Removed unused VideoCaptureCapability parameters.
[chromium-blink-merge.git] / media / audio / android / opensles_output.h
blob7232d5da5f76210dee252f44946d141d075e19be
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
3 // found in the LICENSE file.
5 #ifndef MEDIA_AUDIO_ANDROID_OPENSLES_OUTPUT_H_
6 #define MEDIA_AUDIO_ANDROID_OPENSLES_OUTPUT_H_
8 #include <SLES/OpenSLES.h>
9 #include <SLES/OpenSLES_Android.h>
11 #include "base/compiler_specific.h"
12 #include "base/synchronization/lock.h"
13 #include "base/threading/thread_checker.h"
14 #include "media/audio/android/opensles_util.h"
15 #include "media/audio/audio_io.h"
16 #include "media/audio/audio_parameters.h"
18 namespace media {
20 class AudioManagerAndroid;
22 // Implements PCM audio output support for Android using the OpenSLES API.
23 // This class is created and lives on the Audio Manager thread but recorded
24 // audio buffers are given to us from an internal OpenSLES audio thread.
25 // All public methods should be called on the Audio Manager thread.
26 class OpenSLESOutputStream : public AudioOutputStream {
27 public:
28 static const int kMaxNumOfBuffersInQueue = 2;
30 OpenSLESOutputStream(AudioManagerAndroid* manager,
31 const AudioParameters& params);
33 virtual ~OpenSLESOutputStream();
35 // Implementation of AudioOutputStream.
36 virtual bool Open() OVERRIDE;
37 virtual void Close() OVERRIDE;
38 virtual void Start(AudioSourceCallback* callback) OVERRIDE;
39 virtual void Stop() OVERRIDE;
40 virtual void SetVolume(double volume) OVERRIDE;
41 virtual void GetVolume(double* volume) OVERRIDE;
43 private:
44 bool CreatePlayer();
46 // Called from OpenSLES specific audio worker thread.
47 static void SimpleBufferQueueCallback(
48 SLAndroidSimpleBufferQueueItf buffer_queue,
49 void* instance);
51 // Fills up one buffer by asking the registered source for data.
52 // Called from OpenSLES specific audio worker thread.
53 void FillBufferQueue();
55 // Called from the audio manager thread.
56 void FillBufferQueueNoLock();
58 // Called in Open();
59 void SetupAudioBuffer();
61 // Called in Close();
62 void ReleaseAudioBuffer();
64 // If OpenSLES reports an error this function handles it and passes it to
65 // the attached AudioOutputCallback::OnError().
66 void HandleError(SLresult error);
68 base::ThreadChecker thread_checker_;
70 // Protects |callback_|, |active_buffer_index_|, |audio_data_|,
71 // |buffer_size_bytes_| and |simple_buffer_queue_|.
72 base::Lock lock_;
74 AudioManagerAndroid* audio_manager_;
76 AudioSourceCallback* callback_;
78 // Shared engine interfaces for the app.
79 media::ScopedSLObjectItf engine_object_;
80 media::ScopedSLObjectItf player_object_;
81 media::ScopedSLObjectItf output_mixer_;
83 SLPlayItf player_;
85 // Buffer queue recorder interface.
86 SLAndroidSimpleBufferQueueItf simple_buffer_queue_;
88 SLDataFormat_PCM format_;
90 // Audio buffers that are allocated in the constructor based on
91 // info from audio parameters.
92 uint8* audio_data_[kMaxNumOfBuffersInQueue];
94 int active_buffer_index_;
95 size_t buffer_size_bytes_;
97 bool started_;
99 // Volume level from 0 to 1.
100 float volume_;
102 // Container for retrieving data from AudioSourceCallback::OnMoreData().
103 scoped_ptr<AudioBus> audio_bus_;
105 DISALLOW_COPY_AND_ASSIGN(OpenSLESOutputStream);
108 } // namespace media
110 #endif // MEDIA_AUDIO_ANDROID_OPENSLES_OUTPUT_H_