AudioDestinationIOS.cpp [plain text]
#include "config.h"
#if ENABLE(WEB_AUDIO) && PLATFORM(IOS_FAMILY)
#include "AudioDestinationCocoa.h"
#include "AudioSession.h"
#include <wtf/SoftLinking.h>
SOFT_LINK_FRAMEWORK(AudioToolbox)
SOFT_LINK(AudioToolbox, AudioComponentFindNext, AudioComponent, (AudioComponent inComponent, const AudioComponentDescription *inDesc), (inComponent, inDesc))
SOFT_LINK(AudioToolbox, AudioComponentInstanceNew, OSStatus, (AudioComponent inComponent, AudioComponentInstance *outInstance), (inComponent, outInstance))
SOFT_LINK(AudioToolbox, AudioUnitAddPropertyListener, OSStatus, (AudioUnit inUnit, AudioUnitPropertyID inID, AudioUnitPropertyListenerProc inProc, void *inProcUserData), (inUnit, inID, inProc, inProcUserData))
SOFT_LINK(AudioToolbox, AudioUnitGetProperty, OSStatus, (AudioUnit inUnit, AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void *outData, UInt32 *ioDataSize), (inUnit, inID, inScope, inElement, outData, ioDataSize))
SOFT_LINK(AudioToolbox, AudioUnitInitialize, OSStatus, (AudioUnit inUnit), (inUnit))
SOFT_LINK(AudioToolbox, AudioUnitSetProperty, OSStatus, (AudioUnit inUnit, AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, const void *inData, UInt32 inDataSize), (inUnit, inID, inScope, inElement, inData, inDataSize))
namespace WebCore {
void AudioDestinationCocoa::configure()
{
const int kPreferredBufferSize = 256;
AudioComponent comp;
AudioComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_RemoteIO;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = AudioComponentFindNext(0, &desc);
ASSERT(comp);
OSStatus result = AudioComponentInstanceNew(comp, &outputUnit());
ASSERT(!result);
UInt32 flag = 1;
result = AudioUnitSetProperty(outputUnit(),
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output,
0,
&flag,
sizeof(flag));
ASSERT(!result);
result = AudioUnitInitialize(outputUnit());
ASSERT(!result);
AURenderCallbackStruct input;
input.inputProc = inputProc;
input.inputProcRefCon = this;
result = AudioUnitSetProperty(outputUnit(), kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &input, sizeof(input));
ASSERT(!result);
AudioStreamBasicDescription streamFormat;
UInt32 size = sizeof(AudioStreamBasicDescription);
result = AudioUnitGetProperty(outputUnit(), kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, (void*)&streamFormat, &size);
ASSERT(!result);
setAudioStreamBasicDescription(streamFormat, sampleRate());
result = AudioUnitSetProperty(outputUnit(), kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, (void*)&streamFormat, sizeof(AudioStreamBasicDescription));
ASSERT(!result);
AudioSession::sharedSession().setPreferredBufferSize(kPreferredBufferSize);
}
void AudioDestinationCocoa::processBusAfterRender(AudioBus&, UInt32)
{
}
}
#endif // ENABLE(WEB_AUDIO) && PLATFORM(IOS_FAMILY)