2 * MPEG1 codec / MPEG2 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include "mpegvideo.h"
30 #include "mpeg12data.h"
37 #define SEQ_END_CODE 0x000001b7
38 #define SEQ_START_CODE 0x000001b3
39 #define GOP_START_CODE 0x000001b8
40 #define PICTURE_START_CODE 0x00000100
41 #define SLICE_MIN_START_CODE 0x00000101
42 #define SLICE_MAX_START_CODE 0x000001af
43 #define EXT_START_CODE 0x000001b5
44 #define USER_START_CODE 0x000001b2
48 #define MBINCR_VLC_BITS 9
49 #define MB_PAT_VLC_BITS 9
50 #define MB_PTYPE_VLC_BITS 6
51 #define MB_BTYPE_VLC_BITS 6
52 #define TEX_VLC_BITS 9
54 #ifdef CONFIG_ENCODERS
55 static void mpeg1_encode_block(MpegEncContext *s,
58 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
59 #endif //CONFIG_ENCODERS
60 static void mpeg1_skip_picture(MpegEncContext *s, int pict_num);
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 #ifdef CONFIG_ENCODERS
84 static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
85 static uint8_t fcode_tab[MAX_MV*2+1];
87 static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
88 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
90 /* simple include everything table for dc, first byte is bits number next 3 are code*/
91 static uint32_t mpeg1_lum_dc_uni[512];
92 static uint32_t mpeg1_chr_dc_uni[512];
94 static uint8_t mpeg1_index_run[2][64];
95 static int8_t mpeg1_max_level[2][64];
96 #endif //CONFIG_ENCODERS
98 static void init_2d_vlc_rl(RLTable *rl)
102 init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2,
103 &rl->table_vlc[0][1], 4, 2,
104 &rl->table_vlc[0][0], 4, 2);
107 rl->rl_vlc[0]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
108 for(i=0; i<rl->vlc.table_size; i++){
109 int code= rl->vlc.table[i][0];
110 int len = rl->vlc.table[i][1];
113 if(len==0){ // illegal code
116 }else if(len<0){ //more bits needed
120 if(code==rl->n){ //esc
123 }else if(code==rl->n+1){ //eob
127 run= rl->table_run [code] + 1;
128 level= rl->table_level[code];
131 rl->rl_vlc[0][i].len= len;
132 rl->rl_vlc[0][i].level= level;
133 rl->rl_vlc[0][i].run= run;
137 #ifdef CONFIG_ENCODERS
138 static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
141 for(i=0; i<128; i++){
144 for(run=0; run<64; run++){
147 int alevel= ABS(level);
148 int sign= (level>>31)&1;
150 if (alevel > rl->max_level[0][run])
153 code= rl->index_run[0][run] + alevel - 1;
155 if (code < 111 /* rl->n */) {
156 /* store the vlc & sign at once */
157 len= mpeg1_vlc[code][1]+1;
158 bits= (mpeg1_vlc[code][0]<<1) + sign;
160 len= mpeg1_vlc[111/*rl->n*/][1]+6;
161 bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
171 bits|= 0x8001 + level + 255;
173 bits|= level & 0xffff;
178 uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
179 uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
184 static void put_header(MpegEncContext *s, int header)
186 align_put_bits(&s->pb);
187 put_bits(&s->pb, 16, header>>16);
188 put_bits(&s->pb, 16, header&0xFFFF);
191 /* put sequence header if needed */
192 static void mpeg1_encode_sequence_header(MpegEncContext *s)
194 unsigned int vbv_buffer_size;
198 float best_aspect_error= 1E10;
199 float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
200 int constraint_parameter_flag;
202 if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
204 if (s->current_picture.key_frame) {
205 /* mpeg1 header repeated every gop */
206 put_header(s, SEQ_START_CODE);
208 /* search closest frame rate */
211 s->frame_rate_index = 0;
214 if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
216 d = abs(MPEG1_FRAME_RATE_BASE*(int64_t)s->avctx->frame_rate/s->avctx->frame_rate_base - frame_rate_tab[i]);
219 s->frame_rate_index = i;
224 put_bits(&s->pb, 12, s->width);
225 put_bits(&s->pb, 12, s->height);
228 float error= aspect_ratio;
229 if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
230 error-= 1.0/mpeg1_aspect[i];
232 error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
236 if(error < best_aspect_error){
237 best_aspect_error= error;
238 s->aspect_ratio_info= i;
242 put_bits(&s->pb, 4, s->aspect_ratio_info);
243 put_bits(&s->pb, 4, s->frame_rate_index);
245 if(s->avctx->rc_max_rate){
246 v = (s->avctx->rc_max_rate + 399) / 400;
247 if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
253 if(s->avctx->rc_buffer_size)
254 vbv_buffer_size = s->avctx->rc_buffer_size;
256 /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
257 vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
258 vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
260 put_bits(&s->pb, 18, v & 0x3FFFF);
261 put_bits(&s->pb, 1, 1); /* marker */
262 put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
264 constraint_parameter_flag=
265 s->width <= 768 && s->height <= 576 &&
266 s->mb_width * s->mb_height <= 396 &&
267 s->mb_width * s->mb_height * frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*396*25 &&
268 frame_rate_tab[s->frame_rate_index] <= MPEG1_FRAME_RATE_BASE*30 &&
269 vbv_buffer_size <= 20 &&
271 s->codec_id == CODEC_ID_MPEG1VIDEO;
273 put_bits(&s->pb, 1, constraint_parameter_flag);
275 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
276 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
278 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
279 put_header(s, EXT_START_CODE);
280 put_bits(&s->pb, 4, 1); //seq ext
281 put_bits(&s->pb, 1, 0); //esc
282 put_bits(&s->pb, 3, 4); //profile
283 put_bits(&s->pb, 4, 8); //level
284 put_bits(&s->pb, 1, s->progressive_sequence);
285 put_bits(&s->pb, 2, 1); //chroma format 4:2:0
286 put_bits(&s->pb, 2, 0); //horizontal size ext
287 put_bits(&s->pb, 2, 0); //vertical size ext
288 put_bits(&s->pb, 12, v>>18); //bitrate ext
289 put_bits(&s->pb, 1, 1); //marker
290 put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
291 put_bits(&s->pb, 1, s->low_delay);
292 put_bits(&s->pb, 2, 0); // frame_rate_ext_n
293 put_bits(&s->pb, 5, 0); // frame_rate_ext_d
296 put_header(s, GOP_START_CODE);
297 put_bits(&s->pb, 1, 0); /* do drop frame */
298 /* time code : we must convert from the real frame rate to a
299 fake mpeg frame rate in case of low frame rate */
300 fps = (frame_rate_tab[s->frame_rate_index] + MPEG1_FRAME_RATE_BASE/2)/ MPEG1_FRAME_RATE_BASE;
301 time_code = s->fake_picture_number;
302 s->gop_picture_number = s->fake_picture_number;
303 put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
304 put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
305 put_bits(&s->pb, 1, 1);
306 put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
307 put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
308 put_bits(&s->pb, 1, 0); /* closed gop */
309 put_bits(&s->pb, 1, 0); /* broken link */
312 if (s->avctx->frame_rate < (23 * s->avctx->frame_rate_base) && s->picture_number > 0) {
313 /* insert empty P pictures to slow down to the desired
314 frame rate. Each fake pictures takes about 20 bytes */
315 fps = frame_rate_tab[s->frame_rate_index];
316 n = av_rescale((int64_t)s->picture_number * s->avctx->frame_rate_base, fps, s->avctx->frame_rate) / MPEG1_FRAME_RATE_BASE - 1;
317 while (s->fake_picture_number < n) {
318 mpeg1_skip_picture(s, s->fake_picture_number -
319 s->gop_picture_number);
320 s->fake_picture_number++;
326 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
328 put_bits(&s->pb, 11, 0x008);
331 put_bits(&s->pb, mbAddrIncrTable[run][1],
332 mbAddrIncrTable[run][0]);
335 /* insert a fake P picture */
336 static void mpeg1_skip_picture(MpegEncContext *s, int pict_num)
338 assert(s->codec_id == CODEC_ID_MPEG1VIDEO); // mpeg2 can do these repeat things
340 /* mpeg1 picture header */
341 put_header(s, PICTURE_START_CODE);
342 /* temporal reference */
343 put_bits(&s->pb, 10, pict_num & 0x3ff);
345 put_bits(&s->pb, 3, P_TYPE);
346 put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
348 put_bits(&s->pb, 1, 1); /* integer coordinates */
349 put_bits(&s->pb, 3, 1); /* forward_f_code */
351 put_bits(&s->pb, 1, 0); /* extra bit picture */
354 put_header(s, SLICE_MIN_START_CODE);
355 put_bits(&s->pb, 5, 1); /* quantizer scale */
356 put_bits(&s->pb, 1, 0); /* slice extra information */
358 encode_mb_skip_run(s, 0);
360 /* empty macroblock */
