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=1);
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 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
434 put_header(s, EXT_START_CODE);
435 put_bits(&s->pb, 4, 8); //pic ext
436 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
437 put_bits(&s->pb, 4, s->f_code);
438 put_bits(&s->pb, 4, s->f_code);
440 put_bits(&s->pb, 8, 255);
442 if (s->pict_type == B_TYPE) {
443 put_bits(&s->pb, 4, s->b_code);
444 put_bits(&s->pb, 4, s->b_code);
446 put_bits(&s->pb, 8, 255);
448 put_bits(&s->pb, 2, s->intra_dc_precision);
449 put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME);
450 put_bits(&s->pb, 1, s->top_field_first);
451 put_bits(&s->pb, 1, s->frame_pred_frame_dct= 1);
452 put_bits(&s->pb, 1, s->concealment_motion_vectors);
453 put_bits(&s->pb, 1, s->q_scale_type);
454 put_bits(&s->pb, 1, s->intra_vlc_format);
455 put_bits(&s->pb, 1, s->alternate_scan);
456 put_bits(&s->pb, 1, s->repeat_first_field);
457 put_bits(&s->pb, 1, s->chroma_420_type=1);
458 put_bits(&s->pb, 1, s->progressive_frame=1);
459 put_bits(&s->pb, 1, 0); //composite_display_flag
463 ff_mpeg1_encode_slice_header(s);
466 void mpeg1_encode_mb(MpegEncContext *s,
467 DCTELEM block[6][64],
468 int motion_x, int motion_y)
471 const int mb_x = s->mb_x;
472 const int mb_y = s->mb_y;
473 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
478 if (s->block_last_index[i] >= 0)
482 if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
483 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
484 (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) |
485 ((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))) {
487 s->qscale -= s->dquant;
493 assert(s->mb_skip_run == 0);
494 encode_mb_skip_run(s, s->mb_x);
496 encode_mb_skip_run(s, s->mb_skip_run);
499 if (s->pict_type == I_TYPE) {
500 if(s->dquant && cbp){
501 put_bits(&s->pb, 2, 1); /* macroblock_type : macroblock_quant = 1 */
502 put_bits(&s->pb, 5, s->qscale);
504 put_bits(&s->pb, 1, 1); /* macroblock_type : macroblock_quant = 0 */
505 s->qscale -= s->dquant;
507 s->misc_bits+= get_bits_diff(s);
509 } else if (s->mb_intra) {
510 if(s->dquant && cbp){
511 put_bits(&s->pb, 6, 0x01);
512 put_bits(&s->pb, 5, s->qscale);
514 put_bits(&s->pb, 5, 0x03);
515 s->qscale -= s->dquant;
517 s->misc_bits+= get_bits_diff(s);
519 s->last_mv[0][0][0] =
520 s->last_mv[0][0][1] = 0;
521 } else if (s->pict_type == P_TYPE) {
523 if (motion_x == 0 && motion_y == 0) {
525 put_bits(&s->pb, 5, 1); /* macroblock_pattern & quant */
526 put_bits(&s->pb, 5, s->qscale);
528 put_bits(&s->pb, 2, 1); /* macroblock_pattern only */
530 s->misc_bits+= get_bits_diff(s);
531 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
534 put_bits(&s->pb, 5, 2); /* motion + cbp */
535 put_bits(&s->pb, 5, s->qscale);
537 put_bits(&s->pb, 1, 1); /* motion + cbp */
539 s->misc_bits+= get_bits_diff(s);
540 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
541 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
542 s->mv_bits+= get_bits_diff(s);
543 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
546 put_bits(&s->pb, 3, 1); /* motion only */
547 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
548 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
549 s->qscale -= s->dquant;
550 s->mv_bits+= get_bits_diff(s);
554 { // RAL: All the following bloc added for B frames:
556 { // With coded bloc pattern
557 if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
558 { // Bi-directional motion
561 put_bits(&s->pb, 5, 2);
562 put_bits(&s->pb, 5, s->qscale);
564 else // Without QScale
565 put_bits(&s->pb, 2, 3);
566 s->misc_bits += get_bits_diff(s);
567 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
568 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
569 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
570 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
573 s->mv_bits += get_bits_diff(s);
574 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
576 else if (s->mv_dir == MV_DIR_BACKWARD)
580 put_bits(&s->pb, 6, 2);
581 put_bits(&s->pb, 5, s->qscale);
583 else // Without QScale
584 put_bits(&s->pb, 3, 3);
585 s->misc_bits += get_bits_diff(s);
586 mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
587 mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
589 s->mv_bits += get_bits_diff(s);
590 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
592 else if (s->mv_dir == MV_DIR_FORWARD)
596 put_bits(&s->pb, 6, 3);
597 put_bits(&s->pb, 5, s->qscale);
599 else // Without QScale
600 put_bits(&s->pb, 4, 3);
601 s->misc_bits += get_bits_diff(s);
602 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
603 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
605 s->mv_bits += get_bits_diff(s);
606 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
610 { // No coded bloc pattern
611 if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
612 { // Bi-directional motion
613 put_bits(&s->pb, 2, 2); /* backward & forward motion */
614 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
615 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
616 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
617 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
621 else if (s->mv_dir == MV_DIR_BACKWARD)
623 put_bits(&s->pb, 3, 2); /* backward motion only */
624 mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
625 mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
628 else if (s->mv_dir == MV_DIR_FORWARD)
630 put_bits(&s->pb, 4, 2); /* forward motion only */
631 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
632 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
635 s->qscale -= s->dquant;
636 s->mv_bits += get_bits_diff(s);
638 // End of bloc from RAL
641 if (cbp & (1 << (5 - i))) {
642 mpeg1_encode_block(s, block[i], i);
647 s->i_tex_bits+= get_bits_diff(s);
649 s->p_tex_bits+= get_bits_diff(s);
653 if (s->mv_dir & MV_DIR_FORWARD)
655 s->last_mv[0][0][0]= s->mv[0][0][0];
656 s->last_mv[0][0][1]= s->mv[0][0][1];
658 if (s->mv_dir & MV_DIR_BACKWARD)
660 s->last_mv[1][0][0]= s->mv[1][0][0];
661 s->last_mv[1][0][1]= s->mv[1][0][1];
665 // RAL: Parameter added: f_or_b_code
666 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
668 int code, bit_size, l, m, bits, range, sign;
674 mbMotionVectorTable[0][1],
675 mbMotionVectorTable[0][0]);
677 bit_size = f_or_b_code - 1;
678 range = 1 << bit_size;
679 /* modulo encoding */
684 } else if (val >= l) {
