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libtgvoip/os/darwin/AudioInputAudioUnitOSX.cpp

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//
// libtgvoip is free and unencumbered public domain software.
// For more information, see http://unlicense.org or the UNLICENSE file
// you should have received with this source code distribution.
//
#include <stdlib.h>
#include <stdio.h>
#include "AudioInputAudioUnitOSX.h"
#include "../../logging.h"
#include "../../audio/Resampler.h"
#include "../../VoIPController.h"
#define BUFFER_SIZE 960
#define CHECK_AU_ERROR(res, msg) if(res!=noErr){ LOGE("input: " msg": OSStatus=%d", (int)res); failed=true; return; }
#define kOutputBus 0
#define kInputBus 1
using namespace tgvoip;
using namespace tgvoip::audio;
AudioInputAudioUnit::AudioInputAudioUnit(std::string deviceID) : AudioInput(deviceID){
remainingDataSize=0;
isRecording=false;
OSStatus status;
AudioComponentDescription inputDesc={
.componentType = kAudioUnitType_Output, .componentSubType = kAudioUnitSubType_HALOutput, .componentFlags = 0, .componentFlagsMask = 0,
.componentManufacturer = kAudioUnitManufacturer_Apple
};
AudioComponent component=AudioComponentFindNext(NULL, &inputDesc);
status=AudioComponentInstanceNew(component, &unit);
CHECK_AU_ERROR(status, "Error creating AudioUnit");
UInt32 flag=0;
status = AudioUnitSetProperty(unit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, kOutputBus, &flag, sizeof(flag));
CHECK_AU_ERROR(status, "Error enabling AudioUnit output");
flag=1;
status = AudioUnitSetProperty(unit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, kInputBus, &flag, sizeof(flag));
CHECK_AU_ERROR(status, "Error enabling AudioUnit input");
SetCurrentDevice(deviceID);
CFRunLoopRef theRunLoop = NULL;
AudioObjectPropertyAddress propertyAddress = { kAudioHardwarePropertyRunLoop,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster };
status = AudioObjectSetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, sizeof(CFRunLoopRef), &theRunLoop);
propertyAddress.mSelector = kAudioHardwarePropertyDefaultInputDevice;
propertyAddress.mScope = kAudioObjectPropertyScopeGlobal;
propertyAddress.mElement = kAudioObjectPropertyElementMaster;
AudioObjectAddPropertyListener(kAudioObjectSystemObject, &propertyAddress, AudioInputAudioUnit::DefaultDeviceChangedCallback, this);
AURenderCallbackStruct callbackStruct;
callbackStruct.inputProc = AudioInputAudioUnit::BufferCallback;
callbackStruct.inputProcRefCon=this;
status = AudioUnitSetProperty(unit, kAudioOutputUnitProperty_SetInputCallback, kAudioUnitScope_Global, kInputBus, &callbackStruct, sizeof(callbackStruct));
CHECK_AU_ERROR(status, "Error setting input buffer callback");
status=AudioUnitInitialize(unit);
CHECK_AU_ERROR(status, "Error initializing unit");
inBufferList.mBuffers[0].mData=malloc(10240);
inBufferList.mBuffers[0].mDataByteSize=10240;
inBufferList.mNumberBuffers=1;
}
AudioInputAudioUnit::~AudioInputAudioUnit(){
AudioObjectPropertyAddress propertyAddress;
propertyAddress.mSelector = kAudioHardwarePropertyDefaultInputDevice;
propertyAddress.mScope = kAudioObjectPropertyScopeGlobal;
propertyAddress.mElement = kAudioObjectPropertyElementMaster;
AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &propertyAddress, AudioInputAudioUnit::DefaultDeviceChangedCallback, this);
AudioUnitUninitialize(unit);
AudioComponentInstanceDispose(unit);
free(inBufferList.mBuffers[0].mData);
}
void AudioInputAudioUnit::Configure(uint32_t sampleRate, uint32_t bitsPerSample, uint32_t channels){
}
void AudioInputAudioUnit::Start(){
isRecording=true;
OSStatus status=AudioOutputUnitStart(unit);
CHECK_AU_ERROR(status, "Error starting AudioUnit");
}
void AudioInputAudioUnit::Stop(){
isRecording=false;
OSStatus status=AudioOutputUnitStart(unit);
CHECK_AU_ERROR(status, "Error stopping AudioUnit");
}
