media/ffmpeg/ffmpeg_deleters.h

   1 // Copyright 2014 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 // This file contains declarations for deleters for use with |scoped_ptr|. To
   6 // avoid requiring additional #includes, the (inline) definitions are in
   7 // ffmpeg_common.h. (Forward declarations of deleters aren't sufficient for
   8 // |scoped_ptr|.)
   9
  10 #ifndef MEDIA_FFMPEG_FFMPEG_DELETERS_H_
  11 #define MEDIA_FFMPEG_FFMPEG_DELETERS_H_
  12
  13 namespace media {
  14
  15 // Wraps FFmpeg's av_free() in a class that can be passed as a template argument
  16 // to scoped_ptr_malloc.
  17 struct ScopedPtrAVFree {
  18   void operator()(void* x) const;
  19 };
  20
  21 // This assumes that the AVPacket being captured was allocated outside of
  22 // FFmpeg via the new operator.  Do not use this with AVPacket instances that
  23 // are allocated via malloc() or av_malloc().
  24 struct ScopedPtrAVFreePacket {
  25   void operator()(void* x) const;
  26 };
  27
  28 // Frees an AVCodecContext object in a class that can be passed as a Deleter
  29 // argument to scoped_ptr_malloc.
  30 struct ScopedPtrAVFreeContext {
  31   void operator()(void* x) const;
  32 };
  33
  34 // Frees an AVFrame object in a class that can be passed as a Deleter argument
  35 // to scoped_ptr_malloc.
  36 struct ScopedPtrAVFreeFrame {
  37   void operator()(void* x) const;
  38 };
  39
  40 }  // namespace media
  41
  42 #endif  // MEDIA_FFMPEG_FFMPEG_DELETERS_H_