Elision header demuxing support.
[libav.git] / libavformat / nutenc.c
CommitLineData
70ea1e69
MN
1/*
2 * nut muxer
3 * Copyright (c) 2004-2007 Michael Niedermayer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "nut.h"
7c04134f 23#include "tree.h"
70ea1e69 24
70ea1e69
MN
25static void build_frame_code(AVFormatContext *s){
26 NUTContext *nut = s->priv_data;
27 int key_frame, index, pred, stream_id;
28 int start=1;
29 int end= 254;
30 int keyframe_0_esc= s->nb_streams > 2;
31 int pred_table[10];
0fcfa8eb
MN
32 FrameCode *ft;
33
34 ft= &nut->frame_code[start];
35 ft->flags= FLAG_CODED;
36 ft->size_mul=1;
37 ft->pts_delta=1;
38 start++;
70ea1e69
MN
39
40 if(keyframe_0_esc){
41 /* keyframe = 0 escape */
42 FrameCode *ft= &nut->frame_code[start];
43 ft->flags= FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
44 ft->size_mul=1;
45 start++;
46 }
47
48 for(stream_id= 0; stream_id<s->nb_streams; stream_id++){
49 int start2= start + (end-start)*stream_id / s->nb_streams;
50 int end2 = start + (end-start)*(stream_id+1) / s->nb_streams;
51 AVCodecContext *codec = s->streams[stream_id]->codec;
52 int is_audio= codec->codec_type == CODEC_TYPE_AUDIO;
53 int intra_only= /*codec->intra_only || */is_audio;
54 int pred_count;
55
56 for(key_frame=0; key_frame<2; key_frame++){
57 if(intra_only && keyframe_0_esc && key_frame==0)
58 continue;
59
60 {
61 FrameCode *ft= &nut->frame_code[start2];
62 ft->flags= FLAG_KEY*key_frame;
63 ft->flags|= FLAG_SIZE_MSB | FLAG_CODED_PTS;
64 ft->stream_id= stream_id;
65 ft->size_mul=1;
66 start2++;
67 }
68 }
69
70 key_frame= intra_only;
71#if 1
72 if(is_audio){
73 int frame_bytes= codec->frame_size*(int64_t)codec->bit_rate / (8*codec->sample_rate);
74 int pts;
75 for(pts=0; pts<2; pts++){
76 for(pred=0; pred<2; pred++){
77 FrameCode *ft= &nut->frame_code[start2];
78 ft->flags= FLAG_KEY*key_frame;
79 ft->stream_id= stream_id;
80 ft->size_mul=frame_bytes + 2;
81 ft->size_lsb=frame_bytes + pred;
82 ft->pts_delta=pts;
83 start2++;
84 }
85 }
86 }else{
87 FrameCode *ft= &nut->frame_code[start2];
88 ft->flags= FLAG_KEY | FLAG_SIZE_MSB;
89 ft->stream_id= stream_id;
90 ft->size_mul=1;
91 ft->pts_delta=1;
92 start2++;
93 }
94#endif
95
96 if(codec->has_b_frames){
97 pred_count=5;
98 pred_table[0]=-2;
99 pred_table[1]=-1;
100 pred_table[2]=1;
101 pred_table[3]=3;
102 pred_table[4]=4;
103 }else if(codec->codec_id == CODEC_ID_VORBIS){
104 pred_count=3;
105 pred_table[0]=2;
106 pred_table[1]=9;
107 pred_table[2]=16;
108 }else{
109 pred_count=1;
110 pred_table[0]=1;
111 }
112
113 for(pred=0; pred<pred_count; pred++){
114 int start3= start2 + (end2-start2)*pred / pred_count;
115 int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
116
117 for(index=start3; index<end3; index++){
118 FrameCode *ft= &nut->frame_code[index];
119 ft->flags= FLAG_KEY*key_frame;
120 ft->flags|= FLAG_SIZE_MSB;
121 ft->stream_id= stream_id;
122//FIXME use single byte size and pred from last
123 ft->size_mul= end3-start3;
124 ft->size_lsb= index - start3;
125 ft->pts_delta= pred_table[pred];
126 }
127 }
128 }
129 memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N'));
130 nut->frame_code[ 0].flags=
131 nut->frame_code[255].flags=
132 nut->frame_code['N'].flags= FLAG_INVALID;
133}
134
135/**
136 * Gets the length in bytes which is needed to store val as v.
