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
280 /**
281 * Get the length in bytes which is needed to store val as v.
282 */
get_v_length(uint64_t val)283 static int get_v_length(uint64_t val)
284 {
285 int i = 1;
286
287 while (val >>= 7)
288 i++;
289
290 return i;
291 }
292
293 /**
294 * Put val using a variable number of bytes.
295 */
put_v(AVIOContext * bc,uint64_t val)296 static void put_v(AVIOContext *bc, uint64_t val)
297 {
298 int i = get_v_length(val);
299
300 while (--i > 0)
301 avio_w8(bc, 128 | (uint8_t)(val >> (7*i)));
302
303 avio_w8(bc, val & 127);
304 }
305
put_tt(NUTContext * nut,AVRational * time_base,AVIOContext * bc,uint64_t val)306 static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
307 {
308 val *= nut->time_base_count;
309 val += time_base - nut->time_base;
310 put_v(bc, val);
311 }
312 /**
313 * Store a string as vb.
314 */
put_str(AVIOContext * bc,const char * string)315 static void put_str(AVIOContext *bc, const char *string)
316 {
317 size_t len = strlen(string);
318
319 put_v(bc, len);
320 avio_write(bc, string, len);
321 }
322
put_s(AVIOContext * bc,int64_t val)323 static void put_s(AVIOContext *bc, int64_t val)
324 {
325 put_v(bc, 2 * FFABS(val) - (val > 0));
326 }
327
put_packet(NUTContext * nut,AVIOContext * bc,AVIOContext * dyn_bc,uint64_t startcode)328 static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc,
329 uint64_t startcode)
330 {
331 uint8_t *dyn_buf = NULL;
332 int dyn_size = avio_get_dyn_buf(dyn_bc, &dyn_buf);
333 int forw_ptr = dyn_size + 4;
334
335 if (forw_ptr > 4096)
336 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
337 avio_wb64(bc, startcode);
338 put_v(bc, forw_ptr);
339 if (forw_ptr > 4096)
340 avio_wl32(bc, ffio_get_checksum(bc));
341
342 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
343 avio_write(bc, dyn_buf, dyn_size);
344 avio_wl32(bc, ffio_get_checksum(bc));
345
346 ffio_reset_dyn_buf(dyn_bc);
347 }
348
write_mainheader(NUTContext * nut,AVIOContext * bc)349 static void write_mainheader(NUTContext *nut, AVIOContext *bc)
350 {
351 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
352 tmp_head_idx;
353 int64_t tmp_match;
354
355 put_v(bc, nut->version);
356 if (nut->version > 3)
357 put_v(bc, nut->minor_version = 1);
358 put_v(bc, nut->avf->nb_streams);
359 put_v(bc, nut->max_distance);
360 put_v(bc, nut->time_base_count);
361
362 for (i = 0; i < nut->time_base_count; i++) {
363 put_v(bc, nut->time_base[i].num);
364 put_v(bc, nut->time_base[i].den);
365 }
366
367 tmp_pts = 0;
368 tmp_mul = 1;
369 tmp_stream = 0;
370 tmp_match = 1 - (1LL << 62);
371 tmp_head_idx = 0;
372 for (i = 0; i < 256; ) {
373 tmp_fields = 0;
374 tmp_size = 0;
375 // tmp_res=0;
376 if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1;
377 if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2;
378 if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3;
379 if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4;
380 // if (tmp_res != nut->frame_code[i].res ) tmp_fields=5;
381 if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8;
382
383 tmp_pts = nut->frame_code[i].pts_delta;
384 tmp_flags = nut->frame_code[i].flags;
385 tmp_stream = nut->frame_code[i].stream_id;
386 tmp_mul = nut->frame_code[i].size_mul;
387 tmp_size = nut->frame_code[i].size_lsb;
388 // tmp_res = nut->frame_code[i].res;
389 tmp_head_idx = nut->frame_code[i].header_idx;
390
391 for (j = 0; i < 256; j++, i++) {
392 if (i == 'N') {
393 j--;
394 continue;
395 }
396 if (nut->frame_code[i].pts_delta != tmp_pts ||
397 nut->frame_code[i].flags != tmp_flags ||
398 nut->frame_code[i].stream_id != tmp_stream ||
