diff options
Diffstat (limited to 'src/libjin/audio/SDL/sdl_audio.cpp')
| -rw-r--r-- | src/libjin/audio/SDL/sdl_audio.cpp | 256 |
1 files changed, 128 insertions, 128 deletions
diff --git a/src/libjin/audio/SDL/sdl_audio.cpp b/src/libjin/audio/SDL/sdl_audio.cpp index 4c4bcc2..1592599 100644 --- a/src/libjin/audio/SDL/sdl_audio.cpp +++ b/src/libjin/audio/SDL/sdl_audio.cpp @@ -13,134 +13,134 @@ using namespace JinEngine::Math; namespace JinEngine { - namespace Audio - { - namespace SDL - { - - /* עcallbackƵ̵߳ */ - static void defaultCallback(void *userdata, Uint8 *stream, int size) - { - static SDLAudio* audio = static_cast<SDLAudio*>(userdata); - if (!audio->goOnProcess()) - return; - audio->lock(); - audio->processCommands(); - audio->processSources(stream, size); - audio->processBuffer(stream, size); - audio->unlock(); - } - - /*call only once*/ bool SDLAudio::startSystem(const SettingBase* s) - { - jin_log_info("Initialize audio system."); - - if (SDL_Init(SDL_INIT_AUDIO) < 0) - return false; - - SDL_AudioSpec spec; - Setting* setting = (Setting*)s; - if (setting == nullptr) - return false; - - unsigned int samplerate = setting->samplerate; - unsigned int samples = clamp<int>(setting->samples, 1, setting->samplerate); - - spec.freq = samplerate; // ÿsample,õ 11025, 22050, 44100 and 48000 Hz. - spec.format = AUDIO_S16SYS; // signed 16-bit samples in native byte order - spec.channels = SDLAUDIO_CHANNELS; // - spec.samples = samples; // ÿβʱһã=setting->samplerateÿֻ1 - spec.userdata = this; - spec.callback = defaultCallback; - - audioDevice = SDL_OpenAudioDevice(NULL, 0, &spec, NULL, 0); - if (audioDevice == 0) - return false; - /* start audio */ - SDL_PauseAudioDevice(audioDevice, 0); - return true; - } - - /*call only once*/ void SDLAudio::quitSystem() - { - jin_log_info("Quit audio system."); - SDL_CloseAudio(); - } - - void SDLAudio::lock() - { - SDL_LockAudioDevice(audioDevice); - } - - void SDLAudio::unlock() - { - SDL_UnlockAudioDevice(audioDevice); - } - - bool SDLAudio::goOnProcess() - { - if (state == SDLAudio::State::STOP) - { - SDLSourceManager::get()->removeAllSource(); - pause(); - return false; - } - else if (state == SDLAudio::State::PAUSE) - return false; - else - return true; - } - - void SDLAudio::processCommands() - { - SDLSourceManager::get()->processCommands(); - } - - void SDLAudio::processSources(void* buffer, size_t len) - { - SDLSourceManager::get()->processSources(buffer, len); - } - - void SDLAudio::processBuffer(void* buff, size_t len) - { - short* buffer = (short*)buff; - int samples = (len / SDLAUDIO_BYTEDEPTH) >> 1; // ˫ - const char L = 0, R = 1; - for (int i = 0; i < samples; ++i) - { - short* clip = buffer + (i << 1); - clip[L] *= volume; - clip[R] *= volume; - } - } - - void SDLAudio::play() - { - state = State::PLAY; - } - - void SDLAudio::stop() - { - state = State::STOP; - } - - void SDLAudio::pause() - { - state = State::PAUSE; - } - - void SDLAudio::resume() - { - state = State::PLAY; - } - - void SDLAudio::setVolume(float volume) - { - this->volume = clamp(volume, 0.0f, 1.0f); - } - - } // namespace SDL - } // namespace Audio + namespace Audio + { + namespace SDL + { + + /* עcallbackƵ̵߳ */ + static void defaultCallback(void *userdata, Uint8 *stream, int size) + { + static SDLAudio* audio = static_cast<SDLAudio*>(userdata); + if (!audio->goOnProcess()) + return; + audio->lock(); + audio->processCommands(); + audio->processSources(stream, size); + audio->processBuffer(stream, size); + audio->unlock(); + } + + /*call only once*/ bool SDLAudio::startSystem(const SettingBase* s) + { + jin_log_info("Initialize audio system."); + + if (SDL_Init(SDL_INIT_AUDIO) < 0) + return false; + + SDL_AudioSpec spec; + Setting* setting = (Setting*)s; + if (setting == nullptr) + return false; + + unsigned int samplerate = setting->samplerate; + unsigned int samples = clamp<int>(setting->samples, 1, setting->samplerate); + + spec.freq = samplerate; // ÿsample,õ 11025, 22050, 44100 and 48000 Hz. + spec.format = AUDIO_S16SYS; // signed 16-bit samples in native byte order + spec.channels = SDLAUDIO_CHANNELS; // + spec.samples = samples; // ÿβʱһã=setting->samplerateÿֻ1 + spec.userdata = this; + spec.callback = defaultCallback; + + audioDevice = SDL_OpenAudioDevice(NULL, 0, &spec, NULL, 0); + if (audioDevice == 0) + return false; + /* start audio */ + SDL_PauseAudioDevice(audioDevice, 0); + return true; + } + + /*call only once*/ void SDLAudio::quitSystem() + { + jin_log_info("Quit audio system."); + SDL_CloseAudio(); + } + + void SDLAudio::lock() + { + SDL_LockAudioDevice(audioDevice); + } + + void SDLAudio::unlock() + { + SDL_UnlockAudioDevice(audioDevice); + } + + bool SDLAudio::goOnProcess() + { + if (state == SDLAudio::State::STOP) + { + SDLSourceManager::get()->removeAllSource(); + pause(); + return false; + } + else if (state == SDLAudio::State::PAUSE) + return false; + else + return true; + } + + void SDLAudio::processCommands() + { + SDLSourceManager::get()->processCommands(); + } + + void SDLAudio::processSources(void* buffer, size_t len) + { + SDLSourceManager::get()->processSources(buffer, len); + } + + void SDLAudio::processBuffer(void* buff, size_t len) + { + short* buffer = (short*)buff; + int samples = (len / SDLAUDIO_BYTEDEPTH) >> 1; // ˫ + const char L = 0, R = 1; + for (int i = 0; i < samples; ++i) + { + short* clip = buffer + (i << 1); + clip[L] *= volume; + clip[R] *= volume; + } + } + + void SDLAudio::play() + { + state = State::PLAY; + } + + void SDLAudio::stop() + { + state = State::STOP; + } + + void SDLAudio::pause() + { + state = State::PAUSE; + } + + void SDLAudio::resume() + { + state = State::PLAY; + } + + void SDLAudio::setVolume(float volume) + { + this->volume = clamp(volume, 0.0f, 1.0f); + } + + } // namespace SDL + } // namespace Audio } // namespace JinEngine #endif // (jin_audio) && (jin_audio == jin_audio_sdl)
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