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-rw-r--r--src/libffmpeg/libavcodec/vp3.c2657
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diff --git a/src/libffmpeg/libavcodec/vp3.c b/src/libffmpeg/libavcodec/vp3.c
deleted file mode 100644
index f02215407..000000000
--- a/src/libffmpeg/libavcodec/vp3.c
+++ /dev/null
@@ -1,2657 +0,0 @@
-/*
- * Copyright (C) 2003-2004 the ffmpeg project
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- */
-
-/**
- * @file vp3.c
- * On2 VP3 Video Decoder
- *
- * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
- * For more information about the VP3 coding process, visit:
- * http://multimedia.cx/
- *
- * Theora decoder by Alex Beregszaszi
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "common.h"
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-#include "vp3data.h"
-
-#define FRAGMENT_PIXELS 8
-
-/*
- * Debugging Variables
- *
- * Define one or more of the following compile-time variables to 1 to obtain
- * elaborate information about certain aspects of the decoding process.
- *
- * KEYFRAMES_ONLY: set this to 1 to only see keyframes (VP3 slideshow mode)
- * DEBUG_VP3: high-level decoding flow
- * DEBUG_INIT: initialization parameters
- * DEBUG_DEQUANTIZERS: display how the dequanization tables are built
- * DEBUG_BLOCK_CODING: unpacking the superblock/macroblock/fragment coding
- * DEBUG_MODES: unpacking the coding modes for individual fragments
- * DEBUG_VECTORS: display the motion vectors
- * DEBUG_TOKEN: display exhaustive information about each DCT token
- * DEBUG_VLC: display the VLCs as they are extracted from the stream
- * DEBUG_DC_PRED: display the process of reversing DC prediction
- * DEBUG_IDCT: show every detail of the IDCT process
- */
-
-#define KEYFRAMES_ONLY 0
-
-#define DEBUG_VP3 0
-#define DEBUG_INIT 0
-#define DEBUG_DEQUANTIZERS 0
-#define DEBUG_BLOCK_CODING 0
-#define DEBUG_MODES 0
-#define DEBUG_VECTORS 0
-#define DEBUG_TOKEN 0
-#define DEBUG_VLC 0
-#define DEBUG_DC_PRED 0
-#define DEBUG_IDCT 0
-
-#if DEBUG_VP3
-#define debug_vp3(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_vp3(const char *format, ...) { }
-#endif
-
-#if DEBUG_INIT
-#define debug_init(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_init(const char *format, ...) { }
-#endif
-
-#if DEBUG_DEQUANTIZERS
-#define debug_dequantizers(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_dequantizers(const char *format, ...) { }
-#endif
-
-#if DEBUG_BLOCK_CODING
-#define debug_block_coding(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_block_coding(const char *format, ...) { }
-#endif
-
-#if DEBUG_MODES
-#define debug_modes(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_modes(const char *format, ...) { }
-#endif
-
-#if DEBUG_VECTORS
-#define debug_vectors(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_vectors(const char *format, ...) { }
-#endif
-
-#if DEBUG_TOKEN
-#define debug_token(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_token(const char *format, ...) { }
-#endif
-
-#if DEBUG_VLC
-#define debug_vlc(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_vlc(const char *format, ...) { }
-#endif
-
-#if DEBUG_DC_PRED
-#define debug_dc_pred(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_dc_pred(const char *format, ...) { }
-#endif
-
-#if DEBUG_IDCT
-#define debug_idct(args...) av_log(NULL, AV_LOG_DEBUG, ## args)
-#else
-static inline void debug_idct(const char *format, ...) { }
-#endif
-
-typedef struct Coeff {
- struct Coeff *next;
- DCTELEM coeff;
- uint8_t index;
-} Coeff;
-
-//FIXME split things out into their own arrays
-typedef struct Vp3Fragment {
- Coeff *next_coeff;
- /* address of first pixel taking into account which plane the fragment
- * lives on as well as the plane stride */
- int first_pixel;
- /* this is the macroblock that the fragment belongs to */
- uint16_t macroblock;
- uint8_t coding_method;
- uint8_t coeff_count;
- int8_t motion_x;
- int8_t motion_y;
-} Vp3Fragment;
-
-#define SB_NOT_CODED 0
-#define SB_PARTIALLY_CODED 1
-#define SB_FULLY_CODED 2
-
-#define MODE_INTER_NO_MV 0
-#define MODE_INTRA 1
-#define MODE_INTER_PLUS_MV 2
-#define MODE_INTER_LAST_MV 3
-#define MODE_INTER_PRIOR_LAST 4
-#define MODE_USING_GOLDEN 5
-#define MODE_GOLDEN_MV 6
-#define MODE_INTER_FOURMV 7
-#define CODING_MODE_COUNT 8
-
-/* special internal mode */
-#define MODE_COPY 8
-
-/* There are 6 preset schemes, plus a free-form scheme */
-static int ModeAlphabet[7][CODING_MODE_COUNT] =
-{
- /* this is the custom scheme */
- { 0, 0, 0, 0, 0, 0, 0, 0 },
-
- /* scheme 1: Last motion vector dominates */
- { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 2 */
- { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 3 */
- { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
- MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 4 */
- { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
- MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 5: No motion vector dominates */
- { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
- MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 6 */
- { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
- MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_PLUS_MV, MODE_INTRA,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
-};
-
-#define MIN_DEQUANT_VAL 2
-
-typedef struct Vp3DecodeContext {
- AVCodecContext *avctx;
- int theora, theora_tables;
- int version;
- int width, height;
- AVFrame golden_frame;
- AVFrame last_frame;
- AVFrame current_frame;
- int keyframe;
- DSPContext dsp;
- int flipped_image;
-
- int qis[3];
- int nqis;
- int quality_index;
- int last_quality_index;
-
- int superblock_count;
- int superblock_width;
- int superblock_height;
- int y_superblock_width;
- int y_superblock_height;
- int c_superblock_width;
- int c_superblock_height;
- int u_superblock_start;
- int v_superblock_start;
- unsigned char *superblock_coding;
-
- int macroblock_count;
- int macroblock_width;
- int macroblock_height;
-
- int fragment_count;
- int fragment_width;
- int fragment_height;
-
- Vp3Fragment *all_fragments;
- Coeff *coeffs;
- Coeff *next_coeff;
- int fragment_start[3];
-
- ScanTable scantable;
-
- /* tables */
- uint16_t coded_dc_scale_factor[64];
- uint32_t coded_ac_scale_factor[64];
- uint8_t base_matrix[384][64];
- uint8_t qr_count[2][3];
- uint8_t qr_size [2][3][64];
- uint16_t qr_base[2][3][64];
-
- /* this is a list of indices into the all_fragments array indicating
- * which of the fragments are coded */
- int *coded_fragment_list;
- int coded_fragment_list_index;
- int pixel_addresses_inited;
-
- VLC dc_vlc[16];
- VLC ac_vlc_1[16];
- VLC ac_vlc_2[16];
- VLC ac_vlc_3[16];
- VLC ac_vlc_4[16];
-
- VLC superblock_run_length_vlc;
- VLC fragment_run_length_vlc;
- VLC mode_code_vlc;
- VLC motion_vector_vlc;
-
- /* these arrays need to be on 16-byte boundaries since SSE2 operations
- * index into them */
- DECLARE_ALIGNED_16(int16_t, qmat[2][4][64]); //<qmat[is_inter][plane]
-
- /* This table contains superblock_count * 16 entries. Each set of 16
- * numbers corresponds to the fragment indices 0..15 of the superblock.
- * An entry will be -1 to indicate that no entry corresponds to that
- * index. */
- int *superblock_fragments;
-
- /* This table contains superblock_count * 4 entries. Each set of 4
- * numbers corresponds to the macroblock indices 0..3 of the superblock.
- * An entry will be -1 to indicate that no entry corresponds to that
- * index. */
- int *superblock_macroblocks;
-
- /* This table contains macroblock_count * 6 entries. Each set of 6
- * numbers corresponds to the fragment indices 0..5 which comprise
- * the macroblock (4 Y fragments and 2 C fragments). */
- int *macroblock_fragments;
- /* This is an array that indicates how a particular macroblock
- * is coded. */
- unsigned char *macroblock_coding;
-
- int first_coded_y_fragment;
- int first_coded_c_fragment;
- int last_coded_y_fragment;
- int last_coded_c_fragment;
-
- uint8_t edge_emu_buffer[9*2048]; //FIXME dynamic alloc
- int8_t qscale_table[2048]; //FIXME dynamic alloc (width+15)/16
-
- /* Huffman decode */
- int hti;
- unsigned int hbits;
- int entries;
- int huff_code_size;
- uint16_t huffman_table[80][32][2];
-
- uint32_t filter_limit_values[64];
- int bounding_values_array[256];
-} Vp3DecodeContext;
-
-static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
-
-/************************************************************************
- * VP3 specific functions
- ************************************************************************/
-
-/*
- * This function sets up all of the various blocks mappings:
- * superblocks <-> fragments, macroblocks <-> fragments,
- * superblocks <-> macroblocks
- *
- * Returns 0 is successful; returns 1 if *anything* went wrong.
