| /* |
| * 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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. |
| */ |
| |
| #ifndef WebAudioBus_h |
| #define WebAudioBus_h |
| |
| #include "WebCommon.h" |
| |
| #if INSIDE_BLINK |
| namespace WTF { template <typename T> class PassRefPtr; } |
| #endif |
| |
| namespace blink { |
| |
| class AudioBus; |
| |
| // A container for multi-channel linear PCM audio data. |
| // |
| // WARNING: It is not safe to pass a WebAudioBus across threads!!! |
| // |
| class BLINK_PLATFORM_EXPORT WebAudioBus { |
| public: |
| WebAudioBus() : m_private(0) { } |
| ~WebAudioBus() { reset(); } |
| |
| // initialize() allocates memory of the given length for the given number of channels. |
| void initialize(unsigned numberOfChannels, size_t length, double sampleRate); |
| |
| // resizeSmaller() can only be called after initialize() with a new length <= the initialization length. |
| // The data stored in the bus will remain undisturbed. |
| void resizeSmaller(size_t newLength); |
| |
| // reset() releases the memory allocated from initialize(). |
| void reset(); |
| |
| unsigned numberOfChannels() const; |
| size_t length() const; |
| double sampleRate() const; |
| |
| float* channelData(unsigned channelIndex); |
| |
| #if INSIDE_BLINK |
| WTF::PassRefPtr<AudioBus> release(); |
| #endif |
| |
| private: |
| // Disallow copy and assign. |
| WebAudioBus(const WebAudioBus&); |
| void operator=(const WebAudioBus&); |
| |
| AudioBus* m_private; |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebAudioBus_h |