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"
42 #define MBINCR_VLC_BITS 9
43 #define MB_PAT_VLC_BITS 9
44 #define MB_PTYPE_VLC_BITS 6
45 #define MB_BTYPE_VLC_BITS 6
46 #define TEX_VLC_BITS 9
48 #ifdef CONFIG_ENCODERS
49 static void mpeg1_encode_block(MpegEncContext *s,
52 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
53 #endif //CONFIG_ENCODERS
54 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
57 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
60 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n);
61 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
64 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
67 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
68 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
69 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
70 static void exchange_uv(MpegEncContext *s);
73 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
74 extern int XVMC_field_end(MpegEncContext *s);
75 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
76 extern void XVMC_init_block(MpegEncContext *s);//set s->block
79 static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
80 static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
81 static const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
82 static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
83 PIX_FMT_XVMC_MPEG2_IDCT,
84 PIX_FMT_XVMC_MPEG2_MC,
86 #ifdef CONFIG_ENCODERS
87 static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
88 static uint8_t fcode_tab[MAX_MV*2+1];
90 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
91 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
93 /* simple include everything table for dc, first byte is bits number next 3 are code*/
94 static uint32_t mpeg1_lum_dc_uni[512];
95 static uint32_t mpeg1_chr_dc_uni[512];
97 static uint8_t mpeg1_index_run[2][64];
98 static int8_t mpeg1_max_level[2][64];
99 #endif //CONFIG_ENCODERS
101 static uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
103 static void init_2d_vlc_rl(RLTable *rl, int use_static)
107 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
108 &rl->table_vlc[0][1], 4, 2,
109 &rl->table_vlc[0][0], 4, 2, use_static);
112 rl->rl_vlc[0]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
114 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
116 for(i=0; i<rl->vlc.table_size; i++){
117 int code= rl->vlc.table[i][0];
118 int len = rl->vlc.table[i][1];
121 if(len==0){ // illegal code
124 }else if(len<0){ //more bits needed
128 if(code==rl->n){ //esc
131 }else if(code==rl->n+1){ //eob
135 run= rl->table_run [code] + 1;
136 level= rl->table_level[code];
139 rl->rl_vlc[0][i].len= len;
140 rl->rl_vlc[0][i].level= level;
141 rl->rl_vlc[0][i].run= run;
145 #ifdef CONFIG_ENCODERS
146 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
149 for(i=0; i<128; i++){
152 for(run=0; run<64; run++){
155 int alevel= FFABS(level);
156 int sign= (level>>31)&1;
158 if (alevel > rl->max_level[0][run])
161 code= rl->index_run[0][run] + alevel - 1;
163 if (code < 111 /* rl->n */) {
164 /* store the vlc & sign at once */
165 len= rl->table_vlc[code][1]+1;
166 bits= (rl->table_vlc[code][0]<<1) + sign;
168 len= rl->table_vlc[111/*rl->n*/][1]+6;
169 bits= rl->table_vlc[111/*rl->n*/][0]<<6;
179 bits|= 0x8001 + level + 255;
181 bits|= level & 0xffff;
186 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
192 static int find_frame_rate_index(MpegEncContext *s){
194 int64_t dmin= INT64_MAX;
198 int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
199 int64_t n1= 1001LL*s->avctx->time_base.den;
200 if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
205 s->frame_rate_index= i;
214 static int encode_init(AVCodecContext *avctx)
216 MpegEncContext *s = avctx->priv_data;
218 if(MPV_encode_init(avctx) < 0)
221 if(find_frame_rate_index(s) < 0){
222 if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
223 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
226 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);
230 if(avctx->profile == FF_PROFILE_UNKNOWN){
231 if(avctx->level != FF_LEVEL_UNKNOWN){
232 av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
235 avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
238 if(avctx->level == FF_LEVEL_UNKNOWN){
239 if(avctx->profile == 0){ /* 4:2:2 */
240 if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
241 else avctx->level = 2; /* High */
243 if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
244 av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
247 if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
248 else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
249 else avctx->level = 4; /* High */
253 if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
254 av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
261 static void put_header(MpegEncContext *s, int header)
263 align_put_bits(&s->pb);
264 put_bits(&s->pb, 16, header>>16);
265 put_bits(&s->pb, 16, header&0xFFFF);
268 /* put sequence header if needed */
269 static void mpeg1_encode_sequence_header(MpegEncContext *s)
271 unsigned int vbv_buffer_size;
275 float best_aspect_error= 1E10;
276 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
277 int constraint_parameter_flag;
279 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
281 if (s->current_picture.key_frame) {
282 AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
284 /* mpeg1 header repeated every gop */
285 put_header(s, SEQ_START_CODE);
287 put_bits(&s->pb, 12, s->width);
288 put_bits(&s->pb, 12, s->height);
291 float error= aspect_ratio;
292 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
293 error-= 1.0/mpeg1_aspect[i];
295 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
299 if(error < best_aspect_error){
300 best_aspect_error= error;
301 s->aspect_ratio_info= i;
305 put_bits(&s->pb, 4, s->aspect_ratio_info);
306 put_bits(&s->pb, 4, s->frame_rate_index);
308 if(s->avctx->rc_max_rate){
309 v = (s->avctx->rc_max_rate + 399) / 400;
310 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
316 if(s->avctx->rc_buffer_size)
317 vbv_buffer_size = s->avctx->rc_buffer_size;
319 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
320 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
321 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
323 put_bits(&s->pb, 18, v & 0x3FFFF);
324 put_bits(&s->pb, 1, 1); /* marker */
325 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
327 constraint_parameter_flag=
328 s->width <= 768 && s->height <= 576 &&
329 s->mb_width * s->mb_height <= 396 &&
330 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
331 framerate.num <= framerate.den*30 &&
332 s->avctx->me_range && s->avctx->me_range < 128 &&
333 vbv_buffer_size <= 20 &&
335 s->codec_id == CODEC_ID_MPEG1VIDEO;
337 put_bits(&s->pb, 1, constraint_parameter_flag);
339 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
340 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
342 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
343 put_header(s, EXT_START_CODE);
344 put_bits(&s->pb, 4, 1); //seq ext
346 put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
348 put_bits(&s->pb, 3, s->avctx->profile); //profile
349 put_bits(&s->pb, 4, s->avctx->level); //level
351 put_bits(&s->pb, 1, s->progressive_sequence);
352 put_bits(&s->pb, 2, s->chroma_format);
353 put_bits(&s->pb, 2, 0); //horizontal size ext
354 put_bits(&s->pb, 2, 0); //vertical size ext
355 put_bits(&s->pb, 12, v>>18); //bitrate ext
356 put_bits(&s->pb, 1, 1); //marker
357 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
358 put_bits(&s->pb, 1, s->low_delay);
359 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
360 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
363 put_header(s, GOP_START_CODE);
364 put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
365 /* time code : we must convert from the real frame rate to a
366 fake mpeg frame rate in case of low frame rate */
367 fps = (framerate.num + framerate.den/2)/ framerate.den;
368 time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
370 s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
371 if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
372 /* only works for NTSC 29.97 */
373 int d = time_code / 17982;
374 int m = time_code % 17982;
375 //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
376 time_code += 18 * d + 2 * ((m - 2) / 1798);
378 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
379 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
380 put_bits(&s->pb, 1, 1);
381 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
382 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
383 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
384 put_bits(&s->pb, 1, 0); /* broken link */
388 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
390 put_bits(&s->pb, 11, 0x008);
393 put_bits(&s->pb, mbAddrIncrTable[run][1],
394 mbAddrIncrTable[run][0]);
396 #endif //CONFIG_ENCODERS
398 static void common_init(MpegEncContext *s)
402 s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision];
406 void ff_mpeg1_clean_buffers(MpegEncContext *s){
407 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
408 s->last_dc[1] = s->last_dc[0];
409 s->last_dc[2] = s->last_dc[0];
410 memset(s->last_mv, 0, sizeof(s->last_mv));
413 #ifdef CONFIG_ENCODERS
415 static av_always_inline void put_qscale(MpegEncContext *s)
418 assert(s->qscale>=1 && s->qscale <=12);
419 put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
