extract_cue_regions()

std::vector< FileRegion > MayaFlux::IO::AudioStreamContext::extract_cue_regions

(

const FFmpegDemuxContext &

demux

)

const

Extract cue/marker regions from stream metadata tags.

Parameters

demux

The demux context.

Returns

Vector of FileRegion with type="cue" or "marker".

Definition at line 205 of file AudioStreamContext.cpp.

{
    std::vector<FileRegion> regions;
    if (stream_index < 0 || sample_rate == 0)
        return regions;
 
    AVStream* stream = demux.get_stream(stream_index);
    if (!stream)
        return regions;
 
    AVDictionaryEntry* tag = nullptr;
    int idx = 0;
    while ((tag = av_dict_get(stream->metadata, "cue", tag, AV_DICT_IGNORE_SUFFIX))) {
        FileRegion r;
        r.type = "cue";
        r.name = tag->value;
        r.start_coordinates = { static_cast<uint64_t>(idx) };
        r.end_coordinates = { static_cast<uint64_t>(idx) };
        r.attributes["label"] = std::string(tag->value);
        regions.push_back(std::move(r));
        ++idx;
    }
    return regions;
}

References MayaFlux::IO::FileRegion::attributes, MayaFlux::IO::FileRegion::end_coordinates, MayaFlux::IO::FFmpegDemuxContext::get_stream(), MayaFlux::IO::FileRegion::name, sample_rate, MayaFlux::IO::FileRegion::start_coordinates, stream_index, and MayaFlux::IO::FileRegion::type.

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