ffmpeg / libavcodec / mpeg12.c @ d375c104
History | View | Annotate | Download (90.5 KB)
| 1 |
/*
|
|---|---|
| 2 |
* MPEG-1/2 decoder
|
| 3 |
* Copyright (c) 2000,2001 Fabrice Bellard
|
| 4 |
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
|
| 5 |
*
|
| 6 |
* This file is part of FFmpeg.
|
| 7 |
*
|
| 8 |
* FFmpeg is free software; you can redistribute it and/or
|
| 9 |
* modify it under the terms of the GNU Lesser General Public
|
| 10 |
* License as published by the Free Software Foundation; either
|
| 11 |
* version 2.1 of the License, or (at your option) any later version.
|
| 12 |
*
|
| 13 |
* FFmpeg is distributed in the hope that it will be useful,
|
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 16 |
* Lesser General Public License for more details.
|
| 17 |
*
|
| 18 |
* You should have received a copy of the GNU Lesser General Public
|
| 19 |
* License along with FFmpeg; if not, write to the Free Software
|
| 20 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
| 21 |
*/
|
| 22 |
|
| 23 |
/**
|
| 24 |
* @file
|
| 25 |
* MPEG-1/2 decoder
|
| 26 |
*/
|
| 27 |
|
| 28 |
//#define DEBUG
|
| 29 |
#include "internal.h" |
| 30 |
#include "avcodec.h" |
| 31 |
#include "dsputil.h" |
| 32 |
#include "mpegvideo.h" |
| 33 |
|
| 34 |
#include "mpeg12.h" |
| 35 |
#include "mpeg12data.h" |
| 36 |
#include "mpeg12decdata.h" |
| 37 |
#include "bytestream.h" |
| 38 |
#include "vdpau_internal.h" |
| 39 |
#include "xvmc_internal.h" |
| 40 |
#include "thread.h" |
| 41 |
|
| 42 |
//#undef NDEBUG
|
| 43 |
//#include <assert.h>
|
| 44 |
|
| 45 |
|
| 46 |
#define MV_VLC_BITS 9 |
| 47 |
#define MBINCR_VLC_BITS 9 |
| 48 |
#define MB_PAT_VLC_BITS 9 |
| 49 |
#define MB_PTYPE_VLC_BITS 6 |
| 50 |
#define MB_BTYPE_VLC_BITS 6 |
| 51 |
|
| 52 |
static inline int mpeg1_decode_block_intra(MpegEncContext *s, |
| 53 |
DCTELEM *block, |
| 54 |
int n);
|
| 55 |
static inline int mpeg1_decode_block_inter(MpegEncContext *s, |
| 56 |
DCTELEM *block, |
| 57 |
int n);
|
| 58 |
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n); |
| 59 |
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, |
| 60 |
DCTELEM *block, |
| 61 |
int n);
|
| 62 |
static inline int mpeg2_decode_block_intra(MpegEncContext *s, |
| 63 |
DCTELEM *block, |
| 64 |
int n);
|
| 65 |
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n); |
| 66 |
static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n); |
| 67 |
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred); |
| 68 |
static void exchange_uv(MpegEncContext *s); |
| 69 |
|
| 70 |
static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = { |
| 71 |
PIX_FMT_XVMC_MPEG2_IDCT, |
| 72 |
PIX_FMT_XVMC_MPEG2_MC, |
| 73 |
PIX_FMT_NONE}; |
| 74 |
|
| 75 |
uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
| 76 |
|
| 77 |
|
| 78 |
#define INIT_2D_VLC_RL(rl, static_size)\
|
| 79 |
{\
|
| 80 |
static RL_VLC_ELEM rl_vlc_table[static_size];\
|
| 81 |
INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
|
| 82 |
&rl.table_vlc[0][1], 4, 2,\ |
| 83 |
&rl.table_vlc[0][0], 4, 2, static_size);\ |
| 84 |
\ |
| 85 |
rl.rl_vlc[0]= rl_vlc_table;\
|
| 86 |
init_2d_vlc_rl(&rl);\ |
| 87 |
} |
| 88 |
|
| 89 |
static void init_2d_vlc_rl(RLTable *rl) |
| 90 |
{
|
| 91 |
int i;
|
| 92 |
|
| 93 |
for(i=0; i<rl->vlc.table_size; i++){ |
| 94 |
int code= rl->vlc.table[i][0]; |
| 95 |
int len = rl->vlc.table[i][1]; |
| 96 |
int level, run;
|
| 97 |
|
| 98 |
if(len==0){ // illegal code |
| 99 |
run= 65;
|
| 100 |
level= MAX_LEVEL; |
| 101 |
}else if(len<0){ //more bits needed |
| 102 |
run= 0;
|
| 103 |
level= code; |
| 104 |
}else{
|
| 105 |
if(code==rl->n){ //esc |
| 106 |
run= 65;
|
| 107 |
level= 0;
|
| 108 |
}else if(code==rl->n+1){ //eob |
| 109 |
run= 0;
|
| 110 |
level= 127;
|
| 111 |
}else{
|
| 112 |
run= rl->table_run [code] + 1;
|
| 113 |
level= rl->table_level[code]; |
| 114 |
} |
| 115 |
} |
| 116 |
rl->rl_vlc[0][i].len= len;
|
| 117 |
rl->rl_vlc[0][i].level= level;
|
| 118 |
rl->rl_vlc[0][i].run= run;
|
| 119 |
} |
| 120 |
} |
| 121 |
|
| 122 |
void ff_mpeg12_common_init(MpegEncContext *s)
|
| 123 |
{
|
| 124 |
|
| 125 |
s->y_dc_scale_table= |
| 126 |
s->c_dc_scale_table= ff_mpeg2_dc_scale_table[s->intra_dc_precision]; |
| 127 |
|
| 128 |
} |
| 129 |
|
| 130 |
void ff_mpeg1_clean_buffers(MpegEncContext *s){
|
| 131 |
s->last_dc[0] = 1 << (7 + s->intra_dc_precision); |
| 132 |
s->last_dc[1] = s->last_dc[0]; |
| 133 |
s->last_dc[2] = s->last_dc[0]; |
| 134 |
memset(s->last_mv, 0, sizeof(s->last_mv)); |
| 135 |
} |
| 136 |
|
| 137 |
|
| 138 |
/******************************************/
|
| 139 |
/* decoding */
|
| 140 |
|
| 141 |
VLC ff_dc_lum_vlc; |
| 142 |
VLC ff_dc_chroma_vlc; |
| 143 |
|
| 144 |
static VLC mv_vlc;
|
| 145 |
static VLC mbincr_vlc;
|
| 146 |
static VLC mb_ptype_vlc;
|
| 147 |
static VLC mb_btype_vlc;
|
| 148 |
static VLC mb_pat_vlc;
|
| 149 |
|
| 150 |
av_cold void ff_mpeg12_init_vlcs(void) |
| 151 |
{
|
| 152 |
static int done = 0; |
| 153 |
|
| 154 |
if (!done) {
|
| 155 |
done = 1;
|
| 156 |
|
| 157 |
INIT_VLC_STATIC(&ff_dc_lum_vlc, DC_VLC_BITS, 12,
|
| 158 |
ff_mpeg12_vlc_dc_lum_bits, 1, 1, |
| 159 |
ff_mpeg12_vlc_dc_lum_code, 2, 2, 512); |
| 160 |
INIT_VLC_STATIC(&ff_dc_chroma_vlc, DC_VLC_BITS, 12,
|
| 161 |
ff_mpeg12_vlc_dc_chroma_bits, 1, 1, |
| 162 |
ff_mpeg12_vlc_dc_chroma_code, 2, 2, 514); |
| 163 |
INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 17,
|
| 164 |
&ff_mpeg12_mbMotionVectorTable[0][1], 2, 1, |
| 165 |
&ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 518); |
| 166 |
INIT_VLC_STATIC(&mbincr_vlc, MBINCR_VLC_BITS, 36,
|
| 167 |
&ff_mpeg12_mbAddrIncrTable[0][1], 2, 1, |
| 168 |
&ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 538); |
| 169 |
INIT_VLC_STATIC(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
|
| 170 |
&ff_mpeg12_mbPatTable[0][1], 2, 1, |
| 171 |
&ff_mpeg12_mbPatTable[0][0], 2, 1, 512); |
| 172 |
|
| 173 |
INIT_VLC_STATIC(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
|
| 174 |
&table_mb_ptype[0][1], 2, 1, |
| 175 |
&table_mb_ptype[0][0], 2, 1, 64); |
| 176 |
INIT_VLC_STATIC(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
|
| 177 |
&table_mb_btype[0][1], 2, 1, |
| 178 |
&table_mb_btype[0][0], 2, 1, 64); |
| 179 |
init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
|
| 180 |
init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
|
| 181 |
|
| 182 |
INIT_2D_VLC_RL(ff_rl_mpeg1, 680);
|
| 183 |
INIT_2D_VLC_RL(ff_rl_mpeg2, 674);
|
| 184 |
} |
| 185 |
} |
| 186 |
|
| 187 |
static inline int get_dmv(MpegEncContext *s) |
| 188 |
{
|
| 189 |
if(get_bits1(&s->gb))
|
| 190 |
return 1 - (get_bits1(&s->gb) << 1); |
| 191 |
else
|
| 192 |
return 0; |
| 193 |
} |
| 194 |
|
| 195 |
static inline int get_qscale(MpegEncContext *s) |
| 196 |
{
|
| 197 |
int qscale = get_bits(&s->gb, 5); |
| 198 |
if (s->q_scale_type) {
|
| 199 |
return non_linear_qscale[qscale];
|
| 200 |
} else {
|
| 201 |
return qscale << 1; |
| 202 |
} |
| 203 |
} |
| 204 |
|
| 205 |
/* motion type (for MPEG-2) */
|
| 206 |
#define MT_FIELD 1 |
| 207 |
#define MT_FRAME 2 |
| 208 |
#define MT_16X8 2 |
| 209 |
#define MT_DMV 3 |
| 210 |
|
| 211 |
static int mpeg_decode_mb(MpegEncContext *s, |
| 212 |
DCTELEM block[12][64]) |
| 213 |
{
|
| 214 |
int i, j, k, cbp, val, mb_type, motion_type;
|
| 215 |
const int mb_block_count = 4 + (1<< s->chroma_format); |
| 216 |
|
| 217 |
av_dlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
|
| 218 |
|
| 219 |
assert(s->mb_skipped==0);
|
| 220 |
|
| 221 |
if (s->mb_skip_run-- != 0) { |
| 222 |
if (s->pict_type == FF_P_TYPE) {
|
| 223 |
s->mb_skipped = 1;
|
| 224 |
s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; |
| 225 |
} else {
|
| 226 |
int mb_type;
|
| 227 |
|
| 228 |
if(s->mb_x)
|
| 229 |
mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
|
| 230 |
else
|
| 231 |
mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in MPEG at all |
| 232 |
if(IS_INTRA(mb_type))
|
| 233 |
return -1; |
| 234 |
|
| 235 |
s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= |
| 236 |
mb_type | MB_TYPE_SKIP; |
| 237 |
// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
|
| 238 |
|
| 239 |
if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) |
| 240 |
s->mb_skipped = 1;
|
| 241 |
} |
| 242 |
|
| 243 |
return 0; |
| 244 |
} |
| 245 |
|
| 246 |
switch(s->pict_type) {
|
| 247 |
default:
|
| 248 |
case FF_I_TYPE:
|
| 249 |
if (get_bits1(&s->gb) == 0) { |
| 250 |
if (get_bits1(&s->gb) == 0){ |
| 251 |
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
|
| 252 |
return -1; |
| 253 |
} |
| 254 |
mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; |
| 255 |
} else {
|
| 256 |
mb_type = MB_TYPE_INTRA; |
| 257 |
} |
| 258 |
break;
|
| 259 |
case FF_P_TYPE:
|
| 260 |
mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
|
| 261 |
if (mb_type < 0){ |
| 262 |
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
|
| 263 |
return -1; |
| 264 |
} |
| 265 |
mb_type = ptype2mb_type[ mb_type ]; |
| 266 |
break;
|
| 267 |
case FF_B_TYPE:
|
| 268 |
mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
|
| 269 |
if (mb_type < 0){ |
| 270 |
av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
|
| 271 |
return -1; |
| 272 |
} |
| 273 |
mb_type = btype2mb_type[ mb_type ]; |
| 274 |
break;
|
| 275 |
} |
| 276 |
av_dlog(s->avctx, "mb_type=%x\n", mb_type);
|
| 277 |
// motion_type = 0; /* avoid warning */
|
| 278 |
if (IS_INTRA(mb_type)) {
|
| 279 |
s->dsp.clear_blocks(s->block[0]);
|
| 280 |
|
| 281 |
if(!s->chroma_y_shift){
|
| 282 |
s->dsp.clear_blocks(s->block[6]);
|
| 283 |
} |
| 284 |
|
| 285 |
/* compute DCT type */
|
| 286 |
if (s->picture_structure == PICT_FRAME && //FIXME add an interlaced_dct coded var? |
| 287 |
!s->frame_pred_frame_dct) {
|
| 288 |
s->interlaced_dct = get_bits1(&s->gb); |
| 289 |
} |
| 290 |
|
| 291 |
if (IS_QUANT(mb_type))
|
| 292 |
s->qscale = get_qscale(s); |
| 293 |
|
| 294 |
if (s->concealment_motion_vectors) {
|
| 295 |
/* just parse them */
|
| 296 |
if (s->picture_structure != PICT_FRAME)
|
| 297 |
skip_bits1(&s->gb); /* field select */
|
| 298 |
|
| 299 |
s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = |
| 300 |
mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); |
| 301 |
s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = |
| 302 |
mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); |
| 303 |
|
| 304 |
skip_bits1(&s->gb); /* marker */
|
| 305 |
}else
|
| 306 |
memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ |
| 307 |
s->mb_intra = 1;
|
| 308 |
//if 1, we memcpy blocks in xvmcvideo
|
| 309 |
if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){ |
| 310 |
ff_xvmc_pack_pblocks(s,-1);//inter are always full blocks |
| 311 |
if(s->swap_uv){
|
| 312 |
exchange_uv(s); |
| 313 |
} |
| 314 |
} |
| 315 |
|
| 316 |
if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
|
| 317 |
if(s->flags2 & CODEC_FLAG2_FAST){
|
| 318 |
for(i=0;i<6;i++) { |
| 319 |
mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i); |
| 320 |
} |
| 321 |
}else{
|
| 322 |
for(i=0;i<mb_block_count;i++) { |
| 323 |
if (mpeg2_decode_block_intra(s, *s->pblocks[i], i) < 0) |
| 324 |
return -1; |
| 325 |
} |
| 326 |
} |
| 327 |
} else {
|
| 328 |
for(i=0;i<6;i++) { |
| 329 |
if (mpeg1_decode_block_intra(s, *s->pblocks[i], i) < 0) |
| 330 |
return -1; |
| 331 |
} |
| 332 |
} |
| 333 |
} else {
|
| 334 |
if (mb_type & MB_TYPE_ZERO_MV){
|
| 335 |
assert(mb_type & MB_TYPE_CBP); |
| 336 |
|
| 337 |
s->mv_dir = MV_DIR_FORWARD; |
| 338 |
if(s->picture_structure == PICT_FRAME){
|
| 339 |
if(!s->frame_pred_frame_dct)
|
| 340 |
s->interlaced_dct = get_bits1(&s->gb); |
| 341 |
s->mv_type = MV_TYPE_16X16; |
| 342 |
}else{
|
| 343 |
s->mv_type = MV_TYPE_FIELD; |
| 344 |
mb_type |= MB_TYPE_INTERLACED; |
| 345 |
s->field_select[0][0]= s->picture_structure - 1; |
| 346 |
} |
| 347 |
|
| 348 |
if (IS_QUANT(mb_type))
|
| 349 |
s->qscale = get_qscale(s); |
| 350 |
|
| 351 |
s->last_mv[0][0][0] = 0; |
| 352 |
s->last_mv[0][0][1] = 0; |
| 353 |
s->last_mv[0][1][0] = 0; |
| 354 |
s->last_mv[0][1][1] = 0; |
| 355 |
s->mv[0][0][0] = 0; |
| 356 |
s->mv[0][0][1] = 0; |
| 357 |
}else{
|
| 358 |
assert(mb_type & MB_TYPE_L0L1); |
| 359 |
//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
