315 lines
9.4 KiB
C++
315 lines
9.4 KiB
C++
/*************************************************************************/
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/* audio_driver_coreaudio.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef COREAUDIO_ENABLED
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#include "audio_driver_coreaudio.h"
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#include "core/project_settings.h"
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#include "os/os.h"
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#define kOutputBus 0
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#ifdef OSX_ENABLED
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static OSStatus outputDeviceAddressCB(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *__nullable inClientData) {
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AudioDriverCoreAudio *driver = (AudioDriverCoreAudio *)inClientData;
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driver->reopen();
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return noErr;
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}
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#endif
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Error AudioDriverCoreAudio::initDevice() {
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AudioComponentDescription desc;
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zeromem(&desc, sizeof(desc));
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desc.componentType = kAudioUnitType_Output;
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#ifdef OSX_ENABLED
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desc.componentSubType = kAudioUnitSubType_HALOutput;
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#else
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desc.componentSubType = kAudioUnitSubType_RemoteIO;
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#endif
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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AudioComponent comp = AudioComponentFindNext(NULL, &desc);
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ERR_FAIL_COND_V(comp == NULL, FAILED);
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OSStatus result = AudioComponentInstanceNew(comp, &audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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AudioStreamBasicDescription strdesc;
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zeromem(&strdesc, sizeof(strdesc));
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UInt32 size = sizeof(strdesc);
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result = AudioUnitGetProperty(audio_unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, kOutputBus, &strdesc, &size);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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switch (strdesc.mChannelsPerFrame) {
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case 2: // Stereo
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case 4: // Surround 3.1
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case 6: // Surround 5.1
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case 8: // Surround 7.1
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channels = strdesc.mChannelsPerFrame;
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break;
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default:
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// Unknown number of channels, default to stereo
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channels = 2;
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break;
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}
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mix_rate = GLOBAL_DEF("audio/mix_rate", DEFAULT_MIX_RATE);
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zeromem(&strdesc, sizeof(strdesc));
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strdesc.mFormatID = kAudioFormatLinearPCM;
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strdesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
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strdesc.mChannelsPerFrame = channels;
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strdesc.mSampleRate = mix_rate;
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strdesc.mFramesPerPacket = 1;
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strdesc.mBitsPerChannel = 16;
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strdesc.mBytesPerFrame = strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
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strdesc.mBytesPerPacket = strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
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result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, kOutputBus, &strdesc, sizeof(strdesc));
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ERR_FAIL_COND_V(result != noErr, FAILED);
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int latency = GLOBAL_DEF("audio/output_latency", DEFAULT_OUTPUT_LATENCY);
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// Sample rate is independent of channels (ref: https://stackoverflow.com/questions/11048825/audio-sample-frequency-rely-on-channels)
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buffer_frames = closest_power_of_2(latency * mix_rate / 1000);
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#ifdef OSX_ENABLED
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result = AudioUnitSetProperty(audio_unit, kAudioDevicePropertyBufferFrameSize, kAudioUnitScope_Global, kOutputBus, &buffer_frames, sizeof(UInt32));
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ERR_FAIL_COND_V(result != noErr, FAILED);
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#endif
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buffer_size = buffer_frames * channels;
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samples_in.resize(buffer_size);
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if (OS::get_singleton()->is_stdout_verbose()) {
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print_line("CoreAudio: detected " + itos(channels) + " channels");
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print_line("CoreAudio: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
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}
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AURenderCallbackStruct callback;
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zeromem(&callback, sizeof(AURenderCallbackStruct));
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callback.inputProc = &AudioDriverCoreAudio::output_callback;
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callback.inputProcRefCon = this;
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result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, kOutputBus, &callback, sizeof(callback));
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ERR_FAIL_COND_V(result != noErr, FAILED);
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result = AudioUnitInitialize(audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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return OK;
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}
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Error AudioDriverCoreAudio::finishDevice() {
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OSStatus result;
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if (active) {
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result = AudioOutputUnitStop(audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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active = false;
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}
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result = AudioUnitUninitialize(audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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return OK;
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}
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Error AudioDriverCoreAudio::init() {
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OSStatus result;
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mutex = Mutex::create();
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active = false;
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channels = 2;
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#ifdef OSX_ENABLED
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outputDeviceAddress.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
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outputDeviceAddress.mScope = kAudioObjectPropertyScopeGlobal;
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outputDeviceAddress.mElement = kAudioObjectPropertyElementMaster;
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result = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &outputDeviceAddress, &outputDeviceAddressCB, this);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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#endif