- */
-static int init_block_mapping(Vp3DecodeContext *s)
-{
- int i, j;
- signed int hilbert_walk_mb[4];
-
- int current_fragment = 0;
- int current_width = 0;
- int current_height = 0;
- int right_edge = 0;
- int bottom_edge = 0;
- int superblock_row_inc = 0;
- int *hilbert = NULL;
- int mapping_index = 0;
-
- int current_macroblock;
- int c_fragment;
-
- signed char travel_width[16] = {
- 1, 1, 0, -1,
- 0, 0, 1, 0,
- 1, 0, 1, 0,
- 0, -1, 0, 1
- };
-
- signed char travel_height[16] = {
- 0, 0, 1, 0,
- 1, 1, 0, -1,
- 0, 1, 0, -1,
- -1, 0, -1, 0
- };
-
- signed char travel_width_mb[4] = {
- 1, 0, 1, 0
- };
-
- signed char travel_height_mb[4] = {
- 0, 1, 0, -1
- };
-
- debug_vp3(" vp3: initialize block mapping tables\n");
-
- hilbert_walk_mb[0] = 1;
- hilbert_walk_mb[1] = s->macroblock_width;
- hilbert_walk_mb[2] = 1;
- hilbert_walk_mb[3] = -s->macroblock_width;
-
- /* iterate through each superblock (all planes) and map the fragments */
- for (i = 0; i < s->superblock_count; i++) {
- debug_init(" superblock %d (u starts @ %d, v starts @ %d)\n",
- i, s->u_superblock_start, s->v_superblock_start);
-
- /* time to re-assign the limits? */
- if (i == 0) {
-
- /* start of Y superblocks */
- right_edge = s->fragment_width;
- bottom_edge = s->fragment_height;
- current_width = -1;
- current_height = 0;
- superblock_row_inc = 3 * s->fragment_width -
- (s->y_superblock_width * 4 - s->fragment_width);
-
- /* the first operation for this variable is to advance by 1 */
- current_fragment = -1;
-
- } else if (i == s->u_superblock_start) {
-
- /* start of U superblocks */
- right_edge = s->fragment_width / 2;
- bottom_edge = s->fragment_height / 2;
- current_width = -1;
- current_height = 0;
- superblock_row_inc = 3 * (s->fragment_width / 2) -
- (s->c_superblock_width * 4 - s->fragment_width / 2);
-
- /* the first operation for this variable is to advance by 1 */
- current_fragment = s->fragment_start[1] - 1;
-
- } else if (i == s->v_superblock_start) {
-
- /* start of V superblocks */
- right_edge = s->fragment_width / 2;
- bottom_edge = s->fragment_height / 2;
- current_width = -1;
- current_height = 0;
- superblock_row_inc = 3 * (s->fragment_width / 2) -
- (s->c_superblock_width * 4 - s->fragment_width / 2);
-
- /* the first operation for this variable is to advance by 1 */
- current_fragment = s->fragment_start[2] - 1;
-
- }
-
- if (current_width >= right_edge - 1) {
- /* reset width and move to next superblock row */
- current_width = -1;
- current_height += 4;
-
- /* fragment is now at the start of a new superblock row */
- current_fragment += superblock_row_inc;
- }
-
- /* iterate through all 16 fragments in a superblock */
- for (j = 0; j < 16; j++) {
- current_fragment += travel_width[j] + right_edge * travel_height[j];
- current_width += travel_width[j];
- current_height += travel_height[j];
-
- /* check if the fragment is in bounds */
- if ((current_width < right_edge) &&
- (current_height < bottom_edge)) {
- s->superblock_fragments[mapping_index] = current_fragment;
- debug_init(" mapping fragment %d to superblock %d, position %d (%d/%d x %d/%d)\n",
- s->superblock_fragments[mapping_index], i, j,
- current_width, right_edge, current_height, bottom_edge);
- } else {
- s->superblock_fragments[mapping_index] = -1;
- debug_init(" superblock %d, position %d has no fragment (%d/%d x %d/%d)\n",
- i, j,
- current_width, right_edge, current_height, bottom_edge);
- }
-
- mapping_index++;
- }
- }
-
- /* initialize the superblock <-> macroblock mapping; iterate through
- * all of the Y plane superblocks to build this mapping */
- right_edge = s->macroblock_width;
- bottom_edge = s->macroblock_height;
- current_width = -1;
- current_height = 0;
- superblock_row_inc = s->macroblock_width -
- (s->y_superblock_width * 2 - s->macroblock_width);;
- hilbert = hilbert_walk_mb;
- mapping_index = 0;
- current_macroblock = -1;
- for (i = 0; i < s->u_superblock_start; i++) {
-
- if (current_width >= right_edge - 1) {
- /* reset width and move to next superblock row */
- current_width = -1;
- current_height += 2;
-
- /* macroblock is now at the start of a new superblock row */
- current_macroblock += superblock_row_inc;
- }
-
- /* iterate through each potential macroblock in the superblock */
- for (j = 0; j < 4; j++) {
- current_macroblock += hilbert_walk_mb[j];
- current_width += travel_width_mb[j];
- current_height += travel_height_mb[j];
-
- /* check if the macroblock is in bounds */
- if ((current_width < right_edge) &&
- (current_height < bottom_edge)) {
- s->superblock_macroblocks[mapping_index] = current_macroblock;
- debug_init(" mapping macroblock %d to superblock %d, position %d (%d/%d x %d/%d)\n",
- s->superblock_macroblocks[mapping_index], i, j,
- current_width, right_edge, current_height, bottom_edge);
- } else {
- s->superblock_macroblocks[mapping_index] = -1;
- debug_init(" superblock %d, position %d has no macroblock (%d/%d x %d/%d)\n",
- i, j,
- current_width, right_edge, current_height, bottom_edge);
- }
-
- mapping_index++;
- }
- }
-
- /* initialize the macroblock <-> fragment mapping */
- current_fragment = 0;
- current_macroblock = 0;
- mapping_index = 0;
- for (i = 0; i < s->fragment_height; i += 2) {
-
- for (j = 0; j < s->fragment_width; j += 2) {
-
- debug_init(" macroblock %d contains fragments: ", current_macroblock);
- s->all_fragments[current_fragment].macroblock = current_macroblock;
- s->macroblock_fragments[mapping_index++] = current_fragment;
- debug_init("%d ", current_fragment);
-
- if (j + 1 < s->fragment_width) {
- s->all_fragments[current_fragment + 1].macroblock = current_macroblock;
- s->macroblock_fragments[mapping_index++] = current_fragment + 1;
- debug_init("%d ", current_fragment + 1);
- } else
- s->macroblock_fragments[mapping_index++] = -1;
-
- if (i + 1 < s->fragment_height) {
- s->all_fragments[current_fragment + s->fragment_width].macroblock =
- current_macroblock;
- s->macroblock_fragments[mapping_index++] =
- current_fragment + s->fragment_width;
- debug_init("%d ", current_fragment + s->fragment_width);
- } else
- s->macroblock_fragments[mapping_index++] = -1;
-
- if ((j + 1 < s->fragment_width) && (i + 1 < s->fragment_height)) {
- s->all_fragments[current_fragment + s->fragment_width + 1].macroblock =
- current_macroblock;
- s->macroblock_fragments[mapping_index++] =
- current_fragment + s->fragment_width + 1;
- debug_init("%d ", current_fragment + s->fragment_width + 1);
- } else
- s->macroblock_fragments[mapping_index++] = -1;
-
- /* C planes */
- c_fragment = s->fragment_start[1] +
- (i * s->fragment_width / 4) + (j / 2);
- s->all_fragments[c_fragment].macroblock = s->macroblock_count;
- s->macroblock_fragments[mapping_index++] = c_fragment;
- debug_init("%d ", c_fragment);
-
- c_fragment = s->fragment_start[2] +
- (i * s->fragment_width / 4) + (j / 2);
- s->all_fragments[c_fragment].macroblock = s->macroblock_count;
- s->macroblock_fragments[mapping_index++] = c_fragment;
- debug_init("%d ", c_fragment);
-
- debug_init("\n");
-
- if (j + 2 <= s->fragment_width)
- current_fragment += 2;
- else
- current_fragment++;
- current_macroblock++;
- }
-
- current_fragment += s->fragment_width;
- }
-
- return 0; /* successful path out */
-}
-
-/*
- * This function wipes out all of the fragment data.
- */
-static void init_frame(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i;
-
- /* zero out all of the fragment information */
- s->coded_fragment_list_index = 0;
- for (i = 0; i < s->fragment_count; i++) {
- s->all_fragments[i].coeff_count = 0;
- s->all_fragments[i].motion_x = 127;
- s->all_fragments[i].motion_y = 127;
- s->all_fragments[i].next_coeff= NULL;
- s->coeffs[i].index=
- s->coeffs[i].coeff=0;
- s->coeffs[i].next= NULL;
- }
-}
-
-/*
- * This function sets up the dequantization tables used for a particular
- * frame.
- */
-static void init_dequantizer(Vp3DecodeContext *s)
-{
- int ac_scale_factor = s->coded_ac_scale_factor[s->quality_index];
- int dc_scale_factor = s->coded_dc_scale_factor[s->quality_index];
- int i, plane, inter, qri, bmi, bmj, qistart;
-
- debug_vp3(" vp3: initializing dequantization tables\n");
-
- for(inter=0; inter<2; inter++){
- for(plane=0; plane<3; plane++){
- int sum=0;
- for(qri=0; qri<s->qr_count[inter][plane]; qri++){
- sum+= s->qr_size[inter][plane][qri];
- if(s->quality_index <= sum)
- break;
- }
- qistart= sum - s->qr_size[inter][plane][qri];
- bmi= s->qr_base[inter][plane][qri ];
- bmj= s->qr_base[inter][plane][qri+1];
- for(i=0; i<64; i++){
- int coeff= ( 2*(sum -s->quality_index)*s->base_matrix[bmi][i]
- - 2*(qistart-s->quality_index)*s->base_matrix[bmj][i]
- + s->qr_size[inter][plane][qri])
- / (2*s->qr_size[inter][plane][qri]);
-
- int qmin= 8<<(inter + !i);
- int qscale= i ? ac_scale_factor : dc_scale_factor;
-
- s->qmat[inter][plane][i]= clip((qscale * coeff)/100 * 4, qmin, 4096);
- }
- }
- }
-
- memset(s->qscale_table, (FFMAX(s->qmat[0][0][1], s->qmat[0][1][1])+8)/16, 512); //FIXME finetune
-}
-
-/*
- * This function initializes the loop filter boundary limits if the frame's
- * quality index is different from the previous frame's.
- */
-static void init_loop_filter(Vp3DecodeContext *s)
-{
- int *bounding_values= s->bounding_values_array+127;
- int filter_limit;
- int x;
-
- filter_limit = s->filter_limit_values[s->quality_index];
-
- /* set up the bounding values */
- memset(s->bounding_values_array, 0, 256 * sizeof(int));
- for (x = 0; x < filter_limit; x++) {
- bounding_values[-x - filter_limit] = -filter_limit + x;
- bounding_values[-x] = -x;
- bounding_values[x] = x;
- bounding_values[x + filter_limit] = filter_limit - x;
- }
-}
-
-/*
- * This function unpacks all of the superblock/macroblock/fragment coding
- * information from the bitstream.
