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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_AUDIO_CRAS_CRAS_INPUT_H_ | 5 #ifndef MEDIA_AUDIO_CRAS_CRAS_INPUT_H_ |
| 6 #define MEDIA_AUDIO_CRAS_CRAS_INPUT_H_ | 6 #define MEDIA_AUDIO_CRAS_CRAS_INPUT_H_ |
| 7 | 7 |
| 8 #include <cras_client.h> | 8 #include <cras_client.h> |
| 9 | 9 |
| 10 #include <string> | 10 #include <string> |
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| 42 double GetMaxVolume() override; | 42 double GetMaxVolume() override; |
| 43 void SetVolume(double volume) override; | 43 void SetVolume(double volume) override; |
| 44 double GetVolume() override; | 44 double GetVolume() override; |
| 45 bool IsMuted() override; | 45 bool IsMuted() override; |
| 46 | 46 |
| 47 private: | 47 private: |
| 48 // Handles requests to get samples from the provided buffer. This will be | 48 // Handles requests to get samples from the provided buffer. This will be |
| 49 // called by the audio server when it has samples ready. | 49 // called by the audio server when it has samples ready. |
| 50 static int SamplesReady(cras_client* client, | 50 static int SamplesReady(cras_client* client, |
| 51 cras_stream_id_t stream_id, | 51 cras_stream_id_t stream_id, |
| 52 uint8* samples, | 52 uint8_t* samples, |
| 53 size_t frames, | 53 size_t frames, |
| 54 const timespec* sample_ts, | 54 const timespec* sample_ts, |
| 55 void* arg); | 55 void* arg); |
| 56 | 56 |
| 57 // Handles notification that there was an error with the playback stream. | 57 // Handles notification that there was an error with the playback stream. |
| 58 static int StreamError(cras_client* client, | 58 static int StreamError(cras_client* client, |
| 59 cras_stream_id_t stream_id, | 59 cras_stream_id_t stream_id, |
| 60 int err, | 60 int err, |
| 61 void* arg); | 61 void* arg); |
| 62 | 62 |
| 63 // Reads one or more buffers of audio from the device, passes on to the | 63 // Reads one or more buffers of audio from the device, passes on to the |
| 64 // registered callback. Called from SamplesReady(). | 64 // registered callback. Called from SamplesReady(). |
| 65 void ReadAudio(size_t frames, uint8* buffer, const timespec* sample_ts); | 65 void ReadAudio(size_t frames, uint8_t* buffer, const timespec* sample_ts); |
| 66 | 66 |
| 67 // Deals with an error that occured in the stream. Called from StreamError(). | 67 // Deals with an error that occured in the stream. Called from StreamError(). |
| 68 void NotifyStreamError(int err); | 68 void NotifyStreamError(int err); |
| 69 | 69 |
| 70 // Convert from dB * 100 to a volume ratio. | 70 // Convert from dB * 100 to a volume ratio. |
| 71 double GetVolumeRatioFromDecibels(double dB) const; | 71 double GetVolumeRatioFromDecibels(double dB) const; |
| 72 | 72 |
| 73 // Convert from a volume ratio to dB. | 73 // Convert from a volume ratio to dB. |
| 74 double GetDecibelsFromVolumeRatio(double volume_ratio) const; | 74 double GetDecibelsFromVolumeRatio(double volume_ratio) const; |
| 75 | 75 |
| 76 // Non-refcounted pointer back to the audio manager. | 76 // Non-refcounted pointer back to the audio manager. |
| 77 // The AudioManager indirectly holds on to stream objects, so we don't | 77 // The AudioManager indirectly holds on to stream objects, so we don't |
| 78 // want circular references. Additionally, stream objects live on the audio | 78 // want circular references. Additionally, stream objects live on the audio |
| 79 // thread, which is owned by the audio manager and we don't want to addref | 79 // thread, which is owned by the audio manager and we don't want to addref |
| 80 // the manager from that thread. | 80 // the manager from that thread. |
| 81 AudioManagerCras* const audio_manager_; | 81 AudioManagerCras* const audio_manager_; |
| 82 | 82 |
| 83 // Size of frame in bytes. | 83 // Size of frame in bytes. |
| 84 uint32 bytes_per_frame_; | 84 uint32_t bytes_per_frame_; |
| 85 | 85 |
| 86 // Callback to pass audio samples too, valid while recording. | 86 // Callback to pass audio samples too, valid while recording. |
| 87 AudioInputCallback* callback_; | 87 AudioInputCallback* callback_; |
| 88 | 88 |
| 89 // The client used to communicate with the audio server. | 89 // The client used to communicate with the audio server. |
| 90 cras_client* client_; | 90 cras_client* client_; |
| 91 | 91 |
| 92 // PCM parameters for the stream. | 92 // PCM parameters for the stream. |
| 93 const AudioParameters params_; | 93 const AudioParameters params_; |
| 94 | 94 |
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| 108 bool is_loopback_; | 108 bool is_loopback_; |
| 109 | 109 |
| 110 scoped_ptr<AudioBus> audio_bus_; | 110 scoped_ptr<AudioBus> audio_bus_; |
| 111 | 111 |
| 112 DISALLOW_COPY_AND_ASSIGN(CrasInputStream); | 112 DISALLOW_COPY_AND_ASSIGN(CrasInputStream); |
| 113 }; | 113 }; |
| 114 | 114 |
| 115 } // namespace media | 115 } // namespace media |
| 116 | 116 |
| 117 #endif // MEDIA_AUDIO_CRAS_CRAS_INPUT_H_ | 117 #endif // MEDIA_AUDIO_CRAS_CRAS_INPUT_H_ |
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