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Side by Side Diff: ppapi/examples/audio/audio.cc

Issue 6279003: Move ppapi audio interface out of dev, but... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years, 11 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2010 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 #include <cmath> 5 #include <cmath>
6 #include <limits> 6 #include <limits>
7 7
8 #include "ppapi/cpp/dev/audio_dev.h" 8 #include "ppapi/c/pp_errors.h"
9 #include "ppapi/cpp/dev/audio_config_dev.h" 9 #include "ppapi/cpp/audio.h"
10 #include "ppapi/cpp/audio_config.h"
11 #include "ppapi/cpp/completion_callback.h"
10 #include "ppapi/cpp/instance.h" 12 #include "ppapi/cpp/instance.h"
11 #include "ppapi/cpp/module.h" 13 #include "ppapi/cpp/module.h"
12 14
13 // Separate left and right frequency to make sure we didn't swap L & R. 15 // Separate left and right frequency to make sure we didn't swap L & R.
14 // Sounds pretty horrible, though... 16 // Sounds pretty horrible, though...
15 const double frequency_l = 400; 17 const double frequency_l = 400;
16 const double frequency_r = 1000; 18 const double frequency_r = 1000;
17 19
18 // This sample frequency is guaranteed to work. 20 // This sample frequency is guaranteed to work.
19 const PP_AudioSampleRate_Dev sample_frequency = PP_AUDIOSAMPLERATE_44100; 21 const PP_AudioSampleRate sample_frequency = PP_AUDIOSAMPLERATE_44100;
20 const uint32_t sample_count = 4096; 22 const uint32_t sample_count = 4096;
21 uint32_t obtained_sample_count = 0; 23 uint32_t obtained_sample_count = 0;
22 24
23 const double kPi = 3.141592653589; 25 const double kPi = 3.141592653589;
24 const double kTwoPi = 2.0 * kPi; 26 const double kTwoPi = 2.0 * kPi;
25 27
26 class MyInstance : public pp::Instance { 28 class MyInstance : public pp::Instance {
27 public: 29 public:
28 explicit MyInstance(PP_Instance instance) 30 explicit MyInstance(PP_Instance instance)
29 : pp::Instance(instance), 31 : pp::Instance(instance),
30 audio_wave_l_(0.0), 32 audio_wave_l_(0.0),
31 audio_wave_r_(0.0) { 33 audio_wave_r_(0.0) {
32 } 34 }
33 35
34 virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) { 36 virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
35 pp::AudioConfig_Dev config; 37 pp::AudioConfig config;
36 obtained_sample_count = pp::AudioConfig_Dev::RecommendSampleFrameCount( 38 obtained_sample_count = pp::AudioConfig::RecommendSampleFrameCount(
37 sample_count); 39 sample_frequency, sample_count);
38 config = pp::AudioConfig_Dev(this, sample_frequency, obtained_sample_count); 40 config = pp::AudioConfig(this, sample_frequency, obtained_sample_count);
39 audio_ = pp::Audio_Dev(this, config, SineWaveCallback, this); 41 audio_ = pp::Audio(this, config, SineWaveCallback, this);
40 return audio_.StartPlayback(); 42 return audio_.StartPlayback();
41 } 43 }
42 44
43 private: 45 private:
44 static void SineWaveCallback(void* samples, size_t num_bytes, void* thiz) { 46 static void SineWaveCallback(void* samples, size_t num_bytes, void* thiz) {
45 const double delta_l = kTwoPi * frequency_l / sample_frequency; 47 const double delta_l = kTwoPi * frequency_l / sample_frequency;
46 const double delta_r = kTwoPi * frequency_r / sample_frequency; 48 const double delta_r = kTwoPi * frequency_r / sample_frequency;
47 49
48 // Use per channel audio wave value to avoid clicks on buffer boundries. 50 // Use per channel audio wave value to avoid clicks on buffer boundries.
49 double wave_l = reinterpret_cast<MyInstance*>(thiz)->audio_wave_l_; 51 double wave_l = reinterpret_cast<MyInstance*>(thiz)->audio_wave_l_;
(...skipping 10 matching lines...) Expand all
60 wave_r += delta_r; 62 wave_r += delta_r;
61 if (wave_r > kTwoPi) 63 if (wave_r > kTwoPi)
62 wave_r -= kTwoPi * 2.0; 64 wave_r -= kTwoPi * 2.0;
63 } 65 }
64 // Store current value to use as starting point for next callback. 66 // Store current value to use as starting point for next callback.
65 reinterpret_cast<MyInstance*>(thiz)->audio_wave_l_ = wave_l; 67 reinterpret_cast<MyInstance*>(thiz)->audio_wave_l_ = wave_l;
66 reinterpret_cast<MyInstance*>(thiz)->audio_wave_r_ = wave_r; 68 reinterpret_cast<MyInstance*>(thiz)->audio_wave_r_ = wave_r;
67 } 69 }
68 70
69 // Audio resource. Allocated in Init(), freed on destruction. 71 // Audio resource. Allocated in Init(), freed on destruction.
70 pp::Audio_Dev audio_; 72 pp::Audio audio_;
71 73
72 // Current audio wave position, used to prevent sine wave skips 74 // Current audio wave position, used to prevent sine wave skips
73 // on buffer boundaries. 75 // on buffer boundaries.
74 double audio_wave_l_; 76 double audio_wave_l_;
75 double audio_wave_r_; 77 double audio_wave_r_;
76 }; 78 };
77 79
78 class MyModule : public pp::Module { 80 class MyModule : public pp::Module {
79 public: 81 public:
80 // Override CreateInstance to create your customized Instance object. 82 // Override CreateInstance to create your customized Instance object.
81 virtual pp::Instance* CreateInstance(PP_Instance instance) { 83 virtual pp::Instance* CreateInstance(PP_Instance instance) {
82 return new MyInstance(instance); 84 return new MyInstance(instance);
83 } 85 }
84 }; 86 };
85 87
86 namespace pp { 88 namespace pp {
87 89
88 // Factory function for your specialization of the Module object. 90 // Factory function for your specialization of the Module object.
89 Module* CreateModule() { 91 Module* CreateModule() {
90 return new MyModule(); 92 return new MyModule();
91 } 93 }
92 94
93 } // namespace pp 95 } // namespace pp
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