ffmpeg / libavcodec / msmpeg4.c @ 983e3246
History | View | Annotate | Download (60.1 KB)
| 1 |
/*
|
|---|---|
| 2 |
* MSMPEG4 backend for ffmpeg encoder and decoder
|
| 3 |
* Copyright (c) 2001 Fabrice Bellard.
|
| 4 |
*
|
| 5 |
* This library is free software; you can redistribute it and/or
|
| 6 |
* modify it under the terms of the GNU Lesser General Public
|
| 7 |
* License as published by the Free Software Foundation; either
|
| 8 |
* version 2 of the License, or (at your option) any later version.
|
| 9 |
*
|
| 10 |
* This library is distributed in the hope that it will be useful,
|
| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 13 |
* Lesser General Public License for more details.
|
| 14 |
*
|
| 15 |
* You should have received a copy of the GNU Lesser General Public
|
| 16 |
* License along with this library; if not, write to the Free Software
|
| 17 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 18 |
*
|
| 19 |
* msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>
|
| 20 |
*/
|
| 21 |
|
| 22 |
/**
|
| 23 |
* @file msmpeg4.c
|
| 24 |
* MSMPEG4 backend for ffmpeg encoder and decoder.
|
| 25 |
*/
|
| 26 |
|
| 27 |
#include "avcodec.h" |
| 28 |
#include "dsputil.h" |
| 29 |
#include "mpegvideo.h" |
| 30 |
//#define PRINT_MB
|
| 31 |
|
| 32 |
/*
|
| 33 |
* You can also call this codec : MPEG4 with a twist !
|
| 34 |
*
|
| 35 |
* TODO:
|
| 36 |
* - (encoding) select best mv table (two choices)
|
| 37 |
* - (encoding) select best vlc/dc table
|
| 38 |
*/
|
| 39 |
//#define DEBUG
|
| 40 |
|
| 41 |
#define DC_VLC_BITS 9 |
| 42 |
#define CBPY_VLC_BITS 6 |
| 43 |
#define INTER_INTRA_VLC_BITS 3 |
| 44 |
#define V1_INTRA_CBPC_VLC_BITS 6 |
| 45 |
#define V1_INTER_CBPC_VLC_BITS 6 |
| 46 |
#define V2_INTRA_CBPC_VLC_BITS 3 |
| 47 |
#define V2_MB_TYPE_VLC_BITS 7 |
| 48 |
#define MV_VLC_BITS 9 |
| 49 |
#define V2_MV_VLC_BITS 9 |
| 50 |
#define TEX_VLC_BITS 9 |
| 51 |
#define MB_NON_INTRA_VLC_BITS 9 |
| 52 |
#define MB_INTRA_VLC_BITS 9 |
| 53 |
|
| 54 |
#define II_BITRATE 128*1024 |
| 55 |
#define MBAC_BITRATE 50*1024 |
| 56 |
|
| 57 |
#define DEFAULT_INTER_INDEX 3 |
| 58 |
|
| 59 |
static uint32_t v2_dc_lum_table[512][2]; |
| 60 |
static uint32_t v2_dc_chroma_table[512][2]; |
| 61 |
|
| 62 |
#ifdef CONFIG_ENCODERS
|
| 63 |
static inline void msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n); |
| 64 |
#endif //CONFIG_ENCODERS |
| 65 |
static inline int msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block, |
| 66 |
int n, int coded, const uint8_t *scantable); |
| 67 |
static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr); |
| 68 |
static int msmpeg4_decode_motion(MpegEncContext * s, |
| 69 |
int *mx_ptr, int *my_ptr); |
| 70 |
#ifdef CONFIG_ENCODERS
|
| 71 |
static void msmpeg4v2_encode_motion(MpegEncContext * s, int val); |
| 72 |
#endif //CONFIG_ENCODERS |
| 73 |
static void init_h263_dc_for_msmpeg4(void); |
| 74 |
static inline void msmpeg4_memsetw(short *tab, int val, int n); |
| 75 |
#ifdef CONFIG_ENCODERS
|
| 76 |
static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra); |
| 77 |
#endif //CONFIG_ENCODERS |
| 78 |
static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]); |
| 79 |
static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]); |
| 80 |
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64]); |
| 81 |
|
| 82 |
extern uint32_t inverse[256]; |
| 83 |
|
| 84 |
|
| 85 |
#ifdef DEBUG
|
| 86 |
int intra_count = 0; |
| 87 |
int frame_count = 0; |
| 88 |
#endif
|
| 89 |
|
| 90 |
#include "msmpeg4data.h" |
| 91 |
|
| 92 |
static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]; |
| 93 |
|
| 94 |
#ifdef STATS
|
| 95 |
|
| 96 |
const char *st_names[ST_NB] = { |
| 97 |
"unknown",
|
| 98 |
"dc",
|
| 99 |
"intra_ac",
|
| 100 |
"inter_ac",
|
| 101 |
"intra_mb",
|
| 102 |
"inter_mb",
|
| 103 |
"mv",
|
| 104 |
}; |
| 105 |
|
| 106 |
int st_current_index = 0; |
| 107 |
unsigned int st_bit_counts[ST_NB]; |
| 108 |
unsigned int st_out_bit_counts[ST_NB]; |
| 109 |
|
| 110 |
#define set_stat(var) st_current_index = var;
|
| 111 |
|
| 112 |
void print_stats(void) |
| 113 |
{
|
| 114 |
unsigned int total; |
| 115 |
int i;
|
| 116 |
|
| 117 |
printf("Input:\n");
|
| 118 |
total = 0;
|
| 119 |
for(i=0;i<ST_NB;i++) |
| 120 |
total += st_bit_counts[i]; |
| 121 |
if (total == 0) |
| 122 |
total = 1;
|
| 123 |
for(i=0;i<ST_NB;i++) { |
| 124 |
printf("%-10s : %10.1f %5.1f%%\n",
|
| 125 |
st_names[i], |
| 126 |
(double)st_bit_counts[i] / 8.0, |
| 127 |
(double)st_bit_counts[i] * 100.0 / total); |
| 128 |
} |
| 129 |
printf("%-10s : %10.1f %5.1f%%\n",
|
| 130 |
"total",
|
| 131 |
(double)total / 8.0, |
| 132 |
100.0); |
| 133 |
|
| 134 |
printf("Output:\n");
|
| 135 |
total = 0;
|
| 136 |
for(i=0;i<ST_NB;i++) |
| 137 |
total += st_out_bit_counts[i]; |
| 138 |
if (total == 0) |
| 139 |
total = 1;
|
| 140 |
for(i=0;i<ST_NB;i++) { |
| 141 |
printf("%-10s : %10.1f %5.1f%%\n",
|
| 142 |
st_names[i], |
| 143 |
(double)st_out_bit_counts[i] / 8.0, |
| 144 |
(double)st_out_bit_counts[i] * 100.0 / total); |
| 145 |
} |
| 146 |
printf("%-10s : %10.1f %5.1f%%\n",
|
| 147 |
"total",
|
| 148 |
(double)total / 8.0, |
| 149 |
100.0); |
| 150 |
} |
| 151 |
|
| 152 |
#else
|
| 153 |
|
| 154 |
#define set_stat(var)
|
| 155 |
|
| 156 |
#endif
|
| 157 |
|
| 158 |
static void common_init(MpegEncContext * s) |
| 159 |
{
|
| 160 |
static int inited=0; |
| 161 |
|
| 162 |
switch(s->msmpeg4_version){
|
| 163 |
case 1: |
| 164 |
case 2: |
| 165 |
s->y_dc_scale_table= |
| 166 |
s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
| 167 |
break;
|
| 168 |
case 3: |
| 169 |
if(s->workaround_bugs){
|
| 170 |
s->y_dc_scale_table= old_ff_y_dc_scale_table; |
| 171 |
s->c_dc_scale_table= old_ff_c_dc_scale_table; |
| 172 |
} else{
|
| 173 |
s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; |
| 174 |
s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; |
| 175 |
} |
| 176 |
break;
|
| 177 |
case 4: |
| 178 |
case 5: |
| 179 |
s->y_dc_scale_table= wmv1_y_dc_scale_table; |
| 180 |
s->c_dc_scale_table= wmv1_c_dc_scale_table; |
| 181 |
break;
|
| 182 |
} |
| 183 |
|
| 184 |
|
| 185 |
if(s->msmpeg4_version>=4){ |
| 186 |
ff_init_scantable(s, &s->intra_scantable , wmv1_scantable[1]);
|
| 187 |
ff_init_scantable(s, &s->intra_h_scantable, wmv1_scantable[2]);
|
| 188 |
ff_init_scantable(s, &s->intra_v_scantable, wmv1_scantable[3]);
|
| 189 |
ff_init_scantable(s, &s->inter_scantable , wmv1_scantable[0]);
|
| 190 |
} |
| 191 |
//Note the default tables are set in common_init in mpegvideo.c
|
| 192 |
|
| 193 |
if(!inited){
|
| 194 |
inited=1;
|
| 195 |
|
| 196 |
init_h263_dc_for_msmpeg4(); |
| 197 |
} |
| 198 |
} |
| 199 |
|
| 200 |
#ifdef CONFIG_ENCODERS
|
| 201 |
|
| 202 |
/* build the table which associate a (x,y) motion vector to a vlc */
|
| 203 |
static void init_mv_table(MVTable *tab) |
| 204 |
{
|
| 205 |
int i, x, y;
|
| 206 |
|
| 207 |
tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096); |
| 208 |
/* mark all entries as not used */
|
| 209 |
for(i=0;i<4096;i++) |
| 210 |
tab->table_mv_index[i] = tab->n; |
| 211 |
|
| 212 |
for(i=0;i<tab->n;i++) { |
| 213 |
x = tab->table_mvx[i]; |
| 214 |
y = tab->table_mvy[i]; |
| 215 |
tab->table_mv_index[(x << 6) | y] = i;
|
| 216 |
} |
| 217 |
} |
| 218 |
|
| 219 |
static void code012(PutBitContext *pb, int n) |
| 220 |
{
|
| 221 |
if (n == 0) { |
| 222 |
put_bits(pb, 1, 0); |
| 223 |
} else {
|
| 224 |
put_bits(pb, 1, 1); |
| 225 |
put_bits(pb, 1, (n >= 2)); |
| 226 |
} |
| 227 |
} |
| 228 |
|
| 229 |
void ff_msmpeg4_encode_init(MpegEncContext *s)
|
| 230 |
{
|
| 231 |
static int init_done=0; |
| 232 |
int i;
|
| 233 |
|
| 234 |
common_init(s); |
| 235 |
if(s->msmpeg4_version>=4){ |
| 236 |
s->min_qcoeff= -255;
|
| 237 |
s->max_qcoeff= 255;
|
| 238 |
} |
| 239 |
|
