使用SDL2和stb_vorbis使音频audio啪作响

时间:2018-06-20 09:50:55

标签: c++ sdl sdl-2 oggvorbis

在我正在研究的项目中,我想使用stb_vorbis来传输ogg文件中的音频。但是,在执行了执行此操作的过程之后,我发现音频声音不清晰。我觉得问题可能类似于this question,但我看不出问题可能出在哪里。

这是我的代码:

#include <SDL2/SDL.h>
#include <stb/vorbis.h>
#include <iostream>

void sdlAudioCallback(void* userData, Uint8* stream, int len)
{
    stb_vorbis* myVorbis = (stb_vorbis*) userData;
    SDL_memset(stream, 0, len);
    stb_vorbis_get_frame_short_interleaved(myVorbis, 2, (short*) stream, len/sizeof(short));
}

int main()
{
    if (SDL_Init(SDL_INIT_AUDIO) != 0)
        return -1;

    int error = 0;
    stb_vorbis_alloc* alloc;
    stb_vorbis* vorbis = stb_vorbis_open_filename("res/thingy.ogg", &error, alloc);

    if (error != 0) 
        return -2;

    stb_vorbis_info info = stb_vorbis_get_info(vorbis);

    SDL_AudioSpec spec;
    spec.freq = info.sample_rate;
    spec.format = AUDIO_S16;
    spec.channels = 2;
    spec.samples = 1024;
    spec.callback = sdlAudioCallback;
    spec.userdata = vorbis;

    if (SDL_OpenAudio(&spec, NULL) < 0) {
        std::cout << "failed to open audio device: " << SDL_GetError() << std::endl;
        SDL_Quit();
        return -3;
    }

    SDL_PauseAudio(0);
    SDL_Delay(5000);
}

更多信息:
somethingy.ogg来自Sean Barrett's samples
在OSX机器上使用g ++构建

0 个答案:

没有答案