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(AVCodecContext * c,int size,int key_frame,uint8_t out[64])38 static int find_expected_header(AVCodecContext *c, int size, int key_frame,
39 uint8_t out[64])
40 {
41 int sample_rate = c->sample_rate;
42
43 if (size > 4096)
44 return 0;
45
46 AV_WB24(out, 1);
47
48 if (c->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 (c->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
56 c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
57 return 3;
58 } else if (c->codec_id == AV_CODEC_ID_H264) {
59 return 3;
60 } else if (c->codec_id == AV_CODEC_ID_MP3 ||
61 c->codec_id == AV_CODEC_ID_MP2) {
62 int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
63 int layer = c->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,AVCodecContext * c,int size,int frame_type)105 static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int frame_type)
106 {
107 NUTContext *nut = s->priv_data;
108 uint8_t out[64];
109 int i;
110 int len = find_expected_header(c, size, frame_type, out);
111
112 for (i = 1; i < nut->header_count; i++) {
113 if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) {
114 return i;
115 }
116 }
117
118 return 0;
119 }
120
build_elision_headers(AVFormatContext * s)121 static void build_elision_headers(AVFormatContext *s)
122 {
123 NUTContext *nut = s->priv_data;
124 int i;
125 //FIXME this is lame
126 //FIXME write a 2pass mode to find the maximal headers
127 static const uint8_t headers[][5] = {
128 { 3, 0x00, 0x00, 0x01 },
129 { 4, 0x00, 0x00, 0x01, 0xB6},
130 { 2, 0xFF, 0xFA }, //mp3+crc
131 { 2, 0xFF, 0xFB }, //mp3
132 { 2, 0xFF, 0xFC }, //mp2+crc
133 { 2, 0xFF, 0xFD }, //mp2
134 };
135
136 nut->header_count = 7;
137 for (i = 1; i < nut->header_count; i++) {
138 nut->header_len[i] = headers[i - 1][0];
139 nut->header[i] = &headers[i - 1][1];
140 }
141 }
142
build_frame_code(AVFormatContext * s)143 static void build_frame_code(AVFormatContext *s)
144 {
145 NUTContext *nut = s->priv_data;
146 int key_frame, index, pred, stream_id;
147 int start = 1;
148 int end = 254;
149 int keyframe_0_esc = s->nb_streams > 2;
150 int pred_table[10];
151 FrameCode *ft;
152
153 ft = &nut->frame_code[start];
154 ft->flags = FLAG_CODED;
155 ft->size_mul = 1;
156 ft->pts_delta = 1;
157 start++;
158
159 if (keyframe_0_esc) {
160 /* keyframe = 0 escape */
161 FrameCode *ft = &nut->frame_code[start];
162 ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
163 ft->size_mul = 1;
164 start++;
165 }
166
167 for (stream_id = 0; stream_id < s->nb_streams; stream_id++) {
168 int start2 = start + (end - start) * stream_id / s->nb_streams;
169 int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams;
170 AVCodecContext *codec = s->streams[stream_id]->codec;
171 int is_audio = codec->codec_type == AVMEDIA_TYPE_AUDIO;
172 int intra_only = /*codec->intra_only || */ is_audio;
173 int pred_count;
174 int frame_size = 0;
175
176 if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
177 frame_size = av_get_audio_frame_duration(codec, 0);
178 if (codec->codec_id == AV_CODEC_ID_VORBIS && !frame_size)
179 frame_size = 64;
180 } else {
181 AVRational f = av_div_q(codec->time_base, *nut->stream[stream_id].time_base);
182 if (f.den == 1 && f.num>0)
183 frame_size = f.num;
184 }
185 if (!frame_size)
186 frame_size = 1;
187
188 for (key_frame = 0; key_frame < 2; key_frame++) {
189 if (!intra_only || !keyframe_0_esc || key_frame != 0) {
190 FrameCode *ft = &nut->frame_code[start2];
191 ft->flags = FLAG_KEY * key_frame;
192 ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS;
193 ft->stream_id = stream_id;
194 ft->size_mul = 1;
195 if (is_audio)
196 ft->header_idx = find_header_idx(s, codec, -1, key_frame);
197 start2++;
198 }
199 }
200
201 key_frame = intra_only;
202 #if 1
203 if (is_audio) {
204 int frame_bytes = codec->frame_size * (int64_t)codec->bit_rate /
205 (8 * codec->sample_rate);
206 int pts;
207 for (pts = 0; pts < 2; pts++) {
208 for (pred = 0; pred < 2; pred++) {
209 FrameCode *ft = &nut->frame_code[start2];
210 ft->flags = FLAG_KEY * key_frame;
211 ft->stream_id = stream_id;
212 ft->size_mul = frame_bytes + 2;
213 ft->size_lsb = frame_bytes + pred;
214 ft->pts_delta = pts * frame_size;
215 ft->header_idx = find_header_idx(s, codec, frame_bytes + pred, key_frame);
216 start2++;
217 }
218 }
219 } else {
220 FrameCode *ft = &nut->frame_code[start2];
221 ft->flags = FLAG_KEY | FLAG_SIZE_MSB;
222 ft->stream_id = stream_id;