690 code = (val >> bit_size) + 1;
691 bits = val & (range - 1);
696 code = (val >> bit_size) + 1;
697 bits = val & (range - 1);
701 assert(code > 0 && code <= 16);
704 mbMotionVectorTable[code][1],
705 mbMotionVectorTable[code][0]);
707 put_bits(&s->pb, 1, sign);
709 put_bits(&s->pb, bit_size, bits);
714 void ff_mpeg1_encode_init(MpegEncContext *s)
730 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
731 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
734 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
736 /* build unified dc encoding tables */
737 for(i=-255; i<256; i++)
745 index = vlc_dc_table[adiff];
747 bits= vlc_dc_lum_bits[index] + index;
748 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
749 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
751 bits= vlc_dc_chroma_bits[index] + index;
752 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
753 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
756 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
758 for(f_code=1; f_code<=MAX_FCODE; f_code++){
759 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
762 if(mv==0) len= mbMotionVectorTable[0][1];
764 int val, bit_size, range, code;
766 bit_size = s->f_code - 1;
767 range = 1 << bit_size;
773 code = (val >> bit_size) + 1;
775 len= mbMotionVectorTable[code][1] + 1 + bit_size;
777 len= mbMotionVectorTable[16][1] + 2 + bit_size;
781 mv_penalty[f_code][mv+MAX_MV]= len;
786 for(f_code=MAX_FCODE; f_code>0; f_code--){
787 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
788 fcode_tab[mv+MAX_MV]= f_code;
792 s->me.mv_penalty= mv_penalty;
793 s->fcode_tab= fcode_tab;
794 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
801 s->intra_ac_vlc_length=
802 s->inter_ac_vlc_length=
803 s->intra_ac_vlc_last_length=
804 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
807 static inline void encode_dc(MpegEncContext *s, int diff, int component)
809 if (component == 0) {
812 mpeg1_lum_dc_uni[diff+255]&0xFF,
813 mpeg1_lum_dc_uni[diff+255]>>8);
817 mpeg1_chr_dc_uni[diff+255]&0xFF,
818 mpeg1_chr_dc_uni[diff+255]>>8);
822 static void mpeg1_encode_block(MpegEncContext *s,
826 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
828 // RLTable *rl = &rl_mpeg1;
830 last_index = s->block_last_index[n];
834 component = (n <= 3 ? 0 : n - 4 + 1);
835 dc = block[0]; /* overflow is impossible */
836 diff = dc - s->last_dc[component];
837 encode_dc(s, diff, component);
838 s->last_dc[component] = dc;
841 if (s->intra_vlc_format)
847 /* encode the first coefficient : needs to be done here because
848 it is handled slightly differently */
850 if (abs(level) == 1) {
851 code = ((uint32_t)level >> 31); /* the sign bit */
852 put_bits(&s->pb, 2, code | 0x02);
861 /* now quantify & encode AC coefs */
862 last_non_zero = i - 1;
864 for(;i<=last_index;i++) {
865 j = s->intra_scantable.permutated[i];
870 dprintf("level[%d]=%d\n", i, level);
872 /* encode using VLC */
874 run = i - last_non_zero - 1;
877 MASK_ABS(sign, alevel)
880 // code = get_rl_index(rl, 0, run, alevel);
881 if (alevel <= mpeg1_max_level[0][run]){
882 code= mpeg1_index_run[0][run] + alevel - 1;
883 /* store the vlc & sign at once */
884 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
886 /* escape seems to be pretty rare <5% so i dont optimize it */
887 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
888 /* escape: only clip in this case */
889 put_bits(&s->pb, 6, run);
890 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
892 put_bits(&s->pb, 8, level & 0xff);
895 put_bits(&s->pb, 16, 0x8001 + level + 255);
897 put_bits(&s->pb, 16, level & 0xffff);
901 put_bits(&s->pb, 12, level & 0xfff);
908 put_bits(&s->pb, 2, 0x2);
910 #endif //CONFIG_ENCODERS
912 /******************************************/
915 static VLC dc_lum_vlc;
916 static VLC dc_chroma_vlc;
918 static VLC mbincr_vlc;
919 static VLC mb_ptype_vlc;
920 static VLC mb_btype_vlc;
921 static VLC mb_pat_vlc;
923 static void init_vlcs()
930 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
931 vlc_dc_lum_bits, 1, 1,
932 vlc_dc_lum_code, 2, 2);
933 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
934 vlc_dc_chroma_bits, 1, 1,
935 vlc_dc_chroma_code, 2, 2);
936 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
937 &mbMotionVectorTable[0][1], 2, 1,
938 &mbMotionVectorTable[0][0], 2, 1);
939 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
940 &mbAddrIncrTable[0][1], 2, 1,
941 &mbAddrIncrTable[0][0], 2, 1);
942 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
943 &mbPatTable[0][1], 2, 1,
944 &mbPatTable[0][0], 2, 1);
946 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
947 &table_mb_ptype[0][1], 2, 1,
948 &table_mb_ptype[0][0], 2, 1);
949 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
950 &table_mb_btype[0][1], 2, 1,
951 &table_mb_btype[0][0], 2, 1);
955 init_2d_vlc_rl(&rl_mpeg1);
956 init_2d_vlc_rl(&rl_mpeg2);
960 static inline int get_dmv(MpegEncContext *s)
962 if(get_bits1(&s->gb))
963 return 1 - (get_bits1(&s->gb) << 1);
968 static inline int get_qscale(MpegEncContext *s)
970 int qscale = get_bits(&s->gb, 5);
971 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
972 if (s->q_scale_type) {
973 return non_linear_qscale[qscale];
981 /* motion type (for mpeg2) */
987 static int mpeg_decode_mb(MpegEncContext *s,
988 DCTELEM block[6][64])
990 int i, j, k, cbp, val, mb_type, motion_type;
992 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
994 assert(s->mb_skiped==0);
996 if (s->mb_skip_run-- != 0) {
997 if(s->pict_type == I_TYPE){
998 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1005 s->block_last_index[i] = -1;
1006 s->mv_type = MV_TYPE_16X16;
1007 if (s->pict_type == P_TYPE) {
1008 /* if P type, zero motion vector is implied */
1009 s->mv_dir = MV_DIR_FORWARD;
1010 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1011 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1012 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1014 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1016 /* if B type, reuse previous vectors and directions */
1017 s->mv[0][0][0] = s->last_mv[0][0][0];
1018 s->mv[0][0][1] = s->last_mv[0][0][1];
1019 s->mv[1][0][0] = s->last_mv[1][0][0];
1020 s->mv[1][0][1] = s->last_mv[1][0][1];
1022 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1023 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1024 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1026 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1033 switch(s->pict_type) {
