1 files changed, 58 insertions, 0 deletions
diff --git a/examples/sinewave.c b/examples/sinewave.c
new file mode 100755
index 0000000..6beed29
--- /dev/null
+++ b/examples/sinewave.c
@@ -0,0 +1,58 @@
+#if 0 /*
+#/  ================================================================
+#/
+#/    sinewave.c
+#/
+#/  ================================================================
+#/
+#/    Self-compilation shell script
+#/
+SRC=${0##*./}
+BIN=${SRC%.*}
+gcc                                 \
+  -Wall -Wextra -Werror -pedantic   \
+  -Wno-old-style-declaration        \
+  -Wno-missing-braces               \
+  -Wno-unused-variable              \
+  -Wno-unused-but-set-variable      \
+  -Wno-unused-parameter             \
+  -Wno-overlength-strings           \
+  -O3                               \
+  -fsanitize=undefined,address,leak \
+  -lX11 -lm -lasound                \
+  -o $BIN $SRC &&                   \
+  ./$BIN $@ && rm $BIN
+exit $? # */
+#endif
+
+#include "../reduced_system_layer.c"
+
+void update_and_render_frame(void) {
+  //  Nothing
+}
+
+i32 main(i32 argc, c8 **argv) {
+  (void) argc;
+  (void) argv;
+
+  platform.graceful_exit = 1;
+
+  f64 frequency = 440. * 4;
+
+  f32 frames[AUDIO_SAMPLE_RATE * AUDIO_NUM_CHANNELS];
+  for (i64 i = 0; i < AUDIO_SAMPLE_RATE; ++i) {
+    f64 t = ((f64) i) / AUDIO_SAMPLE_RATE;
+    f64 x = sin(t * frequency);
+    if (t < .1)
+      x *= t / .1;
+    if (t > .7)
+      x *= (1. - t) / .3;
+    frames[i * 2]     = (f32) x * .5;
+    frames[i * 2 + 1] = (f32) x * .5;
+  }
+
+  p_queue_sound(0, AUDIO_SAMPLE_RATE, frames);
+  p_handle_audio(AUDIO_SAMPLE_RATE);
+  p_cleanup();
+  return 0;
+}