361 put_bits(&s->pb, 3, 1); /* motion only */
363 /* zero motion x & y */
364 put_bits(&s->pb, 1, 1);
365 put_bits(&s->pb, 1, 1);
367 /* output a number of empty slice */
368 encode_mb_skip_run(s, s->mb_width * s->mb_height - 2);
370 /* empty macroblock */
371 put_bits(&s->pb, 3, 1); /* motion only */
373 /* zero motion x & y */
374 put_bits(&s->pb, 1, 1);
375 put_bits(&s->pb, 1, 1);
377 #endif //CONFIG_ENCODERS
379 static void common_init(MpegEncContext *s)
382 s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
385 void ff_mpeg1_clean_buffers(MpegEncContext *s){
386 s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
387 s->last_dc[1] = s->last_dc[0];
388 s->last_dc[2] = s->last_dc[0];
389 memset(s->last_mv, 0, sizeof(s->last_mv));
392 #ifdef CONFIG_ENCODERS
394 void ff_mpeg1_encode_slice_header(MpegEncContext *s){
395 put_header(s, SLICE_MIN_START_CODE + s->mb_y);
396 put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
397 put_bits(&s->pb, 1, 0); /* slice extra information */
400 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
402 mpeg1_encode_sequence_header(s);
404 /* mpeg1 picture header */
405 put_header(s, PICTURE_START_CODE);
406 /* temporal reference */
408 // RAL: s->picture_number instead of s->fake_picture_number
409 put_bits(&s->pb, 10, (s->picture_number -
410 s->gop_picture_number) & 0x3ff);
411 s->fake_picture_number++;
413 put_bits(&s->pb, 3, s->pict_type);
415 s->vbv_delay_ptr= s->pb.buf + get_bit_count(&s->pb)/8;
416 put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
418 // RAL: Forward f_code also needed for B frames
419 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
420 put_bits(&s->pb, 1, 0); /* half pel coordinates */
421 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
422 put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
424 put_bits(&s->pb, 3, 7); /* forward_f_code */
427 // RAL: Backward f_code necessary for B frames
428 if (s->pict_type == B_TYPE) {
429 put_bits(&s->pb, 1, 0); /* half pel coordinates */
430 if(s->codec_id == CODEC_ID_MPEG1VIDEO)
431 put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
433 put_bits(&s->pb, 3, 7); /* backward_f_code */
436 put_bits(&s->pb, 1, 0); /* extra bit picture */
438 s->frame_pred_frame_dct = 1;
439 if(s->codec_id == CODEC_ID_MPEG2VIDEO){
440 put_header(s, EXT_START_CODE);
441 put_bits(&s->pb, 4, 8); //pic ext
442 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
443 put_bits(&s->pb, 4, s->f_code);
444 put_bits(&s->pb, 4, s->f_code);
446 put_bits(&s->pb, 8, 255);
448 if (s->pict_type == B_TYPE) {
449 put_bits(&s->pb, 4, s->b_code);
450 put_bits(&s->pb, 4, s->b_code);
452 put_bits(&s->pb, 8, 255);
454 put_bits(&s->pb, 2, s->intra_dc_precision);
455 put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME);
456 if (s->progressive_sequence) {
457 put_bits(&s->pb, 1, 0); /* no repeat */
459 put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
461 /* XXX: optimize the generation of this flag with entropy
463 s->frame_pred_frame_dct = s->progressive_sequence;
465 put_bits(&s->pb, 1, s->frame_pred_frame_dct);
466 put_bits(&s->pb, 1, s->concealment_motion_vectors);
467 put_bits(&s->pb, 1, s->q_scale_type);
468 put_bits(&s->pb, 1, s->intra_vlc_format);
469 put_bits(&s->pb, 1, s->alternate_scan);
470 put_bits(&s->pb, 1, s->repeat_first_field);
471 put_bits(&s->pb, 1, s->chroma_420_type=1);
472 s->progressive_frame = s->progressive_sequence;
473 put_bits(&s->pb, 1, s->progressive_frame);
474 put_bits(&s->pb, 1, 0); //composite_display_flag
476 if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
479 put_header(s, USER_START_CODE);
480 for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
481 put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
486 ff_mpeg1_encode_slice_header(s);
489 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
490 int has_mv, int field_motion)
492 put_bits(&s->pb, n, bits);
493 if (!s->frame_pred_frame_dct) {
495 put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
496 put_bits(&s->pb, 1, s->interlaced_dct);
500 void mpeg1_encode_mb(MpegEncContext *s,
501 DCTELEM block[6][64],
502 int motion_x, int motion_y)
505 const int mb_x = s->mb_x;
506 const int mb_y = s->mb_y;
507 const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
512 if (s->block_last_index[i] >= 0)
516 if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
517 ((s->pict_type == P_TYPE && s->mv_type == MV_TYPE_16X16 && (motion_x | motion_y) == 0) ||
518 (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) |
519 ((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))) {
521 s->qscale -= s->dquant;
525 if(s->pict_type == P_TYPE){
526 s->last_mv[0][1][0]= s->last_mv[0][0][0]=
527 s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
531 assert(s->mb_skip_run == 0);
532 encode_mb_skip_run(s, s->mb_x);
534 encode_mb_skip_run(s, s->mb_skip_run);
537 if (s->pict_type == I_TYPE) {
538 if(s->dquant && cbp){
539 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
540 put_bits(&s->pb, 5, s->qscale);
542 put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
543 s->qscale -= s->dquant;
545 s->misc_bits+= get_bits_diff(s);
547 } else if (s->mb_intra) {
548 if(s->dquant && cbp){
549 put_mb_modes(s, 6, 0x01, 0, 0);
550 put_bits(&s->pb, 5, s->qscale);
552 put_mb_modes(s, 5, 0x03, 0, 0);
553 s->qscale -= s->dquant;
555 s->misc_bits+= get_bits_diff(s);
557 memset(s->last_mv, 0, sizeof(s->last_mv));
558 } else if (s->pict_type == P_TYPE) {
559 if(s->mv_type == MV_TYPE_16X16){
561 if ((motion_x|motion_y) == 0) {
563 put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
564 put_bits(&s->pb, 5, s->qscale);
566 put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
568 s->misc_bits+= get_bits_diff(s);
571 put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
572 put_bits(&s->pb, 5, s->qscale);
574 put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
576 s->misc_bits+= get_bits_diff(s);
577 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
578 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
579 s->mv_bits+= get_bits_diff(s);
582 put_bits(&s->pb, 3, 1); /* motion only */
583 if (!s->frame_pred_frame_dct)
584 put_bits(&s->pb, 2, 2); /* motion_type: frame */
585 s->misc_bits+= get_bits_diff(s);
586 mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
587 mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
588 s->qscale -= s->dquant;
589 s->mv_bits+= get_bits_diff(s);
591 s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
592 s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
594 assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
598 put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
599 put_bits(&s->pb, 5, s->qscale);
601 put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
604 put_bits(&s->pb, 3, 1); /* motion only */
605 put_bits(&s->pb, 2, 1); /* motion_type: field */
606 s->qscale -= s->dquant;
608 s->misc_bits+= get_bits_diff(s);
610 put_bits(&s->pb, 1, s->field_select[0][i]);
611 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
612 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
613 s->last_mv[0][i][0]= s->mv[0][i][0];
614 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
616 s->mv_bits+= get_bits_diff(s);
619 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
622 static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
624 if(s->mv_type == MV_TYPE_16X16){
625 if (cbp){ // With coded bloc pattern
627 if(s->mv_dir == MV_DIR_FORWARD)
628 put_mb_modes(s, 6, 3, 1, 0);
630 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
631 put_bits(&s->pb, 5, s->qscale);
633 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
635 }else{ // No coded bloc pattern
636 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
637 if (!s->frame_pred_frame_dct)
638 put_bits(&s->pb, 2, 2); /* motion_type: frame */
639 s->qscale -= s->dquant;
641 s->misc_bits += get_bits_diff(s);
642 if (s->mv_dir&MV_DIR_FORWARD){
643 mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
644 mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
645 s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
