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/*************************************************************************/
/* audio_driver_iphone.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_driver_iphone.h"
Error AudioDriverIphone::init() {
active = false;
channels = 2;
AudioStreamBasicDescription strdesc;
strdesc.mFormatID = kAudioFormatLinearPCM;
strdesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
strdesc.mChannelsPerFrame = channels;
strdesc.mSampleRate = 44100;
strdesc.mFramesPerPacket = 1;
strdesc.mBitsPerChannel = 16;
strdesc.mBytesPerFrame =
strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
strdesc.mBytesPerPacket =
strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
OSStatus result = noErr;
AURenderCallbackStruct callback;
AudioComponentDescription desc;
AudioComponent comp = NULL;
const AudioUnitElement output_bus = 0;
const AudioUnitElement bus = output_bus;
const AudioUnitScope scope = kAudioUnitScope_Input;
zeromem(&desc, sizeof(desc));
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_RemoteIO; /* !!! FIXME: ? */
comp = AudioComponentFindNext(NULL, &desc);
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
result = AudioComponentInstanceNew(comp, &audio_unit);
ERR_FAIL_COND_V(result != noErr, FAILED);
ERR_FAIL_COND_V(comp == NULL, FAILED);
result = AudioUnitSetProperty(audio_unit,
kAudioUnitProperty_StreamFormat,
scope, bus, &strdesc, sizeof(strdesc));
ERR_FAIL_COND_V(result != noErr, FAILED);
zeromem(&callback, sizeof(AURenderCallbackStruct));
callback.inputProc = &AudioDriverIphone::output_callback;
callback.inputProcRefCon = this;
result = AudioUnitSetProperty(audio_unit,
kAudioUnitProperty_SetRenderCallback,
scope, bus, &callback, sizeof(callback));
ERR_FAIL_COND_V(result != noErr, FAILED);
result = AudioUnitInitialize(audio_unit);
ERR_FAIL_COND_V(result != noErr, FAILED);
result = AudioOutputUnitStart(audio_unit);
ERR_FAIL_COND_V(result != noErr, FAILED);
const int samples = 1024;
samples_in = memnew_arr(int32_t, samples); // whatever
buffer_frames = samples / channels;
return FAILED;
};
OSStatus AudioDriverIphone::output_callback(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber, UInt32 inNumberFrames,
AudioBufferList *ioData) {
AudioBuffer *abuf;
AudioDriverIphone *ad = (AudioDriverIphone *)inRefCon;
bool mix = true;
if (!ad->active)
mix = false;
else if (ad->mutex) {
mix = ad->mutex->try_lock() == OK;
};
if (!mix) {
for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
abuf = &ioData->mBuffers[i];
zeromem(abuf->mData, abuf->mDataByteSize);
};
return 0;
};
int frames_left;
for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
abuf = &ioData->mBuffers[i];
frames_left = inNumberFrames;
int16_t *out = (int16_t *)abuf->mData;
while (frames_left) {
int frames = MIN(frames_left, ad->buffer_frames);
//ad->lock();
ad->audio_server_process(frames, ad->samples_in);
//ad->unlock();
for (int i = 0; i < frames * ad->channels; i++) {
out[i] = ad->samples_in[i] >> 16;
}
frames_left -= frames;
out += frames * ad->channels;
};
};
if (ad->mutex)
ad->mutex->unlock();
return 0;
};
void AudioDriverIphone::start() {
active = true;
};
int AudioDriverIphone::get_mix_rate() const {
return 44100;
};
AudioDriver::SpeakerMode AudioDriverIphone::get_speaker_mode() const {
return SPEAKER_MODE_STEREO;
};
void AudioDriverIphone::lock() {
if (active && mutex)
mutex->lock();
};
void AudioDriverIphone::unlock() {
if (active && mutex)
mutex->unlock();
};
void AudioDriverIphone::finish() {
memdelete_arr(samples_in);
};
AudioDriverIphone::AudioDriverIphone() {
mutex = Mutex::create(); //NULL;
};
AudioDriverIphone::~AudioDriverIphone(){
};
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