HRESULT UncompressedAudioSampleProvider::AllocateResources()

in FFmpegInterop/Source/UncompressedAudioSampleProvider.cpp [37:75]

32 lines of code
6 McCabe index (conditional complexity)


HRESULT UncompressedAudioSampleProvider::AllocateResources()
{
	HRESULT hr = S_OK;
	hr = UncompressedSampleProvider::AllocateResources();
	if (SUCCEEDED(hr))
	{
		// Set default channel layout when the value is unknown (0)
		int64 inChannelLayout = m_pAvCodecCtx->channel_layout ? m_pAvCodecCtx->channel_layout : av_get_default_channel_layout(m_pAvCodecCtx->channels);
		int64 outChannelLayout = av_get_default_channel_layout(m_pAvCodecCtx->channels);

		// Set up resampler to convert any PCM format (e.g. AV_SAMPLE_FMT_FLTP) to AV_SAMPLE_FMT_S16 PCM format that is expected by Media Element.
		// Additional logic can be added to avoid resampling PCM data that is already in AV_SAMPLE_FMT_S16_PCM.
		m_pSwrCtx = swr_alloc_set_opts(
			NULL,
			outChannelLayout,
			AV_SAMPLE_FMT_S16,
			m_pAvCodecCtx->sample_rate,
			inChannelLayout,
			m_pAvCodecCtx->sample_fmt,
			m_pAvCodecCtx->sample_rate,
			0,
			NULL);

		if (!m_pSwrCtx)
		{
			hr = E_OUTOFMEMORY;
		}
	}

	if (SUCCEEDED(hr))
	{
		if (swr_init(m_pSwrCtx) < 0)
		{
			hr = E_FAIL;
		}
	}

	return hr;
}