399 nut->frame_code[i].size_mul != tmp_mul ||
400 nut->frame_code[i].size_lsb != tmp_size + j ||
401 // nut->frame_code[i].res != tmp_res ||
402 nut->frame_code[i].header_idx != tmp_head_idx)
403 break;
404 }
405 if (j != tmp_mul - tmp_size)
406 tmp_fields = 6;
407
408 put_v(bc, tmp_flags);
409 put_v(bc, tmp_fields);
410 if (tmp_fields > 0) put_s(bc, tmp_pts);
411 if (tmp_fields > 1) put_v(bc, tmp_mul);
412 if (tmp_fields > 2) put_v(bc, tmp_stream);
413 if (tmp_fields > 3) put_v(bc, tmp_size);
414 if (tmp_fields > 4) put_v(bc, 0 /*tmp_res*/);
415 if (tmp_fields > 5) put_v(bc, j);
416 if (tmp_fields > 6) put_v(bc, tmp_match);
417 if (tmp_fields > 7) put_v(bc, tmp_head_idx);
418 }
419 put_v(bc, nut->header_count - 1);
420 for (i = 1; i < nut->header_count; i++) {
421 put_v(bc, nut->header_len[i]);
422 avio_write(bc, nut->header[i], nut->header_len[i]);
423 }
424 // flags had been effectively introduced in version 4
425 if (nut->version > 3)
426 put_v(bc, nut->flags);
427 }
428
write_streamheader(AVFormatContext * avctx,AVIOContext * bc,AVStream * st,int i)429 static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc,
430 AVStream *st, int i)
431 {
432 NUTContext *nut = avctx->priv_data;
433 AVCodecParameters *par = st->codecpar;
434
435 put_v(bc, i);
436 switch (par->codec_type) {
437 case AVMEDIA_TYPE_VIDEO: put_v(bc, 0); break;
438 case AVMEDIA_TYPE_AUDIO: put_v(bc, 1); break;
439 case AVMEDIA_TYPE_SUBTITLE: put_v(bc, 2); break;
440 default: put_v(bc, 3); break;
441 }
442 put_v(bc, 4);
443
444 if (par->codec_tag) {
445 avio_wl32(bc, par->codec_tag);
446 } else {
447 av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
448 return AVERROR(EINVAL);
449 }
450
451 put_v(bc, nut->stream[i].time_base - nut->time_base);
452 put_v(bc, nut->stream[i].msb_pts_shift);
453 put_v(bc, nut->stream[i].max_pts_distance);
454 put_v(bc, par->video_delay);
455 avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
456
457 put_v(bc, par->extradata_size);
458 avio_write(bc, par->extradata, par->extradata_size);
459
460 switch (par->codec_type) {
461 case AVMEDIA_TYPE_AUDIO:
462 put_v(bc, par->sample_rate);
463 put_v(bc, 1);
464 put_v(bc, par->channels);
465 break;
466 case AVMEDIA_TYPE_VIDEO:
467 put_v(bc, par->width);
468 put_v(bc, par->height);
469
470 if (st->sample_aspect_ratio.num <= 0 ||
471 st->sample_aspect_ratio.den <= 0) {
472 put_v(bc, 0);
473 put_v(bc, 0);
474 } else {
475 put_v(bc, st->sample_aspect_ratio.num);
476 put_v(bc, st->sample_aspect_ratio.den);
477 }
478 put_v(bc, 0); /* csp type -- unknown */
479 break;
480 default:
481 break;
482 }
483 return 0;
484 }
485
add_info(AVIOContext * bc,const char * type,const char * value)486 static int add_info(AVIOContext *bc, const char *type, const char *value)
487 {
488 put_str(bc, type);
489 put_s(bc, -1);
490 put_str(bc, value);
491 return 1;
492 }
493
write_globalinfo(NUTContext * nut,AVIOContext * bc)494 static int write_globalinfo(NUTContext *nut, AVIOContext *bc)
495 {
496 AVFormatContext *s = nut->avf;
497 AVDictionaryEntry *t = NULL;
498 AVIOContext *dyn_bc;
499 uint8_t *dyn_buf = NULL;
500 int count = 0, dyn_size;
501 int ret = avio_open_dyn_buf(&dyn_bc);
502 if (ret < 0)
503 return ret;
504
505 ff_standardize_creation_time(s);
506 while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
507 count += add_info(dyn_bc, t->key, t->value);
508
509 put_v(bc, 0); //stream_if_plus1
510 put_v(bc, 0); //chapter_id
511 put_v(bc, 0); //timestamp_start
512 put_v(bc, 0); //length
513
514 put_v(bc, count);
515
516 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
517 avio_write(bc, dyn_buf, dyn_size);
