2 * MPEG1 codec / MPEG2 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include "mpegvideo.h"
30 #include "mpeg12data.h"
34 #define SEQ_END_CODE 0x000001b7
35 #define SEQ_START_CODE 0x000001b3
36 #define GOP_START_CODE 0x000001b8
37 #define PICTURE_START_CODE 0x00000100
38 #define SLICE_MIN_START_CODE 0x00000101
39 #define SLICE_MAX_START_CODE 0x000001af
40 #define EXT_START_CODE 0x000001b5
41 #define USER_START_CODE 0x000001b2
45 #define MBINCR_VLC_BITS 9
46 #define MB_PAT_VLC_BITS 9
47 #define MB_PTYPE_VLC_BITS 6
48 #define MB_BTYPE_VLC_BITS 6
49 #define TEX_VLC_BITS 9
51 #ifdef CONFIG_ENCODERS
52 static void mpeg1_encode_block(MpegEncContext *s,
55 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
56 #endif //CONFIG_ENCODERS
57 static void mpeg1_skip_picture(MpegEncContext *s, int pict_num);
58 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
61 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
64 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
67 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
70 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
71 static void exchange_uv(MpegEncContext *s);
74 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
75 extern int XVMC_field_end(MpegEncContext *s);
76 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
77 extern void XVMC_init_block(MpegEncContext *s);//set s->block
80 #ifdef CONFIG_ENCODERS
81 static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
82 static uint8_t fcode_tab[MAX_MV*2+1];
84 static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
85 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
87 /* simple include everything table for dc, first byte is bits number next 3 are code*/
88 static uint32_t mpeg1_lum_dc_uni[512];
89 static uint32_t mpeg1_chr_dc_uni[512];
91 static uint8_t mpeg1_index_run[2][64];
92 static int8_t mpeg1_max_level[2][64];
93 #endif //CONFIG_ENCODERS
95 static void init_2d_vlc_rl(RLTable *rl)
99 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
100 &rl->table_vlc[0][1], 4, 2,
101 &rl->table_vlc[0][0], 4, 2);
104 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
105 for(i=0; i<rl->vlc.table_size; i++){
106 int code= rl->vlc.table[i][0];
107 int len = rl->vlc.table[i][1];
110 if(len==0){ // illegal code
113 }else if(len<0){ //more bits needed
117 if(code==rl->n){ //esc
120 }else if(code==rl->n+1){ //eob
124 run= rl->table_run [code] + 1;
125 level= rl->table_level[code];
128 rl->rl_vlc[0][i].len= len;
129 rl->rl_vlc[0][i].level= level;
130 rl->rl_vlc[0][i].run= run;
134 #ifdef CONFIG_ENCODERS
135 static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
138 for(i=0; i<128; i++){
141 for(run=0; run<64; run++){
144 int alevel= ABS(level);
145 int sign= (level>>31)&1;
147 if (alevel > rl->max_level[0][run])
150 code= rl->index_run[0][run] + alevel - 1;
152 if (code < 111 /* rl->n */) {
153 /* store the vlc & sign at once */
154 len= mpeg1_vlc[code][1]+1;
155 bits= (mpeg1_vlc[code][0]<<1) + sign;
157 len= mpeg1_vlc[111/*rl->n*/][1]+6;
158 bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
168 bits|= 0x8001 + level + 255;
170 bits|= level & 0xffff;
175 uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
176 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
181 static void put_header(MpegEncContext *s, int header)
183 align_put_bits(&s->pb);
184 put_bits(&s->pb, 16, header>>16);
185 put_bits(&s->pb, 16, header&0xFFFF);
188 /* put sequence header if needed */
189 static void mpeg1_encode_sequence_header(MpegEncContext *s)
191 unsigned int vbv_buffer_size;
195 float best_aspect_error= 1E10;
196 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
197 int constraint_parameter_flag;
199 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
201 if (s->current_picture.key_frame) {
202 /* mpeg1 header repeated every gop */
203 put_header(s, SEQ_START_CODE);
205 /* search closest frame rate */
208 s->frame_rate_index = 0;
211 if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
213 d = abs(MPEG1_FRAME_RATE_BASE*(int64_t)s->avctx->frame_rate/s->avctx->frame_rate_base - frame_rate_tab[i]);
216 s->frame_rate_index = i;
221 put_bits(&s->pb, 12, s->width);
222 put_bits(&s->pb, 12, s->height);
225 float error= aspect_ratio;
226 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
227 error-= 1.0/mpeg1_aspect[i];
229 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
233 if(error < best_aspect_error){
234 best_aspect_error= error;
235 s->aspect_ratio_info= i;
239 put_bits(&s->pb, 4, s->aspect_ratio_info);
240 put_bits(&s->pb, 4, s->frame_rate_index);
242 if(s->avctx->rc_max_rate){
243 v = (s->avctx->rc_max_rate + 399) / 400;
244 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
250 if(s->avctx->rc_buffer_size)
251 vbv_buffer_size = s->avctx->rc_buffer_size;
253 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
254 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
255 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
257 put_bits(&s->pb, 18, v & 0x3FFFF);
258 put_bits(&s->pb, 1, 1); /* marker */
259 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
261 constraint_parameter_flag=
262 s->width <= 768 && s->height <= 576 &&
263 s->mb_width * s->mb_height <= 396 &&
264 s->mb_width * s->mb_height * frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*396*25 &&
265 frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*30 &&
266 vbv_buffer_size <= 20 &&
268 s->codec_id == CODEC_ID_MPEG1VIDEO;
270 put_bits(&s->pb, 1, constraint_parameter_flag);
272 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
273 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
275 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
276 put_header(s, EXT_START_CODE);
277 put_bits(&s->pb, 4, 1); //seq ext
278 put_bits(&s->pb, 1, 0); //esc
279 put_bits(&s->pb, 3, 4); //profile
280 put_bits(&s->pb, 4, 8); //level
281 put_bits(&s->pb, 1, s->progressive_sequence);
282 put_bits(&s->pb, 2, 1); //chroma format 4:2:0
283 put_bits(&s->pb, 2, 0); //horizontal size ext
284 put_bits(&s->pb, 2, 0); //vertical size ext
285 put_bits(&s->pb, 12, v>>18); //bitrate ext
286 put_bits(&s->pb, 1, 1); //marker
287 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
288 put_bits(&s->pb, 1, s->low_delay);
289 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
290 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
293 put_header(s, GOP_START_CODE);
294 put_bits(&s->pb, 1, 0); /* do drop frame */
295 /* time code : we must convert from the real frame rate to a
296 fake mpeg frame rate in case of low frame rate */
297 fps = frame_rate_tab[s->frame_rate_index];
298 time_code = (int64_t)s->fake_picture_number * MPEG1_FRAME_RATE_BASE;
299 s->gop_picture_number = s->fake_picture_number;
300 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
301 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
302 put_bits(&s->pb, 1, 1);
303 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
304 put_bits(&s->pb, 6, (uint32_t)((time_code % fps) / MPEG1_FRAME_RATE_BASE));
305 put_bits(&s->pb, 1, 0); /* closed gop */
306 put_bits(&s->pb, 1, 0); /* broken link */
309 if (s->avctx->frame_rate < (24 * s->avctx->frame_rate_base) && s->picture_number > 0) {
310 /* insert empty P pictures to slow down to the desired
311 frame rate. Each fake pictures takes about 20 bytes */
312 fps = frame_rate_tab[s->frame_rate_index];
313 n = av_rescale((int64_t)s->picture_number * s->avctx->frame_rate_base, fps, s->avctx->frame_rate) / MPEG1_FRAME_RATE_BASE - 1;
314 while (s->fake_picture_number < n) {
315 mpeg1_skip_picture(s, s->fake_picture_number -
316 s->gop_picture_number);
317 s->fake_picture_number++;
323 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
325 put_bits(&s->pb, 11, 0x008);
328 put_bits(&s->pb, mbAddrIncrTable[run][1],
329 mbAddrIncrTable[run][0]);
332 /* insert a fake P picture */
333 static void mpeg1_skip_picture(MpegEncContext *s, int pict_num)
335 assert(s->codec_id == CODEC_ID_MPEG1VIDEO); // mpeg2 can do these repeat things