| 240 |
if (!init_done) {
|
| 241 |
/* init various encoding tables */
|
| 242 |
init_done = 1;
|
| 243 |
init_mv_table(&mv_tables[0]);
|
| 244 |
init_mv_table(&mv_tables[1]);
|
| 245 |
for(i=0;i<NB_RL_TABLES;i++) |
| 246 |
init_rl(&rl_table[i]); |
| 247 |
|
| 248 |
for(i=0; i<NB_RL_TABLES; i++){ |
| 249 |
int level;
|
| 250 |
for(level=0; level<=MAX_LEVEL; level++){ |
| 251 |
int run;
|
| 252 |
for(run=0; run<=MAX_RUN; run++){ |
| 253 |
int last;
|
| 254 |
for(last=0; last<2; last++){ |
| 255 |
rl_length[i][level][run][last]= get_size_of_code(s, &rl_table[ i], last, run, level, 0);
|
| 256 |
} |
| 257 |
} |
| 258 |
} |
| 259 |
} |
| 260 |
} |
| 261 |
} |
| 262 |
|
| 263 |
static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){ |
| 264 |
int size=0; |
| 265 |
int code;
|
| 266 |
int run_diff= intra ? 0 : 1; |
| 267 |
|
| 268 |
code = get_rl_index(rl, last, run, level); |
| 269 |
size+= rl->table_vlc[code][1];
|
| 270 |
if (code == rl->n) {
|
| 271 |
int level1, run1;
|
| 272 |
|
| 273 |
level1 = level - rl->max_level[last][run]; |
| 274 |
if (level1 < 1) |
| 275 |
goto esc2;
|
| 276 |
code = get_rl_index(rl, last, run, level1); |
| 277 |
if (code == rl->n) {
|
| 278 |
esc2:
|
| 279 |
size++; |
| 280 |
if (level > MAX_LEVEL)
|
| 281 |
goto esc3;
|
| 282 |
run1 = run - rl->max_run[last][level] - run_diff; |
| 283 |
if (run1 < 0) |
| 284 |
goto esc3;
|
| 285 |
code = get_rl_index(rl, last, run1, level); |
| 286 |
if (code == rl->n) {
|
| 287 |
esc3:
|
| 288 |
/* third escape */
|
| 289 |
size+=1+1+6+8; |
| 290 |
} else {
|
| 291 |
/* second escape */
|
| 292 |
size+= 1+1+ rl->table_vlc[code][1]; |
| 293 |
} |
| 294 |
} else {
|
| 295 |
/* first escape */
|
| 296 |
size+= 1+1+ rl->table_vlc[code][1]; |
| 297 |
} |
| 298 |
} else {
|
| 299 |
size++; |
| 300 |
} |
| 301 |
return size;
|
| 302 |
} |
| 303 |
|
| 304 |
static void find_best_tables(MpegEncContext * s) |
| 305 |
{
|
| 306 |
int i;
|
| 307 |
int best =-1, best_size =9999999; |
| 308 |
int chroma_best=-1, best_chroma_size=9999999; |
| 309 |
|
| 310 |
for(i=0; i<3; i++){ |
| 311 |
int level;
|
| 312 |
int chroma_size=0; |
| 313 |
int size=0; |
| 314 |
|
| 315 |
if(i>0){// ;) |
| 316 |
size++; |
| 317 |
chroma_size++; |
| 318 |
} |
| 319 |
for(level=0; level<=MAX_LEVEL; level++){ |
| 320 |
int run;
|
| 321 |
for(run=0; run<=MAX_RUN; run++){ |
| 322 |
int last;
|
| 323 |
const int last_size= size + chroma_size; |
| 324 |
for(last=0; last<2; last++){ |
| 325 |
int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last]; |
| 326 |
int intra_luma_count = s->ac_stats[1][0][level][run][last]; |
| 327 |
int intra_chroma_count= s->ac_stats[1][1][level][run][last]; |
| 328 |
|
| 329 |
if(s->pict_type==I_TYPE){
|
| 330 |
size += intra_luma_count *rl_length[i ][level][run][last]; |
| 331 |
chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];
|
| 332 |
}else{
|
| 333 |
size+= intra_luma_count *rl_length[i ][level][run][last] |
| 334 |
+intra_chroma_count*rl_length[i+3][level][run][last]
|
| 335 |
+inter_count *rl_length[i+3][level][run][last];
|
| 336 |
} |
| 337 |
} |
| 338 |
if(last_size == size+chroma_size) break; |
| 339 |
} |
| 340 |
} |
| 341 |
if(size<best_size){
|
| 342 |
best_size= size; |
| 343 |
best= i; |
| 344 |
} |
| 345 |
if(chroma_size<best_chroma_size){
|
| 346 |
best_chroma_size= chroma_size; |
| 347 |
chroma_best= i; |
| 348 |
} |
| 349 |
} |
| 350 |
|
| 351 |
// printf("type:%d, best:%d, qp:%d, var:%d, mcvar:%d, size:%d //\n",
|
| 352 |
// s->pict_type, best, s->qscale, s->mb_var_sum, s->mc_mb_var_sum, best_size);
|
| 353 |
|
| 354 |
if(s->pict_type==P_TYPE) chroma_best= best;
|
| 355 |
|
| 356 |
memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2); |
| 357 |
|
| 358 |
s->rl_table_index = best; |
| 359 |
s->rl_chroma_table_index= chroma_best; |
| 360 |
|
| 361 |
if(s->pict_type != s->last_non_b_pict_type){
|
| 362 |
s->rl_table_index= 2;
|
| 363 |
if(s->pict_type==I_TYPE)
|
| 364 |
s->rl_chroma_table_index= 1;
|
| 365 |
else
|
| 366 |
s->rl_chroma_table_index= 2;
|
| 367 |
} |
| 368 |
|
| 369 |
} |
| 370 |
|
| 371 |
/* write MSMPEG4 compatible frame header */
|
| 372 |
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number) |
| 373 |
{
|
| 374 |
find_best_tables(s); |
| 375 |
|
| 376 |
align_put_bits(&s->pb); |
| 377 |
put_bits(&s->pb, 2, s->pict_type - 1); |
| 378 |
|
| 379 |
put_bits(&s->pb, 5, s->qscale);
|
| 380 |
if(s->msmpeg4_version<=2){ |
| 381 |
s->rl_table_index = 2;
|
| 382 |
s->rl_chroma_table_index = 2;
|
| 383 |
} |
| 384 |
|
| 385 |
s->dc_table_index = 1;
|
| 386 |
s->mv_table_index = 1; /* only if P frame */ |
| 387 |
s->use_skip_mb_code = 1; /* only if P frame */ |
| 388 |
s->per_mb_rl_table = 0;
|
| 389 |
if(s->msmpeg4_version==4) |
| 390 |
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==P_TYPE); |
| 391 |
//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
|
| 392 |
|
| 393 |
if (s->pict_type == I_TYPE) {
|
| 394 |
s->slice_height= s->mb_height/1;
|
| 395 |
put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height); |
| 396 |
|
| 397 |
if(s->msmpeg4_version==4){ |
| 398 |
msmpeg4_encode_ext_header(s); |
| 399 |
if(s->bit_rate>MBAC_BITRATE)
|
| 400 |
put_bits(&s->pb, 1, s->per_mb_rl_table);
|
| 401 |
} |
| 402 |
|
| 403 |
if(s->msmpeg4_version>2){ |
| 404 |
if(!s->per_mb_rl_table){
|
| 405 |
code012(&s->pb, s->rl_chroma_table_index); |
| 406 |
code012(&s->pb, s->rl_table_index); |
| 407 |
} |
| 408 |
|
| 409 |
put_bits(&s->pb, 1, s->dc_table_index);
|
| 410 |
} |
| 411 |
} else {
|
| 412 |
put_bits(&s->pb, 1, s->use_skip_mb_code);
|
| 413 |
|
| 414 |
if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE) |
| 415 |
put_bits(&s->pb, 1, s->per_mb_rl_table);
|
| 416 |
|
| 417 |
if(s->msmpeg4_version>2){ |
| 418 |
if(!s->per_mb_rl_table)
|
| 419 |
code012(&s->pb, s->rl_table_index); |
| 420 |
|
| 421 |
put_bits(&s->pb, 1, s->dc_table_index);
|
| 422 |
|
| 423 |
put_bits(&s->pb, 1, s->mv_table_index);
|
| 424 |
} |
| 425 |
} |
| 426 |
|
| 427 |
s->esc3_level_length= 0;
|
| 428 |
s->esc3_run_length= 0;
|
| 429 |
|
| 430 |
#ifdef DEBUG
|
| 431 |
intra_count = 0;
|
| 432 |
printf("*****frame %d:\n", frame_count++);
|
| 433 |
#endif
|
| 434 |
} |
| 435 |
|
| 436 |
void msmpeg4_encode_ext_header(MpegEncContext * s)
|
| 437 |
{
|
| 438 |
put_bits(&s->pb, 5, s->frame_rate / FRAME_RATE_BASE); //yes 29.97 -> 29 |
| 439 |
|
| 440 |
put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047)); |
| 441 |
|
| 442 |
if(s->msmpeg4_version<3) |
| 443 |
s->flipflop_rounding=0;
|
| 444 |
else{
|
| 445 |
s->flipflop_rounding=1;
|
| 446 |
put_bits(&s->pb, 1, s->flipflop_rounding);
|
| 447 |
} |
| 448 |
} |
| 449 |
|
| 450 |
#endif //CONFIG_ENCODERS |
| 451 |
|
| 452 |
/* predict coded block */
|
| 453 |
static inline int coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr) |
| 454 |
{
|
| 455 |
int xy, wrap, pred, a, b, c;
|
| 456 |
|
| 457 |
xy = s->block_index[n]; |
| 458 |
wrap = s->block_wrap[0];
|
| 459 |
|
| 460 |
/* B C
|
| 461 |
* A X
|
| 462 |
*/
|
| 463 |
a = s->coded_block[xy - 1 ];
|
| 464 |
b = s->coded_block[xy - 1 - wrap];
|
| 465 |
c = s->coded_block[xy - wrap]; |
| 466 |
|
| 467 |
if (b == c) {
|
| 468 |
pred = a; |
| 469 |
} else {
|
| 470 |
pred = c; |
| 471 |
} |
| 472 |
|
| 473 |
/* store value */
|
| 474 |
*coded_block_ptr = &s->coded_block[xy]; |
| 475 |
|
| 476 |
return pred;
|
| 477 |
} |
| 478 |
|
| 479 |
#ifdef CONFIG_ENCODERS
|
| 480 |
|
| 481 |
static void msmpeg4_encode_motion(MpegEncContext * s, |
| 482 |
int mx, int my) |
| 483 |
{
|
| 484 |
int code;
|
| 485 |
MVTable *mv; |
| 486 |
|
| 487 |
/* modulo encoding */
|
| 488 |
/* WARNING : you cannot reach all the MVs even with the modulo
|
| 489 |
encoding. This is a somewhat strange compromise they took !!! */
|
| 490 |
if (mx <= -64) |