|
| 360 |
/* get additional motion vector type */
|
| 361 |
if (s->frame_pred_frame_dct)
|
| 362 |
motion_type = MT_FRAME; |
| 363 |
else{
|
| 364 |
motion_type = get_bits(&s->gb, 2);
|
| 365 |
if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
|
| 366 |
s->interlaced_dct = get_bits1(&s->gb); |
| 367 |
} |
| 368 |
|
| 369 |
if (IS_QUANT(mb_type))
|
| 370 |
s->qscale = get_qscale(s); |
| 371 |
|
| 372 |
/* motion vectors */
|
| 373 |
s->mv_dir= (mb_type>>13)&3; |
| 374 |
av_dlog(s->avctx, "motion_type=%d\n", motion_type);
|
| 375 |
switch(motion_type) {
|
| 376 |
case MT_FRAME: /* or MT_16X8 */ |
| 377 |
if (s->picture_structure == PICT_FRAME) {
|
| 378 |
mb_type |= MB_TYPE_16x16; |
| 379 |
s->mv_type = MV_TYPE_16X16; |
| 380 |
for(i=0;i<2;i++) { |
| 381 |
if (USES_LIST(mb_type, i)) {
|
| 382 |
/* MT_FRAME */
|
| 383 |
s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = |
| 384 |
mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); |
| 385 |
s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = |
| 386 |
mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); |
| 387 |
/* full_pel: only for MPEG-1 */
|
| 388 |
if (s->full_pel[i]){
|
| 389 |
s->mv[i][0][0] <<= 1; |
| 390 |
s->mv[i][0][1] <<= 1; |
| 391 |
} |
| 392 |
} |
| 393 |
} |
| 394 |
} else {
|
| 395 |
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; |
| 396 |
s->mv_type = MV_TYPE_16X8; |
| 397 |
for(i=0;i<2;i++) { |
| 398 |
if (USES_LIST(mb_type, i)) {
|
| 399 |
/* MT_16X8 */
|
| 400 |
for(j=0;j<2;j++) { |
| 401 |
s->field_select[i][j] = get_bits1(&s->gb); |
| 402 |
for(k=0;k<2;k++) { |
| 403 |
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], |
| 404 |
s->last_mv[i][j][k]); |
| 405 |
s->last_mv[i][j][k] = val; |
| 406 |
s->mv[i][j][k] = val; |
| 407 |
} |
| 408 |
} |
| 409 |
} |
| 410 |
} |
| 411 |
} |
| 412 |
break;
|
| 413 |
case MT_FIELD:
|
| 414 |
s->mv_type = MV_TYPE_FIELD; |
| 415 |
if (s->picture_structure == PICT_FRAME) {
|
| 416 |
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; |
| 417 |
for(i=0;i<2;i++) { |
| 418 |
if (USES_LIST(mb_type, i)) {
|
| 419 |
for(j=0;j<2;j++) { |
| 420 |
s->field_select[i][j] = get_bits1(&s->gb); |
| 421 |
val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
|
| 422 |
s->last_mv[i][j][0]);
|
| 423 |
s->last_mv[i][j][0] = val;
|
| 424 |
s->mv[i][j][0] = val;
|
| 425 |
av_dlog(s->avctx, "fmx=%d\n", val);
|
| 426 |
val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
|
| 427 |
s->last_mv[i][j][1] >> 1); |
| 428 |
s->last_mv[i][j][1] = val << 1; |
| 429 |
s->mv[i][j][1] = val;
|
| 430 |
av_dlog(s->avctx, "fmy=%d\n", val);
|
| 431 |
} |
| 432 |
} |
| 433 |
} |
| 434 |
} else {
|
| 435 |
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; |
| 436 |
for(i=0;i<2;i++) { |
| 437 |
if (USES_LIST(mb_type, i)) {
|
| 438 |
s->field_select[i][0] = get_bits1(&s->gb);
|
| 439 |
for(k=0;k<2;k++) { |
| 440 |
val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], |
| 441 |
s->last_mv[i][0][k]);
|
| 442 |
s->last_mv[i][0][k] = val;
|
| 443 |
s->last_mv[i][1][k] = val;
|
| 444 |
s->mv[i][0][k] = val;
|
| 445 |
} |
| 446 |
} |
| 447 |
} |
| 448 |
} |
| 449 |
break;
|
| 450 |
case MT_DMV:
|
| 451 |
s->mv_type = MV_TYPE_DMV; |
| 452 |
for(i=0;i<2;i++) { |
| 453 |
if (USES_LIST(mb_type, i)) {
|
| 454 |
int dmx, dmy, mx, my, m;
|
| 455 |
const int my_shift= s->picture_structure == PICT_FRAME; |
| 456 |
|
| 457 |
mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
|
| 458 |
s->last_mv[i][0][0]); |
| 459 |
s->last_mv[i][0][0] = mx; |
| 460 |
s->last_mv[i][1][0] = mx; |
| 461 |
dmx = get_dmv(s); |
| 462 |
my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
|
| 463 |
s->last_mv[i][0][1] >> my_shift); |
| 464 |
dmy = get_dmv(s); |
| 465 |
|
| 466 |
|
| 467 |
s->last_mv[i][0][1] = my<<my_shift; |
| 468 |
s->last_mv[i][1][1] = my<<my_shift; |
| 469 |
|
| 470 |
s->mv[i][0][0] = mx; |
| 471 |
s->mv[i][0][1] = my; |
| 472 |
s->mv[i][1][0] = mx;//not used |
| 473 |
s->mv[i][1][1] = my;//not used |
| 474 |
|
| 475 |
if (s->picture_structure == PICT_FRAME) {
|
| 476 |
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; |
| 477 |
|
| 478 |
//m = 1 + 2 * s->top_field_first;
|
| 479 |
m = s->top_field_first ? 1 : 3; |
| 480 |
|
| 481 |
/* top -> top pred */
|
| 482 |
s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; |
| 483 |
s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; |
| 484 |
m = 4 - m;
|
| 485 |
s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; |
| 486 |
s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; |
| 487 |
} else {
|
| 488 |
mb_type |= MB_TYPE_16x16; |
| 489 |
|
| 490 |
s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; |
| 491 |
s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; |
| 492 |
if(s->picture_structure == PICT_TOP_FIELD)
|
| 493 |
s->mv[i][2][1]--; |
| 494 |
else
|
| 495 |
s->mv[i][2][1]++; |
| 496 |
} |
| 497 |
} |
| 498 |
} |
| 499 |
break;
|
| 500 |
default:
|
| 501 |
av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
|
| 502 |
return -1; |
| 503 |
} |
| 504 |
} |
| 505 |
|
| 506 |
s->mb_intra = 0;
|
| 507 |
if (HAS_CBP(mb_type)) {
|
| 508 |
s->dsp.clear_blocks(s->block[0]);
|
| 509 |
|
| 510 |
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
|
| 511 |
if(mb_block_count > 6){ |
| 512 |
cbp<<= mb_block_count-6;
|
| 513 |
cbp |= get_bits(&s->gb, mb_block_count-6);
|
| 514 |
s->dsp.clear_blocks(s->block[6]);
|
| 515 |
} |
| 516 |
if (cbp <= 0){ |
| 517 |
av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
|
| 518 |
return -1; |
| 519 |
} |
| 520 |
|
| 521 |
//if 1, we memcpy blocks in xvmcvideo
|
| 522 |
if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1){ |
| 523 |
ff_xvmc_pack_pblocks(s,cbp); |
| 524 |
if(s->swap_uv){
|
| 525 |
exchange_uv(s); |
| 526 |
} |
| 527 |
} |
| 528 |
|
| 529 |
if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
|
| 530 |
if(s->flags2 & CODEC_FLAG2_FAST){
|
| 531 |
for(i=0;i<6;i++) { |
| 532 |
if(cbp & 32) { |
| 533 |
mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i); |
| 534 |
} else {
|
| 535 |
s->block_last_index[i] = -1;
|
| 536 |
} |
| 537 |
cbp+=cbp; |
| 538 |
} |
| 539 |
}else{
|
| 540 |
cbp<<= 12-mb_block_count;
|
| 541 |
|
| 542 |
for(i=0;i<mb_block_count;i++) { |
| 543 |
if ( cbp & (1<<11) ) { |
| 544 |
if (mpeg2_decode_block_non_intra(s, *s->pblocks[i], i) < 0) |
| 545 |
return -1; |
| 546 |
} else {
|
| 547 |
s->block_last_index[i] = -1;
|
| 548 |
} |
| 549 |
cbp+=cbp; |
| 550 |
} |
| 551 |
} |
| 552 |
} else {
|
| 553 |
if(s->flags2 & CODEC_FLAG2_FAST){
|
| 554 |
for(i=0;i<6;i++) { |
| 555 |
if (cbp & 32) { |
| 556 |
mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i); |
| 557 |
} else {
|
| 558 |
s->block_last_index[i] = -1;
|
| 559 |
} |
| 560 |
cbp+=cbp; |
| 561 |
} |
| 562 |
}else{
|
| 563 |
for(i=0;i<6;i++) { |
| 564 |
if (cbp & 32) { |
| 565 |
if (mpeg1_decode_block_inter(s, *s->pblocks[i], i) < 0) |
| 566 |
return -1; |
| 567 |
} else {
|
| 568 |
s->block_last_index[i] = -1;
|
| 569 |
} |
| 570 |
cbp+=cbp; |
| 571 |
} |
| 572 |
} |
| 573 |
} |
| 574 |
}else{
|
| 575 |
for(i=0;i<12;i++) |
| 576 |
s->block_last_index[i] = -1;
|
| 577 |
} |
| 578 |
} |
| 579 |
|
| 580 |
s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type; |
| 581 |
|
| 582 |
return 0; |
| 583 |
} |
| 584 |
|
| 585 |
/* as H.263, but only 17 codes */
|
| 586 |
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) |
| 587 |
{
|
| 588 |
int code, sign, val, l, shift;
|
| 589 |
|
| 590 |
code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
|
| 591 |
if (code == 0) { |
| 592 |
return pred;
|
| 593 |
} |
| 594 |
if (code < 0) { |
| 595 |
return 0xffff; |
| 596 |
} |
| 597 |
|
| 598 |
sign = get_bits1(&s->gb); |
| 599 |
shift = fcode - 1;
|
| 600 |
val = code; |
| 601 |
if (shift) {
|
| 602 |
val = (val - 1) << shift;
|
| 603 |
val |= get_bits(&s->gb, shift); |
| 604 |
val++; |
| 605 |
} |
| 606 |
if (sign)
|
| 607 |
val = -val; |
| 608 |
val += pred; |
| 609 |
|
| 610 |
/* modulo decoding */
|
| 611 |
l= INT_BIT - 5 - shift;
|
| 612 |
val = (val<<l)>>l; |
| 613 |
return val;
|
| 614 |
} |
| 615 |
|
| 616 |
static inline int mpeg1_decode_block_intra(MpegEncContext *s, |
| 617 |
DCTELEM *block, |
| 618 |
int n)
|
| 619 |
{
|
| 620 |
int level, dc, diff, i, j, run;
|
| 621 |
int component;
|
| 622 |
RLTable *rl = &ff_rl_mpeg1; |
| 623 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 624 |
const uint16_t *quant_matrix= s->intra_matrix;
|
| 625 |
const int qscale= s->qscale; |
| 626 |
|
| 627 |
/* DC coefficient */
|
| 628 |
component = (n <= 3 ? 0 : n - 4 + 1); |
| 629 |
diff = decode_dc(&s->gb, component); |
| 630 |
if (diff >= 0xffff) |
| 631 |
return -1; |
| 632 |
dc = s->last_dc[component]; |
| 633 |
dc += diff; |
| 634 |
s->last_dc[component] = dc; |
| 635 |
block[0] = dc*quant_matrix[0]; |
| 636 |
av_dlog(s->avctx, "dc=%d diff=%d\n", dc, diff);
|
| 637 |
i = 0;
|
| 638 |
{
|
| 639 |
OPEN_READER(re, &s->gb); |
| 640 |
/* now quantify & encode AC coefficients */
|
| 641 |
for(;;) {
|
| 642 |
UPDATE_CACHE(re, &s->gb); |
| 643 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 644 |
|
| 645 |
if(level == 127){ |
| 646 |
break;
|
| 647 |
} else if(level != 0) { |
| 648 |
i += run; |
| 649 |
j = scantable[i]; |
| 650 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 651 |
level= (level-1)|1; |
| 652 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 653 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 654 |
} else {
|
| 655 |
/* escape */
|
| 656 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 657 |
UPDATE_CACHE(re, &s->gb); |
| 658 |
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); |
| 659 |
if (level == -128) { |
| 660 |
level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); |
| 661 |
} else if (level == 0) { |
| 662 |
level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); |
| 663 |
} |
| 664 |
i += run; |
| 665 |
j = scantable[i]; |
| 666 |
if(level<0){ |
| 667 |
level= -level; |
| 668 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 669 |
level= (level-1)|1; |
| 670 |
level= -level; |
| 671 |
}else{
|
| 672 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 673 |
level= (level-1)|1; |
| 674 |
} |
| 675 |
} |
| 676 |
if (i > 63){ |
| 677 |
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 678 |
return -1; |
| 679 |
} |
| 680 |
|
| 681 |
block[j] = level; |
| 682 |
} |
| 683 |
CLOSE_READER(re, &s->gb); |
| 684 |
} |
| 685 |
s->block_last_index[n] = i; |
| 686 |
return 0; |
| 687 |
} |
| 688 |
|
| 689 |
int ff_mpeg1_decode_block_intra(MpegEncContext *s,
|
| 690 |
DCTELEM *block, |
| 691 |
int n)
|
| 692 |
{
|
| 693 |
return mpeg1_decode_block_intra(s, block, n);
|
| 694 |
} |
| 695 |
|
| 696 |
static inline int mpeg1_decode_block_inter(MpegEncContext *s, |
| 697 |
DCTELEM *block, |
| 698 |
int n)
|
| 699 |
{
|
| 700 |
int level, i, j, run;
|
| 701 |
RLTable *rl = &ff_rl_mpeg1; |
| 702 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 703 |
const uint16_t *quant_matrix= s->inter_matrix;
|
| 704 |
const int qscale= s->qscale; |
| 705 |
|
| 706 |
{
|
| 707 |
OPEN_READER(re, &s->gb); |
| 708 |
i = -1;
|
| 709 |
// special case for first coefficient, no need to add second VLC table
|
| 710 |
UPDATE_CACHE(re, &s->gb); |
| 711 |
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { |
| 712 |
level= (3*qscale*quant_matrix[0])>>5; |
| 713 |
level= (level-1)|1; |
| 714 |
if(GET_CACHE(re, &s->gb)&0x40000000) |
| 715 |
level= -level; |
| 716 |
block[0] = level;
|
| 717 |
i++; |
| 718 |
SKIP_BITS(re, &s->gb, 2);
|
| 719 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 720 |
goto end;
|
| 721 |
} |
| 722 |
/* now quantify & encode AC coefficients */
|
| 723 |
for(;;) {
|
| 724 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 725 |
|
| 726 |
if(level != 0) { |
| 727 |
i += run; |
| 728 |
j = scantable[i]; |
| 729 |
level= ((level*2+1)*qscale*quant_matrix[j])>>5; |
| 730 |
level= (level-1)|1; |
| 731 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 732 |
SKIP_BITS(re, &s->gb, 1);
|
| 733 |
} else {
|
| 734 |
/* escape */
|
| 735 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 736 |
UPDATE_CACHE(re, &s->gb); |
| 737 |
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); |
