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Diffstat (limited to 'src/libffmpeg/libavcodec/msmpeg4.c')
-rw-r--r--src/libffmpeg/libavcodec/msmpeg4.c1938
1 files changed, 0 insertions, 1938 deletions
diff --git a/src/libffmpeg/libavcodec/msmpeg4.c b/src/libffmpeg/libavcodec/msmpeg4.c
deleted file mode 100644
index a8124172b..000000000
--- a/src/libffmpeg/libavcodec/msmpeg4.c
+++ /dev/null
@@ -1,1938 +0,0 @@
-/*
- * MSMPEG4 backend for ffmpeg encoder and decoder
- * Copyright (c) 2001 Fabrice Bellard.
- * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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
- *
- * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
- */
-
-/**
- * @file msmpeg4.c
- * MSMPEG4 backend for ffmpeg encoder and decoder.
- */
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-/*
- * You can also call this codec : MPEG4 with a twist !
- *
- * TODO:
- * - (encoding) select best mv table (two choices)
- * - (encoding) select best vlc/dc table
- */
-//#define DEBUG
-
-#define DC_VLC_BITS 9
-#define CBPY_VLC_BITS 6
-#define INTER_INTRA_VLC_BITS 3
-#define V1_INTRA_CBPC_VLC_BITS 6
-#define V1_INTER_CBPC_VLC_BITS 6
-#define V2_INTRA_CBPC_VLC_BITS 3
-#define V2_MB_TYPE_VLC_BITS 7
-#define MV_VLC_BITS 9
-#define V2_MV_VLC_BITS 9
-#define TEX_VLC_BITS 9
-#define MB_NON_INTRA_VLC_BITS 9
-#define MB_INTRA_VLC_BITS 9
-
-#define II_BITRATE 128*1024
-#define MBAC_BITRATE 50*1024
-
-#define DEFAULT_INTER_INDEX 3
-
-static uint32_t v2_dc_lum_table[512][2];
-static uint32_t v2_dc_chroma_table[512][2];
-
-static inline void msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n);
-static inline int msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded, const uint8_t *scantable);
-static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
-static int msmpeg4_decode_motion(MpegEncContext * s,
- int *mx_ptr, int *my_ptr);
-static void init_h263_dc_for_msmpeg4(void);
-static inline void msmpeg4_memsetw(short *tab, int val, int n);
-#ifdef CONFIG_ENCODERS
-static void msmpeg4v2_encode_motion(MpegEncContext * s, int val);
-static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra);
-#endif //CONFIG_ENCODERS
-static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
-static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
-static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
-
-/* vc1 externs */
-extern uint8_t wmv3_dc_scale_table[32];
-
-#ifdef DEBUG
-int intra_count = 0;
-int frame_count = 0;
-#endif
-
-#include "msmpeg4data.h"
-
-#ifdef CONFIG_ENCODERS //strangely gcc includes this even if its not references
-static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];
-#endif //CONFIG_ENCODERS
-
-static void common_init(MpegEncContext * s)
-{
- static int inited=0;
-
- switch(s->msmpeg4_version){
- case 1:
- case 2:
- s->y_dc_scale_table=
- s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
- break;
- case 3:
- if(s->workaround_bugs){
- s->y_dc_scale_table= old_ff_y_dc_scale_table;
- s->c_dc_scale_table= old_ff_c_dc_scale_table;
- } else{
- s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table;
- s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
- }
- break;
- case 4:
- case 5:
- s->y_dc_scale_table= wmv1_y_dc_scale_table;
- s->c_dc_scale_table= wmv1_c_dc_scale_table;
- break;
-#if defined(CONFIG_WMV3_DECODER)||defined(CONFIG_VC1_DECODER)
- case 6:
- s->y_dc_scale_table= wmv3_dc_scale_table;
- s->c_dc_scale_table= wmv3_dc_scale_table;
- break;
-#endif
-
- }
-
-
- if(s->msmpeg4_version>=4){
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , wmv1_scantable[1]);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, wmv1_scantable[2]);
- ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, wmv1_scantable[3]);
- ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , wmv1_scantable[0]);
- }
- //Note the default tables are set in common_init in mpegvideo.c
-
- if(!inited){
- inited=1;
-
- init_h263_dc_for_msmpeg4();
- }
-}
-
-#ifdef CONFIG_ENCODERS
-
-/* build the table which associate a (x,y) motion vector to a vlc */
-static void init_mv_table(MVTable *tab)
-{
- int i, x, y;
-
- tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);
- /* mark all entries as not used */
- for(i=0;i<4096;i++)
- tab->table_mv_index[i] = tab->n;
-
- for(i=0;i<tab->n;i++) {
- x = tab->table_mvx[i];
- y = tab->table_mvy[i];
- tab->table_mv_index[(x << 6) | y] = i;
- }
-}
-
-static void code012(PutBitContext *pb, int n)
-{
- if (n == 0) {
- put_bits(pb, 1, 0);
- } else {
- put_bits(pb, 1, 1);
- put_bits(pb, 1, (n >= 2));
- }
-}
-
-void ff_msmpeg4_encode_init(MpegEncContext *s)
-{
- static int init_done=0;
- int i;
-
- common_init(s);
- if(s->msmpeg4_version>=4){
- s->min_qcoeff= -255;
- s->max_qcoeff= 255;
- }
-
- if (!init_done) {
- /* init various encoding tables */
- init_done = 1;
- init_mv_table(&mv_tables[0]);
- init_mv_table(&mv_tables[1]);
- for(i=0;i<NB_RL_TABLES;i++)
- init_rl(&rl_table[i], 1);
-
- for(i=0; i<NB_RL_TABLES; i++){
- int level;
- for(level=0; level<=MAX_LEVEL; level++){
- int run;
- for(run=0; run<=MAX_RUN; run++){
- int last;
- for(last=0; last<2; last++){
- rl_length[i][level][run][last]= get_size_of_code(s, &rl_table[ i], last, run, level, 0);
- }
- }
- }
- }
- }
-}
-
-static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){
- int size=0;
- int code;
- int run_diff= intra ? 0 : 1;
-
