Define AVMediaType enum, and use it instead of enum CodecType, which
[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
6a5d31ac 22#include "libavutil/intreadwrite.h"
245976da
DB
23#include "libavutil/tree.h"
24#include "libavcodec/mpegaudiodata.h"
70ea1e69 25#include "nut.h"
a712d725
MN
26
27static int find_expected_header(AVCodecContext *c, int size, int key_frame, uint8_t out[64]){
28 int sample_rate= c->sample_rate;
29
30 if(size>4096)
31 return 0;
32
33 AV_WB24(out, 1);
34
35 if(c->codec_id == CODEC_ID_MPEG4){
36 if(key_frame){
37 return 3;
38 }else{
39 out[3]= 0xB6;
40 return 4;
41 }
42 }else if(c->codec_id == CODEC_ID_MPEG1VIDEO || c->codec_id == CODEC_ID_MPEG2VIDEO){
43 return 3;
44 }else if(c->codec_id == CODEC_ID_H264){
45 return 3;
46 }else if(c->codec_id == CODEC_ID_MP3 || c->codec_id == CODEC_ID_MP2){
47 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
48 int layer= c->codec_id == CODEC_ID_MP3 ? 3 : 2;
49 unsigned int header= 0xFFF00000;
50
51 lsf = sample_rate < (24000+32000)/2;
52 mpeg25 = sample_rate < (12000+16000)/2;
53 sample_rate <<= lsf + mpeg25;
54 if (sample_rate < (32000 + 44100)/2) sample_rate_index=2;
55 else if(sample_rate < (44100 + 48000)/2) sample_rate_index=0;
56 else sample_rate_index=1;
57
58 sample_rate= ff_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25);
59
60 for(bitrate_index=2; bitrate_index<30; bitrate_index++){
61 frame_size = ff_mpa_bitrate_tab[lsf][layer-1][bitrate_index>>1];
62 frame_size = (frame_size * 144000) / (sample_rate << lsf) + (bitrate_index&1);
63
64 if(frame_size == size)
65 break;
66 }
67
68 header |= (!lsf)<<19;
69 header |= (4-layer)<<17;
70 header |= 1<<16; //no crc
71 AV_WB32(out, header);
72 if(size <= 0)
7ce68923 73 return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead
a712d725
MN
74 if(bitrate_index == 30)
75 return -1; //something is wrong ...
76
77 header |= (bitrate_index>>1)<<12;
78 header |= sample_rate_index<<10;
79 header |= (bitrate_index&1)<<9;
80
81 return 2; //FIXME actually put the needed ones in build_elision_headers()
7ce68923
DB
82 return 3; //we guess that the private bit is not set
83//FIXME the above assumptions should be checked, if these turn out false too often something should be done
a712d725
MN
84 }
85 return 0;
86}
87
88static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int frame_type){
89 NUTContext *nut = s->priv_data;
90 uint8_t out[64];
91 int i;
92 int len= find_expected_header(c, size, frame_type, out);
93
94//av_log(NULL, AV_LOG_ERROR, "expected_h len=%d size=%d codec_id=%d\n", len, size, c->codec_id);
95
96 for(i=1; i<nut->header_count; i++){
97 if( len == nut->header_len[i]
98 && !memcmp(out, nut->header[i], len)){
99// av_log(NULL, AV_LOG_ERROR, "found %d\n", i);
100 return i;
101 }
102 }
103// av_log(NULL, AV_LOG_ERROR, "nothing found\n");
104 return 0;
105}
106
107static void build_elision_headers(AVFormatContext *s){
108 NUTContext *nut = s->priv_data;
109 int i;
110 //FIXME this is lame
111 //FIXME write a 2pass mode to find the maximal headers
1bf6e565 112 static const uint8_t headers[][5]={
a712d725
MN
113 {3, 0x00, 0x00, 0x01},
114 {4, 0x00, 0x00, 0x01, 0xB6},
115 {2, 0xFF, 0xFA}, //mp3+crc
116 {2, 0xFF, 0xFB}, //mp3
117 {2, 0xFF, 0xFC}, //mp2+crc
118 {2, 0xFF, 0xFD}, //mp2
119 };
120
121 nut->header_count= 7;
122 for(i=1; i<nut->header_count; i++){
123 nut->header_len[i]= headers[i-1][0];
124 nut->header [i]= &headers[i-1][1];
125 }
126}
70ea1e69 127