| 738 |
if (level == -128) { |
| 739 |
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); |
| 740 |
} else if (level == 0) { |
| 741 |
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); |
| 742 |
} |
| 743 |
i += run; |
| 744 |
j = scantable[i]; |
| 745 |
if(level<0){ |
| 746 |
level= -level; |
| 747 |
level= ((level*2+1)*qscale*quant_matrix[j])>>5; |
| 748 |
level= (level-1)|1; |
| 749 |
level= -level; |
| 750 |
}else{
|
| 751 |
level= ((level*2+1)*qscale*quant_matrix[j])>>5; |
| 752 |
level= (level-1)|1; |
| 753 |
} |
| 754 |
} |
| 755 |
if (i > 63){ |
| 756 |
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 757 |
return -1; |
| 758 |
} |
| 759 |
|
| 760 |
block[j] = level; |
| 761 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 762 |
break;
|
| 763 |
UPDATE_CACHE(re, &s->gb); |
| 764 |
} |
| 765 |
end:
|
| 766 |
LAST_SKIP_BITS(re, &s->gb, 2);
|
| 767 |
CLOSE_READER(re, &s->gb); |
| 768 |
} |
| 769 |
s->block_last_index[n] = i; |
| 770 |
return 0; |
| 771 |
} |
| 772 |
|
| 773 |
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n) |
| 774 |
{
|
| 775 |
int level, i, j, run;
|
| 776 |
RLTable *rl = &ff_rl_mpeg1; |
| 777 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 778 |
const int qscale= s->qscale; |
| 779 |
|
| 780 |
{
|
| 781 |
OPEN_READER(re, &s->gb); |
| 782 |
i = -1;
|
| 783 |
// special case for first coefficient, no need to add second VLC table
|
| 784 |
UPDATE_CACHE(re, &s->gb); |
| 785 |
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { |
| 786 |
level= (3*qscale)>>1; |
| 787 |
level= (level-1)|1; |
| 788 |
if(GET_CACHE(re, &s->gb)&0x40000000) |
| 789 |
level= -level; |
| 790 |
block[0] = level;
|
| 791 |
i++; |
| 792 |
SKIP_BITS(re, &s->gb, 2);
|
| 793 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 794 |
goto end;
|
| 795 |
} |
| 796 |
|
| 797 |
/* now quantify & encode AC coefficients */
|
| 798 |
for(;;) {
|
| 799 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 800 |
|
| 801 |
if(level != 0) { |
| 802 |
i += run; |
| 803 |
j = scantable[i]; |
| 804 |
level= ((level*2+1)*qscale)>>1; |
| 805 |
level= (level-1)|1; |
| 806 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 807 |
SKIP_BITS(re, &s->gb, 1);
|
| 808 |
} else {
|
| 809 |
/* escape */
|
| 810 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 811 |
UPDATE_CACHE(re, &s->gb); |
| 812 |
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); |
| 813 |
if (level == -128) { |
| 814 |
level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); |
| 815 |
} else if (level == 0) { |
| 816 |
level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); |
| 817 |
} |
| 818 |
i += run; |
| 819 |
j = scantable[i]; |
| 820 |
if(level<0){ |
| 821 |
level= -level; |
| 822 |
level= ((level*2+1)*qscale)>>1; |
| 823 |
level= (level-1)|1; |
| 824 |
level= -level; |
| 825 |
}else{
|
| 826 |
level= ((level*2+1)*qscale)>>1; |
| 827 |
level= (level-1)|1; |
| 828 |
} |
| 829 |
} |
| 830 |
|
| 831 |
block[j] = level; |
| 832 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 833 |
break;
|
| 834 |
UPDATE_CACHE(re, &s->gb); |
| 835 |
} |
| 836 |
end:
|
| 837 |
LAST_SKIP_BITS(re, &s->gb, 2);
|
| 838 |
CLOSE_READER(re, &s->gb); |
| 839 |
} |
| 840 |
s->block_last_index[n] = i; |
| 841 |
return 0; |
| 842 |
} |
| 843 |
|
| 844 |
|
| 845 |
static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, |
| 846 |
DCTELEM *block, |
| 847 |
int n)
|
| 848 |
{
|
| 849 |
int level, i, j, run;
|
| 850 |
RLTable *rl = &ff_rl_mpeg1; |
| 851 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 852 |
const uint16_t *quant_matrix;
|
| 853 |
const int qscale= s->qscale; |
| 854 |
int mismatch;
|
| 855 |
|
| 856 |
mismatch = 1;
|
| 857 |
|
| 858 |
{
|
| 859 |
OPEN_READER(re, &s->gb); |
| 860 |
i = -1;
|
| 861 |
if (n < 4) |
| 862 |
quant_matrix = s->inter_matrix; |
| 863 |
else
|
| 864 |
quant_matrix = s->chroma_inter_matrix; |
| 865 |
|
| 866 |
// special case for first coefficient, no need to add second VLC table
|
| 867 |
UPDATE_CACHE(re, &s->gb); |
| 868 |
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { |
| 869 |
level= (3*qscale*quant_matrix[0])>>5; |
| 870 |
if(GET_CACHE(re, &s->gb)&0x40000000) |
| 871 |
level= -level; |
| 872 |
block[0] = level;
|
| 873 |
mismatch ^= level; |
| 874 |
i++; |
| 875 |
SKIP_BITS(re, &s->gb, 2);
|
| 876 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 877 |
goto end;
|
| 878 |
} |
| 879 |
|
| 880 |
/* now quantify & encode AC coefficients */
|
| 881 |
for(;;) {
|
| 882 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 883 |
|
| 884 |
if(level != 0) { |
| 885 |
i += run; |
| 886 |
j = scantable[i]; |
| 887 |
level= ((level*2+1)*qscale*quant_matrix[j])>>5; |
| 888 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 889 |
SKIP_BITS(re, &s->gb, 1);
|
| 890 |
} else {
|
| 891 |
/* escape */
|
| 892 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 893 |
UPDATE_CACHE(re, &s->gb); |
| 894 |
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); |
| 895 |
|
| 896 |
i += run; |
| 897 |
j = scantable[i]; |
| 898 |
if(level<0){ |
| 899 |
level= ((-level*2+1)*qscale*quant_matrix[j])>>5; |
| 900 |
level= -level; |
| 901 |
}else{
|
| 902 |
level= ((level*2+1)*qscale*quant_matrix[j])>>5; |
| 903 |
} |
| 904 |
} |
| 905 |
if (i > 63){ |
| 906 |
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 907 |
return -1; |
| 908 |
} |
| 909 |
|
| 910 |
mismatch ^= level; |
| 911 |
block[j] = level; |
| 912 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 913 |
break;
|
| 914 |
UPDATE_CACHE(re, &s->gb); |
| 915 |
} |
| 916 |
end:
|
| 917 |
LAST_SKIP_BITS(re, &s->gb, 2);
|
| 918 |
CLOSE_READER(re, &s->gb); |
| 919 |
} |
| 920 |
block[63] ^= (mismatch & 1); |
| 921 |
|
| 922 |
s->block_last_index[n] = i; |
| 923 |
return 0; |
| 924 |
} |
| 925 |
|
| 926 |
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, |
| 927 |
DCTELEM *block, |
| 928 |
int n)
|
| 929 |
{
|
| 930 |
int level, i, j, run;
|
| 931 |
RLTable *rl = &ff_rl_mpeg1; |
| 932 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 933 |
const int qscale= s->qscale; |
| 934 |
OPEN_READER(re, &s->gb); |
| 935 |
i = -1;
|
| 936 |
|
| 937 |
// special case for first coefficient, no need to add second VLC table
|
| 938 |
UPDATE_CACHE(re, &s->gb); |
| 939 |
if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { |
| 940 |
level= (3*qscale)>>1; |
| 941 |
if(GET_CACHE(re, &s->gb)&0x40000000) |
| 942 |
level= -level; |
| 943 |
block[0] = level;
|
| 944 |
i++; |
| 945 |
SKIP_BITS(re, &s->gb, 2);
|
| 946 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 947 |
goto end;
|
| 948 |
} |
| 949 |
|
| 950 |
/* now quantify & encode AC coefficients */
|
| 951 |
for(;;) {
|
| 952 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 953 |
|
| 954 |
if(level != 0) { |
| 955 |
i += run; |
| 956 |
j = scantable[i]; |
| 957 |
level= ((level*2+1)*qscale)>>1; |
| 958 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 959 |
SKIP_BITS(re, &s->gb, 1);
|
| 960 |
} else {
|
| 961 |
/* escape */
|
| 962 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 963 |
UPDATE_CACHE(re, &s->gb); |
| 964 |
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); |
| 965 |
|
| 966 |
i += run; |
| 967 |
j = scantable[i]; |
| 968 |
if(level<0){ |
| 969 |
level= ((-level*2+1)*qscale)>>1; |
| 970 |
level= -level; |
| 971 |
}else{
|
| 972 |
level= ((level*2+1)*qscale)>>1; |
| 973 |
} |
| 974 |
} |
| 975 |
|
| 976 |
block[j] = level; |
| 977 |
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) |
| 978 |
break;
|
| 979 |
UPDATE_CACHE(re, &s->gb); |
| 980 |
} |
| 981 |
end:
|
| 982 |
LAST_SKIP_BITS(re, &s->gb, 2);
|
| 983 |
CLOSE_READER(re, &s->gb); |
| 984 |
s->block_last_index[n] = i; |
| 985 |
return 0; |
| 986 |
} |
| 987 |
|
| 988 |
|
| 989 |
static inline int mpeg2_decode_block_intra(MpegEncContext *s, |
| 990 |
DCTELEM *block, |
| 991 |
int n)
|
| 992 |
{
|
| 993 |
int level, dc, diff, i, j, run;
|
| 994 |
int component;
|
| 995 |
RLTable *rl; |
| 996 |
uint8_t * const scantable= s->intra_scantable.permutated;
|
| 997 |
const uint16_t *quant_matrix;
|
| 998 |
const int qscale= s->qscale; |
| 999 |
int mismatch;
|
| 1000 |
|
| 1001 |
/* DC coefficient */
|
| 1002 |
if (n < 4){ |
| 1003 |
quant_matrix = s->intra_matrix; |
| 1004 |
component = 0;
|
| 1005 |
}else{
|
| 1006 |
quant_matrix = s->chroma_intra_matrix; |
| 1007 |
component = (n&1) + 1; |
| 1008 |
} |
| 1009 |
diff = decode_dc(&s->gb, component); |
| 1010 |
if (diff >= 0xffff) |
| 1011 |
return -1; |
| 1012 |
dc = s->last_dc[component]; |
| 1013 |
dc += diff; |
| 1014 |
s->last_dc[component] = dc; |
| 1015 |
block[0] = dc << (3 - s->intra_dc_precision); |
| 1016 |
av_dlog(s->avctx, "dc=%d\n", block[0]); |
| 1017 |
mismatch = block[0] ^ 1; |
| 1018 |
i = 0;
|
| 1019 |
if (s->intra_vlc_format)
|
| 1020 |
rl = &ff_rl_mpeg2; |
| 1021 |
else
|
| 1022 |
rl = &ff_rl_mpeg1; |
| 1023 |
|
| 1024 |
{
|
| 1025 |
OPEN_READER(re, &s->gb); |
| 1026 |
/* now quantify & encode AC coefficients */
|
| 1027 |
for(;;) {
|
| 1028 |
UPDATE_CACHE(re, &s->gb); |
| 1029 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 1030 |
|
| 1031 |
if(level == 127){ |
| 1032 |
break;
|
| 1033 |
} else if(level != 0) { |
| 1034 |
i += run; |
| 1035 |
j = scantable[i]; |
| 1036 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 1037 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1038 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1039 |
} else {
|
| 1040 |
/* escape */
|
| 1041 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 1042 |
UPDATE_CACHE(re, &s->gb); |
| 1043 |
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); |
| 1044 |
i += run; |
| 1045 |
j = scantable[i]; |
| 1046 |
if(level<0){ |
| 1047 |
level= (-level*qscale*quant_matrix[j])>>4;
|
| 1048 |
level= -level; |
| 1049 |
}else{
|
| 1050 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 1051 |
} |
| 1052 |
} |
| 1053 |
if (i > 63){ |
| 1054 |
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
| 1055 |
return -1; |
| 1056 |
} |
| 1057 |
|
| 1058 |
mismatch^= level; |
| 1059 |
block[j] = level; |
| 1060 |
} |
| 1061 |
CLOSE_READER(re, &s->gb); |
| 1062 |
} |
| 1063 |
block[63]^= mismatch&1; |
| 1064 |
|
| 1065 |
s->block_last_index[n] = i; |
| 1066 |
return 0; |
| 1067 |
} |
| 1068 |
|
| 1069 |
static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, |
| 1070 |
DCTELEM *block, |
| 1071 |
int n)
|
| 1072 |
{
|
| 1073 |
int level, dc, diff, j, run;
|
| 1074 |
int component;
|
| 1075 |
RLTable *rl; |
| 1076 |
uint8_t * scantable= s->intra_scantable.permutated; |
| 1077 |
const uint16_t *quant_matrix;
|
| 1078 |
const int qscale= s->qscale; |
| 1079 |
|
| 1080 |
/* DC coefficient */
|
| 1081 |
if (n < 4){ |
| 1082 |
quant_matrix = s->intra_matrix; |
| 1083 |
component = 0;
|
| 1084 |
}else{
|
| 1085 |
quant_matrix = s->chroma_intra_matrix; |
| 1086 |
component = (n&1) + 1; |
| 1087 |
} |
| 1088 |
diff = decode_dc(&s->gb, component); |
| 1089 |
if (diff >= 0xffff) |
| 1090 |
return -1; |
| 1091 |
dc = s->last_dc[component]; |
| 1092 |
dc += diff; |
| 1093 |
s->last_dc[component] = dc; |
| 1094 |
block[0] = dc << (3 - s->intra_dc_precision); |
| 1095 |
if (s->intra_vlc_format)
|
| 1096 |
rl = &ff_rl_mpeg2; |
| 1097 |
else
|
| 1098 |
rl = &ff_rl_mpeg1; |
| 1099 |
|
| 1100 |
{
|
| 1101 |
OPEN_READER(re, &s->gb); |
| 1102 |
/* now quantify & encode AC coefficients */
|
| 1103 |
for(;;) {
|
| 1104 |
UPDATE_CACHE(re, &s->gb); |
| 1105 |
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); |
| 1106 |
|
| 1107 |
if(level == 127){ |
| 1108 |
break;
|
| 1109 |
} else if(level != 0) { |
| 1110 |
scantable += run; |
| 1111 |
j = *scantable; |
| 1112 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 1113 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| 1114 |
LAST_SKIP_BITS(re, &s->gb, 1);
|
| 1115 |
} else {
|
| 1116 |
/* escape */
|
| 1117 |
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); |
| 1118 |
UPDATE_CACHE(re, &s->gb); |
| 1119 |
level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); |
| 1120 |
scantable += run; |
| 1121 |
j = *scantable; |
| 1122 |
if(level<0){ |
| 1123 |
level= (-level*qscale*quant_matrix[j])>>4;
|
| 1124 |
level= -level; |
| 1125 |
}else{
|
