1 files changed, 47 insertions, 0 deletions
diff --git a/src/sound/sdl_s.cpp b/src/sound/sdl_s.cpp
new file mode 100644
index 000000000..4b1da52d6
--- /dev/null
+++ b/src/sound/sdl_s.cpp
@@ -0,0 +1,47 @@
+/* $Id$ */
+
+#include "../stdafx.h"
+
+#ifdef WITH_SDL
+
+#include "../openttd.h"
+#include "../driver.h"
+#include "../mixer.h"
+#include "../sdl.h"
+#include "sdl_s.h"
+#include <SDL.h>
+
+static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
+{
+	MxMixSamples(stream, len / 4);
+}
+
+static const char *SdlSoundStart(const char * const *parm)
+{
+	SDL_AudioSpec spec;
+
+	const char *s = SdlOpen(SDL_INIT_AUDIO);
+	if (s != NULL) return s;
+
+	spec.freq = GetDriverParamInt(parm, "hz", 11025);
+	spec.format = AUDIO_S16SYS;
+	spec.channels = 2;
+	spec.samples = 512;
+	spec.callback = fill_sound_buffer;
+	SDL_CALL SDL_OpenAudio(&spec, &spec);
+	SDL_CALL SDL_PauseAudio(0);
+	return NULL;
+}
+
+static void SdlSoundStop(void)
+{
+	SDL_CALL SDL_CloseAudio();
+	SdlClose(SDL_INIT_AUDIO);
+}
+
+const HalSoundDriver _sdl_sound_driver = {
+	SdlSoundStart,
+	SdlSoundStop,
+};
+
+#endif