1036 if (get_bits1(&s->gb) == 0) {
1037 if (get_bits1(&s->gb) == 0){
1038 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1041 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1043 mb_type = MB_TYPE_INTRA;
1047 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1049 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1052 mb_type = ptype2mb_type[ mb_type ];
1055 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1057 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1060 mb_type = btype2mb_type[ mb_type ];
1063 dprintf("mb_type=%x\n", mb_type);
1064 // motion_type = 0; /* avoid warning */
1065 if (IS_INTRA(mb_type)) {
1066 /* compute dct type */
1067 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1068 !s->frame_pred_frame_dct) {
1069 s->interlaced_dct = get_bits1(&s->gb);
1072 if (IS_QUANT(mb_type))
1073 s->qscale = get_qscale(s);
1075 if (s->concealment_motion_vectors) {
1076 /* just parse them */
1077 if (s->picture_structure != PICT_FRAME)
1078 skip_bits1(&s->gb); /* field select */
1080 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1081 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1082 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1083 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1085 skip_bits1(&s->gb); /* marker */
1087 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1090 //one 1 we memcpy blocks in xvmcvideo
1091 if(s->avctx->xvmc_acceleration > 1){
1092 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1099 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1101 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1106 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1111 if (mb_type & MB_TYPE_ZERO_MV){
1112 assert(mb_type & MB_TYPE_PAT);
1114 /* compute dct type */
1115 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1116 !s->frame_pred_frame_dct) {
1117 s->interlaced_dct = get_bits1(&s->gb);
1120 if (IS_QUANT(mb_type))
1121 s->qscale = get_qscale(s);
1123 s->mv_dir = MV_DIR_FORWARD;
1124 s->mv_type = MV_TYPE_16X16;
1125 s->last_mv[0][0][0] = 0;
1126 s->last_mv[0][0][1] = 0;
1127 s->last_mv[0][1][0] = 0;
1128 s->last_mv[0][1][1] = 0;
1132 assert(mb_type & MB_TYPE_L0L1);
1133 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1134 /* get additionnal motion vector type */
1135 if (s->frame_pred_frame_dct)
1136 motion_type = MT_FRAME;
1138 motion_type = get_bits(&s->gb, 2);
1141 /* compute dct type */
1142 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1143 !s->frame_pred_frame_dct && IS_PAT(mb_type)) {
1144 s->interlaced_dct = get_bits1(&s->gb);
1147 if (IS_QUANT(mb_type))
1148 s->qscale = get_qscale(s);
1150 /* motion vectors */
1153 if (USES_LIST(mb_type, i)) {
1154 s->mv_dir |= (MV_DIR_FORWARD >> i);
1155 dprintf("motion_type=%d\n", motion_type);
1156 switch(motion_type) {
1157 case MT_FRAME: /* or MT_16X8 */
1158 if (s->picture_structure == PICT_FRAME) {
1160 mb_type |= MB_TYPE_16x16;
1161 s->mv_type = MV_TYPE_16X16;
1162 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1163 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1164 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1165 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1166 /* full_pel: only for mpeg1 */
1167 if (s->full_pel[i]){
1168 s->mv[i][0][0] <<= 1;
1169 s->mv[i][0][1] <<= 1;
1173 mb_type |= MB_TYPE_16x8;
1174 s->mv_type = MV_TYPE_16X8;
1176 s->field_select[i][j] = get_bits1(&s->gb);
1178 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1179 s->last_mv[i][j][k]);
1180 s->last_mv[i][j][k] = val;
1181 s->mv[i][j][k] = val;
1187 s->mv_type = MV_TYPE_FIELD;
1188 if (s->picture_structure == PICT_FRAME) {
1189 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1191 s->field_select[i][j] = get_bits1(&s->gb);
1192 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1193 s->last_mv[i][j][0]);
1194 s->last_mv[i][j][0] = val;
1195 s->mv[i][j][0] = val;
1196 dprintf("fmx=%d\n", val);
1197 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1198 s->last_mv[i][j][1] >> 1);
1199 s->last_mv[i][j][1] = val << 1;
1200 s->mv[i][j][1] = val;
1201 dprintf("fmy=%d\n", val);
1204 mb_type |= MB_TYPE_16x16;
1205 s->field_select[i][0] = get_bits1(&s->gb);
1207 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1208 s->last_mv[i][0][k]);
1209 s->last_mv[i][0][k] = val;
1210 s->last_mv[i][1][k] = val;
1211 s->mv[i][0][k] = val;
1217 int dmx, dmy, mx, my, m;
1219 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1220 s->last_mv[i][0][0]);
1221 s->last_mv[i][0][0] = mx;
1222 s->last_mv[i][1][0] = mx;
1224 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1225 s->last_mv[i][0][1] >> 1);
1227 s->mv_type = MV_TYPE_DMV;
1230 s->last_mv[i][0][1] = my<<1;
1231 s->last_mv[i][1][1] = my<<1;
1233 s->mv[i][0][0] = mx;
1234 s->mv[i][0][1] = my;
1235 s->mv[i][1][0] = mx;//not used
1236 s->mv[i][1][1] = my;//not used
1238 if (s->picture_structure == PICT_FRAME) {
1239 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1241 //m = 1 + 2 * s->top_field_first;
1242 m = s->top_field_first ? 1 : 3;
1244 /* top -> top pred */
1245 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1246 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1248 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1249 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1251 mb_type |= MB_TYPE_16x16;
1253 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1254 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1255 if(s->picture_structure == PICT_TOP_FIELD)
1269 if (IS_PAT(mb_type)) {
1270 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1272 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1278 //on 1 we memcpy blocks in xvmcvideo
1279 if(s->avctx->xvmc_acceleration > 1){
1280 XVMC_pack_pblocks(s,cbp);
1287 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1290 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1293 s->block_last_index[i] = -1;
1300 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1303 s->block_last_index[i] = -1;
1310 s->block_last_index[i] = -1;
1314 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1319 /* as h263, but only 17 codes */
1320 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1322 int code, sign, val, l, shift;
1324 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1332 sign = get_bits1(&s->gb);
1336 val = (val - 1) << shift;
1337 val |= get_bits(&s->gb, shift);
1344 /* modulo decoding */
1346 val = ((val + l)&(l*2-1)) - l;
