decodeNextFrame()

bool fl::VorbisDecoderImpl::decodeNextFrame

(

audio::Sample *

outSample

)

Definition at line 191 of file vorbis.cpp.hpp.

                                                              {
    if (!mDecoder.isOpen() || mEndOfStream) {
        return false;
    }
 
    VorbisInfo info = mDecoder.getInfo();
    fl::i32 channels = info.channels > 0 ? info.channels : 1;
 
    // Decode to i16 interleaved
    fl::i32 samplesDecoded = mDecoder.getSamplesShortInterleaved(
        channels,
        mPcmBuffer.data(),
        static_cast<fl::i32>(mPcmBuffer.size())
    );
 
    if (samplesDecoded == 0) {
        mEndOfStream = true;
        mPosition = mFileData.size();  // At end of stream
        return false;
    }
 
    // Update position estimate based on sample offset ratio
    fl::u32 totalSamples = mDecoder.getTotalSamples();
    if (totalSamples > 0) {
        fl::u32 currentSample = mDecoder.getSampleOffset();
        mPosition = (mFileData.size() * currentSample) / totalSamples;
    }
 
    // Convert stereo to mono by averaging if needed
    if (channels == 2) {
        fl::vector<fl::i16> mono;
        mono.reserve(samplesDecoded);
        for (fl::i32 i = 0; i < samplesDecoded; ++i) {
            fl::i32 left = mPcmBuffer[i * 2];
            fl::i32 right = mPcmBuffer[i * 2 + 1];
            mono.push_back(static_cast<fl::i16>((left + right) / 2));
        }
        *outSample = audio::Sample(mono);
    } else {
        *outSample = audio::Sample(fl::span<const fl::i16>(mPcmBuffer.data(), samplesDecoded));
    }
 
    return true;
}

References fl::VorbisInfo::channels, mDecoder, mEndOfStream, mFileData, mPcmBuffer, mPosition, fl::vector< T >::push_back(), and fl::vector< T >::reserve().

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