70ea1e69
MN
128static void build_frame_code(AVFormatContext *s){
129 NUTContext *nut = s->priv_data;
130 int key_frame, index, pred, stream_id;
131 int start=1;
132 int end= 254;
133 int keyframe_0_esc= s->nb_streams > 2;
134 int pred_table[10];
0fcfa8eb
MN
135 FrameCode *ft;
136
137 ft= &nut->frame_code[start];
138 ft->flags= FLAG_CODED;
139 ft->size_mul=1;
140 ft->pts_delta=1;
141 start++;
70ea1e69
MN
142
143 if(keyframe_0_esc){
144 /* keyframe = 0 escape */
145 FrameCode *ft= &nut->frame_code[start];
146 ft->flags= FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
147 ft->size_mul=1;
148 start++;
149 }
150
151 for(stream_id= 0; stream_id<s->nb_streams; stream_id++){
152 int start2= start + (end-start)*stream_id / s->nb_streams;
153 int end2 = start + (end-start)*(stream_id+1) / s->nb_streams;
154 AVCodecContext *codec = s->streams[stream_id]->codec;
72415b2a 155 int is_audio= codec->codec_type == AVMEDIA_TYPE_AUDIO;
70ea1e69
MN
156 int intra_only= /*codec->intra_only || */is_audio;
157 int pred_count;
158
159 for(key_frame=0; key_frame<2; key_frame++){
160 if(intra_only && keyframe_0_esc && key_frame==0)
161 continue;
162
163 {
164 FrameCode *ft= &nut->frame_code[start2];
165 ft->flags= FLAG_KEY*key_frame;
166 ft->flags|= FLAG_SIZE_MSB | FLAG_CODED_PTS;
167 ft->stream_id= stream_id;
168 ft->size_mul=1;
a712d725
MN
169 if(is_audio)
170 ft->header_idx= find_header_idx(s, codec, -1, key_frame);
70ea1e69
MN
171 start2++;
172 }
173 }
174
175 key_frame= intra_only;
176#if 1
177 if(is_audio){
178 int frame_bytes= codec->frame_size*(int64_t)codec->bit_rate / (8*codec->sample_rate);
179 int pts;
180 for(pts=0; pts<2; pts++){
181 for(pred=0; pred<2; pred++){
182 FrameCode *ft= &nut->frame_code[start2];
183 ft->flags= FLAG_KEY*key_frame;
184 ft->stream_id= stream_id;
185 ft->size_mul=frame_bytes + 2;
186 ft->size_lsb=frame_bytes + pred;
187 ft->pts_delta=pts;
a712d725 188 ft->header_idx= find_header_idx(s, codec, frame_bytes + pred, key_frame);
70ea1e69
MN
189 start2++;
190 }
191 }
192 }else{
193 FrameCode *ft= &nut->frame_code[start2];
194 ft->flags= FLAG_KEY | FLAG_SIZE_MSB;
195 ft->stream_id= stream_id;
196 ft->size_mul=1;
197 ft->pts_delta=1;
198 start2++;
199 }
200#endif
201
202 if(codec->has_b_frames){
203 pred_count=5;
204 pred_table[0]=-2;
205 pred_table[1]=-1;
206 pred_table[2]=1;
207 pred_table[3]=3;
208 pred_table[4]=4;
209 }else if(codec->codec_id == CODEC_ID_VORBIS){
210 pred_count=3;
211 pred_table[0]=2;
212 pred_table[1]=9;
213 pred_table[2]=16;
214 }else{
215 pred_count=1;
216 pred_table[0]=1;
217 }
218
219 for(pred=0; pred<pred_count; pred++){
220 int start3= start2 + (end2-start2)*pred / pred_count;
221 int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
222
223 for(index=start3; index<end3; index++){
224 FrameCode *ft= &nut->frame_code[index];
225 ft->flags= FLAG_KEY*key_frame;
226 ft->flags|= FLAG_SIZE_MSB;
227 ft->stream_id= stream_id;
228//FIXME use single byte size and pred from last
229 ft->size_mul= end3-start3;
230 ft->size_lsb= index - start3;
231 ft->pts_delta= pred_table[pred];
a712d725
MN
232 if(is_audio)
233 ft->header_idx= find_header_idx(s, codec, -1, key_frame);
70ea1e69
MN
234 }
235 }
236 }
237 memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N'));
238 nut->frame_code[ 0].flags=
239 nut->frame_code[255].flags=
240 nut->frame_code['N'].flags= FLAG_INVALID;
241}
242
243/**
244 * Gets the length in bytes which is needed to store val as v.
