2 * MPEG1 codec / MPEG2 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31 #include "mpegvideo.h"
33 #include "mpeg12data.h"
40 #define SEQ_END_CODE 0x000001b7
41 #define SEQ_START_CODE 0x000001b3
42 #define GOP_START_CODE 0x000001b8
43 #define PICTURE_START_CODE 0x00000100
44 #define SLICE_MIN_START_CODE 0x00000101
45 #define SLICE_MAX_START_CODE 0x000001af
46 #define EXT_START_CODE 0x000001b5
47 #define USER_START_CODE 0x000001b2
51 #define MBINCR_VLC_BITS 9
52 #define MB_PAT_VLC_BITS 9
53 #define MB_PTYPE_VLC_BITS 6
54 #define MB_BTYPE_VLC_BITS 6
55 #define TEX_VLC_BITS 9
57 #ifdef CONFIG_ENCODERS
58 static void mpeg1_encode_block(MpegEncContext *s,
61 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
62 #endif //CONFIG_ENCODERS
63 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
66 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
69 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
70 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
73 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
76 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
77 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
78 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
79 static void exchange_uv(MpegEncContext *s);
82 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
83 extern int XVMC_field_end(MpegEncContext *s);
84 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
85 extern void XVMC_init_block(MpegEncContext *s);//set s->block
88 static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
89 static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
90 static const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
91 static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
92 PIX_FMT_XVMC_MPEG2_IDCT,
93 PIX_FMT_XVMC_MPEG2_MC,
95 #ifdef CONFIG_ENCODERS
96 static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
97 static uint8_t fcode_tab[MAX_MV*2+1];
99 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
100 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
102 /* simple include everything table for dc, first byte is bits number next 3 are code*/
103 static uint32_t mpeg1_lum_dc_uni[512];
104 static uint32_t mpeg1_chr_dc_uni[512];
106 static uint8_t mpeg1_index_run[2][64];
107 static int8_t mpeg1_max_level[2][64];
108 #endif //CONFIG_ENCODERS
110 static void init_2d_vlc_rl(RLTable *rl, int use_static)
114 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
115 &rl->table_vlc[0][1], 4, 2,
116 &rl->table_vlc[0][0], 4, 2, use_static);
119 rl->rl_vlc[0]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
121 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
123 for(i=0; i<rl->vlc.table_size; i++){
124 int code= rl->vlc.table[i][0];
125 int len = rl->vlc.table[i][1];
128 if(len==0){ // illegal code
131 }else if(len<0){ //more bits needed
135 if(code==rl->n){ //esc
138 }else if(code==rl->n+1){ //eob
142 run= rl->table_run [code] + 1;
143 level= rl->table_level[code];
146 rl->rl_vlc[0][i].len= len;
147 rl->rl_vlc[0][i].level= level;
148 rl->rl_vlc[0][i].run= run;
152 #ifdef CONFIG_ENCODERS
153 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
156 for(i=0; i<128; i++){
159 for(run=0; run<64; run++){
162 int alevel= FFABS(level);
163 int sign= (level>>31)&1;
165 if (alevel > rl->max_level[0][run])
168 code= rl->index_run[0][run] + alevel - 1;
170 if (code < 111 /* rl->n */) {
171 /* store the vlc & sign at once */
172 len= rl->table_vlc[code][1]+1;
173 bits= (rl->table_vlc[code][0]<<1) + sign;
175 len= rl->table_vlc[111/*rl->n*/][1]+6;
176 bits= rl->table_vlc[111/*rl->n*/][0]<<6;
186 bits|= 0x8001 + level + 255;
188 bits|= level & 0xffff;
193 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
199 static int find_frame_rate_index(MpegEncContext *s){
201 int64_t dmin= INT64_MAX;
205 int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
206 int64_t n1= 1001LL*s->avctx->time_base.den;
207 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
212 s->frame_rate_index= i;
221 static int encode_init(AVCodecContext *avctx)
223 MpegEncContext *s = avctx->priv_data;
225 if(MPV_encode_init(avctx) < 0)
228 if(find_frame_rate_index(s) < 0){
229 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
230 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
233 av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
237 if(avctx->profile == FF_PROFILE_UNKNOWN)
238 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
240 if(avctx->level == FF_LEVEL_UNKNOWN)
241 avctx->level = s->chroma_format == CHROMA_420 ? 8 : 5;
243 if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
244 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
251 static void put_header(MpegEncContext *s, int header)
253 align_put_bits(&s->pb);
254 put_bits(&s->pb, 16, header>>16);
255 put_bits(&s->pb, 16, header&0xFFFF);
258 /* put sequence header if needed */
259 static void mpeg1_encode_sequence_header(MpegEncContext *s)
261 unsigned int vbv_buffer_size;
265 float best_aspect_error= 1E10;
266 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
267 int constraint_parameter_flag;
269 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
271 if (s->current_picture.key_frame) {
272 AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
274 /* mpeg1 header repeated every gop */
275 put_header(s, SEQ_START_CODE);
277 put_bits(&s->pb, 12, s->width);
278 put_bits(&s->pb, 12, s->height);
281 float error= aspect_ratio;
282 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
283 error-= 1.0/mpeg1_aspect[i];
285 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
289 if(error < best_aspect_error){
290 best_aspect_error= error;
291 s->aspect_ratio_info= i;
295 put_bits(&s->pb, 4, s->aspect_ratio_info);
296 put_bits(&s->pb, 4, s->frame_rate_index);
298 if(s->avctx->rc_max_rate){
299 v = (s->avctx->rc_max_rate + 399) / 400;
300 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
306 if(s->avctx->rc_buffer_size)
307 vbv_buffer_size = s->avctx->rc_buffer_size;
309 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
310 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
311 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
313 put_bits(&s->pb, 18, v & 0x3FFFF);
314 put_bits(&s->pb, 1, 1); /* marker */
315 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
317 constraint_parameter_flag=
318 s->width <= 768 && s->height <= 576 &&
319 s->mb_width * s->mb_height <= 396 &&
320 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
321 framerate.num <= framerate.den*30 &&
322 s->avctx->me_range && s->avctx->me_range < 128 &&
323 vbv_buffer_size <= 20 &&
325 s->codec_id == CODEC_ID_MPEG1VIDEO;
327 put_bits(&s->pb, 1, constraint_parameter_flag);
329 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
330 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
332 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
333 put_header(s, EXT_START_CODE);
334 put_bits(&s->pb, 4, 1); //seq ext
336 put_bits(&s->pb, 1, s->chroma_format == CHROMA_422); //escx
338 put_bits(&s->pb, 3, s->avctx->profile); //profile
339 put_bits(&s->pb, 4, s->avctx->level); //level
341 put_bits(&s->pb, 1, s->progressive_sequence);
342 put_bits(&s->pb, 2, s->chroma_format);
343 put_bits(&s->pb, 2, 0); //horizontal size ext
344 put_bits(&s->pb, 2, 0); //vertical size ext
345 put_bits(&s->pb, 12, v>>18); //bitrate ext
346 put_bits(&s->pb, 1, 1); //marker
347 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
348 put_bits(&s->pb, 1, s->low_delay);
349 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
350 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
353 put_header(s, GOP_START_CODE);
354 put_bits(&s->pb, 1, !!(s->avctx->flags & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
355 /* time code : we must convert from the real frame rate to a
356 fake mpeg frame rate in case of low frame rate */
357 fps = (framerate.num + framerate.den/2)/ framerate.den;
358 time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
360 s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
361 if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
362 /* only works for NTSC 29.97 */
363 int d = time_code / 17982;
364 int m = time_code % 17982;
365 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
366 time_code += 18 * d + 2 * ((m - 2) / 1798);
368 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
369 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
370 put_bits(&s->pb, 1, 1);
371 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
372 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
373 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
374 put_bits(&s->pb, 1, 0); /* broken link */
378 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
380 put_bits(&s->pb, 11, 0x008);
383 put_bits(&s->pb, mbAddrIncrTable[run][1],
384 mbAddrIncrTable[run][0]);
386 #endif //CONFIG_ENCODERS
388 static void common_init(MpegEncContext *s)
392 s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
396 void ff_mpeg1_clean_buffers(MpegEncContext *s){
397 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
398 s->last_dc[1] = s->last_dc[0];
399 s->last_dc[2] = s->last_dc[0];
400 memset(s->last_mv, 0, sizeof(s->last_mv));
403 #ifdef CONFIG_ENCODERS
405 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
406 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
407 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
408 put_bits(&s->pb, 1, 0); /* slice extra information */
411 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
413 mpeg1_encode_sequence_header(s);
415 /* mpeg1 picture header */
416 put_header(s, PICTURE_START_CODE);
417 /* temporal reference */
419 // RAL: s->picture_number instead of s->fake_picture_number
420 put_bits(&s->pb, 10, (s->picture_number -
421 s->gop_picture_number) & 0x3ff);
422 put_bits(&s->pb, 3, s->pict_type);
424 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
425 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
427 // RAL: Forward f_code also needed for B frames
428 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
429 put_bits(&s->pb, 1, 0); /* half pel coordinates */
430 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
431 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
433 put_bits(&s->pb, 3, 7); /* forward_f_code */
436 // RAL: Backward f_code necessary for B frames
