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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_SIMPLE_SOURCES_H_ | 5 #ifndef MEDIA_AUDIO_SIMPLE_SOURCES_H_ |
6 #define MEDIA_AUDIO_SIMPLE_SOURCES_H_ | 6 #define MEDIA_AUDIO_SIMPLE_SOURCES_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <memory> | 10 #include <memory> |
11 | 11 |
12 #include "base/files/file_path.h" | 12 #include "base/files/file_path.h" |
13 #include "base/synchronization/lock.h" | 13 #include "base/synchronization/lock.h" |
| 14 #include "base/time/time.h" |
14 #include "media/audio/audio_io.h" | 15 #include "media/audio/audio_io.h" |
15 #include "media/base/audio_converter.h" | 16 #include "media/base/audio_converter.h" |
16 #include "media/base/seekable_buffer.h" | 17 #include "media/base/seekable_buffer.h" |
17 | 18 |
18 namespace media { | 19 namespace media { |
19 | 20 |
20 class WavAudioHandler; | 21 class WavAudioHandler; |
21 | 22 |
22 // An audio source that produces a pure sinusoidal tone. | 23 // An audio source that produces a pure sinusoidal tone. |
23 class MEDIA_EXPORT SineWaveAudioSource | 24 class MEDIA_EXPORT SineWaveAudioSource |
24 : public AudioOutputStream::AudioSourceCallback { | 25 : public AudioOutputStream::AudioSourceCallback { |
25 public: | 26 public: |
26 // |channels| is the number of audio channels, |freq| is the frequency in | 27 // |channels| is the number of audio channels, |freq| is the frequency in |
27 // hertz and it has to be less than half of the sampling frequency | 28 // hertz and it has to be less than half of the sampling frequency |
28 // |sample_freq| or else you will get aliasing. | 29 // |sample_freq| or else you will get aliasing. |
29 SineWaveAudioSource(int channels, double freq, double sample_freq); | 30 SineWaveAudioSource(int channels, double freq, double sample_freq); |
30 ~SineWaveAudioSource() override; | 31 ~SineWaveAudioSource() override; |
31 | 32 |
32 // Return up to |cap| samples of data via OnMoreData(). Use Reset() to | 33 // Return up to |cap| samples of data via OnMoreData(). Use Reset() to |
33 // allow more data to be served. | 34 // allow more data to be served. |
34 void CapSamples(int cap); | 35 void CapSamples(int cap); |
35 void Reset(); | 36 void Reset(); |
36 | 37 |
37 // Implementation of AudioSourceCallback. | 38 // Implementation of AudioSourceCallback. |
38 int OnMoreData(AudioBus* audio_bus, | 39 int OnMoreData(AudioBus* audio_bus, |
39 uint32_t total_bytes_delay, | 40 uint32_t total_bytes_delay, |
| 41 base::TimeDelta delay_timestamp, |
40 uint32_t frames_skipped) override; | 42 uint32_t frames_skipped) override; |
41 void OnError(AudioOutputStream* stream) override; | 43 void OnError(AudioOutputStream* stream) override; |
42 | 44 |
43 // The number of OnMoreData() and OnError() calls respectively. | 45 // The number of OnMoreData() and OnError() calls respectively. |
44 int callbacks() { return callbacks_; } | 46 int callbacks() { return callbacks_; } |
45 int errors() { return errors_; } | 47 int errors() { return errors_; } |
46 | 48 |
47 protected: | 49 protected: |
48 int channels_; | 50 int channels_; |
49 double f_; | 51 double f_; |
50 int time_state_; | 52 int time_state_; |
51 int cap_; | 53 int cap_; |
52 int callbacks_; | 54 int callbacks_; |
53 int errors_; | 55 int errors_; |
54 base::Lock time_lock_; | 56 base::Lock time_lock_; |
55 }; | 57 }; |
56 | 58 |
57 class MEDIA_EXPORT FileSource : public AudioOutputStream::AudioSourceCallback, | 59 class MEDIA_EXPORT FileSource : public AudioOutputStream::AudioSourceCallback, |
58 public AudioConverter::InputCallback { | 60 public AudioConverter::InputCallback { |
59 public: | 61 public: |
