3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
32 #include "mpegvideo.h"
35 #include "mpeg12data.h"
36 #include "mpeg12decdata.h"
37 #include "bytestream.h"
38 #include "vdpau_internal.h"
39 #include "xvmc_internal.h"
46 #define MBINCR_VLC_BITS 9
47 #define MB_PAT_VLC_BITS 9
48 #define MB_PTYPE_VLC_BITS 6
49 #define MB_BTYPE_VLC_BITS 6
51 static inline int mpeg1_decode_block_intra(MpegEncContext
*s
,
54 static inline int mpeg1_decode_block_inter(MpegEncContext
*s
,
57 static inline int mpeg1_fast_decode_block_inter(MpegEncContext
*s
, DCTELEM
*block
, int n
);
58 static inline int mpeg2_decode_block_non_intra(MpegEncContext
*s
,
61 static inline int mpeg2_decode_block_intra(MpegEncContext
*s
,
64 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext
*s
, DCTELEM
*block
, int n
);
65 static inline int mpeg2_fast_decode_block_intra(MpegEncContext
*s
, DCTELEM
*block
, int n
);
66 static int mpeg_decode_motion(MpegEncContext
*s
, int fcode
, int pred
);
67 static void exchange_uv(MpegEncContext
*s
);
69 static const enum PixelFormat pixfmt_xvmc_mpg2_420
[] = {
70 PIX_FMT_XVMC_MPEG2_IDCT
,
71 PIX_FMT_XVMC_MPEG2_MC
,
74 uint8_t ff_mpeg12_static_rl_table_store
[2][2][2*MAX_RUN
+ MAX_LEVEL
+ 3];
77 #define INIT_2D_VLC_RL(rl, static_size)\
79 static RL_VLC_ELEM rl_vlc_table[static_size];\
80 INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
81 &rl.table_vlc[0][1], 4, 2,\
82 &rl.table_vlc[0][0], 4, 2, static_size);\
84 rl.rl_vlc[0]= rl_vlc_table;\
88 static void init_2d_vlc_rl(RLTable
*rl
)
92 for(i
=0; i
<rl
->vlc
.table_size
; i
++){
93 int code
= rl
->vlc
.table
[i
][0];
94 int len
= rl
->vlc
.table
[i
][1];
97 if(len
==0){ // illegal code
100 }else if(len
<0){ //more bits needed
104 if(code
==rl
->n
){ //esc
107 }else if(code
==rl
->n
+1){ //eob
111 run
= rl
->table_run
[code
] + 1;
112 level
= rl
->table_level
[code
];
115 rl
->rl_vlc
[0][i
].len
= len
;
116 rl
->rl_vlc
[0][i
].level
= level
;
117 rl
->rl_vlc
[0][i
].run
= run
;
121 void ff_mpeg12_common_init(MpegEncContext
*s
)
125 s
->c_dc_scale_table
= ff_mpeg2_dc_scale_table
[s
->intra_dc_precision
];
129 void ff_mpeg1_clean_buffers(MpegEncContext
*s
){
130 s
->last_dc
[0] = 1 << (7 + s
->intra_dc_precision
);
131 s
->last_dc
[1] = s
->last_dc
[0];
132 s
->last_dc
[2] = s
->last_dc
[0];
133 memset(s
->last_mv
, 0, sizeof(s
->last_mv
));
137 /******************************************/
141 static VLC mbincr_vlc
;
142 static VLC mb_ptype_vlc
;
143 static VLC mb_btype_vlc
;
144 static VLC mb_pat_vlc
;
146 av_cold
void ff_mpeg12_init_vlcs(void)
153 INIT_VLC_STATIC(&dc_lum_vlc
, DC_VLC_BITS
, 12,
154 ff_mpeg12_vlc_dc_lum_bits
, 1, 1,
155 ff_mpeg12_vlc_dc_lum_code
, 2, 2, 512);
156 INIT_VLC_STATIC(&dc_chroma_vlc
, DC_VLC_BITS
, 12,
157 ff_mpeg12_vlc_dc_chroma_bits
, 1, 1,
158 ff_mpeg12_vlc_dc_chroma_code
, 2, 2, 514);
159 INIT_VLC_STATIC(&mv_vlc
, MV_VLC_BITS
, 17,
160 &ff_mpeg12_mbMotionVectorTable
[0][1], 2, 1,
161 &ff_mpeg12_mbMotionVectorTable
[0][0], 2, 1, 518);
162 INIT_VLC_STATIC(&mbincr_vlc
, MBINCR_VLC_BITS
, 36,
163 &ff_mpeg12_mbAddrIncrTable
[0][1], 2, 1,
164 &ff_mpeg12_mbAddrIncrTable
[0][0], 2, 1, 538);
165 INIT_VLC_STATIC(&mb_pat_vlc
, MB_PAT_VLC_BITS
, 64,
166 &ff_mpeg12_mbPatTable
[0][1], 2, 1,
167 &ff_mpeg12_mbPatTable
[0][0], 2, 1, 512);
169 INIT_VLC_STATIC(&mb_ptype_vlc
, MB_PTYPE_VLC_BITS
, 7,
170 &table_mb_ptype
[0][1], 2, 1,
171 &table_mb_ptype
[0][0], 2, 1, 64);
172 INIT_VLC_STATIC(&mb_btype_vlc
, MB_BTYPE_VLC_BITS
, 11,
173 &table_mb_btype
[0][1], 2, 1,
174 &table_mb_btype
[0][0], 2, 1, 64);
175 init_rl(&ff_rl_mpeg1
, ff_mpeg12_static_rl_table_store
[0]);
176 init_rl(&ff_rl_mpeg2
, ff_mpeg12_static_rl_table_store
[1]);
178 INIT_2D_VLC_RL(ff_rl_mpeg1
, 680);
179 INIT_2D_VLC_RL(ff_rl_mpeg2
, 674);
183 static inline int get_dmv(MpegEncContext
*s
)
185 if(get_bits1(&s
->gb
))
186 return 1 - (get_bits1(&s
->gb
) << 1);
191 static inline int get_qscale(MpegEncContext
*s
)
193 int qscale
= get_bits(&s
->gb
, 5);
194 if (s
->q_scale_type
) {
195 return non_linear_qscale
[qscale
];
201 /* motion type (for MPEG-2) */
207 static int mpeg_decode_mb(MpegEncContext
*s
,
208 DCTELEM block
[12][64])
210 int i
, j
, k
, cbp
, val
, mb_type
, motion_type
;
211 const int mb_block_count
= 4 + (1<< s
->chroma_format
);
213 dprintf(s
->avctx
, "decode_mb: x=%d y=%d\n", s
->mb_x
, s
->mb_y
);
215 assert(s
->mb_skipped
==0);
217 if (s
->mb_skip_run
-- != 0) {
218 if (s
->pict_type
== FF_P_TYPE
) {
220 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]= MB_TYPE_SKIP
| MB_TYPE_L0
| MB_TYPE_16x16
;
225 mb_type
= s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
- 1];
227 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
228 if(IS_INTRA(mb_type
))
231 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]=
232 mb_type
| MB_TYPE_SKIP
;
233 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
235 if((s
->mv
[0][0][0]|s
->mv
[0][0][1]|s
->mv
[1][0][0]|s
->mv
[1][0][1])==0)
242 switch(s
->pict_type
) {
245 if (get_bits1(&s
->gb
) == 0) {
246 if (get_bits1(&s
->gb
) == 0){
247 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in I Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
250 mb_type
= MB_TYPE_QUANT
| MB_TYPE_INTRA
;
252 mb_type
= MB_TYPE_INTRA
;
256 mb_type
= get_vlc2(&s
->gb
, mb_ptype_vlc
.table
, MB_PTYPE_VLC_BITS
, 1);
258 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in P Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
261 mb_type
= ptype2mb_type
[ mb_type
];
264 mb_type
= get_vlc2(&s
->gb
, mb_btype_vlc
.table
, MB_BTYPE_VLC_BITS
, 1);
266 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in B Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
269 mb_type
= btype2mb_type
[ mb_type
];
272 dprintf(s
->avctx
, "mb_type=%x\n", mb_type
);
273 // motion_type = 0; /* avoid warning */
274 if (IS_INTRA(mb_type
)) {
275 s
->dsp
.clear_blocks(s
->block
[0]);
277 if(!s
->chroma_y_shift
){
278 s
->dsp
.clear_blocks(s
->block
[6]);
281 /* compute DCT type */
282 if (s
->picture_structure
== PICT_FRAME
&& //FIXME add an interlaced_dct coded var?