337 /* mpeg1 picture header */
338 put_header(s, PICTURE_START_CODE);
339 /* temporal reference */
340 put_bits(&s->pb, 10, pict_num & 0x3ff);
342 put_bits(&s->pb, 3, P_TYPE);
343 put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
345 put_bits(&s->pb, 1, 1); /* integer coordinates */
346 put_bits(&s->pb, 3, 1); /* forward_f_code */
348 put_bits(&s->pb, 1, 0); /* extra bit picture */
351 put_header(s, SLICE_MIN_START_CODE);
352 put_bits(&s->pb, 5, 1); /* quantizer scale */
353 put_bits(&s->pb, 1, 0); /* slice extra information */
355 encode_mb_skip_run(s, 0);
357 /* empty macroblock */
358 put_bits(&s->pb, 3, 1); /* motion only */
360 /* zero motion x & y */
361 put_bits(&s->pb, 1, 1);
362 put_bits(&s->pb, 1, 1);
364 /* output a number of empty slice */
365 encode_mb_skip_run(s, s->mb_width * s->mb_height - 2);
367 /* empty macroblock */
368 put_bits(&s->pb, 3, 1); /* motion only */
370 /* zero motion x & y */
371 put_bits(&s->pb, 1, 1);
372 put_bits(&s->pb, 1, 1);
374 #endif //CONFIG_ENCODERS
376 static void common_init(MpegEncContext *s)
379 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
382 void ff_mpeg1_clean_buffers(MpegEncContext *s){
383 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
384 s->last_dc[1] = s->last_dc[0];
385 s->last_dc[2] = s->last_dc[0];
386 memset(s->last_mv, 0, sizeof(s->last_mv));
389 #ifdef CONFIG_ENCODERS
391 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
392 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
393 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
394 put_bits(&s->pb, 1, 0); /* slice extra information */
397 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
399 mpeg1_encode_sequence_header(s);
401 /* mpeg1 picture header */
402 put_header(s, PICTURE_START_CODE);
403 /* temporal reference */
405 // RAL: s->picture_number instead of s->fake_picture_number
406 put_bits(&s->pb, 10, (s->picture_number -
407 s->gop_picture_number) & 0x3ff);
408 s->fake_picture_number++;
410 put_bits(&s->pb, 3, s->pict_type);
411 put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
413 // RAL: Forward f_code also needed for B frames
414 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
415 put_bits(&s->pb, 1, 0); /* half pel coordinates */
416 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
417 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
419 put_bits(&s->pb, 3, 7); /* forward_f_code */
422 // RAL: Backward f_code necessary for B frames
423 if (s->pict_type == B_TYPE) {
424 put_bits(&s->pb, 1, 0); /* half pel coordinates */
425 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
426 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
428 put_bits(&s->pb, 3, 7); /* backward_f_code */
431 put_bits(&s->pb, 1, 0); /* extra bit picture */
433 s->frame_pred_frame_dct = 1;
434 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
435 put_header(s, EXT_START_CODE);
436 put_bits(&s->pb, 4, 8); //pic ext
437 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
438 put_bits(&s->pb, 4, s->f_code);
439 put_bits(&s->pb, 4, s->f_code);
441 put_bits(&s->pb, 8, 255);
443 if (s->pict_type == B_TYPE) {
444 put_bits(&s->pb, 4, s->b_code);
445 put_bits(&s->pb, 4, s->b_code);
447 put_bits(&s->pb, 8, 255);
449 put_bits(&s->pb, 2, s->intra_dc_precision);
450 put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME);
451 if (s->progressive_sequence) {
452 put_bits(&s->pb, 1, 0); /* no repeat */
454 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
456 /* XXX: optimize the generation of this flag with entropy
458 s->frame_pred_frame_dct = s->progressive_sequence;
460 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
461 put_bits(&s->pb, 1, s->concealment_motion_vectors);
462 put_bits(&s->pb, 1, s->q_scale_type);
463 put_bits(&s->pb, 1, s->intra_vlc_format);
464 put_bits(&s->pb, 1, s->alternate_scan);
465 put_bits(&s->pb, 1, s->repeat_first_field);
466 put_bits(&s->pb, 1, s->chroma_420_type=1);
467 s->progressive_frame = s->progressive_sequence;
468 put_bits(&s->pb, 1, s->progressive_frame);
469 put_bits(&s->pb, 1, 0); //composite_display_flag
473 ff_mpeg1_encode_slice_header(s);
476 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
479 put_bits(&s->pb, n, bits);
480 if (!s->frame_pred_frame_dct) {
482 put_bits(&s->pb, 2, 2); /* motion_type: frame */
483 put_bits(&s->pb, 1, s->interlaced_dct);
487 void mpeg1_encode_mb(MpegEncContext *s,
488 DCTELEM block[6][64],
489 int motion_x, int motion_y)
492 const int mb_x = s->mb_x;
493 const int mb_y = s->mb_y;
494 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
499 if (s->block_last_index[i] >= 0)
503 if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
504 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
505 (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) |
506 ((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))) {
508 s->qscale -= s->dquant;
514 assert(s->mb_skip_run == 0);
515 encode_mb_skip_run(s, s->mb_x);
517 encode_mb_skip_run(s, s->mb_skip_run);
520 if (s->pict_type == I_TYPE) {
521 if(s->dquant && cbp){
522 put_mb_modes(s, 2, 1, 0); /* macroblock_type : macroblock_quant = 1 */
523 put_bits(&s->pb, 5, s->qscale);
525 put_mb_modes(s, 1, 1, 0); /* macroblock_type : macroblock_quant = 0 */
526 s->qscale -= s->dquant;
528 s->misc_bits+= get_bits_diff(s);
530 } else if (s->mb_intra) {
531 if(s->dquant && cbp){
532 put_mb_modes(s, 6, 0x01, 0);
533 put_bits(&s->pb, 5, s->qscale);
535 put_mb_modes(s, 5, 0x03, 0);
536 s->qscale -= s->dquant;
538 s->misc_bits+= get_bits_diff(s);
540 s->last_mv[0][0][0] =
541 s->last_mv[0][0][1] = 0;
542 } else if (s->pict_type == P_TYPE) {
544 if (motion_x == 0 && motion_y == 0) {
546 put_mb_modes(s, 5, 1, 0); /* macroblock_pattern & quant */
547 put_bits(&s->pb, 5, s->qscale);
549 put_mb_modes(s, 2, 1, 0); /* macroblock_pattern only */
551 s->misc_bits+= get_bits_diff(s);
552 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
555 put_mb_modes(s, 5, 2, 1); /* motion + cbp */
556 put_bits(&s->pb, 5, s->qscale);
558 put_mb_modes(s, 1, 1, 1); /* motion + cbp */
560 s->misc_bits+= get_bits_diff(s);
561 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
562 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
563 s->mv_bits+= get_bits_diff(s);
564 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
567 put_bits(&s->pb, 3, 1); /* motion only */
568 if (!s->frame_pred_frame_dct)
569 put_bits(&s->pb, 2, 2); /* motion_type: frame */
570 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
571 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
572 s->qscale -= s->dquant;
573 s->mv_bits+= get_bits_diff(s);
577 { // RAL: All the following bloc added for B frames:
579 { // With coded bloc pattern
580 if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
581 { // Bi-directional motion
583 put_mb_modes(s, 5, 2, 1);
584 put_bits(&s->pb, 5, s->qscale);
586 put_mb_modes(s, 2, 3, 1);
588 s->misc_bits += get_bits_diff(s);
589 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
590 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
591 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
592 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
595 s->mv_bits += get_bits_diff(s);
596 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
598 else if (s->mv_dir == MV_DIR_BACKWARD)
601 put_mb_modes(s, 6, 2, 1);
602 put_bits(&s->pb, 5, s->qscale);
604 put_mb_modes(s, 3, 3, 1);
606 s->misc_bits += get_bits_diff(s);
607 mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
608 mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
610 s->mv_bits += get_bits_diff(s);
611 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
613 else if (s->mv_dir == MV_DIR_FORWARD)
616 put_mb_modes(s, 6, 3, 1);
617 put_bits(&s->pb, 5, s->qscale);
619 put_mb_modes(s, 4, 3, 1);
621 s->misc_bits += get_bits_diff(s);
622 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
623 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