| 1126 |
level= (level*qscale*quant_matrix[j])>>4;
|
| 1127 |
} |
| 1128 |
} |
| 1129 |
|
| 1130 |
block[j] = level; |
| 1131 |
} |
| 1132 |
CLOSE_READER(re, &s->gb); |
| 1133 |
} |
| 1134 |
|
| 1135 |
s->block_last_index[n] = scantable - s->intra_scantable.permutated; |
| 1136 |
return 0; |
| 1137 |
} |
| 1138 |
|
| 1139 |
typedef struct Mpeg1Context { |
| 1140 |
MpegEncContext mpeg_enc_ctx; |
| 1141 |
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ |
| 1142 |
int repeat_field; /* true if we must repeat the field */ |
| 1143 |
AVPanScan pan_scan; /**< some temporary storage for the panscan */
|
| 1144 |
int slice_count;
|
| 1145 |
int swap_uv;//indicate VCR2 |
| 1146 |
int save_aspect_info;
|
| 1147 |
int save_width, save_height, save_progressive_seq;
|
| 1148 |
AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
|
| 1149 |
int sync; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame? |
| 1150 |
} Mpeg1Context; |
| 1151 |
|
| 1152 |
static av_cold int mpeg_decode_init(AVCodecContext *avctx) |
| 1153 |
{
|
| 1154 |
Mpeg1Context *s = avctx->priv_data; |
| 1155 |
MpegEncContext *s2 = &s->mpeg_enc_ctx; |
| 1156 |
int i;
|
| 1157 |
|
| 1158 |
/* we need some permutation to store matrices,
|
| 1159 |
* until MPV_common_init() sets the real permutation. */
|
| 1160 |
for(i=0;i<64;i++) |
| 1161 |
s2->dsp.idct_permutation[i]=i; |
| 1162 |
|
| 1163 |
MPV_decode_defaults(s2); |
| 1164 |
|
| 1165 |
s->mpeg_enc_ctx.avctx= avctx; |
| 1166 |
s->mpeg_enc_ctx.flags= avctx->flags; |
| 1167 |
s->mpeg_enc_ctx.flags2= avctx->flags2; |
| 1168 |
ff_mpeg12_common_init(&s->mpeg_enc_ctx); |
| 1169 |
ff_mpeg12_init_vlcs(); |
| 1170 |
|
| 1171 |
s->mpeg_enc_ctx_allocated = 0;
|
| 1172 |
s->mpeg_enc_ctx.picture_number = 0;
|
| 1173 |
s->repeat_field = 0;
|
| 1174 |
s->mpeg_enc_ctx.codec_id= avctx->codec->id; |
| 1175 |
avctx->color_range= AVCOL_RANGE_MPEG; |
| 1176 |
if (avctx->codec->id == CODEC_ID_MPEG1VIDEO)
|
| 1177 |
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; |
| 1178 |
else
|
| 1179 |
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; |
| 1180 |
return 0; |
| 1181 |
} |
| 1182 |
|
| 1183 |
static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from) |
| 1184 |
{
|
| 1185 |
Mpeg1Context *ctx = avctx->priv_data, *ctx_from = avctx_from->priv_data; |
| 1186 |
MpegEncContext *s = &ctx->mpeg_enc_ctx, *s1 = &ctx_from->mpeg_enc_ctx; |
| 1187 |
int err;
|
| 1188 |
|
| 1189 |
if(avctx == avctx_from || !ctx_from->mpeg_enc_ctx_allocated || !s1->context_initialized)
|
| 1190 |
return 0; |
| 1191 |
|
| 1192 |
err = ff_mpeg_update_thread_context(avctx, avctx_from); |
| 1193 |
if(err) return err; |
| 1194 |
|
| 1195 |
if(!ctx->mpeg_enc_ctx_allocated)
|
| 1196 |
memcpy(s + 1, s1 + 1, sizeof(Mpeg1Context) - sizeof(MpegEncContext)); |
| 1197 |
|
| 1198 |
if(!(s->pict_type == FF_B_TYPE || s->low_delay))
|
| 1199 |
s->picture_number++; |
| 1200 |
|
| 1201 |
return 0; |
| 1202 |
} |
| 1203 |
|
| 1204 |
static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, |
| 1205 |
const uint8_t *new_perm){
|
| 1206 |
uint16_t temp_matrix[64];
|
| 1207 |
int i;
|
| 1208 |
|
| 1209 |
memcpy(temp_matrix,matrix,64*sizeof(uint16_t)); |
| 1210 |
|
| 1211 |
for(i=0;i<64;i++){ |
| 1212 |
matrix[new_perm[i]] = temp_matrix[old_perm[i]]; |
| 1213 |
} |
| 1214 |
} |
| 1215 |
|
| 1216 |
static enum PixelFormat mpeg_get_pixelformat(AVCodecContext *avctx){ |
| 1217 |
Mpeg1Context *s1 = avctx->priv_data; |
| 1218 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1219 |
|
| 1220 |
if(avctx->xvmc_acceleration)
|
| 1221 |
return avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
|
| 1222 |
else if(avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){ |
| 1223 |
if(avctx->codec_id == CODEC_ID_MPEG1VIDEO)
|
| 1224 |
return PIX_FMT_VDPAU_MPEG1;
|
| 1225 |
else
|
| 1226 |
return PIX_FMT_VDPAU_MPEG2;
|
| 1227 |
}else{
|
| 1228 |
if(s->chroma_format < 2) |
| 1229 |
return avctx->get_format(avctx,ff_hwaccel_pixfmt_list_420);
|
| 1230 |
else if(s->chroma_format == 2) |
| 1231 |
return PIX_FMT_YUV422P;
|
| 1232 |
else
|
| 1233 |
return PIX_FMT_YUV444P;
|
| 1234 |
} |
| 1235 |
} |
| 1236 |
|
| 1237 |
/* Call this function when we know all parameters.
|
| 1238 |
* It may be called in different places for MPEG-1 and MPEG-2. */
|
| 1239 |
static int mpeg_decode_postinit(AVCodecContext *avctx){ |
| 1240 |
Mpeg1Context *s1 = avctx->priv_data; |
| 1241 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1242 |
uint8_t old_permutation[64];
|
| 1243 |
|
| 1244 |
if (
|
| 1245 |
(s1->mpeg_enc_ctx_allocated == 0)||
|
| 1246 |
avctx->coded_width != s->width || |
| 1247 |
avctx->coded_height != s->height|| |
| 1248 |
s1->save_width != s->width || |
| 1249 |
s1->save_height != s->height || |
| 1250 |
s1->save_aspect_info != s->aspect_ratio_info|| |
| 1251 |
s1->save_progressive_seq != s->progressive_sequence || |
| 1252 |
0)
|
| 1253 |
{
|
| 1254 |
|
| 1255 |
if (s1->mpeg_enc_ctx_allocated) {
|
| 1256 |
ParseContext pc= s->parse_context; |
| 1257 |
s->parse_context.buffer=0;
|
| 1258 |
MPV_common_end(s); |
| 1259 |
s->parse_context= pc; |
| 1260 |
} |
| 1261 |
|
| 1262 |
if( (s->width == 0 )||(s->height == 0)) |
| 1263 |
return -2; |
| 1264 |
|
| 1265 |
avcodec_set_dimensions(avctx, s->width, s->height); |
| 1266 |
avctx->bit_rate = s->bit_rate; |
| 1267 |
s1->save_aspect_info = s->aspect_ratio_info; |
| 1268 |
s1->save_width = s->width; |
| 1269 |
s1->save_height = s->height; |
| 1270 |
s1->save_progressive_seq = s->progressive_sequence; |
| 1271 |
|
| 1272 |
/* low_delay may be forced, in this case we will have B-frames
|
| 1273 |
* that behave like P-frames. */
|
| 1274 |
avctx->has_b_frames = !(s->low_delay); |
| 1275 |
|
| 1276 |
assert((avctx->sub_id==1) == (avctx->codec_id==CODEC_ID_MPEG1VIDEO));
|
| 1277 |
if(avctx->codec_id==CODEC_ID_MPEG1VIDEO){
|
| 1278 |
//MPEG-1 fps
|
| 1279 |
avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num; |
| 1280 |
avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den; |
| 1281 |
//MPEG-1 aspect
|
| 1282 |
avctx->sample_aspect_ratio= av_d2q( |
| 1283 |
1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255); |
| 1284 |
avctx->ticks_per_frame=1;
|
| 1285 |
}else{//MPEG-2 |
| 1286 |
//MPEG-2 fps
|
| 1287 |
av_reduce( |
| 1288 |
&s->avctx->time_base.den, |
| 1289 |
&s->avctx->time_base.num, |
| 1290 |
ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num*2,
|
| 1291 |
ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, |
| 1292 |
1<<30); |
| 1293 |
avctx->ticks_per_frame=2;
|
| 1294 |
//MPEG-2 aspect
|
| 1295 |
if(s->aspect_ratio_info > 1){ |
| 1296 |
//we ignore the spec here as reality does not match the spec, see for example
|
| 1297 |
// res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
|
| 1298 |
if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) || 1){ |
| 1299 |
s->avctx->sample_aspect_ratio= |
| 1300 |
av_div_q( |
| 1301 |
ff_mpeg2_aspect[s->aspect_ratio_info], |
| 1302 |
(AVRational){s->width, s->height}
|
| 1303 |
); |
| 1304 |
}else{
|
| 1305 |
s->avctx->sample_aspect_ratio= |
| 1306 |
av_div_q( |
| 1307 |
ff_mpeg2_aspect[s->aspect_ratio_info], |
| 1308 |
(AVRational){s1->pan_scan.width, s1->pan_scan.height}
|
| 1309 |
); |
| 1310 |
} |
| 1311 |
}else{
|
| 1312 |
s->avctx->sample_aspect_ratio= |
| 1313 |
ff_mpeg2_aspect[s->aspect_ratio_info]; |
| 1314 |
} |
| 1315 |
}//MPEG-2
|
| 1316 |
|
| 1317 |
avctx->pix_fmt = mpeg_get_pixelformat(avctx); |
| 1318 |
avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); |
| 1319 |
//until then pix_fmt may be changed right after codec init
|
| 1320 |
if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ||
|
| 1321 |
avctx->hwaccel || |
| 1322 |
s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ) |
| 1323 |
if( avctx->idct_algo == FF_IDCT_AUTO )
|
| 1324 |
avctx->idct_algo = FF_IDCT_SIMPLE; |
| 1325 |
|
| 1326 |
/* Quantization matrices may need reordering
|
| 1327 |
* if DCT permutation is changed. */
|
| 1328 |
memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t)); |
| 1329 |
|
| 1330 |
if (MPV_common_init(s) < 0) |
| 1331 |
return -2; |
| 1332 |
|
| 1333 |
quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation); |
| 1334 |
quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation); |
| 1335 |
quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation); |
| 1336 |
quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation); |
| 1337 |
|
| 1338 |
s1->mpeg_enc_ctx_allocated = 1;
|
| 1339 |
} |
| 1340 |
return 0; |
| 1341 |
} |
| 1342 |
|
| 1343 |
static int mpeg1_decode_picture(AVCodecContext *avctx, |
| 1344 |
const uint8_t *buf, int buf_size) |
| 1345 |
{
|
| 1346 |
Mpeg1Context *s1 = avctx->priv_data; |
| 1347 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1348 |
int ref, f_code, vbv_delay;
|
| 1349 |
|
| 1350 |
init_get_bits(&s->gb, buf, buf_size*8);
|
| 1351 |
|
| 1352 |
ref = get_bits(&s->gb, 10); /* temporal ref */ |
| 1353 |
s->pict_type = get_bits(&s->gb, 3);
|
| 1354 |
if(s->pict_type == 0 || s->pict_type > 3) |
| 1355 |
return -1; |
| 1356 |
|
| 1357 |
vbv_delay= get_bits(&s->gb, 16);
|
| 1358 |
if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) {
|
| 1359 |
s->full_pel[0] = get_bits1(&s->gb);
|
| 1360 |
f_code = get_bits(&s->gb, 3);
|
| 1361 |
if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT) |
| 1362 |
return -1; |
| 1363 |
s->mpeg_f_code[0][0] = f_code; |
| 1364 |
s->mpeg_f_code[0][1] = f_code; |
| 1365 |
} |
| 1366 |
if (s->pict_type == FF_B_TYPE) {
|
| 1367 |
s->full_pel[1] = get_bits1(&s->gb);
|
| 1368 |
f_code = get_bits(&s->gb, 3);
|
| 1369 |
if (f_code == 0 && avctx->error_recognition >= FF_ER_COMPLIANT) |
| 1370 |
return -1; |
| 1371 |
s->mpeg_f_code[1][0] = f_code; |
| 1372 |
s->mpeg_f_code[1][1] = f_code; |
| 1373 |
} |
| 1374 |
s->current_picture.pict_type= s->pict_type; |
| 1375 |
s->current_picture.key_frame= s->pict_type == FF_I_TYPE; |
| 1376 |
|
| 1377 |
if(avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1378 |
av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
|
| 1379 |
|
| 1380 |
s->y_dc_scale = 8;
|
| 1381 |
s->c_dc_scale = 8;
|
| 1382 |
return 0; |
| 1383 |
} |
| 1384 |
|
| 1385 |
static void mpeg_decode_sequence_extension(Mpeg1Context *s1) |
| 1386 |
{
|
| 1387 |
MpegEncContext *s= &s1->mpeg_enc_ctx; |
| 1388 |
int horiz_size_ext, vert_size_ext;
|
| 1389 |
int bit_rate_ext;
|
| 1390 |
|
| 1391 |
skip_bits(&s->gb, 1); /* profile and level esc*/ |
| 1392 |
s->avctx->profile= get_bits(&s->gb, 3);
|
| 1393 |
s->avctx->level= get_bits(&s->gb, 4);
|
| 1394 |
s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
|
| 1395 |
s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ |
| 1396 |
horiz_size_ext = get_bits(&s->gb, 2);
|
| 1397 |
vert_size_ext = get_bits(&s->gb, 2);
|
| 1398 |
s->width |= (horiz_size_ext << 12);
|
| 1399 |
s->height |= (vert_size_ext << 12);
|
| 1400 |
bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ |
| 1401 |
s->bit_rate += (bit_rate_ext << 18) * 400; |
| 1402 |
skip_bits1(&s->gb); /* marker */
|
| 1403 |
s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10; |
| 1404 |
|
| 1405 |
s->low_delay = get_bits1(&s->gb); |
| 1406 |
if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; |
| 1407 |
|
| 1408 |
s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1; |
| 1409 |
s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1; |
| 1410 |
|
| 1411 |
av_dlog(s->avctx, "sequence extension\n");
|
| 1412 |
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; |
| 1413 |
s->avctx->sub_id = 2; /* indicates MPEG-2 found */ |
| 1414 |
|
| 1415 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1416 |
av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
|
| 1417 |
s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate); |
| 1418 |
|
| 1419 |
} |
| 1420 |
|
| 1421 |
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) |
| 1422 |
{
|
| 1423 |
MpegEncContext *s= &s1->mpeg_enc_ctx; |
| 1424 |
int color_description, w, h;
|
| 1425 |
|
| 1426 |
skip_bits(&s->gb, 3); /* video format */ |
| 1427 |
color_description= get_bits1(&s->gb); |
| 1428 |
if(color_description){
|
| 1429 |
s->avctx->color_primaries= get_bits(&s->gb, 8);
|
| 1430 |
s->avctx->color_trc = get_bits(&s->gb, 8);
