2 * MPEG1 codec / MPEG2 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "mpegvideo.h"
31 #include "mpeg12data.h"
38 #define SEQ_END_CODE 0x000001b7
39 #define SEQ_START_CODE 0x000001b3
40 #define GOP_START_CODE 0x000001b8
41 #define PICTURE_START_CODE 0x00000100
42 #define SLICE_MIN_START_CODE 0x00000101
43 #define SLICE_MAX_START_CODE 0x000001af
44 #define EXT_START_CODE 0x000001b5
45 #define USER_START_CODE 0x000001b2
49 #define MBINCR_VLC_BITS 9
50 #define MB_PAT_VLC_BITS 9
51 #define MB_PTYPE_VLC_BITS 6
52 #define MB_BTYPE_VLC_BITS 6
53 #define TEX_VLC_BITS 9
55 #ifdef CONFIG_ENCODERS
56 static void mpeg1_encode_block(MpegEncContext *s,
59 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
60 #endif //CONFIG_ENCODERS
61 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
64 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
67 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
70 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
73 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
74 static void exchange_uv(MpegEncContext *s);
77 extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
78 extern int XVMC_field_end(MpegEncContext *s);
79 extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
80 extern void XVMC_init_block(MpegEncContext *s);//set s->block
83 const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
84 const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
85 const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1};
86 const enum PixelFormat pixfmt_xvmc_mpg2_420[] = {
87 PIX_FMT_XVMC_MPEG2_IDCT,
88 PIX_FMT_XVMC_MPEG2_MC,
90 #ifdef CONFIG_ENCODERS
91 static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
92 static uint8_t fcode_tab[MAX_MV*2+1];
94 static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
95 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
97 /* simple include everything table for dc, first byte is bits number next 3 are code*/
98 static uint32_t mpeg1_lum_dc_uni[512];
99 static uint32_t mpeg1_chr_dc_uni[512];
101 static uint8_t mpeg1_index_run[2][64];
102 static int8_t mpeg1_max_level[2][64];
103 #endif //CONFIG_ENCODERS
105 static void init_2d_vlc_rl(RLTable *rl)
109 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
110 &rl->table_vlc[0][1], 4, 2,
111 &rl->table_vlc[0][0], 4, 2);
114 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
115 for(i=0; i<rl->vlc.table_size; i++){
116 int code= rl->vlc.table[i][0];
117 int len = rl->vlc.table[i][1];
120 if(len==0){ // illegal code
123 }else if(len<0){ //more bits needed
127 if(code==rl->n){ //esc
130 }else if(code==rl->n+1){ //eob
134 run= rl->table_run [code] + 1;
135 level= rl->table_level[code];
138 rl->rl_vlc[0][i].len= len;
139 rl->rl_vlc[0][i].level= level;
140 rl->rl_vlc[0][i].run= run;
144 #ifdef CONFIG_ENCODERS
145 static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
148 for(i=0; i<128; i++){
151 for(run=0; run<64; run++){
154 int alevel= ABS(level);
155 int sign= (level>>31)&1;
157 if (alevel > rl->max_level[0][run])
160 code= rl->index_run[0][run] + alevel - 1;
162 if (code < 111 /* rl->n */) {
163 /* store the vlc & sign at once */
164 len= mpeg1_vlc[code][1]+1;
165 bits= (mpeg1_vlc[code][0]<<1) + sign;
167 len= mpeg1_vlc[111/*rl->n*/][1]+6;
168 bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
178 bits|= 0x8001 + level + 255;
180 bits|= level & 0xffff;
185 uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
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/frame_rate_tab[i].den*frame_rate_tab[i].num*s->avctx->frame_rate_base;
199 int64_t n1= 1001LL*s->avctx->frame_rate;
200 if(s->avctx->strict_std_compliance >= 0 && 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 >=0){
223 av_log(avctx, AV_LOG_ERROR, "MPEG1/2 doesnt support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
226 av_log(avctx, AV_LOG_INFO, "MPEG1/2 doesnt support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
233 static void put_header(MpegEncContext *s, int header)
235 align_put_bits(&s->pb);
236 put_bits(&s->pb, 16, header>>16);
237 put_bits(&s->pb, 16, header&0xFFFF);
240 /* put sequence header if needed */
241 static void mpeg1_encode_sequence_header(MpegEncContext *s)
243 unsigned int vbv_buffer_size;
247 float best_aspect_error= 1E10;
248 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
249 int constraint_parameter_flag;
251 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
253 if (s->current_picture.key_frame) {
254 AVRational framerate= frame_rate_tab[s->frame_rate_index];
256 /* mpeg1 header repeated every gop */
257 put_header(s, SEQ_START_CODE);
259 put_bits(&s->pb, 12, s->width);
260 put_bits(&s->pb, 12, s->height);
263 float error= aspect_ratio;
264 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
265 error-= 1.0/mpeg1_aspect[i];
267 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
271 if(error < best_aspect_error){
272 best_aspect_error= error;
273 s->aspect_ratio_info= i;
277 put_bits(&s->pb, 4, s->aspect_ratio_info);
278 put_bits(&s->pb, 4, s->frame_rate_index);
280 if(s->avctx->rc_max_rate){
281 v = (s->avctx->rc_max_rate + 399) / 400;
282 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
288 if(s->avctx->rc_buffer_size)
289 vbv_buffer_size = s->avctx->rc_buffer_size;
291 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
292 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
293 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
295 put_bits(&s->pb, 18, v & 0x3FFFF);
296 put_bits(&s->pb, 1, 1); /* marker */
297 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
299 constraint_parameter_flag=
300 s->width <= 768 && s->height <= 576 &&
301 s->mb_width * s->mb_height <= 396 &&
302 s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
303 framerate.num <= framerate.den*30 &&
304 vbv_buffer_size <= 20 &&
306 s->codec_id == CODEC_ID_MPEG1VIDEO;
308 put_bits(&s->pb, 1, constraint_parameter_flag);
310 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
311 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
313 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
314 put_header(s, EXT_START_CODE);
315 put_bits(&s->pb, 4, 1); //seq ext
316 put_bits(&s->pb, 1, 0); //esc
317 put_bits(&s->pb, 3, 4); //profile
318 put_bits(&s->pb, 4, 8); //level
319 put_bits(&s->pb, 1, s->progressive_sequence);
320 put_bits(&s->pb, 2, 1); //chroma format 4:2:0
321 put_bits(&s->pb, 2, 0); //horizontal size ext
322 put_bits(&s->pb, 2, 0); //vertical size ext
323 put_bits(&s->pb, 12, v>>18); //bitrate ext
324 put_bits(&s->pb, 1, 1); //marker
325 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
326 put_bits(&s->pb, 1, s->low_delay);
327 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
328 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
331 put_header(s, GOP_START_CODE);
332 put_bits(&s->pb, 1, 0); /* do drop frame */
333 /* time code : we must convert from the real frame rate to a
334 fake mpeg frame rate in case of low frame rate */
335 fps = (framerate.num + framerate.den/2)/ framerate.den;
336 time_code = s->current_picture_ptr->coded_picture_number;
338 s->gop_picture_number = time_code;
339 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
340 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
341 put_bits(&s->pb, 1, 1);
342 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
343 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
344 put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
345 put_bits(&s->pb, 1, 0); /* broken link */
349 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
351 put_bits(&s->pb, 11, 0x008);
354 put_bits(&s->pb, mbAddrIncrTable[run][1],
355 mbAddrIncrTable[run][0]);
357 #endif //CONFIG_ENCODERS
359 static void common_init(MpegEncContext *s)
362 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
365 void ff_mpeg1_clean_buffers(MpegEncContext *s){
366 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
367 s->last_dc[1] = s->last_dc[0];
368 s->last_dc[2] = s->last_dc[0];
369 memset(s->last_mv, 0, sizeof(s->last_mv));
372 #ifdef CONFIG_ENCODERS
374 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
375 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
376 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
377 put_bits(&s->pb, 1, 0); /* slice extra information */
380 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
382 mpeg1_encode_sequence_header(s);
384 /* mpeg1 picture header */
385 put_header(s, PICTURE_START_CODE);
386 /* temporal reference */
388 // RAL: s->picture_number instead of s->fake_picture_number
389 put_bits(&s->pb, 10, (s->picture_number -
