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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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_FILTERS_DECRYPTING_AUDIO_DECODER_H_ | 5 #ifndef MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_ |
6 #define MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_ | 6 #define MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
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42 const SetDecryptorReadyCB& set_decryptor_ready_cb); | 42 const SetDecryptorReadyCB& set_decryptor_ready_cb); |
43 virtual ~DecryptingAudioDecoder(); | 43 virtual ~DecryptingAudioDecoder(); |
44 | 44 |
45 // AudioDecoder implementation. | 45 // AudioDecoder implementation. |
46 virtual void Initialize(const AudioDecoderConfig& config, | 46 virtual void Initialize(const AudioDecoderConfig& config, |
47 const PipelineStatusCB& status_cb, | 47 const PipelineStatusCB& status_cb, |
48 const OutputCB& output_cb) OVERRIDE; | 48 const OutputCB& output_cb) OVERRIDE; |
49 virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer, | 49 virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer, |
50 const DecodeCB& decode_cb) OVERRIDE; | 50 const DecodeCB& decode_cb) OVERRIDE; |
51 virtual void Reset(const base::Closure& closure) OVERRIDE; | 51 virtual void Reset(const base::Closure& closure) OVERRIDE; |
52 virtual void Stop() OVERRIDE; | |
53 | 52 |
54 private: | 53 private: |
55 // For a detailed state diagram please see this link: http://goo.gl/8jAok | 54 // For a detailed state diagram please see this link: http://goo.gl/8jAok |
56 // TODO(xhwang): Add a ASCII state diagram in this file after this class | 55 // TODO(xhwang): Add a ASCII state diagram in this file after this class |
57 // stabilizes. | 56 // stabilizes. |
58 // TODO(xhwang): Update this diagram for DecryptingAudioDecoder. | 57 // TODO(xhwang): Update this diagram for DecryptingAudioDecoder. |
59 enum State { | 58 enum State { |
60 kUninitialized = 0, | 59 kUninitialized = 0, |
61 kDecryptorRequested, | 60 kDecryptorRequested, |
62 kPendingDecoderInit, | 61 kPendingDecoderInit, |
63 kIdle, | 62 kIdle, |
64 kPendingDecode, | 63 kPendingDecode, |
65 kWaitingForKey, | 64 kWaitingForKey, |
66 kDecodeFinished, | 65 kDecodeFinished, |
67 kStopped, | 66 kError |
68 }; | 67 }; |
69 | 68 |
70 // Callback for DecryptorHost::RequestDecryptor(). | 69 // Callback for DecryptorHost::RequestDecryptor(). |
71 void SetDecryptor(Decryptor* decryptor); | 70 void SetDecryptor(Decryptor* decryptor); |
72 | 71 |
73 // Initializes the audio decoder on the |decryptor_| with |config_|. | 72 // Initializes the audio decoder on the |decryptor_| with |config_|. |
74 void InitializeDecoder(); | 73 void InitializeDecoder(); |
75 | 74 |
76 // Callback for Decryptor::InitializeAudioDecoder() during initialization. | 75 // Callback for Decryptor::InitializeAudioDecoder() during initialization. |
77 void FinishInitialization(bool success); | 76 void FinishInitialization(bool success); |
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94 void ProcessDecodedFrames(const Decryptor::AudioBuffers& frames); | 93 void ProcessDecodedFrames(const Decryptor::AudioBuffers& frames); |
95 | 94 |
96 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; | 95 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
97 | 96 |
98 State state_; | 97 State state_; |
99 | 98 |
100 PipelineStatusCB init_cb_; | 99 PipelineStatusCB init_cb_; |
101 OutputCB output_cb_; | 100 OutputCB output_cb_; |
102 DecodeCB decode_cb_; | 101 DecodeCB decode_cb_; |
103 base::Closure reset_cb_; | 102 base::Closure reset_cb_; |
104 base::Closure stop_cb_; | |
105 | 103 |
106 // The current decoder configuration. | 104 // The current decoder configuration. |
107 AudioDecoderConfig config_; | 105 AudioDecoderConfig config_; |
108 | 106 |
109 // Callback to request/cancel decryptor creation notification. | 107 // Callback to request/cancel decryptor creation notification. |
110 SetDecryptorReadyCB set_decryptor_ready_cb_; | 108 SetDecryptorReadyCB set_decryptor_ready_cb_; |
111 | 109 |
112 Decryptor* decryptor_; | 110 Decryptor* decryptor_; |
113 | 111 |
114 // The buffer that needs decrypting/decoding. | 112 // The buffer that needs decrypting/decoding. |
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126 // NOTE: Weak pointers must be invalidated before all other member variables. | 124 // NOTE: Weak pointers must be invalidated before all other member variables. |
127 base::WeakPtrFactory<DecryptingAudioDecoder> weak_factory_; | 125 base::WeakPtrFactory<DecryptingAudioDecoder> weak_factory_; |
128 base::WeakPtr<DecryptingAudioDecoder> weak_this_; | 126 base::WeakPtr<DecryptingAudioDecoder> weak_this_; |
129 | 127 |
130 DISALLOW_COPY_AND_ASSIGN(DecryptingAudioDecoder); | 128 DISALLOW_COPY_AND_ASSIGN(DecryptingAudioDecoder); |
131 }; | 129 }; |
132 | 130 |
133 } // namespace media | 131 } // namespace media |
134 | 132 |
135 #endif // MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_ | 133 #endif // MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_ |
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