421 put_bits(&s->pb, 5, s->qscale);
425 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
426 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
428 put_bits(&s->pb, 1, 0); /* slice extra information */
431 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
433 mpeg1_encode_sequence_header(s);
435 /* mpeg1 picture header */
436 put_header(s, PICTURE_START_CODE);
437 /* temporal reference */
439 // RAL: s->picture_number instead of s->fake_picture_number
440 put_bits(&s->pb, 10, (s->picture_number -
441 s->gop_picture_number) & 0x3ff);
442 put_bits(&s->pb, 3, s->pict_type);
444 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
445 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
447 // RAL: Forward f_code also needed for B frames
448 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
449 put_bits(&s->pb, 1, 0); /* half pel coordinates */
450 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
451 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
453 put_bits(&s->pb, 3, 7); /* forward_f_code */
456 // RAL: Backward f_code necessary for B frames
457 if (s->pict_type == B_TYPE) {
458 put_bits(&s->pb, 1, 0); /* half pel coordinates */
459 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
460 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
462 put_bits(&s->pb, 3, 7); /* backward_f_code */
465 put_bits(&s->pb, 1, 0); /* extra bit picture */
467 s->frame_pred_frame_dct = 1;
468 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
469 put_header(s, EXT_START_CODE);
470 put_bits(&s->pb, 4, 8); //pic ext
471 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
472 put_bits(&s->pb, 4, s->f_code);
473 put_bits(&s->pb, 4, s->f_code);
475 put_bits(&s->pb, 8, 255);
477 if (s->pict_type == B_TYPE) {
478 put_bits(&s->pb, 4, s->b_code);
479 put_bits(&s->pb, 4, s->b_code);
481 put_bits(&s->pb, 8, 255);
483 put_bits(&s->pb, 2, s->intra_dc_precision);
485 assert(s->picture_structure == PICT_FRAME);
486 put_bits(&s->pb, 2, s->picture_structure);
487 if (s->progressive_sequence) {
488 put_bits(&s->pb, 1, 0); /* no repeat */
490 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
492 /* XXX: optimize the generation of this flag with entropy
494 s->frame_pred_frame_dct = s->progressive_sequence;
496 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
497 put_bits(&s->pb, 1, s->concealment_motion_vectors);
498 put_bits(&s->pb, 1, s->q_scale_type);
499 put_bits(&s->pb, 1, s->intra_vlc_format);
500 put_bits(&s->pb, 1, s->alternate_scan);
501 put_bits(&s->pb, 1, s->repeat_first_field);
502 s->progressive_frame = s->progressive_sequence;
503 put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
504 put_bits(&s->pb, 1, s->progressive_frame);
505 put_bits(&s->pb, 1, 0); //composite_display_flag
507 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
510 put_header(s, USER_START_CODE);
511 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
512 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
517 ff_mpeg1_encode_slice_header(s);
520 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
521 int has_mv, int field_motion)
523 put_bits(&s->pb, n, bits);
524 if (!s->frame_pred_frame_dct) {
526 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
527 put_bits(&s->pb, 1, s->interlaced_dct);
531 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
532 DCTELEM block[6][64],
533 int motion_x, int motion_y,
537 const int mb_x = s->mb_x;
538 const int mb_y = s->mb_y;
539 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
543 for(i=0;i<mb_block_count;i++) {
544 if (s->block_last_index[i] >= 0)
545 cbp |= 1 << (mb_block_count - 1 - i);
548 if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
549 (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
550 ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
551 (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) |
552 ((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))) {
554 s->qscale -= s->dquant;
558 if(s->pict_type == P_TYPE){
559 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
560 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
564 assert(s->mb_skip_run == 0);
565 encode_mb_skip_run(s, s->mb_x);
567 encode_mb_skip_run(s, s->mb_skip_run);
570 if (s->pict_type == I_TYPE) {
571 if(s->dquant && cbp){
572 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
575 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
576 s->qscale -= s->dquant;
578 s->misc_bits+= get_bits_diff(s);
580 } else if (s->mb_intra) {
581 if(s->dquant && cbp){
582 put_mb_modes(s, 6, 0x01, 0, 0);
585 put_mb_modes(s, 5, 0x03, 0, 0);
586 s->qscale -= s->dquant;
588 s->misc_bits+= get_bits_diff(s);
590 memset(s->last_mv, 0, sizeof(s->last_mv));
591 } else if (s->pict_type == P_TYPE) {
592 if(s->mv_type == MV_TYPE_16X16){
594 if ((motion_x|motion_y) == 0) {
596 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
599 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
601 s->misc_bits+= get_bits_diff(s);
604 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
607 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
609 s->misc_bits+= get_bits_diff(s);
610 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
611 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
612 s->mv_bits+= get_bits_diff(s);
615 put_bits(&s->pb, 3, 1); /* motion only */
616 if (!s->frame_pred_frame_dct)
617 put_bits(&s->pb, 2, 2); /* motion_type: frame */
618 s->misc_bits+= get_bits_diff(s);
619 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
620 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
621 s->qscale -= s->dquant;
622 s->mv_bits+= get_bits_diff(s);
624 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
625 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
627 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
631 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
634 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
637 put_bits(&s->pb, 3, 1); /* motion only */
638 put_bits(&s->pb, 2, 1); /* motion_type: field */
639 s->qscale -= s->dquant;
641 s->misc_bits+= get_bits_diff(s);
643 put_bits(&s->pb, 1, s->field_select[0][i]);
644 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
645 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
646 s->last_mv[0][i][0]= s->mv[0][i][0];
647 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
649 s->mv_bits+= get_bits_diff(s);
652 if (s->chroma_y_shift) {
653 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
655 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
656 put_bits(&s->pb, 2, cbp & 3);
661 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
663 if(s->mv_type == MV_TYPE_16X16){
664 if (cbp){ // With coded bloc pattern
666 if(s->mv_dir == MV_DIR_FORWARD)
667 put_mb_modes(s, 6, 3, 1, 0);
669 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
672 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
674 }else{ // No coded bloc pattern
675 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
676 if (!s->frame_pred_frame_dct)
677 put_bits(&s->pb, 2, 2); /* motion_type: frame */
678 s->qscale -= s->dquant;
680 s->misc_bits += get_bits_diff(s);
681 if (s->mv_dir&MV_DIR_FORWARD){
682 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
683 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
684 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
685 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
688 if (s->mv_dir&MV_DIR_BACKWARD){
689 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
690 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
691 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
692 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
696 assert(s->mv_type == MV_TYPE_FIELD);
697 assert(!s->frame_pred_frame_dct);
698 if (cbp){ // With coded bloc pattern
700 if(s->mv_dir == MV_DIR_FORWARD)
701 put_mb_modes(s, 6, 3, 1, 1);
703 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
706 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
708 }else{ // No coded bloc pattern
709 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
710 put_bits(&s->pb, 2, 1); /* motion_type: field */
711 s->qscale -= s->dquant;
713 s->misc_bits += get_bits_diff(s);
714 if (s->mv_dir&MV_DIR_FORWARD){
716 put_bits(&s->pb, 1, s->field_select[0][i]);
717 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
718 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
719 s->last_mv[0][i][0]= s->mv[0][i][0];
720 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
724 if (s->mv_dir&MV_DIR_BACKWARD){
726 put_bits(&s->pb, 1, s->field_select[1][i]);
727 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
728 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
729 s->last_mv[1][i][0]= s->mv[1][i][0];
730 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
735 s->mv_bits += get_bits_diff(s);
737 if (s->chroma_y_shift) {
738 put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
740 put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
741 put_bits(&s->pb, 2, cbp & 3);
745 for(i=0;i<mb_block_count;i++) {
746 if (cbp & (1 << (mb_block_count - 1 - i))) {
747 mpeg1_encode_block(s, block[i], i);
752 s->i_tex_bits+= get_bits_diff(s);
754 s->p_tex_bits+= get_bits_diff(s);
758 void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
760 if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
761 else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
764 // RAL: Parameter added: f_or_b_code
765 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