223 ft->size_mul = 1;
224 ft->pts_delta = frame_size;
225 start2++;
226 }
227 #endif
228
229 if (codec->has_b_frames) {
230 pred_count = 5;
231 pred_table[0] = -2;
232 pred_table[1] = -1;
233 pred_table[2] = 1;
234 pred_table[3] = 3;
235 pred_table[4] = 4;
236 } else if (codec->codec_id == AV_CODEC_ID_VORBIS) {
237 pred_count = 3;
238 pred_table[0] = 2;
239 pred_table[1] = 9;
240 pred_table[2] = 16;
241 } else {
242 pred_count = 1;
243 pred_table[0] = 1;
244 }
245
246 for (pred = 0; pred < pred_count; pred++) {
247 int start3 = start2 + (end2 - start2) * pred / pred_count;
248 int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count;
249
250 pred_table[pred] *= frame_size;
251
252 for (index = start3; index < end3; index++) {
253 FrameCode *ft = &nut->frame_code[index];
254 ft->flags = FLAG_KEY * key_frame;
255 ft->flags |= FLAG_SIZE_MSB;
256 ft->stream_id = stream_id;
257 //FIXME use single byte size and pred from last
258 ft->size_mul = end3 - start3;
259 ft->size_lsb = index - start3;
260 ft->pts_delta = pred_table[pred];
261 if (is_audio)
262 ft->header_idx = find_header_idx(s, codec, -1, key_frame);
263 }
264 }
265 }
266 memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N'));
267 nut->frame_code[0].flags =
268 nut->frame_code[255].flags =
269 nut->frame_code['N'].flags = FLAG_INVALID;
270 }
271
put_tt(NUTContext * nut,AVRational * time_base,AVIOContext * bc,uint64_t val)272 static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
273 {
274 val *= nut->time_base_count;
275 val += time_base - nut->time_base;
276 ff_put_v(bc, val);
277 }
278 /**
279 * Store a string as vb.
280 */
put_str(AVIOContext * bc,const char * string)281 static void put_str(AVIOContext *bc, const char *string)
282 {
283 int len = strlen(string);
284
285 ff_put_v(bc, len);
286 avio_write(bc, string, len);
287 }
288
put_s(AVIOContext * bc,int64_t val)289 static void put_s(AVIOContext *bc, int64_t val)
290 {
291 ff_put_v(bc, 2 * FFABS(val) - (val > 0));
292 }
293
294 #ifdef TRACE
ff_put_v_trace(AVIOContext * bc,uint64_t v,const char * file,const char * func,int line)295 static inline void ff_put_v_trace(AVIOContext *bc, uint64_t v, const char *file,
296 const char *func, int line)
297 {
298 av_log(NULL, AV_LOG_DEBUG, "ff_put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
299
300 ff_put_v(bc, v);
301 }
302
put_s_trace(AVIOContext * bc,int64_t v,const char * file,const char * func,int line)303 static inline void put_s_trace(AVIOContext *bc, int64_t v, const char *file, const char *func, int line)
304 {
305 av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
306
307 put_s(bc, v);
308 }
309 #define ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
310 #define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
311 #endif
312
313 //FIXME remove calculate_checksum
put_packet(NUTContext * nut,AVIOContext * bc,AVIOContext * dyn_bc,int calculate_checksum,uint64_t startcode)314 static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc,
315 int calculate_checksum, uint64_t startcode)
316 {
317 uint8_t *dyn_buf = NULL;
318 int dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
319 int forw_ptr = dyn_size + 4 * calculate_checksum;
320
321 if (forw_ptr > 4096)
322 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
323 avio_wb64(bc, startcode);
324 ff_put_v(bc, forw_ptr);
325 if (forw_ptr > 4096)
326 avio_wl32(bc, ffio_get_checksum(bc));
327
328 if (calculate_checksum)
329 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
330 avio_write(bc, dyn_buf, dyn_size);
331 if (calculate_checksum)
332 avio_wl32(bc, ffio_get_checksum(bc));
333
334 av_free(dyn_buf);
335 }
336
write_mainheader(NUTContext * nut,AVIOContext * bc)337 static void write_mainheader(NUTContext *nut, AVIOContext *bc)
338 {
339 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
340 tmp_head_idx;
341 int64_t tmp_match;
342
343 ff_put_v(bc, nut->version);
344 if (nut->version > 3)
345 ff_put_v(bc, nut->minor_version = 1);
346 ff_put_v(bc, nut->avf->nb_streams);
347 ff_put_v(bc, nut->max_distance);
348 ff_put_v(bc, nut->time_base_count);
349
350 for (i = 0; i < nut->time_base_count; i++) {
351 ff_put_v(bc, nut->time_base[i].num);
352 ff_put_v(bc, nut->time_base[i].den);
353 }
354
355 tmp_pts = 0;
356 tmp_mul = 1;
357 tmp_stream = 0;
358 tmp_match = 1 - (LLN(1) << 62);
359 tmp_head_idx = 0;
360 for (i = 0; i < 256; ) {
361 tmp_fields = 0;
362 tmp_size = 0;
363 // tmp_res=0;
364 if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1;
