data_size = 0 cleanup
[libav.git] / libavcodec / mpeg12.c
1 /*
2 * MPEG1 codec / MPEG2 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 /**
22 * @file mpeg12.c
23 * MPEG1/2 codec
24 */
25
26 //#define DEBUG
27 #include "avcodec.h"
28 #include "dsputil.h"
29 #include "mpegvideo.h"
30
31 #include "mpeg12data.h"
32
33 //#undef NDEBUG
34 //#include <assert.h>
35
36
37 /* Start codes. */
38 #define SEQ_END_CODE 0x000001b7
39 #define SEQ_START_CODE 0x000001b3
40 #define GOP_START_CODE 0x000001b8
41 #define PICTURE_START_CODE 0x00000100
42 #define SLICE_MIN_START_CODE 0x00000101
43 #define SLICE_MAX_START_CODE 0x000001af
44 #define EXT_START_CODE 0x000001b5
45 #define USER_START_CODE 0x000001b2
46
47 #define DC_VLC_BITS 9
48 #define MV_VLC_BITS 9
49 #define MBINCR_VLC_BITS 9
50 #define MB_PAT_VLC_BITS 9
51 #define MB_PTYPE_VLC_BITS 6
52 #define MB_BTYPE_VLC_BITS 6
53 #define TEX_VLC_BITS 9
54
55 #ifdef CONFIG_ENCODERS
56 static void mpeg1_encode_block(MpegEncContext *s,
57 DCTELEM *block,
58 int component);
59 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
60 #endif //CONFIG_ENCODERS
61 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
62 DCTELEM *block,
63 int n);
64 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
65 DCTELEM *block,
66 int n);
67 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
68 DCTELEM *block,
69 int n);
70 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
71 DCTELEM *block,
72 int n);
73 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
74 static void exchange_uv(MpegEncContext *s);
75
76 #ifdef HAVE_XVMC
77 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
78 extern int XVMC_field_end(MpegEncContext *s);
79 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
80 extern void XVMC_init_block(MpegEncContext *s);//set s->block
81 #endif
82
83 const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
84 const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
85 const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
86 const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
87 PIX_FMT_XVMC_MPEG2_IDCT,
88 PIX_FMT_XVMC_MPEG2_MC,
89 -1};
90 #ifdef CONFIG_ENCODERS
91 static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
92 static uint8_t fcode_tab[MAX_MV*2+1];
93
94 static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
95 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
96
97 /* simple include everything table for dc, first byte is bits number next 3 are code*/
98 static uint32_t mpeg1_lum_dc_uni[512];
99 static uint32_t mpeg1_chr_dc_uni[512];
100
101 static uint8_t mpeg1_index_run[2][64];
102 static int8_t mpeg1_max_level[2][64];
103 #endif //CONFIG_ENCODERS
104
105 static void init_2d_vlc_rl(RLTable *rl)
106 {
107 int i;
108
109 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
110 &rl->table_vlc[0][1], 4, 2,
111 &rl->table_vlc[0][0], 4, 2);
112
113
114 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
115 for(i=0; i<rl->vlc.table_size; i++){
116 int code= rl->vlc.table[i][0];
117 int len = rl->vlc.table[i][1];
118 int level, run;
119
120 if(len==0){ // illegal code
121 run= 65;
122 level= MAX_LEVEL;
123 }else if(len<0){ //more bits needed
124 run= 0;
125 level= code;
126 }else{
127 if(code==rl->n){ //esc
128 run= 65;
129 level= 0;
130 }else if(code==rl->n+1){ //eob
131 run= 0;
132 level= 127;
133 }else{
134 run= rl->table_run [code] + 1;
135 level= rl->table_level[code];
136 }
137 }
138 rl->rl_vlc[0][i].len= len;
139 rl->rl_vlc[0][i].level= level;
140 rl->rl_vlc[0][i].run= run;
141 }
142 }
143
144 #ifdef CONFIG_ENCODERS
145 static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
146 int i;
147
148 for(i=0; i<128; i++){
149 int level= i-64;
150 int run;
151 for(run=0; run<64; run++){
152 int len, bits, code;
153
154 int alevel= ABS(level);
155 int sign= (level>>31)&1;
156
157 if (alevel > rl->max_level[0][run])
158 code= 111; /*rl->n*/
159 else
160 code= rl->index_run[0][run] + alevel - 1;
161
162 if (code < 111 /* rl->n */) {
163 /* store the vlc & sign at once */
164 len= mpeg1_vlc[code][1]+1;
165 bits= (mpeg1_vlc[code][0]<<1) + sign;
166 } else {
167 len= mpeg1_vlc[111/*rl->n*/][1]+6;
168 bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
169
170 bits|= run;
171 if (alevel < 128) {
172 bits<<=8; len+=8;
173 bits|= level & 0xff;
174 } else {
175 bits<<=16; len+=16;
176 bits|= level & 0xff;
177 if (level < 0) {
178 bits|= 0x8001 + level + 255;
179 } else {
180 bits|= level & 0xffff;
181 }
182 }
183 }
184
185 uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
186 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
187 }
188 }
189 }
190
191
192 static int find_frame_rate_index(MpegEncContext *s){
193 int i;
194 int64_t dmin= INT64_MAX;
195 int64_t d;
196
197 for(i=1;i<14;i++) {
198 int64_t n0= 1001LL/frame_rate_tab[i].den*frame_rate_tab[i].num*s->avctx->frame_rate_base;
199 int64_t n1= 1001LL*s->avctx->frame_rate;
200 if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
201
202 d = ABS(n0 - n1);
203 if(d < dmin){
204 dmin=d;
205 s->frame_rate_index= i;
206 }
207 }
208 if(dmin)
209 return -1;
210 else
211 return 0;
212 }
213
214 static int encode_init(AVCodecContext *avctx)
215 {
216 MpegEncContext *s = avctx->priv_data;
217
218 if(MPV_encode_init(avctx) < 0)
219 return -1;
220
221 if(find_frame_rate_index(s) < 0){
222 if(s->strict_std_compliance >=0){
223 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 doesnt support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
224 return -1;
225 }else{
226 av_log(avctx, AV_LOG_INFO, "MPEG1/2 doesnt support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
227 }
228 }
229
230 return 0;
231 }
232
233 static void put_header(MpegEncContext *s, int header)
234 {
235 align_put_bits(&s->pb);
236 put_bits(&s->pb, 16, header>>16);
237 put_bits(&s->pb, 16, header&0xFFFF);
238 }
239
240 /* put sequence header if needed */
241 static void mpeg1_encode_sequence_header(MpegEncContext *s)
242 {
243 unsigned int vbv_buffer_size;
244 unsigned int fps, v;
245 int i;
246 uint64_t time_code;
247 float best_aspect_error= 1E10;
248 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
249 int constraint_parameter_flag;
250
251 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
252
253 if (s->current_picture.key_frame) {
254 AVRational framerate= frame_rate_tab[s->frame_rate_index];
255
256 /* mpeg1 header repeated every gop */
257 put_header(s, SEQ_START_CODE);
258
259 put_bits(&s->pb, 12, s->width);
260 put_bits(&s->pb, 12, s->height);
261
262 for(i=1; i<15; i++){
263 float error= aspect_ratio;
264 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
265 error-= 1.0/mpeg1_aspect[i];
266 else
267 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
268
269 error= ABS(error);
270
271 if(error < best_aspect_error){
272 best_aspect_error= error;
273 s->aspect_ratio_info= i;
274 }
275 }
276
277 put_bits(&s->pb, 4, s->aspect_ratio_info);
278 put_bits(&s->pb, 4, s->frame_rate_index);
279
280 if(s->avctx->rc_max_rate){
281 v = (s->avctx->rc_max_rate + 399) / 400;
282 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
283 v = 0x3ffff;
284 }else{
285 v= 0x3FFFF;
286 }
287
288 if(s->avctx->rc_buffer_size)
289 vbv_buffer_size = s->avctx->rc_buffer_size;
290 else
291 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
292 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
293 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
294
295 put_bits(&s->pb, 18, v & 0x3FFFF);
296 put_bits(&s->pb, 1, 1); /* marker */
297 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
298
299 constraint_parameter_flag=
300 s->width <= 768 && s->height <= 576 &&
301 s->mb_width * s->mb_height <= 396 &&
302 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
303 framerate.num <= framerate.den*30 &&
304 vbv_buffer_size <= 20 &&
305 v <= 1856000/400 &&
306 s->codec_id == CODEC_ID_MPEG1VIDEO;
307
308 put_bits(&s->pb, 1, constraint_parameter_flag);
309
310 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
312
313 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
314 put_header(s, EXT_START_CODE);
315 put_bits(&s->pb, 4, 1); //seq ext
316 put_bits(&s->pb, 1, 0); //esc
317 put_bits(&s->pb, 3, 4); //profile
318 put_bits(&s->pb, 4, 8); //level
319 put_bits(&s->pb, 1, s->progressive_sequence);
320 put_bits(&s->pb, 2, 1); //chroma format 4:2:0
321 put_bits(&s->pb, 2, 0); //horizontal size ext
322 put_bits(&s->pb, 2, 0); //vertical size ext
323 put_bits(&s->pb, 12, v>>18); //bitrate ext
324 put_bits(&s->pb, 1, 1); //marker
325 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
326 put_bits(&s->pb, 1, s->low_delay);
327 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
328 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
329 }
330
331 put_header(s, GOP_START_CODE);
332 put_bits(&s->pb, 1, 0); /* do drop frame */
333 /* time code : we must convert from the real frame rate to a
334 fake mpeg frame rate in case of low frame rate */
335 fps = (framerate.num + framerate.den/2)/ framerate.den;
336 time_code = s->current_picture_ptr->coded_picture_number;
337
338 s->gop_picture_number = time_code;
339 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
340 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
341 put_bits(&s->pb, 1, 1);
342 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
343 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
344 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
345 put_bits(&s->pb, 1, 0); /* broken link */
346 }
347 }
348
349 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
350 while (run >= 33) {
351 put_bits(&s->pb, 11, 0x008);
352 run -= 33;
353 }
354 put_bits(&s->pb, mbAddrIncrTable[run][1],
355 mbAddrIncrTable[run][0]);
356 }
357 #endif //CONFIG_ENCODERS
358
359 static void common_init(MpegEncContext *s)
360 {
361
362 s->y_dc_scale_table=
363 s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
364
365 }
366
367 void ff_mpeg1_clean_buffers(MpegEncContext *s){
368 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
369 s->last_dc[1] = s->last_dc[0];
370 s->last_dc[2] = s->last_dc[0];
371 memset(s->last_mv, 0, sizeof(s->last_mv));
372 }
373
374 #ifdef CONFIG_ENCODERS
375
376 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
377 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
378 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
379 put_bits(&s->pb, 1, 0); /* slice extra information */
380 }
381
382 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
383 {
384 mpeg1_encode_sequence_header(s);
385
386 /* mpeg1 picture header */
387 put_header(s, PICTURE_START_CODE);