390 s->gop_picture_number) & 0x3ff);
391 put_bits(&s->pb, 3, s->pict_type);
393 s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
394 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
396 // RAL: Forward f_code also needed for B frames
397 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
398 put_bits(&s->pb, 1, 0); /* half pel coordinates */
399 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
400 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
402 put_bits(&s->pb, 3, 7); /* forward_f_code */
405 // RAL: Backward f_code necessary for B frames
406 if (s->pict_type == B_TYPE) {
407 put_bits(&s->pb, 1, 0); /* half pel coordinates */
408 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
409 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
411 put_bits(&s->pb, 3, 7); /* backward_f_code */
414 put_bits(&s->pb, 1, 0); /* extra bit picture */
416 s->frame_pred_frame_dct = 1;
417 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
418 put_header(s, EXT_START_CODE);
419 put_bits(&s->pb, 4, 8); //pic ext
420 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
421 put_bits(&s->pb, 4, s->f_code);
422 put_bits(&s->pb, 4, s->f_code);
424 put_bits(&s->pb, 8, 255);
426 if (s->pict_type == B_TYPE) {
427 put_bits(&s->pb, 4, s->b_code);
428 put_bits(&s->pb, 4, s->b_code);
430 put_bits(&s->pb, 8, 255);
432 put_bits(&s->pb, 2, s->intra_dc_precision);
434 assert(s->picture_structure == PICT_FRAME);
435 put_bits(&s->pb, 2, s->picture_structure);
436 if (s->progressive_sequence) {
437 put_bits(&s->pb, 1, 0); /* no repeat */
439 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
441 /* XXX: optimize the generation of this flag with entropy
443 s->frame_pred_frame_dct = s->progressive_sequence;
445 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
446 put_bits(&s->pb, 1, s->concealment_motion_vectors);
447 put_bits(&s->pb, 1, s->q_scale_type);
448 put_bits(&s->pb, 1, s->intra_vlc_format);
449 put_bits(&s->pb, 1, s->alternate_scan);
450 put_bits(&s->pb, 1, s->repeat_first_field);
451 put_bits(&s->pb, 1, s->chroma_420_type=1);
452 s->progressive_frame = s->progressive_sequence;
453 put_bits(&s->pb, 1, s->progressive_frame);
454 put_bits(&s->pb, 1, 0); //composite_display_flag
456 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
459 put_header(s, USER_START_CODE);
460 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
461 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
466 ff_mpeg1_encode_slice_header(s);
469 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
470 int has_mv, int field_motion)
472 put_bits(&s->pb, n, bits);
473 if (!s->frame_pred_frame_dct) {
475 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
476 put_bits(&s->pb, 1, s->interlaced_dct);
480 void mpeg1_encode_mb(MpegEncContext *s,
481 DCTELEM block[6][64],
482 int motion_x, int motion_y)
485 const int mb_x = s->mb_x;
486 const int mb_y = s->mb_y;
487 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
492 if (s->block_last_index[i] >= 0)
496 if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
497 ((s->pict_type == P_TYPE && s->mv_type == MV_TYPE_16X16 && (motion_x | motion_y) == 0) ||
498 (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) |
499 ((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))) {
501 s->qscale -= s->dquant;
505 if(s->pict_type == P_TYPE){
506 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
507 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
511 assert(s->mb_skip_run == 0);
512 encode_mb_skip_run(s, s->mb_x);
514 encode_mb_skip_run(s, s->mb_skip_run);
517 if (s->pict_type == I_TYPE) {
518 if(s->dquant && cbp){
519 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
520 put_bits(&s->pb, 5, s->qscale);
522 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
523 s->qscale -= s->dquant;
525 s->misc_bits+= get_bits_diff(s);
527 } else if (s->mb_intra) {
528 if(s->dquant && cbp){
529 put_mb_modes(s, 6, 0x01, 0, 0);
530 put_bits(&s->pb, 5, s->qscale);
532 put_mb_modes(s, 5, 0x03, 0, 0);
533 s->qscale -= s->dquant;
535 s->misc_bits+= get_bits_diff(s);
537 memset(s->last_mv, 0, sizeof(s->last_mv));
538 } else if (s->pict_type == P_TYPE) {
539 if(s->mv_type == MV_TYPE_16X16){
541 if ((motion_x|motion_y) == 0) {
543 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
544 put_bits(&s->pb, 5, s->qscale);
546 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
548 s->misc_bits+= get_bits_diff(s);
551 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
552 put_bits(&s->pb, 5, s->qscale);
554 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
556 s->misc_bits+= get_bits_diff(s);
557 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
558 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
559 s->mv_bits+= get_bits_diff(s);
562 put_bits(&s->pb, 3, 1); /* motion only */
563 if (!s->frame_pred_frame_dct)
564 put_bits(&s->pb, 2, 2); /* motion_type: frame */
565 s->misc_bits+= get_bits_diff(s);
566 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
567 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
568 s->qscale -= s->dquant;
569 s->mv_bits+= get_bits_diff(s);
571 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
572 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
574 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
578 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
579 put_bits(&s->pb, 5, s->qscale);
581 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
584 put_bits(&s->pb, 3, 1); /* motion only */
585 put_bits(&s->pb, 2, 1); /* motion_type: field */
586 s->qscale -= s->dquant;
588 s->misc_bits+= get_bits_diff(s);
590 put_bits(&s->pb, 1, s->field_select[0][i]);
591 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
592 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
593 s->last_mv[0][i][0]= s->mv[0][i][0];
594 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
596 s->mv_bits+= get_bits_diff(s);
599 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
602 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
604 if(s->mv_type == MV_TYPE_16X16){
605 if (cbp){ // With coded bloc pattern
607 if(s->mv_dir == MV_DIR_FORWARD)
608 put_mb_modes(s, 6, 3, 1, 0);
610 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
611 put_bits(&s->pb, 5, s->qscale);
613 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
615 }else{ // No coded bloc pattern
616 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
617 if (!s->frame_pred_frame_dct)
618 put_bits(&s->pb, 2, 2); /* motion_type: frame */
619 s->qscale -= s->dquant;
621 s->misc_bits += get_bits_diff(s);
622 if (s->mv_dir&MV_DIR_FORWARD){
623 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
624 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
625 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
626 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
629 if (s->mv_dir&MV_DIR_BACKWARD){
630 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
631 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
632 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
633 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
637 assert(s->mv_type == MV_TYPE_FIELD);
638 assert(!s->frame_pred_frame_dct);
639 if (cbp){ // With coded bloc pattern
641 if(s->mv_dir == MV_DIR_FORWARD)
642 put_mb_modes(s, 6, 3, 1, 1);
644 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
645 put_bits(&s->pb, 5, s->qscale);
647 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
649 }else{ // No coded bloc pattern
650 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
651 put_bits(&s->pb, 2, 1); /* motion_type: field */
652 s->qscale -= s->dquant;
654 s->misc_bits += get_bits_diff(s);
655 if (s->mv_dir&MV_DIR_FORWARD){
657 put_bits(&s->pb, 1, s->field_select[0][i]);
658 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
659 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
660 s->last_mv[0][i][0]= s->mv[0][i][0];
661 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
665 if (s->mv_dir&MV_DIR_BACKWARD){
667 put_bits(&s->pb, 1, s->field_select[1][i]);
668 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
669 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
670 s->last_mv[1][i][0]= s->mv[1][i][0];
671 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
676 s->mv_bits += get_bits_diff(s);
678 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
681 if (cbp & (1 << (5 - i))) {
682 mpeg1_encode_block(s, block[i], i);
687 s->i_tex_bits+= get_bits_diff(s);
689 s->p_tex_bits+= get_bits_diff(s);
693 // RAL: Parameter added: f_or_b_code
