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 <stdint.h>
23
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/tree.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/avassert.h"
29 #include "libavutil/time.h"
30 #include "libavutil/opt.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/mpegaudiodata.h"
33 #include "nut.h"
34 #include "internal.h"
35 #include "avio_internal.h"
36 #include "riff.h"
37
find_expected_header(AVCodecParameters * p,int size,int key_frame,uint8_t out[64])38 static int find_expected_header(AVCodecParameters *p, int size, int key_frame,
39 uint8_t out[64])
40 {
41 int sample_rate = p->sample_rate;
42
43 if (size > 4096)
44 return 0;
45
46 AV_WB24(out, 1);
47
48 if (p->codec_id == AV_CODEC_ID_MPEG4) {
49 if (key_frame) {
50 return 3;
51 } else {
52 out[3] = 0xB6;
53 return 4;
54 }
55 } else if (p->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
56 p->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
57 return 3;
58 } else if (p->codec_id == AV_CODEC_ID_H264) {
59 return 3;
60 } else if (p->codec_id == AV_CODEC_ID_MP3 ||
61 p->codec_id == AV_CODEC_ID_MP2) {
62 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
63 int layer = p->codec_id == AV_CODEC_ID_MP3 ? 3 : 2;
64 unsigned int header = 0xFFF00000;
65
66 lsf = sample_rate < (24000 + 32000) / 2;
67 mpeg25 = sample_rate < (12000 + 16000) / 2;
68 sample_rate <<= lsf + mpeg25;
69 if (sample_rate < (32000 + 44100) / 2) sample_rate_index = 2;
70 else if (sample_rate < (44100 + 48000) / 2) sample_rate_index = 0;
71 else sample_rate_index = 1;
72
73 sample_rate = avpriv_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25);
74
75 for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) {
76 frame_size =
77 avpriv_mpa_bitrate_tab[lsf][layer - 1][bitrate_index >> 1];
78 frame_size = (frame_size * 144000) / (sample_rate << lsf) +
79 (bitrate_index & 1);
80
81 if (frame_size == size)
82 break;
83 }
84
85 header |= (!lsf) << 19;
86 header |= (4 - layer) << 17;
87 header |= 1 << 16; //no crc
88 AV_WB32(out, header);
89 if (size <= 0)
90 return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead
91 if (bitrate_index == 30)
92 return -1; //something is wrong ...
93
94 header |= (bitrate_index >> 1) << 12;
95 header |= sample_rate_index << 10;
96 header |= (bitrate_index & 1) << 9;
97
98 return 2; //FIXME actually put the needed ones in build_elision_headers()
99 //return 3; //we guess that the private bit is not set
100 //FIXME the above assumptions should be checked, if these turn out false too often something should be done
101 }
102 return 0;
103 }
104
find_header_idx(AVFormatContext * s,AVCodecParameters * p,int size,int frame_type)105 static int find_header_idx(AVFormatContext *s, AVCodecParameters *p, int size,
106 int frame_type)
107 {
108 NUTContext *nut = s->priv_data;
109 uint8_t out[64];
110 int i;
111 int len = find_expected_header(p, size, frame_type, out);
112
113 for (i = 1; i < nut->header_count; i++) {
114 if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) {
115 return i;
116 }
117 }
118
119 return 0;
120 }
121
build_elision_headers(AVFormatContext * s)122 static void build_elision_headers(AVFormatContext *s)
123 {
124 NUTContext *nut = s->priv_data;
125 int i;
126 //FIXME this is lame
127 //FIXME write a 2pass mode to find the maximal headers
128 static const uint8_t headers[][5] = {
129 { 3, 0x00, 0x00, 0x01 },
130 { 4, 0x00, 0x00, 0x01, 0xB6},
131 { 2, 0xFF, 0xFA }, //mp3+crc
132 { 2, 0xFF, 0xFB }, //mp3
133 { 2, 0xFF, 0xFC }, //mp2+crc
134 { 2, 0xFF, 0xFD }, //mp2
135 };
136
137 nut->header_count = 7;
138 for (i = 1; i < nut->header_count; i++) {
139 nut->header_len[i] = headers[i - 1][0];
140 nut->header[i] = &headers[i - 1][1];
141 }
142 }
143
build_frame_code(AVFormatContext * s)144 static void build_frame_code(AVFormatContext *s)
145 {
146 NUTContext *nut = s->priv_data;
147 int key_frame, index, pred, stream_id;
148 int start = 1;
149 int end = 254;
150 int keyframe_0_esc = s->nb_streams > 2;
151 int pred_table[10];
152 FrameCode *ft;
153
