bool PspAudio::open(uint32 freq, uint32 numOfChannels, uint32 numOfSamples, callbackFunc callback, void *userData) {
DEBUG_ENTER_FUNC();
if (_init) {
PSP_ERROR("audio device already initialized\n");
return true;
}
PSP_DEBUG_PRINT("freq[%d], numOfChannels[%d], numOfSamples[%d], callback[%p], userData[%x]\n",
freq, numOfChannels, numOfSamples, callback, (uint32)userData);
numOfSamples = PSP_AUDIO_SAMPLE_ALIGN(numOfSamples);
uint32 bufLen = numOfSamples * numOfChannels * NUM_BUFFERS * sizeof(uint16);
PSP_DEBUG_PRINT("total buffer size[%d]\n", bufLen);
_buffers[0] = (byte *)memalign(64, bufLen);
if (!_buffers[0]) {
PSP_ERROR("failed to allocate memory for audio buffers\n");
return false;
}
memset(_buffers[0], 0, bufLen); // clean the buffer
// Fill in the rest of the buffer pointers
byte *pBuffer = _buffers[0];
for (int i = 1; i < NUM_BUFFERS; i++) {
pBuffer += numOfSamples * numOfChannels * sizeof(uint16);
_buffers[i] = pBuffer;
}
// Reserve a HW channel for our audio
_pspChannel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, numOfSamples, numOfChannels == 2 ? PSP_AUDIO_FORMAT_STEREO : PSP_AUDIO_FORMAT_MONO);
if (_pspChannel < 0) {
PSP_ERROR("failed to reserve audio channel\n");
return false;
}
PSP_DEBUG_PRINT("reserved channel[%d] for audio\n", _pspChannel);
// Save our data
_numOfChannels = numOfChannels;
_numOfSamples = numOfSamples;
_bufferSize = numOfSamples * numOfChannels * sizeof(uint16); // should be the right size to send the app
_callback = callback;
_userData = userData;
_bufferToFill = 0;
_bufferToPlay = 0;
_init = true;
_paused = true; // start in paused mode
threadCreateAndStart("audioThread", PRIORITY_AUDIO_THREAD, STACK_AUDIO_THREAD); // start the consumer thread
return true;
}
void MasterGuRenderer::setupCallbackThread() {
DEBUG_ENTER_FUNC();
// start the thread that updates the display
threadCreateAndStart("DisplayCbThread", PRIORITY_DISPLAY_THREAD, STACK_DISPLAY_THREAD);
}