694 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
696 int code, bit_size, l, m, bits, range, sign;
702 mbMotionVectorTable[0][1],
703 mbMotionVectorTable[0][0]);
705 bit_size = f_or_b_code - 1;
706 range = 1 << bit_size;
707 /* modulo encoding */
712 } else if (val >= l) {
718 code = (val >> bit_size) + 1;
719 bits = val & (range - 1);
724 code = (val >> bit_size) + 1;
725 bits = val & (range - 1);
729 assert(code > 0 && code <= 16);
732 mbMotionVectorTable[code][1],
733 mbMotionVectorTable[code][0]);
735 put_bits(&s->pb, 1, sign);
737 put_bits(&s->pb, bit_size, bits);
742 void ff_mpeg1_encode_init(MpegEncContext *s)
758 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
759 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
762 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
764 /* build unified dc encoding tables */
765 for(i=-255; i<256; i++)
773 index = vlc_dc_table[adiff];
775 bits= vlc_dc_lum_bits[index] + index;
776 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
777 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
779 bits= vlc_dc_chroma_bits[index] + index;
780 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
781 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
784 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
786 for(f_code=1; f_code<=MAX_FCODE; f_code++){
787 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
790 if(mv==0) len= mbMotionVectorTable[0][1];
792 int val, bit_size, range, code;
794 bit_size = s->f_code - 1;
795 range = 1 << bit_size;
801 code = (val >> bit_size) + 1;
803 len= mbMotionVectorTable[code][1] + 1 + bit_size;
805 len= mbMotionVectorTable[16][1] + 2 + bit_size;
809 mv_penalty[f_code][mv+MAX_MV]= len;
814 for(f_code=MAX_FCODE; f_code>0; f_code--){
815 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
816 fcode_tab[mv+MAX_MV]= f_code;
820 s->me.mv_penalty= mv_penalty;
821 s->fcode_tab= fcode_tab;
822 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
829 s->intra_ac_vlc_length=
830 s->inter_ac_vlc_length=
831 s->intra_ac_vlc_last_length=
832 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
835 static inline void encode_dc(MpegEncContext *s, int diff, int component)
837 if (component == 0) {
840 mpeg1_lum_dc_uni[diff+255]&0xFF,
841 mpeg1_lum_dc_uni[diff+255]>>8);
845 mpeg1_chr_dc_uni[diff+255]&0xFF,
846 mpeg1_chr_dc_uni[diff+255]>>8);
850 static void mpeg1_encode_block(MpegEncContext *s,
854 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
856 // RLTable *rl = &rl_mpeg1;
858 last_index = s->block_last_index[n];
862 component = (n <= 3 ? 0 : n - 4 + 1);
863 dc = block[0]; /* overflow is impossible */
864 diff = dc - s->last_dc[component];
865 encode_dc(s, diff, component);
866 s->last_dc[component] = dc;
869 if (s->intra_vlc_format)
875 /* encode the first coefficient : needs to be done here because
876 it is handled slightly differently */
878 if (abs(level) == 1) {
879 code = ((uint32_t)level >> 31); /* the sign bit */
880 put_bits(&s->pb, 2, code | 0x02);
889 /* now quantify & encode AC coefs */
890 last_non_zero = i - 1;
892 for(;i<=last_index;i++) {
893 j = s->intra_scantable.permutated[i];
898 dprintf("level[%d]=%d\n", i, level);
900 /* encode using VLC */
902 run = i - last_non_zero - 1;
905 MASK_ABS(sign, alevel)
908 // code = get_rl_index(rl, 0, run, alevel);
909 if (alevel <= mpeg1_max_level[0][run]){
910 code= mpeg1_index_run[0][run] + alevel - 1;
911 /* store the vlc & sign at once */
912 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
914 /* escape seems to be pretty rare <5% so i dont optimize it */
915 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
916 /* escape: only clip in this case */
917 put_bits(&s->pb, 6, run);
918 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
920 put_bits(&s->pb, 8, level & 0xff);
923 put_bits(&s->pb, 16, 0x8001 + level + 255);
925 put_bits(&s->pb, 16, level & 0xffff);
929 put_bits(&s->pb, 12, level & 0xfff);
936 put_bits(&s->pb, 2, 0x2);
938 #endif //CONFIG_ENCODERS
940 /******************************************/
943 static VLC dc_lum_vlc;
944 static VLC dc_chroma_vlc;
946 static VLC mbincr_vlc;
947 static VLC mb_ptype_vlc;
948 static VLC mb_btype_vlc;
949 static VLC mb_pat_vlc;
951 static void init_vlcs()
958 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
959 vlc_dc_lum_bits, 1, 1,
960 vlc_dc_lum_code, 2, 2);
961 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
962 vlc_dc_chroma_bits, 1, 1,
963 vlc_dc_chroma_code, 2, 2);
964 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
965 &mbMotionVectorTable[0][1], 2, 1,
966 &mbMotionVectorTable[0][0], 2, 1);
967 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
968 &mbAddrIncrTable[0][1], 2, 1,
969 &mbAddrIncrTable[0][0], 2, 1);
970 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
971 &mbPatTable[0][1], 2, 1,
972 &mbPatTable[0][0], 2, 1);
974 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
975 &table_mb_ptype[0][1], 2, 1,
976 &table_mb_ptype[0][0], 2, 1);
977 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
978 &table_mb_btype[0][1], 2, 1,
979 &table_mb_btype[0][0], 2, 1);
983 init_2d_vlc_rl(&rl_mpeg1);
984 init_2d_vlc_rl(&rl_mpeg2);
988 static inline int get_dmv(MpegEncContext *s)
990 if(get_bits1(&s->gb))
991 return 1 - (get_bits1(&s->gb) << 1);
996 static inline int get_qscale(MpegEncContext *s)
998 int qscale = get_bits(&s->gb, 5);
999 if (s->q_scale_type) {
1000 return non_linear_qscale[qscale];
1006 /* motion type (for mpeg2) */
1012 static int mpeg_decode_mb(MpegEncContext *s,
1013 DCTELEM block[12][64])
1015 int i, j, k, cbp, val, mb_type, motion_type;
1017 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1019 assert(s->mb_skiped==0);
1021 if (s->mb_skip_run-- != 0) {
1022 if(s->pict_type == I_TYPE){
1023 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1030 s->block_last_index[i] = -1;
1031 if(s->picture_structure == PICT_FRAME)
1032 s->mv_type = MV_TYPE_16X16;
1034 s->mv_type = MV_TYPE_FIELD;
1035 if (s->pict_type == P_TYPE) {
1036 /* if P type, zero motion vector is implied */
1037 s->mv_dir = MV_DIR_FORWARD;
1038 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1039 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1040 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1041 s->field_select[0][0]= s->picture_structure - 1;
1043 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1045 /* if B type, reuse previous vectors and directions */
1046 s->mv[0][0][0] = s->last_mv[0][0][0];
1047 s->mv[0][0][1] = s->last_mv[0][0][1];
1048 s->mv[1][0][0] = s->last_mv[1][0][0];
1049 s->mv[1][0][1] = s->last_mv[1][0][1];
1051 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1052 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1053 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1055 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1062 switch(s->pict_type) {
1065 if (get_bits1(&s->gb) == 0) {
1066 if (get_bits1(&s->gb) == 0){
1067 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1070 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1072 mb_type = MB_TYPE_INTRA;
1076 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1078 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1081 mb_type = ptype2mb_type[ mb_type ];
1084 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1086 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1089 mb_type = btype2mb_type[ mb_type ];
1092 dprintf("mb_type=%x\n", mb_type);
1093 // motion_type = 0; /* avoid warning */
1094 if (IS_INTRA(mb_type)) {
1095 /* compute dct type */
1096 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1097 !s->frame_pred_frame_dct) {
1098 s->interlaced_dct = get_bits1(&s->gb);
1101 if (IS_QUANT(mb_type))
1102 s->qscale = get_qscale(s);
1104 if (s->concealment_motion_vectors) {
1105 /* just parse them */
1106 if (s->picture_structure != PICT_FRAME)
1107 skip_bits1(&s->gb); /* field select */
1109 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1110 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1111 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1112 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1114 skip_bits1(&s->gb); /* marker */
1116 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1119 //one 1 we memcpy blocks in xvmcvideo
1120 if(s->avctx->xvmc_acceleration > 1){
1121 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1128 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1129 for(i=0;i<4+(1<<s->chroma_format);i++) {
1130 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1135 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1140 if (mb_type & MB_TYPE_ZERO_MV){
