You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
529 lines
16 KiB
529 lines
16 KiB
![]()
4 years ago
|
//========= Copyright 1996-2009, Valve Corporation, All rights reserved. ============//
|
||
|
//
|
||
|
// Purpose:
|
||
|
//
|
||
|
// $NoKeywords: $
|
||
|
//
|
||
|
//=============================================================================//
|
||
|
// This module implements the voice record and compression functions
|
||
|
|
||
|
#include <Carbon/Carbon.h>
|
||
|
#include <AudioUnit/AudioUnit.h>
|
||
|
#include <AudioToolbox/AudioToolbox.h>
|
||
|
|
||
|
#include "tier0/platform.h"
|
||
|
#include "tier0/threadtools.h"
|
||
|
//#include "tier0/vcrmode.h"
|
||
|
#include "ivoicerecord.h"
|
||
|
|
||
|
|
||
|
#define kNumSecAudioBuffer 1.0f
|
||
|
|
||
|
// ------------------------------------------------------------------------------
|
||
|
// VoiceRecord_AudioQueue
|
||
|
// ------------------------------------------------------------------------------
|
||
|
|
||
|
class VoiceRecord_AudioQueue : public IVoiceRecord
|
||
|
{
|
||
|
public:
|
||
|
|
||
|
VoiceRecord_AudioQueue();
|
||
|
virtual ~VoiceRecord_AudioQueue();
|
||
|
|
||
|
// IVoiceRecord.
|
||
|
virtual void Release();
|
||
|
|
||
|
virtual bool RecordStart();
|
||
|
virtual void RecordStop();
|
||
|
|
||
|
// Initialize. The format of the data we expect from the provider is
|
||
|
// 8-bit signed mono at the specified sample rate.
|
||
|
virtual bool Init( int nSampleRate );
|
||
|
|
||
|
virtual void Idle();
|
||
|
|
||
|
// Get the most recent N samples.
|
||
|
virtual int GetRecordedData(short *pOut, int nSamplesWanted );
|
||
|
|
||
|
AudioUnit GetAudioUnit() { return m_AudioUnit; }
|
||
|
AudioConverterRef GetConverter() { return m_Converter; }
|
||
|
void RenderBuffer( const short *pszBuf, int nSamples );
|
||
|
bool BRecording() { return m_bRecordingAudio; }
|
||
|
void ClearThreadHandle() { m_hThread = NULL; m_bFirstInit = false; }
|
||
|
|
||
|
AudioBufferList m_MicInputBuffer;
|
||
|
AudioBufferList m_ConverterBuffer;
|
||
|
void *m_pMicInputBuffer;
|
||
|
|
||
|
int m_nMicInputSamplesAvaialble;
|
||
|
float m_flSampleRateConversion;
|
||
|
int m_nBufferFrameSize;
|
||
|
int m_ConverterBufferSize;
|
||
|
int m_MicInputBufferSize;
|
||
|
int m_InputBytesPerPacket;
|
||
|
|
||
|
private:
|
||
|
bool InitalizeInterfaces(); // Initialize the openal capture buffers and other interfaces
|
||
|
void ReleaseInterfaces(); // Release openal buffers and other interfaces
|
||
|
void ClearInterfaces(); // Clear members.