245 */
246static int get_length(uint64_t val){
247 int i=1;
248
249 while(val>>=7)
250 i++;
251
252 return i;
253}
254
255static void put_v(ByteIOContext *bc, uint64_t val){
256 int i= get_length(val);
257
258 while(--i>0)
259 put_byte(bc, 128 | (val>>(7*i)));
260
261 put_byte(bc, val&127);
262}
263
52afa376 264static void put_tt(NUTContext *nut, StreamContext *nus, ByteIOContext *bc, uint64_t val){
491216c6
MN
265 val *= nut->time_base_count;
266 val += nus->time_base - nut->time_base;
267 put_v(bc, val);
268}
269
70ea1e69 270/**
93951943 271 * Stores a string as vb.
70ea1e69
MN
272 */
273static void put_str(ByteIOContext *bc, const char *string){
274 int len= strlen(string);
275
276 put_v(bc, len);
277 put_buffer(bc, string, len);
278}
279
280static void put_s(ByteIOContext *bc, int64_t val){
281 put_v(bc, 2*FFABS(val) - (val>0));
282}
283
284#ifdef TRACE
285static inline void put_v_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){
7a26da44 286 av_log(NULL, AV_LOG_DEBUG, "put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
70ea1e69
MN
287
288 put_v(bc, v);
289}
290
291static inline void put_s_trace(ByteIOContext *bc, int64_t v, char *file, char *func, int line){
7a26da44 292 av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
70ea1e69
MN
293
294 put_s(bc, v);
295}
296#define put_v(bc, v) put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
297#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
298#endif
299
34f8cc38 300//FIXME remove calculate_checksum
f0a9978c 301static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum, uint64_t startcode){
8d9a3f7e
MN
302 uint8_t *dyn_buf=NULL;
303 int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
6c666941
MN
304 int forw_ptr= dyn_size + 4*calculate_checksum;
305
306 if(forw_ptr > 4096)
992e78f5 307 init_checksum(bc, ff_crc04C11DB7_update, 0);
f0a9978c 308 put_be64(bc, startcode);
6c666941
MN
309 put_v(bc, forw_ptr);
310 if(forw_ptr > 4096)
311 put_le32(bc, get_checksum(bc));
70ea1e69
MN
312
313 if(calculate_checksum)
992e78f5 314 init_checksum(bc, ff_crc04C11DB7_update, 0);
8d9a3f7e 315 put_buffer(bc, dyn_buf, dyn_size);
70ea1e69 316 if(calculate_checksum)
8d9a3f7e 317 put_le32(bc, get_checksum(bc));
70ea1e69 318
8d9a3f7e 319 av_free(dyn_buf);
70ea1e69
MN
320}
321
97d5eb11 322static void write_mainheader(NUTContext *nut, ByteIOContext *bc){
a712d725
MN
323 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, tmp_head_idx;
324 int64_t tmp_match;
70ea1e69 325
a17e046a 326 put_v(bc, 3); /* version */
97d5eb11 327 put_v(bc, nut->avf->nb_streams);
82badd27 328 put_v(bc, nut->max_distance);
70ea1e69
MN
329 put_v(bc, nut->time_base_count);
330
331 for(i=0; i<nut->time_base_count; i++){
332 put_v(bc, nut->time_base[i].num);
333 put_v(bc, nut->time_base[i].den);
334 }
335
70ea1e69
MN
336 tmp_pts=0;
337 tmp_mul=1;
338 tmp_stream=0;
a712d725
MN
339 tmp_match= 1-(1LL<<62);
340 tmp_head_idx= 0;
70ea1e69
MN
341 for(i=0; i<256;){
342 tmp_fields=0;
343 tmp_size=0;
344// tmp_res=0;
345 if(tmp_pts != nut->frame_code[i].pts_delta) tmp_fields=1;