1141 assert(mb_type & MB_TYPE_CBP);
1143 /* compute dct type */
1144 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1145 !s->frame_pred_frame_dct) {
1146 s->interlaced_dct = get_bits1(&s->gb);
1149 if (IS_QUANT(mb_type))
1150 s->qscale = get_qscale(s);
1152 s->mv_dir = MV_DIR_FORWARD;
1153 if(s->picture_structure == PICT_FRAME)
1154 s->mv_type = MV_TYPE_16X16;
1156 s->mv_type = MV_TYPE_FIELD;
1157 mb_type |= MB_TYPE_INTERLACED;
1158 s->field_select[0][0]= s->picture_structure - 1;
1160 s->last_mv[0][0][0] = 0;
1161 s->last_mv[0][0][1] = 0;
1162 s->last_mv[0][1][0] = 0;
1163 s->last_mv[0][1][1] = 0;
1167 assert(mb_type & MB_TYPE_L0L1);
1168 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1169 /* get additionnal motion vector type */
1170 if (s->frame_pred_frame_dct)
1171 motion_type = MT_FRAME;
1173 motion_type = get_bits(&s->gb, 2);
1176 /* compute dct type */
1177 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1178 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1179 s->interlaced_dct = get_bits1(&s->gb);
1182 if (IS_QUANT(mb_type))
1183 s->qscale = get_qscale(s);
1185 /* motion vectors */
1188 if (USES_LIST(mb_type, i)) {
1189 s->mv_dir |= (MV_DIR_FORWARD >> i);
1190 dprintf("motion_type=%d\n", motion_type);
1191 switch(motion_type) {
1192 case MT_FRAME: /* or MT_16X8 */
1193 if (s->picture_structure == PICT_FRAME) {
1195 mb_type |= MB_TYPE_16x16;
1196 s->mv_type = MV_TYPE_16X16;
1197 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1198 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1199 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1200 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1201 /* full_pel: only for mpeg1 */
1202 if (s->full_pel[i]){
1203 s->mv[i][0][0] <<= 1;
1204 s->mv[i][0][1] <<= 1;
1208 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1209 s->mv_type = MV_TYPE_16X8;
1211 s->field_select[i][j] = get_bits1(&s->gb);
1213 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1214 s->last_mv[i][j][k]);
1215 s->last_mv[i][j][k] = val;
1216 s->mv[i][j][k] = val;
1222 s->mv_type = MV_TYPE_FIELD;
1223 if (s->picture_structure == PICT_FRAME) {
1224 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1226 s->field_select[i][j] = get_bits1(&s->gb);
1227 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1228 s->last_mv[i][j][0]);
1229 s->last_mv[i][j][0] = val;
1230 s->mv[i][j][0] = val;
1231 dprintf("fmx=%d\n", val);
1232 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1233 s->last_mv[i][j][1] >> 1);
1234 s->last_mv[i][j][1] = val << 1;
1235 s->mv[i][j][1] = val;
1236 dprintf("fmy=%d\n", val);
1239 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1240 s->field_select[i][0] = get_bits1(&s->gb);
1242 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1243 s->last_mv[i][0][k]);
1244 s->last_mv[i][0][k] = val;
1245 s->last_mv[i][1][k] = val;
1246 s->mv[i][0][k] = val;
1252 int dmx, dmy, mx, my, m;
1254 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1255 s->last_mv[i][0][0]);
1256 s->last_mv[i][0][0] = mx;
1257 s->last_mv[i][1][0] = mx;
1259 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1260 s->last_mv[i][0][1] >> 1);
1262 s->mv_type = MV_TYPE_DMV;
1265 s->last_mv[i][0][1] = my<<1;
1266 s->last_mv[i][1][1] = my<<1;
1268 s->mv[i][0][0] = mx;
1269 s->mv[i][0][1] = my;
1270 s->mv[i][1][0] = mx;//not used
1271 s->mv[i][1][1] = my;//not used
1273 if (s->picture_structure == PICT_FRAME) {
1274 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1276 //m = 1 + 2 * s->top_field_first;
1277 m = s->top_field_first ? 1 : 3;
1279 /* top -> top pred */
1280 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1281 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1283 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1284 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1286 mb_type |= MB_TYPE_16x16;
1288 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1289 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1290 if(s->picture_structure == PICT_TOP_FIELD)
1298 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1307 if (HAS_CBP(mb_type)) {
1308 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1310 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1314 if(s->chroma_format == 2){//CHROMA422
1315 cbp|= ( get_bits(&s->gb,2) ) << 6;
1317 if(s->chroma_format > 2){//CHROMA444
1318 cbp|= ( get_bits(&s->gb,6) ) << 6;
1322 //on 1 we memcpy blocks in xvmcvideo
1323 if(s->avctx->xvmc_acceleration > 1){
1324 XVMC_pack_pblocks(s,cbp);
1331 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1333 if (cbp & (1<<(5-i)) ) {
1334 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1337 s->block_last_index[i] = -1;
1340 if (s->chroma_format >= 2) {
1341 if (s->chroma_format == 2) {//CHROMA_422)
1343 if (cbp & (1<<(6+7-i)) ) {
1344 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1347 s->block_last_index[i] = -1;
1350 }else{ /*CHROMA_444*/
1352 if (cbp & (1<<(6+11-i)) ) {
1353 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1356 s->block_last_index[i] = -1;
1364 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1367 s->block_last_index[i] = -1;
1374 s->block_last_index[i] = -1;
1378 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1383 /* as h263, but only 17 codes */
1384 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1386 int code, sign, val, l, shift;
1388 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1396 sign = get_bits1(&s->gb);
1400 val = (val - 1) << shift;
1401 val |= get_bits(&s->gb, shift);
1408 /* modulo decoding */
1410 val = ((val + l)&(l*2-1)) - l;
1414 static inline int decode_dc(GetBitContext *gb, int component)
1418 if (component == 0) {
1419 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1421 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1424 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1430 diff = get_xbits(gb, code);
1435 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1439 int level, dc, diff, i, j, run;
1441 RLTable *rl = &rl_mpeg1;
1442 uint8_t * const scantable= s->intra_scantable.permutated;
1443 const uint16_t *quant_matrix= s->intra_matrix;
1444 const int qscale= s->qscale;
1447 component = (n <= 3 ? 0 : n - 4 + 1);
1448 diff = decode_dc(&s->gb, component);
1451 dc = s->last_dc[component];
1453 s->last_dc[component] = dc;
1455 dprintf("dc=%d diff=%d\n", dc, diff);
1458 OPEN_READER(re, &s->gb);
1459 /* now quantify & encode AC coefs */
1461 UPDATE_CACHE(re, &s->gb);
1462 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1466 } else if(level != 0) {
1469 level= (level*qscale*quant_matrix[j])>>4;
1471 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1472 LAST_SKIP_BITS(re, &s->gb, 1);
1475 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1476 UPDATE_CACHE(re, &s->gb);
1477 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1478 if (level == -128) {
1479 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1480 } else if (level == 0) {
1481 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1487 level= (level*qscale*quant_matrix[j])>>4;
1491 level= (level*qscale*quant_matrix[j])>>4;
1496 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1502 CLOSE_READER(re, &s->gb);
1504 s->block_last_index[n] = i;
1508 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1512 int level, i, j, run;
1513 RLTable *rl = &rl_mpeg1;
1514 uint8_t * const scantable= s->intra_scantable.permutated;
1515 const uint16_t *quant_matrix= s->inter_matrix;
1516 const int qscale= s->qscale;
1520 OPEN_READER(re, &s->gb);
1522 /* special case for the first coef. no need to add a second vlc table */
1523 UPDATE_CACHE(re, &s->gb);
1524 v= SHOW_UBITS(re, &s->gb, 2);
1526 LAST_SKIP_BITS(re, &s->gb, 2);
1527 level= (3*qscale*quant_matrix[0])>>5;
1535 /* now quantify & encode AC coefs */
1537 UPDATE_CACHE(re, &s->gb);
1538 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1542 } else if(level != 0) {
1545 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1547 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1548 LAST_SKIP_BITS(re, &s->gb, 1);
1551 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1552 UPDATE_CACHE(re, &s->gb);
1553 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1554 if (level == -128) {
1555 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1556 } else if (level == 0) {
1557 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1563 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1567 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1572 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1578 CLOSE_READER(re, &s->gb);