518 av_free(dyn_buf);
519 return 0;
520 }
521
write_streaminfo(NUTContext * nut,AVIOContext * bc,int stream_id)522 static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
523 AVFormatContext *s= nut->avf;
524 AVStream* st = s->streams[stream_id];
525 AVDictionaryEntry *t = NULL;
526 AVIOContext *dyn_bc;
527 uint8_t *dyn_buf=NULL;
528 int count=0, dyn_size, i;
529 int ret = avio_open_dyn_buf(&dyn_bc);
530 if (ret < 0)
531 return ret;
532
533 while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
534 count += add_info(dyn_bc, t->key, t->value);
535 for (i=0; ff_nut_dispositions[i].flag; ++i) {
536 if (st->disposition & ff_nut_dispositions[i].flag)
537 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
538 }
539 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
540 uint8_t buf[256];
541 if (st->r_frame_rate.num>0 && st->r_frame_rate.den>0)
542 snprintf(buf, sizeof(buf), "%d/%d", st->r_frame_rate.num, st->r_frame_rate.den);
543 else
544 snprintf(buf, sizeof(buf), "%d/%d", st->avg_frame_rate.num, st->avg_frame_rate.den);
545 count += add_info(dyn_bc, "r_frame_rate", buf);
546 }
547 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
548
549 if (count) {
550 put_v(bc, stream_id + 1); //stream_id_plus1
551 put_v(bc, 0); //chapter_id
552 put_v(bc, 0); //timestamp_start
553 put_v(bc, 0); //length
554
555 put_v(bc, count);
556
557 avio_write(bc, dyn_buf, dyn_size);
558 }
559
560 av_free(dyn_buf);
561 return count;
562 }
563
write_chapter(NUTContext * nut,AVIOContext * bc,int id)564 static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
565 {
566 AVIOContext *dyn_bc;
567 uint8_t *dyn_buf = NULL;
568 AVDictionaryEntry *t = NULL;
569 AVChapter *ch = nut->avf->chapters[id];
570 int ret, dyn_size, count = 0;
571
572 ret = avio_open_dyn_buf(&dyn_bc);
573 if (ret < 0)
574 return ret;
575
576 put_v(bc, 0); // stream_id_plus1
577 put_s(bc, id + 1); // chapter_id
578 put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
579 put_v(bc, ch->end - ch->start); // chapter_len
580
581 while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
582 count += add_info(dyn_bc, t->key, t->value);
583
584 put_v(bc, count);
585
586 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
587 avio_write(bc, dyn_buf, dyn_size);
588 av_freep(&dyn_buf);
589 return 0;
590 }
591
write_index(NUTContext * nut,AVIOContext * bc)592 static int write_index(NUTContext *nut, AVIOContext *bc) {
593 int i;
594 Syncpoint dummy= { .pos= 0 };
595 Syncpoint *next_node[2] = { NULL };
596 int64_t startpos = avio_tell(bc);
597 int64_t payload_size;
598
599 put_tt(nut, nut->max_pts_tb, bc, nut->max_pts);
600
601 put_v(bc, nut->sp_count);
602
603 for (i=0; i<nut->sp_count; i++) {
604 av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, (void**)next_node);
605 put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4));
606 dummy.pos = next_node[1]->pos;
607 }
608
609 for (i=0; i<nut->avf->nb_streams; i++) {
610 StreamContext *nus= &nut->stream[i];
611 int64_t last_pts= -1;
612 int j, k;
613 for (j=0; j<nut->sp_count; j++) {
614 int flag;
615 int n = 0;
616
617 if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) {
618 av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n");
619 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
620 }
621
622 flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count);
623 for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++)
624 n++;
625
626 put_v(bc, 1 + 2 * flag + 4 * n);
627 for (k= j - n; k<=j && k<nut->sp_count; k++) {
628 if (nus->keyframe_pts[k] == AV_NOPTS_VALUE)
629 continue;
630 av_assert0(nus->keyframe_pts[k] > last_pts);