- code = get_rl_index(rl, last, run, level);
- size+= rl->table_vlc[code][1];
- if (code == rl->n) {
- int level1, run1;
-
- level1 = level - rl->max_level[last][run];
- if (level1 < 1)
- goto esc2;
- code = get_rl_index(rl, last, run, level1);
- if (code == rl->n) {
- esc2:
- size++;
- if (level > MAX_LEVEL)
- goto esc3;
- run1 = run - rl->max_run[last][level] - run_diff;
- if (run1 < 0)
- goto esc3;
- code = get_rl_index(rl, last, run1, level);
- if (code == rl->n) {
- esc3:
- /* third escape */
- size+=1+1+6+8;
- } else {
- /* second escape */
- size+= 1+1+ rl->table_vlc[code][1];
- }
- } else {
- /* first escape */
- size+= 1+1+ rl->table_vlc[code][1];
- }
- } else {
- size++;
- }
- return size;
-}
-
-static void find_best_tables(MpegEncContext * s)
-{
- int i;
- int best =-1, best_size =9999999;
- int chroma_best=-1, best_chroma_size=9999999;
-
- for(i=0; i<3; i++){
- int level;
- int chroma_size=0;
- int size=0;
-
- if(i>0){// ;)
- size++;
- chroma_size++;
- }
- for(level=0; level<=MAX_LEVEL; level++){
- int run;
- for(run=0; run<=MAX_RUN; run++){
- int last;
- const int last_size= size + chroma_size;
- for(last=0; last<2; last++){
- int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];
- int intra_luma_count = s->ac_stats[1][0][level][run][last];
- int intra_chroma_count= s->ac_stats[1][1][level][run][last];
-
- if(s->pict_type==I_TYPE){
- size += intra_luma_count *rl_length[i ][level][run][last];
- chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
- }else{
- size+= intra_luma_count *rl_length[i ][level][run][last]
- +intra_chroma_count*rl_length[i+3][level][run][last]
- +inter_count *rl_length[i+3][level][run][last];
- }
- }
- if(last_size == size+chroma_size) break;
- }
- }
- if(size<best_size){
- best_size= size;
- best= i;
- }
- if(chroma_size<best_chroma_size){
- best_chroma_size= chroma_size;
- chroma_best= i;
- }
- }
-
-// printf("type:%d, best:%d, qp:%d, var:%d, mcvar:%d, size:%d //\n",
-// s->pict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size);
-
- if(s->pict_type==P_TYPE) chroma_best= best;
-
- memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);
-
- s->rl_table_index = best;
- s->rl_chroma_table_index= chroma_best;
-
- if(s->pict_type != s->last_non_b_pict_type){
- s->rl_table_index= 2;
- if(s->pict_type==I_TYPE)
- s->rl_chroma_table_index= 1;
- else
- s->rl_chroma_table_index= 2;
- }
-
-}
-
-/* write MSMPEG4 compatible frame header */
-void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
-{
- find_best_tables(s);
-
- align_put_bits(&s->pb);
- put_bits(&s->pb, 2, s->pict_type - 1);
-
- put_bits(&s->pb, 5, s->qscale);
- if(s->msmpeg4_version<=2){
- s->rl_table_index = 2;
- s->rl_chroma_table_index = 2;
- }
-
- s->dc_table_index = 1;
- s->mv_table_index = 1; /* only if P frame */
- s->use_skip_mb_code = 1; /* only if P frame */
- s->per_mb_rl_table = 0;
- if(s->msmpeg4_version==4)
- s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==P_TYPE);
-//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
-
- if (s->pict_type == I_TYPE) {
- s->slice_height= s->mb_height/1;
- put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);
-
- if(s->msmpeg4_version==4){
- msmpeg4_encode_ext_header(s);
- if(s->bit_rate>MBAC_BITRATE)
- put_bits(&s->pb, 1, s->per_mb_rl_table);
- }
-
- if(s->msmpeg4_version>2){
- if(!s->per_mb_rl_table){
- code012(&s->pb, s->rl_chroma_table_index);
- code012(&s->pb, s->rl_table_index);
- }
-
- put_bits(&s->pb, 1, s->dc_table_index);
- }
- } else {
- put_bits(&s->pb, 1, s->use_skip_mb_code);
-
- if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)
- put_bits(&s->pb, 1, s->per_mb_rl_table);
-
- if(s->msmpeg4_version>2){
- if(!s->per_mb_rl_table)
- code012(&s->pb, s->rl_table_index);
-
- put_bits(&s->pb, 1, s->dc_table_index);
-
- put_bits(&s->pb, 1, s->mv_table_index);
- }
- }
-
- s->esc3_level_length= 0;
- s->esc3_run_length= 0;
-
-#ifdef DEBUG
- intra_count = 0;
- av_log(s->avctx, AV_LOG_DEBUG, "*****frame %d:\n", frame_count++);
-#endif
-}
-
-void msmpeg4_encode_ext_header(MpegEncContext * s)
-{
- put_bits(&s->pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
-
- put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));
-
- if(s->msmpeg4_version>=3)
- put_bits(&s->pb, 1, s->flipflop_rounding);
- else
- assert(s->flipflop_rounding==0);
-}
-
-#endif //CONFIG_ENCODERS
-
-/* predict coded block */
-static inline int coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
-{
- int xy, wrap, pred, a, b, c;
-
- xy = s->block_index[n];
- wrap = s->b8_stride;
-
- /* B C
- * A X
- */
- a = s->coded_block[xy - 1 ];
- b = s->coded_block[xy - 1 - wrap];
- c = s->coded_block[xy - wrap];
-
- if (b == c) {
- pred = a;
- } else {
- pred = c;
- }
-
- /* store value */
- *coded_block_ptr = &s->coded_block[xy];
-
- return pred;
-}
-
-#ifdef CONFIG_ENCODERS
-
-static void msmpeg4_encode_motion(MpegEncContext * s,
- int mx, int my)
-{
- int code;
- MVTable *mv;
-
- /* modulo encoding */
- /* WARNING : you cannot reach all the MVs even with the modulo
- encoding. This is a somewhat strange compromise they took !!! */
- if (mx <= -64)
- mx += 64;
- else if (mx >= 64)
- mx -= 64;
- if (my <= -64)
- my += 64;
- else if (my >= 64)
- my -= 64;
-
- mx += 32;
- my += 32;
-#if 0
- if ((unsigned)mx >= 64 ||
- (unsigned)my >= 64)
- av_log(s->avctx, AV_LOG_ERROR, "error mx=%d my=%d\n", mx, my);
-#endif
