open()

void MayaFlux::Core::RtAudioStream::open ( )

overridevirtual

Initializes the audio stream and allocates required resources.

Opens the RtAudio stream with the configured parameters, making it ready for data transfer. Does not start the actual data flow.

Implements MayaFlux::Core::AudioStream.

Definition at line 210 of file RtAudioBackend.cpp.

{
    if (is_open()) {
        return;
    }
 
    try {
        RtAudioFormat format = RTAUDIO_FLOAT64;
 
        switch (m_stream_info.format) {
        case GlobalStreamInfo::AudioFormat::FLOAT32:
            format = RTAUDIO_FLOAT32;
            break;
        case GlobalStreamInfo::AudioFormat::FLOAT64:
            format = RTAUDIO_FLOAT64;
            break;
        case GlobalStreamInfo::AudioFormat::INT16:
            format = RTAUDIO_SINT16;
            break;
        case GlobalStreamInfo::AudioFormat::INT24:
            format = RTAUDIO_SINT24;
            break;
        case GlobalStreamInfo::AudioFormat::INT32:
            format = RTAUDIO_SINT32;
            break;
        }
 
        RtAudio::StreamParameters* inputParamsPtr = nullptr;
 
        if (m_stream_info.input.enabled && m_stream_info.input.channels > 0) {
            // inputParams.deviceId = m_stream_info.input.device_id >= 0 ? m_stream_info.input.device_id : m_context->getDefaultInputDevice();
            m_in_parameters.nChannels = m_stream_info.input.channels;
            // inputParams.firstChannel = 0;
            inputParamsPtr = &m_in_parameters;
        }
 
        RtAudioSingleton::mark_stream_open();
 
        m_context->openStream(
            &m_out_parameters,
            inputParamsPtr,
            format,
            m_stream_info.sample_rate,
            &m_stream_info.buffer_size,
            &RtAudioStream::rtAudioCallback,
            this,
            &m_options);
 
        m_isOpen = true;
    } catch (const RtAudioErrorType& e) {
        RtAudioSingleton::mark_stream_closed();
        m_isOpen = false;
 
        error_rethrow(
            Journal::Component::Core,
            Journal::Context::AudioBackend,
            std::source_location::current(),
            "Failed to open RtAudio stream: {}",
            m_context->getErrorText());
    }
}

References MayaFlux::Journal::AudioBackend, MayaFlux::Core::GlobalStreamInfo::buffer_size, MayaFlux::Core::GlobalStreamInfo::ChannelConfig::channels, MayaFlux::Journal::Core, MayaFlux::Core::GlobalStreamInfo::ChannelConfig::enabled, MayaFlux::Core::GlobalStreamInfo::FLOAT32, MayaFlux::Core::GlobalStreamInfo::FLOAT64, MayaFlux::Core::GlobalStreamInfo::format, MayaFlux::Core::GlobalStreamInfo::input, MayaFlux::Core::GlobalStreamInfo::INT16, MayaFlux::Core::GlobalStreamInfo::INT24, MayaFlux::Core::GlobalStreamInfo::INT32, is_open(), m_context, m_in_parameters, m_isOpen, m_options, m_out_parameters, m_stream_info, MayaFlux::Core::RtAudioSingleton::mark_stream_closed(), MayaFlux::Core::RtAudioSingleton::mark_stream_open(), rtAudioCallback(), and MayaFlux::Core::GlobalStreamInfo::sample_rate.

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