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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.
*
*/
// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "backends/platform/iphone/osys_main.h"
void OSystem_IPHONE::AQBufferCallback(void *in, AudioQueueRef inQ, AudioQueueBufferRef outQB) {
//printf("AQBufferCallback()\n");
if (s_AudioQueue.frameCount > 0 && s_soundCallback != NULL) {
outQB->mAudioDataByteSize = 4 * s_AudioQueue.frameCount;
s_soundCallback(s_soundParam, (byte *)outQB->mAudioData, outQB->mAudioDataByteSize);
AudioQueueEnqueueBuffer(inQ, outQB, 0, NULL);
} else {
AudioQueueStop(s_AudioQueue.queue, false);
}
}
void OSystem_IPHONE::mixCallback(void *sys, byte *samples, int len) {
OSystem_IPHONE *this_ = (OSystem_IPHONE *)sys;
assert(this_);
if (this_->_mixer) {
this_->_mixer->mixCallback(samples, len);
}
}
void OSystem_IPHONE::setupMixer() {
_mixer = new Audio::MixerImpl(AUDIO_SAMPLE_RATE);
s_soundCallback = mixCallback;
s_soundParam = this;
startSoundsystem();
}
void OSystem_IPHONE::startSoundsystem() {
s_AudioQueue.dataFormat.mSampleRate = AUDIO_SAMPLE_RATE;
s_AudioQueue.dataFormat.mFormatID = kAudioFormatLinearPCM;
s_AudioQueue.dataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
s_AudioQueue.dataFormat.mBytesPerPacket = 4;
s_AudioQueue.dataFormat.mFramesPerPacket = 1;
s_AudioQueue.dataFormat.mBytesPerFrame = 4;
s_AudioQueue.dataFormat.mChannelsPerFrame = 2;
s_AudioQueue.dataFormat.mBitsPerChannel = 16;
s_AudioQueue.frameCount = WAVE_BUFFER_SIZE;
if (AudioQueueNewOutput(&s_AudioQueue.dataFormat, AQBufferCallback, &s_AudioQueue, 0, kCFRunLoopCommonModes, 0, &s_AudioQueue.queue)) {
printf("Couldn't set the AudioQueue callback!\n");
_mixer->setReady(false);
return;
}
uint32 bufferBytes = s_AudioQueue.frameCount * s_AudioQueue.dataFormat.mBytesPerFrame;
for (int i = 0; i < AUDIO_BUFFERS; i++) {
if (AudioQueueAllocateBuffer(s_AudioQueue.queue, bufferBytes, &s_AudioQueue.buffers[i])) {
printf("Error allocating AudioQueue buffer!\n");
_mixer->setReady(false);
return;
}
AQBufferCallback(&s_AudioQueue, s_AudioQueue.queue, s_AudioQueue.buffers[i]);
}
AudioQueueSetParameter(s_AudioQueue.queue, kAudioQueueParam_Volume, 1.0);
if (AudioQueueStart(s_AudioQueue.queue, NULL)) {
printf("Error starting the AudioQueue!\n");
_mixer->setReady(false);
return;
}
_mixer->setReady(true);
}
void OSystem_IPHONE::stopSoundsystem() {
AudioQueueStop(s_AudioQueue.queue, true);
for (int i = 0; i < AUDIO_BUFFERS; i++) {
AudioQueueFreeBuffer(s_AudioQueue.queue, s_AudioQueue.buffers[i]);
}
AudioQueueDispose(s_AudioQueue.queue, true);
_mixer->setReady(false);
}
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