767 int code, bit_size, l, bits, range, sign;
773 mbMotionVectorTable[0][1],
774 mbMotionVectorTable[0][0]);
776 bit_size = f_or_b_code - 1;
777 range = 1 << bit_size;
778 /* modulo encoding */
779 l= INT_BIT - 5 - bit_size;
784 code = (val >> bit_size) + 1;
785 bits = val & (range - 1);
790 code = (val >> bit_size) + 1;
791 bits = val & (range - 1);
795 assert(code > 0 && code <= 16);
798 mbMotionVectorTable[code][1],
799 mbMotionVectorTable[code][0]);
801 put_bits(&s->pb, 1, sign);
803 put_bits(&s->pb, bit_size, bits);
808 void ff_mpeg1_encode_init(MpegEncContext *s)
820 init_rl(&rl_mpeg1, static_rl_table_store[0]);
821 init_rl(&rl_mpeg2, static_rl_table_store[1]);
825 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
826 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
829 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len);
830 if(s->intra_vlc_format)
831 init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
833 /* build unified dc encoding tables */
834 for(i=-255; i<256; i++)
842 index = av_log2(2*adiff);
844 bits= vlc_dc_lum_bits[index] + index;
845 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
846 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
848 bits= vlc_dc_chroma_bits[index] + index;
849 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
850 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
853 for(f_code=1; f_code<=MAX_FCODE; f_code++){
854 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
857 if(mv==0) len= mbMotionVectorTable[0][1];
859 int val, bit_size, range, code;
861 bit_size = f_code - 1;
862 range = 1 << bit_size;
868 code = (val >> bit_size) + 1;
870 len= mbMotionVectorTable[code][1] + 1 + bit_size;
872 len= mbMotionVectorTable[16][1] + 2 + bit_size;
876 mv_penalty[f_code][mv+MAX_MV]= len;
881 for(f_code=MAX_FCODE; f_code>0; f_code--){
882 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
883 fcode_tab[mv+MAX_MV]= f_code;
887 s->me.mv_penalty= mv_penalty;
888 s->fcode_tab= fcode_tab;
889 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
896 if (s->intra_vlc_format) {
897 s->intra_ac_vlc_length=
898 s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
900 s->intra_ac_vlc_length=
901 s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
903 s->inter_ac_vlc_length=
904 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
907 static inline void encode_dc(MpegEncContext *s, int diff, int component)
909 if(((unsigned) (diff+255)) >= 511){
913 index= av_log2_16bit(-2*diff);
916 index= av_log2_16bit(2*diff);
918 if (component == 0) {
921 vlc_dc_lum_bits[index] + index,
922 (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
926 vlc_dc_chroma_bits[index] + index,
927 (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
930 if (component == 0) {
933 mpeg1_lum_dc_uni[diff+255]&0xFF,
934 mpeg1_lum_dc_uni[diff+255]>>8);
938 mpeg1_chr_dc_uni[diff+255]&0xFF,
939 mpeg1_chr_dc_uni[diff+255]>>8);
944 static void mpeg1_encode_block(MpegEncContext *s,
948 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
950 const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
952 last_index = s->block_last_index[n];
956 component = (n <= 3 ? 0 : (n&1) + 1);
957 dc = block[0]; /* overflow is impossible */
958 diff = dc - s->last_dc[component];
959 encode_dc(s, diff, component);
960 s->last_dc[component] = dc;
962 if (s->intra_vlc_format)
963 table_vlc = rl_mpeg2.table_vlc;
965 /* encode the first coefficient : needs to be done here because
966 it is handled slightly differently */
968 if (abs(level) == 1) {
969 code = ((uint32_t)level >> 31); /* the sign bit */
970 put_bits(&s->pb, 2, code | 0x02);
979 /* now quantify & encode AC coefs */
980 last_non_zero = i - 1;
982 for(;i<=last_index;i++) {
983 j = s->intra_scantable.permutated[i];
988 dprintf(s->avctx, "level[%d]=%d\n", i, level);
990 /* encode using VLC */
992 run = i - last_non_zero - 1;
995 MASK_ABS(sign, alevel)
998 if (alevel <= mpeg1_max_level[0][run]){
999 code= mpeg1_index_run[0][run] + alevel - 1;
1000 /* store the vlc & sign at once */
1001 put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
1003 /* escape seems to be pretty rare <5% so i dont optimize it */
1004 put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
1005 /* escape: only clip in this case */
1006 put_bits(&s->pb, 6, run);
1007 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
1009 put_bits(&s->pb, 8, level & 0xff);
1012 put_bits(&s->pb, 16, 0x8001 + level + 255);
1014 put_bits(&s->pb, 16, level & 0xffff);
1018 put_bits(&s->pb, 12, level & 0xfff);
1025 put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
1027 #endif //CONFIG_ENCODERS
1029 /******************************************/
1032 static VLC dc_lum_vlc;
1033 static VLC dc_chroma_vlc;
1035 static VLC mbincr_vlc;
1036 static VLC mb_ptype_vlc;
1037 static VLC mb_btype_vlc;
1038 static VLC mb_pat_vlc;
1040 static void init_vlcs(void)
1042 static int done = 0;
1047 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
1048 vlc_dc_lum_bits, 1, 1,
1049 vlc_dc_lum_code, 2, 2, 1);
1050 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
1051 vlc_dc_chroma_bits, 1, 1,
1052 vlc_dc_chroma_code, 2, 2, 1);
1053 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
1054 &mbMotionVectorTable[0][1], 2, 1,
1055 &mbMotionVectorTable[0][0], 2, 1, 1);
1056 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
1057 &mbAddrIncrTable[0][1], 2, 1,
1058 &mbAddrIncrTable[0][0], 2, 1, 1);
1059 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
1060 &mbPatTable[0][1], 2, 1,
1061 &mbPatTable[0][0], 2, 1, 1);
1063 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
1064 &table_mb_ptype[0][1], 2, 1,
1065 &table_mb_ptype[0][0], 2, 1, 1);
1066 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
1067 &table_mb_btype[0][1], 2, 1,
1068 &table_mb_btype[0][0], 2, 1, 1);
1069 init_rl(&rl_mpeg1, static_rl_table_store[0]);
1070 init_rl(&rl_mpeg2, static_rl_table_store[1]);
1072 init_2d_vlc_rl(&rl_mpeg1, 1);
1073 init_2d_vlc_rl(&rl_mpeg2, 1);
1077 static inline int get_dmv(MpegEncContext *s)
1079 if(get_bits1(&s->gb))
1080 return 1 - (get_bits1(&s->gb) << 1);
1085 static inline int get_qscale(MpegEncContext *s)
1087 int qscale = get_bits(&s->gb, 5);
1088 if (s->q_scale_type) {
1089 return non_linear_qscale[qscale];
1095 /* motion type (for mpeg2) */
1101 static int mpeg_decode_mb(MpegEncContext *s,
1102 DCTELEM block[12][64])
1104 int i, j, k, cbp, val, mb_type, motion_type;
1105 const int mb_block_count = 4 + (1<< s->chroma_format);
1107 dprintf(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1109 assert(s->mb_skipped==0);
1111 if (s->mb_skip_run-- != 0) {
1112 if(s->pict_type == I_TYPE){
1113 av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1120 s->block_last_index[i] = -1;
1121 if(s->picture_structure == PICT_FRAME)
1122 s->mv_type = MV_TYPE_16X16;
1124 s->mv_type = MV_TYPE_FIELD;
1125 if (s->pict_type == P_TYPE) {
1126 /* if P type, zero motion vector is implied */
1127 s->mv_dir = MV_DIR_FORWARD;
1128 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1129 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1130 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1131 s->field_select[0][0]= s->picture_structure - 1;
1133 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1138 mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1];
1140 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,
1141 if(IS_INTRA(mb_type))
1144 /* if B type, reuse previous vectors and directions */
1145 s->mv[0][0][0] = s->last_mv[0][0][0];
1146 s->mv[0][0][1] = s->last_mv[0][0][1];
1147 s->mv[1][0][0] = s->last_mv[1][0][0];
1148 s->mv[1][0][1] = s->last_mv[1][0][1];
1150 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1151 mb_type | MB_TYPE_SKIP;
1152 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1154 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1161 switch(s->pict_type) {
1164 if (get_bits1(&s->gb) == 0) {
1165 if (get_bits1(&s->gb) == 0){
1166 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1169 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1171 mb_type = MB_TYPE_INTRA;
1175 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1177 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1180 mb_type = ptype2mb_type[ mb_type ];
1183 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1185 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1188 mb_type = btype2mb_type[ mb_type ];
1191 dprintf(s->avctx, "mb_type=%x\n", mb_type);
1192 // motion_type = 0; /* avoid warning */
1193 if (IS_INTRA(mb_type)) {
1194 s->dsp.clear_blocks(s->block[0]);
1196 if(!s->chroma_y_shift){
1197 s->dsp.clear_blocks(s->block[6]);
1200 /* compute dct type */
1201 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1202 !s->frame_pred_frame_dct) {
1203 s->interlaced_dct = get_bits1(&s->gb);
1206 if (IS_QUANT(mb_type))
1207 s->qscale = get_qscale(s);
1209 if (s->concealment_motion_vectors) {
1210 /* just parse them */
1211 if (s->picture_structure != PICT_FRAME)
1212 skip_bits1(&s->gb); /* field select */
1214 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1215 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1216 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1217 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1219 skip_bits1(&s->gb); /* marker */
1221 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1224 //one 1 we memcpy blocks in xvmcvideo
1225 if(s->avctx->xvmc_acceleration > 1){