365 if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2;
366 if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3;
367 if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4;
368 // if (tmp_res != nut->frame_code[i].res ) tmp_fields=5;
369 if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8;
370
371 tmp_pts = nut->frame_code[i].pts_delta;
372 tmp_flags = nut->frame_code[i].flags;
373 tmp_stream = nut->frame_code[i].stream_id;
374 tmp_mul = nut->frame_code[i].size_mul;
375 tmp_size = nut->frame_code[i].size_lsb;
376 // tmp_res = nut->frame_code[i].res;
377 tmp_head_idx = nut->frame_code[i].header_idx;
378
379 for (j = 0; i < 256; j++, i++) {
380 if (i == 'N') {
381 j--;
382 continue;
383 }
384 if (nut->frame_code[i].pts_delta != tmp_pts ||
385 nut->frame_code[i].flags != tmp_flags ||
386 nut->frame_code[i].stream_id != tmp_stream ||
387 nut->frame_code[i].size_mul != tmp_mul ||
388 nut->frame_code[i].size_lsb != tmp_size + j ||
389 // nut->frame_code[i].res != tmp_res ||
390 nut->frame_code[i].header_idx != tmp_head_idx)
391 break;
392 }
393 if (j != tmp_mul - tmp_size)
394 tmp_fields = 6;
395
396 ff_put_v(bc, tmp_flags);
397 ff_put_v(bc, tmp_fields);
398 if (tmp_fields > 0) put_s(bc, tmp_pts);
399 if (tmp_fields > 1) ff_put_v(bc, tmp_mul);
400 if (tmp_fields > 2) ff_put_v(bc, tmp_stream);
401 if (tmp_fields > 3) ff_put_v(bc, tmp_size);
402 if (tmp_fields > 4) ff_put_v(bc, 0 /*tmp_res*/);
403 if (tmp_fields > 5) ff_put_v(bc, j);
404 if (tmp_fields > 6) ff_put_v(bc, tmp_match);
405 if (tmp_fields > 7) ff_put_v(bc, tmp_head_idx);
406 }
407 ff_put_v(bc, nut->header_count - 1);
408 for (i = 1; i < nut->header_count; i++) {
409 ff_put_v(bc, nut->header_len[i]);
410 avio_write(bc, nut->header[i], nut->header_len[i]);
411 }
412 // flags had been effectively introduced in version 4
413 if (nut->version > 3)
414 ff_put_v(bc, nut->flags);
415 }
416
write_streamheader(AVFormatContext * avctx,AVIOContext * bc,AVStream * st,int i)417 static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc,
418 AVStream *st, int i)
419 {
420 NUTContext *nut = avctx->priv_data;
421 AVCodecContext *codec = st->codec;
422
423 ff_put_v(bc, i);
424 switch (codec->codec_type) {
425 case AVMEDIA_TYPE_VIDEO: ff_put_v(bc, 0); break;
426 case AVMEDIA_TYPE_AUDIO: ff_put_v(bc, 1); break;
427 case AVMEDIA_TYPE_SUBTITLE: ff_put_v(bc, 2); break;
428 default: ff_put_v(bc, 3); break;
429 }
430 ff_put_v(bc, 4);
431 if (codec->codec_tag) {
432 avio_wl32(bc, codec->codec_tag);
433 } else {
434 av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
435 return AVERROR(EINVAL);
436 }
437
438 ff_put_v(bc, nut->stream[i].time_base - nut->time_base);
439 ff_put_v(bc, nut->stream[i].msb_pts_shift);
440 ff_put_v(bc, nut->stream[i].max_pts_distance);
441 ff_put_v(bc, codec->has_b_frames);
442 avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
443
444 ff_put_v(bc, codec->extradata_size);
445 avio_write(bc, codec->extradata, codec->extradata_size);
446
447 switch (codec->codec_type) {
448 case AVMEDIA_TYPE_AUDIO:
449 ff_put_v(bc, codec->sample_rate);
450 ff_put_v(bc, 1);
451 ff_put_v(bc, codec->channels);
452 break;
453 case AVMEDIA_TYPE_VIDEO:
454 ff_put_v(bc, codec->width);
455 ff_put_v(bc, codec->height);
456
457 if (st->sample_aspect_ratio.num <= 0 ||
458 st->sample_aspect_ratio.den <= 0) {
459 ff_put_v(bc, 0);
460 ff_put_v(bc, 0);
461 } else {
462 ff_put_v(bc, st->sample_aspect_ratio.num);
463 ff_put_v(bc, st->sample_aspect_ratio.den);
464 }
465 ff_put_v(bc, 0); /* csp type -- unknown */
466 break;
467 default:
468 break;
469 }
470 return 0;
471 }
472
add_info(AVIOContext * bc,const char * type,const char * value)473 static int add_info(AVIOContext *bc, const char *type, const char *value)
474 {
475 put_str(bc, type);
476 put_s(bc, -1);
477 put_str(bc, value);
478 return 1;
479 }
480
write_globalinfo(NUTContext * nut,AVIOContext * bc)481 static int write_globalinfo(NUTContext *nut, AVIOContext *bc)
482 {
483 AVFormatContext *s = nut->avf;
484 AVDictionaryEntry *t = NULL;
485 AVIOContext *dyn_bc;
486 uint8_t *dyn_buf = NULL;
487 int count = 0, dyn_size;
488 int ret = avio_open_dyn_buf(&dyn_bc);
489 if (ret < 0)
490 return ret;
491
492 while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
493 count += add_info(dyn_bc, t->key, t->value);
494
495 ff_put_v(bc, 0); //stream_if_plus1
496 ff_put_v(bc, 0); //chapter_id
497 ff_put_v(bc, 0); //timestamp_start
498 ff_put_v(bc, 0); //length