625 s->mv_bits += get_bits_diff(s);
626 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
630 { // No coded bloc pattern
631 if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
632 { // Bi-directional motion
633 put_bits(&s->pb, 2, 2); /* backward & forward motion */
634 if (!s->frame_pred_frame_dct)
635 put_bits(&s->pb, 2, 2); /* motion_type: frame */
636 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
637 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
638 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
639 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
643 else if (s->mv_dir == MV_DIR_BACKWARD)
645 put_bits(&s->pb, 3, 2); /* backward motion only */
646 if (!s->frame_pred_frame_dct)
647 put_bits(&s->pb, 2, 2); /* motion_type: frame */
648 mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
649 mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
652 else if (s->mv_dir == MV_DIR_FORWARD)
654 put_bits(&s->pb, 4, 2); /* forward motion only */
655 if (!s->frame_pred_frame_dct)
656 put_bits(&s->pb, 2, 2); /* motion_type: frame */
657 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
658 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
661 s->qscale -= s->dquant;
662 s->mv_bits += get_bits_diff(s);
664 // End of bloc from RAL
667 if (cbp & (1 << (5 - i))) {
668 mpeg1_encode_block(s, block[i], i);
673 s->i_tex_bits+= get_bits_diff(s);
675 s->p_tex_bits+= get_bits_diff(s);
679 if (s->mv_dir & MV_DIR_FORWARD)
681 s->last_mv[0][0][0]= s->mv[0][0][0];
682 s->last_mv[0][0][1]= s->mv[0][0][1];
684 if (s->mv_dir & MV_DIR_BACKWARD)
686 s->last_mv[1][0][0]= s->mv[1][0][0];
687 s->last_mv[1][0][1]= s->mv[1][0][1];
691 // RAL: Parameter added: f_or_b_code
692 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
694 int code, bit_size, l, m, bits, range, sign;
700 mbMotionVectorTable[0][1],
701 mbMotionVectorTable[0][0]);
703 bit_size = f_or_b_code - 1;
704 range = 1 << bit_size;
705 /* modulo encoding */
710 } else if (val >= l) {
716 code = (val >> bit_size) + 1;
717 bits = val & (range - 1);
722 code = (val >> bit_size) + 1;
723 bits = val & (range - 1);
727 assert(code > 0 && code <= 16);
730 mbMotionVectorTable[code][1],
731 mbMotionVectorTable[code][0]);
733 put_bits(&s->pb, 1, sign);
735 put_bits(&s->pb, bit_size, bits);
740 void ff_mpeg1_encode_init(MpegEncContext *s)
756 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
757 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
760 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
762 /* build unified dc encoding tables */
763 for(i=-255; i<256; i++)
771 index = vlc_dc_table[adiff];
773 bits= vlc_dc_lum_bits[index] + index;
774 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
775 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
777 bits= vlc_dc_chroma_bits[index] + index;
778 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
779 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
782 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
784 for(f_code=1; f_code<=MAX_FCODE; f_code++){
785 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
788 if(mv==0) len= mbMotionVectorTable[0][1];
790 int val, bit_size, range, code;
792 bit_size = s->f_code - 1;
793 range = 1 << bit_size;
799 code = (val >> bit_size) + 1;
801 len= mbMotionVectorTable[code][1] + 1 + bit_size;
803 len= mbMotionVectorTable[16][1] + 2 + bit_size;
807 mv_penalty[f_code][mv+MAX_MV]= len;
812 for(f_code=MAX_FCODE; f_code>0; f_code--){
813 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
814 fcode_tab[mv+MAX_MV]= f_code;
818 s->me.mv_penalty= mv_penalty;
819 s->fcode_tab= fcode_tab;
820 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
827 s->intra_ac_vlc_length=
828 s->inter_ac_vlc_length=
829 s->intra_ac_vlc_last_length=
830 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
833 static inline void encode_dc(MpegEncContext *s, int diff, int component)
835 if (component == 0) {
838 mpeg1_lum_dc_uni[diff+255]&0xFF,
839 mpeg1_lum_dc_uni[diff+255]>>8);
843 mpeg1_chr_dc_uni[diff+255]&0xFF,
844 mpeg1_chr_dc_uni[diff+255]>>8);
848 static void mpeg1_encode_block(MpegEncContext *s,
852 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
854 // RLTable *rl = &rl_mpeg1;
856 last_index = s->block_last_index[n];
860 component = (n <= 3 ? 0 : n - 4 + 1);
861 dc = block[0]; /* overflow is impossible */
862 diff = dc - s->last_dc[component];
863 encode_dc(s, diff, component);
864 s->last_dc[component] = dc;
867 if (s->intra_vlc_format)
873 /* encode the first coefficient : needs to be done here because
874 it is handled slightly differently */
876 if (abs(level) == 1) {
877 code = ((uint32_t)level >> 31); /* the sign bit */
878 put_bits(&s->pb, 2, code | 0x02);
887 /* now quantify & encode AC coefs */
888 last_non_zero = i - 1;
890 for(;i<=last_index;i++) {
891 j = s->intra_scantable.permutated[i];
896 dprintf("level[%d]=%d\n", i, level);
898 /* encode using VLC */
900 run = i - last_non_zero - 1;
903 MASK_ABS(sign, alevel)
906 // code = get_rl_index(rl, 0, run, alevel);
907 if (alevel <= mpeg1_max_level[0][run]){
908 code= mpeg1_index_run[0][run] + alevel - 1;
909 /* store the vlc & sign at once */
910 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
912 /* escape seems to be pretty rare <5% so i dont optimize it */
913 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
914 /* escape: only clip in this case */
915 put_bits(&s->pb, 6, run);
916 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
918 put_bits(&s->pb, 8, level & 0xff);
921 put_bits(&s->pb, 16, 0x8001 + level + 255);
923 put_bits(&s->pb, 16, level & 0xffff);
927 put_bits(&s->pb, 12, level & 0xfff);
934 put_bits(&s->pb, 2, 0x2);
936 #endif //CONFIG_ENCODERS
938 /******************************************/
941 static VLC dc_lum_vlc;
942 static VLC dc_chroma_vlc;
944 static VLC mbincr_vlc;
945 static VLC mb_ptype_vlc;
946 static VLC mb_btype_vlc;
947 static VLC mb_pat_vlc;
949 static void init_vlcs()
956 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
957 vlc_dc_lum_bits, 1, 1,
958 vlc_dc_lum_code, 2, 2);
959 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
960 vlc_dc_chroma_bits, 1, 1,
961 vlc_dc_chroma_code, 2, 2);
962 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
963 &mbMotionVectorTable[0][1], 2, 1,
964 &mbMotionVectorTable[0][0], 2, 1);
965 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
966 &mbAddrIncrTable[0][1], 2, 1,
967 &mbAddrIncrTable[0][0], 2, 1);
968 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
969 &mbPatTable[0][1], 2, 1,
970 &mbPatTable[0][0], 2, 1);
972 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
973 &table_mb_ptype[0][1], 2, 1,
974 &table_mb_ptype[0][0], 2, 1);
975 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
976 &table_mb_btype[0][1], 2, 1,
977 &table_mb_btype[0][0], 2, 1);
981 init_2d_vlc_rl(&rl_mpeg1);
982 init_2d_vlc_rl(&rl_mpeg2);
986 static inline int get_dmv(MpegEncContext *s)
988 if(get_bits1(&s->gb))
989 return 1 - (get_bits1(&s->gb) << 1);
994 static inline int get_qscale(MpegEncContext *s)
996 int qscale = get_bits(&s->gb, 5);
997 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
998 if (s->q_scale_type) {
999 return non_linear_qscale[qscale];
1007 /* motion type (for mpeg2) */
1013 static int mpeg_decode_mb(MpegEncContext *s,
1014 DCTELEM block[6][64])
1016 int i, j, k, cbp, val, mb_type, motion_type;
1018 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1020 assert(s->mb_skiped==0);
1022 if (s->mb_skip_run-- != 0) {
1023 if(s->pict_type == I_TYPE){
1024 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1031 s->block_last_index[i] = -1;
1032 s->mv_type = MV_TYPE_16X16;
1033 if (s->pict_type == P_TYPE) {
1034 /* if P type, zero motion vector is implied */
1035 s->mv_dir = MV_DIR_FORWARD;
1036 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1037 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1038 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1040 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1042 /* if B type, reuse previous vectors and directions */