|
||
|
|
||
|
|
||
|
private:
|
||
|
AudioUnit m_AudioUnit;
|
||
|
char *m_SampleBuffer;
|
||
|
int m_SampleBufferSize;
|
||
|
int m_nSampleRate;
|
||
|
bool m_bRecordingAudio;
|
||
|
bool m_bFirstInit;
|
||
|
ThreadHandle_t m_hThread;
|
||
|
AudioConverterRef m_Converter;
|
||
|
|
||
|
CInterlockedUInt m_SampleBufferReadPos;
|
||
|
CInterlockedUInt m_SampleBufferWritePos;
|
||
|
|
||
|
//UInt32 nPackets = 0;
|
||
|
//bool bHaveListData = false;
|
||
|
|
||
|
|
||
|
};
|
||
|
|
||
|
|
||
|
VoiceRecord_AudioQueue::VoiceRecord_AudioQueue() :
|
||
|
m_nSampleRate( 0 ), m_AudioUnit( NULL ), m_SampleBufferSize(0), m_SampleBuffer(NULL),
|
||
|
m_SampleBufferReadPos(0), m_SampleBufferWritePos(0), m_bRecordingAudio(false), m_hThread( NULL ), m_bFirstInit( true )
|
||
|
{
|
||
|
ClearInterfaces();
|
||
|
}
|
||
|
|
||
|
|
||
|
VoiceRecord_AudioQueue::~VoiceRecord_AudioQueue()
|
||
|
{
|
||
|
ReleaseInterfaces();
|
||
|
if ( m_hThread )
|
||
|
ReleaseThreadHandle( m_hThread );
|
||
|
m_hThread = NULL;
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::Release()
|
||
|
{
|
||
|
ReleaseInterfaces();
|
||
|
}
|
||
|
|
||
|
uintp StartAudio( void *pRecorder )
|
||
|
{
|
||
|
VoiceRecord_AudioQueue *vr = (VoiceRecord_AudioQueue *)pRecorder;
|
||
|
if ( vr )
|
||
|
{
|
||
|
//printf( "AudioOutputUnitStart\n" );
|
||
|
AudioOutputUnitStart( vr->GetAudioUnit() );
|
||
|
vr->ClearThreadHandle();
|
||
|
}
|
||
|
//printf( "StartAudio thread done\n" );
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
bool VoiceRecord_AudioQueue::RecordStart()
|
||
|
{
|
||
|
if ( !m_AudioUnit )
|
||
|
return false;
|
||
|
|
||
|
if ( m_bFirstInit )
|
||
|
m_hThread = CreateSimpleThread( StartAudio, this );
|
||
|
else
|
||
|
AudioOutputUnitStart( m_AudioUnit );
|
||
|
|
||
|
m_SampleBufferReadPos = m_SampleBufferWritePos = 0;
|
||
|
|
||
|
m_bRecordingAudio = true;
|
||
|
//printf( "VoiceRecord_AudioQueue::RecordStart\n" );
|
||
|
return ( !m_bFirstInit || m_hThread != NULL );
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::RecordStop()
|
||
|
{
|
||
|
// Stop capturing.
|
||
|
if ( m_AudioUnit && m_bRecordingAudio )
|
||
|
{
|
||
|
AudioOutputUnitStop( m_AudioUnit );
|
||
|
//printf( "AudioOutputUnitStop\n" );
|
||
|
}
|
||
|
|
||
|
m_SampleBufferReadPos = m_SampleBufferWritePos = 0;
|
||
|
m_bRecordingAudio = false;
|
||
|
|
||
|
if ( m_hThread )
|
||
|
ReleaseThreadHandle( m_hThread );
|
||
|
m_hThread = NULL;
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
OSStatus ComplexBufferFillPlayback( AudioConverterRef inAudioConverter,
|
||
|
UInt32 *ioNumberDataPackets,
|
||
|
AudioBufferList *ioData,
|
||
|
AudioStreamPacketDescription **outDataPacketDesc,
|
||
|
void *inUserData)
|
||
|
{
|
||
|
VoiceRecord_AudioQueue *vr = (VoiceRecord_AudioQueue *)inUserData;
|
||
|
if ( !vr->BRecording() )
|
||
|
return noErr;
|
||
|
|
||
|
if ( vr->m_nMicInputSamplesAvaialble )
|
||
|
{
|
||
|
int nBytesRequired = *ioNumberDataPackets * vr->m_InputBytesPerPacket;
|
||
|
int nBytesAvailable = vr->m_nMicInputSamplesAvaialble*vr->m_InputBytesPerPacket;
|
||
|
|
||
|
if ( nBytesRequired < nBytesAvailable )
|
||
|
{
|
||
|
ioData->mBuffers[0].mData = vr->m_MicInputBuffer.mBuffers[0].mData;
|
||
|