346 if(tmp_mul != nut->frame_code[i].size_mul ) tmp_fields=2;
347 if(tmp_stream != nut->frame_code[i].stream_id) tmp_fields=3;
348 if(tmp_size != nut->frame_code[i].size_lsb ) tmp_fields=4;
349// if(tmp_res != nut->frame_code[i].res ) tmp_fields=5;
a712d725 350 if(tmp_head_idx!=nut->frame_code[i].header_idx)tmp_fields=8;
70ea1e69
MN
351
352 tmp_pts = nut->frame_code[i].pts_delta;
353 tmp_flags = nut->frame_code[i].flags;
354 tmp_stream= nut->frame_code[i].stream_id;
355 tmp_mul = nut->frame_code[i].size_mul;
356 tmp_size = nut->frame_code[i].size_lsb;
357// tmp_res = nut->frame_code[i].res;
a712d725 358 tmp_head_idx= nut->frame_code[i].header_idx;
70ea1e69
MN
359
360 for(j=0; i<256; j++,i++){
361 if(i == 'N'){
362 j--;
363 continue;
364 }
365 if(nut->frame_code[i].pts_delta != tmp_pts ) break;
366 if(nut->frame_code[i].flags != tmp_flags ) break;
367 if(nut->frame_code[i].stream_id != tmp_stream) break;
368 if(nut->frame_code[i].size_mul != tmp_mul ) break;
369 if(nut->frame_code[i].size_lsb != tmp_size+j) break;
370// if(nut->frame_code[i].res != tmp_res ) break;
a712d725 371 if(nut->frame_code[i].header_idx!= tmp_head_idx) break;
70ea1e69
MN
372 }
373 if(j != tmp_mul - tmp_size) tmp_fields=6;
374
375 put_v(bc, tmp_flags);
376 put_v(bc, tmp_fields);
377 if(tmp_fields>0) put_s(bc, tmp_pts);
378 if(tmp_fields>1) put_v(bc, tmp_mul);
379 if(tmp_fields>2) put_v(bc, tmp_stream);
380 if(tmp_fields>3) put_v(bc, tmp_size);
381 if(tmp_fields>4) put_v(bc, 0 /*tmp_res*/);
382 if(tmp_fields>5) put_v(bc, j);
a712d725
MN
383 if(tmp_fields>6) put_v(bc, tmp_match);
384 if(tmp_fields>7) put_v(bc, tmp_head_idx);
385 }
386 put_v(bc, nut->header_count-1);
387 for(i=1; i<nut->header_count; i++){
388 put_v(bc, nut->header_len[i]);
389 put_buffer(bc, nut->header[i], nut->header_len[i]);
70ea1e69 390 }
97d5eb11 391}
70ea1e69 392
59729451
AJ
393static int write_streamheader(NUTContext *nut, ByteIOContext *bc, AVStream *st, int i){
394 AVCodecContext *codec = st->codec;
0809b51e
MN
395 put_v(bc, i);
396 switch(codec->codec_type){
72415b2a
SS
397 case AVMEDIA_TYPE_VIDEO: put_v(bc, 0); break;
398 case AVMEDIA_TYPE_AUDIO: put_v(bc, 1); break;
399 case AVMEDIA_TYPE_SUBTITLE: put_v(bc, 2); break;
0809b51e
MN
400 default : put_v(bc, 3); break;
401 }
402 put_v(bc, 4);
403 if (codec->codec_tag){
404 put_le32(bc, codec->codec_tag);
405 }else
406 return -1;
407
6e6cf116 408 put_v(bc, nut->stream[i].time_base - nut->time_base);
0809b51e
MN
409 put_v(bc, nut->stream[i].msb_pts_shift);
410 put_v(bc, nut->stream[i].max_pts_distance);
411 put_v(bc, codec->has_b_frames);
412 put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
413
414 put_v(bc, codec->extradata_size);
415 put_buffer(bc, codec->extradata, codec->extradata_size);
416
417 switch(codec->codec_type){
72415b2a 418 case AVMEDIA_TYPE_AUDIO:
0809b51e
MN
419 put_v(bc, codec->sample_rate);
420 put_v(bc, 1);
421 put_v(bc, codec->channels);
422 break;
72415b2a 423 case AVMEDIA_TYPE_VIDEO:
0809b51e
MN
424 put_v(bc, codec->width);
425 put_v(bc, codec->height);
0a5790d1 426
59729451 427 if(st->sample_aspect_ratio.num<=0 || st->sample_aspect_ratio.den<=0){
