audioDecodeCallback()

void fl::third_party::SoftwareMpeg1Decoder::audioDecodeCallback ( fl::third_party::plm_t * plm, fl::third_party::plm_samples_t * samples, void * user )

static

Definition at line 112 of file software_decoder.cpp.hpp.

                                                                                                                                        {
    FL_UNUSED(plm_ptr);
    auto* decoder = static_cast<SoftwareMpeg1Decoder*>(user);
 
    if (!decoder || !samples || !decoder->config_.audioCallback) {
        return;
    }
 
    // Convert float samples to i16 PCM
    // pl_mpeg provides interleaved stereo samples as floats in range [-1.0, 1.0]
    fl::vector<fl::i16> pcm;
    pcm.reserve(samples->count * 2);  // stereo
 
    for (unsigned i = 0; i < samples->count * 2; i++) {
        float sample = samples->interleaved[i];
        // Clamp and convert to i16 range
        sample = sample < -1.0f ? -1.0f : (sample > 1.0f ? 1.0f : sample);
        pcm.push_back(static_cast<fl::i16>(sample * 32767.0f));
    }
 
    // Create audio::Sample with timestamp in milliseconds
    fl::u32 timestampMs = static_cast<fl::u32>(samples->time * 1000.0);
    audio::Sample audioSample(fl::span<const fl::i16>(pcm.data(), pcm.size()), timestampMs);
 
    // Call the user's audio callback
    decoder->config_.audioCallback(audioSample);
}

References SoftwareMpeg1Decoder(), fl::vector< T >::data(), fl::FL_NO_EXCEPT, FL_UNUSED, fl::vector< T >::push_back(), fl::vector< T >::reserve(), fl::sample(), and fl::vector_basic::size().

Referenced by initializeDecoder(), and setAudioCallback().

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