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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 <unistd.h>
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#include "avcodec.h"
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#include "dsputil.h"
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#include "bitstream.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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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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} 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 qis[3];
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    int nqis;
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    int quality_index;
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    int last_quality_index;
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    int superblock_count;
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    int 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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    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[2][4][64]);        //<qmat[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 *hilbert = NULL;
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    int mapping_index = 0;
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    int current_macroblock;
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    int c_fragment;
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    signed char travel_width[16] = {
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         1,  1,  0, -1,
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         0,  0,  1,  0,
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         1,  0,  1,  0,
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         0, -1,  0,  1
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    };
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    signed char travel_height[16] = {
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         0,  0,  1,  0,
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         1,  1,  0, -1,
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         0,  1,  0, -1,
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        -1,  0, -1,  0
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    };
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    signed char travel_width_mb[4] = {
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         1,  0,  1,  0
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    };
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    signed char travel_height_mb[4] = {
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         0,  1,  0, -1
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    };
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    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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    hilbert = hilbert_walk_mb;
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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.
460
 */
461
static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
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{
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    int i;
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    /* zero out all of the fragment information */
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    s->coded_fragment_list_index = 0;
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    for (i = 0; i < s->fragment_count; i++) {
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        s->coeff_counts[i] = 0;
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        s->all_fragments[i].motion_x = 127;
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        s->all_fragments[i].motion_y = 127;
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        s->all_fragments[i].next_coeff= NULL;
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        s->coeffs[i].index=
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        s->coeffs[i].coeff=0;
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        s->coeffs[i].next= NULL;
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    }
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}
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/*
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 * This function sets up the dequantization tables used for a particular
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 * frame.
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 */
482
static void init_dequantizer(Vp3DecodeContext *s)
483
{
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    int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
485 f44ee2c3 Alex Beregszaszi
    int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
486 36c32bdd Diego Biurrun
    int i, plane, inter, qri, bmi, bmj, qistart;
487 d86053a4 Mike Melanson
488 ae1dd8e1 Michael Niedermayer
    for(inter=0; inter<2; inter++){
489
        for(plane=0; plane<3; plane++){
490
            int sum=0;
491
            for(qri=0; qri<s->qr_count[inter][plane]; qri++){
492
                sum+= s->qr_size[inter][plane][qri];
493
                if(s->quality_index <= sum)
494
                    break;
495
            }
496
            qistart= sum - s->qr_size[inter][plane][qri];
497
            bmi= s->qr_base[inter][plane][qri  ];
498
            bmj= s->qr_base[inter][plane][qri+1];
499
            for(i=0; i<64; i++){
500
                int coeff= (  2*(sum    -s->quality_index)*s->base_matrix[bmi][i]
501
                            - 2*(qistart-s->quality_index)*s->base_matrix[bmj][i]
502
                            + s->qr_size[inter][plane][qri])
503
                           / (2*s->qr_size[inter][plane][qri]);
504
505 a14ab4e4 Michael Niedermayer
                int qmin= 8<<(inter + !i);
506 ae1dd8e1 Michael Niedermayer
                int qscale= i ? ac_scale_factor : dc_scale_factor;
507
508 7f065b36 David Conrad
                s->qmat[inter][plane][s->dsp.idct_permutation[i]]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
509 ae1dd8e1 Michael Niedermayer
            }
510
        }
511 d86053a4 Mike Melanson
    }
512 115329f1 Diego Biurrun
513 187c9be7 Michael Niedermayer
    memset(s->qscale_table, (FFMAX(s->qmat[0][0][1], s->qmat[0][1][1])+8)/16, 512); //FIXME finetune
514 d86053a4 Mike Melanson
}
515
516
/*
517 f44b08a5 Mike Melanson
 * This function initializes the loop filter boundary limits if the frame's
518
 * quality index is different from the previous frame's.
519
 */
520
static void init_loop_filter(Vp3DecodeContext *s)
521
{
522
    int *bounding_values= s->bounding_values_array+127;
523
    int filter_limit;
524
    int x;
525
526
    filter_limit = s->filter_limit_values[s->quality_index];
527
528
    /* set up the bounding values */
529
    memset(s->bounding_values_array, 0, 256 * sizeof(int));
530
    for (x = 0; x < filter_limit; x++) {
531
        bounding_values[-x - filter_limit] = -filter_limit + x;
532
        bounding_values[-x] = -x;
533
        bounding_values[x] = x;
534
        bounding_values[x + filter_limit] = filter_limit - x;
535
    }
536 357f45d9 David Conrad
    bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
537 f44b08a5 Mike Melanson
}
538
539
/*
540 115329f1 Diego Biurrun
 * This function unpacks all of the superblock/macroblock/fragment coding
541 d86053a4 Mike Melanson
 * information from the bitstream.
542
 */
543 892fc83e Mike Melanson
static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
544 d86053a4 Mike Melanson
{
545
    int bit = 0;
546
    int current_superblock = 0;
547
    int current_run = 0;
548
    int decode_fully_flags = 0;
549
    int decode_partial_blocks = 0;
550 22493ab9 Mike Melanson
    int first_c_fragment_seen;
551 d86053a4 Mike Melanson
552
    int i, j;
553
    int current_fragment;
554
555
    if (s->keyframe) {
556
        memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
557
558
    } else {
559
560
        /* unpack the list of partially-coded superblocks */
561 5fc32c27 Alex Beregszaszi
        bit = get_bits1(gb);
562 115329f1 Diego Biurrun
        /* toggle the bit because as soon as the first run length is
563 d86053a4 Mike Melanson
         * fetched the bit will be toggled again */
564
        bit ^= 1;
565
        while (current_superblock < s->superblock_count) {
566 b5da3635 Michael Niedermayer
            if (current_run-- == 0) {
567 d86053a4 Mike Melanson
                bit ^= 1;
568 115329f1 Diego Biurrun
                current_run = get_vlc2(gb,
569 b5da3635 Michael Niedermayer
                    s->superblock_run_length_vlc.table, 6, 2);
570
                if (current_run == 33)
571 d8278bab Mike Melanson
                    current_run += get_bits(gb, 12);
572 d86053a4 Mike Melanson
573
                /* if any of the superblocks are not partially coded, flag
574
                 * a boolean to decode the list of fully-coded superblocks */
575 642d7e84 Mike Melanson
                if (bit == 0) {
576 d86053a4 Mike Melanson
                    decode_fully_flags = 1;
577 642d7e84 Mike Melanson
                } else {
578 d86053a4 Mike Melanson
579 642d7e84 Mike Melanson
                    /* make a note of the fact that there are partially coded
580
                     * superblocks */
581
                    decode_partial_blocks = 1;
582
                }
583 d86053a4 Mike Melanson
            }
584 b5da3635 Michael Niedermayer
            s->superblock_coding[current_superblock++] = bit;
585 d86053a4 Mike Melanson
        }
586
587
        /* unpack the list of fully coded superblocks if any of the blocks were
588
         * not marked as partially coded in the previous step */
589
        if (decode_fully_flags) {
590
591
            current_superblock = 0;
592
            current_run = 0;
593 5fc32c27 Alex Beregszaszi
            bit = get_bits1(gb);
594 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
595 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
596
            bit ^= 1;
597
            while (current_superblock < s->superblock_count) {
598
599
                /* skip any superblocks already marked as partially coded */
600
                if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
601
602 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
603 d86053a4 Mike Melanson
                        bit ^= 1;
604 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
605 b5da3635 Michael Niedermayer
                            s->superblock_run_length_vlc.table, 6, 2);
606
                        if (current_run == 33)
607 d8278bab Mike Melanson
                            current_run += get_bits(gb, 12);
608 d86053a4 Mike Melanson
                    }
609 b5da3635 Michael Niedermayer
                    s->superblock_coding[current_superblock] = 2*bit;
610 d86053a4 Mike Melanson
                }
611
                current_superblock++;
612
            }
613
        }
614
615
        /* if there were partial blocks, initialize bitstream for
616
         * unpacking fragment codings */
617
        if (decode_partial_blocks) {
618
619
            current_run = 0;
620 5fc32c27 Alex Beregszaszi
            bit = get_bits1(gb);
621 115329f1 Diego Biurrun
            /* toggle the bit because as soon as the first run length is
622 d86053a4 Mike Melanson
             * fetched the bit will be toggled again */
623
            bit ^= 1;
624
        }
625
    }
626
627
    /* figure out which fragments are coded; iterate through each
628
     * superblock (all planes) */
629
    s->coded_fragment_list_index = 0;
630 7beddb12 Michael Niedermayer
    s->next_coeff= s->coeffs + s->fragment_count;
631 04331882 Mike Melanson
    s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
632
    s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
633 22493ab9 Mike Melanson
    first_c_fragment_seen = 0;
634 96a7e73b Mike Melanson
    memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
635 d86053a4 Mike Melanson
    for (i = 0; i < s->superblock_count; i++) {
636
637
        /* iterate through all 16 fragments in a superblock */
638
        for (j = 0; j < 16; j++) {
639
640
            /* if the fragment is in bounds, check its coding status */
641
            current_fragment = s->superblock_fragments[i * 16 + j];
642 892fc83e Mike Melanson
            if (current_fragment >= s->fragment_count) {
643 9b879566 Michel Bardiaux
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
644 892fc83e Mike Melanson
                    current_fragment, s->fragment_count);
645
                return 1;
646
            }
647 d86053a4 Mike Melanson
            if (current_fragment != -1) {
648
                if (s->superblock_coding[i] == SB_NOT_CODED) {
649
650
                    /* copy all the fragments from the prior frame */
651 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
652 d86053a4 Mike Melanson
                        MODE_COPY;
653
654
                } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
655
656
                    /* fragment may or may not be coded; this is the case
657
                     * that cares about the fragment coding runs */
658 b5da3635 Michael Niedermayer
                    if (current_run-- == 0) {
659 d86053a4 Mike Melanson
                        bit ^= 1;
660 115329f1 Diego Biurrun
                        current_run = get_vlc2(gb,
661 b5da3635 Michael Niedermayer
                            s->fragment_run_length_vlc.table, 5, 2);
662 d86053a4 Mike Melanson
                    }
663
664
                    if (bit) {
665 115329f1 Diego Biurrun
                        /* default mode; actual mode will be decoded in
666 22493ab9 Mike Melanson
                         * the next phase */
667 115329f1 Diego Biurrun
                        s->all_fragments[current_fragment].coding_method =
668 d86053a4 Mike Melanson
                            MODE_INTER_NO_MV;
669 7beddb12 Michael Niedermayer
                        s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
670 115329f1 Diego Biurrun
                        s->coded_fragment_list[s->coded_fragment_list_index] =
671 d86053a4 Mike Melanson
                            current_fragment;
672 1abbf64e Michael Niedermayer
                        if ((current_fragment >= s->fragment_start[1]) &&
673 22493ab9 Mike Melanson
                            (s->last_coded_y_fragment == -1) &&
674
                            (!first_c_fragment_seen)) {
675 04331882 Mike Melanson
                            s->first_coded_c_fragment = s->coded_fragment_list_index;
676
                            s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
677 22493ab9 Mike Melanson
                            first_c_fragment_seen = 1;
678 04331882 Mike Melanson
                        }
679
                        s->coded_fragment_list_index++;
680 96a7e73b Mike Melanson
                        s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
681 d86053a4 Mike Melanson
                    } else {
682
                        /* not coded; copy this fragment from the prior frame */
683
                        s->all_fragments[current_fragment].coding_method =
684
                            MODE_COPY;
685
                    }
686
687
                } else {
688
689
                    /* fragments are fully coded in this superblock; actual
690
                     * coding will be determined in next step */
691 115329f1 Diego Biurrun
                    s->all_fragments[current_fragment].coding_method =
692 d86053a4 Mike Melanson
                        MODE_INTER_NO_MV;
693 7beddb12 Michael Niedermayer
                    s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
694 115329f1 Diego Biurrun
                    s->coded_fragment_list[s->coded_fragment_list_index] =
695 d86053a4 Mike Melanson
                        current_fragment;
696 1abbf64e Michael Niedermayer
                    if ((current_fragment >= s->fragment_start[1]) &&
697 22493ab9 Mike Melanson
                        (s->last_coded_y_fragment == -1) &&
698
                        (!first_c_fragment_seen)) {
699 04331882 Mike Melanson
                        s->first_coded_c_fragment = s->coded_fragment_list_index;
700
                        s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
701 22493ab9 Mike Melanson
                        first_c_fragment_seen = 1;
702 04331882 Mike Melanson
                    }
703
                    s->coded_fragment_list_index++;
704 96a7e73b Mike Melanson
                    s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
705 d86053a4 Mike Melanson
                }
706
            }
707
        }
708
    }
709 04331882 Mike Melanson
710 22493ab9 Mike Melanson
    if (!first_c_fragment_seen)
711
        /* only Y fragments coded in this frame */
712 04331882 Mike Melanson
        s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
713 115329f1 Diego Biurrun
    else
714 642d7e84 Mike Melanson
        /* end the list of coded C fragments */
715 04331882 Mike Melanson
        s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
716 22493ab9 Mike Melanson
717 892fc83e Mike Melanson
    return 0;
718 d86053a4 Mike Melanson
}
719
720
/*
721
 * This function unpacks all the coding mode data for individual macroblocks
722
 * from the bitstream.