ioData->mBuffers[0].mDataByteSize = nBytesRequired;
|
||
|
vr->m_MicInputBuffer.mBuffers[0].mData = (char *)vr->m_MicInputBuffer.mBuffers[0].mData+nBytesRequired;
|
||
|
vr->m_MicInputBuffer.mBuffers[0].mDataByteSize = nBytesAvailable - nBytesRequired;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
ioData->mBuffers[0].mData = vr->m_MicInputBuffer.mBuffers[0].mData;
|
||
|
ioData->mBuffers[0].mDataByteSize = nBytesAvailable;
|
||
|
vr->m_MicInputBuffer.mBuffers[0].mData = vr->m_pMicInputBuffer;
|
||
|
vr->m_MicInputBuffer.mBuffers[0].mDataByteSize = vr->m_MicInputBufferSize;
|
||
|
}
|
||
|
|
||
|
*ioNumberDataPackets = ioData->mBuffers[0].mDataByteSize / vr->m_InputBytesPerPacket;
|
||
|
vr->m_nMicInputSamplesAvaialble = nBytesAvailable / vr->m_InputBytesPerPacket - *ioNumberDataPackets;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
*ioNumberDataPackets = 0;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
return noErr;
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
static OSStatus recordingCallback(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp,
|
||
|
UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
|
||
|
{
|
||
|
VoiceRecord_AudioQueue *vr = (VoiceRecord_AudioQueue *)inRefCon;
|
||
|
if ( !vr->BRecording() )
|
||
|
return noErr;
|
||
|
|
||
|
OSStatus err = noErr;
|
||
|
if ( vr->m_nMicInputSamplesAvaialble == 0 )
|
||
|
{
|
||
|
err = AudioUnitRender( vr->GetAudioUnit(), ioActionFlags, inTimeStamp, 1, inNumberFrames, &vr->m_MicInputBuffer );
|
||
|
if ( err == noErr )
|
||
|
vr->m_nMicInputSamplesAvaialble = vr->m_MicInputBuffer.mBuffers[0].mDataByteSize / vr->m_InputBytesPerPacket;
|
||
|
}
|
||
|
|
||
|
if ( vr->m_nMicInputSamplesAvaialble > 0 )
|
||
|
{
|
||
|
UInt32 nConverterSamples = ceil(vr->m_nMicInputSamplesAvaialble/vr->m_flSampleRateConversion);
|
||
|
vr->m_ConverterBuffer.mBuffers[0].mDataByteSize = vr->m_ConverterBufferSize;
|
||
|
OSStatus err = AudioConverterFillComplexBuffer( vr->GetConverter(),
|
||
|
ComplexBufferFillPlayback,
|
||
|
vr,
|
||
|
&nConverterSamples,
|
||
|
&vr->m_ConverterBuffer,
|
||
|
NULL );
|
||
|
if ( err == noErr || err == -1 )
|
||
|
vr->RenderBuffer( (short *)vr->m_ConverterBuffer.mBuffers[0].mData, vr->m_ConverterBuffer.mBuffers[0].mDataByteSize/sizeof(short) );
|
||
|
}
|
||
|
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::RenderBuffer( const short *pszBuf, int nSamples )
|
||
|
{
|
||
|
int samplePos = m_SampleBufferWritePos;
|
||
|
int samplePosBefore = samplePos;
|
||
|
int readPos = m_SampleBufferReadPos;
|
||
|
bool bBeforeRead = false;
|
||
|
if ( samplePos < readPos )
|
||
|
bBeforeRead = true;
|
||
|
char *pOut = (char *)(m_SampleBuffer + samplePos);
|
||
|
int nFirstCopy = MIN( nSamples*sizeof(short), m_SampleBufferSize - samplePos );
|
||
|
memcpy( pOut, pszBuf, nFirstCopy );
|
||
|
samplePos += nFirstCopy;
|
||
|
if ( nSamples*sizeof(short) > nFirstCopy )
|
||
|
{
|
||
|
nSamples -= ( nFirstCopy / sizeof(short) );
|
||
|
samplePos = 0;
|
||
|
memcpy( m_SampleBuffer, pszBuf + nFirstCopy, nSamples * sizeof(short) );
|
||
|
samplePos += nSamples * sizeof(short);
|
||
|
}
|
||
|
|
||
|
m_SampleBufferWritePos = samplePos%m_SampleBufferSize;
|
||
|
if ( (bBeforeRead && samplePos > readPos) )
|
||
|