631 put_v(bc, nus->keyframe_pts[k] - last_pts);
632 last_pts = nus->keyframe_pts[k];
633 }
634 }
635 }
636
637 payload_size = avio_tell(bc) - startpos + 8 + 4;
638
639 avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096));
640
641 return 0;
642 }
643
write_headers(AVFormatContext * avctx,AVIOContext * bc)644 static int write_headers(AVFormatContext *avctx, AVIOContext *bc)
645 {
646 NUTContext *nut = avctx->priv_data;
647 AVIOContext *dyn_bc;
648 int i, ret;
649
650 ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL);
651
652 ret = avio_open_dyn_buf(&dyn_bc);
653 if (ret < 0)
654 return ret;
655 write_mainheader(nut, dyn_bc);
656 put_packet(nut, bc, dyn_bc, MAIN_STARTCODE);
657
658 for (i = 0; i < nut->avf->nb_streams; i++) {
659 ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i);
660 if (ret < 0) {
661 goto fail;
662 }
663 put_packet(nut, bc, dyn_bc, STREAM_STARTCODE);
664 }
665
666 write_globalinfo(nut, dyn_bc);
667 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
668
669 for (i = 0; i < nut->avf->nb_streams; i++) {
670 ret = write_streaminfo(nut, dyn_bc, i);
671 if (ret > 0)
672 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
673 else if (ret < 0) {
674 goto fail;
675 }
676 }
677
678 for (i = 0; i < nut->avf->nb_chapters; i++) {
679 ret = write_chapter(nut, dyn_bc, i);
680 if (ret < 0) {
681 goto fail;
682 }
683 put_packet(nut, bc, dyn_bc, INFO_STARTCODE);
684 }
685
686 nut->last_syncpoint_pos = INT_MIN;
687 nut->header_count++;
688
689 ret = 0;
690 fail:
691 ffio_free_dyn_buf(&dyn_bc);
692
693 return ret;
694 }
695
nut_write_header(AVFormatContext * s)696 static int nut_write_header(AVFormatContext *s)
697 {
698 NUTContext *nut = s->priv_data;
699 AVIOContext *bc = s->pb;
700 int i, j, ret;
701
702 nut->avf = s;
703
704 nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags);
705 if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
706 av_log(s, AV_LOG_ERROR,
707 "The additional syncpoint modes require version %d, "
708 "that is currently not finalized, "
709 "please set -f_strict experimental in order to enable it.\n",
710 nut->version);
711 return AVERROR_EXPERIMENTAL;
712 }
713
714 nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream ));
715 nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter));
716 nut->time_base= av_calloc(s->nb_streams +
717 s->nb_chapters, sizeof(*nut->time_base));
718 if (!nut->stream || !nut->chapter || !nut->time_base)
719 return AVERROR(ENOMEM);
720
721 for (i = 0; i < s->nb_streams; i++) {
722 AVStream *st = s->streams[i];
723 int ssize;
724 AVRational time_base;
725 ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num);
726
727 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate) {
728 time_base = (AVRational) {1, st->codecpar->sample_rate};
729 } else {
730 time_base = ff_choose_timebase(s, st, 48000);
731 }
732
733 avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
734
735 for (j = 0; j < nut->time_base_count; j++)
736 if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) {
737 break;
738 }
739 nut->time_base[j] = time_base;
740 nut->stream[i].time_base = &nut->time_base[j];
741 if (j == nut->time_base_count)
742 nut->time_base_count++;
743
744 if (INT64_C(1000) * time_base.num >= time_base.den)
745 nut->stream[i].msb_pts_shift = 7;
746 else
747 nut->stream[i].msb_pts_shift = 14;
748 nut->stream[i].max_pts_distance =
749 FFMAX(time_base.den, time_base.num) / time_base.num;
750 }
751
752 for (i = 0; i < s->nb_chapters; i++) {
753 AVChapter *ch = s->chapters[i];
754
755 for (j = 0; j < nut->time_base_count; j++)
