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
31 #include "mpegvideo.h"
34 #include "mpeg12data.h"
35 #include "mpeg12decdata.h"
36 #include "bytestream.h"
44 #define MBINCR_VLC_BITS 9
45 #define MB_PAT_VLC_BITS 9
46 #define MB_PTYPE_VLC_BITS 6
47 #define MB_BTYPE_VLC_BITS 6
48 #define TEX_VLC_BITS 9
50 static inline int mpeg1_decode_block_inter(MpegEncContext
*s
,
53 static inline int mpeg1_decode_block_intra(MpegEncContext
*s
,
56 static inline int mpeg1_fast_decode_block_inter(MpegEncContext
*s
, DCTELEM
*block
, int n
);
57 static inline int mpeg2_decode_block_non_intra(MpegEncContext
*s
,
60 static inline int mpeg2_decode_block_intra(MpegEncContext
*s
,
63 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext
*s
, DCTELEM
*block
, int n
);
64 static inline int mpeg2_fast_decode_block_intra(MpegEncContext
*s
, DCTELEM
*block
, int n
);
65 static int mpeg_decode_motion(MpegEncContext
*s
, int fcode
, int pred
);
66 static void exchange_uv(MpegEncContext
*s
);
68 extern int XVMC_field_start(MpegEncContext
*s
, AVCodecContext
*avctx
);
69 extern int XVMC_field_end(MpegEncContext
*s
);
70 extern void XVMC_pack_pblocks(MpegEncContext
*s
,int cbp
);
71 extern void XVMC_init_block(MpegEncContext
*s
);//set s->block
73 static const enum PixelFormat pixfmt_yuv_420
[]= {PIX_FMT_YUV420P
,-1};
74 static const enum PixelFormat pixfmt_yuv_422
[]= {PIX_FMT_YUV422P
,-1};
75 static const enum PixelFormat pixfmt_yuv_444
[]= {PIX_FMT_YUV444P
,-1};
76 static const enum PixelFormat pixfmt_xvmc_mpg2_420
[] = {
77 PIX_FMT_XVMC_MPEG2_IDCT
,
78 PIX_FMT_XVMC_MPEG2_MC
,
81 uint8_t ff_mpeg12_static_rl_table_store
[2][2][2*MAX_RUN
+ MAX_LEVEL
+ 3];
83 static void init_2d_vlc_rl(RLTable
*rl
, int use_static
)
87 init_vlc(&rl
->vlc
, TEX_VLC_BITS
, rl
->n
+ 2,
88 &rl
->table_vlc
[0][1], 4, 2,
89 &rl
->table_vlc
[0][0], 4, 2, use_static
);
92 rl
->rl_vlc
[0]= av_mallocz_static(rl
->vlc
.table_size
*sizeof(RL_VLC_ELEM
));
94 rl
->rl_vlc
[0]= av_malloc(rl
->vlc
.table_size
*sizeof(RL_VLC_ELEM
));
96 for(i
=0; i
<rl
->vlc
.table_size
; i
++){
97 int code
= rl
->vlc
.table
[i
][0];
98 int len
= rl
->vlc
.table
[i
][1];
101 if(len
==0){ // illegal code
104 }else if(len
<0){ //more bits needed
108 if(code
==rl
->n
){ //esc
111 }else if(code
==rl
->n
+1){ //eob
115 run
= rl
->table_run
[code
] + 1;
116 level
= rl
->table_level
[code
];
119 rl
->rl_vlc
[0][i
].len
= len
;
120 rl
->rl_vlc
[0][i
].level
= level
;
121 rl
->rl_vlc
[0][i
].run
= run
;
125 void ff_mpeg12_common_init(MpegEncContext
*s
)
129 s
->c_dc_scale_table
= mpeg2_dc_scale_table
[s
->intra_dc_precision
];
133 void ff_mpeg1_clean_buffers(MpegEncContext
*s
){
134 s
->last_dc
[0] = 1 << (7 + s
->intra_dc_precision
);
135 s
->last_dc
[1] = s
->last_dc
[0];
136 s
->last_dc
[2] = s
->last_dc
[0];
137 memset(s
->last_mv
, 0, sizeof(s
->last_mv
));
141 /******************************************/
144 static VLC dc_lum_vlc
;
145 static VLC dc_chroma_vlc
;
147 static VLC mbincr_vlc
;
148 static VLC mb_ptype_vlc
;
149 static VLC mb_btype_vlc
;
150 static VLC mb_pat_vlc
;
152 static void init_vlcs(void)
159 init_vlc(&dc_lum_vlc
, DC_VLC_BITS
, 12,
160 ff_mpeg12_vlc_dc_lum_bits
, 1, 1,
161 ff_mpeg12_vlc_dc_lum_code
, 2, 2, 1);
162 init_vlc(&dc_chroma_vlc
, DC_VLC_BITS
, 12,
163 ff_mpeg12_vlc_dc_chroma_bits
, 1, 1,
164 ff_mpeg12_vlc_dc_chroma_code
, 2, 2, 1);
165 init_vlc(&mv_vlc
, MV_VLC_BITS
, 17,
166 &ff_mpeg12_mbMotionVectorTable
[0][1], 2, 1,
167 &ff_mpeg12_mbMotionVectorTable
[0][0], 2, 1, 1);
168 init_vlc(&mbincr_vlc
, MBINCR_VLC_BITS
, 36,
169 &ff_mpeg12_mbAddrIncrTable
[0][1], 2, 1,
170 &ff_mpeg12_mbAddrIncrTable
[0][0], 2, 1, 1);
171 init_vlc(&mb_pat_vlc
, MB_PAT_VLC_BITS
, 64,
172 &ff_mpeg12_mbPatTable
[0][1], 2, 1,
173 &ff_mpeg12_mbPatTable
[0][0], 2, 1, 1);
175 init_vlc(&mb_ptype_vlc
, MB_PTYPE_VLC_BITS
, 7,
176 &table_mb_ptype
[0][1], 2, 1,
177 &table_mb_ptype
[0][0], 2, 1, 1);
178 init_vlc(&mb_btype_vlc
, MB_BTYPE_VLC_BITS
, 11,
179 &table_mb_btype
[0][1], 2, 1,
180 &table_mb_btype
[0][0], 2, 1, 1);
181 init_rl(&ff_rl_mpeg1
, ff_mpeg12_static_rl_table_store
[0]);
182 init_rl(&ff_rl_mpeg2
, ff_mpeg12_static_rl_table_store
[1]);
184 init_2d_vlc_rl(&ff_rl_mpeg1
, 1);
185 init_2d_vlc_rl(&ff_rl_mpeg2
, 1);
189 static inline int get_dmv(MpegEncContext
*s
)
191 if(get_bits1(&s
->gb
))
192 return 1 - (get_bits1(&s
->gb
) << 1);
197 static inline int get_qscale(MpegEncContext
*s
)
199 int qscale
= get_bits(&s
->gb
, 5);
200 if (s
->q_scale_type
) {
201 return non_linear_qscale
[qscale
];
207 /* motion type (for mpeg2) */
213 static int mpeg_decode_mb(MpegEncContext
*s
,
214 DCTELEM block
[12][64])
216 int i
, j
, k
, cbp
, val
, mb_type
, motion_type
;
217 const int mb_block_count
= 4 + (1<< s
->chroma_format
);
219 dprintf(s
->avctx
, "decode_mb: x=%d y=%d\n", s
->mb_x
, s
->mb_y
);
221 assert(s
->mb_skipped
==0);
223 if (s
->mb_skip_run
-- != 0) {
224 if (s
->pict_type
== P_TYPE
) {
226 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]= MB_TYPE_SKIP
| MB_TYPE_L0
| MB_TYPE_16x16
;
231 mb_type
= s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
- 1];
233 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,
234 if(IS_INTRA(mb_type
))
237 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]=
238 mb_type
| MB_TYPE_SKIP
;
239 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
241 if((s
->mv
[0][0][0]|s
->mv
[0][0][1]|s
->mv
[1][0][0]|s
->mv
[1][0][1])==0)
248 switch(s
->pict_type
) {
251 if (get_bits1(&s
->gb
) == 0) {
252 if (get_bits1(&s
->gb
) == 0){
253 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in I Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
256 mb_type
= MB_TYPE_QUANT
| MB_TYPE_INTRA
;
258 mb_type
= MB_TYPE_INTRA
;
262 mb_type
= get_vlc2(&s
->gb
, mb_ptype_vlc
.table
, MB_PTYPE_VLC_BITS
, 1);
264 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in P Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
267 mb_type
= ptype2mb_type
[ mb_type
];
270 mb_type
= get_vlc2(&s
->gb
, mb_btype_vlc
.table
, MB_BTYPE_VLC_BITS
, 1);
272 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid mb type in B Frame at %d %d\n", s
->mb_x
, s
->mb_y
);
275 mb_type
= btype2mb_type
[ mb_type
];
278 dprintf(s
->avctx
, "mb_type=%x\n", mb_type
);
279 // motion_type = 0; /* avoid warning */
280 if (IS_INTRA(mb_type
)) {
281 s
->dsp
.clear_blocks(s
->block
[0]);
283 if(!s
->chroma_y_shift
){
284 s
->dsp
.clear_blocks(s
->block
[6]);
287 /* compute dct type */
288 if (s
->picture_structure
== PICT_FRAME
&& //FIXME add a interlaced_dct coded var?