388 /* temporal reference */
389
390 // RAL: s->picture_number instead of s->fake_picture_number
391 put_bits(&s->pb, 10, (s->picture_number -
392 s->gop_picture_number) & 0x3ff);
393 put_bits(&s->pb, 3, s->pict_type);
394
395 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
396 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
397
398 // RAL: Forward f_code also needed for B frames
399 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
400 put_bits(&s->pb, 1, 0); /* half pel coordinates */
401 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
402 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
403 else
404 put_bits(&s->pb, 3, 7); /* forward_f_code */
405 }
406
407 // RAL: Backward f_code necessary for B frames
408 if (s->pict_type == B_TYPE) {
409 put_bits(&s->pb, 1, 0); /* half pel coordinates */
410 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
411 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
412 else
413 put_bits(&s->pb, 3, 7); /* backward_f_code */
414 }
415
416 put_bits(&s->pb, 1, 0); /* extra bit picture */
417
418 s->frame_pred_frame_dct = 1;
419 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
420 put_header(s, EXT_START_CODE);
421 put_bits(&s->pb, 4, 8); //pic ext
422 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
423 put_bits(&s->pb, 4, s->f_code);
424 put_bits(&s->pb, 4, s->f_code);
425 }else{
426 put_bits(&s->pb, 8, 255);
427 }
428 if (s->pict_type == B_TYPE) {
429 put_bits(&s->pb, 4, s->b_code);
430 put_bits(&s->pb, 4, s->b_code);
431 }else{
432 put_bits(&s->pb, 8, 255);
433 }
434 put_bits(&s->pb, 2, s->intra_dc_precision);
435
436 assert(s->picture_structure == PICT_FRAME);
437 put_bits(&s->pb, 2, s->picture_structure);
438 if (s->progressive_sequence) {
439 put_bits(&s->pb, 1, 0); /* no repeat */
440 } else {
441 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
442 }
443 /* XXX: optimize the generation of this flag with entropy
444 measures */
445 s->frame_pred_frame_dct = s->progressive_sequence;
446
447 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
448 put_bits(&s->pb, 1, s->concealment_motion_vectors);
449 put_bits(&s->pb, 1, s->q_scale_type);
450 put_bits(&s->pb, 1, s->intra_vlc_format);
451 put_bits(&s->pb, 1, s->alternate_scan);
452 put_bits(&s->pb, 1, s->repeat_first_field);
453 put_bits(&s->pb, 1, s->chroma_420_type=1);
454 s->progressive_frame = s->progressive_sequence;
455 put_bits(&s->pb, 1, s->progressive_frame);
456 put_bits(&s->pb, 1, 0); //composite_display_flag
457 }
458 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
459 int i;
460
461 put_header(s, USER_START_CODE);
462 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
463 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
464 }
465 }
466
467 s->mb_y=0;
468 ff_mpeg1_encode_slice_header(s);
469 }
470
471 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
472 int has_mv, int field_motion)
473 {
474 put_bits(&s->pb, n, bits);
475 if (!s->frame_pred_frame_dct) {
476 if (has_mv)
477 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
478 put_bits(&s->pb, 1, s->interlaced_dct);
479 }
480 }
481
482 void mpeg1_encode_mb(MpegEncContext *s,
483 DCTELEM block[6][64],
484 int motion_x, int motion_y)
485 {
486 int i, cbp;
487 const int mb_x = s->mb_x;
488 const int mb_y = s->mb_y;
489 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
490
491 /* compute cbp */
492 cbp = 0;
493 for(i=0;i<6;i++) {
494 if (s->block_last_index[i] >= 0)
495 cbp |= 1 << (5 - i);
496 }
497
498 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
499 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
500 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
501 (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
502 ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
503 s->mb_skip_run++;
504 s->qscale -= s->dquant;
505 s->skip_count++;
506 s->misc_bits++;
507 s->last_bits++;
508 if(s->pict_type == P_TYPE){
509 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
510 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
511 }
512 } else {
513 if(first_mb){
514 assert(s->mb_skip_run == 0);
515 encode_mb_skip_run(s, s->mb_x);
516 }else{
517 encode_mb_skip_run(s, s->mb_skip_run);
518 }
519
520 if (s->pict_type == I_TYPE) {
521 if(s->dquant && cbp){
522 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
523 put_bits(&s->pb, 5, s->qscale);
524 }else{
525 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
526 s->qscale -= s->dquant;
527 }
528 s->misc_bits+= get_bits_diff(s);
529 s->i_count++;
530 } else if (s->mb_intra) {
531 if(s->dquant && cbp){
532 put_mb_modes(s, 6, 0x01, 0, 0);
533 put_bits(&s->pb, 5, s->qscale);
534 }else{
535 put_mb_modes(s, 5, 0x03, 0, 0);
536 s->qscale -= s->dquant;
537 }
538 s->misc_bits+= get_bits_diff(s);
539 s->i_count++;
540 memset(s->last_mv, 0, sizeof(s->last_mv));
541 } else if (s->pict_type == P_TYPE) {
542 if(s->mv_type == MV_TYPE_16X16){
543 if (cbp != 0) {
544 if ((motion_x|motion_y) == 0) {
545 if(s->dquant){
546 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
547 put_bits(&s->pb, 5, s->qscale);
548 }else{
549 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
550 }
551 s->misc_bits+= get_bits_diff(s);
552 } else {
553 if(s->dquant){
554 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
555 put_bits(&s->pb, 5, s->qscale);
556 }else{
557 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
558 }
559 s->misc_bits+= get_bits_diff(s);
560 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
561 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
562 s->mv_bits+= get_bits_diff(s);
563 }
564 } else {
565 put_bits(&s->pb, 3, 1); /* motion only */
566 if (!s->frame_pred_frame_dct)
567 put_bits(&s->pb, 2, 2); /* motion_type: frame */
568 s->misc_bits+= get_bits_diff(s);
569 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
570 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
571 s->qscale -= s->dquant;
572 s->mv_bits+= get_bits_diff(s);
573 }
574 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
575 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
576 }else{
577 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
578
579 if (cbp) {
580 if(s->dquant){
581 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
582 put_bits(&s->pb, 5, s->qscale);
583 }else{
584 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
585 }
586 } else {
587 put_bits(&s->pb, 3, 1); /* motion only */
588 put_bits(&s->pb, 2, 1); /* motion_type: field */
589 s->qscale -= s->dquant;
590 }
591 s->misc_bits+= get_bits_diff(s);
592 for(i=0; i<2; i++){
593 put_bits(&s->pb, 1, s->field_select[0][i]);
594 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
595 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
596 s->last_mv[0][i][0]= s->mv[0][i][0];
597 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
598 }
599 s->mv_bits+= get_bits_diff(s);
600 }
601 if(cbp)
602 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
603 s->f_count++;
604 } else{
605 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
606
607 if(s->mv_type == MV_TYPE_16X16){
608 if (cbp){ // With coded bloc pattern
609 if (s->dquant) {
610 if(s->mv_dir == MV_DIR_FORWARD)
611 put_mb_modes(s, 6, 3, 1, 0);
612 else
613 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
614 put_bits(&s->pb, 5, s->qscale);
615 } else {
616 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
617 }
618 }else{ // No coded bloc pattern
619 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
620 if (!s->frame_pred_frame_dct)
621 put_bits(&s->pb, 2, 2); /* motion_type: frame */
622 s->qscale -= s->dquant;
623 }
624 s->misc_bits += get_bits_diff(s);
625 if (s->mv_dir&MV_DIR_FORWARD){
626 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
627 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
628 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
629 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
630 s->f_count++;
631 }
632 if (s->mv_dir&MV_DIR_BACKWARD){
633 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
634 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
635 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
636 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
637 s->b_count++;
638 }
639 }else{
640 assert(s->mv_type == MV_TYPE_FIELD);
641 assert(!s->frame_pred_frame_dct);
642 if (cbp){ // With coded bloc pattern
643 if (s->dquant) {
644 if(s->mv_dir == MV_DIR_FORWARD)
645 put_mb_modes(s, 6, 3, 1, 1);
646 else
647 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
648 put_bits(&s->pb, 5, s->qscale);
649 } else {
650 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
651 }
652 }else{ // No coded bloc pattern
653 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
654 put_bits(&s->pb, 2, 1); /* motion_type: field */
655 s->qscale -= s->dquant;
656 }
657 s->misc_bits += get_bits_diff(s);
658 if (s->mv_dir&MV_DIR_FORWARD){
659 for(i=0; i<2; i++){
660 put_bits(&s->pb, 1, s->field_select[0][i]);
661 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
662 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
663 s->last_mv[0][i][0]= s->mv[0][i][0];
664 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
665 }
666 s->f_count++;
667 }
668 if (s->mv_dir&MV_DIR_BACKWARD){
669 for(i=0; i<2; i++){
670 put_bits(&s->pb, 1, s->field_select[1][i]);
671 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
672 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
673 s->last_mv[1][i][0]= s->mv[1][i][0];
674 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
675 }
676 s->b_count++;
677 }
678 }
679 s->mv_bits += get_bits_diff(s);
680 if(cbp)
681 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
682 }
683 for(i=0;i<6;i++) {
684 if (cbp & (1 << (5 - i))) {
685 mpeg1_encode_block(s, block[i], i);
686 }
687 }
688 s->mb_skip_run = 0;
689 if(s->mb_intra)
690 s->i_tex_bits+= get_bits_diff(s);
691 else
692 s->p_tex_bits+= get_bits_diff(s);
693 }
694 }
695
696 // RAL: Parameter added: f_or_b_code
697 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
698 {
699 int code, bit_size, l, m, bits, range, sign;
700
701 if (val == 0) {
702 /* zero vector */
703 code = 0;
704 put_bits(&s->pb,
705 mbMotionVectorTable[0][1],
706 mbMotionVectorTable[0][0]);
707 } else {
708 bit_size = f_or_b_code - 1;
709 range = 1 << bit_size;
710 /* modulo encoding */
711 l = 16 * range;
712 m = 2 * l;
713 if (val < -l) {
714 val += m;
715 } else if (val >= l) {
716 val -= m;
717 }
718
719 if (val >= 0) {
720 val--;
721 code = (val >> bit_size) + 1;
722 bits = val & (range - 1);
723 sign = 0;