- mv = &mv_tables[s->mv_table_index];
-
- code = mv->table_mv_index[(mx << 6) | my];
- put_bits(&s->pb,
- mv->table_mv_bits[code],
- mv->table_mv_code[code]);
- if (code == mv->n) {
- /* escape : code litterally */
- put_bits(&s->pb, 6, mx);
- put_bits(&s->pb, 6, my);
- }
-}
-
-static inline void handle_slices(MpegEncContext *s){
- if (s->mb_x == 0) {
- if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
- if(s->msmpeg4_version < 4){
- ff_mpeg4_clean_buffers(s);
- }
- s->first_slice_line = 1;
- } else {
- s->first_slice_line = 0;
- }
- }
-}
-
-void msmpeg4_encode_mb(MpegEncContext * s,
- DCTELEM block[6][64],
- int motion_x, int motion_y)
-{
- int cbp, coded_cbp, i;
- int pred_x, pred_y;
- uint8_t *coded_block;
-
- handle_slices(s);
-
- if (!s->mb_intra) {
- /* compute cbp */
- cbp = 0;
- for (i = 0; i < 6; i++) {
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (5 - i);
- }
- if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {
- /* skip macroblock */
- put_bits(&s->pb, 1, 1);
- s->last_bits++;
- s->misc_bits++;
- s->skip_count++;
-
- return;
- }
- if (s->use_skip_mb_code)
- put_bits(&s->pb, 1, 0); /* mb coded */
-
- if(s->msmpeg4_version<=2){
- put_bits(&s->pb,
- v2_mb_type[cbp&3][1],
- v2_mb_type[cbp&3][0]);
- if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;
- else coded_cbp= cbp;
-
- put_bits(&s->pb,
- cbpy_tab[coded_cbp>>2][1],
- cbpy_tab[coded_cbp>>2][0]);
-
- s->misc_bits += get_bits_diff(s);
-
- h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
- msmpeg4v2_encode_motion(s, motion_x - pred_x);
- msmpeg4v2_encode_motion(s, motion_y - pred_y);
- }else{
- put_bits(&s->pb,
- table_mb_non_intra[cbp + 64][1],
- table_mb_non_intra[cbp + 64][0]);
-
- s->misc_bits += get_bits_diff(s);
-
- /* motion vector */
- h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
- msmpeg4_encode_motion(s, motion_x - pred_x,
- motion_y - pred_y);
- }
-
- s->mv_bits += get_bits_diff(s);
-
- for (i = 0; i < 6; i++) {
- msmpeg4_encode_block(s, block[i], i);
- }
- s->p_tex_bits += get_bits_diff(s);
- } else {
- /* compute cbp */
- cbp = 0;
- coded_cbp = 0;
- for (i = 0; i < 6; i++) {
- int val, pred;
- val = (s->block_last_index[i] >= 1);
- cbp |= val << (5 - i);
- if (i < 4) {
- /* predict value for close blocks only for luma */
- pred = coded_block_pred(s, i, &coded_block);
- *coded_block = val;
- val = val ^ pred;
- }
- coded_cbp |= val << (5 - i);
- }
-#if 0
- if (coded_cbp)
- printf("cbp=%x %x\n", cbp, coded_cbp);
-#endif
-
- if(s->msmpeg4_version<=2){
- if (s->pict_type == I_TYPE) {
- put_bits(&s->pb,
- v2_intra_cbpc[cbp&3][1], v2_intra_cbpc[cbp&3][0]);
- } else {
- if (s->use_skip_mb_code)
- put_bits(&s->pb, 1, 0); /* mb coded */
- put_bits(&s->pb,
- v2_mb_type[(cbp&3) + 4][1],
- v2_mb_type[(cbp&3) + 4][0]);
- }
- put_bits(&s->pb, 1, 0); /* no AC prediction yet */
- put_bits(&s->pb,
- cbpy_tab[cbp>>2][1],
- cbpy_tab[cbp>>2][0]);
- }else{
- if (s->pict_type == I_TYPE) {
- put_bits(&s->pb,
- ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
- } else {
- if (s->use_skip_mb_code)
- put_bits(&s->pb, 1, 0); /* mb coded */
- put_bits(&s->pb,
- table_mb_non_intra[cbp][1],
- table_mb_non_intra[cbp][0]);
- }
- put_bits(&s->pb, 1, 0); /* no AC prediction yet */
- if(s->inter_intra_pred){
- s->h263_aic_dir=0;
- put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
- }
- }
- s->misc_bits += get_bits_diff(s);
-
- for (i = 0; i < 6; i++) {
- msmpeg4_encode_block(s, block[i], i);
- }
- s->i_tex_bits += get_bits_diff(s);
- s->i_count++;
- }
-}
-
-#endif //CONFIG_ENCODERS
-
-static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n,
- int32_t **dc_val_ptr)
-{
- int i;
-
- if (n < 4) {
- i= 0;
- } else {
- i= n-3;
- }
-
- *dc_val_ptr= &s->last_dc[i];
- return s->last_dc[i];
-}
-
-static int get_dc(uint8_t *src, int stride, int scale)
-{
- int y;
- int sum=0;
- for(y=0; y<8; y++){
- int x;
- for(x=0; x<8; x++){
- sum+=src[x + y*stride];
- }
- }
- return FASTDIV((sum + (scale>>1)), scale);
-}
-
-/* dir = 0: left, dir = 1: top prediction */
-static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
- int16_t **dc_val_ptr, int *dir_ptr)
-{
- int a, b, c, wrap, pred, scale;
- int16_t *dc_val;
-
- /* find prediction */
- if (n < 4) {
- scale = s->y_dc_scale;
- } else {
- scale = s->c_dc_scale;
- }
-
- wrap = s->block_wrap[n];
- dc_val= s->dc_val[0] + s->block_index[n];
-
- /* B C
- * A X
- */
- a = dc_val[ - 1];
- b = dc_val[ - 1 - wrap];
- c = dc_val[ - wrap];
-
- if(s->first_slice_line && (n&2)==0 && s->msmpeg4_version<4){
- b=c=1024;
- }
-
- /* XXX: the following solution consumes divisions, but it does not
- necessitate to modify mpegvideo.c. The problem comes from the
- fact they decided to store the quantized DC (which would lead
- to problems if Q could vary !) */
-#if (defined(ARCH_X86)) && !defined PIC
- asm volatile(
- "movl %3, %%eax \n\t"
- "shrl $1, %%eax \n\t"
- "addl %%eax, %2 \n\t"
- "addl %%eax, %1 \n\t"
- "addl %0, %%eax \n\t"
- "mull %4 \n\t"
- "movl %%edx, %0 \n\t"
- "movl %1, %%eax \n\t"
- "mull %4 \n\t"
- "movl %%edx, %1 \n\t"
- "movl %2, %%eax \n\t"
- "mull %4 \n\t"
- "movl %%edx, %2 \n\t"
- : "+b" (a), "+c" (b), "+D" (c)
- : "g" (scale), "S" (ff_inverse[scale])
- : "%eax", "%edx"
- );
-#else
- /* #elif defined (ARCH_ALPHA) */
- /* Divisions are extremely costly on Alpha; optimize the most
- common case. But they are costly everywhere...