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return initDevice();
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};
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Error AudioDriverCoreAudio::reopen() {
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bool restart = false;
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lock();
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if (active) {
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restart = true;
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}
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Error err = finishDevice();
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if (err != OK) {
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ERR_PRINT("finishDevice failed");
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unlock();
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return err;
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}
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err = initDevice();
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if (err != OK) {
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ERR_PRINT("initDevice failed");
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unlock();
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return err;
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}
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if (restart) {
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start();
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}
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unlock();
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return OK;
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}
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OSStatus AudioDriverCoreAudio::output_callback(void *inRefCon,
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AudioUnitRenderActionFlags *ioActionFlags,
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const AudioTimeStamp *inTimeStamp,
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UInt32 inBusNumber, UInt32 inNumberFrames,
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AudioBufferList *ioData) {
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AudioDriverCoreAudio *ad = (AudioDriverCoreAudio *)inRefCon;
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if (!ad->active || !ad->try_lock()) {
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for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
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AudioBuffer *abuf = &ioData->mBuffers[i];
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zeromem(abuf->mData, abuf->mDataByteSize);
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};
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return 0;
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};
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for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
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AudioBuffer *abuf = &ioData->mBuffers[i];
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int frames_left = inNumberFrames;
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int16_t *out = (int16_t *)abuf->mData;
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while (frames_left) {
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int frames = MIN(frames_left, ad->buffer_frames);
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ad->audio_server_process(frames, ad->samples_in.ptrw());
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for (int j = 0; j < frames * ad->channels; j++) {
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out[j] = ad->samples_in[j] >> 16;
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}
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frames_left -= frames;
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out += frames * ad->channels;
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};
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};
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ad->unlock();
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return 0;
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};
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void AudioDriverCoreAudio::start() {
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if (!active) {
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OSStatus result = AudioOutputUnitStart(audio_unit);
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if (result != noErr) {
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ERR_PRINT("AudioOutputUnitStart failed");
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} else {
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active = true;
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}
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}
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};
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int AudioDriverCoreAudio::get_mix_rate() const {
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return mix_rate;
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};
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AudioDriver::SpeakerMode AudioDriverCoreAudio::get_speaker_mode() const {
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return get_speaker_mode_by_total_channels(channels);
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};
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void AudioDriverCoreAudio::lock() {
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if (mutex)
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mutex->lock();
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};
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void AudioDriverCoreAudio::unlock() {
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if (mutex)
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mutex->unlock();
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};
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bool AudioDriverCoreAudio::try_lock() {
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if (mutex)
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return mutex->try_lock() == OK;
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return true;
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}
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void AudioDriverCoreAudio::finish() {
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OSStatus result;
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finishDevice();
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#ifdef OSX_ENABLED
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result = AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &outputDeviceAddress, &outputDeviceAddressCB, this);
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if (result != noErr) {
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ERR_PRINT("AudioObjectRemovePropertyListener failed");
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}
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#endif
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AURenderCallbackStruct callback;
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zeromem(&callback, sizeof(AURenderCallbackStruct));
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result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, kOutputBus, &callback, sizeof(callback));
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if (result != noErr) {
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ERR_PRINT("AudioUnitSetProperty failed");
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}
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if (mutex) {
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memdelete(mutex);
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mutex = NULL;
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}
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};
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AudioDriverCoreAudio::AudioDriverCoreAudio() {
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active = false;
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mutex = NULL;
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mix_rate = 0;
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channels = 2;
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buffer_size = 0;
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buffer_frames = 0;
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samples_in.clear();
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};
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AudioDriverCoreAudio::~AudioDriverCoreAudio(){};
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#endif
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