2 * Copyright (c) 2015 Martin Storsjo
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/md5.h"
34 #include "compat/getopt.c"
39 static const uint8_t h264_extradata[] = {
40 0x01, 0x4d, 0x40, 0x1e, 0xff, 0xe1, 0x00, 0x02, 0x67, 0x4d, 0x01, 0x00, 0x02, 0x68, 0xef
42 static const uint8_t aac_extradata[] = {
47 const char *format = "mp4";
57 uint8_t hash[HASH_SIZE];
59 AVStream *video_st, *audio_st;
60 int64_t audio_dts, video_dts;
64 int64_t audio_duration;
68 enum AVPictureType last_picture;
78 static void count_warnings(void *avcl, int level, const char *fmt, va_list vl)
80 if (level == AV_LOG_WARNING)
84 static void init_count_warnings(void)
86 av_log_set_callback(count_warnings);
90 static void reset_count_warnings(void)
92 av_log_set_callback(av_log_default_callback);
95 static int io_write(void *opaque, uint8_t *buf, int size)
98 av_md5_update(md5, buf, size);
100 fwrite(buf, 1, size, out);
104 static void init_out(const char *name)
108 snprintf(buf, sizeof(buf), "%s.%s", cur_name, format);
112 out = fopen(buf, "wb");
119 static void close_out(void)
122 av_md5_final(md5, hash);
123 for (i = 0; i < HASH_SIZE; i++)
124 printf("%02x", hash[i]);
125 printf(" %d %s\n", out_size, cur_name);
131 static void check_func(int value, int line, const char *msg, ...)
136 printf("%d: ", line);
143 #define check(value, ...) check_func(value, __LINE__, __VA_ARGS__)
145 static void init_fps(int bf, int audio_preroll, int fps)
148 ctx = avformat_alloc_context();
151 ctx->oformat = av_guess_format(format, NULL, NULL);
154 ctx->pb = avio_alloc_context(iobuf, sizeof(iobuf), AVIO_FLAG_WRITE, NULL, NULL, io_write, NULL);
157 ctx->flags |= AVFMT_FLAG_BITEXACT;
159 st = avformat_new_stream(ctx, NULL);
162 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
163 st->codecpar->codec_id = AV_CODEC_ID_H264;
164 st->codecpar->width = 640;
165 st->codecpar->height = 480;
166 st->time_base.num = 1;
167 st->time_base.den = 30;
168 st->codecpar->extradata_size = sizeof(h264_extradata);
169 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
170 if (!st->codecpar->extradata)
172 memcpy(st->codecpar->extradata, h264_extradata, sizeof(h264_extradata));
175 st = avformat_new_stream(ctx, NULL);
178 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
179 st->codecpar->codec_id = AV_CODEC_ID_AAC;
180 st->codecpar->sample_rate = 44100;
181 st->codecpar->channels = 2;
182 st->time_base.num = 1;
183 st->time_base.den = 44100;
184 st->codecpar->extradata_size = sizeof(aac_extradata);
185 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
186 if (!st->codecpar->extradata)
188 memcpy(st->codecpar->extradata, aac_extradata, sizeof(aac_extradata));
191 if (avformat_write_header(ctx, &opts) < 0)
197 duration = video_st->time_base.den / fps;
198 audio_duration = 1024LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
200 audio_preroll = 2048LL * audio_st->time_base.den / audio_st->codecpar->sample_rate;
203 video_dts = bframes ? -duration : 0;
204 audio_dts = -audio_preroll;
207 static void init(int bf, int audio_preroll)
209 init_fps(bf, audio_preroll, 30);
212 static void mux_frames(int n)
214 int end_frames = frames + n;
218 av_init_packet(&pkt);
220 if (av_compare_ts(audio_dts, audio_st->time_base, video_dts, video_st->time_base) < 0) {
221 pkt.dts = pkt.pts = audio_dts;
222 pkt.stream_index = 1;
223 pkt.duration = audio_duration;
224 audio_dts += audio_duration;
226 if (frames == end_frames)
229 pkt.stream_index = 0;
230 pkt.duration = duration;
231 if ((frames % gop_size) == 0) {
232 pkt.flags |= AV_PKT_FLAG_KEY;
233 last_picture = AV_PICTURE_TYPE_I;
234 pkt.pts = pkt.dts + duration;