283 !s
->frame_pred_frame_dct
) {
284 s
->interlaced_dct
= get_bits1(&s
->gb
);
287 if (IS_QUANT(mb_type
))
288 s
->qscale
= get_qscale(s
);
290 if (s
->concealment_motion_vectors
) {
291 /* just parse them */
292 if (s
->picture_structure
!= PICT_FRAME
)
293 skip_bits1(&s
->gb
); /* field select */
295 s
->mv
[0][0][0]= s
->last_mv
[0][0][0]= s
->last_mv
[0][1][0] =
296 mpeg_decode_motion(s
, s
->mpeg_f_code
[0][0], s
->last_mv
[0][0][0]);
297 s
->mv
[0][0][1]= s
->last_mv
[0][0][1]= s
->last_mv
[0][1][1] =
298 mpeg_decode_motion(s
, s
->mpeg_f_code
[0][1], s
->last_mv
[0][0][1]);
300 skip_bits1(&s
->gb
); /* marker */
302 memset(s
->last_mv
, 0, sizeof(s
->last_mv
)); /* reset mv prediction */
304 //if 1, we memcpy blocks in xvmcvideo
305 if(CONFIG_MPEG_XVMC_DECODER
&& s
->avctx
->xvmc_acceleration
> 1){
306 ff_xvmc_pack_pblocks(s
,-1);//inter are always full blocks
312 if (s
->codec_id
== CODEC_ID_MPEG2VIDEO
) {
313 if(s
->flags2
& CODEC_FLAG2_FAST
){
315 mpeg2_fast_decode_block_intra(s
, *s
->pblocks
[i
], i
);
318 for(i
=0;i
<mb_block_count
;i
++) {
319 if (mpeg2_decode_block_intra(s
, *s
->pblocks
[i
], i
) < 0)
325 if (mpeg1_decode_block_intra(s
, *s
->pblocks
[i
], i
) < 0)
330 if (mb_type
& MB_TYPE_ZERO_MV
){
331 assert(mb_type
& MB_TYPE_CBP
);
333 s
->mv_dir
= MV_DIR_FORWARD
;
334 if(s
->picture_structure
== PICT_FRAME
){
335 if(!s
->frame_pred_frame_dct
)
336 s
->interlaced_dct
= get_bits1(&s
->gb
);
337 s
->mv_type
= MV_TYPE_16X16
;
339 s
->mv_type
= MV_TYPE_FIELD
;
340 mb_type
|= MB_TYPE_INTERLACED
;
341 s
->field_select
[0][0]= s
->picture_structure
- 1;
344 if (IS_QUANT(mb_type
))
345 s
->qscale
= get_qscale(s
);
347 s
->last_mv
[0][0][0] = 0;
348 s
->last_mv
[0][0][1] = 0;
349 s
->last_mv
[0][1][0] = 0;
350 s
->last_mv
[0][1][1] = 0;
354 assert(mb_type
& MB_TYPE_L0L1
);
355 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
356 /* get additional motion vector type */
357 if (s
->frame_pred_frame_dct
)
358 motion_type
= MT_FRAME
;
360 motion_type
= get_bits(&s
->gb
, 2);
361 if (s
->picture_structure
== PICT_FRAME
&& HAS_CBP(mb_type
))
362 s
->interlaced_dct
= get_bits1(&s
->gb
);
365 if (IS_QUANT(mb_type
))
366 s
->qscale
= get_qscale(s
);
369 s
->mv_dir
= (mb_type
>>13)&3;
370 dprintf(s
->avctx
, "motion_type=%d\n", motion_type
);
371 switch(motion_type
) {
372 case MT_FRAME
: /* or MT_16X8 */
373 if (s
->picture_structure
== PICT_FRAME
) {
374 mb_type
|= MB_TYPE_16x16
;
375 s
->mv_type
= MV_TYPE_16X16
;
377 if (USES_LIST(mb_type
, i
)) {
379 s
->mv
[i
][0][0]= s
->last_mv
[i
][0][0]= s
->last_mv
[i
][1][0] =
380 mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0], s
->last_mv
[i
][0][0]);
381 s
->mv
[i
][0][1]= s
->last_mv
[i
][0][1]= s
->last_mv
[i
][1][1] =
382 mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1], s
->last_mv
[i
][0][1]);
383 /* full_pel: only for MPEG-1 */
385 s
->mv
[i
][0][0] <<= 1;
386 s
->mv
[i
][0][1] <<= 1;
391 mb_type
|= MB_TYPE_16x8
| MB_TYPE_INTERLACED
;
392 s
->mv_type
= MV_TYPE_16X8
;
394 if (USES_LIST(mb_type
, i
)) {
397 s
->field_select
[i
][j
] = get_bits1(&s
->gb
);
399 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][k
],
400 s
->last_mv
[i
][j
][k
]);
401 s
->last_mv
[i
][j
][k
] = val
;
402 s
->mv
[i
][j
][k
] = val
;
410 s
->mv_type
= MV_TYPE_FIELD
;
411 if (s
->picture_structure
== PICT_FRAME
) {
412 mb_type
|= MB_TYPE_16x8
| MB_TYPE_INTERLACED
;
414 if (USES_LIST(mb_type
, i
)) {
416 s
->field_select
[i
][j
] = get_bits1(&s
->gb
);
417 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0],
418 s
->last_mv
[i
][j
][0]);
419 s
->last_mv
[i
][j
][0] = val
;
420 s
->mv
[i
][j
][0] = val
;
421 dprintf(s
->avctx
, "fmx=%d\n", val
);
422 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1],
423 s
->last_mv
[i
][j
][1] >> 1);
424 s
->last_mv
[i
][j
][1] = val
<< 1;
425 s
->mv
[i
][j
][1] = val
;
426 dprintf(s
->avctx
, "fmy=%d\n", val
);
431 mb_type
|= MB_TYPE_16x16
| MB_TYPE_INTERLACED
;
433 if (USES_LIST(mb_type
, i
)) {
434 s
->field_select
[i
][0] = get_bits1(&s
->gb
);
436 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][k
],
437 s
->last_mv
[i
][0][k
]);
438 s
->last_mv
[i
][0][k
] = val
;
439 s
->last_mv
[i
][1][k
] = val
;
440 s
->mv
[i
][0][k
] = val
;
447 s
->mv_type
= MV_TYPE_DMV
;
449 if (USES_LIST(mb_type
, i
)) {
450 int dmx
, dmy
, mx
, my
, m
;
451 const int my_shift
= s
->picture_structure
== PICT_FRAME
;
453 mx
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0],
454 s
->last_mv
[i
][0][0]);
455 s
->last_mv
[i
][0][0] = mx
;
456 s
->last_mv
[i
][1][0] = mx
;
458 my
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1],
459 s
->last_mv
[i
][0][1] >> my_shift
);
463 s
->last_mv
[i
][0][1] = my
<<my_shift
;
464 s
->last_mv
[i
][1][1] = my
<<my_shift
;
468 s
->mv
[i
][1][0] = mx
;//not used
469 s
->mv
[i
][1][1] = my
;//not used
471 if (s
->picture_structure
== PICT_FRAME
) {
472 mb_type
|= MB_TYPE_16x16
| MB_TYPE_INTERLACED
;
474 //m = 1 + 2 * s->top_field_first;
475 m
= s
->top_field_first
? 1 : 3;
477 /* top -> top pred */
478 s
->mv
[i
][2][0] = ((mx
* m
+ (mx
> 0)) >> 1) + dmx
;
479 s
->mv
[i
][2][1] = ((my
* m
+ (my
> 0)) >> 1) + dmy
- 1;
481 s
->mv
[i
][3][0] = ((mx
* m
+ (mx
> 0)) >> 1) + dmx
;
482 s
->mv
[i
][3][1] = ((my
* m
+ (my
> 0)) >> 1) + dmy
+ 1;
484 mb_type
|= MB_TYPE_16x16
;
486 s
->mv
[i
][2][0] = ((mx
+ (mx
> 0)) >> 1) + dmx
;
487 s
->mv
[i
][2][1] = ((my
+ (my
> 0)) >> 1) + dmy
;
488 if(s
->picture_structure
== PICT_TOP_FIELD
)
497 av_log(s
->avctx
, AV_LOG_ERROR
, "00 motion_type at %d %d\n", s
->mb_x
, s
->mb_y
);
503 if (HAS_CBP(mb_type
)) {
504 s
->dsp
.clear_blocks(s
->block
[0]);
506 cbp
= get_vlc2(&s
->gb
, mb_pat_vlc
.table
, MB_PAT_VLC_BITS
, 1);
507 if(mb_block_count
> 6){
508 cbp
<<= mb_block_count
-6;
509 cbp
|= get_bits(&s
->gb
, mb_block_count
-6);
510 s
->dsp
.clear_blocks(s
->block
[6]);
513 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid cbp at %d %d\n", s
->mb_x
, s
->mb_y
);
517 //if 1, we memcpy blocks in xvmcvideo
518 if(CONFIG_MPEG_XVMC_DECODER
&& s
->avctx
->xvmc_acceleration
> 1){
519 ff_xvmc_pack_pblocks(s
,cbp
);
525 if (s
->codec_id
== CODEC_ID_MPEG2VIDEO
) {
526 if(s
->flags2
& CODEC_FLAG2_FAST
){
529 mpeg2_fast_decode_block_non_intra(s
, *s
->pblocks
[i
], i
);
531 s
->block_last_index
[i
] = -1;
536 cbp
<<= 12-mb_block_count
;
538 for(i
=0;i
<mb_block_count
;i
++) {
539 if ( cbp
& (1<<11) ) {
540 if (mpeg2_decode_block_non_intra(s
, *s
->pblocks
[i
], i
) < 0)
543 s
->block_last_index
[i
] = -1;
549 if(s
->flags2
& CODEC_FLAG2_FAST
){
552 mpeg1_fast_decode_block_inter(s
, *s
->pblocks
[i
], i
);
554 s
->block_last_index
[i
] = -1;
561 if (mpeg1_decode_block_inter(s
, *s
->pblocks
[i
], i
) < 0)
564 s
->block_last_index
[i
] = -1;
572 s
->block_last_index
[i
] = -1;
576 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]= mb_type
;
581 /* as H.263, but only 17 codes */
582 static int mpeg_decode_motion(MpegEncContext
*s
, int fcode
, int pred
)
584 int code
, sign
, val
, l
, shift
;
586 code
= get_vlc2(&s
->gb
, mv_vlc
.table
, MV_VLC_BITS
, 2);
594 sign
= get_bits1(&s
->gb
);
598 val
= (val
- 1) << shift
;
599 val
|= get_bits(&s
->gb
, shift
);
606 /* modulo decoding */
607 l
= INT_BIT
- 5 - shift
;
612 static inline int mpeg1_decode_block_intra(MpegEncContext
*s
,
616 int level
, dc
, diff
, i
, j
, run
;
618 RLTable
*rl
= &ff_rl_mpeg1
;
619 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
620 const uint16_t *quant_matrix
= s
->intra_matrix
;
621 const int qscale
= s
->qscale
;
624 component
= (n
<= 3 ? 0 : n
- 4 + 1);
625 diff
= decode_dc(&s
->gb
, component
);
628 dc
= s
->last_dc
[component
];
630 s
->last_dc
[component
] = dc
;
631 block
[0] = dc
*quant_matrix
[0];
632 dprintf(s
->avctx
, "dc=%d diff=%d\n", dc
, diff
);
635 OPEN_READER(re
, &s
->gb
);
636 /* now quantify & encode AC coefficients */
638 UPDATE_CACHE(re
, &s
->gb
);
639 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
643 } else if(level
!= 0) {
646 level
= (level
*qscale
*quant_matrix
[j
])>>4;
648 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
649 LAST_SKIP_BITS(re
, &s
->gb
, 1);
652 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
653 UPDATE_CACHE(re
, &s
->gb
);
654 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
656 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; LAST_SKIP_BITS(re
, &s
->gb
, 8);
657 } else if (level
== 0) {
658 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; LAST_SKIP_BITS(re
, &s
->gb
, 8);
664 level
= (level
*qscale
*quant_matrix
[j
])>>4;
668 level
= (level
*qscale
*quant_matrix
[j
])>>4;
673 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
679 CLOSE_READER(re
, &s
->gb
);
681 s
->block_last_index
[n
] = i
;
685 int ff_mpeg1_decode_block_intra(MpegEncContext
*s
,
689 return mpeg1_decode_block_intra(s
, block
, n
);
692 static inline int mpeg1_decode_block_inter(MpegEncContext
*s
,
696 int level
, i
, j
, run
;
697 RLTable
*rl
= &ff_rl_mpeg1
;
698 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
699 const uint16_t *quant_matrix
= s
->inter_matrix
;
700 const int qscale
= s
->qscale
;
703 OPEN_READER(re
, &s
->gb
);
705 // special case for first coefficient, no need to add second VLC table
706 UPDATE_CACHE(re
, &s
->gb
);
707 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
708 level
= (3*qscale
*quant_matrix
[0])>>5;
710 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
714 SKIP_BITS(re
, &s
->gb
, 2);
715 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
718 #if MIN_CACHE_BITS < 19
719 UPDATE_CACHE(re
, &s
->gb
);
721 /* now quantify & encode AC coefficients */
723 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
728 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
730 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
731 SKIP_BITS(re
, &s
->gb
, 1);
734 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
735 UPDATE_CACHE(re
, &s
->gb
);
736 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
738 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; SKIP_BITS(re
, &s
->gb
, 8);
739 } else if (level
== 0) {
740 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; SKIP_BITS(re
, &s
->gb
, 8);
746 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
750 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
755 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