1226 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1233 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1234 if(s->flags2 & CODEC_FLAG2_FAST){
1236 mpeg2_fast_decode_block_intra(s, s->pblocks[i], i);
1239 for(i=0;i<mb_block_count;i++) {
1240 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1246 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1251 if (mb_type & MB_TYPE_ZERO_MV){
1252 assert(mb_type & MB_TYPE_CBP);
1254 /* compute dct type */
1255 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1256 !s->frame_pred_frame_dct) {
1257 s->interlaced_dct = get_bits1(&s->gb);
1260 if (IS_QUANT(mb_type))
1261 s->qscale = get_qscale(s);
1263 s->mv_dir = MV_DIR_FORWARD;
1264 if(s->picture_structure == PICT_FRAME)
1265 s->mv_type = MV_TYPE_16X16;
1267 s->mv_type = MV_TYPE_FIELD;
1268 mb_type |= MB_TYPE_INTERLACED;
1269 s->field_select[0][0]= s->picture_structure - 1;
1271 s->last_mv[0][0][0] = 0;
1272 s->last_mv[0][0][1] = 0;
1273 s->last_mv[0][1][0] = 0;
1274 s->last_mv[0][1][1] = 0;
1278 assert(mb_type & MB_TYPE_L0L1);
1279 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1280 /* get additional motion vector type */
1281 if (s->frame_pred_frame_dct)
1282 motion_type = MT_FRAME;
1284 motion_type = get_bits(&s->gb, 2);
1287 /* compute dct type */
1288 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1289 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1290 s->interlaced_dct = get_bits1(&s->gb);
1293 if (IS_QUANT(mb_type))
1294 s->qscale = get_qscale(s);
1296 /* motion vectors */
1299 if (USES_LIST(mb_type, i)) {
1300 s->mv_dir |= (MV_DIR_FORWARD >> i);
1301 dprintf(s->avctx, "motion_type=%d\n", motion_type);
1302 switch(motion_type) {
1303 case MT_FRAME: /* or MT_16X8 */
1304 if (s->picture_structure == PICT_FRAME) {
1306 mb_type |= MB_TYPE_16x16;
1307 s->mv_type = MV_TYPE_16X16;
1308 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1309 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1310 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1311 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1312 /* full_pel: only for mpeg1 */
1313 if (s->full_pel[i]){
1314 s->mv[i][0][0] <<= 1;
1315 s->mv[i][0][1] <<= 1;
1319 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1320 s->mv_type = MV_TYPE_16X8;
1322 s->field_select[i][j] = get_bits1(&s->gb);
1324 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1325 s->last_mv[i][j][k]);
1326 s->last_mv[i][j][k] = val;
1327 s->mv[i][j][k] = val;
1333 s->mv_type = MV_TYPE_FIELD;
1334 if (s->picture_structure == PICT_FRAME) {
1335 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1337 s->field_select[i][j] = get_bits1(&s->gb);
1338 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1339 s->last_mv[i][j][0]);
1340 s->last_mv[i][j][0] = val;
1341 s->mv[i][j][0] = val;
1342 dprintf(s->avctx, "fmx=%d\n", val);
1343 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1344 s->last_mv[i][j][1] >> 1);
1345 s->last_mv[i][j][1] = val << 1;
1346 s->mv[i][j][1] = val;
1347 dprintf(s->avctx, "fmy=%d\n", val);
1350 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1351 s->field_select[i][0] = get_bits1(&s->gb);
1353 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1354 s->last_mv[i][0][k]);
1355 s->last_mv[i][0][k] = val;
1356 s->last_mv[i][1][k] = val;
1357 s->mv[i][0][k] = val;
1363 int dmx, dmy, mx, my, m;
1365 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1366 s->last_mv[i][0][0]);
1367 s->last_mv[i][0][0] = mx;
1368 s->last_mv[i][1][0] = mx;
1370 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1371 s->last_mv[i][0][1] >> 1);
1373 s->mv_type = MV_TYPE_DMV;
1376 s->last_mv[i][0][1] = my<<1;
1377 s->last_mv[i][1][1] = my<<1;
1379 s->mv[i][0][0] = mx;
1380 s->mv[i][0][1] = my;
1381 s->mv[i][1][0] = mx;//not used
1382 s->mv[i][1][1] = my;//not used
1384 if (s->picture_structure == PICT_FRAME) {
1385 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1387 //m = 1 + 2 * s->top_field_first;
1388 m = s->top_field_first ? 1 : 3;
1390 /* top -> top pred */
1391 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1392 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1394 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1395 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1397 mb_type |= MB_TYPE_16x16;
1399 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1400 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1401 if(s->picture_structure == PICT_TOP_FIELD)
1409 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1417 if (HAS_CBP(mb_type)) {
1418 s->dsp.clear_blocks(s->block[0]);
1420 if(!s->chroma_y_shift){
1421 s->dsp.clear_blocks(s->block[6]);
1424 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1425 if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
1426 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1429 if(mb_block_count > 6){
1430 cbp<<= mb_block_count-6;
1431 cbp |= get_bits(&s->gb, mb_block_count-6);
1435 //on 1 we memcpy blocks in xvmcvideo
1436 if(s->avctx->xvmc_acceleration > 1){
1437 XVMC_pack_pblocks(s,cbp);
1444 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1445 if(s->flags2 & CODEC_FLAG2_FAST){
1448 mpeg2_fast_decode_block_non_intra(s, s->pblocks[i], i);
1450 s->block_last_index[i] = -1;
1455 cbp<<= 12-mb_block_count;
1457 for(i=0;i<mb_block_count;i++) {
1458 if ( cbp & (1<<11) ) {
1459 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1462 s->block_last_index[i] = -1;
1468 if(s->flags2 & CODEC_FLAG2_FAST){
1471 mpeg1_fast_decode_block_inter(s, s->pblocks[i], i);
1473 s->block_last_index[i] = -1;
1480 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1483 s->block_last_index[i] = -1;
1491 s->block_last_index[i] = -1;
1495 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1500 /* as h263, but only 17 codes */
1501 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1503 int code, sign, val, l, shift;
1505 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1513 sign = get_bits1(&s->gb);
1517 val = (val - 1) << shift;
1518 val |= get_bits(&s->gb, shift);
1525 /* modulo decoding */
1526 l= INT_BIT - 5 - shift;
1531 static inline int decode_dc(GetBitContext *gb, int component)
1535 if (component == 0) {
1536 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1538 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1541 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1547 diff = get_xbits(gb, code);
1552 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1556 int level, dc, diff, i, j, run;
1558 RLTable *rl = &rl_mpeg1;
1559 uint8_t * const scantable= s->intra_scantable.permutated;
1560 const uint16_t *quant_matrix= s->intra_matrix;
1561 const int qscale= s->qscale;
1564 component = (n <= 3 ? 0 : n - 4 + 1);
1565 diff = decode_dc(&s->gb, component);
1568 dc = s->last_dc[component];
1570 s->last_dc[component] = dc;
1572 dprintf(s->avctx, "dc=%d diff=%d\n", dc, diff);
1575 OPEN_READER(re, &s->gb);
1576 /* now quantify & encode AC coefs */
1578 UPDATE_CACHE(re, &s->gb);
1579 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1583 } else if(level != 0) {
1586 level= (level*qscale*quant_matrix[j])>>4;
1588 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1589 LAST_SKIP_BITS(re, &s->gb, 1);
1592 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1593 UPDATE_CACHE(re, &s->gb);
1594 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1595 if (level == -128) {
1596 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1597 } else if (level == 0) {
1598 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1604 level= (level*qscale*quant_matrix[j])>>4;
1608 level= (level*qscale*quant_matrix[j])>>4;
1613 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1619 CLOSE_READER(re, &s->gb);
1621 s->block_last_index[n] = i;
1625 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1629 int level, i, j, run;
1630 RLTable *rl = &rl_mpeg1;
1631 uint8_t * const scantable= s->intra_scantable.permutated;
1632 const uint16_t *quant_matrix= s->inter_matrix;
1633 const int qscale= s->qscale;
1636 OPEN_READER(re, &s->gb);
1638 /* special case for the first coef. no need to add a second vlc table */
1639 UPDATE_CACHE(re, &s->gb);
1640 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1641 level= (3*qscale*quant_matrix[0])>>5;
1643 if(GET_CACHE(re, &s->gb)&0x40000000)
1647 SKIP_BITS(re, &s->gb, 2);
1648 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1652 /* now quantify & encode AC coefs */
1654 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1659 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1661 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1662 SKIP_BITS(re, &s->gb, 1);
1665 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1666 UPDATE_CACHE(re, &s->gb);
1667 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1668 if (level == -128) {
1669 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1670 } else if (level == 0) {
1671 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1677 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1681 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1686 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1691 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1693 UPDATE_CACHE(re, &s->gb);
1696 LAST_SKIP_BITS(re, &s->gb, 2);
1697 CLOSE_READER(re, &s->gb);
1699 s->block_last_index[n] = i;
1703 static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
1705 int level, i, j, run;
1706 RLTable *rl = &rl_mpeg1;
1707 uint8_t * const scantable= s->intra_scantable.permutated;
1708 const int qscale= s->qscale;
