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"
34 #include "bytestream.h"
41 #define SEQ_END_CODE 0x000001b7
42 #define SEQ_START_CODE 0x000001b3
43 #define GOP_START_CODE 0x000001b8
44 #define PICTURE_START_CODE 0x00000100
45 #define SLICE_MIN_START_CODE 0x00000101
46 #define SLICE_MAX_START_CODE 0x000001af
47 #define EXT_START_CODE 0x000001b5
48 #define USER_START_CODE 0x000001b2
52 #define MBINCR_VLC_BITS 9
53 #define MB_PAT_VLC_BITS 9
54 #define MB_PTYPE_VLC_BITS 6
55 #define MB_BTYPE_VLC_BITS 6
56 #define TEX_VLC_BITS 9
58 #ifdef CONFIG_ENCODERS
59 static void mpeg1_encode_block(MpegEncContext *s,
62 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
63 #endif //CONFIG_ENCODERS
64 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
67 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
70 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
71 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
74 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
77 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
78 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
79 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
80 static void exchange_uv(MpegEncContext *s);
83 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
84 extern int XVMC_field_end(MpegEncContext *s);
85 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
86 extern void XVMC_init_block(MpegEncContext *s);//set s->block
89 static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
90 static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
91 static const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
92 static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
93 PIX_FMT_XVMC_MPEG2_IDCT,
94 PIX_FMT_XVMC_MPEG2_MC,
96 #ifdef CONFIG_ENCODERS
97 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
98 static uint8_t fcode_tab[MAX_MV*2+1];
100 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
101 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
103 /* simple include everything table for dc, first byte is bits number next 3 are code*/
104 static uint32_t mpeg1_lum_dc_uni[512];
105 static uint32_t mpeg1_chr_dc_uni[512];
107 static uint8_t mpeg1_index_run[2][64];
108 static int8_t mpeg1_max_level[2][64];
109 #endif //CONFIG_ENCODERS
111 static uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
113 static void init_2d_vlc_rl(RLTable *rl, int use_static)
117 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
118 &rl->table_vlc[0][1], 4, 2,
119 &rl->table_vlc[0][0], 4, 2, use_static);
122 rl->rl_vlc[0]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
124 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
126 for(i=0; i<rl->vlc.table_size; i++){
127 int code= rl->vlc.table[i][0];
128 int len = rl->vlc.table[i][1];
131 if(len==0){ // illegal code
134 }else if(len<0){ //more bits needed
138 if(code==rl->n){ //esc
141 }else if(code==rl->n+1){ //eob
145 run= rl->table_run [code] + 1;
146 level= rl->table_level[code];
149 rl->rl_vlc[0][i].len= len;
150 rl->rl_vlc[0][i].level= level;
151 rl->rl_vlc[0][i].run= run;
155 #ifdef CONFIG_ENCODERS
156 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
159 for(i=0; i<128; i++){
162 for(run=0; run<64; run++){
165 int alevel= FFABS(level);
166 int sign= (level>>31)&1;
168 if (alevel > rl->max_level[0][run])
171 code= rl->index_run[0][run] + alevel - 1;
173 if (code < 111 /* rl->n */) {
174 /* store the vlc & sign at once */
175 len= rl->table_vlc[code][1]+1;
176 bits= (rl->table_vlc[code][0]<<1) + sign;
178 len= rl->table_vlc[111/*rl->n*/][1]+6;
179 bits= rl->table_vlc[111/*rl->n*/][0]<<6;
189 bits|= 0x8001 + level + 255;
191 bits|= level & 0xffff;
196 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
202 static int find_frame_rate_index(MpegEncContext *s){
204 int64_t dmin= INT64_MAX;
208 int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
209 int64_t n1= 1001LL*s->avctx->time_base.den;
210 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
215 s->frame_rate_index= i;
224 static int encode_init(AVCodecContext *avctx)
226 MpegEncContext *s = avctx->priv_data;
228 if(MPV_encode_init(avctx) < 0)
231 if(find_frame_rate_index(s) < 0){
232 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
233 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
236 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);
240 if(avctx->profile == FF_PROFILE_UNKNOWN){
241 if(avctx->level != FF_LEVEL_UNKNOWN){
242 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
245 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
248 if(avctx->level == FF_LEVEL_UNKNOWN){
249 if(avctx->profile == 0){ /* 4:2:2 */
250 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
251 else avctx->level = 2; /* High */
253 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
254 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
257 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
258 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
259 else avctx->level = 4; /* High */
263 if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
264 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
271 static void put_header(MpegEncContext *s, int header)
273 align_put_bits(&s->pb);
274 put_bits(&s->pb, 16, header>>16);
275 put_bits(&s->pb, 16, header&0xFFFF);
278 /* put sequence header if needed */
279 static void mpeg1_encode_sequence_header(MpegEncContext *s)
281 unsigned int vbv_buffer_size;
285 float best_aspect_error= 1E10;
286 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
287 int constraint_parameter_flag;
289 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
291 if (s->current_picture.key_frame) {
292 AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
294 /* mpeg1 header repeated every gop */
295 put_header(s, SEQ_START_CODE);
297 put_bits(&s->pb, 12, s->width);
298 put_bits(&s->pb, 12, s->height);
301 float error= aspect_ratio;
302 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
303 error-= 1.0/mpeg1_aspect[i];
305 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
309 if(error < best_aspect_error){
310 best_aspect_error= error;
311 s->aspect_ratio_info= i;
315 put_bits(&s->pb, 4, s->aspect_ratio_info);
316 put_bits(&s->pb, 4, s->frame_rate_index);
318 if(s->avctx->rc_max_rate){
319 v = (s->avctx->rc_max_rate + 399) / 400;
320 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
326 if(s->avctx->rc_buffer_size)
327 vbv_buffer_size = s->avctx->rc_buffer_size;
329 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
330 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
331 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
333 put_bits(&s->pb, 18, v & 0x3FFFF);
334 put_bits(&s->pb, 1, 1); /* marker */
335 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
337 constraint_parameter_flag=
338 s->width <= 768 && s->height <= 576 &&
339 s->mb_width * s->mb_height <= 396 &&
340 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
341 framerate.num <= framerate.den*30 &&
342 s->avctx->me_range && s->avctx->me_range < 128 &&
343 vbv_buffer_size <= 20 &&
345 s->codec_id == CODEC_ID_MPEG1VIDEO;
347 put_bits(&s->pb, 1, constraint_parameter_flag);
349 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
350 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
352 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
353 put_header(s, EXT_START_CODE);
354 put_bits(&s->pb, 4, 1); //seq ext
356 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
358 put_bits(&s->pb, 3, s->avctx->profile); //profile
359 put_bits(&s->pb, 4, s->avctx->level); //level
361 put_bits(&s->pb, 1, s->progressive_sequence);
362 put_bits(&s->pb, 2, s->chroma_format);
363 put_bits(&s->pb, 2, 0); //horizontal size ext
364 put_bits(&s->pb, 2, 0); //vertical size ext
365 put_bits(&s->pb, 12, v>>18); //bitrate ext
366 put_bits(&s->pb, 1, 1); //marker
367 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
368 put_bits(&s->pb, 1, s->low_delay);
369 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
370 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
373 put_header(s, GOP_START_CODE);
374 put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
375 /* time code : we must convert from the real frame rate to a
376 fake mpeg frame rate in case of low frame rate */
377 fps = (framerate.num + framerate.den/2)/ framerate.den;
378 time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
380 s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
381 if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
382 /* only works for NTSC 29.97 */
383 int d = time_code / 17982;
384 int m = time_code % 17982;
385 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
386 time_code += 18 * d + 2 * ((m - 2) / 1798);
388 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
389 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
390 put_bits(&s->pb, 1, 1);
391 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
392 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
393 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
394 put_bits(&s->pb, 1, 0); /* broken link */
398 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
400 put_bits(&s->pb, 11, 0x008);
403 put_bits(&s->pb, mbAddrIncrTable[run][1],
404 mbAddrIncrTable[run][0]);
406 #endif //CONFIG_ENCODERS
408 static void common_init(MpegEncContext *s)
412 s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
416 void ff_mpeg1_clean_buffers(MpegEncContext *s){
417 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
418 s->last_dc[1] = s->last_dc[0];
419 s->last_dc[2] = s->last_dc[0];
420 memset(s->last_mv, 0, sizeof(s->last_mv));
423 #ifdef CONFIG_ENCODERS
425 static av_always_inline void put_qscale(MpegEncContext *s)
428 assert(s->qscale>=1 && s->qscale <=12);
429 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
431 put_bits(&s->pb, 5, s->qscale);
435 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
436 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
438 put_bits(&s->pb, 1, 0); /* slice extra information */
441 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
443 mpeg1_encode_sequence_header(s);
445 /* mpeg1 picture header */
446 put_header(s, PICTURE_START_CODE);
447 /* temporal reference */
449 // RAL: s->picture_number instead of s->fake_picture_number
450 put_bits(&s->pb, 10, (s->picture_number -
451 s->gop_picture_number) & 0x3ff);
452 put_bits(&s->pb, 3, s->pict_type);
454 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