760 #if MIN_CACHE_BITS < 19
761 UPDATE_CACHE(re
, &s
->gb
);
763 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
765 #if MIN_CACHE_BITS >= 19
766 UPDATE_CACHE(re
, &s
->gb
);
770 LAST_SKIP_BITS(re
, &s
->gb
, 2);
771 CLOSE_READER(re
, &s
->gb
);
773 s
->block_last_index
[n
] = i
;
777 static inline int mpeg1_fast_decode_block_inter(MpegEncContext
*s
, DCTELEM
*block
, int n
)
779 int level
, i
, j
, run
;
780 RLTable
*rl
= &ff_rl_mpeg1
;
781 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
782 const int qscale
= s
->qscale
;
785 OPEN_READER(re
, &s
->gb
);
787 // special case for first coefficient, no need to add second VLC table
788 UPDATE_CACHE(re
, &s
->gb
);
789 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
790 level
= (3*qscale
)>>1;
792 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
796 SKIP_BITS(re
, &s
->gb
, 2);
797 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
800 #if MIN_CACHE_BITS < 19
801 UPDATE_CACHE(re
, &s
->gb
);
804 /* now quantify & encode AC coefficients */
806 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
811 level
= ((level
*2+1)*qscale
)>>1;
813 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
814 SKIP_BITS(re
, &s
->gb
, 1);
817 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
818 UPDATE_CACHE(re
, &s
->gb
);
819 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
821 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; SKIP_BITS(re
, &s
->gb
, 8);
822 } else if (level
== 0) {
823 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; SKIP_BITS(re
, &s
->gb
, 8);
829 level
= ((level
*2+1)*qscale
)>>1;
833 level
= ((level
*2+1)*qscale
)>>1;
839 #if MIN_CACHE_BITS < 19
840 UPDATE_CACHE(re
, &s
->gb
);
842 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
844 #if MIN_CACHE_BITS >= 19
845 UPDATE_CACHE(re
, &s
->gb
);
849 LAST_SKIP_BITS(re
, &s
->gb
, 2);
850 CLOSE_READER(re
, &s
->gb
);
852 s
->block_last_index
[n
] = i
;
857 static inline int mpeg2_decode_block_non_intra(MpegEncContext
*s
,
861 int level
, i
, j
, run
;
862 RLTable
*rl
= &ff_rl_mpeg1
;
863 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
864 const uint16_t *quant_matrix
;
865 const int qscale
= s
->qscale
;
871 OPEN_READER(re
, &s
->gb
);
874 quant_matrix
= s
->inter_matrix
;
876 quant_matrix
= s
->chroma_inter_matrix
;
878 // special case for first coefficient, no need to add second VLC table
879 UPDATE_CACHE(re
, &s
->gb
);
880 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
881 level
= (3*qscale
*quant_matrix
[0])>>5;
882 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
887 SKIP_BITS(re
, &s
->gb
, 2);
888 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
891 #if MIN_CACHE_BITS < 19
892 UPDATE_CACHE(re
, &s
->gb
);
895 /* now quantify & encode AC coefficients */
897 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
902 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
903 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
904 SKIP_BITS(re
, &s
->gb
, 1);
907 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
908 UPDATE_CACHE(re
, &s
->gb
);
909 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
914 level
= ((-level
*2+1)*qscale
*quant_matrix
[j
])>>5;
917 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
921 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
927 #if MIN_CACHE_BITS < 19
928 UPDATE_CACHE(re
, &s
->gb
);
930 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
932 #if MIN_CACHE_BITS >= 19
933 UPDATE_CACHE(re
, &s
->gb
);
937 LAST_SKIP_BITS(re
, &s
->gb
, 2);
938 CLOSE_READER(re
, &s
->gb
);
940 block
[63] ^= (mismatch
& 1);
942 s
->block_last_index
[n
] = i
;
946 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext
*s
,
950 int level
, i
, j
, run
;
951 RLTable
*rl
= &ff_rl_mpeg1
;
952 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
953 const int qscale
= s
->qscale
;
954 OPEN_READER(re
, &s
->gb
);
957 // special case for first coefficient, no need to add second VLC table
958 UPDATE_CACHE(re
, &s
->gb
);
959 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
960 level
= (3*qscale
)>>1;
961 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
965 SKIP_BITS(re
, &s
->gb
, 2);
966 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
969 #if MIN_CACHE_BITS < 19
970 UPDATE_CACHE(re
, &s
->gb
);
973 /* now quantify & encode AC coefficients */
975 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
980 level
= ((level
*2+1)*qscale
)>>1;
981 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
982 SKIP_BITS(re
, &s
->gb
, 1);
985 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
986 UPDATE_CACHE(re
, &s
->gb
);
987 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
992 level
= ((-level
*2+1)*qscale
)>>1;
995 level
= ((level
*2+1)*qscale
)>>1;
1000 #if MIN_CACHE_BITS < 19
1001 UPDATE_CACHE(re
, &s
->gb
);
1003 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
1005 #if MIN_CACHE_BITS >=19
1006 UPDATE_CACHE(re
, &s
->gb
);
1010 LAST_SKIP_BITS(re
, &s
->gb
, 2);
1011 CLOSE_READER(re
, &s
->gb
);
1012 s
->block_last_index
[n
] = i
;
1017 static inline int mpeg2_decode_block_intra(MpegEncContext
*s
,
1021 int level
, dc
, diff
, i
, j
, run
;
1024 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
1025 const uint16_t *quant_matrix
;
1026 const int qscale
= s
->qscale
;
1029 /* DC coefficient */
1031 quant_matrix
= s
->intra_matrix
;
1034 quant_matrix
= s
->chroma_intra_matrix
;
1035 component
= (n
&1) + 1;
1037 diff
= decode_dc(&s
->gb
, component
);
1040 dc
= s
->last_dc
[component
];
1042 s
->last_dc
[component
] = dc
;
1043 block
[0] = dc
<< (3 - s
->intra_dc_precision
);
1044 dprintf(s
->avctx
, "dc=%d\n", block
[0]);
1045 mismatch
= block
[0] ^ 1;
1047 if (s
->intra_vlc_format
)
1053 OPEN_READER(re
, &s
->gb
);
1054 /* now quantify & encode AC coefficients */
1056 UPDATE_CACHE(re
, &s
->gb
);
1057 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
1061 } else if(level
!= 0) {
1064 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1065 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
1066 LAST_SKIP_BITS(re
, &s
->gb
, 1);
1069 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
1070 UPDATE_CACHE(re
, &s
->gb
);
1071 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
1075 level
= (-level
*qscale
*quant_matrix
[j
])>>4;
1078 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1082 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
1089 CLOSE_READER(re
, &s
->gb
);
1091 block
[63]^= mismatch
&1;
1093 s
->block_last_index
[n
] = i
;
1097 static inline int mpeg2_fast_decode_block_intra(MpegEncContext
*s
,
1101 int level
, dc
, diff
, j
, run
;
1104 uint8_t * scantable
= s
->intra_scantable
.permutated
;
1105 const uint16_t *quant_matrix
;
1106 const int qscale
= s
->qscale
;
1108 /* DC coefficient */
1110 quant_matrix
= s
->intra_matrix
;
1113 quant_matrix
= s
->chroma_intra_matrix
;
1114 component
= (n
&1) + 1;
1116 diff
= decode_dc(&s
->gb
, component
);
1119 dc
= s
->last_dc
[component
];
1121 s
->last_dc
[component
] = dc
;
1122 block
[0] = dc
<< (3 - s
->intra_dc_precision
);
1123 if (s
->intra_vlc_format
)
1129 OPEN_READER(re
, &s
->gb
);
1130 /* now quantify & encode AC coefficients */
1132 UPDATE_CACHE(re
, &s
->gb
);
1133 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
1137 } else if(level
!= 0) {
1140 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1141 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
1142 LAST_SKIP_BITS(re
, &s
->gb
, 1);
1145 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
1146 UPDATE_CACHE(re
, &s
->gb
);
1147 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
1151 level
= (-level
*qscale
*quant_matrix
[j
])>>4;
1154 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1160 CLOSE_READER(re
, &s
->gb
);
1163 s
->block_last_index
[n
] = scantable
- s
->intra_scantable
.permutated
;
1167 typedef struct Mpeg1Context
{
1168 MpegEncContext mpeg_enc_ctx
;
1169 int mpeg_enc_ctx_allocated
; /* true if decoding context allocated */
1170 int repeat_field
; /* true if we must repeat the field */
1171 AVPanScan pan_scan
; /** some temporary storage for the panscan */
1173 int swap_uv
;//indicate VCR2
1174 int save_aspect_info
;
1175 int save_width
, save_height
, save_progressive_seq
;
1176 AVRational frame_rate_ext
; ///< MPEG-2 specific framerate modificator
1177 int sync
; ///< Did we reach a sync point like a GOP/SEQ/KEYFrame?
1180 static av_cold
int mpeg_decode_init(AVCodecContext
*avctx
)
1182 Mpeg1Context
*s
= avctx
->priv_data
;
1183 MpegEncContext
*s2
= &s
->mpeg_enc_ctx
;
1186 /* we need some permutation to store matrices,
1187 * until MPV_common_init() sets the real permutation. */
1189 s2
->dsp
.idct_permutation
[i
]=i
;
1191 MPV_decode_defaults(s2
);
1193 s
->mpeg_enc_ctx
.avctx
= avctx
;
1194 s
->mpeg_enc_ctx
.flags
= avctx
->flags
;
1195 s
->mpeg_enc_ctx
.flags2
= avctx
->flags2
;
1196 ff_mpeg12_common_init(&s
->mpeg_enc_ctx
);
1197 ff_mpeg12_init_vlcs();
1199 s
->mpeg_enc_ctx_allocated
= 0;
1200 s
->mpeg_enc_ctx
.picture_number
= 0;
1201 s
->repeat_field
= 0;
1202 s
->mpeg_enc_ctx
.codec_id
= avctx
->codec
->id
;
1203 avctx
->color_range
= AVCOL_RANGE_MPEG
;
1204 if (avctx
->codec
->id
== CODEC_ID_MPEG1VIDEO
)
1205 avctx
->chroma_sample_location
= AVCHROMA_LOC_CENTER
;
1207 avctx
->chroma_sample_location
= AVCHROMA_LOC_LEFT
;
1211 static void quant_matrix_rebuild(uint16_t *matrix
, const uint8_t *old_perm
,
1212 const uint8_t *new_perm
){
1213 uint16_t temp_matrix
[64];
1216 memcpy(temp_matrix
,matrix
,64*sizeof(uint16_t));
1219 matrix
[new_perm
[i
]] = temp_matrix
[old_perm
[i
]];
1223 static enum PixelFormat
mpeg_get_pixelformat(AVCodecContext
*avctx
){
1224 Mpeg1Context
*s1
= avctx
->priv_data
;
1225 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1227 if(avctx
->xvmc_acceleration
)
1228 return avctx
->get_format(avctx
,pixfmt_xvmc_mpg2_420
);
1229 else if(avctx
->codec
->capabilities
&CODEC_CAP_HWACCEL_VDPAU
){
1230 if(avctx
->codec_id
== CODEC_ID_MPEG1VIDEO
)
1231 return PIX_FMT_VDPAU_MPEG1
;
1233 return PIX_FMT_VDPAU_MPEG2
;
1235 if(s
->chroma_format
< 2)
1236 return avctx
->get_format(avctx
,ff_hwaccel_pixfmt_list_420
);
1237 else if(s
->chroma_format
== 2)
1238 return PIX_FMT_YUV422P
;
1240 return PIX_FMT_YUV444P
;
1244 /* Call this function when we know all parameters.