723
 */
724 892fc83e Mike Melanson
static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
725 d86053a4 Mike Melanson
{
726
    int i, j, k;
727
    int scheme;
728
    int current_macroblock;
729
    int current_fragment;
730
    int coding_mode;
731 e8e47435 Stefan Gehrer
    int custom_mode_alphabet[CODING_MODE_COUNT];
732 d86053a4 Mike Melanson
733
    if (s->keyframe) {
734
        for (i = 0; i < s->fragment_count; i++)
735
            s->all_fragments[i].coding_method = MODE_INTRA;
736
737
    } else {
738
739
        /* fetch the mode coding scheme for this frame */
740
        scheme = get_bits(gb, 3);
741
742
        /* is it a custom coding scheme? */
743
        if (scheme == 0) {
744
            for (i = 0; i < 8; i++)
745 2c823b3c Alex Converse
                custom_mode_alphabet[i] = MODE_INTER_NO_MV;
746
            for (i = 0; i < 8; i++)
747 e8e47435 Stefan Gehrer
                custom_mode_alphabet[get_bits(gb, 3)] = i;
748 d86053a4 Mike Melanson
        }
749
750
        /* iterate through all of the macroblocks that contain 1 or more
751
         * coded fragments */
752
        for (i = 0; i < s->u_superblock_start; i++) {
753
754
            for (j = 0; j < 4; j++) {
755
                current_macroblock = s->superblock_macroblocks[i * 4 + j];
756
                if ((current_macroblock == -1) ||
757 96a7e73b Mike Melanson
                    (s->macroblock_coding[current_macroblock] == MODE_COPY))
758 d86053a4 Mike Melanson
                    continue;
759 892fc83e Mike Melanson
                if (current_macroblock >= s->macroblock_count) {
760 9b879566 Michel Bardiaux
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
761 892fc83e Mike Melanson
                        current_macroblock, s->macroblock_count);
762
                    return 1;
763
                }
764 d86053a4 Mike Melanson
765
                /* mode 7 means get 3 bits for each coding mode */
766
                if (scheme == 7)
767
                    coding_mode = get_bits(gb, 3);
768 e8e47435 Stefan Gehrer
                else if(scheme == 0)
769
                    coding_mode = custom_mode_alphabet
770
                        [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
771 d86053a4 Mike Melanson
                else
772 e8e47435 Stefan Gehrer
                    coding_mode = ModeAlphabet[scheme-1]
773 0ad72bdd Mike Melanson
                        [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
774 d86053a4 Mike Melanson
775 96a7e73b Mike Melanson
                s->macroblock_coding[current_macroblock] = coding_mode;
776 d86053a4 Mike Melanson
                for (k = 0; k < 6; k++) {
777 115329f1 Diego Biurrun
                    current_fragment =
778 d86053a4 Mike Melanson
                        s->macroblock_fragments[current_macroblock * 6 + k];
779 892fc83e Mike Melanson
                    if (current_fragment == -1)
780
                        continue;
781
                    if (current_fragment >= s->fragment_count) {
782 9b879566 Michel Bardiaux
                        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
783 892fc83e Mike Melanson
                            current_fragment, s->fragment_count);
784
                        return 1;
785
                    }
786 115329f1 Diego Biurrun
                    if (s->all_fragments[current_fragment].coding_method !=
787 d86053a4 Mike Melanson
                        MODE_COPY)
788
                        s->all_fragments[current_fragment].coding_method =
789
                            coding_mode;
790
                }
791
            }
792
        }
793
    }
794 892fc83e Mike Melanson
795
    return 0;
796 44ae98dd Mike Melanson
}
797
798
/*
799 d86053a4 Mike Melanson
 * This function unpacks all the motion vectors for the individual
800
 * macroblocks from the bitstream.
801
 */
802 892fc83e Mike Melanson
static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
803 d86053a4 Mike Melanson
{
804 feaf1a73 Aurelien Jacobs
    int i, j, k, l;
805 d86053a4 Mike Melanson
    int coding_mode;
806
    int motion_x[6];
807
    int motion_y[6];
808
    int last_motion_x = 0;
809
    int last_motion_y = 0;
810
    int prior_last_motion_x = 0;
811
    int prior_last_motion_y = 0;
812
    int current_macroblock;
813
    int current_fragment;
814
815 6599e2a7 David Conrad
    if (s->keyframe)
816 6298f49f David Conrad
        return 0;
817 10f38380 David Conrad
818 1ae4518d David Conrad
    memset(motion_x, 0, 6 * sizeof(int));
819
    memset(motion_y, 0, 6 * sizeof(int));
820 d86053a4 Mike Melanson
821 1ae4518d David Conrad
    /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
822
    coding_mode = get_bits1(gb);
823 d86053a4 Mike Melanson
824 1ae4518d David Conrad
    /* iterate through all of the macroblocks that contain 1 or more
825
     * coded fragments */
826
    for (i = 0; i < s->u_superblock_start; i++) {
827 d86053a4 Mike Melanson
828 1ae4518d David Conrad
        for (j = 0; j < 4; j++) {
829
            current_macroblock = s->superblock_macroblocks[i * 4 + j];
830
            if ((current_macroblock == -1) ||
831
                (s->macroblock_coding[current_macroblock] == MODE_COPY))
832
                continue;
833
            if (current_macroblock >= s->macroblock_count) {
834
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
835
                    current_macroblock, s->macroblock_count);
836
                return 1;
837
            }
838 d86053a4 Mike Melanson
839 1ae4518d David Conrad
            current_fragment = s->macroblock_fragments[current_macroblock * 6];
840
            if (current_fragment >= s->fragment_count) {
841
                av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
842
                    current_fragment, s->fragment_count);
843
                return 1;
844
            }
845
            switch (s->macroblock_coding[current_macroblock]) {
846
847
            case MODE_INTER_PLUS_MV:
848
            case MODE_GOLDEN_MV:
849
                /* all 6 fragments use the same motion vector */
850
                if (coding_mode == 0) {
851
                    motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
852
                    motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
853
                } else {
854
                    motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
855
                    motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
856 892fc83e Mike Melanson
                }
857 7f9926a4 Mike Melanson
858 1ae4518d David Conrad
                for (k = 1; k < 6; k++) {
859
                    motion_x[k] = motion_x[0];
860
                    motion_y[k] = motion_y[0];
861
                }
862 d86053a4 Mike Melanson
863 1ae4518d David Conrad
                /* vector maintenance, only on MODE_INTER_PLUS_MV */
864
                if (s->macroblock_coding[current_macroblock] ==
865
                    MODE_INTER_PLUS_MV) {
866 e32e2d56 Aurelien Jacobs
                    prior_last_motion_x = last_motion_x;
867
                    prior_last_motion_y = last_motion_y;
868 1ae4518d David Conrad
                    last_motion_x = motion_x[0];
869
                    last_motion_y = motion_y[0];
870
                }
871
                break;
872
873
            case MODE_INTER_FOURMV:
874
                /* vector maintenance */
875
                prior_last_motion_x = last_motion_x;
876
                prior_last_motion_y = last_motion_y;
877
878
                /* fetch 4 vectors from the bitstream, one for each
879
                 * Y fragment, then average for the C fragment vectors */
880
                motion_x[4] = motion_y[4] = 0;
881
                for (k = 0; k < 4; k++) {
882
                    for (l = 0; l < s->coded_fragment_list_index; l++)
883
                        if (s->coded_fragment_list[l] == s->macroblock_fragments[6*current_macroblock + k])
884
                            break;
885
                    if (l < s->coded_fragment_list_index) {
886
                        if (coding_mode == 0) {
887
                            motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
888
                            motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
889 feaf1a73 Aurelien Jacobs
                        } else {
890 1ae4518d David Conrad
                            motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
891
                            motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
892 feaf1a73 Aurelien Jacobs
                        }
893 1ae4518d David Conrad
                        last_motion_x = motion_x[k];
894
                        last_motion_y = motion_y[k];
895
                    } else {
896
                        motion_x[k] = 0;
897
                        motion_y[k] = 0;
898 d86053a4 Mike Melanson
                    }
899 1ae4518d David Conrad
                    motion_x[4] += motion_x[k];
900
                    motion_y[4] += motion_y[k];
901
                }
902 d86053a4 Mike Melanson
903 1ae4518d David Conrad
                motion_x[5]=
904
                motion_x[4]= RSHIFT(motion_x[4], 2);
905
                motion_y[5]=
906
                motion_y[4]= RSHIFT(motion_y[4], 2);
907
                break;
908
909
            case MODE_INTER_LAST_MV:
910
                /* all 6 fragments use the last motion vector */
911
                motion_x[0] = last_motion_x;
912
                motion_y[0] = last_motion_y;
913
                for (k = 1; k < 6; k++) {
914
                    motion_x[k] = motion_x[0];
915
                    motion_y[k] = motion_y[0];
916
                }
917 d86053a4 Mike Melanson
918 1ae4518d David Conrad
                /* no vector maintenance (last vector remains the
919
                 * last vector) */
920
                break;
921
922
            case MODE_INTER_PRIOR_LAST:
923
                /* all 6 fragments use the motion vector prior to the
924
                 * last motion vector */
925
                motion_x[0] = prior_last_motion_x;
926
                motion_y[0] = prior_last_motion_y;
927
                for (k = 1; k < 6; k++) {
928
                    motion_x[k] = motion_x[0];
929
                    motion_y[k] = motion_y[0];
930
                }
931 d86053a4 Mike Melanson
932 1ae4518d David Conrad
                /* vector maintenance */
933
                prior_last_motion_x = last_motion_x;
934
                prior_last_motion_y = last_motion_y;
935
                last_motion_x = motion_x[0];
936
                last_motion_y = motion_y[0];
937
                break;
938 44ae98dd Mike Melanson
939 1ae4518d David Conrad
            default:
940
                /* covers intra, inter without MV, golden without MV */
941
                memset(motion_x, 0, 6 * sizeof(int));
942
                memset(motion_y, 0, 6 * sizeof(int));
943 44ae98dd Mike Melanson
944 1ae4518d David Conrad
                /* no vector maintenance */
945
                break;
946
            }
947 d86053a4 Mike Melanson
948 1ae4518d David Conrad
            /* assign the motion vectors to the correct fragments */
949
            for (k = 0; k < 6; k++) {
950
                current_fragment =
951
                    s->macroblock_fragments[current_macroblock * 6 + k];
952
                if (current_fragment == -1)
953
                    continue;
954
                if (current_fragment >= s->fragment_count) {
955
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
956
                        current_fragment, s->fragment_count);
957
                    return 1;
958 d86053a4 Mike Melanson
                }
959 1ae4518d David Conrad
                s->all_fragments[current_fragment].motion_x = motion_x[k];
960
                s->all_fragments[current_fragment].motion_y = motion_y[k];
961 d86053a4 Mike Melanson
            }
962
        }
963 1ae4518d David Conrad
    }
964 892fc83e Mike Melanson
965
    return 0;
966 d86053a4 Mike Melanson
}
967
968 115329f1 Diego Biurrun
/*
969 d86053a4 Mike Melanson
 * This function is called by unpack_dct_coeffs() to extract the VLCs from
970
 * the bitstream. The VLCs encode tokens which are used to unpack DCT
971
 * data. This function unpacks all the VLCs for either the Y plane or both
972
 * C planes, and is called for DC coefficients or different AC coefficient
973
 * levels (since different coefficient types require different VLC tables.
