SDL2 audio record test

diff --git a/c/SDL2_record_audio/main.c b/c/SDL2_record_audio/main.c
new file mode 100644 (file)
index 0000000..b442782
--- /dev/null
+++ b/c/SDL2_record_audio/main.c
@@ -0,0 +1,44 @@
+//gcc -Wextra -pedantic-errors -o main.out main.c -lSDL2
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <SDL2/SDL.h>
+
+
+void SDL_AudioCallbacks(void* userdata, Uint8* stream, int len) {
+       printf("%d\n", (int)*((int *)stream) );
+}
+
+int main(void) {
+       SDL_AudioSpec want, have;
+       SDL_AudioDeviceID dev;
+
+       SDL_memset(&want, 0, sizeof(want)); /* or SDL_zero(want) */
+       want.freq = 48000;
+       want.format = AUDIO_F32;
+       want.channels = 2; //1,2,4,6
+       want.samples = 4096;
+       want.callback = SDL_AudioCallbacks; /* you wrote this function elsewhere -- see SDL_AudioSpec for details */
+       //want.userdata = NULL;
+
+       if((SDL_Init(SDL_INIT_AUDIO)==-1)) {
+               printf("Could not initialize SDL: %s.\n", SDL_GetError());
+               exit(-1);
+       }
+
+       dev = SDL_OpenAudioDevice(NULL, 1, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+       if (dev == 0) {
+               SDL_Log("Failed to open audio: %s", SDL_GetError());
+       } else {
+               if (have.format != want.format) { /* we let this one thing change. */
+                       SDL_Log("We didn't get Float32 audio format.");
+               }
+               SDL_PauseAudioDevice(dev, 0); /* start audio playing. */
+               SDL_Delay(5000); /* let the audio callback play some sound for 5 seconds. */
+               SDL_CloseAudioDevice(dev);
+       }
+
+    return EXIT_SUCCESS;
+}