455 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
457 // RAL: Forward f_code also needed for B frames
458 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
459 put_bits(&s->pb, 1, 0); /* half pel coordinates */
460 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
461 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
463 put_bits(&s->pb, 3, 7); /* forward_f_code */
466 // RAL: Backward f_code necessary for B frames
467 if (s->pict_type == B_TYPE) {
468 put_bits(&s->pb, 1, 0); /* half pel coordinates */
469 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
470 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
472 put_bits(&s->pb, 3, 7); /* backward_f_code */
475 put_bits(&s->pb, 1, 0); /* extra bit picture */
477 s->frame_pred_frame_dct = 1;
478 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
479 put_header(s, EXT_START_CODE);
480 put_bits(&s->pb, 4, 8); //pic ext
481 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
482 put_bits(&s->pb, 4, s->f_code);
483 put_bits(&s->pb, 4, s->f_code);
485 put_bits(&s->pb, 8, 255);
487 if (s->pict_type == B_TYPE) {
488 put_bits(&s->pb, 4, s->b_code);
489 put_bits(&s->pb, 4, s->b_code);
491 put_bits(&s->pb, 8, 255);
493 put_bits(&s->pb, 2, s->intra_dc_precision);
495 assert(s->picture_structure == PICT_FRAME);
496 put_bits(&s->pb, 2, s->picture_structure);
497 if (s->progressive_sequence) {
498 put_bits(&s->pb, 1, 0); /* no repeat */
500 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
502 /* XXX: optimize the generation of this flag with entropy
504 s->frame_pred_frame_dct = s->progressive_sequence;
506 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
507 put_bits(&s->pb, 1, s->concealment_motion_vectors);
508 put_bits(&s->pb, 1, s->q_scale_type);
509 put_bits(&s->pb, 1, s->intra_vlc_format);
510 put_bits(&s->pb, 1, s->alternate_scan);
511 put_bits(&s->pb, 1, s->repeat_first_field);
512 s->progressive_frame = s->progressive_sequence;
513 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
514 put_bits(&s->pb, 1, s->progressive_frame);
515 put_bits(&s->pb, 1, 0); //composite_display_flag
517 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
520 put_header(s, USER_START_CODE);
521 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
522 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
527 ff_mpeg1_encode_slice_header(s);
530 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
531 int has_mv, int field_motion)
533 put_bits(&s->pb, n, bits);
534 if (!s->frame_pred_frame_dct) {
536 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
537 put_bits(&s->pb, 1, s->interlaced_dct);
541 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
542 DCTELEM block[6][64],
543 int motion_x, int motion_y,
547 const int mb_x = s->mb_x;
548 const int mb_y = s->mb_y;
549 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
553 for(i=0;i<mb_block_count;i++) {
554 if (s->block_last_index[i] >= 0)
555 cbp |= 1 << (mb_block_count - 1 - i);
558 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
559 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
560 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
561 (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) |
562 ((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))) {
564 s->qscale -= s->dquant;
568 if(s->pict_type == P_TYPE){
569 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
570 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
574 assert(s->mb_skip_run == 0);
575 encode_mb_skip_run(s, s->mb_x);
577 encode_mb_skip_run(s, s->mb_skip_run);
580 if (s->pict_type == I_TYPE) {
581 if(s->dquant && cbp){
582 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
585 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
586 s->qscale -= s->dquant;
588 s->misc_bits+= get_bits_diff(s);
590 } else if (s->mb_intra) {
591 if(s->dquant && cbp){
592 put_mb_modes(s, 6, 0x01, 0, 0);
595 put_mb_modes(s, 5, 0x03, 0, 0);
596 s->qscale -= s->dquant;
598 s->misc_bits+= get_bits_diff(s);
600 memset(s->last_mv, 0, sizeof(s->last_mv));
601 } else if (s->pict_type == P_TYPE) {
602 if(s->mv_type == MV_TYPE_16X16){
604 if ((motion_x|motion_y) == 0) {
606 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
609 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
611 s->misc_bits+= get_bits_diff(s);
614 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
617 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
619 s->misc_bits+= get_bits_diff(s);
620 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
621 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
622 s->mv_bits+= get_bits_diff(s);
625 put_bits(&s->pb, 3, 1); /* motion only */
626 if (!s->frame_pred_frame_dct)
627 put_bits(&s->pb, 2, 2); /* motion_type: frame */
628 s->misc_bits+= get_bits_diff(s);
629 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
630 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
631 s->qscale -= s->dquant;
632 s->mv_bits+= get_bits_diff(s);
634 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
635 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
637 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
641 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
644 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
647 put_bits(&s->pb, 3, 1); /* motion only */
648 put_bits(&s->pb, 2, 1); /* motion_type: field */
649 s->qscale -= s->dquant;
651 s->misc_bits+= get_bits_diff(s);
653 put_bits(&s->pb, 1, s->field_select[0][i]);
654 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
655 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
656 s->last_mv[0][i][0]= s->mv[0][i][0];
657 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
659 s->mv_bits+= get_bits_diff(s);
662 if (s->chroma_y_shift) {
663 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
665 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
666 put_bits(&s->pb, 2, cbp & 3);
671 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
673 if(s->mv_type == MV_TYPE_16X16){
674 if (cbp){ // With coded bloc pattern
676 if(s->mv_dir == MV_DIR_FORWARD)
677 put_mb_modes(s, 6, 3, 1, 0);
679 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
682 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
684 }else{ // No coded bloc pattern
685 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
686 if (!s->frame_pred_frame_dct)
687 put_bits(&s->pb, 2, 2); /* motion_type: frame */
688 s->qscale -= s->dquant;
690 s->misc_bits += get_bits_diff(s);
691 if (s->mv_dir&MV_DIR_FORWARD){
692 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
693 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
694 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
695 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
698 if (s->mv_dir&MV_DIR_BACKWARD){
699 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
700 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
701 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
702 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
706 assert(s->mv_type == MV_TYPE_FIELD);
707 assert(!s->frame_pred_frame_dct);
708 if (cbp){ // With coded bloc pattern
710 if(s->mv_dir == MV_DIR_FORWARD)
711 put_mb_modes(s, 6, 3, 1, 1);
713 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
716 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
718 }else{ // No coded bloc pattern
719 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
720 put_bits(&s->pb, 2, 1); /* motion_type: field */
721 s->qscale -= s->dquant;
723 s->misc_bits += get_bits_diff(s);
724 if (s->mv_dir&MV_DIR_FORWARD){
726 put_bits(&s->pb, 1, s->field_select[0][i]);
727 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
728 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
729 s->last_mv[0][i][0]= s->mv[0][i][0];
730 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
734 if (s->mv_dir&MV_DIR_BACKWARD){
736 put_bits(&s->pb, 1, s->field_select[1][i]);
737 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
738 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
739 s->last_mv[1][i][0]= s->mv[1][i][0];
740 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
745 s->mv_bits += get_bits_diff(s);
747 if (s->chroma_y_shift) {
748 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
750 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
751 put_bits(&s->pb, 2, cbp & 3);
755 for(i=0;i<mb_block_count;i++) {
756 if (cbp & (1 << (mb_block_count - 1 - i))) {
757 mpeg1_encode_block(s, block[i], i);
762 s->i_tex_bits+= get_bits_diff(s);
764 s->p_tex_bits+= get_bits_diff(s);
768 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
770 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
771 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
774 // RAL: Parameter added: f_or_b_code
775 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
777 int code, bit_size, l, bits, range, sign;
783 mbMotionVectorTable[0][1],
784 mbMotionVectorTable[0][0]);
786 bit_size = f_or_b_code - 1;
787 range = 1 << bit_size;
788 /* modulo encoding */
789 l= INT_BIT - 5 - bit_size;
794 code = (val >> bit_size) + 1;
795 bits = val & (range - 1);
800 code = (val >> bit_size) + 1;
801 bits = val & (range - 1);
805 assert(code > 0 && code <= 16);
808 mbMotionVectorTable[code][1],
809 mbMotionVectorTable[code][0]);
811 put_bits(&s->pb, 1, sign);
813 put_bits(&s->pb, bit_size, bits);
818 void ff_mpeg1_encode_init(MpegEncContext *s)
830 init_rl(&rl_mpeg1, static_rl_table_store[0]);
831 init_rl(&rl_mpeg2, static_rl_table_store[1]);
835 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
836 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
839 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len);
840 if(s->intra_vlc_format)
841 init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
843 /* build unified dc encoding tables */
844 for(i=-255; i<256; i++)
852 index = av_log2(2*adiff);
854 bits= vlc_dc_lum_bits[index] + index;
855 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
856 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
858 bits= vlc_dc_chroma_bits[index] + index;
859 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
860 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
863 for(f_code=1; f_code<=MAX_FCODE; f_code++){
864 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
867 if(mv==0) len= mbMotionVectorTable[0][1];
869 int val, bit_size, range, code;
871 bit_size = f_code - 1;
872 range = 1 << bit_size;