499
500 ff_put_v(bc, count);
501
502 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
503 avio_write(bc, dyn_buf, dyn_size);
504 av_free(dyn_buf);
505 return 0;
506 }
507
write_streaminfo(NUTContext * nut,AVIOContext * bc,int stream_id)508 static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
509 AVFormatContext *s= nut->avf;
510 AVStream* st = s->streams[stream_id];
511 AVDictionaryEntry *t = NULL;
512 AVIOContext *dyn_bc;
513 uint8_t *dyn_buf=NULL;
514 int count=0, dyn_size, i;
515 int ret = avio_open_dyn_buf(&dyn_bc);
516 if (ret < 0)
517 return ret;
518
519 while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
520 count += add_info(dyn_bc, t->key, t->value);
521 for (i=0; ff_nut_dispositions[i].flag; ++i) {
522 if (st->disposition & ff_nut_dispositions[i].flag)
523 count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
524 }
525 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
526 uint8_t buf[256];
527 snprintf(buf, sizeof(buf), "%d/%d", st->codec->time_base.den, st->codec->time_base.num);
528 count += add_info(dyn_bc, "r_frame_rate", buf);
529 }
530 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
531
532 if (count) {
533 ff_put_v(bc, stream_id + 1); //stream_id_plus1
534 ff_put_v(bc, 0); //chapter_id
535 ff_put_v(bc, 0); //timestamp_start
536 ff_put_v(bc, 0); //length
537
538 ff_put_v(bc, count);
539
540 avio_write(bc, dyn_buf, dyn_size);
541 }
542
543 av_free(dyn_buf);
544 return count;
545 }
546
write_chapter(NUTContext * nut,AVIOContext * bc,int id)547 static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
548 {
549 AVIOContext *dyn_bc;
550 uint8_t *dyn_buf = NULL;
551 AVDictionaryEntry *t = NULL;
552 AVChapter *ch = nut->avf->chapters[id];
553 int ret, dyn_size, count = 0;
554
555 ret = avio_open_dyn_buf(&dyn_bc);
556 if (ret < 0)
557 return ret;
558
559 ff_put_v(bc, 0); // stream_id_plus1
560 put_s(bc, id + 1); // chapter_id
561 put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
562 ff_put_v(bc, ch->end - ch->start); // chapter_len
563
564 while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
565 count += add_info(dyn_bc, t->key, t->value);
566
567 ff_put_v(bc, count);
568
569 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
570 avio_write(bc, dyn_buf, dyn_size);
571 av_freep(&dyn_buf);
572 return 0;
573 }
574
575 typedef union {
576 Syncpoint *SP[2];
577 void **VSP;
578 } SP_void_t;
579
write_index(NUTContext * nut,AVIOContext * bc)580 static int write_index(NUTContext *nut, AVIOContext *bc) {
581 int i;
582 Syncpoint dummy= { .pos= 0 };
583 SP_void_t next_node;
584 int64_t startpos = avio_tell(bc);
585 int64_t payload_size;
586
587 next_node.SP[0] = NULL;
588 next_node.SP[1] = NULL;
589
590 put_tt(nut, nut->max_pts_tb, bc, nut->max_pts);
591
592 ff_put_v(bc, nut->sp_count);
593
594 for (i=0; i<nut->sp_count; i++) {
595 av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, (void**)next_node.VSP);
596 ff_put_v(bc, (next_node.SP[1]->pos >> 4) - (dummy.pos>>4));
597 dummy.pos = next_node.SP[1]->pos;
598 }
599
600 for (i=0; i<nut->avf->nb_streams; i++) {
601 StreamContext *nus= &nut->stream[i];
602 int64_t last_pts= -1;
603 int j, k;
604 for (j=0; j<nut->sp_count; j++) {
605 int flag;
606 int n = 0;
607
608 if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) {
609 av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n");
610 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
611 }
612
613 flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count);
614 for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++)
615 n++;
616
617 ff_put_v(bc, 1 + 2*flag + 4*n);
618 for (k= j - n; k<=j && k<nut->sp_count; k++) {
619 if (nus->keyframe_pts[k] == AV_NOPTS_VALUE)
620 continue;
621 av_assert0(nus->keyframe_pts[k] > last_pts);
622 ff_put_v(bc, nus->keyframe_pts[k] - last_pts);
623 last_pts = nus->keyframe_pts[k];
624 }
625 }
626 }
627
628 payload_size = avio_tell(bc) - startpos + 8 + 4;
629
630 avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096));
631
632 return 0;
633 }
634
write_headers(AVFormatContext * avctx,AVIOContext * bc)635 static int write_headers(AVFormatContext *avctx, AVIOContext *bc)
636 {
637 NUTContext *nut = avctx->priv_data;
638 AVIOContext *dyn_bc;
639 int i, ret;
640
641 ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL);
642
643 ret = avio_open_dyn_buf(&dyn_bc);
644 if (ret < 0)
645 return ret;
646 write_mainheader(nut, dyn_bc);
647 put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE);
