mirror of https://github.com/OpenTTD/OpenTTD.git
140 lines
5.1 KiB
C++
140 lines
5.1 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file cocoa_s.cpp Sound driver for cocoa. */
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/*****************************************************************************
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* Cocoa sound driver *
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* Known things left to do: *
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* - Might need to do endian checking for it to work on both ppc and x86 *
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*****************************************************************************/
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#ifdef WITH_COCOA
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#include "../stdafx.h"
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#include "../os/macosx/macos.h"
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#include "../debug.h"
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#include "../driver.h"
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#include "../mixer.h"
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#include "../core/endian_type.hpp"
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#include "cocoa_s.h"
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#define Rect OTTDRect
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#define Point OTTDPoint
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#include <AudioUnit/AudioUnit.h>
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#undef Rect
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#undef Point
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#include "../safeguards.h"
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static FSoundDriver_Cocoa iFSoundDriver_Cocoa;
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static AudioUnit _outputAudioUnit;
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/* The CoreAudio callback */
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static OSStatus audioCallback(void *, AudioUnitRenderActionFlags *, const AudioTimeStamp *, UInt32, UInt32, AudioBufferList *ioData)
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{
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MxMixSamples(ioData->mBuffers[0].mData, ioData->mBuffers[0].mDataByteSize / 4);
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return noErr;
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}
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std::optional<std::string_view> SoundDriver_Cocoa::Start(const StringList &parm)
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{
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struct AURenderCallbackStruct callback;
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AudioStreamBasicDescription requestedDesc;
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/* Setup a AudioStreamBasicDescription with the requested format */
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requestedDesc.mFormatID = kAudioFormatLinearPCM;
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requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
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requestedDesc.mChannelsPerFrame = 2;
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requestedDesc.mSampleRate = GetDriverParamInt(parm, "hz", 44100);
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requestedDesc.mBitsPerChannel = 16;
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requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
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#if TTD_ENDIAN == TTD_BIG_ENDIAN
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requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
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#endif /* TTD_ENDIAN == TTD_BIG_ENDIAN */
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requestedDesc.mFramesPerPacket = 1;
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requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
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requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
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MxInitialize((uint)requestedDesc.mSampleRate);
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/* Locate the default output audio unit */
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AudioComponentDescription desc;
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = kAudioUnitSubType_HALOutput;
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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AudioComponent comp = AudioComponentFindNext (nullptr, &desc);
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if (comp == nullptr) {
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return "cocoa_s: Failed to start CoreAudio: AudioComponentFindNext returned nullptr";
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}
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/* Open & initialize the default output audio unit */
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if (AudioComponentInstanceNew(comp, &_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioComponentInstanceNew";
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}
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if (AudioUnitInitialize(_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitInitialize";
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}
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/* Set the input format of the audio unit. */
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &requestedDesc, sizeof(requestedDesc)) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)";
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}
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/* Set the audio callback */
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callback.inputProc = audioCallback;
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callback.inputProcRefCon = nullptr;
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)";
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}
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/* Finally, start processing of the audio unit */
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if (AudioOutputUnitStart(_outputAudioUnit) != noErr) {
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return "cocoa_s: Failed to start CoreAudio: AudioOutputUnitStart";
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}
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/* We're running! */
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return std::nullopt;
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}
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void SoundDriver_Cocoa::Stop()
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{
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struct AURenderCallbackStruct callback;
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/* stop processing the audio unit */
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if (AudioOutputUnitStop(_outputAudioUnit) != noErr) {
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Debug(driver, 0, "cocoa_s: Core_CloseAudio: AudioOutputUnitStop failed");
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return;
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}
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/* Remove the input callback */
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callback.inputProc = 0;
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callback.inputProcRefCon = 0;
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if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
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Debug(driver, 0, "cocoa_s: Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback) failed");
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return;
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}
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if (AudioComponentInstanceDispose(_outputAudioUnit) != noErr) {
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Debug(driver, 0, "cocoa_s: Core_CloseAudio: AudioComponentInstanceDispose failed");
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return;
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}
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}
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#endif /* WITH_COCOA */
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