974
 *
975
 * This function returns a residual eob run. E.g, if a particular token gave
976
 * instructions to EOB the next 5 fragments and there were only 2 fragments
977
 * left in the current fragment range, 3 would be returned so that it could
978
 * be passed into the next call to this same function.
979
 */
980
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
981
                        VLC *table, int coeff_index,
982
                        int first_fragment, int last_fragment,
983
                        int eob_run)
984
{
985
    int i;
986
    int token;
987 d3076955 Mike Melanson
    int zero_run = 0;
988
    DCTELEM coeff = 0;
989 d86053a4 Mike Melanson
    Vp3Fragment *fragment;
990 36af0c95 Michael Niedermayer
    uint8_t *perm= s->scantable.permutated;
991 d3076955 Mike Melanson
    int bits_to_get;
992 d86053a4 Mike Melanson
993 22493ab9 Mike Melanson
    if ((first_fragment >= s->fragment_count) ||
994 74c0ac12 Mike Melanson
        (last_fragment >= s->fragment_count)) {
995
996 9b879566 Michel Bardiaux
        av_log(s->avctx, AV_LOG_ERROR, "  vp3:unpack_vlcs(): bad fragment number (%d -> %d ?)\n",
997 74c0ac12 Mike Melanson
            first_fragment, last_fragment);
998 22493ab9 Mike Melanson
        return 0;
999 74c0ac12 Mike Melanson
    }
1000
1001 04331882 Mike Melanson
    for (i = first_fragment; i <= last_fragment; i++) {
1002 36e16253 Reimar Döffinger
        int fragment_num = s->coded_fragment_list[i];
1003 d86053a4 Mike Melanson
1004 36e16253 Reimar Döffinger
        if (s->coeff_counts[fragment_num] > coeff_index)
1005 d86053a4 Mike Melanson
            continue;
1006 36e16253 Reimar Döffinger
        fragment = &s->all_fragments[fragment_num];
1007 d86053a4 Mike Melanson
1008
        if (!eob_run) {
1009
            /* decode a VLC into a token */
1010
            token = get_vlc2(gb, table->table, 5, 3);
1011
            /* use the token to get a zero run, a coefficient, and an eob run */
1012 d3076955 Mike Melanson
            if (token <= 6) {
1013
                eob_run = eob_run_base[token];
1014
                if (eob_run_get_bits[token])
1015
                    eob_run += get_bits(gb, eob_run_get_bits[token]);
1016
                coeff = zero_run = 0;
1017
            } else {
1018
                bits_to_get = coeff_get_bits[token];
1019
                if (!bits_to_get)
1020
                    coeff = coeff_tables[token][0];
1021
                else
1022
                    coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
1023
1024
                zero_run = zero_run_base[token];
1025
                if (zero_run_get_bits[token])
1026
                    zero_run += get_bits(gb, zero_run_get_bits[token]);
1027
            }
1028 d86053a4 Mike Melanson
        }
1029
1030
        if (!eob_run) {
1031 36e16253 Reimar Döffinger
            s->coeff_counts[fragment_num] += zero_run;
1032
            if (s->coeff_counts[fragment_num] < 64){
1033 7beddb12 Michael Niedermayer
                fragment->next_coeff->coeff= coeff;
1034 36e16253 Reimar Döffinger
                fragment->next_coeff->index= perm[s->coeff_counts[fragment_num]++]; //FIXME perm here already?
1035 7beddb12 Michael Niedermayer
                fragment->next_coeff->next= s->next_coeff;
1036
                s->next_coeff->next=NULL;
1037
                fragment->next_coeff= s->next_coeff++;
1038
            }
1039 d86053a4 Mike Melanson
        } else {
1040 36e16253 Reimar Döffinger
            s->coeff_counts[fragment_num] |= 128;
1041 d86053a4 Mike Melanson
            eob_run--;
1042
        }
1043
    }
1044
1045
    return eob_run;
1046
}
1047
1048
/*
1049
 * This function unpacks all of the DCT coefficient data from the
1050
 * bitstream.
1051
 */
1052 892fc83e Mike Melanson
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
1053 d86053a4 Mike Melanson
{
1054
    int i;
1055
    int dc_y_table;
1056
    int dc_c_table;
1057
    int ac_y_table;
1058
    int ac_c_table;
1059
    int residual_eob_run = 0;
1060
1061 f4433de9 Diego Biurrun
    /* fetch the DC table indexes */
1062 d86053a4 Mike Melanson
    dc_y_table = get_bits(gb, 4);
1063
    dc_c_table = get_bits(gb, 4);
1064
1065
    /* unpack the Y plane DC coefficients */
1066 115329f1 Diego Biurrun
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
1067 04331882 Mike Melanson
        s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1068 d86053a4 Mike Melanson
1069
    /* unpack the C plane DC coefficients */
1070
    residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
1071 04331882 Mike Melanson
        s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1072 d86053a4 Mike Melanson
1073 f4433de9 Diego Biurrun
    /* fetch the AC table indexes */
1074 d86053a4 Mike Melanson
    ac_y_table = get_bits(gb, 4);
1075
    ac_c_table = get_bits(gb, 4);
1076
1077 a466e345 Mike Melanson
    /* unpack the group 1 AC coefficients (coeffs 1-5) */
1078 d86053a4 Mike Melanson
    for (i = 1; i <= 5; i++) {
1079 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_y_table], i,
1080 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1081 d86053a4 Mike Melanson
1082 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_c_table], i,
1083 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1084 d86053a4 Mike Melanson
    }
1085
1086 a466e345 Mike Melanson
    /* unpack the group 2 AC coefficients (coeffs 6-14) */
1087 d86053a4 Mike Melanson
    for (i = 6; i <= 14; i++) {
1088 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_y_table], i,
1089 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1090 d86053a4 Mike Melanson
1091 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_c_table], i,
1092 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1093 d86053a4 Mike Melanson
    }
1094
1095 a466e345 Mike Melanson
    /* unpack the group 3 AC coefficients (coeffs 15-27) */
1096 d86053a4 Mike Melanson
    for (i = 15; i <= 27; i++) {
1097 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_y_table], i,
1098 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1099 d86053a4 Mike Melanson
1100 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_c_table], i,
1101 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1102 d86053a4 Mike Melanson
    }
1103
1104 a466e345 Mike Melanson
    /* unpack the group 4 AC coefficients (coeffs 28-63) */
1105 d86053a4 Mike Melanson
    for (i = 28; i <= 63; i++) {
1106 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_y_table], i,
1107 04331882 Mike Melanson
            s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
1108 d86053a4 Mike Melanson
1109 115329f1 Diego Biurrun
        residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_c_table], i,
1110 04331882 Mike Melanson
            s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
1111 d86053a4 Mike Melanson
    }
1112 892fc83e Mike Melanson
1113
    return 0;
1114 d86053a4 Mike Melanson
}
1115
1116
/*
1117
 * This function reverses the DC prediction for each coded fragment in
1118 115329f1 Diego Biurrun
 * the frame. Much of this function is adapted directly from the original
1119 d86053a4 Mike Melanson
 * VP3 source code.
