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initial work for setting sample rate in client

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This commit is contained in:
Volker Fischer 2009-07-04 06:55:46 +00:00
parent c9e70f5cb0
commit 181a8142a8
4 changed files with 31 additions and 19 deletions
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28
src/client.cpp
View file

@ -37,6 +37,7 @@ CClient::CClient ( const quint16 iPortNumber ) :
bOpenChatOnNewMessage ( true ),
bDoAutoSockBufSize ( true ),
iSndCrdPreferredMonoBlSizeIndex ( CSndCrdBufferSizes::GetDefaultIndex() ),
iClientSampleRate ( SYSTEM_SAMPLE_RATE ),
iSndCrdMonoBlockSizeSam ( 0 )
{
// connection for protocol
@ -163,7 +164,7 @@ void CClient::SetSndCrdPreferredMonoBlSizeIndex ( const int iNewIdx )
}
// init with new block size index parameter
Init ( iSndCrdPreferredMonoBlSizeIndex );
Init ( iClientSampleRate, iSndCrdPreferredMonoBlSizeIndex );
if ( bWasRunning )
{
@ -190,7 +191,7 @@ QString CClient::SetSndCrdDev ( const int iNewDev )
// init again because the sound card actual buffer size might
// be changed on new device
Init ( iSndCrdPreferredMonoBlSizeIndex );
Init ( iClientSampleRate, iSndCrdPreferredMonoBlSizeIndex );
if ( bWasRunning )
{
@ -213,7 +214,7 @@ void CClient::OnSndCrdReinitRequest()
// reinit the driver (we use the currently selected driver) and
// init client object, too
Sound.SetDev ( Sound.GetDev() );
Init ( iSndCrdPreferredMonoBlSizeIndex );
Init ( iClientSampleRate, iSndCrdPreferredMonoBlSizeIndex );
if ( bWasRunning )
{
@ -224,7 +225,7 @@ void CClient::OnSndCrdReinitRequest()
void CClient::Start()
{
// init object
Init ( iSndCrdPreferredMonoBlSizeIndex );
Init ( iClientSampleRate, iSndCrdPreferredMonoBlSizeIndex );
// enable channel
Channel.SetEnable ( true );
@ -262,8 +263,12 @@ void CClient::AudioCallback ( CVector<short>& psData, void* arg )
pMyClientObj->ProcessAudioData ( psData );
}
void CClient::Init ( const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate )
void CClient::Init ( const int iSampleRate,
const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate )
{
// store new sample rate
iClientSampleRate = iSampleRate;
// translate block size index in actual block size
const int iPrefMonoBlockSizeSamAtSndCrdSamRate = CSndCrdBufferSizes::
GetBufferSizeFromIndex ( iPrefMonoBlockSizeSamIndexAtSndCrdSamRate );
@ -272,7 +277,7 @@ void CClient::Init ( const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate )
iSndCrdMonoBlockSizeSam = Sound.Init ( iPrefMonoBlockSizeSamAtSndCrdSamRate );
iSndCrdStereoBlockSizeSam = 2 * iSndCrdMonoBlockSizeSam;
iMonoBlockSizeSam = iSndCrdMonoBlockSizeSam * SYSTEM_SAMPLE_RATE / SND_CRD_SAMPLE_RATE;
iMonoBlockSizeSam = iSndCrdMonoBlockSizeSam * iClientSampleRate / SND_CRD_SAMPLE_RATE;
iStereoBlockSizeSam = 2 * iMonoBlockSizeSam;
// the channel works on the same block size as the sound interface
@ -286,10 +291,12 @@ void CClient::Init ( const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate )
// resample objects are always initialized with the input block size
// record
ResampleObjDown.Init ( iSndCrdMonoBlockSizeSam, SND_CRD_SAMPLE_RATE, SYSTEM_SAMPLE_RATE );
ResampleObjDown.Init ( iSndCrdMonoBlockSizeSam,
SND_CRD_SAMPLE_RATE, iClientSampleRate );
// playback
ResampleObjUp.Init ( iMonoBlockSizeSam, SYSTEM_SAMPLE_RATE, SND_CRD_SAMPLE_RATE );
ResampleObjUp.Init ( iMonoBlockSizeSam,
iClientSampleRate, SND_CRD_SAMPLE_RATE );
// init network buffers
vecsNetwork.Init ( iMonoBlockSizeSam );
@ -300,7 +307,8 @@ void CClient::Init ( const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate )
CycleTimeVariance.Reset();
AudioReverb.Clear();
// init reverberation
AudioReverb.Init ( iClientSampleRate );
}
void CClient::ProcessAudioData ( CVector<short>& vecsStereoSndCrd )
@ -463,7 +471,7 @@ void CClient::UpdateSocketBufferSize()
// a minimum buffer size of the sum of both sizes
const double dAudioBufferDurationMs =
( iMonoBlockSizeSam + Channel.GetAudioBlockSizeIn() ) * 1000 /
SYSTEM_SAMPLE_RATE;
iClientSampleRate;
// accumulate the standard deviations of input network stream and
// internal timer,