|
| 1431 |
s->avctx->colorspace = get_bits(&s->gb, 8);
|
| 1432 |
} |
| 1433 |
w= get_bits(&s->gb, 14);
|
| 1434 |
skip_bits(&s->gb, 1); //marker |
| 1435 |
h= get_bits(&s->gb, 14);
|
| 1436 |
// remaining 3 bits are zero padding
|
| 1437 |
|
| 1438 |
s1->pan_scan.width= 16*w;
|
| 1439 |
s1->pan_scan.height=16*h;
|
| 1440 |
|
| 1441 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1442 |
av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
|
| 1443 |
} |
| 1444 |
|
| 1445 |
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) |
| 1446 |
{
|
| 1447 |
MpegEncContext *s= &s1->mpeg_enc_ctx; |
| 1448 |
int i,nofco;
|
| 1449 |
|
| 1450 |
nofco = 1;
|
| 1451 |
if(s->progressive_sequence){
|
| 1452 |
if(s->repeat_first_field){
|
| 1453 |
nofco++; |
| 1454 |
if(s->top_field_first)
|
| 1455 |
nofco++; |
| 1456 |
} |
| 1457 |
}else{
|
| 1458 |
if(s->picture_structure == PICT_FRAME){
|
| 1459 |
nofco++; |
| 1460 |
if(s->repeat_first_field)
|
| 1461 |
nofco++; |
| 1462 |
} |
| 1463 |
} |
| 1464 |
for(i=0; i<nofco; i++){ |
| 1465 |
s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16); |
| 1466 |
skip_bits(&s->gb, 1); //marker |
| 1467 |
s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16); |
| 1468 |
skip_bits(&s->gb, 1); //marker |
| 1469 |
} |
| 1470 |
|
| 1471 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1472 |
av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
|
| 1473 |
s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], |
| 1474 |
s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], |
| 1475 |
s1->pan_scan.position[2][0], s1->pan_scan.position[2][1] |
| 1476 |
); |
| 1477 |
} |
| 1478 |
|
| 1479 |
static int load_matrix(MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra){ |
| 1480 |
int i;
|
| 1481 |
|
| 1482 |
for(i=0; i<64; i++) { |
| 1483 |
int j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
|
| 1484 |
int v = get_bits(&s->gb, 8); |
| 1485 |
if(v==0){ |
| 1486 |
av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
|
| 1487 |
return -1; |
| 1488 |
} |
| 1489 |
if(intra && i==0 && v!=8){ |
| 1490 |
av_log(s->avctx, AV_LOG_ERROR, "intra matrix invalid, ignoring\n");
|
| 1491 |
v= 8; // needed by pink.mpg / issue1046 |
| 1492 |
} |
| 1493 |
matrix0[j] = v; |
| 1494 |
if(matrix1)
|
| 1495 |
matrix1[j] = v; |
| 1496 |
} |
| 1497 |
return 0; |
| 1498 |
} |
| 1499 |
|
| 1500 |
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) |
| 1501 |
{
|
| 1502 |
av_dlog(s->avctx, "matrix extension\n");
|
| 1503 |
|
| 1504 |
if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1); |
| 1505 |
if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0); |
| 1506 |
if(get_bits1(&s->gb)) load_matrix(s, s->chroma_intra_matrix, NULL , 1); |
| 1507 |
if(get_bits1(&s->gb)) load_matrix(s, s->chroma_inter_matrix, NULL , 0); |
| 1508 |
} |
| 1509 |
|
| 1510 |
static void mpeg_decode_picture_coding_extension(Mpeg1Context *s1) |
| 1511 |
{
|
| 1512 |
MpegEncContext *s= &s1->mpeg_enc_ctx; |
| 1513 |
|
| 1514 |
s->full_pel[0] = s->full_pel[1] = 0; |
| 1515 |
s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); |
| 1516 |
s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); |
| 1517 |
s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); |
| 1518 |
s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); |
| 1519 |
if(!s->pict_type && s1->mpeg_enc_ctx_allocated){
|
| 1520 |
av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code, guessing missing values\n");
|
| 1521 |
if(s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1]==15){ |
| 1522 |
if(s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15) |
| 1523 |
s->pict_type= FF_I_TYPE; |
| 1524 |
else
|
| 1525 |
s->pict_type= FF_P_TYPE; |
| 1526 |
}else
|
| 1527 |
s->pict_type= FF_B_TYPE; |
| 1528 |
s->current_picture.pict_type= s->pict_type; |
| 1529 |
s->current_picture.key_frame= s->pict_type == FF_I_TYPE; |
| 1530 |
} |
| 1531 |
s->intra_dc_precision = get_bits(&s->gb, 2);
|
| 1532 |
s->picture_structure = get_bits(&s->gb, 2);
|
| 1533 |
s->top_field_first = get_bits1(&s->gb); |
| 1534 |
s->frame_pred_frame_dct = get_bits1(&s->gb); |
| 1535 |
s->concealment_motion_vectors = get_bits1(&s->gb); |
| 1536 |
s->q_scale_type = get_bits1(&s->gb); |
| 1537 |
s->intra_vlc_format = get_bits1(&s->gb); |
| 1538 |
s->alternate_scan = get_bits1(&s->gb); |
| 1539 |
s->repeat_first_field = get_bits1(&s->gb); |
| 1540 |
s->chroma_420_type = get_bits1(&s->gb); |
| 1541 |
s->progressive_frame = get_bits1(&s->gb); |
| 1542 |
|
| 1543 |
if(s->progressive_sequence && !s->progressive_frame){
|
| 1544 |
s->progressive_frame= 1;
|
| 1545 |
av_log(s->avctx, AV_LOG_ERROR, "interlaced frame in progressive sequence, ignoring\n");
|
| 1546 |
} |
| 1547 |
|
| 1548 |
if(s->picture_structure==0 || (s->progressive_frame && s->picture_structure!=PICT_FRAME)){ |
| 1549 |
av_log(s->avctx, AV_LOG_ERROR, "picture_structure %d invalid, ignoring\n", s->picture_structure);
|
| 1550 |
s->picture_structure= PICT_FRAME; |
| 1551 |
} |
| 1552 |
|
| 1553 |
if(s->progressive_sequence && !s->frame_pred_frame_dct){
|
| 1554 |
av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
|
| 1555 |
s->frame_pred_frame_dct= 1;
|
| 1556 |
} |
| 1557 |
|
| 1558 |
if(s->picture_structure == PICT_FRAME){
|
| 1559 |
s->first_field=0;
|
| 1560 |
s->v_edge_pos= 16*s->mb_height;
|
| 1561 |
}else{
|
| 1562 |
s->first_field ^= 1;
|
| 1563 |
s->v_edge_pos= 8*s->mb_height;
|
| 1564 |
memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
|
| 1565 |
} |
| 1566 |
|
| 1567 |
if(s->alternate_scan){
|
| 1568 |
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); |
| 1569 |
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); |
| 1570 |
}else{
|
| 1571 |
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); |
| 1572 |
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); |
| 1573 |
} |
| 1574 |
|
| 1575 |
/* composite display not parsed */
|
| 1576 |
av_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
|
| 1577 |
av_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
|
| 1578 |
av_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
|
| 1579 |
av_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
|
| 1580 |
av_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
|
| 1581 |
av_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
|
| 1582 |
av_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
|
| 1583 |
av_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
|
| 1584 |
av_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
|
| 1585 |
} |
| 1586 |
|
| 1587 |
static void exchange_uv(MpegEncContext *s){ |
| 1588 |
DCTELEM (*tmp)[64];
|
| 1589 |
|
| 1590 |
tmp = s->pblocks[4];
|
| 1591 |
s->pblocks[4] = s->pblocks[5]; |
| 1592 |
s->pblocks[5] = tmp;
|
| 1593 |
} |
| 1594 |
|
| 1595 |
static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size){ |
| 1596 |
AVCodecContext *avctx= s->avctx; |
| 1597 |
Mpeg1Context *s1 = (Mpeg1Context*)s; |
| 1598 |
|
| 1599 |
/* start frame decoding */
|
| 1600 |
if(s->first_field || s->picture_structure==PICT_FRAME){
|
| 1601 |
if(MPV_frame_start(s, avctx) < 0) |
| 1602 |
return -1; |
| 1603 |
|
| 1604 |
ff_er_frame_start(s); |
| 1605 |
|
| 1606 |
/* first check if we must repeat the frame */
|
| 1607 |
s->current_picture_ptr->repeat_pict = 0;
|
| 1608 |
if (s->repeat_first_field) {
|
| 1609 |
if (s->progressive_sequence) {
|
| 1610 |
if (s->top_field_first)
|
| 1611 |
s->current_picture_ptr->repeat_pict = 4;
|
| 1612 |
else
|
| 1613 |
s->current_picture_ptr->repeat_pict = 2;
|
| 1614 |
} else if (s->progressive_frame) { |
| 1615 |
s->current_picture_ptr->repeat_pict = 1;
|
| 1616 |
} |
| 1617 |
} |
| 1618 |
|
| 1619 |
*s->current_picture_ptr->pan_scan= s1->pan_scan; |
| 1620 |
|
| 1621 |
if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
|
| 1622 |
ff_thread_finish_setup(avctx); |
| 1623 |
}else{ //second field |
| 1624 |
int i;
|
| 1625 |
|
| 1626 |
if(!s->current_picture_ptr){
|
| 1627 |
av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
|
| 1628 |
return -1; |
| 1629 |
} |
| 1630 |
|
| 1631 |
for(i=0; i<4; i++){ |
| 1632 |
s->current_picture.data[i] = s->current_picture_ptr->data[i]; |
| 1633 |
if(s->picture_structure == PICT_BOTTOM_FIELD){
|
| 1634 |
s->current_picture.data[i] += s->current_picture_ptr->linesize[i]; |
| 1635 |
} |
| 1636 |
} |
| 1637 |
} |
| 1638 |
|
| 1639 |
if (avctx->hwaccel) {
|
| 1640 |
if (avctx->hwaccel->start_frame(avctx, buf, buf_size) < 0) |
| 1641 |
return -1; |
| 1642 |
} |
| 1643 |
|
| 1644 |
// MPV_frame_start will call this function too,
|
| 1645 |
// but we need to call it on every field
|
| 1646 |
if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
|
| 1647 |
if(ff_xvmc_field_start(s,avctx) < 0) |
| 1648 |
return -1; |
| 1649 |
|
| 1650 |
return 0; |
| 1651 |
} |
| 1652 |
|
| 1653 |
#define DECODE_SLICE_ERROR -1 |
| 1654 |
#define DECODE_SLICE_OK 0 |
| 1655 |
|
| 1656 |
/**
|
| 1657 |
* decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
|
| 1658 |
* @return DECODE_SLICE_ERROR if the slice is damaged<br>
|
| 1659 |
* DECODE_SLICE_OK if this slice is ok<br>
|
| 1660 |
*/
|
| 1661 |
static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y, |
| 1662 |
const uint8_t **buf, int buf_size) |
| 1663 |
{
|
| 1664 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1665 |
AVCodecContext *avctx= s->avctx; |
| 1666 |
const int field_pic= s->picture_structure != PICT_FRAME; |
| 1667 |
const int lowres= s->avctx->lowres; |
| 1668 |
|
| 1669 |
s->resync_mb_x= |
| 1670 |
s->resync_mb_y= -1;
|
| 1671 |
|
| 1672 |
assert(mb_y < s->mb_height); |
| 1673 |
|
| 1674 |
init_get_bits(&s->gb, *buf, buf_size*8);
|
| 1675 |
|
| 1676 |
ff_mpeg1_clean_buffers(s); |
| 1677 |
s->interlaced_dct = 0;
|
| 1678 |
|
| 1679 |
s->qscale = get_qscale(s); |
| 1680 |
|
| 1681 |
if(s->qscale == 0){ |
| 1682 |
av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
|
| 1683 |
return -1; |
| 1684 |
} |
| 1685 |
|
| 1686 |
/* extra slice info */
|
| 1687 |
while (get_bits1(&s->gb) != 0) { |
| 1688 |
skip_bits(&s->gb, 8);
|
| 1689 |
} |
| 1690 |
|
| 1691 |
s->mb_x=0;
|
| 1692 |
|
| 1693 |
if(mb_y==0 && s->codec_tag == AV_RL32("SLIF")){ |
| 1694 |
skip_bits1(&s->gb); |
| 1695 |
}else{
|
| 1696 |
for(;;) {
|
| 1697 |
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); |
| 1698 |
if (code < 0){ |
| 1699 |
av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
|
| 1700 |
return -1; |
| 1701 |
} |
| 1702 |
if (code >= 33) { |
| 1703 |
if (code == 33) { |
| 1704 |
s->mb_x += 33;
|
| 1705 |
} |
| 1706 |
/* otherwise, stuffing, nothing to do */
|
| 1707 |
} else {
|
| 1708 |
s->mb_x += code; |
| 1709 |
break;
|
| 1710 |
} |
| 1711 |
} |
| 1712 |
} |
| 1713 |
|
| 1714 |
if(s->mb_x >= (unsigned)s->mb_width){ |
| 1715 |
av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
|
| 1716 |
return -1; |
| 1717 |
} |
| 1718 |
|
| 1719 |
if (avctx->hwaccel) {
|
| 1720 |
const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */ |
| 1721 |
int start_code = -1; |
| 1722 |
buf_end = ff_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
|
| 1723 |
if (buf_end < *buf + buf_size)
|
| 1724 |
buf_end -= 4;
|
| 1725 |
s->mb_y = mb_y; |
| 1726 |
if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end - buf_start) < 0) |
| 1727 |
return DECODE_SLICE_ERROR;
|
| 1728 |
*buf = buf_end; |
| 1729 |
return DECODE_SLICE_OK;
|
| 1730 |
} |
| 1731 |
|
| 1732 |
s->resync_mb_x= s->mb_x; |
| 1733 |
s->resync_mb_y= s->mb_y= mb_y; |
| 1734 |
s->mb_skip_run= 0;
|
| 1735 |
ff_init_block_index(s); |
| 1736 |
|
| 1737 |
if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) { |
| 1738 |
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
|
| 1739 |
av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
|
| 1740 |
s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1], |
| 1741 |
s->pict_type == FF_I_TYPE ? "I" : (s->pict_type == FF_P_TYPE ? "P" : (s->pict_type == FF_B_TYPE ? "B" : "S")), |
| 1742 |
s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", |
| 1743 |
s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, |
| 1744 |
s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); |
| 1745 |
} |
| 1746 |
} |
| 1747 |
|
| 1748 |
for(;;) {
|
| 1749 |
//If 1, we memcpy blocks in xvmcvideo.