1580 s->block_last_index[n] = i;
1584 /* Also does unquantization here, since I will never support mpeg2
1586 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1590 int level, i, j, run;
1591 RLTable *rl = &rl_mpeg1;
1592 uint8_t * const scantable= s->intra_scantable.permutated;
1593 const uint16_t *quant_matrix;
1594 const int qscale= s->qscale;
1601 OPEN_READER(re, &s->gb);
1604 quant_matrix = s->inter_matrix;
1606 quant_matrix = s->chroma_inter_matrix;
1608 /* special case for the first coef. no need to add a second vlc table */
1609 UPDATE_CACHE(re, &s->gb);
1610 v= SHOW_UBITS(re, &s->gb, 2);
1612 LAST_SKIP_BITS(re, &s->gb, 2);
1613 level= (3*qscale*quant_matrix[0])>>5;
1621 /* now quantify & encode AC coefs */
1623 UPDATE_CACHE(re, &s->gb);
1624 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1628 } else if(level != 0) {
1631 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1632 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1633 LAST_SKIP_BITS(re, &s->gb, 1);
1636 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1637 UPDATE_CACHE(re, &s->gb);
1638 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1643 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1646 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1650 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1657 CLOSE_READER(re, &s->gb);
1659 block[63] ^= (mismatch & 1);
1661 s->block_last_index[n] = i;
1665 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1669 int level, dc, diff, i, j, run;
1672 uint8_t * const scantable= s->intra_scantable.permutated;
1673 const uint16_t *quant_matrix;
1674 const int qscale= s->qscale;
1679 quant_matrix = s->intra_matrix;
1682 quant_matrix = s->chroma_intra_matrix;
1683 component = (n&1) + 1;
1685 diff = decode_dc(&s->gb, component);
1688 dc = s->last_dc[component];
1690 s->last_dc[component] = dc;
1691 block[0] = dc << (3 - s->intra_dc_precision);
1692 dprintf("dc=%d\n", block[0]);
1693 mismatch = block[0] ^ 1;
1695 if (s->intra_vlc_format)
1701 OPEN_READER(re, &s->gb);
1702 /* now quantify & encode AC coefs */
1704 UPDATE_CACHE(re, &s->gb);
1705 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1709 } else if(level != 0) {
1712 level= (level*qscale*quant_matrix[j])>>4;
1713 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1714 LAST_SKIP_BITS(re, &s->gb, 1);
1717 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1718 UPDATE_CACHE(re, &s->gb);
1719 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1723 level= (-level*qscale*quant_matrix[j])>>4;
1726 level= (level*qscale*quant_matrix[j])>>4;
1730 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1737 CLOSE_READER(re, &s->gb);
1739 block[63]^= mismatch&1;
1741 s->block_last_index[n] = i;
1745 typedef struct Mpeg1Context {
1746 MpegEncContext mpeg_enc_ctx;
1747 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1748 int repeat_field; /* true if we must repeat the field */
1749 AVPanScan pan_scan; /** some temporary storage for the panscan */
1753 static int mpeg_decode_init(AVCodecContext *avctx)
1755 Mpeg1Context *s = avctx->priv_data;
1757 s->mpeg_enc_ctx.avctx= avctx;
1758 s->mpeg_enc_ctx.flags= avctx->flags;
1759 s->mpeg_enc_ctx.flags2= avctx->flags2;
1760 common_init(&s->mpeg_enc_ctx);
1763 s->mpeg_enc_ctx_allocated = 0;
1764 s->mpeg_enc_ctx.picture_number = 0;
1765 s->repeat_field = 0;
1766 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1770 /* return the 8 bit start code value and update the search
1771 state. Return -1 if no start code found */
1772 static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
1775 unsigned int state=0xFFFFFFFF, v;
1778 buf_ptr = *pbuf_ptr;
1779 while (buf_ptr < buf_end) {
1781 if (state == 0x000001) {
1782 state = ((state << 8) | v) & 0xffffff;
1786 state = ((state << 8) | v) & 0xffffff;
1790 *pbuf_ptr = buf_ptr;
1794 static int mpeg1_decode_picture(AVCodecContext *avctx,
1795 uint8_t *buf, int buf_size)
1797 Mpeg1Context *s1 = avctx->priv_data;
1798 MpegEncContext *s = &s1->mpeg_enc_ctx;
1799 int ref, f_code, vbv_delay;
1801 init_get_bits(&s->gb, buf, buf_size*8);
1803 ref = get_bits(&s->gb, 10); /* temporal ref */
1804 s->pict_type = get_bits(&s->gb, 3);
1806 vbv_delay= get_bits(&s->gb, 16);
1807 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
1808 s->full_pel[0] = get_bits1(&s->gb);
1809 f_code = get_bits(&s->gb, 3);
1812 s->mpeg_f_code[0][0] = f_code;
1813 s->mpeg_f_code[0][1] = f_code;
1815 if (s->pict_type == B_TYPE) {
1816 s->full_pel[1] = get_bits1(&s->gb);
1817 f_code = get_bits(&s->gb, 3);
1820 s->mpeg_f_code[1][0] = f_code;
1821 s->mpeg_f_code[1][1] = f_code;
1823 s->current_picture.pict_type= s->pict_type;
1824 s->current_picture.key_frame= s->pict_type == I_TYPE;
1826 // if(avctx->debug & FF_DEBUG_PICT_INFO)
1827 // av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d\n", vbv_delay, ref);
1835 static void mpeg_decode_sequence_extension(MpegEncContext *s)
1837 int horiz_size_ext, vert_size_ext;
1839 int frame_rate_ext_n, frame_rate_ext_d;
1842 skip_bits(&s->gb, 1); /* profil and level esc*/
1843 profile= get_bits(&s->gb, 3);
1844 level= get_bits(&s->gb, 4);
1845 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1846 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1847 horiz_size_ext = get_bits(&s->gb, 2);
1848 vert_size_ext = get_bits(&s->gb, 2);
1849 s->width |= (horiz_size_ext << 12);
1850 s->height |= (vert_size_ext << 12);
1851 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1852 s->bit_rate += (bit_rate_ext << 12) * 400;
1853 skip_bits1(&s->gb); /* marker */
1854 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
1856 s->low_delay = get_bits1(&s->gb);
1857 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1859 frame_rate_ext_n = get_bits(&s->gb, 2);
1860 frame_rate_ext_d = get_bits(&s->gb, 5);
1862 &s->avctx->frame_rate,
1863 &s->avctx->frame_rate_base,
1864 frame_rate_tab[s->frame_rate_index].num * (frame_rate_ext_n+1),
1865 frame_rate_tab[s->frame_rate_index].den * (frame_rate_ext_d+1),
1868 dprintf("sequence extension\n");
1869 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1870 s->avctx->sub_id = 2; /* indicates mpeg2 found */
1872 if(s->aspect_ratio_info <= 1)
1873 s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
1875 s->avctx->sample_aspect_ratio=
1877 mpeg2_aspect[s->aspect_ratio_info],
1878 (AVRational){s->width, s->height}
1882 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1883 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1884 profile, level, s->avctx->rc_buffer_size, s->bit_rate);
1887 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1889 MpegEncContext *s= &s1->mpeg_enc_ctx;
1890 int color_description, w, h;
1892 skip_bits(&s->gb, 3); /* video format */
1893 color_description= get_bits1(&s->gb);
1894 if(color_description){
1895 skip_bits(&s->gb, 8); /* color primaries */
1896 skip_bits(&s->gb, 8); /* transfer_characteristics */
1897 skip_bits(&s->gb, 8); /* matrix_coefficients */
1899 w= get_bits(&s->gb, 14);
1900 skip_bits(&s->gb, 1); //marker
1901 h= get_bits(&s->gb, 14);
1902 skip_bits(&s->gb, 1); //marker
1904 s1->pan_scan.width= 16*w;
1905 s1->pan_scan.height=16*h;
1907 if(s->aspect_ratio_info > 1)
1908 s->avctx->sample_aspect_ratio=
1910 mpeg2_aspect[s->aspect_ratio_info],
1914 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1915 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1918 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1920 MpegEncContext *s= &s1->mpeg_enc_ctx;
1923 for(i=0; i<1; i++){ //FIXME count
1924 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1925 skip_bits(&s->gb, 1); //marker
1926 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1927 skip_bits(&s->gb, 1); //marker
1930 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1931 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1932 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1933 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1934 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1938 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1942 dprintf("matrix extension\n");
1944 if (get_bits1(&s->gb)) {
1946 v = get_bits(&s->gb, 8);
1947 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1948 s->intra_matrix[j] = v;
1949 s->chroma_intra_matrix[j] = v;
1952 if (get_bits1(&s->gb)) {
1954 v = get_bits(&s->gb, 8);
1955 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1956 s->inter_matrix[j] = v;
1957 s->chroma_inter_matrix[j] = v;
1960 if (get_bits1(&s->gb)) {
