uint32_t
MP4Metadata::GetNumberTracks(mozilla::TrackInfo::TrackType aType) const
{
static LazyLogModule sLog("MP4Metadata");
uint32_t numTracks = mStagefright->GetNumberTracks(aType);
#ifdef MOZ_RUST_MP4PARSE
if (!mRust) {
return numTracks;
}
uint32_t numTracksRust = mRust->GetNumberTracks(aType);
MOZ_LOG(sLog, LogLevel::Info, ("%s tracks found: stagefright=%u rust=%u",
TrackTypeToString(aType), numTracks, numTracksRust));
if (!mReportedTelemetry) {
bool numTracksMatch = numTracks == numTracksRust;
if (aType == mozilla::TrackInfo::kAudioTrack) {
Telemetry::Accumulate(Telemetry::MEDIA_RUST_MP4PARSE_TRACK_MATCH_AUDIO,
numTracksMatch);
} else if (aType == mozilla::TrackInfo::kVideoTrack) {
Telemetry::Accumulate(Telemetry::MEDIA_RUST_MP4PARSE_TRACK_MATCH_VIDEO,
numTracksMatch);
}
mReportedTelemetry = true;
}
#endif
return numTracks;
}
MP4Metadata::ResultAndTrackCount MP4Metadata::GetNumberTracks(
mozilla::TrackInfo::TrackType aType) const {
uint32_t tracks;
auto rv = mp4parse_get_track_count(mParser.get(), &tracks);
if (rv != MP4PARSE_STATUS_OK) {
MOZ_LOG(gMP4MetadataLog, LogLevel::Warning,
("rust parser error %d counting tracks", rv));
return {MediaResult(NS_ERROR_DOM_MEDIA_METADATA_ERR,
RESULT_DETAIL("Rust parser error %d", rv)),
MP4Metadata::NumberTracksError()};
}
uint32_t total = 0;
for (uint32_t i = 0; i < tracks; ++i) {
Mp4parseTrackInfo track_info;
rv = mp4parse_get_track_info(mParser.get(), i, &track_info);
if (rv != MP4PARSE_STATUS_OK) {
continue;
}
if (track_info.track_type == MP4PARSE_TRACK_TYPE_AUDIO) {
Mp4parseTrackAudioInfo audio;
auto rv = mp4parse_get_track_audio_info(mParser.get(), i, &audio);
if (rv != MP4PARSE_STATUS_OK) {
MOZ_LOG(gMP4MetadataLog, LogLevel::Warning,
("mp4parse_get_track_audio_info returned error %d", rv));
continue;
}
MOZ_DIAGNOSTIC_ASSERT(audio.sample_info_count > 0,
"Must have at least one audio sample info");
if (audio.sample_info_count == 0) {
return {
MediaResult(
NS_ERROR_DOM_MEDIA_METADATA_ERR,
RESULT_DETAIL(
"Got 0 audio sample info while checking number tracks")),
MP4Metadata::NumberTracksError()};
}
// We assume the codec of the first sample info is representative of the
// whole track and skip it if we don't recognize the codec.
if (audio.sample_info[0].codec_type == MP4PARSE_CODEC_UNKNOWN) {
continue;
}
} else if (track_info.track_type == MP4PARSE_TRACK_TYPE_VIDEO) {
Mp4parseTrackVideoInfo video;
auto rv = mp4parse_get_track_video_info(mParser.get(), i, &video);
if (rv != MP4PARSE_STATUS_OK) {
MOZ_LOG(gMP4MetadataLog, LogLevel::Warning,
("mp4parse_get_track_video_info returned error %d", rv));
continue;
}
MOZ_DIAGNOSTIC_ASSERT(video.sample_info_count > 0,
"Must have at least one video sample info");
if (video.sample_info_count == 0) {
return {
MediaResult(
NS_ERROR_DOM_MEDIA_METADATA_ERR,
RESULT_DETAIL(
"Got 0 video sample info while checking number tracks")),
MP4Metadata::NumberTracksError()};
}
// We assume the codec of the first sample info is representative of the
// whole track and skip it if we don't recognize the codec.
if (video.sample_info[0].codec_type == MP4PARSE_CODEC_UNKNOWN) {
continue;
}
} else {
// Only audio and video are supported
continue;
}
if (TrackTypeEqual(aType, track_info.track_type)) {
total += 1;
}
}
MOZ_LOG(gMP4MetadataLog, LogLevel::Info,
("%s tracks found: %u", TrackTypeToString(aType), total));
return {NS_OK, total};
}