1120
 */
1121
#define COMPATIBLE_FRAME(x) \
1122
  (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
1123
#define FRAME_CODED(x) (s->all_fragments[x].coding_method != MODE_COPY)
1124 7beddb12 Michael Niedermayer
#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
1125 d86053a4 Mike Melanson
1126
static void reverse_dc_prediction(Vp3DecodeContext *s,
1127
                                  int first_fragment,
1128
                                  int fragment_width,
1129 115329f1 Diego Biurrun
                                  int fragment_height)
1130 d86053a4 Mike Melanson
{
1131
1132
#define PUL 8
1133
#define PU 4
1134
#define PUR 2
1135
#define PL 1
1136
1137
    int x, y;
1138
    int i = first_fragment;
1139
1140 59ef342b Michael Niedermayer
    int predicted_dc;
1141 d86053a4 Mike Melanson
1142
    /* DC values for the left, up-left, up, and up-right fragments */
1143
    int vl, vul, vu, vur;
1144
1145 f4433de9 Diego Biurrun
    /* indexes for the left, up-left, up, and up-right fragments */
1146 d86053a4 Mike Melanson
    int l, ul, u, ur;
1147
1148 115329f1 Diego Biurrun
    /*
1149 d86053a4 Mike Melanson
     * The 6 fields mean:
1150
     *   0: up-left multiplier
1151
     *   1: up multiplier
1152
     *   2: up-right multiplier
1153
     *   3: left multiplier
1154
     */
1155 006ff1ca Michael Niedermayer
    int predictor_transform[16][4] = {
1156
        {  0,  0,  0,  0},
1157
        {  0,  0,  0,128},        // PL
1158
        {  0,  0,128,  0},        // PUR
1159
        {  0,  0, 53, 75},        // PUR|PL
1160
        {  0,128,  0,  0},        // PU
1161
        {  0, 64,  0, 64},        // PU|PL
1162
        {  0,128,  0,  0},        // PU|PUR
1163
        {  0,  0, 53, 75},        // PU|PUR|PL
1164
        {128,  0,  0,  0},        // PUL
1165
        {  0,  0,  0,128},        // PUL|PL
1166
        { 64,  0, 64,  0},        // PUL|PUR
1167
        {  0,  0, 53, 75},        // PUL|PUR|PL
1168
        {  0,128,  0,  0},        // PUL|PU
1169
       {-104,116,  0,116},        // PUL|PU|PL
1170
        { 24, 80, 24,  0},        // PUL|PU|PUR
1171
       {-104,116,  0,116}         // PUL|PU|PUR|PL
1172 d86053a4 Mike Melanson
    };
1173
1174
    /* This table shows which types of blocks can use other blocks for
1175
     * prediction. For example, INTRA is the only mode in this table to
1176
     * have a frame number of 0. That means INTRA blocks can only predict
1177 115329f1 Diego Biurrun
     * from other INTRA blocks. There are 2 golden frame coding types;
1178 d86053a4 Mike Melanson
     * blocks encoding in these modes can only predict from other blocks
1179
     * that were encoded with these 1 of these 2 modes. */
1180
    unsigned char compatible_frame[8] = {
1181
        1,    /* MODE_INTER_NO_MV */
1182
        0,    /* MODE_INTRA */
1183
        1,    /* MODE_INTER_PLUS_MV */
1184
        1,    /* MODE_INTER_LAST_MV */
1185
        1,    /* MODE_INTER_PRIOR_MV */
1186
        2,    /* MODE_USING_GOLDEN */
1187
        2,    /* MODE_GOLDEN_MV */
1188
        1     /* MODE_INTER_FOUR_MV */
1189
    };
1190
    int current_frame_type;
1191
1192
    /* there is a last DC predictor for each of the 3 frame types */
1193
    short last_dc[3];
1194
1195
    int transform = 0;
1196
1197
    vul = vu = vur = vl = 0;
1198
    last_dc[0] = last_dc[1] = last_dc[2] = 0;
1199
1200
    /* for each fragment row... */
1201
    for (y = 0; y < fragment_height; y++) {
1202
1203
        /* for each fragment in a row... */
1204
        for (x = 0; x < fragment_width; x++, i++) {
1205
1206
            /* reverse prediction if this block was coded */
1207
            if (s->all_fragments[i].coding_method != MODE_COPY) {
1208
1209 115329f1 Diego Biurrun
                current_frame_type =
1210 d86053a4 Mike Melanson
                    compatible_frame[s->all_fragments[i].coding_method];
1211
1212 f72f8a77 Michael Niedermayer
                transform= 0;
1213
                if(x){
1214
                    l= i-1;
1215 7beddb12 Michael Niedermayer
                    vl = DC_COEFF(l);
1216 006ff1ca Michael Niedermayer
                    if(FRAME_CODED(l) && COMPATIBLE_FRAME(l))
1217
                        transform |= PL;
1218 f72f8a77 Michael Niedermayer
                }
1219
                if(y){
1220
                    u= i-fragment_width;
1221 7beddb12 Michael Niedermayer
                    vu = DC_COEFF(u);
1222 006ff1ca Michael Niedermayer
                    if(FRAME_CODED(u) && COMPATIBLE_FRAME(u))
1223
                        transform |= PU;
1224 f72f8a77 Michael Niedermayer
                    if(x){
1225
                        ul= i-fragment_width-1;
1226
                        vul = DC_COEFF(ul);
1227 006ff1ca Michael Niedermayer
                        if(FRAME_CODED(ul) && COMPATIBLE_FRAME(ul))
1228
                            transform |= PUL;
1229 f72f8a77 Michael Niedermayer
                    }
1230
                    if(x + 1 < fragment_width){
1231
                        ur= i-fragment_width+1;
1232
                        vur = DC_COEFF(ur);
1233 006ff1ca Michael Niedermayer
                        if(FRAME_CODED(ur) && COMPATIBLE_FRAME(ur))
1234
                            transform |= PUR;
1235 f72f8a77 Michael Niedermayer
                    }
1236 d86053a4 Mike Melanson
                }
1237
1238
                if (transform == 0) {
1239
1240
                    /* if there were no fragments to predict from, use last
1241
                     * DC saved */
1242 7beddb12 Michael Niedermayer
                    predicted_dc = last_dc[current_frame_type];
1243 d86053a4 Mike Melanson
                } else {
1244
1245
                    /* apply the appropriate predictor transform */
1246
                    predicted_dc =
1247
                        (predictor_transform[transform][0] * vul) +
1248
                        (predictor_transform[transform][1] * vu) +
1249
                        (predictor_transform[transform][2] * vur) +
1250
                        (predictor_transform[transform][3] * vl);
1251
1252 684d9e36 Michael Niedermayer
                    predicted_dc /= 128;
1253 d86053a4 Mike Melanson
1254
                    /* check for outranging on the [ul u l] and
1255
                     * [ul u ur l] predictors */
1256
                    if ((transform == 13) || (transform == 15)) {
1257 c26abfa5 Diego Biurrun
                        if (FFABS(predicted_dc - vu) > 128)
1258 d86053a4 Mike Melanson
                            predicted_dc = vu;
1259 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vl) > 128)
1260 d86053a4 Mike Melanson
                            predicted_dc = vl;
1261 c26abfa5 Diego Biurrun
                        else if (FFABS(predicted_dc - vul) > 128)
1262 d86053a4 Mike Melanson
                            predicted_dc = vul;
1263
                    }
1264
                }
1265
1266 7beddb12 Michael Niedermayer
                /* at long last, apply the predictor */
1267
                if(s->coeffs[i].index){
1268
                    *s->next_coeff= s->coeffs[i];
1269
                    s->coeffs[i].index=0;
1270
                    s->coeffs[i].coeff=0;
1271
                    s->coeffs[i].next= s->next_coeff++;
1272
                }
1273
                s->coeffs[i].coeff += predicted_dc;
1274 d86053a4 Mike Melanson
                /* save the DC */
1275 7beddb12 Michael Niedermayer
                last_dc[current_frame_type] = DC_COEFF(i);
1276 36e16253 Reimar Döffinger
                if(DC_COEFF(i) && !(s->coeff_counts[i]&127)){
1277
                    s->coeff_counts[i]= 129;
1278 7beddb12 Michael Niedermayer
//                    s->all_fragments[i].next_coeff= s->next_coeff;
1279
                    s->coeffs[i].next= s->next_coeff;
1280
                    (s->next_coeff++)->next=NULL;
1281
                }
1282 d86053a4 Mike Melanson
            }
1283
        }
1284
    }
1285
}
1286
1287
/*
1288 dc4b78d9 Mike Melanson
 * Perform the final rendering for a particular slice of data.
1289
 * The slice number ranges from 0..(macroblock_height - 1).
1290
 */
1291
static void render_slice(Vp3DecodeContext *s, int slice)
1292
{
1293 1abbf64e Michael Niedermayer
    int x;
1294 dc4b78d9 Mike Melanson
    int16_t *dequantizer;
1295 68b51e58 Steve L'Homme
    DECLARE_ALIGNED_16(DCTELEM, block[64]);
1296 dc4b78d9 Mike Melanson
    int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
1297
    int motion_halfpel_index;
1298
    uint8_t *motion_source;
1299
    int plane;
1300
    int current_macroblock_entry = slice * s->macroblock_width * 6;
1301
1302
    if (slice >= s->macroblock_height)
1303
        return;
1304
1305
    for (plane = 0; plane < 3; plane++) {
1306 1abbf64e Michael Niedermayer
        uint8_t *output_plane = s->current_frame.data    [plane];
1307
        uint8_t *  last_plane = s->   last_frame.data    [plane];
1308
        uint8_t *golden_plane = s-> golden_frame.data    [plane];
1309
        int stride            = s->current_frame.linesize[plane];
1310
        int plane_width       = s->width  >> !!plane;
1311
        int plane_height      = s->height >> !!plane;
1312
        int y =        slice *  FRAGMENT_PIXELS << !plane ;
1313
        int slice_height = y + (FRAGMENT_PIXELS << !plane);
1314
        int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
1315
1316
        if (!s->flipped_image) stride = -stride;
1317 dc4b78d9 Mike Melanson
1318 115329f1 Diego Biurrun
1319 c26abfa5 Diego Biurrun
        if(FFABS(stride) > 2048)
1320 dc4b78d9 Mike Melanson
            return; //various tables are fixed size
1321
1322
        /* for each fragment row in the slice (both of them)... */
1323
        for (; y < slice_height; y += 8) {
1324
1325
            /* for each fragment in a row... */
1326
            for (x = 0; x < plane_width; x += 8, i++) {
1327
1328
                if ((i < 0) || (i >= s->fragment_count)) {
1329
                    av_log(s->avctx, AV_LOG_ERROR, "  vp3:render_slice(): bad fragment number (%d)\n", i);
1330
                    return;
1331
                }
1332
1333
                /* transform if this block was coded */
1334
                if ((s->all_fragments[i].coding_method != MODE_COPY) &&
1335
                    !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
1336
1337
                    if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
1338
                        (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
1339
                        motion_source= golden_plane;
1340 115329f1 Diego Biurrun
                    else
1341 dc4b78d9 Mike Melanson
                        motion_source= last_plane;
1342
1343
                    motion_source += s->all_fragments[i].first_pixel;
1344
                    motion_halfpel_index = 0;
1345
1346
                    /* sort out the motion vector if this fragment is coded
1347
                     * using a motion vector method */
1348
                    if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
1349
                        (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
1350
                        int src_x, src_y;
1351
                        motion_x = s->all_fragments[i].motion_x;
1352
                        motion_y = s->all_fragments[i].motion_y;
1353
                        if(plane){
1354
                            motion_x= (motion_x>>1) | (motion_x&1);
1355
                            motion_y= (motion_y>>1) | (motion_y&1);
1356
                        }
1357
1358
                        src_x= (motion_x>>1) + x;
1359
                        src_y= (motion_y>>1) + y;
1360
                        if ((motion_x == 127) || (motion_y == 127))
1361
                            av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
1362
1363
                        motion_halfpel_index = motion_x & 0x01;
1364
                        motion_source += (motion_x >> 1);
1365
1366
                        motion_halfpel_index |= (motion_y & 0x01) << 1;
1367
                        motion_source += ((motion_y >> 1) * stride);
1368
1369
                        if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
1370
                            uint8_t *temp= s->edge_emu_buffer;
1371
                            if(stride<0) temp -= 9*stride;
1372
                            else temp += 9*stride;
1373
1374
                            ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
1375
                            motion_source= temp;
1376
                        }
1377
                    }
1378 115329f1 Diego Biurrun
1379 dc4b78d9 Mike Melanson
1380
                    /* first, take care of copying a block from either the
1381
                     * previous or the golden frame */
1382
                    if (s->all_fragments[i].coding_method != MODE_INTRA) {
1383 115329f1 Diego Biurrun
                        /* Note, it is possible to implement all MC cases with
1384
                           put_no_rnd_pixels_l2 which would look more like the
1385
                           VP3 source but this would be slower as