1245 * It may be called in different places for MPEG-1 and MPEG-2. */
1246 static int mpeg_decode_postinit(AVCodecContext
*avctx
){
1247 Mpeg1Context
*s1
= avctx
->priv_data
;
1248 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1249 uint8_t old_permutation
[64];
1252 (s1
->mpeg_enc_ctx_allocated
== 0)||
1253 avctx
->coded_width
!= s
->width
||
1254 avctx
->coded_height
!= s
->height
||
1255 s1
->save_width
!= s
->width
||
1256 s1
->save_height
!= s
->height
||
1257 s1
->save_aspect_info
!= s
->aspect_ratio_info
||
1258 s1
->save_progressive_seq
!= s
->progressive_sequence
||
1262 if (s1
->mpeg_enc_ctx_allocated
) {
1263 ParseContext pc
= s
->parse_context
;
1264 s
->parse_context
.buffer
=0;
1266 s
->parse_context
= pc
;
1269 if( (s
->width
== 0 )||(s
->height
== 0))
1272 avcodec_set_dimensions(avctx
, s
->width
, s
->height
);
1273 avctx
->bit_rate
= s
->bit_rate
;
1274 s1
->save_aspect_info
= s
->aspect_ratio_info
;
1275 s1
->save_width
= s
->width
;
1276 s1
->save_height
= s
->height
;
1277 s1
->save_progressive_seq
= s
->progressive_sequence
;
1279 /* low_delay may be forced, in this case we will have B-frames
1280 * that behave like P-frames. */
1281 avctx
->has_b_frames
= !(s
->low_delay
);
1283 assert((avctx
->sub_id
==1) == (avctx
->codec_id
==CODEC_ID_MPEG1VIDEO
));
1284 if(avctx
->codec_id
==CODEC_ID_MPEG1VIDEO
){
1286 avctx
->time_base
.den
= ff_frame_rate_tab
[s
->frame_rate_index
].num
;
1287 avctx
->time_base
.num
= ff_frame_rate_tab
[s
->frame_rate_index
].den
;
1289 avctx
->sample_aspect_ratio
= av_d2q(
1290 1.0/ff_mpeg1_aspect
[s
->aspect_ratio_info
], 255);
1291 avctx
->ticks_per_frame
=1;
1295 &s
->avctx
->time_base
.den
,
1296 &s
->avctx
->time_base
.num
,
1297 ff_frame_rate_tab
[s
->frame_rate_index
].num
* s1
->frame_rate_ext
.num
*2,
1298 ff_frame_rate_tab
[s
->frame_rate_index
].den
* s1
->frame_rate_ext
.den
,
1300 avctx
->ticks_per_frame
=2;
1302 if(s
->aspect_ratio_info
> 1){
1303 //we ignore the spec here as reality does not match the spec, see for example
1304 // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
1305 if( (s1
->pan_scan
.width
== 0 )||(s1
->pan_scan
.height
== 0) || 1){
1306 s
->avctx
->sample_aspect_ratio
=
1308 ff_mpeg2_aspect
[s
->aspect_ratio_info
],
1309 (AVRational
){s
->width
, s
->height
}
1312 s
->avctx
->sample_aspect_ratio
=
1314 ff_mpeg2_aspect
[s
->aspect_ratio_info
],
1315 (AVRational
){s1
->pan_scan
.width
, s1
->pan_scan
.height
}
1319 s
->avctx
->sample_aspect_ratio
=
1320 ff_mpeg2_aspect
[s
->aspect_ratio_info
];
1324 avctx
->pix_fmt
= mpeg_get_pixelformat(avctx
);
1325 avctx
->hwaccel
= ff_find_hwaccel(avctx
->codec
->id
, avctx
->pix_fmt
);
1326 //until then pix_fmt may be changed right after codec init
1327 if( avctx
->pix_fmt
== PIX_FMT_XVMC_MPEG2_IDCT
||
1329 s
->avctx
->codec
->capabilities
&CODEC_CAP_HWACCEL_VDPAU
)
1330 if( avctx
->idct_algo
== FF_IDCT_AUTO
)
1331 avctx
->idct_algo
= FF_IDCT_SIMPLE
;
1333 /* Quantization matrices may need reordering
1334 * if DCT permutation is changed. */
1335 memcpy(old_permutation
,s
->dsp
.idct_permutation
,64*sizeof(uint8_t));
1337 if (MPV_common_init(s
) < 0)
1340 quant_matrix_rebuild(s
->intra_matrix
, old_permutation
,s
->dsp
.idct_permutation
);
1341 quant_matrix_rebuild(s
->inter_matrix
, old_permutation
,s
->dsp
.idct_permutation
);
1342 quant_matrix_rebuild(s
->chroma_intra_matrix
,old_permutation
,s
->dsp
.idct_permutation
);
1343 quant_matrix_rebuild(s
->chroma_inter_matrix
,old_permutation
,s
->dsp
.idct_permutation
);
1345 s1
->mpeg_enc_ctx_allocated
= 1;
1350 static int mpeg1_decode_picture(AVCodecContext
*avctx
,
1351 const uint8_t *buf
, int buf_size
)
1353 Mpeg1Context
*s1
= avctx
->priv_data
;
1354 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1355 int ref
, f_code
, vbv_delay
;
1357 init_get_bits(&s
->gb
, buf
, buf_size
*8);
1359 ref
= get_bits(&s
->gb
, 10); /* temporal ref */
1360 s
->pict_type
= get_bits(&s
->gb
, 3);
1361 if(s
->pict_type
== 0 || s
->pict_type
> 3)
1364 vbv_delay
= get_bits(&s
->gb
, 16);
1365 if (s
->pict_type
== FF_P_TYPE
|| s
->pict_type
== FF_B_TYPE
) {
1366 s
->full_pel
[0] = get_bits1(&s
->gb
);
1367 f_code
= get_bits(&s
->gb
, 3);
1368 if (f_code
== 0 && avctx
->error_recognition
>= FF_ER_COMPLIANT
)
1370 s
->mpeg_f_code
[0][0] = f_code
;
1371 s
->mpeg_f_code
[0][1] = f_code
;
1373 if (s
->pict_type
== FF_B_TYPE
) {
1374 s
->full_pel
[1] = get_bits1(&s
->gb
);
1375 f_code
= get_bits(&s
->gb
, 3);
1376 if (f_code
== 0 && avctx
->error_recognition
>= FF_ER_COMPLIANT
)
1378 s
->mpeg_f_code
[1][0] = f_code
;
1379 s
->mpeg_f_code
[1][1] = f_code
;
1381 s
->current_picture
.pict_type
= s
->pict_type
;
1382 s
->current_picture
.key_frame
= s
->pict_type
== FF_I_TYPE
;
1384 if(avctx
->debug
& FF_DEBUG_PICT_INFO
)
1385 av_log(avctx
, AV_LOG_DEBUG
, "vbv_delay %d, ref %d type:%d\n", vbv_delay
, ref
, s
->pict_type
);
1392 static void mpeg_decode_sequence_extension(Mpeg1Context
*s1
)
1394 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1395 int horiz_size_ext
, vert_size_ext
;
1398 skip_bits(&s
->gb
, 1); /* profile and level esc*/
1399 s
->avctx
->profile
= get_bits(&s
->gb
, 3);
1400 s
->avctx
->level
= get_bits(&s
->gb
, 4);
1401 s
->progressive_sequence
= get_bits1(&s
->gb
); /* progressive_sequence */
1402 s
->chroma_format
= get_bits(&s
->gb
, 2); /* chroma_format 1=420, 2=422, 3=444 */
1403 horiz_size_ext
= get_bits(&s
->gb
, 2);
1404 vert_size_ext
= get_bits(&s
->gb
, 2);
1405 s
->width
|= (horiz_size_ext
<< 12);
1406 s
->height
|= (vert_size_ext
<< 12);
1407 bit_rate_ext
= get_bits(&s
->gb
, 12); /* XXX: handle it */
1408 s
->bit_rate
+= (bit_rate_ext
<< 18) * 400;
1409 skip_bits1(&s
->gb
); /* marker */
1410 s
->avctx
->rc_buffer_size
+= get_bits(&s
->gb
, 8)*1024*16<<10;
1412 s
->low_delay
= get_bits1(&s
->gb
);
1413 if(s
->flags
& CODEC_FLAG_LOW_DELAY
) s
->low_delay
=1;
1415 s1
->frame_rate_ext
.num
= get_bits(&s
->gb
, 2)+1;
1416 s1
->frame_rate_ext
.den
= get_bits(&s
->gb
, 5)+1;
1418 dprintf(s
->avctx
, "sequence extension\n");
1419 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG2VIDEO
;
1420 s
->avctx
->sub_id
= 2; /* indicates MPEG-2 found */
1422 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1423 av_log(s
->avctx
, AV_LOG_DEBUG
, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1424 s
->avctx
->profile
, s
->avctx
->level
, s
->avctx
->rc_buffer_size
, s
->bit_rate
);
1428 static void mpeg_decode_sequence_display_extension(Mpeg1Context
*s1
)
1430 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1431 int color_description
, w
, h
;
1433 skip_bits(&s
->gb
, 3); /* video format */
1434 color_description
= get_bits1(&s
->gb
);
1435 if(color_description
){
1436 s
->avctx
->color_primaries
= get_bits(&s
->gb
, 8);
1437 s
->avctx
->color_trc
= get_bits(&s
->gb
, 8);
1438 s
->avctx
->colorspace
= get_bits(&s
->gb
, 8);
1440 w
= get_bits(&s
->gb
, 14);
1441 skip_bits(&s
->gb
, 1); //marker
1442 h
= get_bits(&s
->gb
, 14);
1443 skip_bits(&s
->gb
, 1); //marker
1445 s1
->pan_scan
.width
= 16*w
;
1446 s1
->pan_scan
.height
=16*h
;
1448 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1449 av_log(s
->avctx
, AV_LOG_DEBUG
, "sde w:%d, h:%d\n", w
, h
);
1452 static void mpeg_decode_picture_display_extension(Mpeg1Context
*s1
)
1454 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1458 if(s
->progressive_sequence
){
1459 if(s
->repeat_first_field
){
1461 if(s
->top_field_first
)
1465 if(s
->picture_structure
== PICT_FRAME
){
1467 if(s
->repeat_first_field
)
1471 for(i
=0; i
<nofco
; i
++){
1472 s1
->pan_scan
.position
[i
][0]= get_sbits(&s
->gb
, 16);
1473 skip_bits(&s
->gb
, 1); //marker
1474 s1
->pan_scan
.position
[i
][1]= get_sbits(&s
->gb
, 16);
1475 skip_bits(&s
->gb
, 1); //marker
1478 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1479 av_log(s
->avctx
, AV_LOG_DEBUG
, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1480 s1
->pan_scan
.position
[0][0], s1
->pan_scan
.position
[0][1],
1481 s1
->pan_scan
.position
[1][0], s1
->pan_scan
.position
[1][1],
1482 s1
->pan_scan
.position
[2][0], s1
->pan_scan
.position
[2][1]
1486 static int load_matrix(MpegEncContext
*s
, uint16_t matrix0
[64], uint16_t matrix1
[64], int intra
){
1489 for(i
=0; i
<64; i
++) {
1490 int j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1491 int v
= get_bits(&s
