SDL_OpenAudio函数

SDL_OpenAudio函数：

用此函数来打开音响设备。

int SDL_OpenAudio(SDL_AudioSpec* desired,
                  SDL_AudioSpec* obtained)

例子：

SDL_AudioSpec want, have;

SDL_memset(&want, 0, sizeof(want)); /* or SDL_zero(want) */
want.freq = 48000;
want.format = AUDIO_F32;
want.channels = 2;
want.samples = 4096;
want.callback = MyAudioCallback; /* you wrote this function elsewhere. */

if (SDL_OpenAudio(&want, &have) < 0) {
    SDL_Log("Failed to open audio: %s", SDL_GetError());
} else {
    if (have.format != want.format) {
        SDL_Log("We didn't get Float32 audio format.");
    }
    SDL_PauseAudio(0); /* start audio playing. */
    SDL_Delay(5000); /* let the audio callback play some sound for 5 seconds. */
    SDL_CloseAudio();
}

蔡军生

老蔡学堂