237 if (last_picture == AV_PICTURE_TYPE_P) {
238 last_picture = AV_PICTURE_TYPE_B;
240 video_dts = next_p_pts;
242 last_picture = AV_PICTURE_TYPE_P;
243 if (((frames + 1) % gop_size) == 0) {
244 pkt.pts = pkt.dts + duration;
247 next_p_pts = pkt.pts = pkt.dts + 2 * duration;
248 video_dts += duration;
259 AV_WB32(pktdata, pkt.pts);
264 if (skip_write_audio && pkt.stream_index == 1)
266 av_write_frame(ctx, &pkt);
270 static void mux_gops(int n)
272 mux_frames(gop_size * n);
275 static void skip_gops(int n)
282 static void signal_init_ts(void)
285 av_init_packet(&pkt);
289 pkt.stream_index = 0;
292 av_write_frame(ctx, &pkt);
294 pkt.stream_index = 1;
295 pkt.dts = pkt.pts = audio_dts;
296 av_write_frame(ctx, &pkt);
299 static void finish(void)
301 av_write_trailer(ctx);
303 avformat_free_context(ctx);
307 static void help(void)
309 printf("movenc-test [-w]\n"
310 "-w write output into files\n");
313 int main(int argc, char **argv)
316 uint8_t header[HASH_SIZE];
317 uint8_t content[HASH_SIZE];
322 c = getopt(argc, argv, "wh");
338 md5 = av_md5_alloc();
342 // Write a fragmented file with an initial moov that actually contains some
343 // samples. One moov+mdat with 1 second of data and one moof+mdat with 1
345 init_out("non-empty-moov");
346 av_dict_set(&opts, "movflags", "frag_keyframe", 0);
352 // Write a similar file, but with b-frames and audio preroll, handled
354 init_out("non-empty-moov-elst");
355 av_dict_set(&opts, "movflags", "frag_keyframe", 0);
356 av_dict_set(&opts, "use_editlist", "1", 0);
362 // Use b-frames but no audio-preroll, but without an edit list.
363 // Due to avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO, the dts
364 // of the first audio packet is > 0, but it is set to zero since edit
365 // lists aren't used, increasing the duration of the first packet instead.
366 init_out("non-empty-moov-no-elst");
367 av_dict_set(&opts, "movflags", "frag_keyframe", 0);
368 av_dict_set(&opts, "use_editlist", "0", 0);
375 // Write an ISMV, with b-frames and audio preroll.
377 av_dict_set(&opts, "movflags", "frag_keyframe", 0);
384 // An initial moov that doesn't contain any samples, followed by two
386 init_out("empty-moov");
387 av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
392 memcpy(content, hash, HASH_SIZE);
394 // Similar to the previous one, but with input that doesn't start at
395 // pts/dts 0. avoid_negative_ts behaves in the same way as
396 // in non-empty-moov-no-elst above.
397 init_out("empty-moov-no-elst");
398 av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
404 // Same as the previous one, but disable avoid_negative_ts (which
405 // would require using an edit list, but with empty_moov, one can't
406 // write a sensible edit list, when the start timestamps aren't known).
407 // This should trigger a warning - we check that the warning is produced.
408 init_count_warnings();
409 init_out("empty-moov-no-elst-no-adjust");
410 av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
411 av_dict_set(&opts, "avoid_negative_ts", "0", 0);
417 reset_count_warnings();
418 check(num_warnings > 0, "No warnings printed for unhandled start offset");
420 // Verify that delay_moov produces the same as empty_moov for
422 init_out("delay-moov");
423 av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
428 check(!memcmp(hash, content, HASH_SIZE), "delay_moov differs from empty_moov");
430 // Test writing content that requires an edit list using delay_moov
431 init_out("delay-moov-elst");
432 av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
438 // Test writing a file with one track lacking packets, with delay_moov.
