static int close_file( hnd_t handle, int64_t largest_pts, int64_t second_largest_pts )
{
mp4_hnd_t *p_mp4 = handle;
if( !p_mp4 )
return 0;
if( p_mp4->p_root )
{
double actual_duration = 0;
if( p_mp4->i_track )
{
/* Flush the rest of samples and add the last sample_delta. */
uint32_t last_delta = largest_pts - second_largest_pts;
MP4_LOG_IF_ERR( lsmash_flush_pooled_samples( p_mp4->p_root, p_mp4->i_track, (last_delta ? last_delta : 1) * p_mp4->i_time_inc ),
"failed to flush the rest of samples.\n" );
if( p_mp4->i_movie_timescale != 0 && p_mp4->i_video_timescale != 0 ) /* avoid zero division */
actual_duration = ((double)((largest_pts + last_delta) * p_mp4->i_time_inc) / p_mp4->i_video_timescale) * p_mp4->i_movie_timescale;
else
MP4_LOG_ERROR( "timescale is broken.\n" );
/*
* Declare the explicit time-line mapping.
* A segment_duration is given by movie timescale, while a media_time that is the start time of this segment
* is given by not the movie timescale but rather the media timescale.
* The reason is that ISO media have two time-lines, presentation and media time-line,
* and an edit maps the presentation time-line to the media time-line.
* According to QuickTime file format specification and the actual playback in QuickTime Player,
* if the Edit Box doesn't exist in the track, the ratio of the summation of sample durations and track's duration becomes
* the track's media_rate so that the entire media can be used by the track.
* So, we add Edit Box here to avoid this implicit media_rate could distort track's presentation timestamps slightly.
* Note: Any demuxers should follow the Edit List Box if it exists.
*/
lsmash_edit_t edit;
edit.duration = actual_duration;
edit.start_time = p_mp4->i_first_cts;
edit.rate = ISOM_EDIT_MODE_NORMAL;
if( !p_mp4->b_fragments )
{
MP4_LOG_IF_ERR( lsmash_create_explicit_timeline_map( p_mp4->p_root, p_mp4->i_track, edit ),
"failed to set timeline map for video.\n" );
}
else if( !p_mp4->b_stdout )
MP4_LOG_IF_ERR( lsmash_modify_explicit_timeline_map( p_mp4->p_root, p_mp4->i_track, 1, edit ),
"failed to update timeline map for video.\n" );
}
MP4_LOG_IF_ERR( lsmash_finish_movie( p_mp4->p_root, NULL ), "failed to finish movie.\n" );
}
remove_mp4_hnd( p_mp4 ); /* including lsmash_destroy_root( p_mp4->p_root ); */
return 0;
}
bool fcMP4Muxer::mux(const Params ¶ms)
{
lsmash_root_t *root;
lsmash_file_parameters_t mp4_stream;
lsmash_file_parameters_t h264_stream;
lsmash_brand_type major_brand = ISOM_BRAND_TYPE_MP42;
lsmash_brand_type compatible_brands[2] = { ISOM_BRAND_TYPE_MP42, ISOM_BRAND_TYPE_ISOM };
uint32_t fps_num = params.frame_rate;
uint32_t fps_den = 1;
// 出力 mp4
root = lsmash_create_root();
if (lsmash_open_file(params.out_mp4_path, 0, &mp4_stream) != 0) {
return false;
}
mp4_stream.major_brand = major_brand;
mp4_stream.brands = compatible_brands;
mp4_stream.brand_count = sizeof(compatible_brands) / sizeof(compatible_brands[0]);
mp4_stream.minor_version = 0;
lsmash_set_file(root, &mp4_stream);
lsmash_movie_parameters_t movie_param;
lsmash_initialize_movie_parameters(&movie_param);
lsmash_set_movie_parameters(root, &movie_param);
int track_number = 1;
MP4TrackData track_data[2];
int num_track_data = 0;
if (params.in_h264_path) {
importer_t *h264_importer = lsmash_importer_open(params.in_h264_path, "H.264");
if (h264_importer == nullptr) { return false; }
int h264_track_id = lsmash_create_track(root, ISOM_MEDIA_HANDLER_TYPE_VIDEO_TRACK);
lsmash_track_parameters_t track_param;
lsmash_initialize_track_parameters(&track_param);
(int&)track_param.mode = ISOM_TRACK_IN_MOVIE | ISOM_TRACK_IN_PREVIEW;