437 if (s->pict_type == B_TYPE) {
438 put_bits(&s->pb, 1, 0); /* half pel coordinates */
439 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
440 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
442 put_bits(&s->pb, 3, 7); /* backward_f_code */
445 put_bits(&s->pb, 1, 0); /* extra bit picture */
447 s->frame_pred_frame_dct = 1;
448 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
449 put_header(s, EXT_START_CODE);
450 put_bits(&s->pb, 4, 8); //pic ext
451 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
452 put_bits(&s->pb, 4, s->f_code);
453 put_bits(&s->pb, 4, s->f_code);
455 put_bits(&s->pb, 8, 255);
457 if (s->pict_type == B_TYPE) {
458 put_bits(&s->pb, 4, s->b_code);
459 put_bits(&s->pb, 4, s->b_code);
461 put_bits(&s->pb, 8, 255);
463 put_bits(&s->pb, 2, s->intra_dc_precision);
465 assert(s->picture_structure == PICT_FRAME);
466 put_bits(&s->pb, 2, s->picture_structure);
467 if (s->progressive_sequence) {
468 put_bits(&s->pb, 1, 0); /* no repeat */
470 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
472 /* XXX: optimize the generation of this flag with entropy
474 s->frame_pred_frame_dct = s->progressive_sequence;
476 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
477 put_bits(&s->pb, 1, s->concealment_motion_vectors);
478 put_bits(&s->pb, 1, s->q_scale_type);
479 put_bits(&s->pb, 1, s->intra_vlc_format);
480 put_bits(&s->pb, 1, s->alternate_scan);
481 put_bits(&s->pb, 1, s->repeat_first_field);
482 s->progressive_frame = s->progressive_sequence;
483 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
484 put_bits(&s->pb, 1, s->progressive_frame);
485 put_bits(&s->pb, 1, 0); //composite_display_flag
487 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
490 put_header(s, USER_START_CODE);
491 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
492 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
497 ff_mpeg1_encode_slice_header(s);
500 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
501 int has_mv, int field_motion)
503 put_bits(&s->pb, n, bits);
504 if (!s->frame_pred_frame_dct) {
506 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
507 put_bits(&s->pb, 1, s->interlaced_dct);
511 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
512 DCTELEM block[6][64],
513 int motion_x, int motion_y,
517 const int mb_x = s->mb_x;
518 const int mb_y = s->mb_y;
519 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
523 for(i=0;i<mb_block_count;i++) {
524 if (s->block_last_index[i] >= 0)
525 cbp |= 1 << (mb_block_count - 1 - i);
528 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
529 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
530 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
531 (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) |
532 ((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))) {
534 s->qscale -= s->dquant;
538 if(s->pict_type == P_TYPE){
539 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
540 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
544 assert(s->mb_skip_run == 0);
545 encode_mb_skip_run(s, s->mb_x);
547 encode_mb_skip_run(s, s->mb_skip_run);
550 if (s->pict_type == I_TYPE) {
551 if(s->dquant && cbp){
552 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
553 put_bits(&s->pb, 5, s->qscale);
555 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
556 s->qscale -= s->dquant;
558 s->misc_bits+= get_bits_diff(s);
560 } else if (s->mb_intra) {
561 if(s->dquant && cbp){
562 put_mb_modes(s, 6, 0x01, 0, 0);
563 put_bits(&s->pb, 5, s->qscale);
565 put_mb_modes(s, 5, 0x03, 0, 0);
566 s->qscale -= s->dquant;
568 s->misc_bits+= get_bits_diff(s);
570 memset(s->last_mv, 0, sizeof(s->last_mv));
571 } else if (s->pict_type == P_TYPE) {
572 if(s->mv_type == MV_TYPE_16X16){
574 if ((motion_x|motion_y) == 0) {
576 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
577 put_bits(&s->pb, 5, s->qscale);
579 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
581 s->misc_bits+= get_bits_diff(s);
584 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
585 put_bits(&s->pb, 5, s->qscale);
587 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
589 s->misc_bits+= get_bits_diff(s);
590 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
591 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
592 s->mv_bits+= get_bits_diff(s);
595 put_bits(&s->pb, 3, 1); /* motion only */
596 if (!s->frame_pred_frame_dct)
597 put_bits(&s->pb, 2, 2); /* motion_type: frame */
598 s->misc_bits+= get_bits_diff(s);
599 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
600 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
601 s->qscale -= s->dquant;
602 s->mv_bits+= get_bits_diff(s);
604 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
605 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
607 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
611 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
612 put_bits(&s->pb, 5, s->qscale);
614 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
617 put_bits(&s->pb, 3, 1); /* motion only */
618 put_bits(&s->pb, 2, 1); /* motion_type: field */
619 s->qscale -= s->dquant;
621 s->misc_bits+= get_bits_diff(s);
623 put_bits(&s->pb, 1, s->field_select[0][i]);
624 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
625 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
626 s->last_mv[0][i][0]= s->mv[0][i][0];
627 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
629 s->mv_bits+= get_bits_diff(s);
632 if (s->chroma_y_shift) {
633 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
635 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
636 put_bits(&s->pb, 2, cbp & 3);
641 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
643 if(s->mv_type == MV_TYPE_16X16){
644 if (cbp){ // With coded bloc pattern
646 if(s->mv_dir == MV_DIR_FORWARD)
647 put_mb_modes(s, 6, 3, 1, 0);
649 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
650 put_bits(&s->pb, 5, s->qscale);
652 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
654 }else{ // No coded bloc pattern
655 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
656 if (!s->frame_pred_frame_dct)
657 put_bits(&s->pb, 2, 2); /* motion_type: frame */
658 s->qscale -= s->dquant;
660 s->misc_bits += get_bits_diff(s);
661 if (s->mv_dir&MV_DIR_FORWARD){
662 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
663 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
664 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
665 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
668 if (s->mv_dir&MV_DIR_BACKWARD){
669 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
670 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
671 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
672 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
676 assert(s->mv_type == MV_TYPE_FIELD);
677 assert(!s->frame_pred_frame_dct);
678 if (cbp){ // With coded bloc pattern
680 if(s->mv_dir == MV_DIR_FORWARD)
681 put_mb_modes(s, 6, 3, 1, 1);
683 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
684 put_bits(&s->pb, 5, s->qscale);
686 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
688 }else{ // No coded bloc pattern
689 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
690 put_bits(&s->pb, 2, 1); /* motion_type: field */
691 s->qscale -= s->dquant;
693 s->misc_bits += get_bits_diff(s);
694 if (s->mv_dir&MV_DIR_FORWARD){
696 put_bits(&s->pb, 1, s->field_select[0][i]);
697 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
698 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
699 s->last_mv[0][i][0]= s->mv[0][i][0];
700 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
704 if (s->mv_dir&MV_DIR_BACKWARD){
706 put_bits(&s->pb, 1, s->field_select[1][i]);
707 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
708 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
709 s->last_mv[1][i][0]= s->mv[1][i][0];
710 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
715 s->mv_bits += get_bits_diff(s);
717 if (s->chroma_y_shift) {
718 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
720 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
721 put_bits(&s->pb, 2, cbp & 3);
725 for(i=0;i<mb_block_count;i++) {
726 if (cbp & (1 << (mb_block_count - 1 - i))) {
727 mpeg1_encode_block(s, block[i], i);
732 s->i_tex_bits+= get_bits_diff(s);
734 s->p_tex_bits+= get_bits_diff(s);
738 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
740 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
741 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
744 // RAL: Parameter added: f_or_b_code
745 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
747 int code, bit_size, l, bits, range, sign;
753 mbMotionVectorTable[0][1],
754 mbMotionVectorTable[0][0]);
756 bit_size = f_or_b_code - 1;
757 range = 1 << bit_size;
758 /* modulo encoding */
759 l= INT_BIT - 5 - bit_size;
764 code = (val >> bit_size) + 1;
765 bits = val & (range - 1);
770 code = (val >> bit_size) + 1;
771 bits = val & (range - 1);
775 assert(code > 0 && code <= 16);
778 mbMotionVectorTable[code][1],
779 mbMotionVectorTable[code][0]);
781 put_bits(&s->pb, 1, sign);
783 put_bits(&s->pb, bit_size, bits);
788 void ff_mpeg1_encode_init(MpegEncContext *s)
800 init_rl(&rl_mpeg1, 1);
801 if(s->intra_vlc_format)
802 init_rl(&rl_mpeg2, 1);
806 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
807 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
810 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len);
811 if(s->intra_vlc_format)
812 init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
814 /* build unified dc encoding tables */
815 for(i=-255; i<256; i++)
823 index = av_log2(2*adiff);
825 bits= vlc_dc_lum_bits[index] + index;
826 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
827 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
829 bits= vlc_dc_chroma_bits[index] + index;
830 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
831 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
834 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
836 for(f_code=1; f_code<=MAX_FCODE; f_code++){
837 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
840 if(mv==0) len= mbMotionVectorTable[0][1];
842 int val, bit_size, range, code;
844 bit_size = f_code - 1;
845 range = 1 << bit_size;
851 code = (val >> bit_size) + 1;
853 len= mbMotionVectorTable[code][1] + 1 + bit_size;