724 } else {
725 val = -val;
726 val--;
727 code = (val >> bit_size) + 1;
728 bits = val & (range - 1);
729 sign = 1;
730 }
731
732 assert(code > 0 && code <= 16);
733
734 put_bits(&s->pb,
735 mbMotionVectorTable[code][1],
736 mbMotionVectorTable[code][0]);
737
738 put_bits(&s->pb, 1, sign);
739 if (bit_size > 0) {
740 put_bits(&s->pb, bit_size, bits);
741 }
742 }
743 }
744
745 void ff_mpeg1_encode_init(MpegEncContext *s)
746 {
747 static int done=0;
748
749 common_init(s);
750
751 if(!done){
752 int f_code;
753 int mv;
754 int i;
755
756 done=1;
757 init_rl(&rl_mpeg1);
758
759 for(i=0; i<64; i++)
760 {
761 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
762 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
763 }
764
765 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
766
767 /* build unified dc encoding tables */
768 for(i=-255; i<256; i++)
769 {
770 int adiff, index;
771 int bits, code;
772 int diff=i;
773
774 adiff = ABS(diff);
775 if(diff<0) diff--;
776 index = av_log2(2*adiff);
777
778 bits= vlc_dc_lum_bits[index] + index;
779 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
780 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
781
782 bits= vlc_dc_chroma_bits[index] + index;
783 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
784 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
785 }
786
787 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
788
789 for(f_code=1; f_code<=MAX_FCODE; f_code++){
790 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
791 int len;
792
793 if(mv==0) len= mbMotionVectorTable[0][1];
794 else{
795 int val, bit_size, range, code;
796
797 bit_size = f_code - 1;
798 range = 1 << bit_size;
799
800 val=mv;
801 if (val < 0)
802 val = -val;
803 val--;
804 code = (val >> bit_size) + 1;
805 if(code<17){
806 len= mbMotionVectorTable[code][1] + 1 + bit_size;
807 }else{
808 len= mbMotionVectorTable[16][1] + 2 + bit_size;
809 }
810 }
811
812 mv_penalty[f_code][mv+MAX_MV]= len;
813 }
814 }
815
816
817 for(f_code=MAX_FCODE; f_code>0; f_code--){
818 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
819 fcode_tab[mv+MAX_MV]= f_code;
820 }
821 }
822 }
823 s->me.mv_penalty= mv_penalty;
824 s->fcode_tab= fcode_tab;
825 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
826 s->min_qcoeff=-255;
827 s->max_qcoeff= 255;
828 }else{
829 s->min_qcoeff=-2047;
830 s->max_qcoeff= 2047;
831 }
832 s->intra_ac_vlc_length=
833 s->inter_ac_vlc_length=
834 s->intra_ac_vlc_last_length=
835 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
836 }
837
838 static inline void encode_dc(MpegEncContext *s, int diff, int component)
839 {
840 if(((unsigned) (diff+255)) >= 511){
841 int index;
842
843 if(diff<0){
844 index= av_log2_16bit(-2*diff);
845 diff--;
846 }else{
847 index= av_log2_16bit(2*diff);
848 }
849 if (component == 0) {
850 put_bits(
851 &s->pb,
852 vlc_dc_lum_bits[index] + index,
853 (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
854 }else{
855 put_bits(
856 &s->pb,
857 vlc_dc_chroma_bits[index] + index,
858 (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
859 }
860 }else{
861 if (component == 0) {
862 put_bits(
863 &s->pb,
864 mpeg1_lum_dc_uni[diff+255]&0xFF,
865 mpeg1_lum_dc_uni[diff+255]>>8);
866 } else {
867 put_bits(
868 &s->pb,
869 mpeg1_chr_dc_uni[diff+255]&0xFF,
870 mpeg1_chr_dc_uni[diff+255]>>8);
871 }
872 }
873 }
874
875 static void mpeg1_encode_block(MpegEncContext *s,
876 DCTELEM *block,
877 int n)
878 {
879 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
880 int code, component;
881 // RLTable *rl = &rl_mpeg1;
882
883 last_index = s->block_last_index[n];
884
885 /* DC coef */
886 if (s->mb_intra) {
887 component = (n <= 3 ? 0 : n - 4 + 1);
888 dc = block[0]; /* overflow is impossible */
889 diff = dc - s->last_dc[component];
890 encode_dc(s, diff, component);
891 s->last_dc[component] = dc;
892 i = 1;
893 /*
894 if (s->intra_vlc_format)
895 rl = &rl_mpeg2;
896 else
897 rl = &rl_mpeg1;
898 */
899 } else {
900 /* encode the first coefficient : needs to be done here because
901 it is handled slightly differently */
902 level = block[0];
903 if (abs(level) == 1) {
904 code = ((uint32_t)level >> 31); /* the sign bit */
905 put_bits(&s->pb, 2, code | 0x02);
906 i = 1;
907 } else {
908 i = 0;
909 last_non_zero = -1;
910 goto next_coef;
911 }
912 }
913
914 /* now quantify & encode AC coefs */
915 last_non_zero = i - 1;
916
917 for(;i<=last_index;i++) {
918 j = s->intra_scantable.permutated[i];
919 level = block[j];
920 next_coef:
921 #if 0
922 if (level != 0)
923 dprintf("level[%d]=%d\n", i, level);
924 #endif
925 /* encode using VLC */
926 if (level != 0) {
927 run = i - last_non_zero - 1;
928
929 alevel= level;
930 MASK_ABS(sign, alevel)
931 sign&=1;
932
933 // code = get_rl_index(rl, 0, run, alevel);
934 if (alevel <= mpeg1_max_level[0][run]){
935 code= mpeg1_index_run[0][run] + alevel - 1;
936 /* store the vlc & sign at once */
937 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
938 } else {
939 /* escape seems to be pretty rare <5% so i dont optimize it */
940 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
941 /* escape: only clip in this case */
942 put_bits(&s->pb, 6, run);
943 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
944 if (alevel < 128) {
945 put_bits(&s->pb, 8, level & 0xff);
946 } else {
947 if (level < 0) {
948 put_bits(&s->pb, 16, 0x8001 + level + 255);
949 } else {
950 put_bits(&s->pb, 16, level & 0xffff);
951 }
952 }
953 }else{
954 put_bits(&s->pb, 12, level & 0xfff);
955 }
956 }
957 last_non_zero = i;
958 }
959 }
960 /* end of block */
961 put_bits(&s->pb, 2, 0x2);
962 }
963 #endif //CONFIG_ENCODERS
964
965 /******************************************/
966 /* decoding */
967
968 static VLC dc_lum_vlc;
969 static VLC dc_chroma_vlc;
970 static VLC mv_vlc;
971 static VLC mbincr_vlc;
972 static VLC mb_ptype_vlc;
973 static VLC mb_btype_vlc;
974 static VLC mb_pat_vlc;
975
976 static void init_vlcs(void)
977 {
978 static int done = 0;
979
980 if (!done) {
981 done = 1;
982
983 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
984 vlc_dc_lum_bits, 1, 1,
985 vlc_dc_lum_code, 2, 2);
986 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
987 vlc_dc_chroma_bits, 1, 1,
988 vlc_dc_chroma_code, 2, 2);
989 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
990 &mbMotionVectorTable[0][1], 2, 1,
991 &mbMotionVectorTable[0][0], 2, 1);
992 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
993 &mbAddrIncrTable[0][1], 2, 1,
994 &mbAddrIncrTable[0][0], 2, 1);
995 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
996 &mbPatTable[0][1], 2, 1,
997 &mbPatTable[0][0], 2, 1);
998
999 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
1000 &table_mb_ptype[0][1], 2, 1,
1001 &table_mb_ptype[0][0], 2, 1);
1002 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
1003 &table_mb_btype[0][1], 2, 1,
1004 &table_mb_btype[0][0], 2, 1);
1005 init_rl(&rl_mpeg1);
1006 init_rl(&rl_mpeg2);
1007
1008 init_2d_vlc_rl(&rl_mpeg1);
1009 init_2d_vlc_rl(&rl_mpeg2);
1010 }
1011 }
1012
1013 static inline int get_dmv(MpegEncContext *s)
1014 {
1015 if(get_bits1(&s->gb))
1016 return 1 - (get_bits1(&s->gb) << 1);
1017 else
1018 return 0;
1019 }
1020
1021 static inline int get_qscale(MpegEncContext *s)
1022 {
1023 int qscale = get_bits(&s->gb, 5);
1024 if (s->q_scale_type) {
1025 return non_linear_qscale[qscale];
1026 } else {
1027 return qscale << 1;
1028 }
1029 }
1030
1031 /* motion type (for mpeg2) */
1032 #define MT_FIELD 1
1033 #define MT_FRAME 2
1034 #define MT_16X8 2
1035 #define MT_DMV 3
1036
1037 static int mpeg_decode_mb(MpegEncContext *s,
1038 DCTELEM block[12][64])
1039 {
1040 int i, j, k, cbp, val, mb_type, motion_type;
1041
1042 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1043
1044 assert(s->mb_skiped==0);
1045
1046 if (s->mb_skip_run-- != 0) {
1047 if(s->pict_type == I_TYPE){
1048 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1049 return -1;
1050 }
1051
1052 /* skip mb */
1053 s->mb_intra = 0;
1054 for(i=0;i<12;i++)
1055 s->block_last_index[i] = -1;
1056 if(s->picture_structure == PICT_FRAME)
1057 s->mv_type = MV_TYPE_16X16;
1058 else
1059 s->mv_type = MV_TYPE_FIELD;
1060 if (s->pict_type == P_TYPE) {
1061 /* if P type, zero motion vector is implied */
1062 s->mv_dir = MV_DIR_FORWARD;
1063 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1064 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1065 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1066 s->field_select[0][0]= s->picture_structure - 1;
1067 s->mb_skiped = 1;
1068 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1069 } else {
1070 /* if B type, reuse previous vectors and directions */
1071 s->mv[0][0][0] = s->last_mv[0][0][0];
1072 s->mv[0][0][1] = s->last_mv[0][0][1];
1073 s->mv[1][0][0] = s->last_mv[1][0][0];
1074 s->mv[1][0][1] = s->last_mv[1][0][1];
1075
1076 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1077 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1078 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1079
1080 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1081 s->mb_skiped = 1;
1082 }
1083
1084 return 0;
1085 }
1086
1087 switch(s->pict_type) {
1088 default:
1089 case I_TYPE:
1090 if (get_bits1(&s->gb) == 0) {
1091 if (get_bits1(&s->gb) == 0){
1092 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1093 return -1;
1094 }
1095 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1096 } else {
1097 mb_type = MB_TYPE_INTRA;
1098 }
1099 break;
1100 case P_TYPE:
1101 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1102 if (mb_type < 0){
1103 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1104 return -1;
1105 }
1106 mb_type = ptype2mb_type[ mb_type ];
1107 break;
1108 case B_TYPE:
1109 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1110 if (mb_type < 0){
1111 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1112 return -1;
1113 }
1114 mb_type = btype2mb_type[ mb_type ];
1115 break;
1116 }
1117 dprintf("mb_type=%x\n", mb_type);
1118 // motion_type = 0; /* avoid warning */
1119 if (IS_INTRA(mb_type)) {
1120 /* compute dct type */
1121 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1122 !s->frame_pred_frame_dct) {
1123 s->interlaced_dct = get_bits1(&s->gb);
1124 }
1125
1126 if (IS_QUANT(mb_type))
1127 s->qscale = get_qscale(s);
1128
1129 if (s->concealment_motion_vectors) {
1130 /* just parse them */
1131 if (s->picture_structure != PICT_FRAME)
1132 skip_bits1(&s->gb); /* field select */
1133