->gb
, 8);
1493 av_log(s
->avctx
, AV_LOG_ERROR
, "matrix damaged\n");
1496 if(intra
&& i
==0 && v
!=8){
1497 av_log(s
->avctx
, AV_LOG_ERROR
, "intra matrix invalid, ignoring\n");
1498 v
= 8; // needed by pink.mpg / issue1046
1507 static void mpeg_decode_quant_matrix_extension(MpegEncContext
*s
)
1509 dprintf(s
->avctx
, "matrix extension\n");
1511 if(get_bits1(&s
->gb
)) load_matrix(s
, s
->chroma_intra_matrix
, s
->intra_matrix
, 1);
1512 if(get_bits1(&s
->gb
)) load_matrix(s
, s
->chroma_inter_matrix
, s
->inter_matrix
, 0);
1513 if(get_bits1(&s
->gb
)) load_matrix(s
, s
->chroma_intra_matrix
, NULL
, 1);
1514 if(get_bits1(&s
->gb
)) load_matrix(s
, s
->chroma_inter_matrix
, NULL
, 0);
1517 static void mpeg_decode_picture_coding_extension(Mpeg1Context
*s1
)
1519 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1521 s
->full_pel
[0] = s
->full_pel
[1] = 0;
1522 s
->mpeg_f_code
[0][0] = get_bits(&s
->gb
, 4);
1523 s
->mpeg_f_code
[0][1] = get_bits(&s
->gb
, 4);
1524 s
->mpeg_f_code
[1][0] = get_bits(&s
->gb
, 4);
1525 s
->mpeg_f_code
[1][1] = get_bits(&s
->gb
, 4);
1526 if(!s
->pict_type
&& s1
->mpeg_enc_ctx_allocated
){
1527 av_log(s
->avctx
, AV_LOG_ERROR
, "Missing picture start code, guessing missing values\n");
1528 if(s
->mpeg_f_code
[1][0] == 15 && s
->mpeg_f_code
[1][1]==15){
1529 if(s
->mpeg_f_code
[0][0] == 15 && s
->mpeg_f_code
[0][1] == 15)
1530 s
->pict_type
= FF_I_TYPE
;
1532 s
->pict_type
= FF_P_TYPE
;
1534 s
->pict_type
= FF_B_TYPE
;
1535 s
->current_picture
.pict_type
= s
->pict_type
;
1536 s
->current_picture
.key_frame
= s
->pict_type
== FF_I_TYPE
;
1538 s
->intra_dc_precision
= get_bits(&s
->gb
, 2);
1539 s
->picture_structure
= get_bits(&s
->gb
, 2);
1540 s
->top_field_first
= get_bits1(&s
->gb
);
1541 s
->frame_pred_frame_dct
= get_bits1(&s
->gb
);
1542 s
->concealment_motion_vectors
= get_bits1(&s
->gb
);
1543 s
->q_scale_type
= get_bits1(&s
->gb
);
1544 s
->intra_vlc_format
= get_bits1(&s
->gb
);
1545 s
->alternate_scan
= get_bits1(&s
->gb
);
1546 s
->repeat_first_field
= get_bits1(&s
->gb
);
1547 s
->chroma_420_type
= get_bits1(&s
->gb
);
1548 s
->progressive_frame
= get_bits1(&s
->gb
);
1550 if(s
->progressive_sequence
&& !s
->progressive_frame
){
1551 s
->progressive_frame
= 1;
1552 av_log(s
->avctx
, AV_LOG_ERROR
, "interlaced frame in progressive sequence, ignoring\n");
1555 if(s
->picture_structure
==0 || (s
->progressive_frame
&& s
->picture_structure
!=PICT_FRAME
)){
1556 av_log(s
->avctx
, AV_LOG_ERROR
, "picture_structure %d invalid, ignoring\n", s
->picture_structure
);
1557 s
->picture_structure
= PICT_FRAME
;
1560 if(s
->progressive_sequence
&& !s
->frame_pred_frame_dct
){
1561 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid frame_pred_frame_dct\n");
1562 s
->frame_pred_frame_dct
= 1;
1565 if(s
->picture_structure
== PICT_FRAME
){
1567 s
->v_edge_pos
= 16*s
->mb_height
;
1569 s
->first_field
^= 1;
1570 s
->v_edge_pos
= 8*s
->mb_height
;
1571 memset(s
->mbskip_table
, 0, s
->mb_stride
*s
->mb_height
);
1574 if(s
->alternate_scan
){
1575 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->inter_scantable
, ff_alternate_vertical_scan
);
1576 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->intra_scantable
, ff_alternate_vertical_scan
);
1578 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->inter_scantable
, ff_zigzag_direct
);
1579 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->intra_scantable
, ff_zigzag_direct
);
1582 /* composite display not parsed */
1583 dprintf(s
->avctx
, "intra_dc_precision=%d\n", s
->intra_dc_precision
);
1584 dprintf(s
->avctx
, "picture_structure=%d\n", s
->picture_structure
);
1585 dprintf(s
->avctx
, "top field first=%d\n", s
->top_field_first
);
1586 dprintf(s
->avctx
, "repeat first field=%d\n", s
->repeat_first_field
);
1587 dprintf(s
->avctx
, "conceal=%d\n", s
->concealment_motion_vectors
);
1588 dprintf(s
->avctx
, "intra_vlc_format=%d\n", s
->intra_vlc_format
);
1589 dprintf(s
->avctx
, "alternate_scan=%d\n", s
->alternate_scan
);
1590 dprintf(s
->avctx
, "frame_pred_frame_dct=%d\n", s
->frame_pred_frame_dct
);
1591 dprintf(s
->avctx
, "progressive_frame=%d\n", s
->progressive_frame
);
1594 static void exchange_uv(MpegEncContext
*s
){
1597 tmp
= s
->pblocks
[4];
1598 s
->pblocks
[4] = s
->pblocks
[5];
1599 s
->pblocks
[5] = tmp
;
1602 static int mpeg_field_start(MpegEncContext
*s
, const uint8_t *buf
, int buf_size
){
1603 AVCodecContext
*avctx
= s
->avctx
;
1604 Mpeg1Context
*s1
= (Mpeg1Context
*)s
;
1606 /* start frame decoding */
1607 if(s
->first_field
|| s
->picture_structure
==PICT_FRAME
){
1608 if(MPV_frame_start(s
, avctx
) < 0)
1611 ff_er_frame_start(s
);
1613 /* first check if we must repeat the frame */
1614 s
->current_picture_ptr
->repeat_pict
= 0;
1615 if (s
->repeat_first_field
) {
1616 if (s
->progressive_sequence
) {
1617 if (s
->top_field_first
)
1618 s
->current_picture_ptr
->repeat_pict
= 4;
1620 s
->current_picture_ptr
->repeat_pict
= 2;
1621 } else if (s
->progressive_frame
) {
1622 s
->current_picture_ptr
->repeat_pict
= 1;
1626 *s
->current_picture_ptr
->pan_scan
= s1
->pan_scan
;
1627 }else{ //second field
1630 if(!s
->current_picture_ptr
){
1631 av_log(s
->avctx
, AV_LOG_ERROR
, "first field missing\n");
1636 s
->current_picture
.data
[i
] = s
->current_picture_ptr
->data
[i
];
1637 if(s
->picture_structure
== PICT_BOTTOM_FIELD
){
1638 s
->current_picture
.data
[i
] += s
->current_picture_ptr
->linesize
[i
];
1643 if (avctx
->hwaccel
) {
1644 if (avctx
->hwaccel
->start_frame(avctx
, buf
, buf_size
) < 0)
1648 // MPV_frame_start will call this function too,
1649 // but we need to call it on every field
1650 if(CONFIG_MPEG_XVMC_DECODER
&& s
->avctx
->xvmc_acceleration
)
1651 if(ff_xvmc_field_start(s
,avctx
) < 0)
1657 #define DECODE_SLICE_ERROR -1
1658 #define DECODE_SLICE_OK 0
1661 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
1662 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
1663 * DECODE_SLICE_OK if this slice is ok<br>
1665 static int mpeg_decode_slice(Mpeg1Context
*s1
, int mb_y
,
1666 const uint8_t **buf
, int buf_size
)
1668 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1669 AVCodecContext
*avctx
= s
->avctx
;
1670 const int field_pic
= s
->picture_structure
!= PICT_FRAME
;
1671 const int lowres
= s
->avctx
->lowres
;
1676 assert(mb_y
< s
->mb_height
);
1678 init_get_bits(&s
->gb
, *buf
, buf_size
*8);
1680 ff_mpeg1_clean_buffers(s
);
1681 s
->interlaced_dct
= 0;
1683 s
->qscale
= get_qscale(s
);
1686 av_log(s
->avctx
, AV_LOG_ERROR
, "qscale == 0\n");
1690 /* extra slice info */
1691 while (get_bits1(&s
->gb
) != 0) {
1692 skip_bits(&s
->gb
, 8);
1697 if(mb_y
==0 && s
->codec_tag
== AV_RL32("SLIF")){
1701 int code
= get_vlc2(&s
->gb
, mbincr_vlc
.table
, MBINCR_VLC_BITS
, 2);
1703 av_log(s
->avctx
, AV_LOG_ERROR
, "first mb_incr damaged\n");
1710 /* otherwise, stuffing, nothing to do */
1718 if(s
->mb_x
>= (unsigned)s
->mb_width
){
1719 av_log(s
->avctx
, AV_LOG_ERROR
, "initial skip overflow\n");
1723 if (avctx
->hwaccel
) {
1724 const uint8_t *buf_end
, *buf_start
= *buf
- 4; /* include start_code */
1725 int start_code
= -1;
1726 buf_end
= ff_find_start_code(buf_start
+ 2, *buf
+ buf_size
, &start_code
);
1727 if (buf_end
< *buf
+ buf_size
)
1730 if (avctx
->hwaccel
->decode_slice(avctx
, buf_start
, buf_end
- buf_start
) < 0)
1731 return DECODE_SLICE_ERROR
;
1733 return DECODE_SLICE_OK
;
1736 s
->resync_mb_x
= s
->mb_x
;
1737 s
->resync_mb_y
= s
->mb_y
= mb_y
;
1739 ff_init_block_index(s
);
1741 if (s
->mb_y
==0 && s
->mb_x
==0 && (s
->first_field
|| s
->picture_structure
==PICT_FRAME
)) {
1742 if(s
->avctx
->debug
&FF_DEBUG_PICT_INFO
){
1743 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",
1744 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],
1745 s
->pict_type
== FF_I_TYPE
? "I" : (s
->pict_type
== FF_P_TYPE
? "P" : (s
->pict_type
== FF_B_TYPE
? "B" : "S")),
1746 s
->progressive_sequence
? "ps" :"", s
->progressive_frame
? "pf" : "", s
->alternate_scan
? "alt" :"", s
->top_field_first
? "top" :"",
1747 s
->intra_dc_precision
, s
->picture_structure
, s
->frame_pred_frame_dct
, s
->concealment_motion_vectors
,
1748 s
->q_scale_type
, s
->intra_vlc_format
, s
->repeat_first_field
, s
->chroma_420_type
? "420" :"");
1753 //If 1, we memcpy blocks in xvmcvideo.
