15abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick/* 25abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * Copyright (C) 2010 Google Inc. All rights reserved. 35abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * 45abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * Redistribution and use in source and binary forms, with or without 55abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * modification, are permitted provided that the following conditions are 65abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * met: 75abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * 85abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * * Redistributions of source code must retain the above copyright 95abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * notice, this list of conditions and the following disclaimer. 105abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * * Redistributions in binary form must reproduce the above 115abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * copyright notice, this list of conditions and the following disclaimer 125abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * in the documentation and/or other materials provided with the 135abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * distribution. 145abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * * Neither the name of Google Inc. nor the names of its 155abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * contributors may be used to endorse or promote products derived from 165abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * this software without specific prior written permission. 175abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * 185abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick */ 305abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 315abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick#include "config.h" 325abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 335abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick#if ENABLE(WEB_AUDIO) 345abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 355abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick#include "AudioDSPKernelProcessor.h" 365abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 375abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick#include "AudioDSPKernel.h" 385abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 395abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merricknamespace WebCore { 405abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 415abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick// setNumberOfChannels() may later be called if the object is not yet in an "initialized" state. 425abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain MerrickAudioDSPKernelProcessor::AudioDSPKernelProcessor(double sampleRate, unsigned numberOfChannels) 435abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick : AudioProcessor(sampleRate) 445abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick , m_numberOfChannels(numberOfChannels) 455abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick , m_hasJustReset(true) 465abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 475abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 485abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 495abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrickvoid AudioDSPKernelProcessor::initialize() 505abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 515abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (isInitialized()) 525abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 535abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 545abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick ASSERT(!m_kernels.size()); 555abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 565abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick // Create processing kernels, one per channel. 575abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick for (unsigned i = 0; i < numberOfChannels(); ++i) 585abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_kernels.append(createKernel()); 595abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 605abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_initialized = true; 615abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 625abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 635abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrickvoid AudioDSPKernelProcessor::uninitialize() 645abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 655abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!isInitialized()) 665abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 675abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 685abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_kernels.clear(); 695abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 705abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_initialized = false; 715abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 725abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 735abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrickvoid AudioDSPKernelProcessor::process(AudioBus* source, AudioBus* destination, size_t framesToProcess) 745abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 755abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick ASSERT(source && destination); 765abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!source || !destination) 775abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 785abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 795abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!isInitialized()) { 805abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick destination->zero(); 815abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 825abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick } 835abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 845abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick bool channelCountMatches = source->numberOfChannels() == destination->numberOfChannels() && source->numberOfChannels() == m_kernels.size(); 855abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick ASSERT(channelCountMatches); 865abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!channelCountMatches) 875abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 885abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 895abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick for (unsigned i = 0; i < m_kernels.size(); ++i) 905abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_kernels[i]->process(source->channel(i)->data(), destination->channel(i)->data(), framesToProcess); 915abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 925abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 935abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick// Resets filter state 945abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrickvoid AudioDSPKernelProcessor::reset() 955abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 965abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!isInitialized()) 975abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick return; 985abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 995abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick // Forces snap to parameter values - first time. 1005abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick // Any processing depending on this value must set it to false at the appropriate time. 1015abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_hasJustReset = true; 1025abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 1035abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick for (unsigned i = 0; i < m_kernels.size(); ++i) 1045abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_kernels[i]->reset(); 1055abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 1065abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 1075abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrickvoid AudioDSPKernelProcessor::setNumberOfChannels(unsigned numberOfChannels) 1085abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick{ 1095abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick ASSERT(!isInitialized()); 1105abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick if (!isInitialized()) 1115abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick m_numberOfChannels = numberOfChannels; 1125abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} 1135abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 1145abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick} // namespace WebCore 1155abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick 1165abb8606fa57c3ebfc8b3c3dbc3fa4a25d2ae306Iain Merrick#endif // ENABLE(WEB_AUDIO) 117