1134 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1135 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1136 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1137 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1138
1139 skip_bits1(&s->gb); /* marker */
1140 }else
1141 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1142 s->mb_intra = 1;
1143 #ifdef HAVE_XVMC
1144 //one 1 we memcpy blocks in xvmcvideo
1145 if(s->avctx->xvmc_acceleration > 1){
1146 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1147 if(s->swap_uv){
1148 exchange_uv(s);
1149 }
1150 }
1151 #endif
1152
1153 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1154 for(i=0;i<4+(1<<s->chroma_format);i++) {
1155 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1156 return -1;
1157 }
1158 } else {
1159 for(i=0;i<6;i++) {
1160 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1161 return -1;
1162 }
1163 }
1164 } else {
1165 if (mb_type & MB_TYPE_ZERO_MV){
1166 assert(mb_type & MB_TYPE_CBP);
1167
1168 /* compute dct type */
1169 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1170 !s->frame_pred_frame_dct) {
1171 s->interlaced_dct = get_bits1(&s->gb);
1172 }
1173
1174 if (IS_QUANT(mb_type))
1175 s->qscale = get_qscale(s);
1176
1177 s->mv_dir = MV_DIR_FORWARD;
1178 if(s->picture_structure == PICT_FRAME)
1179 s->mv_type = MV_TYPE_16X16;
1180 else{
1181 s->mv_type = MV_TYPE_FIELD;
1182 mb_type |= MB_TYPE_INTERLACED;
1183 s->field_select[0][0]= s->picture_structure - 1;
1184 }
1185 s->last_mv[0][0][0] = 0;
1186 s->last_mv[0][0][1] = 0;
1187 s->last_mv[0][1][0] = 0;
1188 s->last_mv[0][1][1] = 0;
1189 s->mv[0][0][0] = 0;
1190 s->mv[0][0][1] = 0;
1191 }else{
1192 assert(mb_type & MB_TYPE_L0L1);
1193 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1194 /* get additionnal motion vector type */
1195 if (s->frame_pred_frame_dct)
1196 motion_type = MT_FRAME;
1197 else{
1198 motion_type = get_bits(&s->gb, 2);
1199 }
1200
1201 /* compute dct type */
1202 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1203 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1204 s->interlaced_dct = get_bits1(&s->gb);
1205 }
1206
1207 if (IS_QUANT(mb_type))
1208 s->qscale = get_qscale(s);
1209
1210 /* motion vectors */
1211 s->mv_dir = 0;
1212 for(i=0;i<2;i++) {
1213 if (USES_LIST(mb_type, i)) {
1214 s->mv_dir |= (MV_DIR_FORWARD >> i);
1215 dprintf("motion_type=%d\n", motion_type);
1216 switch(motion_type) {
1217 case MT_FRAME: /* or MT_16X8 */
1218 if (s->picture_structure == PICT_FRAME) {
1219 /* MT_FRAME */
1220 mb_type |= MB_TYPE_16x16;
1221 s->mv_type = MV_TYPE_16X16;
1222 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1223 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1224 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1225 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1226 /* full_pel: only for mpeg1 */
1227 if (s->full_pel[i]){
1228 s->mv[i][0][0] <<= 1;
1229 s->mv[i][0][1] <<= 1;
1230 }
1231 } else {
1232 /* MT_16X8 */
1233 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1234 s->mv_type = MV_TYPE_16X8;
1235 for(j=0;j<2;j++) {
1236 s->field_select[i][j] = get_bits1(&s->gb);
1237 for(k=0;k<2;k++) {
1238 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1239 s->last_mv[i][j][k]);
1240 s->last_mv[i][j][k] = val;
1241 s->mv[i][j][k] = val;
1242 }
1243 }
1244 }
1245 break;
1246 case MT_FIELD:
1247 s->mv_type = MV_TYPE_FIELD;
1248 if (s->picture_structure == PICT_FRAME) {
1249 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1250 for(j=0;j<2;j++) {
1251 s->field_select[i][j] = get_bits1(&s->gb);
1252 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1253 s->last_mv[i][j][0]);
1254 s->last_mv[i][j][0] = val;
1255 s->mv[i][j][0] = val;
1256 dprintf("fmx=%d\n", val);
1257 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1258 s->last_mv[i][j][1] >> 1);
1259 s->last_mv[i][j][1] = val << 1;
1260 s->mv[i][j][1] = val;
1261 dprintf("fmy=%d\n", val);
1262 }
1263 } else {
1264 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1265 s->field_select[i][0] = get_bits1(&s->gb);
1266 for(k=0;k<2;k++) {
1267 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1268 s->last_mv[i][0][k]);
1269 s->last_mv[i][0][k] = val;
1270 s->last_mv[i][1][k] = val;
1271 s->mv[i][0][k] = val;
1272 }
1273 }
1274 break;
1275 case MT_DMV:
1276 {
1277 int dmx, dmy, mx, my, m;
1278
1279 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1280 s->last_mv[i][0][0]);
1281 s->last_mv[i][0][0] = mx;
1282 s->last_mv[i][1][0] = mx;
1283 dmx = get_dmv(s);
1284 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1285 s->last_mv[i][0][1] >> 1);
1286 dmy = get_dmv(s);
1287 s->mv_type = MV_TYPE_DMV;
1288
1289
1290 s->last_mv[i][0][1] = my<<1;
1291 s->last_mv[i][1][1] = my<<1;
1292
1293 s->mv[i][0][0] = mx;
1294 s->mv[i][0][1] = my;
1295 s->mv[i][1][0] = mx;//not used
1296 s->mv[i][1][1] = my;//not used
1297
1298 if (s->picture_structure == PICT_FRAME) {
1299 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1300
1301 //m = 1 + 2 * s->top_field_first;
1302 m = s->top_field_first ? 1 : 3;
1303
1304 /* top -> top pred */
1305 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1306 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1307 m = 4 - m;
1308 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1309 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1310 } else {
1311 mb_type |= MB_TYPE_16x16;
1312
1313 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1314 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1315 if(s->picture_structure == PICT_TOP_FIELD)
1316 s->mv[i][2][1]--;
1317 else
1318 s->mv[i][2][1]++;
1319 }
1320 }
1321 break;
1322 default:
1323 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1324 return -1;
1325 }
1326 }
1327 }
1328 }
1329
1330 s->mb_intra = 0;
1331
1332 if (HAS_CBP(mb_type)) {
1333 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1334 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
1335 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1336 return -1;
1337 }
1338 if(s->chroma_format == 2){//CHROMA422
1339 cbp|= ( get_bits(&s->gb,2) ) << 6;
1340 }else
1341 if(s->chroma_format > 2){//CHROMA444
1342 cbp|= ( get_bits(&s->gb,6) ) << 6;
1343 }
1344
1345 #ifdef HAVE_XVMC
1346 //on 1 we memcpy blocks in xvmcvideo
1347 if(s->avctx->xvmc_acceleration > 1){
1348 XVMC_pack_pblocks(s,cbp);
1349 if(s->swap_uv){
1350 exchange_uv(s);
1351 }
1352 }
1353 #endif
1354
1355 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1356 for(i=0;i<6;i++) {
1357 if (cbp & (1<<(5-i)) ) {
1358 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1359 return -1;
1360 } else {
1361 s->block_last_index[i] = -1;
1362 }
1363 }
1364 if (s->chroma_format >= 2) {
1365 if (s->chroma_format == 2) {//CHROMA_422)
1366 for(i=6;i<8;i++) {
1367 if (cbp & (1<<(6+7-i)) ) {
1368 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1369 return -1;
1370 } else {
1371 s->block_last_index[i] = -1;
1372 }
1373 }
1374 }else{ /*CHROMA_444*/
1375 for(i=6;i<12;i++) {
1376 if (cbp & (1<<(6+11-i)) ) {
1377 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1378 return -1;
1379 } else {
1380 s->block_last_index[i] = -1;
1381 }
1382 }
1383 }
1384 }
1385 } else {
1386 for(i=0;i<6;i++) {
1387 if (cbp & 32) {
1388 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1389 return -1;
1390 } else {
1391 s->block_last_index[i] = -1;
1392 }
1393 cbp+=cbp;
1394 }
1395 }
1396 }else{
1397 for(i=0;i<6;i++)
1398 s->block_last_index[i] = -1;
1399 }
1400 }
1401
1402 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1403
1404 return 0;
1405 }
1406
1407 /* as h263, but only 17 codes */
1408 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1409 {
1410 int code, sign, val, l, shift;
1411
1412 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1413 if (code == 0) {
1414 return pred;
1415 }
1416 if (code < 0) {
1417 return 0xffff;
1418 }
1419
1420 sign = get_bits1(&s->gb);
1421 shift = fcode - 1;
1422 val = code;
1423 if (shift) {
1424 val = (val - 1) << shift;
1425 val |= get_bits(&s->gb, shift);
1426 val++;
1427 }
1428 if (sign)
1429 val = -val;
1430 val += pred;
1431
1432 /* modulo decoding */
1433 l = 1 << (shift+4);
1434 val = ((val + l)&(l*2-1)) - l;
1435 return val;
1436 }
1437
1438 static inline int decode_dc(GetBitContext *gb, int component)
1439 {
1440 int code, diff;
1441
1442 if (component == 0) {
1443 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1444 } else {
1445 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1446 }
1447 if (code < 0){
1448 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1449 return 0xffff;
1450 }
1451 if (code == 0) {
1452 diff = 0;
1453 } else {
1454 diff = get_xbits(gb, code);
1455 }
1456 return diff;
1457 }
1458
1459 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1460 DCTELEM *block,
1461 int n)
1462 {
1463 int level, dc, diff, i, j, run;
1464 int component;
1465 RLTable *rl = &rl_mpeg1;
1466 uint8_t * const scantable= s->intra_scantable.permutated;
1467 const uint16_t *quant_matrix= s->intra_matrix;
1468 const int qscale= s->qscale;
1469
1470 /* DC coef */
1471 component = (n <= 3 ? 0 : n - 4 + 1);
1472 diff = decode_dc(&s->gb, component);
1473 if (diff >= 0xffff)
1474 return -1;
1475 dc = s->last_dc[component];
1476 dc += diff;
1477 s->last_dc[component] = dc;
1478 block[0] = dc<<3;
1479 dprintf("dc=%d diff=%d\n", dc, diff);
1480 i = 0;
1481 {
1482 OPEN_READER(re, &s->gb);
1483 /* now quantify & encode AC coefs */
1484 for(;;) {
1485 UPDATE_CACHE(re, &s->gb);
1486 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1487
1488 if(level == 127){
1489 break;
1490 } else if(level != 0) {
1491 i += run;
1492 j = scantable[i];
1493 level= (level*qscale*quant_matrix[j])>>4;
1494 level= (level-1)|1;
1495 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1496 LAST_SKIP_BITS(re, &s->gb, 1);
1497 } else {
1498 /* escape */
1499 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1500 UPDATE_CACHE(re, &s->gb);
1501 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1502 if (level == -128) {
1503 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1504 } else if (level == 0) {
1505 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1506 }
1507 i += run;
1508 j = scantable[i];
1509 if(level<0){
1510 level= -level;
1511 level= (level*qscale*quant_matrix[j])>>4;
1512 level= (level-1)|1;
1513 level= -level;
1514 }else{
1515 level= (level*qscale*quant_matrix[j])>>4;
1516 level= (level-1)|1;
1517 }
1518 }
1519 if (i > 63){
1520 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1521 return -1;
1522 }
1523
1524 block[j] = level;
1525 }
1526 CLOSE_READER(re, &s->gb);
1527 }
1528 s->block_last_index[n] = i;
1529 return 0;
1530 }