154 ft = &nut->frame_code[start];
155 ft->flags = FLAG_CODED;
156 ft->size_mul = 1;
157 ft->pts_delta = 1;
158 start++;
159
160 if (keyframe_0_esc) {
161 /* keyframe = 0 escape */
162 FrameCode *ft = &nut->frame_code[start];
163 ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
164 ft->size_mul = 1;
165 start++;
166 }
167
168 for (stream_id = 0; stream_id < s->nb_streams; stream_id++) {
169 int start2 = start + (end - start) * stream_id / s->nb_streams;
170 int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams;
171 AVCodecParameters *par = s->streams[stream_id]->codecpar;
172 int is_audio = par->codec_type == AVMEDIA_TYPE_AUDIO;
173 int intra_only = /*codec->intra_only || */ is_audio;
174 int pred_count;
175 int frame_size = 0;
176
177 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
178 frame_size = av_get_audio_frame_duration2(par, 0);
179 if (par->codec_id == AV_CODEC_ID_VORBIS && !frame_size)
180 frame_size = 64;
181 } else {
182 AVRational f = av_div_q(av_inv_q(s->streams[stream_id]->avg_frame_rate), *nut->stream[stream_id].time_base);
183 if (f.den == 1 && f.num>0)
184 frame_size = f.num;
185 }
186 if (!frame_size)
187 frame_size = 1;
188
189 for (key_frame = 0; key_frame < 2; key_frame++) {
190 if (!intra_only || !keyframe_0_esc || key_frame != 0) {
191 FrameCode *ft = &nut->frame_code[start2];
192 ft->flags = FLAG_KEY * key_frame;
193 ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS;
194 ft->stream_id = stream_id;
195 ft->size_mul = 1;
196 if (is_audio)
197 ft->header_idx = find_header_idx(s, par, -1, key_frame);
198 start2++;
199 }
200 }
201
202 key_frame = intra_only;
203 #if 1
204 if (is_audio) {
205 int frame_bytes;
206 int pts;
207
208 if (par->block_align > 0) {
209 frame_bytes = par->block_align;
210 } else {
211 int frame_size = av_get_audio_frame_duration2(par, 0);
212 frame_bytes = frame_size * (int64_t)par->bit_rate / (8 * par->sample_rate);
213 }
214
215 for (pts = 0; pts < 2; pts++) {
216 for (pred = 0; pred < 2; pred++) {
217 FrameCode *ft = &nut->frame_code[start2];
218 ft->flags = FLAG_KEY * key_frame;
219 ft->stream_id = stream_id;
220 ft->size_mul = frame_bytes + 2;
221 ft->size_lsb = frame_bytes + pred;
222 ft->pts_delta = pts * frame_size;
223 ft->header_idx = find_header_idx(s, par, frame_bytes + pred, key_frame);
224 start2++;
225 }
226 }
227 } else {
228 FrameCode *ft = &nut->frame_code[start2];
229 ft->flags = FLAG_KEY | FLAG_SIZE_MSB;
230 ft->stream_id = stream_id;
231 ft->size_mul = 1;
232 ft->pts_delta = frame_size;
233 start2++;
234 }
235 #endif
236
237 if (par->video_delay) {
238 pred_count = 5;
239 pred_table[0] = -2;
240 pred_table[1] = -1;
241 pred_table[2] = 1;
242 pred_table[3] = 3;
243 pred_table[4] = 4;
244 } else if (par->codec_id == AV_CODEC_ID_VORBIS) {
245 pred_count = 3;
246 pred_table[0] = 2;
247 pred_table[1] = 9;
248 pred_table[2] = 16;
249 } else {
250 pred_count = 1;
251 pred_table[0] = 1;
252 }
253
254 for (pred = 0; pred < pred_count; pred++) {
255 int start3 = start2 + (end2 - start2) * pred / pred_count;
256 int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count;
257
258 pred_table[pred] *= frame_size;
259
260 for (index = start3; index < end3; index++) {
261 FrameCode *ft = &nut->frame_code[index];
262 ft->flags = FLAG_KEY * key_frame;
263 ft->flags |= FLAG_SIZE_MSB;
264 ft->stream_id = stream_id;
265 //FIXME use single byte size and pred from last
266 ft->size_mul = end3 - start3;
267 ft->size_lsb = index - start3;
268 ft->pts_delta = pred_table[pred];
269 if (is_audio)
270 ft->header_idx = find_header_idx(s, par, -1, key_frame);
271 }
272 }
273 }
274 memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N'));
275 nut->frame_code[0].flags =
276 nut->frame_code[255].flags =
277 nut->frame_code['N'].flags = FLAG_INVALID;
278 }
279
put_tt(NUTContext * nut,AVRational * time_base,AVIOContext * bc,uint64_t val)280 static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
281 {
282 val *= nut->time_base_count;
283 val += time_base - nut->time_base;
284 ff_put_v(bc, val);
285 }
286 /**
287 * Store a string as vb.
