12c08ceee3
This adds CoreAudio as audio backend on macOS. CoreAudio is the standard audio API on macOS. Ref T86590
128 lines
3.1 KiB
C++
128 lines
3.1 KiB
C++
/*******************************************************************************
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* Copyright 2009-2016 Jörg Müller
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#include "CoreAudioSynchronizer.h"
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#include "CoreAudioDevice.h"
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#include "Exception.h"
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AUD_NAMESPACE_BEGIN
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CoreAudioSynchronizer::CoreAudioSynchronizer(AudioUnit& audio_unit) :
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m_clock_ref(nullptr),
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m_playing(false)
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{
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OSStatus status = CAClockNew(0, &m_clock_ref);
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if(status != noErr)
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AUD_THROW(DeviceException, "Could not create a CoreAudio clock.");
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CAClockTimebase timebase = kCAClockTimebase_AudioOutputUnit;
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status = CAClockSetProperty(m_clock_ref, kCAClockProperty_InternalTimebase, sizeof(timebase), &timebase);
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if(status != noErr)
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{
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CAClockDispose(m_clock_ref);
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AUD_THROW(DeviceException, "Could not create a CoreAudio clock.");
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}
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status = CAClockSetProperty(m_clock_ref, kCAClockProperty_TimebaseSource, sizeof(audio_unit), &audio_unit);
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if(status != noErr)
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{
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CAClockDispose(m_clock_ref);
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AUD_THROW(DeviceException, "Could not create a CoreAudio clock.");
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}
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CAClockSyncMode sync_mode = kCAClockSyncMode_Internal;
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status = CAClockSetProperty(m_clock_ref, kCAClockProperty_SyncMode, sizeof(sync_mode), &sync_mode);
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if(status != noErr)
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{
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CAClockDispose(m_clock_ref);
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AUD_THROW(DeviceException, "Could not create a CoreAudio clock.");
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}
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}
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CoreAudioSynchronizer::~CoreAudioSynchronizer()
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{
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CAClockDispose(m_clock_ref);
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}
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void CoreAudioSynchronizer::seek(std::shared_ptr<IHandle> handle, double time)
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{
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if(m_playing)
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CAClockStop(m_clock_ref);
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CAClockTime clock_time;
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clock_time.format = kCAClockTimeFormat_Seconds;
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clock_time.time.seconds = time;
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CAClockSetCurrentTime(m_clock_ref, &clock_time);
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handle->seek(time);
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if(m_playing)
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CAClockStart(m_clock_ref);
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}
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double CoreAudioSynchronizer::getPosition(std::shared_ptr<IHandle> handle)
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{
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CAClockTime clock_time;
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OSStatus status;
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if(m_playing)
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status = CAClockGetCurrentTime(m_clock_ref, kCAClockTimeFormat_Seconds, &clock_time);
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else
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status = CAClockGetStartTime(m_clock_ref, kCAClockTimeFormat_Seconds, &clock_time);
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if(status != noErr)
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return 0;
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return clock_time.time.seconds;
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}
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void CoreAudioSynchronizer::play()
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{
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if(m_playing)
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return;
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m_playing = true;
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CAClockStart(m_clock_ref);
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}
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void CoreAudioSynchronizer::stop()
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{
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if(!m_playing)
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return;
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m_playing = false;
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CAClockStop(m_clock_ref);
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}
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void CoreAudioSynchronizer::setSyncCallback(ISynchronizer::syncFunction function, void* data)
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{
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}
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int CoreAudioSynchronizer::isPlaying()
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{
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return m_playing;
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}
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AUD_NAMESPACE_END
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