137 */
138static int get_length(uint64_t val){
139 int i=1;
140
141 while(val>>=7)
142 i++;
143
144 return i;
145}
146
147static void put_v(ByteIOContext *bc, uint64_t val){
148 int i= get_length(val);
149
150 while(--i>0)
151 put_byte(bc, 128 | (val>>(7*i)));
152
153 put_byte(bc, val&127);
154}
155
491216c6
MN
156static void put_t(NUTContext *nut, StreamContext *nus, ByteIOContext *bc, uint64_t val){
157 val *= nut->time_base_count;
158 val += nus->time_base - nut->time_base;
159 put_v(bc, val);
160}
161
70ea1e69 162/**
93951943 163 * Stores a string as vb.
70ea1e69
MN
164 */
165static void put_str(ByteIOContext *bc, const char *string){
166 int len= strlen(string);
167
168 put_v(bc, len);
169 put_buffer(bc, string, len);
170}
171
172static void put_s(ByteIOContext *bc, int64_t val){
173 put_v(bc, 2*FFABS(val) - (val>0));
174}
175
176#ifdef TRACE
177static inline void put_v_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){
7a26da44 178 av_log(NULL, AV_LOG_DEBUG, "put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
70ea1e69
MN
179
180 put_v(bc, v);
181}
182
183static inline void put_s_trace(ByteIOContext *bc, int64_t v, char *file, char *func, int line){
7a26da44 184 av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
70ea1e69
MN
185
186 put_s(bc, v);
187}
188#define put_v(bc, v) put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
189#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
190#endif
191
34f8cc38 192//FIXME remove calculate_checksum
f0a9978c 193static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum, uint64_t startcode){
8d9a3f7e
MN
194 uint8_t *dyn_buf=NULL;
195 int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
6c666941
MN
196 int forw_ptr= dyn_size + 4*calculate_checksum;
197
198 if(forw_ptr > 4096)
992e78f5 199 init_checksum(bc, ff_crc04C11DB7_update, 0);
f0a9978c 200 put_be64(bc, startcode);
6c666941
MN
201 put_v(bc, forw_ptr);
202 if(forw_ptr > 4096)
203 put_le32(bc, get_checksum(bc));
70ea1e69
MN
204
205 if(calculate_checksum)
992e78f5 206 init_checksum(bc, ff_crc04C11DB7_update, 0);
8d9a3f7e 207 put_buffer(bc, dyn_buf, dyn_size);
70ea1e69 208 if(calculate_checksum)
8d9a3f7e 209 put_le32(bc, get_checksum(bc));
70ea1e69 210
8d9a3f7e 211 av_free(dyn_buf);
70ea1e69
MN
212}
213
97d5eb11 214static void write_mainheader(NUTContext *nut, ByteIOContext *bc){
70ea1e69
MN
215 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields;
216
a17e046a 217 put_v(bc, 3); /* version */
97d5eb11 218 put_v(bc, nut->avf->nb_streams);
82badd27 219 put_v(bc, nut->max_distance);
70ea1e69
MN
220 put_v(bc, nut->time_base_count);
221
222 for(i=0; i<nut->time_base_count; i++){
223 put_v(bc, nut->time_base[i].num);
224 put_v(bc, nut->time_base[i].den);
225 }
226
70ea1e69
MN
227 tmp_pts=0;
228 tmp_mul=1;
229 tmp_stream=0;
230 for(i=0; i<256;){
231 tmp_fields=0;
232 tmp_size=0;
233// tmp_res=0;
234 if(tmp_pts != nut->frame_code[i].pts_delta) tmp_fields=1;
235 if(tmp_mul != nut->frame_code[i].size_mul ) tmp_fields=2;