288 */
put_str(AVIOContext * bc,const char * string)289 static void put_str(AVIOContext *bc, const char *string)
290 {
291 size_t len = strlen(string);
292
293 ff_put_v(bc, len);
294 avio_write(bc, string, len);
295 }
296
put_s(AVIOContext * bc,int64_t val)297 static void put_s(AVIOContext *bc, int64_t val)
298 {
299 ff_put_v(bc, 2 * FFABS(val) - (val > 0));
300 }
301
302 //FIXME remove calculate_checksum
put_packet(NUTContext * nut,AVIOContext * bc,AVIOContext * dyn_bc,int calculate_checksum,uint64_t startcode)303 static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc,
304 int calculate_checksum, uint64_t startcode)
305 {
306 uint8_t *dyn_buf = NULL;
307 int dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
308 int forw_ptr = dyn_size + 4 * calculate_checksum;
309
310 if (forw_ptr > 4096)
311 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
312 avio_wb64(bc, startcode);
313 ff_put_v(bc, forw_ptr);
314 if (forw_ptr > 4096)
315 avio_wl32(bc, ffio_get_checksum(bc));
316
317 if (calculate_checksum)
318 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
319 avio_write(bc, dyn_buf, dyn_size);
320 if (calculate_checksum)
321 avio_wl32(bc, ffio_get_checksum(bc));
322
323 av_free(dyn_buf);
324 }
325
write_mainheader(NUTContext * nut,AVIOContext * bc)326 static void write_mainheader(NUTContext *nut, AVIOContext *bc)
327 {
328 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
329 tmp_head_idx;
330 int64_t tmp_match;
331
332 ff_put_v(bc, nut->version);
333 if (nut->version > 3)
334 ff_put_v(bc, nut->minor_version = 1);
335 ff_put_v(bc, nut->avf->nb_streams);
336 ff_put_v(bc, nut->max_distance);
337 ff_put_v(bc, nut->time_base_count);
338
339 for (i = 0; i < nut->time_base_count; i++) {
340 ff_put_v(bc, nut->time_base[i].num);
341 ff_put_v(bc, nut->time_base[i].den);
342 }
343
344 tmp_pts = 0;
345 tmp_mul = 1;
346 tmp_stream = 0;
347 tmp_match = 1 - (1LL << 62);
348 tmp_head_idx = 0;
349 for (i = 0; i < 256; ) {
350 tmp_fields = 0;
351 tmp_size = 0;
352 // tmp_res=0;
353 if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1;
354 if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2;
355 if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3;
356 if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4;
357 // if (tmp_res != nut->frame_code[i].res ) tmp_fields=5;
358 if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8;
359
360 tmp_pts = nut->frame_code[i].pts_delta;
361 tmp_flags = nut->frame_code[i].flags;
362 tmp_stream = nut->frame_code[i].stream_id;
363 tmp_mul = nut->frame_code[i].size_mul;
364 tmp_size = nut->frame_code[i].size_lsb;
365 // tmp_res = nut->frame_code[i].res;
366 tmp_head_idx = nut->frame_code[i].header_idx;
367
368 for (j = 0; i < 256; j++, i++) {
369 if (i == 'N') {
370 j--;
371 continue;
372 }
373 if (nut->frame_code[i].pts_delta != tmp_pts ||
374 nut->frame_code[i].flags != tmp_flags ||
375 nut->frame_code[i].stream_id != tmp_stream ||
376 nut->frame_code[i].size_mul != tmp_mul ||
377 nut->frame_code[i].size_lsb != tmp_size + j ||
378 // nut->frame_code[i].res != tmp_res ||
379 nut->frame_code[i].header_idx != tmp_head_idx)
380 break;
381 }
382 if (j != tmp_mul - tmp_size)
383 tmp_fields = 6;
384
385 ff_put_v(bc, tmp_flags);
386 ff_put_v(bc, tmp_fields);
387 if (tmp_fields > 0) put_s(bc, tmp_pts);
388 if (tmp_fields > 1) ff_put_v(bc, tmp_mul);
389 if (tmp_fields > 2) ff_put_v(bc, tmp_stream);
390 if (tmp_fields > 3) ff_put_v(bc, tmp_size);
391 if (tmp_fields > 4) ff_put_v(bc, 0 /*tmp_res*/);
392 if (tmp_fields > 5) ff_put_v(bc, j);
393 if (tmp_fields > 6) ff_put_v(bc, tmp_match);
394 if (tmp_fields > 7) ff_put_v(bc, tmp_head_idx);
395 }
396 ff_put_v(bc, nut->header_count - 1);
397 for (i = 1; i < nut->header_count; i++) {
398 ff_put_v(bc, nut->header_len[i]);
399 avio_write(bc, nut->header[i], nut->header_len[i]);
400 }
401 // flags had been effectively introduced in version 4
402 if (nut->version > 3)
403 ff_put_v(bc, nut->flags);
404 }
405
write_streamheader(AVFormatContext * avctx,AVIOContext * bc,AVStream * st,int i)406 static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc,
407 AVStream *st, int i)
408 {
409 NUTContext *nut = avctx->priv_data;
410 AVCodecParameters *par = st->codecpar;
411
412 ff_put_v(bc, i);
413 switch (par->codec_type) {
414 case AVMEDIA_TYPE_VIDEO: ff_put_v(bc, 0); break;
415 case AVMEDIA_TYPE_AUDIO: ff_put_v(bc, 1); break;
416 case AVMEDIA_TYPE_SUBTITLE: ff_put_v(bc, 2); break;
417 default: ff_put_v(bc, 3); break;
418 }
419 ff_put_v(bc, 4);
420
421 if (par->codec_tag) {
422 avio_wl32(bc, par->codec_tag);
423 } else {
424 av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
425 return AVERROR(EINVAL);
426 }
427
428 ff_put_v(bc, nut->stream[i].time_base - nut->time_base);
429 ff_put_v(bc, nut->stream[i].msb_pts_shift);
430 ff_put_v(bc, nut->stream[i].max_pts_distance);
