;
1869 c4b7b8bf Reimar Döffinger
1870
vlc_fail:
1871
    av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
1872
    return -1;
1873 d86053a4 Mike Melanson
}
1874
1875
/*
1876
 * This is the ffmpeg/libavcodec API frame decode function.
1877
 */
1878 115329f1 Diego Biurrun
static int vp3_decode_frame(AVCodecContext *avctx,
1879 d86053a4 Mike Melanson
                            void *data, int *data_size,
1880 7a00bbad Thilo Borgmann
                            AVPacket *avpkt)
1881 d86053a4 Mike Melanson
{
1882 7a00bbad Thilo Borgmann
    const uint8_t *buf = avpkt->data;
1883
    int buf_size = avpkt->size;
1884 d86053a4 Mike Melanson
    Vp3DecodeContext *s = avctx->priv_data;
1885
    GetBitContext gb;
1886
    static int counter = 0;
1887 dc4b78d9 Mike Melanson
    int i;
1888 d86053a4 Mike Melanson
1889
    init_get_bits(&gb, buf, buf_size * 8);
1890 115329f1 Diego Biurrun
1891 f44ee2c3 Alex Beregszaszi
    if (s->theora && get_bits1(&gb))
1892
    {
1893 bb270c08 Diego Biurrun
        av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1894
        return -1;
1895 f44ee2c3 Alex Beregszaszi
    }
1896 3c3f113e Alex Beregszaszi
1897
    s->keyframe = !get_bits1(&gb);
1898
    if (!s->theora)
1899 bb270c08 Diego Biurrun
        skip_bits(&gb, 1);
1900 f2264fa5 David Conrad
    for (i = 0; i < 3; i++)
1901
        s->last_qps[i] = s->qps[i];
1902 efea8528 Michael Niedermayer
1903 f2264fa5 David Conrad
    s->nqps=0;
1904 efea8528 Michael Niedermayer
    do{
1905 f2264fa5 David Conrad
        s->qps[s->nqps++]= get_bits(&gb, 6);
1906
    } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
1907
    for (i = s->nqps; i < 3; i++)
1908
        s->qps[i] = -1;
1909 d86053a4 Mike Melanson
1910 f8830383 Alex Beregszaszi
    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1911 bb270c08 Diego Biurrun
        av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
1912 f2264fa5 David Conrad
            s->keyframe?"key":"", counter, s->qps[0]);
1913 d86053a4 Mike Melanson
    counter++;
1914
1915 f2264fa5 David Conrad
    if (s->qps[0] != s->last_qps[0])
1916 f44b08a5 Mike Melanson
        init_loop_filter(s);
1917 f2264fa5 David Conrad
1918
    for (i = 0; i < s->nqps; i++)
1919
        // reinit all dequantizers if the first one changed, because
1920
        // the DC of the first quantizer must be used for all matrices
1921
        if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
1922
            init_dequantizer(s, i);
1923 642d7e84 Mike Melanson
1924 068e82ba David Conrad
    if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1925
        return buf_size;
1926
1927 d86053a4 Mike Melanson
    if (s->keyframe) {
1928 bb270c08 Diego Biurrun
        if (!s->theora)
1929
        {
1930
            skip_bits(&gb, 4); /* width code */
1931
            skip_bits(&gb, 4); /* height code */
1932
            if (s->version)
1933
            {
1934
                s->version = get_bits(&gb, 5);
1935
                if (counter == 1)
1936
                    av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1937
            }
1938
        }
1939
        if (s->version || s->theora)
1940
        {
1941
                if (get_bits1(&gb))
1942
                    av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1943
            skip_bits(&gb, 2); /* reserved? */
1944
        }
1945 3c3f113e Alex Beregszaszi
1946 74c0ac12 Mike Melanson
        if (s->last_frame.data[0] == s->golden_frame.data[0]) {
1947
            if (s->golden_frame.data[0])
1948
                avctx->release_buffer(avctx, &s->golden_frame);
1949 8e39d4a7 Michael Niedermayer
            s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
1950 74c0ac12 Mike Melanson
        } else {
1951