878 code = (val >> bit_size) + 1;
880 len= mbMotionVectorTable[code][1] + 1 + bit_size;
882 len= mbMotionVectorTable[16][1] + 2 + bit_size;
886 mv_penalty[f_code][mv+MAX_MV]= len;
891 for(f_code=MAX_FCODE; f_code>0; f_code--){
892 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
893 fcode_tab[mv+MAX_MV]= f_code;
897 s->me.mv_penalty= mv_penalty;
898 s->fcode_tab= fcode_tab;
899 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
906 if (s->intra_vlc_format) {
907 s->intra_ac_vlc_length=
908 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
910 s->intra_ac_vlc_length=
911 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
913 s->inter_ac_vlc_length=
914 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
917 static inline void encode_dc(MpegEncContext *s, int diff, int component)
919 if(((unsigned) (diff+255)) >= 511){
923 index= av_log2_16bit(-2*diff);
926 index= av_log2_16bit(2*diff);
928 if (component == 0) {
931 vlc_dc_lum_bits[index] + index,
932 (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
936 vlc_dc_chroma_bits[index] + index,
937 (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
940 if (component == 0) {
943 mpeg1_lum_dc_uni[diff+255]&0xFF,
944 mpeg1_lum_dc_uni[diff+255]>>8);
948 mpeg1_chr_dc_uni[diff+255]&0xFF,
949 mpeg1_chr_dc_uni[diff+255]>>8);
954 static void mpeg1_encode_block(MpegEncContext *s,
958 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
960 const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
962 last_index = s->block_last_index[n];
966 component = (n <= 3 ? 0 : (n&1) + 1);
967 dc = block[0]; /* overflow is impossible */
968 diff = dc - s->last_dc[component];
969 encode_dc(s, diff, component);
970 s->last_dc[component] = dc;
972 if (s->intra_vlc_format)
973 table_vlc = rl_mpeg2.table_vlc;
975 /* encode the first coefficient : needs to be done here because
976 it is handled slightly differently */
978 if (abs(level) == 1) {
979 code = ((uint32_t)level >> 31); /* the sign bit */
980 put_bits(&s->pb, 2, code | 0x02);
989 /* now quantify & encode AC coefs */
990 last_non_zero = i - 1;
992 for(;i<=last_index;i++) {
993 j = s->intra_scantable.permutated[i];
998 dprintf(s->avctx, "level[%d]=%d\n", i, level);
1000 /* encode using VLC */
1002 run = i - last_non_zero - 1;
1005 MASK_ABS(sign, alevel)
1008 if (alevel <= mpeg1_max_level[0][run]){
1009 code= mpeg1_index_run[0][run] + alevel - 1;
1010 /* store the vlc & sign at once */
1011 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
1013 /* escape seems to be pretty rare <5% so i dont optimize it */
1014 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
1015 /* escape: only clip in this case */
1016 put_bits(&s->pb, 6, run);
1017 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
1019 put_bits(&s->pb, 8, level & 0xff);
1022 put_bits(&s->pb, 16, 0x8001 + level + 255);
1024 put_bits(&s->pb, 16, level & 0xffff);
1028 put_bits(&s->pb, 12, level & 0xfff);
1035 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
1037 #endif //CONFIG_ENCODERS
1039 /******************************************/
1042 static VLC dc_lum_vlc;
1043 static VLC dc_chroma_vlc;
1045 static VLC mbincr_vlc;
1046 static VLC mb_ptype_vlc;
1047 static VLC mb_btype_vlc;
1048 static VLC mb_pat_vlc;
1050 static void init_vlcs(void)
1052 static int done = 0;
1057 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
1058 vlc_dc_lum_bits, 1, 1,
1059 vlc_dc_lum_code, 2, 2, 1);
1060 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
1061 vlc_dc_chroma_bits, 1, 1,
1062 vlc_dc_chroma_code, 2, 2, 1);
1063 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
1064 &mbMotionVectorTable[0][1], 2, 1,
1065 &mbMotionVectorTable[0][0], 2, 1, 1);
1066 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
1067 &mbAddrIncrTable[0][1], 2, 1,
1068 &mbAddrIncrTable[0][0], 2, 1, 1);
1069 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
1070 &mbPatTable[0][1], 2, 1,
1071 &mbPatTable[0][0], 2, 1, 1);
1073 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
1074 &table_mb_ptype[0][1], 2, 1,
1075 &table_mb_ptype[0][0], 2, 1, 1);
1076 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
1077 &table_mb_btype[0][1], 2, 1,
1078 &table_mb_btype[0][0], 2, 1, 1);
1079 init_rl(&rl_mpeg1, static_rl_table_store[0]);
1080 init_rl(&rl_mpeg2, static_rl_table_store[1]);
1082 init_2d_vlc_rl(&rl_mpeg1, 1);
1083 init_2d_vlc_rl(&rl_mpeg2, 1);
1087 static inline int get_dmv(MpegEncContext *s)
1089 if(get_bits1(&s->gb))
1090 return 1 - (get_bits1(&s->gb) << 1);
1095 static inline int get_qscale(MpegEncContext *s)
1097 int qscale = get_bits(&s->gb, 5);
1098 if (s->q_scale_type) {
1099 return non_linear_qscale[qscale];
1105 /* motion type (for mpeg2) */
1111 static int mpeg_decode_mb(MpegEncContext *s,
1112 DCTELEM block[12][64])
1114 int i, j, k, cbp, val, mb_type, motion_type;
1115 const int mb_block_count = 4 + (1<< s->chroma_format);
1117 dprintf(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1119 assert(s->mb_skipped==0);
1121 if (s->mb_skip_run-- != 0) {
1122 if(s->pict_type == I_TYPE){
1123 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1130 s->block_last_index[i] = -1;
1131 if(s->picture_structure == PICT_FRAME)
1132 s->mv_type = MV_TYPE_16X16;
1134 s->mv_type = MV_TYPE_FIELD;
1135 if (s->pict_type == P_TYPE) {
1136 /* if P type, zero motion vector is implied */
1137 s->mv_dir = MV_DIR_FORWARD;
1138 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1139 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1140 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1141 s->field_select[0][0]= s->picture_structure - 1;
1143 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1148 mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
1150 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,
1151 if(IS_INTRA(mb_type))
1154 /* if B type, reuse previous vectors and directions */
1155 s->mv[0][0][0] = s->last_mv[0][0][0];
1156 s->mv[0][0][1] = s->last_mv[0][0][1];
1157 s->mv[1][0][0] = s->last_mv[1][0][0];
1158 s->mv[1][0][1] = s->last_mv[1][0][1];
1160 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1161 mb_type | MB_TYPE_SKIP;
1162 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1164 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1171 switch(s->pict_type) {
1174 if (get_bits1(&s->gb) == 0) {
1175 if (get_bits1(&s->gb) == 0){
1176 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1179 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1181 mb_type = MB_TYPE_INTRA;
1185 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1187 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1190 mb_type = ptype2mb_type[ mb_type ];
1193 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1195 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1198 mb_type = btype2mb_type[ mb_type ];
1201 dprintf(s->avctx, "mb_type=%x\n", mb_type);
1202 // motion_type = 0; /* avoid warning */
1203 if (IS_INTRA(mb_type)) {
1204 s->dsp.clear_blocks(s->block[0]);
1206 if(!s->chroma_y_shift){
1207 s->dsp.clear_blocks(s->block[6]);
1210 /* compute dct type */
1211 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1212 !s->frame_pred_frame_dct) {
1213 s->interlaced_dct = get_bits1(&s->gb);
1216 if (IS_QUANT(mb_type))
1217 s->qscale = get_qscale(s);
1219 if (s->concealment_motion_vectors) {
1220 /* just parse them */
1221 if (s->picture_structure != PICT_FRAME)
1222 skip_bits1(&s->gb); /* field select */
1224 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1225 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1226 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1227 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1229 skip_bits1(&s->gb); /* marker */
1231 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1234 //one 1 we memcpy blocks in xvmcvideo
1235 if(s->avctx->xvmc_acceleration > 1){
1236 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1243 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1244 if(s->flags2 & CODEC_FLAG2_FAST){
1246 mpeg2_fast_decode_block_intra(s, s->pblocks[i], i);
1249 for(i=0;i<mb_block_count;i++) {
1250 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1256 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1261 if (mb_type & MB_TYPE_ZERO_MV){
1262 assert(mb_type & MB_TYPE_CBP);
1264 /* compute dct type */
1265 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1266 !s->frame_pred_frame_dct) {
1267 s->interlaced_dct = get_bits1(&s->gb);
1270 if (IS_QUANT(mb_type))
1271 s->qscale = get_qscale(s);
1273 s->mv_dir = MV_DIR_FORWARD;
1274 if(s->picture_structure == PICT_FRAME)
1275 s->mv_type = MV_TYPE_16X16;
1277 s->mv_type = MV_TYPE_FIELD;
1278 mb_type |= MB_TYPE_INTERLACED;
1279 s->field_select[0][0]= s->picture_structure - 1;
1281 s->last_mv[0][0][0] = 0;
1282 s->last_mv[0][0][1] = 0;
1283 s->last_mv[0][1][0] = 0;
1284 s->last_mv[0][1][1] = 0;
1288 assert(mb_type & MB_TYPE_L0L1);
1289 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1290 /* get additional motion vector type */
1291 if (s->frame_pred_frame_dct)
1292 motion_type = MT_FRAME;
1294 motion_type = get_bits(&s->gb, 2);
1297 /* compute dct type */
1298 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1299 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1300 s->interlaced_dct = get_bits1(&s->gb);
1303 if (IS_QUANT(mb_type))
1304 s->qscale = get_qscale(s);
1306 /* motion vectors */
1309 if (USES_LIST(mb_type, i)) {
1310 s->mv_dir |= (MV_DIR_FORWARD >> i);
1311 dprintf(s->avctx, "motion_type=%d\n", motion_type);
1312 switch(motion_type) {
1313 case MT_FRAME: /* or MT_16X8 */
1314 if (s->picture_structure == PICT_FRAME) {
1316 mb_type |= MB_TYPE_16x16;
1317 s->mv_type = MV_TYPE_16X16;
1318 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1319 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1320 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1321 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1322 /* full_pel: only for mpeg1 */
1323 if (s->full_pel[i]){
1324 s->mv[i][0][0] <<= 1;
1325 s->mv[i][0][1] <<= 1;
1329 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1330 s->mv_type = MV_TYPE_16X8;
1332 s->field_select[i][j] = get_bits1(&s->gb);
1334 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1335 s->last_mv[i][j][k]);
1336 s->last_mv[i][j][k] = val;
1337 s->mv[i][j][k] = val;
1343 s->mv_type = MV_TYPE_FIELD;
1344 if (s->picture_structure == PICT_FRAME) {
1345 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1347 s->field_select[i][j] = get_bits1(&s->gb);