431 ff_put_v(bc, par->video_delay);
432 avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
433
434 ff_put_v(bc, par->extradata_size);
435 avio_write(bc, par->extradata, par->extradata_size);
436
437 switch (par->codec_type) {
438 case AVMEDIA_TYPE_AUDIO:
439 ff_put_v(bc, par->sample_rate);
440 ff_put_v(bc, 1);
441 ff_put_v(bc, par->channels);
442 break;
443 case AVMEDIA_TYPE_VIDEO:
444 ff_put_v(bc, par->width);
445 ff_put_v(bc, par->height);
446
447 if (st->sample_aspect_ratio.num <= 0 ||
448 st->sample_aspect_ratio.den <= 0) {
449 ff_put_v(bc, 0);
450 ff_put_v(bc, 0);
451 } else {
452 ff_put_v(bc, st->sample_aspect_ratio.num);
453 ff_put_v(bc, st->sample_aspect_ratio.den);
454 }
455 ff_put_v(bc, 0); /* csp type -- unknown */
456 break;
457 default:
458 break;
459 }
460 return 0;
461 }
462
add_info(AVIOContext * bc,const char * type,const char * value)463 static int add_info(AVIOContext *bc, const char *type, const char *value)
464 {
465 put_str(bc, type);
466 put_s(bc, -1);
467 put_str(bc, value);
468 return 1;
469 }
470
write_globalinfo(NUTContext * nut,AVIOContext * bc)471 static int write_globalinfo(NUTContext *nut, AVIOContext *bc)
472 {
473 AVFormatContext *s = nut->avf;
474 AVDictionaryEntry *t = NULL;
475 AVIOContext *dyn_bc;
476 uint8_t *dyn_buf = NULL;
477 int count = 0, dyn_size;
478 int ret = avio_open_dyn_buf(&dyn_bc);
479 if (ret < 0)
480 return ret;
481
482 ff_standardize_creation_time(s);
483 while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
484 count += add_info(dyn_bc, t->key, t->value);
485
486 ff_put_v(bc, 0); //stream_if_plus1
487 ff_put_v(bc, 0); //chapter_id
488 ff_put_v(bc, 0); //timestamp_start
489 ff_put_v(bc, 0); //length
490
491 ff_put_v(bc, count);
492
493 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
494 avio_write(bc, dyn_buf, dyn_size);
495 av_free(dyn_buf);
496 return 0;
497 }
498
write_streaminfo(NUTContext * nut,AVIOContext * bc,int stream_id)499 static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
500 AVFormatContext *s= nut->avf;
501 AVStream* st = s->streams[stream_id];
502 AVDictionaryEntry *t = NULL;
503 AVIOContext *dyn_bc;
504 uint8_t *dyn_buf=NULL;
505 int count=0, dyn_size, i;
506 int ret = avio_open_dyn_buf(&dyn_bc);
507 if (ret < 0)
508 return ret;
509
510 while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
511 count += add_info(dyn_bc, t->key, t->value);
512 for (i=0; ff_nut_dispositions[i].flag; ++i) {
513 if (st->disposition & ff_nut_dispositions[i].flag)
514 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
515 }
516 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
517 uint8_t buf[256];
518 if (st->r_frame_rate.num>0 && st->r_frame_rate.den>0)
519 snprintf(buf, sizeof(buf), "%d/%d", st->r_frame_rate.num, st->r_frame_rate.den);
520 else
521 snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den);
522 count += add_info(dyn_bc, "r_frame_rate", buf);
523 }
524 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
525
526 if (count) {
527 ff_put_v(bc, stream_id + 1); //stream_id_plus1
528 ff_put_v(bc, 0); //chapter_id
529 ff_put_v(bc, 0); //timestamp_start
530 ff_put_v(bc, 0); //length
531
532 ff_put_v(bc, count);
533
534 avio_write(bc, dyn_buf, dyn_size);
535 }
536
537 av_free(dyn_buf);
538 return count;
539 }
540
write_chapter(NUTContext * nut,AVIOContext * bc,int id)541 static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
542 {
543 AVIOContext *dyn_bc;
544 uint8_t *dyn_buf = NULL;
545 AVDictionaryEntry *t = NULL;
546 AVChapter *ch = nut->avf->chapters[id];
547 int ret, dyn_size, count = 0;
548
549 ret = avio_open_dyn_buf(&dyn_bc);
550 if (ret < 0)
551 return ret;
552
553 ff_put_v(bc, 0); // stream_id_plus1
554 put_s(bc, id + 1); // chapter_id
555 put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
556 ff_put_v(bc, ch->end - ch->start); // chapter_len
557
558 while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
559 count += add_info(dyn_bc, t->key, t->value);
560
561 ff_put_v(bc, count);
562
563 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
564 avio_write(bc, dyn_buf, dyn_size);
565 av_freep(&dyn_buf);
566 return 0;
567 }
568
write_index(NUTContext * nut,AVIOContext * bc)569 static int write_index(NUTContext *nut, AVIOContext *bc) {
570 int i;
571 Syncpoint dummy= { .pos= 0 };
572 Syncpoint *next_node[2] = { NULL };
573 int64_t startpos = avio_tell(bc);
574 int64_t payload_size;
575
576 put_tt(nut, nut->max_pts_tb, bc, nut->max_pts);
577
578 ff_put_v(bc, nut->sp_count);
579
580 for (i=0; i<nut->sp_count; i++) {
581 av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node);
582 ff_put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4));
583 dummy.pos = next_node[1]->pos;
584 }
585
586 for (i=0; i<nut->avf->nb_streams; i++) {
587 StreamContext *nus= &nut->stream[i];
588 int64_t last_pts= -1;