648
649 for (i = 0; i < nut->avf->nb_streams; i++) {
650 ret = avio_open_dyn_buf(&dyn_bc);
651 if (ret < 0)
652 return ret;
653 ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i);
654 if (ret < 0)
655 return ret;
656 put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE);
657 }
658
659 ret = avio_open_dyn_buf(&dyn_bc);
660 if (ret < 0)
661 return ret;
662 write_globalinfo(nut, dyn_bc);
663 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
664
665 for (i = 0; i < nut->avf->nb_streams; i++) {
666 ret = avio_open_dyn_buf(&dyn_bc);
667 if (ret < 0)
668 return ret;
669 ret = write_streaminfo(nut, dyn_bc, i);
670 if (ret < 0)
671 return ret;
672 if (ret > 0)
673 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
674 else {
675 uint8_t *buf;
676 avio_close_dyn_buf(dyn_bc, &buf);
677 av_free(buf);
678 }
679 }
680
681 for (i = 0; i < nut->avf->nb_chapters; i++) {
682 ret = avio_open_dyn_buf(&dyn_bc);
683 if (ret < 0)
684 return ret;
685 ret = write_chapter(nut, dyn_bc, i);
686 if (ret < 0) {
687 uint8_t *buf;
688 avio_close_dyn_buf(dyn_bc, &buf);
689 av_freep(&buf);
690 return ret;
691 }
692 put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
693 }
694
695 nut->last_syncpoint_pos = INT_MIN;
696 nut->header_count++;
697 return 0;
698 }
699
nut_write_header(AVFormatContext * s)700 static int nut_write_header(AVFormatContext *s)
701 {
702 NUTContext *nut = s->priv_data;
703 AVIOContext *bc = s->pb;
704 int i, j, ret;
705
706 nut->avf = s;
707
708 nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags);
709 if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
710 av_log(s, AV_LOG_ERROR,
711 "The additional syncpoint modes require version %d, "
712 "that is currently not finalized, "
713 "please set -f_strict experimental in order to enable it.\n",
714 nut->version);
715 return AVERROR_EXPERIMENTAL;
716 }
717
718 nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream ));
719 nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter));
720 nut->time_base= av_calloc(s->nb_streams +
721 s->nb_chapters, sizeof(*nut->time_base));
722 if (!nut->stream || !nut->chapter || !nut->time_base) {
723 av_freep(&nut->stream);
724 av_freep(&nut->chapter);
725 av_freep(&nut->time_base);
726 return AVERROR(ENOMEM);
727 }
728
729 for (i = 0; i < s->nb_streams; i++) {
730 AVStream *st = s->streams[i];
731 int ssize;
732 AVRational time_base;
733 ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num);
734
735 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->sample_rate) {
736 time_base = (AVRational) {1, st->codec->sample_rate};
737 } else {
738 time_base = ff_choose_timebase(s, st, 48000);
739 }
740
741 avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
742
743 for (j = 0; j < nut->time_base_count; j++)
744 if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) {
745 break;
746 }
747 nut->time_base[j] = time_base;
748 nut->stream[i].time_base = &nut->time_base[j];
749 if (j == nut->time_base_count)
750 nut->time_base_count++;
751
752 if (INT64_C(1000) * time_base.num >= time_base.den)
753 nut->stream[i].msb_pts_shift = 7;
754 else
755 nut->stream[i].msb_pts_shift = 14;
756 nut->stream[i].max_pts_distance =
757 FFMAX(time_base.den, time_base.num) / time_base.num;
758 }
759
760 for (i = 0; i < s->nb_chapters; i++) {
761 AVChapter *ch = s->chapters[i];
762
763 for (j = 0; j < nut->time_base_count; j++)
764 if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
765 break;
766
767 nut->time_base[j] = ch->time_base;
768 nut->chapter[i].time_base = &nut->time_base[j];
769 if (j == nut->time_base_count)
770 nut->time_base_count++;
771 }
772
773 nut->max_distance = MAX_DISTANCE;
774 build_elision_headers(s);
775 build_frame_code(s);
776 av_assert0(nut->frame_code['N'].flags == FLAG_INVALID);
777
778 avio_write(bc, ID_STRING, strlen(ID_STRING));
779 avio_w8(bc, 0);
780
781 if ((ret = write_headers(s, bc)) < 0)
782 return ret;
783
784 if (s->avoid_negative_ts < 0)
785 s->avoid_negative_ts = 1;
786
787 avio_flush(bc);
788
789 return 0;
790 }
791
get_needed_flags(NUTContext * nut,StreamContext * nus,FrameCode * fc,AVPacket * pkt)792 static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
793 AVPacket *pkt)
794 {
795 int flags = 0;
796
797 if (pkt->flags & AV_PKT_FLAG_KEY)
798 flags |= FLAG_KEY;
799 if (pkt->stream_index != fc->stream_id)
800 flags |= FLAG_STREAM_ID;
801 if (pkt->size / fc->size_mul)
802 flags |= FLAG_SIZE_MSB;