1348 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1349 s->last_mv[i][j][0]);
1350 s->last_mv[i][j][0] = val;
1351 s->mv[i][j][0] = val;
1352 dprintf(s->avctx, "fmx=%d\n", val);
1353 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1354 s->last_mv[i][j][1] >> 1);
1355 s->last_mv[i][j][1] = val << 1;
1356 s->mv[i][j][1] = val;
1357 dprintf(s->avctx, "fmy=%d\n", val);
1360 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1361 s->field_select[i][0] = get_bits1(&s->gb);
1363 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1364 s->last_mv[i][0][k]);
1365 s->last_mv[i][0][k] = val;
1366 s->last_mv[i][1][k] = val;
1367 s->mv[i][0][k] = val;
1373 int dmx, dmy, mx, my, m;
1375 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1376 s->last_mv[i][0][0]);
1377 s->last_mv[i][0][0] = mx;
1378 s->last_mv[i][1][0] = mx;
1380 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1381 s->last_mv[i][0][1] >> 1);
1383 s->mv_type = MV_TYPE_DMV;
1386 s->last_mv[i][0][1] = my<<1;
1387 s->last_mv[i][1][1] = my<<1;
1389 s->mv[i][0][0] = mx;
1390 s->mv[i][0][1] = my;
1391 s->mv[i][1][0] = mx;//not used
1392 s->mv[i][1][1] = my;//not used
1394 if (s->picture_structure == PICT_FRAME) {
1395 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1397 //m = 1 + 2 * s->top_field_first;
1398 m = s->top_field_first ? 1 : 3;
1400 /* top -> top pred */
1401 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1402 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1404 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1405 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1407 mb_type |= MB_TYPE_16x16;
1409 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1410 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1411 if(s->picture_structure == PICT_TOP_FIELD)
1419 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1427 if (HAS_CBP(mb_type)) {
1428 s->dsp.clear_blocks(s->block[0]);
1430 if(!s->chroma_y_shift){
1431 s->dsp.clear_blocks(s->block[6]);
1434 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1435 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
1436 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1439 if(mb_block_count > 6){
1440 cbp<<= mb_block_count-6;
1441 cbp |= get_bits(&s->gb, mb_block_count-6);
1445 //on 1 we memcpy blocks in xvmcvideo
1446 if(s->avctx->xvmc_acceleration > 1){
1447 XVMC_pack_pblocks(s,cbp);
1454 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1455 if(s->flags2 & CODEC_FLAG2_FAST){
1458 mpeg2_fast_decode_block_non_intra(s, s->pblocks[i], i);
1460 s->block_last_index[i] = -1;
1465 cbp<<= 12-mb_block_count;
1467 for(i=0;i<mb_block_count;i++) {
1468 if ( cbp & (1<<11) ) {
1469 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1472 s->block_last_index[i] = -1;
1478 if(s->flags2 & CODEC_FLAG2_FAST){
1481 mpeg1_fast_decode_block_inter(s, s->pblocks[i], i);
1483 s->block_last_index[i] = -1;
1490 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1493 s->block_last_index[i] = -1;
1501 s->block_last_index[i] = -1;
1505 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1510 /* as h263, but only 17 codes */
1511 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1513 int code, sign, val, l, shift;
1515 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1523 sign = get_bits1(&s->gb);
1527 val = (val - 1) << shift;
1528 val |= get_bits(&s->gb, shift);
1535 /* modulo decoding */
1536 l= INT_BIT - 5 - shift;
1541 static inline int decode_dc(GetBitContext *gb, int component)
1545 if (component == 0) {
1546 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1548 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1551 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1557 diff = get_xbits(gb, code);
1562 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1566 int level, dc, diff, i, j, run;
1568 RLTable *rl = &rl_mpeg1;
1569 uint8_t * const scantable= s->intra_scantable.permutated;
1570 const uint16_t *quant_matrix= s->intra_matrix;
1571 const int qscale= s->qscale;
1574 component = (n <= 3 ? 0 : n - 4 + 1);
1575 diff = decode_dc(&s->gb, component);
1578 dc = s->last_dc[component];
1580 s->last_dc[component] = dc;
1582 dprintf(s->avctx, "dc=%d diff=%d\n", dc, diff);
1585 OPEN_READER(re, &s->gb);
1586 /* now quantify & encode AC coefs */
1588 UPDATE_CACHE(re, &s->gb);
1589 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1593 } else if(level != 0) {
1596 level= (level*qscale*quant_matrix[j])>>4;
1598 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1599 LAST_SKIP_BITS(re, &s->gb, 1);
1602 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1603 UPDATE_CACHE(re, &s->gb);
1604 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1605 if (level == -128) {
1606 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1607 } else if (level == 0) {
1608 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1614 level= (level*qscale*quant_matrix[j])>>4;
1618 level= (level*qscale*quant_matrix[j])>>4;
1623 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1629 CLOSE_READER(re, &s->gb);
1631 s->block_last_index[n] = i;
1635 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1639 int level, i, j, run;
1640 RLTable *rl = &rl_mpeg1;
1641 uint8_t * const scantable= s->intra_scantable.permutated;
1642 const uint16_t *quant_matrix= s->inter_matrix;
1643 const int qscale= s->qscale;
1646 OPEN_READER(re, &s->gb);
1648 /* special case for the first coef. no need to add a second vlc table */
1649 UPDATE_CACHE(re, &s->gb);
1650 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1651 level= (3*qscale*quant_matrix[0])>>5;
1653 if(GET_CACHE(re, &s->gb)&0x40000000)
1657 SKIP_BITS(re, &s->gb, 2);
1658 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1662 /* now quantify & encode AC coefs */
1664 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1669 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1671 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1672 SKIP_BITS(re, &s->gb, 1);
1675 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1676 UPDATE_CACHE(re, &s->gb);
1677 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1678 if (level == -128) {
1679 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1680 } else if (level == 0) {
1681 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1687 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1691 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1696 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1701 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1703 UPDATE_CACHE(re, &s->gb);
1706 LAST_SKIP_BITS(re, &s->gb, 2);
1707 CLOSE_READER(re, &s->gb);
1709 s->block_last_index[n] = i;
1713 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
1715 int level, i, j, run;
1716 RLTable *rl = &rl_mpeg1;
1717 uint8_t * const scantable= s->intra_scantable.permutated;
1718 const int qscale= s->qscale;
1721 OPEN_READER(re, &s->gb);
1723 /* special case for the first coef. no need to add a second vlc table */
1724 UPDATE_CACHE(re, &s->gb);
1725 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1726 level= (3*qscale)>>1;
1728 if(GET_CACHE(re, &s->gb)&0x40000000)
1732 SKIP_BITS(re, &s->gb, 2);
1733 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1737 /* now quantify & encode AC coefs */
1739 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1744 level= ((level*2+1)*qscale)>>1;
1746 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1747 SKIP_BITS(re, &s->gb, 1);
1750 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1751 UPDATE_CACHE(re, &s->gb);
1752 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1753 if (level == -128) {
1754 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1755 } else if (level == 0) {
1756 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1762 level= ((level*2+1)*qscale)>>1;
1766 level= ((level*2+1)*qscale)>>1;
1772 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1774 UPDATE_CACHE(re, &s->gb);
1777 LAST_SKIP_BITS(re, &s->gb, 2);
1778 CLOSE_READER(re, &s->gb);
1780 s->block_last_index[n] = i;
1785 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1789 int level, i, j, run;
1790 RLTable *rl = &rl_mpeg1;
1791 uint8_t * const scantable= s->intra_scantable.permutated;
1792 const uint16_t *quant_matrix;
1793 const int qscale= s->qscale;
1799 OPEN_READER(re, &s->gb);
1802 quant_matrix = s->inter_matrix;
1804 quant_matrix = s->chroma_inter_matrix;
1806 /* special case for the first coef. no need to add a second vlc table */
1807 UPDATE_CACHE(re, &s->gb);
1808 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1809 level= (3*qscale*quant_matrix[0])>>5;
1810 if(GET_CACHE(re, &s->gb)&0x40000000)
1815 SKIP_BITS(re, &s->gb, 2);
1816 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1820 /* now quantify & encode AC coefs */
1822 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1827 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1828 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1829 SKIP_BITS(re, &s->gb, 1);
1832 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1833 UPDATE_CACHE(re, &s->gb);
1834 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1839 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1842 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1846 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1852 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1854 UPDATE_CACHE(re, &s->gb);
1857 LAST_SKIP_BITS(re, &s->gb, 2);
1858 CLOSE_READER(re, &s->gb);
1860 block[63] ^= (mismatch & 1);
1862 s->block_last_index[n] = i;
1866 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
1870 int level, i, j, run;
1871 RLTable *rl = &rl_mpeg1;
1872 uint8_t * const scantable= s->intra_scantable.permutated;
1873 const int qscale= s->qscale;
1874 OPEN_READER(re, &s->gb);
1877 /* special case for the first coef. no need to add a second vlc table */
1878 UPDATE_CACHE(re, &s->gb);
1879 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1880 level= (3*qscale)>>1;
1881 if(GET_CACHE(re, &s->gb)&0x40000000)
1885 SKIP_BITS(re, &s->gb, 2);
1886 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1890 /* now quantify & encode AC coefs */
1892 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1897 level= ((level*2+1)*qscale)>>1;
1898 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1899 SKIP_BITS(re, &s->gb, 1);
1902 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1903 UPDATE_CACHE(re, &s->gb);