289 !s
->frame_pred_frame_dct
) {
290 s
->interlaced_dct
= get_bits1(&s
->gb
);
293 if (IS_QUANT(mb_type
))
294 s
->qscale
= get_qscale(s
);
296 if (s
->concealment_motion_vectors
) {
297 /* just parse them */
298 if (s
->picture_structure
!= PICT_FRAME
)
299 skip_bits1(&s
->gb
); /* field select */
301 s
->mv
[0][0][0]= s
->last_mv
[0][0][0]= s
->last_mv
[0][1][0] =
302 mpeg_decode_motion(s
, s
->mpeg_f_code
[0][0], s
->last_mv
[0][0][0]);
303 s
->mv
[0][0][1]= s
->last_mv
[0][0][1]= s
->last_mv
[0][1][1] =
304 mpeg_decode_motion(s
, s
->mpeg_f_code
[0][1], s
->last_mv
[0][0][1]);
306 skip_bits1(&s
->gb
); /* marker */
308 memset(s
->last_mv
, 0, sizeof(s
->last_mv
)); /* reset mv prediction */
311 //one 1 we memcpy blocks in xvmcvideo
312 if(s
->avctx
->xvmc_acceleration
> 1){
313 XVMC_pack_pblocks(s
,-1);//inter are always full blocks
320 if (s
->codec_id
== CODEC_ID_MPEG2VIDEO
) {
321 if(s
->flags2
& CODEC_FLAG2_FAST
){
323 mpeg2_fast_decode_block_intra(s
, s
->pblocks
[i
], i
);
326 for(i
=0;i
<mb_block_count
;i
++) {
327 if (mpeg2_decode_block_intra(s
, s
->pblocks
[i
], i
) < 0)
333 if (mpeg1_decode_block_intra(s
, s
->pblocks
[i
], i
) < 0)
338 if (mb_type
& MB_TYPE_ZERO_MV
){
339 assert(mb_type
& MB_TYPE_CBP
);
341 s
->mv_dir
= MV_DIR_FORWARD
;
342 if(s
->picture_structure
== PICT_FRAME
){
343 if(!s
->frame_pred_frame_dct
)
344 s
->interlaced_dct
= get_bits1(&s
->gb
);
345 s
->mv_type
= MV_TYPE_16X16
;
347 s
->mv_type
= MV_TYPE_FIELD
;
348 mb_type
|= MB_TYPE_INTERLACED
;
349 s
->field_select
[0][0]= s
->picture_structure
- 1;
352 if (IS_QUANT(mb_type
))
353 s
->qscale
= get_qscale(s
);
355 s
->last_mv
[0][0][0] = 0;
356 s
->last_mv
[0][0][1] = 0;
357 s
->last_mv
[0][1][0] = 0;
358 s
->last_mv
[0][1][1] = 0;
362 assert(mb_type
& MB_TYPE_L0L1
);
363 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
364 /* get additional motion vector type */
365 if (s
->frame_pred_frame_dct
)
366 motion_type
= MT_FRAME
;
368 motion_type
= get_bits(&s
->gb
, 2);
369 if (s
->picture_structure
== PICT_FRAME
&& HAS_CBP(mb_type
))
370 s
->interlaced_dct
= get_bits1(&s
->gb
);
373 if (IS_QUANT(mb_type
))
374 s
->qscale
= get_qscale(s
);
377 s
->mv_dir
= (mb_type
>>13)&3;
378 dprintf(s
->avctx
, "motion_type=%d\n", motion_type
);
379 switch(motion_type
) {
380 case MT_FRAME
: /* or MT_16X8 */
381 if (s
->picture_structure
== PICT_FRAME
) {
382 mb_type
|= MB_TYPE_16x16
;
383 s
->mv_type
= MV_TYPE_16X16
;
385 if (USES_LIST(mb_type
, i
)) {
387 s
->mv
[i
][0][0]= s
->last_mv
[i
][0][0]= s
->last_mv
[i
][1][0] =
388 mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0], s
->last_mv
[i
][0][0]);
389 s
->mv
[i
][0][1]= s
->last_mv
[i
][0][1]= s
->last_mv
[i
][1][1] =
390 mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1], s
->last_mv
[i
][0][1]);
391 /* full_pel: only for mpeg1 */
393 s
->mv
[i
][0][0] <<= 1;
394 s
->mv
[i
][0][1] <<= 1;
399 mb_type
|= MB_TYPE_16x8
| MB_TYPE_INTERLACED
;
400 s
->mv_type
= MV_TYPE_16X8
;
402 if (USES_LIST(mb_type
, i
)) {
405 s
->field_select
[i
][j
] = get_bits1(&s
->gb
);
407 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][k
],
408 s
->last_mv
[i
][j
][k
]);
409 s
->last_mv
[i
][j
][k
] = val
;
410 s
->mv
[i
][j
][k
] = val
;
418 s
->mv_type
= MV_TYPE_FIELD
;
419 if (s
->picture_structure
== PICT_FRAME
) {
420 mb_type
|= MB_TYPE_16x8
| MB_TYPE_INTERLACED
;
422 if (USES_LIST(mb_type
, i
)) {
424 s
->field_select
[i
][j
] = get_bits1(&s
->gb
);
425 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0],
426 s
->last_mv
[i
][j
][0]);
427 s
->last_mv
[i
][j
][0] = val
;
428 s
->mv
[i
][j
][0] = val
;
429 dprintf(s
->avctx
, "fmx=%d\n", val
);
430 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1],
431 s
->last_mv
[i
][j
][1] >> 1);
432 s
->last_mv
[i
][j
][1] = val
<< 1;
433 s
->mv
[i
][j
][1] = val
;
434 dprintf(s
->avctx
, "fmy=%d\n", val
);
439 mb_type
|= MB_TYPE_16x16
| MB_TYPE_INTERLACED
;
441 if (USES_LIST(mb_type
, i
)) {
442 s
->field_select
[i
][0] = get_bits1(&s
->gb
);
444 val
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][k
],
445 s
->last_mv
[i
][0][k
]);
446 s
->last_mv
[i
][0][k
] = val
;
447 s
->last_mv
[i
][1][k
] = val
;
448 s
->mv
[i
][0][k
] = val
;
455 s
->mv_type
= MV_TYPE_DMV
;
457 if (USES_LIST(mb_type
, i
)) {
458 int dmx
, dmy
, mx
, my
, m
;
459 mx
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][0],
460 s
->last_mv
[i
][0][0]);
461 s
->last_mv
[i
][0][0] = mx
;
462 s
->last_mv
[i
][1][0] = mx
;
464 my
= mpeg_decode_motion(s
, s
->mpeg_f_code
[i
][1],
465 s
->last_mv
[i
][0][1] >> 1);
469 s
->last_mv
[i
][0][1] = my
<<1;
470 s
->last_mv
[i
][1][1] = my
<<1;
474 s
->mv
[i
][1][0] = mx
;//not used
475 s
->mv
[i
][1][1] = my
;//not used
477 if (s
->picture_structure
== PICT_FRAME
) {
478 mb_type
|= MB_TYPE_16x16
| MB_TYPE_INTERLACED
;
480 //m = 1 + 2 * s->top_field_first;
481 m
= s
->top_field_first
? 1 : 3;
483 /* top -> top pred */
484 s
->mv
[i
][2][0] = ((mx
* m
+ (mx
> 0)) >> 1) + dmx
;
485 s
->mv
[i
][2][1] = ((my
* m
+ (my
> 0)) >> 1) + dmy
- 1;
487 s
->mv
[i
][3][0] = ((mx
* m
+ (mx
> 0)) >> 1) + dmx
;
488 s
->mv
[i
][3][1] = ((my
* m
+ (my
> 0)) >> 1) + dmy
+ 1;
490 mb_type
|= MB_TYPE_16x16
;
492 s
->mv
[i
][2][0] = ((mx
+ (mx
> 0)) >> 1) + dmx
;
493 s
->mv
[i
][2][1] = ((my
+ (my
> 0)) >> 1) + dmy
;
494 if(s
->picture_structure
== PICT_TOP_FIELD
)
503 av_log(s
->avctx
, AV_LOG_ERROR
, "00 motion_type at %d %d\n", s
->mb_x
, s
->mb_y
);
509 if (HAS_CBP(mb_type
)) {
510 s
->dsp
.clear_blocks(s
->block
[0]);
512 cbp
= get_vlc2(&s
->gb
, mb_pat_vlc
.table
, MB_PAT_VLC_BITS
, 1);
513 if(mb_block_count
> 6){
514 cbp
<<= mb_block_count
-6;
515 cbp
|= get_bits(&s
->gb
, mb_block_count
-6);
516 s
->dsp
.clear_blocks(s
->block
[6]);
519 av_log(s
->avctx
, AV_LOG_ERROR
, "invalid cbp at %d %d\n", s
->mb_x
, s
->mb_y
);
524 //on 1 we memcpy blocks in xvmcvideo
525 if(s
->avctx
->xvmc_acceleration
> 1){
526 XVMC_pack_pblocks(s
,cbp
);
533 if (s
->codec_id
== CODEC_ID_MPEG2VIDEO
) {
534 if(s
->flags2
& CODEC_FLAG2_FAST
){
537 mpeg2_fast_decode_block_non_intra(s
, s
->pblocks
[i
], i
);
539 s
->block_last_index
[i
] = -1;
544 cbp
<<= 12-mb_block_count
;
546 for(i
=0;i
<mb_block_count
;i
++) {
547 if ( cbp
& (1<<11) ) {
548 if (mpeg2_decode_block_non_intra(s
, s
->pblocks
[i
], i
) < 0)
551 s
->block_last_index
[i
] = -1;
557 if(s
->flags2
& CODEC_FLAG2_FAST
){
560 mpeg1_fast_decode_block_inter(s
, s
->pblocks
[i
], i
);
562 s
->block_last_index
[i
] = -1;
569 if (mpeg1_decode_block_inter(s
, s
->pblocks
[i
], i
) < 0)
572 s
->block_last_index
[i
] = -1;
580 s
->block_last_index
[i
] = -1;
584 s
->current_picture
.mb_type
[ s
->mb_x
+ s
->mb_y
*s
->mb_stride
]= mb_type
;
589 /* as h263, but only 17 codes */
590 static int mpeg_decode_motion(MpegEncContext
*s
, int fcode
, int pred
)
592 int code
, sign
, val
, l
, shift
;
594 code
= get_vlc2(&s
->gb
, mv_vlc
.table
, MV_VLC_BITS
, 2);
602 sign
= get_bits1(&s
->gb
);
606 val
= (val
- 1) << shift
;
607 val
|= get_bits(&s
->gb
, shift
);
614 /* modulo decoding */
615 l
= INT_BIT
- 5 - shift
;
620 static inline int decode_dc(GetBitContext
*gb
, int component
)
624 if (component
== 0) {
625 code
= get_vlc2(gb
, dc_lum_vlc
.table
, DC_VLC_BITS
, 2);
627 code
= get_vlc2(gb
, dc_chroma_vlc
.table
, DC_VLC_BITS
, 2);
630 av_log(NULL
, AV_LOG_ERROR
, "invalid dc code at\n");
636 diff
= get_xbits(gb
, code
);
641 static inline int mpeg1_decode_block_intra(MpegEncContext
*s
,
645 int level
, dc
, diff
, i
, j
, run
;
647 RLTable
*rl
= &ff_rl_mpeg1
;
648 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
649 const uint16_t *quant_matrix
= s
->intra_matrix
;
650 const int qscale
= s
->qscale
;
653 component
= (n
<= 3 ? 0 : n
- 4 + 1);
654 diff
= decode_dc(&s
->gb
, component
);
657 dc
= s
->last_dc
[component