1962 v = get_bits(&s->gb, 8);
1963 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1964 s->chroma_intra_matrix[j] = v;
1967 if (get_bits1(&s->gb)) {
1969 v = get_bits(&s->gb, 8);
1970 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1971 s->chroma_inter_matrix[j] = v;
1976 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
1978 s->full_pel[0] = s->full_pel[1] = 0;
1979 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1980 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1981 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1982 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1983 s->intra_dc_precision = get_bits(&s->gb, 2);
1984 s->picture_structure = get_bits(&s->gb, 2);
1985 s->top_field_first = get_bits1(&s->gb);
1986 s->frame_pred_frame_dct = get_bits1(&s->gb);
1987 s->concealment_motion_vectors = get_bits1(&s->gb);
1988 s->q_scale_type = get_bits1(&s->gb);
1989 s->intra_vlc_format = get_bits1(&s->gb);
1990 s->alternate_scan = get_bits1(&s->gb);
1991 s->repeat_first_field = get_bits1(&s->gb);
1992 s->chroma_420_type = get_bits1(&s->gb);
1993 s->progressive_frame = get_bits1(&s->gb);
1995 if(s->picture_structure == PICT_FRAME)
1998 s->first_field ^= 1;
1999 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
2002 if(s->alternate_scan){
2003 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
2004 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
2006 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
2007 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
2010 /* composite display not parsed */
2011 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
2012 dprintf("picture_structure=%d\n", s->picture_structure);
2013 dprintf("top field first=%d\n", s->top_field_first);
2014 dprintf("repeat first field=%d\n", s->repeat_first_field);
2015 dprintf("conceal=%d\n", s->concealment_motion_vectors);
2016 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
2017 dprintf("alternate_scan=%d\n", s->alternate_scan);
2018 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2019 dprintf("progressive_frame=%d\n", s->progressive_frame);
2022 static void mpeg_decode_extension(AVCodecContext *avctx,
2023 uint8_t *buf, int buf_size)
2025 Mpeg1Context *s1 = avctx->priv_data;
2026 MpegEncContext *s = &s1->mpeg_enc_ctx;
2029 init_get_bits(&s->gb, buf, buf_size*8);
2031 ext_type = get_bits(&s->gb, 4);
2034 mpeg_decode_sequence_extension(s);
2037 mpeg_decode_sequence_display_extension(s1);
2040 mpeg_decode_quant_matrix_extension(s);
2043 mpeg_decode_picture_display_extension(s1);
2046 mpeg_decode_picture_coding_extension(s);
2051 static void exchange_uv(MpegEncContext *s){
2054 tmp = s->pblocks[4];
2055 s->pblocks[4] = s->pblocks[5];
2056 s->pblocks[5] = tmp;
2059 static int mpeg_field_start(MpegEncContext *s){
2060 AVCodecContext *avctx= s->avctx;
2061 Mpeg1Context *s1 = (Mpeg1Context*)s;
2063 /* start frame decoding */
2064 if(s->first_field || s->picture_structure==PICT_FRAME){
2065 if(MPV_frame_start(s, avctx) < 0)
2068 ff_er_frame_start(s);
2070 /* first check if we must repeat the frame */
2071 s->current_picture_ptr->repeat_pict = 0;
2072 if (s->repeat_first_field) {
2073 if (s->progressive_sequence) {
2074 if (s->top_field_first)
2075 s->current_picture_ptr->repeat_pict = 4;
2077 s->current_picture_ptr->repeat_pict = 2;
2078 } else if (s->progressive_frame) {
2079 s->current_picture_ptr->repeat_pict = 1;
2083 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2084 }else{ //second field
2087 if(!s->current_picture_ptr){
2088 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2093 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2094 if(s->picture_structure == PICT_BOTTOM_FIELD){
2095 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2100 // MPV_frame_start will call this function too,
2101 // but we need to call it on every field
2102 if(s->avctx->xvmc_acceleration)
2103 XVMC_field_start(s,avctx);
2109 #define DECODE_SLICE_ERROR -1
2110 #define DECODE_SLICE_OK 0
2113 * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode
2114 * @return DECODE_SLICE_ERROR if the slice is damaged<br>
2115 * DECODE_SLICE_OK if this slice is ok<br>
2117 static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
2118 uint8_t **buf, int buf_size)
2120 MpegEncContext *s = &s1->mpeg_enc_ctx;
2121 AVCodecContext *avctx= s->avctx;
2123 const int field_pic= s->picture_structure != PICT_FRAME;
2128 if (mb_y >= s->mb_height){
2129 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", s->mb_y, s->mb_height);
2133 init_get_bits(&s->gb, *buf, buf_size*8);
2135 ff_mpeg1_clean_buffers(s);
2136 s->interlaced_dct = 0;
2138 s->qscale = get_qscale(s);
2141 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2145 /* extra slice info */
2146 while (get_bits1(&s->gb) != 0) {
2147 skip_bits(&s->gb, 8);
2153 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2155 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2162 /* otherwise, stuffing, nothing to do */
2169 s->resync_mb_x= s->mb_x;
2170 s->resync_mb_y= s->mb_y= mb_y;
2172 ff_init_block_index(s);
2174 if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) {
2175 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2176 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",
2177 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],
2178 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2179 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2180 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2181 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2187 //one 1 we memcpy blocks in xvmcvideo
2188 if(s->avctx->xvmc_acceleration > 1)
2189 XVMC_init_block(s);//set s->block
2192 s->dsp.clear_blocks(s->block[0]);
2194 ret = mpeg_decode_mb(s, s->block);
2195 s->chroma_qscale= s->qscale;
2197 dprintf("ret=%d\n", ret);
2201 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2202 const int wrap = field_pic ? 2*s->block_wrap[0] : s->block_wrap[0];
2203 int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
2204 int motion_x, motion_y, dir, i;
2205 if(field_pic && !s->first_field)
2209 for(dir=0; dir<2; dir++){
2210 if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
2211 motion_x = motion_y = 0;
2212 }else if (s->mv_type == MV_TYPE_16X16){
2213 motion_x = s->mv[dir][0][0];
2214 motion_y = s->mv[dir][0][1];
2215 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2216 motion_x = s->mv[dir][i][0];
2217 motion_y = s->mv[dir][i][1];
2220 s->current_picture.motion_val[dir][xy ][0] = motion_x;
2221 s->current_picture.motion_val[dir][xy ][1] = motion_y;
2222 s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
2223 s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
2233 MPV_decode_mb(s, s->block);
2235 if (++s->mb_x >= s->mb_width) {
2237 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2242 if(s->mb_y<<field_pic >= s->mb_height){
2243 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2245 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2246 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2247 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
2253 ff_init_block_index(s);
2256 /* skip mb handling */
2257 if (s->mb_skip_run == -1) {
2258 /* read again increment */
2261 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2263 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2268 s->mb_skip_run += 33;
2269 }else if(code == 35){
2270 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2271 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2274 goto eos; /* end of slice */
2276 /* otherwise, stuffing, nothing to do */
2278 s->mb_skip_run += code;
2284 eos: // end of slice
2285 *buf += get_bits_count(&s->gb)/8 - 1;
2286 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2290 static int slice_decode_thread(AVCodecContext *c, void *arg){
2291 MpegEncContext *s= arg;
2292 uint8_t *buf= s->gb.buffer;
2293 int mb_y= s->start_mb_y;
2295 s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width;
2298 int start_code, ret;
2300 ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf);
2302 //av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
2303 //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);
2305 if(s->resync_mb_x>=0 && s->resync_mb_y>=0)
2306 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);
2308 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);
2311 if(s->mb_y == s->end_mb_y)
2314 start_code = find_start_code(&buf, s->gb.buffer_end);
2315 mb_y= start_code - SLICE_MIN_START_CODE;
2316 if(mb_y < 0 || mb_y >= s->end_mb_y)
2320 return 0; //not reached
2324 * handles slice ends.