855 len= mbMotionVectorTable[16][1] + 2 + bit_size;
859 mv_penalty[f_code][mv+MAX_MV]= len;
864 for(f_code=MAX_FCODE; f_code>0; f_code--){
865 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
866 fcode_tab[mv+MAX_MV]= f_code;
870 s->me.mv_penalty= mv_penalty;
871 s->fcode_tab= fcode_tab;
872 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
879 if (s->intra_vlc_format) {
880 s->intra_ac_vlc_length=
881 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
883 s->intra_ac_vlc_length=
884 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
886 s->inter_ac_vlc_length=
887 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
890 static inline void encode_dc(MpegEncContext *s, int diff, int component)
892 if(((unsigned) (diff+255)) >= 511){
896 index= av_log2_16bit(-2*diff);
899 index= av_log2_16bit(2*diff);
901 if (component == 0) {
904 vlc_dc_lum_bits[index] + index,
905 (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
909 vlc_dc_chroma_bits[index] + index,
910 (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
913 if (component == 0) {
916 mpeg1_lum_dc_uni[diff+255]&0xFF,
917 mpeg1_lum_dc_uni[diff+255]>>8);
921 mpeg1_chr_dc_uni[diff+255]&0xFF,
922 mpeg1_chr_dc_uni[diff+255]>>8);
927 static void mpeg1_encode_block(MpegEncContext *s,
931 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
933 const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
935 last_index = s->block_last_index[n];
939 component = (n <= 3 ? 0 : (n&1) + 1);
940 dc = block[0]; /* overflow is impossible */
941 diff = dc - s->last_dc[component];
942 encode_dc(s, diff, component);
943 s->last_dc[component] = dc;
945 if (s->intra_vlc_format)
946 table_vlc = rl_mpeg2.table_vlc;
948 /* encode the first coefficient : needs to be done here because
949 it is handled slightly differently */
951 if (abs(level) == 1) {
952 code = ((uint32_t)level >> 31); /* the sign bit */
953 put_bits(&s->pb, 2, code | 0x02);
962 /* now quantify & encode AC coefs */
963 last_non_zero = i - 1;
965 for(;i<=last_index;i++) {
966 j = s->intra_scantable.permutated[i];
971 dprintf("level[%d]=%d\n", i, level);
973 /* encode using VLC */
975 run = i - last_non_zero - 1;
978 MASK_ABS(sign, alevel)
981 if (alevel <= mpeg1_max_level[0][run]){
982 code= mpeg1_index_run[0][run] + alevel - 1;
983 /* store the vlc & sign at once */
984 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
986 /* escape seems to be pretty rare <5% so i dont optimize it */
987 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
988 /* escape: only clip in this case */
989 put_bits(&s->pb, 6, run);
990 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
992 put_bits(&s->pb, 8, level & 0xff);
995 put_bits(&s->pb, 16, 0x8001 + level + 255);
997 put_bits(&s->pb, 16, level & 0xffff);
1001 put_bits(&s->pb, 12, level & 0xfff);
1008 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
1010 #endif //CONFIG_ENCODERS
1012 /******************************************/
1015 static VLC dc_lum_vlc;
1016 static VLC dc_chroma_vlc;
1018 static VLC mbincr_vlc;
1019 static VLC mb_ptype_vlc;
1020 static VLC mb_btype_vlc;
1021 static VLC mb_pat_vlc;
1023 static void init_vlcs(void)
1025 static int done = 0;
1030 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
1031 vlc_dc_lum_bits, 1, 1,
1032 vlc_dc_lum_code, 2, 2, 1);
1033 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
1034 vlc_dc_chroma_bits, 1, 1,
1035 vlc_dc_chroma_code, 2, 2, 1);
1036 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
1037 &mbMotionVectorTable[0][1], 2, 1,
1038 &mbMotionVectorTable[0][0], 2, 1, 1);
1039 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
1040 &mbAddrIncrTable[0][1], 2, 1,
1041 &mbAddrIncrTable[0][0], 2, 1, 1);
1042 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
1043 &mbPatTable[0][1], 2, 1,
1044 &mbPatTable[0][0], 2, 1, 1);
1046 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
1047 &table_mb_ptype[0][1], 2, 1,
1048 &table_mb_ptype[0][0], 2, 1, 1);
1049 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
1050 &table_mb_btype[0][1], 2, 1,
1051 &table_mb_btype[0][0], 2, 1, 1);
1052 init_rl(&rl_mpeg1, 1);
1053 init_rl(&rl_mpeg2, 1);
1055 init_2d_vlc_rl(&rl_mpeg1, 1);
1056 init_2d_vlc_rl(&rl_mpeg2, 1);
1060 static inline int get_dmv(MpegEncContext *s)
1062 if(get_bits1(&s->gb))
1063 return 1 - (get_bits1(&s->gb) << 1);
1068 static inline int get_qscale(MpegEncContext *s)
1070 int qscale = get_bits(&s->gb, 5);
1071 if (s->q_scale_type) {
1072 return non_linear_qscale[qscale];
1078 /* motion type (for mpeg2) */
1084 static int mpeg_decode_mb(MpegEncContext *s,
1085 DCTELEM block[12][64])
1087 int i, j, k, cbp, val, mb_type, motion_type;
1088 const int mb_block_count = 4 + (1<< s->chroma_format);
1090 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1092 assert(s->mb_skipped==0);
1094 if (s->mb_skip_run-- != 0) {
1095 if(s->pict_type == I_TYPE){
1096 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1103 s->block_last_index[i] = -1;
1104 if(s->picture_structure == PICT_FRAME)
1105 s->mv_type = MV_TYPE_16X16;
1107 s->mv_type = MV_TYPE_FIELD;
1108 if (s->pict_type == P_TYPE) {
1109 /* if P type, zero motion vector is implied */
1110 s->mv_dir = MV_DIR_FORWARD;
1111 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1112 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1113 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1114 s->field_select[0][0]= s->picture_structure - 1;
1116 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1121 mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
1123 mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in mpeg at all,
1124 if(IS_INTRA(mb_type))
1127 /* if B type, reuse previous vectors and directions */
1128 s->mv[0][0][0] = s->last_mv[0][0][0];
1129 s->mv[0][0][1] = s->last_mv[0][0][1];
1130 s->mv[1][0][0] = s->last_mv[1][0][0];
1131 s->mv[1][0][1] = s->last_mv[1][0][1];
1133 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1134 mb_type | MB_TYPE_SKIP;
1135 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1137 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1144 switch(s->pict_type) {
1147 if (get_bits1(&s->gb) == 0) {
1148 if (get_bits1(&s->gb) == 0){
1149 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1152 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1154 mb_type = MB_TYPE_INTRA;
1158 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1160 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1163 mb_type = ptype2mb_type[ mb_type ];
1166 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1168 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1171 mb_type = btype2mb_type[ mb_type ];
1174 dprintf("mb_type=%x\n", mb_type);
1175 // motion_type = 0; /* avoid warning */
1176 if (IS_INTRA(mb_type)) {
1177 s->dsp.clear_blocks(s->block[0]);
1179 if(!s->chroma_y_shift){
1180 s->dsp.clear_blocks(s->block[6]);
1183 /* compute dct type */
1184 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1185 !s->frame_pred_frame_dct) {
1186 s->interlaced_dct = get_bits1(&s->gb);
1189 if (IS_QUANT(mb_type))
1190 s->qscale = get_qscale(s);
1192 if (s->concealment_motion_vectors) {
1193 /* just parse them */
1194 if (s->picture_structure != PICT_FRAME)
1195 skip_bits1(&s->gb); /* field select */
1197 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1198 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1199 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1200 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1202 skip_bits1(&s->gb); /* marker */
1204 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1207 //one 1 we memcpy blocks in xvmcvideo
1208 if(s->avctx->xvmc_acceleration > 1){
1209 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1216 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1217 if(s->flags2 & CODEC_FLAG2_FAST){
1219 mpeg2_fast_decode_block_intra(s, s->pblocks[i], i);
1222 for(i=0;i<mb_block_count;i++) {
1223 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1229 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1234 if (mb_type & MB_TYPE_ZERO_MV){
1235 assert(mb_type & MB_TYPE_CBP);
1237 /* compute dct type */
1238 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1239 !s->frame_pred_frame_dct) {
1240 s->interlaced_dct = get_bits1(&s->gb);
1243 if (IS_QUANT(mb_type))
1244 s->qscale = get_qscale(s);
1246 s->mv_dir = MV_DIR_FORWARD;
1247 if(s->picture_structure == PICT_FRAME)
1248 s->mv_type = MV_TYPE_16X16;
1250 s->mv_type = MV_TYPE_FIELD;
1251 mb_type |= MB_TYPE_INTERLACED;
1252 s->field_select[0][0]= s->picture_structure - 1;
1254 s->last_mv[0][0][0] = 0;
1255 s->last_mv[0][0][1] = 0;
1256 s->last_mv[0][1][0] = 0;
1257 s->last_mv[0][1][1] = 0;
1261 assert(mb_type & MB_TYPE_L0L1);
1262 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1263 /* get additionnal motion vector type */
1264 if (s->frame_pred_frame_dct)
1265 motion_type = MT_FRAME;
1267 motion_type = get_bits(&s->gb, 2);
1270 /* compute dct type */
1271 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1272 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1273 s->interlaced_dct = get_bits1(&s->gb);
1276 if (IS_QUANT(mb_type))
1277 s->qscale = get_qscale(s);
1279 /* motion vectors */
1282 if (USES_LIST(mb_type, i)) {
1283 s->mv_dir |= (MV_DIR_FORWARD >> i);
1284 dprintf("motion_type=%d\n", motion_type);
1285 switch(motion_type) {
1286 case MT_FRAME: /* or MT_16X8 */
1287 if (s->picture_structure == PICT_FRAME) {
1289 mb_type |= MB_TYPE_16x16;
1290 s->mv_type = MV_TYPE_16X16;
1291 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1292 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1293 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1294 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1295 /* full_pel: only for mpeg1 */
1296 if (s->full_pel[i]){
1297 s->mv[i][0][0] <<= 1;
1298 s->mv[i][0][1] <<= 1;
1302 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1303 s->mv_type = MV_TYPE_16X8;
1305 s->field_select[i][j] = get_bits1(&s->gb);
1307 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1308 s->last_mv[i][j][k]);
1309 s->last_mv[i][j][k] = val;
1310 s->mv[i][j][k] = val;
1316 s->mv_type = MV_TYPE_FIELD;
1317 if (s->picture_structure == PICT_FRAME) {
1318 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1320 s->field_select[i][j] = get_bits1(&s->gb);