            if (s->golden_frame.data[0])
1952
                avctx->release_buffer(avctx, &s->golden_frame);
1953
            if (s->last_frame.data[0])
1954
                avctx->release_buffer(avctx, &s->last_frame);
1955
        }
1956 d86053a4 Mike Melanson
1957 8e39d4a7 Michael Niedermayer
        s->golden_frame.reference = 3;
1958 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
1959 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
1960 d86053a4 Mike Melanson
            return -1;
1961
        }
1962
1963
        /* golden frame is also the current frame */
1964 4501e678 Michael Niedermayer
        s->current_frame= s->golden_frame;
1965 d86053a4 Mike Melanson
1966
        /* time to figure out pixel addresses? */
1967 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized)
1968 bb270c08 Diego Biurrun
        {
1969 ba31df31 David Conrad
            vp3_calculate_pixel_addresses(s);
1970 5e534865 Diego Biurrun
            s->pixel_addresses_initialized = 1;
1971 bb270c08 Diego Biurrun
        }
1972 d86053a4 Mike Melanson
    } else {
1973
        /* allocate a new current frame */
1974 8e39d4a7 Michael Niedermayer
        s->current_frame.reference = 3;
1975 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized) {
1976 bc185f72 Reimar Döffinger
            av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n");
1977
            return -1;
1978
        }
1979 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
1980 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
1981 d86053a4 Mike Melanson
            return -1;
1982
        }
1983
    }
1984
1985 b928ec64 Michael Niedermayer
    s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
1986
    s->current_frame.qstride= 0;
1987
1988 d86053a4 Mike Melanson
    init_frame(s, &gb);
1989
1990 220a6f40 Michael Niedermayer
    if (unpack_superblocks(s, &gb)){
1991
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
1992
        return -1;
1993
    }
1994
    if (unpack_modes(s, &gb)){
1995
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
1996
        return -1;
1997
    }
1998
    if (unpack_vectors(s, &gb)){
1999
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
2000
        return -1;
2001
    }
2002 f2264fa5 David Conrad
    if (unpack_block_qpis(s, &gb)){
2003
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
2004
        return -1;
2005
    }
2006 220a6f40 Michael Niedermayer
    if (unpack_dct_coeffs(s, &gb)){
2007
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
2008 892fc83e Mike Melanson
        return -1;
2009
    }
2010 d86053a4 Mike Melanson
2011 dc4b78d9 Mike Melanson
    for (i = 0; i < s->macroblock_height; i++)
2012
        render_slice(s, i);
2013 d86053a4 Mike Melanson
2014 256c0662 David Conrad
    // filter the last row
2015
    for (i = 0; i < 3; i++) {
2016
        int row = (s->height >> (3+!!i)) - 1;
2017
        apply_loop_filter(s, i, row, row+1);
2018
    }
2019 892fc83e Mike Melanson
2020 d86053a4 Mike Melanson
    *data_size=sizeof(AVFrame);
2021
    *(AVFrame*)data= s->current_frame;
2022
2023 44ae98dd Mike Melanson
    /* release the last frame, if it is allocated and if it is not the
2024
     * golden frame */
2025
    if ((s->last_frame.data[0]) &&
2026
        (s->last_frame.data[0] != s->golden_frame.data[0]))
2027
        avctx->release_buffer(avctx, &s->last_frame);
2028 d86053a4 Mike Melanson
2029 61873c4a Mike Melanson
    /* shuffle frames (last = current) */
2030 4501e678 Michael Niedermayer
    s->last_frame= s->current_frame;
2031 8e39d4a7 Michael Niedermayer
    s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
2032 d86053a4 Mike Melanson
2033
    return buf_size;
2034
}
2035
2036
/*
2037
 * This is the ffmpeg/libavcodec API module cleanup function.