646 s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
649 if (s->mv_dir&MV_DIR_BACKWARD){
650 mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
651 mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
652 s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
653 s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
657 assert(s->mv_type == MV_TYPE_FIELD);
658 assert(!s->frame_pred_frame_dct);
659 if (cbp){ // With coded bloc pattern
661 if(s->mv_dir == MV_DIR_FORWARD)
662 put_mb_modes(s, 6, 3, 1, 1);
664 put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
665 put_bits(&s->pb, 5, s->qscale);
667 put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
669 }else{ // No coded bloc pattern
670 put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
671 put_bits(&s->pb, 2, 1); /* motion_type: field */
672 s->qscale -= s->dquant;
674 s->misc_bits += get_bits_diff(s);
675 if (s->mv_dir&MV_DIR_FORWARD){
677 put_bits(&s->pb, 1, s->field_select[0][i]);
678 mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
679 mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
680 s->last_mv[0][i][0]= s->mv[0][i][0];
681 s->last_mv[0][i][1]= 2*s->mv[0][i][1];
685 if (s->mv_dir&MV_DIR_BACKWARD){
687 put_bits(&s->pb, 1, s->field_select[1][i]);
688 mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
689 mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
690 s->last_mv[1][i][0]= s->mv[1][i][0];
691 s->last_mv[1][i][1]= 2*s->mv[1][i][1];
696 s->mv_bits += get_bits_diff(s);
698 put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
701 if (cbp & (1 << (5 - i))) {
702 mpeg1_encode_block(s, block[i], i);
707 s->i_tex_bits+= get_bits_diff(s);
709 s->p_tex_bits+= get_bits_diff(s);
713 // RAL: Parameter added: f_or_b_code
714 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
716 int code, bit_size, l, m, bits, range, sign;
722 mbMotionVectorTable[0][1],
723 mbMotionVectorTable[0][0]);
725 bit_size = f_or_b_code - 1;
726 range = 1 << bit_size;
727 /* modulo encoding */
732 } else if (val >= l) {
738 code = (val >> bit_size) + 1;
739 bits = val & (range - 1);
744 code = (val >> bit_size) + 1;
745 bits = val & (range - 1);
749 assert(code > 0 && code <= 16);
752 mbMotionVectorTable[code][1],
753 mbMotionVectorTable[code][0]);
755 put_bits(&s->pb, 1, sign);
757 put_bits(&s->pb, bit_size, bits);
762 void ff_mpeg1_encode_init(MpegEncContext *s)
778 mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
779 mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
782 init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
784 /* build unified dc encoding tables */
785 for(i=-255; i<256; i++)
793 index = vlc_dc_table[adiff];
795 bits= vlc_dc_lum_bits[index] + index;
796 code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
797 mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
799 bits= vlc_dc_chroma_bits[index] + index;
800 code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
801 mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
804 mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
806 for(f_code=1; f_code<=MAX_FCODE; f_code++){
807 for(mv=-MAX_MV; mv<=MAX_MV; mv++){
810 if(mv==0) len= mbMotionVectorTable[0][1];
812 int val, bit_size, range, code;
814 bit_size = s->f_code - 1;
815 range = 1 << bit_size;
821 code = (val >> bit_size) + 1;
823 len= mbMotionVectorTable[code][1] + 1 + bit_size;
825 len= mbMotionVectorTable[16][1] + 2 + bit_size;
829 mv_penalty[f_code][mv+MAX_MV]= len;
834 for(f_code=MAX_FCODE; f_code>0; f_code--){
835 for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
836 fcode_tab[mv+MAX_MV]= f_code;
840 s->me.mv_penalty= mv_penalty;
841 s->fcode_tab= fcode_tab;
842 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
849 s->intra_ac_vlc_length=
850 s->inter_ac_vlc_length=
851 s->intra_ac_vlc_last_length=
852 s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
855 static inline void encode_dc(MpegEncContext *s, int diff, int component)
857 if (component == 0) {
860 mpeg1_lum_dc_uni[diff+255]&0xFF,
861 mpeg1_lum_dc_uni[diff+255]>>8);
865 mpeg1_chr_dc_uni[diff+255]&0xFF,
866 mpeg1_chr_dc_uni[diff+255]>>8);
870 static void mpeg1_encode_block(MpegEncContext *s,
874 int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
876 // RLTable *rl = &rl_mpeg1;
878 last_index = s->block_last_index[n];
882 component = (n <= 3 ? 0 : n - 4 + 1);
883 dc = block[0]; /* overflow is impossible */
884 diff = dc - s->last_dc[component];
885 encode_dc(s, diff, component);
886 s->last_dc[component] = dc;
889 if (s->intra_vlc_format)
895 /* encode the first coefficient : needs to be done here because
896 it is handled slightly differently */
898 if (abs(level) == 1) {
899 code = ((uint32_t)level >> 31); /* the sign bit */
900 put_bits(&s->pb, 2, code | 0x02);
909 /* now quantify & encode AC coefs */
910 last_non_zero = i - 1;
912 for(;i<=last_index;i++) {
913 j = s->intra_scantable.permutated[i];
918 dprintf("level[%d]=%d\n", i, level);
920 /* encode using VLC */
922 run = i - last_non_zero - 1;
925 MASK_ABS(sign, alevel)
928 // code = get_rl_index(rl, 0, run, alevel);
929 if (alevel <= mpeg1_max_level[0][run]){
930 code= mpeg1_index_run[0][run] + alevel - 1;
931 /* store the vlc & sign at once */
932 put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
934 /* escape seems to be pretty rare <5% so i dont optimize it */
935 put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
936 /* escape: only clip in this case */
937 put_bits(&s->pb, 6, run);
938 if(s->codec_id == CODEC_ID_MPEG1VIDEO){
940 put_bits(&s->pb, 8, level & 0xff);
943 put_bits(&s->pb, 16, 0x8001 + level + 255);
945 put_bits(&s->pb, 16, level & 0xffff);
949 put_bits(&s->pb, 12, level & 0xfff);
956 put_bits(&s->pb, 2, 0x2);
958 #endif //CONFIG_ENCODERS
960 /******************************************/
963 static VLC dc_lum_vlc;
964 static VLC dc_chroma_vlc;
966 static VLC mbincr_vlc;
967 static VLC mb_ptype_vlc;
968 static VLC mb_btype_vlc;
969 static VLC mb_pat_vlc;
971 static void init_vlcs()
978 init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
979 vlc_dc_lum_bits, 1, 1,
980 vlc_dc_lum_code, 2, 2);
981 init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
982 vlc_dc_chroma_bits, 1, 1,
983 vlc_dc_chroma_code, 2, 2);
984 init_vlc(&mv_vlc, MV_VLC_BITS, 17,
985 &mbMotionVectorTable[0][1], 2, 1,
986 &mbMotionVectorTable[0][0], 2, 1);
987 init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
988 &mbAddrIncrTable[0][1], 2, 1,
989 &mbAddrIncrTable[0][0], 2, 1);
990 init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
991 &mbPatTable[0][1], 2, 1,
992 &mbPatTable[0][0], 2, 1);
994 init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
995 &table_mb_ptype[0][1], 2, 1,
996 &table_mb_ptype[0][0], 2, 1);
997 init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
998 &table_mb_btype[0][1], 2, 1,
999 &table_mb_btype[0][0], 2, 1);
1003 init_2d_vlc_rl(&rl_mpeg1);
1004 init_2d_vlc_rl(&rl_mpeg2);
1008 static inline int get_dmv(MpegEncContext *s)
1010 if(get_bits1(&s->gb))
1011 return 1 - (get_bits1(&s->gb) << 1);
1016 static inline int get_qscale(MpegEncContext *s)
1018 int qscale = get_bits(&s->gb, 5);
1019 if (s->q_scale_type) {
1020 return non_linear_qscale[qscale];
1026 /* motion type (for mpeg2) */
1032 static int mpeg_decode_mb(MpegEncContext *s,
1033 DCTELEM block[6][64])
1035 int i, j, k, cbp, val, mb_type, motion_type;
1037 dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
1039 assert(s->mb_skiped==0);
1041 if (s->mb_skip_run-- != 0) {
1042 if(s->pict_type == I_TYPE){
1043 av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
1050 s->block_last_index[i] = -1;
1051 s->mv_type = MV_TYPE_16X16;
1052 if (s->pict_type == P_TYPE) {
1053 /* if P type, zero motion vector is implied */
1054 s->mv_dir = MV_DIR_FORWARD;
1055 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1056 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1057 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1059 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
1061 /* if B type, reuse previous vectors and directions */
1062 s->mv[0][0][0] = s->last_mv[0][0][0];