- */
- if (scale == 8) {
- a = (a + (8 >> 1)) / 8;
- b = (b + (8 >> 1)) / 8;
- c = (c + (8 >> 1)) / 8;
- } else {
- a = FASTDIV((a + (scale >> 1)), scale);
- b = FASTDIV((b + (scale >> 1)), scale);
- c = FASTDIV((c + (scale >> 1)), scale);
- }
-#endif
- /* XXX: WARNING: they did not choose the same test as MPEG4. This
- is very important ! */
- if(s->msmpeg4_version>3){
- if(s->inter_intra_pred){
- uint8_t *dest;
- int wrap;
-
- if(n==1){
- pred=a;
- *dir_ptr = 0;
- }else if(n==2){
- pred=c;
- *dir_ptr = 1;
- }else if(n==3){
- if (abs(a - b) < abs(b - c)) {
- pred = c;
- *dir_ptr = 1;
- } else {
- pred = a;
- *dir_ptr = 0;
- }
- }else{
- if(n<4){
- wrap= s->linesize;
- dest= s->current_picture.data[0] + (((n>>1) + 2*s->mb_y) * 8* wrap ) + ((n&1) + 2*s->mb_x) * 8;
- }else{
- wrap= s->uvlinesize;
- dest= s->current_picture.data[n-3] + (s->mb_y * 8 * wrap) + s->mb_x * 8;
- }
- if(s->mb_x==0) a= (1024 + (scale>>1))/scale;
- else a= get_dc(dest-8, wrap, scale*8);
- if(s->mb_y==0) c= (1024 + (scale>>1))/scale;
- else c= get_dc(dest-8*wrap, wrap, scale*8);
-
- if (s->h263_aic_dir==0) {
- pred= a;
- *dir_ptr = 0;
- }else if (s->h263_aic_dir==1) {
- if(n==0){
- pred= c;
- *dir_ptr = 1;
- }else{
- pred= a;
- *dir_ptr = 0;
- }
- }else if (s->h263_aic_dir==2) {
- if(n==0){
- pred= a;
- *dir_ptr = 0;
- }else{
- pred= c;
- *dir_ptr = 1;
- }
- } else {
- pred= c;
- *dir_ptr = 1;
- }
- }
- }else{
- if (abs(a - b) < abs(b - c)) {
- pred = c;
- *dir_ptr = 1;
- } else {
- pred = a;
- *dir_ptr = 0;
- }
- }
- }else{
- if (abs(a - b) <= abs(b - c)) {
- pred = c;
- *dir_ptr = 1;
- } else {
- pred = a;
- *dir_ptr = 0;
- }
- }
-
- /* update predictor */
- *dc_val_ptr = &dc_val[0];
- return pred;
-}
-
-#define DC_MAX 119
-
-static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)
-{
- int sign, code;
- int pred;
-
- if(s->msmpeg4_version==1){
- int32_t *dc_val;
- pred = msmpeg4v1_pred_dc(s, n, &dc_val);
-
- /* update predictor */
- *dc_val= level;
- }else{
- int16_t *dc_val;
- pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
-
- /* update predictor */
- if (n < 4) {
- *dc_val = level * s->y_dc_scale;
- } else {
- *dc_val = level * s->c_dc_scale;
- }
- }
-
- /* do the prediction */
- level -= pred;
-
- if(s->msmpeg4_version<=2){
- if (n < 4) {
- put_bits(&s->pb,
- v2_dc_lum_table[level+256][1],
- v2_dc_lum_table[level+256][0]);
- }else{
- put_bits(&s->pb,
- v2_dc_chroma_table[level+256][1],
- v2_dc_chroma_table[level+256][0]);
- }
- }else{
- sign = 0;
- if (level < 0) {
- level = -level;
- sign = 1;
- }
- code = level;
- if (code > DC_MAX)
- code = DC_MAX;
-
- if (s->dc_table_index == 0) {
- if (n < 4) {
- put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
- } else {
- put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
- }
- } else {
- if (n < 4) {
- put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
- } else {
- put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
- }
- }
-
- if (code == DC_MAX)
- put_bits(&s->pb, 8, level);
-
- if (level != 0) {
- put_bits(&s->pb, 1, sign);
- }
- }
-}
-
-/* Encoding of a block. Very similar to MPEG4 except for a different
- escape coding (same as H263) and more vlc tables.
- */
-static inline void msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n)
-{
- int level, run, last, i, j, last_index;
- int last_non_zero, sign, slevel;
- int code, run_diff, dc_pred_dir;
- const RLTable *rl;
- const uint8_t *scantable;
-
- if (s->mb_intra) {
- msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
- i = 1;
- if (n < 4) {
- rl = &rl_table[s->rl_table_index];
- } else {
- rl = &rl_table[3 + s->rl_chroma_table_index];
- }
- run_diff = 0;
- scantable= s->intra_scantable.permutated;
- } else {
- i = 0;
- rl = &rl_table[3 + s->rl_table_index];
- if(s->msmpeg4_version<=2)
- run_diff = 0;
- else
- run_diff = 1;
- scantable= s->inter_scantable.permutated;
- }
-
- /* recalculate block_last_index for M$ wmv1 */
- if(s->msmpeg4_version>=4 && s->block_last_index[n]>0){
- for(last_index=63; last_index>=0; last_index--){
- if(block[scantable[last_index]]) break;
- }
- s->block_last_index[n]= last_index;
- }else
- last_index = s->block_last_index[n];
- /* AC coefs */
- last_non_zero = i - 1;
- for (; i <= last_index; i++) {
- j = scantable[i];
- level = block[j];
- if (level) {
- run = i - last_non_zero - 1;
- last = (i == last_index);
- sign = 0;
- slevel = level;
- if (level < 0) {
- sign = 1;
- level = -level;
- }
-
- if(level<=MAX_LEVEL && run<=MAX_RUN){
- s->ac_stats[s->mb_intra][n>3][level][run][last]++;
- }
-#if 0
-else
- s->ac_stats[s->mb_intra][n>3][40][63][0]++; //esc3 like
-#endif
- code = get_rl_index(rl, last, run, level);
- put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- if (code == rl->n) {
- int level1, run1;
-
- level1 = level - rl->max_level[last][run];
- if (level1 < 1)
- goto esc2;
- code = get_rl_index(rl, last, run, level1);
- if (code == rl->n) {
- esc2:
- put_bits(&s->pb, 1, 0);
- if (level > MAX_LEVEL)
- goto esc3;
- run1 = run - rl->max_run[last][level] - run_diff;
- if (run1 < 0)
- goto esc3;
- code = get_rl_index(rl, last, run1, level);
- if (code == rl->n) {
- esc3:
- /* third escape */
- put_bits(&s->pb, 1, 0);
- put_bits(&s->pb, 1, last);
- if(s->msmpeg4_version>=4){
- if(s->esc3_level_length==0){
- s->esc3_level_length=8;
- s->esc3_run_length= 6;
- if(s->qscale<8)
- put_bits(&s->pb, 6, 3);
- else
- put_bits(&s->pb, 8, 3);
- }
- put_bits(&s->pb, s->esc3_run_length, run);
- put_bits(&s->pb, 1, sign);
- put_bits(&s->pb, s->esc3_level_length, level);
- }else{
- put_bits(&s->pb, 6, run);
- put_bits(&s->pb, 8, slevel & 0xff);
- }
- } else {
- /* second escape */
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- put_bits(&s->pb, 1, sign);
- }
- } else {
- /* first escape */
- put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
- put_bits(&s->pb, 1, sign);
- }
- } else {
- put_bits(&s->pb, 1, sign);
- }
- last_non_zero = i;
- }
- }
-}
-
