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-rw-r--r--sound/sdl.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/sound/sdl.c b/sound/sdl.c
new file mode 100644
index 000000000..2f227ad39
--- /dev/null
+++ b/sound/sdl.c
@@ -0,0 +1,40 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "driver.h"
+#include "mixer.h"
+#include "sdl.h"
+#include "sound/sdl.h"
+#include <SDL.h>
+
+static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
+{
+ MxMixSamples(_mixer, 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,
+};