1043 s->mv[0][0][0] = s->last_mv[0][0][0];
1044 s->mv[0][0][1] = s->last_mv[0][0][1];
1045 s->mv[1][0][0] = s->last_mv[1][0][0];
1046 s->mv[1][0][1] = s->last_mv[1][0][1];
1048 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1049 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1050 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1052 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1059 switch(s->pict_type) {
1062 if (get_bits1(&s->gb) == 0) {
1063 if (get_bits1(&s->gb) == 0){
1064 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1067 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1069 mb_type = MB_TYPE_INTRA;
1073 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1075 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1078 mb_type = ptype2mb_type[ mb_type ];
1081 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1083 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1086 mb_type = btype2mb_type[ mb_type ];
1089 dprintf("mb_type=%x\n", mb_type);
1090 // motion_type = 0; /* avoid warning */
1091 if (IS_INTRA(mb_type)) {
1092 /* compute dct type */
1093 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1094 !s->frame_pred_frame_dct) {
1095 s->interlaced_dct = get_bits1(&s->gb);
1098 if (IS_QUANT(mb_type))
1099 s->qscale = get_qscale(s);
1101 if (s->concealment_motion_vectors) {
1102 /* just parse them */
1103 if (s->picture_structure != PICT_FRAME)
1104 skip_bits1(&s->gb); /* field select */
1106 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1107 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1108 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1109 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1111 skip_bits1(&s->gb); /* marker */
1113 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1116 //one 1 we memcpy blocks in xvmcvideo
1117 if(s->avctx->xvmc_acceleration > 1){
1118 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1125 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1127 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1132 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1137 if (mb_type & MB_TYPE_ZERO_MV){
1138 assert(mb_type & MB_TYPE_CBP);
1140 /* compute dct type */
1141 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1142 !s->frame_pred_frame_dct) {
1143 s->interlaced_dct = get_bits1(&s->gb);
1146 if (IS_QUANT(mb_type))
1147 s->qscale = get_qscale(s);
1149 s->mv_dir = MV_DIR_FORWARD;
1150 s->mv_type = MV_TYPE_16X16;
1151 s->last_mv[0][0][0] = 0;
1152 s->last_mv[0][0][1] = 0;
1153 s->last_mv[0][1][0] = 0;
1154 s->last_mv[0][1][1] = 0;
1158 assert(mb_type & MB_TYPE_L0L1);
1159 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1160 /* get additionnal motion vector type */
1161 if (s->frame_pred_frame_dct)
1162 motion_type = MT_FRAME;
1164 motion_type = get_bits(&s->gb, 2);
1167 /* compute dct type */
1168 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1169 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1170 s->interlaced_dct = get_bits1(&s->gb);
1173 if (IS_QUANT(mb_type))
1174 s->qscale = get_qscale(s);
1176 /* motion vectors */
1179 if (USES_LIST(mb_type, i)) {
1180 s->mv_dir |= (MV_DIR_FORWARD >> i);
1181 dprintf("motion_type=%d\n", motion_type);
1182 switch(motion_type) {
1183 case MT_FRAME: /* or MT_16X8 */
1184 if (s->picture_structure == PICT_FRAME) {
1186 mb_type |= MB_TYPE_16x16;
1187 s->mv_type = MV_TYPE_16X16;
1188 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1189 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1190 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1191 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1192 /* full_pel: only for mpeg1 */
1193 if (s->full_pel[i]){
1194 s->mv[i][0][0] <<= 1;
1195 s->mv[i][0][1] <<= 1;
1199 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1200 s->mv_type = MV_TYPE_16X8;
1202 s->field_select[i][j] = get_bits1(&s->gb);
1204 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1205 s->last_mv[i][j][k]);
1206 s->last_mv[i][j][k] = val;
1207 s->mv[i][j][k] = val;
1213 s->mv_type = MV_TYPE_FIELD;
1214 if (s->picture_structure == PICT_FRAME) {
1215 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1217 s->field_select[i][j] = get_bits1(&s->gb);
1218 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1219 s->last_mv[i][j][0]);
1220 s->last_mv[i][j][0] = val;
1221 s->mv[i][j][0] = val;
1222 dprintf("fmx=%d\n", val);
1223 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1224 s->last_mv[i][j][1] >> 1);
1225 s->last_mv[i][j][1] = val << 1;
1226 s->mv[i][j][1] = val;
1227 dprintf("fmy=%d\n", val);
1230 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1231 s->field_select[i][0] = get_bits1(&s->gb);
1233 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1234 s->last_mv[i][0][k]);
1235 s->last_mv[i][0][k] = val;
1236 s->last_mv[i][1][k] = val;
1237 s->mv[i][0][k] = val;
1243 int dmx, dmy, mx, my, m;
1245 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1246 s->last_mv[i][0][0]);
1247 s->last_mv[i][0][0] = mx;
1248 s->last_mv[i][1][0] = mx;
1250 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1251 s->last_mv[i][0][1] >> 1);
1253 s->mv_type = MV_TYPE_DMV;
1256 s->last_mv[i][0][1] = my<<1;
1257 s->last_mv[i][1][1] = my<<1;
1259 s->mv[i][0][0] = mx;
1260 s->mv[i][0][1] = my;
1261 s->mv[i][1][0] = mx;//not used
1262 s->mv[i][1][1] = my;//not used
1264 if (s->picture_structure == PICT_FRAME) {
1265 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1267 //m = 1 + 2 * s->top_field_first;
1268 m = s->top_field_first ? 1 : 3;
1270 /* top -> top pred */
1271 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1272 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1274 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1275 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1277 mb_type |= MB_TYPE_16x16;
1279 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1280 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1281 if(s->picture_structure == PICT_TOP_FIELD)
1289 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1298 if (HAS_CBP(mb_type)) {
1299 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1301 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1307 //on 1 we memcpy blocks in xvmcvideo
1308 if(s->avctx->xvmc_acceleration > 1){
1309 XVMC_pack_pblocks(s,cbp);
1316 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1319 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1322 s->block_last_index[i] = -1;
1329 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1332 s->block_last_index[i] = -1;
1339 s->block_last_index[i] = -1;
1343 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1348 /* as h263, but only 17 codes */
1349 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1351 int code, sign, val, l, shift;
1353 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1361 sign = get_bits1(&s->gb);
1365 val = (val - 1) << shift;
1366 val |= get_bits(&s->gb, shift);
1373 /* modulo decoding */
1375 val = ((val + l)&(l*2-1)) - l;
1379 static inline int decode_dc(GetBitContext *gb, int component)
1383 if (component == 0) {
1384 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1386 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1389 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1395 diff = get_xbits(gb, code);
1400 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1404 int level, dc, diff, i, j, run;
1406 RLTable *rl = &rl_mpeg1;
1407 uint8_t * const scantable= s->intra_scantable.permutated;
1408 const uint16_t *quant_matrix= s->intra_matrix;
1409 const int qscale= s->qscale;
1412 component = (n <= 3 ? 0 : n - 4 + 1);
1413 diff = decode_dc(&s->gb, component);
1416 dc = s->last_dc[component];
1418 s->last_dc[component] = dc;
1420 dprintf("dc=%d diff=%d\n", dc, diff);
1423 OPEN_READER(re, &s->gb);
1424 /* now quantify & encode AC coefs */
1426 UPDATE_CACHE(re, &s->gb);
