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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ | 5 #ifndef CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ |
6 #define CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ | 6 #define CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ |
7 | 7 |
| 8 #include <memory> |
8 #include <vector> | 9 #include <vector> |
9 | 10 |
10 #include "base/callback.h" | 11 #include "base/callback.h" |
11 #include "base/macros.h" | 12 #include "base/macros.h" |
12 #include "base/threading/thread_checker.h" | 13 #include "base/threading/thread_checker.h" |
| 14 #include "base/time/time.h" |
13 #include "media/audio/audio_io.h" | 15 #include "media/audio/audio_io.h" |
14 #include "media/base/audio_converter.h" | 16 #include "media/base/audio_converter.h" |
15 #include "media/base/audio_parameters.h" | 17 #include "media/base/audio_parameters.h" |
16 | 18 |
17 namespace chromecast { | 19 namespace chromecast { |
18 namespace media { | 20 namespace media { |
19 | 21 |
20 class CastAudioManager; | 22 class CastAudioManager; |
21 class CastAudioOutputStream; | 23 class CastAudioOutputStream; |
22 | 24 |
23 // CastAudioMixer mixes multiple AudioOutputStreams and passes the mixed | 25 // CastAudioMixer mixes multiple AudioOutputStreams and passes the mixed |
24 // stream down to a single AudioOutputStream to be rendered by the CMA backend. | 26 // stream down to a single AudioOutputStream to be rendered by the CMA backend. |
25 class CastAudioMixer : public ::media::AudioOutputStream::AudioSourceCallback { | 27 class CastAudioMixer : public ::media::AudioOutputStream::AudioSourceCallback { |
26 public: | 28 public: |
27 using RealStreamFactory = base::Callback<::media::AudioOutputStream*( | 29 using RealStreamFactory = base::Callback<::media::AudioOutputStream*( |
28 const ::media::AudioParameters&)>; | 30 const ::media::AudioParameters&)>; |
29 | 31 |
30 CastAudioMixer(const RealStreamFactory& real_stream_factory); | 32 explicit CastAudioMixer(const RealStreamFactory& real_stream_factory); |
31 ~CastAudioMixer() override; | 33 ~CastAudioMixer() override; |
32 | 34 |
33 virtual ::media::AudioOutputStream* MakeStream( | 35 virtual ::media::AudioOutputStream* MakeStream( |
34 const ::media::AudioParameters& params, | 36 const ::media::AudioParameters& params, |
35 CastAudioManager* audio_manager); | 37 CastAudioManager* audio_manager); |
36 | 38 |
37 private: | 39 private: |
38 class MixerProxyStream; | 40 class MixerProxyStream; |
39 | 41 |
40 // ::media::AudioOutputStream::AudioSourceCallback implementation | 42 // ::media::AudioOutputStream::AudioSourceCallback implementation |
41 int OnMoreData(::media::AudioBus* dest, | 43 int OnMoreData(base::TimeDelta delay, |
42 uint32_t total_bytes_delay, | 44 base::TimeTicks delay_timestamp, |
43 uint32_t frames_skipped) override; | 45 int prior_frames_skipped, |
| 46 ::media::AudioBus* dest) override; |
| 47 |
44 void OnError(::media::AudioOutputStream* stream) override; | 48 void OnError(::media::AudioOutputStream* stream) override; |
45 | 49 |
46 // MixedAudioOutputStreams call Register on opening and AddInput on starting. | 50 // MixedAudioOutputStreams call Register on opening and AddInput on starting. |
47 bool Register(MixerProxyStream* proxy_stream); | 51 bool Register(MixerProxyStream* proxy_stream); |
48 void Unregister(MixerProxyStream* proxy_stream); | 52 void Unregister(MixerProxyStream* proxy_stream); |
49 void AddInput(::media::AudioConverter::InputCallback* input_callback); | 53 void AddInput(::media::AudioConverter::InputCallback* input_callback); |
50 void RemoveInput(::media::AudioConverter::InputCallback* input_callback); | 54 void RemoveInput(::media::AudioConverter::InputCallback* input_callback); |
51 | 55 |
52 base::ThreadChecker thread_checker_; | 56 base::ThreadChecker thread_checker_; |
53 std::unique_ptr<::media::AudioConverter> mixer_; | 57 std::unique_ptr<::media::AudioConverter> mixer_; |
54 bool error_; | 58 bool error_; |
55 | 59 |
56 const RealStreamFactory real_stream_factory_; | 60 const RealStreamFactory real_stream_factory_; |
57 ::media::AudioOutputStream* output_stream_; | 61 ::media::AudioOutputStream* output_stream_; |
58 ::media::AudioParameters output_params_; | 62 ::media::AudioParameters output_params_; |
59 | 63 |
60 std::vector<MixerProxyStream*> proxy_streams_; | 64 std::vector<MixerProxyStream*> proxy_streams_; |
61 | 65 |
62 DISALLOW_COPY_AND_ASSIGN(CastAudioMixer); | 66 DISALLOW_COPY_AND_ASSIGN(CastAudioMixer); |
63 }; | 67 }; |
64 | 68 |
65 } // namespace media | 69 } // namespace media |
66 } // namespace chromecast | 70 } // namespace chromecast |
67 | 71 |
68 #endif // CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ | 72 #endif // CHROMECAST_MEDIA_AUDIO_CAST_AUDIO_MIXER_H_ |
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