1711 OPEN_READER(re, &s->gb);
1713 /* special case for the first coef. no need to add a second vlc table */
1714 UPDATE_CACHE(re, &s->gb);
1715 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1716 level= (3*qscale)>>1;
1718 if(GET_CACHE(re, &s->gb)&0x40000000)
1722 SKIP_BITS(re, &s->gb, 2);
1723 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1727 /* now quantify & encode AC coefs */
1729 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1734 level= ((level*2+1)*qscale)>>1;
1736 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1737 SKIP_BITS(re, &s->gb, 1);
1740 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1741 UPDATE_CACHE(re, &s->gb);
1742 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1743 if (level == -128) {
1744 level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
1745 } else if (level == 0) {
1746 level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
1752 level= ((level*2+1)*qscale)>>1;
1756 level= ((level*2+1)*qscale)>>1;
1762 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1764 UPDATE_CACHE(re, &s->gb);
1767 LAST_SKIP_BITS(re, &s->gb, 2);
1768 CLOSE_READER(re, &s->gb);
1770 s->block_last_index[n] = i;
1775 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1779 int level, i, j, run;
1780 RLTable *rl = &rl_mpeg1;
1781 uint8_t * const scantable= s->intra_scantable.permutated;
1782 const uint16_t *quant_matrix;
1783 const int qscale= s->qscale;
1789 OPEN_READER(re, &s->gb);
1792 quant_matrix = s->inter_matrix;
1794 quant_matrix = s->chroma_inter_matrix;
1796 /* special case for the first coef. no need to add a second vlc table */
1797 UPDATE_CACHE(re, &s->gb);
1798 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1799 level= (3*qscale*quant_matrix[0])>>5;
1800 if(GET_CACHE(re, &s->gb)&0x40000000)
1805 SKIP_BITS(re, &s->gb, 2);
1806 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1810 /* now quantify & encode AC coefs */
1812 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1817 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1818 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1819 SKIP_BITS(re, &s->gb, 1);
1822 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1823 UPDATE_CACHE(re, &s->gb);
1824 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1829 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1832 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1836 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1842 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1844 UPDATE_CACHE(re, &s->gb);
1847 LAST_SKIP_BITS(re, &s->gb, 2);
1848 CLOSE_READER(re, &s->gb);
1850 block[63] ^= (mismatch & 1);
1852 s->block_last_index[n] = i;
1856 static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
1860 int level, i, j, run;
1861 RLTable *rl = &rl_mpeg1;
1862 uint8_t * const scantable= s->intra_scantable.permutated;
1863 const int qscale= s->qscale;
1864 OPEN_READER(re, &s->gb);
1867 /* special case for the first coef. no need to add a second vlc table */
1868 UPDATE_CACHE(re, &s->gb);
1869 if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
1870 level= (3*qscale)>>1;
1871 if(GET_CACHE(re, &s->gb)&0x40000000)
1875 SKIP_BITS(re, &s->gb, 2);
1876 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1880 /* now quantify & encode AC coefs */
1882 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1887 level= ((level*2+1)*qscale)>>1;
1888 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1889 SKIP_BITS(re, &s->gb, 1);
1892 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1893 UPDATE_CACHE(re, &s->gb);
1894 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1899 level= ((-level*2+1)*qscale)>>1;
1902 level= ((level*2+1)*qscale)>>1;
1907 if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
1909 UPDATE_CACHE(re, &s->gb);
1912 LAST_SKIP_BITS(re, &s->gb, 2);
1913 CLOSE_READER(re, &s->gb);
1914 s->block_last_index[n] = i;
1919 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1923 int level, dc, diff, i, j, run;
1926 uint8_t * const scantable= s->intra_scantable.permutated;
1927 const uint16_t *quant_matrix;
1928 const int qscale= s->qscale;
1933 quant_matrix = s->intra_matrix;
1936 quant_matrix = s->chroma_intra_matrix;
1937 component = (n&1) + 1;
1939 diff = decode_dc(&s->gb, component);
1942 dc = s->last_dc[component];
1944 s->last_dc[component] = dc;
1945 block[0] = dc << (3 - s->intra_dc_precision);
1946 dprintf(s->avctx, "dc=%d\n", block[0]);
1947 mismatch = block[0] ^ 1;
1949 if (s->intra_vlc_format)
1955 OPEN_READER(re, &s->gb);
1956 /* now quantify & encode AC coefs */
1958 UPDATE_CACHE(re, &s->gb);
1959 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
1963 } else if(level != 0) {
1966 level= (level*qscale*quant_matrix[j])>>4;
1967 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1968 LAST_SKIP_BITS(re, &s->gb, 1);
1971 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1972 UPDATE_CACHE(re, &s->gb);
1973 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1977 level= (-level*qscale*quant_matrix[j])>>4;
1980 level= (level*qscale*quant_matrix[j])>>4;
1984 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1991 CLOSE_READER(re, &s->gb);
1993 block[63]^= mismatch&1;
1995 s->block_last_index[n] = i;
1999 static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
2003 int level, dc, diff, j, run;
2006 uint8_t * scantable= s->intra_scantable.permutated;
2007 const uint16_t *quant_matrix;
2008 const int qscale= s->qscale;
2012 quant_matrix = s->intra_matrix;
2015 quant_matrix = s->chroma_intra_matrix;
2016 component = (n&1) + 1;
2018 diff = decode_dc(&s->gb, component);
2021 dc = s->last_dc[component];
2023 s->last_dc[component] = dc;
2024 block[0] = dc << (3 - s->intra_dc_precision);
2025 if (s->intra_vlc_format)
2031 OPEN_READER(re, &s->gb);
2032 /* now quantify & encode AC coefs */
2034 UPDATE_CACHE(re, &s->gb);
2035 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
2039 } else if(level != 0) {
2042 level= (level*qscale*quant_matrix[j])>>4;
2043 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
2044 LAST_SKIP_BITS(re, &s->gb, 1);
2047 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
2048 UPDATE_CACHE(re, &s->gb);
2049 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
2053 level= (-level*qscale*quant_matrix[j])>>4;
2056 level= (level*qscale*quant_matrix[j])>>4;
2062 CLOSE_READER(re, &s->gb);
2065 s->block_last_index[n] = scantable - s->intra_scantable.permutated;
2069 typedef struct Mpeg1Context {
2070 MpegEncContext mpeg_enc_ctx;
2071 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
2072 int repeat_field; /* true if we must repeat the field */
2073 AVPanScan pan_scan; /** some temporary storage for the panscan */
2075 int swap_uv;//indicate VCR2
2076 int save_aspect_info;
2077 int save_width, save_height;
2078 AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
2082 static int mpeg_decode_init(AVCodecContext *avctx)
2084 Mpeg1Context *s = avctx->priv_data;
2085 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2088 //we need some parmutation to store
2089 //matrixes, until MPV_common_init()
2090 //set the real permutatuon
2092 s2->dsp.idct_permutation[i]=i;
2094 MPV_decode_defaults(s2);
2096 s->mpeg_enc_ctx.avctx= avctx;
2097 s->mpeg_enc_ctx.flags= avctx->flags;
2098 s->mpeg_enc_ctx.flags2= avctx->flags2;
2099 common_init(&s->mpeg_enc_ctx);
2102 s->mpeg_enc_ctx_allocated = 0;
2103 s->mpeg_enc_ctx.picture_number = 0;
2104 s->repeat_field = 0;
2105 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
2109 static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
2110 const uint8_t *new_perm){
2111 uint16_t temp_matrix[64];
2114 memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
2117 matrix[new_perm[i]] = temp_matrix[old_perm[i]];
2121 //Call this function when we know all parameters
2122 //it may be called in different places for mpeg1 and mpeg2
2123 static int mpeg_decode_postinit(AVCodecContext *avctx){
2124 Mpeg1Context *s1 = avctx->priv_data;
2125 MpegEncContext *s = &s1->mpeg_enc_ctx;
2126 uint8_t old_permutation[64];
2129 (s1->mpeg_enc_ctx_allocated == 0)||
2130 avctx->coded_width != s->width ||
2131 avctx->coded_height != s->height||
2132 s1->save_width != s->width ||
2133 s1->save_height != s->height ||
2134 s1->save_aspect_info != s->aspect_ratio_info||
2138 if (s1->mpeg_enc_ctx_allocated) {
2139 ParseContext pc= s->parse_context;
2140 s->parse_context.buffer=0;
2142 s->parse_context= pc;
2145 if( (s->width == 0 )||(s->height == 0))
2148 avcodec_set_dimensions(avctx, s->width, s->height);
2149 avctx->bit_rate = s->bit_rate;
2150 s1->save_aspect_info = s->aspect_ratio_info;
2151 s1->save_width = s->width;
2152 s1->save_height = s->height;
2154 //low_delay may be forced, in this case we will have B frames
2155 //that behave like P frames
2156 avctx->has_b_frames = !(s->low_delay);
2158 if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
2160 avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num;
2161 avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
2163 avctx->sample_aspect_ratio= av_d2q(
2164 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
2169 &s->avctx->time_base.den,
2170 &s->avctx->time_base.num,
2171 ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
2172 ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
2175 if(s->aspect_ratio_info > 1){
2176 if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
2177 s->avctx->sample_aspect_ratio=
2179 mpeg2_aspect[s->aspect_ratio_info],
2180 (AVRational){s->width, s->height}