|
| 1750 |
if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration > 1) |
| 1751 |
ff_xvmc_init_block(s);//set s->block
|
| 1752 |
|
| 1753 |
if(mpeg_decode_mb(s, s->block) < 0) |
| 1754 |
return -1; |
| 1755 |
|
| 1756 |
if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs |
| 1757 |
const int wrap = s->b8_stride; |
| 1758 |
int xy = s->mb_x*2 + s->mb_y*2*wrap; |
| 1759 |
int b8_xy= 4*(s->mb_x + s->mb_y*s->mb_stride); |
| 1760 |
int motion_x, motion_y, dir, i;
|
| 1761 |
|
| 1762 |
for(i=0; i<2; i++){ |
| 1763 |
for(dir=0; dir<2; dir++){ |
| 1764 |
if (s->mb_intra || (dir==1 && s->pict_type != FF_B_TYPE)) { |
| 1765 |
motion_x = motion_y = 0;
|
| 1766 |
}else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){ |
| 1767 |
motion_x = s->mv[dir][0][0]; |
| 1768 |
motion_y = s->mv[dir][0][1]; |
| 1769 |
} else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ { |
| 1770 |
motion_x = s->mv[dir][i][0];
|
| 1771 |
motion_y = s->mv[dir][i][1];
|
| 1772 |
} |
| 1773 |
|
| 1774 |
s->current_picture.motion_val[dir][xy ][0] = motion_x;
|
| 1775 |
s->current_picture.motion_val[dir][xy ][1] = motion_y;
|
| 1776 |
s->current_picture.motion_val[dir][xy + 1][0] = motion_x; |
| 1777 |
s->current_picture.motion_val[dir][xy + 1][1] = motion_y; |
| 1778 |
s->current_picture.ref_index [dir][b8_xy ]= |
| 1779 |
s->current_picture.ref_index [dir][b8_xy + 1]= s->field_select[dir][i];
|
| 1780 |
assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1); |
| 1781 |
} |
| 1782 |
xy += wrap; |
| 1783 |
b8_xy +=2;
|
| 1784 |
} |
| 1785 |
} |
| 1786 |
|
| 1787 |
s->dest[0] += 16 >> lowres; |
| 1788 |
s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift; |
| 1789 |
s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift; |
| 1790 |
|
| 1791 |
MPV_decode_mb(s, s->block); |
| 1792 |
|
| 1793 |
if (++s->mb_x >= s->mb_width) {
|
| 1794 |
const int mb_size= 16>>s->avctx->lowres; |
| 1795 |
|
| 1796 |
ff_draw_horiz_band(s, mb_size*(s->mb_y>>field_pic), mb_size); |
| 1797 |
MPV_report_decode_progress(s); |
| 1798 |
|
| 1799 |
s->mb_x = 0;
|
| 1800 |
s->mb_y += 1<<field_pic;
|
| 1801 |
|
| 1802 |
if(s->mb_y >= s->mb_height){
|
| 1803 |
int left= get_bits_left(&s->gb);
|
| 1804 |
int is_d10= s->chroma_format==2 && s->pict_type==FF_I_TYPE && avctx->profile==0 && avctx->level==5 |
| 1805 |
&& s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0 |
| 1806 |
&& s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/; |
| 1807 |
|
| 1808 |
if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) |
| 1809 |
|| (avctx->error_recognition >= FF_ER_AGGRESSIVE && left>8)){
|
| 1810 |
av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23))); |
| 1811 |
return -1; |
| 1812 |
}else
|
| 1813 |
goto eos;
|
| 1814 |
} |
| 1815 |
|
| 1816 |
ff_init_block_index(s); |
| 1817 |
} |
| 1818 |
|
| 1819 |
/* skip mb handling */
|
| 1820 |
if (s->mb_skip_run == -1) { |
| 1821 |
/* read increment again */
|
| 1822 |
s->mb_skip_run = 0;
|
| 1823 |
for(;;) {
|
| 1824 |
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); |
| 1825 |
if (code < 0){ |
| 1826 |
av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
|
| 1827 |
return -1; |
| 1828 |
} |
| 1829 |
if (code >= 33) { |
| 1830 |
if (code == 33) { |
| 1831 |
s->mb_skip_run += 33;
|
| 1832 |
}else if(code == 35){ |
| 1833 |
if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){ |
| 1834 |
av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
|
| 1835 |
return -1; |
| 1836 |
} |
| 1837 |
goto eos; /* end of slice */ |
| 1838 |
} |
| 1839 |
/* otherwise, stuffing, nothing to do */
|
| 1840 |
} else {
|
| 1841 |
s->mb_skip_run += code; |
| 1842 |
break;
|
| 1843 |
} |
| 1844 |
} |
| 1845 |
if(s->mb_skip_run){
|
| 1846 |
int i;
|
| 1847 |
if(s->pict_type == FF_I_TYPE){
|
| 1848 |
av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
|
| 1849 |
return -1; |
| 1850 |
} |
| 1851 |
|
| 1852 |
/* skip mb */
|
| 1853 |
s->mb_intra = 0;
|
| 1854 |
for(i=0;i<12;i++) |
| 1855 |
s->block_last_index[i] = -1;
|
| 1856 |
if(s->picture_structure == PICT_FRAME)
|
| 1857 |
s->mv_type = MV_TYPE_16X16; |
| 1858 |
else
|
| 1859 |
s->mv_type = MV_TYPE_FIELD; |
| 1860 |
if (s->pict_type == FF_P_TYPE) {
|
| 1861 |
/* if P type, zero motion vector is implied */
|
| 1862 |
s->mv_dir = MV_DIR_FORWARD; |
| 1863 |
s->mv[0][0][0] = s->mv[0][0][1] = 0; |
| 1864 |
s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; |
| 1865 |
s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; |
| 1866 |
s->field_select[0][0]= (s->picture_structure - 1) & 1; |
| 1867 |
} else {
|
| 1868 |
/* if B type, reuse previous vectors and directions */
|
| 1869 |
s->mv[0][0][0] = s->last_mv[0][0][0]; |
| 1870 |
s->mv[0][0][1] = s->last_mv[0][0][1]; |
| 1871 |
s->mv[1][0][0] = s->last_mv[1][0][0]; |
| 1872 |
s->mv[1][0][1] = s->last_mv[1][0][1]; |
| 1873 |
} |
| 1874 |
} |
| 1875 |
} |
| 1876 |
} |
| 1877 |
eos: // end of slice |
| 1878 |
*buf += (get_bits_count(&s->gb)-1)/8; |
| 1879 |
//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
|
| 1880 |
return 0; |
| 1881 |
} |
| 1882 |
|
| 1883 |
static int slice_decode_thread(AVCodecContext *c, void *arg){ |
| 1884 |
MpegEncContext *s= *(void**)arg;
|
| 1885 |
const uint8_t *buf= s->gb.buffer;
|
| 1886 |
int mb_y= s->start_mb_y;
|
| 1887 |
const int field_pic= s->picture_structure != PICT_FRAME; |
| 1888 |
|
| 1889 |
s->error_count= (3*(s->end_mb_y - s->start_mb_y)*s->mb_width) >> field_pic;
|
| 1890 |
|
| 1891 |
for(;;){
|
| 1892 |
uint32_t start_code; |
| 1893 |
int ret;
|
| 1894 |
|
| 1895 |
ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf); |
| 1896 |
emms_c(); |
| 1897 |
//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
|
| 1898 |
//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
|
| 1899 |
if(ret < 0){ |
| 1900 |
if(s->resync_mb_x>=0 && s->resync_mb_y>=0) |
| 1901 |
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); |
| 1902 |
}else{
|
| 1903 |
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
|
| 1904 |
} |
| 1905 |
|
| 1906 |
if(s->mb_y == s->end_mb_y)
|
| 1907 |
return 0; |
| 1908 |
|
| 1909 |
start_code= -1;
|
| 1910 |
buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code); |
| 1911 |
mb_y= start_code - SLICE_MIN_START_CODE; |
| 1912 |
if(mb_y < 0 || mb_y >= s->end_mb_y) |
| 1913 |
return -1; |
| 1914 |
} |
| 1915 |
|
| 1916 |
return 0; //not reached |
| 1917 |
} |
| 1918 |
|
| 1919 |
/**
|
| 1920 |
* Handle slice ends.