1321 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1322 s->last_mv[i][j][0]);
1323 s->last_mv[i][j][0] = val;
1324 s->mv[i][j][0] = val;
1325 dprintf("fmx=%d\n", val);
1326 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1327 s->last_mv[i][j][1] >> 1);
1328 s->last_mv[i][j][1] = val << 1;
1329 s->mv[i][j][1] = val;
1330 dprintf("fmy=%d\n", val);
1333 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1334 s->field_select[i][0] = get_bits1(&s->gb);
1336 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1337 s->last_mv[i][0][k]);
1338 s->last_mv[i][0][k] = val;
1339 s->last_mv[i][1][k] = val;
1340 s->mv[i][0][k] = val;
1346 int dmx, dmy, mx, my, m;
1348 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1349 s->last_mv[i][0][0]);
1350 s->last_mv[i][0][0] = mx;
1351 s->last_mv[i][1][0] = mx;
1353 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1354 s->last_mv[i][0][1] >> 1);
1356 s->mv_type = MV_TYPE_DMV;
1359 s->last_mv[i][0][1] = my<<1;
1360 s->last_mv[i][1][1] = my<<1;
1362 s->mv[i][0][0] = mx;
1363 s->mv[i][0][1] = my;
1364 s->mv[i][1][0] = mx;//not used
1365 s->mv[i][1][1] = my;//not used
1367 if (s->picture_structure == PICT_FRAME) {
1368 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1370 //m = 1 + 2 * s->top_field_first;
1371 m = s->top_field_first ? 1 : 3;
1373 /* top -> top pred */
1374 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1375 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1377 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1378 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1380 mb_type |= MB_TYPE_16x16;
1382 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1383 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1384 if(s->picture_structure == PICT_TOP_FIELD)
1392 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1400 if (HAS_CBP(mb_type)) {
1401 s->dsp.clear_blocks(s->block[0]);
1403 if(!s->chroma_y_shift){
1404 s->dsp.clear_blocks(s->block[6]);
1407 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1408 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
1409 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1412 if(mb_block_count > 6){
1413 cbp<<= mb_block_count-6;
1414 cbp |= get_bits(&s->gb, mb_block_count-6);
1418 //on 1 we memcpy blocks in xvmcvideo
1419 if(s->avctx->xvmc_acceleration > 1){
1420 XVMC_pack_pblocks(s,cbp);
1427 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1428 if(s->flags2 & CODEC_FLAG2_FAST){
1431 mpeg2_fast_decode_block_non_intra(s, s->pblocks[i], i);
1433 s->block_last_index[i] = -1;
1438 cbp<<= 12-mb_block_count;
1440 for(i=0;i<mb_block_count;i++) {
1441 if ( cbp & (1<<11) ) {
1442 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1445 s->block_last_index[i] = -1;
1451 if(s->flags2 & CODEC_FLAG2_FAST){
1454 mpeg1_fast_decode_block_inter(s, s->pblocks[i], i);
1456 s->block_last_index[i] = -1;
1463 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1466 s->block_last_index[i] = -1;
1474 s->block_last_index[i] = -1;
1478 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1483 /* as h263, but only 17 codes */
1484 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1486 int code, sign, val, l, shift;
1488 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1496 sign = get_bits1(&s->gb);
1500 val = (val - 1) << shift;
1501 val |= get_bits(&s->gb, shift);
1508 /* modulo decoding */
1509 l= INT_BIT - 5 - shift;
1514 static inline int decode_dc(GetBitContext *gb, int component)
1518 if (component == 0) {
1519 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1521 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1524 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1530 diff = get_xbits(gb, code);
1535 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1539 int level, dc, diff, i, j, run;
1541 RLTable *rl = &rl_mpeg1;
1542 uint8_t * const scantable= s->intra_scantable.permutated;
1543 const uint16_t *quant_matrix= s->intra_matrix;
1544 const int qscale= s->qscale;
1547 component = (n <= 3 ? 0 : n - 4 + 1);
1548 diff = decode_dc(&s->gb, component);
1551 dc = s->last_dc[component];
1553 s->last_dc[component] = dc;
1555 dprintf("dc=%d diff=%d\n", dc, diff);
1558 OPEN_READER(re, &s->gb);
1559 /* now quantify & encode AC coefs */
1561 UPDATE_CACHE(re, &s->gb);
1562 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1566 } else if(level != 0) {
1569 level= (level*qscale*quant_matrix[j])>>4;
1571 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1572 LAST_SKIP_BITS(re, &s->gb, 1);
1575 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1576 UPDATE_CACHE(re, &s->gb);
1577 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1578 if (level == -128) {
1579 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1580 } else if (level == 0) {
1581 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1587 level= (level*qscale*quant_matrix[j])>>4;
1591 level= (level*qscale*quant_matrix[j])>>4;
1596 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1602 CLOSE_READER(re, &s->gb);
1604 s->block_last_index[n] = i;
1608 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1612 int level, i, j, run;
1613 RLTable *rl = &rl_mpeg1;
1614 uint8_t * const scantable= s->intra_scantable.permutated;
1615 const uint16_t *quant_matrix= s->inter_matrix;
1616 const int qscale= s->qscale;
1619 OPEN_READER(re, &s->gb);
1621 /* special case for the first coef. no need to add a second vlc table */
1622 UPDATE_CACHE(re, &s->gb);
1623 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1624 level= (3*qscale*quant_matrix[0])>>5;
1626 if(GET_CACHE(re, &s->gb)&0x40000000)
1630 SKIP_BITS(re, &s->gb, 2);
1631 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1635 /* now quantify & encode AC coefs */
1637 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1642 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1644 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1645 SKIP_BITS(re, &s->gb, 1);
1648 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1649 UPDATE_CACHE(re, &s->gb);
1650 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1651 if (level == -128) {
1652 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1653 } else if (level == 0) {
1654 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1660 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1664 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1669 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1674 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1676 UPDATE_CACHE(re, &s->gb);
1679 LAST_SKIP_BITS(re, &s->gb, 2);
1680 CLOSE_READER(re, &s->gb);
1682 s->block_last_index[n] = i;
1686 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
1688 int level, i, j, run;
1689 RLTable *rl = &rl_mpeg1;
1690 uint8_t * const scantable= s->intra_scantable.permutated;
1691 const int qscale= s->qscale;
1694 OPEN_READER(re, &s->gb);
1696 /* special case for the first coef. no need to add a second vlc table */
1697 UPDATE_CACHE(re, &s->gb);
1698 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1699 level= (3*qscale)>>1;
1701 if(GET_CACHE(re, &s->gb)&0x40000000)
1705 SKIP_BITS(re, &s->gb, 2);
1706 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1710 /* now quantify & encode AC coefs */
1712 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1717 level= ((level*2+1)*qscale)>>1;
1719 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1720 SKIP_BITS(re, &s->gb, 1);
1723 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1724 UPDATE_CACHE(re, &s->gb);
1725 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1726 if (level == -128) {
1727 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1728 } else if (level == 0) {
1729 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1735 level= ((level*2+1)*qscale)>>1;
1739 level= ((level*2+1)*qscale)>>1;
1745 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1747 UPDATE_CACHE(re, &s->gb);
1750 LAST_SKIP_BITS(re, &s->gb, 2);
1751 CLOSE_READER(re, &s->gb);
1753 s->block_last_index[n] = i;
1758 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1762 int level, i, j, run;
1763 RLTable *rl = &rl_mpeg1;
1764 uint8_t * const scantable= s->intra_scantable.permutated;
1765 const uint16_t *quant_matrix;
1766 const int qscale= s->qscale;
1772 OPEN_READER(re, &s->gb);
1775 quant_matrix = s->inter_matrix;
1777 quant_matrix = s->chroma_inter_matrix;
1779 /* special case for the first coef. no need to add a second vlc table */
1780 UPDATE_CACHE(re, &s->gb);
1781 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1782 level= (3*qscale*quant_matrix[0])>>5;
1783 if(GET_CACHE(re, &s->gb)&0x40000000)
1788 SKIP_BITS(re, &s->gb, 2);
1789 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1793 /* now quantify & encode AC coefs */
1795 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1800 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1801 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1802 SKIP_BITS(re, &s->gb, 1);
1805 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1806 UPDATE_CACHE(re, &s->gb);
1807 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1812 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1815 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1819 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1825 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1827 UPDATE_CACHE(re, &s->gb);
1830 LAST_SKIP_BITS(re, &s->gb, 2);
1831 CLOSE_READER(re, &s->gb);
1833 block[63] ^= (mismatch & 1);
1835 s->block_last_index[n] = i;
1839 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
1843 int level, i, j, run;
1844 RLTable *rl = &rl_mpeg1;
1845 uint8_t * const scantable= s->intra_scantable.permutated;
1846 const int qscale= s->qscale;
1847 OPEN_READER(re, &s->gb);
1850 /* special case for the first coef. no need to add a second vlc table */
1851 UPDATE_CACHE(re, &s->gb);
1852 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1853 level= (3*qscale)>>1;
1854 if(GET_CACHE(re, &s->gb)&0x40000000)
1858 SKIP_BITS(re, &s->gb, 2);
1859 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1863 /* now quantify & encode AC coefs */
1865 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1870 level= ((level*2+1)*qscale)>>1;
1871 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1872 SKIP_BITS(re, &s->gb, 1);
1875 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1876 UPDATE_CACHE(re, &s->gb);
