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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_FAKE_AUDIO_RENDER_CALLBACK_H_ | 5 #ifndef MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_ |
6 #define MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_ | 6 #define MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include "base/macros.h" | 10 #include "base/macros.h" |
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23 public: | 23 public: |
24 // The function used to fulfill Render() is f(x) = sin(2 * PI * x * |step|), | 24 // The function used to fulfill Render() is f(x) = sin(2 * PI * x * |step|), |
25 // where x = [|number_of_frames| * m, |number_of_frames| * (m + 1)] and m = | 25 // where x = [|number_of_frames| * m, |number_of_frames| * (m + 1)] and m = |
26 // the number of Render() calls fulfilled thus far. | 26 // the number of Render() calls fulfilled thus far. |
27 explicit FakeAudioRenderCallback(double step); | 27 explicit FakeAudioRenderCallback(double step); |
28 ~FakeAudioRenderCallback() override; | 28 ~FakeAudioRenderCallback() override; |
29 | 29 |
30 // Renders a sine wave into the provided audio data buffer. If |half_fill_| | 30 // Renders a sine wave into the provided audio data buffer. If |half_fill_| |
31 // is set, will only fill half the buffer. | 31 // is set, will only fill half the buffer. |
32 int Render(AudioBus* audio_bus, | 32 int Render(AudioBus* audio_bus, |
33 uint32_t audio_delay_milliseconds, | 33 uint32_t frames_delayed, |
34 uint32_t frames_skipped) override; | 34 uint32_t frames_skipped) override; |
35 MOCK_METHOD0(OnRenderError, void()); | 35 MOCK_METHOD0(OnRenderError, void()); |
36 | 36 |
37 // AudioTransform::ProvideAudioTransformInput implementation. | 37 // AudioTransform::ProvideAudioTransformInput implementation. |
38 double ProvideInput(AudioBus* audio_bus, | 38 double ProvideInput(AudioBus* audio_bus, uint32_t frames_delayed) override; |
39 base::TimeDelta buffer_delay) override; | |
40 | 39 |
41 // Toggles only filling half the requested amount during Render(). | 40 // Toggles only filling half the requested amount during Render(). |
42 void set_half_fill(bool half_fill) { half_fill_ = half_fill; } | 41 void set_half_fill(bool half_fill) { half_fill_ = half_fill; } |
43 | 42 |
44 // Reset the sine state to initial value. | 43 // Reset the sine state to initial value. |
45 void reset() { x_ = 0; } | 44 void reset() { x_ = 0; } |
46 | 45 |
47 // Returns the last |audio_delay_milliseconds| provided to Render() or -1 if | 46 // Returns the last |frames_delayed| provided to Render() or -1 if |
48 // no Render() call occurred. | 47 // no Render() call occurred. |
49 int last_audio_delay_milliseconds() const { | 48 int last_frames_delayed() const { return last_frames_delayed_; } |
50 return last_audio_delay_milliseconds_; | |
51 } | |
52 | 49 |
53 // Set volume information used by ProvideAudioTransformInput(). | 50 // Set volume information used by ProvideAudioTransformInput(). |
54 void set_volume(double volume) { volume_ = volume; } | 51 void set_volume(double volume) { volume_ = volume; } |
55 | 52 |
56 int last_channel_count() const { return last_channel_count_; } | 53 int last_channel_count() const { return last_channel_count_; } |
57 | 54 |
58 private: | 55 private: |
59 bool half_fill_; | 56 bool half_fill_; |
60 double x_; | 57 double x_; |
61 double step_; | 58 double step_; |
62 int last_audio_delay_milliseconds_; | 59 int last_frames_delayed_; |
63 int last_channel_count_; | 60 int last_channel_count_; |
64 double volume_; | 61 double volume_; |
65 | 62 |
66 DISALLOW_COPY_AND_ASSIGN(FakeAudioRenderCallback); | 63 DISALLOW_COPY_AND_ASSIGN(FakeAudioRenderCallback); |
67 }; | 64 }; |
68 | 65 |
69 } // namespace media | 66 } // namespace media |
70 | 67 |
71 #endif // MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_ | 68 #endif // MEDIA_BASE_FAKE_AUDIO_RENDER_CALLBACK_H_ |
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