439 skip_write_audio = 1;
440 init_out("delay-moov-empty-track");
441 av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov", 0);
444 // The automatic flushing shouldn't output anything, since we're still
445 // waiting for data for some tracks
446 check(out_size == 0, "delay_moov flushed prematurely");
447 // When closed (or manually flushed), all the written data should still
451 check(out_size > 0, "delay_moov didn't output anything");
453 // Check that manually flushing still outputs things as expected. This
454 // produces two fragments, while the one above produces only one.
455 init_out("delay-moov-empty-track-flush");
456 av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
459 av_write_frame(ctx, NULL); // Force writing the moov
460 check(out_size > 0, "No moov written");
461 av_write_frame(ctx, NULL);
463 av_write_frame(ctx, NULL);
467 skip_write_audio = 0;
471 // Verify that the header written by delay_moov when manually flushed
472 // is identical to the one by empty_moov.
473 init_out("empty-moov-header");
474 av_dict_set(&opts, "movflags", "frag_keyframe+empty_moov", 0);
477 memcpy(header, hash, HASH_SIZE);
478 init_out("empty-moov-content");
480 // Written 2 seconds of content, with an automatic flush after 1 second.
481 check(out_size > 0, "No automatic flush?");
482 empty_moov_pos = prev_pos = out_size;
483 // Manually flush the second fragment
484 av_write_frame(ctx, NULL);
485 check(out_size > prev_pos, "No second fragment flushed?");
487 // Check that an extra flush doesn't output any more data
488 av_write_frame(ctx, NULL);
489 check(out_size == prev_pos, "More data written?");
491 memcpy(content, hash, HASH_SIZE);
492 // Ignore the trailer written here
495 init_out("delay-moov-header");
496 av_dict_set(&opts, "movflags", "frag_custom+delay_moov", 0);
498 check(out_size == 0, "Output written during init with delay_moov");
499 mux_gops(1); // Write 1 second of content
500 av_write_frame(ctx, NULL); // Force writing the moov
502 check(!memcmp(hash, header, HASH_SIZE), "delay_moov header differs from empty_moov");
503 init_out("delay-moov-content");
504 av_write_frame(ctx, NULL); // Flush the first fragment
505 check(out_size == empty_moov_pos, "Manually flushed content differs from automatically flushed, %d vs %d", out_size, empty_moov_pos);
506 mux_gops(1); // Write the rest of the content
507 av_write_frame(ctx, NULL); // Flush the second fragment
509 check(!memcmp(hash, content, HASH_SIZE), "delay_moov content differs from empty_moov");
513 // Verify that we can produce an identical second fragment without
514 // writing the first one. First write the reference fragments that
515 // we want to reproduce.
516 av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash", 0);
519 av_write_frame(ctx, NULL); // Output the first fragment
520 init_out("empty-moov-second-frag");
522 av_write_frame(ctx, NULL); // Output the second fragment
524 memcpy(content, hash, HASH_SIZE);
527 // Produce the same second fragment without actually writing the first
529 av_dict_set(&opts, "movflags", "frag_custom+empty_moov+dash+frag_discont", 0);
530 av_dict_set(&opts, "fragment_index", "2", 0);
531 av_dict_set(&opts, "avoid_negative_ts", "0", 0);
532 av_dict_set(&opts, "use_editlist", "0", 0);
535 init_out("empty-moov-second-frag-discont");
537 av_write_frame(ctx, NULL); // Output the second fragment
539 check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
542 // Produce the same thing by using delay_moov, which requires a slightly
543 // different call sequence.