1531
1532 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1533 DCTELEM *block,
1534 int n)
1535 {
1536 int level, i, j, run;
1537 RLTable *rl = &rl_mpeg1;
1538 uint8_t * const scantable= s->intra_scantable.permutated;
1539 const uint16_t *quant_matrix= s->inter_matrix;
1540 const int qscale= s->qscale;
1541
1542 {
1543 int v;
1544 OPEN_READER(re, &s->gb);
1545 i = -1;
1546 /* special case for the first coef. no need to add a second vlc table */
1547 UPDATE_CACHE(re, &s->gb);
1548 v= SHOW_UBITS(re, &s->gb, 2);
1549 if (v & 2) {
1550 LAST_SKIP_BITS(re, &s->gb, 2);
1551 level= (3*qscale*quant_matrix[0])>>5;
1552 level= (level-1)|1;
1553 if(v&1)
1554 level= -level;
1555 block[0] = level;
1556 i++;
1557 }
1558
1559 /* now quantify & encode AC coefs */
1560 for(;;) {
1561 UPDATE_CACHE(re, &s->gb);
1562 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1563
1564 if(level == 127){
1565 break;
1566 } else if(level != 0) {
1567 i += run;
1568 j = scantable[i];
1569 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1570 level= (level-1)|1;
1571 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1572 LAST_SKIP_BITS(re, &s->gb, 1);
1573 } else {
1574 /* escape */
1575 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1576 UPDATE_CACHE(re, &s->gb);
1577 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1578 if (level == -128) {
1579 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1580 } else if (level == 0) {
1581 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1582 }
1583 i += run;
1584 j = scantable[i];
1585 if(level<0){
1586 level= -level;
1587 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1588 level= (level-1)|1;
1589 level= -level;
1590 }else{
1591 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1592 level= (level-1)|1;
1593 }
1594 }
1595 if (i > 63){
1596 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1597 return -1;
1598 }
1599
1600 block[j] = level;
1601 }
1602 CLOSE_READER(re, &s->gb);
1603 }
1604 s->block_last_index[n] = i;
1605 return 0;
1606 }
1607
1608 /* Also does unquantization here, since I will never support mpeg2
1609 encoding */
1610 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1611 DCTELEM *block,
1612 int n)
1613 {
1614 int level, i, j, run;
1615 RLTable *rl = &rl_mpeg1;
1616 uint8_t * const scantable= s->intra_scantable.permutated;
1617 const uint16_t *quant_matrix;
1618 const int qscale= s->qscale;
1619 int mismatch;
1620
1621 mismatch = 1;
1622
1623 {
1624 int v;
1625 OPEN_READER(re, &s->gb);
1626 i = -1;
1627 if (n < 4)
1628 quant_matrix = s->inter_matrix;
1629 else
1630 quant_matrix = s->chroma_inter_matrix;
1631
1632 /* special case for the first coef. no need to add a second vlc table */
1633 UPDATE_CACHE(re, &s->gb);
1634 v= SHOW_UBITS(re, &s->gb, 2);
1635 if (v & 2) {
1636 LAST_SKIP_BITS(re, &s->gb, 2);
1637 level= (3*qscale*quant_matrix[0])>>5;
1638 if(v&1)
1639 level= -level;
1640 block[0] = level;
1641 mismatch ^= level;
1642 i++;
1643 }
1644
1645 /* now quantify & encode AC coefs */
1646 for(;;) {
1647 UPDATE_CACHE(re, &s->gb);
1648 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1649
1650 if(level == 127){
1651 break;
1652 } else if(level != 0) {
1653 i += run;
1654 j = scantable[i];
1655 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1656 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1657 LAST_SKIP_BITS(re, &s->gb, 1);
1658 } else {
1659 /* escape */
1660 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1661 UPDATE_CACHE(re, &s->gb);
1662 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1663
1664 i += run;
1665 j = scantable[i];
1666 if(level<0){
1667 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1668 level= -level;
1669 }else{
1670 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1671 }
1672 }
1673 if (i > 63){
1674 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1675 return -1;
1676 }
1677
1678 mismatch ^= level;
1679 block[j] = level;
1680 }
1681 CLOSE_READER(re, &s->gb);
1682 }
1683 block[63] ^= (mismatch & 1);
1684
1685 s->block_last_index[n] = i;
1686 return 0;
1687 }
1688
1689 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1690 DCTELEM *block,
1691 int n)
1692 {
1693 int level, dc, diff, i, j, run;
1694 int component;
1695 RLTable *rl;
1696 uint8_t * const scantable= s->intra_scantable.permutated;
1697 const uint16_t *quant_matrix;
1698 const int qscale= s->qscale;
1699 int mismatch;
1700
1701 /* DC coef */
1702 if (n < 4){
1703 quant_matrix = s->intra_matrix;
1704 component = 0;
1705 }else{
1706 quant_matrix = s->chroma_intra_matrix;
1707 component = (n&1) + 1;
1708 }
1709 diff = decode_dc(&s->gb, component);
1710 if (diff >= 0xffff)
1711 return -1;
1712 dc = s->last_dc[component];
1713 dc += diff;
1714 s->last_dc[component] = dc;
1715 block[0] = dc << (3 - s->intra_dc_precision);
1716 dprintf("dc=%d\n", block[0]);
1717 mismatch = block[0] ^ 1;
1718 i = 0;
1719 if (s->intra_vlc_format)
1720 rl = &rl_mpeg2;
1721 else
1722 rl = &rl_mpeg1;
1723
1724 {
1725 OPEN_READER(re, &s->gb);
1726 /* now quantify & encode AC coefs */
1727 for(;;) {
1728 UPDATE_CACHE(re, &s->gb);
1729 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1730
1731 if(level == 127){
1732 break;
1733 } else if(level != 0) {
1734 i += run;
1735 j = scantable[i];
1736 level= (level*qscale*quant_matrix[j])>>4;
1737 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1738 LAST_SKIP_BITS(re, &s->gb, 1);
1739 } else {
1740 /* escape */
1741 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1742 UPDATE_CACHE(re, &s->gb);
1743 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1744 i += run;
1745 j = scantable[i];
1746 if(level<0){
1747 level= (-level*qscale*quant_matrix[j])>>4;
1748 level= -level;
1749 }else{
1750 level= (level*qscale*quant_matrix[j])>>4;
1751 }
1752 }
1753 if (i > 63){
1754 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1755 return -1;
1756 }
1757
1758 mismatch^= level;
1759 block[j] = level;
1760 }
1761 CLOSE_READER(re, &s->gb);
1762 }
1763 block[63]^= mismatch&1;
1764
1765 s->block_last_index[n] = i;
1766 return 0;
1767 }
1768
1769 typedef struct Mpeg1Context {
1770 MpegEncContext mpeg_enc_ctx;
1771 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1772 int repeat_field; /* true if we must repeat the field */
1773 AVPanScan pan_scan; /** some temporary storage for the panscan */
1774 int slice_count;
1775 int swap_uv;//indicate VCR2
1776 int save_aspect_info;
1777
1778 } Mpeg1Context;
1779
1780 static int mpeg_decode_init(AVCodecContext *avctx)
1781 {
1782 Mpeg1Context *s = avctx->priv_data;
1783 MpegEncContext *s2 = &s->mpeg_enc_ctx;
1784 int i;
1785
1786 //we need some parmutation to store
1787 //matrixes, until MPV_common_init()
1788 //set the real permutatuon
1789 for(i=0;i<64;i++)
1790 s2->dsp.idct_permutation[i]=i;
1791
1792 MPV_decode_defaults(s2);
1793
1794 s->mpeg_enc_ctx.avctx= avctx;
1795 s->mpeg_enc_ctx.flags= avctx->flags;
1796 s->mpeg_enc_ctx.flags2= avctx->flags2;
1797 common_init(&s->mpeg_enc_ctx);
1798 init_vlcs();
1799
1800 s->mpeg_enc_ctx_allocated = 0;
1801 s->mpeg_enc_ctx.picture_number = 0;
1802 s->repeat_field = 0;
1803 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1804 return 0;
1805 }
1806
1807 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
1808 const uint8_t *new_perm){
1809 uint16_t temp_matrix[64];
1810 int i;
1811
1812 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
1813
1814 for(i=0;i<64;i++){
1815 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
1816 }
1817 }
1818
1819 //Call this function when we know all parameters
1820 //it may be called in different places for mpeg1 and mpeg2
1821 static int mpeg_decode_postinit(AVCodecContext *avctx){
1822 Mpeg1Context *s1 = avctx->priv_data;
1823 MpegEncContext *s = &s1->mpeg_enc_ctx;
1824 uint8_t old_permutation[64];
1825
1826
1827 if (
1828 (s1->mpeg_enc_ctx_allocated == 0)||
1829 avctx->width != s->width ||
1830 avctx->height != s->height||
1831 // s1->save_aspect_info != avctx->aspect_ratio_info||
1832 0)
1833 {
1834
1835 if (s1->mpeg_enc_ctx_allocated) {
1836 MPV_common_end(s);
1837 }
1838
1839 if( (s->width == 0 )||(s->height == 0))
1840 return -2;
1841
1842 avctx->width = s->width;
1843 avctx->height = s->height;
1844 avctx->bit_rate = s->bit_rate;
1845 s1->save_aspect_info = s->aspect_ratio_info;
1846
1847 //low_delay may be forced, in this case we will have B frames
1848 //that behave like P frames
1849 avctx->has_b_frames = !(s->low_delay);
1850
1851 if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
1852 //mpeg1 fps
1853 avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
1854 avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
1855 //mpeg1 aspect
1856 avctx->sample_aspect_ratio= av_d2q(
1857 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
1858
1859 }else{//mpeg2
1860 //mpeg2 fps
1861 av_reduce(
1862 &s->avctx->frame_rate,
1863 &s->avctx->frame_rate_base,
1864 frame_rate_tab[s->frame_rate_index].num * (s->frame_rate_ext_n+1),
1865 frame_rate_tab[s->frame_rate_index].den * (s->frame_rate_ext_d+1),
1866 1<<30);
1867 //mpeg2 aspect
1868 if(s->aspect_ratio_info > 1){
1869 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
1870 s->avctx->sample_aspect_ratio=
1871 av_div_q(
1872 mpeg2_aspect[s->aspect_ratio_info],
1873 (AVRational){s->width, s->height}
1874 );
1875 }else{
1876 s->avctx->sample_aspect_ratio=
1877 av_div_q(
1878 mpeg2_aspect[s->aspect_ratio_info],
1879 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
1880 );
1881 }
1882 }else{
1883 s->avctx->sample_aspect_ratio=
1884 mpeg2_aspect[s->aspect_ratio_info];
1885 }
1886 }//mpeg2
1887
1888 if(avctx->xvmc_acceleration){
1889 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
1890 }else{
1891 if(s->chroma_format < 2){
1892 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
1893 }else
1894 if(s->chroma_format == 2){
1895 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
1896 }else
1897 if(s->chroma_format > 2){
1898 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
1899 }
1900 }
1901 //until then pix_fmt may be changed right after codec init
1902 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
1903 if( avctx->idct_algo == FF_IDCT_AUTO )
1904 avctx->idct_algo = FF_IDCT_SIMPLE;
1905
1906 //quantization matrixes may need reordering
1907 //if dct permutation is changed
1908 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
1909
1910 if (MPV_common_init(s) < 0)
1911 return -2;
1912
1913 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
1914 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