2038
 */
2039 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_end(AVCodecContext *avctx)
2040 d86053a4 Mike Melanson
{
2041
    Vp3DecodeContext *s = avctx->priv_data;
2042 6f4e2b5a Måns Rullgård
    int i;
2043 d86053a4 Mike Melanson
2044 6f4e2b5a Måns Rullgård
    av_free(s->superblock_coding);
2045 d86053a4 Mike Melanson
    av_free(s->all_fragments);
2046 36e16253 Reimar Döffinger
    av_free(s->coeff_counts);
2047 a2df5a50 Michael Niedermayer
    av_free(s->coeffs);
2048 d86053a4 Mike Melanson
    av_free(s->coded_fragment_list);
2049 098523eb Mike Melanson
    av_free(s->fast_fragment_list);
2050 d86053a4 Mike Melanson
    av_free(s->superblock_fragments);
2051
    av_free(s->superblock_macroblocks);
2052
    av_free(s->macroblock_fragments);
2053 96a7e73b Mike Melanson
    av_free(s->macroblock_coding);
2054 115329f1 Diego Biurrun
2055 6f4e2b5a Måns Rullgård
    for (i = 0; i < 16; i++) {
2056
        free_vlc(&s->dc_vlc[i]);
2057
        free_vlc(&s->ac_vlc_1[i]);
2058
        free_vlc(&s->ac_vlc_2[i]);
2059
        free_vlc(&s->ac_vlc_3[i]);
2060
        free_vlc(&s->ac_vlc_4[i]);
2061
    }
2062
2063
    free_vlc(&s->superblock_run_length_vlc);
2064
    free_vlc(&s->fragment_run_length_vlc);
2065
    free_vlc(&s->mode_code_vlc);
2066
    free_vlc(&s->motion_vector_vlc);
2067
2068 d86053a4 Mike Melanson
    /* release all frames */
2069 8e39d4a7 Michael Niedermayer
    if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
2070 892fc83e Mike Melanson
        avctx->release_buffer(avctx, &s->golden_frame);
2071
    if (s->last_frame.data[0])
2072
        avctx->release_buffer(avctx, &s->last_frame);
2073
    /* no need to release the current_frame since it will always be pointing
2074
     * to the same frame as either the golden or last frame */
2075 d86053a4 Mike Melanson
2076
    return 0;
2077
}
2078
2079 39922395 Mike Melanson
static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
2080
{
2081
    Vp3DecodeContext *s = avctx->priv_data;
2082
2083 5fc32c27 Alex Beregszaszi
    if (get_bits1(gb)) {
2084 39922395 Mike Melanson
        int token;
2085
        if (s->entries >= 32) { /* overflow */
2086
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2087
            return -1;
2088
        }
2089
        token = get_bits(gb, 5);
2090
        //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);
2091
        s->huffman_table[s->hti][token][0] = s->hbits;
2092
        s->huffman_table[s->hti][token][1] = s->huff_code_size;
2093
        s->entries++;
2094
    }
2095
    else {
2096
        if (s->huff_code_size >= 32) {/* overflow */
2097
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2098
            return -1;
2099
        }
2100
        s->huff_code_size++;
2101
        s->hbits <<= 1;
2102 00bbe276 Alex Converse
        if (read_huffman_tree(avctx, gb))
2103
            return -1;
2104 39922395 Mike Melanson
        s->hbits |= 1;
2105 00bbe276 Alex Converse
        if (read_huffman_tree(avctx, gb))
2106
            return -1;
2107 39922395 Mike Melanson
        s->hbits >>= 1;
2108
        s->huff_code_size--;
2109
    }
2110
    return 0;
2111
}
2112
2113 b250f9c6 Aurelien Jacobs
#if CONFIG_THEORA_DECODER
2114 e278056f Michael Niedermayer
static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2115 f44ee2c3 Alex Beregszaszi
{
2116
    Vp3DecodeContext *s = avctx->priv_data;
2117 ea3c2d53 David Conrad
    int visible_width, visible_height, colorspace;
2118 9a7ad925 Alex Beregszaszi
2119 e278056f Michael Niedermayer
    s->theora = get_bits_long(gb, 24);
2120 356306ac Diego Biurrun
    av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2121 105c3d25 Alex Beregszaszi
2122 ba7ee4a4 Matthieu Castet
    /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
2123 9a7ad925 Alex Beregszaszi
    /* but previous versions have the image flipped relative to vp3 */
2124 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2125 9a7ad925 Alex Beregszaszi
    {
2126 bb270c08 Diego Biurrun
        s->flipped_image = 1;
2127 9a7ad925 Alex Beregszaszi
        av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2128
    }
2129 f44ee2c3 Alex Beregszaszi
2130 277e3e53 David Conrad
    visible_width  = s->width  = get_bits(gb, 16) << 4;
2131
    visible_height = s->height = get_bits(gb, 16) << 4;
2132 115329f1 Diego Biurrun
2133 0ecca7a4 Michael Niedermayer
    if(avcodec_check_dimensions(avctx, s->width, s->height)){
2134 7146d2c2 Alex Beregszaszi
        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
2135 0ecca7a4 Michael Niedermayer
        s->width= s->height= 0;
2136
        return -1;
2137
    }