{
|
||
|
m_SampleBufferReadPos = (readPos+m_SampleBufferSize/2)%m_SampleBufferSize; // if we crossed the read pointer then bump it forward
|
||
|
//printf( "Crossed %d %d (%d)\n", (int)samplePosBefore, (int)samplePos, readPos );
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
bool VoiceRecord_AudioQueue::InitalizeInterfaces()
|
||
|
{
|
||
|
//printf( "Initializing audio queue recorder\n" );
|
||
|
// Describe audio component
|
||
|
ComponentDescription desc;
|
||
|
desc.componentType = kAudioUnitType_Output;
|
||
|
desc.componentSubType = kAudioUnitSubType_HALOutput;
|
||
|
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
|
||
|
desc.componentFlags = 0;
|
||
|
desc.componentFlagsMask = 0;
|
||
|
|
||
|
Component comp = FindNextComponent(NULL, &desc);
|
||
|
if (comp == NULL)
|
||
|
return false;
|
||
|
|
||
|
OSStatus status = OpenAComponent(comp, &m_AudioUnit);
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
// Enable IO for recording
|
||
|
UInt32 flag = 1;
|
||
|
status = AudioUnitSetProperty( m_AudioUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input,
|
||
|
1, &flag, sizeof(flag));
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
// disable output on the device
|
||
|
flag = 0;
|
||
|
status = AudioUnitSetProperty( m_AudioUnit,kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output,
|
||
|
0, &flag,sizeof(flag));
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
UInt32 size = sizeof(AudioDeviceID);
|
||
|
AudioDeviceID inputDevice;
|
||
|
status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultInputDevice,&size, &inputDevice);
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
status =AudioUnitSetProperty( m_AudioUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global,
|
||
|
0, &inputDevice, sizeof(inputDevice));
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
// Describe format
|
||
|
AudioStreamBasicDescription audioDeviceFormat;
|
||
|
size = sizeof(AudioStreamBasicDescription);
|
||
|
status = AudioUnitGetProperty( m_AudioUnit,
|
||
|
kAudioUnitProperty_StreamFormat,
|
||
|
kAudioUnitScope_Input,
|
||
|
1, // input bus
|
||
|
&audioDeviceFormat,
|
||
|
&size);
|
||
|
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
// we only want mono audio, so if they have a stero input ask for mono
|
||
|
if ( audioDeviceFormat.mChannelsPerFrame == 2 )
|
||
|
{
|
||
|
audioDeviceFormat.mChannelsPerFrame = 1;
|
||
|
audioDeviceFormat.mBytesPerPacket /= 2;
|
||
|
audioDeviceFormat.mBytesPerFrame /= 2;
|
||
|
}
|
||
|
|
||
|
// Apply format
|
||
|
status = AudioUnitSetProperty( m_AudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output,
|
||
|
1, &audioDeviceFormat, sizeof(audioDeviceFormat) );
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
AudioStreamBasicDescription audioOutputFormat;
|
||
|
audioOutputFormat = audioDeviceFormat;
|
||
|
audioOutputFormat.mFormatID = kAudioFormatLinearPCM;
|
||
|
audioOutputFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
|
||
|
audioOutputFormat.mBytesPerPacket = 2; // 16-bit samples * 1 channels
|
||
|
audioOutputFormat.mFramesPerPacket = 1;
|
||
|
audioOutputFormat.mBytesPerFrame = 2; // 16-bit samples * 1 channels
|
||
|
audioOutputFormat.mChannelsPerFrame = 1;
|
||