| 491 |
mx += 64;
|
| 492 |
else if (mx >= 64) |
| 493 |
mx -= 64;
|
| 494 |
if (my <= -64) |
| 495 |
my += 64;
|
| 496 |
else if (my >= 64) |
| 497 |
my -= 64;
|
| 498 |
|
| 499 |
mx += 32;
|
| 500 |
my += 32;
|
| 501 |
#if 0
|
| 502 |
if ((unsigned)mx >= 64 ||
|
| 503 |
(unsigned)my >= 64)
|
| 504 |
fprintf(stderr, "error mx=%d my=%d\n", mx, my);
|
| 505 |
#endif
|
| 506 |
mv = &mv_tables[s->mv_table_index]; |
| 507 |
|
| 508 |
code = mv->table_mv_index[(mx << 6) | my];
|
| 509 |
set_stat(ST_MV); |
| 510 |
put_bits(&s->pb, |
| 511 |
mv->table_mv_bits[code], |
| 512 |
mv->table_mv_code[code]); |
| 513 |
if (code == mv->n) {
|
| 514 |
/* escape : code litterally */
|
| 515 |
put_bits(&s->pb, 6, mx);
|
| 516 |
put_bits(&s->pb, 6, my);
|
| 517 |
} |
| 518 |
} |
| 519 |
|
| 520 |
static inline void handle_slices(MpegEncContext *s){ |
| 521 |
if (s->mb_x == 0) { |
| 522 |
if (s->slice_height && (s->mb_y % s->slice_height) == 0) { |
| 523 |
if(s->msmpeg4_version < 4){ |
| 524 |
ff_mpeg4_clean_buffers(s); |
| 525 |
} |
| 526 |
s->first_slice_line = 1;
|
| 527 |
} else {
|
| 528 |
s->first_slice_line = 0;
|
| 529 |
} |
| 530 |
} |
| 531 |
} |
| 532 |
|
| 533 |
void msmpeg4_encode_mb(MpegEncContext * s,
|
| 534 |
DCTELEM block[6][64], |
| 535 |
int motion_x, int motion_y) |
| 536 |
{
|
| 537 |
int cbp, coded_cbp, i;
|
| 538 |
int pred_x, pred_y;
|
| 539 |
uint8_t *coded_block; |
| 540 |
|
| 541 |
handle_slices(s); |
| 542 |
|
| 543 |
if (!s->mb_intra) {
|
| 544 |
/* compute cbp */
|
| 545 |
set_stat(ST_INTER_MB); |
| 546 |
cbp = 0;
|
| 547 |
for (i = 0; i < 6; i++) { |
| 548 |
if (s->block_last_index[i] >= 0) |
| 549 |
cbp |= 1 << (5 - i); |
| 550 |
} |
| 551 |
if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) { |
| 552 |
/* skip macroblock */
|
| 553 |
put_bits(&s->pb, 1, 1); |
| 554 |
return;
|
| 555 |
} |
| 556 |
if (s->use_skip_mb_code)
|
| 557 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 558 |
|
| 559 |
if(s->msmpeg4_version<=2){ |
| 560 |
put_bits(&s->pb, |
| 561 |
v2_mb_type[cbp&3][1], |
| 562 |
v2_mb_type[cbp&3][0]); |
| 563 |
if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C; |
| 564 |
else coded_cbp= cbp;
|
| 565 |
|
| 566 |
put_bits(&s->pb, |
| 567 |
cbpy_tab[coded_cbp>>2][1], |
| 568 |
cbpy_tab[coded_cbp>>2][0]); |
| 569 |
|
| 570 |
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
| 571 |
msmpeg4v2_encode_motion(s, motion_x - pred_x); |
| 572 |
msmpeg4v2_encode_motion(s, motion_y - pred_y); |
| 573 |
}else{
|
| 574 |
put_bits(&s->pb, |
| 575 |
table_mb_non_intra[cbp + 64][1], |
| 576 |
table_mb_non_intra[cbp + 64][0]); |
| 577 |
|
| 578 |
/* motion vector */
|
| 579 |
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
| 580 |
msmpeg4_encode_motion(s, motion_x - pred_x, |
| 581 |
motion_y - pred_y); |
| 582 |
} |
| 583 |
} else {
|
| 584 |
/* compute cbp */
|
| 585 |
cbp = 0;
|
| 586 |
coded_cbp = 0;
|
| 587 |
for (i = 0; i < 6; i++) { |
| 588 |
int val, pred;
|
| 589 |
val = (s->block_last_index[i] >= 1);
|
| 590 |
cbp |= val << (5 - i);
|
| 591 |
if (i < 4) { |
| 592 |
/* predict value for close blocks only for luma */
|
| 593 |
pred = coded_block_pred(s, i, &coded_block); |
| 594 |
*coded_block = val; |
| 595 |
val = val ^ pred; |
| 596 |
} |
| 597 |
coded_cbp |= val << (5 - i);
|
| 598 |
} |
| 599 |
#if 0
|
| 600 |
if (coded_cbp)
|
| 601 |
printf("cbp=%x %x\n", cbp, coded_cbp);
|
| 602 |
#endif
|
| 603 |
|
| 604 |
if(s->msmpeg4_version<=2){ |
| 605 |
if (s->pict_type == I_TYPE) {
|
| 606 |
put_bits(&s->pb, |
| 607 |
v2_intra_cbpc[cbp&3][1], v2_intra_cbpc[cbp&3][0]); |
| 608 |
} else {
|
| 609 |
if (s->use_skip_mb_code)
|
| 610 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 611 |
put_bits(&s->pb, |
| 612 |
v2_mb_type[(cbp&3) + 4][1], |
| 613 |
v2_mb_type[(cbp&3) + 4][0]); |
| 614 |
} |
| 615 |
put_bits(&s->pb, 1, 0); /* no AC prediction yet */ |
| 616 |
put_bits(&s->pb, |
| 617 |
cbpy_tab[cbp>>2][1], |
| 618 |
cbpy_tab[cbp>>2][0]); |
| 619 |
}else{
|
| 620 |
if (s->pict_type == I_TYPE) {
|
| 621 |
set_stat(ST_INTRA_MB); |
| 622 |
put_bits(&s->pb, |
| 623 |
table_mb_intra[coded_cbp][1], table_mb_intra[coded_cbp][0]); |
| 624 |
} else {
|
| 625 |
if (s->use_skip_mb_code)
|
| 626 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 627 |
put_bits(&s->pb, |
| 628 |
table_mb_non_intra[cbp][1],
|
| 629 |
table_mb_non_intra[cbp][0]);
|
| 630 |
} |
| 631 |
set_stat(ST_INTRA_MB); |
| 632 |
put_bits(&s->pb, 1, 0); /* no AC prediction yet */ |
| 633 |
if(s->inter_intra_pred){
|
| 634 |
s->h263_aic_dir=0;
|
| 635 |
put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]); |
| 636 |
} |
| 637 |
} |
| 638 |
} |
| 639 |
|
| 640 |
for (i = 0; i < 6; i++) { |
| 641 |
msmpeg4_encode_block(s, block[i], i); |
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
#endif //CONFIG_ENCODERS |
| 646 |
|
| 647 |
/* old ffmpeg msmpeg4v3 mode */
|
| 648 |
static void ff_old_msmpeg4_dc_scale(MpegEncContext * s) |
| 649 |
{
|
| 650 |
if (s->qscale < 5){ |
| 651 |
s->y_dc_scale = 8;
|
| 652 |
s->c_dc_scale = 8;
|
| 653 |
}else if (s->qscale < 9){ |
| 654 |
s->y_dc_scale = 2 * s->qscale;
|
| 655 |
s->c_dc_scale = (s->qscale + 13)>>1; |
| 656 |
}else{
|
| 657 |
s->y_dc_scale = s->qscale + 8;
|
| 658 |
s->c_dc_scale = (s->qscale + 13)>>1; |
| 659 |
} |
| 660 |
} |
| 661 |
|
| 662 |
static inline int msmpeg4v1_pred_dc(MpegEncContext * s, int n, |
| 663 |
int32_t **dc_val_ptr) |
| 664 |
{
|
| 665 |
int i;
|
| 666 |
|
| 667 |
if (n < 4) { |
| 668 |
i= 0;
|
| 669 |
} else {
|
| 670 |
i= n-3;
|
| 671 |
} |
| 672 |
|
| 673 |
*dc_val_ptr= &s->last_dc[i]; |
| 674 |
return s->last_dc[i];
|
| 675 |
} |
| 676 |
|
| 677 |
static int get_dc(uint8_t *src, int stride, int scale) |
| 678 |
{
|
| 679 |
int y;
|
| 680 |
int sum=0; |
| 681 |
for(y=0; y<8; y++){ |
| 682 |
int x;
|
| 683 |
for(x=0; x<8; x++){ |
| 684 |
sum+=src[x + y*stride]; |
| 685 |
} |
| 686 |
} |
| 687 |
return (sum + (scale>>1))/scale; |
| 688 |
} |
| 689 |
|
| 690 |
/* dir = 0: left, dir = 1: top prediction */
|
| 691 |
static inline int msmpeg4_pred_dc(MpegEncContext * s, int n, |
| 692 |
uint16_t **dc_val_ptr, int *dir_ptr)
|
| 693 |
{
|
| 694 |
int a, b, c, wrap, pred, scale;
|
| 695 |
int16_t *dc_val; |
| 696 |
|
| 697 |
/* find prediction */
|
| 698 |
if (n < 4) { |
| 699 |
scale = s->y_dc_scale; |
| 700 |
} else {
|
| 701 |
scale = s->c_dc_scale; |
| 702 |
} |
| 703 |
|
| 704 |
wrap = s->block_wrap[n]; |
| 705 |
dc_val= s->dc_val[0] + s->block_index[n];
|
| 706 |
|
| 707 |
/* B C
|
| 708 |
* A X
|
| 709 |
*/
|
| 710 |
a = dc_val[ - 1];
|
| 711 |
b = dc_val[ - 1 - wrap];
|
| 712 |
c = dc_val[ - wrap]; |
| 713 |
|
| 714 |
if(s->first_slice_line && (n&2)==0 && s->msmpeg4_version<4){ |
| 715 |
b=c=1024;
|
| 716 |
} |
| 717 |
|
| 718 |
/* XXX: the following solution consumes divisions, but it does not
|
| 719 |
necessitate to modify mpegvideo.c. The problem comes from the
|
| 720 |
fact they decided to store the quantized DC (which would lead
|
| 721 |
to problems if Q could vary !) */
|
| 722 |
#if defined ARCH_X86 && !defined PIC
|
| 723 |
asm volatile( |
| 724 |
"movl %3, %%eax \n\t"
|
| 725 |
"shrl $1, %%eax \n\t"
|
| 726 |
"addl %%eax, %2 \n\t"
|
| 727 |
"addl %%eax, %1 \n\t"
|
| 728 |
"addl %0, %%eax \n\t"
|
| 729 |
"mull %4 \n\t"
|
| 730 |
"movl %%edx, %0 \n\t"
|
| 731 |
"movl %1, %%eax \n\t"
|
| 732 |
"mull %4 \n\t"
|
| 733 |
"movl %%edx, %1 \n\t"
|
| 734 |
"movl %2, %%eax \n\t"
|
| 735 |
"mull %4 \n\t"
|
| 736 |
"movl %%edx, %2 \n\t"
|
| 737 |
: "+b" (a), "+c" (b), "+D" (c) |
| 738 |
: "g" (scale), "S" (inverse[scale]) |
| 739 |
: "%eax", "%edx" |
| 740 |
); |
| 741 |
#else
|
| 742 |
/* #elif defined (ARCH_ALPHA) */
|
| 743 |
/* Divisions are extremely costly on Alpha; optimize the most
|
| 744 |
common case. But they are costly everywhere...