1915 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
1916 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
1917
1918 s1->mpeg_enc_ctx_allocated = 1;
1919 }
1920 return 0;
1921 }
1922
1923 /* return the 8 bit start code value and update the search
1924 state. Return -1 if no start code found */
1925 static int find_start_code(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
1926 {
1927 const uint8_t *buf_ptr= *pbuf_ptr;
1928
1929 buf_ptr++; //gurantees that -1 is within the array
1930 buf_end -= 2; // gurantees that +2 is within the array
1931
1932 while (buf_ptr < buf_end) {
1933 if(*buf_ptr==0){
1934 while(buf_ptr < buf_end && buf_ptr[1]==0)
1935 buf_ptr++;
1936
1937 if(buf_ptr[-1] == 0 && buf_ptr[1] == 1){
1938 *pbuf_ptr = buf_ptr+3;
1939 return buf_ptr[2] + 0x100;
1940 }
1941 }
1942 buf_ptr += 2;
1943 }
1944 buf_end += 2; //undo the hack above
1945
1946 *pbuf_ptr = buf_end;
1947 return -1;
1948 }
1949
1950 static int mpeg1_decode_picture(AVCodecContext *avctx,
1951 const uint8_t *buf, int buf_size)
1952 {
1953 Mpeg1Context *s1 = avctx->priv_data;
1954 MpegEncContext *s = &s1->mpeg_enc_ctx;
1955 int ref, f_code, vbv_delay;
1956
1957 if(mpeg_decode_postinit(s->avctx) < 0)
1958 return -2;
1959
1960 init_get_bits(&s->gb, buf, buf_size*8);
1961
1962 ref = get_bits(&s->gb, 10); /* temporal ref */
1963 s->pict_type = get_bits(&s->gb, 3);
1964
1965 vbv_delay= get_bits(&s->gb, 16);
1966 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
1967 s->full_pel[0] = get_bits1(&s->gb);
1968 f_code = get_bits(&s->gb, 3);
1969 if (f_code == 0)
1970 return -1;
1971 s->mpeg_f_code[0][0] = f_code;
1972 s->mpeg_f_code[0][1] = f_code;
1973 }
1974 if (s->pict_type == B_TYPE) {
1975 s->full_pel[1] = get_bits1(&s->gb);
1976 f_code = get_bits(&s->gb, 3);
1977 if (f_code == 0)
1978 return -1;
1979 s->mpeg_f_code[1][0] = f_code;
1980 s->mpeg_f_code[1][1] = f_code;
1981 }
1982 s->current_picture.pict_type= s->pict_type;
1983 s->current_picture.key_frame= s->pict_type == I_TYPE;
1984
1985 // if(avctx->debug & FF_DEBUG_PICT_INFO)
1986 // av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d\n", vbv_delay, ref);
1987
1988 s->y_dc_scale = 8;
1989 s->c_dc_scale = 8;
1990 s->first_slice = 1;
1991 return 0;
1992 }
1993
1994 static void mpeg_decode_sequence_extension(MpegEncContext *s)
1995 {
1996 int horiz_size_ext, vert_size_ext;
1997 int bit_rate_ext;
1998 int level, profile;
1999
2000 skip_bits(&s->gb, 1); /* profil and level esc*/
2001 profile= get_bits(&s->gb, 3);
2002 level= get_bits(&s->gb, 4);
2003 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
2004 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
2005 horiz_size_ext = get_bits(&s->gb, 2);
2006 vert_size_ext = get_bits(&s->gb, 2);
2007 s->width |= (horiz_size_ext << 12);
2008 s->height |= (vert_size_ext << 12);
2009 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
2010 s->bit_rate += (bit_rate_ext << 12) * 400;
2011 skip_bits1(&s->gb); /* marker */
2012 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
2013
2014 s->low_delay = get_bits1(&s->gb);
2015 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2016
2017 s->frame_rate_ext_n = get_bits(&s->gb, 2);
2018 s->frame_rate_ext_d = get_bits(&s->gb, 5);
2019
2020 dprintf("sequence extension\n");
2021 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2022 s->avctx->sub_id = 2; /* indicates mpeg2 found */
2023
2024 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2025 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
2026 profile, level, s->avctx->rc_buffer_size, s->bit_rate);
2027
2028 }
2029
2030 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
2031 {
2032 MpegEncContext *s= &s1->mpeg_enc_ctx;
2033 int color_description, w, h;
2034
2035 skip_bits(&s->gb, 3); /* video format */
2036 color_description= get_bits1(&s->gb);
2037 if(color_description){
2038 skip_bits(&s->gb, 8); /* color primaries */
2039 skip_bits(&s->gb, 8); /* transfer_characteristics */
2040 skip_bits(&s->gb, 8); /* matrix_coefficients */
2041 }
2042 w= get_bits(&s->gb, 14);
2043 skip_bits(&s->gb, 1); //marker
2044 h= get_bits(&s->gb, 14);
2045 skip_bits(&s->gb, 1); //marker
2046
2047 s1->pan_scan.width= 16*w;
2048 s1->pan_scan.height=16*h;
2049
2050 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2051 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
2052 }
2053
2054 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
2055 {
2056 MpegEncContext *s= &s1->mpeg_enc_ctx;
2057 int i,nofco;
2058
2059 nofco = 1;
2060 if(s->progressive_sequence){
2061 if(s->repeat_first_field){
2062 nofco++;
2063 if(s->top_field_first)
2064 nofco++;
2065 }
2066 }else{
2067 if(s->picture_structure == PICT_FRAME){
2068 nofco++;
2069 if(s->repeat_first_field)
2070 nofco++;
2071 }
2072 }
2073 for(i=0; i<nofco; i++){
2074 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
2075 skip_bits(&s->gb, 1); //marker
2076 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
2077 skip_bits(&s->gb, 1); //marker
2078 }
2079
2080 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2081 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
2082 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
2083 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
2084 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
2085 );
2086 }
2087
2088 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
2089 {
2090 int i, v, j;
2091
2092 dprintf("matrix extension\n");
2093
2094 if (get_bits1(&s->gb)) {
2095 for(i=0;i<64;i++) {
2096 v = get_bits(&s->gb, 8);
2097 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2098 s->intra_matrix[j] = v;
2099 s->chroma_intra_matrix[j] = v;
2100 }
2101 }
2102 if (get_bits1(&s->gb)) {
2103 for(i=0;i<64;i++) {
2104 v = get_bits(&s->gb, 8);
2105 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2106 s->inter_matrix[j] = v;
2107 s->chroma_inter_matrix[j] = v;
2108 }
2109 }
2110 if (get_bits1(&s->gb)) {
2111 for(i=0;i<64;i++) {
2112 v = get_bits(&s->gb, 8);
2113 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2114 s->chroma_intra_matrix[j] = v;
2115 }
2116 }
2117 if (get_bits1(&s->gb)) {
2118 for(i=0;i<64;i++) {
2119 v = get_bits(&s->gb, 8);
2120 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2121 s->chroma_inter_matrix[j] = v;
2122 }
2123 }
2124 }
2125
2126 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
2127 {
2128 s->full_pel[0] = s->full_pel[1] = 0;
2129 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
2130 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
2131 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
2132 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
2133 s->intra_dc_precision = get_bits(&s->gb, 2);
2134 s->picture_structure = get_bits(&s->gb, 2);
2135 s->top_field_first = get_bits1(&s->gb);
2136 s->frame_pred_frame_dct = get_bits1(&s->gb);
2137 s->concealment_motion_vectors = get_bits1(&s->gb);
2138 s->q_scale_type = get_bits1(&s->gb);
2139 s->intra_vlc_format = get_bits1(&s->gb);
2140 s->alternate_scan = get_bits1(&s->gb);
2141 s->repeat_first_field = get_bits1(&s->gb);
2142 s->chroma_420_type = get_bits1(&s->gb);
2143 s->progressive_frame = get_bits1(&s->gb);
2144
2145 if(s->picture_structure == PICT_FRAME)
2146 s->first_field=0;
2147 else{
2148 s->first_field ^= 1;
2149 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
2150 }
2151
2152 if(s->alternate_scan){
2153 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2154 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
2155 }else{
2156 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2157 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
2158 }
2159
2160 /* composite display not parsed */
2161 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
2162 dprintf("picture_structure=%d\n", s->picture_structure);
2163 dprintf("top field first=%d\n", s->top_field_first);
2164 dprintf("repeat first field=%d\n", s->repeat_first_field);
2165 dprintf("conceal=%d\n", s->concealment_motion_vectors);
2166 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
2167 dprintf("alternate_scan=%d\n", s->alternate_scan);
2168 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2169 dprintf("progressive_frame=%d\n", s->progressive_frame);
2170 }
2171
2172 static void mpeg_decode_extension(AVCodecContext *avctx,
2173 const uint8_t *buf, int buf_size)
2174 {
2175 Mpeg1Context *s1 = avctx->priv_data;
2176 MpegEncContext *s = &s1->mpeg_enc_ctx;
2177 int ext_type;
2178
2179 init_get_bits(&s->gb, buf, buf_size*8);
2180
2181 ext_type = get_bits(&s->gb, 4);
2182 switch(ext_type) {
2183 case 0x1:
2184 mpeg_decode_sequence_extension(s);
2185 break;
2186 case 0x2:
2187 mpeg_decode_sequence_display_extension(s1);
2188 break;
2189 case 0x3:
2190 mpeg_decode_quant_matrix_extension(s);
2191 break;
2192 case 0x7:
2193 mpeg_decode_picture_display_extension(s1);
2194 break;
2195 case 0x8:
2196 mpeg_decode_picture_coding_extension(s);
2197 break;
2198 }
2199 }
2200
2201 static void exchange_uv(MpegEncContext *s){
2202 short * tmp;
2203
2204 tmp = s->pblocks[4];
2205 s->pblocks[4] = s->pblocks[5];
2206 s->pblocks[5] = tmp;
2207 }
2208
2209 static int mpeg_field_start(MpegEncContext *s){
2210 AVCodecContext *avctx= s->avctx;
2211 Mpeg1Context *s1 = (Mpeg1Context*)s;
2212
2213 /* start frame decoding */
2214 if(s->first_field || s->picture_structure==PICT_FRAME){
2215 if(MPV_frame_start(s, avctx) < 0)
2216 return -1;
2217
2218 ff_er_frame_start(s);
2219
2220 /* first check if we must repeat the frame */
2221 s->current_picture_ptr->repeat_pict = 0;
2222 if (s->repeat_first_field) {
2223 if (s->progressive_sequence) {
2224 if (s->top_field_first)
2225 s->current_picture_ptr->repeat_pict = 4;
2226 else
2227 s->current_picture_ptr->repeat_pict = 2;
2228 } else if (s->progressive_frame) {
2229 s->current_picture_ptr->repeat_pict = 1;
2230 }
2231 }
2232
2233 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2234 }else{ //second field
2235 int i;
2236
2237 if(!s->current_picture_ptr){
2238 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2239 return -1;
2240 }
2241
2242 for(i=0; i<4; i++){
2243 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2244 if(s->picture_structure == PICT_BOTTOM_FIELD){
2245 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2246 }
2247 }
2248 }
2249 #ifdef HAVE_XVMC
2250 // MPV_frame_start will call this function too,
2251 // but we need to call it on every field
2252 if(s->avctx->xvmc_acceleration)
2253 XVMC_field_start(s,avctx);
2254 #endif
2255
2256 return 0;
2257 }
2258
2259 #define DECODE_SLICE_ERROR -1
2260 #define DECODE_SLICE_OK 0
2261
2262 /**
