15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2010, Google Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * documentation and/or other materials provided with the distribution. 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef AudioDestinationNode_h 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define AudioDestinationNode_h 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 281e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/audio/AudioBus.h" 291e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/audio/AudioIOCallback.h" 301e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/audio/AudioSourceProvider.h" 3153e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)#include "modules/webaudio/AudioBuffer.h" 3253e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)#include "modules/webaudio/AudioNode.h" 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 34c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)namespace blink { 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class AudioBus; 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class AudioContext; 3802772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)class AudioDestinationNode : public AudioNode, public AudioIOCallback { 407242dc3dbeb210b5e876a3c42d1ec1a667fc621aPrimiano Tucci DEFINE_WRAPPERTYPEINFO(); 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)public: 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) AudioDestinationNode(AudioContext*, float sampleRate); 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual ~AudioDestinationNode(); 4402772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 4502772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch // AudioNode 46c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) virtual void dispose() OVERRIDE; 4709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual void process(size_t) OVERRIDE FINAL { } // we're pulled by hardware so this is never called 4802772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The audio hardware calls render() to get the next render quantum of audio into destinationBus. 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // It will optionally give us local/live audio input in sourceBus (if it's not 0). 5109380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFrames) OVERRIDE FINAL; 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) size_t currentSampleFrame() const { return m_currentSampleFrame; } 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) double currentTime() const { return currentSampleFrame() / static_cast<double>(sampleRate()); } 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 56926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) virtual unsigned long maxChannelCount() const { return 0; } 57926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) virtual void startRendering() = 0; 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)protected: 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // LocalAudioInputProvider allows us to expose an AudioSourceProvider for local/live audio input. 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // If there is local/live audio input, we call set() with the audio input data every render quantum. 6309380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) class LocalAudioInputProvider FINAL : public AudioSourceProvider { 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) public: 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LocalAudioInputProvider() 6681a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) : m_sourceBus(AudioBus::create(2, AudioNode::ProcessingSizeInFrames)) // FIXME: handle non-stereo local input. 675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) void set(AudioBus* bus) 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (bus) 7381a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) m_sourceBus->copyFrom(*bus); 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // AudioSourceProvider. 7709380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual void provideInput(AudioBus* destinationBus, size_t numberOfFrames) OVERRIDE 785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) { 7981a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) bool isGood = destinationBus && destinationBus->length() == numberOfFrames && m_sourceBus->length() == numberOfFrames; 805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(isGood); 815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (isGood) 8281a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) destinationBus->copyFrom(*m_sourceBus); 835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) private: 8681a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) RefPtr<AudioBus> m_sourceBus; 875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) }; 885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 8909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual double tailTime() const OVERRIDE FINAL { return 0; } 9009380295ba73501a205346becac22c6978e4671dTorne (Richard Coles) virtual double latencyTime() const OVERRIDE FINAL { return 0; } 915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Counts the number of sample-frames processed by the destination. 935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) size_t m_currentSampleFrame; 945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LocalAudioInputProvider m_localAudioInputProvider; 965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)}; 975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 98c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles)} // namespace blink 995c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1005c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif // AudioDestinationNode_h 101