2183 s->avctx->sample_aspect_ratio=
2185 mpeg2_aspect[s->aspect_ratio_info],
2186 (AVRational){s1->pan_scan.width, s1->pan_scan.height}
2190 s->avctx->sample_aspect_ratio=
2191 mpeg2_aspect[s->aspect_ratio_info];
2195 if(avctx->xvmc_acceleration){
2196 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2198 if(s->chroma_format < 2){
2199 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2201 if(s->chroma_format == 2){
2202 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
2204 if(s->chroma_format > 2){
2205 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
2208 //until then pix_fmt may be changed right after codec init
2209 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2210 if( avctx->idct_algo == FF_IDCT_AUTO )
2211 avctx->idct_algo = FF_IDCT_SIMPLE;
2213 //quantization matrixes may need reordering
2214 //if dct permutation is changed
2215 memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
2217 if (MPV_common_init(s) < 0)
2220 quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
2221 quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
2222 quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
2223 quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
2225 s1->mpeg_enc_ctx_allocated = 1;
2230 static int mpeg1_decode_picture(AVCodecContext *avctx,
2231 const uint8_t *buf, int buf_size)
2233 Mpeg1Context *s1 = avctx->priv_data;
2234 MpegEncContext *s = &s1->mpeg_enc_ctx;
2235 int ref, f_code, vbv_delay;
2237 if(mpeg_decode_postinit(s->avctx) < 0)
2240 init_get_bits(&s->gb, buf, buf_size*8);
2242 ref = get_bits(&s->gb, 10); /* temporal ref */
2243 s->pict_type = get_bits(&s->gb, 3);
2244 if(s->pict_type == 0 || s->pict_type > 3)
2247 vbv_delay= get_bits(&s->gb, 16);
2248 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
2249 s->full_pel[0] = get_bits1(&s->gb);
2250 f_code = get_bits(&s->gb, 3);
2251 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2253 s->mpeg_f_code[0][0] = f_code;
2254 s->mpeg_f_code[0][1] = f_code;
2256 if (s->pict_type == B_TYPE) {
2257 s->full_pel[1] = get_bits1(&s->gb);
2258 f_code = get_bits(&s->gb, 3);
2259 if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT)
2261 s->mpeg_f_code[1][0] = f_code;
2262 s->mpeg_f_code[1][1] = f_code;
2264 s->current_picture.pict_type= s->pict_type;
2265 s->current_picture.key_frame= s->pict_type == I_TYPE;
2267 if(avctx->debug & FF_DEBUG_PICT_INFO)
2268 av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
2276 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
2278 MpegEncContext *s= &s1->mpeg_enc_ctx;
2279 int horiz_size_ext, vert_size_ext;
2282 skip_bits(&s->gb, 1); /* profil and level esc*/
2283 s->avctx->profile= get_bits(&s->gb, 3);
2284 s->avctx->level= get_bits(&s->gb, 4);
2285 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
2286 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
2287 horiz_size_ext = get_bits(&s->gb, 2);
2288 vert_size_ext = get_bits(&s->gb, 2);
2289 s->width |= (horiz_size_ext << 12);
2290 s->height |= (vert_size_ext << 12);
2291 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
2292 s->bit_rate += (bit_rate_ext << 18) * 400;
2293 skip_bits1(&s->gb); /* marker */
2294 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
2296 s->low_delay = get_bits1(&s->gb);
2297 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2299 s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
2300 s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
2302 dprintf(s->avctx, "sequence extension\n");
2303 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2304 s->avctx->sub_id = 2; /* indicates mpeg2 found */
2306 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2307 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
2308 s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate);
2312 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
2314 MpegEncContext *s= &s1->mpeg_enc_ctx;
2315 int color_description, w, h;
2317 skip_bits(&s->gb, 3); /* video format */
2318 color_description= get_bits1(&s->gb);
2319 if(color_description){
2320 skip_bits(&s->gb, 8); /* color primaries */
2321 skip_bits(&s->gb, 8); /* transfer_characteristics */
2322 skip_bits(&s->gb, 8); /* matrix_coefficients */
2324 w= get_bits(&s->gb, 14);
2325 skip_bits(&s->gb, 1); //marker
2326 h= get_bits(&s->gb, 14);
2327 skip_bits(&s->gb, 1); //marker
2329 s1->pan_scan.width= 16*w;
2330 s1->pan_scan.height=16*h;
2332 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2333 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
2336 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
2338 MpegEncContext *s= &s1->mpeg_enc_ctx;
2342 if(s->progressive_sequence){
2343 if(s->repeat_first_field){
2345 if(s->top_field_first)
2349 if(s->picture_structure == PICT_FRAME){
2351 if(s->repeat_first_field)
2355 for(i=0; i<nofco; i++){
2356 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
2357 skip_bits(&s->gb, 1); //marker
2358 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
2359 skip_bits(&s->gb, 1); //marker
2362 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2363 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
2364 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
2365 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
2366 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
2370 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
2374 dprintf(s->avctx, "matrix extension\n");
2376 if (get_bits1(&s->gb)) {
2378 v = get_bits(&s->gb, 8);
2379 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2380 s->intra_matrix[j] = v;
2381 s->chroma_intra_matrix[j] = v;
2384 if (get_bits1(&s->gb)) {
2386 v = get_bits(&s->gb, 8);
2387 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2388 s->inter_matrix[j] = v;
2389 s->chroma_inter_matrix[j] = v;
2392 if (get_bits1(&s->gb)) {
2394 v = get_bits(&s->gb, 8);
2395 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2396 s->chroma_intra_matrix[j] = v;
2399 if (get_bits1(&s->gb)) {
2401 v = get_bits(&s->gb, 8);
2402 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2403 s->chroma_inter_matrix[j] = v;
2408 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
2410 s->full_pel[0] = s->full_pel[1] = 0;
2411 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
2412 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
2413 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
2414 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
2415 s->intra_dc_precision = get_bits(&s->gb, 2);
2416 s->picture_structure = get_bits(&s->gb, 2);
2417 s->top_field_first = get_bits1(&s->gb);
2418 s->frame_pred_frame_dct = get_bits1(&s->gb);
2419 s->concealment_motion_vectors = get_bits1(&s->gb);
2420 s->q_scale_type = get_bits1(&s->gb);
2421 s->intra_vlc_format = get_bits1(&s->gb);
2422 s->alternate_scan = get_bits1(&s->gb);
2423 s->repeat_first_field = get_bits1(&s->gb);
2424 s->chroma_420_type = get_bits1(&s->gb);
2425 s->progressive_frame = get_bits1(&s->gb);
2427 if(s->picture_structure == PICT_FRAME){
2429 s->v_edge_pos= 16*s->mb_height;
2431 s->first_field ^= 1;
2432 s->v_edge_pos= 8*s->mb_height;
2433 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
2436 if(s->alternate_scan){
2437 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2438 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
2440 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2441 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
2444 /* composite display not parsed */
2445 dprintf(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
2446 dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure);
2447 dprintf(s->avctx, "top field first=%d\n", s->top_field_first);
2448 dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
2449 dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
2450 dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
2451 dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
2452 dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2453 dprintf(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
2456 static void mpeg_decode_extension(AVCodecContext *avctx,
2457 const uint8_t *buf, int buf_size)
2459 Mpeg1Context *s1 = avctx->priv_data;
2460 MpegEncContext *s = &s1->mpeg_enc_ctx;
2463 init_get_bits(&s->gb, buf, buf_size*8);
2465 ext_type = get_bits(&s->gb, 4);
2468 mpeg_decode_sequence_extension(s1);
2471 mpeg_decode_sequence_display_extension(s1);
2474 mpeg_decode_quant_matrix_extension(s);
2477 mpeg_decode_picture_display_extension(s1);
2480 mpeg_decode_picture_coding_extension(s);
2485 static void exchange_uv(MpegEncContext *s){
2486 short * tmp = s->pblocks[4];
2487 s->pblocks[4] = s->pblocks[5];
2488 s->pblocks[5] = tmp;
2491 static int mpeg_field_start(MpegEncContext *s){
2492 AVCodecContext *avctx= s->avctx;
2493 Mpeg1Context *s1 = (Mpeg1Context*)s;
2495 /* start frame decoding */
2496 if(s->first_field || s->picture_structure==PICT_FRAME){
2497 if(MPV_frame_start(s, avctx) < 0)
2500 ff_er_frame_start(s);
2502 /* first check if we must repeat the frame */
2503 s->current_picture_ptr->repeat_pict = 0;
2504 if (s->repeat_first_field) {
2505 if (s->progressive_sequence) {
2506 if (s->top_field_first)
2507 s->current_picture_ptr->repeat_pict = 4;
2509 s->current_picture_ptr->repeat_pict = 2;
2510 } else if (s->progressive_frame) {
2511 s->current_picture_ptr->repeat_pict = 1;
2515 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2516 }else{ //second field
2519 if(!s->current_picture_ptr){
