Support SDL_AUDIODRIVER set to "dsound", which was used by SDL 1.2 Fixes https://github.com/libsdl-org/SDL/issues/5818
diff --git a/src/audio/SDL_audio.c b/src/audio/SDL_audio.c
index 8cabcd9..0ce2ae6 100644
--- a/src/audio/SDL_audio.c
+++ b/src/audio/SDL_audio.c
@@ -945,6 +945,15 @@ SDL_AudioInit(const char *driver_name)
const char *driver_attempt_end = SDL_strchr(driver_attempt, ',');
size_t driver_attempt_len = (driver_attempt_end != NULL) ? (driver_attempt_end - driver_attempt)
: SDL_strlen(driver_attempt);
+#if SDL_AUDIO_DRIVER_DSOUND
+ /* SDL 1.2 uses the name "dsound", so we'll support both. */
+ if (driver_attempt_len == SDL_strlen("dsound") &&
+ (SDL_strncasecmp(driver_attempt, "dsound", driver_attempt_len) == 0)) {
+ driver_attempt = "directsound";
+ driver_attempt_len = SDL_strlen("directsound");
+ }
+#endif
+
#if SDL_AUDIO_DRIVER_PULSEAUDIO
/* SDL 1.2 uses the name "pulse", so we'll support both. */
if (driver_attempt_len == SDL_strlen("pulse") &&