1350 static inline int decode_dc(GetBitContext *gb, int component)
1354 if (component == 0) {
1355 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1357 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1360 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1366 diff = get_xbits(gb, code);
1371 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1375 int level, dc, diff, i, j, run;
1377 RLTable *rl = &rl_mpeg1;
1378 uint8_t * const scantable= s->intra_scantable.permutated;
1379 const uint16_t *quant_matrix= s->intra_matrix;
1380 const int qscale= s->qscale;
1383 component = (n <= 3 ? 0 : n - 4 + 1);
1384 diff = decode_dc(&s->gb, component);
1387 dc = s->last_dc[component];
1389 s->last_dc[component] = dc;
1391 dprintf("dc=%d diff=%d\n", dc, diff);
1394 OPEN_READER(re, &s->gb);
1395 /* now quantify & encode AC coefs */
1397 UPDATE_CACHE(re, &s->gb);
1398 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1402 } else if(level != 0) {
1405 level= (level*qscale*quant_matrix[j])>>3;
1407 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1408 LAST_SKIP_BITS(re, &s->gb, 1);
1411 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1412 UPDATE_CACHE(re, &s->gb);
1413 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1414 if (level == -128) {
1415 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1416 } else if (level == 0) {
1417 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1423 level= (level*qscale*quant_matrix[j])>>3;
1427 level= (level*qscale*quant_matrix[j])>>3;
1432 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1438 CLOSE_READER(re, &s->gb);
1440 s->block_last_index[n] = i;
1444 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1448 int level, i, j, run;
1449 RLTable *rl = &rl_mpeg1;
1450 uint8_t * const scantable= s->intra_scantable.permutated;
1451 const uint16_t *quant_matrix= s->inter_matrix;
1452 const int qscale= s->qscale;
1456 OPEN_READER(re, &s->gb);
1458 /* special case for the first coef. no need to add a second vlc table */
1459 UPDATE_CACHE(re, &s->gb);
1460 v= SHOW_UBITS(re, &s->gb, 2);
1462 LAST_SKIP_BITS(re, &s->gb, 2);
1463 level= (3*qscale*quant_matrix[0])>>4;
1471 /* now quantify & encode AC coefs */
1473 UPDATE_CACHE(re, &s->gb);
1474 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1478 } else if(level != 0) {
1481 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1483 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1484 LAST_SKIP_BITS(re, &s->gb, 1);
1487 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1488 UPDATE_CACHE(re, &s->gb);
1489 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1490 if (level == -128) {
1491 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1492 } else if (level == 0) {
1493 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1499 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1503 level= ((level*2+1)*qscale*quant_matrix[j])>>4;
1508 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1514 CLOSE_READER(re, &s->gb);
1516 s->block_last_index[n] = i;
1520 /* Also does unquantization here, since I will never support mpeg2
1522 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1526 int level, i, j, run;
1527 RLTable *rl = &rl_mpeg1;
1528 uint8_t * const scantable= s->intra_scantable.permutated;
1529 const uint16_t *quant_matrix;
1530 const int qscale= s->qscale;
1537 OPEN_READER(re, &s->gb);
1540 quant_matrix = s->inter_matrix;
1542 quant_matrix = s->chroma_inter_matrix;
1544 /* special case for the first coef. no need to add a second vlc table */
1545 UPDATE_CACHE(re, &s->gb);
1546 v= SHOW_UBITS(re, &s->gb, 2);
1548 LAST_SKIP_BITS(re, &s->gb, 2);
1549 level= (3*qscale*quant_matrix[0])>>5;
1557 /* now quantify & encode AC coefs */
1559 UPDATE_CACHE(re, &s->gb);
1560 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1564 } else if(level != 0) {
1567 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1568 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1569 LAST_SKIP_BITS(re, &s->gb, 1);
1572 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1573 UPDATE_CACHE(re, &s->gb);
1574 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1579 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1582 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1586 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1593 CLOSE_READER(re, &s->gb);
1595 block[63] ^= (mismatch & 1);
1597 s->block_last_index[n] = i;
1601 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1605 int level, dc, diff, i, j, run;
1608 uint8_t * const scantable= s->intra_scantable.permutated;
1609 const uint16_t *quant_matrix;
1610 const int qscale= s->qscale;
1615 quant_matrix = s->intra_matrix;
1618 quant_matrix = s->chroma_intra_matrix;
1621 diff = decode_dc(&s->gb, component);
1624 dc = s->last_dc[component];
1626 s->last_dc[component] = dc;
1627 block[0] = dc << (3 - s->intra_dc_precision);
1628 dprintf("dc=%d\n", block[0]);
1629 mismatch = block[0] ^ 1;
1631 if (s->intra_vlc_format)
1637 OPEN_READER(re, &s->gb);
1638 /* now quantify & encode AC coefs */
1640 UPDATE_CACHE(re, &s->gb);
1641 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1645 } else if(level != 0) {
1648 level= (level*qscale*quant_matrix[j])>>4;
1649 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1650 LAST_SKIP_BITS(re, &s->gb, 1);
1653 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1654 UPDATE_CACHE(re, &s->gb);
1655 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1659 level= (-level*qscale*quant_matrix[j])>>4;
1662 level= (level*qscale*quant_matrix[j])>>4;
1666 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1673 CLOSE_READER(re, &s->gb);
1675 block[63]^= mismatch&1;
1677 s->block_last_index[n] = i;
1681 typedef struct Mpeg1Context {
1682 MpegEncContext mpeg_enc_ctx;
1683 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1684 int repeat_field; /* true if we must repeat the field */
1685 AVPanScan pan_scan; /** some temporary storage for the panscan */
1688 static int mpeg_decode_init(AVCodecContext *avctx)
1690 Mpeg1Context *s = avctx->priv_data;
1692 s->mpeg_enc_ctx.flags= avctx->flags;
1693 common_init(&s->mpeg_enc_ctx);
1696 s->mpeg_enc_ctx_allocated = 0;
1697 s->mpeg_enc_ctx.picture_number = 0;
1698 s->repeat_field = 0;
1699 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1703 /* return the 8 bit start code value and update the search
1704 state. Return -1 if no start code found */
1705 static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