2520 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2525 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2526 if(s->picture_structure == PICT_BOTTOM_FIELD){
2527 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2532 // MPV_frame_start will call this function too,
2533 // but we need to call it on every field
2534 if(s->avctx->xvmc_acceleration)
2535 XVMC_field_start(s,avctx);
2541 #define DECODE_SLICE_ERROR -1
2542 #define DECODE_SLICE_OK 0
2545 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2546 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2547 * DECODE_SLICE_OK if this slice is ok<br>
2549 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
2550 const uint8_t **buf, int buf_size)
2552 MpegEncContext *s = &s1->mpeg_enc_ctx;
2553 AVCodecContext *avctx= s->avctx;
2555 const int field_pic= s->picture_structure != PICT_FRAME;
2556 const int lowres= s->avctx->lowres;
2561 if (mb_y<<field_pic >= s->mb_height){
2562 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
2566 init_get_bits(&s->gb, *buf, buf_size*8);
2568 ff_mpeg1_clean_buffers(s);
2569 s->interlaced_dct = 0;
2571 s->qscale = get_qscale(s);
2574 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2578 /* extra slice info */
2579 while (get_bits1(&s->gb) != 0) {
2580 skip_bits(&s->gb, 8);
2586 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2588 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2595 /* otherwise, stuffing, nothing to do */
2601 if(s->mb_x >= (unsigned)s->mb_width){
2602 av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
2606 s->resync_mb_x= s->mb_x;
2607 s->resync_mb_y= s->mb_y= mb_y;
2609 ff_init_block_index(s);
2611 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2612 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2613 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",
2614 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],
2615 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2616 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2617 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2618 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2624 //one 1 we memcpy blocks in xvmcvideo
2625 if(s->avctx->xvmc_acceleration > 1)
2626 XVMC_init_block(s);//set s->block
2629 ret = mpeg_decode_mb(s, s->block);
2630 s->chroma_qscale= s->qscale;
2632 dprintf(s->avctx, "ret=%d\n", ret);
2636 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2637 const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
2638 int xy = s->mb_x*2 + s->mb_y*2*wrap;
2639 int motion_x, motion_y, dir, i;
2640 if(field_pic && !s->first_field)
2644 for(dir=0; dir<2; dir++){
2645 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2646 motion_x = motion_y = 0;
2647 }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
2648 motion_x = s->mv[dir][0][0];
2649 motion_y = s->mv[dir][0][1];
2650 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2651 motion_x = s->mv[dir][i][0];
2652 motion_y = s->mv[dir][i][1];
2655 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2656 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2657 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2658 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
2659 s->current_picture.ref_index [dir][xy ]=
2660 s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
2661 assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1);
2667 s->dest[0] += 16 >> lowres;
2668 s->dest[1] += 16 >> (s->chroma_x_shift + lowres);
2669 s->dest[2] += 16 >> (s->chroma_x_shift + lowres);
2671 MPV_decode_mb(s, s->block);
2673 if (++s->mb_x >= s->mb_width) {
2674 const int mb_size= 16>>s->avctx->lowres;
2676 ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size);
2681 if(s->mb_y<<field_pic >= s->mb_height){
2682 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2683 int is_d10= s->chroma_format==2 && s->pict_type==I_TYPE && avctx->profile==0 && avctx->level==5
2684 && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
2685 && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
2687 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
2688 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2689 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
2695 ff_init_block_index(s);
2698 /* skip mb handling */
2699 if (s->mb_skip_run == -1) {
2700 /* read again increment */
2703 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2705 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2710 s->mb_skip_run += 33;
2711 }else if(code == 35){
2712 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2713 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2716 goto eos; /* end of slice */
2718 /* otherwise, stuffing, nothing to do */
2720 s->mb_skip_run += code;
2726 eos: // end of slice
2727 *buf += get_bits_count(&s->gb)/8 - 1;
2728 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2732 static int slice_decode_thread(AVCodecContext *c, void *arg){
2733 MpegEncContext *s= arg;
2734 const uint8_t *buf= s->gb.buffer;
2735 int mb_y= s->start_mb_y;
2737 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2740 uint32_t start_code;
2743 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2745 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2746 //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);
2748 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2749 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);
2751 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);
2754 if(s->mb_y == s->end_mb_y)
2758 buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code);
2759 mb_y= start_code - SLICE_MIN_START_CODE;
2760 if(mb_y < 0 || mb_y >= s->end_mb_y)
2764 return 0; //not reached
2768 * handles slice ends.
2769 * @return 1 if it seems to be the last slice of
2771 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2773 Mpeg1Context *s1 = avctx->priv_data;
2774 MpegEncContext *s = &s1->mpeg_enc_ctx;
2776 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2780 if(s->avctx->xvmc_acceleration)
2783 /* end of slice reached */
2784 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2787 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2793 if (s->pict_type == B_TYPE || s->low_delay) {
2794 *pict= *(AVFrame*)s->current_picture_ptr;
2795 ff_print_debug_info(s, pict);
2797 s->picture_number++;
2798 /* latency of 1 frame for I and P frames */
2799 /* XXX: use another variable than picture_number */
2800 if (s->last_picture_ptr != NULL) {
2801 *pict= *(AVFrame*)s->last_picture_ptr;
2802 ff_print_debug_info(s, pict);
2812 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2813 const uint8_t *buf, int buf_size)
2815 Mpeg1Context *s1 = avctx->priv_data;
2816 MpegEncContext *s = &s1->mpeg_enc_ctx;
2820 init_get_bits(&s->gb, buf, buf_size*8);
2822 width = get_bits(&s->gb, 12);
2823 height = get_bits(&s->gb, 12);
2824 if (width <= 0 || height <= 0 ||
2825 (width % 2) != 0 || (height % 2) != 0)
2827 s->aspect_ratio_info= get_bits(&s->gb, 4);
2828 if (s->aspect_ratio_info == 0)
2830 s->frame_rate_index = get_bits(&s->gb, 4);
2831 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2833 s->bit_rate = get_bits(&s->gb, 18) * 400;
2834 if (get_bits1(&s->gb) == 0) /* marker */
2839 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2840 skip_bits(&s->gb, 1);
2843 if (get_bits1(&s->gb)) {
2845 v = get_bits(&s->gb, 8);
2847 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2850 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2851 s->intra_matrix[j] = v;
2852 s->chroma_intra_matrix[j] = v;
2855 dprintf(s->avctx, "intra matrix present\n");
2857 dprintf(s->avctx, " %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
2858 dprintf(s->avctx, "\n");
2862 j = s->dsp.idct_permutation[i];
2863 v = ff_mpeg1_default_intra_matrix[i];
2864 s->intra_matrix[j] = v;
2865 s->chroma_intra_matrix[j] = v;
2868 if (get_bits1(&s->gb)) {
2870 v = get_bits(&s->gb, 8);
2872 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2875 j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
2876 s->inter_matrix[j] = v;
2877 s->chroma_inter_matrix[j] = v;
2880 dprintf(s->avctx, "non intra matrix present\n");
2882 dprintf(s->avctx, " %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
2883 dprintf(s->avctx, "\n");
2887 int j= s->dsp.idct_permutation[i];
2888 v = ff_mpeg1_default_non_intra_matrix[i];
2889 s->inter_matrix[j] = v;
2890 s->chroma_inter_matrix[j] = v;
2894 if(show_bits(&s->gb, 23) != 0){
2895 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2899 /* we set mpeg2 parameters so that it emulates mpeg1 */
2900 s->progressive_sequence = 1;
2901 s->progressive_frame = 1;
2902 s->picture_structure = PICT_FRAME;
2903 s->frame_pred_frame_dct = 1;
2904 s->chroma_format = 1;
2905 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2906 avctx->sub_id = 1; /* indicates mpeg1 */
2907 s->out_format = FMT_MPEG1;
2908 s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
2909 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2911 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2912 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2913 s->avctx->rc_buffer_size, s->bit_rate);
2918 static int vcr2_init_sequence(AVCodecContext *avctx)
2920 Mpeg1Context *s1 = avctx->priv_data;
2921 MpegEncContext *s = &s1->mpeg_enc_ctx;
2924 /* start new mpeg1 context decoding */
2925 s->out_format = FMT_MPEG1;
2926 if (s1->mpeg_enc_ctx_allocated) {
2929 s->width = avctx->coded_width;
2930 s->height = avctx->coded_height;
2931 avctx->has_b_frames= 0; //true?