2138 7146d2c2 Alex Beregszaszi
2139 277e3e53 David Conrad
    if (s->theora >= 0x030200) {
2140 a0ce2d1b David Conrad
        visible_width  = get_bits_long(gb, 24);
2141
        visible_height = get_bits_long(gb, 24);
2142 c0f716b8 Aurelien Jacobs
2143 ba4816a0 Aurelien Jacobs
        skip_bits(gb, 8); /* offset x */
2144
        skip_bits(gb, 8); /* offset y */
2145
    }
2146 f44ee2c3 Alex Beregszaszi
2147 e278056f Michael Niedermayer
    skip_bits(gb, 32); /* fps numerator */
2148
    skip_bits(gb, 32); /* fps denumerator */
2149
    skip_bits(gb, 24); /* aspect numerator */
2150
    skip_bits(gb, 24); /* aspect denumerator */
2151 115329f1 Diego Biurrun
2152 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2153 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2154 ea3c2d53 David Conrad
    colorspace = get_bits(gb, 8);
2155 e278056f Michael Niedermayer
    skip_bits(gb, 24); /* bitrate */
2156 f44ee2c3 Alex Beregszaszi
2157 e278056f Michael Niedermayer
    skip_bits(gb, 6); /* quality hint */
2158 115329f1 Diego Biurrun
2159 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2160 105c3d25 Alex Beregszaszi
    {
2161 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2162 337f5c6e David Conrad
        skip_bits(gb, 2); /* pixel format: 420,res,422,444 */
2163
        skip_bits(gb, 3); /* reserved */
2164 105c3d25 Alex Beregszaszi
    }
2165 115329f1 Diego Biurrun
2166 e278056f Michael Niedermayer
//    align_get_bits(gb);
2167 115329f1 Diego Biurrun
2168 c0f716b8 Aurelien Jacobs
    if (   visible_width  <= s->width  && visible_width  > s->width-16
2169
        && visible_height <= s->height && visible_height > s->height-16)
2170
        avcodec_set_dimensions(avctx, visible_width, visible_height);
2171
    else
2172
        avcodec_set_dimensions(avctx, s->width, s->height);
2173 f44ee2c3 Alex Beregszaszi
2174 ea3c2d53 David Conrad
    if (colorspace == 1) {
2175
        avctx->color_primaries = AVCOL_PRI_BT470M;
2176
    } else if (colorspace == 2) {
2177
        avctx->color_primaries = AVCOL_PRI_BT470BG;
2178
    }
2179
    if (colorspace == 1 || colorspace == 2) {
2180
        avctx->colorspace = AVCOL_SPC_BT470BG;
2181
        avctx->color_trc  = AVCOL_TRC_BT709;
2182
    }
2183
2184 f44ee2c3 Alex Beregszaszi
    return 0;
2185
}
2186
2187 e278056f Michael Niedermayer
static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2188 f44ee2c3 Alex Beregszaszi
{
2189
    Vp3DecodeContext *s = avctx->priv_data;
2190 ae1dd8e1 Michael Niedermayer
    int i, n, matrices, inter, plane;
2191 ba7ee4a4 Matthieu Castet
2192
    if (s->theora >= 0x030200) {
2193 e278056f Michael Niedermayer
        n = get_bits(gb, 3);
2194 9c7154c7 Mike Melanson
        /* loop filter limit values table */
2195 e13cca4b Reimar Döffinger
        for (i = 0; i < 64; i++) {
2196 e278056f Michael Niedermayer
            s->filter_limit_values[i] = get_bits(gb, n);
2197 e13cca4b Reimar Döffinger
            if (s->filter_limit_values[i] > 127) {
2198
                av_log(avctx, AV_LOG_ERROR, "filter limit value too large (%i > 127), clamping\n", s->filter_limit_values[i]);
2199
                s->filter_limit_values[i] = 127;
2200
            }
2201
        }
2202 ba7ee4a4 Matthieu Castet
    }
2203 115329f1 Diego Biurrun
2204 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2205 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2206 ba7ee4a4 Matthieu Castet
    else
2207
        n = 16;
2208 f44ee2c3 Alex Beregszaszi
    /* quality threshold table */
2209
    for (i = 0; i < 64; i++)
2210 e278056f Michael Niedermayer
        s->coded_ac_scale_factor[i] = get_bits(gb, n);
2211 f44ee2c3 Alex Beregszaszi
2212 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2213 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2214 ba7ee4a4 Matthieu Castet
    else
2215
        n = 16;
2216 f44ee2c3 Alex Beregszaszi
    /* dc scale factor table */
2217
    for (i = 0; i < 64; i++)
2218 e278056f Michael Niedermayer
        s->coded_dc_scale_factor[i] = get_bits(gb, n);
2219 f44ee2c3 Alex Beregszaszi
2220 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2221 e278056f Michael Niedermayer
        matrices = get_bits(gb, 9) + 1;
2222 ba7ee4a4 Matthieu Castet
    else
2223 2da2ba03 Matthieu Castet
        matrices = 3;
2224 f44ee2c3 Alex Beregszaszi
2225 ae1dd8e1 Michael Niedermayer
    if(matrices > 384){
2226
        av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2227
        return -1;
2228
    }
2229 3c3f113e Alex Beregszaszi
2230 ae1dd8e1 Michael Niedermayer
    for(n=0; n<matrices; n++){
2231 bb270c08 Diego Biurrun
        for (i = 0; i < 64; i++)
