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| 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. | |
| 4 // | |
| 5 | |
| 6 #include <stdint.h> | |
| 7 | |
| 8 #include <cmath> | |
| 9 #include <limits> | |
| 10 #include <string> | |
| 11 | |
| 12 #include "native_client/src/shared/platform/nacl_check.h" | |
| 13 #include "native_client/src/shared/platform/nacl_log.h" | |
| 14 | |
| 15 | |
| 16 #include "ppapi/c/pp_bool.h" | |
| 17 #include "ppapi/c/pp_errors.h" | |
| 18 #include "ppapi/c/ppb_audio.h" | |
| 19 #include "ppapi/c/ppb_audio_config.h" | |
| 20 #include "ppapi/cpp/audio.h" | |
| 21 #include "ppapi/cpp/audio_config.h" | |
| 22 #include "ppapi/cpp/completion_callback.h" | |
| 23 #include "ppapi/cpp/instance.h" | |
| 24 #include "ppapi/cpp/module.h" | |
| 25 | |
| 26 const PP_AudioSampleRate kSampleFrequency = PP_AUDIOSAMPLERATE_44100; | |
| 27 // Buffer size in units of sample frames. | |
| 28 // 4096 is a conservative size that should avoid underruns on most systems. | |
| 29 const uint32_t kSampleFrameCount = 4096; | |
| 30 const uint32_t kDefaultFrequency = 400; | |
| 31 const uint32_t kDefaultDuration = 10000; | |
| 32 | |
| 33 const int kNumChannelsForStereo = 2; | |
| 34 const size_t kSizeSingleSample = kNumChannelsForStereo * sizeof(int16_t); | |
| 35 | |
| 36 const double kPi = 3.141592653589; | |
| 37 const double kTwoPi = 2.0 * kPi; | |
| 38 | |
| 39 class MyInstance : public pp::Instance { | |
| 40 private: | |
| 41 pp::Audio audio_; | |
| 42 uint32_t obtained_sample_frame_count_; | |
| 43 double audio_wave_time_; // between -kTwoPi, +kTwoPi | |
| 44 uint32_t duration_; // in msec | |
| 45 uint32_t frequency_; | |
| 46 | |
| 47 static void SoundCallback(void* samples, uint32_t num_bytes, void* thiz) { | |
| 48 MyInstance* instance = reinterpret_cast<MyInstance*>(thiz); | |
| 49 // CHECK inside callback is only for testing purposes. | |
| 50 CHECK(instance->obtained_sample_frame_count_ * kSizeSingleSample == | |
| 51 num_bytes); | |
| 52 const double delta = kTwoPi * instance->frequency_ / kSampleFrequency; | |
| 53 const int16_t max_int16 = std::numeric_limits<int16_t>::max(); | |
| 54 int16_t* buf = reinterpret_cast<int16_t*>(samples); | |
| 55 for (size_t i = 0; i < instance->obtained_sample_frame_count_; ++i) { | |
| 56 const double v = sin(instance->audio_wave_time_) * max_int16; | |
| 57 *buf++ = static_cast<int16_t>(v); | |
| 58 *buf++ = static_cast<int16_t>(v); | |
| 59 // Add delta, keep within -kTwoPi, +TwoPi to preserve precision. | |
| 60 instance->audio_wave_time_ += delta; | |
| 61 if (instance->audio_wave_time_ > kTwoPi) | |
| 62 instance->audio_wave_time_ -= kTwoPi * 2.0; | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 static void StopOutput(void* thiz, int32_t err) { | |
| 67 if (PP_OK == err) { | |
| 68 MyInstance* instance = static_cast<MyInstance*>(thiz); | |
| 69 instance->audio_.StopPlayback(); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 void ExtraChecks(pp::AudioConfig* config) { | |
| 74 CHECK(obtained_sample_frame_count_ >= PP_AUDIOMINSAMPLEFRAMECOUNT); | |
| 75 CHECK(obtained_sample_frame_count_ <= PP_AUDIOMAXSAMPLEFRAMECOUNT); | |
| 76 | |
| 77 PPB_GetInterface get_browser_if = | |