1877 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1882 level= ((-level*2+1)*qscale)>>1;
1885 level= ((level*2+1)*qscale)>>1;
1890 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1892 UPDATE_CACHE(re, &s->gb);
1895 LAST_SKIP_BITS(re, &s->gb, 2);
1896 CLOSE_READER(re, &s->gb);
1897 s->block_last_index[n] = i;
1902 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1906 int level, dc, diff, i, j, run;
1909 uint8_t * const scantable= s->intra_scantable.permutated;
1910 const uint16_t *quant_matrix;
1911 const int qscale= s->qscale;
1916 quant_matrix = s->intra_matrix;
1919 quant_matrix = s->chroma_intra_matrix;
1920 component = (n&1) + 1;
1922 diff = decode_dc(&s->gb, component);
1925 dc = s->last_dc[component];
1927 s->last_dc[component] = dc;
1928 block[0] = dc << (3 - s->intra_dc_precision);
1929 dprintf("dc=%d\n", block[0]);
1930 mismatch = block[0] ^ 1;
1932 if (s->intra_vlc_format)
1938 OPEN_READER(re, &s->gb);
1939 /* now quantify & encode AC coefs */
1941 UPDATE_CACHE(re, &s->gb);
1942 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1946 } else if(level != 0) {
1949 level= (level*qscale*quant_matrix[j])>>4;
1950 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1951 LAST_SKIP_BITS(re, &s->gb, 1);
1954 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1955 UPDATE_CACHE(re, &s->gb);
1956 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1960 level= (-level*qscale*quant_matrix[j])>>4;
1963 level= (level*qscale*quant_matrix[j])>>4;
1967 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1974 CLOSE_READER(re, &s->gb);
1976 block[63]^= mismatch&1;
1978 s->block_last_index[n] = i;
1982 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
1986 int level, dc, diff, j, run;
1989 uint8_t * scantable= s->intra_scantable.permutated;
1990 const uint16_t *quant_matrix;
1991 const int qscale= s->qscale;
1995 quant_matrix = s->intra_matrix;
1998 quant_matrix = s->chroma_intra_matrix;
1999 component = (n&1) + 1;
2001 diff = decode_dc(&s->gb, component);
2004 dc = s->last_dc[component];
2006 s->last_dc[component] = dc;
2007 block[0] = dc << (3 - s->intra_dc_precision);
2008 if (s->intra_vlc_format)
2014 OPEN_READER(re, &s->gb);
2015 /* now quantify & encode AC coefs */
2017 UPDATE_CACHE(re, &s->gb);
2018 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
2022 } else if(level != 0) {
2025 level= (level*qscale*quant_matrix[j])>>4;
2026 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
2027 LAST_SKIP_BITS(re, &s->gb, 1);
2030 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
2031 UPDATE_CACHE(re, &s->gb);
2032 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
2036 level= (-level*qscale*quant_matrix[j])>>4;
2039 level= (level*qscale*quant_matrix[j])>>4;
2045 CLOSE_READER(re, &s->gb);
2048 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
2052 typedef struct Mpeg1Context {
2053 MpegEncContext mpeg_enc_ctx;
2054 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
2055 int repeat_field; /* true if we must repeat the field */
2056 AVPanScan pan_scan; /** some temporary storage for the panscan */
2058 int swap_uv;//indicate VCR2
2059 int save_aspect_info;
2060 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
2064 static int mpeg_decode_init(AVCodecContext *avctx)
2066 Mpeg1Context *s = avctx->priv_data;
2067 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2070 //we need some parmutation to store
2071 //matrixes, until MPV_common_init()
2072 //set the real permutatuon
2074 s2->dsp.idct_permutation[i]=i;
2076 MPV_decode_defaults(s2);
2078 s->mpeg_enc_ctx.avctx= avctx;
2079 s->mpeg_enc_ctx.flags= avctx->flags;
2080 s->mpeg_enc_ctx.flags2= avctx->flags2;
2081 common_init(&s->mpeg_enc_ctx);
2084 s->mpeg_enc_ctx_allocated = 0;
2085 s->mpeg_enc_ctx.picture_number = 0;
2086 s->repeat_field = 0;
2087 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
2091 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
2092 const uint8_t *new_perm){
2093 uint16_t temp_matrix[64];
2096 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
2099 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
2103 //Call this function when we know all parameters
2104 //it may be called in different places for mpeg1 and mpeg2
2105 static int mpeg_decode_postinit(AVCodecContext *avctx){
2106 Mpeg1Context *s1 = avctx->priv_data;
2107 MpegEncContext *s = &s1->mpeg_enc_ctx;
2108 uint8_t old_permutation[64];
2111 (s1->mpeg_enc_ctx_allocated == 0)||
2112 avctx->coded_width != s->width ||
2113 avctx->coded_height != s->height||
2114 s1->save_aspect_info != s->aspect_ratio_info||
2118 if (s1->mpeg_enc_ctx_allocated) {
2119 ParseContext pc= s->parse_context;
2120 s->parse_context.buffer=0;
2122 s->parse_context= pc;
2125 if( (s->width == 0 )||(s->height == 0))
2128 avcodec_set_dimensions(avctx, s->width, s->height);
2129 avctx->bit_rate = s->bit_rate;
2130 s1->save_aspect_info = s->aspect_ratio_info;
2132 //low_delay may be forced, in this case we will have B frames
2133 //that behave like P frames
2134 avctx->has_b_frames = !(s->low_delay);
2136 if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
2138 avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
2139 avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
2141 avctx->sample_aspect_ratio= av_d2q(
2142 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
2147 &s->avctx->time_base.den,
2148 &s->avctx->time_base.num,
2149 ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
2150 ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
2153 if(s->aspect_ratio_info > 1){
2154 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
2155 s->avctx->sample_aspect_ratio=
2157 mpeg2_aspect[s->aspect_ratio_info],
2158 (AVRational){s->width, s->height}
2161 s->avctx->sample_aspect_ratio=
2163 mpeg2_aspect[s->aspect_ratio_info],
2164 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
2168 s->avctx->sample_aspect_ratio=
2169 mpeg2_aspect[s->aspect_ratio_info];
2173 if(avctx->xvmc_acceleration){
2174 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2176 if(s->chroma_format < 2){
2177 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2179 if(s->chroma_format == 2){
2180 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
2182 if(s->chroma_format > 2){
2183 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
2186 //until then pix_fmt may be changed right after codec init
2187 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2188 if( avctx->idct_algo == FF_IDCT_AUTO )
2189 avctx->idct_algo = FF_IDCT_SIMPLE;
2191 //quantization matrixes may need reordering
2192 //if dct permutation is changed
2193 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
2195 if (MPV_common_init(s) < 0)
2198 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
2199 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
2200 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
2201 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
2203 s1->mpeg_enc_ctx_allocated = 1;
2208 static int mpeg1_decode_picture(AVCodecContext *avctx,
2209 const uint8_t *buf, int buf_size)
2211 Mpeg1Context *s1 = avctx->priv_data;
2212 MpegEncContext *s = &s1->mpeg_enc_ctx;
2213 int ref, f_code, vbv_delay;
2215 if(mpeg_decode_postinit(s->avctx) < 0)
2218 init_get_bits(&s->gb, buf, buf_size*8);
2220 ref = get_bits(&s->gb, 10); /* temporal ref */
2221 s->pict_type = get_bits(&s->gb, 3);
2222 if(s->pict_type == 0 || s->pict_type > 3)
2225 vbv_delay= get_bits(&s->gb, 16);
2226 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
2227 s->full_pel[0] = get_bits1(&s->gb);
2228 f_code = get_bits(&s->gb, 3);
2229 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2231 s->mpeg_f_code[0][0] = f_code;
2232 s->mpeg_f_code[0][1] = f_code;
2234 if (s->pict_type == B_TYPE) {
2235 s->full_pel[1] = get_bits1(&s->gb);
2236 f_code = get_bits(&s->gb, 3);
2237 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2239 s->mpeg_f_code[1][0] = f_code;
2240 s->mpeg_f_code[1][1] = f_code;
2242 s->current_picture.pict_type= s->pict_type;
2243 s->current_picture.key_frame= s->pict_type == I_TYPE;
2245 if(avctx->debug & FF_DEBUG_PICT_INFO)
2246 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
2254 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
2256 MpegEncContext *s= &s1->mpeg_enc_ctx;
2257 int horiz_size_ext, vert_size_ext;
2260 skip_bits(&s->gb, 1); /* profil and level esc*/
2261 s->avctx->profile= get_bits(&s->gb, 3);
2262 s->avctx->level= get_bits(&s->gb, 4);
2263 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
2264 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
2265 horiz_size_ext = get_bits(&s->gb, 2);
2266 vert_size_ext = get_bits(&s->gb, 2);
2267 s->width |= (horiz_size_ext << 12);
2268 s->height |= (vert_size_ext << 12);
2269 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
2270 s->bit_rate += (bit_rate_ext << 18) * 400;
2271 skip_bits1(&s->gb); /* marker */
2272 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
2274 s->low_delay = get_bits1(&s->gb);
2275 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2277 s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
2278 s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
2280 dprintf("sequence extension\n");
2281 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2282 s->avctx->sub_id = 2; /* indicates mpeg2 found */
2284 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2285 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
2286 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
2290 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
2292 MpegEncContext *s= &s1->mpeg_enc_ctx;
2293 int color_description, w, h;
2295 skip_bits(&s->gb, 3); /* video format */
2296 color_description= get_bits1(&s->gb);
2297 if(color_description){
2298 skip_bits(&s->gb, 8); /* color primaries */
2299 skip_bits(&s->gb, 8); /* transfer_characteristics */
2300 skip_bits(&s->gb, 8); /* matrix_coefficients */
2302 w= get_bits(&s->gb, 14);
2303 skip_bits(&s->gb, 1); //marker
2304 h= get_bits(&s->gb, 14);
2305 skip_bits(&s->gb, 1); //marker
2307 s1->pan_scan.width= 16*w;
2308 s1->pan_scan.height=16*h;
2310 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2311 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
2314 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
2316 MpegEncContext *s= &s1->mpeg_enc_ctx;
2320 if(s->progressive_sequence){
