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

   1 /*
   2  * Copyright (C) 2011, Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1.  Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #ifndef AudioSourceProviderClient_h
  26 #define AudioSourceProviderClient_h
  27
  28 #include "platform/heap/Handle.h"
  29 #include "platform/weborigin/KURL.h"
  30
  31 namespace blink {
  32
  33 class AudioSourceProviderClient : public GarbageCollectedMixin {
  34 public:
  35     virtual void setFormat(size_t numberOfChannels, float sampleRate) = 0;
  36     // Oilpan: Callers should keep this object alive during lock() and unlock().
  37     virtual void lock() { }
  38     virtual void unlock() { }
  39
  40     // Called on the main thread when HTMLMediaElement::currentSrc() is
  41     // changed.
  42     virtual void onCurrentSrcChanged(const KURL& currentSrc) { }
  43
  44     DEFINE_INLINE_VIRTUAL_TRACE() { }
  45 protected:
  46     virtual ~AudioSourceProviderClient() { }
  47 };
  48
  49 } // namespace blink
  50
  51 #endif // AudioSourceProviderClient_h