void AudioEngine::mixAudio(Uint8 *pDestBuffer, int destBufferLen)
{
int numFrames = destBufferLen/(2*getChannels()); // 16 bit samples.
if (m_AudioSources.size() == 0) {
return;
}
if (!m_pTempBuffer || m_pTempBuffer->getNumFrames() < numFrames) {
if (m_pTempBuffer) {
delete[] m_pMixBuffer;
}
m_pTempBuffer = AudioBufferPtr(new AudioBuffer(numFrames, m_AP));
m_pMixBuffer = new float[getChannels()*numFrames];
}
for (int i = 0; i < getChannels()*numFrames; ++i) {
m_pMixBuffer[i]=0;
}
{
lock_guard lock(m_Mutex);
AudioSourceMap::iterator it;
for (it = m_AudioSources.begin(); it != m_AudioSources.end(); it++) {
m_pTempBuffer->clear();
it->second->fillAudioBuffer(m_pTempBuffer);
addBuffers(m_pMixBuffer, m_pTempBuffer);
}
}
calcVolume(m_pMixBuffer, numFrames*getChannels(), getVolume());
for (int i = 0; i < numFrames; ++i) {
m_pLimiter->process(m_pMixBuffer+i*getChannels());
for (int j = 0; j < getChannels(); ++j) {
((short*)pDestBuffer)[i*2+j]=short(m_pMixBuffer[i*2+j]*32768);
}
}
}
int USBRequest::request(libusb_context* ctx, USBDevice *device, unsigned char endpoint, size_t request_bytes) {
std::cout << "Request start" << std::endl;
bytes = request_bytes;
mDevice = device;
err = 0;
done = 0;
ep = endpoint;
addBuffers();
while(!done) {
libusb_handle_events_completed(ctx, &done);
}
std::cout << "Remaining: " << bytes << std::endl;
if(err != 0) {
std::cout << "Erreur" << std::endl;
}
return err;
}
void USBRequest::receive(USBBuffer *buffer) {
std::unique_lock<std::mutex> lock(mMutex);
bytes += buffer->getLength();
if(buffer->getStatus() == LIBUSB_TRANSFER_COMPLETED) {
//std::cout << "Receive " << buffer->getActualLength() << std::endl;
bytes -= buffer->getActualLength();
/*int tt = buffer->getActualLength();
unsigned char * bb = buffer->getBuffer();
std::cout << *((unsigned short*)bb) << " " << (int)bb[tt-3] <<
" " << *((unsigned short*)(bb + tt - 2)) << std::endl; */
} else {
std::cout << "Error " << buffer->getStatus() << " with buffer 0x" << buffer << std::endl;
}
processing_buffers.remove(buffer);
idle_buffers.push_back(buffer);
addBuffers();
//mCond.notify_all();
}