2321 if(s->repeat_first_field){
2323 if(s->top_field_first)
2327 if(s->picture_structure == PICT_FRAME){
2329 if(s->repeat_first_field)
2333 for(i=0; i<nofco; i++){
2334 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
2335 skip_bits(&s->gb, 1); //marker
2336 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
2337 skip_bits(&s->gb, 1); //marker
2340 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2341 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
2342 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
2343 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
2344 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
2348 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
2352 dprintf("matrix extension\n");
2354 if (get_bits1(&s->gb)) {
2356 v = get_bits(&s->gb, 8);
2357 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2358 s->intra_matrix[j] = v;
2359 s->chroma_intra_matrix[j] = v;
2362 if (get_bits1(&s->gb)) {
2364 v = get_bits(&s->gb, 8);
2365 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2366 s->inter_matrix[j] = v;
2367 s->chroma_inter_matrix[j] = v;
2370 if (get_bits1(&s->gb)) {
2372 v = get_bits(&s->gb, 8);
2373 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2374 s->chroma_intra_matrix[j] = v;
2377 if (get_bits1(&s->gb)) {
2379 v = get_bits(&s->gb, 8);
2380 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2381 s->chroma_inter_matrix[j] = v;
2386 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
2388 s->full_pel[0] = s->full_pel[1] = 0;
2389 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
2390 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
2391 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
2392 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
2393 s->intra_dc_precision = get_bits(&s->gb, 2);
2394 s->picture_structure = get_bits(&s->gb, 2);
2395 s->top_field_first = get_bits1(&s->gb);
2396 s->frame_pred_frame_dct = get_bits1(&s->gb);
2397 s->concealment_motion_vectors = get_bits1(&s->gb);
2398 s->q_scale_type = get_bits1(&s->gb);
2399 s->intra_vlc_format = get_bits1(&s->gb);
2400 s->alternate_scan = get_bits1(&s->gb);
2401 s->repeat_first_field = get_bits1(&s->gb);
2402 s->chroma_420_type = get_bits1(&s->gb);
2403 s->progressive_frame = get_bits1(&s->gb);
2405 if(s->picture_structure == PICT_FRAME){
2407 s->v_edge_pos= 16*s->mb_height;
2409 s->first_field ^= 1;
2410 s->v_edge_pos= 8*s->mb_height;
2411 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
2414 if(s->alternate_scan){
2415 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2416 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
2418 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2419 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
2422 /* composite display not parsed */
2423 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
2424 dprintf("picture_structure=%d\n", s->picture_structure);
2425 dprintf("top field first=%d\n", s->top_field_first);
2426 dprintf("repeat first field=%d\n", s->repeat_first_field);
2427 dprintf("conceal=%d\n", s->concealment_motion_vectors);
2428 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
2429 dprintf("alternate_scan=%d\n", s->alternate_scan);
2430 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2431 dprintf("progressive_frame=%d\n", s->progressive_frame);
2434 static void mpeg_decode_extension(AVCodecContext *avctx,
2435 const uint8_t *buf, int buf_size)
2437 Mpeg1Context *s1 = avctx->priv_data;
2438 MpegEncContext *s = &s1->mpeg_enc_ctx;
2441 init_get_bits(&s->gb, buf, buf_size*8);
2443 ext_type = get_bits(&s->gb, 4);
2446 mpeg_decode_sequence_extension(s1);
2449 mpeg_decode_sequence_display_extension(s1);
2452 mpeg_decode_quant_matrix_extension(s);
2455 mpeg_decode_picture_display_extension(s1);
2458 mpeg_decode_picture_coding_extension(s);
2463 static void exchange_uv(MpegEncContext *s){
2464 short * tmp = s->pblocks[4];
2465 s->pblocks[4] = s->pblocks[5];
2466 s->pblocks[5] = tmp;
2469 static int mpeg_field_start(MpegEncContext *s){
2470 AVCodecContext *avctx= s->avctx;
2471 Mpeg1Context *s1 = (Mpeg1Context*)s;
2473 /* start frame decoding */
2474 if(s->first_field || s->picture_structure==PICT_FRAME){
2475 if(MPV_frame_start(s, avctx) < 0)
2478 ff_er_frame_start(s);
2480 /* first check if we must repeat the frame */
2481 s->current_picture_ptr->repeat_pict = 0;
2482 if (s->repeat_first_field) {
2483 if (s->progressive_sequence) {
2484 if (s->top_field_first)
2485 s->current_picture_ptr->repeat_pict = 4;
2487 s->current_picture_ptr->repeat_pict = 2;
2488 } else if (s->progressive_frame) {
2489 s->current_picture_ptr->repeat_pict = 1;
2493 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2494 }else{ //second field
2497 if(!s->current_picture_ptr){
2498 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2503 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2504 if(s->picture_structure == PICT_BOTTOM_FIELD){
2505 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2510 // MPV_frame_start will call this function too,
2511 // but we need to call it on every field
2512 if(s->avctx->xvmc_acceleration)
2513 XVMC_field_start(s,avctx);
2519 #define DECODE_SLICE_ERROR -1
2520 #define DECODE_SLICE_OK 0
2523 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2524 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2525 * DECODE_SLICE_OK if this slice is ok<br>
2527 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
2528 const uint8_t **buf, int buf_size)
2530 MpegEncContext *s = &s1->mpeg_enc_ctx;
2531 AVCodecContext *avctx= s->avctx;
2533 const int field_pic= s->picture_structure != PICT_FRAME;
2534 const int lowres= s->avctx->lowres;
2539 if (mb_y<<field_pic >= s->mb_height){
2540 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
2544 init_get_bits(&s->gb, *buf, buf_size*8);
2546 ff_mpeg1_clean_buffers(s);
2547 s->interlaced_dct = 0;
2549 s->qscale = get_qscale(s);
2552 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2556 /* extra slice info */
2557 while (get_bits1(&s->gb) != 0) {
2558 skip_bits(&s->gb, 8);
2564 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2566 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2573 /* otherwise, stuffing, nothing to do */
2580 s->resync_mb_x= s->mb_x;
2581 s->resync_mb_y= s->mb_y= mb_y;
2583 ff_init_block_index(s);
2585 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2586 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2587 av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
2588 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],
2589 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2590 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2591 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2592 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2598 //one 1 we memcpy blocks in xvmcvideo
2599 if(s->avctx->xvmc_acceleration > 1)
2600 XVMC_init_block(s);//set s->block
2603 ret = mpeg_decode_mb(s, s->block);
2604 s->chroma_qscale= s->qscale;
2606 dprintf("ret=%d\n", ret);
2610 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2611 const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
2612 int xy = s->mb_x*2 + s->mb_y*2*wrap;
2613 int motion_x, motion_y, dir, i;
2614 if(field_pic && !s->first_field)
2618 for(dir=0; dir<2; dir++){
2619 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2620 motion_x = motion_y = 0;
2621 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
2622 motion_x = s->mv[dir][0][0];
2623 motion_y = s->mv[dir][0][1];
2624 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2625 motion_x = s->mv[dir][i][0];
2626 motion_y = s->mv[dir][i][1];
2629 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2630 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2631 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2632 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
2633 s->current_picture.ref_index [dir][xy ]=
2634 s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
2635 assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
2641 s->dest[0] += 16 >> lowres;
2642 s->dest[1] += 16 >> (s->chroma_x_shift + lowres);
2643 s->dest[2] += 16 >> (s->chroma_x_shift + lowres);
2645 MPV_decode_mb(s, s->block);
2647 if (++s->mb_x >= s->mb_width) {
2648 const int mb_size= 16>>s->avctx->lowres;
2650 ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size);
2655 if(s->mb_y<<field_pic >= s->mb_height){
2656 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2657 int is_d10= s->chroma_format==2 && s->pict_type==I_TYPE && avctx->profile==0 && avctx->level==5
2658 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
2659 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
2661 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
2662 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2663 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
2669 ff_init_block_index(s);
2672 /* skip mb handling */
2673 if (s->mb_skip_run == -1) {
2674 /* read again increment */
2677 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2679 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2684 s->mb_skip_run += 33;
2685 }else if(code == 35){
2686 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2687 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2690 goto eos; /* end of slice */
2692 /* otherwise, stuffing, nothing to do */
2694 s->mb_skip_run += code;
2700 eos: // end of slice
2701 *buf += get_bits_count(&s->gb)/8 - 1;
2702 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2706 static int slice_decode_thread(AVCodecContext *c, void *arg){
2707 MpegEncContext *s= arg;
2708 const uint8_t *buf= s->gb.buffer;
2709 int mb_y= s->start_mb_y;
2711 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2714 uint32_t start_code;
2717 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2719 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2720 //ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count);
2722 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2723 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
2725 ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
2728 if(s->mb_y == s->end_mb_y)
2732 buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
2733 mb_y= start_code - SLICE_MIN_START_CODE;
2734 if(mb_y < 0 || mb_y >= s->end_mb_y)
2738 return 0; //not reached
2742 * handles slice ends.