236 if(tmp_stream != nut->frame_code[i].stream_id) tmp_fields=3;
237 if(tmp_size != nut->frame_code[i].size_lsb ) tmp_fields=4;
238// if(tmp_res != nut->frame_code[i].res ) tmp_fields=5;
239
240 tmp_pts = nut->frame_code[i].pts_delta;
241 tmp_flags = nut->frame_code[i].flags;
242 tmp_stream= nut->frame_code[i].stream_id;
243 tmp_mul = nut->frame_code[i].size_mul;
244 tmp_size = nut->frame_code[i].size_lsb;
245// tmp_res = nut->frame_code[i].res;
246
247 for(j=0; i<256; j++,i++){
248 if(i == 'N'){
249 j--;
250 continue;
251 }
252 if(nut->frame_code[i].pts_delta != tmp_pts ) break;
253 if(nut->frame_code[i].flags != tmp_flags ) break;
254 if(nut->frame_code[i].stream_id != tmp_stream) break;
255 if(nut->frame_code[i].size_mul != tmp_mul ) break;
256 if(nut->frame_code[i].size_lsb != tmp_size+j) break;
257// if(nut->frame_code[i].res != tmp_res ) break;
258 }
259 if(j != tmp_mul - tmp_size) tmp_fields=6;
260
261 put_v(bc, tmp_flags);
262 put_v(bc, tmp_fields);
263 if(tmp_fields>0) put_s(bc, tmp_pts);
264 if(tmp_fields>1) put_v(bc, tmp_mul);
265 if(tmp_fields>2) put_v(bc, tmp_stream);
266 if(tmp_fields>3) put_v(bc, tmp_size);
267 if(tmp_fields>4) put_v(bc, 0 /*tmp_res*/);
268 if(tmp_fields>5) put_v(bc, j);
269 }
97d5eb11 270}
70ea1e69 271
0809b51e
MN
272static int write_streamheader(NUTContext *nut, ByteIOContext *bc, AVCodecContext *codec, int i){
273 put_v(bc, i);
274 switch(codec->codec_type){
275 case CODEC_TYPE_VIDEO: put_v(bc, 0); break;
276 case CODEC_TYPE_AUDIO: put_v(bc, 1); break;
277// case CODEC_TYPE_TEXT : put_v(bc, 2); break;
278 default : put_v(bc, 3); break;
279 }
280 put_v(bc, 4);
281 if (codec->codec_tag){
282 put_le32(bc, codec->codec_tag);
283 }else
284 return -1;
285
6e6cf116 286 put_v(bc, nut->stream[i].time_base - nut->time_base);
0809b51e
MN
287 put_v(bc, nut->stream[i].msb_pts_shift);
288 put_v(bc, nut->stream[i].max_pts_distance);
289 put_v(bc, codec->has_b_frames);
290 put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
291
292 put_v(bc, codec->extradata_size);
293 put_buffer(bc, codec->extradata, codec->extradata_size);
294
295 switch(codec->codec_type){
296 case CODEC_TYPE_AUDIO:
297 put_v(bc, codec->sample_rate);
298 put_v(bc, 1);
299 put_v(bc, codec->channels);
300 break;
301 case CODEC_TYPE_VIDEO:
302 put_v(bc, codec->width);
303 put_v(bc, codec->height);
0a5790d1
MN
304
305 if(codec->sample_aspect_ratio.num<=0 || codec->sample_aspect_ratio.den<=0){
306 put_v(bc, 0);
307 put_v(bc, 0);
308 }else{
309 put_v(bc, codec->sample_aspect_ratio.num);
310 put_v(bc, codec->sample_aspect_ratio.den);
311 }
0809b51e
MN
312 put_v(bc, 0); /* csp type -- unknown */
313 break;
314 default:
315 break;
316 }
317 return 0;
318}
319
4cf97abb 320static int add_info(ByteIOContext *bc, const char *type, const char *value){
ead1939f
MN
321 put_str(bc, type);
322 put_s(bc, -1);
323 put_str(bc, value);
324 return 1;
325}
326
899681cd 327static int write_globalinfo(NUTContext *nut, ByteIOContext *bc){