- */
-static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int bit = 0;
- int current_superblock = 0;
- int current_run = 0;
- int decode_fully_flags = 0;
- int decode_partial_blocks = 0;
- int first_c_fragment_seen;
-
- int i, j;
- int current_fragment;
-
- debug_vp3(" vp3: unpacking superblock coding\n");
-
- if (s->keyframe) {
-
- debug_vp3(" keyframe-- all superblocks are fully coded\n");
- memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
-
- } else {
-
- /* unpack the list of partially-coded superblocks */
- bit = get_bits(gb, 1);
- /* toggle the bit because as soon as the first run length is
- * fetched the bit will be toggled again */
- bit ^= 1;
- while (current_superblock < s->superblock_count) {
- if (current_run-- == 0) {
- bit ^= 1;
- current_run = get_vlc2(gb,
- s->superblock_run_length_vlc.table, 6, 2);
- if (current_run == 33)
- current_run += get_bits(gb, 12);
- debug_block_coding(" setting superblocks %d..%d to %s\n",
- current_superblock,
- current_superblock + current_run - 1,
- (bit) ? "partially coded" : "not coded");
-
- /* if any of the superblocks are not partially coded, flag
- * a boolean to decode the list of fully-coded superblocks */
- if (bit == 0) {
- decode_fully_flags = 1;
- } else {
-
- /* make a note of the fact that there are partially coded
- * superblocks */
- decode_partial_blocks = 1;
- }
- }
- s->superblock_coding[current_superblock++] = bit;
- }
-
- /* unpack the list of fully coded superblocks if any of the blocks were
- * not marked as partially coded in the previous step */
- if (decode_fully_flags) {
-
- current_superblock = 0;
- current_run = 0;
- bit = get_bits(gb, 1);
- /* toggle the bit because as soon as the first run length is
- * fetched the bit will be toggled again */
- bit ^= 1;
- while (current_superblock < s->superblock_count) {
-
- /* skip any superblocks already marked as partially coded */
- if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
-
- if (current_run-- == 0) {
- bit ^= 1;
- current_run = get_vlc2(gb,
- s->superblock_run_length_vlc.table, 6, 2);
- if (current_run == 33)
- current_run += get_bits(gb, 12);
- }
-
- debug_block_coding(" setting superblock %d to %s\n",
- current_superblock,
- (bit) ? "fully coded" : "not coded");
- s->superblock_coding[current_superblock] = 2*bit;
- }
- current_superblock++;
- }
- }
-
- /* if there were partial blocks, initialize bitstream for
- * unpacking fragment codings */
- if (decode_partial_blocks) {
-
- current_run = 0;
- bit = get_bits(gb, 1);
- /* toggle the bit because as soon as the first run length is
- * fetched the bit will be toggled again */
- bit ^= 1;
- }
- }
-
- /* figure out which fragments are coded; iterate through each
- * superblock (all planes) */
- s->coded_fragment_list_index = 0;
- s->next_coeff= s->coeffs + s->fragment_count;
- s->first_coded_y_fragment = s->first_coded_c_fragment = 0;
- s->last_coded_y_fragment = s->last_coded_c_fragment = -1;
- first_c_fragment_seen = 0;
- memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
- for (i = 0; i < s->superblock_count; i++) {
-
- /* iterate through all 16 fragments in a superblock */
- for (j = 0; j < 16; j++) {
-
- /* if the fragment is in bounds, check its coding status */
- current_fragment = s->superblock_fragments[i * 16 + j];
- if (current_fragment >= s->fragment_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_superblocks(): bad fragment number (%d >= %d)\n",
- current_fragment, s->fragment_count);
- return 1;
- }
- if (current_fragment != -1) {
- if (s->superblock_coding[i] == SB_NOT_CODED) {
-
- /* copy all the fragments from the prior frame */
- s->all_fragments[current_fragment].coding_method =
- MODE_COPY;
-
- } else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
-
- /* fragment may or may not be coded; this is the case
- * that cares about the fragment coding runs */
- if (current_run-- == 0) {
- bit ^= 1;
- current_run = get_vlc2(gb,
- s->fragment_run_length_vlc.table, 5, 2);
- }
-
- if (bit) {
- /* default mode; actual mode will be decoded in
- * the next phase */
- s->all_fragments[current_fragment].coding_method =
- MODE_INTER_NO_MV;
- s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
- s->coded_fragment_list[s->coded_fragment_list_index] =
- current_fragment;
- if ((current_fragment >= s->fragment_start[1]) &&
- (s->last_coded_y_fragment == -1) &&
- (!first_c_fragment_seen)) {
- s->first_coded_c_fragment = s->coded_fragment_list_index;
- s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
- first_c_fragment_seen = 1;
- }
- s->coded_fragment_list_index++;
- s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
- debug_block_coding(" superblock %d is partially coded, fragment %d is coded\n",
- i, current_fragment);
- } else {
- /* not coded; copy this fragment from the prior frame */
- s->all_fragments[current_fragment].coding_method =
- MODE_COPY;
- debug_block_coding(" superblock %d is partially coded, fragment %d is not coded\n",
- i, current_fragment);
- }
-
- } else {
-
- /* fragments are fully coded in this superblock; actual
- * coding will be determined in next step */
- s->all_fragments[current_fragment].coding_method =
- MODE_INTER_NO_MV;
- s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
- s->coded_fragment_list[s->coded_fragment_list_index] =
- current_fragment;
- if ((current_fragment >= s->fragment_start[1]) &&
- (s->last_coded_y_fragment == -1) &&
- (!first_c_fragment_seen)) {
- s->first_coded_c_fragment = s->coded_fragment_list_index;
- s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
- first_c_fragment_seen = 1;
- }
- s->coded_fragment_list_index++;
- s->macroblock_coding[s->all_fragments[current_fragment].macroblock] = MODE_INTER_NO_MV;
- debug_block_coding(" superblock %d is fully coded, fragment %d is coded\n",
- i, current_fragment);
- }
- }
- }
- }
-
- if (!first_c_fragment_seen)
- /* only Y fragments coded in this frame */
- s->last_coded_y_fragment = s->coded_fragment_list_index - 1;
- else
- /* end the list of coded C fragments */
- s->last_coded_c_fragment = s->coded_fragment_list_index - 1;
-
- debug_block_coding(" %d total coded fragments, y: %d -> %d, c: %d -> %d\n",
- s->coded_fragment_list_index,
- s->first_coded_y_fragment,
- s->last_coded_y_fragment,
- s->first_coded_c_fragment,
- s->last_coded_c_fragment);
-
- return 0;
-}
-
-/*
- * This function unpacks all the coding mode data for individual macroblocks
- * from the bitstream.
- */
-static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i, j, k;
- int scheme;
- int current_macroblock;
- int current_fragment;
- int coding_mode;
-
- debug_vp3(" vp3: unpacking encoding modes\n");
-
- if (s->keyframe) {
- debug_vp3(" keyframe-- all blocks are coded as INTRA\n");
-
- for (i = 0; i < s->fragment_count; i++)
- s->all_fragments[i].coding_method = MODE_INTRA;
-
- } else {
-
- /* fetch the mode coding scheme for this frame */
- scheme = get_bits(gb, 3);
- debug_modes(" using mode alphabet %d\n", scheme);
-
- /* is it a custom coding scheme? */
- if (scheme == 0) {
- debug_modes(" custom mode alphabet ahead:\n");
- for (i = 0; i < 8; i++)
- ModeAlphabet[scheme][get_bits(gb, 3)] = i;
- }
-
- for (i = 0; i < 8; i++)
- debug_modes(" mode[%d][%d] = %d\n", scheme, i,
- ModeAlphabet[scheme][i]);
-
- /* iterate through all of the macroblocks that contain 1 or more
- * coded fragments */
- for (i = 0; i < s->u_superblock_start; i++) {
-
- for (j = 0; j < 4; j++) {
- current_macroblock = s->superblock_macroblocks[i * 4 + j];
- if ((current_macroblock == -1) ||
- (s->macroblock_coding[current_macroblock] == MODE_COPY))
- continue;
- if (current_macroblock >= s->macroblock_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad macroblock number (%d >= %d)\n",
- current_macroblock, s->macroblock_count);
- return 1;
- }
-
- /* mode 7 means get 3 bits for each coding mode */
- if (scheme == 7)
- coding_mode = get_bits(gb, 3);
- else
- coding_mode = ModeAlphabet[scheme]
- [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
-
- s->macroblock_coding[current_macroblock] = coding_mode;
- for (k = 0; k < 6; k++) {
- current_fragment =
- s->macroblock_fragments[current_macroblock * 6 + k];
- if (current_fragment == -1)
- continue;
- if (current_fragment >= s->fragment_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_modes(): bad fragment number (%d >= %d)\n",
- current_fragment, s->fragment_count);
- return 1;
- }
- if (s->all_fragments[current_fragment].coding_method !=
- MODE_COPY)
- s->all_fragments[current_fragment].coding_method =
- coding_mode;
- }
-
- debug_modes(" coding method for macroblock starting @ fragment %d = %d\n",
- s->macroblock_fragments[current_macroblock * 6], coding_mode);
- }
- }
- }
-
- return 0;
-}
-
-/*
- * This function unpacks all the motion vectors for the individual
- * macroblocks from the bitstream.