1427 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1431 } else if(level != 0) {
1434 level= (level*qscale*quant_matrix[j])>>3;
1436 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1437 LAST_SKIP_BITS(re, &s->gb, 1);
1440 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1441 UPDATE_CACHE(re, &s->gb);
1442 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1443 if (level == -128) {
1444 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1445 } else if (level == 0) {
1446 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1452 level= (level*qscale*quant_matrix[j])>>3;
1456 level= (level*qscale*quant_matrix[j])>>3;
1461 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1467 CLOSE_READER(re, &s->gb);
1469 s->block_last_index[n] = i;
1473 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1477 int level, i, j, run;
1478 RLTable *rl = &rl_mpeg1;
1479 uint8_t * const scantable= s->intra_scantable.permutated;
1480 const uint16_t *quant_matrix= s->inter_matrix;
1481 const int qscale= s->qscale;
1485 OPEN_READER(re, &s->gb);
1487 /* special case for the first coef. no need to add a second vlc table */
1488 UPDATE_CACHE(re, &s->gb);
1489 v= SHOW_UBITS(re, &s->gb, 2);
1491 LAST_SKIP_BITS(re, &s->gb, 2);
1492 level= (3*qscale*quant_matrix[0])>>4;
1500 /* now quantify & encode AC coefs */
1502 UPDATE_CACHE(re, &s->gb);
1503 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1507 } else if(level != 0) {
1510 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1512 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1513 LAST_SKIP_BITS(re, &s->gb, 1);
1516 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1517 UPDATE_CACHE(re, &s->gb);
1518 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1519 if (level == -128) {
1520 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1521 } else if (level == 0) {
1522 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1528 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1532 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1537 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1543 CLOSE_READER(re, &s->gb);
1545 s->block_last_index[n] = i;
1549 /* Also does unquantization here, since I will never support mpeg2
1551 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1555 int level, i, j, run;
1556 RLTable *rl = &rl_mpeg1;
1557 uint8_t * const scantable= s->intra_scantable.permutated;
1558 const uint16_t *quant_matrix;
1559 const int qscale= s->qscale;
1566 OPEN_READER(re, &s->gb);
1569 quant_matrix = s->inter_matrix;
1571 quant_matrix = s->chroma_inter_matrix;
1573 /* special case for the first coef. no need to add a second vlc table */
1574 UPDATE_CACHE(re, &s->gb);
1575 v= SHOW_UBITS(re, &s->gb, 2);
1577 LAST_SKIP_BITS(re, &s->gb, 2);
1578 level= (3*qscale*quant_matrix[0])>>5;
1586 /* now quantify & encode AC coefs */
1588 UPDATE_CACHE(re, &s->gb);
1589 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1593 } else if(level != 0) {
1596 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1597 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1598 LAST_SKIP_BITS(re, &s->gb, 1);
1601 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1602 UPDATE_CACHE(re, &s->gb);
1603 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1608 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1611 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1615 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1622 CLOSE_READER(re, &s->gb);
1624 block[63] ^= (mismatch & 1);
1626 s->block_last_index[n] = i;
1630 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1634 int level, dc, diff, i, j, run;
1637 uint8_t * const scantable= s->intra_scantable.permutated;
1638 const uint16_t *quant_matrix;
1639 const int qscale= s->qscale;
1644 quant_matrix = s->intra_matrix;
1647 quant_matrix = s->chroma_intra_matrix;
1650 diff = decode_dc(&s->gb, component);
1653 dc = s->last_dc[component];
1655 s->last_dc[component] = dc;
1656 block[0] = dc << (3 - s->intra_dc_precision);
1657 dprintf("dc=%d\n", block[0]);
1658 mismatch = block[0] ^ 1;
1660 if (s->intra_vlc_format)
1666 OPEN_READER(re, &s->gb);
1667 /* now quantify & encode AC coefs */
1669 UPDATE_CACHE(re, &s->gb);
1670 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1674 } else if(level != 0) {
1677 level= (level*qscale*quant_matrix[j])>>4;
1678 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1679 LAST_SKIP_BITS(re, &s->gb, 1);
1682 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1683 UPDATE_CACHE(re, &s->gb);
1684 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1688 level= (-level*qscale*quant_matrix[j])>>4;
1691 level= (level*qscale*quant_matrix[j])>>4;
1695 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1702 CLOSE_READER(re, &s->gb);
1704 block[63]^= mismatch&1;
1706 s->block_last_index[n] = i;
1710 typedef struct Mpeg1Context {
1711 MpegEncContext mpeg_enc_ctx;
1712 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1713 int repeat_field; /* true if we must repeat the field */
1714 AVPanScan pan_scan; /** some temporary storage for the panscan */
1717 static int mpeg_decode_init(AVCodecContext *avctx)
1719 Mpeg1Context *s = avctx->priv_data;
1721 s->mpeg_enc_ctx.flags= avctx->flags;
1722 common_init(&s->mpeg_enc_ctx);
1725 s->mpeg_enc_ctx_allocated = 0;
1726 s->mpeg_enc_ctx.picture_number = 0;
1727 s->repeat_field = 0;
1728 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1732 /* return the 8 bit start code value and update the search
1733 state. Return -1 if no start code found */
1734 static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
1737 unsigned int state=0xFFFFFFFF, v;
1740 buf_ptr = *pbuf_ptr;
1741 while (buf_ptr < buf_end) {
1743 if (state == 0x000001) {
1744 state = ((state << 8) | v) & 0xffffff;
1748 state = ((state << 8) | v) & 0xffffff;
1752 *pbuf_ptr = buf_ptr;
1756 static int mpeg1_decode_picture(AVCodecContext *avctx,
1757 uint8_t *buf, int buf_size)
1759 Mpeg1Context *s1 = avctx->priv_data;
1760 MpegEncContext *s = &s1->mpeg_enc_ctx;
1763 init_get_bits(&s->gb, buf, buf_size*8);
1765 ref = get_bits(&s->gb, 10); /* temporal ref */
1766 s->pict_type = get_bits(&s->gb, 3);
1767 dprintf("pict_type=%d number=%d\n", s->pict_type, s->picture_number);
1769 skip_bits(&s->gb, 16);
1770 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
1771 s->full_pel[0] = get_bits1(&s->gb);
1772 f_code = get_bits(&s->gb, 3);
1775 s->mpeg_f_code[0][0] = f_code;
1776 s->mpeg_f_code[0][1] = f_code;
1778 if (s->pict_type == B_TYPE) {
1779 s->full_pel[1] = get_bits1(&s->gb);
1780 f_code = get_bits(&s->gb, 3);
1783 s->mpeg_f_code[1][0] = f_code;
1784 s->mpeg_f_code[1][1] = f_code;
1786 s->current_picture.pict_type= s->pict_type;
1787 s->current_picture.key_frame= s->pict_type == I_TYPE;
1795 static void mpeg_decode_sequence_extension(MpegEncContext *s)
1797 int horiz_size_ext, vert_size_ext;
1798 int bit_rate_ext, vbv_buf_ext;
1799 int frame_rate_ext_n, frame_rate_ext_d;
1802 skip_bits(&s->gb, 1); /* profil and level esc*/
1803 profile= get_bits(&s->gb, 3);
1804 level= get_bits(&s->gb, 4);
1805 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1806 skip_bits(&s->gb, 2); /* chroma_format */
1807 horiz_size_ext = get_bits(&s->gb, 2);
1808 vert_size_ext = get_bits(&s->gb, 2);
1809 s->width |= (horiz_size_ext << 12);
1810 s->height |= (vert_size_ext << 12);
1811 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1812 s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400;
1813 skip_bits1(&s->gb); /* marker */
1814 vbv_buf_ext = get_bits(&s->gb, 8);
1816 s->low_delay = get_bits1(&s->gb);
1817 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1819 frame_rate_ext_n = get_bits(&s->gb, 2);
1820 frame_rate_ext_d = get_bits(&s->gb, 5);
1822 &s->avctx->frame_rate,
1823 &s->avctx->frame_rate_base,
1824 frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1),
1825 MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1),
1828 dprintf("sequence extension\n");
