1 files changed, 101 insertions, 0 deletions
diff --git a/audiotest.cpp b/audiotest.cpp
new file mode 100644
index 0000000..f6b5a92
--- /dev/null
+++ b/audiotest.cpp
@@ -0,0 +1,101 @@
+//emcc -o test.html main.cpp -O2 -s USE_SDL=2
+
+#include <stdlib.h>
+
+#if defined(_MSC_VER)
+#include "SDL.h"
+#else
+#include "SDL2/SDL.h"
+#endif
+
+#include <math.h>
+#include <stdio.h>
+
+#ifdef __EMSCRIPTEN__
+#include "emscripten.h"
+#endif
+
+
+
+void audiomixer(void *userdata, Uint8 *stream, int len)
+{
+    int samples = len / 4;
+    short *buf = (short*)stream;
+
+    int i;
+    for (i = 0; i < samples*2; i++)
+    {
+        buf[i] = i * 655;
+    }
+}
+
+int sdlstatic_init(unsigned int aSamplerate, unsigned int aBuffer)
+{
+    SDL_AudioSpec as;
+    as.freq = aSamplerate;
+    as.format = AUDIO_S16;
+    as.channels = 2;
+    as.samples = aBuffer;
+    as.callback = audiomixer;
+
+    SDL_AudioSpec as2;
+    if (SDL_OpenAudio(&as, &as2) < 0)
+    {
+        return -1;
+    }
+
+    SDL_PauseAudio(0);
+
+    return 0;
+}   
+
+void mainloop()
+{
+    // Poll for events, and handle the ones we care about.
+    SDL_Event event;
+    while (SDL_PollEvent(&event)) 
+    {
+        switch (event.type) 
+        {
+        case SDL_KEYUP:
+            // If escape is pressed, return (and thus, quit)
+            switch (event.key.keysym.sym)
+            {
+            case SDLK_ESCAPE:
+                {
+                    exit(0);
+                }
+                break;
+            }
+            break;
+        case SDL_QUIT:
+            SDL_CloseAudio();
+            exit(0);
+        }
+    }
+}
+
+int main(int argc, char *argv[])
+{   
+    printf("SDL INIT OK\n");
+    if ( SDL_Init(SDL_INIT_EVERYTHING) < 0 ) 
+    {
+        fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
+        exit(1);
+    }   
+    printf("SDL INIT OK\n");
+
+    atexit(SDL_Quit);   
+
+    sdlstatic_init(44100, 1024);
+
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(mainloop, 60, 0);
+#else
+    while (1)
+    {
+        mainloop();
+    }
+#endif
+    return 0;
+}