+static void retro_audio_buff_status_cb(
+ bool active, unsigned occupancy, bool underrun_likely)
+{
+ retro_audio_buff_active = active;
+ retro_audio_buff_occupancy = occupancy;
+ retro_audio_buff_underrun = underrun_likely;
+}
+
+static void retro_set_audio_buff_status_cb(void)
+{
+ if (frameskip_type > 0)
+ {
+ struct retro_audio_buffer_status_callback buf_status_cb;
+
+ buf_status_cb.callback = retro_audio_buff_status_cb;
+ if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
+ &buf_status_cb))
+ {
+ retro_audio_buff_active = false;
+ retro_audio_buff_occupancy = 0;
+ retro_audio_buff_underrun = false;
+ retro_audio_latency = 0;
+ }
+ else
+ {
+ /* Frameskip is enabled - increase frontend
+ * audio latency to minimise potential
+ * buffer underruns */
+ uint32_t frame_time_usec = 1000000.0 / (is_pal_mode ? 50.0 : 60.0);
+
+ /* Set latency to 6x current frame time... */
+ retro_audio_latency = (unsigned)(6 * frame_time_usec / 1000);
+
+ /* ...then round up to nearest multiple of 32 */
+ retro_audio_latency = (retro_audio_latency + 0x1F) & ~0x1F;
+ }
+ }
+ else
+ {
+ environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
+ retro_audio_latency = 0;
+ }
+
+ update_audio_latency = true;
+}
+