2325 * @return 1 if it seems to be the last slice of
2327 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2329 Mpeg1Context *s1 = avctx->priv_data;
2330 MpegEncContext *s = &s1->mpeg_enc_ctx;
2332 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2336 if(s->avctx->xvmc_acceleration)
2339 /* end of slice reached */
2340 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2343 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2349 if (s->pict_type == B_TYPE || s->low_delay) {
2350 *pict= *(AVFrame*)s->current_picture_ptr;
2351 ff_print_debug_info(s, pict);
2353 s->picture_number++;
2354 /* latency of 1 frame for I and P frames */
2355 /* XXX: use another variable than picture_number */
2356 if (s->last_picture_ptr != NULL) {
2357 *pict= *(AVFrame*)s->last_picture_ptr;
2358 ff_print_debug_info(s, pict);
2368 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2369 uint8_t *buf, int buf_size)
2371 Mpeg1Context *s1 = avctx->priv_data;
2372 MpegEncContext *s = &s1->mpeg_enc_ctx;
2373 int width, height, i, v, j;
2376 init_get_bits(&s->gb, buf, buf_size*8);
2378 width = get_bits(&s->gb, 12);
2379 height = get_bits(&s->gb, 12);
2380 s->aspect_ratio_info= get_bits(&s->gb, 4);
2381 if (s->aspect_ratio_info == 0)
2383 aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
2384 avctx->sample_aspect_ratio= av_d2q(aspect, 255);
2386 s->frame_rate_index = get_bits(&s->gb, 4);
2387 if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
2389 s->bit_rate = get_bits(&s->gb, 18) * 400;
2390 if (get_bits1(&s->gb) == 0) /* marker */
2392 if (width <= 0 || height <= 0 ||
2393 (width % 2) != 0 || (height % 2) != 0)
2395 if (width != s->width ||
2396 height != s->height) {
2397 /* start new mpeg1 context decoding */
2398 s->out_format = FMT_MPEG1;
2399 if (s1->mpeg_enc_ctx_allocated) {
2404 avctx->has_b_frames= 1;
2405 avctx->width = width;
2406 avctx->height = height;
2407 avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
2408 avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
2409 avctx->bit_rate = s->bit_rate;
2411 if(avctx->xvmc_acceleration){
2412 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2414 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2417 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2418 if( avctx->idct_algo == FF_IDCT_AUTO )
2419 avctx->idct_algo = FF_IDCT_SIMPLE;
2421 if (MPV_common_init(s) < 0)
2423 s1->mpeg_enc_ctx_allocated = 1;
2424 s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
2427 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2428 skip_bits(&s->gb, 1);
2431 if (get_bits1(&s->gb)) {
2433 v = get_bits(&s->gb, 8);
2435 av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
2438 j = s->intra_scantable.permutated[i];
2439 s->intra_matrix[j] = v;
2440 s->chroma_intra_matrix[j] = v;
2443 dprintf("intra matrix present\n");
2445 dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
2450 int j= s->dsp.idct_permutation[i];
2451 v = ff_mpeg1_default_intra_matrix[i];
2452 s->intra_matrix[j] = v;
2453 s->chroma_intra_matrix[j] = v;
2456 if (get_bits1(&s->gb)) {
2458 v = get_bits(&s->gb, 8);
2460 av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
2463 j = s->intra_scantable.permutated[i];
2464 s->inter_matrix[j] = v;
2465 s->chroma_inter_matrix[j] = v;
2468 dprintf("non intra matrix present\n");
2470 dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
2475 int j= s->dsp.idct_permutation[i];
2476 v = ff_mpeg1_default_non_intra_matrix[i];
2477 s->inter_matrix[j] = v;
2478 s->chroma_inter_matrix[j] = v;
2482 if(show_bits(&s->gb, 23) != 0){
2483 av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
2487 /* we set mpeg2 parameters so that it emulates mpeg1 */
2488 s->progressive_sequence = 1;
2489 s->progressive_frame = 1;
2490 s->picture_structure = PICT_FRAME;
2491 s->frame_pred_frame_dct = 1;
2492 s->chroma_format = 1;
2493 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2494 avctx->sub_id = 1; /* indicates mpeg1 */
2495 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2497 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2498 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2499 s->avctx->rc_buffer_size, s->bit_rate);
2504 static int vcr2_init_sequence(AVCodecContext *avctx)
2506 Mpeg1Context *s1 = avctx->priv_data;
2507 MpegEncContext *s = &s1->mpeg_enc_ctx;
2510 /* start new mpeg1 context decoding */
2511 s->out_format = FMT_MPEG1;
2512 if (s1->mpeg_enc_ctx_allocated) {
2515 s->width = avctx->width;
2516 s->height = avctx->height;
2517 avctx->has_b_frames= 0; //true?