- */
-static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i, j, k;
- int coding_mode;
- int motion_x[6];
- int motion_y[6];
- int last_motion_x = 0;
- int last_motion_y = 0;
- int prior_last_motion_x = 0;
- int prior_last_motion_y = 0;
- int current_macroblock;
- int current_fragment;
-
- debug_vp3(" vp3: unpacking motion vectors\n");
- if (s->keyframe) {
-
- debug_vp3(" keyframe-- there are no motion vectors\n");
-
- } else {
-
- memset(motion_x, 0, 6 * sizeof(int));
- memset(motion_y, 0, 6 * sizeof(int));
-
- /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
- coding_mode = get_bits(gb, 1);
- debug_vectors(" using %s scheme for unpacking motion vectors\n",
- (coding_mode == 0) ? "VLC" : "fixed-length");
-
- /* iterate through all of the macroblocks that contain 1 or more
- * coded fragments */
- for (i = 0; i < s->u_superblock_start; i++) {
-
- for (j = 0; j < 4; j++) {
- current_macroblock = s->superblock_macroblocks[i * 4 + j];
- if ((current_macroblock == -1) ||
- (s->macroblock_coding[current_macroblock] == MODE_COPY))
- continue;
- if (current_macroblock >= s->macroblock_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad macroblock number (%d >= %d)\n",
- current_macroblock, s->macroblock_count);
- return 1;
- }
-
- current_fragment = s->macroblock_fragments[current_macroblock * 6];
- if (current_fragment >= s->fragment_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d\n",
- current_fragment, s->fragment_count);
- return 1;
- }
- switch (s->macroblock_coding[current_macroblock]) {
-
- case MODE_INTER_PLUS_MV:
- case MODE_GOLDEN_MV:
- /* all 6 fragments use the same motion vector */
- if (coding_mode == 0) {
- motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- } else {
- motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
- motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
- }
-
- for (k = 1; k < 6; k++) {
- motion_x[k] = motion_x[0];
- motion_y[k] = motion_y[0];
- }
-
- /* vector maintenance, only on MODE_INTER_PLUS_MV */
- if (s->macroblock_coding[current_macroblock] ==
- MODE_INTER_PLUS_MV) {
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
- last_motion_x = motion_x[0];
- last_motion_y = motion_y[0];
- }
- break;
-
- case MODE_INTER_FOURMV:
- /* fetch 4 vectors from the bitstream, one for each
- * Y fragment, then average for the C fragment vectors */
- motion_x[4] = motion_y[4] = 0;
- for (k = 0; k < 4; k++) {
- if (coding_mode == 0) {
- motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- } else {
- motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
- motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
- }
- motion_x[4] += motion_x[k];
- motion_y[4] += motion_y[k];
- }
-
- motion_x[5]=
- motion_x[4]= RSHIFT(motion_x[4], 2);
- motion_y[5]=
- motion_y[4]= RSHIFT(motion_y[4], 2);
-
- /* vector maintenance; vector[3] is treated as the
- * last vector in this case */
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
- last_motion_x = motion_x[3];
- last_motion_y = motion_y[3];
- break;
-
- case MODE_INTER_LAST_MV:
- /* all 6 fragments use the last motion vector */
- motion_x[0] = last_motion_x;
- motion_y[0] = last_motion_y;
- for (k = 1; k < 6; k++) {
- motion_x[k] = motion_x[0];
- motion_y[k] = motion_y[0];
- }
-
- /* no vector maintenance (last vector remains the
- * last vector) */
- break;
-
- case MODE_INTER_PRIOR_LAST:
- /* all 6 fragments use the motion vector prior to the
- * last motion vector */
- motion_x[0] = prior_last_motion_x;
- motion_y[0] = prior_last_motion_y;
- for (k = 1; k < 6; k++) {
- motion_x[k] = motion_x[0];
- motion_y[k] = motion_y[0];
- }
-
- /* vector maintenance */
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
- last_motion_x = motion_x[0];
- last_motion_y = motion_y[0];
- break;
-
- default:
- /* covers intra, inter without MV, golden without MV */
- memset(motion_x, 0, 6 * sizeof(int));
- memset(motion_y, 0, 6 * sizeof(int));
-
- /* no vector maintenance */
- break;
- }
-
- /* assign the motion vectors to the correct fragments */
- debug_vectors(" vectors for macroblock starting @ fragment %d (coding method %d):\n",
- current_fragment,
- s->macroblock_coding[current_macroblock]);
- for (k = 0; k < 6; k++) {
- current_fragment =
- s->macroblock_fragments[current_macroblock * 6 + k];
- if (current_fragment == -1)
- continue;
- if (current_fragment >= s->fragment_count) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vectors(): bad fragment number (%d >= %d)\n",
- current_fragment, s->fragment_count);
- return 1;
- }
- s->all_fragments[current_fragment].motion_x = motion_x[k];
- s->all_fragments[current_fragment].motion_y = motion_y[k];
- debug_vectors(" vector %d: fragment %d = (%d, %d)\n",
- k, current_fragment, motion_x[k], motion_y[k]);
- }
- }
- }
- }
-
- return 0;
-}
-
-/*
- * This function is called by unpack_dct_coeffs() to extract the VLCs from
- * the bitstream. The VLCs encode tokens which are used to unpack DCT
- * data. This function unpacks all the VLCs for either the Y plane or both
- * C planes, and is called for DC coefficients or different AC coefficient
- * levels (since different coefficient types require different VLC tables.
- *
- * This function returns a residual eob run. E.g, if a particular token gave
- * instructions to EOB the next 5 fragments and there were only 2 fragments
- * left in the current fragment range, 3 would be returned so that it could
- * be passed into the next call to this same function.
- */
-static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
- VLC *table, int coeff_index,
- int first_fragment, int last_fragment,
- int eob_run)
-{
- int i;
- int token;
- int zero_run = 0;
- DCTELEM coeff = 0;
- Vp3Fragment *fragment;
- uint8_t *perm= s->scantable.permutated;
- int bits_to_get;
-
- if ((first_fragment >= s->fragment_count) ||
- (last_fragment >= s->fragment_count)) {
-
- av_log(s->avctx, AV_LOG_ERROR, " vp3:unpack_vlcs(): bad fragment number (%d -> %d ?)\n",
- first_fragment, last_fragment);
- return 0;
- }
-
- for (i = first_fragment; i <= last_fragment; i++) {
-
- fragment = &s->all_fragments[s->coded_fragment_list[i]];
- if (fragment->coeff_count > coeff_index)
- continue;
-
- if (!eob_run) {
- /* decode a VLC into a token */
- token = get_vlc2(gb, table->table, 5, 3);
- debug_vlc(" token = %2d, ", token);
- /* use the token to get a zero run, a coefficient, and an eob run */
- if (token <= 6) {
- eob_run = eob_run_base[token];
- if (eob_run_get_bits[token])
- eob_run += get_bits(gb, eob_run_get_bits[token]);
- coeff = zero_run = 0;
- } else {
- bits_to_get = coeff_get_bits[token];
- if (!bits_to_get)
- coeff = coeff_tables[token][0];
- else
- coeff = coeff_tables[token][get_bits(gb, bits_to_get)];
-
- zero_run = zero_run_base[token];
- if (zero_run_get_bits[token])
- zero_run += get_bits(gb, zero_run_get_bits[token]);
- }
- }
-
- if (!eob_run) {
- fragment->coeff_count += zero_run;
- if (fragment->coeff_count < 64){
- fragment->next_coeff->coeff= coeff;
- fragment->next_coeff->index= perm[fragment->coeff_count++]; //FIXME perm here already?
- fragment->next_coeff->next= s->next_coeff;
- s->next_coeff->next=NULL;
- fragment->next_coeff= s->next_coeff++;
- }
- debug_vlc(" fragment %d coeff = %d\n",
- s->coded_fragment_list[i], fragment->next_coeff[coeff_index]);
- } else {
- fragment->coeff_count |= 128;
- debug_vlc(" fragment %d eob with %d coefficients\n",
- s->coded_fragment_list[i], fragment->coeff_count&127);
- eob_run--;
- }
- }
-
- return eob_run;
-}
-
-/*
- * This function unpacks all of the DCT coefficient data from the
- * bitstream.
- */
-static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i;
- int dc_y_table;
- int dc_c_table;
- int ac_y_table;
- int ac_c_table;
- int residual_eob_run = 0;
-
- /* fetch the DC table indices */
- dc_y_table = get_bits(gb, 4);
- dc_c_table = get_bits(gb, 4);
-
- /* unpack the Y plane DC coefficients */
- debug_vp3(" vp3: unpacking Y plane DC coefficients using table %d\n",
- dc_y_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
- s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
-
- /* unpack the C plane DC coefficients */
- debug_vp3(" vp3: unpacking C plane DC coefficients using table %d\n",
- dc_c_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
- s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
-
- /* fetch the AC table indices */
- ac_y_table = get_bits(gb, 4);
- ac_c_table = get_bits(gb, 4);
-
- /* unpack the group 1 AC coefficients (coeffs 1-5) */
- for (i = 1; i <= 5; i++) {
-
- debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
- i, ac_y_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_y_table], i,
- s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
-
- debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
- i, ac_c_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_1[ac_c_table], i,
- s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
- }
-
- /* unpack the group 2 AC coefficients (coeffs 6-14) */
- for (i = 6; i <= 14; i++) {
-
- debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
- i, ac_y_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_y_table], i,
- s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
-
- debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
- i, ac_c_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_2[ac_c_table], i,
- s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
- }
-
- /* unpack the group 3 AC coefficients (coeffs 15-27) */
- for (i = 15; i <= 27; i++) {
-
- debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
- i, ac_y_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_y_table], i,
- s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
-
- debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
- i, ac_c_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_3[ac_c_table], i,
- s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
- }
-
- /* unpack the group 4 AC coefficients (coeffs 28-63) */
- for (i = 28; i <= 63; i++) {
-
- debug_vp3(" vp3: unpacking level %d Y plane AC coefficients using table %d\n",
- i, ac_y_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_y_table], i,
- s->first_coded_y_fragment, s->last_coded_y_fragment, residual_eob_run);
-
- debug_vp3(" vp3: unpacking level %d C plane AC coefficients using table %d\n",
- i, ac_c_table);
- residual_eob_run = unpack_vlcs(s, gb, &s->ac_vlc_4[ac_c_table], i,
- s->first_coded_c_fragment, s->last_coded_c_fragment, residual_eob_run);
- }
-
- return 0;
-}
-
-/*
- * This function reverses the DC prediction for each coded fragment in
- * the frame. Much of this function is adapted directly from the original
- * VP3 source code.