-/****************************************/
-/* decoding stuff */
-
-static VLC mb_non_intra_vlc[4];
-VLC ff_msmp4_mb_i_vlc;
-VLC ff_msmp4_dc_luma_vlc[2];
-VLC ff_msmp4_dc_chroma_vlc[2];
-static VLC v2_dc_lum_vlc;
-static VLC v2_dc_chroma_vlc;
-static VLC cbpy_vlc;
-static VLC v2_intra_cbpc_vlc;
-static VLC v2_mb_type_vlc;
-static VLC v2_mv_vlc;
-static VLC v1_intra_cbpc_vlc;
-static VLC v1_inter_cbpc_vlc;
-static VLC inter_intra_vlc;
-
-/* this table is practically identical to the one from h263 except that its inverted */
-static void init_h263_dc_for_msmpeg4(void)
-{
- int level, uni_code, uni_len;
-
- for(level=-256; level<256; level++){
- int size, v, l;
- /* find number of bits */
- size = 0;
- v = abs(level);
- while (v) {
- v >>= 1;
- size++;
- }
-
- if (level < 0)
- l= (-level) ^ ((1 << size) - 1);
- else
- l= level;
-
- /* luminance h263 */
- uni_code= DCtab_lum[size][0];
- uni_len = DCtab_lum[size][1];
- uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility
-
- if (size > 0) {
- uni_code<<=size; uni_code|=l;
- uni_len+=size;
- if (size > 8){
- uni_code<<=1; uni_code|=1;
- uni_len++;
- }
- }
- v2_dc_lum_table[level+256][0]= uni_code;
- v2_dc_lum_table[level+256][1]= uni_len;
-
- /* chrominance h263 */
- uni_code= DCtab_chrom[size][0];
- uni_len = DCtab_chrom[size][1];
- uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility
-
- if (size > 0) {
- uni_code<<=size; uni_code|=l;
- uni_len+=size;
- if (size > 8){
- uni_code<<=1; uni_code|=1;
- uni_len++;
- }
- }
- v2_dc_chroma_table[level+256][0]= uni_code;
- v2_dc_chroma_table[level+256][1]= uni_len;
-
- }
-}
-
-/* init all vlc decoding tables */
-int ff_msmpeg4_decode_init(MpegEncContext *s)
-{
- static int done = 0;
- int i;
- MVTable *mv;
-
- common_init(s);
-
- if (!done) {
- done = 1;
-
- for(i=0;i<NB_RL_TABLES;i++) {
- init_rl(&rl_table[i], 1);
- init_vlc_rl(&rl_table[i], 1);
- }
- for(i=0;i<2;i++) {
- mv = &mv_tables[i];
- init_vlc(&mv->vlc, MV_VLC_BITS, mv->n + 1,
- mv->table_mv_bits, 1, 1,
- mv->table_mv_code, 2, 2, 1);
- }
-
- init_vlc(&ff_msmp4_dc_luma_vlc[0], DC_VLC_BITS, 120,
- &ff_table0_dc_lum[0][1], 8, 4,
- &ff_table0_dc_lum[0][0], 8, 4, 1);
- init_vlc(&ff_msmp4_dc_chroma_vlc[0], DC_VLC_BITS, 120,
- &ff_table0_dc_chroma[0][1], 8, 4,
- &ff_table0_dc_chroma[0][0], 8, 4, 1);
- init_vlc(&ff_msmp4_dc_luma_vlc[1], DC_VLC_BITS, 120,
- &ff_table1_dc_lum[0][1], 8, 4,
- &ff_table1_dc_lum[0][0], 8, 4, 1);
- init_vlc(&ff_msmp4_dc_chroma_vlc[1], DC_VLC_BITS, 120,
- &ff_table1_dc_chroma[0][1], 8, 4,
- &ff_table1_dc_chroma[0][0], 8, 4, 1);
-
- init_vlc(&v2_dc_lum_vlc, DC_VLC_BITS, 512,
- &v2_dc_lum_table[0][1], 8, 4,
- &v2_dc_lum_table[0][0], 8, 4, 1);
- init_vlc(&v2_dc_chroma_vlc, DC_VLC_BITS, 512,
- &v2_dc_chroma_table[0][1], 8, 4,
- &v2_dc_chroma_table[0][0], 8, 4, 1);
-
- init_vlc(&cbpy_vlc, CBPY_VLC_BITS, 16,
- &cbpy_tab[0][1], 2, 1,
- &cbpy_tab[0][0], 2, 1, 1);
- init_vlc(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4,
- &v2_intra_cbpc[0][1], 2, 1,
- &v2_intra_cbpc[0][0], 2, 1, 1);
- init_vlc(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8,
- &v2_mb_type[0][1], 2, 1,
- &v2_mb_type[0][0], 2, 1, 1);
- init_vlc(&v2_mv_vlc, V2_MV_VLC_BITS, 33,
- &mvtab[0][1], 2, 1,
- &mvtab[0][0], 2, 1, 1);
-
- for(i=0; i<4; i++){
- init_vlc(&mb_non_intra_vlc[i], MB_NON_INTRA_VLC_BITS, 128,
- &wmv2_inter_table[i][0][1], 8, 4,
- &wmv2_inter_table[i][0][0], 8, 4, 1); //FIXME name?
- }
-
- init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
- &ff_msmp4_mb_i_table[0][1], 4, 2,
- &ff_msmp4_mb_i_table[0][0], 4, 2, 1);
-
- init_vlc(&v1_intra_cbpc_vlc, V1_INTRA_CBPC_VLC_BITS, 8,
- intra_MCBPC_bits, 1, 1,
- intra_MCBPC_code, 1, 1, 1);
- init_vlc(&v1_inter_cbpc_vlc, V1_INTER_CBPC_VLC_BITS, 25,
- inter_MCBPC_bits, 1, 1,
- inter_MCBPC_code, 1, 1, 1);
-
- init_vlc(&inter_intra_vlc, INTER_INTRA_VLC_BITS, 4,
- &table_inter_intra[0][1], 2, 1,
- &table_inter_intra[0][0], 2, 1, 1);
- }
-
- switch(s->msmpeg4_version){
- case 1:
- case 2:
- s->decode_mb= msmpeg4v12_decode_mb;
- break;
- case 3:
- case 4:
- s->decode_mb= msmpeg4v34_decode_mb;
- break;
- case 5:
- s->decode_mb= wmv2_decode_mb;
- case 6:
- //FIXME + TODO VC1 decode mb
- break;
- }
-
- s->slice_height= s->mb_height; //to avoid 1/0 if the first frame isnt a keyframe
-
- return 0;
-}
-
-int msmpeg4_decode_picture_header(MpegEncContext * s)
-{
- int code;
-
-#if 0
-{
-int i;
-for(i=0; i<s->gb.size_in_bits; i++)
- av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
-// get_bits1(&s->gb);
-av_log(s->avctx, AV_LOG_DEBUG, "END\n");
-return -1;
-}
-#endif
-
- if(s->msmpeg4_version==1){
- int start_code, num;
- start_code = (get_bits(&s->gb, 16)<<16) | get_bits(&s->gb, 16);
- if(start_code!=0x00000100){
- av_log(s->avctx, AV_LOG_ERROR, "invalid startcode\n");
- return -1;
- }
-
- num= get_bits(&s->gb, 5); // frame number */
- }
-
- s->pict_type = get_bits(&s->gb, 2) + 1;
- if (s->pict_type != I_TYPE &&
- s->pict_type != P_TYPE){
- av_log(s->avctx, AV_LOG_ERROR, "invalid picture type\n");
- return -1;
- }
-#if 0
-{
- static int had_i=0;
- if(s->pict_type == I_TYPE) had_i=1;
- if(!had_i) return -1;
-}
-#endif
- s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
- if(s->qscale==0){
- av_log(s->avctx, AV_LOG_ERROR, "invalid qscale\n");
- return -1;
- }
-
- if (s->pict_type == I_TYPE) {
- code = get_bits(&s->gb, 5);
- if(s->msmpeg4_version==1){
- if(code==0 || code>s->mb_height){
- av_log(s->avctx, AV_LOG_ERROR, "invalid slice height %d\n", code);
- return -1;
- }
-
- s->slice_height = code;
- }else{
- /* 0x17: one slice, 0x18: two slices, ... */
- if (code < 0x17){
- av_log(s->avctx, AV_LOG_ERROR, "error, slice code was %X\n", code);
- return -1;
- }
-
- s->slice_height = s->mb_height / (code - 0x16);
- }
-
- switch(s->msmpeg4_version){
- case 1:
- case 2:
- s->rl_chroma_table_index = 2;
- s->rl_table_index = 2;
-
- s->dc_table_index = 0; //not used
- break;
- case 3:
- s->rl_chroma_table_index = decode012(&s->gb);