int sample_entry = 0;
lsmash_summary_t *summary = lsmash_duplicate_summary(h264_importer, track_number);
auto video_summary = (lsmash_video_summary_t*)summary;
track_param.display_width = video_summary->width << 16;
track_param.display_height = video_summary->height << 16;
lsmash_set_track_parameters(root, h264_track_id, &track_param);
sample_entry = lsmash_add_sample_entry(root, h264_track_id, summary);
auto& td = track_data[num_track_data++];
td.importer = h264_importer;
td.summary = summary;
td.sample_entry = sample_entry;
td.track_number = track_number;
td.track_id = h264_track_id;
td.timescale = video_summary->timescale;
td.timebase = video_summary->timebase;
lsmash_media_parameters_t media_param;
lsmash_initialize_media_parameters(&media_param);
media_param.timescale = td.timescale;
lsmash_set_media_parameters(root, h264_track_id, &media_param);
}
if (params.in_aac_path) {
importer_t *aac_importer = lsmash_importer_open(params.in_aac_path, "adts");
if (aac_importer == nullptr) { return false; }
int aac_track_id = lsmash_create_track(root, ISOM_MEDIA_HANDLER_TYPE_AUDIO_TRACK);
lsmash_track_parameters_t track_param;
lsmash_initialize_track_parameters(&track_param);
(int&)track_param.mode = ISOM_TRACK_IN_MOVIE | ISOM_TRACK_IN_PREVIEW;
int sample_entry = 0;
lsmash_summary_t *summary = lsmash_duplicate_summary(aac_importer, track_number);
auto audio_summary = (lsmash_audio_summary_t*)summary;
lsmash_set_track_parameters(root, aac_track_id, &track_param);
sample_entry = lsmash_add_sample_entry(root, aac_track_id, summary);
auto& td = track_data[num_track_data++];
td.importer = aac_importer;
td.summary = summary;
td.sample_entry = sample_entry;
td.track_number = track_number;
td.track_id = aac_track_id;
td.timescale = audio_summary->frequency;
td.timebase = 1;
lsmash_media_parameters_t media_param;
lsmash_initialize_media_parameters(&media_param);
media_param.timescale = td.timescale;
lsmash_set_media_parameters(root, aac_track_id, &media_param);
}
double largest_dts = 0.0;
uint32_t num_consecutive_sample_skip = 0;
for (int ti = 0;;) {
auto &td = track_data[ti];
if (!td.sample) {
int ret = lsmash_importer_get_access_unit(td.importer, td.track_number, &td.sample);
if (ret <= -1) // error
{
lsmash_delete_sample(td.sample);
break;
}
else if (ret == 1) /* a change of stream's properties */
{
lsmash_cleanup_summary(td.summary);
td.summary = lsmash_duplicate_summary(td.importer, td.track_number);
td.sample_entry = lsmash_add_sample_entry(root, td.track_id, td.summary);
if (!td.sample_entry) { break; }
}
else if (ret == 2) /* EOF */
{
lsmash_delete_sample(td.sample);
break;
}
if (td.sample)
{
td.sample->index = td.sample_entry;
td.sample->dts *= td.timebase;
td.sample->cts *= td.timebase;
td.dts = (double)td.sample->dts / td.timescale;
}
}
if (td.sample) {
if (td.dts <= largest_dts || num_consecutive_sample_skip == num_track_data)
{
uint64_t sample_size = td.sample->length;
uint64_t sample_dts = td.sample->dts;
uint64_t sample_cts = td.sample->cts;
if (lsmash_append_sample(root, td.track_id, td.sample)) {
return false;
}
td.prev_dts = sample_dts;
td.sample = nullptr;
largest_dts = std::max<double>(largest_dts, td.dts);
num_consecutive_sample_skip = 0;
}
else {
// skip
++num_consecutive_sample_skip;
}
}
ti = (ti + 1) % num_track_data;
}
for (int i = 0; i < num_track_data; ++i) {
lsmash_flush_pooled_samples(root, track_data[i].track_id, fps_den);
lsmash_cleanup_summary(track_data[i].summary);
lsmash_importer_close(track_data[i].importer);
}
lsmash_finish_movie(root, nullptr);
lsmash_close_file(&mp4_stream);
lsmash_destroy_root(root);
return true;
}
