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Location: cpp/openttd-patchpack/source/src/sound/cocoa_s.cpp - annotation
r20923:4c89cb662d11
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(svn r25970) -Fix [FS#5787]: [SDL] Recursive mutex locking when changing blitter
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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file cocoa_s.cpp Sound driver for cocoa. */
/*****************************************************************************
* Cocoa sound driver *
* Known things left to do: *
* - Might need to do endian checking for it to work on both ppc and x86 *
*****************************************************************************/
#ifdef WITH_COCOA
#include "../stdafx.h"
#include "../debug.h"
#include "../driver.h"
#include "../mixer.h"
#include "../core/endian_type.hpp"
#include "cocoa_s.h"
#define Rect OTTDRect
#define Point OTTDPoint
#include <AudioUnit/AudioUnit.h>
#undef Rect
#undef Point
static FSoundDriver_Cocoa iFSoundDriver_Cocoa;
static AudioUnit _outputAudioUnit;
/* The CoreAudio callback */
static OSStatus audioCallback(void *inRefCon, AudioUnitRenderActionFlags *inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList * ioData)
{
MxMixSamples(ioData->mBuffers[0].mData, ioData->mBuffers[0].mDataByteSize / 4);
return noErr;
}
const char *SoundDriver_Cocoa::Start(const char * const *parm)
{
Component comp;
ComponentDescription desc;
struct AURenderCallbackStruct callback;
AudioStreamBasicDescription requestedDesc;
/* Setup a AudioStreamBasicDescription with the requested format */
requestedDesc.mFormatID = kAudioFormatLinearPCM;
requestedDesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
requestedDesc.mChannelsPerFrame = 2;
requestedDesc.mSampleRate = GetDriverParamInt(parm, "hz", 44100);
requestedDesc.mBitsPerChannel = 16;
requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
#if TTD_ENDIAN == TTD_BIG_ENDIAN
requestedDesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
#endif /* TTD_ENDIAN == TTD_BIG_ENDIAN */
requestedDesc.mFramesPerPacket = 1;
requestedDesc.mBytesPerFrame = requestedDesc.mBitsPerChannel * requestedDesc.mChannelsPerFrame / 8;
requestedDesc.mBytesPerPacket = requestedDesc.mBytesPerFrame * requestedDesc.mFramesPerPacket;
MxInitialize((uint)requestedDesc.mSampleRate);
/* Locate the default output audio unit */
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_HALOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = FindNextComponent (NULL, &desc);
if (comp == NULL) {
return "cocoa_s: Failed to start CoreAudio: FindNextComponent returned NULL";
}
/* Open & initialize the default output audio unit */
if (OpenAComponent(comp, &_outputAudioUnit) != noErr) {
return "cocoa_s: Failed to start CoreAudio: OpenAComponent";
}
if (AudioUnitInitialize(_outputAudioUnit) != noErr) {
return "cocoa_s: Failed to start CoreAudio: AudioUnitInitialize";
}
/* Set the input format of the audio unit. */
if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &requestedDesc, sizeof(requestedDesc)) != noErr) {
return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)";
}
/* Set the audio callback */
callback.inputProc = audioCallback;
callback.inputProcRefCon = NULL;
if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
return "cocoa_s: Failed to start CoreAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)";
}
/* Finally, start processing of the audio unit */
if (AudioOutputUnitStart(_outputAudioUnit) != noErr) {
return "cocoa_s: Failed to start CoreAudio: AudioOutputUnitStart";
}
/* We're running! */
return NULL;
}
void SoundDriver_Cocoa::Stop()
{
struct AURenderCallbackStruct callback;
/* stop processing the audio unit */
if (AudioOutputUnitStop(_outputAudioUnit) != noErr) {
DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioOutputUnitStop failed");
return;
}
/* Remove the input callback */
callback.inputProc = 0;
callback.inputProcRefCon = 0;
if (AudioUnitSetProperty(_outputAudioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback)) != noErr) {
DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback) failed");
return;
}
if (CloseComponent(_outputAudioUnit) != noErr) {
DEBUG(driver, 0, "cocoa_s: Core_CloseAudio: CloseComponent failed");
return;
}
}
#endif /* WITH_COCOA */
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