2743 * @return 1 if it seems to be the last slice of
2745 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2747 Mpeg1Context *s1 = avctx->priv_data;
2748 MpegEncContext *s = &s1->mpeg_enc_ctx;
2750 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2754 if(s->avctx->xvmc_acceleration)
2757 /* end of slice reached */
2758 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2761 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2767 if (s->pict_type == B_TYPE || s->low_delay) {
2768 *pict= *(AVFrame*)s->current_picture_ptr;
2769 ff_print_debug_info(s, pict);
2771 s->picture_number++;
2772 /* latency of 1 frame for I and P frames */
2773 /* XXX: use another variable than picture_number */
2774 if (s->last_picture_ptr != NULL) {
2775 *pict= *(AVFrame*)s->last_picture_ptr;
2776 ff_print_debug_info(s, pict);
2786 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2787 const uint8_t *buf, int buf_size)
2789 Mpeg1Context *s1 = avctx->priv_data;
2790 MpegEncContext *s = &s1->mpeg_enc_ctx;
2794 init_get_bits(&s->gb, buf, buf_size*8);
2796 width = get_bits(&s->gb, 12);
2797 height = get_bits(&s->gb, 12);
2798 if (width <= 0 || height <= 0 ||
2799 (width % 2) != 0 || (height % 2) != 0)
2801 s->aspect_ratio_info= get_bits(&s->gb, 4);
2802 if (s->aspect_ratio_info == 0)
2804 s->frame_rate_index = get_bits(&s->gb, 4);
2805 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2807 s->bit_rate = get_bits(&s->gb, 18) * 400;
2808 if (get_bits1(&s->gb) == 0) /* marker */
2813 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2814 skip_bits(&s->gb, 1);
2817 if (get_bits1(&s->gb)) {
2819 v = get_bits(&s->gb, 8);
2821 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2824 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2825 s->intra_matrix[j] = v;
2826 s->chroma_intra_matrix[j] = v;
2829 dprintf("intra matrix present\n");
2831 dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
2836 j = s->dsp.idct_permutation[i];
2837 v = ff_mpeg1_default_intra_matrix[i];
2838 s->intra_matrix[j] = v;
2839 s->chroma_intra_matrix[j] = v;
2842 if (get_bits1(&s->gb)) {
2844 v = get_bits(&s->gb, 8);
2846 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2849 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2850 s->inter_matrix[j] = v;
2851 s->chroma_inter_matrix[j] = v;
2854 dprintf("non intra matrix present\n");
2856 dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
2861 int j= s->dsp.idct_permutation[i];
2862 v = ff_mpeg1_default_non_intra_matrix[i];
2863 s->inter_matrix[j] = v;
2864 s->chroma_inter_matrix[j] = v;
2868 if(show_bits(&s->gb, 23) != 0){
2869 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2873 /* we set mpeg2 parameters so that it emulates mpeg1 */
2874 s->progressive_sequence = 1;
2875 s->progressive_frame = 1;
2876 s->picture_structure = PICT_FRAME;
2877 s->frame_pred_frame_dct = 1;
2878 s->chroma_format = 1;
2879 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2880 avctx->sub_id = 1; /* indicates mpeg1 */
2881 s->out_format = FMT_MPEG1;
2882 s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
2883 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2885 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2886 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2887 s->avctx->rc_buffer_size, s->bit_rate);
2892 static int vcr2_init_sequence(AVCodecContext *avctx)
2894 Mpeg1Context *s1 = avctx->priv_data;
2895 MpegEncContext *s = &s1->mpeg_enc_ctx;
2898 /* start new mpeg1 context decoding */
2899 s->out_format = FMT_MPEG1;
2900 if (s1->mpeg_enc_ctx_allocated) {
2903 s->width = avctx->coded_width;
2904 s->height = avctx->coded_height;
2905 avctx->has_b_frames= 0; //true?
2908 if(avctx->xvmc_acceleration){
2909 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2911 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2914 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2915 if( avctx->idct_algo == FF_IDCT_AUTO )
2916 avctx->idct_algo = FF_IDCT_SIMPLE;
2918 if (MPV_common_init(s) < 0)
2920 exchange_uv(s);//common init reset pblocks, so we swap them here
2921 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2922 s1->mpeg_enc_ctx_allocated = 1;
2925 int j= s->dsp.idct_permutation[i];
2926 v = ff_mpeg1_default_intra_matrix[i];
2927 s->intra_matrix[j] = v;
2928 s->chroma_intra_matrix[j] = v;
2930 v = ff_mpeg1_default_non_intra_matrix[i];
2931 s->inter_matrix[j] = v;
2932 s->chroma_inter_matrix[j] = v;
2935 s->progressive_sequence = 1;
2936 s->progressive_frame = 1;
2937 s->picture_structure = PICT_FRAME;
2938 s->frame_pred_frame_dct = 1;
2939 s->chroma_format = 1;
2940 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2941 avctx->sub_id = 2; /* indicates mpeg2 */
2946 static void mpeg_decode_user_data(AVCodecContext *avctx,
2947 const uint8_t *buf, int buf_size)
2954 /* we parse the DTG active format information */
2956 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2970 avctx->dtg_active_format = p[0] & 0x0f;
2975 static void mpeg_decode_gop(AVCodecContext *avctx,
2976 const uint8_t *buf, int buf_size){
2977 Mpeg1Context *s1 = avctx->priv_data;
2978 MpegEncContext *s = &s1->mpeg_enc_ctx;
2980 int drop_frame_flag;
2981 int time_code_hours, time_code_minutes;
2982 int time_code_seconds, time_code_pictures;
2985 init_get_bits(&s->gb, buf, buf_size*8);
2987 drop_frame_flag = get_bits1(&s->gb);
2989 time_code_hours=get_bits(&s->gb,5);
2990 time_code_minutes = get_bits(&s->gb,6);
2991 skip_bits1(&s->gb);//marker bit
2992 time_code_seconds = get_bits(&s->gb,6);
2993 time_code_pictures = get_bits(&s->gb,6);
2995 /*broken_link indicate that after editing the
2996 reference frames of the first B-Frames after GOP I-Frame
2997 are missing (open gop)*/
2998 broken_link = get_bits1(&s->gb);
3000 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
3001 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
3002 time_code_hours, time_code_minutes, time_code_seconds,
3003 time_code_pictures, broken_link);
3006 * finds the end of the current frame in the bitstream.