1754 if(CONFIG_MPEG_XVMC_DECODER
&& s
->avctx
->xvmc_acceleration
> 1)
1755 ff_xvmc_init_block(s
);//set s->block
1757 if(mpeg_decode_mb(s
, s
->block
) < 0)
1760 if(s
->current_picture
.motion_val
[0] && !s
->encoding
){ //note motion_val is normally NULL unless we want to extract the MVs
1761 const int wrap
= s
->b8_stride
;
1762 int xy
= s
->mb_x
*2 + s
->mb_y
*2*wrap
;
1763 int b8_xy
= 4*(s
->mb_x
+ s
->mb_y
*s
->mb_stride
);
1764 int motion_x
, motion_y
, dir
, i
;
1767 for(dir
=0; dir
<2; dir
++){
1768 if (s
->mb_intra
|| (dir
==1 && s
->pict_type
!= FF_B_TYPE
)) {
1769 motion_x
= motion_y
= 0;
1770 }else if (s
->mv_type
== MV_TYPE_16X16
|| (s
->mv_type
== MV_TYPE_FIELD
&& field_pic
)){
1771 motion_x
= s
->mv
[dir
][0][0];
1772 motion_y
= s
->mv
[dir
][0][1];
1773 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1774 motion_x
= s
->mv
[dir
][i
][0];
1775 motion_y
= s
->mv
[dir
][i
][1];
1778 s
->current_picture
.motion_val
[dir
][xy
][0] = motion_x
;
1779 s
->current_picture
.motion_val
[dir
][xy
][1] = motion_y
;
1780 s
->current_picture
.motion_val
[dir
][xy
+ 1][0] = motion_x
;
1781 s
->current_picture
.motion_val
[dir
][xy
+ 1][1] = motion_y
;
1782 s
->current_picture
.ref_index
[dir
][b8_xy
]=
1783 s
->current_picture
.ref_index
[dir
][b8_xy
+ 1]= s
->field_select
[dir
][i
];
1784 assert(s
->field_select
[dir
][i
]==0 || s
->field_select
[dir
][i
]==1);
1791 s
->dest
[0] += 16 >> lowres
;
1792 s
->dest
[1] +=(16 >> lowres
) >> s
->chroma_x_shift
;
1793 s
->dest
[2] +=(16 >> lowres
) >> s
->chroma_x_shift
;
1795 MPV_decode_mb(s
, s
->block
);
1797 if (++s
->mb_x
>= s
->mb_width
) {
1798 const int mb_size
= 16>>s
->avctx
->lowres
;
1800 ff_draw_horiz_band(s
, mb_size
*(s
->mb_y
>>field_pic
), mb_size
);
1803 s
->mb_y
+= 1<<field_pic
;
1805 if(s
->mb_y
>= s
->mb_height
){
1806 int left
= get_bits_left(&s
->gb
);
1807 int is_d10
= s
->chroma_format
==2 && s
->pict_type
==FF_I_TYPE
&& avctx
->profile
==0 && avctx
->level
==5
1808 && s
->intra_dc_precision
== 2 && s
->q_scale_type
== 1 && s
->alternate_scan
== 0
1809 && s
->progressive_frame
== 0 /* vbv_delay == 0xBBB || 0xE10*/;
1811 if(left
< 0 || (left
&& show_bits(&s
->gb
, FFMIN(left
, 23)) && !is_d10
)
1812 || (avctx
->error_recognition
>= FF_ER_AGGRESSIVE
&& left
>8)){
1813 av_log(avctx
, AV_LOG_ERROR
, "end mismatch left=%d %0X\n", left
, show_bits(&s
->gb
, FFMIN(left
, 23)));
1819 ff_init_block_index(s
);
1822 /* skip mb handling */
1823 if (s
->mb_skip_run
== -1) {
1824 /* read increment again */
1827 int code
= get_vlc2(&s
->gb
, mbincr_vlc
.table
, MBINCR_VLC_BITS
, 2);
1829 av_log(s
->avctx
, AV_LOG_ERROR
, "mb incr damaged\n");
1834 s
->mb_skip_run
+= 33;
1835 }else if(code
== 35){
1836 if(s
->mb_skip_run
!= 0 || show_bits(&s
->gb
, 15) != 0){
1837 av_log(s
->avctx
, AV_LOG_ERROR
, "slice mismatch\n");
1840 goto eos
; /* end of slice */
1842 /* otherwise, stuffing, nothing to do */
1844 s
->mb_skip_run
+= code
;
1850 if(s
->pict_type
== FF_I_TYPE
){
1851 av_log(s
->avctx
, AV_LOG_ERROR
, "skipped MB in I frame at %d %d\n", s
->mb_x
, s
->mb_y
);
1858 s
->block_last_index
[i
] = -1;
1859 if(s
->picture_structure
== PICT_FRAME
)
1860 s
->mv_type
= MV_TYPE_16X16
;
1862 s
->mv_type
= MV_TYPE_FIELD
;
1863 if (s
->pict_type
== FF_P_TYPE
) {
1864 /* if P type, zero motion vector is implied */
1865 s
->mv_dir
= MV_DIR_FORWARD
;
1866 s
->mv
[0][0][0] = s
->mv
[0][0][1] = 0;
1867 s
->last_mv
[0][0][0] = s
->last_mv
[0][0][1] = 0;
1868 s
->last_mv
[0][1][0] = s
->last_mv
[0][1][1] = 0;
1869 s
->field_select
[0][0]= (s
->picture_structure
- 1) & 1;
1871 /* if B type, reuse previous vectors and directions */
1872 s
->mv
[0][0][0] = s
->last_mv
[0][0][0];
1873 s
->mv
[0][0][1] = s
->last_mv
[0][0][1];
1874 s
->mv
[1][0][0] = s
->last_mv
[1][0][0];
1875 s
->mv
[1][0][1] = s
->last_mv
[1][0][1];
1880 eos
: // end of slice
1881 *buf
+= (get_bits_count(&s
->gb
)-1)/8;
1882 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1886 static int slice_decode_thread(AVCodecContext
*c
, void *arg
){
1887 MpegEncContext
*s
= *(void**)arg
;
1888 const uint8_t *buf
= s
->gb
.buffer
;
1889 int mb_y
= s
->start_mb_y
;
1890 const int field_pic
= s
->picture_structure
!= PICT_FRAME
;
1892 s
->error_count
= (3*(s
->end_mb_y
- s
->start_mb_y
)*s
->mb_width
) >> field_pic
;
1895 uint32_t start_code
;
1898 ret
= mpeg_decode_slice((Mpeg1Context
*)s
, mb_y
, &buf
, s
->gb
.buffer_end
- buf
);
1900 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1901 //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);
1903 if(s
->resync_mb_x
>=0 && s
->resync_mb_y
>=0)
1904 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
);
1906 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
);
1909 if(s
->mb_y
== s
->end_mb_y
)
1913 buf
= ff_find_start_code(buf
, s
->gb
.buffer_end
, &start_code
);
1914 mb_y
= start_code
- SLICE_MIN_START_CODE
;
1915 if(mb_y
< 0 || mb_y
>= s
->end_mb_y
)
1919 return 0; //not reached
1923 * Handles slice ends.