1063 s->mv[0][0][1] = s->last_mv[0][0][1];
1064 s->mv[1][0][0] = s->last_mv[1][0][0];
1065 s->mv[1][0][1] = s->last_mv[1][0][1];
1067 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
1068 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
1069 // assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
1071 if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
1078 switch(s->pict_type) {
1081 if (get_bits1(&s->gb) == 0) {
1082 if (get_bits1(&s->gb) == 0){
1083 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y);
1086 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
1088 mb_type = MB_TYPE_INTRA;
1092 mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
1094 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
1097 mb_type = ptype2mb_type[ mb_type ];
1100 mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
1102 av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
1105 mb_type = btype2mb_type[ mb_type ];
1108 dprintf("mb_type=%x\n", mb_type);
1109 // motion_type = 0; /* avoid warning */
1110 if (IS_INTRA(mb_type)) {
1111 /* compute dct type */
1112 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1113 !s->frame_pred_frame_dct) {
1114 s->interlaced_dct = get_bits1(&s->gb);
1117 if (IS_QUANT(mb_type))
1118 s->qscale = get_qscale(s);
1120 if (s->concealment_motion_vectors) {
1121 /* just parse them */
1122 if (s->picture_structure != PICT_FRAME)
1123 skip_bits1(&s->gb); /* field select */
1125 s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] =
1126 mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]);
1127 s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] =
1128 mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]);
1130 skip_bits1(&s->gb); /* marker */
1132 memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
1135 //one 1 we memcpy blocks in xvmcvideo
1136 if(s->avctx->xvmc_acceleration > 1){
1137 XVMC_pack_pblocks(s,-1);//inter are always full blocks
1144 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1146 if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
1151 if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0)
1156 if (mb_type & MB_TYPE_ZERO_MV){
1157 assert(mb_type & MB_TYPE_CBP);
1159 /* compute dct type */
1160 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1161 !s->frame_pred_frame_dct) {
1162 s->interlaced_dct = get_bits1(&s->gb);
1165 if (IS_QUANT(mb_type))
1166 s->qscale = get_qscale(s);
1168 s->mv_dir = MV_DIR_FORWARD;
1169 s->mv_type = MV_TYPE_16X16;
1170 s->last_mv[0][0][0] = 0;
1171 s->last_mv[0][0][1] = 0;
1172 s->last_mv[0][1][0] = 0;
1173 s->last_mv[0][1][1] = 0;
1177 assert(mb_type & MB_TYPE_L0L1);
1178 //FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
1179 /* get additionnal motion vector type */
1180 if (s->frame_pred_frame_dct)
1181 motion_type = MT_FRAME;
1183 motion_type = get_bits(&s->gb, 2);
1186 /* compute dct type */
1187 if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
1188 !s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
1189 s->interlaced_dct = get_bits1(&s->gb);
1192 if (IS_QUANT(mb_type))
1193 s->qscale = get_qscale(s);
1195 /* motion vectors */
1198 if (USES_LIST(mb_type, i)) {
1199 s->mv_dir |= (MV_DIR_FORWARD >> i);
1200 dprintf("motion_type=%d\n", motion_type);
1201 switch(motion_type) {
1202 case MT_FRAME: /* or MT_16X8 */
1203 if (s->picture_structure == PICT_FRAME) {
1205 mb_type |= MB_TYPE_16x16;
1206 s->mv_type = MV_TYPE_16X16;
1207 s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
1208 mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
1209 s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
1210 mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
1211 /* full_pel: only for mpeg1 */
1212 if (s->full_pel[i]){
1213 s->mv[i][0][0] <<= 1;
1214 s->mv[i][0][1] <<= 1;
1218 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1219 s->mv_type = MV_TYPE_16X8;
1221 s->field_select[i][j] = get_bits1(&s->gb);
1223 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1224 s->last_mv[i][j][k]);
1225 s->last_mv[i][j][k] = val;
1226 s->mv[i][j][k] = val;
1232 s->mv_type = MV_TYPE_FIELD;
1233 if (s->picture_structure == PICT_FRAME) {
1234 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1236 s->field_select[i][j] = get_bits1(&s->gb);
1237 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1238 s->last_mv[i][j][0]);
1239 s->last_mv[i][j][0] = val;
1240 s->mv[i][j][0] = val;
1241 dprintf("fmx=%d\n", val);
1242 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1243 s->last_mv[i][j][1] >> 1);
1244 s->last_mv[i][j][1] = val << 1;
1245 s->mv[i][j][1] = val;
1246 dprintf("fmy=%d\n", val);
1249 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1250 s->field_select[i][0] = get_bits1(&s->gb);
1252 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
1253 s->last_mv[i][0][k]);
1254 s->last_mv[i][0][k] = val;
1255 s->last_mv[i][1][k] = val;
1256 s->mv[i][0][k] = val;
1262 int dmx, dmy, mx, my, m;
1264 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
1265 s->last_mv[i][0][0]);
1266 s->last_mv[i][0][0] = mx;
1267 s->last_mv[i][1][0] = mx;
1269 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
1270 s->last_mv[i][0][1] >> 1);
1272 s->mv_type = MV_TYPE_DMV;
1275 s->last_mv[i][0][1] = my<<1;
1276 s->last_mv[i][1][1] = my<<1;
1278 s->mv[i][0][0] = mx;
1279 s->mv[i][0][1] = my;
1280 s->mv[i][1][0] = mx;//not used
1281 s->mv[i][1][1] = my;//not used
1283 if (s->picture_structure == PICT_FRAME) {
1284 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
1286 //m = 1 + 2 * s->top_field_first;
1287 m = s->top_field_first ? 1 : 3;
1289 /* top -> top pred */
1290 s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1291 s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
1293 s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
1294 s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
1296 mb_type |= MB_TYPE_16x16;
1298 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
1299 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
1300 if(s->picture_structure == PICT_TOP_FIELD)
1308 av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
1317 if (HAS_CBP(mb_type)) {
1318 cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
1320 av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
1326 //on 1 we memcpy blocks in xvmcvideo
1327 if(s->avctx->xvmc_acceleration > 1){
1328 XVMC_pack_pblocks(s,cbp);
1335 if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
1338 if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0)
1341 s->block_last_index[i] = -1;
1348 if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0)
1351 s->block_last_index[i] = -1;
1358 s->block_last_index[i] = -1;
1362 s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
1367 /* as h263, but only 17 codes */
1368 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
1370 int code, sign, val, l, shift;
1372 code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
1380 sign = get_bits1(&s->gb);
1384 val = (val - 1) << shift;
1385 val |= get_bits(&s->gb, shift);
1392 /* modulo decoding */
1394 val = ((val + l)&(l*2-1)) - l;
1398 static inline int decode_dc(GetBitContext *gb, int component)
1402 if (component == 0) {
1403 code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
1405 code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
1408 av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
1414 diff = get_xbits(gb, code);
1419 static inline int mpeg1_decode_block_intra(MpegEncContext *s,
1423 int level, dc, diff, i, j, run;
1425 RLTable *rl = &rl_mpeg1;
1426 uint8_t * const scantable= s->intra_scantable.permutated;
1427 const uint16_t *quant_matrix= s->intra_matrix;
1428 const int qscale= s->qscale;
1431 component = (n <= 3 ? 0 : n - 4 + 1);
1432 diff = decode_dc(&s->gb, component);
1435 dc = s->last_dc[component];
1437 s->last_dc[component] = dc;
1439 dprintf("dc=%d diff=%d\n", dc, diff);
1442 OPEN_READER(re, &s->gb);
1443 /* now quantify & encode AC coefs */
1445 UPDATE_CACHE(re, &s->gb);
1446 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1450 } else if(level != 0) {
1453 level= (level*qscale*quant_matrix[j])>>4;