1829 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1830 s->avctx->sub_id = 2; /* indicates mpeg2 found */
1832 if(s->aspect_ratio_info <= 1)
1833 s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
1835 s->avctx->sample_aspect_ratio=
1837 mpeg2_aspect[s->aspect_ratio_info],
1838 (AVRational){s->width, s->height}
1842 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1843 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d \n", profile, level);
1846 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1848 MpegEncContext *s= &s1->mpeg_enc_ctx;
1849 int color_description, w, h;
1851 skip_bits(&s->gb, 3); /* video format */
1852 color_description= get_bits1(&s->gb);
1853 if(color_description){
1854 skip_bits(&s->gb, 8); /* color primaries */
1855 skip_bits(&s->gb, 8); /* transfer_characteristics */
1856 skip_bits(&s->gb, 8); /* matrix_coefficients */
1858 w= get_bits(&s->gb, 14);
1859 skip_bits(&s->gb, 1); //marker
1860 h= get_bits(&s->gb, 14);
1861 skip_bits(&s->gb, 1); //marker
1863 s1->pan_scan.width= 16*w;
1864 s1->pan_scan.height=16*h;
1866 if(s->aspect_ratio_info > 1)
1867 s->avctx->sample_aspect_ratio=
1869 mpeg2_aspect[s->aspect_ratio_info],
1873 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1874 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1877 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1879 MpegEncContext *s= &s1->mpeg_enc_ctx;
1882 for(i=0; i<1; i++){ //FIXME count
1883 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1884 skip_bits(&s->gb, 1); //marker
1885 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1886 skip_bits(&s->gb, 1); //marker
1889 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1890 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1891 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1892 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1893 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1897 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1901 dprintf("matrix extension\n");
1903 if (get_bits1(&s->gb)) {
1905 v = get_bits(&s->gb, 8);
1906 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1907 s->intra_matrix[j] = v;
1908 s->chroma_intra_matrix[j] = v;
1911 if (get_bits1(&s->gb)) {
1913 v = get_bits(&s->gb, 8);
1914 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1915 s->inter_matrix[j] = v;
1916 s->chroma_inter_matrix[j] = v;
1919 if (get_bits1(&s->gb)) {
1921 v = get_bits(&s->gb, 8);
1922 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1923 s->chroma_intra_matrix[j] = v;
1926 if (get_bits1(&s->gb)) {
1928 v = get_bits(&s->gb, 8);
1929 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1930 s->chroma_inter_matrix[j] = v;
1935 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
1937 s->full_pel[0] = s->full_pel[1] = 0;
1938 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1939 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1940 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1941 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1942 s->intra_dc_precision = get_bits(&s->gb, 2);
1943 s->picture_structure = get_bits(&s->gb, 2);
1944 s->top_field_first = get_bits1(&s->gb);
1945 s->frame_pred_frame_dct = get_bits1(&s->gb);
1946 s->concealment_motion_vectors = get_bits1(&s->gb);
1947 s->q_scale_type = get_bits1(&s->gb);
1948 s->intra_vlc_format = get_bits1(&s->gb);
1949 s->alternate_scan = get_bits1(&s->gb);
1950 s->repeat_first_field = get_bits1(&s->gb);
1951 s->chroma_420_type = get_bits1(&s->gb);
1952 s->progressive_frame = get_bits1(&s->gb);
1954 if(s->picture_structure == PICT_FRAME)
1957 s->first_field ^= 1;
1958 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
1961 if(s->alternate_scan){
1962 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
1963 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
1964 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
1965 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
1967 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
1968 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
1969 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
1970 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
1973 /* composite display not parsed */
1974 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
1975 dprintf("picture_structure=%d\n", s->picture_structure);
1976 dprintf("top field first=%d\n", s->top_field_first);
1977 dprintf("repeat first field=%d\n", s->repeat_first_field);
1978 dprintf("conceal=%d\n", s->concealment_motion_vectors);
1979 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
1980 dprintf("alternate_scan=%d\n", s->alternate_scan);
1981 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1982 dprintf("progressive_frame=%d\n", s->progressive_frame);
1985 static void mpeg_decode_extension(AVCodecContext *avctx,
1986 uint8_t *buf, int buf_size)
1988 Mpeg1Context *s1 = avctx->priv_data;
1989 MpegEncContext *s = &s1->mpeg_enc_ctx;
1992 init_get_bits(&s->gb, buf, buf_size*8);
1994 ext_type = get_bits(&s->gb, 4);
1997 mpeg_decode_sequence_extension(s);
2000 mpeg_decode_sequence_display_extension(s1);
2003 mpeg_decode_quant_matrix_extension(s);
2006 mpeg_decode_picture_display_extension(s1);
2009 mpeg_decode_picture_coding_extension(s);
2014 static void exchange_uv(MpegEncContext *s){
2017 tmp = s->pblocks[4];
2018 s->pblocks[4] = s->pblocks[5];
2019 s->pblocks[5] = tmp;
2022 #define DECODE_SLICE_FATAL_ERROR -2
2023 #define DECODE_SLICE_ERROR -1
2024 #define DECODE_SLICE_OK 0
2028 * @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured<br>
2029 * DECODE_SLICE_ERROR if the slice is damaged<br>
2030 * DECODE_SLICE_OK if this slice is ok<br>
2032 static int mpeg_decode_slice(AVCodecContext *avctx,
2035 uint8_t **buf, int buf_size)
2037 Mpeg1Context *s1 = avctx->priv_data;
2038 MpegEncContext *s = &s1->mpeg_enc_ctx;
2040 const int field_pic= s->picture_structure != PICT_FRAME;
2042 s->resync_mb_x= s->mb_x =
2043 s->resync_mb_y= s->mb_y = -1;
2045 start_code = (start_code - 1) & 0xff;
2046 if (start_code >= s->mb_height){
2047 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", start_code, s->mb_height);
2051 ff_mpeg1_clean_buffers(s);
2052 s->interlaced_dct = 0;
2054 /* start frame decoding */
2055 if (s->first_slice) {
2056 if(s->first_field || s->picture_structure==PICT_FRAME){
2057 if(MPV_frame_start(s, avctx) < 0)
2058 return DECODE_SLICE_FATAL_ERROR;
2060 ff_er_frame_start(s);
2062 /* first check if we must repeat the frame */
2063 s->current_picture_ptr->repeat_pict = 0;
2064 if (s->repeat_first_field) {
2065 if (s->progressive_sequence) {
2066 if (s->top_field_first)
2067 s->current_picture_ptr->repeat_pict = 4;
2069 s->current_picture_ptr->repeat_pict = 2;
2070 } else if (s->progressive_frame) {
2071 s->current_picture_ptr->repeat_pict = 1;
2075 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2077 //printf("%d\n", s->current_picture_ptr->repeat_pict);
2079 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2080 av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
2081 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],
2082 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2083 s->progressive_sequence ? "pro" :"", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2084 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2085 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2087 }else{ //second field
2090 if(!s->current_picture_ptr){
2091 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2096 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2097 if(s->picture_structure == PICT_BOTTOM_FIELD){
2098 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2103 // MPV_frame_start will call this function too,
2104 // but we need to call it on every field
2105 if(s->avctx->xvmc_acceleration)
2106 XVMC_field_start(s,avctx);
2108 }//fi(s->first_slice)
2111 init_get_bits(&s->gb, *buf, buf_size*8);
2113 s->qscale = get_qscale(s);
2115 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2119 /* extra slice info */