];
659 s
->last_dc
[component
] = dc
;
661 dprintf(s
->avctx
, "dc=%d diff=%d\n", dc
, diff
);
664 OPEN_READER(re
, &s
->gb
);
665 /* now quantify & encode AC coefs */
667 UPDATE_CACHE(re
, &s
->gb
);
668 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
672 } else if(level
!= 0) {
675 level
= (level
*qscale
*quant_matrix
[j
])>>4;
677 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
678 LAST_SKIP_BITS(re
, &s
->gb
, 1);
681 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
682 UPDATE_CACHE(re
, &s
->gb
);
683 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
685 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; LAST_SKIP_BITS(re
, &s
->gb
, 8);
686 } else if (level
== 0) {
687 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; LAST_SKIP_BITS(re
, &s
->gb
, 8);
693 level
= (level
*qscale
*quant_matrix
[j
])>>4;
697 level
= (level
*qscale
*quant_matrix
[j
])>>4;
702 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
708 CLOSE_READER(re
, &s
->gb
);
710 s
->block_last_index
[n
] = i
;
714 static inline int mpeg1_decode_block_inter(MpegEncContext
*s
,
718 int level
, i
, j
, run
;
719 RLTable
*rl
= &ff_rl_mpeg1
;
720 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
721 const uint16_t *quant_matrix
= s
->inter_matrix
;
722 const int qscale
= s
->qscale
;
725 OPEN_READER(re
, &s
->gb
);
727 /* special case for the first coef. no need to add a second vlc table */
728 UPDATE_CACHE(re
, &s
->gb
);
729 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
730 level
= (3*qscale
*quant_matrix
[0])>>5;
732 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
736 SKIP_BITS(re
, &s
->gb
, 2);
737 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
740 #if MIN_CACHE_BITS < 19
741 UPDATE_CACHE(re
, &s
->gb
);
743 /* now quantify & encode AC coefs */
745 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
750 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
752 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
753 SKIP_BITS(re
, &s
->gb
, 1);
756 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
757 UPDATE_CACHE(re
, &s
->gb
);
758 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
760 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; SKIP_BITS(re
, &s
->gb
, 8);
761 } else if (level
== 0) {
762 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; SKIP_BITS(re
, &s
->gb
, 8);
768 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
772 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
777 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
782 #if MIN_CACHE_BITS < 19
783 UPDATE_CACHE(re
, &s
->gb
);
785 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
787 #if MIN_CACHE_BITS >= 19
788 UPDATE_CACHE(re
, &s
->gb
);
792 LAST_SKIP_BITS(re
, &s
->gb
, 2);
793 CLOSE_READER(re
, &s
->gb
);
795 s
->block_last_index
[n
] = i
;
799 static inline int mpeg1_fast_decode_block_inter(MpegEncContext
*s
, DCTELEM
*block
, int n
)
801 int level
, i
, j
, run
;
802 RLTable
*rl
= &ff_rl_mpeg1
;
803 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
804 const int qscale
= s
->qscale
;
807 OPEN_READER(re
, &s
->gb
);
809 /* special case for the first coef. no need to add a second vlc table */
810 UPDATE_CACHE(re
, &s
->gb
);
811 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
812 level
= (3*qscale
)>>1;
814 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
818 SKIP_BITS(re
, &s
->gb
, 2);
819 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
822 #if MIN_CACHE_BITS < 19
823 UPDATE_CACHE(re
, &s
->gb
);
826 /* now quantify & encode AC coefs */
828 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
833 level
= ((level
*2+1)*qscale
)>>1;
835 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
836 SKIP_BITS(re
, &s
->gb
, 1);
839 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
840 UPDATE_CACHE(re
, &s
->gb
);
841 level
= SHOW_SBITS(re
, &s
->gb
, 8); SKIP_BITS(re
, &s
->gb
, 8);
843 level
= SHOW_UBITS(re
, &s
->gb
, 8) - 256; SKIP_BITS(re
, &s
->gb
, 8);
844 } else if (level
== 0) {
845 level
= SHOW_UBITS(re
, &s
->gb
, 8) ; SKIP_BITS(re
, &s
->gb
, 8);
851 level
= ((level
*2+1)*qscale
)>>1;
855 level
= ((level
*2+1)*qscale
)>>1;
861 #if MIN_CACHE_BITS < 19
862 UPDATE_CACHE(re
, &s
->gb
);
864 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
866 #if MIN_CACHE_BITS >= 19
867 UPDATE_CACHE(re
, &s
->gb
);
871 LAST_SKIP_BITS(re
, &s
->gb
, 2);
872 CLOSE_READER(re
, &s
->gb
);
874 s
->block_last_index
[n
] = i
;
879 static inline int mpeg2_decode_block_non_intra(MpegEncContext
*s
,
883 int level
, i
, j
, run
;
884 RLTable
*rl
= &ff_rl_mpeg1
;
885 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
886 const uint16_t *quant_matrix
;
887 const int qscale
= s
->qscale
;
893 OPEN_READER(re
, &s
->gb
);
896 quant_matrix
= s
->inter_matrix
;
898 quant_matrix
= s
->chroma_inter_matrix
;
900 /* special case for the first coef. no need to add a second vlc table */
901 UPDATE_CACHE(re
, &s
->gb
);
902 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
903 level
= (3*qscale
*quant_matrix
[0])>>5;
904 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
909 SKIP_BITS(re
, &s
->gb
, 2);
910 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
913 #if MIN_CACHE_BITS < 19
914 UPDATE_CACHE(re
, &s
->gb
);
917 /* now quantify & encode AC coefs */
919 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
924 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
925 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
926 SKIP_BITS(re
, &s
->gb
, 1);
929 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
930 UPDATE_CACHE(re
, &s
->gb
);
931 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
936 level
= ((-level
*2+1)*qscale
*quant_matrix
[j
])>>5;
939 level
= ((level
*2+1)*qscale
*quant_matrix
[j
])>>5;
943 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
949 #if MIN_CACHE_BITS < 19
950 UPDATE_CACHE(re
, &s
->gb
);
952 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
954 #if MIN_CACHE_BITS >= 19
955 UPDATE_CACHE(re
, &s
->gb
);
959 LAST_SKIP_BITS(re
, &s
->gb
, 2);
960 CLOSE_READER(re
, &s
->gb
);
962 block
[63] ^= (mismatch
& 1);
964 s
->block_last_index
[n
] = i
;
968 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext
*s
,
972 int level
, i
, j
, run
;
973 RLTable
*rl
= &ff_rl_mpeg1
;
974 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
975 const int qscale
= s
->qscale
;
976 OPEN_READER(re
, &s
->gb
);
979 /* special case for the first coef. no need to add a second vlc table */
980 UPDATE_CACHE(re
, &s
->gb
);
981 if (((int32_t)GET_CACHE(re
, &s
->gb
)) < 0) {
982 level
= (3*qscale
)>>1;
983 if(GET_CACHE(re
, &s
->gb
)&0x40000000)
987 SKIP_BITS(re
, &s
->gb
, 2);
988 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
991 #if MIN_CACHE_BITS < 19
992 UPDATE_CACHE(re
, &s
->gb
);
995 /* now quantify & encode AC coefs */
997 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
1002 level
= ((level
*2+1)*qscale
)>>1;
1003 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
1004 SKIP_BITS(re
, &s
->gb
, 1);
1007 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
1008 UPDATE_CACHE(re
, &s
->gb
);
1009 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
1014 level
= ((-level
*2+1)*qscale
)>>1;
1017 level
= ((level
*2+1)*qscale
)>>1;
1022 #if MIN_CACHE_BITS < 19
1023 UPDATE_CACHE(re
, &s
->gb
);
1025 if(((int32_t)GET_CACHE(re
, &s
->gb
)) <= (int32_t)0xBFFFFFFF)
1027 #if MIN_CACHE_BITS >=19
1028 UPDATE_CACHE(re
, &s
->gb
);
1032 LAST_SKIP_BITS(re
, &s
->gb
, 2);
1033 CLOSE_READER(re
, &s
->gb
);
1034 s
->block_last_index
[n
] = i
;
1039 static inline int mpeg2_decode_block_intra(MpegEncContext
*s
,
1043 int level
, dc
, diff
, i
, j
, run
;
1046 uint8_t * const scantable
= s
->intra_scantable
.permutated
;
1047 const uint16_t *quant_matrix