589 int j, k;
590 for (j=0; j<nut->sp_count; j++) {
591 int flag;
592 int n = 0;
593
594 if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) {
595 av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n");
596 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
597 }
598
599 flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count);
600 for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++)
601 n++;
602
603 ff_put_v(bc, 1 + 2*flag + 4*n);
604 for (k= j - n; k<=j && k<nut->sp_count; k++) {
605 if (nus->keyframe_pts[k] == AV_NOPTS_VALUE)
606 continue;
607 av_assert0(nus->keyframe_pts[k] > last_pts);
608 ff_put_v(bc, nus->keyframe_pts[k] - last_pts);
609 last_pts = nus->keyframe_pts[k];
610 }
611 }
612 }
613
614 payload_size = avio_tell(bc) - startpos + 8 + 4;
615
616 avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096));
617
618 return 0;
619 }
620
write_headers(AVFormatContext * avctx,AVIOContext * bc)621 static int write_headers(AVFormatContext *avctx, AVIOContext *bc)
622 {
623 NUTContext *nut = avctx->priv_data;
624 AVIOContext *dyn_bc;
625 int i, ret;
626
627 ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL);
628
629 ret = avio_open_dyn_buf(&dyn_bc);
630 if (ret < 0)
631 return ret;
632 write_mainheader(nut, dyn_bc);
633 put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE);
634
635 for (i = 0; i < nut->avf->nb_streams; i++) {
636 ret = avio_open_dyn_buf(&dyn_bc);
637 if (ret < 0)
638 return ret;
639 ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i);
640 if (ret < 0)
641 return ret;
642 put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE);
643 }
644
645 ret = avio_open_dyn_buf(&dyn_bc);
646 if (ret < 0)
647 return ret;
648 write_globalinfo(nut, dyn_bc);
649 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
650
651 for (i = 0; i < nut->avf->nb_streams; i++) {
652 ret = avio_open_dyn_buf(&dyn_bc);
653 if (ret < 0)
654 return ret;
655 ret = write_streaminfo(nut, dyn_bc, i);
656 if (ret < 0)
657 return ret;
658 if (ret > 0)
659 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
660 else
661 ffio_free_dyn_buf(&dyn_bc);
662 }
663
664 for (i = 0; i < nut->avf->nb_chapters; i++) {
665 ret = avio_open_dyn_buf(&dyn_bc);
666 if (ret < 0)
667 return ret;
668 ret = write_chapter(nut, dyn_bc, i);
669 if (ret < 0) {
670 ffio_free_dyn_buf(&dyn_bc);
671 return ret;
672 }
673 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
674 }
675
676 nut->last_syncpoint_pos = INT_MIN;
677 nut->header_count++;
678 return 0;
679 }
680
nut_write_header(AVFormatContext * s)681 static int nut_write_header(AVFormatContext *s)
682 {
683 NUTContext *nut = s->priv_data;
684 AVIOContext *bc = s->pb;
685 int i, j, ret;
686
687 nut->avf = s;
688
689 nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags);
690 if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
691 av_log(s, AV_LOG_ERROR,
692 "The additional syncpoint modes require version %d, "
693 "that is currently not finalized, "
694 "please set -f_strict experimental in order to enable it.\n",
695 nut->version);
696 return AVERROR_EXPERIMENTAL;
697 }
698
699 nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream ));
700 nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter));
701 nut->time_base= av_calloc(s->nb_streams +
702 s->nb_chapters, sizeof(*nut->time_base));
703 if (!nut->stream || !nut->chapter || !nut->time_base) {
704 av_freep(&nut->stream);
705 av_freep(&nut->chapter);
706 av_freep(&nut->time_base);
707 return AVERROR(ENOMEM);
708 }
709
710 for (i = 0; i < s->nb_streams; i++) {
711 AVStream *st = s->streams[i];
712 int ssize;
713 AVRational time_base;
714 ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num);
715
716 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate) {
717 time_base = (AVRational) {1, st->codecpar->sample_rate};
718 } else {
719 time_base = ff_choose_timebase(s, st, 48000);
720 }
721
722 avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
723
724 for (j = 0; j < nut->time_base_count; j++)
725 if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) {
726 break;
727 }
728 nut->time_base[j] = time_base;
729 nut->stream[i].time_base = &nut->time_base[j];
730 if (j == nut->time_base_count)
731 nut->time_base_count++;
732
733 if (INT64_C(1000) * time_base.num >= time_base.den)
734 nut->stream[i].msb_pts_shift = 7;
735 else
736 nut->stream[i].msb_pts_shift = 14;
737 nut->stream[i].max_pts_distance =
738 FFMAX(time_base.den, time_base.num) / time_base.num;
739 }
740
741 for (i = 0; i < s->nb_chapters; i++) {
742 AVChapter *ch = s->chapters[i];
743
744 for (j = 0; j < nut->time_base_count; j++)
745 if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
746 break;
747
748 nut->time_base[j] = ch->time_base;
749 nut->chapter[i].time_base = &nut->time_base[j];
750 if (j == nut->time_base_count)