756 if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
757 break;
758
759 nut->time_base[j] = ch->time_base;
760 nut->chapter[i].time_base = &nut->time_base[j];
761 if (j == nut->time_base_count)
762 nut->time_base_count++;
763 }
764
765 nut->max_distance = MAX_DISTANCE;
766 build_elision_headers(s);
767 build_frame_code(s);
768 av_assert0(nut->frame_code['N'].flags == FLAG_INVALID);
769
770 avio_write(bc, ID_STRING, strlen(ID_STRING));
771 avio_w8(bc, 0);
772
773 if ((ret = write_headers(s, bc)) < 0)
774 return ret;
775
776 if (s->avoid_negative_ts < 0)
777 s->avoid_negative_ts = 1;
778
779 return 0;
780 }
781
get_needed_flags(NUTContext * nut,StreamContext * nus,FrameCode * fc,AVPacket * pkt)782 static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
783 AVPacket *pkt)
784 {
785 int flags = 0;
786
787 if (pkt->flags & AV_PKT_FLAG_KEY)
788 flags |= FLAG_KEY;
789 if (pkt->stream_index != fc->stream_id)
790 flags |= FLAG_STREAM_ID;
791 if (pkt->size / fc->size_mul)
792 flags |= FLAG_SIZE_MSB;
793 if (pkt->pts - nus->last_pts != fc->pts_delta)
794 flags |= FLAG_CODED_PTS;
795 if (pkt->side_data_elems && nut->version > 3)
796 flags |= FLAG_SM_DATA;
797 if (pkt->size > 2 * nut->max_distance)
798 flags |= FLAG_CHECKSUM;
799 if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance)
800 flags |= FLAG_CHECKSUM;
801 if (fc->header_idx)
802 if (pkt->size < nut->header_len[fc->header_idx] ||
803 pkt->size > 4096 ||
804 memcmp(pkt->data, nut->header [fc->header_idx],
805 nut->header_len[fc->header_idx]))
806 flags |= FLAG_HEADER_IDX;
807
808 return flags | (fc->flags & FLAG_CODED);
809 }
810
find_best_header_idx(NUTContext * nut,AVPacket * pkt)811 static int find_best_header_idx(NUTContext *nut, AVPacket *pkt)
812 {
813 int i;
814 int best_i = 0;
815 int best_len = 0;
816
817 if (pkt->size > 4096)
818 return 0;
819
820 for (i = 1; i < nut->header_count; i++)
821 if (pkt->size >= nut->header_len[i]
822 && nut->header_len[i] > best_len
823 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) {
824 best_i = i;
825 best_len = nut->header_len[i];
826 }
827 return best_i;
828 }
829
write_sm_data(AVFormatContext * s,AVIOContext * bc,AVPacket * pkt,int is_meta)830 static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta)
831 {
832 int ret, i, dyn_size;
833 unsigned flags;
834 AVIOContext *dyn_bc;
835 int sm_data_count = 0;
836 uint8_t tmp[256];
837 uint8_t *dyn_buf;
838
839 ret = avio_open_dyn_buf(&dyn_bc);
840 if (ret < 0)
841 return ret;
842
843 for (i = 0; i<pkt->side_data_elems; i++) {
844 const uint8_t *data = pkt->side_data[i].data;
845 int size = pkt->side_data[i].size;
846 const uint8_t *data_end = data + size;
847
848 if (is_meta) {
849 if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE
850 || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) {
851 if (!size || data[size-1]) {
852 ret = AVERROR(EINVAL);
853 goto fail;
854 }
855 while (data < data_end) {
856 const uint8_t *key = data;
857 const uint8_t *val = data + strlen(key) + 1;
858
859 if(val >= data_end) {
860 ret = AVERROR(EINVAL);
861 goto fail;
862 }
863 put_str(dyn_bc, key);
864 put_s(dyn_bc, -1);
865 put_str(dyn_bc, val);
866 data = val + strlen(val) + 1;
867 sm_data_count++;
868 }
869 }
870 } else {
871 switch (pkt->side_data[i].type) {
872 case AV_PKT_DATA_PALETTE:
873 case AV_PKT_DATA_NEW_EXTRADATA:
874 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL:
875 default:
876 if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
877 put_str(dyn_bc, "Palette");
878 } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) {
879 put_str(dyn_bc, "Extradata");
880 } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) {