0a5790d1
MN
428 put_v(bc, 0);
429 put_v(bc, 0);
430 }else{
59729451
AJ
431 put_v(bc, st->sample_aspect_ratio.num);
432 put_v(bc, st->sample_aspect_ratio.den);
0a5790d1 433 }
0809b51e
MN
434 put_v(bc, 0); /* csp type -- unknown */
435 break;
436 default:
437 break;
438 }
439 return 0;
440}
441
4cf97abb 442static int add_info(ByteIOContext *bc, const char *type, const char *value){
ead1939f
MN
443 put_str(bc, type);
444 put_s(bc, -1);
445 put_str(bc, value);
446 return 1;
447}
448
899681cd 449static int write_globalinfo(NUTContext *nut, ByteIOContext *bc){
ead1939f 450 AVFormatContext *s= nut->avf;
43382b5f 451 AVMetadataTag *t = NULL;
899681cd 452 ByteIOContext *dyn_bc;
ead1939f
MN
453 uint8_t *dyn_buf=NULL;
454 int count=0, dyn_size;
899681cd
BA
455 int ret = url_open_dyn_buf(&dyn_bc);
456 if(ret < 0)
457 return ret;
ead1939f 458
43382b5f
AK
459 while ((t = av_metadata_get(s->metadata, "", t, AV_METADATA_IGNORE_SUFFIX)))
460 count += add_info(dyn_bc, t->key, t->value);
ead1939f
MN
461
462 put_v(bc, 0); //stream_if_plus1
463 put_v(bc, 0); //chapter_id
464 put_v(bc, 0); //timestamp_start
465 put_v(bc, 0); //length
466
467 put_v(bc, count);
468
899681cd 469 dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
ead1939f
MN
470 put_buffer(bc, dyn_buf, dyn_size);
471 av_free(dyn_buf);
899681cd 472 return 0;
ead1939f
MN
473}
474
90c2295b
ES
475static int write_streaminfo(NUTContext *nut, ByteIOContext *bc, int stream_id){
476 AVFormatContext *s= nut->avf;
477 AVStream* st = s->streams[stream_id];
478 ByteIOContext *dyn_bc;
479 uint8_t *dyn_buf=NULL;
480 int count=0, dyn_size, i;
481 int ret = url_open_dyn_buf(&dyn_bc);
482 if(ret < 0)
483 return ret;
484
485 for (i=0; ff_nut_dispositions[i].flag; ++i) {
486 if (st->disposition & ff_nut_dispositions[i].flag)
487 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
488 }
489 dyn_size = url_close_dyn_buf(dyn_bc, &dyn_buf);
490
491 if (count) {
492 put_v(bc, stream_id + 1); //stream_id_plus1
493 put_v(bc, 0); //chapter_id
494 put_v(bc, 0); //timestamp_start
495 put_v(bc, 0); //length
496
497 put_v(bc, count);
498
499 put_buffer(bc, dyn_buf, dyn_size);
500 }
501
502 av_free(dyn_buf);
503 return count;
504}
505
899681cd
BA
506static int write_headers(NUTContext *nut, ByteIOContext *bc){
507 ByteIOContext *dyn_bc;
508 int i, ret;
7e506494 509
899681cd
BA
510 ret = url_open_dyn_buf(&dyn_bc);
511 if(ret < 0)
512 return ret;
513 write_mainheader(nut, dyn_bc);
514 put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE);
7e506494
MN
515
516 for (i=0; i < nut->avf->nb_streams; i++){
899681cd
BA
517 ret = url_open_dyn_buf(&dyn_bc);
518 if(ret < 0)
519 return ret;
59729451 520 write_streamheader(nut, dyn_bc, nut->avf->streams[i], i);
899681cd 521 put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE);
7e506494 522 }
ead1939f 523
899681cd
BA
524 ret = url_open_dyn_buf(&dyn_bc);
525 if(ret < 0)
526 return ret;
527 write_globalinfo(nut, dyn_bc);
528 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
14b3f996 529
90c2295b
ES
530 for (i = 0; i < nut->avf->nb_streams; i++) {
