third_party/WebKit/Source/platform/audio/AudioSourceProviderClient.h

/*
 * Copyright (C) 2011, 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef AudioSourceProviderClient_h
#define AudioSourceProviderClient_h

#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"

namespace blink {

class AudioSourceProviderClient : public GarbageCollectedMixin {
public:
    virtual void setFormat(size_t numberOfChannels, float sampleRate) = 0;
    // Oilpan: Callers should keep this object alive during lock() and unlock().
    virtual void lock() { }
    virtual void unlock() { }

    // Called on the main thread when HTMLMediaElement::currentSrc() is
    // changed.
    virtual void onCurrentSrcChanged(const KURL& currentSrc) { }

    DEFINE_INLINE_VIRTUAL_TRACE() { }
protected:
    virtual ~AudioSourceProviderClient() { }
};

} // namespace blink

#endif // AudioSourceProviderClient_h