OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSORS_GOVERNOR_SHLIB_H_ | |
6 #define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSORS_GOVERNOR_SHLIB_H_ | |
7 | |
8 #include <memory> | |
9 #include <vector> | |
10 | |
11 #include "base/macros.h" | |
12 #include "chromecast/public/media/audio_post_processor_shlib.h" | |
13 | |
14 namespace chromecast { | |
15 namespace media { | |
16 | |
17 class SlewVolume; | |
18 | |
19 // Provides a flat reduction in output volume if the input volume is above a | |
20 // given threshold. | |
21 // Used to protect speakers at high output levels | |
22 // while providing dyanmic range at low output level. | |
23 // The configuration string for this plugin is: | |
24 // {"onset_volume": |VOLUME_TO_CLAMP|, "clamp_multiplier": |CLAMP_MULTIPLIER|} | |
25 // Input volumes > |VOLUME_TO_CLAMP| will be attenuated by |CLAMP_MULTIPLIER|. | |
26 class Governor : public AudioPostProcessor { | |
27 public: | |
28 Governor(const std::string& config, int channels); | |
29 ~Governor() override; | |
30 | |
bcf
2017/05/04 03:45:06
// AudioPostProcessor implementation:
Add overrid
bshaya
2017/05/04 18:15:41
Done.
| |
31 bool SetSampleRate(int sample_rate) override; | |
32 int ProcessFrames(const std::vector<float*>& data, | |
33 int frames, | |
34 float volume) override; | |
35 int GetRingingTimeInFrames() override; | |
36 | |
37 void SetSlewTimeMsForTest(int slew_time_ms); | |
38 | |
39 private: | |
40 float GetGovernorMultiplier(); | |
41 | |
42 int channels_; | |
43 int sample_rate_; | |
44 float volume_; | |
45 double onset_volume_; | |
46 double clamp_multiplier_; | |
47 std::unique_ptr<SlewVolume> slew_volume_; | |
bcf
2017/05/04 03:45:06
ptr necessary? Can we just have SlewVolume inside?
bshaya
2017/05/04 18:15:41
Done.
| |
48 DISALLOW_COPY_AND_ASSIGN(Governor); | |
49 }; | |
50 | |
51 } // namespace media | |
52 } // namespace chromecast | |
53 | |
54 #endif // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSORS_GOVERNOR_SHLIB_H_ | |
OLD | NEW |