short
FIR::DoProcess(){
if(!m_error){
if(m_input){
float out;
int i;
for(m_vecpos=0; m_vecpos < m_vecsize;m_vecpos++){
if(m_enable){
PutSample(m_input->Output(m_vecpos));
// wpointer is already incremented, so that the
// current sample is at wpointer - 1
// and oldest sample at wpointer - m_size
for(i=1,out=0.f; i <= m_size; i++){
m_rpointer = m_wpointer - i;
out += GetSample(m_rpointer)*m_table->Lookup(i);
}
m_output[m_vecpos] = out;
}
else m_output[m_vecpos] = 0.f;
}
return 1;
}
else {
m_error = 11;
return 0;
}
}
else return 0;
}
HRESULT CTimeStretchFilter::EndOfStream()
{
// Queue an EOS marker so that it gets processed in
// the same thread as the audio data.
PutSample(NULL);
// wait until input queue is empty
//if(m_hInputQueueEmptyEvent)
// WaitForSingleObject(m_hInputQueueEmptyEvent, END_OF_STREAM_FLUSH_TIMEOUT); // TODO make this depend on the amount of data in the queue
return S_OK;
}
STDMETHODIMP CDecodeThread::Decode(IMediaSample *pSample)
{
CAutoLock decoderLock(this);
if (!CAMThread::ThreadExists() || !m_pDecoder)
return E_UNEXPECTED;
// Wait until the queue is empty
while(HasSample())
Sleep(1);
// Re-init the decoder, if requested
// Doing this inside the worker thread alone causes problems
// when switching from non-sync to sync, so ensure we're in sync.
if (m_bDecoderNeedsReInit) {
CAMThread::CallWorker(CMD_REINIT);
while (!m_evEOSDone.Check()) {
m_evSample.Wait();
ProcessOutput();
}
}
m_evDeliver.Reset();
m_evSample.Reset();
m_evDecodeDone.Reset();
pSample->AddRef();
// Send data to worker thread, and wake it (if it was waiting)
PutSample(pSample);
// If we don't have thread safe buffers, we need to synchronize
// with the worker thread and deliver them when they are available
// and then let it know that we did so
if (m_bSyncToProcess) {
while (!m_evDecodeDone.Check()) {
m_evSample.Wait();
ProcessOutput();
}
}
ProcessOutput();
return S_OK;
}
short
Pitch::DoProcess(){
if(!m_error){
if(m_input){
float s1, s3;
float absdiff;
int halfsize;
for(m_vecpos=0; m_vecpos<m_vecsize;m_vecpos++){
if(m_enable){
halfsize = m_size/2;
absdiff = (float) (int) m_pointer1 - m_wpointer;
absdiff = absdiff > 0 ? absdiff : -absdiff;
if(absdiff > halfsize){
if(m_pointer1 > m_wpointer) absdiff = m_wpointer+m_size - m_pointer1;
else absdiff = m_pointer1+m_size - m_wpointer;
}
absdiff = absdiff/halfsize;
s1 = GetSample(m_pointer1);
s3 = GetSample(m_pointer3);
PutSample(m_input->Output(m_vecpos));
m_output[m_vecpos] = absdiff*s1+ (1.f - absdiff)*s3;
m_incr += m_pitch;
while(m_incr >= m_size) m_incr -= m_size;
m_pointer1 = m_incr;
m_pointer3 = m_pointer1+m_size/2;
while(m_pointer3 >= m_size) m_pointer3 -= m_size;
}
else m_output[m_vecpos] = 0.f;
}
return 1;
}
else{
m_error = 11;
return 0;
}
}
else return 0;
}
short
DelayLine::DoProcess(){
if(!m_error){
if(m_input){
for(m_vecpos=0; m_vecpos < m_vecsize;m_vecpos++){
if(m_enable){
m_output[m_vecpos] = GetSample();
PutSample(m_input->Output(m_vecpos));
}
else m_output[m_vecpos] = 0.f;
}
return 1;
}
else {
m_error = 11;
return 0;
}
}
else return 0;
}
void
DelayLine::Reset(){
for(int n = 0; n < m_size; n++)
PutSample(0.f);
}