|
audioOutputFormat.mBitsPerChannel = 16;
|
||
|
audioOutputFormat.mReserved = 0;
|
||
|
|
||
|
audioOutputFormat.mSampleRate = m_nSampleRate;
|
||
|
|
||
|
m_flSampleRateConversion = audioDeviceFormat.mSampleRate / audioOutputFormat.mSampleRate;
|
||
|
|
||
|
// setup sample rate conversion
|
||
|
status = AudioConverterNew( &audioDeviceFormat, &audioOutputFormat, &m_Converter );
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
|
||
|
UInt32 primeMethod = kConverterPrimeMethod_None;
|
||
|
status = AudioConverterSetProperty( m_Converter, kAudioConverterPrimeMethod, sizeof(UInt32), &primeMethod);
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
UInt32 quality = kAudioConverterQuality_Medium;
|
||
|
status = AudioConverterSetProperty( m_Converter, kAudioConverterSampleRateConverterQuality, sizeof(UInt32), &quality);
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
// Set input callback
|
||
|
AURenderCallbackStruct callbackStruct;
|
||
|
callbackStruct.inputProc = recordingCallback;
|
||
|
callbackStruct.inputProcRefCon = this;
|
||
|
status = AudioUnitSetProperty( m_AudioUnit, kAudioOutputUnitProperty_SetInputCallback, kAudioUnitScope_Global,
|
||
|
0, &callbackStruct, sizeof(callbackStruct) );
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
UInt32 bufferFrameSize;
|
||
|
size = sizeof(bufferFrameSize);
|
||
|
status = AudioDeviceGetProperty( inputDevice, 1, 1, kAudioDevicePropertyBufferFrameSize, &size, &bufferFrameSize );
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
m_nBufferFrameSize = bufferFrameSize;
|
||
|
|
||
|
// allocate the input and conversion sound storage buffers
|
||
|
m_MicInputBuffer.mNumberBuffers = 1;
|
||
|
m_MicInputBuffer.mBuffers[0].mDataByteSize = m_nBufferFrameSize*audioDeviceFormat.mBitsPerChannel/8*audioDeviceFormat.mChannelsPerFrame;
|
||
|
m_MicInputBuffer.mBuffers[0].mData = malloc( m_MicInputBuffer.mBuffers[0].mDataByteSize );
|
||
|
m_MicInputBuffer.mBuffers[0].mNumberChannels = audioDeviceFormat.mChannelsPerFrame;
|
||
|
m_pMicInputBuffer = m_MicInputBuffer.mBuffers[0].mData;
|
||
|
m_MicInputBufferSize = m_MicInputBuffer.mBuffers[0].mDataByteSize;
|
||
|
|
||
|
m_InputBytesPerPacket = audioDeviceFormat.mBytesPerPacket;
|
||
|
|
||
|
m_ConverterBuffer.mNumberBuffers = 1;
|
||
|
m_ConverterBuffer.mBuffers[0].mDataByteSize = m_nBufferFrameSize*audioOutputFormat.mBitsPerChannel/8*audioOutputFormat.mChannelsPerFrame;
|
||
|
m_ConverterBuffer.mBuffers[0].mData = malloc( m_MicInputBuffer.mBuffers[0].mDataByteSize );
|
||
|
m_ConverterBuffer.mBuffers[0].mNumberChannels = 1;
|
||
|
|
||
|
m_ConverterBufferSize = m_ConverterBuffer.mBuffers[0].mDataByteSize;
|
||
|
|
||
|
m_nMicInputSamplesAvaialble = 0;
|
||
|
|
||
|
|
||
|
m_SampleBufferReadPos = m_SampleBufferWritePos = 0;
|
||
|
m_SampleBufferSize = ceil( kNumSecAudioBuffer * m_nSampleRate * audioOutputFormat.mBytesPerPacket );
|
||
|
m_SampleBuffer = (char *)malloc( m_SampleBufferSize );
|
||
|
memset( m_SampleBuffer, 0x0, m_SampleBufferSize );
|
||
|
|
||
|
DevMsg( "Initialized AudioQueue record interface\n" );
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
bool VoiceRecord_AudioQueue::Init( int nSampleRate )
|
||
|
{
|
||
|
if ( m_AudioUnit && m_nSampleRate != nSampleRate )