- s->rl_table_index = decode012(&s->gb);
-
- s->dc_table_index = get_bits1(&s->gb);
- break;
- case 4:
- msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8);
-
- if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
- else s->per_mb_rl_table= 0;
-
- if(!s->per_mb_rl_table){
- s->rl_chroma_table_index = decode012(&s->gb);
- s->rl_table_index = decode012(&s->gb);
- }
-
- s->dc_table_index = get_bits1(&s->gb);
- s->inter_intra_pred= 0;
- break;
- }
- s->no_rounding = 1;
- if(s->avctx->debug&FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n",
- s->qscale,
- s->rl_chroma_table_index,
- s->rl_table_index,
- s->dc_table_index,
- s->per_mb_rl_table,
- s->slice_height);
- } else {
- switch(s->msmpeg4_version){
- case 1:
- case 2:
- if(s->msmpeg4_version==1)
- s->use_skip_mb_code = 1;
- else
- s->use_skip_mb_code = get_bits1(&s->gb);
- s->rl_table_index = 2;
- s->rl_chroma_table_index = s->rl_table_index;
- s->dc_table_index = 0; //not used
- s->mv_table_index = 0;
- break;
- case 3:
- s->use_skip_mb_code = get_bits1(&s->gb);
- s->rl_table_index = decode012(&s->gb);
- s->rl_chroma_table_index = s->rl_table_index;
-
- s->dc_table_index = get_bits1(&s->gb);
-
- s->mv_table_index = get_bits1(&s->gb);
- break;
- case 4:
- s->use_skip_mb_code = get_bits1(&s->gb);
-
- if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
- else s->per_mb_rl_table= 0;
-
- if(!s->per_mb_rl_table){
- s->rl_table_index = decode012(&s->gb);
- s->rl_chroma_table_index = s->rl_table_index;
- }
-
- s->dc_table_index = get_bits1(&s->gb);
-
- s->mv_table_index = get_bits1(&s->gb);
- s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
- break;
- }
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_DEBUG, "skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n",
- s->use_skip_mb_code,
- s->rl_table_index,
- s->rl_chroma_table_index,
- s->dc_table_index,
- s->mv_table_index,
- s->per_mb_rl_table,
- s->qscale);
-
- if(s->flipflop_rounding){
- s->no_rounding ^= 1;
- }else{
- s->no_rounding = 0;
- }
- }
-//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
-
- s->esc3_level_length= 0;
- s->esc3_run_length= 0;
-
-#ifdef DEBUG
- av_log(s->avctx, AV_LOG_DEBUG, "*****frame %d:\n", frame_count++);
-#endif
- return 0;
-}
-
-int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size)
-{
- int left= buf_size*8 - get_bits_count(&s->gb);
- int length= s->msmpeg4_version>=3 ? 17 : 16;
- /* the alt_bitstream reader could read over the end so we need to check it */
- if(left>=length && left<length+8)
- {
- int fps;
-
- fps= get_bits(&s->gb, 5);
- s->bit_rate= get_bits(&s->gb, 11)*1024;
- if(s->msmpeg4_version>=3)
- s->flipflop_rounding= get_bits1(&s->gb);
- else
- s->flipflop_rounding= 0;
-
-// printf("fps:%2d bps:%2d roundingType:%1d\n", fps, s->bit_rate/1024, s->flipflop_rounding);
- }
- else if(left<length+8)
- {
- s->flipflop_rounding= 0;
- if(s->msmpeg4_version != 2)
- av_log(s->avctx, AV_LOG_ERROR, "ext header missing, %d left\n", left);
- }
- else
- {
- av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n");
- }
-
- return 0;
-}
-
-static inline void msmpeg4_memsetw(short *tab, int val, int n)
-{
- int i;
- for(i=0;i<n;i++)
- tab[i] = val;
-}
-
-#ifdef CONFIG_ENCODERS
-static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)
-{
- int range, bit_size, sign, code, bits;
-
- if (val == 0) {
- /* zero vector */
- code = 0;
- put_bits(&s->pb, mvtab[code][1], mvtab[code][0]);
- } else {
- bit_size = s->f_code - 1;
- range = 1 << bit_size;
- if (val <= -64)
- val += 64;
- else if (val >= 64)
- val -= 64;
-
- if (val >= 0) {
- sign = 0;
- } else {
- val = -val;
- sign = 1;
- }
- val--;
- code = (val >> bit_size) + 1;
- bits = val & (range - 1);
-
- put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign);
- if (bit_size > 0) {
- put_bits(&s->pb, bit_size, bits);
- }
- }
-}
-#endif
-
-/* this is identical to h263 except that its range is multiplied by 2 */
-static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code)
-{
- int code, val, sign, shift;
-
- code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2);
-// printf("MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred);
- if (code < 0)
- return 0xffff;
-
- if (code == 0)
- return pred;
- sign = get_bits1(&s->gb);
- shift = f_code - 1;
- val = code;
- if (shift) {
- val = (val - 1) << shift;
- val |= get_bits(&s->gb, shift);
- val++;
- }
- if (sign)
- val = -val;
-
- val += pred;
- if (val <= -64)
- val += 64;
- else if (val >= 64)
- val -= 64;
-
- return val;
-}
-
-static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
-{
- int cbp, code, i;
-
- if (s->pict_type == P_TYPE) {
- if (s->use_skip_mb_code) {
- if (get_bits1(&s->gb)) {
- /* skip mb */
- s->mb_intra = 0;
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- s->mb_skipped = 1;
- return 0;
- }
- }
-
- if(s->msmpeg4_version==2)
- code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1);
- else
- code = get_vlc2(&s->gb, v1_inter_cbpc_vlc.table, V1_INTER_CBPC_VLC_BITS, 3);
- if(code<0 || code>7){
- av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y);
- return -1;
- }
-
- s->mb_intra = code >>2;
-
- cbp = code & 0x3;
- } else {
- s->mb_intra = 1;
- if(s->msmpeg4_version==2)
- cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
- else
- cbp= get_vlc2(&s->gb, v1_intra_cbpc_vlc.table, V1_INTRA_CBPC_VLC_BITS, 1);
- if(cbp<0 || cbp>3){
- av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
- return -1;
- }
- }
-
- if (!s->mb_intra) {
- int mx, my, cbpy;
-
- cbpy= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
- if(cbpy<0){
- av_log(s->avctx, AV_LOG_ERROR, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
- return -1;
- }
-
- cbp|= cbpy<<2;
- if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C;
-
- h263_pred_motion(s, 0, 0, &mx, &my);
- mx= msmpeg4v2_decode_motion(s, mx, 1);
- my= msmpeg4v2_decode_motion(s, my, 1);
-
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mv[0][0][0] = mx;
