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diff --git a/src/libretro/libretro.c b/src/libretro/libretro.c
index bf0ed70..d51b9f0 100644
--- a/src/libretro/libretro.c
+++ b/src/libretro/libretro.c
@@ -65,6 +65,9 @@ int update_audio_latency = false;
int should_skip_frame = 0;
+static int sample_rate = 32000;
+static int stereo_enabled = true;
+
int game_index = -1;
unsigned short *gp2x_screen15;
int thread_done = 0;
@@ -272,6 +275,27 @@ static void update_variables(bool first_run)
else
global_showinfo = 0;
+ var.value = NULL;
+ var.key = "mame2000-sample_rate";
+
+ sample_rate = 32000;
+
+ if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
+ sample_rate = strtol(var.value, NULL, 10);
+
+ var.value = NULL;
+ var.key = "mame2000-stereo";
+
+ if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
+ {
+ if(strcmp(var.value, "enabled") == 0)
+ stereo_enabled = true;
+ else
+ stereo_enabled = false;
+ }
+ else
+ stereo_enabled = true;
+
/* Reinitialise frameskipping, if required */
if (!first_run &&
((frameskip_type != prev_frameskip_type)))
@@ -286,6 +310,8 @@ void retro_set_environment(retro_environment_t cb)
{ "mame2000-frameskip_interval", "Frameskip Interval; 1|2|3|4|5|6|7|8|9" },
{ "mame2000-skip_disclaimer", "Skip Disclaimer; enabled|disabled" },
{ "mame2000-show_gameinfo", "Show Game Information; disabled|enabled" },
+ { "mame2000-sample_rate", "Audio Rate (Restart); 32000|11025|22050|32000|44100" },
+ { "mame2000-stereo", "Stereo (Restart); enabled|disabled" },
{ NULL, NULL },
};
environ_cb = cb;
@@ -643,7 +669,7 @@ void retro_get_system_av_info(struct retro_system_av_info *info)
};
struct retro_system_timing t = {
Machine->drv->frames_per_second,
- 32000.0
+ (double)Machine->sample_rate
};
info->timing = t;
info->geometry = g;
@@ -881,8 +907,9 @@ bool retro_load_game(const struct retro_game_info *info)
i=create_path_recursive(cheatdir);
if(i!=0)printf("error %d creating cheat \"%s\"\n", i,cheatdir);
- Machine->sample_rate = 32000;
- options.samplerate = 32000;
+ Machine->sample_rate = sample_rate;
+ options.samplerate = sample_rate;
+ usestereo = stereo_enabled;
/* This is needed so emulated YM3526/YM3812 chips are used instead on physical ones. */
options.use_emulated_ym3812 = 1;
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