;
1048 const int qscale
= s
->qscale
;
1053 quant_matrix
= s
->intra_matrix
;
1056 quant_matrix
= s
->chroma_intra_matrix
;
1057 component
= (n
&1) + 1;
1059 diff
= decode_dc(&s
->gb
, component
);
1062 dc
= s
->last_dc
[component
];
1064 s
->last_dc
[component
] = dc
;
1065 block
[0] = dc
<< (3 - s
->intra_dc_precision
);
1066 dprintf(s
->avctx
, "dc=%d\n", block
[0]);
1067 mismatch
= block
[0] ^ 1;
1069 if (s
->intra_vlc_format
)
1075 OPEN_READER(re
, &s
->gb
);
1076 /* now quantify & encode AC coefs */
1078 UPDATE_CACHE(re
, &s
->gb
);
1079 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
1083 } else if(level
!= 0) {
1086 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1087 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
1088 LAST_SKIP_BITS(re
, &s
->gb
, 1);
1091 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
1092 UPDATE_CACHE(re
, &s
->gb
);
1093 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
1097 level
= (-level
*qscale
*quant_matrix
[j
])>>4;
1100 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1104 av_log(s
->avctx
, AV_LOG_ERROR
, "ac-tex damaged at %d %d\n", s
->mb_x
, s
->mb_y
);
1111 CLOSE_READER(re
, &s
->gb
);
1113 block
[63]^= mismatch
&1;
1115 s
->block_last_index
[n
] = i
;
1119 static inline int mpeg2_fast_decode_block_intra(MpegEncContext
*s
,
1123 int level
, dc
, diff
, j
, run
;
1126 uint8_t * scantable
= s
->intra_scantable
.permutated
;
1127 const uint16_t *quant_matrix
;
1128 const int qscale
= s
->qscale
;
1132 quant_matrix
= s
->intra_matrix
;
1135 quant_matrix
= s
->chroma_intra_matrix
;
1136 component
= (n
&1) + 1;
1138 diff
= decode_dc(&s
->gb
, component
);
1141 dc
= s
->last_dc
[component
];
1143 s
->last_dc
[component
] = dc
;
1144 block
[0] = dc
<< (3 - s
->intra_dc_precision
);
1145 if (s
->intra_vlc_format
)
1151 OPEN_READER(re
, &s
->gb
);
1152 /* now quantify & encode AC coefs */
1154 UPDATE_CACHE(re
, &s
->gb
);
1155 GET_RL_VLC(level
, run
, re
, &s
->gb
, rl
->rl_vlc
[0], TEX_VLC_BITS
, 2, 0);
1159 } else if(level
!= 0) {
1162 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1163 level
= (level
^ SHOW_SBITS(re
, &s
->gb
, 1)) - SHOW_SBITS(re
, &s
->gb
, 1);
1164 LAST_SKIP_BITS(re
, &s
->gb
, 1);
1167 run
= SHOW_UBITS(re
, &s
->gb
, 6)+1; LAST_SKIP_BITS(re
, &s
->gb
, 6);
1168 UPDATE_CACHE(re
, &s
->gb
);
1169 level
= SHOW_SBITS(re
, &s
->gb
, 12); SKIP_BITS(re
, &s
->gb
, 12);
1173 level
= (-level
*qscale
*quant_matrix
[j
])>>4;
1176 level
= (level
*qscale
*quant_matrix
[j
])>>4;
1182 CLOSE_READER(re
, &s
->gb
);
1185 s
->block_last_index
[n
] = scantable
- s
->intra_scantable
.permutated
;
1189 typedef struct Mpeg1Context
{
1190 MpegEncContext mpeg_enc_ctx
;
1191 int mpeg_enc_ctx_allocated
; /* true if decoding context allocated */
1192 int repeat_field
; /* true if we must repeat the field */
1193 AVPanScan pan_scan
; /** some temporary storage for the panscan */
1195 int swap_uv
;//indicate VCR2
1196 int save_aspect_info
;
1197 int save_width
, save_height
;
1198 AVRational frame_rate_ext
; ///< MPEG-2 specific framerate modificator
1202 static int mpeg_decode_init(AVCodecContext
*avctx
)
1204 Mpeg1Context
*s
= avctx
->priv_data
;
1205 MpegEncContext
*s2
= &s
->mpeg_enc_ctx
;
1208 //we need some parmutation to store
1209 //matrixes, until MPV_common_init()
1210 //set the real permutatuon
1212 s2
->dsp
.idct_permutation
[i
]=i
;
1214 MPV_decode_defaults(s2
);
1216 s
->mpeg_enc_ctx
.avctx
= avctx
;
1217 s
->mpeg_enc_ctx
.flags
= avctx
->flags
;
1218 s
->mpeg_enc_ctx
.flags2
= avctx
->flags2
;
1219 ff_mpeg12_common_init(&s
->mpeg_enc_ctx
);
1222 s
->mpeg_enc_ctx_allocated
= 0;
1223 s
->mpeg_enc_ctx
.picture_number
= 0;
1224 s
->repeat_field
= 0;
1225 s
->mpeg_enc_ctx
.codec_id
= avctx
->codec
->id
;
1229 static void quant_matrix_rebuild(uint16_t *matrix
, const uint8_t *old_perm
,
1230 const uint8_t *new_perm
){
1231 uint16_t temp_matrix
[64];
1234 memcpy(temp_matrix
,matrix
,64*sizeof(uint16_t));
1237 matrix
[new_perm
[i
]] = temp_matrix
[old_perm
[i
]];
1241 //Call this function when we know all parameters
1242 //it may be called in different places for mpeg1 and mpeg2
1243 static int mpeg_decode_postinit(AVCodecContext
*avctx
){
1244 Mpeg1Context
*s1
= avctx
->priv_data
;
1245 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1246 uint8_t old_permutation
[64];
1249 (s1
->mpeg_enc_ctx_allocated
== 0)||
1250 avctx
->coded_width
!= s
->width
||
1251 avctx
->coded_height
!= s
->height
||
1252 s1
->save_width
!= s
->width
||
1253 s1
->save_height
!= s
->height
||
1254 s1
->save_aspect_info
!= s
->aspect_ratio_info
||
1258 if (s1
->mpeg_enc_ctx_allocated
) {
1259 ParseContext pc
= s
->parse_context
;
1260 s
->parse_context
.buffer
=0;
1262 s
->parse_context
= pc
;
1265 if( (s
->width
== 0 )||(s
->height
== 0))
1268 avcodec_set_dimensions(avctx
, s
->width
, s
->height
);
1269 avctx
->bit_rate
= s
->bit_rate
;
1270 s1
->save_aspect_info
= s
->aspect_ratio_info
;
1271 s1
->save_width
= s
->width
;
1272 s1
->save_height
= s
->height
;
1274 //low_delay may be forced, in this case we will have B frames
1275 //that behave like P frames
1276 avctx
->has_b_frames
= !(s
->low_delay
);
1278 if(avctx
->sub_id
==1){//s->codec_id==avctx->codec_id==CODEC_ID
1280 avctx
->time_base
.den
= ff_frame_rate_tab
[s
->frame_rate_index
].num
;
1281 avctx
->time_base
.num
= ff_frame_rate_tab
[s
->frame_rate_index
].den
;
1283 avctx
->sample_aspect_ratio
= av_d2q(
1284 1.0/ff_mpeg1_aspect
[s
->aspect_ratio_info
], 255);
1289 &s
->avctx
->time_base
.den
,
1290 &s
->avctx
->time_base
.num
,
1291 ff_frame_rate_tab
[s
->frame_rate_index
].num
* s1
->frame_rate_ext
.num
,
1292 ff_frame_rate_tab
[s
->frame_rate_index
].den
* s1
->frame_rate_ext
.den
,
1295 if(s
->aspect_ratio_info
> 1){
1296 if( (s1
->pan_scan
.width
== 0 )||(s1
->pan_scan
.height
== 0) ){
1297 s
->avctx
->sample_aspect_ratio
=
1299 ff_mpeg2_aspect
[s
->aspect_ratio_info
],
1300 (AVRational
){s
->width
, s
->height
}
1303 s
->avctx
->sample_aspect_ratio
=
1305 ff_mpeg2_aspect
[s
->aspect_ratio_info
],
1306 (AVRational
){s1
->pan_scan
.width
, s1
->pan_scan
.height
}
1310 s
->avctx
->sample_aspect_ratio
=
1311 ff_mpeg2_aspect
[s
->aspect_ratio_info
];
1315 if(avctx
->xvmc_acceleration
){
1316 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_xvmc_mpg2_420
);
1318 if(s
->chroma_format
< 2){
1319 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_yuv_420
);
1321 if(s
->chroma_format
== 2){
1322 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_yuv_422
);
1324 if(s
->chroma_format
> 2){
1325 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_yuv_444
);
1328 //until then pix_fmt may be changed right after codec init
1329 if( avctx
->pix_fmt
== PIX_FMT_XVMC_MPEG2_IDCT
)
1330 if( avctx
->idct_algo
== FF_IDCT_AUTO
)
1331 avctx
->idct_algo
= FF_IDCT_SIMPLE
;
1333 //quantization matrixes 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 if(mpeg_decode_postinit(s
->avctx
) < 0)
1360 init_get_bits(&s
->gb
, buf
, buf_size
*8);
1362 ref
= get_bits(&s
->gb
, 10); /* temporal ref */
1363 s
->pict_type
= get_bits(&s
->gb
, 3);
1364 if(s
->pict_type
== 0 || s
->pict_type
> 3)
1367 vbv_delay
= get_bits(&s
->gb
, 16);
1368 if (s
->pict_type
== P_TYPE
|| s
->pict_type
== B_TYPE
) {
1369 s
->full_pel
[0] = get_bits1(&s
->gb
);
1370 f_code
= get_bits(&s
->gb
, 3);
1371 if (f_code
== 0 && avctx
->error_resilience
>= FF_ER_COMPLIANT
)
1373 s
->mpeg_f_code
[0][0] = f_code
;
1374 s
->mpeg_f_code
[0][1] = f_code
;
1376 if (s
->pict_type
== B_TYPE
) {
1377 s
->full_pel
[1] = get_bits1(&s
->gb
);
1378 f_code
= get_bits(&s
->gb
, 3);
1379 if (f_code
== 0 && avctx
->error_resilience
>= FF_ER_COMPLIANT
)
1381 s
->mpeg_f_code
[1][0] = f_code
;
1382 s
->mpeg_f_code
[1][1] = f_code
;
1384 s
->current_picture