881 snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data));
882 put_str(dyn_bc, tmp);
883 } else {
884 snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d",
885 (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT,
886 pkt->side_data[i].type);
887 put_str(dyn_bc, tmp);
888 }
889 put_s(dyn_bc, -2);
890 put_str(dyn_bc, "bin");
891 put_v(dyn_bc, pkt->side_data[i].size);
892 avio_write(dyn_bc, data, pkt->side_data[i].size);
893 sm_data_count++;
894 break;
895 case AV_PKT_DATA_PARAM_CHANGE:
896 flags = bytestream_get_le32(&data);
897 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
898 put_str(dyn_bc, "Channels");
899 put_s(dyn_bc, bytestream_get_le32(&data));
900 sm_data_count++;
901 }
902 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
903 put_str(dyn_bc, "ChannelLayout");
904 put_s(dyn_bc, -2);
905 put_str(dyn_bc, "u64");
906 put_v(dyn_bc, 8);
907 avio_write(dyn_bc, data, 8); data+=8;
908 sm_data_count++;
909 }
910 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
911 put_str(dyn_bc, "SampleRate");
912 put_s(dyn_bc, bytestream_get_le32(&data));
913 sm_data_count++;
914 }
915 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
916 put_str(dyn_bc, "Width");
917 put_s(dyn_bc, bytestream_get_le32(&data));
918 put_str(dyn_bc, "Height");
919 put_s(dyn_bc, bytestream_get_le32(&data));
920 sm_data_count+=2;
921 }
922 break;
923 case AV_PKT_DATA_SKIP_SAMPLES:
924 if (AV_RL32(data)) {
925 put_str(dyn_bc, "SkipStart");
926 put_s(dyn_bc, (unsigned)AV_RL32(data));
927 sm_data_count++;
928 }
929 if (AV_RL32(data+4)) {
930 put_str(dyn_bc, "SkipEnd");
931 put_s(dyn_bc, (unsigned)AV_RL32(data+4));
932 sm_data_count++;
933 }
934 break;
935 case AV_PKT_DATA_METADATA_UPDATE:
936 case AV_PKT_DATA_STRINGS_METADATA:
937 case AV_PKT_DATA_QUALITY_STATS:
938 // belongs into meta, not side data
939 break;
940 }
941 }
942 }
943
944 fail:
945 put_v(bc, sm_data_count);
946 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
947 avio_write(bc, dyn_buf, dyn_size);
948 av_freep(&dyn_buf);
949
950 return ret;
951 }
952
nut_write_packet(AVFormatContext * s,AVPacket * pkt)953 static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
954 {
955 NUTContext *nut = s->priv_data;
956 StreamContext *nus = &nut->stream[pkt->stream_index];
957 AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL;
958 FrameCode *fc;
959 int64_t coded_pts;
960 int best_length, frame_code, flags, needed_flags, i, header_idx;
961 int best_header_idx;
962 int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY);
963 int store_sp = 0;
964 int ret = 0;
965 int sm_size = 0;
966 int data_size = pkt->size;
967 uint8_t *sm_buf = NULL;
968
969 if (pkt->pts < 0) {
970 av_log(s, AV_LOG_ERROR,
971 "Negative pts not supported stream %d, pts %"PRId64"\n",
972 pkt->stream_index, pkt->pts);
973 if (pkt->pts == AV_NOPTS_VALUE)
974 av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n");
975 return AVERROR(EINVAL);
976 }
977
978 if (pkt->side_data_elems && nut->version > 3) {
979 ret = avio_open_dyn_buf(&sm_bc);
980 if (ret < 0)
981 return ret;
982 ret = write_sm_data(s, sm_bc, pkt, 0);
983 if (ret >= 0)
984 ret = write_sm_data(s, sm_bc, pkt, 1);
985 sm_size = avio_close_dyn_buf(sm_bc, &sm_buf);
986 if (ret < 0)
987 goto fail;
988 data_size += sm_size;
989 }
990
991 if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc))
992 write_headers(s, bc);
993
994 if (key_frame && !(nus->last_flags & FLAG_KEY))
995 store_sp = 1;
996
997 if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
998 store_sp = 1;
999
1000 //FIXME: Ensure store_sp is 1 in the first place.