| 78 pp::Module::Get()->get_browser_interface(); | |
| 79 | |
| 80 const PPB_AudioConfig* audio_config_if = | |
| 81 static_cast<const PPB_AudioConfig*>( | |
| 82 get_browser_if(PPB_AUDIO_CONFIG_INTERFACE)); | |
| 83 | |
| 84 const PPB_Audio* audio_if = | |
| 85 static_cast<const PPB_Audio*>( | |
| 86 get_browser_if(PPB_AUDIO_INTERFACE)); | |
| 87 | |
| 88 CHECK(NULL != audio_config_if); | |
| 89 CHECK(NULL != audio_if); | |
| 90 | |
| 91 const PP_Resource audio_config_res = config->pp_resource(); | |
| 92 const PP_Resource audio_res = audio_.pp_resource(); | |
| 93 | |
| 94 CHECK(PP_TRUE == audio_config_if->IsAudioConfig(audio_config_res)); | |
| 95 CHECK(PP_TRUE == audio_if->IsAudio(audio_res)); | |
| 96 CHECK(PP_FALSE == audio_config_if->IsAudioConfig(audio_res)); | |
| 97 CHECK(PP_FALSE == audio_if->IsAudio(audio_config_res)); | |
| 98 CHECK(audio_if->GetCurrentConfig(audio_res) == audio_config_res); | |
| 99 CHECK(0 == audio_if->GetCurrentConfig(audio_config_res)); | |
| 100 CHECK(audio_config_if->GetSampleRate(audio_config_res) == | |
| 101 config->sample_rate()); | |
| 102 CHECK(audio_config_if->GetSampleFrameCount(audio_config_res) == | |
| 103 config->sample_frame_count()); | |
| 104 CHECK(audio_.config().pp_resource() == audio_config_res); | |
| 105 } | |
| 106 | |
| 107 void ParseArgs(uint32_t argc, const char* argn[], const char* argv[]) { | |
| 108 for (uint32_t i = 0; i < argc; ++i) { | |
| 109 const std::string tag = argn[i]; | |
| 110 if (tag == "duration") duration_ = strtol(argv[i], 0, 0); | |
| 111 if (tag == "frequency") frequency_ = strtol(argv[i], 0, 0); | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 public: | |
| 116 explicit MyInstance(PP_Instance instance) | |
| 117 : pp::Instance(instance), | |
| 118 duration_(kDefaultDuration), frequency_(kDefaultFrequency) {} | |
| 119 | |
| 120 virtual ~MyInstance() {} | |
| 121 | |
| 122 virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) { | |
| 123 ParseArgs(argc, argn, argv); | |
| 124 obtained_sample_frame_count_ = pp::AudioConfig::RecommendSampleFrameCount( | |
| 125 kSampleFrequency, kSampleFrameCount); | |
| 126 | |
| 127 pp::AudioConfig config = | |
| 128 pp::AudioConfig(this, kSampleFrequency, obtained_sample_frame_count_); | |
| 129 | |
| 130 audio_ = pp::Audio(this, config, SoundCallback, this); | |
| 131 | |
| 132 ExtraChecks(&config); | |
| 133 | |
| 134 CHECK(audio_.StartPlayback()); | |
| 135 | |
| 136 pp::CompletionCallback cc(StopOutput, this); | |
| 137 pp::Module::Get()->core()->CallOnMainThread(duration_, cc, PP_OK); | |
| 138 return true; | |
| 139 } | |
| 140 }; | |
| 141 | |
| 142 // standard boilerplate code below | |
| 143 class MyModule : public pp::Module { | |
| 144 public: | |
| 145 virtual pp::Instance* CreateInstance(PP_Instance instance) { | |
| 146 return new MyInstance(instance); | |
| 147 } | |
| 148 }; | |
| 149 | |
| 150 namespace pp { | |
| 151 Module* CreateModule() { | |
| 152 return new MyModule(); | |
| 153 } | |
| 154 | |
| 155 } // namespace pp | |
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Chromium Code Reviews
Issue 11358131:
NaCl: remove dead tests and files from the SCons build. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src