4
src/client.h
View file

@ -160,7 +160,8 @@ protected:
// callback function must be static, otherwise it does not work
static void AudioCallback ( CVector<short>& psData, void* arg );
void Init ( const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate );
void Init ( const int iSampleRate,
const int iPrefMonoBlockSizeSamIndexAtSndCrdSamRate );
void ProcessAudioData ( CVector<short>& vecsStereoSndCrd );
void UpdateSocketBufferSize();
@ -180,6 +181,7 @@ protected:
CAudioReverb AudioReverb;
int iSndCrdPreferredMonoBlSizeIndex;
int iClientSampleRate;
int iSndCrdMonoBlockSizeSam;
int iSndCrdStereoBlockSizeSam;

11
src/util.cpp
View file

@ -166,13 +166,13 @@ uint32_t CCRC::GetCRC()
three series allpass units, followed by four parallel comb filters, and two
decorrelation delay lines in parallel at the output.
*/
CAudioReverb::CAudioReverb ( const double rT60 )
void CAudioReverb::Init ( const int iSampleRate, const double rT60 )
{
int delay, i;
// delay lengths for 44100 Hz sample rate
int lengths[9] = { 1777, 1847, 1993, 2137, 389, 127, 43, 211, 179 };
const double scaler = (double) SYSTEM_SAMPLE_RATE / 44100.0;
const double scaler = (double) iSampleRate / 44100.0;
if ( scaler != 1.0 )
{
@ -204,7 +204,7 @@ CAudioReverb::CAudioReverb ( const double rT60 )
combDelays_[i].Init ( lengths[i] );
}
setT60 ( rT60 );
setT60 ( rT60, iSampleRate );
allpassCoefficient_ = (double) 0.7;
Clear();
}
@ -250,13 +250,14 @@ void CAudioReverb::Clear()
combDelays_[3].Reset ( 0 );
}
void CAudioReverb::setT60 ( const double rT60 )
void CAudioReverb::setT60 ( const double rT60,
const int iSampleRate )
{
// set the reverberation T60 decay time
for ( int i = 0; i < 4; i++ )
{
combCoefficient_[i] = pow ( (double) 10.0, (double) ( -3.0 *
combDelays_[i].Size() / ( rT60 * SYSTEM_SAMPLE_RATE ) ) );
combDelays_[i].Size() / ( rT60 * iSampleRate ) ) );
}
}

7
src/util.h
View file

@ -473,13 +473,14 @@ public:
class CAudioReverb
{
public:
CAudioReverb ( const double rT60 = (double) 5.0 );
CAudioReverb() {}
void Init ( const int iSampleRate, const double rT60 = (double) 5.0 );
void Clear();
double ProcessSample ( const double input );
protected:
void setT60 ( const double rT60 );
void setT60 ( const double rT60, const int iSampleRate );
bool isPrime ( const int number );
CFIFO<int> allpassDelays_[3];