2120 while (get_bits1(&s->gb) != 0) {
2121 skip_bits(&s->gb, 8);
2127 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2129 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2136 /* otherwise, stuffing, nothing to do */
2143 s->resync_mb_x= s->mb_x;
2144 s->resync_mb_y= s->mb_y = start_code;
2146 ff_init_block_index(s);
2150 //one 1 we memcpy blocks in xvmcvideo
2151 if(s->avctx->xvmc_acceleration > 1)
2152 XVMC_init_block(s);//set s->block
2155 s->dsp.clear_blocks(s->block[0]);
2157 ret = mpeg_decode_mb(s, s->block);
2158 s->chroma_qscale= s->qscale;
2160 dprintf("ret=%d\n", ret);
2164 if(s->current_picture.motion_val[0]){ //note motion_val is normally NULL unless we want to extract the MVs
2165 const int wrap = s->block_wrap[0];
2166 const int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
2167 int motion_for_x, motion_for_y, motion_back_x, motion_back_y;
2169 motion_for_x = motion_for_y = motion_back_x = motion_back_y = 0;
2170 }else if (s->mv_type == MV_TYPE_16X16){
2171 motion_for_x = s->mv[0][0][0];
2172 motion_for_y = s->mv[0][0][1];
2173 motion_back_x = s->mv[1][0][0];
2174 motion_back_y = s->mv[1][0][1];
2175 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2176 motion_for_x = s->mv[0][0][0] + s->mv[0][1][0];
2177 motion_for_y = s->mv[0][0][1] + s->mv[0][1][1];
2178 motion_for_x = (motion_for_x>>1) | (motion_for_x&1);
2179 motion_back_x = s->mv[1][0][0] + s->mv[1][1][0];
2180 motion_back_y = s->mv[1][0][1] + s->mv[1][1][1];
2181 motion_back_x = (motion_back_x>>1) | (motion_back_x&1);
2184 s->current_picture.motion_val[0][xy][0] = motion_for_x;
2185 s->current_picture.motion_val[0][xy][1] = motion_for_y;
2186 s->current_picture.motion_val[0][xy + 1][0] = motion_for_x;
2187 s->current_picture.motion_val[0][xy + 1][1] = motion_for_y;
2188 s->current_picture.motion_val[0][xy + wrap][0] = motion_for_x;
2189 s->current_picture.motion_val[0][xy + wrap][1] = motion_for_y;
2190 s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_for_x;
2191 s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_for_y;
2193 if(s->pict_type != B_TYPE){
2194 motion_back_x = motion_back_y = 0;
2197 s->current_picture.motion_val[1][xy][0] = motion_back_x;
2198 s->current_picture.motion_val[1][xy][1] = motion_back_y;
2199 s->current_picture.motion_val[1][xy + 1][0] = motion_back_x;
2200 s->current_picture.motion_val[1][xy + 1][1] = motion_back_y;
2201 s->current_picture.motion_val[1][xy + wrap][0] = motion_back_x;
2202 s->current_picture.motion_val[1][xy + wrap][1] = motion_back_y;
2203 s->current_picture.motion_val[1][xy + 1 + wrap][0] = motion_back_x;
2204 s->current_picture.motion_val[1][xy + 1 + wrap][1] = motion_back_y;
2211 MPV_decode_mb(s, s->block);
2213 if (++s->mb_x >= s->mb_width) {
2215 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2220 if(s->mb_y<<field_pic >= s->mb_height){
2221 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2223 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2224 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2225 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
2231 ff_init_block_index(s);
2234 /* skip mb handling */
2235 if (s->mb_skip_run == -1) {
2236 /* read again increment */
2239 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2241 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2246 s->mb_skip_run += 33;
2247 }else if(code == 35){
2248 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2249 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2252 goto eos; /* end of slice */
2254 /* otherwise, stuffing, nothing to do */
2256 s->mb_skip_run += code;
2262 eos: // end of slice
2263 *buf += get_bits_count(&s->gb)/8 - 1;
2264 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2269 * handles slice ends.
2270 * @return 1 if it seems to be the last slice of
2272 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2274 Mpeg1Context *s1 = avctx->priv_data;
2275 MpegEncContext *s = &s1->mpeg_enc_ctx;
2277 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2281 if(s->avctx->xvmc_acceleration)
2284 /* end of slice reached */
2285 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2288 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
2289 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2291 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG1;
2297 if (s->pict_type == B_TYPE || s->low_delay) {
2298 *pict= *(AVFrame*)s->current_picture_ptr;
2299 ff_print_debug_info(s, s->current_picture_ptr);
2301 s->picture_number++;
2302 /* latency of 1 frame for I and P frames */
2303 /* XXX: use another variable than picture_number */
2304 if (s->last_picture_ptr != NULL) {
2305 *pict= *(AVFrame*)s->last_picture_ptr;
2306 ff_print_debug_info(s, s->last_picture_ptr);
2316 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2317 uint8_t *buf, int buf_size)
2319 Mpeg1Context *s1 = avctx->priv_data;
2320 MpegEncContext *s = &s1->mpeg_enc_ctx;
2321 int width, height, i, v, j;
2324 init_get_bits(&s->gb, buf, buf_size*8);
2326 width = get_bits(&s->gb, 12);
2327 height = get_bits(&s->gb, 12);
2328 s->aspect_ratio_info= get_bits(&s->gb, 4);
2329 if (s->aspect_ratio_info == 0)
2331 aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
2332 avctx->sample_aspect_ratio= av_d2q(aspect, 255);
2334 s->frame_rate_index = get_bits(&s->gb, 4);
2335 if (s->frame_rate_index == 0)
2337 s->bit_rate = get_bits(&s->gb, 18) * 400;
2338 if (get_bits1(&s->gb) == 0) /* marker */
2340 if (width <= 0 || height <= 0 ||
2341 (width % 2) != 0 || (height % 2) != 0)
2343 if (width != s->width ||
2344 height != s->height) {
2345 /* start new mpeg1 context decoding */
2346 s->out_format = FMT_MPEG1;
2347 if (s1->mpeg_enc_ctx_allocated) {
2352 avctx->has_b_frames= 1;
2354 avctx->width = width;
2355 avctx->height = height;
2358 &avctx->frame_rate_base,
2359 frame_rate_tab[s->frame_rate_index],
2360 MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form
2363 avctx->bit_rate = s->bit_rate;
2365 //get_format() or set_video(width,height,aspect,pix_fmt);
2366 //until then pix_fmt may be changed right after codec init
2367 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2368 if( avctx->idct_algo == FF_IDCT_AUTO )
2369 avctx->idct_algo = FF_IDCT_SIMPLE;
2371 if (MPV_common_init(s) < 0)
2373 s1->mpeg_enc_ctx_allocated = 1;
2374 s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
2377 skip_bits(&s->gb, 10); /* vbv_buffer_size */
2378 skip_bits(&s->gb, 1);
2381 if (get_bits1(&s->gb)) {
2383 v = get_bits(&s->gb, 8);
2384 j = s->intra_scantable.permutated[i];
2385 s->intra_matrix[j] = v;
2386 s->chroma_intra_matrix[j] = v;
2389 dprintf("intra matrix present\n");
2391 dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
2396 int j= s->dsp.idct_permutation[i];
2397 v = ff_mpeg1_default_intra_matrix[i];
2398 s->intra_matrix[j] = v;
2399 s->chroma_intra_matrix[j] = v;
2402 if (get_bits1(&s->gb)) {
2404 v = get_bits(&s->gb, 8);
2405 j = s->intra_scantable.permutated[i];
2406 s->inter_matrix[j] = v;
2407 s->chroma_inter_matrix[j] = v;
2410 dprintf("non intra matrix present\n");
2412 dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
2417 int j= s->dsp.idct_permutation[i];
2418 v = ff_mpeg1_default_non_intra_matrix[i];
2419 s->inter_matrix[j] = v;
2420 s->chroma_inter_matrix[j] = v;
2424 /* we set mpeg2 parameters so that it emulates mpeg1 */
2425 s->progressive_sequence = 1;
2426 s->progressive_frame = 1;
2427 s->picture_structure = PICT_FRAME;
2428 s->frame_pred_frame_dct = 1;
2429 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2430 avctx->sub_id = 1; /* indicates mpeg1 */
2431 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2435 static int vcr2_init_sequence(AVCodecContext *avctx)
2437 Mpeg1Context *s1 = avctx->priv_data;
2438 MpegEncContext *s = &s1->mpeg_enc_ctx;
2441 /* start new mpeg1 context decoding */
2442 s->out_format = FMT_MPEG1;
2443 if (s1->mpeg_enc_ctx_allocated) {
2446 s->width = avctx->width;
2447 s->height = avctx->height;
2448 avctx->has_b_frames= 0; //true?
