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
12namespace media {
13class AudioDecoderConfig;
14class VideoDecoderConfig;
15}
16
17namespace chromecast {
18namespace media {
19class DecoderBufferBase;
20
21class 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_
52