189 lines
4.3 KiB
C++
189 lines
4.3 KiB
C++
/*************************************************/
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/* audio_driver_rtaudio.cpp */
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/*************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/*************************************************/
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/* Source code within this file is: */
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/* (c) 2007-2010 Juan Linietsky, Ariel Manzur */
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/* All Rights Reserved. */
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/*************************************************/
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#include "audio_driver_rtaudio.h"
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#include "globals.h"
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#include "os/os.h"
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#ifdef RTAUDIO_ENABLED
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const char* AudioDriverRtAudio::get_name() const {
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#ifdef OSX_ENABLED
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return "RtAudio-OSX";
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#elif defined(UNIX_ENABLED)
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return "RtAudio-ALSA";
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#elif defined(WINDOWS_ENABLED)
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return "RtAudio-DirectSound";
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#else
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return "RtAudio-None";
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#endif
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}
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// Two-channel sawtooth wave generator.
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int AudioDriverRtAudio::callback( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
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double streamTime, RtAudioStreamStatus status, void *userData ) {
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if (status)
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print_line("lost?");
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int32_t *buffer = (int32_t *) outputBuffer;
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AudioDriverRtAudio *self = (AudioDriverRtAudio*)userData;
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if (self->mutex->try_lock()!=OK) {
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// what should i do..
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for(unsigned int i=0;i<nBufferFrames;i++)
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buffer[i]=0;
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return 0;
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}
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self->audio_server_process(nBufferFrames,buffer);
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self->mutex->unlock();;
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return 0;
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}
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Error AudioDriverRtAudio::init() {
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active=false;
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mutex=NULL;
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dac = memnew( RtAudio );
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ERR_EXPLAIN("Cannot initialize RtAudio audio driver: No devices present.")
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ERR_FAIL_COND_V( dac->getDeviceCount() < 1, ERR_UNAVAILABLE );
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String channels = GLOBAL_DEF("audio/output","stereo");
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if (channels=="5.1")
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output_format=OUTPUT_5_1;
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else if (channels=="quad")
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output_format=OUTPUT_QUAD;
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else if (channels=="mono")
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output_format=OUTPUT_MONO;
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else
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output_format=OUTPUT_STEREO;
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RtAudio::StreamParameters parameters;
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parameters.deviceId = dac->getDefaultOutputDevice();
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RtAudio::StreamOptions options;
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// options.
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// RtAudioStreamFlags flags; /*!< A bit-mask of stream flags (RTAUDIO_NONINTERLEAVED, RTAUDIO_MINIMIZE_LATENCY, RTAUDIO_HOG_DEVICE). *///
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// unsigned int numberOfBuffers; /*!< Number of stream buffers. */
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// std::string streamName; /*!< A stream name (currently used only in Jack). */
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// int priority; /*!< Scheduling priority of callback thread (only used with flag RTAUDIO_SCHEDULE_REALTIME). */
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parameters.firstChannel = 0;
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mix_rate = GLOBAL_DEF("audio/mix_rate",44100);
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int latency = GLOBAL_DEF("audio/output_latency",25);
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unsigned int buffer_size = nearest_power_of_2( latency * mix_rate / 1000 );
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if (OS::get_singleton()->is_stdout_verbose()) {
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print_line("audio buffer size: "+itos(buffer_size));
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}
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// bool success=false;
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while( true) {
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switch(output_format) {
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case OUTPUT_MONO: parameters.nChannels = 1; break;
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case OUTPUT_STEREO: parameters.nChannels = 2; break;
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case OUTPUT_QUAD: parameters.nChannels = 4; break;
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case OUTPUT_5_1: parameters.nChannels = 6; break;
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};
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try {
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dac->openStream( ¶meters, NULL, RTAUDIO_SINT32,
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mix_rate, &buffer_size, &callback, this,&options );
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mutex = Mutex::create(true);
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active=true;
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break;
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} catch ( RtAudioError& e ) {
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// try with less channels
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ERR_PRINT("Unable to open audio, retrying with fewer channels..");
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switch(output_format) {
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case OUTPUT_MONO: ERR_EXPLAIN("Unable to open audio."); ERR_FAIL_V( ERR_UNAVAILABLE ); break;
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case OUTPUT_STEREO: output_format=OUTPUT_MONO; break;
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case OUTPUT_QUAD: output_format=OUTPUT_STEREO; break;
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case OUTPUT_5_1: output_format=OUTPUT_QUAD; break;
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};
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}
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}
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return OK;
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}
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int AudioDriverRtAudio::get_mix_rate() const {
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return mix_rate;
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}
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AudioDriverSW::OutputFormat AudioDriverRtAudio::get_output_format() const {
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return output_format;
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}
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void AudioDriverRtAudio::start() {
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if (active)
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dac->startStream();
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}
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void AudioDriverRtAudio::lock() {
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if (mutex)
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mutex->lock();
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}
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void AudioDriverRtAudio::unlock() {
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if (mutex)
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mutex->unlock();
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}
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void AudioDriverRtAudio::finish() {
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if ( active && dac->isStreamOpen() )
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dac->closeStream();
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if (mutex)
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memdelete(mutex);
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if (dac)
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memdelete(dac);
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}
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AudioDriverRtAudio::AudioDriverRtAudio()
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{
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mutex=NULL;
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mix_rate=44100;
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output_format=OUTPUT_STEREO;
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}
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#endif
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