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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <pspthreadman.h>
#include <pspaudio.h>
#include "common/scummsys.h"
#include "backends/platform/psp/audio.h"
//#define __PSP_DEBUG_FUNCS__ /* For debugging function calls */
//#define __PSP_DEBUG_PRINT__ /* For debug printouts */
#include "backends/platform/psp/trace.h"
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;
}
// The real thread function
void PspAudio::threadFunction() {
assert(_callback);
PSP_DEBUG_PRINT_FUNC("audio thread started\n");
while (_init) { // Keep looping so long as we haven't been told to stop
if (_paused)
PSP_DEBUG_PRINT("audio thread paused\n");
while (_paused) { // delay until we stop pausing
PspThread::delayMicros(100000); // 100ms
if (!_paused)
PSP_DEBUG_PRINT("audio thread unpaused\n");
}
PSP_DEBUG_PRINT("filling buffer[%d]\n", _bufferToFill);
_callback(_userData, _buffers[_bufferToFill], _bufferSize); // ask mixer to fill in data
nextBuffer(_bufferToFill);
PSP_DEBUG_PRINT("playing buffer[%d].\n", _bufferToPlay);
playBuffer();
nextBuffer(_bufferToPlay);
} // while _init
// destroy everything
free(_buffers[0]);
sceAudioChRelease(_pspChannel);
PSP_DEBUG_PRINT("audio thread exiting. ****************************\n");
}
// Much faster than using %, especially with conditional moves (MIPS)
inline void PspAudio::nextBuffer(int &bufferIdx) {
DEBUG_ENTER_FUNC();
bufferIdx++;
if (bufferIdx >= NUM_BUFFERS)
bufferIdx = 0;
}
// Don't do it with blocking
inline bool PspAudio::playBuffer() {
DEBUG_ENTER_FUNC();
int ret;
if (_numOfChannels == 1)
ret = sceAudioOutputBlocking(_pspChannel, PSP_AUDIO_VOLUME_MAX, _buffers[_bufferToPlay]);
else
ret = sceAudioOutputPannedBlocking(_pspChannel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, _buffers[_bufferToPlay]);
if (ret < 0) {
PSP_ERROR("failed to output audio. Error[%d]\n", ret);
return false;
}
return true;
}
void PspAudio::close() {
PSP_DEBUG_PRINT("close has been called ***************\n");
_init = false;
}
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