|
| 1921 |
* @return 1 if it seems to be the last slice
|
| 1922 |
*/
|
| 1923 |
static int slice_end(AVCodecContext *avctx, AVFrame *pict) |
| 1924 |
{
|
| 1925 |
Mpeg1Context *s1 = avctx->priv_data; |
| 1926 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1927 |
|
| 1928 |
if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
|
| 1929 |
return 0; |
| 1930 |
|
| 1931 |
if (s->avctx->hwaccel) {
|
| 1932 |
if (s->avctx->hwaccel->end_frame(s->avctx) < 0) |
| 1933 |
av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
|
| 1934 |
} |
| 1935 |
|
| 1936 |
if(CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
|
| 1937 |
ff_xvmc_field_end(s); |
| 1938 |
|
| 1939 |
/* end of slice reached */
|
| 1940 |
if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) { |
| 1941 |
/* end of image */
|
| 1942 |
|
| 1943 |
s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2; |
| 1944 |
|
| 1945 |
ff_er_frame_end(s); |
| 1946 |
|
| 1947 |
MPV_frame_end(s); |
| 1948 |
|
| 1949 |
if (s->pict_type == FF_B_TYPE || s->low_delay) {
|
| 1950 |
*pict= *(AVFrame*)s->current_picture_ptr; |
| 1951 |
ff_print_debug_info(s, pict); |
| 1952 |
} else {
|
| 1953 |
if (avctx->active_thread_type&FF_THREAD_FRAME)
|
| 1954 |
s->picture_number++; |
| 1955 |
/* latency of 1 frame for I- and P-frames */
|
| 1956 |
/* XXX: use another variable than picture_number */
|
| 1957 |
if (s->last_picture_ptr != NULL) { |
| 1958 |
*pict= *(AVFrame*)s->last_picture_ptr; |
| 1959 |
ff_print_debug_info(s, pict); |
| 1960 |
} |
| 1961 |
} |
| 1962 |
|
| 1963 |
return 1; |
| 1964 |
} else {
|
| 1965 |
return 0; |
| 1966 |
} |
| 1967 |
} |
| 1968 |
|
| 1969 |
static int mpeg1_decode_sequence(AVCodecContext *avctx, |
| 1970 |
const uint8_t *buf, int buf_size) |
| 1971 |
{
|
| 1972 |
Mpeg1Context *s1 = avctx->priv_data; |
| 1973 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 1974 |
int width,height;
|
| 1975 |
int i, v, j;
|
| 1976 |
|
| 1977 |
init_get_bits(&s->gb, buf, buf_size*8);
|
| 1978 |
|
| 1979 |
width = get_bits(&s->gb, 12);
|
| 1980 |
height = get_bits(&s->gb, 12);
|
| 1981 |
if (width <= 0 || height <= 0) |
| 1982 |
return -1; |
| 1983 |
s->aspect_ratio_info= get_bits(&s->gb, 4);
|
| 1984 |
if (s->aspect_ratio_info == 0) { |
| 1985 |
av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
|
| 1986 |
if (avctx->error_recognition >= FF_ER_COMPLIANT)
|
| 1987 |
return -1; |
| 1988 |
} |
| 1989 |
s->frame_rate_index = get_bits(&s->gb, 4);
|
| 1990 |
if (s->frame_rate_index == 0 || s->frame_rate_index > 13) |
| 1991 |
return -1; |
| 1992 |
s->bit_rate = get_bits(&s->gb, 18) * 400; |
| 1993 |
if (get_bits1(&s->gb) == 0) /* marker */ |
| 1994 |
return -1; |
| 1995 |
s->width = width; |
| 1996 |
s->height = height; |
| 1997 |
|
| 1998 |
s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16; |
| 1999 |
skip_bits(&s->gb, 1);
|
| 2000 |
|
| 2001 |
/* get matrix */
|
| 2002 |
if (get_bits1(&s->gb)) {
|
| 2003 |
load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
|
| 2004 |
} else {
|
| 2005 |
for(i=0;i<64;i++) { |
| 2006 |
j = s->dsp.idct_permutation[i]; |
| 2007 |
v = ff_mpeg1_default_intra_matrix[i]; |
| 2008 |
s->intra_matrix[j] = v; |
| 2009 |
s->chroma_intra_matrix[j] = v; |
| 2010 |
} |
| 2011 |
} |
| 2012 |
if (get_bits1(&s->gb)) {
|
| 2013 |
load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
|
| 2014 |
} else {
|
| 2015 |
for(i=0;i<64;i++) { |
| 2016 |
int j= s->dsp.idct_permutation[i];
|
| 2017 |
v = ff_mpeg1_default_non_intra_matrix[i]; |
| 2018 |
s->inter_matrix[j] = v; |
| 2019 |
s->chroma_inter_matrix[j] = v; |
| 2020 |
} |
| 2021 |
} |
| 2022 |
|
| 2023 |
if(show_bits(&s->gb, 23) != 0){ |
| 2024 |
av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
|
| 2025 |
return -1; |
| 2026 |
} |
| 2027 |
|
| 2028 |
/* we set MPEG-2 parameters so that it emulates MPEG-1 */
|
| 2029 |
s->progressive_sequence = 1;
|
| 2030 |
s->progressive_frame = 1;
|
| 2031 |
s->picture_structure = PICT_FRAME; |
| 2032 |
s->frame_pred_frame_dct = 1;
|
| 2033 |
s->chroma_format = 1;
|
| 2034 |
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO; |
| 2035 |
avctx->sub_id = 1; /* indicates MPEG-1 */ |
| 2036 |
s->out_format = FMT_MPEG1; |
| 2037 |
s->swap_uv = 0;//AFAIK VCR2 does not have SEQ_HEADER |
| 2038 |
if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; |
| 2039 |
|
| 2040 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 2041 |
av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
|
| 2042 |
s->avctx->rc_buffer_size, s->bit_rate); |
| 2043 |
|
| 2044 |
return 0; |
| 2045 |
} |
| 2046 |
|
| 2047 |
static int vcr2_init_sequence(AVCodecContext *avctx) |
| 2048 |
{
|
| 2049 |
Mpeg1Context *s1 = avctx->priv_data; |
| 2050 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 2051 |
int i, v;
|
| 2052 |
|
| 2053 |
/* start new MPEG-1 context decoding */
|
| 2054 |
s->out_format = FMT_MPEG1; |
| 2055 |
if (s1->mpeg_enc_ctx_allocated) {
|
| 2056 |
MPV_common_end(s); |
| 2057 |
} |
| 2058 |
s->width = avctx->coded_width; |
| 2059 |
s->height = avctx->coded_height; |
| 2060 |
avctx->has_b_frames= 0; //true? |
| 2061 |
s->low_delay= 1;
|
| 2062 |
|
| 2063 |
avctx->pix_fmt = mpeg_get_pixelformat(avctx); |
| 2064 |
avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt); |
| 2065 |
|
| 2066 |
if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT || avctx->hwaccel ||
|
| 2067 |
s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ) |
| 2068 |
if( avctx->idct_algo == FF_IDCT_AUTO )
|
| 2069 |
avctx->idct_algo = FF_IDCT_SIMPLE; |
| 2070 |
|
| 2071 |
if (MPV_common_init(s) < 0) |
| 2072 |
return -1; |
| 2073 |
exchange_uv(s);//common init reset pblocks, so we swap them here
|
| 2074 |
s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB |
| 2075 |
s1->mpeg_enc_ctx_allocated = 1;
|
| 2076 |
|
| 2077 |
for(i=0;i<64;i++) { |
| 2078 |
int j= s->dsp.idct_permutation[i];
|
| 2079 |
v = ff_mpeg1_default_intra_matrix[i]; |
| 2080 |
s->intra_matrix[j] = v; |
| 2081 |
s->chroma_intra_matrix[j] = v; |
| 2082 |
|
| 2083 |
v = ff_mpeg1_default_non_intra_matrix[i]; |
| 2084 |
s->inter_matrix[j] = v; |
| 2085 |
s->chroma_inter_matrix[j] = v; |
| 2086 |
} |
| 2087 |
|
| 2088 |
s->progressive_sequence = 1;
|
| 2089 |
s->progressive_frame = 1;
|
| 2090 |
s->picture_structure = PICT_FRAME; |
| 2091 |
s->frame_pred_frame_dct = 1;
|
| 2092 |
s->chroma_format = 1;
|
| 2093 |
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; |
| 2094 |
avctx->sub_id = 2; /* indicates MPEG-2 */ |
| 2095 |
s1->save_width = s->width; |
| 2096 |
s1->save_height = s->height; |
| 2097 |
s1->save_progressive_seq = s->progressive_sequence; |
| 2098 |
return 0; |
| 2099 |
} |
| 2100 |
|
| 2101 |
|
| 2102 |
static void mpeg_decode_user_data(AVCodecContext *avctx, |
| 2103 |
const uint8_t *p, int buf_size) |
| 2104 |
{
|
| 2105 |
const uint8_t *buf_end = p+buf_size;
|
| 2106 |
|
| 2107 |
/* we parse the DTG active format information */
|
| 2108 |
if (buf_end - p >= 5 && |
| 2109 |
p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { |
| 2110 |
int flags = p[4]; |
| 2111 |
p += 5;
|
| 2112 |
if (flags & 0x80) { |
| 2113 |
/* skip event id */
|
| 2114 |
p += 2;
|
| 2115 |
} |
| 2116 |
if (flags & 0x40) { |
| 2117 |
if (buf_end - p < 1) |
| 2118 |
return;
|
| 2119 |
avctx->dtg_active_format = p[0] & 0x0f; |
| 2120 |
} |
| 2121 |
} |
| 2122 |
} |
| 2123 |
|
| 2124 |
static void mpeg_decode_gop(AVCodecContext *avctx, |
| 2125 |
const uint8_t *buf, int buf_size){ |
| 2126 |
Mpeg1Context *s1 = avctx->priv_data; |
| 2127 |
MpegEncContext *s = &s1->mpeg_enc_ctx; |
| 2128 |
|
| 2129 |
int drop_frame_flag;
|
| 2130 |
int time_code_hours, time_code_minutes;
|
| 2131 |
int time_code_seconds, time_code_pictures;
|
| 2132 |
int broken_link;
|
| 2133 |
|
| 2134 |
init_get_bits(&s->gb, buf, buf_size*8);
|
| 2135 |
|
| 2136 |
drop_frame_flag = get_bits1(&s->gb); |
| 2137 |
|
| 2138 |
time_code_hours=get_bits(&s->gb,5);
|
| 2139 |
time_code_minutes = get_bits(&s->gb,6);
|
| 2140 |
skip_bits1(&s->gb);//marker bit
|
| 2141 |
time_code_seconds = get_bits(&s->gb,6);
|
| 2142 |
time_code_pictures = get_bits(&s->gb,6);
|
| 2143 |
|
| 2144 |
s->closed_gop = get_bits1(&s->gb); |
| 2145 |
/*broken_link indicate that after editing the
|
| 2146 |
reference frames of the first B-Frames after GOP I-Frame
|
| 2147 |
are missing (open gop)*/
|
| 2148 |
broken_link = get_bits1(&s->gb); |
| 2149 |
|
| 2150 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 2151 |
av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
|
| 2152 |
time_code_hours, time_code_minutes, time_code_seconds, |
| 2153 |
time_code_pictures, s->closed_gop, broken_link); |
| 2154 |
} |
| 2155 |
/**
|
| 2156 |
* Find the end of the current frame in the bitstream.
|
| 2157 |
* @return the position of the first byte of the next frame, or -1
|
| 2158 |
*/
|
| 2159 |
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s) |
| 2160 |
{
|
| 2161 |
int i;
|
| 2162 |
uint32_t state= pc->state; |
| 2163 |
|
| 2164 |
/* EOF considered as end of frame */
|
| 2165 |
if (buf_size == 0) |
| 2166 |
return 0; |
| 2167 |
|
| 2168 |
/*
|
| 2169 |
0 frame start -> 1/4
|
| 2170 |
1 first_SEQEXT -> 0/2
|
| 2171 |
2 first field start -> 3/0
|
| 2172 |
3 second_SEQEXT -> 2/0
|
| 2173 |
4 searching end
|
| 2174 |
*/
|
| 2175 |
|
| 2176 |
for(i=0; i<buf_size; i++){ |
| 2177 |
assert(pc->frame_start_found>=0 && pc->frame_start_found<=4); |
| 2178 |
if(pc->frame_start_found&1){ |
| 2179 |
if(state == EXT_START_CODE && (buf[i]&0xF0) != 0x80) |
| 2180 |
pc->frame_start_found--; |
| 2181 |
else if(state == EXT_START_CODE+2){ |
| 2182 |
if((buf[i]&3) == 3) pc->frame_start_found= 0; |
| 2183 |
else pc->frame_start_found= (pc->frame_start_found+1)&3; |
| 2184 |
} |
| 2185 |
state++; |
| 2186 |
}else{
|
| 2187 |
i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
|
| 2188 |
if(pc->frame_start_found==0 && state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){ |
| 2189 |
i++; |
| 2190 |
pc->frame_start_found=4;
|
| 2191 |
} |
| 2192 |
if(state == SEQ_END_CODE){
|
| 2193 |
pc->state=-1;
|
| 2194 |
return i+1; |
| 2195 |
} |
| 2196 |
if(pc->frame_start_found==2 && state == SEQ_START_CODE) |
| 2197 |
pc->frame_start_found= 0;
|
| 2198 |
if(pc->frame_start_found<4 && state == EXT_START_CODE) |
| 2199 |
pc->frame_start_found++; |
| 2200 |
if(pc->frame_start_found == 4 && (state&0xFFFFFF00) == 0x100){ |
| 2201 |
if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
|
| 2202 |
pc->frame_start_found=0;
|
| 2203 |
pc->state=-1;
|
| 2204 |
return i-3; |
| 2205 |
} |
| 2206 |
} |
| 2207 |
if(pc->frame_start_found == 0 && s && state == PICTURE_START_CODE){ |
| 2208 |
ff_fetch_timestamp(s, i-3, 1); |
| 2209 |
} |
| 2210 |
} |
| 2211 |
} |
| 2212 |
pc->state= state; |
| 2213 |
return END_NOT_FOUND;
|
| 2214 |
} |
| 2215 |
|
| 2216 |
static int decode_chunks(AVCodecContext *avctx, |
| 2217 |
AVFrame *picture, int *data_size,
|
| 2218 |
const uint8_t *buf, int buf_size); |
| 2219 |
|
| 2220 |
/* handle buffering and image synchronisation */
|
| 2221 |
static int mpeg_decode_frame(AVCodecContext *avctx, |
| 2222 |
void *data, int *data_size, |
| 2223 |
AVPacket *avpkt) |
| 2224 |
{
|
| 2225 |
const uint8_t *buf = avpkt->data;
|
| 2226 |
int buf_size = avpkt->size;
|
| 2227 |
Mpeg1Context *s = avctx->priv_data; |
| 2228 |
AVFrame *picture = data; |
| 2229 |
MpegEncContext *s2 = &s->mpeg_enc_ctx; |
| 2230 |
av_dlog(avctx, "fill_buffer\n");
|
| 2231 |
|
| 2232 |
if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) { |
| 2233 |
/* special case for last picture */
|
| 2234 |
if (s2->low_delay==0 && s2->next_picture_ptr) { |
| 2235 |
*picture= *(AVFrame*)s2->next_picture_ptr; |
| 2236 |
s2->next_picture_ptr= NULL;
|
| 2237 |
|
| 2238 |
*data_size = sizeof(AVFrame);
|
| 2239 |
} |
| 2240 |
return buf_size;
|
| 2241 |
} |
| 2242 |
|
| 2243 |
if(s2->flags&CODEC_FLAG_TRUNCATED){
|
| 2244 |
int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size, NULL); |
| 2245 |
|
| 2246 |
if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 ) |
| 2247 |
return buf_size;
|
| 2248 |
} |
| 2249 |
|
| 2250 |
#if 0
|
| 2251 |
if (s->repeat_field % 2 == 1) {
|
| 2252 |
s->repeat_field++;
|
| 2253 |
//fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
|
| 2254 |
// s2->picture_number, s->repeat_field);
|
| 2255 |
if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
|
| 2256 |
*data_size = sizeof(AVPicture);
|
| 2257 |
goto the_end;
|
| 2258 |
}
|
| 2259 |
}
|
| 2260 |
#endif
|
| 2261 |
|
| 2262 |
if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == AV_RL32("VCR2")) |
| 2263 |
vcr2_init_sequence(avctx); |
| 2264 |
|
| 2265 |
s->slice_count= 0;
|
| 2266 |
|
| 2267 |
if(avctx->extradata && !avctx->frame_number)
|
| 2268 |
decode_chunks(avctx, picture, data_size, avctx->extradata, avctx->extradata_size); |