1924 * @return 1 if it seems to be the last slice
1926 static int slice_end(AVCodecContext
*avctx
, AVFrame
*pict
)
1928 Mpeg1Context
*s1
= avctx
->priv_data
;
1929 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1931 if (!s1
->mpeg_enc_ctx_allocated
|| !s
->current_picture_ptr
)
1934 if (s
->avctx
->hwaccel
) {
1935 if (s
->avctx
->hwaccel
->end_frame(s
->avctx
) < 0)
1936 av_log(avctx
, AV_LOG_ERROR
, "hardware accelerator failed to decode picture\n");
1939 if(CONFIG_MPEG_XVMC_DECODER
&& s
->avctx
->xvmc_acceleration
)
1940 ff_xvmc_field_end(s
);
1942 /* end of slice reached */
1943 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s
->first_field
) {
1946 s
->current_picture_ptr
->qscale_type
= FF_QSCALE_TYPE_MPEG2
;
1952 if (s
->pict_type
== FF_B_TYPE
|| s
->low_delay
) {
1953 *pict
= *(AVFrame
*)s
->current_picture_ptr
;
1954 ff_print_debug_info(s
, pict
);
1956 s
->picture_number
++;
1957 /* latency of 1 frame for I- and P-frames */
1958 /* XXX: use another variable than picture_number */
1959 if (s
->last_picture_ptr
!= NULL
) {
1960 *pict
= *(AVFrame
*)s
->last_picture_ptr
;
1961 ff_print_debug_info(s
, pict
);
1971 static int mpeg1_decode_sequence(AVCodecContext
*avctx
,
1972 const uint8_t *buf
, int buf_size
)
1974 Mpeg1Context
*s1
= avctx
->priv_data
;
1975 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1979 init_get_bits(&s
->gb
, buf
, buf_size
*8);
1981 width
= get_bits(&s
->gb
, 12);
1982 height
= get_bits(&s
->gb
, 12);
1983 if (width
<= 0 || height
<= 0)
1985 s
->aspect_ratio_info
= get_bits(&s
->gb
, 4);
1986 if (s
->aspect_ratio_info
== 0) {
1987 av_log(avctx
, AV_LOG_ERROR
, "aspect ratio has forbidden 0 value\n");
1988 if (avctx
->error_recognition
>= FF_ER_COMPLIANT
)
1991 s
->frame_rate_index
= get_bits(&s
->gb
, 4);
1992 if (s
->frame_rate_index
== 0 || s
->frame_rate_index
> 13)
1994 s
->bit_rate
= get_bits(&s
->gb
, 18) * 400;
1995 if (get_bits1(&s
->gb
) == 0) /* marker */
2000 s
->avctx
->rc_buffer_size
= get_bits(&s
->gb
, 10) * 1024*16;
2001 skip_bits(&s
->gb
, 1);
2004 if (get_bits1(&s
->gb
)) {
2005 load_matrix(s
, s
->chroma_intra_matrix
, s
->intra_matrix
, 1);
2008 j
= s
->dsp
.idct_permutation
[i
];
2009 v
= ff_mpeg1_default_intra_matrix
[i
];
2010 s
->intra_matrix
[j
] = v
;
2011 s
->chroma_intra_matrix
[j
] = v
;
2014 if (get_bits1(&s
->gb
)) {
2015 load_matrix(s
, s
->chroma_inter_matrix
, s
->inter_matrix
, 0);
2018 int j
= s
->dsp
.idct_permutation
[i
];
2019 v
= ff_mpeg1_default_non_intra_matrix
[i
];
2020 s
->inter_matrix
[j
] = v
;
2021 s
->chroma_inter_matrix
[j
] = v
;
2025 if(show_bits(&s
->gb
, 23) != 0){
2026 av_log(s
->avctx
, AV_LOG_ERROR
, "sequence header damaged\n");
2030 /* we set MPEG-2 parameters so that it emulates MPEG-1 */
2031 s
->progressive_sequence
= 1;
2032 s
->progressive_frame
= 1;
2033 s
->picture_structure
= PICT_FRAME
;
2034 s
->frame_pred_frame_dct
= 1;
2035 s
->chroma_format
= 1;
2036 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG1VIDEO
;
2037 avctx
->sub_id
= 1; /* indicates MPEG-1 */
2038 s
->out_format
= FMT_MPEG1
;
2039 s
->swap_uv
= 0;//AFAIK VCR2 does not have SEQ_HEADER
2040 if(s
->flags
& CODEC_FLAG_LOW_DELAY
) s
->low_delay
=1;
2042 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
2043 av_log(s
->avctx
, AV_LOG_DEBUG
, "vbv buffer: %d, bitrate:%d\n",
2044 s
->avctx
->rc_buffer_size
, s
->bit_rate
);
2049 static int vcr2_init_sequence(AVCodecContext
*avctx
)
2051 Mpeg1Context
*s1
= avctx
->priv_data
;
2052 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
2055 /* start new MPEG-1 context decoding */
2056 s
->out_format
= FMT_MPEG1
;
2057 if (s1
->mpeg_enc_ctx_allocated
) {
2060 s
->width
= avctx
->coded_width
;
2061 s
->height
= avctx
->coded_height
;
2062 avctx
->has_b_frames
= 0; //true?
2065 avctx
->pix_fmt
= mpeg_get_pixelformat(avctx
);
2066 avctx
->hwaccel
= ff_find_hwaccel(avctx
->codec
->id
, avctx
->pix_fmt
);
2068 if( avctx
->pix_fmt
== PIX_FMT_XVMC_MPEG2_IDCT
|| avctx
->hwaccel
||
2069 s
->avctx
->codec
->capabilities
&CODEC_CAP_HWACCEL_VDPAU
)
2070 if( avctx
->idct_algo
== FF_IDCT_AUTO
)
2071 avctx
->idct_algo
= FF_IDCT_SIMPLE
;
2073 if (MPV_common_init(s
) < 0)
2075 exchange_uv(s
);//common init reset pblocks, so we swap them here
2076 s
->swap_uv
= 1;// in case of xvmc we need to swap uv for each MB
2077 s1
->mpeg_enc_ctx_allocated
= 1;
2080 int j
= s
->dsp
.idct_permutation
[i
];
2081 v
= ff_mpeg1_default_intra_matrix
[i
];
2082 s
->intra_matrix
[j
] = v
;
2083 s
->chroma_intra_matrix
[j
] = v
;
2085 v
= ff_mpeg1_default_non_intra_matrix
[i
];
2086 s
->inter_matrix
[j
] = v
;
2087 s
->chroma_inter_matrix
[j
] = v
;
2090 s
->progressive_sequence
= 1;
2091 s
->progressive_frame
= 1;
2092 s
->picture_structure
= PICT_FRAME
;
2093 s
->frame_pred_frame_dct
= 1;
2094 s
->chroma_format
= 1;
2095 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG2VIDEO
;
2096 avctx
->sub_id
= 2; /* indicates MPEG-2 */
2097 s1
->save_width
= s
->width
;
2098 s1
->save_height
= s
->height
;
2099 s1
->save_progressive_seq
= s
->progressive_sequence
;
2104 static void mpeg_decode_user_data(AVCodecContext
*avctx
,
2105 const uint8_t *p
, int buf_size
)
2107 const uint8_t *buf_end
= p
+buf_size
;
2109 /* we parse the DTG active format information */
2110 if (buf_end
- p
>= 5 &&
2111 p
[0] == 'D' && p
[1] == 'T' && p
[2] == 'G' && p
[3] == '1') {
2119 if (buf_end
- p
< 1)
2121 avctx
->dtg_active_format
= p
[0] & 0x0f;
2126 static void mpeg_decode_gop(AVCodecContext
*avctx
,
2127 const uint8_t *buf
, int buf_size
){
2128 Mpeg1Context
*s1
= avctx
->priv_data
;
2129 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
2131 int drop_frame_flag
;
2132 int time_code_hours
, time_code_minutes
;
2133 int time_code_seconds
, time_code_pictures
;
2136 init_get_bits(&s
->gb
, buf
, buf_size
*8);
2138 drop_frame_flag
= get_bits1(&s
->gb
);
2140 time_code_hours
=get_bits(&s
->gb
,5);
2141 time_code_minutes
= get_bits(&s
->gb
,6);
2142 skip_bits1(&s
->gb
);//marker bit
2143 time_code_seconds
= get_bits(&s
->gb
,6);
2144 time_code_pictures
= get_bits(&s
->gb
,6);
2146 s
->closed_gop
= get_bits1(&s
->gb
);
2147 /*broken_link indicate that after editing the
2148 reference frames of the first B-Frames after GOP I-Frame
2149 are missing (open gop)*/
2150 broken_link
= get_bits1(&s
->gb
);
2152 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
2153 av_log(s
->avctx
, AV_LOG_DEBUG
, "GOP (%2d:%02d:%02d.[%02d]) closed_gop=%d broken_link=%d\n",
2154 time_code_hours
, time_code_minutes
, time_code_seconds
,
2155 time_code_pictures
, s
->closed_gop
, broken_link
);
2158 * Finds the end of the current frame in the bitstream.
2159 * @return the position of the first byte of the next frame, or -1
2161 int ff_mpeg1_find_frame_end(ParseContext
*pc
, const uint8_t *buf
, int buf_size
, AVCodecParserContext
*s
)
2164 uint32_t state
= pc
->state
;
2166 /* EOF considered as end of frame */
2171 0 frame start -> 1/4
2172 1 first_SEQEXT -> 0/2
2173 2 first field start -> 3/0
2174 3 second_SEQEXT -> 2/0
2178 for(i
=0; i
<buf_size
; i
++){
2179 assert(pc
->frame_start_found
>=0 && pc
->frame_start_found
<=4);
2180 if(pc
->frame_start_found
&1){
2181 if(state
== EXT_START_CODE
&& (buf
[i
]&0xF0) != 0x80)
2182 pc
->frame_start_found
--;
2183 else if(state
== EXT_START_CODE
+2){
2184 if((buf
[i
]&3) == 3) pc
->frame_start_found
= 0;
2185 else pc
->frame_start_found
= (pc
->frame_start_found
+1)&3;
2189 i
= ff_find_start_code(buf
+i
, buf
+buf_size
, &state
) - buf
- 1;
2190 if(pc
->frame_start_found
==0 && state
>= SLICE_MIN_START_CODE
&& state
<= SLICE_MAX_START_CODE
){
2192 pc
->frame_start_found
=4;
2194 if(state
== SEQ_END_CODE
){
2198 if(pc
->frame_start_found
==2 && state
== SEQ_START_CODE
)
2199 pc
->frame_start_found
= 0;
2200 if(pc
->frame_start_found
<4 && state
== EXT_START_CODE
)
2201 pc
->frame_start_found
++;
2202 if(pc
->frame_start_found
== 4 && (state
&0xFFFFFF00) == 0x100){
2203 if(state
< SLICE_MIN_START_CODE
|| state
> SLICE_MAX_START_CODE
){
2204 pc
->frame_start_found
=0;
2209 if(pc
->frame_start_found
== 0 && s
&& state
== PICTURE_START_CODE
){
2210 ff_fetch_timestamp(s
, i
-3, 1);
2215 return END_NOT_FOUND
;
2218 static int decode_chunks(AVCodecContext
*avctx
,
2219 AVFrame
*picture
, int *data_size
,
2220 const uint8_t *buf
, int buf_size
);
2222 /* handle buffering and image synchronisation */
2223 static int mpeg_decode_frame(AVCodecContext
*avctx
,
2224 void *data
, int *data_size
,
2227 const uint8_t *buf
= avpkt
->data
;
2228 int buf_size
= avpkt
->size
;
2229 Mpeg1Context
*s
= avctx
->priv_data
;
2230 AVFrame
*picture
= data
;
2231 MpegEncContext
*s2
= &s
->mpeg_enc_ctx
;
2232 dprintf(avctx
, "fill_buffer\n");
2234 if (buf_size
== 0 || (buf_size
== 4 && AV_RB32(buf
) == SEQ_END_CODE
)) {
2235 /* special case for last picture */
2236 if (s2
->low_delay
==0 && s2
->next_picture_ptr
