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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ | 5 #ifndef MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ |
6 #define MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ | 6 #define MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/macros.h" | 9 #include "base/macros.h" |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
11 #include "media/base/audio_bus.h" | 11 #include "media/base/audio_bus.h" |
12 #include "media/cast/cast_environment.h" | 12 #include "media/cast/cast_environment.h" |
13 #include "media/cast/constants.h" | 13 #include "media/cast/constants.h" |
14 #include "media/cast/net/cast_transport_config.h" | 14 #include "media/cast/net/cast_transport_config.h" |
15 | 15 |
16 namespace media { | 16 namespace media { |
17 namespace cast { | 17 namespace cast { |
18 | 18 |
19 class AudioDecoder { | 19 class AudioDecoder { |
20 public: | 20 public: |
21 // Callback passed to DecodeFrame, to deliver decoded audio data from the | 21 // Callback passed to DecodeFrame, to deliver decoded audio data from the |
22 // decoder. The number of samples in |audio_bus| may vary, and |audio_bus| | 22 // decoder. The number of samples in |audio_bus| may vary, and |audio_bus| |
23 // can be NULL when errors occur. |is_continuous| is normally true, but will | 23 // can be NULL when errors occur. |is_continuous| is normally true, but will |
24 // be false if the decoder has detected a frame skip since the last decode | 24 // be false if the decoder has detected a frame skip since the last decode |
25 // operation; and the client should take steps to smooth audio discontinuities | 25 // operation; and the client should take steps to smooth audio discontinuities |
26 // in this case. | 26 // in this case. |
27 typedef base::Callback<void(scoped_ptr<AudioBus> audio_bus, | 27 typedef base::Callback<void(std::unique_ptr<AudioBus> audio_bus, |
28 bool is_continuous)> DecodeFrameCallback; | 28 bool is_continuous)> |
| 29 DecodeFrameCallback; |
29 | 30 |
30 AudioDecoder(const scoped_refptr<CastEnvironment>& cast_environment, | 31 AudioDecoder(const scoped_refptr<CastEnvironment>& cast_environment, |
31 int channels, | 32 int channels, |
32 int sampling_rate, | 33 int sampling_rate, |
33 Codec codec); | 34 Codec codec); |
34 virtual ~AudioDecoder(); | 35 virtual ~AudioDecoder(); |
35 | 36 |
36 // Returns STATUS_INITIALIZED if the decoder was successfully constructed. If | 37 // Returns STATUS_INITIALIZED if the decoder was successfully constructed. If |
37 // this method returns any other value, calls to DecodeFrame() will not | 38 // this method returns any other value, calls to DecodeFrame() will not |
38 // succeed. | 39 // succeed. |
39 OperationalStatus InitializationResult() const; | 40 OperationalStatus InitializationResult() const; |
40 | 41 |
41 // Decode the payload in |encoded_frame| asynchronously. |callback| will be | 42 // Decode the payload in |encoded_frame| asynchronously. |callback| will be |
42 // invoked on the CastEnvironment::MAIN thread with the result. | 43 // invoked on the CastEnvironment::MAIN thread with the result. |
43 // | 44 // |
44 // In the normal case, |encoded_frame->frame_id| will be | 45 // In the normal case, |encoded_frame->frame_id| will be |
45 // monotonically-increasing by 1 for each successive call to this method. | 46 // monotonically-increasing by 1 for each successive call to this method. |
46 // When it is not, the decoder will assume one or more frames have been | 47 // When it is not, the decoder will assume one or more frames have been |
47 // dropped (e.g., due to packet loss), and will perform recovery actions. | 48 // dropped (e.g., due to packet loss), and will perform recovery actions. |
48 void DecodeFrame(scoped_ptr<EncodedFrame> encoded_frame, | 49 void DecodeFrame(std::unique_ptr<EncodedFrame> encoded_frame, |
49 const DecodeFrameCallback& callback); | 50 const DecodeFrameCallback& callback); |
50 | 51 |
51 private: | 52 private: |
52 class ImplBase; | 53 class ImplBase; |
53 class OpusImpl; | 54 class OpusImpl; |
54 class Pcm16Impl; | 55 class Pcm16Impl; |
55 | 56 |
56 const scoped_refptr<CastEnvironment> cast_environment_; | 57 const scoped_refptr<CastEnvironment> cast_environment_; |
57 scoped_refptr<ImplBase> impl_; | 58 scoped_refptr<ImplBase> impl_; |
58 | 59 |
59 DISALLOW_COPY_AND_ASSIGN(AudioDecoder); | 60 DISALLOW_COPY_AND_ASSIGN(AudioDecoder); |
60 }; | 61 }; |
61 | 62 |
62 } // namespace cast | 63 } // namespace cast |
63 } // namespace media | 64 } // namespace media |
64 | 65 |
65 #endif // MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ | 66 #endif // MEDIA_CAST_RECEIVER_AUDIO_DECODER_H_ |
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