1708 unsigned int state=0xFFFFFFFF, v;
1711 buf_ptr = *pbuf_ptr;
1712 while (buf_ptr < buf_end) {
1714 if (state == 0x000001) {
1715 state = ((state << 8) | v) & 0xffffff;
1719 state = ((state << 8) | v) & 0xffffff;
1723 *pbuf_ptr = buf_ptr;
1727 static int mpeg1_decode_picture(AVCodecContext *avctx,
1728 uint8_t *buf, int buf_size)
1730 Mpeg1Context *s1 = avctx->priv_data;
1731 MpegEncContext *s = &s1->mpeg_enc_ctx;
1734 init_get_bits(&s->gb, buf, buf_size*8);
1736 ref = get_bits(&s->gb, 10); /* temporal ref */
1737 s->pict_type = get_bits(&s->gb, 3);
1738 dprintf("pict_type=%d number=%d\n", s->pict_type, s->picture_number);
1740 skip_bits(&s->gb, 16);
1741 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
1742 s->full_pel[0] = get_bits1(&s->gb);
1743 f_code = get_bits(&s->gb, 3);
1746 s->mpeg_f_code[0][0] = f_code;
1747 s->mpeg_f_code[0][1] = f_code;
1749 if (s->pict_type == B_TYPE) {
1750 s->full_pel[1] = get_bits1(&s->gb);
1751 f_code = get_bits(&s->gb, 3);
1754 s->mpeg_f_code[1][0] = f_code;
1755 s->mpeg_f_code[1][1] = f_code;
1757 s->current_picture.pict_type= s->pict_type;
1758 s->current_picture.key_frame= s->pict_type == I_TYPE;
1766 static void mpeg_decode_sequence_extension(MpegEncContext *s)
1768 int horiz_size_ext, vert_size_ext;
1769 int bit_rate_ext, vbv_buf_ext;
1770 int frame_rate_ext_n, frame_rate_ext_d;
1773 skip_bits(&s->gb, 1); /* profil and level esc*/
1774 profile= get_bits(&s->gb, 3);
1775 level= get_bits(&s->gb, 4);
1776 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1777 skip_bits(&s->gb, 2); /* chroma_format */
1778 horiz_size_ext = get_bits(&s->gb, 2);
1779 vert_size_ext = get_bits(&s->gb, 2);
1780 s->width |= (horiz_size_ext << 12);
1781 s->height |= (vert_size_ext << 12);
1782 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1783 s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400;
1784 skip_bits1(&s->gb); /* marker */
1785 vbv_buf_ext = get_bits(&s->gb, 8);
1787 s->low_delay = get_bits1(&s->gb);
1788 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1790 frame_rate_ext_n = get_bits(&s->gb, 2);
1791 frame_rate_ext_d = get_bits(&s->gb, 5);
1793 &s->avctx->frame_rate,
1794 &s->avctx->frame_rate_base,
1795 frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1),
1796 MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1),
1799 dprintf("sequence extension\n");
1800 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1801 s->avctx->sub_id = 2; /* indicates mpeg2 found */
1803 if(s->aspect_ratio_info <= 1)
1804 s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
1806 s->avctx->sample_aspect_ratio=
1808 mpeg2_aspect[s->aspect_ratio_info],
1809 (AVRational){s->width, s->height}
1813 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1814 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d \n", profile, level);
1817 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1819 MpegEncContext *s= &s1->mpeg_enc_ctx;
1820 int color_description, w, h;
1822 skip_bits(&s->gb, 3); /* video format */
1823 color_description= get_bits1(&s->gb);
1824 if(color_description){
1825 skip_bits(&s->gb, 8); /* color primaries */
1826 skip_bits(&s->gb, 8); /* transfer_characteristics */
1827 skip_bits(&s->gb, 8); /* matrix_coefficients */
1829 w= get_bits(&s->gb, 14);
1830 skip_bits(&s->gb, 1); //marker
1831 h= get_bits(&s->gb, 14);
1832 skip_bits(&s->gb, 1); //marker
1834 s1->pan_scan.width= 16*w;
1835 s1->pan_scan.height=16*h;
1837 if(s->aspect_ratio_info > 1)
1838 s->avctx->sample_aspect_ratio=
1840 mpeg2_aspect[s->aspect_ratio_info],
1844 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1845 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1848 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1850 MpegEncContext *s= &s1->mpeg_enc_ctx;
1853 for(i=0; i<1; i++){ //FIXME count
1854 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1855 skip_bits(&s->gb, 1); //marker
1856 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1857 skip_bits(&s->gb, 1); //marker
1860 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1861 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1862 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1863 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1864 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1868 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1872 dprintf("matrix extension\n");
1874 if (get_bits1(&s->gb)) {
1876 v = get_bits(&s->gb, 8);
1877 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1878 s->intra_matrix[j] = v;
1879 s->chroma_intra_matrix[j] = v;
1882 if (get_bits1(&s->gb)) {
1884 v = get_bits(&s->gb, 8);
1885 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1886 s->inter_matrix[j] = v;
1887 s->chroma_inter_matrix[j] = v;
1890 if (get_bits1(&s->gb)) {
1892 v = get_bits(&s->gb, 8);
1893 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1894 s->chroma_intra_matrix[j] = v;
1897 if (get_bits1(&s->gb)) {
1899 v = get_bits(&s->gb, 8);
1900 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1901 s->chroma_inter_matrix[j] = v;
1906 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
1908 s->full_pel[0] = s->full_pel[1] = 0;
1909 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1910 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1911 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1912 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1913 s->intra_dc_precision = get_bits(&s->gb, 2);
1914 s->picture_structure = get_bits(&s->gb, 2);
1915 s->top_field_first = get_bits1(&s->gb);
1916 s->frame_pred_frame_dct = get_bits1(&s->gb);
1917 s->concealment_motion_vectors = get_bits1(&s->gb);
1918 s->q_scale_type = get_bits1(&s->gb);
1919 s->intra_vlc_format = get_bits1(&s->gb);
1920 s->alternate_scan = get_bits1(&s->gb);
1921 s->repeat_first_field = get_bits1(&s->gb);
1922 s->chroma_420_type = get_bits1(&s->gb);
1923 s->progressive_frame = get_bits1(&s->gb);
1925 if(s->picture_structure == PICT_FRAME)
1928 s->first_field ^= 1;
1929 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
1932 if(s->alternate_scan){
1933 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
1934 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
1935 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
1936 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
1938 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
1939 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
1940 ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