) {
2237 *picture
= *(AVFrame
*)s2
->next_picture_ptr
;
2238 s2
->next_picture_ptr
= NULL
;
2240 *data_size
= sizeof(AVFrame
);
2245 if(s2
->flags
&CODEC_FLAG_TRUNCATED
){
2246 int next
= ff_mpeg1_find_frame_end(&s2
->parse_context
, buf
, buf_size
, NULL
);
2248 if( ff_combine_frame(&s2
->parse_context
, next
, (const uint8_t **)&buf
, &buf_size
) < 0 )
2253 if (s
->repeat_field
% 2 == 1) {
2255 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2256 // s2->picture_number, s->repeat_field);
2257 if (avctx
->flags
& CODEC_FLAG_REPEAT_FIELD
) {
2258 *data_size
= sizeof(AVPicture
);
2264 if(s
->mpeg_enc_ctx_allocated
==0 && avctx
->codec_tag
== AV_RL32("VCR2"))
2265 vcr2_init_sequence(avctx
);
2269 if(avctx
->extradata
&& !avctx
->frame_number
)
2270 decode_chunks(avctx
, picture
, data_size
, avctx
->extradata
, avctx
->extradata_size
);
2272 return decode_chunks(avctx
, picture
, data_size
, buf
, buf_size
);
2275 static int decode_chunks(AVCodecContext
*avctx
,
2276 AVFrame
*picture
, int *data_size
,
2277 const uint8_t *buf
, int buf_size
)
2279 Mpeg1Context
*s
= avctx
->priv_data
;
2280 MpegEncContext
*s2
= &s
->mpeg_enc_ctx
;
2281 const uint8_t *buf_ptr
= buf
;
2282 const uint8_t *buf_end
= buf
+ buf_size
;
2283 int ret
, input_size
;
2287 /* find next start code */
2288 uint32_t start_code
= -1;
2289 buf_ptr
= ff_find_start_code(buf_ptr
,buf_end
, &start_code
);
2290 if (start_code
> 0x1ff){
2291 if(s2
->pict_type
!= FF_B_TYPE
|| avctx
->skip_frame
<= AVDISCARD_DEFAULT
){
2292 if(avctx
->thread_count
> 1){
2295 avctx
->execute(avctx
, slice_decode_thread
, &s2
->thread_context
[0], NULL
, s
->slice_count
, sizeof(void*));
2296 for(i
=0; i
<s
->slice_count
; i
++)
2297 s2
->error_count
+= s2
->thread_context
[i
]->error_count
;
2300 if (CONFIG_MPEG_VDPAU_DECODER
&& avctx
->codec
->capabilities
&CODEC_CAP_HWACCEL_VDPAU
)
2301 ff_vdpau_mpeg_picture_complete(s2
, buf
, buf_size
, s
->slice_count
);
2303 if (slice_end(avctx
, picture
)) {
2304 if(s2
->last_picture_ptr
|| s2
->low_delay
) //FIXME merge with the stuff in mpeg_decode_slice
2305 *data_size
= sizeof(AVPicture
);
2309 return FFMAX(0, buf_ptr
- buf
- s2
->parse_context
.last_index
);
2312 input_size
= buf_end
- buf_ptr
;
2314 if(avctx
->debug
& FF_DEBUG_STARTCODE
){
2315 av_log(avctx
, AV_LOG_DEBUG
, "%3X at %td left %d\n", start_code
, buf_ptr
-buf
, input_size
);
2318 /* prepare data for next start code */
2319 switch(start_code
) {
2320 case SEQ_START_CODE
:
2322 mpeg1_decode_sequence(avctx
, buf_ptr
,
2326 av_log(avctx
, AV_LOG_ERROR
, "ignoring SEQ_START_CODE after %X\n", last_code
);
2330 case PICTURE_START_CODE
:
2331 if(last_code
== 0 || last_code
== SLICE_MIN_START_CODE
){
2332 if(mpeg_decode_postinit(avctx
) < 0){
2333 av_log(avctx
, AV_LOG_ERROR
, "mpeg_decode_postinit() failure\n");
2337 /* we have a complete image: we try to decompress it */
2338 if(mpeg1_decode_picture(avctx
,
2339 buf_ptr
, input_size
) < 0)
2341 s2
->first_slice
= 1;
2342 last_code
= PICTURE_START_CODE
;
2344 av_log(avctx
, AV_LOG_ERROR
, "ignoring pic after %X\n", last_code
);
2347 case EXT_START_CODE
:
2348 init_get_bits(&s2
->gb
, buf_ptr
, input_size
*8);
2350 switch(get_bits(&s2
->gb
, 4)) {
2353 mpeg_decode_sequence_extension(s
);
2355 av_log(avctx
, AV_LOG_ERROR
, "ignoring seq ext after %X\n", last_code
);
2359 mpeg_decode_sequence_display_extension(s
);
2362 mpeg_decode_quant_matrix_extension(s2
);
2365 mpeg_decode_picture_display_extension(s
);
2368 if(last_code
== PICTURE_START_CODE
){
2369 mpeg_decode_picture_coding_extension(s
);
2371 av_log(avctx
, AV_LOG_ERROR
, "ignoring pic cod ext after %X\n", last_code
);
2376 case USER_START_CODE
:
2377 mpeg_decode_user_data(avctx
,
2378 buf_ptr
, input_size
);
2380 case GOP_START_CODE
:
2383 mpeg_decode_gop(avctx
,
2384 buf_ptr
, input_size
);
2387 av_log(avctx
, AV_LOG_ERROR
, "ignoring GOP_START_CODE after %X\n", last_code
);
2391 if (start_code
>= SLICE_MIN_START_CODE
&&
2392 start_code
<= SLICE_MAX_START_CODE
&& last_code
!=0) {
2393 const int field_pic
= s2
->picture_structure
!= PICT_FRAME
;
2394 int mb_y
= (start_code
- SLICE_MIN_START_CODE
) << field_pic
;
2395 last_code
= SLICE_MIN_START_CODE
;
2397 if(s2
->picture_structure
== PICT_BOTTOM_FIELD
)
2400 if (mb_y
>= s2
->mb_height
){
2401 av_log(s2
->avctx
, AV_LOG_ERROR
, "slice below image (%d >= %d)\n", mb_y
, s2
->mb_height
);
2405 if(s2
->last_picture_ptr
==NULL
){
2406 /* Skip B-frames if we do not have reference frames and gop is not closed */
2407 if(s2
->pict_type
==FF_B_TYPE
){
2412 if(s2
->pict_type
==FF_I_TYPE
)
2414 if(s2
->next_picture_ptr
==NULL
){
2415 /* Skip P-frames if we do not have a reference frame or we have an invalid header. */
2416 if(s2
->pict_type
==FF_P_TYPE
&& !s
->sync
) break;
2418 /* Skip B-frames if we are in a hurry. */
2419 if(avctx
->hurry_up
&& s2
->pict_type
==FF_B_TYPE
) break;
2420 if( (avctx
->skip_frame
>= AVDISCARD_NONREF
&& s2
->pict_type
==FF_B_TYPE
)
2421 ||(avctx
->skip_frame
>= AVDISCARD_NONKEY
&& s2
->pict_type
!=FF_I_TYPE
)
2422 || avctx
->skip_frame
>= AVDISCARD_ALL
)
2424 /* Skip everything if we are in a hurry>=5. */
2425 if(avctx
->hurry_up
>=5) break;
2427 if (!s
->mpeg_enc_ctx_allocated
) break;
2429 if(s2
->codec_id
== CODEC_ID_MPEG2VIDEO
){
2430 if(mb_y
< avctx
->skip_top
|| mb_y
>= s2
->mb_height
- avctx
->skip_bottom
)
2435 av_log(avctx
, AV_LOG_ERROR
, "Missing picture start code\n");
2439 if(s2
->first_slice
){
2441 if(mpeg_field_start(s2
, buf
, buf_size
) < 0)
2444 if(!s2
->current_picture_ptr
){
2445 av_log(avctx
, AV_LOG_ERROR
, "current_picture not initialized\n");
2449 if (avctx
->codec
->capabilities
&CODEC_CAP_HWACCEL_VDPAU
) {
2454 if(avctx
->thread_count
> 1){
2455 int threshold
= (s2
->mb_height
*s
->slice_count
+ avctx
->thread_count
/2) / avctx
->thread_count
;
2456 if(threshold
<= mb_y
){
2457 MpegEncContext
*thread_context
= s2
->thread_context
[s
->slice_count
];
2459 thread_context
->start_mb_y
= mb_y
;
2460 thread_context
->end_mb_y
= s2
->mb_height
;
2462 s2
->thread_context
[s
->slice_count
-1]->end_mb_y
= mb_y
;
2463 ff_update_duplicate_context(thread_context
, s2
);
2465 init_get_bits(&thread_context
->gb
, buf_ptr
, input_size
*8);
2468 buf_ptr
+= 2; //FIXME add minimum number of bytes per slice
2470 ret
= mpeg_decode_slice(s
, mb_y
, &buf_ptr
, input_size
);
2474 if(s2
->resync_mb_x
>=0 && s2
->resync_mb_y
>=0)
2475 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
);
2477 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
);
2486 static void flush(AVCodecContext
*avctx
){
2487 Mpeg1Context
*s
= avctx
->priv_data
;
2491 ff_mpeg_flush(avctx
);
2494 static int mpeg_decode_end(AVCodecContext
*avctx
)
2496 Mpeg1Context
*s
= avctx
->priv_data
;
2498 if (s
->mpeg_enc_ctx_allocated
)
2499 MPV_common_end(&s
->mpeg_enc_ctx
);
2503 AVCodec mpeg1video_decoder
= {
2506 CODEC_ID_MPEG1VIDEO
,
2507 sizeof(Mpeg1Context
),
2512 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2514 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2517 AVCodec mpeg2video_decoder
= {
2520 CODEC_ID_MPEG2VIDEO
,
2521 sizeof(Mpeg1Context
),
2526 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2528 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-2 video"),
2532 AVCodec mpegvideo_decoder
= {
2535 CODEC_ID_MPEG2VIDEO
,
2536 sizeof(Mpeg1Context
),
2541 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2543 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1 video"),
2546 #if CONFIG_MPEG_XVMC_DECODER
2547 static av_cold
int mpeg_mc_decode_init(AVCodecContext
*avctx
){
2548 if( avctx
->thread_count
> 1)
2550 if( !(avctx
->slice_flags
& SLICE_FLAG_CODED_ORDER
) )
2552 if( !(avctx
->slice_flags
& SLICE_FLAG_ALLOW_FIELD
) ){
2553 dprintf(avctx
, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2555 mpeg_decode_init(avctx
);
2557 avctx
->pix_fmt
= PIX_FMT_XVMC_MPEG2_IDCT
;
2558 avctx
->xvmc_acceleration
= 2;//2 - the blocks are packed!
2563 AVCodec mpeg_xvmc_decoder
= {
2566 CODEC_ID_MPEG2VIDEO_XVMC
,
2567 sizeof(Mpeg1Context
),
2568 mpeg_mc_decode_init
,
2572 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_HWACCEL
| CODEC_CAP_DELAY
,
2574 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1/2 video XvMC (X-Video Motion Compensation)"),
2579 #if CONFIG_MPEG_VDPAU_DECODER
2580 AVCodec mpeg_vdpau_decoder
= {
2583 CODEC_ID_MPEG2VIDEO
,
2584 sizeof(Mpeg1Context
),
2589 CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_HWACCEL_VDPAU
| CODEC_CAP_DELAY
,
2591 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1/2 video (VDPAU acceleration)"),
2595 #if CONFIG_MPEG1_VDPAU_DECODER
2596 AVCodec mpeg1_vdpau_decoder
= {
2599 CODEC_ID_MPEG1VIDEO
,
2600 sizeof(Mpeg1Context
),
2605 CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_HWACCEL_VDPAU
| CODEC_CAP_DELAY
,
2607 .long_name
= NULL_IF_CONFIG_SMALL("MPEG-1 video (VDPAU acceleration)"),