.pict_type
= s
->pict_type
;
1385 s
->current_picture
.key_frame
= s
->pict_type
== I_TYPE
;
1387 if(avctx
->debug
& FF_DEBUG_PICT_INFO
)
1388 av_log(avctx
, AV_LOG_DEBUG
, "vbv_delay %d, ref %d type:%d\n", vbv_delay
, ref
, s
->pict_type
);
1396 static void mpeg_decode_sequence_extension(Mpeg1Context
*s1
)
1398 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1399 int horiz_size_ext
, vert_size_ext
;
1402 skip_bits(&s
->gb
, 1); /* profil and level esc*/
1403 s
->avctx
->profile
= get_bits(&s
->gb
, 3);
1404 s
->avctx
->level
= get_bits(&s
->gb
, 4);
1405 s
->progressive_sequence
= get_bits1(&s
->gb
); /* progressive_sequence */
1406 s
->chroma_format
= get_bits(&s
->gb
, 2); /* chroma_format 1=420, 2=422, 3=444 */
1407 horiz_size_ext
= get_bits(&s
->gb
, 2);
1408 vert_size_ext
= get_bits(&s
->gb
, 2);
1409 s
->width
|= (horiz_size_ext
<< 12);
1410 s
->height
|= (vert_size_ext
<< 12);
1411 bit_rate_ext
= get_bits(&s
->gb
, 12); /* XXX: handle it */
1412 s
->bit_rate
+= (bit_rate_ext
<< 18) * 400;
1413 skip_bits1(&s
->gb
); /* marker */
1414 s
->avctx
->rc_buffer_size
+= get_bits(&s
->gb
, 8)*1024*16<<10;
1416 s
->low_delay
= get_bits1(&s
->gb
);
1417 if(s
->flags
& CODEC_FLAG_LOW_DELAY
) s
->low_delay
=1;
1419 s1
->frame_rate_ext
.num
= get_bits(&s
->gb
, 2)+1;
1420 s1
->frame_rate_ext
.den
= get_bits(&s
->gb
, 5)+1;
1422 dprintf(s
->avctx
, "sequence extension\n");
1423 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG2VIDEO
;
1424 s
->avctx
->sub_id
= 2; /* indicates mpeg2 found */
1426 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1427 av_log(s
->avctx
, AV_LOG_DEBUG
, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1428 s
->avctx
->profile
, s
->avctx
->level
, s
->avctx
->rc_buffer_size
, s
->bit_rate
);
1432 static void mpeg_decode_sequence_display_extension(Mpeg1Context
*s1
)
1434 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1435 int color_description
, w
, h
;
1437 skip_bits(&s
->gb
, 3); /* video format */
1438 color_description
= get_bits1(&s
->gb
);
1439 if(color_description
){
1440 skip_bits(&s
->gb
, 8); /* color primaries */
1441 skip_bits(&s
->gb
, 8); /* transfer_characteristics */
1442 skip_bits(&s
->gb
, 8); /* matrix_coefficients */
1444 w
= get_bits(&s
->gb
, 14);
1445 skip_bits(&s
->gb
, 1); //marker
1446 h
= get_bits(&s
->gb
, 14);
1447 skip_bits(&s
->gb
, 1); //marker
1449 s1
->pan_scan
.width
= 16*w
;
1450 s1
->pan_scan
.height
=16*h
;
1452 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1453 av_log(s
->avctx
, AV_LOG_DEBUG
, "sde w:%d, h:%d\n", w
, h
);
1456 static void mpeg_decode_picture_display_extension(Mpeg1Context
*s1
)
1458 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1462 if(s
->progressive_sequence
){
1463 if(s
->repeat_first_field
){
1465 if(s
->top_field_first
)
1469 if(s
->picture_structure
== PICT_FRAME
){
1471 if(s
->repeat_first_field
)
1475 for(i
=0; i
<nofco
; i
++){
1476 s1
->pan_scan
.position
[i
][0]= get_sbits(&s
->gb
, 16);
1477 skip_bits(&s
->gb
, 1); //marker
1478 s1
->pan_scan
.position
[i
][1]= get_sbits(&s
->gb
, 16);
1479 skip_bits(&s
->gb
, 1); //marker
1482 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
1483 av_log(s
->avctx
, AV_LOG_DEBUG
, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1484 s1
->pan_scan
.position
[0][0], s1
->pan_scan
.position
[0][1],
1485 s1
->pan_scan
.position
[1][0], s1
->pan_scan
.position
[1][1],
1486 s1
->pan_scan
.position
[2][0], s1
->pan_scan
.position
[2][1]
1490 static void mpeg_decode_quant_matrix_extension(MpegEncContext
*s
)
1494 dprintf(s
->avctx
, "matrix extension\n");
1496 if (get_bits1(&s
->gb
)) {
1498 v
= get_bits(&s
->gb
, 8);
1499 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1500 s
->intra_matrix
[j
] = v
;
1501 s
->chroma_intra_matrix
[j
] = v
;
1504 if (get_bits1(&s
->gb
)) {
1506 v
= get_bits(&s
->gb
, 8);
1507 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1508 s
->inter_matrix
[j
] = v
;
1509 s
->chroma_inter_matrix
[j
] = v
;
1512 if (get_bits1(&s
->gb
)) {
1514 v
= get_bits(&s
->gb
, 8);
1515 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1516 s
->chroma_intra_matrix
[j
] = v
;
1519 if (get_bits1(&s
->gb
)) {
1521 v
= get_bits(&s
->gb
, 8);
1522 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1523 s
->chroma_inter_matrix
[j
] = v
;
1528 static void mpeg_decode_picture_coding_extension(MpegEncContext
*s
)
1530 s
->full_pel
[0] = s
->full_pel
[1] = 0;
1531 s
->mpeg_f_code
[0][0] = get_bits(&s
->gb
, 4);
1532 s
->mpeg_f_code
[0][1] = get_bits(&s
->gb
, 4);
1533 s
->mpeg_f_code
[1][0] = get_bits(&s
->gb
, 4);
1534 s
->mpeg_f_code
[1][1] = get_bits(&s
->gb
, 4);
1535 s
->intra_dc_precision
= get_bits(&s
->gb
, 2);
1536 s
->picture_structure
= get_bits(&s
->gb
, 2);
1537 s
->top_field_first
= get_bits1(&s
->gb
);
1538 s
->frame_pred_frame_dct
= get_bits1(&s
->gb
);
1539 s
->concealment_motion_vectors
= get_bits1(&s
->gb
);
1540 s
->q_scale_type
= get_bits1(&s
->gb
);
1541 s
->intra_vlc_format
= get_bits1(&s
->gb
);
1542 s
->alternate_scan
= get_bits1(&s
->gb
);
1543 s
->repeat_first_field
= get_bits1(&s
->gb
);
1544 s
->chroma_420_type
= get_bits1(&s
->gb
);
1545 s
->progressive_frame
= get_bits1(&s
->gb
);
1547 if(s
->picture_structure
== PICT_FRAME
){
1549 s
->v_edge_pos
= 16*s
->mb_height
;
1551 s
->first_field
^= 1;
1552 s
->v_edge_pos
= 8*s
->mb_height
;
1553 memset(s
->mbskip_table
, 0, s
->mb_stride
*s
->mb_height
);
1556 if(s
->alternate_scan
){
1557 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->inter_scantable
, ff_alternate_vertical_scan
);
1558 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->intra_scantable
, ff_alternate_vertical_scan
);
1560 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->inter_scantable
, ff_zigzag_direct
);
1561 ff_init_scantable(s
->dsp
.idct_permutation
, &s
->intra_scantable
, ff_zigzag_direct
);
1564 /* composite display not parsed */
1565 dprintf(s
->avctx
, "intra_dc_precision=%d\n", s
->intra_dc_precision
);
1566 dprintf(s
->avctx
, "picture_structure=%d\n", s
->picture_structure
);
1567 dprintf(s
->avctx
, "top field first=%d\n", s
->top_field_first
);
1568 dprintf(s
->avctx
, "repeat first field=%d\n", s
->repeat_first_field
);
1569 dprintf(s
->avctx
, "conceal=%d\n", s
->concealment_motion_vectors
);
1570 dprintf(s
->avctx
, "intra_vlc_format=%d\n", s
->intra_vlc_format
);
1571 dprintf(s
->avctx
, "alternate_scan=%d\n", s
->alternate_scan
);
1572 dprintf(s
->avctx
, "frame_pred_frame_dct=%d\n", s
->frame_pred_frame_dct
);
1573 dprintf(s
->avctx
, "progressive_frame=%d\n", s
->progressive_frame
);
1576 static void mpeg_decode_extension(AVCodecContext
*avctx
,
1577 const uint8_t *buf
, int buf_size
)
1579 Mpeg1Context
*s1
= avctx
->priv_data
;
1580 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1583 init_get_bits(&s
->gb
, buf
, buf_size
*8);
1585 ext_type
= get_bits(&s
->gb
, 4);
1588 mpeg_decode_sequence_extension(s1
);
1591 mpeg_decode_sequence_display_extension(s1
);
1594 mpeg_decode_quant_matrix_extension(s
);
1597 mpeg_decode_picture_display_extension(s1
);
1600 mpeg_decode_picture_coding_extension(s
);
1605 static void exchange_uv(MpegEncContext
*s
){
1606 short * tmp
= s
->pblocks
[4];
1607 s
->pblocks
[4] = s
->pblocks
[5];
1608 s
->pblocks
[5] = tmp
;
1611 static int mpeg_field_start(MpegEncContext
*s
){
1612 AVCodecContext
*avctx
= s
->avctx
;
1613 Mpeg1Context
*s1
= (Mpeg1Context
*)s
;
1615 /* start frame decoding */
1616 if(s
->first_field
|| s
->picture_structure
==PICT_FRAME
){
1617 if(MPV_frame_start(s
, avctx
) < 0)
1620 ff_er_frame_start(s
);
1622 /* first check if we must repeat the frame */
1623 s
->current_picture_ptr
->repeat_pict
= 0;
1624 if (s
->repeat_first_field
) {
1625 if (s
->progressive_sequence
) {
1626 if (s
->top_field_first
)