|
| 745 |
*/
|
| 746 |
if (scale == 8) { |
| 747 |
a = (a + (8 >> 1)) / 8; |
| 748 |
b = (b + (8 >> 1)) / 8; |
| 749 |
c = (c + (8 >> 1)) / 8; |
| 750 |
} else {
|
| 751 |
a = (a + (scale >> 1)) / scale;
|
| 752 |
b = (b + (scale >> 1)) / scale;
|
| 753 |
c = (c + (scale >> 1)) / scale;
|
| 754 |
} |
| 755 |
#endif
|
| 756 |
/* XXX: WARNING: they did not choose the same test as MPEG4. This
|
| 757 |
is very important ! */
|
| 758 |
if(s->msmpeg4_version>3){ |
| 759 |
if(s->inter_intra_pred){
|
| 760 |
uint8_t *dest; |
| 761 |
int wrap;
|
| 762 |
|
| 763 |
if(n==1){ |
| 764 |
pred=a; |
| 765 |
*dir_ptr = 0;
|
| 766 |
}else if(n==2){ |
| 767 |
pred=c; |
| 768 |
*dir_ptr = 1;
|
| 769 |
}else if(n==3){ |
| 770 |
if (abs(a - b) < abs(b - c)) {
|
| 771 |
pred = c; |
| 772 |
*dir_ptr = 1;
|
| 773 |
} else {
|
| 774 |
pred = a; |
| 775 |
*dir_ptr = 0;
|
| 776 |
} |
| 777 |
}else{
|
| 778 |
if(n<4){ |
| 779 |
wrap= s->linesize; |
| 780 |
dest= s->current_picture.data[0] + (((n>>1) + 2*s->mb_y) * 8* wrap ) + ((n&1) + 2*s->mb_x) * 8; |
| 781 |
}else{
|
| 782 |
wrap= s->uvlinesize; |
| 783 |
dest= s->current_picture.data[n-3] + (s->mb_y * 8 * wrap) + s->mb_x * 8; |
| 784 |
} |
| 785 |
if(s->mb_x==0) a= (1024 + (scale>>1))/scale; |
| 786 |
else a= get_dc(dest-8, wrap, scale*8); |
| 787 |
if(s->mb_y==0) c= (1024 + (scale>>1))/scale; |
| 788 |
else c= get_dc(dest-8*wrap, wrap, scale*8); |
| 789 |
|
| 790 |
if (s->h263_aic_dir==0) { |
| 791 |
pred= a; |
| 792 |
*dir_ptr = 0;
|
| 793 |
}else if (s->h263_aic_dir==1) { |
| 794 |
if(n==0){ |
| 795 |
pred= c; |
| 796 |
*dir_ptr = 1;
|
| 797 |
}else{
|
| 798 |
pred= a; |
| 799 |
*dir_ptr = 0;
|
| 800 |
} |
| 801 |
}else if (s->h263_aic_dir==2) { |
| 802 |
if(n==0){ |
| 803 |
pred= a; |
| 804 |
*dir_ptr = 0;
|
| 805 |
}else{
|
| 806 |
pred= c; |
| 807 |
*dir_ptr = 1;
|
| 808 |
} |
| 809 |
} else {
|
| 810 |
pred= c; |
| 811 |
*dir_ptr = 1;
|
| 812 |
} |
| 813 |
} |
| 814 |
}else{
|
| 815 |
if (abs(a - b) < abs(b - c)) {
|
| 816 |
pred = c; |
| 817 |
*dir_ptr = 1;
|
| 818 |
} else {
|
| 819 |
pred = a; |
| 820 |
*dir_ptr = 0;
|
| 821 |
} |
| 822 |
} |
| 823 |
}else{
|
| 824 |
if (abs(a - b) <= abs(b - c)) {
|
| 825 |
pred = c; |
| 826 |
*dir_ptr = 1;
|
| 827 |
} else {
|
| 828 |
pred = a; |
| 829 |
*dir_ptr = 0;
|
| 830 |
} |
| 831 |
} |
| 832 |
|
| 833 |
/* update predictor */
|
| 834 |
*dc_val_ptr = &dc_val[0];
|
| 835 |
return pred;
|
| 836 |
} |
| 837 |
|
| 838 |
#define DC_MAX 119 |
| 839 |
|
| 840 |
#ifdef CONFIG_ENCODERS
|
| 841 |
|
| 842 |
static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr) |
| 843 |
{
|
| 844 |
int sign, code;
|
| 845 |
int pred;
|
| 846 |
|
| 847 |
if(s->msmpeg4_version==1){ |
| 848 |
int32_t *dc_val; |
| 849 |
pred = msmpeg4v1_pred_dc(s, n, &dc_val); |
| 850 |
|
| 851 |
/* update predictor */
|
| 852 |
*dc_val= level; |
| 853 |
}else{
|
| 854 |
uint16_t *dc_val; |
| 855 |
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); |
| 856 |
|
| 857 |
/* update predictor */
|
| 858 |
if (n < 4) { |
| 859 |
*dc_val = level * s->y_dc_scale; |
| 860 |
} else {
|
| 861 |
*dc_val = level * s->c_dc_scale; |
| 862 |
} |
| 863 |
} |
| 864 |
|
| 865 |
/* do the prediction */
|
| 866 |
level -= pred; |
| 867 |
|
| 868 |
if(s->msmpeg4_version<=2){ |
| 869 |
if (n < 4) { |
| 870 |
put_bits(&s->pb, |
| 871 |
v2_dc_lum_table[level+256][1], |
| 872 |
v2_dc_lum_table[level+256][0]); |
| 873 |
}else{
|
| 874 |
put_bits(&s->pb, |
| 875 |
v2_dc_chroma_table[level+256][1], |
| 876 |
v2_dc_chroma_table[level+256][0]); |
| 877 |
} |
| 878 |
}else{
|
| 879 |
sign = 0;
|
| 880 |
if (level < 0) { |
| 881 |
level = -level; |
| 882 |
sign = 1;
|
| 883 |
} |
| 884 |
code = level; |
| 885 |
if (code > DC_MAX)
|
| 886 |
code = DC_MAX; |
| 887 |
|
| 888 |
if (s->dc_table_index == 0) { |
| 889 |
if (n < 4) { |
| 890 |
put_bits(&s->pb, table0_dc_lum[code][1], table0_dc_lum[code][0]); |
| 891 |
} else {
|
| 892 |
put_bits(&s->pb, table0_dc_chroma[code][1], table0_dc_chroma[code][0]); |
| 893 |
} |
| 894 |
} else {
|
| 895 |
if (n < 4) { |
| 896 |
put_bits(&s->pb, table1_dc_lum[code][1], table1_dc_lum[code][0]); |
| 897 |
} else {
|
| 898 |
put_bits(&s->pb, table1_dc_chroma[code][1], table1_dc_chroma[code][0]); |
| 899 |
} |
| 900 |
} |
| 901 |
|
| 902 |
if (code == DC_MAX)
|
| 903 |
put_bits(&s->pb, 8, level);
|
| 904 |
|
| 905 |
if (level != 0) { |
| 906 |
put_bits(&s->pb, 1, sign);
|
| 907 |
} |
| 908 |
} |
| 909 |
} |
| 910 |
|
| 911 |
/* Encoding of a block. Very similar to MPEG4 except for a different
|
| 912 |
escape coding (same as H263) and more vlc tables.
|
| 913 |
*/
|
| 914 |
static inline void msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n) |
| 915 |
{
|
| 916 |
int level, run, last, i, j, last_index;
|
| 917 |
int last_non_zero, sign, slevel;
|
| 918 |
int code, run_diff, dc_pred_dir;
|
| 919 |
const RLTable *rl;
|
| 920 |
const uint8_t *scantable;
|
| 921 |
|
| 922 |
if (s->mb_intra) {
|
| 923 |
set_stat(ST_DC); |
| 924 |
msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);
|
| 925 |
i = 1;
|
| 926 |
if (n < 4) { |
| 927 |
rl = &rl_table[s->rl_table_index]; |
| 928 |
} else {
|
| 929 |
rl = &rl_table[3 + s->rl_chroma_table_index];
|
| 930 |
} |
| 931 |
run_diff = 0;
|
| 932 |
scantable= s->intra_scantable.permutated; |
| 933 |
set_stat(ST_INTRA_AC); |
| 934 |
} else {
|
| 935 |
i = 0;
|
| 936 |
rl = &rl_table[3 + s->rl_table_index];
|
| 937 |
if(s->msmpeg4_version<=2) |
| 938 |
run_diff = 0;
|
| 939 |
else
|
| 940 |
run_diff = 1;
|
| 941 |
scantable= s->inter_scantable.permutated; |
| 942 |
set_stat(ST_INTER_AC); |
| 943 |
} |
| 944 |
|
| 945 |
/* recalculate block_last_index for M$ wmv1 */
|
| 946 |
if(s->msmpeg4_version>=4 && s->block_last_index[n]>0){ |
| 947 |
for(last_index=63; last_index>=0; last_index--){ |
| 948 |
if(block[scantable[last_index]]) break; |
| 949 |
} |
| 950 |
s->block_last_index[n]= last_index; |
| 951 |
}else
|
| 952 |
last_index = s->block_last_index[n]; |
| 953 |
/* AC coefs */
|
| 954 |
last_non_zero = i - 1;
|
| 955 |
for (; i <= last_index; i++) {
|
| 956 |
j = scantable[i]; |
| 957 |
level = block[j]; |
| 958 |
if (level) {
|
| 959 |
run = i - last_non_zero - 1;
|
| 960 |
last = (i == last_index); |
| 961 |
sign = 0;
|
| 962 |
slevel = level; |
| 963 |
if (level < 0) { |
| 964 |
sign = 1;
|
| 965 |
level = -level; |
| 966 |
} |
| 967 |
|
| 968 |
if(level<=MAX_LEVEL && run<=MAX_RUN){
|
| 969 |
s->ac_stats[s->mb_intra][n>3][level][run][last]++;
|
| 970 |
} |
| 971 |
#if 0
|
| 972 |
else
|
| 973 |
s->ac_stats[s->mb_intra][n>3][40][63][0]++; //esc3 like
|
| 974 |
#endif
|
| 975 |
code = get_rl_index(rl, last, run, level); |
| 976 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 977 |
if (code == rl->n) {
|
| 978 |
int level1, run1;
|
| 979 |
|
| 980 |
level1 = level - rl->max_level[last][run]; |
| 981 |
if (level1 < 1) |
| 982 |
goto esc2;
|
| 983 |
code = get_rl_index(rl, last, run, level1); |
| 984 |
if (code == rl->n) {
|
| 985 |
esc2:
|
| 986 |
put_bits(&s->pb, 1, 0); |
| 987 |
if (level > MAX_LEVEL)
|
| 988 |
goto esc3;
|
| 989 |
run1 = run - rl->max_run[last][level] - run_diff; |
| 990 |
if (run1 < 0) |
| 991 |
goto esc3;
|
| 992 |
code = get_rl_index(rl, last, run1, level); |
| 993 |
if (code == rl->n) {
|
| 994 |
esc3:
|
| 995 |
/* third escape */
|
| 996 |
put_bits(&s->pb, 1, 0); |
| 997 |
put_bits(&s->pb, 1, last);
|
| 998 |
if(s->msmpeg4_version>=4){ |
| 999 |
if(s->esc3_level_length==0){ |
| 1000 |
s->esc3_level_length=8;
|
| 1001 |
s->esc3_run_length= 6;
|
| 1002 |
if(s->qscale<8) |
| 1003 |
put_bits(&s->pb, 6, 3); |
| 1004 |
else
|
| 1005 |
put_bits(&s->pb, 8, 3); |
| 1006 |
} |
| 1007 |
put_bits(&s->pb, s->esc3_run_length, run); |
| 1008 |
put_bits(&s->pb, 1, sign);
|
| 1009 |
put_bits(&s->pb, s->esc3_level_length, level); |
| 1010 |
}else{
|
| 1011 |
put_bits(&s->pb, 6, run);
|
| 1012 |
put_bits(&s->pb, 8, slevel & 0xff); |
| 1013 |
} |
| 1014 |
} else {
|
| 1015 |
/* second escape */
|
| 1016 |
put_bits(&s->pb, 1, 1); |
| 1017 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 1018 |
put_bits(&s->pb, 1, sign);
|
| 1019 |
} |
| 1020 |
} else {
|
| 1021 |
/* first escape */
|
| 1022 |
put_bits(&s->pb, 1, 1); |
| 1023 |
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| 1024 |
put_bits(&s->pb, 1, sign);
|
| 1025 |
} |
| 1026 |
} else {
|
| 1027 |
put_bits(&s->pb, 1, sign);
|
| 1028 |
} |