1904 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1909 level= ((-level*2+1)*qscale)>>1;
1912 level= ((level*2+1)*qscale)>>1;
1917 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1919 UPDATE_CACHE(re, &s->gb);
1922 LAST_SKIP_BITS(re, &s->gb, 2);
1923 CLOSE_READER(re, &s->gb);
1924 s->block_last_index[n] = i;
1929 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1933 int level, dc, diff, i, j, run;
1936 uint8_t * const scantable= s->intra_scantable.permutated;
1937 const uint16_t *quant_matrix;
1938 const int qscale= s->qscale;
1943 quant_matrix = s->intra_matrix;
1946 quant_matrix = s->chroma_intra_matrix;
1947 component = (n&1) + 1;
1949 diff = decode_dc(&s->gb, component);
1952 dc = s->last_dc[component];
1954 s->last_dc[component] = dc;
1955 block[0] = dc << (3 - s->intra_dc_precision);
1956 dprintf(s->avctx, "dc=%d\n", block[0]);
1957 mismatch = block[0] ^ 1;
1959 if (s->intra_vlc_format)
1965 OPEN_READER(re, &s->gb);
1966 /* now quantify & encode AC coefs */
1968 UPDATE_CACHE(re, &s->gb);
1969 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1973 } else if(level != 0) {
1976 level= (level*qscale*quant_matrix[j])>>4;
1977 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1978 LAST_SKIP_BITS(re, &s->gb, 1);
1981 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1982 UPDATE_CACHE(re, &s->gb);
1983 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1987 level= (-level*qscale*quant_matrix[j])>>4;
1990 level= (level*qscale*quant_matrix[j])>>4;
1994 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
2001 CLOSE_READER(re, &s->gb);
2003 block[63]^= mismatch&1;
2005 s->block_last_index[n] = i;
2009 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
2013 int level, dc, diff, j, run;
2016 uint8_t * scantable= s->intra_scantable.permutated;
2017 const uint16_t *quant_matrix;
2018 const int qscale= s->qscale;
2022 quant_matrix = s->intra_matrix;
2025 quant_matrix = s->chroma_intra_matrix;
2026 component = (n&1) + 1;
2028 diff = decode_dc(&s->gb, component);
2031 dc = s->last_dc[component];
2033 s->last_dc[component] = dc;
2034 block[0] = dc << (3 - s->intra_dc_precision);
2035 if (s->intra_vlc_format)
2041 OPEN_READER(re, &s->gb);
2042 /* now quantify & encode AC coefs */
2044 UPDATE_CACHE(re, &s->gb);
2045 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
2049 } else if(level != 0) {
2052 level= (level*qscale*quant_matrix[j])>>4;
2053 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
2054 LAST_SKIP_BITS(re, &s->gb, 1);
2057 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
2058 UPDATE_CACHE(re, &s->gb);
2059 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
2063 level= (-level*qscale*quant_matrix[j])>>4;
2066 level= (level*qscale*quant_matrix[j])>>4;
2072 CLOSE_READER(re, &s->gb);
2075 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
2079 typedef struct Mpeg1Context {
2080 MpegEncContext mpeg_enc_ctx;
2081 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
2082 int repeat_field; /* true if we must repeat the field */
2083 AVPanScan pan_scan; /** some temporary storage for the panscan */
2085 int swap_uv;//indicate VCR2
2086 int save_aspect_info;
2087 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
2091 static int mpeg_decode_init(AVCodecContext *avctx)
2093 Mpeg1Context *s = avctx->priv_data;
2094 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2097 //we need some parmutation to store
2098 //matrixes, until MPV_common_init()
2099 //set the real permutatuon
2101 s2->dsp.idct_permutation[i]=i;
2103 MPV_decode_defaults(s2);
2105 s->mpeg_enc_ctx.avctx= avctx;
2106 s->mpeg_enc_ctx.flags= avctx->flags;
2107 s->mpeg_enc_ctx.flags2= avctx->flags2;
2108 common_init(&s->mpeg_enc_ctx);
2111 s->mpeg_enc_ctx_allocated = 0;
2112 s->mpeg_enc_ctx.picture_number = 0;
2113 s->repeat_field = 0;
2114 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
2118 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
2119 const uint8_t *new_perm){
2120 uint16_t temp_matrix[64];
2123 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
2126 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
2130 //Call this function when we know all parameters
2131 //it may be called in different places for mpeg1 and mpeg2
2132 static int mpeg_decode_postinit(AVCodecContext *avctx){
2133 Mpeg1Context *s1 = avctx->priv_data;
2134 MpegEncContext *s = &s1->mpeg_enc_ctx;
2135 uint8_t old_permutation[64];
2138 (s1->mpeg_enc_ctx_allocated == 0)||
2139 avctx->coded_width != s->width ||
2140 avctx->coded_height != s->height||
2141 s1->save_aspect_info != s->aspect_ratio_info||
2145 if (s1->mpeg_enc_ctx_allocated) {
2146 ParseContext pc= s->parse_context;
2147 s->parse_context.buffer=0;
2149 s->parse_context= pc;
2152 if( (s->width == 0 )||(s->height == 0))
2155 avcodec_set_dimensions(avctx, s->width, s->height);
2156 avctx->bit_rate = s->bit_rate;
2157 s1->save_aspect_info = s->aspect_ratio_info;
2159 //low_delay may be forced, in this case we will have B frames
2160 //that behave like P frames
2161 avctx->has_b_frames = !(s->low_delay);
2163 if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
2165 avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
2166 avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
2168 avctx->sample_aspect_ratio= av_d2q(
2169 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
2174 &s->avctx->time_base.den,
2175 &s->avctx->time_base.num,
2176 ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
2177 ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
2180 if(s->aspect_ratio_info > 1){
2181 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
2182 s->avctx->sample_aspect_ratio=
2184 mpeg2_aspect[s->aspect_ratio_info],
2185 (AVRational){s->width, s->height}
2188 s->avctx->sample_aspect_ratio=
2190 mpeg2_aspect[s->aspect_ratio_info],
2191 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
2195 s->avctx->sample_aspect_ratio=
2196 mpeg2_aspect[s->aspect_ratio_info];
2200 if(avctx->xvmc_acceleration){
2201 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2203 if(s->chroma_format < 2){
2204 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2206 if(s->chroma_format == 2){
2207 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
2209 if(s->chroma_format > 2){
2210 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
2213 //until then pix_fmt may be changed right after codec init
2214 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2215 if( avctx->idct_algo == FF_IDCT_AUTO )
2216 avctx->idct_algo = FF_IDCT_SIMPLE;
2218 //quantization matrixes may need reordering
2219 //if dct permutation is changed
2220 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
2222 if (MPV_common_init(s) < 0)
2225 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
2226 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
2227 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
2228 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
2230 s1->mpeg_enc_ctx_allocated = 1;
2235 static int mpeg1_decode_picture(AVCodecContext *avctx,
2236 const uint8_t *buf, int buf_size)
2238 Mpeg1Context *s1 = avctx->priv_data;
2239 MpegEncContext *s = &s1->mpeg_enc_ctx;
2240 int ref, f_code, vbv_delay;
2242 if(mpeg_decode_postinit(s->avctx) < 0)
2245 init_get_bits(&s->gb, buf, buf_size*8);
2247 ref = get_bits(&s->gb, 10); /* temporal ref */
2248 s->pict_type = get_bits(&s->gb, 3);
2249 if(s->pict_type == 0 || s->pict_type > 3)
2252 vbv_delay= get_bits(&s->gb, 16);
2253 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
2254 s->full_pel[0] = get_bits1(&s->gb);
2255 f_code = get_bits(&s->gb, 3);
2256 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2258 s->mpeg_f_code[0][0] = f_code;
2259 s->mpeg_f_code[0][1] = f_code;
2261 if (s->pict_type == B_TYPE) {
2262 s->full_pel[1] = get_bits1(&s->gb);
2263 f_code = get_bits(&s->gb, 3);
2264 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2266 s->mpeg_f_code[1][0] = f_code;
2267 s->mpeg_f_code[1][1] = f_code;
2269 s->current_picture.pict_type= s->pict_type;
2270 s->current_picture.key_frame= s->pict_type == I_TYPE;
2272 if(avctx->debug & FF_DEBUG_PICT_INFO)
2273 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
2281 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
2283 MpegEncContext *s= &s1->mpeg_enc_ctx;
2284 int horiz_size_ext, vert_size_ext;
2287 skip_bits(&s->gb, 1); /* profil and level esc*/
2288 s->avctx->profile= get_bits(&s->gb, 3);
2289 s->avctx->level= get_bits(&s->gb, 4);
2290 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
2291 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
2292 horiz_size_ext = get_bits(&s->gb, 2);
2293 vert_size_ext = get_bits(&s->gb, 2);
2294 s->width |= (horiz_size_ext << 12);
2295 s->height |= (vert_size_ext << 12);
2296 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
2297 s->bit_rate += (bit_rate_ext << 18) * 400;
2298 skip_bits1(&s->gb); /* marker */
2299 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
2301 s->low_delay = get_bits1(&s->gb);
2302 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2304 s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
2305 s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
2307 dprintf(s->avctx, "sequence extension\n");
2308 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2309 s->avctx->sub_id = 2; /* indicates mpeg2 found */
2311 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2312 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
2313 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
2317 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
2319 MpegEncContext *s= &s1->mpeg_enc_ctx;
2320 int color_description, w, h;
2322 skip_bits(&s->gb, 3); /* video format */
2323 color_description= get_bits1(&s->gb);
2324 if(color_description){
2325 skip_bits(&s->gb, 8); /* color primaries */
2326 skip_bits(&s->gb, 8); /* transfer_characteristics */
2327 skip_bits(&s->gb, 8); /* matrix_coefficients */
2329 w= get_bits(&s->gb, 14);
2330 skip_bits(&s->gb, 1); //marker
2331 h= get_bits(&s->gb, 14);
2332 skip_bits(&s->gb, 1); //marker
2334 s1->pan_scan.width= 16*w;
2335 s1->pan_scan.height=16*h;
2337 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2338 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
2341 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
2343 MpegEncContext *s= &s1->mpeg_enc_ctx;
2347 if(s->progressive_sequence){
2348 if(s->repeat_first_field){
2350 if(s->top_field_first)