1627 s
->current_picture_ptr
->repeat_pict
= 4;
1629 s
->current_picture_ptr
->repeat_pict
= 2;
1630 } else if (s
->progressive_frame
) {
1631 s
->current_picture_ptr
->repeat_pict
= 1;
1635 *s
->current_picture_ptr
->pan_scan
= s1
->pan_scan
;
1636 }else{ //second field
1639 if(!s
->current_picture_ptr
){
1640 av_log(s
->avctx
, AV_LOG_ERROR
, "first field missing\n");
1645 s
->current_picture
.data
[i
] = s
->current_picture_ptr
->data
[i
];
1646 if(s
->picture_structure
== PICT_BOTTOM_FIELD
){
1647 s
->current_picture
.data
[i
] += s
->current_picture_ptr
->linesize
[i
];
1652 // MPV_frame_start will call this function too,
1653 // but we need to call it on every field
1654 if(s
->avctx
->xvmc_acceleration
)
1655 XVMC_field_start(s
,avctx
);
1661 #define DECODE_SLICE_ERROR -1
1662 #define DECODE_SLICE_OK 0
1665 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
1666 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
1667 * DECODE_SLICE_OK if this slice is ok<br>
1669 static int mpeg_decode_slice(Mpeg1Context
*s1
, int mb_y
,
1670 const uint8_t **buf
, int buf_size
)
1672 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1673 AVCodecContext
*avctx
= s
->avctx
;
1674 const int field_pic
= s
->picture_structure
!= PICT_FRAME
;
1675 const int lowres
= s
->avctx
->lowres
;
1680 if (mb_y
<<field_pic
>= s
->mb_height
){
1681 av_log(s
->avctx
, AV_LOG_ERROR
, "slice below image (%d >= %d)\n", mb_y
, s
->mb_height
);
1685 init_get_bits(&s
->gb
, *buf
, buf_size
*8);
1687 ff_mpeg1_clean_buffers(s
);
1688 s
->interlaced_dct
= 0;
1690 s
->qscale
= get_qscale(s
);
1693 av_log(s
->avctx
, AV_LOG_ERROR
, "qscale == 0\n");
1697 /* extra slice info */
1698 while (get_bits1(&s
->gb
) != 0) {
1699 skip_bits(&s
->gb
, 8);
1705 int code
= get_vlc2(&s
->gb
, mbincr_vlc
.table
, MBINCR_VLC_BITS
, 2);
1707 av_log(s
->avctx
, AV_LOG_ERROR
, "first mb_incr damaged\n");
1714 /* otherwise, stuffing, nothing to do */
1720 if(s
->mb_x
>= (unsigned)s
->mb_width
){
1721 av_log(s
->avctx
, AV_LOG_ERROR
, "initial skip overflow\n");
1725 s
->resync_mb_x
= s
->mb_x
;
1726 s
->resync_mb_y
= s
->mb_y
= mb_y
;
1728 ff_init_block_index(s
);
1730 if (s
->mb_y
==0 && s
->mb_x
==0 && (s
->first_field
|| s
->picture_structure
==PICT_FRAME
)) {
1731 if(s
->avctx
->debug
&FF_DEBUG_PICT_INFO
){
1732 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",
1733 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],
1734 s
->pict_type
== I_TYPE
? "I" : (s
->pict_type
== P_TYPE
? "P" : (s
->pict_type
== B_TYPE
? "B" : "S")),
1735 s
->progressive_sequence
? "ps" :"", s
->progressive_frame
? "pf" : "", s
->alternate_scan
? "alt" :"", s
->top_field_first
? "top" :"",
1736 s
->intra_dc_precision
, s
->picture_structure
, s
->frame_pred_frame_dct
, s
->concealment_motion_vectors
,
1737 s
->q_scale_type
, s
->intra_vlc_format
, s
->repeat_first_field
, s
->chroma_420_type
? "420" :"");
1743 //one 1 we memcpy blocks in xvmcvideo
1744 if(s
->avctx
->xvmc_acceleration
> 1)
1745 XVMC_init_block(s
);//set s->block
1748 if(mpeg_decode_mb(s
, s
->block
) < 0)
1751 if(s
->current_picture
.motion_val
[0] && !s
->encoding
){ //note motion_val is normally NULL unless we want to extract the MVs
1752 const int wrap
= field_pic
? 2*s
->b8_stride
: s
->b8_stride
;
1753 int xy
= s
->mb_x
*2 + s
->mb_y
*2*wrap
;
1754 int motion_x
, motion_y
, dir
, i
;
1755 if(field_pic
&& !s
->first_field
)
1759 for(dir
=0; dir
<2; dir
++){
1760 if (s
->mb_intra
|| (dir
==1 && s
->pict_type
!= B_TYPE
)) {
1761 motion_x
= motion_y
= 0;
1762 }else if (s
->mv_type
== MV_TYPE_16X16
|| (s
->mv_type
== MV_TYPE_FIELD
&& field_pic
)){
1763 motion_x
= s
->mv
[dir
][0][0];
1764 motion_y
= s
->mv
[dir
][0][1];
1765 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
1766 motion_x
= s
->mv
[dir
][i
][0];
1767 motion_y
= s
->mv
[dir
][i
][1];
1770 s
->current_picture
.motion_val
[dir
][xy
][0] = motion_x
;
1771 s
->current_picture
.motion_val
[dir
][xy
][1] = motion_y
;
1772 s
->current_picture
.motion_val
[dir
][xy
+ 1][0] = motion_x
;
1773 s
->current_picture
.motion_val
[dir
][xy
+ 1][1] = motion_y
;
1774 s
->current_picture
.ref_index
[dir
][xy
]=
1775 s
->current_picture
.ref_index
[dir
][xy
+ 1]= s
->field_select
[dir
][i
];
1776 assert(s
->field_select
[dir
][i
]==0 || s
->field_select
[dir
][i
]==1);
1782 s
->dest
[0] += 16 >> lowres
;
1783 s
->dest
[1] +=(16 >> lowres
) >> s
->chroma_x_shift
;
1784 s
->dest
[2] +=(16 >> lowres
) >> s
->chroma_x_shift
;
1786 MPV_decode_mb(s
, s
->block
);
1788 if (++s
->mb_x
>= s
->mb_width
) {
1789 const int mb_size
= 16>>s
->avctx
->lowres
;
1791 ff_draw_horiz_band(s
, mb_size
*s
->mb_y
, mb_size
);
1796 if(s
->mb_y
<<field_pic
>= s
->mb_height
){
1797 int left
= s
->gb
.size_in_bits
- get_bits_count(&s
->gb
);
1798 int is_d10
= s
->chroma_format
==2 && s
->pict_type
==I_TYPE
&& avctx
->profile
==0 && avctx
->level
==5
1799 && s
->intra_dc_precision
== 2 && s
->q_scale_type
== 1 && s
->alternate_scan
== 0
1800 && s
->progressive_frame
== 0 /* vbv_delay == 0xBBB || 0xE10*/;
1802 if(left
< 0 || (left
&& show_bits(&s
->gb
, FFMIN(left
, 23)) && !is_d10
)
1803 || (avctx
->error_resilience
>= FF_ER_AGGRESSIVE
&& left
>8)){
1804 av_log(avctx
, AV_LOG_ERROR
, "end mismatch left=%d %0X\n", left
, show_bits(&s
->gb
, FFMIN(left
, 23)));
1810 ff_init_block_index(s
);
1813 /* skip mb handling */
1814 if (s
->mb_skip_run
== -1) {
1815 /* read again increment */
1818 int code
= get_vlc2(&s
->gb
, mbincr_vlc
.table
, MBINCR_VLC_BITS
, 2);
1820 av_log(s
->avctx
, AV_LOG_ERROR
, "mb incr damaged\n");
1825 s
->mb_skip_run
+= 33;
1826 }else if(code
== 35){
1827 if(s
->mb_skip_run
!= 0 || show_bits(&s
->gb
, 15) != 0){
1828 av_log(s
->avctx
, AV_LOG_ERROR
, "slice mismatch\n");
1831 goto eos
; /* end of slice */
1833 /* otherwise, stuffing, nothing to do */
1835 s
->mb_skip_run
+= code
;
1841 if(s
->pict_type
== I_TYPE
){
1842 av_log(s
->avctx
, AV_LOG_ERROR
, "skipped MB in I frame at %d %d\n", s
->mb_x
, s
->mb_y
);
1849 s
->block_last_index
[i
] = -1;
1850 if(s
->picture_structure
== PICT_FRAME
)
1851 s
->mv_type
= MV_TYPE_16X16
;
1853 s
->mv_type
= MV_TYPE_FIELD
;
1854 if (s
->pict_type
== P_TYPE
) {
1855 /* if P type, zero motion vector is implied */
1856 s
->mv_dir
= MV_DIR_FORWARD
;
1857 s
->mv
[0][0][0] = s
->mv
[0][0][1] = 0;
1858 s
->last_mv
[0][0][0] = s
->last_mv
[0][0][1] = 0;
1859 s
->last_mv
[0][1][0] = s
->last_mv
[0][1][1] = 0;
1860 s
->field_select
[0][0]= s
->picture_structure
- 1;
1862 /* if B type, reuse previous vectors and directions */
1863 s
->mv
[0][0][0] = s
->last_mv
[0][0][0];
1864 s
->mv
[0][0][1] = s
->last_mv
[0][0][1];
1865 s
->mv
[1][0][0] = s
->last_mv
[1][0][0];
1866 s
->mv
[1][0][1] = s
->last_mv
[1][0][1];
1871 eos
: // end of slice
1872 *buf
+= get_bits_count(&s
->gb
)/8 - 1;
1873 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1877 static int slice_decode_thread(AVCodecContext
*c
, void *arg
){
1878 MpegEncContext
*s
= arg
;
1879 const uint8_t *buf
= s
->gb
.buffer
;
1880 int mb_y
= s
->start_mb_y
;
1882 s
->error_count
= 3*(s
->end_mb_y
- s
->start_mb_y
)*s
->mb_width
;
1885 uint32_t start_code
;
1888 ret
= mpeg_decode_slice((Mpeg1Context
*)s
, mb_y
, &buf
, s
->gb
.buffer_end
- buf
);
1890 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1891 //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);
1893 if(s
->resync_mb_x
>=0 && s
->resync_mb_y
>=0)
1894 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
);
1896 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
);
1899 if(s
->mb_y
== s
->end_mb_y
)
1903 buf
= ff_find_start_code(buf
, s
->gb
.buffer_end
, &start_code
);
1904 mb_y
= start_code
- SLICE_MIN_START_CODE
;
1905 if(mb_y
< 0 || mb_y
>= s
->end_mb_y
)
1909 return 0; //not reached
1913 * handles slice ends.