751 nut->time_base_count++;
752 }
753
754 nut->max_distance = MAX_DISTANCE;
755 build_elision_headers(s);
756 build_frame_code(s);
757 av_assert0(nut->frame_code['N'].flags == FLAG_INVALID);
758
759 avio_write(bc, ID_STRING, strlen(ID_STRING));
760 avio_w8(bc, 0);
761
762 if ((ret = write_headers(s, bc)) < 0)
763 return ret;
764
765 if (s->avoid_negative_ts < 0)
766 s->avoid_negative_ts = 1;
767
768 avio_flush(bc);
769
770 return 0;
771 }
772
get_needed_flags(NUTContext * nut,StreamContext * nus,FrameCode * fc,AVPacket * pkt)773 static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
774 AVPacket *pkt)
775 {
776 int flags = 0;
777
778 if (pkt->flags & AV_PKT_FLAG_KEY)
779 flags |= FLAG_KEY;
780 if (pkt->stream_index != fc->stream_id)
781 flags |= FLAG_STREAM_ID;
782 if (pkt->size / fc->size_mul)
783 flags |= FLAG_SIZE_MSB;
784 if (pkt->pts - nus->last_pts != fc->pts_delta)
785 flags |= FLAG_CODED_PTS;
786 if (pkt->side_data_elems && nut->version > 3)
787 flags |= FLAG_SM_DATA;
788 if (pkt->size > 2 * nut->max_distance)
789 flags |= FLAG_CHECKSUM;
790 if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance)
791 flags |= FLAG_CHECKSUM;
792 if (pkt->size < nut->header_len[fc->header_idx] ||
793 (pkt->size > 4096 && fc->header_idx) ||
794 memcmp(pkt->data, nut->header[fc->header_idx],
795 nut->header_len[fc->header_idx]))
796 flags |= FLAG_HEADER_IDX;
797
798 return flags | (fc->flags & FLAG_CODED);
799 }
800
find_best_header_idx(NUTContext * nut,AVPacket * pkt)801 static int find_best_header_idx(NUTContext *nut, AVPacket *pkt)
802 {
803 int i;
804 int best_i = 0;
805 int best_len = 0;
806
807 if (pkt->size > 4096)
808 return 0;
809
810 for (i = 1; i < nut->header_count; i++)
811 if (pkt->size >= nut->header_len[i]
812 && nut->header_len[i] > best_len
813 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) {
814 best_i = i;
815 best_len = nut->header_len[i];
816 }
817 return best_i;
818 }
819
write_sm_data(AVFormatContext * s,AVIOContext * bc,AVPacket * pkt,int is_meta)820 static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta)
821 {
822 int ret, i, dyn_size;
823 unsigned flags;
824 AVIOContext *dyn_bc;
825 int sm_data_count = 0;
826 uint8_t tmp[256];
827 uint8_t *dyn_buf;
828
829 ret = avio_open_dyn_buf(&dyn_bc);
830 if (ret < 0)
831 return ret;
832
833 for (i = 0; i<pkt->side_data_elems; i++) {
834 const uint8_t *data = pkt->side_data[i].data;
835 int size = pkt->side_data[i].size;
836 const uint8_t *data_end = data + size;
837
838 if (is_meta) {
839 if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE
840 || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) {
841 if (!size || data[size-1]) {
842 ret = AVERROR(EINVAL);
843 goto fail;
844 }
845 while (data < data_end) {
846 const uint8_t *key = data;
847 const uint8_t *val = data + strlen(key) + 1;
848
849 if(val >= data_end) {
850 ret = AVERROR(EINVAL);
851 goto fail;
852 }
853 put_str(dyn_bc, key);
854 put_s(dyn_bc, -1);
855 put_str(dyn_bc, val);
856 data = val + strlen(val) + 1;
857 sm_data_count++;
858 }
859 }
860 } else {
861 switch (pkt->side_data[i].type) {
862 case AV_PKT_DATA_PALETTE:
863 case AV_PKT_DATA_NEW_EXTRADATA:
864 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL:
865 default:
866 if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
867 put_str(dyn_bc, "Palette");
868 } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) {
869 put_str(dyn_bc, "Extradata");
870 } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) {
871 snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data));
872 put_str(dyn_bc, tmp);
873 } else {
874 snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d",
875 (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT,
876 pkt->side_data[i].type);
877 put_str(dyn_bc, tmp);
878 }
879 put_s(dyn_bc, -2);
880 put_str(dyn_bc, "bin");
881 ff_put_v(dyn_bc, pkt->side_data[i].size);
882 avio_write(dyn_bc, data, pkt->side_data[i].size);
883 sm_data_count++;
884 break;
885 case AV_PKT_DATA_PARAM_CHANGE:
886 flags = bytestream_get_le32(&data);
887 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
888 put_str(dyn_bc, "Channels");
889 put_s(dyn_bc, bytestream_get_le32(&data));
890 sm_data_count++;
891 }
892 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
893 put_str(dyn_bc, "ChannelLayout");
894 put_s(dyn_bc, -2);
895 put_str(dyn_bc, "u64");
896 ff_put_v(bc, 8);
897 avio_write(dyn_bc, data, 8); data+=8;
898 sm_data_count++;
899 }
900 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
901 put_str(dyn_bc, "SampleRate");
902 put_s(dyn_bc, bytestream_get_le32(&data));
903 sm_data_count++;
904 }
905 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
906 put_str(dyn_bc, "Width");
907 put_s(dyn_bc, bytestream_get_le32(&data));
908 put_str(dyn_bc, "Height");
909 put_s(dyn_bc, bytestream_get_le32(&data));
910 sm_data_count+=2;