| 1029 |
last_non_zero = i; |
| 1030 |
} |
| 1031 |
} |
| 1032 |
} |
| 1033 |
|
| 1034 |
#endif //CONFIG_ENCODERS |
| 1035 |
|
| 1036 |
/****************************************/
|
| 1037 |
/* decoding stuff */
|
| 1038 |
|
| 1039 |
static VLC mb_non_intra_vlc[4]; |
| 1040 |
static VLC mb_intra_vlc;
|
| 1041 |
static VLC dc_lum_vlc[2]; |
| 1042 |
static VLC dc_chroma_vlc[2]; |
| 1043 |
static VLC v2_dc_lum_vlc;
|
| 1044 |
static VLC v2_dc_chroma_vlc;
|
| 1045 |
static VLC cbpy_vlc;
|
| 1046 |
static VLC v2_intra_cbpc_vlc;
|
| 1047 |
static VLC v2_mb_type_vlc;
|
| 1048 |
static VLC v2_mv_vlc;
|
| 1049 |
static VLC v1_intra_cbpc_vlc;
|
| 1050 |
static VLC v1_inter_cbpc_vlc;
|
| 1051 |
static VLC inter_intra_vlc;
|
| 1052 |
|
| 1053 |
/* this table is practically identical to the one from h263 except that its inverted */
|
| 1054 |
static void init_h263_dc_for_msmpeg4(void) |
| 1055 |
{
|
| 1056 |
int level, uni_code, uni_len;
|
| 1057 |
|
| 1058 |
for(level=-256; level<256; level++){ |
| 1059 |
int size, v, l;
|
| 1060 |
/* find number of bits */
|
| 1061 |
size = 0;
|
| 1062 |
v = abs(level); |
| 1063 |
while (v) {
|
| 1064 |
v >>= 1;
|
| 1065 |
size++; |
| 1066 |
} |
| 1067 |
|
| 1068 |
if (level < 0) |
| 1069 |
l= (-level) ^ ((1 << size) - 1); |
| 1070 |
else
|
| 1071 |
l= level; |
| 1072 |
|
| 1073 |
/* luminance h263 */
|
| 1074 |
uni_code= DCtab_lum[size][0];
|
| 1075 |
uni_len = DCtab_lum[size][1];
|
| 1076 |
uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility |
| 1077 |
|
| 1078 |
if (size > 0) { |
| 1079 |
uni_code<<=size; uni_code|=l; |
| 1080 |
uni_len+=size; |
| 1081 |
if (size > 8){ |
| 1082 |
uni_code<<=1; uni_code|=1; |
| 1083 |
uni_len++; |
| 1084 |
} |
| 1085 |
} |
| 1086 |
v2_dc_lum_table[level+256][0]= uni_code; |
| 1087 |
v2_dc_lum_table[level+256][1]= uni_len; |
| 1088 |
|
| 1089 |
/* chrominance h263 */
|
| 1090 |
uni_code= DCtab_chrom[size][0];
|
| 1091 |
uni_len = DCtab_chrom[size][1];
|
| 1092 |
uni_code ^= (1<<uni_len)-1; //M$ doesnt like compatibility |
| 1093 |
|
| 1094 |
if (size > 0) { |
| 1095 |
uni_code<<=size; uni_code|=l; |
| 1096 |
uni_len+=size; |
| 1097 |
if (size > 8){ |
| 1098 |
uni_code<<=1; uni_code|=1; |
| 1099 |
uni_len++; |
| 1100 |
} |
| 1101 |
} |
| 1102 |
v2_dc_chroma_table[level+256][0]= uni_code; |
| 1103 |
v2_dc_chroma_table[level+256][1]= uni_len; |
| 1104 |
|
| 1105 |
} |
| 1106 |
} |
| 1107 |
|
| 1108 |
/* init all vlc decoding tables */
|
| 1109 |
int ff_msmpeg4_decode_init(MpegEncContext *s)
|
| 1110 |
{
|
| 1111 |
static int done = 0; |
| 1112 |
int i;
|
| 1113 |
MVTable *mv; |
| 1114 |
|
| 1115 |
common_init(s); |
| 1116 |
|
| 1117 |
if (!done) {
|
| 1118 |
done = 1;
|
| 1119 |
|
| 1120 |
for(i=0;i<NB_RL_TABLES;i++) { |
| 1121 |
init_rl(&rl_table[i]); |
| 1122 |
init_vlc_rl(&rl_table[i]); |
| 1123 |
} |
| 1124 |
for(i=0;i<2;i++) { |
| 1125 |
mv = &mv_tables[i]; |
| 1126 |
init_vlc(&mv->vlc, MV_VLC_BITS, mv->n + 1,
|
| 1127 |
mv->table_mv_bits, 1, 1, |
| 1128 |
mv->table_mv_code, 2, 2); |
| 1129 |
} |
| 1130 |
|
| 1131 |
init_vlc(&dc_lum_vlc[0], DC_VLC_BITS, 120, |
| 1132 |
&table0_dc_lum[0][1], 8, 4, |
| 1133 |
&table0_dc_lum[0][0], 8, 4); |
| 1134 |
init_vlc(&dc_chroma_vlc[0], DC_VLC_BITS, 120, |
| 1135 |
&table0_dc_chroma[0][1], 8, 4, |
| 1136 |
&table0_dc_chroma[0][0], 8, 4); |
| 1137 |
init_vlc(&dc_lum_vlc[1], DC_VLC_BITS, 120, |
| 1138 |
&table1_dc_lum[0][1], 8, 4, |
| 1139 |
&table1_dc_lum[0][0], 8, 4); |
| 1140 |
init_vlc(&dc_chroma_vlc[1], DC_VLC_BITS, 120, |
| 1141 |
&table1_dc_chroma[0][1], 8, 4, |
| 1142 |
&table1_dc_chroma[0][0], 8, 4); |
| 1143 |
|
| 1144 |
init_vlc(&v2_dc_lum_vlc, DC_VLC_BITS, 512,
|
| 1145 |
&v2_dc_lum_table[0][1], 8, 4, |
| 1146 |
&v2_dc_lum_table[0][0], 8, 4); |
| 1147 |
init_vlc(&v2_dc_chroma_vlc, DC_VLC_BITS, 512,
|
| 1148 |
&v2_dc_chroma_table[0][1], 8, 4, |
| 1149 |
&v2_dc_chroma_table[0][0], 8, 4); |
| 1150 |
|
| 1151 |
init_vlc(&cbpy_vlc, CBPY_VLC_BITS, 16,
|
| 1152 |
&cbpy_tab[0][1], 2, 1, |
| 1153 |
&cbpy_tab[0][0], 2, 1); |
| 1154 |
init_vlc(&v2_intra_cbpc_vlc, V2_INTRA_CBPC_VLC_BITS, 4,
|
| 1155 |
&v2_intra_cbpc[0][1], 2, 1, |
| 1156 |
&v2_intra_cbpc[0][0], 2, 1); |
| 1157 |
init_vlc(&v2_mb_type_vlc, V2_MB_TYPE_VLC_BITS, 8,
|
| 1158 |
&v2_mb_type[0][1], 2, 1, |
| 1159 |
&v2_mb_type[0][0], 2, 1); |
| 1160 |
init_vlc(&v2_mv_vlc, V2_MV_VLC_BITS, 33,
|
| 1161 |
&mvtab[0][1], 2, 1, |
| 1162 |
&mvtab[0][0], 2, 1); |
| 1163 |
|
| 1164 |
for(i=0; i<4; i++){ |
| 1165 |
init_vlc(&mb_non_intra_vlc[i], MB_NON_INTRA_VLC_BITS, 128,
|
| 1166 |
&wmv2_inter_table[i][0][1], 8, 4, |
| 1167 |
&wmv2_inter_table[i][0][0], 8, 4); //FIXME name? |
| 1168 |
} |
| 1169 |
|
| 1170 |
init_vlc(&mb_intra_vlc, MB_INTRA_VLC_BITS, 64,
|
| 1171 |
&table_mb_intra[0][1], 4, 2, |
| 1172 |
&table_mb_intra[0][0], 4, 2); |
| 1173 |
|
| 1174 |
init_vlc(&v1_intra_cbpc_vlc, V1_INTRA_CBPC_VLC_BITS, 8,
|
| 1175 |
intra_MCBPC_bits, 1, 1, |
| 1176 |
intra_MCBPC_code, 1, 1); |
| 1177 |
init_vlc(&v1_inter_cbpc_vlc, V1_INTER_CBPC_VLC_BITS, 25,
|
| 1178 |
inter_MCBPC_bits, 1, 1, |
| 1179 |
inter_MCBPC_code, 1, 1); |
| 1180 |
|
| 1181 |
init_vlc(&inter_intra_vlc, INTER_INTRA_VLC_BITS, 4,
|
| 1182 |
&table_inter_intra[0][1], 2, 1, |
| 1183 |
&table_inter_intra[0][0], 2, 1); |
| 1184 |
} |
| 1185 |
|
| 1186 |
switch(s->msmpeg4_version){
|
| 1187 |
case 1: |
| 1188 |
case 2: |
| 1189 |
s->decode_mb= msmpeg4v12_decode_mb; |
| 1190 |
break;
|
| 1191 |
case 3: |
| 1192 |
case 4: |
| 1193 |
s->decode_mb= msmpeg4v34_decode_mb; |
| 1194 |
break;
|
| 1195 |
case 5: |
| 1196 |
s->decode_mb= wmv2_decode_mb; |
| 1197 |
break;
|
| 1198 |
} |
| 1199 |
|
| 1200 |
s->slice_height= s->mb_height; //to avoid 1/0 if the first frame isnt a keyframe
|
| 1201 |
|
| 1202 |
return 0; |
| 1203 |
} |
| 1204 |
|
| 1205 |
static int decode012(GetBitContext *gb) |
| 1206 |
{
|
| 1207 |
int n;
|
| 1208 |
n = get_bits1(gb); |
| 1209 |
if (n == 0) |
| 1210 |
return 0; |
| 1211 |
else
|
| 1212 |
return get_bits1(gb) + 1; |
| 1213 |
} |
| 1214 |
|
| 1215 |
int msmpeg4_decode_picture_header(MpegEncContext * s)
|
| 1216 |
{
|
| 1217 |
int code;
|
| 1218 |
|
| 1219 |
#if 0
|
| 1220 |
{
|
| 1221 |
int i;
|
| 1222 |
for(i=0; i<s->gb.size_in_bits; i++)
|
| 1223 |
printf("%d", get_bits1(&s->gb));
|
| 1224 |
// get_bits1(&s->gb);
|
| 1225 |
printf("END\n");
|
| 1226 |
return -1;
|
| 1227 |
}
|
| 1228 |
#endif
|
| 1229 |
|
| 1230 |
if(s->msmpeg4_version==1){ |
| 1231 |
int start_code, num;
|
| 1232 |
start_code = (get_bits(&s->gb, 16)<<16) | get_bits(&s->gb, 16); |
| 1233 |
if(start_code!=0x00000100){ |
| 1234 |
fprintf(stderr, "invalid startcode\n");
|
| 1235 |
return -1; |
| 1236 |
} |
| 1237 |
|
| 1238 |
num= get_bits(&s->gb, 5); // frame number */ |
| 1239 |
} |
| 1240 |
|
| 1241 |
s->pict_type = get_bits(&s->gb, 2) + 1; |
| 1242 |
if (s->pict_type != I_TYPE &&
|
| 1243 |
s->pict_type != P_TYPE){
|
| 1244 |
fprintf(stderr, "invalid picture type\n");
|
| 1245 |
return -1; |
| 1246 |
} |
| 1247 |
#if 0
|
| 1248 |
{
|
| 1249 |
static int had_i=0;
|
| 1250 |
if(s->pict_type == I_TYPE) had_i=1;
|
| 1251 |
if(!had_i) return -1;
|
| 1252 |
}
|
| 1253 |
#endif
|
| 1254 |
s->qscale = get_bits(&s->gb, 5);
|
| 1255 |
if(s->qscale==0){ |
| 1256 |
fprintf(stderr, "invalid qscale\n");
|
| 1257 |
return -1; |
| 1258 |
} |
| 1259 |
|
| 1260 |
if (s->pict_type == I_TYPE) {
|
| 1261 |
code = get_bits(&s->gb, 5);
|
| 1262 |
if(s->msmpeg4_version==1){ |
| 1263 |
if(code==0 || code>s->mb_height){ |
| 1264 |
fprintf(stderr, "invalid slice height %d\n", code);
|
| 1265 |
return -1; |
| 1266 |
} |
| 1267 |
|
| 1268 |
s->slice_height = code; |
| 1269 |
}else{
|
| 1270 |
/* 0x17: one slice, 0x18: two slices, ... */
|
| 1271 |
if (code < 0x17){ |
| 1272 |
fprintf(stderr, "error, slice code was %X\n", code);
|
| 1273 |
return -1; |
| 1274 |
} |
| 1275 |
|
| 1276 |
s->slice_height = s->mb_height / (code - 0x16);
|
| 1277 |
} |
| 1278 |
|
| 1279 |
switch(s->msmpeg4_version){
|
| 1280 |
case 1: |
| 1281 |
case 2: |
| 1282 |
s->rl_chroma_table_index = 2;
|
| 1283 |
s->rl_table_index = 2;
|
| 1284 |
|
| 1285 |
s->dc_table_index = 0; //not used |
| 1286 |
break;
|
| 1287 |
case 3: |
| 1288 |
s->rl_chroma_table_index = decode012(&s->gb); |
| 1289 |
s->rl_table_index = decode012(&s->gb); |
| 1290 |
|
| 1291 |
s->dc_table_index = get_bits1(&s->gb); |
| 1292 |
break;
|
| 1293 |
case 4: |
| 1294 |
msmpeg4_decode_ext_header(s, (2+5+5+17+7)/8); |