2232 ae1dd8e1 Michael Niedermayer
            s->base_matrix[n][i]= get_bits(gb, 8);
2233
    }
2234 2da2ba03 Matthieu Castet
2235 ae1dd8e1 Michael Niedermayer
    for (inter = 0; inter <= 1; inter++) {
2236
        for (plane = 0; plane <= 2; plane++) {
2237
            int newqr= 1;
2238
            if (inter || plane > 0)
2239 5fc32c27 Alex Beregszaszi
                newqr = get_bits1(gb);
2240 39922395 Mike Melanson
            if (!newqr) {
2241 ae1dd8e1 Michael Niedermayer
                int qtj, plj;
2242 5fc32c27 Alex Beregszaszi
                if(inter && get_bits1(gb)){
2243 ae1dd8e1 Michael Niedermayer
                    qtj = 0;
2244
                    plj = plane;
2245
                }else{
2246
                    qtj= (3*inter + plane - 1) / 3;
2247
                    plj= (plane + 2) % 3;
2248
                }
2249
                s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2250
                memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2251
                memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2252
            } else {
2253
                int qri= 0;
2254 39922395 Mike Melanson
                int qi = 0;
2255 ae1dd8e1 Michael Niedermayer
2256
                for(;;){
2257
                    i= get_bits(gb, av_log2(matrices-1)+1);
2258
                    if(i>= matrices){
2259
                        av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2260
                        return -1;
2261
                    }
2262
                    s->qr_base[inter][plane][qri]= i;
2263
                    if(qi >= 63)
2264
                        break;
2265
                    i = get_bits(gb, av_log2(63-qi)+1) + 1;
2266
                    s->qr_size[inter][plane][qri++]= i;
2267
                    qi += i;
2268 39922395 Mike Melanson
                }
2269 ae1dd8e1 Michael Niedermayer
2270 2da2ba03 Matthieu Castet
                if (qi > 63) {
2271 7146d2c2 Alex Beregszaszi
                    av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2272 bb270c08 Diego Biurrun
                    return -1;
2273
                }
2274 ae1dd8e1 Michael Niedermayer
                s->qr_count[inter][plane]= qri;
2275 39922395 Mike Melanson
            }
2276
        }
2277
    }
2278
2279 2da2ba03 Matthieu Castet
    /* Huffman tables */
2280 39922395 Mike Melanson
    for (s->hti = 0; s->hti < 80; s->hti++) {
2281
        s->entries = 0;
2282
        s->huff_code_size = 1;
2283 5fc32c27 Alex Beregszaszi
        if (!get_bits1(gb)) {
2284 39922395 Mike Melanson
            s->hbits = 0;
2285 00bbe276 Alex Converse
            if(read_huffman_tree(avctx, gb))
2286
                return -1;
2287 39922395 Mike Melanson
            s->hbits = 1;
2288 00bbe276 Alex Converse
            if(read_huffman_tree(avctx, gb))
2289
                return -1;
2290 39922395 Mike Melanson
        }
2291
    }
2292 115329f1 Diego Biurrun
2293 f44ee2c3 Alex Beregszaszi
    s->theora_tables = 1;
2294 115329f1 Diego Biurrun
2295 f44ee2c3 Alex Beregszaszi
    return 0;
2296
}
2297
2298 5ef251e5 Daniel Verkamp
static av_cold int theora_decode_init(AVCodecContext *avctx)
2299 f44ee2c3 Alex Beregszaszi
{
2300
    Vp3DecodeContext *s = avctx->priv_data;
2301
    GetBitContext gb;
2302
    int ptype;
2303 da91ed59 Aurelien Jacobs
    uint8_t *header_start[3];
2304
    int header_len[3];
2305
    int i;
2306 115329f1 Diego Biurrun
2307 f44ee2c3 Alex Beregszaszi
    s->theora = 1;
2308
2309
    if (!avctx->extradata_size)
2310 7146d2c2 Alex Beregszaszi
    {
2311
        av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
2312 bb270c08 Diego Biurrun
        return -1;
2313 7146d2c2 Alex Beregszaszi
    }
2314 f44ee2c3 Alex Beregszaszi
2315 da91ed59 Aurelien Jacobs
    if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2316
                              42, header_start, header_len) < 0) {
2317
        av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2318
        return -1;
2319
    }
2320 ee89b2b9 Michael Niedermayer
2321 da91ed59 Aurelien Jacobs
  for(i=0;i<3;i++) {
2322 fa6f2751 Google Chrome
    init_get_bits(&gb, header_start[i], header_len[i] * 8);
2323 f44ee2c3 Alex Beregszaszi
2324
    ptype = get_bits(&gb, 8);
2325 115329f1 Diego Biurrun
2326 7146d2c2 Alex Beregszaszi
     if (!(ptype & 0x80))
2327
     {
2328
        av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
2329 e278056f Michael Niedermayer
//        return -1;
2330 115329f1 Diego Biurrun
     }
2331 7146d2c2 Alex Beregszaszi
2332 3700dab4 Diego Biurrun
    // FIXME: Check for this as well.