3007 * @return the position of the first byte of the next frame, or -1
3009 static int mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
3012 uint32_t state= pc->state;
3015 if(!pc->frame_start_found){
3016 for(i=0; i<buf_size; i++){
3017 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3018 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
3020 pc->frame_start_found=1;
3026 if(pc->frame_start_found){
3027 /* EOF considered as end of frame */
3030 for(; i<buf_size; i++){
3031 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3032 if((state&0xFFFFFF00) == 0x100){
3033 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
3034 pc->frame_start_found=0;
3042 return END_NOT_FOUND;
3045 /* handle buffering and image synchronisation */
3046 static int mpeg_decode_frame(AVCodecContext *avctx,
3047 void *data, int *data_size,
3048 uint8_t *buf, int buf_size)
3050 Mpeg1Context *s = avctx->priv_data;
3051 const uint8_t *buf_end;
3052 const uint8_t *buf_ptr;
3053 uint32_t start_code;
3054 int ret, input_size;
3055 AVFrame *picture = data;
3056 MpegEncContext *s2 = &s->mpeg_enc_ctx;
3057 dprintf("fill_buffer\n");
3059 if (buf_size == 0) {
3060 /* special case for last picture */
3061 if (s2->low_delay==0 && s2->next_picture_ptr) {
3062 *picture= *(AVFrame*)s2->next_picture_ptr;
3063 s2->next_picture_ptr= NULL;
3065 *data_size = sizeof(AVFrame);
3070 if(s2->flags&CODEC_FLAG_TRUNCATED){
3071 int next= mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
3073 if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 )
3078 buf_end = buf + buf_size;
3081 if (s->repeat_field % 2 == 1) {
3083 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
3084 // s2->picture_number, s->repeat_field);
3085 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
3086 *data_size = sizeof(AVPicture);
3092 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
3093 vcr2_init_sequence(avctx);
3098 /* find start next code */
3100 buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
3101 if (start_code > 0x1ff){
3102 if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
3103 if(avctx->thread_count > 1){
3106 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
3107 for(i=0; i<s->slice_count; i++)
3108 s2->error_count += s2->thread_context[i]->error_count;
3110 if (slice_end(avctx, picture)) {
3111 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
3112 *data_size = sizeof(AVPicture);
3115 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
3118 input_size = buf_end - buf_ptr;
3120 if(avctx->debug & FF_DEBUG_STARTCODE){
3121 av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
3124 /* prepare data for next start code */
3125 switch(start_code) {
3126 case SEQ_START_CODE:
3127 mpeg1_decode_sequence(avctx, buf_ptr,
3131 case PICTURE_START_CODE:
3132 /* we have a complete image : we try to decompress it */
3133 mpeg1_decode_picture(avctx,
3134 buf_ptr, input_size);
3136 case EXT_START_CODE:
3137 mpeg_decode_extension(avctx,
3138 buf_ptr, input_size);
3140 case USER_START_CODE:
3141 mpeg_decode_user_data(avctx,
3142 buf_ptr, input_size);
3144 case GOP_START_CODE:
3146 mpeg_decode_gop(avctx,
3147 buf_ptr, input_size);
3150 if (start_code >= SLICE_MIN_START_CODE &&
3151 start_code <= SLICE_MAX_START_CODE) {
3152 int mb_y= start_code - SLICE_MIN_START_CODE;
3154 if(s2->last_picture_ptr==NULL){
3155 /* skip b frames if we dont have reference frames */
3156 if(s2->pict_type==B_TYPE) break;
3157 /* skip P frames if we dont have reference frame no valid header */
3158 // if(s2->pict_type==P_TYPE && s2->first_field && !s2->first_slice) break;
3160 /* skip b frames if we are in a hurry */
3161 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
3162 if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
3163 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
3164 || avctx->skip_frame >= AVDISCARD_ALL)
3166 /* skip everything if we are in a hurry>=5 */
3167 if(avctx->hurry_up>=5) break;
3169 if (!s->mpeg_enc_ctx_allocated) break;
3171 if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
3172 if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
3176 if(s2->first_slice){
3178 if(mpeg_field_start(s2) < 0)
3181 if(!s2->current_picture_ptr){
3182 av_log(avctx, AV_LOG_ERROR, "current_picture not initalized\n");
3186 if(avctx->thread_count > 1){
3187 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
3188 if(threshold <= mb_y){
3189 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
3191 thread_context->start_mb_y= mb_y;
3192 thread_context->end_mb_y = s2->mb_height;
3194 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
3195 ff_update_duplicate_context(thread_context, s2);
3197 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
3200 buf_ptr += 2; //FIXME add minimum num of bytes per slice
3202 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
3206 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
3207 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);
3209 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);
3218 static int mpeg_decode_end(AVCodecContext *avctx)
3220 Mpeg1Context *s = avctx->priv_data;
3222 if (s->mpeg_enc_ctx_allocated)
3223 MPV_common_end(&s->mpeg_enc_ctx);
3227 AVCodec mpeg1video_decoder = {
3230 CODEC_ID_MPEG1VIDEO,
3231 sizeof(Mpeg1Context),
3236 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3237 .flush= ff_mpeg_flush,
3240 AVCodec mpeg2video_decoder = {
3243 CODEC_ID_MPEG2VIDEO,
3244 sizeof(Mpeg1Context),
3249 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3250 .flush= ff_mpeg_flush,
3254 AVCodec mpegvideo_decoder = {
3257 CODEC_ID_MPEG2VIDEO,
3258 sizeof(Mpeg1Context),
3263 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3264 .flush= ff_mpeg_flush,
3267 #ifdef CONFIG_ENCODERS
3269 AVCodec mpeg1video_encoder = {
3272 CODEC_ID_MPEG1VIDEO,
3273 sizeof(MpegEncContext),
3277 .supported_framerates= ff_frame_rate_tab+1,
3278 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
3279 .capabilities= CODEC_CAP_DELAY,
3282 AVCodec mpeg2video_encoder = {
3285 CODEC_ID_MPEG2VIDEO,
3286 sizeof(MpegEncContext),
3290 .supported_framerates= ff_frame_rate_tab+1,
3291 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
3292 .capabilities= CODEC_CAP_DELAY,
3297 static int mpeg_mc_decode_init(AVCodecContext *avctx){
3300 if( avctx->thread_count > 1)
3302 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
3304 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
3305 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
3307 mpeg_decode_init(avctx);
3308 s = avctx->priv_data;
3310 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
3311 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
3316 AVCodec mpeg_xvmc_decoder = {
3319 CODEC_ID_MPEG2VIDEO_XVMC,
3320 sizeof(Mpeg1Context),
3321 mpeg_mc_decode_init,
3325 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
3326 .flush= ff_mpeg_flush,
3331 #ifdef CONFIG_MPEGVIDEO_PARSER
3332 static void mpegvideo_extract_headers(AVCodecParserContext *s,
3333 AVCodecContext *avctx,
3334 const uint8_t *buf, int buf_size)
3336 ParseContext1 *pc = s->priv_data;
3337 const uint8_t *buf_end;
3338 uint32_t start_code;
3339 int frame_rate_index, ext_type, bytes_left;
3340 int frame_rate_ext_n, frame_rate_ext_d;
3341 int picture_structure, top_field_first, repeat_first_field, progressive_frame;
3342 int horiz_size_ext, vert_size_ext, bit_rate_ext;
3343 //FIXME replace the crap with get_bits()
3345 buf_end = buf + buf_size;
3346 while (buf < buf_end) {
3348 buf= ff_find_start_code(buf, buf_end, &start_code);
3349 bytes_left = buf_end - buf;
3350 switch(start_code) {
3351 case PICTURE_START_CODE:
3352 if (bytes_left >= 2) {
3353 s->pict_type = (buf[1] >> 3) & 7;
3356 case SEQ_START_CODE:
3357 if (bytes_left >= 7) {
3358 pc->width = (buf[0] << 4) | (buf[1] >> 4);
3359 pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
3360 avcodec_set_dimensions(avctx, pc->width, pc->height);
3361 frame_rate_index = buf[3] & 0xf;
3362 pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
3363 pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
3364 avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
3365 avctx->codec_id = CODEC_ID_MPEG1VIDEO;
3369 case EXT_START_CODE:
3370 if (bytes_left >= 1) {
3371 ext_type = (buf[0] >> 4);
3373 case 0x1: /* sequence extension */
3374 if (bytes_left >= 6) {
3375 horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
3376 vert_size_ext = (buf[2] >> 5) & 3;
3377 bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
3378 frame_rate_ext_n = (buf[5] >> 5) & 3;
3379 frame_rate_ext_d = (buf[5] & 0x1f);
3380 pc->progressive_sequence = buf[1] & (1 << 3);
3381 avctx->has_b_frames= !(buf[5] >> 7);
3383 pc->width |=(horiz_size_ext << 12);
3384 pc->height |=( vert_size_ext << 12);
3385 avctx->bit_rate += (bit_rate_ext << 18) * 400;
3386 avcodec_set_dimensions(avctx, pc->width, pc->height);
3387 avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
3388 avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
3389 avctx->codec_id = CODEC_ID_MPEG2VIDEO;
3390 avctx->sub_id = 2; /* forces MPEG2 */
3393 case 0x8: /* picture coding extension */
3394 if (bytes_left >= 5) {
3395 picture_structure = buf[2]&3;
3396 top_field_first = buf[3] & (1 << 7);
3397 repeat_first_field = buf[3] & (1 << 1);
3398 progressive_frame = buf[4] & (1 << 7);
3400 /* check if we must repeat the frame */
3401 if (repeat_first_field) {
3402 if (pc->progressive_sequence) {
3403 if (top_field_first)
3407 } else if (progressive_frame) {
3412 /* the packet only represents half a frame
3413 XXX,FIXME maybe find a different solution */
3414 if(picture_structure != 3)
3415 s->repeat_pict = -1;
3424 /* we stop parsing when we encounter a slice. It ensures
3425 that this function takes a negligible amount of time */
3426 if (start_code >= SLICE_MIN_START_CODE &&
3427 start_code <= SLICE_MAX_START_CODE)
3435 static int mpegvideo_parse(AVCodecParserContext *s,
3436 AVCodecContext *avctx,
3437 uint8_t **poutbuf, int *poutbuf_size,
3438 const uint8_t *buf, int buf_size)
3440 ParseContext1 *pc1 = s->priv_data;
3441 ParseContext *pc= &pc1->pc;
3444 if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
3447 next= mpeg1_find_frame_end(pc, buf, buf_size);
3449 if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
3456 /* we have a full frame : we just parse the first few MPEG headers
3457 to have the full timing information. The time take by this
3458 function should be negligible for uncorrupted streams */
3459 mpegvideo_extract_headers(s, avctx, buf, buf_size);
3461 printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
3462 s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
3465 *poutbuf = (uint8_t *)buf;
3466 *poutbuf_size = buf_size;
3470 static int mpegvideo_split(AVCodecContext *avctx,
3471 const uint8_t *buf, int buf_size)
3476 for(i=0; i<buf_size; i++){
3477 state= (state<<8) | buf[i];
3478 if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
3484 AVCodecParser mpegvideo_parser = {
3485 { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
3486 sizeof(ParseContext1),
3492 #endif /* !CONFIG_MPEGVIDEO_PARSER */
3494 /* this is ugly i know, but the alternative is too make
3495 hundreds of vars global and prefix them with ff_mpeg1_
3496 which is far uglier. */