1941 ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
1944 /* composite display not parsed */
1945 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
1946 dprintf("picture_structure=%d\n", s->picture_structure);
1947 dprintf("top field first=%d\n", s->top_field_first);
1948 dprintf("repeat first field=%d\n", s->repeat_first_field);
1949 dprintf("conceal=%d\n", s->concealment_motion_vectors);
1950 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
1951 dprintf("alternate_scan=%d\n", s->alternate_scan);
1952 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1953 dprintf("progressive_frame=%d\n", s->progressive_frame);
1956 static void mpeg_decode_extension(AVCodecContext *avctx,
1957 uint8_t *buf, int buf_size)
1959 Mpeg1Context *s1 = avctx->priv_data;
1960 MpegEncContext *s = &s1->mpeg_enc_ctx;
1963 init_get_bits(&s->gb, buf, buf_size*8);
1965 ext_type = get_bits(&s->gb, 4);
1968 mpeg_decode_sequence_extension(s);
1971 mpeg_decode_sequence_display_extension(s1);
1974 mpeg_decode_quant_matrix_extension(s);
1977 mpeg_decode_picture_display_extension(s1);
1980 mpeg_decode_picture_coding_extension(s);
1985 static void exchange_uv(MpegEncContext *s){
1988 tmp = s->pblocks[4];
1989 s->pblocks[4] = s->pblocks[5];
1990 s->pblocks[5] = tmp;
1993 #define DECODE_SLICE_FATAL_ERROR -2
1994 #define DECODE_SLICE_ERROR -1
1995 #define DECODE_SLICE_OK 0
1999 * @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured<br>
2000 * DECODE_SLICE_ERROR if the slice is damaged<br>
2001 * DECODE_SLICE_OK if this slice is ok<br>
2003 static int mpeg_decode_slice(AVCodecContext *avctx,
2006 uint8_t **buf, int buf_size)
2008 Mpeg1Context *s1 = avctx->priv_data;
2009 MpegEncContext *s = &s1->mpeg_enc_ctx;
2011 const int field_pic= s->picture_structure != PICT_FRAME;
2013 s->resync_mb_x= s->mb_x =
2014 s->resync_mb_y= s->mb_y = -1;
2016 start_code = (start_code - 1) & 0xff;
2017 if (start_code >= s->mb_height){
2018 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", start_code, s->mb_height);
2022 ff_mpeg1_clean_buffers(s);
2023 s->interlaced_dct = 0;
2025 /* start frame decoding */
2026 if (s->first_slice) {
2027 if(s->first_field || s->picture_structure==PICT_FRAME){
2028 if(MPV_frame_start(s, avctx) < 0)
2029 return DECODE_SLICE_FATAL_ERROR;
2031 ff_er_frame_start(s);
2033 /* first check if we must repeat the frame */
2034 s->current_picture_ptr->repeat_pict = 0;
2035 if (s->repeat_first_field) {
2036 if (s->progressive_sequence) {
2037 if (s->top_field_first)
2038 s->current_picture_ptr->repeat_pict = 4;
2040 s->current_picture_ptr->repeat_pict = 2;
2041 } else if (s->progressive_frame) {
2042 s->current_picture_ptr->repeat_pict = 1;
2046 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2048 //printf("%d\n", s->current_picture_ptr->repeat_pict);
2050 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2051 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",
2052 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],
2053 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2054 s->progressive_sequence ? "pro" :"", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2055 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2056 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2058 }else{ //second field
2061 if(!s->current_picture_ptr){
2062 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2067 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2068 if(s->picture_structure == PICT_BOTTOM_FIELD){
2069 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2074 // MPV_frame_start will call this function too,
2075 // but we need to call it on every field
2076 if(s->avctx->xvmc_acceleration)
2077 XVMC_field_start(s,avctx);
2079 }//fi(s->first_slice)
2082 init_get_bits(&s->gb, *buf, buf_size*8);
2084 s->qscale = get_qscale(s);
2086 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2090 /* extra slice info */
2091 while (get_bits1(&s->gb) != 0) {
2092 skip_bits(&s->gb, 8);
2098 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2100 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2107 /* otherwise, stuffing, nothing to do */
2114 s->resync_mb_x= s->mb_x;
2115 s->resync_mb_y= s->mb_y = start_code;
2117 ff_init_block_index(s);
2121 //one 1 we memcpy blocks in xvmcvideo
2122 if(s->avctx->xvmc_acceleration > 1)
2123 XVMC_init_block(s);//set s->block
2126 s->dsp.clear_blocks(s->block[0]);
2128 ret = mpeg_decode_mb(s, s->block);
2130 dprintf("ret=%d\n", ret);
2134 if(s->motion_val && s->pict_type != B_TYPE){ //note motion_val is normally NULL unless we want to extract the MVs
2135 const int wrap = s->block_wrap[0];
2136 const int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
2137 int motion_x, motion_y;
2140 motion_x = motion_y = 0;
2141 }else if (s->mv_type == MV_TYPE_16X16) {
2142 motion_x = s->mv[0][0][0];
2143 motion_y = s->mv[0][0][1];
2144 } else /*if (s->mv_type == MV_TYPE_FIELD)*/ {
2145 motion_x = s->mv[0][0][0] + s->mv[0][1][0];
2146 motion_y = s->mv[0][0][1] + s->mv[0][1][1];
2147 motion_x = (motion_x>>1) | (motion_x&1);
2149 s->motion_val[xy][0] = motion_x;
2150 s->motion_val[xy][1] = motion_y;
2151 s->motion_val[xy + 1][0] = motion_x;
2152 s->motion_val[xy + 1][1] = motion_y;
2153 s->motion_val[xy + wrap][0] = motion_x;
2154 s->motion_val[xy + wrap][1] = motion_y;
2155 s->motion_val[xy + 1 + wrap][0] = motion_x;
2156 s->motion_val[xy + 1 + wrap][1] = motion_y;
2163 MPV_decode_mb(s, s->block);
2165 if (++s->mb_x >= s->mb_width) {
2167 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2172 if(s->mb_y<<field_pic >= s->mb_height){
2173 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2175 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2176 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2177 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
2183 ff_init_block_index(s);
2186 /* skip mb handling */
2187 if (s->mb_skip_run == -1) {
2188 /* read again increment */
2191 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2193 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2198 s->mb_skip_run += 33;
2199 }else if(code == 35){
2200 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2201 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2204 goto eos; /* end of slice */
2206 /* otherwise, stuffing, nothing to do */
2208 s->mb_skip_run += code;
2214 eos: // end of slice
2215 *buf += get_bits_count(&s->gb)/8 - 1;
2216 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2221 * handles slice ends.