1914 * @return 1 if it seems to be the last slice of
1916 static int slice_end(AVCodecContext
*avctx
, AVFrame
*pict
)
1918 Mpeg1Context
*s1
= avctx
->priv_data
;
1919 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1921 if (!s1
->mpeg_enc_ctx_allocated
|| !s
->current_picture_ptr
)
1925 if(s
->avctx
->xvmc_acceleration
)
1928 /* end of slice reached */
1929 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s
->first_field
) {
1932 s
->current_picture_ptr
->qscale_type
= FF_QSCALE_TYPE_MPEG2
;
1938 if (s
->pict_type
== B_TYPE
|| s
->low_delay
) {
1939 *pict
= *(AVFrame
*)s
->current_picture_ptr
;
1940 ff_print_debug_info(s
, pict
);
1942 s
->picture_number
++;
1943 /* latency of 1 frame for I and P frames */
1944 /* XXX: use another variable than picture_number */
1945 if (s
->last_picture_ptr
!= NULL
) {
1946 *pict
= *(AVFrame
*)s
->last_picture_ptr
;
1947 ff_print_debug_info(s
, pict
);
1957 static int mpeg1_decode_sequence(AVCodecContext
*avctx
,
1958 const uint8_t *buf
, int buf_size
)
1960 Mpeg1Context
*s1
= avctx
->priv_data
;
1961 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
1965 init_get_bits(&s
->gb
, buf
, buf_size
*8);
1967 width
= get_bits(&s
->gb
, 12);
1968 height
= get_bits(&s
->gb
, 12);
1969 if (width
<= 0 || height
<= 0 ||
1970 (width
% 2) != 0 || (height
% 2) != 0)
1972 s
->aspect_ratio_info
= get_bits(&s
->gb
, 4);
1973 if (s
->aspect_ratio_info
== 0)
1975 s
->frame_rate_index
= get_bits(&s
->gb
, 4);
1976 if (s
->frame_rate_index
== 0 || s
->frame_rate_index
> 13)
1978 s
->bit_rate
= get_bits(&s
->gb
, 18) * 400;
1979 if (get_bits1(&s
->gb
) == 0) /* marker */
1984 s
->avctx
->rc_buffer_size
= get_bits(&s
->gb
, 10) * 1024*16;
1985 skip_bits(&s
->gb
, 1);
1988 if (get_bits1(&s
->gb
)) {
1990 v
= get_bits(&s
->gb
, 8);
1992 av_log(s
->avctx
, AV_LOG_ERROR
, "intra matrix damaged\n");
1995 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
1996 s
->intra_matrix
[j
] = v
;
1997 s
->chroma_intra_matrix
[j
] = v
;
2000 dprintf(s
->avctx
, "intra matrix present\n");
2002 dprintf(s
->avctx
, " %d", s
->intra_matrix
[s
->dsp
.idct_permutation
[i
]]);
2003 dprintf(s
->avctx
, "\n");
2007 j
= s
->dsp
.idct_permutation
[i
];
2008 v
= ff_mpeg1_default_intra_matrix
[i
];
2009 s
->intra_matrix
[j
] = v
;
2010 s
->chroma_intra_matrix
[j
] = v
;
2013 if (get_bits1(&s
->gb
)) {
2015 v
= get_bits(&s
->gb
, 8);
2017 av_log(s
->avctx
, AV_LOG_ERROR
, "inter matrix damaged\n");
2020 j
= s
->dsp
.idct_permutation
[ ff_zigzag_direct
[i
] ];
2021 s
->inter_matrix
[j
] = v
;
2022 s
->chroma_inter_matrix
[j
] = v
;
2025 dprintf(s
->avctx
, "non intra matrix present\n");
2027 dprintf(s
->avctx
, " %d", s
->inter_matrix
[s
->dsp
.idct_permutation
[i
]]);
2028 dprintf(s
->avctx
, "\n");
2032 int j
= s
->dsp
.idct_permutation
[i
];
2033 v
= ff_mpeg1_default_non_intra_matrix
[i
];
2034 s
->inter_matrix
[j
] = v
;
2035 s
->chroma_inter_matrix
[j
] = v
;
2039 if(show_bits(&s
->gb
, 23) != 0){
2040 av_log(s
->avctx
, AV_LOG_ERROR
, "sequence header damaged\n");
2044 /* we set mpeg2 parameters so that it emulates mpeg1 */
2045 s
->progressive_sequence
= 1;
2046 s
->progressive_frame
= 1;
2047 s
->picture_structure
= PICT_FRAME
;
2048 s
->frame_pred_frame_dct
= 1;
2049 s
->chroma_format
= 1;
2050 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG1VIDEO
;
2051 avctx
->sub_id
= 1; /* indicates mpeg1 */
2052 s
->out_format
= FMT_MPEG1
;
2053 s
->swap_uv
= 0;//AFAIK VCR2 don't have SEQ_HEADER
2054 if(s
->flags
& CODEC_FLAG_LOW_DELAY
) s
->low_delay
=1;
2056 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
2057 av_log(s
->avctx
, AV_LOG_DEBUG
, "vbv buffer: %d, bitrate:%d\n",
2058 s
->avctx
->rc_buffer_size
, s
->bit_rate
);
2063 static int vcr2_init_sequence(AVCodecContext
*avctx
)
2065 Mpeg1Context
*s1
= avctx
->priv_data
;
2066 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
2069 /* start new mpeg1 context decoding */
2070 s
->out_format
= FMT_MPEG1
;
2071 if (s1
->mpeg_enc_ctx_allocated
) {
2074 s
->width
= avctx
->coded_width
;
2075 s
->height
= avctx
->coded_height
;
2076 avctx
->has_b_frames
= 0; //true?
2079 if(avctx
->xvmc_acceleration
){
2080 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_xvmc_mpg2_420
);
2082 avctx
->pix_fmt
= avctx
->get_format(avctx
,pixfmt_yuv_420
);
2085 if( avctx
->pix_fmt
== PIX_FMT_XVMC_MPEG2_IDCT
)
2086 if( avctx
->idct_algo
== FF_IDCT_AUTO
)
2087 avctx
->idct_algo
= FF_IDCT_SIMPLE
;
2089 if (MPV_common_init(s
) < 0)
2091 exchange_uv(s
);//common init reset pblocks, so we swap them here
2092 s
->swap_uv
= 1;// in case of xvmc we need to swap uv for each MB
2093 s1
->mpeg_enc_ctx_allocated
= 1;
2096 int j
= s
->dsp
.idct_permutation
[i
];
2097 v
= ff_mpeg1_default_intra_matrix
[i
];
2098 s
->intra_matrix
[j
] = v
;
2099 s
->chroma_intra_matrix
[j
] = v
;
2101 v
= ff_mpeg1_default_non_intra_matrix
[i
];
2102 s
->inter_matrix
[j
] = v
;
2103 s
->chroma_inter_matrix
[j
] = v
;
2106 s
->progressive_sequence
= 1;
2107 s
->progressive_frame
= 1;
2108 s
->picture_structure
= PICT_FRAME
;
2109 s
->frame_pred_frame_dct
= 1;
2110 s
->chroma_format
= 1;
2111 s
->codec_id
= s
->avctx
->codec_id
= CODEC_ID_MPEG2VIDEO
;
2112 avctx
->sub_id
= 2; /* indicates mpeg2 */
2117 static void mpeg_decode_user_data(AVCodecContext
*avctx
,
2118 const uint8_t *buf
, int buf_size
)
2125 /* we parse the DTG active format information */
2127 p
[0] == 'D' && p
[1] == 'T' && p
[2] == 'G' && p
[3] == '1') {
2141 avctx
->dtg_active_format
= p
[0] & 0x0f;
2146 static void mpeg_decode_gop(AVCodecContext
*avctx
,
2147 const uint8_t *buf
, int buf_size
){
2148 Mpeg1Context
*s1
= avctx
->priv_data
;
2149 MpegEncContext
*s
= &s1
->mpeg_enc_ctx
;
2151 int drop_frame_flag
;
2152 int time_code_hours
, time_code_minutes
;
2153 int time_code_seconds
, time_code_pictures
;
2156 init_get_bits(&s
->gb
, buf
, buf_size
*8);
2158 drop_frame_flag
= get_bits1(&s
->gb
);
2160 time_code_hours
=get_bits(&s
->gb
,5);
2161 time_code_minutes
= get_bits(&s
->gb
,6);
2162 skip_bits1(&s
->gb
);//marker bit
2163 time_code_seconds
= get_bits(&s
->gb
,6);
2164 time_code_pictures
= get_bits(&s
->gb
,6);
2166 /*broken_link indicate that after editing the
2167 reference frames of the first B-Frames after GOP I-Frame
2168 are missing (open gop)*/
2169 broken_link
= get_bits1(&s
->gb
);
2171 if(s
->avctx
->debug
& FF_DEBUG_PICT_INFO
)
2172 av_log(s
->avctx
, AV_LOG_DEBUG
, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
2173 time_code_hours
, time_code_minutes
, time_code_seconds
,
2174 time_code_pictures
, broken_link
);
2177 * finds the end of the current frame in the bitstream.