1386 dc4b78d9 Mike Melanson
                           put_no_rnd_pixels_tab is better optimzed */
1387
                        if(motion_halfpel_index != 3){
1388
                            s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
1389
                                output_plane + s->all_fragments[i].first_pixel,
1390
                                motion_source, stride, 8);
1391
                        }else{
1392
                            int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
1393
                            s->dsp.put_no_rnd_pixels_l2[1](
1394
                                output_plane + s->all_fragments[i].first_pixel,
1395 115329f1 Diego Biurrun
                                motion_source - d,
1396
                                motion_source + stride + 1 + d,
1397 dc4b78d9 Mike Melanson
                                stride, 8);
1398
                        }
1399 187c9be7 Michael Niedermayer
                        dequantizer = s->qmat[1][plane];
1400 dc4b78d9 Mike Melanson
                    }else{
1401 187c9be7 Michael Niedermayer
                        dequantizer = s->qmat[0][plane];
1402 dc4b78d9 Mike Melanson
                    }
1403
1404
                    /* dequantize the DCT coefficients */
1405
                    if(s->avctx->idct_algo==FF_IDCT_VP3){
1406
                        Coeff *coeff= s->coeffs + i;
1407 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1408 dc4b78d9 Mike Melanson
                        while(coeff->next){
1409
                            block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
1410
                            coeff= coeff->next;
1411
                        }
1412
                    }else{
1413
                        Coeff *coeff= s->coeffs + i;
1414 5fecfb7d Loren Merritt
                        s->dsp.clear_block(block);
1415 dc4b78d9 Mike Melanson
                        while(coeff->next){
1416
                            block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
1417
                            coeff= coeff->next;
1418
                        }
1419
                    }
1420
1421
                    /* invert DCT and place (or add) in final output */
1422 115329f1 Diego Biurrun
1423 dc4b78d9 Mike Melanson
                    if (s->all_fragments[i].coding_method == MODE_INTRA) {
1424
                        if(s->avctx->idct_algo!=FF_IDCT_VP3)
1425
                            block[0] += 128<<3;
1426
                        s->dsp.idct_put(
1427
                            output_plane + s->all_fragments[i].first_pixel,
1428
                            stride,
1429
                            block);
1430
                    } else {
1431
                        s->dsp.idct_add(
1432
                            output_plane + s->all_fragments[i].first_pixel,
1433
                            stride,
1434
                            block);
1435
                    }
1436
                } else {
1437
1438
                    /* copy directly from the previous frame */
1439
                    s->dsp.put_pixels_tab[1][0](
1440
                        output_plane + s->all_fragments[i].first_pixel,
1441
                        last_plane + s->all_fragments[i].first_pixel,
1442
                        stride, 8);
1443
1444
                }
1445 72053728 Michael Niedermayer
#if 0
1446 2935001c Mike Melanson
                /* perform the left edge filter if:
1447
                 *   - the fragment is not on the left column
1448
                 *   - the fragment is coded in this frame
1449
                 *   - the fragment is not coded in this frame but the left
1450
                 *     fragment is coded in this frame (this is done instead
1451
                 *     of a right edge filter when rendering the left fragment
1452
                 *     since this fragment is not available yet) */
1453 f44b08a5 Mike Melanson
                if ((x > 0) &&
1454 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1455
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1456
                      (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
1457 f44b08a5 Mike Melanson
                    horizontal_filter(
1458 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel + 7*stride,
1459 1af5f60f Michael Niedermayer
                        -stride, s->bounding_values_array + 127);
1460 f44b08a5 Mike Melanson
                }
1461

1462 2935001c Mike Melanson
                /* perform the top edge filter if:
1463
                 *   - the fragment is not on the top row
1464
                 *   - the fragment is coded in this frame
1465
                 *   - the fragment is not coded in this frame but the above
1466
                 *     fragment is coded in this frame (this is done instead
1467
                 *     of a bottom edge filter when rendering the above
1468
                 *     fragment since this fragment is not available yet) */
1469 f44b08a5 Mike Melanson
                if ((y > 0) &&
1470 2935001c Mike Melanson
                    ((s->all_fragments[i].coding_method != MODE_COPY) ||
1471
                     ((s->all_fragments[i].coding_method == MODE_COPY) &&
1472
                      (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
1473 f44b08a5 Mike Melanson
                    vertical_filter(
1474 2935001c Mike Melanson
                        output_plane + s->all_fragments[i].first_pixel - stride,
1475 1af5f60f Michael Niedermayer
                        -stride, s->bounding_values_array + 127);
1476 f44b08a5 Mike Melanson
                }
1477 72053728 Michael Niedermayer
#endif
1478 dc4b78d9 Mike Melanson
            }
1479
        }
1480
    }
1481
1482
     /* this looks like a good place for slice dispatch... */
1483
     /* algorithm:
1484
      *   if (slice == s->macroblock_height - 1)
1485 f44b08a5 Mike Melanson
      *     dispatch (both last slice & 2nd-to-last slice);
1486
      *   else if (slice > 0)
1487
      *     dispatch (slice - 1);
1488 dc4b78d9 Mike Melanson
      */
1489
1490
    emms_c();
1491
}
1492
1493 a54ea19a Mike Melanson
static void apply_loop_filter(Vp3DecodeContext *s)
1494
{
1495 1abbf64e Michael Niedermayer
    int plane;
1496
    int x, y;
1497 f44b08a5 Mike Melanson
    int *bounding_values= s->bounding_values_array+127;
1498 d5e18835 Michael Niedermayer
1499 f44b08a5 Mike Melanson
#if 0
1500 d5e18835 Michael Niedermayer
    int bounding_values_array[256];
1501 a54ea19a Mike Melanson
    int filter_limit;
1502

1503
    /* find the right loop limit value */
1504
    for (x = 63; x >= 0; x--) {
1505
        if (vp31_ac_scale_factor[x] >= s->quality_index)
1506
            break;
1507
    }
1508 d5e18835 Michael Niedermayer
    filter_limit = vp31_filter_limit_values[s->quality_index];
1509 a54ea19a Mike Melanson

1510
    /* set up the bounding values */
1511 d5e18835 Michael Niedermayer
    memset(bounding_values_array, 0, 256 * sizeof(int));
1512 a54ea19a Mike Melanson
    for (x = 0; x < filter_limit; x++) {
1513
        bounding_values[-x - filter_limit] = -filter_limit + x;
1514
        bounding_values[-x] = -x;
1515
        bounding_values[x] = x;
1516
        bounding_values[x + filter_limit] = filter_limit - x;
1517
    }
1518 f44b08a5 Mike Melanson
#endif
1519 a54ea19a Mike Melanson
1520
    for (plane = 0; plane < 3; plane++) {
1521 1abbf64e Michael Niedermayer
        int width           = s->fragment_width  >> !!plane;
1522
        int height          = s->fragment_height >> !!plane;
1523
        int fragment        = s->fragment_start        [plane];
1524
        int stride          = s->current_frame.linesize[plane];
1525
        uint8_t *plane_data = s->current_frame.data    [plane];
1526 1af5f60f Michael Niedermayer
        if (!s->flipped_image) stride = -stride;
1527 a54ea19a Mike Melanson
1528
        for (y = 0; y < height; y++) {
1529 d86053a4 Mike Melanson
1530 a54ea19a Mike Melanson
            for (x = 0; x < width; x++) {
1531
                /* do not perform left edge filter for left columns frags */
1532
                if ((x > 0) &&
1533
                    (s->all_fragments[fragment].coding_method != MODE_COPY)) {
1534 9971331d David Conrad
                    s->dsp.vp3_h_loop_filter(
1535 1af5f60f Michael Niedermayer
                        plane_data + s->all_fragments[fragment].first_pixel,
1536 a54ea19a Mike Melanson
                        stride, bounding_values);
1537
                }
1538
1539
                /* do not perform top edge filter for top row fragments */
1540
                if ((y > 0) &&
1541
                    (s->all_fragments[fragment].coding_method != MODE_COPY)) {
1542 9971331d David Conrad
                    s->dsp.vp3_v_loop_filter(
1543 1af5f60f Michael Niedermayer
                        plane_data + s->all_fragments[fragment].first_pixel,
1544 a54ea19a Mike Melanson
                        stride, bounding_values);
1545
                }
1546
1547
                /* do not perform right edge filter for right column
1548
                 * fragments or if right fragment neighbor is also coded
1549
                 * in this frame (it will be filtered in next iteration) */
1550
                if ((x < width - 1) &&
1551
                    (s->all_fragments[fragment].coding_method != MODE_COPY) &&
1552
                    (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
1553 9971331d David Conrad
                    s->dsp.vp3_h_loop_filter(
1554 1af5f60f Michael Niedermayer
                        plane_data + s->all_fragments[fragment + 1].first_pixel,
1555 a54ea19a Mike Melanson
                        stride, bounding_values);
1556
                }
1557
1558
                /* do not perform bottom edge filter for bottom row
1559
                 * fragments or if bottom fragment neighbor is also coded
1560
                 * in this frame (it will be filtered in the next row) */
1561
                if ((y < height - 1) &&
1562
                    (s->all_fragments[fragment].coding_method != MODE_COPY) &&
1563
                    (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
1564 9971331d David Conrad
                    s->dsp.vp3_v_loop_filter(
1565 1af5f60f Michael Niedermayer
                        plane_data + s->all_fragments[fragment + width].first_pixel,
1566 a54ea19a Mike Melanson
                        stride, bounding_values);
1567
                }
1568
1569
                fragment++;
1570
            }
1571
        }
1572
    }
1573 d86053a4 Mike Melanson
}
1574
1575 115329f1 Diego Biurrun
/*
1576 d86053a4 Mike Melanson
 * This function computes the first pixel addresses for each fragment.
1577
 * This function needs to be invoked after the first frame is allocated
1578
 * so that it has access to the plane strides.
1579
 */
1580 115329f1 Diego Biurrun
static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
1581 d86053a4 Mike Melanson
{
1582 fc961819 David Conrad
#define Y_INITIAL(chroma_shift)  s->flipped_image ? 1  : s->fragment_height >> chroma_shift
1583
#define Y_FINISHED(chroma_shift) s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0
1584 d86053a4 Mike Melanson
1585
    int i, x, y;
1586 fc961819 David Conrad
    const int y_inc = s->flipped_image ? 1 : -1;
1587 d86053a4 Mike Melanson
1588
    /* figure out the first pixel addresses for each of the fragments */
1589
    /* Y plane */
1590
    i = 0;
1591 fc961819 David Conrad
    for (y = Y_INITIAL(0); Y_FINISHED(0); y += y_inc) {
1592 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width; x++) {
1593 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1594 d86053a4 Mike Melanson
                s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
1595
                    s->golden_frame.linesize[0] +
1596
                    x * FRAGMENT_PIXELS;
1597
        }
1598
    }
1599
1600
    /* U plane */
1601 1abbf64e Michael Niedermayer
    i = s->fragment_start[1];
1602 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1603 d86053a4 Mike Melanson
        for (x = 0; x < s->fragment_width / 2; x++) {
1604 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1605 d86053a4 Mike Melanson
                s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
1606
                    s->golden_frame.linesize[1] +
1607
                    x * FRAGMENT_PIXELS;
1608
        }
1609
    }
1610
1611
    /* V plane */
1612 1abbf64e Michael Niedermayer
    i = s->fragment_start[2];
1613 fc961819 David Conrad
    for (y = Y_INITIAL(1); Y_FINISHED(1); y += y_inc) {
1614 9a7ad925 Alex Beregszaszi
        for (x = 0; x < s->fragment_width / 2; x++) {
1615 115329f1 Diego Biurrun
            s->all_fragments[i++].first_pixel =
1616 9a7ad925 Alex Beregszaszi
                s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
1617
                    s->golden_frame.linesize[2] +
1618
                    x * FRAGMENT_PIXELS;
1619
        }
1620
    }
1621
}
1622
1623 d86053a4 Mike Melanson
/*
1624
 * This is the ffmpeg/libavcodec API init function.