2222 * @return 1 if it seems to be the last slice of
2224 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2226 Mpeg1Context *s1 = avctx->priv_data;
2227 MpegEncContext *s = &s1->mpeg_enc_ctx;
2229 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2233 if(s->avctx->xvmc_acceleration)
2236 /* end of slice reached */
2237 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2240 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
2241 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2243 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG1;
2249 if (s->pict_type == B_TYPE || s->low_delay) {
2250 *pict= *(AVFrame*)s->current_picture_ptr;
2251 ff_print_debug_info(s, s->current_picture_ptr);
2253 s->picture_number++;
2254 /* latency of 1 frame for I and P frames */
2255 /* XXX: use another variable than picture_number */
2256 if (s->last_picture_ptr != NULL) {
2257 *pict= *(AVFrame*)s->last_picture_ptr;
2258 ff_print_debug_info(s, s->last_picture_ptr);
2268 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2269 uint8_t *buf, int buf_size)
2271 Mpeg1Context *s1 = avctx->priv_data;
2272 MpegEncContext *s = &s1->mpeg_enc_ctx;
2273 int width, height, i, v, j;
2276 init_get_bits(&s->gb, buf, buf_size*8);
2278 width = get_bits(&s->gb, 12);
2279 height = get_bits(&s->gb, 12);
2280 s->aspect_ratio_info= get_bits(&s->gb, 4);
2281 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
2282 aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
2283 if(aspect!=0.0) avctx->sample_aspect_ratio= av_d2q(aspect, 255);
2286 s->frame_rate_index = get_bits(&s->gb, 4);
2287 if (s->frame_rate_index == 0)
2289 s->bit_rate = get_bits(&s->gb, 18) * 400;
2290 if (get_bits1(&s->gb) == 0) /* marker */
2292 if (width <= 0 || height <= 0 ||
2293 (width % 2) != 0 || (height % 2) != 0)
2295 if (width != s->width ||
2296 height != s->height) {
2297 /* start new mpeg1 context decoding */
2298 s->out_format = FMT_MPEG1;
2299 if (s1->mpeg_enc_ctx_allocated) {
2304 avctx->has_b_frames= 1;
2306 avctx->width = width;
2307 avctx->height = height;
2310 &avctx->frame_rate_base,
2311 frame_rate_tab[s->frame_rate_index],
2312 MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form
2315 avctx->bit_rate = s->bit_rate;
2317 //get_format() or set_video(width,height,aspect,pix_fmt);
2318 //until then pix_fmt may be changed right after codec init
2319 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2320 if( avctx->idct_algo == FF_IDCT_AUTO )
2321 avctx->idct_algo = FF_IDCT_SIMPLE;
2323 if (MPV_common_init(s) < 0)
2325 s1->mpeg_enc_ctx_allocated = 1;
2326 s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
2329 skip_bits(&s->gb, 10); /* vbv_buffer_size */
2330 skip_bits(&s->gb, 1);
2333 if (get_bits1(&s->gb)) {
2335 v = get_bits(&s->gb, 8);
2336 j = s->intra_scantable.permutated[i];
2337 s->intra_matrix[j] = v;
2338 s->chroma_intra_matrix[j] = v;
2341 dprintf("intra matrix present\n");
2343 dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
2348 int j= s->dsp.idct_permutation[i];
2349 v = ff_mpeg1_default_intra_matrix[i];
2350 s->intra_matrix[j] = v;
2351 s->chroma_intra_matrix[j] = v;
2354 if (get_bits1(&s->gb)) {
2356 v = get_bits(&s->gb, 8);
2357 j = s->intra_scantable.permutated[i];
2358 s->inter_matrix[j] = v;
2359 s->chroma_inter_matrix[j] = v;
2362 dprintf("non intra matrix present\n");
2364 dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
2369 int j= s->dsp.idct_permutation[i];
2370 v = ff_mpeg1_default_non_intra_matrix[i];
2371 s->inter_matrix[j] = v;
2372 s->chroma_inter_matrix[j] = v;
2376 /* we set mpeg2 parameters so that it emulates mpeg1 */
2377 s->progressive_sequence = 1;
2378 s->progressive_frame = 1;
2379 s->picture_structure = PICT_FRAME;
2380 s->frame_pred_frame_dct = 1;
2381 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2382 avctx->sub_id = 1; /* indicates mpeg1 */
2386 static int vcr2_init_sequence(AVCodecContext *avctx)
2388 Mpeg1Context *s1 = avctx->priv_data;
2389 MpegEncContext *s = &s1->mpeg_enc_ctx;
2392 /* start new mpeg1 context decoding */
2393 s->out_format = FMT_MPEG1;
2394 if (s1->mpeg_enc_ctx_allocated) {
2397 s->width = avctx->width;
2398 s->height = avctx->height;
2399 avctx->has_b_frames= 0; //true?