531 ret = url_open_dyn_buf(&dyn_bc);
532 if(ret < 0)
533 return ret;
534 ret = write_streaminfo(nut, dyn_bc, i);
535 if (ret < 0)
536 return ret;
537 if (ret > 0)
538 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
539 else {
540 uint8_t* buf;
541 url_close_dyn_buf(dyn_bc, &buf);
542 av_free(buf);
543 }
544 }
545
14b3f996
MN
546 nut->last_syncpoint_pos= INT_MIN;
547 nut->header_count++;
899681cd 548 return 0;
7e506494
MN
549}
550
97d5eb11
MN
551static int write_header(AVFormatContext *s){
552 NUTContext *nut = s->priv_data;
899681cd 553 ByteIOContext *bc = s->pb;
97d5eb11
MN
554 int i, j;
555
556 nut->avf= s;
557
558 nut->stream = av_mallocz(sizeof(StreamContext)*s->nb_streams);
559 nut->time_base= av_mallocz(sizeof(AVRational )*s->nb_streams);
560
561 for(i=0; i<s->nb_streams; i++){
562 AVStream *st= s->streams[i];
563 int ssize;
564 AVRational time_base;
565 ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num);
566
567 av_set_pts_info(st, 64, time_base.num, time_base.den);
568
569 for(j=0; j<nut->time_base_count; j++){
570 if(!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))){
571 break;
572 }
573 }
574 nut->time_base[j]= time_base;
575 nut->stream[i].time_base= &nut->time_base[j];
576 if(j==nut->time_base_count)
577 nut->time_base_count++;
578
579 if(av_q2d(time_base) >= 0.001)
580 nut->stream[i].msb_pts_shift = 7;
581 else
582 nut->stream[i].msb_pts_shift = 14;
583 nut->stream[i].max_pts_distance= FFMAX(1/av_q2d(time_base), 1);
584 }
585
82badd27 586 nut->max_distance = MAX_DISTANCE;
a712d725 587 build_elision_headers(s);
97d5eb11
MN
588 build_frame_code(s);
589 assert(nut->frame_code['N'].flags == FLAG_INVALID);
590
591 put_buffer(bc, ID_STRING, strlen(ID_STRING));
592 put_byte(bc, 0);
593
7e506494 594 write_headers(nut, bc);
dcc9bde0 595
70ea1e69
MN
596 put_flush_packet(bc);
597
14b3f996 598 //FIXME index
70ea1e69
MN
599
600 return 0;
601}
602
e1249ba9
MN
603static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, AVPacket *pkt){
604 int flags= 0;
605
606 if(pkt->flags & PKT_FLAG_KEY ) flags |= FLAG_KEY;
607 if(pkt->stream_index != fc->stream_id ) flags |= FLAG_STREAM_ID;
608 if(pkt->size / fc->size_mul ) flags |= FLAG_SIZE_MSB;
609 if(pkt->pts - nus->last_pts != fc->pts_delta) flags |= FLAG_CODED_PTS;
610 if(pkt->size > 2*nut->max_distance ) flags |= FLAG_CHECKSUM;
611 if(FFABS(pkt->pts - nus->last_pts)
612 > nus->max_pts_distance) flags |= FLAG_CHECKSUM;
a712d725
MN
613 if( pkt->size < nut->header_len[fc->header_idx]
614 || (pkt->size > 4096 && fc->header_idx)
615 || memcmp(pkt->data, nut->header[fc->header_idx], nut->header_len[fc->header_idx]))
616 flags |= FLAG_HEADER_IDX;
e1249ba9 617
d2062ff6 618 return flags | (fc->flags & FLAG_CODED);
e1249ba9
MN
619}
620
a712d725
MN
621static int find_best_header_idx(NUTContext *nut, AVPacket *pkt){
622 int i;
623 int best_i = 0;
624 int best_len= 0;
625
626 if(pkt->size > 4096)
627 return 0;
628
629 for(i=1; i<nut->header_count; i++){
630 if( pkt->size >= nut->header_len[i]
631 && nut->header_len[i] > best_len