| 1295 |
|
| 1296 |
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
|
| 1297 |
else s->per_mb_rl_table= 0; |
| 1298 |
|
| 1299 |
if(!s->per_mb_rl_table){
|
| 1300 |
s->rl_chroma_table_index = decode012(&s->gb); |
| 1301 |
s->rl_table_index = decode012(&s->gb); |
| 1302 |
} |
| 1303 |
|
| 1304 |
s->dc_table_index = get_bits1(&s->gb); |
| 1305 |
s->inter_intra_pred= 0;
|
| 1306 |
break;
|
| 1307 |
} |
| 1308 |
s->no_rounding = 1;
|
| 1309 |
/* printf("qscale:%d rlc:%d rl:%d dc:%d mbrl:%d slice:%d \n",
|
| 1310 |
s->qscale,
|
| 1311 |
s->rl_chroma_table_index,
|
| 1312 |
s->rl_table_index,
|
| 1313 |
s->dc_table_index,
|
| 1314 |
s->per_mb_rl_table,
|
| 1315 |
s->slice_height);*/
|
| 1316 |
} else {
|
| 1317 |
switch(s->msmpeg4_version){
|
| 1318 |
case 1: |
| 1319 |
case 2: |
| 1320 |
if(s->msmpeg4_version==1) |
| 1321 |
s->use_skip_mb_code = 1;
|
| 1322 |
else
|
| 1323 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1324 |
s->rl_table_index = 2;
|
| 1325 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1326 |
s->dc_table_index = 0; //not used |
| 1327 |
s->mv_table_index = 0;
|
| 1328 |
break;
|
| 1329 |
case 3: |
| 1330 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1331 |
s->rl_table_index = decode012(&s->gb); |
| 1332 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1333 |
|
| 1334 |
s->dc_table_index = get_bits1(&s->gb); |
| 1335 |
|
| 1336 |
s->mv_table_index = get_bits1(&s->gb); |
| 1337 |
break;
|
| 1338 |
case 4: |
| 1339 |
s->use_skip_mb_code = get_bits1(&s->gb); |
| 1340 |
|
| 1341 |
if(s->bit_rate > MBAC_BITRATE) s->per_mb_rl_table= get_bits1(&s->gb);
|
| 1342 |
else s->per_mb_rl_table= 0; |
| 1343 |
|
| 1344 |
if(!s->per_mb_rl_table){
|
| 1345 |
s->rl_table_index = decode012(&s->gb); |
| 1346 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1347 |
} |
| 1348 |
|
| 1349 |
s->dc_table_index = get_bits1(&s->gb); |
| 1350 |
|
| 1351 |
s->mv_table_index = get_bits1(&s->gb); |
| 1352 |
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE); |
| 1353 |
break;
|
| 1354 |
} |
| 1355 |
/* printf("skip:%d rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d \n",
|
| 1356 |
s->use_skip_mb_code,
|
| 1357 |
s->rl_table_index,
|
| 1358 |
s->rl_chroma_table_index,
|
| 1359 |
s->dc_table_index,
|
| 1360 |
s->mv_table_index,
|
| 1361 |
s->per_mb_rl_table,
|
| 1362 |
s->qscale);*/
|
| 1363 |
if(s->flipflop_rounding){
|
| 1364 |
s->no_rounding ^= 1;
|
| 1365 |
}else{
|
| 1366 |
s->no_rounding = 0;
|
| 1367 |
} |
| 1368 |
} |
| 1369 |
//printf("%d %d %d %d %d\n", s->pict_type, s->bit_rate, s->inter_intra_pred, s->width, s->height);
|
| 1370 |
|
| 1371 |
s->esc3_level_length= 0;
|
| 1372 |
s->esc3_run_length= 0;
|
| 1373 |
|
| 1374 |
#ifdef DEBUG
|
| 1375 |
printf("*****frame %d:\n", frame_count++);
|
| 1376 |
#endif
|
| 1377 |
return 0; |
| 1378 |
} |
| 1379 |
|
| 1380 |
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size) |
| 1381 |
{
|
| 1382 |
int left= buf_size*8 - get_bits_count(&s->gb); |
| 1383 |
int length= s->msmpeg4_version>=3 ? 17 : 16; |
| 1384 |
/* the alt_bitstream reader could read over the end so we need to check it */
|
| 1385 |
if(left>=length && left<length+8) |
| 1386 |
{
|
| 1387 |
int fps;
|
| 1388 |
|
| 1389 |
fps= get_bits(&s->gb, 5);
|
| 1390 |
s->bit_rate= get_bits(&s->gb, 11)*1024; |
| 1391 |
if(s->msmpeg4_version>=3) |
| 1392 |
s->flipflop_rounding= get_bits1(&s->gb); |
| 1393 |
else
|
| 1394 |
s->flipflop_rounding= 0;
|
| 1395 |
|
| 1396 |
// printf("fps:%2d bps:%2d roundingType:%1d\n", fps, s->bit_rate/1024, s->flipflop_rounding);
|
| 1397 |
} |
| 1398 |
else if(left<length+8) |
| 1399 |
{
|
| 1400 |
s->flipflop_rounding= 0;
|
| 1401 |
printf("ext header missing, %d left\n", left);
|
| 1402 |
} |
| 1403 |
else
|
| 1404 |
{
|
| 1405 |
fprintf(stderr, "I frame too long, ignoring ext header\n");
|
| 1406 |
} |
| 1407 |
|
| 1408 |
return 0; |
| 1409 |
} |
| 1410 |
|
| 1411 |
static inline void msmpeg4_memsetw(short *tab, int val, int n) |
| 1412 |
{
|
| 1413 |
int i;
|
| 1414 |
for(i=0;i<n;i++) |
| 1415 |
tab[i] = val; |
| 1416 |
} |
| 1417 |
|
| 1418 |
#ifdef CONFIG_ENCODERS
|
| 1419 |
|
| 1420 |
static void msmpeg4v2_encode_motion(MpegEncContext * s, int val) |
| 1421 |
{
|
| 1422 |
int range, bit_size, sign, code, bits;
|
| 1423 |
|
| 1424 |
if (val == 0) { |
| 1425 |
/* zero vector */
|
| 1426 |
code = 0;
|
| 1427 |
put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); |
| 1428 |
} else {
|
| 1429 |
bit_size = s->f_code - 1;
|
| 1430 |
range = 1 << bit_size;
|
| 1431 |
if (val <= -64) |
| 1432 |
val += 64;
|
| 1433 |
else if (val >= 64) |
| 1434 |
val -= 64;
|
| 1435 |
|
| 1436 |
if (val >= 0) { |
| 1437 |
sign = 0;
|
| 1438 |
} else {
|
| 1439 |
val = -val; |
| 1440 |
sign = 1;
|
| 1441 |
} |
| 1442 |
val--; |
| 1443 |
code = (val >> bit_size) + 1;
|
| 1444 |
bits = val & (range - 1);
|
| 1445 |
|
| 1446 |
put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); |
| 1447 |
if (bit_size > 0) { |
| 1448 |
put_bits(&s->pb, bit_size, bits); |
| 1449 |
} |
| 1450 |
} |
| 1451 |
} |
| 1452 |
|
| 1453 |
#endif //CONFIG_ENCODERS |
| 1454 |
|
| 1455 |
/* this is identical to h263 except that its range is multiplied by 2 */
|
| 1456 |
static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) |
| 1457 |
{
|
| 1458 |
int code, val, sign, shift;
|
| 1459 |
|
| 1460 |
code = get_vlc2(&s->gb, v2_mv_vlc.table, V2_MV_VLC_BITS, 2);
|
| 1461 |
// printf("MV code %d at %d %d pred: %d\n", code, s->mb_x,s->mb_y, pred);
|
| 1462 |
if (code < 0) |
| 1463 |
return 0xffff; |
| 1464 |
|
| 1465 |
if (code == 0) |
| 1466 |
return pred;
|
| 1467 |
sign = get_bits1(&s->gb); |
| 1468 |
shift = f_code - 1;
|
| 1469 |
val = (code - 1) << shift;
|
| 1470 |
if (shift > 0) |
| 1471 |
val |= get_bits(&s->gb, shift); |
| 1472 |
val++; |
| 1473 |
if (sign)
|
| 1474 |
val = -val; |
| 1475 |
|
| 1476 |
val += pred; |
| 1477 |
if (val <= -64) |
| 1478 |
val += 64;
|
| 1479 |
else if (val >= 64) |
| 1480 |
val -= 64;
|
| 1481 |
|
| 1482 |
return val;
|
| 1483 |
} |
| 1484 |
|
| 1485 |
static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) |
| 1486 |
{
|
| 1487 |
int cbp, code, i;
|
| 1488 |
|
| 1489 |
s->error_status_table[s->mb_x + s->mb_y*s->mb_width]= 0;
|
| 1490 |
|
| 1491 |
if (s->pict_type == P_TYPE) {
|
| 1492 |
if (s->use_skip_mb_code) {
|
| 1493 |
if (get_bits1(&s->gb)) {
|
| 1494 |
/* skip mb */
|
| 1495 |
s->mb_intra = 0;
|
| 1496 |
for(i=0;i<6;i++) |
| 1497 |
s->block_last_index[i] = -1;
|
| 1498 |
s->mv_dir = MV_DIR_FORWARD; |
| 1499 |
s->mv_type = MV_TYPE_16X16; |
| 1500 |
s->mv[0][0][0] = 0; |
| 1501 |
s->mv[0][0][1] = 0; |
| 1502 |
s->mb_skiped = 1;
|
| 1503 |
return 0; |
| 1504 |
} |
| 1505 |
} |
| 1506 |
|
| 1507 |
if(s->msmpeg4_version==2) |
| 1508 |
code = get_vlc2(&s->gb, v2_mb_type_vlc.table, V2_MB_TYPE_VLC_BITS, 1);
|
| 1509 |
else
|
| 1510 |
code = get_vlc2(&s->gb, v1_inter_cbpc_vlc.table, V1_INTER_CBPC_VLC_BITS, 3);
|
| 1511 |
if(code<0 || code>7){ |
| 1512 |
fprintf(stderr, "cbpc %d invalid at %d %d\n", code, s->mb_x, s->mb_y);
|
| 1513 |
return -1; |
| 1514 |
} |
| 1515 |
|
| 1516 |
s->mb_intra = code >>2;
|
| 1517 |
|
| 1518 |
cbp = code & 0x3;
|
| 1519 |
} else {
|
| 1520 |
s->mb_intra = 1;
|
| 1521 |
if(s->msmpeg4_version==2) |
| 1522 |
cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
|
| 1523 |
else
|
| 1524 |
cbp= get_vlc2(&s->gb, v1_intra_cbpc_vlc.table, V1_INTRA_CBPC_VLC_BITS, 1);
|
| 1525 |
if(cbp<0 || cbp>3){ |
| 1526 |
fprintf(stderr, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
|
| 1527 |
return -1; |
| 1528 |
} |
| 1529 |
} |
| 1530 |
|
| 1531 |
if (!s->mb_intra) {
|
| 1532 |
int mx, my, cbpy;
|
| 1533 |
|
| 1534 |
cbpy= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
| 1535 |
if(cbpy<0){ |
| 1536 |
fprintf(stderr, "cbpy %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
|
| 1537 |
return -1; |
| 1538 |
} |
| 1539 |
|
| 1540 |
cbp|= cbpy<<2;
|
| 1541 |
if(s->msmpeg4_version==1 || (cbp&3) != 3) cbp^= 0x3C; |
| 1542 |
|
| 1543 |
h263_pred_motion(s, 0, &mx, &my);
|
| 1544 |
mx= msmpeg4v2_decode_motion(s, mx, 1);
|
| 1545 |
my= msmpeg4v2_decode_motion(s, my, 1);
|
| 1546 |
|
| 1547 |
s->mv_dir = MV_DIR_FORWARD; |
| 1548 |
s->mv_type = MV_TYPE_16X16; |
| 1549 |
s->mv[0][0][0] = mx; |
| 1550 |
s->mv[0][0][1] = my; |
| 1551 |
} else {
|
| 1552 |
if(s->msmpeg4_version==2){ |
| 1553 |