2403 //get_format() or set_video(width,height,aspect,pix_fmt);
2404 //until then pix_fmt may be changed right after codec init
2405 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2406 if( avctx->idct_algo == FF_IDCT_AUTO )
2407 avctx->idct_algo = FF_IDCT_SIMPLE;
2409 if (MPV_common_init(s) < 0)
2411 exchange_uv(s);//common init reset pblocks, so we swap them here
2412 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2413 s1->mpeg_enc_ctx_allocated = 1;
2416 int j= s->dsp.idct_permutation[i];
2417 v = ff_mpeg1_default_intra_matrix[i];
2418 s->intra_matrix[j] = v;
2419 s->chroma_intra_matrix[j] = v;
2421 v = ff_mpeg1_default_non_intra_matrix[i];
2422 s->inter_matrix[j] = v;
2423 s->chroma_inter_matrix[j] = v;
2426 s->progressive_sequence = 1;
2427 s->progressive_frame = 1;
2428 s->picture_structure = PICT_FRAME;
2429 s->frame_pred_frame_dct = 1;
2430 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2431 avctx->sub_id = 2; /* indicates mpeg2 */
2436 static void mpeg_decode_user_data(AVCodecContext *avctx,
2437 const uint8_t *buf, int buf_size)
2444 /* we parse the DTG active format information */
2446 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2460 avctx->dtg_active_format = p[0] & 0x0f;
2466 * finds the end of the current frame in the bitstream.
2467 * @return the position of the first byte of the next frame, or -1
2469 static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
2470 ParseContext *pc= &s->parse_context;
2477 if(!pc->frame_start_found){
2478 for(i=0; i<buf_size; i++){
2479 state= (state<<8) | buf[i];
2480 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2482 pc->frame_start_found=1;
2488 if(pc->frame_start_found){
2489 for(; i<buf_size; i++){
2490 state= (state<<8) | buf[i];
2491 if((state&0xFFFFFF00) == 0x100){
2492 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2493 pc->frame_start_found=0;
2501 return END_NOT_FOUND;
2504 /* handle buffering and image synchronisation */
2505 static int mpeg_decode_frame(AVCodecContext *avctx,
2506 void *data, int *data_size,
2507 uint8_t *buf, int buf_size)
2509 Mpeg1Context *s = avctx->priv_data;
2510 uint8_t *buf_end, *buf_ptr;
2511 int ret, start_code, input_size;
2512 AVFrame *picture = data;
2513 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2514 dprintf("fill_buffer\n");
2518 /* special case for last picture */
2519 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2520 *picture= *(AVFrame*)s2->next_picture_ptr;
2521 s2->next_picture_ptr= NULL;
2523 *data_size = sizeof(AVFrame);
2527 if(s2->flags&CODEC_FLAG_TRUNCATED){
2528 int next= mpeg1_find_frame_end(s2, buf, buf_size);
2530 if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
2535 buf_end = buf + buf_size;
2538 if (s->repeat_field % 2 == 1) {
2540 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2541 // s2->picture_number, s->repeat_field);
2542 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2543 *data_size = sizeof(AVPicture);
2549 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2550 vcr2_init_sequence(avctx);
2553 /* find start next code */
2554 start_code = find_start_code(&buf_ptr, buf_end);
2555 if (start_code < 0){
2556 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
2557 if (slice_end(avctx, picture)) {
2558 if(s2->last_picture_ptr) //FIXME merge with the stuff in mpeg_decode_slice
2559 *data_size = sizeof(AVPicture);
2562 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2565 input_size = buf_end - buf_ptr;
2567 if(avctx->debug & FF_DEBUG_STARTCODE){
2568 av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
2571 /* prepare data for next start code */
2572 switch(start_code) {
2573 case SEQ_START_CODE:
2574 mpeg1_decode_sequence(avctx, buf_ptr,
2578 case PICTURE_START_CODE:
2579 /* we have a complete image : we try to decompress it */
2580 mpeg1_decode_picture(avctx,
2581 buf_ptr, input_size);
2583 case EXT_START_CODE:
2584 mpeg_decode_extension(avctx,
2585 buf_ptr, input_size);
2587 case USER_START_CODE:
2588 mpeg_decode_user_data(avctx,
2589 buf_ptr, input_size);
2591 case GOP_START_CODE:
2595 if (start_code >= SLICE_MIN_START_CODE &&
2596 start_code <= SLICE_MAX_START_CODE) {
2598 /* skip b frames if we dont have reference frames */
2599 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
2600 /* skip b frames if we are in a hurry */
2601 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2602 /* skip everything if we are in a hurry>=5 */
2603 if(avctx->hurry_up>=5) break;
2605 if (!s->mpeg_enc_ctx_allocated) break;
2607 ret = mpeg_decode_slice(avctx, picture,
2608 start_code, &buf_ptr, input_size);
2612 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2613 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);
2614 if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
2616 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);
2624 static int mpeg_decode_end(AVCodecContext *avctx)
2626 Mpeg1Context *s = avctx->priv_data;
2628 if (s->mpeg_enc_ctx_allocated)
2629 MPV_common_end(&s->mpeg_enc_ctx);
2633 AVCodec mpeg1video_decoder = {
2636 CODEC_ID_MPEG1VIDEO,
2637 sizeof(Mpeg1Context),
2642 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2643 .flush= ff_mpeg_flush,
2646 AVCodec mpeg2video_decoder = {
2649 CODEC_ID_MPEG2VIDEO,
2650 sizeof(Mpeg1Context),
2655 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2656 .flush= ff_mpeg_flush,
2660 AVCodec mpegvideo_decoder = {
2663 CODEC_ID_MPEG2VIDEO,
2664 sizeof(Mpeg1Context),
2669 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2670 .flush= ff_mpeg_flush,
2674 static int mpeg_mc_decode_init(AVCodecContext *avctx){
2677 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2679 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2680 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2682 mpeg_decode_init(avctx);
2683 s = avctx->priv_data;
2685 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2686 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2691 AVCodec mpeg_xvmc_decoder = {
2694 CODEC_ID_MPEG2VIDEO_XVMC,
2695 sizeof(Mpeg1Context),
2696 mpeg_mc_decode_init,
2700 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2705 /* this is ugly i know, but the alternative is too make
2706 hundreds of vars global and prefix them with ff_mpeg1_
2707 which is far uglier. */