- s->mv[0][0][1] = my;
- } else {
- if(s->msmpeg4_version==2){
- s->ac_pred = get_bits1(&s->gb);
- cbp|= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors
- } else{
- s->ac_pred = 0;
- cbp|= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors
- if(s->pict_type==P_TYPE) cbp^=0x3C;
- }
- }
-
- s->dsp.clear_blocks(s->block[0]);
- for (i = 0; i < 6; i++) {
- if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
- {
- av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
- return -1;
- }
- }
- return 0;
-}
-
-static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
-{
- int cbp, code, i;
- uint8_t *coded_val;
- uint32_t * const mb_type_ptr= &s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ];
-
- if (s->pict_type == P_TYPE) {
- if (s->use_skip_mb_code) {
- if (get_bits1(&s->gb)) {
- /* skip mb */
- s->mb_intra = 0;
- for(i=0;i<6;i++)
- s->block_last_index[i] = -1;
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- s->mb_skipped = 1;
- *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
-
- return 0;
- }
- }
-
- code = get_vlc2(&s->gb, mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3);
- if (code < 0)
- return -1;
- //s->mb_intra = (code & 0x40) ? 0 : 1;
- s->mb_intra = (~code & 0x40) >> 6;
-
- cbp = code & 0x3f;
- } else {
- s->mb_intra = 1;
- code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
- if (code < 0)
- return -1;
- /* predict coded block pattern */
- cbp = 0;
- for(i=0;i<6;i++) {
- int val = ((code >> (5 - i)) & 1);
- if (i < 4) {
- int pred = coded_block_pred(s, i, &coded_val);
- val = val ^ pred;
- *coded_val = val;
- }
- cbp |= val << (5 - i);
- }
- }
-
- if (!s->mb_intra) {
- int mx, my;
-//printf("P at %d %d\n", s->mb_x, s->mb_y);
- if(s->per_mb_rl_table && cbp){
- s->rl_table_index = decode012(&s->gb);
- s->rl_chroma_table_index = s->rl_table_index;
- }
- h263_pred_motion(s, 0, 0, &mx, &my);
- if (msmpeg4_decode_motion(s, &mx, &my) < 0)
- return -1;
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->mv[0][0][0] = mx;
- s->mv[0][0][1] = my;
- *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16;
- } else {
-//printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
- s->ac_pred = get_bits1(&s->gb);
- *mb_type_ptr = MB_TYPE_INTRA;
- if(s->inter_intra_pred){
- s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
-// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
- }
- if(s->per_mb_rl_table && cbp){
- s->rl_table_index = decode012(&s->gb);
- s->rl_chroma_table_index = s->rl_table_index;
- }
- }
-
- s->dsp.clear_blocks(s->block[0]);
- for (i = 0; i < 6; i++) {
- if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
- {
- av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
- return -1;
- }
- }
-
- return 0;
-}
-//#define ERROR_DETAILS
-static inline int msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
- int n, int coded, const uint8_t *scan_table)
-{
- int level, i, last, run, run_diff;
- int dc_pred_dir;
- RLTable *rl;
- RL_VLC_ELEM *rl_vlc;
- int qmul, qadd;
-
- if (s->mb_intra) {
- qmul=1;
- qadd=0;
-
- /* DC coef */
- level = msmpeg4_decode_dc(s, n, &dc_pred_dir);
-
- if (level < 0){
- av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale);
- if(s->inter_intra_pred) level=0;
- else return -1;
- }
- if (n < 4) {
- rl = &rl_table[s->rl_table_index];
- if(level > 256*s->y_dc_scale){
- av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ L qscale: %d//\n", s->qscale);
- if(!s->inter_intra_pred) return -1;
- }
- } else {
- rl = &rl_table[3 + s->rl_chroma_table_index];
- if(level > 256*s->c_dc_scale){
- av_log(s->avctx, AV_LOG_ERROR, "dc overflow+ C qscale: %d//\n", s->qscale);
- if(!s->inter_intra_pred) return -1;
- }
- }
- block[0] = level;
-
- run_diff = 0;
- i = 0;
- if (!coded) {
- goto not_coded;
- }
- if (s->ac_pred) {
- if (dc_pred_dir == 0)
- scan_table = s->intra_v_scantable.permutated; /* left */
- else
- scan_table = s->intra_h_scantable.permutated; /* top */
- } else {
- scan_table = s->intra_scantable.permutated;
- }
- rl_vlc= rl->rl_vlc[0];
- } else {
- qmul = s->qscale << 1;
- qadd = (s->qscale - 1) | 1;
- i = -1;
- rl = &rl_table[3 + s->rl_table_index];
-
- if(s->msmpeg4_version==2)
- run_diff = 0;
- else
- run_diff = 1;
-
- if (!coded) {
- s->block_last_index[n] = i;
- return 0;
- }
- if(!scan_table)
- scan_table = s->inter_scantable.permutated;
- rl_vlc= rl->rl_vlc[s->qscale];
- }
- {
- OPEN_READER(re, &s->gb);
- for(;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
- if (level==0) {
- int cache;
- cache= GET_CACHE(re, &s->gb);
- /* escape */
- if (s->msmpeg4_version==1 || (cache&0x80000000)==0) {
- if (s->msmpeg4_version==1 || (cache&0x40000000)==0) {
- /* third escape */
- if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2);
- UPDATE_CACHE(re, &s->gb);
- if(s->msmpeg4_version<=3){
- last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
- run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6);
- level= SHOW_SBITS(re, &s->gb, 8); LAST_SKIP_CACHE(re, &s->gb, 8);
- SKIP_COUNTER(re, &s->gb, 1+6+8);
- }else{
- int sign;
- last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1);
- if(!s->esc3_level_length){
- int ll;
- //printf("ESC-3 %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
- if(s->qscale<8){
- ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3);
- if(ll==0){
- if(SHOW_UBITS(re, &s->gb, 1)) av_log(s->avctx, AV_LOG_ERROR, "cool a new vlc code ,contact the ffmpeg developers and upload the file\n");
- SKIP_BITS(re, &s->gb, 1);
- ll=8;
- }
- }else{
- ll=2;
- while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){
- ll++;
- SKIP_BITS(re, &s->gb, 1);
- }
- if(ll<8) SKIP_BITS(re, &s->gb, 1);
- }
-
- s->esc3_level_length= ll;
- s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2);
-//printf("level length:%d, run length: %d\n", ll, s->esc3_run_length);
- UPDATE_CACHE(re, &s->gb);
- }
- run= SHOW_UBITS(re, &s->gb, s->esc3_run_length);
