86 lines
1.9 KiB
C++
86 lines
1.9 KiB
C++
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_audio.h>
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#include <SDL2/SDL_image.h>
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#include <SDL2/SDL_ttf.h>
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using namespace std;
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SDL_AudioSpec want, have;
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SDL_AudioDeviceID player;
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void SDLCALL callback_player( void* userdata, Uint8* stream, int len)
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{
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for (int i = 0; i < len; i ++) {
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auto value = Uint8(sin(i) * 1000);
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stream[i] = value ;
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}
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}
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auto setupAudioPlayer()
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{
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printf("### Device Player ###\n");
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int num = SDL_GetNumAudioDevices(false);
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printf("num: %d\n", num);
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for (int i = 0; i < num; i++) {
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auto name = SDL_GetAudioDeviceName(i, false);
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printf("%d: %s\n", i, name);
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}
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int deviceIndex;
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printf("select device to player audio: ");
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scanf("%d", &deviceIndex);
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printf("\n");
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SDL_memset(&want, 0, sizeof(want)); /* or SDL_zero(want) */
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want.freq = 44100;
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want.format = AUDIO_F32;
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want.channels = 2;
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want.samples = 1024;
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want.callback = callback_player; // you wrote this function elsewhere.
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//want.size = 512;
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SDL_AudioDeviceID player = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(deviceIndex, false), SDL_FALSE, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
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if (player == 0) {
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printf("Failed to open player device! SDL Error: %s", SDL_GetError());
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} else {
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printf("freq %d \nformat %d \nchannels %d \nsamples %d\n", have.freq, have.format, have.channels, have.samples);
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}
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return player;
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}
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void destroyAudio()
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{
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SDL_CloseAudioDevice(player);
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SDL_Quit();
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}
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int main(int n, char** args)
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{
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int err = SDL_Init(SDL_INIT_AUDIO);
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printf("error: %d", err);
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if (err < 0) {
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printf("erorr: %d\n", err);
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printf("Failed to init audio! SDL Error: %s", SDL_GetError());
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}
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//recorder = setupAudioRecorder();
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auto player = setupAudioPlayer();
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printf("player: %d\n", player);
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//loadWave();
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printf("playing\n");
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//SDL_PauseAudioDevice(recorder, 0);
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SDL_PauseAudioDevice(player, 0);
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//SDL_SemWait(sem);
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SDL_Delay(10000);
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destroyAudio();
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//system("pause");
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return 0;
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}
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