- */
-#define COMPATIBLE_FRAME(x) \
- (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
-#define FRAME_CODED(x) (s->all_fragments[x].coding_method != MODE_COPY)
-#define DC_COEFF(u) (s->coeffs[u].index ? 0 : s->coeffs[u].coeff) //FIXME do somethin to simplify this
-
-static void reverse_dc_prediction(Vp3DecodeContext *s,
- int first_fragment,
- int fragment_width,
- int fragment_height)
-{
-
-#define PUL 8
-#define PU 4
-#define PUR 2
-#define PL 1
-
- int x, y;
- int i = first_fragment;
-
- int predicted_dc;
-
- /* DC values for the left, up-left, up, and up-right fragments */
- int vl, vul, vu, vur;
-
- /* indices for the left, up-left, up, and up-right fragments */
- int l, ul, u, ur;
-
- /*
- * The 6 fields mean:
- * 0: up-left multiplier
- * 1: up multiplier
- * 2: up-right multiplier
- * 3: left multiplier
- */
- int predictor_transform[16][4] = {
- { 0, 0, 0, 0},
- { 0, 0, 0,128}, // PL
- { 0, 0,128, 0}, // PUR
- { 0, 0, 53, 75}, // PUR|PL
- { 0,128, 0, 0}, // PU
- { 0, 64, 0, 64}, // PU|PL
- { 0,128, 0, 0}, // PU|PUR
- { 0, 0, 53, 75}, // PU|PUR|PL
- {128, 0, 0, 0}, // PUL
- { 0, 0, 0,128}, // PUL|PL
- { 64, 0, 64, 0}, // PUL|PUR
- { 0, 0, 53, 75}, // PUL|PUR|PL
- { 0,128, 0, 0}, // PUL|PU
- {-104,116, 0,116}, // PUL|PU|PL
- { 24, 80, 24, 0}, // PUL|PU|PUR
- {-104,116, 0,116} // PUL|PU|PUR|PL
- };
-
- /* This table shows which types of blocks can use other blocks for
- * prediction. For example, INTRA is the only mode in this table to
- * have a frame number of 0. That means INTRA blocks can only predict
- * from other INTRA blocks. There are 2 golden frame coding types;
- * blocks encoding in these modes can only predict from other blocks
- * that were encoded with these 1 of these 2 modes. */
- unsigned char compatible_frame[8] = {
- 1, /* MODE_INTER_NO_MV */
- 0, /* MODE_INTRA */
- 1, /* MODE_INTER_PLUS_MV */
- 1, /* MODE_INTER_LAST_MV */
- 1, /* MODE_INTER_PRIOR_MV */
- 2, /* MODE_USING_GOLDEN */
- 2, /* MODE_GOLDEN_MV */
- 1 /* MODE_INTER_FOUR_MV */
- };
- int current_frame_type;
-
- /* there is a last DC predictor for each of the 3 frame types */
- short last_dc[3];
-
- int transform = 0;
-
- debug_vp3(" vp3: reversing DC prediction\n");
-
- vul = vu = vur = vl = 0;
- last_dc[0] = last_dc[1] = last_dc[2] = 0;
-
- /* for each fragment row... */
- for (y = 0; y < fragment_height; y++) {
-
- /* for each fragment in a row... */
- for (x = 0; x < fragment_width; x++, i++) {
-
- /* reverse prediction if this block was coded */
- if (s->all_fragments[i].coding_method != MODE_COPY) {
-
- current_frame_type =
- compatible_frame[s->all_fragments[i].coding_method];
- debug_dc_pred(" frag %d: orig DC = %d, ",
- i, DC_COEFF(i));
-
- transform= 0;
- if(x){
- l= i-1;
- vl = DC_COEFF(l);
- if(FRAME_CODED(l) && COMPATIBLE_FRAME(l))
- transform |= PL;
- }
- if(y){
- u= i-fragment_width;
- vu = DC_COEFF(u);
- if(FRAME_CODED(u) && COMPATIBLE_FRAME(u))
- transform |= PU;
- if(x){
- ul= i-fragment_width-1;
- vul = DC_COEFF(ul);
- if(FRAME_CODED(ul) && COMPATIBLE_FRAME(ul))
- transform |= PUL;
- }
- if(x + 1 < fragment_width){
- ur= i-fragment_width+1;
- vur = DC_COEFF(ur);
- if(FRAME_CODED(ur) && COMPATIBLE_FRAME(ur))
- transform |= PUR;
- }
- }
-
- debug_dc_pred("transform = %d, ", transform);
-
- if (transform == 0) {
-
- /* if there were no fragments to predict from, use last
- * DC saved */
- predicted_dc = last_dc[current_frame_type];
- debug_dc_pred("from last DC (%d) = %d\n",
- current_frame_type, DC_COEFF(i));
-
- } else {
-
- /* apply the appropriate predictor transform */
- predicted_dc =
- (predictor_transform[transform][0] * vul) +
- (predictor_transform[transform][1] * vu) +
- (predictor_transform[transform][2] * vur) +
- (predictor_transform[transform][3] * vl);
-
- predicted_dc /= 128;
-
- /* check for outranging on the [ul u l] and
- * [ul u ur l] predictors */
- if ((transform == 13) || (transform == 15)) {
- if (FFABS(predicted_dc - vu) > 128)
- predicted_dc = vu;
- else if (FFABS(predicted_dc - vl) > 128)
- predicted_dc = vl;
- else if (FFABS(predicted_dc - vul) > 128)
- predicted_dc = vul;
- }
-
- debug_dc_pred("from pred DC = %d\n",
- DC_COEFF(i));
- }
-
- /* at long last, apply the predictor */
- if(s->coeffs[i].index){
- *s->next_coeff= s->coeffs[i];
- s->coeffs[i].index=0;
- s->coeffs[i].coeff=0;
- s->coeffs[i].next= s->next_coeff++;
- }
- s->coeffs[i].coeff += predicted_dc;
- /* save the DC */
- last_dc[current_frame_type] = DC_COEFF(i);
- if(DC_COEFF(i) && !(s->all_fragments[i].coeff_count&127)){
- s->all_fragments[i].coeff_count= 129;
-// s->all_fragments[i].next_coeff= s->next_coeff;
- s->coeffs[i].next= s->next_coeff;
- (s->next_coeff++)->next=NULL;
- }
- }
- }
- }
-}
-
-
-static void horizontal_filter(unsigned char *first_pixel, int stride,
- int *bounding_values);
-static void vertical_filter(unsigned char *first_pixel, int stride,
- int *bounding_values);
-
-/*
- * Perform the final rendering for a particular slice of data.
- * The slice number ranges from 0..(macroblock_height - 1).
- */
-static void render_slice(Vp3DecodeContext *s, int slice)
-{
- int x;
- int m, n;
- int16_t *dequantizer;
- DECLARE_ALIGNED_16(DCTELEM, block[64]);
- int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
- int motion_halfpel_index;
- uint8_t *motion_source;
- int plane;
- int current_macroblock_entry = slice * s->macroblock_width * 6;
-
- if (slice >= s->macroblock_height)
- return;
-
- for (plane = 0; plane < 3; plane++) {
- uint8_t *output_plane = s->current_frame.data [plane];
- uint8_t * last_plane = s-> last_frame.data [plane];
- uint8_t *golden_plane = s-> golden_frame.data [plane];
- int stride = s->current_frame.linesize[plane];
- int plane_width = s->width >> !!plane;
- int plane_height = s->height >> !!plane;
- int y = slice * FRAGMENT_PIXELS << !plane ;
- int slice_height = y + (FRAGMENT_PIXELS << !plane);
- int i = s->macroblock_fragments[current_macroblock_entry + plane + 3*!!plane];
-
- if (!s->flipped_image) stride = -stride;
-
-
- if(FFABS(stride) > 2048)
- return; //various tables are fixed size
-
- /* for each fragment row in the slice (both of them)... */
- for (; y < slice_height; y += 8) {
-
- /* for each fragment in a row... */
- for (x = 0; x < plane_width; x += 8, i++) {
-
- if ((i < 0) || (i >= s->fragment_count)) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:render_slice(): bad fragment number (%d)\n", i);
- return;
- }
-
- /* transform if this block was coded */
- if ((s->all_fragments[i].coding_method != MODE_COPY) &&
- !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
-
- if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
- (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
- motion_source= golden_plane;
- else
- motion_source= last_plane;
-
- motion_source += s->all_fragments[i].first_pixel;
- motion_halfpel_index = 0;
-
- /* sort out the motion vector if this fragment is coded
- * using a motion vector method */
- if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
- (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
- int src_x, src_y;
- motion_x = s->all_fragments[i].motion_x;
- motion_y = s->all_fragments[i].motion_y;
- if(plane){
- motion_x= (motion_x>>1) | (motion_x&1);
- motion_y= (motion_y>>1) | (motion_y&1);
- }
-
- src_x= (motion_x>>1) + x;
- src_y= (motion_y>>1) + y;
- if ((motion_x == 127) || (motion_y == 127))
- av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
-
- motion_halfpel_index = motion_x & 0x01;
- motion_source += (motion_x >> 1);
-
- motion_halfpel_index |= (motion_y & 0x01) << 1;
- motion_source += ((motion_y >> 1) * stride);
-
- if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
- uint8_t *temp= s->edge_emu_buffer;
- if(stride<0) temp -= 9*stride;
- else temp += 9*stride;
-
- ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
- motion_source= temp;
- }
- }
-
-
- /* first, take care of copying a block from either the
- * previous or the golden frame */
- if (s->all_fragments[i].coding_method != MODE_INTRA) {
- /* Note, it is possible to implement all MC cases with
- put_no_rnd_pixels_l2 which would look more like the
- VP3 source but this would be slower as
- put_no_rnd_pixels_tab is better optimzed */
- if(motion_halfpel_index != 3){
- s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
- output_plane + s->all_fragments[i].first_pixel,
- motion_source, stride, 8);
- }else{
- int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
- s->dsp.put_no_rnd_pixels_l2[1](
- output_plane + s->all_fragments[i].first_pixel,
- motion_source - d,
- motion_source + stride + 1 + d,
- stride, 8);
- }
- dequantizer = s->qmat[1][plane];
- }else{
- dequantizer = s->qmat[0][plane];
- }
-
- /* dequantize the DCT coefficients */
- debug_idct("fragment %d, coding mode %d, DC = %d, dequant = %d:\n",
- i, s->all_fragments[i].coding_method,
- DC_COEFF(i), dequantizer[0]);
-
- if(s->avctx->idct_algo==FF_IDCT_VP3){
- Coeff *coeff= s->coeffs + i;
- memset(block, 0, sizeof(block));
- while(coeff->next){
- block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
- coeff= coeff->next;
- }
- }else{
- Coeff *coeff= s->coeffs + i;
- memset(block, 0, sizeof(block));
- while(coeff->next){
- block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
- coeff= coeff->next;
- }
- }
-
- /* invert DCT and place (or add) in final output */
-
- if (s->all_fragments[i].coding_method == MODE_INTRA) {
- if(s->avctx->idct_algo!=FF_IDCT_VP3)
- block[0] += 128<<3;
- s->dsp.idct_put(
- output_plane + s->all_fragments[i].first_pixel,
- stride,
- block);
- } else {
- s->dsp.idct_add(
- output_plane + s->all_fragments[i].first_pixel,
- stride,
- block);
- }
-
- debug_idct("block after idct_%s():\n",
- (s->all_fragments[i].coding_method == MODE_INTRA)?