s->ac_pred = get_bits1(&s->gb); |
| 1554 |
cbp|= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors |
| 1555 |
} else{
|
| 1556 |
s->ac_pred = 0;
|
| 1557 |
cbp|= get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors |
| 1558 |
if(s->pict_type==P_TYPE) cbp^=0x3C; |
| 1559 |
} |
| 1560 |
} |
| 1561 |
|
| 1562 |
for (i = 0; i < 6; i++) { |
| 1563 |
if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| 1564 |
{
|
| 1565 |
fprintf(stderr,"\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
|
| 1566 |
return -1; |
| 1567 |
} |
| 1568 |
} |
| 1569 |
return 0; |
| 1570 |
} |
| 1571 |
|
| 1572 |
static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]) |
| 1573 |
{
|
| 1574 |
int cbp, code, i;
|
| 1575 |
uint8_t *coded_val; |
| 1576 |
|
| 1577 |
#ifdef PRINT_MB
|
| 1578 |
if(s->mb_x==0){ |
| 1579 |
printf("\n");
|
| 1580 |
if(s->mb_y==0) printf("\n"); |
| 1581 |
} |
| 1582 |
#endif
|
| 1583 |
|
| 1584 |
s->error_status_table[s->mb_x + s->mb_y*s->mb_width]= 0;
|
| 1585 |
|
| 1586 |
if (s->pict_type == P_TYPE) {
|
| 1587 |
set_stat(ST_INTER_MB); |
| 1588 |
if (s->use_skip_mb_code) {
|
| 1589 |
if (get_bits1(&s->gb)) {
|
| 1590 |
/* skip mb */
|
| 1591 |
s->mb_intra = 0;
|
| 1592 |
for(i=0;i<6;i++) |
| 1593 |
s->block_last_index[i] = -1;
|
| 1594 |
s->mv_dir = MV_DIR_FORWARD; |
| 1595 |
s->mv_type = MV_TYPE_16X16; |
| 1596 |
s->mv[0][0][0] = 0; |
| 1597 |
s->mv[0][0][1] = 0; |
| 1598 |
s->mb_skiped = 1;
|
| 1599 |
#ifdef PRINT_MB
|
| 1600 |
printf("S ");
|
| 1601 |
#endif
|
| 1602 |
return 0; |
| 1603 |
} |
| 1604 |
} |
| 1605 |
|
| 1606 |
code = get_vlc2(&s->gb, mb_non_intra_vlc[DEFAULT_INTER_INDEX].table, MB_NON_INTRA_VLC_BITS, 3);
|
| 1607 |
if (code < 0) |
| 1608 |
return -1; |
| 1609 |
//s->mb_intra = (code & 0x40) ? 0 : 1;
|
| 1610 |
s->mb_intra = (~code & 0x40) >> 6; |
| 1611 |
|
| 1612 |
cbp = code & 0x3f;
|
| 1613 |
} else {
|
| 1614 |
set_stat(ST_INTRA_MB); |
| 1615 |
s->mb_intra = 1;
|
| 1616 |
code = get_vlc2(&s->gb, mb_intra_vlc.table, MB_INTRA_VLC_BITS, 2);
|
| 1617 |
if (code < 0) |
| 1618 |
return -1; |
| 1619 |
/* predict coded block pattern */
|
| 1620 |
cbp = 0;
|
| 1621 |
for(i=0;i<6;i++) { |
| 1622 |
int val = ((code >> (5 - i)) & 1); |
| 1623 |
if (i < 4) { |
| 1624 |
int pred = coded_block_pred(s, i, &coded_val);
|
| 1625 |
val = val ^ pred; |
| 1626 |
*coded_val = val; |
| 1627 |
} |
| 1628 |
cbp |= val << (5 - i);
|
| 1629 |
} |
| 1630 |
} |
| 1631 |
|
| 1632 |
if (!s->mb_intra) {
|
| 1633 |
int mx, my;
|
| 1634 |
//printf("P at %d %d\n", s->mb_x, s->mb_y);
|
| 1635 |
if(s->per_mb_rl_table && cbp){
|
| 1636 |
s->rl_table_index = decode012(&s->gb); |
| 1637 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1638 |
} |
| 1639 |
set_stat(ST_MV); |
| 1640 |
h263_pred_motion(s, 0, &mx, &my);
|
| 1641 |
if (msmpeg4_decode_motion(s, &mx, &my) < 0) |
| 1642 |
return -1; |
| 1643 |
s->mv_dir = MV_DIR_FORWARD; |
| 1644 |
s->mv_type = MV_TYPE_16X16; |
| 1645 |
s->mv[0][0][0] = mx; |
| 1646 |
s->mv[0][0][1] = my; |
| 1647 |
#ifdef PRINT_MB
|
| 1648 |
printf("P ");
|
| 1649 |
#endif
|
| 1650 |
} else {
|
| 1651 |
//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));
|
| 1652 |
set_stat(ST_INTRA_MB); |
| 1653 |
s->ac_pred = get_bits1(&s->gb); |
| 1654 |
#ifdef PRINT_MB
|
| 1655 |
printf("%c", s->ac_pred ? 'A' : 'I'); |
| 1656 |
#endif
|
| 1657 |
if(s->inter_intra_pred){
|
| 1658 |
s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
|
| 1659 |
// printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
|
| 1660 |
} |
| 1661 |
if(s->per_mb_rl_table && cbp){
|
| 1662 |
s->rl_table_index = decode012(&s->gb); |
| 1663 |
s->rl_chroma_table_index = s->rl_table_index; |
| 1664 |
} |
| 1665 |
} |
| 1666 |
|
| 1667 |
for (i = 0; i < 6; i++) { |
| 1668 |
if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) |
| 1669 |
{
|
| 1670 |
fprintf(stderr,"\nerror while decoding block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
|
| 1671 |
return -1; |
| 1672 |
} |
| 1673 |
} |
| 1674 |
|
| 1675 |
return 0; |
| 1676 |
} |
| 1677 |
//#define ERROR_DETAILS
|
| 1678 |
static inline int msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block, |
| 1679 |
int n, int coded, const uint8_t *scan_table) |
| 1680 |
{
|
| 1681 |
int level, i, last, run, run_diff;
|
| 1682 |
int dc_pred_dir;
|
| 1683 |
RLTable *rl; |
| 1684 |
RL_VLC_ELEM *rl_vlc; |
| 1685 |
int qmul, qadd;
|
| 1686 |
|
| 1687 |
if (s->mb_intra) {
|
| 1688 |
qmul=1;
|
| 1689 |
qadd=0;
|
| 1690 |
|
| 1691 |
/* DC coef */
|
| 1692 |
set_stat(ST_DC); |
| 1693 |
level = msmpeg4_decode_dc(s, n, &dc_pred_dir); |
| 1694 |
#ifdef PRINT_MB
|
| 1695 |
{
|
| 1696 |
static int c; |
| 1697 |
if(n==0) c=0; |
| 1698 |
if(n==4) printf("%X", c); |
| 1699 |
c+= c +dc_pred_dir; |
| 1700 |
} |
| 1701 |
#endif
|
| 1702 |
if (level < 0){ |
| 1703 |
fprintf(stderr, "dc overflow- block: %d qscale: %d//\n", n, s->qscale);
|
| 1704 |
if(s->inter_intra_pred) level=0; |
| 1705 |
else return -1; |
| 1706 |
} |
| 1707 |
if (n < 4) { |
| 1708 |
rl = &rl_table[s->rl_table_index]; |
| 1709 |
if(level > 256*s->y_dc_scale){ |
| 1710 |
fprintf(stderr, "dc overflow+ L qscale: %d//\n", s->qscale);
|
| 1711 |
if(!s->inter_intra_pred) return -1; |
| 1712 |
} |
| 1713 |
} else {
|
| 1714 |
rl = &rl_table[3 + s->rl_chroma_table_index];
|
| 1715 |
if(level > 256*s->c_dc_scale){ |
| 1716 |
fprintf(stderr, "dc overflow+ C qscale: %d//\n", s->qscale);
|
| 1717 |
if(!s->inter_intra_pred) return -1; |
| 1718 |
} |
| 1719 |
} |
| 1720 |
block[0] = level;
|
| 1721 |
|
| 1722 |
run_diff = 0;
|
| 1723 |
i = 0;
|
| 1724 |
if (!coded) {
|
| 1725 |
goto not_coded;
|
| 1726 |
} |
| 1727 |
if (s->ac_pred) {
|
| 1728 |
if (dc_pred_dir == 0) |
| 1729 |
scan_table = s->intra_v_scantable.permutated; /* left */
|
| 1730 |
else
|
| 1731 |
scan_table = s->intra_h_scantable.permutated; /* top */
|
| 1732 |
} else {
|
| 1733 |
scan_table = s->intra_scantable.permutated; |
| 1734 |
} |
| 1735 |
set_stat(ST_INTRA_AC); |
| 1736 |
rl_vlc= rl->rl_vlc[0];
|
| 1737 |
} else {
|
| 1738 |
qmul = s->qscale << 1;
|
| 1739 |
qadd = (s->qscale - 1) | 1; |
| 1740 |
i = -1;
|
| 1741 |
rl = &rl_table[3 + s->rl_table_index];
|
| 1742 |
|
| 1743 |
if(s->msmpeg4_version==2) |
| 1744 |
run_diff = 0;
|
| 1745 |
else
|
| 1746 |
run_diff = 1;
|
| 1747 |
|
| 1748 |
if (!coded) {
|
| 1749 |
s->block_last_index[n] = i; |
| 1750 |
return 0; |
| 1751 |
} |
| 1752 |
if(!scan_table)
|
| 1753 |
scan_table = s->inter_scantable.permutated; |
| 1754 |
set_stat(ST_INTER_AC); |
| 1755 |
rl_vlc= rl->rl_vlc[s->qscale]; |
| 1756 |
} |
| 1757 |
{
|
| 1758 |
OPEN_READER(re, &s->gb); |
| 1759 |
for(;;) {
|
| 1760 |
UPDATE_CACHE(re, &s->gb); |
| 1761 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
| 1762 |
if (level==0) { |
| 1763 |
int cache;
|
| 1764 |
cache= GET_CACHE(re, &s->gb); |
| 1765 |
/* escape */
|
| 1766 |
if (s->msmpeg4_version==1 || (cache&0x80000000)==0) { |
| 1767 |
if (s->msmpeg4_version==1 || (cache&0x40000000)==0) { |
| 1768 |
/* third escape */
|
| 1769 |
if(s->msmpeg4_version!=1) LAST_SKIP_BITS(re, &s->gb, 2); |
| 1770 |
UPDATE_CACHE(re, &s->gb); |
| 1771 |
if(s->msmpeg4_version<=3){ |
| 1772 |
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
| 1773 |
run= SHOW_UBITS(re, &s->gb, 6); SKIP_CACHE(re, &s->gb, 6); |
| 1774 |
level= SHOW_SBITS(re, &s->gb, 8); LAST_SKIP_CACHE(re, &s->gb, 8); |
| 1775 |
SKIP_COUNTER(re, &s->gb, 1+6+8); |
| 1776 |
}else{
|
| 1777 |
int sign;
|
| 1778 |
last= SHOW_UBITS(re, &s->gb, 1); SKIP_BITS(re, &s->gb, 1); |
| 1779 |
if(!s->esc3_level_length){
|
| 1780 |
int ll;
|
| 1781 |
//printf("ESC-3 %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
|
| 1782 |
if(s->qscale<8){ |
| 1783 |
ll= SHOW_UBITS(re, &s->gb, 3); SKIP_BITS(re, &s->gb, 3); |
| 1784 |
if(ll==0){ |
| 1785 |
if(SHOW_UBITS(re, &s->gb, 1)) printf("cool a new vlc code ,contact the ffmpeg developers and upload the file\n"); |
| 1786 |
SKIP_BITS(re, &s->gb, 1);
|
| 1787 |
ll=8;
|
| 1788 |
} |
| 1789 |
}else{
|
| 1790 |
ll=2;
|
| 1791 |
while(ll<8 && SHOW_UBITS(re, &s->gb, 1)==0){ |
| 1792 |
ll++; |
| 1793 |
SKIP_BITS(re, &s->gb, 1);
|
| 1794 |
} |
| 1795 |
if(ll<8) SKIP_BITS(re, &s->gb, 1); |
| 1796 |
} |
| 1797 |
|
| 1798 |
s->esc3_level_length= ll; |
| 1799 |
s->esc3_run_length= SHOW_UBITS(re, &s->gb, 2) + 3; SKIP_BITS(re, &s->gb, 2); |
| 1800 |
//printf("level length:%d, run length: %d\n", ll, s->esc3_run_length);
