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#include <algorithm>
#include <string>
#include <stdio.h>
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
#include <CoreAudio/CoreAudio.h>
#include <CoreServices/CoreServices.h>
#endif
#include "device_coreaudio.h"
#include "debug.h"
#define kOutputBus 0
#define kInputBus 1
namespace audiere {
CAAudioDevice*
CAAudioDevice::create(const ParameterList& parameters) {
OSStatus result = noErr;
AudioStreamBasicDescription desc;
// Setup a AudioStreamBasicDescription with the requested format
memset(&desc, 0, sizeof(desc));
desc.mFormatID = kAudioFormatLinearPCM;
desc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
desc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
desc.mSampleRate = 44100;
desc.mChannelsPerFrame = 2;
desc.mBitsPerChannel = 16;
desc.mFramesPerPacket = 1;
desc.mBytesPerFrame = desc.mBitsPerChannel * desc.mChannelsPerFrame / 8;
desc.mBytesPerPacket = desc.mBytesPerFrame * desc.mFramesPerPacket;
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
// Locate the default output audio unit
AudioDeviceID devid = 0;
UInt32 size = 0;
UInt32 alive = 0;
pid_t pid = 0;
size = sizeof(AudioDeviceID);
const AudioHardwarePropertyID propid = kAudioHardwarePropertyDefaultOutputDevice;
result = AudioHardwareGetProperty(propid, &size, &devid);
if (result != noErr)
return 0;
size = sizeof(alive);
result = AudioDeviceGetProperty(devid, 0, false,
kAudioDevicePropertyDeviceIsAlive,
&size, &alive);
if (result != noErr) {
ADR_LOG("CoreAudio: requested device exists, but isn't alive.");
return 0;
}
size = sizeof(pid);
result = AudioDeviceGetProperty(devid, 0, false,
kAudioDevicePropertyHogMode, &size, &pid);
/* some devices don't support this property, so errors are fine here. */
if ((result == noErr) && (pid != -1)) {
ADR_LOG("CoreAudio: requested device is being hogged.");
return 0;
}
#endif
AudioUnit unit;
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
Component comp;
ComponentDescription compDesc;
memset(&compDesc, 0, sizeof(ComponentDescription));
compDesc.componentType = kAudioUnitType_Output;
compDesc.componentSubType = kAudioUnitSubType_DefaultOutput;
compDesc.componentManufacturer = kAudioUnitManufacturer_Apple;
comp = FindNextComponent(NULL, &compDesc);
if (!comp) {
ADR_LOG("CoreAudio: Couldn't find requested CoreAudio component.");
return 0;
}
/* Open & initialize the audio unit */
result = OpenAComponent(comp, &unit);
if (result != noErr) {
ADR_LOG("CoreAudio: Couldn't open a audio unit.\n");
return 0;
}
result = AudioUnitSetProperty(unit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0,
&devid,
sizeof(AudioDeviceID));
if (result != noErr) {
ADR_LOG ("CoreAudio: Couldn't set current device.");
CloseComponent(unit);
return 0;
}
#else
AudioComponent comp;
AudioComponentDescription compDesc;
memset(&compDesc, 0, sizeof(AudioComponentDescription));
compDesc.componentType = kAudioUnitType_Output;
compDesc.componentSubType = kAudioUnitSubType_RemoteIO;
compDesc.componentManufacturer = kAudioUnitManufacturer_Apple;
comp = AudioComponentFindNext(NULL, &compDesc);
if (!comp) {
ADR_LOG("CoreAudio: Couldn't find requested CoreAudio component");
return 0;
}
/* Open & initialize the audio unit */
result = AudioComponentInstanceNew(comp, &unit);
if (result != noErr) {
ADR_LOG("CoreAudio: Couldn't open a audio unit.\n");
return 0;
}
UInt32 enableIO = 0;
result = AudioUnitSetProperty(unit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Input, kInputBus,
&enableIO, sizeof(enableIO));
if (result != noErr) {
ADR_LOG("CoreAudio: Couldn't disable input for the audio unit.\n");
return 0;
}
enableIO = 1;
result = AudioUnitSetProperty(unit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output, kOutputBus,
&enableIO, sizeof(enableIO));
if (result != noErr) {
ADR_LOG("CoreAudio: Couldn't enable output for the audio unit.\n");
return 0;
}
#endif
// Set the input format of the audio unit.
result = AudioUnitSetProperty(unit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
kOutputBus,
&desc,
sizeof(desc));
if (result != noErr) {
ADR_LOG ("CoreAudio: Couldn't to set stream format.");
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
CloseComponent(unit);
#endif
return 0;
}
result = AudioUnitInitialize(unit);
if (result != noErr) {
ADR_LOG ("CoreAudio: Couldn't initialize the audio unit.");
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
CloseComponent(unit);
#endif
return 0;
}
return new CAAudioDevice(unit);
}
CAAudioDevice::CAAudioDevice(AudioUnit audio_unit)
: MixerDevice(44100),
m_unit (audio_unit)
{
OSStatus result;
// Set the audio callback
struct AURenderCallbackStruct callback;
memset(&callback, 0, sizeof(AURenderCallbackStruct));
callback.inputProc = fillInput;
callback.inputProcRefCon = this;
result = AudioUnitSetProperty(m_unit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, kOutputBus,
&callback, sizeof(callback));
if (result != noErr)
ADR_LOG("CoreAudio: Couldn't set render callback.\n");
result = AudioOutputUnitStart(m_unit);
if (result != noErr)
ADR_LOG("CoreAudio: Couldn't start the audio unit.\n");
}
CAAudioDevice::~CAAudioDevice() {
ADR_GUARD("CAAudioDevice::~CAAudioDevice");
OSStatus result;
struct AURenderCallbackStruct callback;
result = AudioOutputUnitStop(m_unit);
memset(&callback, 0, sizeof(AURenderCallbackStruct));
result = AudioUnitSetProperty(m_unit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, kOutputBus,
&callback, sizeof(callback));
#ifndef __IPHONE_OS_VERSION_MIN_REQUIRED
result = CloseComponent(m_unit);
#else
result = AudioUnitUninitialize(m_unit);
#endif
}
void CAAudioDevice::pause() {
ADR_GUARD("CAAudioDevice::~CAAudioDevice");
AudioOutputUnitStop(m_unit);
}
void CAAudioDevice::resume() {
ADR_GUARD("CAAudioDevice::~CAAudioDevice");
AudioOutputUnitStart(m_unit);
}
OSStatus CAAudioDevice::fillInput(void *inRefCon,
AudioUnitRenderActionFlags * ioActionFlags,
const AudioTimeStamp * inTimeStamp,
UInt32 inBusNumber, UInt32 inNumberFrames,
AudioBufferList * ioData) {
CAAudioDevice* device = static_cast<CAAudioDevice*>(inRefCon);
ADR_LOG("fillInput\n");
for (UInt32 i = 0; i < ioData->mNumberBuffers; i++) {
AudioBuffer *abuf;
UInt32 remaining, len;
void* ptr;
abuf = &ioData->mBuffers[i];
remaining = abuf->mDataByteSize;
ptr = abuf->mData;
while (remaining > 0) {
if (device) {
len = device->read(remaining / 4, ptr);
} else {
len = remaining / 4;
memset(ptr, 0, remaining);
}
ptr = (char *)ptr + len;
remaining -= len * 4;
}
}
return noErr;
}
void ADR_CALL
CAAudioDevice::update() {
AI_Sleep (20);
}
const char* ADR_CALL
CAAudioDevice::getName() {
return "coreaudio";
}
}
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