2520 if(avctx->xvmc_acceleration){
2521 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
2523 avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
2526 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2527 if( avctx->idct_algo == FF_IDCT_AUTO )
2528 avctx->idct_algo = FF_IDCT_SIMPLE;
2530 if (MPV_common_init(s) < 0)
2532 exchange_uv(s);//common init reset pblocks, so we swap them here
2533 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2534 s1->mpeg_enc_ctx_allocated = 1;
2537 int j= s->dsp.idct_permutation[i];
2538 v = ff_mpeg1_default_intra_matrix[i];
2539 s->intra_matrix[j] = v;
2540 s->chroma_intra_matrix[j] = v;
2542 v = ff_mpeg1_default_non_intra_matrix[i];
2543 s->inter_matrix[j] = v;
2544 s->chroma_inter_matrix[j] = v;
2547 s->progressive_sequence = 1;
2548 s->progressive_frame = 1;
2549 s->picture_structure = PICT_FRAME;
2550 s->frame_pred_frame_dct = 1;
2551 s->chroma_format = 1;
2552 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2553 avctx->sub_id = 2; /* indicates mpeg2 */
2558 static void mpeg_decode_user_data(AVCodecContext *avctx,
2559 const uint8_t *buf, int buf_size)
2566 /* we parse the DTG active format information */
2568 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2582 avctx->dtg_active_format = p[0] & 0x0f;
2587 static void mpeg_decode_gop(AVCodecContext *avctx,
2588 uint8_t *buf, int buf_size){
2589 Mpeg1Context *s1 = avctx->priv_data;
2590 MpegEncContext *s = &s1->mpeg_enc_ctx;
2592 int drop_frame_flag;
2593 int time_code_hours, time_code_minutes;
2594 int time_code_seconds, time_code_pictures;
2599 init_get_bits(&s->gb, buf, buf_size*8);
2601 drop_frame_flag = get_bits1(&s->gb);
2603 time_code_hours=get_bits(&s->gb,5);
2604 time_code_minutes = get_bits(&s->gb,6);
2605 skip_bits1(&s->gb);//marker bit
2606 time_code_seconds = get_bits(&s->gb,6);
2607 time_code_pictures = get_bits(&s->gb,6);
2608 /*broken_link indicate that after editing the
2609 reference frames of the first B-Frames after GOP I-Frame
2610 are missing (open gop)*/
2611 broken_link = get_bits1(&s->gb);
2612 if(broken_link == 1){
2613 // avcodec_flush_buffers(avctx);
2614 ff_mpeg_flush(avctx);
2619 * finds the end of the current frame in the bitstream.
2620 * @return the position of the first byte of the next frame, or -1
2622 static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
2623 ParseContext *pc= &s->parse_context;
2630 if(!pc->frame_start_found){
2631 for(i=0; i<buf_size; i++){
2632 state= (state<<8) | buf[i];
2633 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2635 pc->frame_start_found=1;
2641 if(pc->frame_start_found){
2642 for(; i<buf_size; i++){
2643 state= (state<<8) | buf[i];
2644 if((state&0xFFFFFF00) == 0x100){
2645 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2646 pc->frame_start_found=0;
2654 return END_NOT_FOUND;
2657 /* handle buffering and image synchronisation */
2658 static int mpeg_decode_frame(AVCodecContext *avctx,
2659 void *data, int *data_size,
2660 uint8_t *buf, int buf_size)
2662 Mpeg1Context *s = avctx->priv_data;
2663 uint8_t *buf_end, *buf_ptr;
2664 int ret, start_code, input_size;
2665 AVFrame *picture = data;
2666 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2667 dprintf("fill_buffer\n");
2671 /* special case for last picture */
2672 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2673 *picture= *(AVFrame*)s2->next_picture_ptr;
2674 s2->next_picture_ptr= NULL;
2676 *data_size = sizeof(AVFrame);
2680 if(s2->flags&CODEC_FLAG_TRUNCATED){
2681 int next= mpeg1_find_frame_end(s2, buf, buf_size);
2683 if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
2688 buf_end = buf + buf_size;
2691 if (s->repeat_field % 2 == 1) {
2693 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2694 // s2->picture_number, s->repeat_field);
2695 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2696 *data_size = sizeof(AVPicture);
2702 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2703 vcr2_init_sequence(avctx);
2708 /* find start next code */
2709 start_code = find_start_code(&buf_ptr, buf_end);
2710 if (start_code < 0){
2711 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
2712 if(avctx->thread_count > 1){
2715 avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count);
2716 for(i=0; i<s->slice_count; i++)
2717 s2->error_count += s2->thread_context[i]->error_count;
2719 if (slice_end(avctx, picture)) {
2720 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2721 *data_size = sizeof(AVPicture);
2724 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2727 input_size = buf_end - buf_ptr;
2729 if(avctx->debug & FF_DEBUG_STARTCODE){
2730 av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
2733 /* prepare data for next start code */
2734 switch(start_code) {
2735 case SEQ_START_CODE:
2736 mpeg1_decode_sequence(avctx, buf_ptr,
2740 case PICTURE_START_CODE:
2741 /* we have a complete image : we try to decompress it */
2742 mpeg1_decode_picture(avctx,
2743 buf_ptr, input_size);
2745 case EXT_START_CODE:
2746 mpeg_decode_extension(avctx,
2747 buf_ptr, input_size);
2749 case USER_START_CODE:
2750 mpeg_decode_user_data(avctx,
2751 buf_ptr, input_size);
2753 case GOP_START_CODE:
2754 mpeg_decode_gop(avctx, buf_ptr, input_size);
2757 if (start_code >= SLICE_MIN_START_CODE &&
2758 start_code <= SLICE_MAX_START_CODE) {
2759 int mb_y= start_code - SLICE_MIN_START_CODE;
2761 /* skip b frames if we dont have reference frames */
2762 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
2763 /* skip b frames if we are in a hurry */
2764 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2765 /* skip everything if we are in a hurry>=5 */
2766 if(avctx->hurry_up>=5) break;
2768 if (!s->mpeg_enc_ctx_allocated) break;
2770 if(s2->first_slice){
2772 if(mpeg_field_start(s2) < 0)
2776 if(avctx->thread_count > 1){
2777 int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count;
2778 if(threshold <= mb_y){
2779 MpegEncContext *thread_context= s2->thread_context[s->slice_count];
2781 thread_context->start_mb_y= mb_y;
2782 thread_context->end_mb_y = s2->mb_height;
2784 s2->thread_context[s->slice_count-1]->end_mb_y= mb_y;
2785 ff_update_duplicate_context(thread_context, s2);
2787 init_get_bits(&thread_context->gb, buf_ptr, input_size*8);
2790 buf_ptr += 2; //FIXME add minimum num of bytes per slice
2792 ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size);
2796 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2797 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);
2799 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);
2808 static int mpeg_decode_end(AVCodecContext *avctx)
2810 Mpeg1Context *s = avctx->priv_data;
2812 if (s->mpeg_enc_ctx_allocated)
2813 MPV_common_end(&s->mpeg_enc_ctx);
2817 AVCodec mpeg1video_decoder = {
2820 CODEC_ID_MPEG1VIDEO,
2821 sizeof(Mpeg1Context),
2826 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2827 .flush= ff_mpeg_flush,
2830 AVCodec mpeg2video_decoder = {
2833 CODEC_ID_MPEG2VIDEO,
2834 sizeof(Mpeg1Context),
2839 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2840 .flush= ff_mpeg_flush,
2844 AVCodec mpegvideo_decoder = {
2847 CODEC_ID_MPEG2VIDEO,
2848 sizeof(Mpeg1Context),
2853 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2854 .flush= ff_mpeg_flush,
2857 #ifdef CONFIG_ENCODERS
2859 AVCodec mpeg1video_encoder = {
2862 CODEC_ID_MPEG1VIDEO,
2863 sizeof(MpegEncContext),
2867 .supported_framerates= frame_rate_tab+1,
2872 AVCodec mpeg2video_encoder = {
2875 CODEC_ID_MPEG2VIDEO,
2876 sizeof(MpegEncContext),
2880 .supported_framerates= frame_rate_tab+1,
2886 static int mpeg_mc_decode_init(AVCodecContext *avctx){
2889 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2891 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2892 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2894 mpeg_decode_init(avctx);
2895 s = avctx->priv_data;
2897 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2898 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2903 AVCodec mpeg_xvmc_decoder = {
2906 CODEC_ID_MPEG2VIDEO_XVMC,
2907 sizeof(Mpeg1Context),
2908 mpeg_mc_decode_init,
2912 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL,
2913 .flush= ff_mpeg_flush,
2918 /* this is ugly i know, but the alternative is too make
2919 hundreds of vars global and prefix them with ff_mpeg1_
2920 which is far uglier. */