911 }
912 break;
913 case AV_PKT_DATA_SKIP_SAMPLES:
914 if (AV_RL32(data)) {
915 put_str(dyn_bc, "SkipStart");
916 put_s(dyn_bc, (unsigned)AV_RL32(data));
917 sm_data_count++;
918 }
919 if (AV_RL32(data+4)) {
920 put_str(dyn_bc, "SkipEnd");
921 put_s(dyn_bc, (unsigned)AV_RL32(data+4));
922 sm_data_count++;
923 }
924 break;
925 case AV_PKT_DATA_METADATA_UPDATE:
926 case AV_PKT_DATA_STRINGS_METADATA:
927 case AV_PKT_DATA_QUALITY_STATS:
928 // belongs into meta, not side data
929 break;
930 }
931 }
932 }
933
934 fail:
935 ff_put_v(bc, sm_data_count);
936 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
937 avio_write(bc, dyn_buf, dyn_size);
938 av_freep(&dyn_buf);
939
940 return ret;
941 }
942
nut_write_packet(AVFormatContext * s,AVPacket * pkt)943 static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
944 {
945 NUTContext *nut = s->priv_data;
946 StreamContext *nus = &nut->stream[pkt->stream_index];
947 AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL;
948 FrameCode *fc;
949 int64_t coded_pts;
950 int best_length, frame_code, flags, needed_flags, i, header_idx;
951 int best_header_idx;
952 int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY);
953 int store_sp = 0;
954 int ret = 0;
955 int sm_size = 0;
956 int data_size = pkt->size;
957 uint8_t *sm_buf = NULL;
958
959 if (pkt->pts < 0) {
960 av_log(s, AV_LOG_ERROR,
961 "Negative pts not supported stream %d, pts %"PRId64"\n",
962 pkt->stream_index, pkt->pts);
963 if (pkt->pts == AV_NOPTS_VALUE)
964 av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n");
965 return AVERROR(EINVAL);
966 }
967
968 if (pkt->side_data_elems && nut->version > 3) {
969 ret = avio_open_dyn_buf(&sm_bc);
970 if (ret < 0)
971 return ret;
972 ret = write_sm_data(s, sm_bc, pkt, 0);
973 if (ret >= 0)
974 ret = write_sm_data(s, sm_bc, pkt, 1);
975 sm_size = avio_close_dyn_buf(sm_bc, &sm_buf);
976 if (ret < 0)
977 goto fail;
978 data_size += sm_size;
979 }
980
981 if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc))
982 write_headers(s, bc);
983
984 if (key_frame && !(nus->last_flags & FLAG_KEY))
985 store_sp = 1;
986
987 if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
988 store_sp = 1;
989
990 //FIXME: Ensure store_sp is 1 in the first place.
991
992 if (store_sp &&
993 (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) {
994 int64_t sp_pos = INT64_MAX;
995
996 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
997 for (i = 0; i < s->nb_streams; i++) {
998 AVStream *st = s->streams[i];
999 int64_t dts_tb = av_rescale_rnd(pkt->dts,
1000 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
1001 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
1002 AV_ROUND_DOWN);
1003 int index = av_index_search_timestamp(st, dts_tb,
1004 AVSEEK_FLAG_BACKWARD);
1005 if (index >= 0) {
1006 sp_pos = FFMIN(sp_pos, st->index_entries[index].pos);
1007 if (!nut->write_index && 2*index > st->nb_index_entries) {
1008 memmove(st->index_entries,
1009 st->index_entries + index,
1010 sizeof(*st->index_entries) * (st->nb_index_entries - index));
1011 st->nb_index_entries -= index;
1012 }
1013 }
1014 }
1015
1016 nut->last_syncpoint_pos = avio_tell(bc);
1017 ret = avio_open_dyn_buf(&dyn_bc);
1018 if (ret < 0)
1019 goto fail;
1020 put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
1021 ff_put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0);
1022
1023 if (nut->flags & NUT_BROADCAST) {
1024 put_tt(nut, nus->time_base, dyn_bc,
1025 av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base));
1026 }
1027 put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
1028
1029 if (nut->write_index) {
1030 if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0)
1031 goto fail;
1032
1033 if ((1ll<<60) % nut->sp_count == 0)
1034 for (i=0; i<s->nb_streams; i++) {
1035 int j;
1036 StreamContext *nus = &nut->stream[i];
1037 av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts));
1038 if (!nus->keyframe_pts) {
1039 ret = AVERROR(ENOMEM);
1040 goto fail;
1041 }
1042 for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++)
1043 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
1044 }
1045 }
1046 }
1047 av_assert0(nus->last_pts != AV_NOPTS_VALUE);
1048
1049 coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1);
1050 if (ff_lsb2full(nus, coded_pts) != pkt->pts)
1051 coded_pts = pkt->pts + (1 << nus->msb_pts_shift);
1052
1053 best_header_idx = find_best_header_idx(nut, pkt);
1054
1055 best_length = INT_MAX;
1056 frame_code = -1;
1057 for (i = 0; i < 256; i++) {
1058 int length = 0;
1059 FrameCode *fc = &nut->frame_code[i];
1060 int flags = fc->flags;
1061
1062 if (flags & FLAG_INVALID)
1063 continue;
1064 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1065
1066 if (flags & FLAG_CODED) {
1067 length++;
1068 flags = needed_flags;
1069 }
1070
1071 if ((flags & needed_flags) != needed_flags)