803 if (pkt->pts - nus->last_pts != fc->pts_delta)
804 flags |= FLAG_CODED_PTS;
805 if (pkt->side_data_elems && nut->version > 3)
806 flags |= FLAG_SM_DATA;
807 if (pkt->size > 2 * nut->max_distance)
808 flags |= FLAG_CHECKSUM;
809 if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance)
810 flags |= FLAG_CHECKSUM;
811 if (pkt->size < nut->header_len[fc->header_idx] ||
812 (pkt->size > 4096 && fc->header_idx) ||
813 memcmp(pkt->data, nut->header[fc->header_idx],
814 nut->header_len[fc->header_idx]))
815 flags |= FLAG_HEADER_IDX;
816
817 return flags | (fc->flags & FLAG_CODED);
818 }
819
find_best_header_idx(NUTContext * nut,AVPacket * pkt)820 static int find_best_header_idx(NUTContext *nut, AVPacket *pkt)
821 {
822 int i;
823 int best_i = 0;
824 int best_len = 0;
825
826 if (pkt->size > 4096)
827 return 0;
828
829 for (i = 1; i < nut->header_count; i++)
830 if (pkt->size >= nut->header_len[i]
831 && nut->header_len[i] > best_len
832 && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) {
833 best_i = i;
834 best_len = nut->header_len[i];
835 }
836 return best_i;
837 }
838
write_sm_data(AVFormatContext * s,AVIOContext * bc,AVPacket * pkt,int is_meta)839 static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta)
840 {
841 int ret, i, dyn_size;
842 unsigned flags;
843 AVIOContext *dyn_bc;
844 int sm_data_count = 0;
845 uint8_t tmp[256];
846 uint8_t *dyn_buf;
847
848 ret = avio_open_dyn_buf(&dyn_bc);
849 if (ret < 0)
850 return ret;
851
852 for (i = 0; i<pkt->side_data_elems; i++) {
853 const uint8_t *data = pkt->side_data[i].data;
854 int size = pkt->side_data[i].size;
855 const uint8_t *data_end = data + size;
856
857 if (is_meta) {
858 if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE
859 || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) {
860 if (!size || data[size-1]) {
861 ret = AVERROR(EINVAL);
862 goto fail;
863 }
864 while (data < data_end) {
865 const uint8_t *key = data;
866 const uint8_t *val = data + strlen(key) + 1;
867
868 if(val >= data_end) {
869 ret = AVERROR(EINVAL);
870 goto fail;
871 }
872 put_str(dyn_bc, key);
873 put_s(dyn_bc, -1);
874 put_str(dyn_bc, val);
875 data = val + strlen(val) + 1;
876 sm_data_count++;
877 }
878 }
879 } else {
880 switch (pkt->side_data[i].type) {
881 case AV_PKT_DATA_PALETTE:
882 case AV_PKT_DATA_NEW_EXTRADATA:
883 case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL:
884 default:
885 if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) {
886 put_str(dyn_bc, "Palette");
887 } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) {
888 put_str(dyn_bc, "Extradata");
889 } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) {
890 snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data));
891 put_str(dyn_bc, tmp);
892 } else {
893 snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d",
894 (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT,
895 pkt->side_data[i].type);
896 put_str(dyn_bc, tmp);
897 }
898 put_s(dyn_bc, -2);
899 put_str(dyn_bc, "bin");
900 ff_put_v(dyn_bc, pkt->side_data[i].size);
901 avio_write(dyn_bc, data, pkt->side_data[i].size);
902 sm_data_count++;
903 break;
904 case AV_PKT_DATA_PARAM_CHANGE:
905 flags = bytestream_get_le32(&data);
906 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
907 put_str(dyn_bc, "Channels");
908 put_s(dyn_bc, bytestream_get_le32(&data));
909 sm_data_count++;
910 }
911 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
912 put_str(dyn_bc, "ChannelLayout");
913 put_s(dyn_bc, -2);
914 put_str(dyn_bc, "u64");
915 ff_put_v(bc, 8);
916 avio_write(dyn_bc, data, 8); data+=8;
917 sm_data_count++;
918 }
919 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
920 put_str(dyn_bc, "SampleRate");
921 put_s(dyn_bc, bytestream_get_le32(&data));
922 sm_data_count++;
923 }
924 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
925 put_str(dyn_bc, "Width");
926 put_s(dyn_bc, bytestream_get_le32(&data));
927 put_str(dyn_bc, "Height");
928 put_s(dyn_bc, bytestream_get_le32(&data));
929 sm_data_count+=2;
930 }
931 break;
932 case AV_PKT_DATA_SKIP_SAMPLES:
933 if (AV_RL32(data)) {
934 put_str(dyn_bc, "SkipStart");
935 put_s(dyn_bc, (unsigned)AV_RL32(data));
936 sm_data_count++;
937 }
938 if (AV_RL32(data+4)) {
939 put_str(dyn_bc, "SkipEnd");
940 put_s(dyn_bc, (unsigned)AV_RL32(data+4));
941 sm_data_count++;
942 }
943 break;
944 case AV_PKT_DATA_METADATA_UPDATE:
945 case AV_PKT_DATA_STRINGS_METADATA:
946 // belongs into meta, not side data
947 break;
948 }
