| /* |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(WEB_AUDIO) |
| |
| #if PLATFORM(MAC) |
| |
| #include "AudioDestinationMac.h" |
| |
| #include "AudioIOCallback.h" |
| #include "AudioSession.h" |
| #include "FloatConversion.h" |
| #include "Logging.h" |
| #include "PlatformMediaSessionManager.h" |
| #include "VectorMath.h" |
| #include <CoreAudio/AudioHardware.h> |
| |
| namespace WebCore { |
| |
| const int kBufferSize = 128; |
| const float kLowThreshold = -1; |
| const float kHighThreshold = 1; |
| |
| // Factory method: Mac-implementation |
| std::unique_ptr<AudioDestination> AudioDestination::create(AudioIOCallback& callback, const String&, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate) |
| { |
| // FIXME: make use of inputDeviceId as appropriate. |
| |
| // FIXME: Add support for local/live audio input. |
| if (numberOfInputChannels) |
| LOG(Media, "AudioDestination::create(%u, %u, %f) - unhandled input channels", numberOfInputChannels, numberOfOutputChannels, sampleRate); |
| |
| // FIXME: Add support for multi-channel (> stereo) output. |
| if (numberOfOutputChannels != 2) |
| LOG(Media, "AudioDestination::create(%u, %u, %f) - unhandled output channels", numberOfInputChannels, numberOfOutputChannels, sampleRate); |
| |
| return std::make_unique<AudioDestinationMac>(callback, sampleRate); |
| } |
| |
| float AudioDestination::hardwareSampleRate() |
| { |
| // Determine the default output device's sample-rate. |
| return AudioSession::sharedSession().sampleRate(); |
| } |
| |
| unsigned long AudioDestination::maxChannelCount() |
| { |
| // FIXME: query the default audio hardware device to return the actual number |
| // of channels of the device. Also see corresponding FIXME in create(). |
| // There is a small amount of code which assumes stereo in AudioDestinationMac which |
| // can be upgraded. |
| return 0; |
| } |
| |
| AudioDestinationMac::AudioDestinationMac(AudioIOCallback& callback, float sampleRate) |
| : m_outputUnit(0) |
| , m_callback(callback) |
| , m_renderBus(AudioBus::create(2, kBufferSize, false)) |
| , m_sampleRate(sampleRate) |
| , m_isPlaying(false) |
| { |
| // Open and initialize DefaultOutputUnit |
| AudioComponent comp; |
| AudioComponentDescription desc; |
| |
| desc.componentType = kAudioUnitType_Output; |
| desc.componentSubType = kAudioUnitSubType_DefaultOutput; |
| desc.componentManufacturer = kAudioUnitManufacturer_Apple; |
| desc.componentFlags = 0; |
| desc.componentFlagsMask = 0; |
| comp = AudioComponentFindNext(0, &desc); |
| |
| ASSERT(comp); |
| |
| OSStatus result = AudioComponentInstanceNew(comp, &m_outputUnit); |
| ASSERT(!result); |
| |
| result = AudioUnitInitialize(m_outputUnit); |
| ASSERT(!result); |
| |
| configure(); |
| } |
| |
| AudioDestinationMac::~AudioDestinationMac() |
| { |
| if (m_outputUnit) |
| AudioComponentInstanceDispose(m_outputUnit); |
| } |
| |
| void AudioDestinationMac::configure() |
| { |
| // Set render callback |
| AURenderCallbackStruct input; |
| input.inputProc = inputProc; |
| input.inputProcRefCon = this; |
| OSStatus result = AudioUnitSetProperty(m_outputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Global, 0, &input, sizeof(input)); |
| ASSERT(!result); |
| |
| // Set stream format |
| AudioStreamBasicDescription streamFormat; |
| streamFormat.mSampleRate = m_sampleRate; |
| streamFormat.mFormatID = kAudioFormatLinearPCM; |
| streamFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked | kAudioFormatFlagIsNonInterleaved; |
| streamFormat.mBitsPerChannel = 8 * sizeof(Float32); |
| streamFormat.mChannelsPerFrame = 2; |
| streamFormat.mFramesPerPacket = 1; |
| streamFormat.mBytesPerPacket = sizeof(Float32); |
| streamFormat.mBytesPerFrame = sizeof(Float32); |
| |
| result = AudioUnitSetProperty(m_outputUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, (void*)&streamFormat, sizeof(AudioStreamBasicDescription)); |
| ASSERT(!result); |
| } |
| |
| void AudioDestinationMac::start() |
| { |
| OSStatus result = AudioOutputUnitStart(m_outputUnit); |
| |
| if (!result) |
| setIsPlaying(true); |
| } |
| |
| void AudioDestinationMac::stop() |
| { |
| OSStatus result = AudioOutputUnitStop(m_outputUnit); |
| |
| if (!result) |
| setIsPlaying(false); |
| } |
| |
| // Pulls on our provider to get rendered audio stream. |
| OSStatus AudioDestinationMac::render(UInt32 numberOfFrames, AudioBufferList* ioData) |
| { |
| AudioBuffer* buffers = ioData->mBuffers; |
| m_renderBus->setChannelMemory(0, (float*)buffers[0].mData, numberOfFrames); |
| m_renderBus->setChannelMemory(1, (float*)buffers[1].mData, numberOfFrames); |
| |
| // FIXME: Add support for local/live audio input. |
| m_callback.render(0, m_renderBus.get(), numberOfFrames); |
| |
| // Clamp values at 0db (i.e., [-1.0, 1.0]) |
| for (unsigned i = 0; i < m_renderBus->numberOfChannels(); ++i) { |
| AudioChannel* channel = m_renderBus->channel(i); |
| if (!channel->isSilent()) |
| VectorMath::vclip(channel->data(), 1, &kLowThreshold, &kHighThreshold, channel->mutableData(), 1, numberOfFrames); |
| } |
| |
| return noErr; |
| } |
| |
| void AudioDestinationMac::setIsPlaying(bool isPlaying) |
| { |
| if (m_isPlaying == isPlaying) |
| return; |
| |
| m_isPlaying = isPlaying; |
| m_callback.isPlayingDidChange(); |
| } |
| |
| // DefaultOutputUnit callback |
| OSStatus AudioDestinationMac::inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 /*busNumber*/, UInt32 numberOfFrames, AudioBufferList* ioData) |
| { |
| AudioDestinationMac* audioOutput = static_cast<AudioDestinationMac*>(userData); |
| return audioOutput->render(numberOfFrames, ioData); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // PLATFORM(MAC) |
| |
| #endif // ENABLE(WEB_AUDIO) |