1455 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1456 LAST_SKIP_BITS(re, &s->gb, 1);
1459 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1460 UPDATE_CACHE(re, &s->gb);
1461 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1462 if (level == -128) {
1463 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1464 } else if (level == 0) {
1465 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1471 level= (level*qscale*quant_matrix[j])>>4;
1475 level= (level*qscale*quant_matrix[j])>>4;
1480 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1486 CLOSE_READER(re, &s->gb);
1488 s->block_last_index[n] = i;
1492 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
1496 int level, i, j, run;
1497 RLTable *rl = &rl_mpeg1;
1498 uint8_t * const scantable= s->intra_scantable.permutated;
1499 const uint16_t *quant_matrix= s->inter_matrix;
1500 const int qscale= s->qscale;
1504 OPEN_READER(re, &s->gb);
1506 /* special case for the first coef. no need to add a second vlc table */
1507 UPDATE_CACHE(re, &s->gb);
1508 v= SHOW_UBITS(re, &s->gb, 2);
1510 LAST_SKIP_BITS(re, &s->gb, 2);
1511 level= (3*qscale*quant_matrix[0])>>5;
1519 /* now quantify & encode AC coefs */
1521 UPDATE_CACHE(re, &s->gb);
1522 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1526 } else if(level != 0) {
1529 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1531 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1532 LAST_SKIP_BITS(re, &s->gb, 1);
1535 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1536 UPDATE_CACHE(re, &s->gb);
1537 level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
1538 if (level == -128) {
1539 level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
1540 } else if (level == 0) {
1541 level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
1547 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1551 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1556 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1562 CLOSE_READER(re, &s->gb);
1564 s->block_last_index[n] = i;
1568 /* Also does unquantization here, since I will never support mpeg2
1570 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
1574 int level, i, j, run;
1575 RLTable *rl = &rl_mpeg1;
1576 uint8_t * const scantable= s->intra_scantable.permutated;
1577 const uint16_t *quant_matrix;
1578 const int qscale= s->qscale;
1585 OPEN_READER(re, &s->gb);
1588 quant_matrix = s->inter_matrix;
1590 quant_matrix = s->chroma_inter_matrix;
1592 /* special case for the first coef. no need to add a second vlc table */
1593 UPDATE_CACHE(re, &s->gb);
1594 v= SHOW_UBITS(re, &s->gb, 2);
1596 LAST_SKIP_BITS(re, &s->gb, 2);
1597 level= (3*qscale*quant_matrix[0])>>5;
1605 /* now quantify & encode AC coefs */
1607 UPDATE_CACHE(re, &s->gb);
1608 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1612 } else if(level != 0) {
1615 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1616 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1617 LAST_SKIP_BITS(re, &s->gb, 1);
1620 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1621 UPDATE_CACHE(re, &s->gb);
1622 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1627 level= ((-level*2+1)*qscale*quant_matrix[j])>>5;
1630 level= ((level*2+1)*qscale*quant_matrix[j])>>5;
1634 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1641 CLOSE_READER(re, &s->gb);
1643 block[63] ^= (mismatch & 1);
1645 s->block_last_index[n] = i;
1649 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
1653 int level, dc, diff, i, j, run;
1656 uint8_t * const scantable= s->intra_scantable.permutated;
1657 const uint16_t *quant_matrix;
1658 const int qscale= s->qscale;
1663 quant_matrix = s->intra_matrix;
1666 quant_matrix = s->chroma_intra_matrix;
1669 diff = decode_dc(&s->gb, component);
1672 dc = s->last_dc[component];
1674 s->last_dc[component] = dc;
1675 block[0] = dc << (3 - s->intra_dc_precision);
1676 dprintf("dc=%d\n", block[0]);
1677 mismatch = block[0] ^ 1;
1679 if (s->intra_vlc_format)
1685 OPEN_READER(re, &s->gb);
1686 /* now quantify & encode AC coefs */
1688 UPDATE_CACHE(re, &s->gb);
1689 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2);
1693 } else if(level != 0) {
1696 level= (level*qscale*quant_matrix[j])>>4;
1697 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1698 LAST_SKIP_BITS(re, &s->gb, 1);
1701 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
1702 UPDATE_CACHE(re, &s->gb);
1703 level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
1707 level= (-level*qscale*quant_matrix[j])>>4;
1710 level= (level*qscale*quant_matrix[j])>>4;
1714 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1721 CLOSE_READER(re, &s->gb);
1723 block[63]^= mismatch&1;
1725 s->block_last_index[n] = i;
1729 typedef struct Mpeg1Context {
1730 MpegEncContext mpeg_enc_ctx;
1731 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
1732 int repeat_field; /* true if we must repeat the field */
1733 AVPanScan pan_scan; /** some temporary storage for the panscan */
1736 static int mpeg_decode_init(AVCodecContext *avctx)
1738 Mpeg1Context *s = avctx->priv_data;
1740 s->mpeg_enc_ctx.avctx= avctx;
1741 s->mpeg_enc_ctx.flags= avctx->flags;
1742 common_init(&s->mpeg_enc_ctx);
1745 s->mpeg_enc_ctx_allocated = 0;
1746 s->mpeg_enc_ctx.picture_number = 0;
1747 s->repeat_field = 0;
1748 s->mpeg_enc_ctx.codec_id= avctx->codec->id;
1752 /* return the 8 bit start code value and update the search
1753 state. Return -1 if no start code found */
1754 static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
1757 unsigned int state=0xFFFFFFFF, v;
1760 buf_ptr = *pbuf_ptr;
1761 while (buf_ptr < buf_end) {
1763 if (state == 0x000001) {
1764 state = ((state << 8) | v) & 0xffffff;
1768 state = ((state << 8) | v) & 0xffffff;
1772 *pbuf_ptr = buf_ptr;
1776 static int mpeg1_decode_picture(AVCodecContext *avctx,
1777 uint8_t *buf, int buf_size)
1779 Mpeg1Context *s1 = avctx->priv_data;
1780 MpegEncContext *s = &s1->mpeg_enc_ctx;
1781 int ref, f_code, vbv_delay;
1783 init_get_bits(&s->gb, buf, buf_size*8);
1785 ref = get_bits(&s->gb, 10); /* temporal ref */
1786 s->pict_type = get_bits(&s->gb, 3);
1788 vbv_delay= get_bits(&s->gb, 16);
1789 if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
1790 s->full_pel[0] = get_bits1(&s->gb);
1791 f_code = get_bits(&s->gb, 3);
1794 s->mpeg_f_code[0][0] = f_code;
1795 s->mpeg_f_code[0][1] = f_code;
1797 if (s->pict_type == B_TYPE) {
1798 s->full_pel[1] = get_bits1(&s->gb);
1799 f_code = get_bits(&s->gb, 3);
1802 s->mpeg_f_code[1][0] = f_code;
1803 s->mpeg_f_code[1][1] = f_code;
1805 s->current_picture.pict_type= s->pict_type;
1806 s->current_picture.key_frame= s->pict_type == I_TYPE;
1808 // if(avctx->debug & FF_DEBUG_PICT_INFO)
1809 // av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d\n", vbv_delay, ref);
1817 static void mpeg_decode_sequence_extension(MpegEncContext *s)
1819 int horiz_size_ext, vert_size_ext;
1821 int frame_rate_ext_n, frame_rate_ext_d;
1824 skip_bits(&s->gb, 1); /* profil and level esc*/
1825 profile= get_bits(&s->gb, 3);
1826 level= get_bits(&s->gb, 4);
1827 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1828 skip_bits(&s->gb, 2); /* chroma_format */
1829 horiz_size_ext = get_bits(&s->gb, 2);
1830 vert_size_ext = get_bits(&s->gb, 2);
1831 s->width |= (horiz_size_ext << 12);
1832 s->height |= (vert_size_ext << 12);
1833 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1834 s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400;
1835 skip_bits1(&s->gb); /* marker */
1836 s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10;
1838 s->low_delay = get_bits1(&s->gb);
1839 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
1841 frame_rate_ext_n = get_bits(&s->gb, 2);
1842 frame_rate_ext_d = get_bits(&s->gb, 5);
1844 &s->avctx->frame_rate,
1845 &s->avctx->frame_rate_base,
1846 frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1),
1847 MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1),
1850 dprintf("sequence extension\n");
1851 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
1852 s->avctx->sub_id = 2; /* indicates mpeg2 found */
1854 if(s->aspect_ratio_info <= 1)
1855 s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