949 }
950 }
951
952 fail:
953 ff_put_v(bc, sm_data_count);
954 dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
955 avio_write(bc, dyn_buf, dyn_size);
956 av_freep(&dyn_buf);
957
958 return ret;
959 }
960
nut_write_packet(AVFormatContext * s,AVPacket * pkt)961 static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
962 {
963 NUTContext *nut = s->priv_data;
964 StreamContext *nus = &nut->stream[pkt->stream_index];
965 AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL;
966 FrameCode *fc;
967 int64_t coded_pts;
968 int best_length, frame_code, flags, needed_flags, i, header_idx;
969 int best_header_idx;
970 int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY);
971 int store_sp = 0;
972 int ret = 0;
973 int sm_size = 0;
974 int data_size = pkt->size;
975 uint8_t *sm_buf = NULL;
976
977 if (pkt->pts < 0) {
978 av_log(s, AV_LOG_ERROR,
979 "Negative pts not supported stream %d, pts %"PRId64"\n",
980 pkt->stream_index, pkt->pts);
981 if (pkt->pts == AV_NOPTS_VALUE)
982 av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n");
983 return AVERROR(EINVAL);
984 }
985
986 if (pkt->side_data_elems && nut->version > 3) {
987 ret = avio_open_dyn_buf(&sm_bc);
988 if (ret < 0)
989 return ret;
990 ret = write_sm_data(s, sm_bc, pkt, 0);
991 if (ret >= 0)
992 ret = write_sm_data(s, sm_bc, pkt, 1);
993 sm_size = avio_close_dyn_buf(sm_bc, &sm_buf);
994 if (ret < 0)
995 goto fail;
996 data_size += sm_size;
997 }
998
999 if (LLN(1) << (20 + 3 * nut->header_count) <= avio_tell(bc))
1000 write_headers(s, bc);
1001
1002 if (key_frame && !(nus->last_flags & FLAG_KEY))
1003 store_sp = 1;
1004
1005 if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
1006 store_sp = 1;
1007
1008 //FIXME: Ensure store_sp is 1 in the first place.
1009
1010 if (store_sp &&
1011 (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) {
1012 int64_t sp_pos = INT64_MAX;
1013
1014 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
1015 for (i = 0; i < s->nb_streams; i++) {
1016 AVStream *st = s->streams[i];
1017 int64_t dts_tb = av_rescale_rnd(pkt->dts,
1018 nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
1019 nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
1020 AV_ROUND_DOWN);
1021 int index = av_index_search_timestamp(st, dts_tb,
1022 AVSEEK_FLAG_BACKWARD);
1023 if (index >= 0) {
1024 sp_pos = FFMIN(sp_pos, st->index_entries[index].pos);
1025 if (!nut->write_index && 2*index > st->nb_index_entries) {
1026 memmove(st->index_entries,
1027 st->index_entries + index,
1028 sizeof(*st->index_entries) * (st->nb_index_entries - index));
1029 st->nb_index_entries -= index;
1030 }
1031 }
1032 }
1033
1034 nut->last_syncpoint_pos = avio_tell(bc);
1035 ret = avio_open_dyn_buf(&dyn_bc);
1036 if (ret < 0)
1037 goto fail;
1038 put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
1039 ff_put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0);
1040
1041 if (nut->flags & NUT_BROADCAST) {
1042 put_tt(nut, nus->time_base, dyn_bc,
1043 av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base));
1044 }
1045 put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
1046
1047 if (nut->write_index) {
1048 if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0)
1049 goto fail;
1050
1051 if ((LLN(1)<<60) % nut->sp_count == 0)
1052 for (i=0; i<s->nb_streams; i++) {
1053 int j;
1054 StreamContext *nus = &nut->stream[i];
1055 av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts));
1056 if (!nus->keyframe_pts) {
1057 ret = AVERROR(ENOMEM);
1058 goto fail;
1059 }
1060 for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++)
1061 nus->keyframe_pts[j] = AV_NOPTS_VALUE;
1062 }
1063 }
1064 }
1065 av_assert0(nus->last_pts != AV_NOPTS_VALUE);
1066
1067 coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1);
1068 if (ff_lsb2full(nus, coded_pts) != pkt->pts)
1069 coded_pts = pkt->pts + (1 << nus->msb_pts_shift);
1070
1071 best_header_idx = find_best_header_idx(nut, pkt);
1072
1073 best_length = INT_MAX;
1074 frame_code = -1;
1075 for (i = 0; i < 256; i++) {
1076 int length = 0;
1077 FrameCode *fc = &nut->frame_code[i];
1078 int flags = fc->flags;
1079
1080 if (flags & FLAG_INVALID)
1081 continue;
1082 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1083
1084 if (flags & FLAG_CODED) {
1085 length++;
1086 flags = needed_flags;
1087 }
1088
1089 if ((flags & needed_flags) != needed_flags)
1090 continue;
1091
1092 if ((flags ^ needed_flags) & FLAG_KEY)
1093 continue;
1094
1095 if (flags & FLAG_STREAM_ID)
