diff options
Diffstat (limited to 'drivers/rtaudio/audio_driver_rtaudio.cpp')
| -rw-r--r-- | drivers/rtaudio/audio_driver_rtaudio.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/rtaudio/audio_driver_rtaudio.cpp b/drivers/rtaudio/audio_driver_rtaudio.cpp new file mode 100644 index 000000000..ac8f50217 --- /dev/null +++ b/drivers/rtaudio/audio_driver_rtaudio.cpp @@ -0,0 +1,188 @@ +/*************************************************/ +/* audio_driver_rtaudio.cpp */ +/*************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/*************************************************/ +/* Source code within this file is: */ +/* (c) 2007-2010 Juan Linietsky, Ariel Manzur */ +/* All Rights Reserved. */ +/*************************************************/ + +#include "audio_driver_rtaudio.h" +#include "globals.h" +#include "os/os.h" +#ifdef RTAUDIO_ENABLED + +const char* AudioDriverRtAudio::get_name() const { + +#ifdef OSX_ENABLED + return "RtAudio-OSX"; +#elif defined(UNIX_ENABLED) + return "RtAudio-ALSA"; +#elif defined(WINDOWS_ENABLED) + return "RtAudio-DirectSound"; +#else + return "RtAudio-None"; +#endif + +} + +// Two-channel sawtooth wave generator. +int AudioDriverRtAudio::callback( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames, + double streamTime, RtAudioStreamStatus status, void *userData ) { + + if (status) + print_line("lost?"); + int32_t *buffer = (int32_t *) outputBuffer; + + AudioDriverRtAudio *self = (AudioDriverRtAudio*)userData; + + if (self->mutex->try_lock()!=OK) { + + + // what should i do.. + for(unsigned int i=0;i<nBufferFrames;i++) + buffer[i]=0; + + return 0; + } + + self->audio_server_process(nBufferFrames,buffer); + + self->mutex->unlock();; + + return 0; +} + +Error AudioDriverRtAudio::init() { + + active=false; + mutex=NULL; + dac = memnew( RtAudio ); + + ERR_EXPLAIN("Cannot initialize RtAudio audio driver: No devices present.") + ERR_FAIL_COND_V( dac->getDeviceCount() < 1, ERR_UNAVAILABLE ); + + String channels = GLOBAL_DEF("audio/output","stereo"); + + if (channels=="5.1") + output_format=OUTPUT_5_1; + else if (channels=="quad") + output_format=OUTPUT_QUAD; + else if (channels=="mono") + output_format=OUTPUT_MONO; + else + output_format=OUTPUT_STEREO; + + + RtAudio::StreamParameters parameters; + parameters.deviceId = dac->getDefaultOutputDevice(); + RtAudio::StreamOptions options; +// options. +// RtAudioStreamFlags flags; /*!< A bit-mask of stream flags (RTAUDIO_NONINTERLEAVED, RTAUDIO_MINIMIZE_LATENCY, RTAUDIO_HOG_DEVICE). */// +// unsigned int numberOfBuffers; /*!< Number of stream buffers. */ +// std::string streamName; /*!< A stream name (currently used only in Jack). */ +// int priority; /*!< Scheduling priority of callback thread (only used with flag RTAUDIO_SCHEDULE_REALTIME). */ + + + parameters.firstChannel = 0; + mix_rate = GLOBAL_DEF("audio/mix_rate",44100); + + int latency = GLOBAL_DEF("audio/output_latency",25); + unsigned int buffer_size = nearest_power_of_2( latency * mix_rate / 1000 ); + if (OS::get_singleton()->is_stdout_verbose()) { + print_line("audio buffer size: "+itos(buffer_size)); + } + +// bool success=false; + + while( true) { + + switch(output_format) { + + case OUTPUT_MONO: parameters.nChannels = 1; break; + case OUTPUT_STEREO: parameters.nChannels = 2; break; + case OUTPUT_QUAD: parameters.nChannels = 4; break; + case OUTPUT_5_1: parameters.nChannels = 6; break; + }; + + + try { + dac->openStream( ¶meters, NULL, RTAUDIO_SINT32, + mix_rate, &buffer_size, &callback, this,&options ); + mutex = Mutex::create(true); + active=true; + + break; + } catch ( RtError& e ) { + // try with less channels + + ERR_PRINT("Unable to open audio, retrying with fewer channels.."); + + switch(output_format) { + + case OUTPUT_MONO: ERR_EXPLAIN("Unable to open audio."); ERR_FAIL_V( ERR_UNAVAILABLE ); break; + case OUTPUT_STEREO: output_format=OUTPUT_MONO; break; + case OUTPUT_QUAD: output_format=OUTPUT_STEREO; break; + case OUTPUT_5_1: output_format=OUTPUT_QUAD; break; + }; + } + } + + + return OK; +} + + +int AudioDriverRtAudio::get_mix_rate() const { + + return mix_rate; +} + +AudioDriverSW::OutputFormat AudioDriverRtAudio::get_output_format() const { + + return output_format; +} + +void AudioDriverRtAudio::start() { + + if (active) + dac->startStream(); +} + +void AudioDriverRtAudio::lock() { + + if (mutex) + mutex->lock(); +} + +void AudioDriverRtAudio::unlock() { + + if (mutex) + mutex->unlock(); +} + +void AudioDriverRtAudio::finish() { + + + if ( active && dac->isStreamOpen() ) + dac->closeStream(); + if (mutex) + memdelete(mutex); + if (dac) + memdelete(dac); +} + + + +AudioDriverRtAudio::AudioDriverRtAudio() +{ + mutex=NULL; + mix_rate=44100; + output_format=OUTPUT_STEREO; +} + + + +#endif |