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1 // Copyright (c) 2011 The Native Client 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 AUDIO_PLAYER_H_ | |
6 #define AUDIO_PLAYER_H_ | |
7 | |
8 #include "experimental/conways_life/threading/pthread_ext.h" | |
9 #include "experimental/conways_life/web_resource_loader.h" | |
10 #include "ppapi/cpp/completion_callback.h" | |
11 | |
12 namespace pp { | |
13 class Audio; | |
14 class Instance; | |
15 } | |
16 | |
17 namespace audio { | |
18 | |
19 class AudioSource; | |
20 | |
21 // Play audio from various audio sources. Usage: | |
22 // | |
23 // AudioPlayer player(instance); | |
24 // AudioSource* source = <create an sudio source> | |
25 // player.AssignAudioSource(source); | |
26 // player.Play(); | |
27 class AudioPlayer { | |
28 public: | |
29 explicit AudioPlayer(pp::Instance* instance); | |
30 ~AudioPlayer(); | |
31 | |
32 // Assign an audio source to this player. The player owns the audio source and | |
33 // is responsible for deleting it when done. Returns true if successful, and | |
34 // false otherwise (e.g. the source is not playable through this player). | |
35 void AssignAudioSource(AudioSource* source); | |
36 | |
37 // Play audio from the sound source. This is an asynchronous call that returns | |
38 // immediately. Fails silently if the sound source is not ready. | |
39 void Play(); | |
40 // Stop playing. | |
41 void Stop(); | |
42 | |
43 // Indicates whether this player instance can play a sound. | |
44 bool IsReady() const; | |
45 | |
46 private: | |
47 // Disallow copy and assigment. | |
48 AudioPlayer(const AudioPlayer&); | |
49 AudioPlayer& operator=(const AudioPlayer&); | |
50 | |
51 // Pepper audio callback function. | |
52 static void AudioCallback(void* sample_buffer, | |
53 uint32_t buffer_size_in_bytes, | |
54 void* user_data); | |
55 | |
56 // Internal versions of Play/Stop that only run on the main thread. | |
57 void InternalPlay(int32_t result); | |
58 void InternalStop(int32_t result); | |
59 | |
60 // Clear (delete) the audio objects. | |
61 void ClearAudioSource(); | |
62 void ClearPepperAudio(); | |
63 // Create the pepper audio for the given sopurce. Return true on success. | |
64 bool CreatePepperAudio(); | |
65 | |
66 AudioSource* audio_source_; | |
67 size_t playback_offset_; | |
68 pp::Audio* pp_audio_; | |
69 pp::Instance* instance_; // Weak reference. | |
70 | |
71 pp::CompletionCallbackFactory<AudioPlayer, threading::RefCount> factory_; | |
72 pthread_mutex_t mutex_; | |
73 }; | |
74 | |
75 } // namespace audio | |
76 #endif // AUDIO_PLAYER_H_ | |
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