1857 s->avctx->sample_aspect_ratio=
1859 mpeg2_aspect[s->aspect_ratio_info],
1860 (AVRational){s->width, s->height}
1864 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1865 av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
1866 profile, level, s->avctx->rc_buffer_size, s->bit_rate);
1869 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1871 MpegEncContext *s= &s1->mpeg_enc_ctx;
1872 int color_description, w, h;
1874 skip_bits(&s->gb, 3); /* video format */
1875 color_description= get_bits1(&s->gb);
1876 if(color_description){
1877 skip_bits(&s->gb, 8); /* color primaries */
1878 skip_bits(&s->gb, 8); /* transfer_characteristics */
1879 skip_bits(&s->gb, 8); /* matrix_coefficients */
1881 w= get_bits(&s->gb, 14);
1882 skip_bits(&s->gb, 1); //marker
1883 h= get_bits(&s->gb, 14);
1884 skip_bits(&s->gb, 1); //marker
1886 s1->pan_scan.width= 16*w;
1887 s1->pan_scan.height=16*h;
1889 if(s->aspect_ratio_info > 1)
1890 s->avctx->sample_aspect_ratio=
1892 mpeg2_aspect[s->aspect_ratio_info],
1896 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1897 av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1900 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1902 MpegEncContext *s= &s1->mpeg_enc_ctx;
1905 for(i=0; i<1; i++){ //FIXME count
1906 s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
1907 skip_bits(&s->gb, 1); //marker
1908 s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
1909 skip_bits(&s->gb, 1); //marker
1912 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1913 av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n",
1914 s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1915 s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1916 s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]
1920 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1924 dprintf("matrix extension\n");
1926 if (get_bits1(&s->gb)) {
1928 v = get_bits(&s->gb, 8);
1929 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1930 s->intra_matrix[j] = v;
1931 s->chroma_intra_matrix[j] = v;
1934 if (get_bits1(&s->gb)) {
1936 v = get_bits(&s->gb, 8);
1937 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1938 s->inter_matrix[j] = v;
1939 s->chroma_inter_matrix[j] = v;
1942 if (get_bits1(&s->gb)) {
1944 v = get_bits(&s->gb, 8);
1945 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1946 s->chroma_intra_matrix[j] = v;
1949 if (get_bits1(&s->gb)) {
1951 v = get_bits(&s->gb, 8);
1952 j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
1953 s->chroma_inter_matrix[j] = v;
1958 static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
1960 s->full_pel[0] = s->full_pel[1] = 0;
1961 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1962 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1963 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1964 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1965 s->intra_dc_precision = get_bits(&s->gb, 2);
1966 s->picture_structure = get_bits(&s->gb, 2);
1967 s->top_field_first = get_bits1(&s->gb);
1968 s->frame_pred_frame_dct = get_bits1(&s->gb);
1969 s->concealment_motion_vectors = get_bits1(&s->gb);
1970 s->q_scale_type = get_bits1(&s->gb);
1971 s->intra_vlc_format = get_bits1(&s->gb);
1972 s->alternate_scan = get_bits1(&s->gb);
1973 s->repeat_first_field = get_bits1(&s->gb);
1974 s->chroma_420_type = get_bits1(&s->gb);
1975 s->progressive_frame = get_bits1(&s->gb);
1977 if(s->picture_structure == PICT_FRAME)
1980 s->first_field ^= 1;
1981 memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
1984 if(s->alternate_scan){
1985 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
1986 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
1988 ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
1989 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
1992 /* composite display not parsed */
1993 dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
1994 dprintf("picture_structure=%d\n", s->picture_structure);
1995 dprintf("top field first=%d\n", s->top_field_first);
1996 dprintf("repeat first field=%d\n", s->repeat_first_field);
1997 dprintf("conceal=%d\n", s->concealment_motion_vectors);
1998 dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
1999 dprintf("alternate_scan=%d\n", s->alternate_scan);
2000 dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
2001 dprintf("progressive_frame=%d\n", s->progressive_frame);
2004 static void mpeg_decode_extension(AVCodecContext *avctx,
2005 uint8_t *buf, int buf_size)
2007 Mpeg1Context *s1 = avctx->priv_data;
2008 MpegEncContext *s = &s1->mpeg_enc_ctx;
2011 init_get_bits(&s->gb, buf, buf_size*8);
2013 ext_type = get_bits(&s->gb, 4);
2016 mpeg_decode_sequence_extension(s);
2019 mpeg_decode_sequence_display_extension(s1);
2022 mpeg_decode_quant_matrix_extension(s);
2025 mpeg_decode_picture_display_extension(s1);
2028 mpeg_decode_picture_coding_extension(s);
2033 static void exchange_uv(MpegEncContext *s){
2036 tmp = s->pblocks[4];
2037 s->pblocks[4] = s->pblocks[5];
2038 s->pblocks[5] = tmp;
2041 #define DECODE_SLICE_FATAL_ERROR -2
2042 #define DECODE_SLICE_ERROR -1
2043 #define DECODE_SLICE_OK 0
2047 * @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured<br>
2048 * DECODE_SLICE_ERROR if the slice is damaged<br>
2049 * DECODE_SLICE_OK if this slice is ok<br>
2051 static int mpeg_decode_slice(AVCodecContext *avctx,
2054 uint8_t **buf, int buf_size)
2056 Mpeg1Context *s1 = avctx->priv_data;
2057 MpegEncContext *s = &s1->mpeg_enc_ctx;
2059 const int field_pic= s->picture_structure != PICT_FRAME;
2061 s->resync_mb_x= s->mb_x =
2062 s->resync_mb_y= s->mb_y = -1;
2064 start_code = (start_code - 1) & 0xff;
2065 if (start_code >= s->mb_height){
2066 av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", start_code, s->mb_height);
2070 ff_mpeg1_clean_buffers(s);
2071 s->interlaced_dct = 0;
2073 /* start frame decoding */
2074 if (s->first_slice) {
2075 if(s->first_field || s->picture_structure==PICT_FRAME){
2076 if(MPV_frame_start(s, avctx) < 0)
2077 return DECODE_SLICE_FATAL_ERROR;
2079 ff_er_frame_start(s);
2081 /* first check if we must repeat the frame */
2082 s->current_picture_ptr->repeat_pict = 0;
2083 if (s->repeat_first_field) {
2084 if (s->progressive_sequence) {
2085 if (s->top_field_first)
2086 s->current_picture_ptr->repeat_pict = 4;
2088 s->current_picture_ptr->repeat_pict = 2;
2089 } else if (s->progressive_frame) {
2090 s->current_picture_ptr->repeat_pict = 1;
2094 *s->current_picture_ptr->pan_scan= s1->pan_scan;
2095 }else{ //second field
2098 if(!s->current_picture_ptr){
2099 av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
2104 s->current_picture.data[i] = s->current_picture_ptr->data[i];
2105 if(s->picture_structure == PICT_BOTTOM_FIELD){
2106 s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
2111 // MPV_frame_start will call this function too,
2112 // but we need to call it on every field
2113 if(s->avctx->xvmc_acceleration)
2114 XVMC_field_start(s,avctx);
2116 }//fi(s->first_slice)
2118 init_get_bits(&s->gb, *buf, buf_size*8);
2120 s->qscale = get_qscale(s);
2121 if (s->first_slice && (s->first_field || s->picture_structure==PICT_FRAME)) {
2122 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2123 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",
2124 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],
2125 s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
2126 s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
2127 s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
2128 s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
2134 av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
2138 /* extra slice info */
2139 while (get_bits1(&s->gb) != 0) {
2140 skip_bits(&s->gb, 8);
2146 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2148 av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
2155 /* otherwise, stuffing, nothing to do */
2162 s->resync_mb_x= s->mb_x;
2163 s->resync_mb_y= s->mb_y = start_code;
2165 ff_init_block_index(s);
2169 //one 1 we memcpy blocks in xvmcvideo
2170 if(s->avctx->xvmc_acceleration > 1)
2171 XVMC_init_block(s);//set s->block