632 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])){
633 best_i= i;
634 best_len= nut->header_len[i];
635 }
636 }
637 return best_i;
638}
639
70ea1e69 640static int write_packet(AVFormatContext *s, AVPacket *pkt){
e1249ba9
MN
641 NUTContext *nut = s->priv_data;
642 StreamContext *nus= &nut->stream[pkt->stream_index];
899681cd 643 ByteIOContext *bc = s->pb, *dyn_bc;
e1249ba9
MN
644 FrameCode *fc;
645 int64_t coded_pts;
a712d725 646 int best_length, frame_code, flags, needed_flags, i, header_idx, best_header_idx;
e1249ba9
MN
647 int key_frame = !!(pkt->flags & PKT_FLAG_KEY);
648 int store_sp=0;
899681cd 649 int ret;
e1249ba9 650
f53dd468
MN
651 if(pkt->pts < 0)
652 return -1;
653
14b3f996
MN
654 if(1LL<<(20+3*nut->header_count) <= url_ftell(bc))
655 write_headers(nut, bc);
656
02c986a8 657 if(key_frame && !(nus->last_flags & FLAG_KEY))
e1249ba9
MN
658 store_sp= 1;
659
660 if(pkt->size + 30/*FIXME check*/ + url_ftell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
661 store_sp= 1;
662
93951943 663//FIXME: Ensure store_sp is 1 in the first place.
e1249ba9
MN
664
665 if(store_sp){
52afa376 666 Syncpoint *sp, dummy= {.pos= INT64_MAX};
7c04134f 667
e1249ba9 668 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
7c04134f
MN
669 for(i=0; i<s->nb_streams; i++){
670 AVStream *st= s->streams[i];
4ddcc983
OS
671 int64_t dts_tb = av_rescale_rnd(pkt->dts,
672 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
673 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
674 AV_ROUND_DOWN);
675 int index= av_index_search_timestamp(st, dts_tb, AVSEEK_FLAG_BACKWARD);
175e23e8 676 if(index>=0) dummy.pos= FFMIN(dummy.pos, st->index_entries[index].pos);
7c04134f 677 }
175e23e8
MN
678 if(dummy.pos == INT64_MAX)
679 dummy.pos= 0;
f990f6e3
VS
680 sp= av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp,
681 NULL);
e1249ba9
MN
682
683 nut->last_syncpoint_pos= url_ftell(bc);
899681cd
BA
684 ret = url_open_dyn_buf(&dyn_bc);
685 if(ret < 0)
686 return ret;
52afa376 687 put_tt(nut, nus, dyn_bc, pkt->dts);
899681cd
BA
688 put_v(dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos)>>4 : 0);
689 put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
7c04134f
MN
690
691 ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0/*unused*/, pkt->dts);
e1249ba9
MN
692 }
693 assert(nus->last_pts != AV_NOPTS_VALUE);
694
695 coded_pts = pkt->pts & ((1<<nus->msb_pts_shift)-1);
696 if(ff_lsb2full(nus, coded_pts) != pkt->pts)
697 coded_pts= pkt->pts + (1<<nus->msb_pts_shift);
698
a712d725
MN
699 best_header_idx= find_best_header_idx(nut, pkt);
700
e1249ba9
MN
701 best_length=INT_MAX;
702 frame_code= -1;
703 for(i=0; i<256; i++){
704 int length= 0;
705 FrameCode *fc= &nut->frame_code[i];
706 int flags= fc->flags;
707
708 if(flags & FLAG_INVALID)
709 continue;
710 needed_flags= get_needed_flags(nut, nus, fc, pkt);
711
712 if(flags & FLAG_CODED){
713 length++;
63dd9d0e 714 flags = needed_flags;
e1249ba9
MN
715 }
716
717 if((flags & needed_flags) != needed_flags)
718 continue;
719
720 if((flags ^ needed_flags) & FLAG_KEY)
721 continue;
722
723 if(flags & FLAG_STREAM_ID)