2333 0a8dedc9 David Conrad
    skip_bits_long(&gb, 6*8); /* "theora" */
2334 115329f1 Diego Biurrun
2335 f44ee2c3 Alex Beregszaszi
    switch(ptype)
2336
    {
2337
        case 0x80:
2338 e278056f Michael Niedermayer
            theora_decode_header(avctx, &gb);
2339 bb270c08 Diego Biurrun
                break;
2340
        case 0x81:
2341 2da2ba03 Matthieu Castet
// FIXME: is this needed? it breaks sometimes
2342 bb270c08 Diego Biurrun
//            theora_decode_comments(avctx, gb);
2343
            break;
2344
        case 0x82:
2345 00bbe276 Alex Converse
            if (theora_decode_tables(avctx, &gb))
2346
                return -1;
2347 bb270c08 Diego Biurrun
            break;
2348
        default:
2349
            av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2350
            break;
2351 f44ee2c3 Alex Beregszaszi
    }
2352 12ce1f3f David Conrad
    if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2353
        av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
2354 116d866c Matthieu Castet
    if (s->theora < 0x030200)
2355
        break;
2356 ee89b2b9 Michael Niedermayer
  }
2357 f44ee2c3 Alex Beregszaszi
2358 c79c960a Reimar Döffinger
    return vp3_decode_init(avctx);
2359 f44ee2c3 Alex Beregszaszi
}
2360
2361 6f6a3e2a Diego Biurrun
AVCodec theora_decoder = {
2362
    "theora",
2363 d86053a4 Mike Melanson
    CODEC_TYPE_VIDEO,
2364 6f6a3e2a Diego Biurrun
    CODEC_ID_THEORA,
2365 d86053a4 Mike Melanson
    sizeof(Vp3DecodeContext),
2366 6f6a3e2a Diego Biurrun
    theora_decode_init,
2367 d86053a4 Mike Melanson
    NULL,
2368
    vp3_decode_end,
2369
    vp3_decode_frame,
2370 7f57905d Baptiste Coudurier
    CODEC_CAP_DR1,
2371 d5202e4f Stefano Sabatini
    NULL,
2372 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("Theora"),
2373 d86053a4 Mike Melanson
};
2374 6f6a3e2a Diego Biurrun
#endif
2375 f44ee2c3 Alex Beregszaszi
2376 6f6a3e2a Diego Biurrun
AVCodec vp3_decoder = {
2377
    "vp3",
2378 f44ee2c3 Alex Beregszaszi
    CODEC_TYPE_VIDEO,
2379 6f6a3e2a Diego Biurrun
    CODEC_ID_VP3,
2380 f44ee2c3 Alex Beregszaszi
    sizeof(Vp3DecodeContext),
2381 6f6a3e2a Diego Biurrun
    vp3_decode_init,
2382 f44ee2c3 Alex Beregszaszi
    NULL,
2383
    vp3_decode_end,
2384
    vp3_decode_frame,
2385 7f57905d Baptiste Coudurier
    CODEC_CAP_DR1,
2386 d5202e4f Stefano Sabatini
    NULL,
2387 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
2388 f44ee2c3 Alex Beregszaszi
};