ead1939f 328 AVFormatContext *s= nut->avf;
899681cd 329 ByteIOContext *dyn_bc;
ead1939f
MN
330 uint8_t *dyn_buf=NULL;
331 int count=0, dyn_size;
899681cd
BA
332 int ret = url_open_dyn_buf(&dyn_bc);
333 if(ret < 0)
334 return ret;
ead1939f 335
899681cd
BA
336 if(s->title [0]) count+= add_info(dyn_bc, "Title" , s->title);
337 if(s->author [0]) count+= add_info(dyn_bc, "Author" , s->author);
338 if(s->copyright[0]) count+= add_info(dyn_bc, "Copyright", s->copyright);
ead1939f 339 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
899681cd 340 count+= add_info(dyn_bc, "Encoder" , LIBAVFORMAT_IDENT);
ead1939f
MN
341
342 put_v(bc, 0); //stream_if_plus1
343 put_v(bc, 0); //chapter_id
344 put_v(bc, 0); //timestamp_start
345 put_v(bc, 0); //length
346
347 put_v(bc, count);
348
899681cd 349 dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
ead1939f
MN
350 put_buffer(bc, dyn_buf, dyn_size);
351 av_free(dyn_buf);
899681cd 352 return 0;
ead1939f
MN
353}
354
899681cd
BA
355static int write_headers(NUTContext *nut, ByteIOContext *bc){
356 ByteIOContext *dyn_bc;
357 int i, ret;
7e506494 358
899681cd
BA
359 ret = url_open_dyn_buf(&dyn_bc);
360 if(ret < 0)
361 return ret;
362 write_mainheader(nut, dyn_bc);
363 put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE);
7e506494
MN
364
365 for (i=0; i < nut->avf->nb_streams; i++){
366 AVCodecContext *codec = nut->avf->streams[i]->codec;
367
899681cd
BA
368 ret = url_open_dyn_buf(&dyn_bc);
369 if(ret < 0)
370 return ret;
371 write_streamheader(nut, dyn_bc, codec, i);
372 put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE);
7e506494 373 }
ead1939f 374
899681cd
BA
375 ret = url_open_dyn_buf(&dyn_bc);
376 if(ret < 0)
377 return ret;
378 write_globalinfo(nut, dyn_bc);
379 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
14b3f996
MN
380
381 nut->last_syncpoint_pos= INT_MIN;
382 nut->header_count++;
899681cd 383 return 0;
7e506494
MN
384}
385
97d5eb11
MN
386static int write_header(AVFormatContext *s){
387 NUTContext *nut = s->priv_data;
899681cd 388 ByteIOContext *bc = s->pb;
97d5eb11
MN
389 int i, j;
390
391 nut->avf= s;
392
393 nut->stream = av_mallocz(sizeof(StreamContext)*s->nb_streams);
394 nut->time_base= av_mallocz(sizeof(AVRational )*s->nb_streams);
395
396 for(i=0; i<s->nb_streams; i++){
397 AVStream *st= s->streams[i];
398 int ssize;
399 AVRational time_base;
400 ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num);
401
402 av_set_pts_info(st, 64, time_base.num, time_base.den);
403
404 for(j=0; j<nut->time_base_count; j++){
405 if(!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))){
406 break;
407 }
408 }
409 nut->time_base[j]= time_base;
410 nut->stream[i].time_base= &nut->time_base[j];
411 if(j==nut->time_base_count)
412 nut->time_base_count++;
413
414 if(av_q2d(time_base) >= 0.001)
415 nut->stream[i].msb_pts_shift = 7;
416 else
417 nut->stream[i].msb_pts_shift = 14;
418 nut->stream[i].max_pts_distance= FFMAX(1/av_q2d(time_base), 1);
419 }
420
82badd27 421 nut->max_distance = MAX_DISTANCE;