OSStatus AudioInputAudioUnit::BufferCallback(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData){
AudioInputAudioUnit* input=(AudioInputAudioUnit*) inRefCon;
input->inBufferList.mBuffers[0].mDataByteSize=10240;
OSStatus res=AudioUnitRender(input->unit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, &input->inBufferList);
input->HandleBufferCallback(&input->inBufferList);
return noErr;
}
void AudioInputAudioUnit::HandleBufferCallback(AudioBufferList *ioData){
int i;
for(i=0;i<ioData->mNumberBuffers;i++){
AudioBuffer buf=ioData->mBuffers[i];
size_t len=buf.mDataByteSize;
if(hardwareSampleRate!=48000){
len=tgvoip::audio::Resampler::Convert((int16_t*)buf.mData, (int16_t*)(remainingData+remainingDataSize), buf.mDataByteSize/2, (10240-(buf.mDataByteSize+remainingDataSize))/2, 48000, hardwareSampleRate)*2;
}else{
assert(remainingDataSize+buf.mDataByteSize<10240);
memcpy(remainingData+remainingDataSize, buf.mData, buf.mDataByteSize);
}
remainingDataSize+=len;
while(remainingDataSize>=BUFFER_SIZE*2){
InvokeCallback((unsigned char*)remainingData, BUFFER_SIZE*2);
remainingDataSize-=BUFFER_SIZE*2;
if(remainingDataSize>0){
memmove(remainingData, remainingData+(BUFFER_SIZE*2), remainingDataSize);
}
}
}
}
void AudioInputAudioUnit::EnumerateDevices(std::vector<AudioInputDevice>& devs){
AudioObjectPropertyAddress propertyAddress = {
kAudioHardwarePropertyDevices,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
UInt32 dataSize = 0;
OSStatus status = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize);
if(kAudioHardwareNoError != status) {
LOGE("AudioObjectGetPropertyDataSize (kAudioHardwarePropertyDevices) failed: %i", status);
return;
}
UInt32 deviceCount = (UInt32)(dataSize / sizeof(AudioDeviceID));
AudioDeviceID *audioDevices = (AudioDeviceID*)(malloc(dataSize));
status = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize, audioDevices);
if(kAudioHardwareNoError != status) {
LOGE("AudioObjectGetPropertyData (kAudioHardwarePropertyDevices) failed: %i", status);
free(audioDevices);
audioDevices = NULL;
return;
}
// Iterate through all the devices and determine which are input-capable
propertyAddress.mScope = kAudioDevicePropertyScopeInput;
for(UInt32 i = 0; i < deviceCount; ++i) {
// Query device UID
CFStringRef deviceUID = NULL;
dataSize = sizeof(deviceUID);
propertyAddress.mSelector = kAudioDevicePropertyDeviceUID;
status = AudioObjectGetPropertyData(audioDevices[i], &propertyAddress, 0, NULL, &dataSize, &deviceUID);
if(kAudioHardwareNoError != status) {
LOGE("AudioObjectGetPropertyData (kAudioDevicePropertyDeviceUID) failed: %i", status);
continue;
}
// Query device name
CFStringRef deviceName = NULL;
dataSize = sizeof(deviceName);
propertyAddress.mSelector = kAudioDevicePropertyDeviceNameCFString;
status = AudioObjectGetPropertyData(audioDevices[i], &propertyAddress, 0, NULL, &dataSize, &deviceName);
if(kAudioHardwareNoError != status) {
LOGE("AudioObjectGetPropertyData (kAudioDevicePropertyDeviceNameCFString) failed: %i", status);
continue;
}
// Determine if the device is an input device (it is an input device if it has input channels)
dataSize = 0;
propertyAddress.mSelector = kAudioDevicePropertyStreamConfiguration;
status = AudioObjectGetPropertyDataSize(audioDevices[i], &propertyAddress, 0, NULL, &dataSize);
if(kAudioHardwareNoError != status) {
LOGE("AudioObjectGetPropertyDataSize (kAudioDevicePropertyStreamConfiguration) failed: %i", status);
continue;
}
AudioBufferList *bufferList = (AudioBufferList*)(malloc(dataSize));
status = AudioObjectGetPropertyData(audioDevices[i], &propertyAddress, 0, NULL, &dataSize, bufferList);
if(kAudioHardwareNoError != status || 0 == bufferList->mNumberBuffers) {
if(kAudioHardwareNoError != status)
LOGE("AudioObjectGetPropertyData (kAudioDevicePropertyStreamConfiguration) failed: %i", status);
free(bufferList);
bufferList = NULL;
continue;
}
free(bufferList);
bufferList = NULL;
AudioInputDevice dev;