2174 s->dsp.clear_blocks(s->block[0]);
2176 ret = mpeg_decode_mb(s, s->block);
2177 s->chroma_qscale= s->qscale;
2179 dprintf("ret=%d\n", ret);
2183 if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
2184 const int wrap = field_pic ? 2*s->block_wrap[0] : s->block_wrap[0];
2185 int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
2186 int motion_for_top_x, motion_for_top_y, motion_back_top_x, motion_back_top_y;
2187 int motion_for_bottom_x, motion_for_bottom_y, motion_back_bottom_x, motion_back_bottom_y;
2188 if(field_pic && !s->first_field)
2192 motion_for_top_x = motion_for_top_y = motion_back_top_x = motion_back_top_y =
2193 motion_for_bottom_x = motion_for_bottom_y = motion_back_bottom_x = motion_back_bottom_y = 0;
2194 }else if (s->mv_type == MV_TYPE_16X16){
2195 motion_for_top_x = motion_for_bottom_x = s->mv[0][0][0];
2196 motion_for_top_y = motion_for_bottom_y = s->mv[0][0][1];
2197 motion_back_top_x = motion_back_bottom_x = s->mv[1][0][0];
2198 motion_back_top_y = motion_back_bottom_y = s->mv[1][0][1];
2199 } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
2200 motion_for_top_x = s->mv[0][0][0];
2201 motion_for_top_y = s->mv[0][0][1];
2202 motion_for_bottom_x = s->mv[0][1][0];
2203 motion_for_bottom_y = s->mv[0][1][1];
2204 motion_back_top_x = s->mv[1][0][0];
2205 motion_back_top_y = s->mv[1][0][1];
2206 motion_back_bottom_x = s->mv[1][1][0];
2207 motion_back_bottom_y = s->mv[1][1][1];
2210 s->current_picture.motion_val[0][xy][0] = motion_for_top_x;
2211 s->current_picture.motion_val[0][xy][1] = motion_for_top_y;
2212 s->current_picture.motion_val[0][xy + 1][0] = motion_for_top_x;
2213 s->current_picture.motion_val[0][xy + 1][1] = motion_for_top_y;
2214 s->current_picture.motion_val[0][xy + wrap][0] = motion_for_bottom_x;
2215 s->current_picture.motion_val[0][xy + wrap][1] = motion_for_bottom_y;
2216 s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_for_bottom_x;
2217 s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_for_bottom_y;
2219 if(s->pict_type != B_TYPE){
2220 motion_back_top_x = motion_back_top_y = motion_back_bottom_x = motion_back_bottom_y = 0;
2223 s->current_picture.motion_val[1][xy][0] = motion_back_top_x;
2224 s->current_picture.motion_val[1][xy][1] = motion_back_top_y;
2225 s->current_picture.motion_val[1][xy + 1][0] = motion_back_top_x;
2226 s->current_picture.motion_val[1][xy + 1][1] = motion_back_top_y;
2227 s->current_picture.motion_val[1][xy + wrap][0] = motion_back_bottom_x;
2228 s->current_picture.motion_val[1][xy + wrap][1] = motion_back_bottom_y;
2229 s->current_picture.motion_val[1][xy + 1 + wrap][0] = motion_back_bottom_x;
2230 s->current_picture.motion_val[1][xy + 1 + wrap][1] = motion_back_bottom_y;
2237 MPV_decode_mb(s, s->block);
2239 if (++s->mb_x >= s->mb_width) {
2241 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2246 if(s->mb_y<<field_pic >= s->mb_height){
2247 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
2249 if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
2250 || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
2251 av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d\n", left);
2257 ff_init_block_index(s);
2260 /* skip mb handling */
2261 if (s->mb_skip_run == -1) {
2262 /* read again increment */
2265 int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
2267 av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
2272 s->mb_skip_run += 33;
2273 }else if(code == 35){
2274 if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
2275 av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
2278 goto eos; /* end of slice */
2280 /* otherwise, stuffing, nothing to do */
2282 s->mb_skip_run += code;
2288 eos: // end of slice
2289 *buf += get_bits_count(&s->gb)/8 - 1;
2290 //printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
2295 * handles slice ends.
2296 * @return 1 if it seems to be the last slice of
2298 static int slice_end(AVCodecContext *avctx, AVFrame *pict)
2300 Mpeg1Context *s1 = avctx->priv_data;
2301 MpegEncContext *s = &s1->mpeg_enc_ctx;
2303 if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr)
2307 if(s->avctx->xvmc_acceleration)
2310 /* end of slice reached */
2311 if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
2314 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
2320 if (s->pict_type == B_TYPE || s->low_delay) {
2321 *pict= *(AVFrame*)s->current_picture_ptr;
2322 ff_print_debug_info(s, pict);
2324 s->picture_number++;
2325 /* latency of 1 frame for I and P frames */
2326 /* XXX: use another variable than picture_number */
2327 if (s->last_picture_ptr != NULL) {
2328 *pict= *(AVFrame*)s->last_picture_ptr;
2329 ff_print_debug_info(s, pict);
2339 static int mpeg1_decode_sequence(AVCodecContext *avctx,
2340 uint8_t *buf, int buf_size)
2342 Mpeg1Context *s1 = avctx->priv_data;
2343 MpegEncContext *s = &s1->mpeg_enc_ctx;
2344 int width, height, i, v, j;
2347 init_get_bits(&s->gb, buf, buf_size*8);
2349 width = get_bits(&s->gb, 12);
2350 height = get_bits(&s->gb, 12);
2351 s->aspect_ratio_info= get_bits(&s->gb, 4);
2352 if (s->aspect_ratio_info == 0)
2354 aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
2355 avctx->sample_aspect_ratio= av_d2q(aspect, 255);
2357 s->frame_rate_index = get_bits(&s->gb, 4);
2358 if (s->frame_rate_index == 0)
2360 s->bit_rate = get_bits(&s->gb, 18) * 400;
2361 if (get_bits1(&s->gb) == 0) /* marker */
2363 if (width <= 0 || height <= 0 ||
2364 (width % 2) != 0 || (height % 2) != 0)
2366 if (width != s->width ||
2367 height != s->height) {
2368 /* start new mpeg1 context decoding */
2369 s->out_format = FMT_MPEG1;
2370 if (s1->mpeg_enc_ctx_allocated) {
2375 avctx->has_b_frames= 1;
2376 avctx->width = width;
2377 avctx->height = height;
2380 &avctx->frame_rate_base,
2381 frame_rate_tab[s->frame_rate_index],
2382 MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form
2385 avctx->bit_rate = s->bit_rate;
2387 //get_format() or set_video(width,height,aspect,pix_fmt);
2388 //until then pix_fmt may be changed right after codec init
2389 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2390 if( avctx->idct_algo == FF_IDCT_AUTO )
2391 avctx->idct_algo = FF_IDCT_SIMPLE;
2393 if (MPV_common_init(s) < 0)
2395 s1->mpeg_enc_ctx_allocated = 1;
2396 s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
2399 s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
2400 skip_bits(&s->gb, 1);
2403 if (get_bits1(&s->gb)) {
2405 v = get_bits(&s->gb, 8);
2406 j = s->intra_scantable.permutated[i];
2407 s->intra_matrix[j] = v;
2408 s->chroma_intra_matrix[j] = v;
2411 dprintf("intra matrix present\n");
2413 dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
2418 int j= s->dsp.idct_permutation[i];
2419 v = ff_mpeg1_default_intra_matrix[i];
2420 s->intra_matrix[j] = v;
2421 s->chroma_intra_matrix[j] = v;
2424 if (get_bits1(&s->gb)) {
2426 v = get_bits(&s->gb, 8);
2427 j = s->intra_scantable.permutated[i];
2428 s->inter_matrix[j] = v;
2429 s->chroma_inter_matrix[j] = v;
2432 dprintf("non intra matrix present\n");
2434 dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
2439 int j= s->dsp.idct_permutation[i];
2440 v = ff_mpeg1_default_non_intra_matrix[i];
2441 s->inter_matrix[j] = v;
2442 s->chroma_inter_matrix[j] = v;
2446 /* we set mpeg2 parameters so that it emulates mpeg1 */
2447 s->progressive_sequence = 1;
2448 s->progressive_frame = 1;
2449 s->picture_structure = PICT_FRAME;
2450 s->frame_pred_frame_dct = 1;
2451 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
2452 avctx->sub_id = 1; /* indicates mpeg1 */
2453 if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
2455 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
2456 av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n",
2457 s->avctx->rc_buffer_size, s->bit_rate);
2462 static int vcr2_init_sequence(AVCodecContext *avctx)
2464 Mpeg1Context *s1 = avctx->priv_data;
2465 MpegEncContext *s = &s1->mpeg_enc_ctx;
2468 /* start new mpeg1 context decoding */
2469 s->out_format = FMT_MPEG1;
2470 if (s1->mpeg_enc_ctx_allocated) {
2473 s->width = avctx->width;
2474 s->height = avctx->height;
2475 avctx->has_b_frames= 0; //true?
