198 lines
6.4 KiB
C++
198 lines
6.4 KiB
C++
/*************************************************************************/
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/* audio_driver_iphone.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_driver_iphone.h"
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Error AudioDriverIphone::init() {
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active = false;
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channels = 2;
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AudioStreamBasicDescription strdesc;
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strdesc.mFormatID = kAudioFormatLinearPCM;
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strdesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
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strdesc.mChannelsPerFrame = channels;
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strdesc.mSampleRate = 44100;
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strdesc.mFramesPerPacket = 1;
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strdesc.mBitsPerChannel = 16;
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strdesc.mBytesPerFrame =
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strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
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strdesc.mBytesPerPacket =
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strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
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OSStatus result = noErr;
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AURenderCallbackStruct callback;
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AudioComponentDescription desc;
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AudioComponent comp = NULL;
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const AudioUnitElement output_bus = 0;
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const AudioUnitElement bus = output_bus;
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const AudioUnitScope scope = kAudioUnitScope_Input;
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zeromem(&desc, sizeof(desc));
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = kAudioUnitSubType_RemoteIO; /* !!! FIXME: ? */
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comp = AudioComponentFindNext(NULL, &desc);
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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result = AudioComponentInstanceNew(comp, &audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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ERR_FAIL_COND_V(comp == NULL, FAILED);
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result = AudioUnitSetProperty(audio_unit,
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kAudioUnitProperty_StreamFormat,
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scope, bus, &strdesc, sizeof(strdesc));
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ERR_FAIL_COND_V(result != noErr, FAILED);
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zeromem(&callback, sizeof(AURenderCallbackStruct));
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callback.inputProc = &AudioDriverIphone::output_callback;
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callback.inputProcRefCon = this;
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result = AudioUnitSetProperty(audio_unit,
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kAudioUnitProperty_SetRenderCallback,
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scope, bus, &callback, sizeof(callback));
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ERR_FAIL_COND_V(result != noErr, FAILED);
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result = AudioUnitInitialize(audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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result = AudioOutputUnitStart(audio_unit);
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ERR_FAIL_COND_V(result != noErr, FAILED);
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const int samples = 1024;
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samples_in = memnew_arr(int32_t, samples); // whatever
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buffer_frames = samples / channels;
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return FAILED;
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};
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OSStatus AudioDriverIphone::output_callback(void *inRefCon,
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AudioUnitRenderActionFlags *ioActionFlags,
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const AudioTimeStamp *inTimeStamp,
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UInt32 inBusNumber, UInt32 inNumberFrames,
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AudioBufferList *ioData) {
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AudioBuffer *abuf;
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AudioDriverIphone *ad = (AudioDriverIphone *)inRefCon;
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bool mix = true;
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if (!ad->active)
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mix = false;
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else if (ad->mutex) {
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mix = ad->mutex->try_lock() == OK;
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};
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if (!mix) {
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for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
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abuf = &ioData->mBuffers[i];
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zeromem(abuf->mData, abuf->mDataByteSize);
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};
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return 0;
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};
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int frames_left;
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for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
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abuf = &ioData->mBuffers[i];
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frames_left = inNumberFrames;
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int16_t *out = (int16_t *)abuf->mData;
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while (frames_left) {
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int frames = MIN(frames_left, ad->buffer_frames);
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//ad->lock();
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ad->audio_server_process(frames, ad->samples_in);
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//ad->unlock();
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for (int i = 0; i < frames * ad->channels; i++) {
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out[i] = ad->samples_in[i] >> 16;
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}
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frames_left -= frames;
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out += frames * ad->channels;
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};
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};
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if (ad->mutex)
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ad->mutex->unlock();
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return 0;
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};
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void AudioDriverIphone::start() {
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active = true;
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// Resume audio
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// iOS audio-thread stoped if it is interrupted cause by an incoming phone call
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// Use AudioOutputUnitStart to re-create audio-thread
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OSStatus result = AudioOutputUnitStart(audio_unit);
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ERR_FAIL_COND(result != noErr);
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};
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int AudioDriverIphone::get_mix_rate() const {
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return 44100;
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};
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AudioDriverSW::OutputFormat AudioDriverIphone::get_output_format() const {
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return OUTPUT_STEREO;
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};
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void AudioDriverIphone::lock() {
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if (active && mutex)
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mutex->lock();
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};
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void AudioDriverIphone::unlock() {
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if (active && mutex)
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mutex->unlock();
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};
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void AudioDriverIphone::finish() {
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AURenderCallbackStruct callback;
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zeromem(&callback, sizeof(AURenderCallbackStruct));
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OSStatus result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callback, sizeof(callback));
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if (result != noErr) {
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ERR_PRINT("AudioUnitSetProperty failed");
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}
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if (samples_in) {
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memdelete_arr(samples_in);
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samples_in = NULL;
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}
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};
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AudioDriverIphone::AudioDriverIphone() {
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mutex = Mutex::create(); //NULL;
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};
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AudioDriverIphone::~AudioDriverIphone(){
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};
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