2452 //get_format() or set_video(width,height,aspect,pix_fmt);
2453 //until then pix_fmt may be changed right after codec init
2454 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2455 if( avctx->idct_algo == FF_IDCT_AUTO )
2456 avctx->idct_algo = FF_IDCT_SIMPLE;
2458 if (MPV_common_init(s) < 0)
2460 exchange_uv(s);//common init reset pblocks, so we swap them here
2461 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2462 s1->mpeg_enc_ctx_allocated = 1;
2465 int j= s->dsp.idct_permutation[i];
2466 v = ff_mpeg1_default_intra_matrix[i];
2467 s->intra_matrix[j] = v;
2468 s->chroma_intra_matrix[j] = v;
2470 v = ff_mpeg1_default_non_intra_matrix[i];
2471 s->inter_matrix[j] = v;
2472 s->chroma_inter_matrix[j] = v;
2475 s->progressive_sequence = 1;
2476 s->progressive_frame = 1;
2477 s->picture_structure = PICT_FRAME;
2478 s->frame_pred_frame_dct = 1;
2479 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2480 avctx->sub_id = 2; /* indicates mpeg2 */
2485 static void mpeg_decode_user_data(AVCodecContext *avctx,
2486 const uint8_t *buf, int buf_size)
2493 /* we parse the DTG active format information */
2495 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2509 avctx->dtg_active_format = p[0] & 0x0f;
2515 * finds the end of the current frame in the bitstream.
2516 * @return the position of the first byte of the next frame, or -1
2518 static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
2519 ParseContext *pc= &s->parse_context;
2526 if(!pc->frame_start_found){
2527 for(i=0; i<buf_size; i++){
2528 state= (state<<8) | buf[i];
2529 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2531 pc->frame_start_found=1;
2537 if(pc->frame_start_found){
2538 for(; i<buf_size; i++){
2539 state= (state<<8) | buf[i];
2540 if((state&0xFFFFFF00) == 0x100){
2541 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2542 pc->frame_start_found=0;
2550 return END_NOT_FOUND;
2553 /* handle buffering and image synchronisation */
2554 static int mpeg_decode_frame(AVCodecContext *avctx,
2555 void *data, int *data_size,
2556 uint8_t *buf, int buf_size)
2558 Mpeg1Context *s = avctx->priv_data;
2559 uint8_t *buf_end, *buf_ptr;
2560 int ret, start_code, input_size;
2561 AVFrame *picture = data;
2562 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2563 dprintf("fill_buffer\n");
2567 /* special case for last picture */
2568 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2569 *picture= *(AVFrame*)s2->next_picture_ptr;
2570 s2->next_picture_ptr= NULL;
2572 *data_size = sizeof(AVFrame);
2576 if(s2->flags&CODEC_FLAG_TRUNCATED){
2577 int next= mpeg1_find_frame_end(s2, buf, buf_size);
2579 if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
2584 buf_end = buf + buf_size;
2587 if (s->repeat_field % 2 == 1) {
2589 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2590 // s2->picture_number, s->repeat_field);
2591 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2592 *data_size = sizeof(AVPicture);
2598 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2599 vcr2_init_sequence(avctx);
2602 /* find start next code */
2603 start_code = find_start_code(&buf_ptr, buf_end);
2604 if (start_code < 0){
2605 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
2606 if (slice_end(avctx, picture)) {
2607 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2608 *data_size = sizeof(AVPicture);
2611 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2614 input_size = buf_end - buf_ptr;
2616 if(avctx->debug & FF_DEBUG_STARTCODE){
2617 av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
2620 /* prepare data for next start code */
2621 switch(start_code) {
2622 case SEQ_START_CODE:
2623 mpeg1_decode_sequence(avctx, buf_ptr,
2627 case PICTURE_START_CODE:
2628 /* we have a complete image : we try to decompress it */
2629 mpeg1_decode_picture(avctx,
2630 buf_ptr, input_size);
2632 case EXT_START_CODE:
2633 mpeg_decode_extension(avctx,
2634 buf_ptr, input_size);
2636 case USER_START_CODE:
2637 mpeg_decode_user_data(avctx,
2638 buf_ptr, input_size);
2640 case GOP_START_CODE:
2644 if (start_code >= SLICE_MIN_START_CODE &&
2645 start_code <= SLICE_MAX_START_CODE) {
2647 /* skip b frames if we dont have reference frames */
2648 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
2649 /* skip b frames if we are in a hurry */
2650 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2651 /* skip everything if we are in a hurry>=5 */
2652 if(avctx->hurry_up>=5) break;
2654 if (!s->mpeg_enc_ctx_allocated) break;
2656 ret = mpeg_decode_slice(avctx, picture,
2657 start_code, &buf_ptr, input_size);
2661 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2662 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);
2663 if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
2665 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);
2673 static int mpeg_decode_end(AVCodecContext *avctx)
2675 Mpeg1Context *s = avctx->priv_data;
2677 if (s->mpeg_enc_ctx_allocated)
2678 MPV_common_end(&s->mpeg_enc_ctx);
2682 AVCodec mpeg1video_decoder = {
2685 CODEC_ID_MPEG1VIDEO,
2686 sizeof(Mpeg1Context),
2691 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2692 .flush= ff_mpeg_flush,
2695 AVCodec mpeg2video_decoder = {
2698 CODEC_ID_MPEG2VIDEO,
2699 sizeof(Mpeg1Context),
2704 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2705 .flush= ff_mpeg_flush,
2709 AVCodec mpegvideo_decoder = {
2712 CODEC_ID_MPEG2VIDEO,
2713 sizeof(Mpeg1Context),
2718 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2719 .flush= ff_mpeg_flush,
2723 static int mpeg_mc_decode_init(AVCodecContext *avctx){
2726 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2728 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2729 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2731 mpeg_decode_init(avctx);
2732 s = avctx->priv_data;
2734 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2735 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2740 AVCodec mpeg_xvmc_decoder = {
2743 CODEC_ID_MPEG2VIDEO_XVMC,
2744 sizeof(Mpeg1Context),
2745 mpeg_mc_decode_init,
2749 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2754 /* this is ugly i know, but the alternative is too make
2755 hundreds of vars global and prefix them with ff_mpeg1_
2756 which is far uglier. */