1001
1002 if (store_sp &&
1003 (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) {
1004 int64_t sp_pos = INT64_MAX;
1005
1006 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
1007 for (i = 0; i < s->nb_streams; i++) {
1008 AVStream *st = s->streams[i];
1009 int64_t dts_tb = av_rescale_rnd(pkt->dts,
1010 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
1011 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
1012 AV_ROUND_DOWN);
1013 int index = av_index_search_timestamp(st, dts_tb,
1014 AVSEEK_FLAG_BACKWARD);
1015 if (index >= 0) {
1016 sp_pos = FFMIN(sp_pos, st->index_entries[index].pos);
1017 if (!nut->write_index && 2*index > st->nb_index_entries) {
1018 memmove(st->index_entries,
1019 st->index_entries + index,
1020 sizeof(*st->index_entries) * (st->nb_index_entries - index));
1021 st->nb_index_entries -= index;
1022 }
1023 }
1024 }
1025
1026 nut->last_syncpoint_pos = avio_tell(bc);
1027 ret = avio_open_dyn_buf(&dyn_bc);
1028 if (ret < 0)
1029 goto fail;
1030 put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
1031 put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0);
1032
1033 if (nut->flags & NUT_BROADCAST) {
1034 put_tt(nut, nus->time_base, dyn_bc,
1035 av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base));
1036 }
1037 put_packet(nut, bc, dyn_bc, SYNCPOINT_STARTCODE);
1038 ffio_free_dyn_buf(&dyn_bc);
1039
1040 if (nut->write_index) {
1041 if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0)
1042 goto fail;
1043
1044 if ((1ll<<60) % nut->sp_count == 0)
1045 for (i=0; i<s->nb_streams; i++) {
1046 int j;
1047 StreamContext *nus = &nut->stream[i];
1048 av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts));
1049 if (!nus->keyframe_pts) {
1050 ret = AVERROR(ENOMEM);
1051 goto fail;
1052 }
1053 for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++)
1054 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
1055 }
1056 }
1057 }
1058 av_assert0(nus->last_pts != AV_NOPTS_VALUE);
1059
1060 coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1);
1061 if (ff_lsb2full(nus, coded_pts) != pkt->pts)
1062 coded_pts = pkt->pts + (1 << nus->msb_pts_shift);
1063
1064 best_header_idx = find_best_header_idx(nut, pkt);
1065
1066 best_length = INT_MAX;
1067 frame_code = -1;
1068 for (i = 0; i < 256; i++) {
1069 int length = 0;
1070 FrameCode *fc = &nut->frame_code[i];
1071 int flags = fc->flags;
1072
1073 if (flags & FLAG_INVALID)
1074 continue;
1075 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1076
1077 if (flags & FLAG_CODED) {
1078 length++;
1079 flags = needed_flags;
1080 }
1081
1082 if ((flags & needed_flags) != needed_flags)
1083 continue;
1084
1085 if ((flags ^ needed_flags) & FLAG_KEY)
1086 continue;
1087
1088 if (flags & FLAG_STREAM_ID)
1089 length += get_v_length(pkt->stream_index);
1090
1091 if (data_size % fc->size_mul != fc->size_lsb)
1092 continue;
1093 if (flags & FLAG_SIZE_MSB)
1094 length += get_v_length(data_size / fc->size_mul);
1095
1096 if (flags & FLAG_CHECKSUM)
1097 length += 4;
1098
1099 if (flags & FLAG_CODED_PTS)
1100 length += get_v_length(coded_pts);
1101
1102 if ( (flags & FLAG_CODED)
1103 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) {
1104 flags |= FLAG_HEADER_IDX;
1105 }
1106
1107 if (flags & FLAG_HEADER_IDX) {
1108 length += 1 - nut->header_len[best_header_idx];
1109 } else {
1110 length -= nut->header_len[fc->header_idx];
1111 }
1112
1113 length *= 4;
1114 length += !(flags & FLAG_CODED_PTS);
1115 length += !(flags & FLAG_CHECKSUM);
1116
1117 if (length < best_length) {
1118 best_length = length;
1119 frame_code = i;
1120 }
1121 }
1122 av_assert0(frame_code != -1);
1123
1124 fc = &nut->frame_code[frame_code];
1125 flags = fc->flags;
1126 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1127 header_idx = fc->header_idx;