1096 length += ff_get_v_length(pkt->stream_index);
1097
1098 if (data_size % fc->size_mul != fc->size_lsb)
1099 continue;
1100 if (flags & FLAG_SIZE_MSB)
1101 length += ff_get_v_length(data_size / fc->size_mul);
1102
1103 if (flags & FLAG_CHECKSUM)
1104 length += 4;
1105
1106 if (flags & FLAG_CODED_PTS)
1107 length += ff_get_v_length(coded_pts);
1108
1109 if ( (flags & FLAG_CODED)
1110 && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) {
1111 flags |= FLAG_HEADER_IDX;
1112 }
1113
1114 if (flags & FLAG_HEADER_IDX) {
1115 length += 1 - nut->header_len[best_header_idx];
1116 } else {
1117 length -= nut->header_len[fc->header_idx];
1118 }
1119
1120 length *= 4;
1121 length += !(flags & FLAG_CODED_PTS);
1122 length += !(flags & FLAG_CHECKSUM);
1123
1124 if (length < best_length) {
1125 best_length = length;
1126 frame_code = i;
1127 }
1128 }
1129 av_assert0(frame_code != -1);
1130 fc = &nut->frame_code[frame_code];
1131 flags = fc->flags;
1132 needed_flags = get_needed_flags(nut, nus, fc, pkt);
1133 header_idx = fc->header_idx;
1134
1135 ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
1136 avio_w8(bc, frame_code);
1137 if (flags & FLAG_CODED) {
1138 ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
1139 flags = needed_flags;
1140 }
1141 if (flags & FLAG_STREAM_ID) ff_put_v(bc, pkt->stream_index);
1142 if (flags & FLAG_CODED_PTS) ff_put_v(bc, coded_pts);
1143 if (flags & FLAG_SIZE_MSB ) ff_put_v(bc, data_size / fc->size_mul);
1144 if (flags & FLAG_HEADER_IDX) ff_put_v(bc, header_idx = best_header_idx);
1145
1146 if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc));
1147 else ffio_get_checksum(bc);
1148
1149 if (flags & FLAG_SM_DATA) {
1150 avio_write(bc, sm_buf, sm_size);
1151 }
1152 avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
1153
1154 nus->last_flags = flags;
1155 nus->last_pts = pkt->pts;
1156
1157 //FIXME just store one per syncpoint
1158 if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) {
1159 av_add_index_entry(
1160 s->streams[pkt->stream_index],
1161 nut->last_syncpoint_pos,
1162 pkt->pts,
1163 0,
1164 0,
1165 AVINDEX_KEYFRAME);
1166 if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE)
1167 nus->keyframe_pts[nut->sp_count] = pkt->pts;
1168 }
1169
1170 if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) {
1171 nut->max_pts = pkt->pts;
1172 nut->max_pts_tb = nus->time_base;
1173 }
1174
1175 fail:
1176 av_freep(&sm_buf);
1177
1178 return ret;
1179 }
1180
nut_write_trailer(AVFormatContext * s)1181 static int nut_write_trailer(AVFormatContext *s)
1182 {
1183 NUTContext *nut = s->priv_data;
1184 AVIOContext *bc = s->pb, *dyn_bc;
1185 int i, ret;
1186
1187 while (nut->header_count < 3)
1188 write_headers(s, bc);
1189
1190 ret = avio_open_dyn_buf(&dyn_bc);
1191 if (ret >= 0 && nut->sp_count) {
1192 av_assert1(nut->write_index);
1193 write_index(nut, dyn_bc);
1194 put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE);
1195 }
1196
1197 ff_nut_free_sp(nut);
1198 for (i=0; i<s->nb_streams; i++)
1199 av_freep(&nut->stream[i].keyframe_pts);
1200
1201 av_freep(&nut->stream);
1202 av_freep(&nut->chapter);
1203 av_freep(&nut->time_base);
1204
1205 return 0;
1206 }
1207
1208 #define OFFSET(x) offsetof(NUTContext, x)
1209 #define E AV_OPT_FLAG_ENCODING_PARAM
1210 static const AVOption options[] = {
1211 { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1212 { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" },
1213 { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" },
1214 { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" },
1215 { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E, },
1216 { NULL },
1217 };
1218
1219 static const AVClass class = {
1220 .class_name = "nutenc",
1221 .item_name = av_default_item_name,
1222 .option = options,
1223 .version = LIBAVUTIL_VERSION_INT,
1224 };
1225
1226 AVOutputFormat ff_nut_muxer = {
1227 .name = "nut",
1228 .long_name = NULL_IF_CONFIG_SMALL("NUT"),
1229 .mime_type = "video/x-nut",
1230 .extensions = "nut",
1231 .priv_data_size = sizeof(NUTContext),
1232 .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
1233 CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
1234 .video_codec = AV_CODEC_ID_MPEG4,
1235 .write_header = nut_write_header,
1236 .write_packet = nut_write_packet,
1237 .write_trailer = nut_write_trailer,
1238 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
1239 .codec_tag = ff_nut_codec_tags,
1240 .priv_class = &class,
1241 };
1242