2263 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2264 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2265 * DECODE_SLICE_OK if this slice is ok<br>
2266 */
2267 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
2268 const uint8_t **buf, int buf_size)
2269 {
2270 MpegEncContext *s = &s1->mpeg_enc_ctx;
2271 AVCodecContext *avctx= s->avctx;
2272 int ret;
2273 const int field_pic= s->picture_structure != PICT_FRAME;
2274
2275 s->resync_mb_x=
2276 s->resync_mb_y= -1;
2277
2278 if (mb_y<<field_pic >= s->mb_height){
2279 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
2280 return -1;
2281 }
2282
2283 init_get_bits(&s->gb, *buf, buf_size*8);
2284
2285 ff_mpeg1_clean_buffers(s);
2286 s->interlaced_dct = 0;
2287
2288 s->qscale = get_qscale(s);
2289
2290 if(s->qscale == 0){
2291 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2292 return -1;
2293 }
2294
2295 /* extra slice info */
2296 while (get_bits1(&s->gb) != 0) {
2297 skip_bits(&s->gb, 8);
2298 }
2299
2300 s->mb_x=0;
2301
2302 for(;;) {
2303 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2304 if (code < 0){
2305 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2306 return -1;
2307 }
2308 if (code >= 33) {
2309 if (code == 33) {
2310 s->mb_x += 33;
2311 }
2312 /* otherwise, stuffing, nothing to do */
2313 } else {
2314 s->mb_x += code;
2315 break;
2316 }
2317 }
2318
2319 s->resync_mb_x= s->mb_x;
2320 s->resync_mb_y= s->mb_y= mb_y;
2321 s->mb_skip_run= 0;
2322 ff_init_block_index(s);
2323
2324 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2325 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2326 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",
2327 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],
2328 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2329 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2330 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2331 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2332 }
2333 }
2334
2335 for(;;) {
2336 #ifdef HAVE_XVMC
2337 //one 1 we memcpy blocks in xvmcvideo
2338 if(s->avctx->xvmc_acceleration > 1)
2339 XVMC_init_block(s);//set s->block
2340 #endif
2341
2342 s->dsp.clear_blocks(s->block[0]);
2343
2344 ret = mpeg_decode_mb(s, s->block);
2345 s->chroma_qscale= s->qscale;
2346
2347 dprintf("ret=%d\n", ret);
2348 if (ret < 0)
2349 return -1;
2350
2351 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2352 const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
2353 int xy = s->mb_x*2 + s->mb_y*2*wrap;
2354 int motion_x, motion_y, dir, i;
2355 if(field_pic && !s->first_field)
2356 xy += wrap/2;
2357
2358 for(i=0; i<2; i++){
2359 for(dir=0; dir<2; dir++){
2360 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2361 motion_x = motion_y = 0;
2362 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
2363 motion_x = s->mv[dir][0][0];
2364 motion_y = s->mv[dir][0][1];
2365 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2366 motion_x = s->mv[dir][i][0];
2367 motion_y = s->mv[dir][i][1];
2368 }
2369
2370 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2371 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2372 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2373 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
2374 s->current_picture.ref_index [dir][xy ]=
2375 s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
2376 }
2377 xy += wrap;
2378 }
2379 }
2380
2381 s->dest[0] += 16;
2382 s->dest[1] += 8;
2383 s->dest[2] += 8;
2384
2385 MPV_decode_mb(s, s->block);
2386
2387 if (++s->mb_x >= s->mb_width) {
2388
2389 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2390
2391 s->mb_x = 0;
2392 s->mb_y++;
2393
2394 if(s->mb_y<<field_pic >= s->mb_height){
2395 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2396
2397 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2398 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2399 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
2400 return -1;
2401 }else
2402 goto eos;
2403 }
2404
2405 ff_init_block_index(s);
2406 }
2407
2408 /* skip mb handling */
2409 if (s->mb_skip_run == -1) {
2410 /* read again increment */
2411 s->mb_skip_run = 0;
2412 for(;;) {
2413 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2414 if (code < 0){
2415 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2416 return -1;
2417 }
2418 if (code >= 33) {
2419 if (code == 33) {
2420 s->mb_skip_run += 33;
2421 }else if(code == 35){
2422 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2423 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2424 return -1;
2425 }
2426 goto eos; /* end of slice */
2427 }
2428 /* otherwise, stuffing, nothing to do */
2429 } else {
2430 s->mb_skip_run += code;
2431 break;
2432 }
2433 }
2434 }
2435 }
2436 eos: // end of slice
2437 *buf += get_bits_count(&s->gb)/8 - 1;
2438 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2439 return 0;
2440 }
2441
2442 static int slice_decode_thread(AVCodecContext *c, void *arg){
2443 MpegEncContext *s= arg;
2444 const uint8_t *buf= s->gb.buffer;
2445 int mb_y= s->start_mb_y;
2446
2447 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2448
2449 for(;;){
2450 int start_code, ret;
2451
2452 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2453 emms_c();
2454 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2455 //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);
2456 if(ret < 0){
2457 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2458 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);
2459 }else{
2460 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);
2461 }
2462
2463 if(s->mb_y == s->end_mb_y)
2464 return 0;
2465
2466 start_code = find_start_code(&buf, s->gb.buffer_end);
2467 mb_y= start_code - SLICE_MIN_START_CODE;
2468 if(mb_y < 0 || mb_y >= s->end_mb_y)
2469 return -1;
2470 }
2471
2472 return 0; //not reached
2473 }
2474
2475 /**
2476 * handles slice ends.
2477 * @return 1 if it seems to be the last slice of
2478 */
2479 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2480 {
2481 Mpeg1Context *s1 = avctx->priv_data;
2482 MpegEncContext *s = &s1->mpeg_enc_ctx;
2483
2484 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2485 return 0;
2486
2487 #ifdef HAVE_XVMC
2488 if(s->avctx->xvmc_acceleration)
2489 XVMC_field_end(s);
2490 #endif
2491 /* end of slice reached */
2492 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2493 /* end of image */
2494
2495 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2496
2497 ff_er_frame_end(s);
2498
2499 MPV_frame_end(s);
2500
2501 if (s->pict_type == B_TYPE || s->low_delay) {
2502 *pict= *(AVFrame*)s->current_picture_ptr;
2503 ff_print_debug_info(s, pict);
2504 } else {
2505 s->picture_number++;
2506 /* latency of 1 frame for I and P frames */
2507 /* XXX: use another variable than picture_number */
2508 if (s->last_picture_ptr != NULL) {
2509 *pict= *(AVFrame*)s->last_picture_ptr;
2510 ff_print_debug_info(s, pict);
2511 }
2512 }
2513
2514 return 1;
2515 } else {
2516 return 0;
2517 }
2518 }
2519
2520 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2521 const uint8_t *buf, int buf_size)
2522 {
2523 Mpeg1Context *s1 = avctx->priv_data;
2524 MpegEncContext *s = &s1->mpeg_enc_ctx;
2525 int width,height;
2526 int i, v, j;
2527
2528 init_get_bits(&s->gb, buf, buf_size*8);
2529
2530 width = get_bits(&s->gb, 12);
2531 height = get_bits(&s->gb, 12);
2532 if (width <= 0 || height <= 0 ||
2533 (width % 2) != 0 || (height % 2) != 0)
2534 return -1;
2535 s->aspect_ratio_info= get_bits(&s->gb, 4);
2536 if (s->aspect_ratio_info == 0)
2537 return -1;
2538 s->frame_rate_index = get_bits(&s->gb, 4);
2539 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2540 return -1;
2541 s->bit_rate = get_bits(&s->gb, 18) * 400;
2542 if (get_bits1(&s->gb) == 0) /* marker */
2543 return -1;
2544 s->width = width;
2545 s->height = height;
2546
2547 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2548 skip_bits(&s->gb, 1);
2549
2550 /* get matrix */
2551 if (get_bits1(&s->gb)) {
2552 for(i=0;i<64;i++) {
2553 v = get_bits(&s->gb, 8);
2554 if(v==0){
2555 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2556 return -1;
2557 }
2558 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2559 s->intra_matrix[j] = v;
2560 s->chroma_intra_matrix[j] = v;
2561 }
2562 #ifdef DEBUG
2563 dprintf("intra matrix present\n");
2564 for(i=0;i<64;i++)
2565 dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]);
2566 printf("\n");
2567 #endif
2568 } else {
2569 for(i=0;i<64;i++) {
2570 j = s->dsp.idct_permutation[i];
2571 v = ff_mpeg1_default_intra_matrix[i];
2572 s->intra_matrix[j] = v;
2573 s->chroma_intra_matrix[j] = v;
2574 }
2575 }
2576 if (get_bits1(&s->gb)) {
2577 for(i=0;i<64;i++) {
2578 v = get_bits(&s->gb, 8);
2579 if(v==0){
2580 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2581 return -1;
2582 }
2583 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2584 s->inter_matrix[j] = v;
2585 s->chroma_inter_matrix[j] = v;
2586 }
2587 #ifdef DEBUG
2588 dprintf("non intra matrix present\n");
2589 for(i=0;i<64;i++)
2590 dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]);
2591 printf("\n");
2592 #endif
2593 } else {
2594 for(i=0;i<64;i++) {
2595 int j= s->dsp.idct_permutation[i];
2596 v = ff_mpeg1_default_non_intra_matrix[i];
2597 s->inter_matrix[j] = v;
2598 s->chroma_inter_matrix[j] = v;
2599 }
2600 }
2601
2602 if(show_bits(&s->gb, 23) != 0){
2603 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2604 return -1;
2605 }
2606
2607 /* we set mpeg2 parameters so that it emulates mpeg1 */
2608 s->progressive_sequence = 1;
2609 s->progressive_frame = 1;
2610 s->picture_structure = PICT_FRAME;
2611 s->frame_pred_frame_dct = 1;
2612 s->chroma_format = 1;
2613 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2614 avctx->sub_id = 1; /* indicates mpeg1 */
2615 s->out_format = FMT_MPEG1;
2616 s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
2617 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2618
2619 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2620 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2621 s->avctx->rc_buffer_size, s->bit_rate);
2622
2623 return 0;
2624 }
2625
2626 static int vcr2_init_sequence(AVCodecContext *avctx)
2627 {
2628 Mpeg1Context *s1 = avctx->priv_data;
2629 MpegEncContext *s = &s1->mpeg_enc_ctx;
2630 int i, v;
2631
2632 /* start new mpeg1 context decoding */
2633 s->out_format = FMT_MPEG1;
2634 if (s1->mpeg_enc_ctx_allocated) {
2635 MPV_common_end(s);
2636 }
2637 s->width = avctx->width;
2638 s->height = avctx->height;
2639 avctx->has_b_frames= 0; //true?