|
| 1801 |
UPDATE_CACHE(re, &s->gb); |
| 1802 |
} |
| 1803 |
run= SHOW_UBITS(re, &s->gb, s->esc3_run_length); |
| 1804 |
SKIP_BITS(re, &s->gb, s->esc3_run_length); |
| 1805 |
|
| 1806 |
sign= SHOW_UBITS(re, &s->gb, 1);
|
| 1807 |
SKIP_BITS(re, &s->gb, 1);
|
| 1808 |
|
| 1809 |
level= SHOW_UBITS(re, &s->gb, s->esc3_level_length); |
| 1810 |
SKIP_BITS(re, &s->gb, s->esc3_level_length); |
| 1811 |
if(sign) level= -level;
|
| 1812 |
} |
| 1813 |
//printf("level: %d, run: %d at %d %d\n", level, run, s->mb_x, s->mb_y);
|
| 1814 |
#if 0 // waste of time / this will detect very few errors
|
| 1815 |
{
|
| 1816 |
const int abs_level= ABS(level);
|
| 1817 |
const int run1= run - rl->max_run[last][abs_level] - run_diff;
|
| 1818 |
if(abs_level<=MAX_LEVEL && run<=MAX_RUN){
|
| 1819 |
if(abs_level <= rl->max_level[last][run]){
|
| 1820 |
fprintf(stderr, "illegal 3. esc, vlc encoding possible\n");
|
| 1821 |
return DECODING_AC_LOST;
|
| 1822 |
}
|
| 1823 |
if(abs_level <= rl->max_level[last][run]*2){
|
| 1824 |
fprintf(stderr, "illegal 3. esc, esc 1 encoding possible\n");
|
| 1825 |
return DECODING_AC_LOST;
|
| 1826 |
}
|
| 1827 |
if(run1>=0 && abs_level <= rl->max_level[last][run1]){
|
| 1828 |
fprintf(stderr, "illegal 3. esc, esc 2 encoding possible\n");
|
| 1829 |
return DECODING_AC_LOST;
|
| 1830 |
}
|
| 1831 |
}
|
| 1832 |
}
|
| 1833 |
#endif
|
| 1834 |
//level = level * qmul + (level>0) * qadd - (level<=0) * qadd ;
|
| 1835 |
if (level>0) level= level * qmul + qadd; |
| 1836 |
else level= level * qmul - qadd;
|
| 1837 |
#if 0 // waste of time too :(
|
| 1838 |
if(level>2048 || level<-2048){
|
| 1839 |
fprintf(stderr, "|level| overflow in 3. esc\n");
|
| 1840 |
return DECODING_AC_LOST;
|
| 1841 |
}
|
| 1842 |
#endif
|
| 1843 |
i+= run + 1;
|
| 1844 |
if(last) i+=192; |
| 1845 |
#ifdef ERROR_DETAILS
|
| 1846 |
if(run==66) |
| 1847 |
fprintf(stderr, "illegal vlc code in ESC3 level=%d\n", level);
|
| 1848 |
else if((i>62 && i<192) || i>192+63) |
| 1849 |
fprintf(stderr, "run overflow in ESC3 i=%d run=%d level=%d\n", i, run, level);
|
| 1850 |
#endif
|
| 1851 |
} else {
|
| 1852 |
/* second escape */
|
| 1853 |
#if MIN_CACHE_BITS < 23 |
| 1854 |
LAST_SKIP_BITS(re, &s->gb, 2);
|
| 1855 |
UPDATE_CACHE(re, &s->gb); |
| 1856 |
#else
|
| 1857 |
SKIP_BITS(re, &s->gb, 2);
|
| 1858 |
#endif
|
| 1859 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
| 1860 |
i+= run + rl->max_run[run>>7][level/qmul] + run_diff; //FIXME opt indexing |
| 1861 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1862 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1863 |
#ifdef ERROR_DETAILS
|
| 1864 |
if(run==66) |
| 1865 |
fprintf(stderr, "illegal vlc code in ESC2 level=%d\n", level);
|
| 1866 |
else if((i>62 && i<192) || i>192+63) |
| 1867 |
fprintf(stderr, "run overflow in ESC2 i=%d run=%d level=%d\n", i, run, level);
|
| 1868 |
#endif
|
| 1869 |
} |
| 1870 |
} else {
|
| 1871 |
/* first escape */
|
| 1872 |
#if MIN_CACHE_BITS < 22 |
| 1873 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1874 |
UPDATE_CACHE(re, &s->gb); |
| 1875 |
#else
|
| 1876 |
SKIP_BITS(re, &s->gb, 1);
|
| 1877 |
#endif
|
| 1878 |
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
| 1879 |
i+= run; |
| 1880 |
level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing |
| 1881 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1882 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1883 |
#ifdef ERROR_DETAILS
|
| 1884 |
if(run==66) |
| 1885 |
fprintf(stderr, "illegal vlc code in ESC1 level=%d\n", level);
|
| 1886 |
else if((i>62 && i<192) || i>192+63) |
| 1887 |
fprintf(stderr, "run overflow in ESC1 i=%d run=%d level=%d\n", i, run, level);
|
| 1888 |
#endif
|
| 1889 |
} |
| 1890 |
} else {
|
| 1891 |
i+= run; |
| 1892 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1893 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1894 |
#ifdef ERROR_DETAILS
|
| 1895 |
if(run==66) |
| 1896 |
fprintf(stderr, "illegal vlc code level=%d\n", level);
|
| 1897 |
else if((i>62 && i<192) || i>192+63) |
| 1898 |
fprintf(stderr, "run overflow i=%d run=%d level=%d\n", i, run, level);
|
| 1899 |
#endif
|
| 1900 |
} |
| 1901 |
if (i > 62){ |
| 1902 |
i-= 192;
|
| 1903 |
if(i&(~63)){ |
| 1904 |
const int left= s->gb.size_in_bits - get_bits_count(&s->gb); |
| 1905 |
if(((i+192 == 64 && level/qmul==-1) || s->error_resilience<=1) && left>=0){ |
| 1906 |
fprintf(stderr, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y);
|
| 1907 |
break;
|
| 1908 |
}else{
|
| 1909 |
fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 1910 |
return -1; |
| 1911 |
} |
| 1912 |
} |
| 1913 |
|
| 1914 |
block[scan_table[i]] = level; |
| 1915 |
break;
|
| 1916 |
} |
| 1917 |
|
| 1918 |
block[scan_table[i]] = level; |
| 1919 |
} |
| 1920 |
CLOSE_READER(re, &s->gb); |
| 1921 |
} |
| 1922 |
not_coded:
|
| 1923 |
if (s->mb_intra) {
|
| 1924 |
mpeg4_pred_ac(s, block, n, dc_pred_dir); |
| 1925 |
if (s->ac_pred) {
|
| 1926 |
i = 63; /* XXX: not optimal */ |
| 1927 |
} |
| 1928 |
} |
| 1929 |
if(s->msmpeg4_version>=4 && i>0) i=63; //FIXME/XXX optimize |
| 1930 |
s->block_last_index[n] = i; |
| 1931 |
|
| 1932 |
return 0; |
| 1933 |
} |
| 1934 |
|
| 1935 |
static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) |
| 1936 |
{
|
| 1937 |
int level, pred;
|
| 1938 |
|
| 1939 |
if(s->msmpeg4_version<=2){ |
| 1940 |
if (n < 4) { |
| 1941 |
level = get_vlc2(&s->gb, v2_dc_lum_vlc.table, DC_VLC_BITS, 3);
|
| 1942 |
} else {
|
| 1943 |
level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3);
|
| 1944 |
} |
| 1945 |
if (level < 0) |
| 1946 |
return -1; |
| 1947 |
level-=256;
|
| 1948 |
}else{ //FIXME optimize use unified tables & index |
| 1949 |
if (n < 4) { |
| 1950 |
level = get_vlc2(&s->gb, dc_lum_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
|
| 1951 |
} else {
|
| 1952 |
level = get_vlc2(&s->gb, dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
|
| 1953 |
} |
| 1954 |
if (level < 0){ |
| 1955 |
fprintf(stderr, "illegal dc vlc\n");
|
| 1956 |
return -1; |
| 1957 |
} |
| 1958 |
|
| 1959 |
if (level == DC_MAX) {
|
| 1960 |
level = get_bits(&s->gb, 8);
|
| 1961 |
if (get_bits1(&s->gb))
|
| 1962 |
level = -level; |
| 1963 |
} else if (level != 0) { |
| 1964 |
if (get_bits1(&s->gb))
|
| 1965 |
level = -level; |
| 1966 |
} |
| 1967 |
} |
| 1968 |
|
| 1969 |
if(s->msmpeg4_version==1){ |
| 1970 |
int32_t *dc_val; |
| 1971 |
pred = msmpeg4v1_pred_dc(s, n, &dc_val); |
| 1972 |
level += pred; |
| 1973 |
|
| 1974 |
/* update predictor */
|
| 1975 |
*dc_val= level; |
| 1976 |
}else{
|
| 1977 |
uint16_t *dc_val; |
| 1978 |
pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr); |
| 1979 |
level += pred; |
| 1980 |
|
| 1981 |
/* update predictor */
|
| 1982 |
if (n < 4) { |
| 1983 |
*dc_val = level * s->y_dc_scale; |
| 1984 |
} else {
|
| 1985 |
*dc_val = level * s->c_dc_scale; |
| 1986 |
} |
| 1987 |
} |
| 1988 |
|
| 1989 |
return level;
|
| 1990 |
} |
| 1991 |
|
| 1992 |
static int msmpeg4_decode_motion(MpegEncContext * s, |
| 1993 |
int *mx_ptr, int *my_ptr) |
| 1994 |
{
|
| 1995 |
MVTable *mv; |
| 1996 |
int code, mx, my;
|
| 1997 |
|
| 1998 |
mv = &mv_tables[s->mv_table_index]; |
| 1999 |
|
| 2000 |
code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2);
|
| 2001 |
if (code < 0){ |
| 2002 |
fprintf(stderr, "illegal MV code at %d %d\n", s->mb_x, s->mb_y);
|
| 2003 |
return -1; |
| 2004 |
} |
| 2005 |
if (code == mv->n) {
|
| 2006 |
//printf("MV ESC %X at %d %d\n", show_bits(&s->gb, 24), s->mb_x, s->mb_y);
|
| 2007 |
mx = get_bits(&s->gb, 6);
|
| 2008 |
my = get_bits(&s->gb, 6);
|
| 2009 |
} else {
|
| 2010 |
mx = mv->table_mvx[code]; |
| 2011 |
my = mv->table_mvy[code]; |
| 2012 |
} |
| 2013 |
|
| 2014 |
mx += *mx_ptr - 32;
|
| 2015 |
my += *my_ptr - 32;
|
| 2016 |
/* WARNING : they do not do exactly modulo encoding */
|
| 2017 |
if (mx <= -64) |
| 2018 |
mx += 64;
|
| 2019 |
else if (mx >= 64) |
| 2020 |
mx -= 64;
|
| 2021 |
|
| 2022 |
if (my <= -64) |
| 2023 |
my += 64;
|
| 2024 |
else if (my >= 64) |
| 2025 |
my -= 64;
|
| 2026 |
*mx_ptr = mx; |
| 2027 |
*my_ptr = my; |
| 2028 |
return 0; |
| 2029 |
} |
| 2030 |
|
| 2031 |
/* cleanest way to support it
|
| 2032 |
* there is too much shared between versions so that we cant have 1 file per version & 1 common
|
| 2033 |
* as allmost everything would be in the common file
|
| 2034 |
*/
|
| 2035 |
#include "wmv2.c" |