97d5eb11
MN
422 build_frame_code(s);
423 assert(nut->frame_code['N'].flags == FLAG_INVALID);
424
425 put_buffer(bc, ID_STRING, strlen(ID_STRING));
426 put_byte(bc, 0);
427
7e506494 428 write_headers(nut, bc);
dcc9bde0 429
70ea1e69
MN
430 put_flush_packet(bc);
431
14b3f996 432 //FIXME index
70ea1e69
MN
433
434 return 0;
435}
436
e1249ba9
MN
437static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, AVPacket *pkt){
438 int flags= 0;
439
440 if(pkt->flags & PKT_FLAG_KEY ) flags |= FLAG_KEY;
441 if(pkt->stream_index != fc->stream_id ) flags |= FLAG_STREAM_ID;
442 if(pkt->size / fc->size_mul ) flags |= FLAG_SIZE_MSB;
443 if(pkt->pts - nus->last_pts != fc->pts_delta) flags |= FLAG_CODED_PTS;
444 if(pkt->size > 2*nut->max_distance ) flags |= FLAG_CHECKSUM;
445 if(FFABS(pkt->pts - nus->last_pts)
446 > nus->max_pts_distance) flags |= FLAG_CHECKSUM;
447
d2062ff6 448 return flags | (fc->flags & FLAG_CODED);
e1249ba9
MN
449}
450
70ea1e69 451static int write_packet(AVFormatContext *s, AVPacket *pkt){
e1249ba9
MN
452 NUTContext *nut = s->priv_data;
453 StreamContext *nus= &nut->stream[pkt->stream_index];
899681cd 454 ByteIOContext *bc = s->pb, *dyn_bc;
e1249ba9
MN
455 FrameCode *fc;
456 int64_t coded_pts;
457 int best_length, frame_code, flags, needed_flags, i;
458 int key_frame = !!(pkt->flags & PKT_FLAG_KEY);
459 int store_sp=0;
899681cd 460 int ret;
e1249ba9 461
14b3f996
MN
462 if(1LL<<(20+3*nut->header_count) <= url_ftell(bc))
463 write_headers(nut, bc);
464
02c986a8 465 if(key_frame && !(nus->last_flags & FLAG_KEY))
e1249ba9
MN
466 store_sp= 1;
467
468 if(pkt->size + 30/*FIXME check*/ + url_ftell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
469 store_sp= 1;
470
93951943 471//FIXME: Ensure store_sp is 1 in the first place.
e1249ba9
MN
472
473 if(store_sp){
7c04134f
MN
474 syncpoint_t *sp, dummy= {.pos= INT64_MAX};
475
e1249ba9 476 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
7c04134f
MN
477 for(i=0; i<s->nb_streams; i++){
478 AVStream *st= s->streams[i];
4ddcc983
OS
479 int64_t dts_tb = av_rescale_rnd(pkt->dts,
480 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
481 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
482 AV_ROUND_DOWN);
483 int index= av_index_search_timestamp(st, dts_tb, AVSEEK_FLAG_BACKWARD);
175e23e8 484 if(index>=0) dummy.pos= FFMIN(dummy.pos, st->index_entries[index].pos);
7c04134f 485 }
175e23e8
MN
486 if(dummy.pos == INT64_MAX)
487 dummy.pos= 0;
7c04134f 488 sp= av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, NULL);
e1249ba9
MN
489
490 nut->last_syncpoint_pos= url_ftell(bc);
899681cd
BA
491 ret = url_open_dyn_buf(&dyn_bc);
492 if(ret < 0)
493 return ret;
494 put_t(nut, nus, dyn_bc, pkt->dts);
495 put_v(dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos)>>4 : 0);
496 put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
7c04134f
MN
497
498 ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0/*unused*/, pkt->dts);
e1249ba9
MN
499 }
500 assert(nus->last_pts != AV_NOPTS_VALUE);
