/*************************************************************************/ /* audio_driver_rtaudio.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* http://www.godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #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 } int AudioDriverRtAudio::callback( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames, double streamTime, RtAudioStreamStatus status, void *userData ) { if (status) { if (status & RTAUDIO_INPUT_OVERFLOW) { WARN_PRINT("RtAudio input overflow!"); } if (status & RTAUDIO_OUTPUT_UNDERFLOW) { WARN_PRINT("RtAudio output underflow!"); } } 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;iaudio_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; // set the desired numberOfBuffers unsigned int target_number_of_buffers = 4; options.numberOfBuffers = target_number_of_buffers; // 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); // calculate desired buffer_size, taking the desired numberOfBuffers into account (latency depends on numberOfBuffers*buffer_size) unsigned int buffer_size = nearest_power_of_2( latency * mix_rate / 1000 / target_number_of_buffers); if (OS::get_singleton()->is_stdout_verbose()) { print_line("audio buffer size: "+itos(buffer_size)); } short int tries = 2; while(true) { 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 ( RtAudioError& 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; }; } } // compare actual numberOfBuffers with the desired one. If not equal, close and reopen the stream with adjusted buffer size, so the desired output_latency is still correct if(target_number_of_buffers != options.numberOfBuffers) { if(tries <= 0) { ERR_EXPLAIN("RtAudio: Unable to set correct number of buffers."); ERR_FAIL_V( ERR_UNAVAILABLE ); break; } try { dac->closeStream(); } catch ( RtAudioError& e ) { ERR_PRINT(e.what()); ERR_FAIL_V( ERR_UNAVAILABLE ); break; } if (OS::get_singleton()->is_stdout_verbose()) print_line("RtAudio: Desired number of buffers (" + itos(target_number_of_buffers) + ") not available. Using " + itos(options.numberOfBuffers) + " instead. Reopening stream with adjusted buffer_size."); // new buffer size dependent on the ratio between set and actual numberOfBuffers buffer_size = buffer_size / (options.numberOfBuffers / target_number_of_buffers); target_number_of_buffers = options.numberOfBuffers; tries--; } else { 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