2354 if(s->picture_structure == PICT_FRAME){
2356 if(s->repeat_first_field)
2360 for(i=0; i<nofco; i++){
2361 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
2362 skip_bits(&s->gb, 1); //marker
2363 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
2364 skip_bits(&s->gb, 1); //marker
2367 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2368 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
2369 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
2370 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
2371 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
2375 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
2379 dprintf(s->avctx, "matrix extension\n");
2381 if (get_bits1(&s->gb)) {
2383 v = get_bits(&s->gb, 8);
2384 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2385 s->intra_matrix[j] = v;
2386 s->chroma_intra_matrix[j] = v;
2389 if (get_bits1(&s->gb)) {
2391 v = get_bits(&s->gb, 8);
2392 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2393 s->inter_matrix[j] = v;
2394 s->chroma_inter_matrix[j] = v;
2397 if (get_bits1(&s->gb)) {
2399 v = get_bits(&s->gb, 8);
2400 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2401 s->chroma_intra_matrix[j] = v;
2404 if (get_bits1(&s->gb)) {
2406 v = get_bits(&s->gb, 8);
2407 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2408 s->chroma_inter_matrix[j] = v;
2413 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
2415 s->full_pel[0] = s->full_pel[1] = 0;
2416 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
2417 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
2418 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
2419 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
2420 s->intra_dc_precision = get_bits(&s->gb, 2);
2421 s->picture_structure = get_bits(&s->gb, 2);
2422 s->top_field_first = get_bits1(&s->gb);
2423 s->frame_pred_frame_dct = get_bits1(&s->gb);
2424 s->concealment_motion_vectors = get_bits1(&s->gb);
2425 s->q_scale_type = get_bits1(&s->gb);
2426 s->intra_vlc_format = get_bits1(&s->gb);
2427 s->alternate_scan = get_bits1(&s->gb);
2428 s->repeat_first_field = get_bits1(&s->gb);
2429 s->chroma_420_type = get_bits1(&s->gb);
2430 s->progressive_frame = get_bits1(&s->gb);
2432 if(s->picture_structure == PICT_FRAME){
2434 s->v_edge_pos= 16*s->mb_height;
2436 s->first_field ^= 1;
2437 s->v_edge_pos= 8*s->mb_height;
2438 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
2441 if(s->alternate_scan){
2442 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2443 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
2445 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2446 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
2449 /* composite display not parsed */
2450 dprintf(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
2451 dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure);
2452 dprintf(s->avctx, "top field first=%d\n", s->top_field_first);
2453 dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
2454 dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
2455 dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
2456 dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
2457 dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2458 dprintf(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
2461 static void mpeg_decode_extension(AVCodecContext *avctx,
2462 const uint8_t *buf, int buf_size)
2464 Mpeg1Context *s1 = avctx->priv_data;
2465 MpegEncContext *s = &s1->mpeg_enc_ctx;
2468 init_get_bits(&s->gb, buf, buf_size*8);
2470 ext_type = get_bits(&s->gb, 4);
2473 mpeg_decode_sequence_extension(s1);
2476 mpeg_decode_sequence_display_extension(s1);
2479 mpeg_decode_quant_matrix_extension(s);
2482 mpeg_decode_picture_display_extension(s1);
2485 mpeg_decode_picture_coding_extension(s);
2490 static void exchange_uv(MpegEncContext *s){
2491 short * tmp = s->pblocks[4];
2492 s->pblocks[4] = s->pblocks[5];
2493 s->pblocks[5] = tmp;
2496 static int mpeg_field_start(MpegEncContext *s){
2497 AVCodecContext *avctx= s->avctx;
2498 Mpeg1Context *s1 = (Mpeg1Context*)s;
2500 /* start frame decoding */
2501 if(s->first_field || s->picture_structure==PICT_FRAME){
2502 if(MPV_frame_start(s, avctx) < 0)
2505 ff_er_frame_start(s);
2507 /* first check if we must repeat the frame */
2508 s->current_picture_ptr->repeat_pict = 0;
2509 if (s->repeat_first_field) {
2510 if (s->progressive_sequence) {
2511 if (s->top_field_first)
2512 s->current_picture_ptr->repeat_pict = 4;
2514 s->current_picture_ptr->repeat_pict = 2;
2515 } else if (s->progressive_frame) {
2516 s->current_picture_ptr->repeat_pict = 1;
2520 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2521 }else{ //second field
2524 if(!s->current_picture_ptr){
2525 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2530 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2531 if(s->picture_structure == PICT_BOTTOM_FIELD){
2532 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2537 // MPV_frame_start will call this function too,
2538 // but we need to call it on every field
2539 if(s->avctx->xvmc_acceleration)
2540 XVMC_field_start(s,avctx);
2546 #define DECODE_SLICE_ERROR -1
2547 #define DECODE_SLICE_OK 0
2550 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2551 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2552 * DECODE_SLICE_OK if this slice is ok<br>
2554 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
2555 const uint8_t **buf, int buf_size)
2557 MpegEncContext *s = &s1->mpeg_enc_ctx;
2558 AVCodecContext *avctx= s->avctx;
2560 const int field_pic= s->picture_structure != PICT_FRAME;
2561 const int lowres= s->avctx->lowres;
2566 if (mb_y<<field_pic >= s->mb_height){
2567 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
2571 init_get_bits(&s->gb, *buf, buf_size*8);
2573 ff_mpeg1_clean_buffers(s);
2574 s->interlaced_dct = 0;
2576 s->qscale = get_qscale(s);
2579 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2583 /* extra slice info */
2584 while (get_bits1(&s->gb) != 0) {
2585 skip_bits(&s->gb, 8);
2591 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2593 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2600 /* otherwise, stuffing, nothing to do */
2606 if(s->mb_x >= (unsigned)s->mb_width){
2607 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
2611 s->resync_mb_x= s->mb_x;
2612 s->resync_mb_y= s->mb_y= mb_y;
2614 ff_init_block_index(s);
2616 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2617 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2618 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",
2619 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],
2620 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2621 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2622 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2623 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2629 //one 1 we memcpy blocks in xvmcvideo
2630 if(s->avctx->xvmc_acceleration > 1)
2631 XVMC_init_block(s);//set s->block
2634 ret = mpeg_decode_mb(s, s->block);
2635 s->chroma_qscale= s->qscale;
2637 dprintf(s->avctx, "ret=%d\n", ret);
2641 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2642 const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
2643 int xy = s->mb_x*2 + s->mb_y*2*wrap;
2644 int motion_x, motion_y, dir, i;
2645 if(field_pic && !s->first_field)
2649 for(dir=0; dir<2; dir++){
2650 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2651 motion_x = motion_y = 0;
2652 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
2653 motion_x = s->mv[dir][0][0];
2654 motion_y = s->mv[dir][0][1];
2655 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2656 motion_x = s->mv[dir][i][0];
2657 motion_y = s->mv[dir][i][1];
2660 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2661 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2662 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2663 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
2664 s->current_picture.ref_index [dir][xy ]=
2665 s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
2666 assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
2672 s->dest[0] += 16 >> lowres;
2673 s->dest[1] += 16 >> (s->chroma_x_shift + lowres);
2674 s->dest[2] += 16 >> (s->chroma_x_shift + lowres);
2676 MPV_decode_mb(s, s->block);
2678 if (++s->mb_x >= s->mb_width) {
2679 const int mb_size= 16>>s->avctx->lowres;
2681 ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size);
2686 if(s->mb_y<<field_pic >= s->mb_height){
2687 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2688 int is_d10= s->chroma_format==2 && s->pict_type==I_TYPE && avctx->profile==0 && avctx->level==5
2689 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
2690 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
2692 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
2693 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2694 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
2700 ff_init_block_index(s);
2703 /* skip mb handling */
2704 if (s->mb_skip_run == -1) {
2705 /* read again increment */
2708 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2710 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2715 s->mb_skip_run += 33;
2716 }else if(code == 35){
2717 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2718 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2721 goto eos; /* end of slice */
2723 /* otherwise, stuffing, nothing to do */
2725 s->mb_skip_run += code;
2731 eos: // end of slice
2732 *buf += get_bits_count(&s->gb)/8 - 1;
2733 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2737 static int slice_decode_thread(AVCodecContext *c, void *arg){
2738 MpegEncContext *s= arg;
2739 const uint8_t *buf= s->gb.buffer;
2740 int mb_y= s->start_mb_y;
2742 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2745 uint32_t start_code;
2748 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2750 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2751 //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);
2753 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2754 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);
2756 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);
2759 if(s->mb_y == s->end_mb_y)
2763 buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
2764 mb_y= start_code - SLICE_MIN_START_CODE;
2765 if(mb_y < 0 || mb_y >= s->end_mb_y)
2769 return 0; //not reached
2773 * handles slice ends.
