media/audio/android/opensles_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_AUDIO_ANDROID_OPENSLES_UTIL_H_
   6 #define MEDIA_AUDIO_ANDROID_OPENSLES_UTIL_H_
   7
   8 #include <SLES/OpenSLES.h>
   9
  10 #include "base/logging.h"
  11
  12 namespace media {
  13
  14 template <typename SLType, typename SLDerefType>
  15 class ScopedSLObject {
  16  public:
  17   ScopedSLObject() : obj_(NULL) {}
  18
  19   ~ScopedSLObject() { Reset(); }
  20
  21   SLType* Receive() {
  22     DCHECK(!obj_);
  23     return &obj_;
  24   }
  25
  26   SLDerefType operator->() { return *obj_; }
  27
  28   SLType Get() const { return obj_; }
  29
  30   void Reset() {
  31     if (obj_) {
  32       (*obj_)->Destroy(obj_);
  33       obj_ = NULL;
  34     }
  35   }
  36
  37  private:
  38   SLType obj_;
  39 };
  40
  41 typedef ScopedSLObject<SLObjectItf, const SLObjectItf_*> ScopedSLObjectItf;
  42
  43 }  // namespace media
  44
  45 #endif  // MEDIA_AUDIO_ANDROID_OPENSLES_UTIL_H_