2478 //get_format() or set_video(width,height,aspect,pix_fmt);
2479 //until then pix_fmt may be changed right after codec init
2480 if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
2481 if( avctx->idct_algo == FF_IDCT_AUTO )
2482 avctx->idct_algo = FF_IDCT_SIMPLE;
2484 if (MPV_common_init(s) < 0)
2486 exchange_uv(s);//common init reset pblocks, so we swap them here
2487 s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB
2488 s1->mpeg_enc_ctx_allocated = 1;
2491 int j= s->dsp.idct_permutation[i];
2492 v = ff_mpeg1_default_intra_matrix[i];
2493 s->intra_matrix[j] = v;
2494 s->chroma_intra_matrix[j] = v;
2496 v = ff_mpeg1_default_non_intra_matrix[i];
2497 s->inter_matrix[j] = v;
2498 s->chroma_inter_matrix[j] = v;
2501 s->progressive_sequence = 1;
2502 s->progressive_frame = 1;
2503 s->picture_structure = PICT_FRAME;
2504 s->frame_pred_frame_dct = 1;
2505 s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
2506 avctx->sub_id = 2; /* indicates mpeg2 */
2511 static void mpeg_decode_user_data(AVCodecContext *avctx,
2512 const uint8_t *buf, int buf_size)
2519 /* we parse the DTG active format information */
2521 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2535 avctx->dtg_active_format = p[0] & 0x0f;
2541 * finds the end of the current frame in the bitstream.
2542 * @return the position of the first byte of the next frame, or -1
2544 static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
2545 ParseContext *pc= &s->parse_context;
2552 if(!pc->frame_start_found){
2553 for(i=0; i<buf_size; i++){
2554 state= (state<<8) | buf[i];
2555 if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
2557 pc->frame_start_found=1;
2563 if(pc->frame_start_found){
2564 for(; i<buf_size; i++){
2565 state= (state<<8) | buf[i];
2566 if((state&0xFFFFFF00) == 0x100){
2567 if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
2568 pc->frame_start_found=0;
2576 return END_NOT_FOUND;
2579 /* handle buffering and image synchronisation */
2580 static int mpeg_decode_frame(AVCodecContext *avctx,
2581 void *data, int *data_size,
2582 uint8_t *buf, int buf_size)
2584 Mpeg1Context *s = avctx->priv_data;
2585 uint8_t *buf_end, *buf_ptr;
2586 int ret, start_code, input_size;
2587 AVFrame *picture = data;
2588 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2589 dprintf("fill_buffer\n");
2593 /* special case for last picture */
2594 if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
2595 *picture= *(AVFrame*)s2->next_picture_ptr;
2596 s2->next_picture_ptr= NULL;
2598 *data_size = sizeof(AVFrame);
2602 if(s2->flags&CODEC_FLAG_TRUNCATED){
2603 int next= mpeg1_find_frame_end(s2, buf, buf_size);
2605 if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
2610 buf_end = buf + buf_size;
2613 if (s->repeat_field % 2 == 1) {
2615 //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number,
2616 // s2->picture_number, s->repeat_field);
2617 if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) {
2618 *data_size = sizeof(AVPicture);
2624 if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2"))
2625 vcr2_init_sequence(avctx);
2628 /* find start next code */
2629 start_code = find_start_code(&buf_ptr, buf_end);
2630 if (start_code < 0){
2631 if(s2->pict_type != B_TYPE || avctx->hurry_up==0){
2632 if (slice_end(avctx, picture)) {
2633 if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice
2634 *data_size = sizeof(AVPicture);
2637 return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
2640 input_size = buf_end - buf_ptr;
2642 if(avctx->debug & FF_DEBUG_STARTCODE){
2643 av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
2646 /* prepare data for next start code */
2647 switch(start_code) {
2648 case SEQ_START_CODE:
2649 mpeg1_decode_sequence(avctx, buf_ptr,
2653 case PICTURE_START_CODE:
2654 /* we have a complete image : we try to decompress it */
2655 mpeg1_decode_picture(avctx,
2656 buf_ptr, input_size);
2658 case EXT_START_CODE:
2659 mpeg_decode_extension(avctx,
2660 buf_ptr, input_size);
2662 case USER_START_CODE:
2663 mpeg_decode_user_data(avctx,
2664 buf_ptr, input_size);
2666 case GOP_START_CODE:
2670 if (start_code >= SLICE_MIN_START_CODE &&
2671 start_code <= SLICE_MAX_START_CODE) {
2673 /* skip b frames if we dont have reference frames */
2674 if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
2675 /* skip b frames if we are in a hurry */
2676 if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
2677 /* skip everything if we are in a hurry>=5 */
2678 if(avctx->hurry_up>=5) break;
2680 if (!s->mpeg_enc_ctx_allocated) break;
2682 ret = mpeg_decode_slice(avctx, picture,
2683 start_code, &buf_ptr, input_size);
2687 if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
2688 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);
2689 if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
2691 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);
2699 static int mpeg_decode_end(AVCodecContext *avctx)
2701 Mpeg1Context *s = avctx->priv_data;
2703 if (s->mpeg_enc_ctx_allocated)
2704 MPV_common_end(&s->mpeg_enc_ctx);
2708 AVCodec mpeg1video_decoder = {
2711 CODEC_ID_MPEG1VIDEO,
2712 sizeof(Mpeg1Context),
2717 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2718 .flush= ff_mpeg_flush,
2721 AVCodec mpeg2video_decoder = {
2724 CODEC_ID_MPEG2VIDEO,
2725 sizeof(Mpeg1Context),
2730 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2731 .flush= ff_mpeg_flush,
2735 AVCodec mpegvideo_decoder = {
2738 CODEC_ID_MPEG2VIDEO,
2739 sizeof(Mpeg1Context),
2744 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2745 .flush= ff_mpeg_flush,
2749 static int mpeg_mc_decode_init(AVCodecContext *avctx){
2752 if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
2754 if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
2755 dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
2757 mpeg_decode_init(avctx);
2758 s = avctx->priv_data;
2760 avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT;
2761 avctx->xvmc_acceleration = 2;//2 - the blocks are packed!
2766 AVCodec mpeg_xvmc_decoder = {
2769 CODEC_ID_MPEG2VIDEO_XVMC,
2770 sizeof(Mpeg1Context),
2771 mpeg_mc_decode_init,
2775 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
2780 /* this is ugly i know, but the alternative is too make
2781 hundreds of vars global and prefix them with ff_mpeg1_
2782 which is far uglier. */