2774 * @return 1 if it seems to be the last slice of
2776 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2778 Mpeg1Context *s1 = avctx->priv_data;
2779 MpegEncContext *s = &s1->mpeg_enc_ctx;
2781 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2785 if(s->avctx->xvmc_acceleration)
2788 /* end of slice reached */
2789 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2792 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2798 if (s->pict_type == B_TYPE || s->low_delay) {
2799 *pict= *(AVFrame*)s->current_picture_ptr;
2800 ff_print_debug_info(s, pict);
2802 s->picture_number++;
2803 /* latency of 1 frame for I and P frames */
2804 /* XXX: use another variable than picture_number */
2805 if (s->last_picture_ptr != NULL) {
2806 *pict= *(AVFrame*)s->last_picture_ptr;
2807 ff_print_debug_info(s, pict);
2817 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2818 const uint8_t *buf, int buf_size)
2820 Mpeg1Context *s1 = avctx->priv_data;
2821 MpegEncContext *s = &s1->mpeg_enc_ctx;
2825 init_get_bits(&s->gb, buf, buf_size*8);
2827 width = get_bits(&s->gb, 12);
2828 height = get_bits(&s->gb, 12);
2829 if (width <= 0 || height <= 0 ||
2830 (width % 2) != 0 || (height % 2) != 0)
2832 s->aspect_ratio_info= get_bits(&s->gb, 4);
2833 if (s->aspect_ratio_info == 0)
2835 s->frame_rate_index = get_bits(&s->gb, 4);
2836 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2838 s->bit_rate = get_bits(&s->gb, 18) * 400;
2839 if (get_bits1(&s->gb) == 0) /* marker */
2844 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2845 skip_bits(&s->gb, 1);
2848 if (get_bits1(&s->gb)) {
2850 v = get_bits(&s->gb, 8);
2852 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2855 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2856 s->intra_matrix[j] = v;
2857 s->chroma_intra_matrix[j] = v;
2860 dprintf(s->avctx, "intra matrix present\n");
2862 dprintf(s->avctx, " %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
2863 dprintf(s->avctx, "\n");
2867 j = s->dsp.idct_permutation[i];
2868 v = ff_mpeg1_default_intra_matrix[i];
2869 s->intra_matrix[j] = v;
2870 s->chroma_intra_matrix[j] = v;
2873 if (get_bits1(&s->gb)) {
2875 v = get_bits(&s->gb, 8);
2877 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2880 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2881 s->inter_matrix[j] = v;
2882 s->chroma_inter_matrix[j] = v;
2885 dprintf(s->avctx, "non intra matrix present\n");
2887 dprintf(s->avctx, " %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
2888 dprintf(s->avctx, "\n");
2892 int j= s->dsp.idct_permutation[i];
2893 v = ff_mpeg1_default_non_intra_matrix[i];
2894 s->inter_matrix[j] = v;
2895 s->chroma_inter_matrix[j] = v;
2899 if(show_bits(&s->gb, 23) != 0){
2900 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2904 /* we set mpeg2 parameters so that it emulates mpeg1 */
2905 s->progressive_sequence = 1;
2906 s->progressive_frame = 1;
2907 s->picture_structure = PICT_FRAME;
2908 s->frame_pred_frame_dct = 1;
2909 s->chroma_format = 1;
2910 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2911 avctx->sub_id = 1; /* indicates mpeg1 */
2912 s->out_format = FMT_MPEG1;
2913 s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
2914 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2916 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2917 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2918 s->avctx->rc_buffer_size, s->bit_rate);
2923 static int vcr2_init_sequence(AVCodecContext *avctx)
2925 Mpeg1Context *s1 = avctx->priv_data;
2926 MpegEncContext *s = &s1->mpeg_enc_ctx;
2929 /* start new mpeg1 context decoding */
2930 s->out_format = FMT_MPEG1;
2931 if (s1->mpeg_enc_ctx_allocated) {
2934 s->width = avctx->coded_width;
2935 s->height = avctx->coded_height;
2936 avctx->has_b_frames= 0; //true?
2939 if(avctx->xvmc_acceleration){
2940 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2942 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2945 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2946 if( avctx->idct_algo == FF_IDCT_AUTO )
2947 avctx->idct_algo = FF_IDCT_SIMPLE;
2949 if (MPV_common_init(s) < 0)
2951 exchange_uv(s);//common init reset pblocks, so we swap them here
2952 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2953 s1->mpeg_enc_ctx_allocated = 1;
2956 int j= s->dsp.idct_permutation[i];
2957 v = ff_mpeg1_default_intra_matrix[i];
2958 s->intra_matrix[j] = v;
2959 s->chroma_intra_matrix[j] = v;
2961 v = ff_mpeg1_default_non_intra_matrix[i];
2962 s->inter_matrix[j] = v;
2963 s->chroma_inter_matrix[j] = v;
2966 s->progressive_sequence = 1;
2967 s->progressive_frame = 1;
2968 s->picture_structure = PICT_FRAME;
2969 s->frame_pred_frame_dct = 1;
2970 s->chroma_format = 1;
2971 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2972 avctx->sub_id = 2; /* indicates mpeg2 */
2977 static void mpeg_decode_user_data(AVCodecContext *avctx,
2978 const uint8_t *buf, int buf_size)
2985 /* we parse the DTG active format information */
2987 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
3001 avctx->dtg_active_format = p[0] & 0x0f;
3006 static void mpeg_decode_gop(AVCodecContext *avctx,
3007 const uint8_t *buf, int buf_size){
3008 Mpeg1Context *s1 = avctx->priv_data;
3009 MpegEncContext *s = &s1->mpeg_enc_ctx;
3011 int drop_frame_flag;
3012 int time_code_hours, time_code_minutes;
3013 int time_code_seconds, time_code_pictures;
3016 init_get_bits(&s->gb, buf, buf_size*8);
3018 drop_frame_flag = get_bits1(&s->gb);
3020 time_code_hours=get_bits(&s->gb,5);
3021 time_code_minutes = get_bits(&s->gb,6);
3022 skip_bits1(&s->gb);//marker bit
3023 time_code_seconds = get_bits(&s->gb,6);
3024 time_code_pictures = get_bits(&s->gb,6);
3026 /*broken_link indicate that after editing the
3027 reference frames of the first B-Frames after GOP I-Frame
3028 are missing (open gop)*/
3029 broken_link = get_bits1(&s->gb);
3031 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
3032 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
3033 time_code_hours, time_code_minutes, time_code_seconds,
3034 time_code_pictures, broken_link);
3037 * finds the end of the current frame in the bitstream.
3038 * @return the position of the first byte of the next frame, or -1
3040 static int mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
3043 uint32_t state= pc->state;
3046 if(!pc->frame_start_found){
3047 for(i=0; i<buf_size; i++){
3048 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3049 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
3051 pc->frame_start_found=1;
3057 if(pc->frame_start_found){
3058 /* EOF considered as end of frame */
3061 for(; i<buf_size; i++){
3062 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3063 if((state&0xFFFFFF00) == 0x100){
3064 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
3065 pc->frame_start_found=0;
3073 return END_NOT_FOUND;
3076 /* handle buffering and image synchronisation */
3077 static int mpeg_decode_frame(AVCodecContext *avctx,
3078 void *data, int *data_size,
3079 uint8_t *buf, int buf_size)
3081 Mpeg1Context *s = avctx->priv_data;
3082 const uint8_t *buf_end;
3083 const uint8_t *buf_ptr;
3084 uint32_t start_code;
3085 int ret, input_size;
3086 AVFrame *picture = data;
3087 MpegEncContext *s2 = &s->mpeg_enc_ctx;
3088 dprintf(avctx, "fill_buffer\n");
3090 if (buf_size == 0) {
3091 /* special case for last picture */
3092 if (s2->low_delay==0 && s2->next_picture_ptr) {
3093 *picture= *(AVFrame*)s2->next_picture_ptr;
3094 s2->next_picture_ptr= NULL;
3096 *data_size = sizeof(AVFrame);
3101 if(s2->flags&CODEC_FLAG_TRUNCATED){
3102 int next= mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
3104 if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 )
3109 buf_end = buf + buf_size;
3112 if (s->repeat_field % 2 == 1) {
3114 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
3115 // s2->picture_number, s->repeat_field);
3116 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
3117 *data_size = sizeof(AVPicture);
3123 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
3124 vcr2_init_sequence(avctx);
3129 /* find start next code */
3131 buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
3132 if (start_code > 0x1ff){
3133 if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
3134 if(avctx->thread_count > 1){
3137 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
3138 for(i=0; i<s->slice_count; i++)
3139 s2->error_count += s2->thread_context[i]->error_count;
3141 if (slice_end(avctx, picture)) {
3142 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
3143 *data_size = sizeof(AVPicture);
3146 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
3149 input_size = buf_end - buf_ptr;
3151 if(avctx->debug & FF_DEBUG_STARTCODE){
3152 av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
3155 /* prepare data for next start code */
3156 switch(start_code) {
3157 case SEQ_START_CODE:
3158 mpeg1_decode_sequence(avctx, buf_ptr,
3162 case PICTURE_START_CODE:
3163 /* we have a complete image : we try to decompress it */
3164 mpeg1_decode_picture(avctx,
3165 buf_ptr, input_size);
3167 case EXT_START_CODE:
3168 mpeg_decode_extension(avctx,