| 2269 |
|
| 2270 |
return decode_chunks(avctx, picture, data_size, buf, buf_size);
|
| 2271 |
} |
| 2272 |
|
| 2273 |
static int decode_chunks(AVCodecContext *avctx, |
| 2274 |
AVFrame *picture, int *data_size,
|
| 2275 |
const uint8_t *buf, int buf_size) |
| 2276 |
{
|
| 2277 |
Mpeg1Context *s = avctx->priv_data; |
| 2278 |
MpegEncContext *s2 = &s->mpeg_enc_ctx; |
| 2279 |
const uint8_t *buf_ptr = buf;
|
| 2280 |
const uint8_t *buf_end = buf + buf_size;
|
| 2281 |
int ret, input_size;
|
| 2282 |
int last_code= 0; |
| 2283 |
|
| 2284 |
for(;;) {
|
| 2285 |
/* find next start code */
|
| 2286 |
uint32_t start_code = -1;
|
| 2287 |
buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code); |
| 2288 |
if (start_code > 0x1ff){ |
| 2289 |
if(s2->pict_type != FF_B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
|
| 2290 |
if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
|
| 2291 |
int i;
|
| 2292 |
|
| 2293 |
avctx->execute(avctx, slice_decode_thread, &s2->thread_context[0], NULL, s->slice_count, sizeof(void*)); |
| 2294 |
for(i=0; i<s->slice_count; i++) |
| 2295 |
s2->error_count += s2->thread_context[i]->error_count; |
| 2296 |
} |
| 2297 |
|
| 2298 |
if (CONFIG_MPEG_VDPAU_DECODER && avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
|
| 2299 |
ff_vdpau_mpeg_picture_complete(s2, buf, buf_size, s->slice_count); |
| 2300 |
|
| 2301 |
if (slice_end(avctx, picture)) {
|
| 2302 |
if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice |
| 2303 |
*data_size = sizeof(AVPicture);
|
| 2304 |
} |
| 2305 |
} |
| 2306 |
s2->pict_type= 0;
|
| 2307 |
return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); |
| 2308 |
} |
| 2309 |
|
| 2310 |
input_size = buf_end - buf_ptr; |
| 2311 |
|
| 2312 |
if(avctx->debug & FF_DEBUG_STARTCODE){
|
| 2313 |
av_log(avctx, AV_LOG_DEBUG, "%3X at %td left %d\n", start_code, buf_ptr-buf, input_size);
|
| 2314 |
} |
| 2315 |
|
| 2316 |
/* prepare data for next start code */
|
| 2317 |
switch(start_code) {
|
| 2318 |
case SEQ_START_CODE:
|
| 2319 |
if(last_code == 0){ |
| 2320 |
mpeg1_decode_sequence(avctx, buf_ptr, |
| 2321 |
input_size); |
| 2322 |
s->sync=1;
|
| 2323 |
}else{
|
| 2324 |
av_log(avctx, AV_LOG_ERROR, "ignoring SEQ_START_CODE after %X\n", last_code);
|
| 2325 |
} |
| 2326 |
break;
|
| 2327 |
|
| 2328 |
case PICTURE_START_CODE:
|
| 2329 |
if(last_code == 0 || last_code == SLICE_MIN_START_CODE){ |
| 2330 |
if(mpeg_decode_postinit(avctx) < 0){ |
| 2331 |
av_log(avctx, AV_LOG_ERROR, "mpeg_decode_postinit() failure\n");
|
| 2332 |
return -1; |
| 2333 |
} |
| 2334 |
|
| 2335 |
/* we have a complete image: we try to decompress it */
|
| 2336 |
if(mpeg1_decode_picture(avctx,
|
| 2337 |
buf_ptr, input_size) < 0)
|
| 2338 |
s2->pict_type=0;
|
| 2339 |
s2->first_slice = 1;
|
| 2340 |
last_code= PICTURE_START_CODE; |
| 2341 |
}else{
|
| 2342 |
av_log(avctx, AV_LOG_ERROR, "ignoring pic after %X\n", last_code);
|
| 2343 |
} |
| 2344 |
break;
|
| 2345 |
case EXT_START_CODE:
|
| 2346 |
init_get_bits(&s2->gb, buf_ptr, input_size*8);
|
| 2347 |
|
| 2348 |
switch(get_bits(&s2->gb, 4)) { |
| 2349 |
case 0x1: |
| 2350 |
if(last_code == 0){ |
| 2351 |
mpeg_decode_sequence_extension(s); |
| 2352 |
}else{
|
| 2353 |
av_log(avctx, AV_LOG_ERROR, "ignoring seq ext after %X\n", last_code);
|
| 2354 |
} |
| 2355 |
break;
|
| 2356 |
case 0x2: |
| 2357 |
mpeg_decode_sequence_display_extension(s); |
| 2358 |
break;
|
| 2359 |
case 0x3: |
| 2360 |
mpeg_decode_quant_matrix_extension(s2); |
| 2361 |
break;
|
| 2362 |
case 0x7: |
| 2363 |
mpeg_decode_picture_display_extension(s); |
| 2364 |
break;
|
| 2365 |
case 0x8: |
| 2366 |
if(last_code == PICTURE_START_CODE){
|
| 2367 |
mpeg_decode_picture_coding_extension(s); |
| 2368 |
}else{
|
| 2369 |
av_log(avctx, AV_LOG_ERROR, "ignoring pic cod ext after %X\n", last_code);
|
| 2370 |
} |
| 2371 |
break;
|
| 2372 |
} |
| 2373 |
break;
|
| 2374 |
case USER_START_CODE:
|
| 2375 |
mpeg_decode_user_data(avctx, |
| 2376 |
buf_ptr, input_size); |
| 2377 |
break;
|
| 2378 |
case GOP_START_CODE:
|
| 2379 |
if(last_code == 0){ |
| 2380 |
s2->first_field=0;
|
| 2381 |
mpeg_decode_gop(avctx, |
| 2382 |
buf_ptr, input_size); |
| 2383 |
s->sync=1;
|
| 2384 |
}else{
|
| 2385 |
av_log(avctx, AV_LOG_ERROR, "ignoring GOP_START_CODE after %X\n", last_code);
|
| 2386 |
} |
| 2387 |
break;
|
| 2388 |
default:
|
| 2389 |
if (start_code >= SLICE_MIN_START_CODE &&
|
| 2390 |
start_code <= SLICE_MAX_START_CODE && last_code!=0) {
|
| 2391 |
const int field_pic= s2->picture_structure != PICT_FRAME; |
| 2392 |
int mb_y= (start_code - SLICE_MIN_START_CODE) << field_pic;
|
| 2393 |
last_code= SLICE_MIN_START_CODE; |
| 2394 |
|
| 2395 |
if(s2->picture_structure == PICT_BOTTOM_FIELD)
|
| 2396 |
mb_y++; |
| 2397 |
|
| 2398 |
if (mb_y >= s2->mb_height){
|
| 2399 |
av_log(s2->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
|
| 2400 |
return -1; |
| 2401 |
} |
| 2402 |
|
| 2403 |
if(s2->last_picture_ptr==NULL){ |
| 2404 |
/* Skip B-frames if we do not have reference frames and gop is not closed */
|
| 2405 |
if(s2->pict_type==FF_B_TYPE){
|
| 2406 |
if(!s2->closed_gop)
|
| 2407 |
break;
|
| 2408 |
} |
| 2409 |
} |
| 2410 |
if(s2->pict_type==FF_I_TYPE)
|
| 2411 |
s->sync=1;
|
| 2412 |
if(s2->next_picture_ptr==NULL){ |
| 2413 |
/* Skip P-frames if we do not have a reference frame or we have an invalid header. */
|
| 2414 |
if(s2->pict_type==FF_P_TYPE && !s->sync) break; |
| 2415 |
} |
| 2416 |
/* Skip B-frames if we are in a hurry. */
|
| 2417 |
if(avctx->hurry_up && s2->pict_type==FF_B_TYPE) break; |
| 2418 |
if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==FF_B_TYPE)
|
| 2419 |
||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=FF_I_TYPE) |
| 2420 |
|| avctx->skip_frame >= AVDISCARD_ALL) |
| 2421 |
break;
|
| 2422 |
/* Skip everything if we are in a hurry>=5. */
|
| 2423 |
if(avctx->hurry_up>=5) break; |
| 2424 |
|
| 2425 |
if (!s->mpeg_enc_ctx_allocated) break; |
| 2426 |
|
| 2427 |
if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
|
| 2428 |
if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
|
| 2429 |
break;
|
| 2430 |
} |
| 2431 |
|
| 2432 |
if(!s2->pict_type){
|
| 2433 |
av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
|
| 2434 |
break;
|
| 2435 |
} |
| 2436 |
|
| 2437 |
if(s2->first_slice){
|
| 2438 |
s2->first_slice=0;
|
| 2439 |
if(mpeg_field_start(s2, buf, buf_size) < 0) |
| 2440 |
return -1; |
| 2441 |
} |
| 2442 |
if(!s2->current_picture_ptr){
|
| 2443 |
av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
|
| 2444 |
return -1; |
| 2445 |
} |
| 2446 |
|
| 2447 |
if (avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU) {
|
| 2448 |
s->slice_count++; |
| 2449 |
break;
|
| 2450 |
} |
| 2451 |
|
| 2452 |
if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_SLICE){
|
| 2453 |
int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count; |
| 2454 |
if(threshold <= mb_y){
|
| 2455 |
MpegEncContext *thread_context= s2->thread_context[s->slice_count]; |
| 2456 |
|
| 2457 |
thread_context->start_mb_y= mb_y; |
| 2458 |
thread_context->end_mb_y = s2->mb_height; |
| 2459 |
if(s->slice_count){
|
| 2460 |
s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
|
| 2461 |
ff_update_duplicate_context(thread_context, s2); |
| 2462 |
} |
| 2463 |
init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
|
| 2464 |
s->slice_count++; |
| 2465 |
} |
| 2466 |
buf_ptr += 2; //FIXME add minimum number of bytes per slice |
| 2467 |
}else{
|
| 2468 |
ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size); |
| 2469 |
emms_c(); |
| 2470 |
|
| 2471 |
if(ret < 0){ |
| 2472 |
if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0) |
| 2473 |
ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); |
| 2474 |
}else{
|
| 2475 |
ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
|
| 2476 |
} |
| 2477 |
} |
| 2478 |
} |
| 2479 |
break;
|
| 2480 |
} |
| 2481 |
} |
| 2482 |
} |
| 2483 |
|
| 2484 |
static void flush(AVCodecContext *avctx){ |
| 2485 |
Mpeg1Context *s = avctx->priv_data; |
| 2486 |
|
| 2487 |
s->sync=0;
|
| 2488 |
|
| 2489 |
ff_mpeg_flush(avctx); |
| 2490 |
} |
| 2491 |
|
| 2492 |
static int mpeg_decode_end(AVCodecContext *avctx) |
| 2493 |
{
|
| 2494 |
Mpeg1Context *s = avctx->priv_data; |
| 2495 |
|
| 2496 |
if (s->mpeg_enc_ctx_allocated)
|
| 2497 |
MPV_common_end(&s->mpeg_enc_ctx); |
| 2498 |
return 0; |
| 2499 |
} |
| 2500 |
|
| 2501 |
static const AVProfile mpeg2_video_profiles[] = { |
| 2502 |
{ FF_PROFILE_MPEG2_422, "4:2:2" },
|
| 2503 |
{ FF_PROFILE_MPEG2_HIGH, "High" },
|
| 2504 |
{ FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
|
| 2505 |
{ FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
|
| 2506 |
{ FF_PROFILE_MPEG2_MAIN, "Main" },
|
| 2507 |
{ FF_PROFILE_MPEG2_SIMPLE, "Simple" },
|
| 2508 |
{ FF_PROFILE_RESERVED, "Reserved" },
|
| 2509 |
{ FF_PROFILE_RESERVED, "Reserved" },
|
| 2510 |
}; |
| 2511 |
|
| 2512 |
|
| 2513 |
AVCodec ff_mpeg1video_decoder = {
|
| 2514 |
"mpeg1video",
|
| 2515 |
AVMEDIA_TYPE_VIDEO, |
| 2516 |
CODEC_ID_MPEG1VIDEO, |
| 2517 |
sizeof(Mpeg1Context),
|
| 2518 |
mpeg_decode_init, |
| 2519 |
NULL,
|
| 2520 |
mpeg_decode_end, |
| 2521 |
mpeg_decode_frame, |
| 2522 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, |
| 2523 |
.flush= flush, |
| 2524 |
.max_lowres= 3,
|
| 2525 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
|
| 2526 |
.update_thread_context= ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context) |
| 2527 |
}; |
| 2528 |
|
| 2529 |
AVCodec ff_mpeg2video_decoder = {
|
| 2530 |
"mpeg2video",
|
| 2531 |
AVMEDIA_TYPE_VIDEO, |
| 2532 |
CODEC_ID_MPEG2VIDEO, |
| 2533 |
sizeof(Mpeg1Context),
|
| 2534 |
mpeg_decode_init, |
| 2535 |
NULL,
|
| 2536 |
mpeg_decode_end, |
| 2537 |
mpeg_decode_frame, |
| 2538 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, |
| 2539 |
.flush= flush, |
| 2540 |
.max_lowres= 3,
|
| 2541 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
|
| 2542 |
.profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles), |
| 2543 |
}; |
| 2544 |
|
| 2545 |
//legacy decoder
|
| 2546 |
AVCodec ff_mpegvideo_decoder = {
|
| 2547 |
"mpegvideo",
|
| 2548 |
AVMEDIA_TYPE_VIDEO, |
| 2549 |
CODEC_ID_MPEG2VIDEO, |
| 2550 |
sizeof(Mpeg1Context),
|
| 2551 |
mpeg_decode_init, |
| 2552 |
NULL,
|
| 2553 |
mpeg_decode_end, |
| 2554 |
mpeg_decode_frame, |
| 2555 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, |
| 2556 |
.flush= flush, |
| 2557 |
.max_lowres= 3,
|
| 2558 |
.long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
|
| 2559 |
}; |
| 2560 |
|
| 2561 |
#if CONFIG_MPEG_XVMC_DECODER
|
| 2562 |
static av_cold int mpeg_mc_decode_init(AVCodecContext *avctx){ |
| 2563 |
if( avctx->active_thread_type & FF_THREAD_SLICE )
|
| 2564 |
return -1; |
| 2565 |
if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
|
| 2566 |
return -1; |
| 2567 |
if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
|
| 2568 |
av_dlog(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
|
| 2569 |
} |
| 2570 |
mpeg_decode_init(avctx); |
| 2571 |
|
| 2572 |
avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT; |
| 2573 |
avctx->xvmc_acceleration = 2;//2 - the blocks are packed! |
| 2574 |
|
| 2575 |
return 0; |
| 2576 |
} |
| 2577 |
|
| 2578 |
AVCodec ff_mpeg_xvmc_decoder = {
|
| 2579 |
"mpegvideo_xvmc",
|
| 2580 |
AVMEDIA_TYPE_VIDEO, |
| 2581 |
CODEC_ID_MPEG2VIDEO_XVMC, |
| 2582 |
sizeof(Mpeg1Context),
|
| 2583 |
mpeg_mc_decode_init, |
| 2584 |
NULL,
|
| 2585 |
mpeg_decode_end, |
| 2586 |
mpeg_decode_frame, |
| 2587 |
CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, |
| 2588 |
.flush= flush, |
| 2589 |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
|
| 2590 |
}; |
| 2591 |
|
| 2592 |
#endif
|
| 2593 |
|
| 2594 |
#if CONFIG_MPEG_VDPAU_DECODER
|
| 2595 |
AVCodec ff_mpeg_vdpau_decoder = {
|
| 2596 |
"mpegvideo_vdpau",
|
| 2597 |
AVMEDIA_TYPE_VIDEO, |
| 2598 |
CODEC_ID_MPEG2VIDEO, |
| 2599 |
sizeof(Mpeg1Context),
|
| 2600 |
mpeg_decode_init, |
| 2601 |
NULL,
|
| 2602 |
mpeg_decode_end, |
| 2603 |
mpeg_decode_frame, |
| 2604 |
CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, |
| 2605 |
.flush= flush, |
| 2606 |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
|
| 2607 |
}; |
| 2608 |
#endif
|
| 2609 |
|
| 2610 |
#if CONFIG_MPEG1_VDPAU_DECODER
|
| 2611 |
AVCodec ff_mpeg1_vdpau_decoder = {
|
| 2612 |
"mpeg1video_vdpau",
|
| 2613 |
AVMEDIA_TYPE_VIDEO, |
| 2614 |
CODEC_ID_MPEG1VIDEO, |
| 2615 |
sizeof(Mpeg1Context),
|
| 2616 |
mpeg_decode_init, |
| 2617 |
NULL,
|
| 2618 |
mpeg_decode_end, |
| 2619 |
mpeg_decode_frame, |
| 2620 |
CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_HWACCEL_VDPAU | CODEC_CAP_DELAY, |
| 2621 |
.flush= flush, |
| 2622 |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),
|
| 2623 |
}; |
| 2624 |
#endif
|
| 2625 |
|