1625
 */
1626 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_init(AVCodecContext *avctx)
1627 d86053a4 Mike Melanson
{
1628
    Vp3DecodeContext *s = avctx->priv_data;
1629 ae1dd8e1 Michael Niedermayer
    int i, inter, plane;
1630 892fc83e Mike Melanson
    int c_width;
1631
    int c_height;
1632
    int y_superblock_count;
1633
    int c_superblock_count;
1634 d86053a4 Mike Melanson
1635 3c3f113e Alex Beregszaszi
    if (avctx->codec_tag == MKTAG('V','P','3','0'))
1636 bb270c08 Diego Biurrun
        s->version = 0;
1637 3c3f113e Alex Beregszaszi
    else
1638 bb270c08 Diego Biurrun
        s->version = 1;
1639 3c3f113e Alex Beregszaszi
1640 d86053a4 Mike Melanson
    s->avctx = avctx;
1641 642d7e84 Mike Melanson
    s->width = (avctx->width + 15) & 0xFFFFFFF0;
1642
    s->height = (avctx->height + 15) & 0xFFFFFFF0;
1643 d86053a4 Mike Melanson
    avctx->pix_fmt = PIX_FMT_YUV420P;
1644 8b6103da Michael Niedermayer
    if(avctx->idct_algo==FF_IDCT_AUTO)
1645
        avctx->idct_algo=FF_IDCT_VP3;
1646 d86053a4 Mike Melanson
    dsputil_init(&s->dsp, avctx);
1647 115329f1 Diego Biurrun
1648 36af0c95 Michael Niedermayer
    ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
1649 d86053a4 Mike Melanson
1650
    /* initialize to an impossible value which will force a recalculation
1651
     * in the first frame decode */
1652
    s->quality_index = -1;
1653
1654 892fc83e Mike Melanson
    s->y_superblock_width = (s->width + 31) / 32;
1655
    s->y_superblock_height = (s->height + 31) / 32;
1656
    y_superblock_count = s->y_superblock_width * s->y_superblock_height;
1657
1658
    /* work out the dimensions for the C planes */
1659
    c_width = s->width / 2;
1660
    c_height = s->height / 2;
1661
    s->c_superblock_width = (c_width + 31) / 32;
1662
    s->c_superblock_height = (c_height + 31) / 32;
1663
    c_superblock_count = s->c_superblock_width * s->c_superblock_height;
1664
1665
    s->superblock_count = y_superblock_count + (c_superblock_count * 2);
1666
    s->u_superblock_start = y_superblock_count;
1667
    s->v_superblock_start = s->u_superblock_start + c_superblock_count;
1668 d86053a4 Mike Melanson
    s->superblock_coding = av_malloc(s->superblock_count);
1669
1670
    s->macroblock_width = (s->width + 15) / 16;
1671
    s->macroblock_height = (s->height + 15) / 16;
1672
    s->macroblock_count = s->macroblock_width * s->macroblock_height;
1673
1674
    s->fragment_width = s->width / FRAGMENT_PIXELS;
1675
    s->fragment_height = s->height / FRAGMENT_PIXELS;
1676
1677
    /* fragment count covers all 8x8 blocks for all 3 planes */
1678
    s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
1679 1abbf64e Michael Niedermayer
    s->fragment_start[1] = s->fragment_width * s->fragment_height;
1680
    s->fragment_start[2] = s->fragment_width * s->fragment_height * 5 / 4;
1681 d86053a4 Mike Melanson
1682
    s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
1683 36e16253 Reimar Döffinger
    s->coeff_counts = av_malloc(s->fragment_count * sizeof(*s->coeff_counts));
1684 7beddb12 Michael Niedermayer
    s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
1685 d86053a4 Mike Melanson
    s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
1686 5e534865 Diego Biurrun
    s->pixel_addresses_initialized = 0;
1687 d86053a4 Mike Melanson
1688 f44ee2c3 Alex Beregszaszi
    if (!s->theora_tables)
1689
    {
1690 2287c100 Michael Niedermayer
        for (i = 0; i < 64; i++) {
1691 bb270c08 Diego Biurrun
            s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
1692
            s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
1693 ae1dd8e1 Michael Niedermayer
            s->base_matrix[0][i] = vp31_intra_y_dequant[i];
1694
            s->base_matrix[1][i] = vp31_intra_c_dequant[i];
1695
            s->base_matrix[2][i] = vp31_inter_dequant[i];
1696 bb270c08 Diego Biurrun
            s->filter_limit_values[i] = vp31_filter_limit_values[i];
1697 2287c100 Michael Niedermayer
        }
1698 f44ee2c3 Alex Beregszaszi
1699 ae1dd8e1 Michael Niedermayer
        for(inter=0; inter<2; inter++){
1700
            for(plane=0; plane<3; plane++){
1701
                s->qr_count[inter][plane]= 1;
1702
                s->qr_size [inter][plane][0]= 63;
1703
                s->qr_base [inter][plane][0]=
1704
                s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
1705
            }
1706
        }
1707
1708 39922395 Mike Melanson
        /* init VLC tables */
1709
        for (i = 0; i < 16; i++) {
1710
1711
            /* DC histograms */
1712
            init_vlc(&s->dc_vlc[i], 5, 32,
1713
                &dc_bias[i][0][1], 4, 2,
1714
                &dc_bias[i][0][0], 4, 2, 0);
1715
1716
            /* group 1 AC histograms */
1717
            init_vlc(&s->ac_vlc_1[i], 5, 32,
1718
                &ac_bias_0[i][0][1], 4, 2,
1719
                &ac_bias_0[i][0][0], 4, 2, 0);
1720
1721
            /* group 2 AC histograms */
1722
            init_vlc(&s->ac_vlc_2[i], 5, 32,
1723
                &ac_bias_1[i][0][1], 4, 2,
1724
                &ac_bias_1[i][0][0], 4, 2, 0);
1725
1726
            /* group 3 AC histograms */
1727
            init_vlc(&s->ac_vlc_3[i], 5, 32,
1728
                &ac_bias_2[i][0][1], 4, 2,
1729
                &ac_bias_2[i][0][0], 4, 2, 0);
1730
1731
            /* group 4 AC histograms */
1732
            init_vlc(&s->ac_vlc_4[i], 5, 32,
1733
                &ac_bias_3[i][0][1], 4, 2,
1734
                &ac_bias_3[i][0][0], 4, 2, 0);
1735
        }
1736
    } else {
1737
        for (i = 0; i < 16; i++) {
1738
1739
            /* DC histograms */
1740
            init_vlc(&s->dc_vlc[i], 5, 32,
1741
                &s->huffman_table[i][0][1], 4, 2,
1742
                &s->huffman_table[i][0][0], 4, 2, 0);
1743
1744
            /* group 1 AC histograms */
1745
            init_vlc(&s->ac_vlc_1[i], 5, 32,
1746
                &s->huffman_table[i+16][0][1], 4, 2,
1747
                &s->huffman_table[i+16][0][0], 4, 2, 0);
1748
1749
            /* group 2 AC histograms */
1750
            init_vlc(&s->ac_vlc_2[i], 5, 32,
1751
                &s->huffman_table[i+16*2][0][1], 4, 2,
1752
                &s->huffman_table[i+16*2][0][0], 4, 2, 0);
1753
1754
            /* group 3 AC histograms */
1755
            init_vlc(&s->ac_vlc_3[i], 5, 32,
1756
                &s->huffman_table[i+16*3][0][1], 4, 2,
1757
                &s->huffman_table[i+16*3][0][0], 4, 2, 0);
1758
1759
            /* group 4 AC histograms */
1760
            init_vlc(&s->ac_vlc_4[i], 5, 32,
1761
                &s->huffman_table[i+16*4][0][1], 4, 2,
1762
                &s->huffman_table[i+16*4][0][0], 4, 2, 0);
1763
        }
1764 d86053a4 Mike Melanson
    }
1765
1766 d8278bab Mike Melanson
    init_vlc(&s->superblock_run_length_vlc, 6, 34,
1767
        &superblock_run_length_vlc_table[0][1], 4, 2,
1768
        &superblock_run_length_vlc_table[0][0], 4, 2, 0);
1769
1770 dd36b667 Alex Beregszaszi
    init_vlc(&s->fragment_run_length_vlc, 5, 30,
1771 0ad72bdd Mike Melanson
        &fragment_run_length_vlc_table[0][1], 4, 2,
1772
        &fragment_run_length_vlc_table[0][0], 4, 2, 0);
1773
1774
    init_vlc(&s->mode_code_vlc, 3, 8,
1775
        &mode_code_vlc_table[0][1], 2, 1,
1776
        &mode_code_vlc_table[0][0], 2, 1, 0);
1777
1778
    init_vlc(&s->motion_vector_vlc, 6, 63,
1779
        &motion_vector_vlc_table[0][1], 2, 1,
1780
        &motion_vector_vlc_table[0][0], 2, 1, 0);
1781
1782 d86053a4 Mike Melanson
    /* work out the block mapping tables */
1783
    s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
1784
    s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
1785
    s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
1786 96a7e73b Mike Melanson
    s->macroblock_coding = av_malloc(s->macroblock_count + 1);
1787 d86053a4 Mike Melanson
    init_block_mapping(s);
1788
1789 44ae98dd Mike Melanson
    for (i = 0; i < 3; i++) {
1790
        s->current_frame.data[i] = NULL;
1791
        s->last_frame.data[i] = NULL;
1792
        s->golden_frame.data[i] = NULL;
1793 61873c4a Mike Melanson
    }
1794
1795 d86053a4 Mike Melanson
    return 0;
1796
}
1797
1798
/*
1799
 * This is the ffmpeg/libavcodec API frame decode function.