3169 buf_ptr, input_size);
3171 case USER_START_CODE:
3172 mpeg_decode_user_data(avctx,
3173 buf_ptr, input_size);
3175 case GOP_START_CODE:
3177 mpeg_decode_gop(avctx,
3178 buf_ptr, input_size);
3181 if (start_code >= SLICE_MIN_START_CODE &&
3182 start_code <= SLICE_MAX_START_CODE) {
3183 int mb_y= start_code - SLICE_MIN_START_CODE;
3185 if(s2->last_picture_ptr==NULL){
3186 /* skip b frames if we dont have reference frames */
3187 if(s2->pict_type==B_TYPE) break;
3188 /* skip P frames if we dont have reference frame no valid header */
3189 // if(s2->pict_type==P_TYPE && s2->first_field && !s2->first_slice) break;
3191 /* skip b frames if we are in a hurry */
3192 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
3193 if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
3194 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
3195 || avctx->skip_frame >= AVDISCARD_ALL)
3197 /* skip everything if we are in a hurry>=5 */
3198 if(avctx->hurry_up>=5) break;
3200 if (!s->mpeg_enc_ctx_allocated) break;
3202 if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
3203 if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
3207 if(s2->first_slice){
3209 if(mpeg_field_start(s2) < 0)
3212 if(!s2->current_picture_ptr){
3213 av_log(avctx, AV_LOG_ERROR, "current_picture not initalized\n");
3217 if(avctx->thread_count > 1){
3218 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
3219 if(threshold <= mb_y){
3220 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
3222 thread_context->start_mb_y= mb_y;
3223 thread_context->end_mb_y = s2->mb_height;
3225 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
3226 ff_update_duplicate_context(thread_context, s2);
3228 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
3231 buf_ptr += 2; //FIXME add minimum num of bytes per slice
3233 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
3237 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
3238 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);
3240 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);
3249 static int mpeg_decode_end(AVCodecContext *avctx)
3251 Mpeg1Context *s = avctx->priv_data;
3253 if (s->mpeg_enc_ctx_allocated)
3254 MPV_common_end(&s->mpeg_enc_ctx);
3258 AVCodec mpeg1video_decoder = {
3261 CODEC_ID_MPEG1VIDEO,
3262 sizeof(Mpeg1Context),
3267 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3268 .flush= ff_mpeg_flush,
3271 AVCodec mpeg2video_decoder = {
3274 CODEC_ID_MPEG2VIDEO,
3275 sizeof(Mpeg1Context),
3280 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3281 .flush= ff_mpeg_flush,
3285 AVCodec mpegvideo_decoder = {
3288 CODEC_ID_MPEG2VIDEO,
3289 sizeof(Mpeg1Context),
3294 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3295 .flush= ff_mpeg_flush,
3298 #ifdef CONFIG_ENCODERS
3300 AVCodec mpeg1video_encoder = {
3303 CODEC_ID_MPEG1VIDEO,
3304 sizeof(MpegEncContext),
3308 .supported_framerates= ff_frame_rate_tab+1,
3309 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
3310 .capabilities= CODEC_CAP_DELAY,
3313 AVCodec mpeg2video_encoder = {
3316 CODEC_ID_MPEG2VIDEO,
3317 sizeof(MpegEncContext),
3321 .supported_framerates= ff_frame_rate_tab+1,
3322 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
3323 .capabilities= CODEC_CAP_DELAY,
3328 static int mpeg_mc_decode_init(AVCodecContext *avctx){
3331 if( avctx->thread_count > 1)
3333 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
3335 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
3336 dprintf(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
3338 mpeg_decode_init(avctx);
3339 s = avctx->priv_data;
3341 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
3342 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
3347 AVCodec mpeg_xvmc_decoder = {
3350 CODEC_ID_MPEG2VIDEO_XVMC,
3351 sizeof(Mpeg1Context),
3352 mpeg_mc_decode_init,
3356 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
3357 .flush= ff_mpeg_flush,
3362 #ifdef CONFIG_MPEGVIDEO_PARSER
3363 static void mpegvideo_extract_headers(AVCodecParserContext *s,
3364 AVCodecContext *avctx,
3365 const uint8_t *buf, int buf_size)
3367 ParseContext1 *pc = s->priv_data;
3368 const uint8_t *buf_end;
3369 uint32_t start_code;
3370 int frame_rate_index, ext_type, bytes_left;
3371 int frame_rate_ext_n, frame_rate_ext_d;
3372 int picture_structure, top_field_first, repeat_first_field, progressive_frame;
3373 int horiz_size_ext, vert_size_ext, bit_rate_ext;
3374 //FIXME replace the crap with get_bits()
3376 buf_end = buf + buf_size;
3377 while (buf < buf_end) {
3379 buf= ff_find_start_code(buf, buf_end, &start_code);
3380 bytes_left = buf_end - buf;
3381 switch(start_code) {
3382 case PICTURE_START_CODE:
3383 if (bytes_left >= 2) {
3384 s->pict_type = (buf[1] >> 3) & 7;
3387 case SEQ_START_CODE:
3388 if (bytes_left >= 7) {
3389 pc->width = (buf[0] << 4) | (buf[1] >> 4);
3390 pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
3391 avcodec_set_dimensions(avctx, pc->width, pc->height);
3392 frame_rate_index = buf[3] & 0xf;
3393 pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
3394 pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
3395 avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
3396 avctx->codec_id = CODEC_ID_MPEG1VIDEO;
3400 case EXT_START_CODE:
3401 if (bytes_left >= 1) {
3402 ext_type = (buf[0] >> 4);
3404 case 0x1: /* sequence extension */
3405 if (bytes_left >= 6) {
3406 horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
3407 vert_size_ext = (buf[2] >> 5) & 3;
3408 bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
3409 frame_rate_ext_n = (buf[5] >> 5) & 3;
3410 frame_rate_ext_d = (buf[5] & 0x1f);
3411 pc->progressive_sequence = buf[1] & (1 << 3);
3412 avctx->has_b_frames= !(buf[5] >> 7);
3414 pc->width |=(horiz_size_ext << 12);
3415 pc->height |=( vert_size_ext << 12);
3416 avctx->bit_rate += (bit_rate_ext << 18) * 400;
3417 avcodec_set_dimensions(avctx, pc->width, pc->height);
3418 avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
3419 avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
3420 avctx->codec_id = CODEC_ID_MPEG2VIDEO;
3421 avctx->sub_id = 2; /* forces MPEG2 */
3424 case 0x8: /* picture coding extension */
3425 if (bytes_left >= 5) {
3426 picture_structure = buf[2]&3;
3427 top_field_first = buf[3] & (1 << 7);
3428 repeat_first_field = buf[3] & (1 << 1);
3429 progressive_frame = buf[4] & (1 << 7);
3431 /* check if we must repeat the frame */
3432 if (repeat_first_field) {
3433 if (pc->progressive_sequence) {
3434 if (top_field_first)
3438 } else if (progressive_frame) {
3443 /* the packet only represents half a frame
3444 XXX,FIXME maybe find a different solution */
3445 if(picture_structure != 3)
3446 s->repeat_pict = -1;
3455 /* we stop parsing when we encounter a slice. It ensures
3456 that this function takes a negligible amount of time */
3457 if (start_code >= SLICE_MIN_START_CODE &&
3458 start_code <= SLICE_MAX_START_CODE)
3466 static int mpegvideo_parse(AVCodecParserContext *s,
3467 AVCodecContext *avctx,
3468 uint8_t **poutbuf, int *poutbuf_size,
3469 const uint8_t *buf, int buf_size)
3471 ParseContext1 *pc1 = s->priv_data;
3472 ParseContext *pc= &pc1->pc;
3475 if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
3478 next= mpeg1_find_frame_end(pc, buf, buf_size);
3480 if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
3487 /* we have a full frame : we just parse the first few MPEG headers
3488 to have the full timing information. The time take by this
3489 function should be negligible for uncorrupted streams */
3490 mpegvideo_extract_headers(s, avctx, buf, buf_size);
3492 printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
3493 s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
3496 *poutbuf = (uint8_t *)buf;
3497 *poutbuf_size = buf_size;
3501 static int mpegvideo_split(AVCodecContext *avctx,
3502 const uint8_t *buf, int buf_size)
3507 for(i=0; i<buf_size; i++){
3508 state= (state<<8) | buf[i];
3509 if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
3515 AVCodecParser mpegvideo_parser = {
3516 { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
3517 sizeof(ParseContext1),
3523 #endif /* !CONFIG_MPEGVIDEO_PARSER */
3525 static int imx_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
3526 uint8_t **poutbuf, int *poutbuf_size,
3527 const uint8_t *buf, int buf_size, int keyframe)
3529 /* MXF essence element key */
3530 static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 };
3533 if (avctx->codec_id != CODEC_ID_MPEG2VIDEO) {
3534 av_log(avctx, AV_LOG_ERROR, "imx bitstream filter only applies to mpeg2video codec\n");
3538 *poutbuf = av_malloc(buf_size + 20 + FF_INPUT_BUFFER_PADDING_SIZE);
3539 poutbufp = *poutbuf;
3540 bytestream_put_buffer(&poutbufp, imx_header, 16);
3541 bytestream_put_byte(&poutbufp, 0x83); /* KLV BER long form */
3542 bytestream_put_be24(&poutbufp, buf_size);
3543 bytestream_put_buffer(&poutbufp, buf, buf_size);
3544 *poutbuf_size = poutbufp - *poutbuf;
3548 AVBitStreamFilter imx_dump_header_bsf = {
3554 /* this is ugly i know, but the alternative is too make
3555 hundreds of vars global and prefix them with ff_mpeg1_
3556 which is far uglier. */