- "put" : "add");
- for (m = 0; m < 8; m++) {
- for (n = 0; n < 8; n++) {
- debug_idct(" %3d", *(output_plane +
- s->all_fragments[i].first_pixel + (m * stride + n)));
- }
- debug_idct("\n");
- }
- debug_idct("\n");
-
- } else {
-
- /* copy directly from the previous frame */
- s->dsp.put_pixels_tab[1][0](
- output_plane + s->all_fragments[i].first_pixel,
- last_plane + s->all_fragments[i].first_pixel,
- stride, 8);
-
- }
-#if 0
- /* perform the left edge filter if:
- * - the fragment is not on the left column
- * - the fragment is coded in this frame
- * - the fragment is not coded in this frame but the left
- * fragment is coded in this frame (this is done instead
- * of a right edge filter when rendering the left fragment
- * since this fragment is not available yet) */
- if ((x > 0) &&
- ((s->all_fragments[i].coding_method != MODE_COPY) ||
- ((s->all_fragments[i].coding_method == MODE_COPY) &&
- (s->all_fragments[i - 1].coding_method != MODE_COPY)) )) {
- horizontal_filter(
- output_plane + s->all_fragments[i].first_pixel + 7*stride,
- -stride, s->bounding_values_array + 127);
- }
-
- /* perform the top edge filter if:
- * - the fragment is not on the top row
- * - the fragment is coded in this frame
- * - the fragment is not coded in this frame but the above
- * fragment is coded in this frame (this is done instead
- * of a bottom edge filter when rendering the above
- * fragment since this fragment is not available yet) */
- if ((y > 0) &&
- ((s->all_fragments[i].coding_method != MODE_COPY) ||
- ((s->all_fragments[i].coding_method == MODE_COPY) &&
- (s->all_fragments[i - fragment_width].coding_method != MODE_COPY)) )) {
- vertical_filter(
- output_plane + s->all_fragments[i].first_pixel - stride,
- -stride, s->bounding_values_array + 127);
- }
-#endif
- }
- }
- }
-
- /* this looks like a good place for slice dispatch... */
- /* algorithm:
- * if (slice == s->macroblock_height - 1)
- * dispatch (both last slice & 2nd-to-last slice);
- * else if (slice > 0)
- * dispatch (slice - 1);
- */
-
- emms_c();
-}
-
-static void horizontal_filter(unsigned char *first_pixel, int stride,
- int *bounding_values)
-{
- unsigned char *end;
- int filter_value;
-
- for (end= first_pixel + 8*stride; first_pixel != end; first_pixel += stride) {
- filter_value =
- (first_pixel[-2] - first_pixel[ 1])
- +3*(first_pixel[ 0] - first_pixel[-1]);
- filter_value = bounding_values[(filter_value + 4) >> 3];
- first_pixel[-1] = clip_uint8(first_pixel[-1] + filter_value);
- first_pixel[ 0] = clip_uint8(first_pixel[ 0] - filter_value);
- }
-}
-
-static void vertical_filter(unsigned char *first_pixel, int stride,
- int *bounding_values)
-{
- unsigned char *end;
- int filter_value;
- const int nstride= -stride;
-
- for (end= first_pixel + 8; first_pixel < end; first_pixel++) {
- filter_value =
- (first_pixel[2 * nstride] - first_pixel[ stride])
- +3*(first_pixel[0 ] - first_pixel[nstride]);
- filter_value = bounding_values[(filter_value + 4) >> 3];
- first_pixel[nstride] = clip_uint8(first_pixel[nstride] + filter_value);
- first_pixel[0] = clip_uint8(first_pixel[0] - filter_value);
- }
-}
-
-static void apply_loop_filter(Vp3DecodeContext *s)
-{
- int plane;
- int x, y;
- int *bounding_values= s->bounding_values_array+127;
-
-#if 0
- int bounding_values_array[256];
- int filter_limit;
-
- /* find the right loop limit value */
- for (x = 63; x >= 0; x--) {
- if (vp31_ac_scale_factor[x] >= s->quality_index)
- break;
- }
- filter_limit = vp31_filter_limit_values[s->quality_index];
-
- /* set up the bounding values */
- memset(bounding_values_array, 0, 256 * sizeof(int));
- for (x = 0; x < filter_limit; x++) {
- bounding_values[-x - filter_limit] = -filter_limit + x;
- bounding_values[-x] = -x;
- bounding_values[x] = x;
- bounding_values[x + filter_limit] = filter_limit - x;
- }
-#endif
-
- for (plane = 0; plane < 3; plane++) {
- int width = s->fragment_width >> !!plane;
- int height = s->fragment_height >> !!plane;
- int fragment = s->fragment_start [plane];
- int stride = s->current_frame.linesize[plane];
- uint8_t *plane_data = s->current_frame.data [plane];
- if (!s->flipped_image) stride = -stride;
-
- for (y = 0; y < height; y++) {
-
- for (x = 0; x < width; x++) {
-START_TIMER
- /* do not perform left edge filter for left columns frags */
- if ((x > 0) &&
- (s->all_fragments[fragment].coding_method != MODE_COPY)) {
- horizontal_filter(
- plane_data + s->all_fragments[fragment].first_pixel,
- stride, bounding_values);
- }
-
- /* do not perform top edge filter for top row fragments */
- if ((y > 0) &&
- (s->all_fragments[fragment].coding_method != MODE_COPY)) {
- vertical_filter(
- plane_data + s->all_fragments[fragment].first_pixel,
- stride, bounding_values);
- }
-
- /* do not perform right edge filter for right column
- * fragments or if right fragment neighbor is also coded
- * in this frame (it will be filtered in next iteration) */
- if ((x < width - 1) &&
- (s->all_fragments[fragment].coding_method != MODE_COPY) &&
- (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
- horizontal_filter(
- plane_data + s->all_fragments[fragment + 1].first_pixel,
- stride, bounding_values);
- }
-
- /* do not perform bottom edge filter for bottom row
- * fragments or if bottom fragment neighbor is also coded
- * in this frame (it will be filtered in the next row) */
- if ((y < height - 1) &&
- (s->all_fragments[fragment].coding_method != MODE_COPY) &&
- (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
- vertical_filter(
- plane_data + s->all_fragments[fragment + width].first_pixel,
- stride, bounding_values);
- }
-
- fragment++;
-STOP_TIMER("loop filter")
- }
- }
- }
-}
-
-/*
- * This function computes the first pixel addresses for each fragment.
- * This function needs to be invoked after the first frame is allocated
- * so that it has access to the plane strides.
- */
-static void vp3_calculate_pixel_addresses(Vp3DecodeContext *s)
-{
-
- int i, x, y;
-
- /* figure out the first pixel addresses for each of the fragments */
- /* Y plane */
- i = 0;
- for (y = s->fragment_height; y > 0; y--) {
- for (x = 0; x < s->fragment_width; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[0] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-
- /* U plane */
- i = s->fragment_start[1];
- for (y = s->fragment_height / 2; y > 0; y--) {
- for (x = 0; x < s->fragment_width / 2; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[1] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-
- /* V plane */
- i = s->fragment_start[2];
- for (y = s->fragment_height / 2; y > 0; y--) {
- for (x = 0; x < s->fragment_width / 2; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[2] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-}
-
-/* FIXME: this should be merged with the above! */
-static void theora_calculate_pixel_addresses(Vp3DecodeContext *s)
-{
-
- int i, x, y;
-
- /* figure out the first pixel addresses for each of the fragments */
- /* Y plane */
- i = 0;
- for (y = 1; y <= s->fragment_height; y++) {
- for (x = 0; x < s->fragment_width; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[0] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[0] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-
- /* U plane */
- i = s->fragment_start[1];
- for (y = 1; y <= s->fragment_height / 2; y++) {
- for (x = 0; x < s->fragment_width / 2; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[1] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[1] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-
- /* V plane */
- i = s->fragment_start[2];
- for (y = 1; y <= s->fragment_height / 2; y++) {
- for (x = 0; x < s->fragment_width / 2; x++) {
- s->all_fragments[i++].first_pixel =
- s->golden_frame.linesize[2] * y * FRAGMENT_PIXELS -
- s->golden_frame.linesize[2] +
- x * FRAGMENT_PIXELS;
- debug_init(" fragment %d, first pixel @ %d\n",
- i-1, s->all_fragments[i-1].first_pixel);
- }
- }
-}
-
-/*
- * This is the ffmpeg/libavcodec API init function.
