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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_BASE_AUDIO_RENDERER_H_ | 5 #ifndef MEDIA_BASE_AUDIO_RENDERER_H_ |
| 6 #define MEDIA_BASE_AUDIO_RENDERER_H_ | 6 #define MEDIA_BASE_AUDIO_RENDERER_H_ |
| 7 | 7 |
| 8 #include "base/callback.h" | 8 #include "base/callback.h" |
| 9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
| 10 #include "media/base/buffering_state.h" | 10 #include "media/base/buffering_state.h" |
| 11 #include "media/base/decryptor.h" | 11 #include "media/base/cdm_context.h" |
| 12 #include "media/base/media_export.h" | 12 #include "media/base/media_export.h" |
| 13 #include "media/base/pipeline_status.h" | 13 #include "media/base/pipeline_status.h" |
| 14 | 14 |
| 15 namespace media { | 15 namespace media { |
| 16 | 16 |
| 17 class DemuxerStream; | 17 class DemuxerStream; |
| 18 class TimeSource; | 18 class TimeSource; |
| 19 | 19 |
| 20 class MEDIA_EXPORT AudioRenderer { | 20 class MEDIA_EXPORT AudioRenderer { |
| 21 public: | 21 public: |
| 22 AudioRenderer(); | 22 AudioRenderer(); |
| 23 | 23 |
| 24 // Stop all operations and fire all pending callbacks. | 24 // Stop all operations and fire all pending callbacks. |
| 25 virtual ~AudioRenderer(); | 25 virtual ~AudioRenderer(); |
| 26 | 26 |
| 27 // Initialize an AudioRenderer with |stream|, executing |init_cb| upon | 27 // Initialize an AudioRenderer with |stream|, executing |init_cb| upon |
| 28 // completion. If initialization fails, only |init_cb| (not |error_cb|) will | 28 // completion. If initialization fails, only |init_cb| (not |error_cb|) will |
| 29 // be called. | 29 // be called. |
| 30 // | 30 // |
| 31 // |set_decryptor_ready_cb| is fired when a Decryptor is needed, i.e. when the | 31 // |set_cdm_ready_cb| is fired when a CDM is needed, i.e. when the |stream| is |
| 32 // |stream| is encrypted. | 32 // encrypted. |
| 33 // | 33 // |
| 34 // |statistics_cb| is executed periodically with audio rendering stats. | 34 // |statistics_cb| is executed periodically with audio rendering stats. |
| 35 // | 35 // |
| 36 // |buffering_state_cb| is executed when audio rendering has either run out of | 36 // |buffering_state_cb| is executed when audio rendering has either run out of |
| 37 // data or has enough data to continue playback. | 37 // data or has enough data to continue playback. |
| 38 // | 38 // |
| 39 // |ended_cb| is executed when audio rendering has reached the end of stream. | 39 // |ended_cb| is executed when audio rendering has reached the end of stream. |
| 40 // | 40 // |
| 41 // |error_cb| is executed if an error was encountered after initialization. | 41 // |error_cb| is executed if an error was encountered after initialization. |
| 42 // | 42 // |
| 43 // |waiting_for_decryption_key_cb| is called whenever the key needed to | 43 // |waiting_for_decryption_key_cb| is called whenever the key needed to |
| 44 // decrypt the stream is not available. | 44 // decrypt the stream is not available. |
| 45 virtual void Initialize( | 45 virtual void Initialize( |
| 46 DemuxerStream* stream, | 46 DemuxerStream* stream, |
| 47 const PipelineStatusCB& init_cb, | 47 const PipelineStatusCB& init_cb, |
| 48 const SetDecryptorReadyCB& set_decryptor_ready_cb, | 48 const SetCdmReadyCB& set_cdm_ready_cb, |
| 49 const StatisticsCB& statistics_cb, | 49 const StatisticsCB& statistics_cb, |
| 50 const BufferingStateCB& buffering_state_cb, | 50 const BufferingStateCB& buffering_state_cb, |
| 51 const base::Closure& ended_cb, | 51 const base::Closure& ended_cb, |
| 52 const PipelineStatusCB& error_cb, | 52 const PipelineStatusCB& error_cb, |
| 53 const base::Closure& waiting_for_decryption_key_cb) = 0; | 53 const base::Closure& waiting_for_decryption_key_cb) = 0; |
| 54 | 54 |
| 55 // Returns the TimeSource associated with audio rendering. | 55 // Returns the TimeSource associated with audio rendering. |
| 56 virtual TimeSource* GetTimeSource() = 0; | 56 virtual TimeSource* GetTimeSource() = 0; |
| 57 | 57 |
| 58 // Discard any audio data, executing |callback| when completed. | 58 // Discard any audio data, executing |callback| when completed. |
| (...skipping 10 matching lines...) Expand all Loading... |
| 69 // Sets the output volume. | 69 // Sets the output volume. |
| 70 virtual void SetVolume(float volume) = 0; | 70 virtual void SetVolume(float volume) = 0; |
| 71 | 71 |
| 72 private: | 72 private: |
| 73 DISALLOW_COPY_AND_ASSIGN(AudioRenderer); | 73 DISALLOW_COPY_AND_ASSIGN(AudioRenderer); |
| 74 }; | 74 }; |
| 75 | 75 |
| 76 } // namespace media | 76 } // namespace media |
| 77 | 77 |
| 78 #endif // MEDIA_BASE_AUDIO_RENDERER_H_ | 78 #endif // MEDIA_BASE_AUDIO_RENDERER_H_ |
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