1128
1129 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
1130 avio_w8(bc, frame_code);
1131 if (flags & FLAG_CODED) {
1132 put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
1133 flags = needed_flags;
1134 }
1135 if (flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index);
1136 if (flags & FLAG_CODED_PTS) put_v(bc, coded_pts);
1137 if (flags & FLAG_SIZE_MSB ) put_v(bc, data_size / fc->size_mul);
1138 if (flags & FLAG_HEADER_IDX) put_v(bc, header_idx = best_header_idx);
1139
1140 if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc));
1141 else ffio_get_checksum(bc);
1142
1143 if (flags & FLAG_SM_DATA) {
1144 avio_write(bc, sm_buf, sm_size);
1145 }
1146 avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
1147
1148 nus->last_flags = flags;
1149 nus->last_pts = pkt->pts;
1150
1151 //FIXME just store one per syncpoint
1152 if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) {
1153 av_add_index_entry(
1154 s->streams[pkt->stream_index],
1155 nut->last_syncpoint_pos,
1156 pkt->pts,
1157 0,
1158 0,
1159 AVINDEX_KEYFRAME);
1160 if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE)
1161 nus->keyframe_pts[nut->sp_count] = pkt->pts;
1162 }
1163
1164 if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) {
1165 nut->max_pts = pkt->pts;
1166 nut->max_pts_tb = nus->time_base;
1167 }
1168
1169 fail:
1170 av_freep(&sm_buf);
1171
1172 return ret;
1173 }
1174
nut_write_trailer(AVFormatContext * s)1175 static int nut_write_trailer(AVFormatContext *s)
1176 {
1177 NUTContext *nut = s->priv_data;
1178 AVIOContext *bc = s->pb, *dyn_bc;
1179 int ret;
1180
1181 while (nut->header_count < 3)
1182 write_headers(s, bc);
1183
1184 if (!nut->sp_count)
1185 return 0;
1186
1187 ret = avio_open_dyn_buf(&dyn_bc);
1188 if (ret >= 0) {
1189 av_assert1(nut->write_index); // sp_count should be 0 if no index is going to be written
1190 write_index(nut, dyn_bc);
1191 put_packet(nut, bc, dyn_bc, INDEX_STARTCODE);
1192 ffio_free_dyn_buf(&dyn_bc);
1193 }
1194
1195 return 0;
1196 }
1197
nut_write_deinit(AVFormatContext * s)1198 static void nut_write_deinit(AVFormatContext *s)
1199 {
1200 NUTContext *nut = s->priv_data;
1201 int i;
1202
1203 ff_nut_free_sp(nut);
1204 if (nut->stream)
1205 for (i=0; i<s->nb_streams; i++)
1206 av_freep(&nut->stream[i].keyframe_pts);
1207
1208 av_freep(&nut->stream);
1209 av_freep(&nut->chapter);
1210 av_freep(&nut->time_base);
1211 }
1212
1213 #define OFFSET(x) offsetof(NUTContext, x)
1214 #define E AV_OPT_FLAG_ENCODING_PARAM
1215 static const AVOption options[] = {
1216 { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1217 { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1218 { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" },
1219 { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" },
1220 { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E, },
1221 { NULL },
1222 };
1223
1224 static const AVClass class = {
1225 .class_name = "nutenc",
1226 .item_name = av_default_item_name,
1227 .option = options,
1228 .version = LIBAVUTIL_VERSION_INT,
1229 };
1230
1231 AVOutputFormat ff_nut_muxer = {
1232 .name = "nut",
1233 .long_name = NULL_IF_CONFIG_SMALL("NUT"),
1234 .mime_type = "video/x-nut",
1235 .extensions = "nut",
1236 .priv_data_size = sizeof(NUTContext),
1237 .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
1238 CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
1239 .video_codec = AV_CODEC_ID_MPEG4,
1240 .write_header = nut_write_header,
1241 .write_packet = nut_write_packet,
1242 .write_trailer = nut_write_trailer,
1243 .deinit = nut_write_deinit,
1244 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
1245 .codec_tag = ff_nut_codec_tags,
1246 .priv_class = &class,
1247 };
1248