724 length+= get_length(pkt->stream_index);
725
726 if(pkt->size % fc->size_mul != fc->size_lsb)
727 continue;
728 if(flags & FLAG_SIZE_MSB)
729 length += get_length(pkt->size / fc->size_mul);
730
731 if(flags & FLAG_CHECKSUM)
732 length+=4;
733
734 if(flags & FLAG_CODED_PTS)
735 length += get_length(coded_pts);
736
a712d725
MN
737 if( (flags & FLAG_CODED)
738 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx]+1){
739 flags |= FLAG_HEADER_IDX;
740 }
741
742 if(flags & FLAG_HEADER_IDX){
743 length += 1 - nut->header_len[best_header_idx];
744 }else{
745 length -= nut->header_len[fc->header_idx];
746 }
747
e1249ba9
MN
748 length*=4;
749 length+= !(flags & FLAG_CODED_PTS);
750 length+= !(flags & FLAG_CHECKSUM);
751
752 if(length < best_length){
753 best_length= length;
754 frame_code=i;
755 }
756 }
757 assert(frame_code != -1);
758 fc= &nut->frame_code[frame_code];
759 flags= fc->flags;
760 needed_flags= get_needed_flags(nut, nus, fc, pkt);
a712d725 761 header_idx= fc->header_idx;
e1249ba9 762
992e78f5 763 init_checksum(bc, ff_crc04C11DB7_update, 0);
e1249ba9
MN
764 put_byte(bc, frame_code);
765 if(flags & FLAG_CODED){
766 put_v(bc, (flags^needed_flags) & ~(FLAG_CODED));
767 flags = needed_flags;
768 }
769 if(flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index);
770 if(flags & FLAG_CODED_PTS) put_v(bc, coded_pts);
771 if(flags & FLAG_SIZE_MSB) put_v(bc, pkt->size / fc->size_mul);
a712d725 772 if(flags & FLAG_HEADER_IDX) put_v(bc, header_idx= best_header_idx);
e1249ba9
MN
773
774 if(flags & FLAG_CHECKSUM) put_le32(bc, get_checksum(bc));
775 else get_checksum(bc);
776
a712d725 777 put_buffer(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
e1249ba9 778 nus->last_flags= flags;
e942293d 779 nus->last_pts= pkt->pts;
7c04134f
MN
780
781 //FIXME just store one per syncpoint
782 if(flags & FLAG_KEY)
783 av_add_index_entry(
784 s->streams[pkt->stream_index],
785 nut->last_syncpoint_pos,
786 pkt->pts,
787 0,
788 0,
789 AVINDEX_KEYFRAME);
790
70ea1e69
MN
791 return 0;
792}
793
bd533e6c
MN
794static int write_trailer(AVFormatContext *s){
795 NUTContext *nut= s->priv_data;
899681cd 796 ByteIOContext *bc= s->pb;
bd533e6c 797
14b3f996
MN
798 while(nut->header_count<3)
799 write_headers(nut, bc);
bd533e6c 800 put_flush_packet(bc);
4b83fc0f 801 ff_nut_free_sp(nut);
27dbc47c
VS
802 av_freep(&nut->stream);
803 av_freep(&nut->time_base);
bd533e6c
MN
804
805 return 0;
806}
807
70ea1e69
MN
808AVOutputFormat nut_muxer = {
809 "nut",
bde15e74 810 NULL_IF_CONFIG_SMALL("NUT format"),
70ea1e69
MN
811 "video/x-nut",
812 "nut",
813 sizeof(NUTContext),
b250f9c6 814#if CONFIG_LIBVORBIS
70ea1e69 815 CODEC_ID_VORBIS,
b250f9c6 816#elif CONFIG_LIBMP3LAME
70ea1e69
MN
817 CODEC_ID_MP3,
818#else
2d47c3de 819 CODEC_ID_MP2,
70ea1e69
MN
820#endif
821 CODEC_ID_MPEG4,
822 write_header,
823 write_packet,
bd533e6c 824 write_trailer,
25918212 825 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
1a40491e 826 .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, ff_nut_subtitle_tags, 0},
43382b5f 827 .metadata_conv = ff_nut_metadata_conv,
70ea1e69 828};