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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 // Creates a unified stream based on the cras (ChromeOS audio server) interface. | 5 // Creates a unified stream based on the cras (ChromeOS audio server) interface. |
6 // | 6 // |
7 // CrasUnifiedStream object is *not* thread-safe and should only be used | 7 // CrasUnifiedStream object is *not* thread-safe and should only be used |
8 // from the audio thread. | 8 // from the audio thread. |
9 | 9 |
10 #ifndef MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_ | 10 #ifndef MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_ |
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38 // Implementation of AudioOutputStream. | 38 // Implementation of AudioOutputStream. |
39 bool Open() override; | 39 bool Open() override; |
40 void Close() override; | 40 void Close() override; |
41 void Start(AudioSourceCallback* callback) override; | 41 void Start(AudioSourceCallback* callback) override; |
42 void Stop() override; | 42 void Stop() override; |
43 void SetVolume(double volume) override; | 43 void SetVolume(double volume) override; |
44 void GetVolume(double* volume) override; | 44 void GetVolume(double* volume) override; |
45 | 45 |
46 private: | 46 private: |
47 // Convert Latency in time to bytes. | 47 // Convert Latency in time to bytes. |
48 uint32 GetBytesLatency(const struct timespec& latency); | 48 uint32_t GetBytesLatency(const struct timespec& latency); |
49 | 49 |
50 // Handles captured audio and fills the ouput with audio to be played. | 50 // Handles captured audio and fills the ouput with audio to be played. |
51 static int UnifiedCallback(cras_client* client, | 51 static int UnifiedCallback(cras_client* client, |
52 cras_stream_id_t stream_id, | 52 cras_stream_id_t stream_id, |
53 uint8* input_samples, | 53 uint8_t* input_samples, |
54 uint8* output_samples, | 54 uint8_t* output_samples, |
55 unsigned int frames, | 55 unsigned int frames, |
56 const timespec* input_ts, | 56 const timespec* input_ts, |
57 const timespec* output_ts, | 57 const timespec* output_ts, |
58 void* arg); | 58 void* arg); |
59 | 59 |
60 // Handles notification that there was an error with the playback stream. | 60 // Handles notification that there was an error with the playback stream. |
61 static int StreamError(cras_client* client, | 61 static int StreamError(cras_client* client, |
62 cras_stream_id_t stream_id, | 62 cras_stream_id_t stream_id, |
63 int err, | 63 int err, |
64 void* arg); | 64 void* arg); |
65 | 65 |
66 // Chooses the correct audio callback based on stream direction. | 66 // Chooses the correct audio callback based on stream direction. |
67 uint32 DispatchCallback(size_t frames, | 67 uint32_t DispatchCallback(size_t frames, |
68 uint8* input_samples, | 68 uint8_t* input_samples, |
69 uint8* output_samples, | 69 uint8_t* output_samples, |
70 const timespec* input_ts, | 70 const timespec* input_ts, |
71 const timespec* output_ts); | 71 const timespec* output_ts); |
72 | 72 |
73 // Writes audio for a playback stream. | 73 // Writes audio for a playback stream. |
74 uint32 WriteAudio(size_t frames, uint8* buffer, const timespec* sample_ts); | 74 uint32_t WriteAudio(size_t frames, |
| 75 uint8_t* buffer, |
| 76 const timespec* sample_ts); |
75 | 77 |
76 // Deals with an error that occured in the stream. Called from StreamError(). | 78 // Deals with an error that occured in the stream. Called from StreamError(). |
77 void NotifyStreamError(int err); | 79 void NotifyStreamError(int err); |
78 | 80 |
79 // The client used to communicate with the audio server. | 81 // The client used to communicate with the audio server. |
80 cras_client* client_; | 82 cras_client* client_; |
81 | 83 |
82 // ID of the playing stream. | 84 // ID of the playing stream. |
83 cras_stream_id_t stream_id_; | 85 cras_stream_id_t stream_id_; |
84 | 86 |
85 // PCM parameters for the stream. | 87 // PCM parameters for the stream. |
86 AudioParameters params_; | 88 AudioParameters params_; |
87 | 89 |
88 // Size of frame in bytes. | 90 // Size of frame in bytes. |
89 uint32 bytes_per_frame_; | 91 uint32_t bytes_per_frame_; |
90 | 92 |
91 // True if stream is playing. | 93 // True if stream is playing. |
92 bool is_playing_; | 94 bool is_playing_; |
93 | 95 |
94 // Volume level from 0.0 to 1.0. | 96 // Volume level from 0.0 to 1.0. |
95 float volume_; | 97 float volume_; |
96 | 98 |
97 // Audio manager that created us. Used to report that we've been closed. | 99 // Audio manager that created us. Used to report that we've been closed. |
98 AudioManagerCras* manager_; | 100 AudioManagerCras* manager_; |
99 | 101 |
100 // Callback to get audio samples. | 102 // Callback to get audio samples. |
101 AudioSourceCallback* source_callback_; | 103 AudioSourceCallback* source_callback_; |
102 | 104 |
103 // Container for exchanging data with AudioSourceCallback::OnMoreData(). | 105 // Container for exchanging data with AudioSourceCallback::OnMoreData(). |
104 scoped_ptr<AudioBus> output_bus_; | 106 scoped_ptr<AudioBus> output_bus_; |
105 | 107 |
106 // Direciton of the stream. | 108 // Direciton of the stream. |
107 CRAS_STREAM_DIRECTION stream_direction_; | 109 CRAS_STREAM_DIRECTION stream_direction_; |
108 | 110 |
109 DISALLOW_COPY_AND_ASSIGN(CrasUnifiedStream); | 111 DISALLOW_COPY_AND_ASSIGN(CrasUnifiedStream); |
110 }; | 112 }; |
111 | 113 |
112 } // namespace media | 114 } // namespace media |
113 | 115 |
114 #endif // MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_ | 116 #endif // MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_ |
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