1072 continue;
1073
1074 if ((flags ^ needed_flags) & FLAG_KEY)
1075 continue;
1076
1077 if (flags & FLAG_STREAM_ID)
1078 length += ff_get_v_length(pkt->stream_index);
1079
1080 if (data_size % fc->size_mul != fc->size_lsb)
1081 continue;
1082 if (flags & FLAG_SIZE_MSB)
1083 length += ff_get_v_length(data_size / fc->size_mul);
1084
1085 if (flags & FLAG_CHECKSUM)
1086 length += 4;
1087
1088 if (flags & FLAG_CODED_PTS)
1089 length += ff_get_v_length(coded_pts);
1090
1091 if ( (flags & FLAG_CODED)
1092 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) {
1093 flags |= FLAG_HEADER_IDX;
1094 }
1095
1096 if (flags & FLAG_HEADER_IDX) {
1097 length += 1 - nut->header_len[best_header_idx];
1098 } else {
1099 length -= nut->header_len[fc->header_idx];
1100 }
1101
1102 length *= 4;
1103 length += !(flags & FLAG_CODED_PTS);
1104 length += !(flags & FLAG_CHECKSUM);
1105
1106 if (length < best_length) {
1107 best_length = length;
1108 frame_code = i;
1109 }
1110 }
1111 av_assert0(frame_code != -1);
1112
1113 fc = &nut->frame_code[frame_code];
1114 flags = fc->flags;
1115 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1116 header_idx = fc->header_idx;
1117
1118 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
1119 avio_w8(bc, frame_code);
1120 if (flags & FLAG_CODED) {
1121 ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
1122 flags = needed_flags;
1123 }
1124 if (flags & FLAG_STREAM_ID) ff_put_v(bc, pkt->stream_index);
1125 if (flags & FLAG_CODED_PTS) ff_put_v(bc, coded_pts);
1126 if (flags & FLAG_SIZE_MSB ) ff_put_v(bc, data_size / fc->size_mul);
1127 if (flags & FLAG_HEADER_IDX) ff_put_v(bc, header_idx = best_header_idx);
1128
1129 if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc));
1130 else ffio_get_checksum(bc);
1131
1132 if (flags & FLAG_SM_DATA) {
1133 avio_write(bc, sm_buf, sm_size);
1134 }
1135 avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
1136
1137 nus->last_flags = flags;
1138 nus->last_pts = pkt->pts;
1139
1140 //FIXME just store one per syncpoint
1141 if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) {
1142 av_add_index_entry(
1143 s->streams[pkt->stream_index],
1144 nut->last_syncpoint_pos,
1145 pkt->pts,
1146 0,
1147 0,
1148 AVINDEX_KEYFRAME);
1149 if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE)
1150 nus->keyframe_pts[nut->sp_count] = pkt->pts;
1151 }
1152
1153 if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) {
1154 nut->max_pts = pkt->pts;
1155 nut->max_pts_tb = nus->time_base;
1156 }
1157
1158 fail:
1159 av_freep(&sm_buf);
1160
1161 return ret;
1162 }
1163
nut_write_trailer(AVFormatContext * s)1164 static int nut_write_trailer(AVFormatContext *s)
1165 {
1166 NUTContext *nut = s->priv_data;
1167 AVIOContext *bc = s->pb, *dyn_bc;
1168 int ret;
1169
1170 while (nut->header_count < 3)
1171 write_headers(s, bc);
1172
1173 ret = avio_open_dyn_buf(&dyn_bc);
1174 if (ret >= 0 && nut->sp_count) {
1175 av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written
1176 write_index(nut, dyn_bc);
1177 put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE);
1178 }
1179
1180 return 0;
1181 }
1182
nut_write_deinit(AVFormatContext * s)1183 static void nut_write_deinit(AVFormatContext *s)
1184 {
1185 NUTContext *nut = s->priv_data;
1186 int i;
1187
1188 ff_nut_free_sp(nut);
1189 if (nut->stream)
1190 for (i=0; i<s->nb_streams; i++)
1191 av_freep(&nut->stream[i].keyframe_pts);
1192
1193 av_freep(&nut->stream);
1194 av_freep(&nut->chapter);
1195 av_freep(&nut->time_base);
1196 }
1197
1198 #define OFFSET(x) offsetof(NUTContext, x)
1199 #define E AV_OPT_FLAG_ENCODING_PARAM
1200 static const AVOption options[] = {
1201 { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1202 { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1203 { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" },
1204 { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" },
1205 { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E, },
1206 { NULL },
1207 };
1208
1209 static const AVClass class = {
1210 .class_name = "nutenc",
1211 .item_name = av_default_item_name,
1212 .option = options,
1213 .version = LIBAVUTIL_VERSION_INT,
1214 };
1215
1216 AVOutputFormat ff_nut_muxer = {
1217 .name = "nut",
1218 .long_name = NULL_IF_CONFIG_SMALL("NUT"),
1219 .mime_type = "video/x-nut",
1220 .extensions = "nut",
1221 .priv_data_size = sizeof(NUTContext),
1222 .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
1223 CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
1224 .video_codec = AV_CODEC_ID_MPEG4,
1225 .write_header = nut_write_header,
1226 .write_packet = nut_write_packet,
1227 .write_trailer = nut_write_trailer,
1228 .deinit = nut_write_deinit,
1229 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
1230 .codec_tag = ff_nut_codec_tags,
1231 .priv_class = &class,
1232 };
1233