- */
-static int vp3_decode_init(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int i, inter, plane;
- int c_width;
- int c_height;
- int y_superblock_count;
- int c_superblock_count;
-
- if (avctx->codec_tag == MKTAG('V','P','3','0'))
- s->version = 0;
- else
- s->version = 1;
-
- s->avctx = avctx;
- s->width = (avctx->width + 15) & 0xFFFFFFF0;
- s->height = (avctx->height + 15) & 0xFFFFFFF0;
- avctx->pix_fmt = PIX_FMT_YUV420P;
- avctx->has_b_frames = 0;
- if(avctx->idct_algo==FF_IDCT_AUTO)
- avctx->idct_algo=FF_IDCT_VP3;
- dsputil_init(&s->dsp, avctx);
-
- ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
-
- /* initialize to an impossible value which will force a recalculation
- * in the first frame decode */
- s->quality_index = -1;
-
- s->y_superblock_width = (s->width + 31) / 32;
- s->y_superblock_height = (s->height + 31) / 32;
- y_superblock_count = s->y_superblock_width * s->y_superblock_height;
-
- /* work out the dimensions for the C planes */
- c_width = s->width / 2;
- c_height = s->height / 2;
- s->c_superblock_width = (c_width + 31) / 32;
- s->c_superblock_height = (c_height + 31) / 32;
- c_superblock_count = s->c_superblock_width * s->c_superblock_height;
-
- s->superblock_count = y_superblock_count + (c_superblock_count * 2);
- s->u_superblock_start = y_superblock_count;
- s->v_superblock_start = s->u_superblock_start + c_superblock_count;
- s->superblock_coding = av_malloc(s->superblock_count);
-
- s->macroblock_width = (s->width + 15) / 16;
- s->macroblock_height = (s->height + 15) / 16;
- s->macroblock_count = s->macroblock_width * s->macroblock_height;
-
- s->fragment_width = s->width / FRAGMENT_PIXELS;
- s->fragment_height = s->height / FRAGMENT_PIXELS;
-
- /* fragment count covers all 8x8 blocks for all 3 planes */
- s->fragment_count = s->fragment_width * s->fragment_height * 3 / 2;
- s->fragment_start[1] = s->fragment_width * s->fragment_height;
- s->fragment_start[2] = s->fragment_width * s->fragment_height * 5 / 4;
-
- debug_init(" Y plane: %d x %d\n", s->width, s->height);
- debug_init(" C plane: %d x %d\n", c_width, c_height);
- debug_init(" Y superblocks: %d x %d, %d total\n",
- s->y_superblock_width, s->y_superblock_height, y_superblock_count);
- debug_init(" C superblocks: %d x %d, %d total\n",
- s->c_superblock_width, s->c_superblock_height, c_superblock_count);
- debug_init(" total superblocks = %d, U starts @ %d, V starts @ %d\n",
- s->superblock_count, s->u_superblock_start, s->v_superblock_start);
- debug_init(" macroblocks: %d x %d, %d total\n",
- s->macroblock_width, s->macroblock_height, s->macroblock_count);
- debug_init(" %d fragments, %d x %d, u starts @ %d, v starts @ %d\n",
- s->fragment_count,
- s->fragment_width,
- s->fragment_height,
- s->fragment_start[1],
- s->fragment_start[2]);
-
- s->all_fragments = av_malloc(s->fragment_count * sizeof(Vp3Fragment));
- s->coeffs = av_malloc(s->fragment_count * sizeof(Coeff) * 65);
- s->coded_fragment_list = av_malloc(s->fragment_count * sizeof(int));
- s->pixel_addresses_inited = 0;
-
- if (!s->theora_tables)
- {
- for (i = 0; i < 64; i++) {
- s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
- s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
- s->base_matrix[0][i] = vp31_intra_y_dequant[i];
- s->base_matrix[1][i] = vp31_intra_c_dequant[i];
- s->base_matrix[2][i] = vp31_inter_dequant[i];
- s->filter_limit_values[i] = vp31_filter_limit_values[i];
- }
-
- for(inter=0; inter<2; inter++){
- for(plane=0; plane<3; plane++){
- s->qr_count[inter][plane]= 1;
- s->qr_size [inter][plane][0]= 63;
- s->qr_base [inter][plane][0]=
- s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
- }
- }
-
- /* init VLC tables */
- for (i = 0; i < 16; i++) {
-
- /* DC histograms */
- init_vlc(&s->dc_vlc[i], 5, 32,
- &dc_bias[i][0][1], 4, 2,
- &dc_bias[i][0][0], 4, 2, 0);
-
- /* group 1 AC histograms */
- init_vlc(&s->ac_vlc_1[i], 5, 32,
- &ac_bias_0[i][0][1], 4, 2,
- &ac_bias_0[i][0][0], 4, 2, 0);
-
- /* group 2 AC histograms */
- init_vlc(&s->ac_vlc_2[i], 5, 32,
- &ac_bias_1[i][0][1], 4, 2,
- &ac_bias_1[i][0][0], 4, 2, 0);
-
- /* group 3 AC histograms */
- init_vlc(&s->ac_vlc_3[i], 5, 32,
- &ac_bias_2[i][0][1], 4, 2,
- &ac_bias_2[i][0][0], 4, 2, 0);
-
- /* group 4 AC histograms */
- init_vlc(&s->ac_vlc_4[i], 5, 32,
- &ac_bias_3[i][0][1], 4, 2,
- &ac_bias_3[i][0][0], 4, 2, 0);
- }
- } else {
- for (i = 0; i < 16; i++) {
-
- /* DC histograms */
- init_vlc(&s->dc_vlc[i], 5, 32,
- &s->huffman_table[i][0][1], 4, 2,
- &s->huffman_table[i][0][0], 4, 2, 0);
-
- /* group 1 AC histograms */
- init_vlc(&s->ac_vlc_1[i], 5, 32,
- &s->huffman_table[i+16][0][1], 4, 2,
- &s->huffman_table[i+16][0][0], 4, 2, 0);
-
- /* group 2 AC histograms */
- init_vlc(&s->ac_vlc_2[i], 5, 32,
- &s->huffman_table[i+16*2][0][1], 4, 2,
- &s->huffman_table[i+16*2][0][0], 4, 2, 0);
-
- /* group 3 AC histograms */
- init_vlc(&s->ac_vlc_3[i], 5, 32,
- &s->huffman_table[i+16*3][0][1], 4, 2,
- &s->huffman_table[i+16*3][0][0], 4, 2, 0);
-
- /* group 4 AC histograms */
- init_vlc(&s->ac_vlc_4[i], 5, 32,
- &s->huffman_table[i+16*4][0][1], 4, 2,
- &s->huffman_table[i+16*4][0][0], 4, 2, 0);
- }
- }
-
- init_vlc(&s->superblock_run_length_vlc, 6, 34,
- &superblock_run_length_vlc_table[0][1], 4, 2,
- &superblock_run_length_vlc_table[0][0], 4, 2, 0);
-
- init_vlc(&s->fragment_run_length_vlc, 5, 30,
- &fragment_run_length_vlc_table[0][1], 4, 2,
- &fragment_run_length_vlc_table[0][0], 4, 2, 0);
-
- init_vlc(&s->mode_code_vlc, 3, 8,
- &mode_code_vlc_table[0][1], 2, 1,
- &mode_code_vlc_table[0][0], 2, 1, 0);
-
- init_vlc(&s->motion_vector_vlc, 6, 63,
- &motion_vector_vlc_table[0][1], 2, 1,
- &motion_vector_vlc_table[0][0], 2, 1, 0);
-
- /* work out the block mapping tables */
- s->superblock_fragments = av_malloc(s->superblock_count * 16 * sizeof(int));
- s->superblock_macroblocks = av_malloc(s->superblock_count * 4 * sizeof(int));
- s->macroblock_fragments = av_malloc(s->macroblock_count * 6 * sizeof(int));
- s->macroblock_coding = av_malloc(s->macroblock_count + 1);
- init_block_mapping(s);
-
- for (i = 0; i < 3; i++) {
- s->current_frame.data[i] = NULL;
- s->last_frame.data[i] = NULL;
- s->golden_frame.data[i] = NULL;
- }
-
- return 0;
-}
-
-/*
- * This is the ffmpeg/libavcodec API frame decode function.
- */
-static int vp3_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- GetBitContext gb;
- static int counter = 0;
- int i;
-
- init_get_bits(&gb, buf, buf_size * 8);
-
- if (s->theora && get_bits1(&gb))
- {
-#if 1
- av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
- return -1;
-#else
- int ptype = get_bits(&gb, 7);
-
- skip_bits(&gb, 6*8); /* "theora" */
-
- switch(ptype)
- {
- case 1:
- theora_decode_comments(avctx, &gb);
- break;
- case 2:
- theora_decode_tables(avctx, &gb);
- init_dequantizer(s);
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype);
- }
- return buf_size;
-#endif
- }
-
- s->keyframe = !get_bits1(&gb);
- if (!s->theora)
- skip_bits(&gb, 1);
- s->last_quality_index = s->quality_index;
-
- s->nqis=0;
- do{
- s->qis[s->nqis++]= get_bits(&gb, 6);
- } while(s->theora >= 0x030200 && s->nqis<3 && get_bits1(&gb));
-
- s->quality_index= s->qis[0];
-
- if (s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
- s->keyframe?"key":"", counter, s->quality_index);
- counter++;
-
- if (s->quality_index != s->last_quality_index) {
- init_dequantizer(s);
- init_loop_filter(s);
- }
-
- if (s->keyframe) {
- if (!s->theora)
- {
- skip_bits(&gb, 4); /* width code */
- skip_bits(&gb, 4); /* height code */
- if (s->version)
- {
- s->version = get_bits(&gb, 5);
- if (counter == 1)
- av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
- }
- }
- if (s->version || s->theora)
- {
- if (get_bits1(&gb))
- av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
- skip_bits(&gb, 2); /* reserved? */
- }
-
- if (s->last_frame.data[0] == s->golden_frame.data[0]) {
- if (s->golden_frame.data[0])
- avctx->release_buffer(avctx, &s->golden_frame);
- s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */
- } else {
- if (s->golden_frame.data[0])
- avctx->release_buffer(avctx, &s->golden_frame);
- if (s->last_frame.data[0])
- avctx->release_buffer(avctx, &s->last_frame);
- }
-
- s->golden_frame.reference = 3;
- if(avctx->get_buffer(avctx, &s->golden_frame) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
- return -1;
- }
-
- /* golden frame is also the current frame */
- s->current_frame= s->golden_frame;
-
- /* time to figure out pixel addresses? */
- if (!s->pixel_addresses_inited)
- {
- if (!s->flipped_image)
- vp3_calculate_pixel_addresses(s);
- else
- theora_calculate_pixel_addresses(s);
- s->pixel_addresses_inited = 1;
- }
- } else {
- /* allocate a new current frame */
- s->current_frame.reference = 3;
- if (!s->pixel_addresses_inited) {
- av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n");
- return -1;
- }
- if(avctx->get_buffer(avctx, &s->current_frame) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n");
- return -1;
- }
- }
-
- s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame
- s->current_frame.qstride= 0;
-
- {START_TIMER
- init_frame(s, &gb);
- STOP_TIMER("init_frame")}
-
-#if KEYFRAMES_ONLY
-if (!s->keyframe) {
-
- memcpy(s->current_frame.data[0], s->golden_frame.data[0],
- s->current_frame.linesize[0] * s->height);
- memcpy(s->current_frame.data[1], s->golden_frame.data[1],
- s->current_frame.linesize[1] * s->height / 2);
- memcpy(s->current_frame.data[2], s->golden_frame.data[2],
- s->current_frame.linesize[2] * s->height / 2);
-
-} else {
-#endif
-
- {START_TIMER
- if (unpack_superblocks(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
- return -1;
- }
- STOP_TIMER("unpack_superblocks")}
- {START_TIMER
- if (unpack_modes(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
- return -1;
- }
- STOP_TIMER("unpack_modes")}
- {START_TIMER
- if (unpack_vectors(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
- return -1;
- }
- STOP_TIMER("unpack_vectors")}
- {START_TIMER
- if (unpack_dct_coeffs(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
- return -1;
- }
- STOP_TIMER("unpack_dct_coeffs")}
- {START_TIMER
-
- reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height);
- if ((avctx->flags & CODEC_FLAG_GRAY) == 0) {
- reverse_dc_prediction(s, s->fragment_start[1],
- s->fragment_width / 2, s->fragment_height / 2);
- reverse_dc_prediction(s, s->fragment_start[2],
- s->fragment_width / 2, s->fragment_height / 2);
- }
- STOP_TIMER("reverse_dc_prediction")}
- {START_TIMER
-
- for (i = 0; i < s->macroblock_height; i++)
- render_slice(s, i);
- STOP_TIMER("render_fragments")}
-
- {START_TIMER
- apply_loop_filter(s);
- STOP_TIMER("apply_loop_filter")}
-#if KEYFRAMES_ONLY
-}
-#endif
-
- *data_size=sizeof(AVFrame);
- *(AVFrame*)data= s->current_frame;
-
- /* release the last frame, if it is allocated and if it is not the
- * golden frame */
- if ((s->last_frame.data[0]) &&
- (s->last_frame.data[0] != s->golden_frame.data[0]))
- avctx->release_buffer(avctx, &s->last_frame);
-
- /* shuffle frames (last = current) */
- s->last_frame= s->current_frame;
- s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */
-
- return buf_size;
-}
-
-/*
- * This is the ffmpeg/libavcodec API module cleanup function.