1800
 */
1801 115329f1 Diego Biurrun
static int vp3_decode_frame(AVCodecContext *avctx,
1802 d86053a4 Mike Melanson
                            void *data, int *data_size,
1803 bed9dc16 Michael Niedermayer
                            const uint8_t *buf, int buf_size)
1804 d86053a4 Mike Melanson
{
1805
    Vp3DecodeContext *s = avctx->priv_data;
1806
    GetBitContext gb;
1807
    static int counter = 0;
1808 dc4b78d9 Mike Melanson
    int i;
1809 d86053a4 Mike Melanson
1810
    init_get_bits(&gb, buf, buf_size * 8);
1811 115329f1 Diego Biurrun
1812 f44ee2c3 Alex Beregszaszi
    if (s->theora && get_bits1(&gb))
1813
    {
1814 bb270c08 Diego Biurrun
        av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
1815
        return -1;
1816 f44ee2c3 Alex Beregszaszi
    }
1817 3c3f113e Alex Beregszaszi
1818
    s->keyframe = !get_bits1(&gb);
1819
    if (!s->theora)
1820 bb270c08 Diego Biurrun
        skip_bits(&gb, 1);
1821 3c3f113e Alex Beregszaszi
    s->last_quality_index = s->quality_index;
1822 efea8528 Michael Niedermayer
1823
    s->nqis=0;
1824
    do{
1825
        s->qis[s->nqis++]= get_bits(&gb, 6);
1826
    } while(s->theora >= 0x030200 && s->nqis<3 && get_bits1(&gb));
1827
1828
    s->quality_index= s->qis[0];
1829 d86053a4 Mike Melanson
1830 f8830383 Alex Beregszaszi
    if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1831 bb270c08 Diego Biurrun
        av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
1832
            s->keyframe?"key":"", counter, s->quality_index);
1833 d86053a4 Mike Melanson
    counter++;
1834
1835 f44b08a5 Mike Melanson
    if (s->quality_index != s->last_quality_index) {
1836 642d7e84 Mike Melanson
        init_dequantizer(s);
1837 f44b08a5 Mike Melanson
        init_loop_filter(s);
1838
    }
1839 642d7e84 Mike Melanson
1840 068e82ba David Conrad
    if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
1841
        return buf_size;
1842
1843 d86053a4 Mike Melanson
    if (s->keyframe) {
1844 bb270c08 Diego Biurrun
        if (!s->theora)
1845
        {
1846
            skip_bits(&gb, 4); /* width code */
1847
            skip_bits(&gb, 4); /* height code */
1848
            if (s->version)
1849
            {
1850
                s->version = get_bits(&gb, 5);
1851
                if (counter == 1)
1852
                    av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
1853
            }
1854
        }
1855
        if (s->version || s->theora)
1856
        {
1857
                if (get_bits1(&gb))
1858
                    av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
1859
            skip_bits(&gb, 2); /* reserved? */
1860
        }
1861 3c3f113e Alex Beregszaszi
1862 74c0ac12 Mike Melanson
        if (s->last_frame.data[0] == s->golden_frame.data[0]) {
1863
            if (s->golden_frame.data[0])
1864
                avctx->release_buffer(avctx, &s->golden_frame);
1865 8e39d4a7 Michael Niedermayer
            s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
1866 74c0ac12 Mike Melanson
        } else {
1867
            if (s->golden_frame.data[0])
1868
                avctx->release_buffer(avctx, &s->golden_frame);
1869
            if (s->last_frame.data[0])
1870
                avctx->release_buffer(avctx, &s->last_frame);
1871
        }
1872 d86053a4 Mike Melanson
1873 8e39d4a7 Michael Niedermayer
        s->golden_frame.reference = 3;
1874 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
1875 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
1876 d86053a4 Mike Melanson
            return -1;
1877
        }
1878
1879
        /* golden frame is also the current frame */
1880 4501e678 Michael Niedermayer
        s->current_frame= s->golden_frame;
1881 d86053a4 Mike Melanson
1882
        /* time to figure out pixel addresses? */
1883 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized)
1884 bb270c08 Diego Biurrun
        {
1885 ba31df31 David Conrad
            vp3_calculate_pixel_addresses(s);
1886 5e534865 Diego Biurrun
            s->pixel_addresses_initialized = 1;
1887 bb270c08 Diego Biurrun
        }
1888 d86053a4 Mike Melanson
    } else {
1889
        /* allocate a new current frame */
1890 8e39d4a7 Michael Niedermayer
        s->current_frame.reference = 3;
1891 5e534865 Diego Biurrun
        if (!s->pixel_addresses_initialized) {
1892 bc185f72 Reimar Döffinger
            av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n");
1893
            return -1;
1894
        }
1895 d86053a4 Mike Melanson
        if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
1896 9b879566 Michel Bardiaux
            av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
1897 d86053a4 Mike Melanson
            return -1;
1898
        }
1899
    }
1900
1901 b928ec64 Michael Niedermayer
    s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
1902
    s->current_frame.qstride= 0;
1903
1904 d86053a4 Mike Melanson
    init_frame(s, &gb);
1905
1906 220a6f40 Michael Niedermayer
    if (unpack_superblocks(s, &gb)){
1907
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
1908
        return -1;
1909
    }
1910
    if (unpack_modes(s, &gb)){
1911
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
1912
        return -1;
1913
    }
1914
    if (unpack_vectors(s, &gb)){
1915
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
1916
        return -1;
1917
    }
1918
    if (unpack_dct_coeffs(s, &gb)){
1919
        av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
1920 892fc83e Mike Melanson
        return -1;
1921
    }
1922 d86053a4 Mike Melanson
1923
    reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
1924 3d32b429 Mike Melanson
    if ((avctx->flags & CODEC_FLAG_GRAY) == 0) {
1925 1abbf64e Michael Niedermayer
        reverse_dc_prediction(s, s->fragment_start[1],
1926 3d32b429 Mike Melanson
            s->fragment_width / 2, s->fragment_height / 2);
1927 1abbf64e Michael Niedermayer
        reverse_dc_prediction(s, s->fragment_start[2],
1928 3d32b429 Mike Melanson
            s->fragment_width / 2, s->fragment_height / 2);
1929 dc4b78d9 Mike Melanson
    }
1930
1931
    for (i = 0; i < s->macroblock_height; i++)
1932
        render_slice(s, i);
1933 d86053a4 Mike Melanson
1934 72053728 Michael Niedermayer
    apply_loop_filter(s);
1935 892fc83e Mike Melanson
1936 d86053a4 Mike Melanson
    *data_size=sizeof(AVFrame);
1937
    *(AVFrame*)data= s->current_frame;
1938
1939 44ae98dd Mike Melanson
    /* release the last frame, if it is allocated and if it is not the
1940
     * golden frame */
1941
    if ((s->last_frame.data[0]) &&
1942
        (s->last_frame.data[0] != s->golden_frame.data[0]))
1943
        avctx->release_buffer(avctx, &s->last_frame);
1944 d86053a4 Mike Melanson
1945 61873c4a Mike Melanson
    /* shuffle frames (last = current) */
1946 4501e678 Michael Niedermayer
    s->last_frame= s->current_frame;
1947 8e39d4a7 Michael Niedermayer
    s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
1948 d86053a4 Mike Melanson
1949
    return buf_size;
1950
}
1951
1952
/*
1953
 * This is the ffmpeg/libavcodec API module cleanup function.
1954
 */
1955 98a6fff9 Zuxy Meng
static av_cold int vp3_decode_end(AVCodecContext *avctx)
1956 d86053a4 Mike Melanson
{
1957
    Vp3DecodeContext *s = avctx->priv_data;
1958 6f4e2b5a Måns Rullgård
    int i;
1959 d86053a4 Mike Melanson
1960 6f4e2b5a Måns Rullgård
    av_free(s->superblock_coding);
1961 d86053a4 Mike Melanson
    av_free(s->all_fragments);
1962 36e16253 Reimar Döffinger
    av_free(s->coeff_counts);
1963 a2df5a50 Michael Niedermayer
    av_free(s->coeffs);
1964 d86053a4 Mike Melanson
    av_free(s->coded_fragment_list);
1965
    av_free(s->superblock_fragments);
1966
    av_free(s->superblock_macroblocks);
1967
    av_free(s->macroblock_fragments);
1968 96a7e73b Mike Melanson
    av_free(s->macroblock_coding);
1969 115329f1 Diego Biurrun
1970 6f4e2b5a Måns Rullgård
    for (i = 0; i < 16; i++) {
1971
        free_vlc(&s->dc_vlc[i]);
1972
        free_vlc(&s->ac_vlc_1[i]);
1973
        free_vlc(&s->ac_vlc_2[i]);
1974
        free_vlc(&s->ac_vlc_3[i]);
1975
        free_vlc(&s->ac_vlc_4[i]);
1976
    }
1977
1978
    free_vlc(&s->superblock_run_length_vlc);
1979
    free_vlc(&s->fragment_run_length_vlc);
1980
    free_vlc(&s->mode_code_vlc);
1981
    free_vlc(&s->motion_vector_vlc);
1982
1983 d86053a4 Mike Melanson
    /* release all frames */
1984 8e39d4a7 Michael Niedermayer
    if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
1985 892fc83e Mike Melanson
        avctx->release_buffer(avctx, &s->golden_frame);
1986
    if (s->last_frame.data[0])
1987
        avctx->release_buffer(avctx, &s->last_frame);
1988
    /* no need to release the current_frame since it will always be pointing
1989
     * to the same frame as either the golden or last frame */
1990 d86053a4 Mike Melanson
1991
    return 0;
1992
}
1993
1994 39922395 Mike Melanson
static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
1995
{
1996
    Vp3DecodeContext *s = avctx->priv_data;
1997
1998 5fc32c27 Alex Beregszaszi
    if (get_bits1(gb)) {
1999 39922395 Mike Melanson
        int token;
2000
        if (s->entries >= 32) { /* overflow */
2001
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2002
            return -1;
2003
        }
2004
        token = get_bits(gb, 5);
2005
        //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);
2006
        s->huffman_table[s->hti][token][0] = s->hbits;
2007
        s->huffman_table[s->hti][token][1] = s->huff_code_size;
2008
        s->entries++;
2009
    }
2010
    else {
2011
        if (s->huff_code_size >= 32) {/* overflow */
2012
            av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
2013
            return -1;
2014
        }
2015
        s->huff_code_size++;
2016
        s->hbits <<= 1;
2017
        read_huffman_tree(avctx, gb);
2018
        s->hbits |= 1;
2019
        read_huffman_tree(avctx, gb);
2020
        s->hbits >>= 1;
2021
        s->huff_code_size--;
2022
    }
2023
    return 0;
2024
}
2025
2026 b250f9c6 Aurelien Jacobs
#if CONFIG_THEORA_DECODER
2027 e278056f Michael Niedermayer
static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
2028 f44ee2c3 Alex Beregszaszi
{
2029
    Vp3DecodeContext *s = avctx->priv_data;
2030 c0f716b8 Aurelien Jacobs
    int visible_width, visible_height;
2031 9a7ad925 Alex Beregszaszi
2032 e278056f Michael Niedermayer
    s->theora = get_bits_long(gb, 24);
2033 356306ac Diego Biurrun
    av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
2034 105c3d25 Alex Beregszaszi
2035 ba7ee4a4 Matthieu Castet
    /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
2036 9a7ad925 Alex Beregszaszi
    /* but previous versions have the image flipped relative to vp3 */
2037 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2038 9a7ad925 Alex Beregszaszi
    {
2039 bb270c08 Diego Biurrun
        s->flipped_image = 1;
2040 9a7ad925 Alex Beregszaszi
        av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
2041
    }
2042 f44ee2c3 Alex Beregszaszi
2043 277e3e53 David Conrad
    visible_width  = s->width  = get_bits(gb, 16) << 4;
2044
    visible_height = s->height = get_bits(gb, 16) << 4;
2045 115329f1 Diego Biurrun
2046 0ecca7a4 Michael Niedermayer
    if(avcodec_check_dimensions(avctx, s->width, s->height)){
2047 7146d2c2 Alex Beregszaszi
        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
2048 0ecca7a4 Michael Niedermayer
        s->width= s->height= 0;
2049
        return -1;
2050
    }
2051 7146d2c2 Alex Beregszaszi
