chromecast/media/cma/base/coded_frame_provider.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 #ifndef CHROMECAST_MEDIA_CMA_BASE_CODED_FRAME_PROVIDER_H_
   6 #define CHROMECAST_MEDIA_CMA_BASE_CODED_FRAME_PROVIDER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/macros.h"
  10 #include "base/memory/ref_counted.h"
  11
  12 namespace media {
  13 class AudioDecoderConfig;
  14 class VideoDecoderConfig;
  15 }
  16
  17 namespace chromecast {
  18 namespace media {
  19 class DecoderBufferBase;
  20
  21 class CodedFrameProvider {
  22  public:
  23   typedef base::Callback<void(const scoped_refptr<DecoderBufferBase>&,
  24                               const ::media::AudioDecoderConfig&,
  25                               const ::media::VideoDecoderConfig&)> ReadCB;
  26
  27   CodedFrameProvider();
  28   virtual ~CodedFrameProvider();
  29
  30   // Request a coded frame which is provided asynchronously through callback
  31   // |read_cb|.
  32   // If the frame is associated with a new video/audio configuration,
  33   // these configurations are returned as part of the |read_cb| callback.
  34   // Invoking the |read_cb| callback with invalid audio/video configurations
  35   // means the configurations have not changed.
  36   virtual void Read(const ReadCB& read_cb) = 0;
  37
  38   // Flush the coded frames held by the frame provider.
  39   // Invoke callback |flush_cb| when completed.
  40   // Note: any pending read is cancelled, meaning that any pending |read_cb|
  41   // callback will not be invoked.
  42   virtual void Flush(const base::Closure& flush_cb) = 0;
  43
  44  private:
  45   DISALLOW_COPY_AND_ASSIGN(CodedFrameProvider);
  46 };
  47
  48 }  // namespace media
  49 }  // namespace chromecast
  50
  51 #endif  // CHROMECAST_MEDIA_CMA_BASE_CODED_FRAME_PROVIDER_H_