diff options
Diffstat (limited to 'backends/platform/ios7/ios7_osys_sound.cpp')
-rw-r--r-- | backends/platform/ios7/ios7_osys_sound.cpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/backends/platform/ios7/ios7_osys_sound.cpp b/backends/platform/ios7/ios7_osys_sound.cpp new file mode 100644 index 0000000000..0dc81a9385 --- /dev/null +++ b/backends/platform/ios7/ios7_osys_sound.cpp @@ -0,0 +1,105 @@ +/* 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 "ios7_osys_main.h" + +void OSystem_iOS7::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_iOS7::mixCallback(void *sys, byte *samples, int len) { + OSystem_iOS7 *this_ = (OSystem_iOS7 *)sys; + assert(this_); + + if (this_->_mixer) { + this_->_mixer->mixCallback(samples, len); + } +} + +void OSystem_iOS7::setupMixer() { + _mixer = new Audio::MixerImpl(this, AUDIO_SAMPLE_RATE); + + s_soundCallback = mixCallback; + s_soundParam = this; + + startSoundsystem(); +} + +void OSystem_iOS7::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_iOS7::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); +} |