|
||
|
{
|
||
|
// Need to recreate interfaces with different sample rate
|
||
|
ReleaseInterfaces();
|
||
|
ClearInterfaces();
|
||
|
}
|
||
|
m_nSampleRate = nSampleRate;
|
||
|
|
||
|
// Re-initialize the capture buffer if neccesary
|
||
|
if ( !m_AudioUnit )
|
||
|
{
|
||
|
InitalizeInterfaces();
|
||
|
}
|
||
|
|
||
|
m_SampleBufferReadPos = m_SampleBufferWritePos = 0;
|
||
|
|
||
|
//printf( "VoiceRecord_AudioQueue::Init()\n" );
|
||
|
// Initialise
|
||
|
OSStatus status = AudioUnitInitialize( m_AudioUnit );
|
||
|
if ( status != noErr )
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::ReleaseInterfaces()
|
||
|
{
|
||
|
AudioOutputUnitStop( m_AudioUnit );
|
||
|
AudioConverterDispose( m_Converter );
|
||
|
AudioUnitUninitialize( m_AudioUnit );
|
||
|
m_AudioUnit = NULL;
|
||
|
m_Converter = NULL;
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::ClearInterfaces()
|
||
|
{
|
||
|
m_AudioUnit = NULL;
|
||
|
m_Converter = NULL;
|
||
|
m_SampleBufferReadPos = m_SampleBufferWritePos = 0;
|
||
|
if ( m_SampleBuffer )
|
||
|
free( m_SampleBuffer );
|
||
|
m_SampleBuffer = NULL;
|
||
|
|
||
|
if ( m_MicInputBuffer.mBuffers[0].mData )
|
||
|
free( m_MicInputBuffer.mBuffers[0].mData );
|
||
|
if ( m_ConverterBuffer.mBuffers[0].mData )
|
||
|
free( m_ConverterBuffer.mBuffers[0].mData );
|
||
|
m_MicInputBuffer.mBuffers[0].mData = NULL;
|
||
|
m_ConverterBuffer.mBuffers[0].mData = NULL;
|
||
|
}
|
||
|
|
||
|
|
||
|
void VoiceRecord_AudioQueue::Idle()
|
||
|
{
|
||
|
}
|
||
|
|
||
|
|
||
|
int VoiceRecord_AudioQueue::GetRecordedData(short *pOut, int nSamples )
|
||
|
{
|
||
|
if ( !m_SampleBuffer )
|
||
|
return 0;
|
||
|
|
||
|
int cbSamples = nSamples*2; // convert to bytes
|
||
|
int writePos = m_SampleBufferWritePos;
|
||
|
int readPos = m_SampleBufferReadPos;
|
||
|
|
||
|
int nOutstandingSamples = ( writePos - readPos );
|
||
|
if ( readPos > writePos ) // writing has wrapped around
|
||
|
{
|
||
|
nOutstandingSamples = writePos + ( m_SampleBufferSize - readPos );
|
||
|
}
|
||
|
|
||
|
if ( !nOutstandingSamples )
|
||
|
return 0;
|
||
|
|
||
|
if ( nOutstandingSamples < cbSamples )
|
||
|
cbSamples = nOutstandingSamples; // clamp to the number of samples we have available
|
||
|
|
||
|
memcpy( (char *)pOut, m_SampleBuffer + readPos, MIN( cbSamples, m_SampleBufferSize - readPos ) );
|
||
|
if ( cbSamples > ( m_SampleBufferSize - readPos ) )
|
||
|
{
|
||
|
int offset = m_SampleBufferSize - readPos;
|
||
|
cbSamples -= offset;
|
||
|
readPos = 0;
|
||
|
memcpy( (char *)pOut + offset, m_SampleBuffer, cbSamples );
|
||
|
}
|
||
|
readPos+=cbSamples;
|
||
|
m_SampleBufferReadPos = readPos%m_SampleBufferSize;
|
||
|
//printf( "Returning %d samples, %d %d (%d)\n", cbSamples/2, (int)m_SampleBufferReadPos, (int)m_SampleBufferWritePos, m_SampleBufferSize );
|
||
|
return cbSamples/2;
|
||
|
}
|
||
|
|
||
|
|
||
|
VoiceRecord_AudioQueue g_AudioQueueVoiceRecord;
|
||
|
IVoiceRecord* CreateVoiceRecord_AudioQueue( int sampleRate )
|
||
|
{
|
||
|
if ( g_AudioQueueVoiceRecord.Init( sampleRate ) )
|
||
|
{
|
||
|
return &g_AudioQueueVoiceRecord;
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
g_AudioQueueVoiceRecord.Release();
|
||
|
return NULL;
|
||
|
}
|
||
|
}
|