2178 * @return the position of the first byte of the next frame, or -1
2180 int ff_mpeg1_find_frame_end(ParseContext
*pc
, const uint8_t *buf
, int buf_size
)
2183 uint32_t state
= pc
->state
;
2186 if(!pc
->frame_start_found
){
2187 for(i
=0; i
<buf_size
; i
++){
2188 i
= ff_find_start_code(buf
+i
, buf
+buf_size
, &state
) - buf
- 1;
2189 if(state
>= SLICE_MIN_START_CODE
&& state
<= SLICE_MAX_START_CODE
){
2191 pc
->frame_start_found
=1;
2194 if(state
== SEQ_END_CODE
){
2201 if(pc
->frame_start_found
){
2202 /* EOF considered as end of frame */
2205 for(; i
<buf_size
; i
++){
2206 i
= ff_find_start_code(buf
+i
, buf
+buf_size
, &state
) - buf
- 1;
2207 if((state
&0xFFFFFF00) == 0x100){
2208 if(state
< SLICE_MIN_START_CODE
|| state
> SLICE_MAX_START_CODE
){
2209 pc
->frame_start_found
=0;
2217 return END_NOT_FOUND
;
2220 /* handle buffering and image synchronisation */
2221 static int mpeg_decode_frame(AVCodecContext
*avctx
,
2222 void *data
, int *data_size
,
2223 uint8_t *buf
, int buf_size
)
2225 Mpeg1Context
*s
= avctx
->priv_data
;
2226 const uint8_t *buf_end
;
2227 const uint8_t *buf_ptr
;
2228 uint32_t start_code
;
2229 int ret
, input_size
;
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
);
2248 if( ff_combine_frame(&s2
->parse_context
, next
, (const uint8_t **)&buf
, &buf_size
) < 0 )
2253 buf_end
= buf
+ buf_size
;
2256 if (s
->repeat_field
% 2 == 1) {
2258 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2259 // s2->picture_number, s->repeat_field);
2260 if (avctx
->flags
& CODEC_FLAG_REPEAT_FIELD
) {
2261 *data_size
= sizeof(AVPicture
);
2267 if(s
->mpeg_enc_ctx_allocated
==0 && avctx
->codec_tag
== ff_get_fourcc("VCR2"))
2268 vcr2_init_sequence(avctx
);
2273 /* find start next code */
2275 buf_ptr
= ff_find_start_code(buf_ptr
,buf_end
, &start_code
);
2276 if (start_code
> 0x1ff){
2277 if(s2
->pict_type
!= B_TYPE
|| avctx
->skip_frame
<= AVDISCARD_DEFAULT
){
2278 if(avctx
->thread_count
> 1){
2281 avctx
->execute(avctx
, slice_decode_thread
, (void**)&(s2
->thread_context
[0]), NULL
, s
->slice_count
);
2282 for(i
=0; i
<s
->slice_count
; i
++)
2283 s2
->error_count
+= s2
->thread_context
[i
]->error_count
;
2285 if (slice_end(avctx
, picture
)) {
2286 if(s2
->last_picture_ptr
|| s2
->low_delay
) //FIXME merge with the stuff in mpeg_decode_slice
2287 *data_size
= sizeof(AVPicture
);
2290 return FFMAX(0, buf_ptr
- buf
- s2
->parse_context
.last_index
);
2293 input_size
= buf_end
- buf_ptr
;
2295 if(avctx
->debug
& FF_DEBUG_STARTCODE
){
2296 av_log(avctx
, AV_LOG_DEBUG
, "%3X at %zd left %d\n", start_code
, buf_ptr
-buf
, input_size
);
2299 /* prepare data for next start code */
2300 switch(start_code
) {
2301 case SEQ_START_CODE
:
2302 mpeg1_decode_sequence(avctx
, buf_ptr
,
2306 case PICTURE_START_CODE
:
2307 /* we have a complete image : we try to decompress it */
2308 mpeg1_decode_picture(avctx
,
2309 buf_ptr
, input_size
);
2311 case EXT_START_CODE
:
2312 mpeg_decode_extension(avctx
,
2313 buf_ptr
, input_size
);
2315 case USER_START_CODE
:
2316 mpeg_decode_user_data(avctx
,
2317 buf_ptr
, input_size
);
2319 case GOP_START_CODE
:
2321 mpeg_decode_gop(avctx
,
2322 buf_ptr
, input_size
);
2325 if (start_code
>= SLICE_MIN_START_CODE
&&
2326 start_code
<= SLICE_MAX_START_CODE
) {
2327 int mb_y
= start_code
- SLICE_MIN_START_CODE
;
2329 if(s2
->last_picture_ptr
==NULL
){
2330 /* Skip B-frames if we do not have reference frames. */
2331 if(s2
->pict_type
==B_TYPE
) break;
2333 if(s2
->next_picture_ptr
==NULL
){
2334 /* Skip P-frames if we do not have reference frame no valid header. */
2335 if(s2
->pict_type
==P_TYPE
&& (s2
->first_field
|| s2
->picture_structure
==PICT_FRAME
)) break;
2337 /* Skip B-frames if we are in a hurry. */
2338 if(avctx
->hurry_up
&& s2
->pict_type
==B_TYPE
) break;
2339 if( (avctx
->skip_frame
>= AVDISCARD_NONREF
&& s2
->pict_type
==B_TYPE
)
2340 ||(avctx
->skip_frame
>= AVDISCARD_NONKEY
&& s2
->pict_type
!=I_TYPE
)
2341 || avctx
->skip_frame
>= AVDISCARD_ALL
)
2343 /* Skip everything if we are in a hurry>=5. */
2344 if(avctx
->hurry_up
>=5) break;
2346 if (!s
->mpeg_enc_ctx_allocated
) break;
2348 if(s2
->codec_id
== CODEC_ID_MPEG2VIDEO
){
2349 if(mb_y
< avctx
->skip_top
|| mb_y
>= s2
->mb_height
- avctx
->skip_bottom
)
2353 if(s2
->first_slice
){
2355 if(mpeg_field_start(s2
) < 0)
2358 if(!s2
->current_picture_ptr
){
2359 av_log(avctx
, AV_LOG_ERROR
, "current_picture not initialized\n");
2363 if(avctx
->thread_count
> 1){
2364 int threshold
= (s2
->mb_height
*s
->slice_count
+ avctx
->thread_count
/2) / avctx
->thread_count
;
2365 if(threshold
<= mb_y
){
2366 MpegEncContext
*thread_context
= s2
->thread_context
[s
->slice_count
];
2368 thread_context
->start_mb_y
= mb_y
;
2369 thread_context
->end_mb_y
= s2
->mb_height
;
2371 s2
->thread_context
[s
->slice_count
-1]->end_mb_y
= mb_y
;
2372 ff_update_duplicate_context(thread_context
, s2
);
2374 init_get_bits(&thread_context
->gb
, buf_ptr
, input_size
*8);
2377 buf_ptr
+= 2; //FIXME add minimum num of bytes per slice
2379 ret
= mpeg_decode_slice(s
, mb_y
, &buf_ptr
, input_size
);
2383 if(s2
->resync_mb_x
>=0 && s2
->resync_mb_y
>=0)
2384 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
);
2386 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
);
2395 static int mpeg_decode_end(AVCodecContext
*avctx
)
2397 Mpeg1Context
*s
= avctx
->priv_data
;
2399 if (s
->mpeg_enc_ctx_allocated
)
2400 MPV_common_end(&s
->mpeg_enc_ctx
);
2404 AVCodec mpeg1video_decoder
= {
2407 CODEC_ID_MPEG1VIDEO
,
2408 sizeof(Mpeg1Context
),
2413 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2414 .flush
= ff_mpeg_flush
,
2417 AVCodec mpeg2video_decoder
= {
2420 CODEC_ID_MPEG2VIDEO
,
2421 sizeof(Mpeg1Context
),
2426 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2427 .flush
= ff_mpeg_flush
,
2431 AVCodec mpegvideo_decoder
= {
2434 CODEC_ID_MPEG2VIDEO
,
2435 sizeof(Mpeg1Context
),
2440 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_DELAY
,
2441 .flush
= ff_mpeg_flush
,
2445 static int mpeg_mc_decode_init(AVCodecContext
*avctx
){
2448 if( avctx
->thread_count
> 1)
2450 if( !(avctx
->slice_flags
& SLICE_FLAG_CODED_ORDER
) )
2452 if( !(avctx
->slice_flags
& SLICE_FLAG_ALLOW_FIELD
) ){
2453 dprintf(avctx
, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2455 mpeg_decode_init(avctx
);
2456 s
= avctx
->priv_data
;
2458 avctx
->pix_fmt
= PIX_FMT_XVMC_MPEG2_IDCT
;
2459 avctx
->xvmc_acceleration
= 2;//2 - the blocks are packed!
2464 AVCodec mpeg_xvmc_decoder
= {
2467 CODEC_ID_MPEG2VIDEO_XVMC
,
2468 sizeof(Mpeg1Context
),
2469 mpeg_mc_decode_init
,
2473 CODEC_CAP_DRAW_HORIZ_BAND
| CODEC_CAP_DR1
| CODEC_CAP_TRUNCATED
| CODEC_CAP_HWACCEL
| CODEC_CAP_DELAY
,
2474 .flush
= ff_mpeg_flush
,
2479 /* this is ugly i know, but the alternative is too make
2480 hundreds of vars global and prefix them with ff_mpeg1_
2481 which is far uglier. */