501
502 coded_pts = pkt->pts & ((1<<nus->msb_pts_shift)-1);
503 if(ff_lsb2full(nus, coded_pts) != pkt->pts)
504 coded_pts= pkt->pts + (1<<nus->msb_pts_shift);
505
506 best_length=INT_MAX;
507 frame_code= -1;
508 for(i=0; i<256; i++){
509 int length= 0;
510 FrameCode *fc= &nut->frame_code[i];
511 int flags= fc->flags;
512
513 if(flags & FLAG_INVALID)
514 continue;
515 needed_flags= get_needed_flags(nut, nus, fc, pkt);
516
517 if(flags & FLAG_CODED){
518 length++;
63dd9d0e 519 flags = needed_flags;
e1249ba9
MN
520 }
521
522 if((flags & needed_flags) != needed_flags)
523 continue;
524
525 if((flags ^ needed_flags) & FLAG_KEY)
526 continue;
527
528 if(flags & FLAG_STREAM_ID)
529 length+= get_length(pkt->stream_index);
530
531 if(pkt->size % fc->size_mul != fc->size_lsb)
532 continue;
533 if(flags & FLAG_SIZE_MSB)
534 length += get_length(pkt->size / fc->size_mul);
535
536 if(flags & FLAG_CHECKSUM)
537 length+=4;
538
539 if(flags & FLAG_CODED_PTS)
540 length += get_length(coded_pts);
541
542 length*=4;
543 length+= !(flags & FLAG_CODED_PTS);
544 length+= !(flags & FLAG_CHECKSUM);
545
546 if(length < best_length){
547 best_length= length;
548 frame_code=i;
549 }
550 }
551 assert(frame_code != -1);
552 fc= &nut->frame_code[frame_code];
553 flags= fc->flags;
554 needed_flags= get_needed_flags(nut, nus, fc, pkt);
555
992e78f5 556 init_checksum(bc, ff_crc04C11DB7_update, 0);
e1249ba9
MN
557 put_byte(bc, frame_code);
558 if(flags & FLAG_CODED){
559 put_v(bc, (flags^needed_flags) & ~(FLAG_CODED));
560 flags = needed_flags;
561 }
562 if(flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index);
563 if(flags & FLAG_CODED_PTS) put_v(bc, coded_pts);
564 if(flags & FLAG_SIZE_MSB) put_v(bc, pkt->size / fc->size_mul);
565
566 if(flags & FLAG_CHECKSUM) put_le32(bc, get_checksum(bc));
567 else get_checksum(bc);
568
569 put_buffer(bc, pkt->data, pkt->size);
570 nus->last_flags= flags;
7c04134f
MN
571
572 //FIXME just store one per syncpoint
573 if(flags & FLAG_KEY)
574 av_add_index_entry(
575 s->streams[pkt->stream_index],
576 nut->last_syncpoint_pos,
577 pkt->pts,
578 0,
579 0,
580 AVINDEX_KEYFRAME);
581
70ea1e69
MN
582 return 0;
583}
584
bd533e6c
MN
585static int write_trailer(AVFormatContext *s){
586 NUTContext *nut= s->priv_data;
899681cd 587 ByteIOContext *bc= s->pb;
bd533e6c 588
14b3f996
MN
589 while(nut->header_count<3)
590 write_headers(nut, bc);
bd533e6c
MN
591 put_flush_packet(bc);
592
593 return 0;
594}
595
70ea1e69
MN
596AVOutputFormat nut_muxer = {
597 "nut",
598 "nut format",
599 "video/x-nut",
600 "nut",
601 sizeof(NUTContext),
602#ifdef CONFIG_LIBVORBIS
603 CODEC_ID_VORBIS,
604#elif defined(CONFIG_LIBMP3LAME)
605 CODEC_ID_MP3,
606#else
607 CODEC_ID_MP2, /* AC3 needs liba52 decoder */
608#endif
609 CODEC_ID_MPEG4,
610 write_header,
611 write_packet,
bd533e6c 612 write_trailer,
70ea1e69 613 .flags = AVFMT_GLOBALHEADER,
dcc9bde0 614 .codec_tag= (const AVCodecTag*[]){codec_bmp_tags, codec_wav_tags, 0},
70ea1e69 615};