char buf[1024];
CFStringGetCString(deviceName, buf, 1024, kCFStringEncodingUTF8);
dev.displayName=std::string(buf);
CFStringGetCString(deviceUID, buf, 1024, kCFStringEncodingUTF8);
dev.id=std::string(buf);
devs.push_back(dev);
}
free(audioDevices);
audioDevices = NULL;
}
void AudioInputAudioUnit::SetCurrentDevice(std::string deviceID){
UInt32 size=sizeof(AudioDeviceID);
AudioDeviceID inputDevice=NULL;
OSStatus status;
if(deviceID=="default"){
AudioObjectPropertyAddress propertyAddress;
propertyAddress.mSelector = kAudioHardwarePropertyDefaultInputDevice;
propertyAddress.mScope = kAudioObjectPropertyScopeGlobal;
propertyAddress.mElement = kAudioObjectPropertyElementMaster;
UInt32 propsize = sizeof(AudioDeviceID);
status = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &propsize, &inputDevice);
CHECK_AU_ERROR(status, "Error getting default input device");
}else{
AudioObjectPropertyAddress propertyAddress = {
kAudioHardwarePropertyDevices,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
UInt32 dataSize = 0;
status = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize);
CHECK_AU_ERROR(status, "Error getting devices size");
UInt32 deviceCount = (UInt32)(dataSize / sizeof(AudioDeviceID));
AudioDeviceID audioDevices[deviceCount];
status = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize, audioDevices);
CHECK_AU_ERROR(status, "Error getting device list");
for(UInt32 i = 0; i < deviceCount; ++i) {
// Query device UID
CFStringRef deviceUID = NULL;
dataSize = sizeof(deviceUID);
propertyAddress.mSelector = kAudioDevicePropertyDeviceUID;
status = AudioObjectGetPropertyData(audioDevices[i], &propertyAddress, 0, NULL, &dataSize, &deviceUID);
CHECK_AU_ERROR(status, "Error getting device uid");
char buf[1024];
CFStringGetCString(deviceUID, buf, 1024, kCFStringEncodingUTF8);
if(deviceID==buf){
LOGV("Found device for id %s", buf);
inputDevice=audioDevices[i];
break;
}
}
if(!inputDevice){
LOGW("Requested device not found, using default");
SetCurrentDevice("default");
return;
}
}
status =AudioUnitSetProperty(unit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
kInputBus,
&inputDevice,
size);
CHECK_AU_ERROR(status, "Error setting input device");
AudioStreamBasicDescription hardwareFormat;
size=sizeof(hardwareFormat);
status=AudioUnitGetProperty(unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, kInputBus, &hardwareFormat, &size);
CHECK_AU_ERROR(status, "Error getting hardware format");
hardwareSampleRate=hardwareFormat.mSampleRate;
AudioStreamBasicDescription desiredFormat={
.mSampleRate=hardwareFormat.mSampleRate, .mFormatID=kAudioFormatLinearPCM, .mFormatFlags=kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked | kAudioFormatFlagsNativeEndian,
.mFramesPerPacket=1, .mChannelsPerFrame=1, .mBitsPerChannel=16, .mBytesPerPacket=2, .mBytesPerFrame=2
};
status=AudioUnitSetProperty(unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, kInputBus, &desiredFormat, sizeof(desiredFormat));
CHECK_AU_ERROR(status, "Error setting format");
LOGD("Switched capture device, new sample rate %d", hardwareSampleRate);
this->currentDevice=deviceID;
AudioObjectPropertyAddress propertyAddress = {
kAudioDevicePropertyBufferFrameSize,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
size=4;
UInt32 bufferFrameSize;
status=AudioObjectGetPropertyData(inputDevice, &propertyAddress, 0, NULL, &size, &bufferFrameSize);
if(status==noErr){
estimatedDelay=bufferFrameSize/48;
LOGD("CoreAudio buffer size for output device is %u frames (%u ms)", bufferFrameSize, estimatedDelay);
}
}
OSStatus AudioInputAudioUnit::DefaultDeviceChangedCallback(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *inClientData){
LOGV("System default input device changed");
AudioInputAudioUnit* self=(AudioInputAudioUnit*)inClientData;
if(self->currentDevice=="default"){
self->SetCurrentDevice(self->currentDevice);
}
return noErr;
}