2640 s->low_delay= 1;
2641
2642 if(avctx->xvmc_acceleration){
2643 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2644 }else{
2645 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2646 }
2647
2648 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2649 if( avctx->idct_algo == FF_IDCT_AUTO )
2650 avctx->idct_algo = FF_IDCT_SIMPLE;
2651
2652 if (MPV_common_init(s) < 0)
2653 return -1;
2654 exchange_uv(s);//common init reset pblocks, so we swap them here
2655 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2656 s1->mpeg_enc_ctx_allocated = 1;
2657
2658 for(i=0;i<64;i++) {
2659 int j= s->dsp.idct_permutation[i];
2660 v = ff_mpeg1_default_intra_matrix[i];
2661 s->intra_matrix[j] = v;
2662 s->chroma_intra_matrix[j] = v;
2663
2664 v = ff_mpeg1_default_non_intra_matrix[i];
2665 s->inter_matrix[j] = v;
2666 s->chroma_inter_matrix[j] = v;
2667 }
2668
2669 s->progressive_sequence = 1;
2670 s->progressive_frame = 1;
2671 s->picture_structure = PICT_FRAME;
2672 s->frame_pred_frame_dct = 1;
2673 s->chroma_format = 1;
2674 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2675 avctx->sub_id = 2; /* indicates mpeg2 */
2676 return 0;
2677 }
2678
2679
2680 static void mpeg_decode_user_data(AVCodecContext *avctx,
2681 const uint8_t *buf, int buf_size)
2682 {
2683 const uint8_t *p;
2684 int len, flags;
2685 p = buf;
2686 len = buf_size;
2687
2688 /* we parse the DTG active format information */
2689 if (len >= 5 &&
2690 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2691 flags = p[4];
2692 p += 5;
2693 len -= 5;
2694 if (flags & 0x80) {
2695 /* skip event id */
2696 if (len < 2)
2697 return;
2698 p += 2;
2699 len -= 2;
2700 }
2701 if (flags & 0x40) {
2702 if (len < 1)
2703 return;
2704 avctx->dtg_active_format = p[0] & 0x0f;
2705 }
2706 }
2707 }
2708
2709 static void mpeg_decode_gop(AVCodecContext *avctx,
2710 const uint8_t *buf, int buf_size){
2711 Mpeg1Context *s1 = avctx->priv_data;
2712 MpegEncContext *s = &s1->mpeg_enc_ctx;
2713
2714 int drop_frame_flag;
2715 int time_code_hours, time_code_minutes;
2716 int time_code_seconds, time_code_pictures;
2717 int broken_link;
2718
2719 init_get_bits(&s->gb, buf, buf_size*8);
2720
2721 drop_frame_flag = get_bits1(&s->gb);
2722
2723 time_code_hours=get_bits(&s->gb,5);
2724 time_code_minutes = get_bits(&s->gb,6);
2725 skip_bits1(&s->gb);//marker bit
2726 time_code_seconds = get_bits(&s->gb,6);
2727 time_code_pictures = get_bits(&s->gb,6);
2728
2729 /*broken_link indicate that after editing the
2730 reference frames of the first B-Frames after GOP I-Frame
2731 are missing (open gop)*/
2732 broken_link = get_bits1(&s->gb);
2733
2734 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2735 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
2736 time_code_hours, time_code_minutes, time_code_seconds,
2737 time_code_pictures, broken_link);
2738 }
2739 /**
2740 * finds the end of the current frame in the bitstream.
2741 * @return the position of the first byte of the next frame, or -1
2742 */
2743 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
2744 {
2745 int i;
2746 uint32_t state;
2747
2748 state= pc->state;
2749
2750 i=0;
2751 if(!pc->frame_start_found){
2752 for(i=0; i<buf_size; i++){
2753 state= (state<<8) | buf[i];
2754 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2755 i++;
2756 pc->frame_start_found=1;
2757 break;
2758 }
2759 }
2760 }
2761
2762 if(pc->frame_start_found){
2763 /* EOF considered as end of frame */
2764 if (buf_size == 0)
2765 return 0;
2766 for(; i<buf_size; i++){
2767 state= (state<<8) | buf[i];
2768 if((state&0xFFFFFF00) == 0x100){
2769 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2770 pc->frame_start_found=0;
2771 pc->state=-1;
2772 return i-3;
2773 }
2774 }
2775 }
2776 }
2777 pc->state= state;
2778 return END_NOT_FOUND;
2779 }
2780
2781 /* handle buffering and image synchronisation */
2782 static int mpeg_decode_frame(AVCodecContext *avctx,
2783 void *data, int *data_size,
2784 uint8_t *buf, int buf_size)
2785 {
2786 Mpeg1Context *s = avctx->priv_data;
2787 const uint8_t *buf_end;
2788 const uint8_t *buf_ptr;
2789 int ret, start_code, input_size;
2790 AVFrame *picture = data;
2791 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2792 dprintf("fill_buffer\n");
2793
2794 /* special case for last picture */
2795 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2796 *picture= *(AVFrame*)s2->next_picture_ptr;
2797 s2->next_picture_ptr= NULL;
2798
2799 *data_size = sizeof(AVFrame);
2800 return 0;
2801 }
2802
2803 if(s2->flags&CODEC_FLAG_TRUNCATED){
2804 int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
2805
2806 if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 )
2807 return buf_size;
2808 }
2809
2810 buf_ptr = buf;
2811 buf_end = buf + buf_size;
2812
2813 #if 0
2814 if (s->repeat_field % 2 == 1) {
2815 s->repeat_field++;
2816 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2817 // s2->picture_number, s->repeat_field);
2818 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2819 *data_size = sizeof(AVPicture);
2820 goto the_end;
2821 }
2822 }
2823 #endif
2824
2825 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2826 vcr2_init_sequence(avctx);
2827
2828 s->slice_count= 0;
2829
2830 for(;;) {
2831 /* find start next code */
2832 start_code = find_start_code(&buf_ptr, buf_end);
2833 if (start_code < 0){
2834 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
2835 if(avctx->thread_count > 1){
2836 int i;
2837
2838 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
2839 for(i=0; i<s->slice_count; i++)
2840 s2->error_count += s2->thread_context[i]->error_count;
2841 }
2842 if (slice_end(avctx, picture)) {
2843 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2844 *data_size = sizeof(AVPicture);
2845 }
2846 }
2847 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2848 }
2849
2850 input_size = buf_end - buf_ptr;
2851
2852 if(avctx->debug & FF_DEBUG_STARTCODE){
2853 av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
2854 }
2855
2856 /* prepare data for next start code */
2857 switch(start_code) {
2858 case SEQ_START_CODE:
2859 mpeg1_decode_sequence(avctx, buf_ptr,
2860 input_size);
2861 break;
2862
2863 case PICTURE_START_CODE:
2864 /* we have a complete image : we try to decompress it */
2865 mpeg1_decode_picture(avctx,
2866 buf_ptr, input_size);
2867 break;
2868 case EXT_START_CODE:
2869 mpeg_decode_extension(avctx,
2870 buf_ptr, input_size);
2871 break;
2872 case USER_START_CODE:
2873 mpeg_decode_user_data(avctx,
2874 buf_ptr, input_size);
2875 break;
2876 case GOP_START_CODE:
2877 s2->first_field=0;
2878 mpeg_decode_gop(avctx,
2879 buf_ptr, input_size);
2880 break;
2881 default:
2882 if (start_code >= SLICE_MIN_START_CODE &&
2883 start_code <= SLICE_MAX_START_CODE) {
2884 int mb_y= start_code - SLICE_MIN_START_CODE;
2885
2886 /* skip b frames if we dont have reference frames */
2887 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
2888 /* skip b frames if we are in a hurry */
2889 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2890 /* skip everything if we are in a hurry>=5 */
2891 if(avctx->hurry_up>=5) break;
2892
2893 if (!s->mpeg_enc_ctx_allocated) break;
2894
2895 if(s2->first_slice){
2896 s2->first_slice=0;
2897 if(mpeg_field_start(s2) < 0)
2898 return -1;
2899 }
2900
2901 if(avctx->thread_count > 1){
2902 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2903 if(threshold <= mb_y){
2904 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2905
2906 thread_context->start_mb_y= mb_y;
2907 thread_context->end_mb_y = s2->mb_height;
2908 if(s->slice_count){
2909 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2910 ff_update_duplicate_context(thread_context, s2);
2911 }
2912 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2913 s->slice_count++;
2914 }
2915 buf_ptr += 2; //FIXME add minimum num of bytes per slice
2916 }else{
2917 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2918 emms_c();
2919
2920 if(ret < 0){
2921 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2922 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);
2923 }else{
2924 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);
2925 }
2926 }
2927 }
2928 break;
2929 }
2930 }
2931 }
2932
2933 static int mpeg_decode_end(AVCodecContext *avctx)
2934 {
2935 Mpeg1Context *s = avctx->priv_data;
2936
2937 if (s->mpeg_enc_ctx_allocated)
2938 MPV_common_end(&s->mpeg_enc_ctx);
2939 return 0;
2940 }
2941
2942 AVCodec mpeg1video_decoder = {
2943 "mpeg1video",
2944 CODEC_TYPE_VIDEO,
2945 CODEC_ID_MPEG1VIDEO,
2946 sizeof(Mpeg1Context),
2947 mpeg_decode_init,
2948 NULL,
2949 mpeg_decode_end,
2950 mpeg_decode_frame,
2951 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2952 .flush= ff_mpeg_flush,
2953 };
2954
2955 AVCodec mpeg2video_decoder = {
2956 "mpeg2video",
2957 CODEC_TYPE_VIDEO,
2958 CODEC_ID_MPEG2VIDEO,
2959 sizeof(Mpeg1Context),
2960 mpeg_decode_init,
2961 NULL,
2962 mpeg_decode_end,
2963 mpeg_decode_frame,
2964 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2965 .flush= ff_mpeg_flush,
2966 };
2967
2968 //legacy decoder
2969 AVCodec mpegvideo_decoder = {
2970 "mpegvideo",
2971 CODEC_TYPE_VIDEO,
2972 CODEC_ID_MPEG2VIDEO,
2973 sizeof(Mpeg1Context),
2974 mpeg_decode_init,
2975 NULL,
2976 mpeg_decode_end,
2977 mpeg_decode_frame,
2978 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2979 .flush= ff_mpeg_flush,
2980 };
2981
2982 #ifdef CONFIG_ENCODERS
2983
2984 AVCodec mpeg1video_encoder = {
2985 "mpeg1video",
2986 CODEC_TYPE_VIDEO,
2987 CODEC_ID_MPEG1VIDEO,
2988 sizeof(MpegEncContext),
2989 encode_init,
2990 MPV_encode_picture,
2991 MPV_encode_end,
2992 .supported_framerates= frame_rate_tab+1,
2993 };
2994
2995 #ifdef CONFIG_RISKY
2996
2997 AVCodec mpeg2video_encoder = {
2998 "mpeg2video",
2999 CODEC_TYPE_VIDEO,
3000 CODEC_ID_MPEG2VIDEO,
3001 sizeof(MpegEncContext),
3002 encode_init,
3003 MPV_encode_picture,
3004 MPV_encode_end,
3005 .supported_framerates= frame_rate_tab+1,
3006 };
3007 #endif
3008 #endif
3009
3010 #ifdef HAVE_XVMC
3011 static int mpeg_mc_decode_init(AVCodecContext *avctx){
3012 Mpeg1Context *s;
3013
3014 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
3015 return -1;
3016 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
3017 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
3018 }
3019 mpeg_decode_init(avctx);
3020 s = avctx->priv_data;
3021
3022 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
3023 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
3024
3025 return 0;
3026 }
3027
3028 AVCodec mpeg_xvmc_decoder = {
3029 "mpegvideo_xvmc",
3030 CODEC_TYPE_VIDEO,
3031 CODEC_ID_MPEG2VIDEO_XVMC,
3032 sizeof(Mpeg1Context),
3033 mpeg_mc_decode_init,
3034 NULL,
3035 mpeg_decode_end,
3036 mpeg_decode_frame,
3037 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL,
3038 .flush= ff_mpeg_flush,
3039 };
3040
3041 #endif
3042
3043 /* this is ugly i know, but the alternative is too make
3044 hundreds of vars global and prefix them with ff_mpeg1_
3045 which is far uglier. */
3046 #include "mdec.c"