- SKIP_BITS(re, &s->gb, s->esc3_run_length);
-
- sign= SHOW_UBITS(re, &s->gb, 1);
- SKIP_BITS(re, &s->gb, 1);
-
- level= SHOW_UBITS(re, &s->gb, s->esc3_level_length);
- SKIP_BITS(re, &s->gb, s->esc3_level_length);
- if(sign) level= -level;
- }
-//printf("level: %d, run: %d at %d %d\n", level, run, s->mb_x, s->mb_y);
-#if 0 // waste of time / this will detect very few errors
- {
- const int abs_level= FFABS(level);
- const int run1= run - rl->max_run[last][abs_level] - run_diff;
- if(abs_level<=MAX_LEVEL && run<=MAX_RUN){
- if(abs_level <= rl->max_level[last][run]){
- av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
- return DECODING_AC_LOST;
- }
- if(abs_level <= rl->max_level[last][run]*2){
- av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
- return DECODING_AC_LOST;
- }
- if(run1>=0 && abs_level <= rl->max_level[last][run1]){
- av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
- return DECODING_AC_LOST;
- }
- }
- }
-#endif
- //level = level * qmul + (level>0) * qadd - (level<=0) * qadd ;
- if (level>0) level= level * qmul + qadd;
- else level= level * qmul - qadd;
-#if 0 // waste of time too :(
- if(level>2048 || level<-2048){
- av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc\n");
- return DECODING_AC_LOST;
- }
-#endif
- i+= run + 1;
- if(last) i+=192;
-#ifdef ERROR_DETAILS
- if(run==66)
- av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC3 level=%d\n", level);
- else if((i>62 && i<192) || i>192+63)
- av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level);
-#endif
- } else {
- /* second escape */
-#if MIN_CACHE_BITS < 23
- LAST_SKIP_BITS(re, &s->gb, 2);
- UPDATE_CACHE(re, &s->gb);
-#else
- SKIP_BITS(re, &s->gb, 2);
-#endif
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
- i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
-#ifdef ERROR_DETAILS
- if(run==66)
- av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC2 level=%d\n", level);
- else if((i>62 && i<192) || i>192+63)
- av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level);
-#endif
- }
- } else {
- /* first escape */
-#if MIN_CACHE_BITS < 22
- LAST_SKIP_BITS(re, &s->gb, 1);
- UPDATE_CACHE(re, &s->gb);
-#else
- SKIP_BITS(re, &s->gb, 1);
-#endif
- GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
- i+= run;
- level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
-#ifdef ERROR_DETAILS
- if(run==66)
- av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code in ESC1 level=%d\n", level);
- else if((i>62 && i<192) || i>192+63)
- av_log(s->avctx, AV_LOG_ERROR, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level);
-#endif
- }
- } else {
- i+= run;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
-#ifdef ERROR_DETAILS
- if(run==66)
- av_log(s->avctx, AV_LOG_ERROR, "illegal vlc code level=%d\n", level);
- else if((i>62 && i<192) || i>192+63)
- av_log(s->avctx, AV_LOG_ERROR, "run overflow i=%d run=%d level=%d\n", i, run, level);
-#endif
- }
- if (i > 62){
- i-= 192;
- if(i&(~63)){
- const int left= s->gb.size_in_bits - get_bits_count(&s->gb);
- if(((i+192 == 64 && level/qmul==-1) || s->error_resilience<=1) && left>=0){
- av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y);
- break;
- }else{
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- }
-
- block[scan_table[i]] = level;
- break;
- }
-
- block[scan_table[i]] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- not_coded:
- if (s->mb_intra) {
- mpeg4_pred_ac(s, block, n, dc_pred_dir);
- if (s->ac_pred) {
- i = 63; /* XXX: not optimal */
- }
- }
- if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize
- s->block_last_index[n] = i;
-
- return 0;
-}
-
-static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
-{
- int level, pred;
-
- if(s->msmpeg4_version<=2){
- if (n < 4) {
- level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3);
- } else {
- level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3);
- }
- if (level < 0)
- return -1;
- level-=256;
- }else{ //FIXME optimize use unified tables & index
- if (n < 4) {
- level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
- } else {
- level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
- }
- if (level < 0){
- av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
- return -1;
- }
-
- if (level == DC_MAX) {
- level = get_bits(&s->gb, 8);
- if (get_bits1(&s->gb))
- level = -level;
- } else if (level != 0) {
- if (get_bits1(&s->gb))
- level = -level;
- }
- }
-
- if(s->msmpeg4_version==1){
- int32_t *dc_val;
- pred = msmpeg4v1_pred_dc(s, n, &dc_val);
- level += pred;
-
- /* update predictor */
- *dc_val= level;
- }else{
- int16_t *dc_val;
- pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
- level += pred;
-
- /* update predictor */
- if (n < 4) {
- *dc_val = level * s->y_dc_scale;
- } else {
- *dc_val = level * s->c_dc_scale;
- }
- }
-
- return level;
-}
-
-static int msmpeg4_decode_motion(MpegEncContext * s,
- int *mx_ptr, int *my_ptr)
-{
- MVTable *mv;
- int code, mx, my;
-
- mv = &mv_tables[s->mv_table_index];
-
- code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2);
- if (code < 0){
- av_log(s->avctx, AV_LOG_ERROR, "illegal MV code at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- if (code == mv->n) {
-//printf("MV ESC %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
- mx = get_bits(&s->gb, 6);
- my = get_bits(&s->gb, 6);
- } else {
- mx = mv->table_mvx[code];
- my = mv->table_mvy[code];
- }
-
- mx += *mx_ptr - 32;
- my += *my_ptr - 32;
- /* WARNING : they do not do exactly modulo encoding */
- if (mx <= -64)
- mx += 64;
- else if (mx >= 64)
- mx -= 64;
-
- if (my <= -64)
- my += 64;
- else if (my >= 64)
- my -= 64;
- *mx_ptr = mx;
- *my_ptr = my;
- return 0;
-}
-
-/* cleanest way to support it
- * there is too much shared between versions so that we cant have 1 file per version & 1 common
- * as allmost everything would be in the common file
- */
-#include "wmv2.c"
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 13:57:55 +0000