544 av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
545 av_dict_set(&opts, "fragment_index", "2", 0);
549 av_write_frame(ctx, NULL); // Output the moov
550 init_out("delay-moov-second-frag-discont");
551 av_write_frame(ctx, NULL); // Output the second fragment
553 check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
557 // Test discontinously written fragments with b-frames (where the
558 // assumption of starting at pts=0 works) but not with audio preroll
559 // (which can't be guessed).
560 av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
563 init_out("delay-moov-elst-init");
564 av_write_frame(ctx, NULL); // Output the moov
566 memcpy(header, hash, HASH_SIZE);
567 av_write_frame(ctx, NULL); // Output the first fragment
568 init_out("delay-moov-elst-second-frag");
570 av_write_frame(ctx, NULL); // Output the second fragment
572 memcpy(content, hash, HASH_SIZE);
575 av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
576 av_dict_set(&opts, "fragment_index", "2", 0);
579 mux_gops(1); // Write the second fragment
580 init_out("delay-moov-elst-init-discont");
581 av_write_frame(ctx, NULL); // Output the moov
583 check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
584 init_out("delay-moov-elst-second-frag-discont");
585 av_write_frame(ctx, NULL); // Output the second fragment
587 check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
591 // Test discontinously written fragments with b-frames and audio preroll,
592 // properly signaled.
593 av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
596 init_out("delay-moov-elst-signal-init");
597 av_write_frame(ctx, NULL); // Output the moov
599 memcpy(header, hash, HASH_SIZE);
600 av_write_frame(ctx, NULL); // Output the first fragment
601 init_out("delay-moov-elst-signal-second-frag");
603 av_write_frame(ctx, NULL); // Output the second fragment
605 memcpy(content, hash, HASH_SIZE);
608 av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash+frag_discont", 0);
609 av_dict_set(&opts, "fragment_index", "2", 0);
613 mux_gops(1); // Write the second fragment
614 init_out("delay-moov-elst-signal-init-discont");
615 av_write_frame(ctx, NULL); // Output the moov
617 check(!memcmp(hash, header, HASH_SIZE), "discontinuously written header differs");
618 init_out("delay-moov-elst-signal-second-frag-discont");
619 av_write_frame(ctx, NULL); // Output the second fragment
621 check(!memcmp(hash, content, HASH_SIZE), "discontinuously written fragment differs");
625 // Test VFR content, with sidx atoms (which declare the pts duration
626 // of a fragment, forcing overriding the start pts of the next one).
627 // Here, the fragment duration in pts is significantly different from
628 // the duration in dts. The video stream starts at dts=-10,pts=0, and
629 // the second fragment starts at dts=155,pts=156. The trun duration sum
630 // of the first fragment is 165, which also is written as
631 // baseMediaDecodeTime in the tfdt in the second fragment. The sidx for
632 // the first fragment says earliest_presentation_time = 0 and
633 // subsegment_duration = 156, which also matches the sidx in the second
634 // fragment. For the audio stream, the pts and dts durations also don't
635 // match - the input stream starts at pts=-2048, but that part is excluded
638 av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
640 mux_frames(gop_size/2);
642 mux_frames(gop_size/2);
647 // Test VFR content, with cleared duration fields. In these cases,
648 // the muxer must guess the duration of the last packet of each
649 // fragment. As long as the framerate doesn't vary (too much) at the
650 // fragment edge, it works just fine. Additionally, when automatically
651 // cutting fragments, the muxer already know the timestamps of the next
652 // packet for one stream (in most cases the video stream), avoiding
653 // having to use guesses for that one.
654 init_count_warnings();
656 init_out("vfr-noduration");
657 av_dict_set(&opts, "movflags", "frag_keyframe+delay_moov+dash", 0);
659 mux_frames(gop_size/2);
661 mux_frames(gop_size/2);
666 reset_count_warnings();
667 check(num_warnings > 0, "No warnings printed for filled in durations");
671 return check_faults > 0 ? 1 : 0;