- */
-static int vp3_decode_end(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- av_free(s->all_fragments);
- av_free(s->coeffs);
- av_free(s->coded_fragment_list);
- av_free(s->superblock_fragments);
- av_free(s->superblock_macroblocks);
- av_free(s->macroblock_fragments);
- av_free(s->macroblock_coding);
-
- /* release all frames */
- if (s->golden_frame.data[0] && s->golden_frame.data[0] != s->last_frame.data[0])
- avctx->release_buffer(avctx, &s->golden_frame);
- if (s->last_frame.data[0])
- avctx->release_buffer(avctx, &s->last_frame);
- /* no need to release the current_frame since it will always be pointing
- * to the same frame as either the golden or last frame */
-
- return 0;
-}
-
-static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- if (get_bits(gb, 1)) {
- int token;
- if (s->entries >= 32) { /* overflow */
- av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
- return -1;
- }
- token = get_bits(gb, 5);
- //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);
- s->huffman_table[s->hti][token][0] = s->hbits;
- s->huffman_table[s->hti][token][1] = s->huff_code_size;
- s->entries++;
- }
- else {
- if (s->huff_code_size >= 32) {/* overflow */
- av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
- return -1;
- }
- s->huff_code_size++;
- s->hbits <<= 1;
- read_huffman_tree(avctx, gb);
- s->hbits |= 1;
- read_huffman_tree(avctx, gb);
- s->hbits >>= 1;
- s->huff_code_size--;
- }
- return 0;
-}
-
-static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- s->theora = get_bits_long(gb, 24);
- av_log(avctx, AV_LOG_INFO, "Theora bitstream version %X\n", s->theora);
-
- /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
- /* but previous versions have the image flipped relative to vp3 */
- if (s->theora < 0x030200)
- {
- s->flipped_image = 1;
- av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
- }
-
- s->width = get_bits(gb, 16) << 4;
- s->height = get_bits(gb, 16) << 4;
-
- if(avcodec_check_dimensions(avctx, s->width, s->height)){
- av_log(avctx, AV_LOG_ERROR, "Invalid dimensions (%dx%d)\n", s->width, s->height);
- s->width= s->height= 0;
- return -1;
- }
-
- if (s->theora >= 0x030400)
- {
- skip_bits(gb, 32); /* total number of superblocks in a frame */
- // fixme, the next field is 36bits long
- skip_bits(gb, 32); /* total number of blocks in a frame */
- skip_bits(gb, 4); /* total number of blocks in a frame */
- skip_bits(gb, 32); /* total number of macroblocks in a frame */
-
- skip_bits(gb, 24); /* frame width */
- skip_bits(gb, 24); /* frame height */
- }
- else
- {
- skip_bits(gb, 24); /* frame width */
- skip_bits(gb, 24); /* frame height */
- }
-
- if (s->theora >= 0x030200) {
- skip_bits(gb, 8); /* offset x */
- skip_bits(gb, 8); /* offset y */
- }
-
- skip_bits(gb, 32); /* fps numerator */
- skip_bits(gb, 32); /* fps denumerator */
- skip_bits(gb, 24); /* aspect numerator */
- skip_bits(gb, 24); /* aspect denumerator */
-
- if (s->theora < 0x030200)
- skip_bits(gb, 5); /* keyframe frequency force */
- skip_bits(gb, 8); /* colorspace */
- if (s->theora >= 0x030400)
- skip_bits(gb, 2); /* pixel format: 420,res,422,444 */
- skip_bits(gb, 24); /* bitrate */
-
- skip_bits(gb, 6); /* quality hint */
-
- if (s->theora >= 0x030200)
- {
- skip_bits(gb, 5); /* keyframe frequency force */
-
- if (s->theora < 0x030400)
- skip_bits(gb, 5); /* spare bits */
- }
-
-// align_get_bits(gb);
-
- avctx->width = s->width;
- avctx->height = s->height;
-
- return 0;
-}
-
-static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int i, n, matrices, inter, plane;
-
- if (s->theora >= 0x030200) {
- n = get_bits(gb, 3);
- /* loop filter limit values table */
- for (i = 0; i < 64; i++)
- s->filter_limit_values[i] = get_bits(gb, n);
- }
-
- if (s->theora >= 0x030200)
- n = get_bits(gb, 4) + 1;
- else
- n = 16;
- /* quality threshold table */
- for (i = 0; i < 64; i++)
- s->coded_ac_scale_factor[i] = get_bits(gb, n);
-
- if (s->theora >= 0x030200)
- n = get_bits(gb, 4) + 1;
- else
- n = 16;
- /* dc scale factor table */
- for (i = 0; i < 64; i++)
- s->coded_dc_scale_factor[i] = get_bits(gb, n);
-
- if (s->theora >= 0x030200)
- matrices = get_bits(gb, 9) + 1;
- else
- matrices = 3;
-
- if(matrices > 384){
- av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
- return -1;
- }
-
- for(n=0; n<matrices; n++){
- for (i = 0; i < 64; i++)
- s->base_matrix[n][i]= get_bits(gb, 8);
- }
-
- for (inter = 0; inter <= 1; inter++) {
- for (plane = 0; plane <= 2; plane++) {
- int newqr= 1;
- if (inter || plane > 0)
- newqr = get_bits(gb, 1);
- if (!newqr) {
- int qtj, plj;
- if(inter && get_bits(gb, 1)){
- qtj = 0;
- plj = plane;
- }else{
- qtj= (3*inter + plane - 1) / 3;
- plj= (plane + 2) % 3;
- }
- s->qr_count[inter][plane]= s->qr_count[qtj][plj];
- memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
- memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
- } else {
- int qri= 0;
- int qi = 0;
-
- for(;;){
- i= get_bits(gb, av_log2(matrices-1)+1);
- if(i>= matrices){
- av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
- return -1;
- }
- s->qr_base[inter][plane][qri]= i;
- if(qi >= 63)
- break;
- i = get_bits(gb, av_log2(63-qi)+1) + 1;
- s->qr_size[inter][plane][qri++]= i;
- qi += i;
- }
-
- if (qi > 63) {
- av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
- return -1;
- }
- s->qr_count[inter][plane]= qri;
- }
- }
- }
-
- /* Huffman tables */
- for (s->hti = 0; s->hti < 80; s->hti++) {
- s->entries = 0;
- s->huff_code_size = 1;
- if (!get_bits(gb, 1)) {
- s->hbits = 0;
- read_huffman_tree(avctx, gb);
- s->hbits = 1;
- read_huffman_tree(avctx, gb);
- }
- }
-
- s->theora_tables = 1;
-
- return 0;
-}
-
-static int theora_decode_init(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- GetBitContext gb;
- int ptype;
- uint8_t *p= avctx->extradata;
- int op_bytes, i;
-
- s->theora = 1;
-
- if (!avctx->extradata_size)
- {
- av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
- return -1;
- }
-
- for(i=0;i<3;i++) {
- op_bytes = *(p++)<<8;
- op_bytes += *(p++);
-
- init_get_bits(&gb, p, op_bytes);
- p += op_bytes;
-
- ptype = get_bits(&gb, 8);
- debug_vp3("Theora headerpacket type: %x\n", ptype);
-
- if (!(ptype & 0x80))
- {
- av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
-// return -1;
- }
-
- // FIXME: check for this aswell
- skip_bits(&gb, 6*8); /* "theora" */
-
- switch(ptype)
- {
- case 0x80:
- theora_decode_header(avctx, &gb);
- break;
- case 0x81:
-// FIXME: is this needed? it breaks sometimes
-// theora_decode_comments(avctx, gb);
- break;
- case 0x82:
- theora_decode_tables(avctx, &gb);
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
- break;
- }
- if(8*op_bytes != get_bits_count(&gb))
- av_log(avctx, AV_LOG_ERROR, "%d bits left in packet %X\n", 8*op_bytes - get_bits_count(&gb), ptype);
- if (s->theora < 0x030200)
- break;
- }
-
- vp3_decode_init(avctx);
- return 0;
-}
-
-AVCodec vp3_decoder = {
- "vp3",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP3,
- sizeof(Vp3DecodeContext),
- vp3_decode_init,
- NULL,
- vp3_decode_end,
- vp3_decode_frame,
- 0,
- NULL
-};
-
-AVCodec theora_decoder = {
- "theora",
- CODEC_TYPE_VIDEO,
- CODEC_ID_THEORA,
- sizeof(Vp3DecodeContext),
- theora_decode_init,
- NULL,
- vp3_decode_end,
- vp3_decode_frame,
- 0,
- NULL
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 14:16:02 +0000