(svn r2688) MSVC and Watcom can't handle identical file names in different directories, oh my...

sound/sdl_s.c

@@ -0,0 +1,40 @@
+#include "stdafx.h"
+#include "openttd.h"
+#include "driver.h"
+#include "mixer.h"
+#include "sdl.h"
+#include "sound/sdl_s.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,
+};