60 FileSource(const AudioParameters& params, | 62 FileSource(const AudioParameters& params, |
61 const base::FilePath& path_to_wav_file, | 63 const base::FilePath& path_to_wav_file, |
62 bool loop); | 64 bool loop); |
63 ~FileSource() override; | 65 ~FileSource() override; |
64 | 66 |
65 // Implementation of AudioSourceCallback. | 67 // Implementation of AudioSourceCallback. |
66 int OnMoreData(AudioBus* audio_bus, | 68 int OnMoreData(AudioBus* audio_bus, |
67 uint32_t total_bytes_delay, | 69 uint32_t total_bytes_delay, |
| 70 base::TimeDelta delay_timestamp, |
68 uint32_t frames_skipped) override; | 71 uint32_t frames_skipped) override; |
69 void OnError(AudioOutputStream* stream) override; | 72 void OnError(AudioOutputStream* stream) override; |
70 | 73 |
71 private: | 74 private: |
72 AudioParameters params_; | 75 AudioParameters params_; |
73 base::FilePath path_to_wav_file_; | 76 base::FilePath path_to_wav_file_; |
74 | 77 |
75 // The WAV data at |path_to_wav_file_| is read into memory and kept here. | 78 // The WAV data at |path_to_wav_file_| is read into memory and kept here. |
76 // This memory needs to survive for the lifetime of |wav_audio_handler_|, | 79 // This memory needs to survive for the lifetime of |wav_audio_handler_|, |
77 // so declare it first. Do not access this member directly. | 80 // so declare it first. Do not access this member directly. |
(...skipping 10 matching lines...) Expand all Loading... |
88 | 91 |
89 // Loads the wav file on the first OnMoreData invocation. | 92 // Loads the wav file on the first OnMoreData invocation. |
90 void LoadWavFile(const base::FilePath& path_to_wav_file); | 93 void LoadWavFile(const base::FilePath& path_to_wav_file); |
91 | 94 |
92 // Rewinds the player to the start of the loaded wav file. | 95 // Rewinds the player to the start of the loaded wav file. |
93 void Rewind(); | 96 void Rewind(); |
94 }; | 97 }; |
95 | 98 |
96 class BeepingSource : public AudioOutputStream::AudioSourceCallback { | 99 class BeepingSource : public AudioOutputStream::AudioSourceCallback { |
97 public: | 100 public: |
98 BeepingSource(const AudioParameters& params); | 101 explicit BeepingSource(const AudioParameters& params); |
99 ~BeepingSource() override; | 102 ~BeepingSource() override; |
100 | 103 |
101 // Implementation of AudioSourceCallback. | 104 // Implementation of AudioSourceCallback. |
102 int OnMoreData(AudioBus* audio_bus, | 105 int OnMoreData(AudioBus* audio_bus, |
103 uint32_t total_bytes_delay, | 106 uint32_t total_bytes_delay, |
| 107 base::TimeDelta delay_timestamp, |
104 uint32_t frames_skipped) override; | 108 uint32_t frames_skipped) override; |
105 void OnError(AudioOutputStream* stream) override; | 109 void OnError(AudioOutputStream* stream) override; |
106 | 110 |
107 static void BeepOnce(); | 111 static void BeepOnce(); |
108 private: | 112 private: |
109 int buffer_size_; | 113 int buffer_size_; |
110 std::unique_ptr<uint8_t[]> buffer_; | 114 std::unique_ptr<uint8_t[]> buffer_; |
111 AudioParameters params_; | 115 AudioParameters params_; |
112 base::TimeTicks last_callback_time_; | 116 base::TimeTicks last_callback_time_; |
113 base::TimeDelta interval_from_last_beep_; | 117 base::TimeDelta interval_from_last_beep_; |
114 int beep_duration_in_buffers_; | 118 int beep_duration_in_buffers_; |
115 int beep_generated_in_buffers_; | 119 int beep_generated_in_buffers_; |
116 int beep_period_in_frames_; | 120 int beep_period_in_frames_; |
117 }; | 121 }; |
118 | 122 |
119 } // namespace media | 123 } // namespace media |
120 | 124 |
121 #endif // MEDIA_AUDIO_SIMPLE_SOURCES_H_ | 125 #endif // MEDIA_AUDIO_SIMPLE_SOURCES_H_ |
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