2052
    if (s->theora >= 0x030400)
2053
    {
2054 e278056f Michael Niedermayer
        skip_bits(gb, 32); /* total number of superblocks in a frame */
2055 bb270c08 Diego Biurrun
        // fixme, the next field is 36bits long
2056 e278056f Michael Niedermayer
        skip_bits(gb, 32); /* total number of blocks in a frame */
2057
        skip_bits(gb, 4); /* total number of blocks in a frame */
2058
        skip_bits(gb, 32); /* total number of macroblocks in a frame */
2059 7146d2c2 Alex Beregszaszi
    }
2060 f44ee2c3 Alex Beregszaszi
2061 277e3e53 David Conrad
    if (s->theora >= 0x030200) {
2062 a0ce2d1b David Conrad
        visible_width  = get_bits_long(gb, 24);
2063
        visible_height = get_bits_long(gb, 24);
2064 c0f716b8 Aurelien Jacobs
2065 ba4816a0 Aurelien Jacobs
        skip_bits(gb, 8); /* offset x */
2066
        skip_bits(gb, 8); /* offset y */
2067
    }
2068 f44ee2c3 Alex Beregszaszi
2069 e278056f Michael Niedermayer
    skip_bits(gb, 32); /* fps numerator */
2070
    skip_bits(gb, 32); /* fps denumerator */
2071
    skip_bits(gb, 24); /* aspect numerator */
2072
    skip_bits(gb, 24); /* aspect denumerator */
2073 115329f1 Diego Biurrun
2074 ba7ee4a4 Matthieu Castet
    if (s->theora < 0x030200)
2075 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2076
    skip_bits(gb, 8); /* colorspace */
2077 7146d2c2 Alex Beregszaszi
    if (s->theora >= 0x030400)
2078 e278056f Michael Niedermayer
        skip_bits(gb, 2); /* pixel format: 420,res,422,444 */
2079
    skip_bits(gb, 24); /* bitrate */
2080 f44ee2c3 Alex Beregszaszi
2081 e278056f Michael Niedermayer
    skip_bits(gb, 6); /* quality hint */
2082 115329f1 Diego Biurrun
2083 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2084 105c3d25 Alex Beregszaszi
    {
2085 e278056f Michael Niedermayer
        skip_bits(gb, 5); /* keyframe frequency force */
2086 115329f1 Diego Biurrun
2087 bb270c08 Diego Biurrun
        if (s->theora < 0x030400)
2088 e278056f Michael Niedermayer
            skip_bits(gb, 5); /* spare bits */
2089 105c3d25 Alex Beregszaszi
    }
2090 115329f1 Diego Biurrun
2091 e278056f Michael Niedermayer
//    align_get_bits(gb);
2092 115329f1 Diego Biurrun
2093 c0f716b8 Aurelien Jacobs
    if (   visible_width  <= s->width  && visible_width  > s->width-16
2094
        && visible_height <= s->height && visible_height > s->height-16)
2095
        avcodec_set_dimensions(avctx, visible_width, visible_height);
2096
    else
2097
        avcodec_set_dimensions(avctx, s->width, s->height);
2098 f44ee2c3 Alex Beregszaszi
2099
    return 0;
2100
}
2101
2102 e278056f Michael Niedermayer
static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
2103 f44ee2c3 Alex Beregszaszi
{
2104
    Vp3DecodeContext *s = avctx->priv_data;
2105 ae1dd8e1 Michael Niedermayer
    int i, n, matrices, inter, plane;
2106 ba7ee4a4 Matthieu Castet
2107
    if (s->theora >= 0x030200) {
2108 e278056f Michael Niedermayer
        n = get_bits(gb, 3);
2109 9c7154c7 Mike Melanson
        /* loop filter limit values table */
2110 ba7ee4a4 Matthieu Castet
        for (i = 0; i < 64; i++)
2111 e278056f Michael Niedermayer
            s->filter_limit_values[i] = get_bits(gb, n);
2112 ba7ee4a4 Matthieu Castet
    }
2113 115329f1 Diego Biurrun
2114 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2115 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2116 ba7ee4a4 Matthieu Castet
    else
2117
        n = 16;
2118 f44ee2c3 Alex Beregszaszi
    /* quality threshold table */
2119
    for (i = 0; i < 64; i++)
2120 e278056f Michael Niedermayer
        s->coded_ac_scale_factor[i] = get_bits(gb, n);
2121 f44ee2c3 Alex Beregszaszi
2122 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2123 e278056f Michael Niedermayer
        n = get_bits(gb, 4) + 1;
2124 ba7ee4a4 Matthieu Castet
    else
2125
        n = 16;
2126 f44ee2c3 Alex Beregszaszi
    /* dc scale factor table */
2127
    for (i = 0; i < 64; i++)
2128 e278056f Michael Niedermayer
        s->coded_dc_scale_factor[i] = get_bits(gb, n);
2129 f44ee2c3 Alex Beregszaszi
2130 ba7ee4a4 Matthieu Castet
    if (s->theora >= 0x030200)
2131 e278056f Michael Niedermayer
        matrices = get_bits(gb, 9) + 1;
2132 ba7ee4a4 Matthieu Castet
    else
2133 2da2ba03 Matthieu Castet
        matrices = 3;
2134 f44ee2c3 Alex Beregszaszi
2135 ae1dd8e1 Michael Niedermayer
    if(matrices > 384){
2136
        av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
2137
        return -1;
2138
    }
2139 3c3f113e Alex Beregszaszi
2140 ae1dd8e1 Michael Niedermayer
    for(n=0; n<matrices; n++){
2141 bb270c08 Diego Biurrun
        for (i = 0; i < 64; i++)
2142 ae1dd8e1 Michael Niedermayer
            s->base_matrix[n][i]= get_bits(gb, 8);
2143
    }
2144 2da2ba03 Matthieu Castet
2145 ae1dd8e1 Michael Niedermayer
    for (inter = 0; inter <= 1; inter++) {
2146
        for (plane = 0; plane <= 2; plane++) {
2147
            int newqr= 1;
2148
            if (inter || plane > 0)
2149 5fc32c27 Alex Beregszaszi
                newqr = get_bits1(gb);
2150 39922395 Mike Melanson
            if (!newqr) {
2151 ae1dd8e1 Michael Niedermayer
                int qtj, plj;
2152 5fc32c27 Alex Beregszaszi
                if(inter && get_bits1(gb)){
2153 ae1dd8e1 Michael Niedermayer
                    qtj = 0;
2154
                    plj = plane;
2155
                }else{
2156
                    qtj= (3*inter + plane - 1) / 3;
2157
                    plj= (plane + 2) % 3;
2158
                }
2159
                s->qr_count[inter][plane]= s->qr_count[qtj][plj];
2160
                memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
2161
                memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
2162
            } else {
2163
                int qri= 0;
2164 39922395 Mike Melanson
                int qi = 0;
2165 ae1dd8e1 Michael Niedermayer
2166
                for(;;){
2167
                    i= get_bits(gb, av_log2(matrices-1)+1);
2168
                    if(i>= matrices){
2169
                        av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
2170
                        return -1;
2171
                    }
2172
                    s->qr_base[inter][plane][qri]= i;
2173
                    if(qi >= 63)
2174
                        break;
2175
                    i = get_bits(gb, av_log2(63-qi)+1) + 1;
2176
                    s->qr_size[inter][plane][qri++]= i;
2177
                    qi += i;
2178 39922395 Mike Melanson
                }
2179 ae1dd8e1 Michael Niedermayer
2180 2da2ba03 Matthieu Castet
                if (qi > 63) {
2181 7146d2c2 Alex Beregszaszi
                    av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
2182 bb270c08 Diego Biurrun
                    return -1;
2183
                }
2184 ae1dd8e1 Michael Niedermayer
                s->qr_count[inter][plane]= qri;
2185 39922395 Mike Melanson
            }
2186
        }
2187
    }
2188
2189 2da2ba03 Matthieu Castet
    /* Huffman tables */
2190 39922395 Mike Melanson
    for (s->hti = 0; s->hti < 80; s->hti++) {
2191
        s->entries = 0;
2192
        s->huff_code_size = 1;
2193 5fc32c27 Alex Beregszaszi
        if (!get_bits1(gb)) {
2194 39922395 Mike Melanson
            s->hbits = 0;
2195 e278056f Michael Niedermayer
            read_huffman_tree(avctx, gb);
2196 39922395 Mike Melanson
            s->hbits = 1;
2197 e278056f Michael Niedermayer
            read_huffman_tree(avctx, gb);
2198 39922395 Mike Melanson
        }
2199
    }
2200 115329f1 Diego Biurrun
2201 f44ee2c3 Alex Beregszaszi
    s->theora_tables = 1;
2202 115329f1 Diego Biurrun
2203 f44ee2c3 Alex Beregszaszi
    return 0;
2204
}
2205
2206
static int theora_decode_init(AVCodecContext *avctx)
2207
{
2208
    Vp3DecodeContext *s = avctx->priv_data;
2209
    GetBitContext gb;
2210
    int ptype;
2211 da91ed59 Aurelien Jacobs
    uint8_t *header_start[3];
2212
    int header_len[3];
2213
    int i;
2214 115329f1 Diego Biurrun
2215 f44ee2c3 Alex Beregszaszi
    s->theora = 1;
2216
2217
    if (!avctx->extradata_size)
2218 7146d2c2 Alex Beregszaszi
    {
2219
        av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
2220 bb270c08 Diego Biurrun
        return -1;
2221 7146d2c2 Alex Beregszaszi
    }
2222 f44ee2c3 Alex Beregszaszi
2223 da91ed59 Aurelien Jacobs
    if (ff_split_xiph_headers(avctx->extradata, avctx->extradata_size,
2224
                              42, header_start, header_len) < 0) {
2225
        av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
2226
        return -1;
2227
    }
2228 ee89b2b9 Michael Niedermayer
2229 da91ed59 Aurelien Jacobs
  for(i=0;i<3;i++) {
2230
    init_get_bits(&gb, header_start[i], header_len[i]);
2231 f44ee2c3 Alex Beregszaszi
2232
    ptype = get_bits(&gb, 8);
2233 115329f1 Diego Biurrun
2234 7146d2c2 Alex Beregszaszi
     if (!(ptype & 0x80))
2235
     {
2236
        av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
2237 e278056f Michael Niedermayer
//        return -1;
2238 115329f1 Diego Biurrun
     }
2239 7146d2c2 Alex Beregszaszi
2240 3700dab4 Diego Biurrun
    // FIXME: Check for this as well.
2241 f44ee2c3 Alex Beregszaszi
    skip_bits(&gb, 6*8); /* "theora" */
2242 115329f1 Diego Biurrun
2243 f44ee2c3 Alex Beregszaszi
    switch(ptype)
2244
    {
2245
        case 0x80:
2246 e278056f Michael Niedermayer
            theora_decode_header(avctx, &gb);
2247 bb270c08 Diego Biurrun
                break;
2248
        case 0x81:
2249 2da2ba03 Matthieu Castet
// FIXME: is this needed? it breaks sometimes
2250 bb270c08 Diego Biurrun
//            theora_decode_comments(avctx, gb);
2251
            break;
2252
        case 0x82:
2253 e278056f Michael Niedermayer
            theora_decode_tables(avctx, &gb);
2254 bb270c08 Diego Biurrun
            break;
2255
        default:
2256
            av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
2257
            break;
2258 f44ee2c3 Alex Beregszaszi
    }
2259 12ce1f3f David Conrad
    if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
2260
        av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
2261 116d866c Matthieu Castet
    if (s->theora < 0x030200)
2262
        break;
2263 ee89b2b9 Michael Niedermayer
  }
2264 f44ee2c3 Alex Beregszaszi
2265 ba7ee4a4 Matthieu Castet
    vp3_decode_init(avctx);
2266 f44ee2c3 Alex Beregszaszi
    return 0;
2267
}
2268
2269 6f6a3e2a Diego Biurrun
AVCodec theora_decoder = {
2270
    "theora",
2271 d86053a4 Mike Melanson
    CODEC_TYPE_VIDEO,
2272 6f6a3e2a Diego Biurrun
    CODEC_ID_THEORA,
2273 d86053a4 Mike Melanson
    sizeof(Vp3DecodeContext),
2274 6f6a3e2a Diego Biurrun
    theora_decode_init,
2275 d86053a4 Mike Melanson
    NULL,
2276
    vp3_decode_end,
2277
    vp3_decode_frame,
2278
    0,
2279 d5202e4f Stefano Sabatini
    NULL,
2280 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("Theora"),
2281 d86053a4 Mike Melanson
};
2282 6f6a3e2a Diego Biurrun
#endif
2283 f44ee2c3 Alex Beregszaszi
2284 6f6a3e2a Diego Biurrun
AVCodec vp3_decoder = {
2285
    "vp3",
2286 f44ee2c3 Alex Beregszaszi
    CODEC_TYPE_VIDEO,
2287 6f6a3e2a Diego Biurrun
    CODEC_ID_VP3,
2288 f44ee2c3 Alex Beregszaszi
    sizeof(Vp3DecodeContext),
2289 6f6a3e2a Diego Biurrun
    vp3_decode_init,
2290 f44ee2c3 Alex Beregszaszi
    NULL,
2291
    vp3_decode_end,
2292
    vp3_decode_frame,
2293
    0,
2294 d5202e4f Stefano Sabatini
    NULL,
2295 fe4bf374 Stefano Sabatini
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
2296 f44ee2c3 Alex Beregszaszi
};