2934 if(avctx->xvmc_acceleration){
2935 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2937 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2940 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2941 if( avctx->idct_algo == FF_IDCT_AUTO )
2942 avctx->idct_algo = FF_IDCT_SIMPLE;
2944 if (MPV_common_init(s) < 0)
2946 exchange_uv(s);//common init reset pblocks, so we swap them here
2947 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2948 s1->mpeg_enc_ctx_allocated = 1;
2951 int j= s->dsp.idct_permutation[i];
2952 v = ff_mpeg1_default_intra_matrix[i];
2953 s->intra_matrix[j] = v;
2954 s->chroma_intra_matrix[j] = v;
2956 v = ff_mpeg1_default_non_intra_matrix[i];
2957 s->inter_matrix[j] = v;
2958 s->chroma_inter_matrix[j] = v;
2961 s->progressive_sequence = 1;
2962 s->progressive_frame = 1;
2963 s->picture_structure = PICT_FRAME;
2964 s->frame_pred_frame_dct = 1;
2965 s->chroma_format = 1;
2966 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2967 avctx->sub_id = 2; /* indicates mpeg2 */
2972 static void mpeg_decode_user_data(AVCodecContext *avctx,
2973 const uint8_t *buf, int buf_size)
2980 /* we parse the DTG active format information */
2982 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2996 avctx->dtg_active_format = p[0] & 0x0f;
3001 static void mpeg_decode_gop(AVCodecContext *avctx,
3002 const uint8_t *buf, int buf_size){
3003 Mpeg1Context *s1 = avctx->priv_data;
3004 MpegEncContext *s = &s1->mpeg_enc_ctx;
3006 int drop_frame_flag;
3007 int time_code_hours, time_code_minutes;
3008 int time_code_seconds, time_code_pictures;
3011 init_get_bits(&s->gb, buf, buf_size*8);
3013 drop_frame_flag = get_bits1(&s->gb);
3015 time_code_hours=get_bits(&s->gb,5);
3016 time_code_minutes = get_bits(&s->gb,6);
3017 skip_bits1(&s->gb);//marker bit
3018 time_code_seconds = get_bits(&s->gb,6);
3019 time_code_pictures = get_bits(&s->gb,6);
3021 /*broken_link indicate that after editing the
3022 reference frames of the first B-Frames after GOP I-Frame
3023 are missing (open gop)*/
3024 broken_link = get_bits1(&s->gb);
3026 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
3027 av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
3028 time_code_hours, time_code_minutes, time_code_seconds,
3029 time_code_pictures, broken_link);
3032 * finds the end of the current frame in the bitstream.
3033 * @return the position of the first byte of the next frame, or -1
3035 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
3038 uint32_t state= pc->state;
3041 if(!pc->frame_start_found){
3042 for(i=0; i<buf_size; i++){
3043 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3044 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
3046 pc->frame_start_found=1;
3052 if(pc->frame_start_found){
3053 /* EOF considered as end of frame */
3056 for(; i<buf_size; i++){
3057 i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1;
3058 if((state&0xFFFFFF00) == 0x100){
3059 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
3060 pc->frame_start_found=0;
3068 return END_NOT_FOUND;
3071 /* handle buffering and image synchronisation */
3072 static int mpeg_decode_frame(AVCodecContext *avctx,
3073 void *data, int *data_size,
3074 uint8_t *buf, int buf_size)
3076 Mpeg1Context *s = avctx->priv_data;
3077 const uint8_t *buf_end;
3078 const uint8_t *buf_ptr;
3079 uint32_t start_code;
3080 int ret, input_size;
3081 AVFrame *picture = data;
3082 MpegEncContext *s2 = &s->mpeg_enc_ctx;
3083 dprintf(avctx, "fill_buffer\n");
3085 if (buf_size == 0) {
3086 /* special case for last picture */
3087 if (s2->low_delay==0 && s2->next_picture_ptr) {
3088 *picture= *(AVFrame*)s2->next_picture_ptr;
3089 s2->next_picture_ptr= NULL;
3091 *data_size = sizeof(AVFrame);
3096 if(s2->flags&CODEC_FLAG_TRUNCATED){
3097 int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
3099 if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
3104 buf_end = buf + buf_size;
3107 if (s->repeat_field % 2 == 1) {
3109 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
3110 // s2->picture_number, s->repeat_field);
3111 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
3112 *data_size = sizeof(AVPicture);
3118 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
3119 vcr2_init_sequence(avctx);
3124 /* find start next code */
3126 buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code);
3127 if (start_code > 0x1ff){
3128 if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){
3129 if(avctx->thread_count > 1){
3132 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
3133 for(i=0; i<s->slice_count; i++)
3134 s2->error_count += s2->thread_context[i]->error_count;
3136 if (slice_end(avctx, picture)) {
3137 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
3138 *data_size = sizeof(AVPicture);
3141 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
3144 input_size = buf_end - buf_ptr;
3146 if(avctx->debug & FF_DEBUG_STARTCODE){
3147 av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
3150 /* prepare data for next start code */
3151 switch(start_code) {
3152 case SEQ_START_CODE:
3153 mpeg1_decode_sequence(avctx, buf_ptr,
3157 case PICTURE_START_CODE:
3158 /* we have a complete image : we try to decompress it */
3159 mpeg1_decode_picture(avctx,
3160 buf_ptr, input_size);
3162 case EXT_START_CODE:
3163 mpeg_decode_extension(avctx,
3164 buf_ptr, input_size);
3166 case USER_START_CODE:
3167 mpeg_decode_user_data(avctx,
3168 buf_ptr, input_size);
3170 case GOP_START_CODE:
3172 mpeg_decode_gop(avctx,
3173 buf_ptr, input_size);
3176 if (start_code >= SLICE_MIN_START_CODE &&
3177 start_code <= SLICE_MAX_START_CODE) {
3178 int mb_y= start_code - SLICE_MIN_START_CODE;
3180 if(s2->last_picture_ptr==NULL){
3181 /* skip b frames if we dont have reference frames */
3182 if(s2->pict_type==B_TYPE) break;
3183 /* skip P frames if we dont have reference frame no valid header */
3184 // if(s2->pict_type==P_TYPE && s2->first_field && !s2->first_slice) break;
3186 /* skip b frames if we are in a hurry */
3187 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
3188 if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
3189 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
3190 || avctx->skip_frame >= AVDISCARD_ALL)
3192 /* skip everything if we are in a hurry>=5 */
3193 if(avctx->hurry_up>=5) break;
3195 if (!s->mpeg_enc_ctx_allocated) break;
3197 if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
3198 if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
3202 if(s2->first_slice){
3204 if(mpeg_field_start(s2) < 0)
3207 if(!s2->current_picture_ptr){
3208 av_log(avctx, AV_LOG_ERROR, "current_picture not initalized\n");
3212 if(avctx->thread_count > 1){
3213 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
3214 if(threshold <= mb_y){
3215 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
3217 thread_context->start_mb_y= mb_y;
3218 thread_context->end_mb_y = s2->mb_height;
3220 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
3221 ff_update_duplicate_context(thread_context, s2);
3223 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
3226 buf_ptr += 2; //FIXME add minimum num of bytes per slice
3228 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
3232 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
3233 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);
3235 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);
3244 static int mpeg_decode_end(AVCodecContext *avctx)
3246 Mpeg1Context *s = avctx->priv_data;
3248 if (s->mpeg_enc_ctx_allocated)
3249 MPV_common_end(&s->mpeg_enc_ctx);
3253 AVCodec mpeg1video_decoder = {
3256 CODEC_ID_MPEG1VIDEO,
3257 sizeof(Mpeg1Context),
3262 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3263 .flush= ff_mpeg_flush,
3266 AVCodec mpeg2video_decoder = {
3269 CODEC_ID_MPEG2VIDEO,
3270 sizeof(Mpeg1Context),
3275 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3276 .flush= ff_mpeg_flush,
3280 AVCodec mpegvideo_decoder = {
3283 CODEC_ID_MPEG2VIDEO,
3284 sizeof(Mpeg1Context),
3289 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
3290 .flush= ff_mpeg_flush,
3293 #ifdef CONFIG_ENCODERS
3295 AVCodec mpeg1video_encoder = {
3298 CODEC_ID_MPEG1VIDEO,
3299 sizeof(MpegEncContext),
3303 .supported_framerates= ff_frame_rate_tab+1,
3304 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
3305 .capabilities= CODEC_CAP_DELAY,
3308 AVCodec mpeg2video_encoder = {
3311 CODEC_ID_MPEG2VIDEO,
3312 sizeof(MpegEncContext),
3316 .supported_framerates= ff_frame_rate_tab+1,
3317 .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
3318 .capabilities= CODEC_CAP_DELAY,
3323 static int mpeg_mc_decode_init(AVCodecContext *avctx){
3326 if( avctx->thread_count > 1)
3328 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
3330 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
3331 dprintf(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
3333 mpeg_decode_init(avctx);
3334 s = avctx->priv_data;
3336 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
3337 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
3342 AVCodec mpeg_xvmc_decoder = {
3345 CODEC_ID_MPEG2VIDEO_XVMC,
3346 sizeof(Mpeg1Context),
3347 mpeg_mc_decode_init,
3351 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY,
3352 .flush= ff_mpeg_flush,
3357 /* this is ugly i know, but the alternative is too make
3358 hundreds of vars global and prefix them with ff_mpeg1_
3359 which is far uglier. */