Function FfmpegScanStream

src/decoder/plugins/FfmpegDecoderPlugin.cxx:604–649

}

static bool
FfmpegScanStream(AVFormatContext &format_context, TagHandler &handler)
{
	const int find_result =
		avformat_find_stream_info(&format_context, nullptr);
	if (find_result < 0)
		return false;

	const int audio_stream = ffmpeg_find_audio_stream(format_context);
	if (audio_stream < 0)
		return false;

	const AVStream &stream = *format_context.streams[audio_stream];
	if (stream.duration != (int64_t)AV_NOPTS_VALUE)
		handler.OnDuration(FromFfmpegTime(stream.duration,
						  stream.time_base));
	else if (format_context.duration != (int64_t)AV_NOPTS_VALUE)
		handler.OnDuration(FromFfmpegTime(format_context.duration,
						  AV_TIME_BASE_Q));

	const auto &codec_params = *stream.codecpar;

#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(57, 25, 100)
	const unsigned channels = codec_params.ch_layout.nb_channels;
#else
	const unsigned channels = codec_params.channels;
#endif

	try {
		handler.OnAudioFormat(CheckAudioFormat(codec_params.sample_rate,
						       ffmpeg_sample_format(AVSampleFormat(codec_params.format)),
						       channels));
	} catch (...) {
	}

	FfmpegScanMetadata(format_context, audio_stream, handler);

	if (handler.WantPicture()) {
		const auto *picture_stream = FindPictureStream(format_context);
		if (picture_stream != nullptr)
			handler.OnPicture(GetMimeType(*picture_stream),
					  ToSpan(picture_stream->attached_pic));
	}

	return true;
}

static bool
ffmpeg_scan_stream(InputStream &is, TagHandler &handler)