Add audio_monitor.c files

Makefile.common

@@ -98,6 +98,7 @@ OBJ += frontend/frontend.o \
 		libretro-sdk/file/file_path.o \
 		hash.o \
 		audio/audio_driver.o \
+		audio/audio_monitor.o \
 		input/input_driver.o \
 		gfx/video_driver.o \
 		gfx/video_monitor.o \

audio/audio_monitor.c

@@ -0,0 +1,52 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2015 - Daniel De Matteis
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "audio_monitor.h"
+#include "../driver.h"
+#include "../general.h"
+#include "../retroarch.h"
+
+void audio_monitor_adjust_system_rates(void)
+{
+   float timing_skew;
+   const struct retro_system_timing *info = 
+      (const struct retro_system_timing*)&g_extern.system.av_info.timing;
+
+   if (info->sample_rate <= 0.0)
+      return;
+
+   timing_skew                 = fabs(1.0f - info->fps / 
+                                 g_settings.video.refresh_rate);
+   g_extern.audio_data.in_rate = info->sample_rate;
+
+   if (timing_skew <= g_settings.audio.max_timing_skew)
+      g_extern.audio_data.in_rate *= (g_settings.video.refresh_rate / info->fps);
+
+   RARCH_LOG("Set audio input rate to: %.2f Hz.\n",
+         g_extern.audio_data.in_rate);
+}
+
+/**
+ * audio_monitor_set_refresh_rate:
+ *
+ * Sets audio monitor refresh rate to new value.
+ **/
+void audio_monitor_set_refresh_rate(void)
+{
+   g_extern.audio_data.orig_src_ratio =
+      g_extern.audio_data.src_ratio =
+      (double)g_settings.audio.out_rate / g_extern.audio_data.in_rate;
+}

audio/audio_monitor.h

@@ -0,0 +1,39 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2015 - Daniel De Matteis
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __AUDIO_MONITOR_H
+#define __AUDIO_MONITOR_H
+
+#include <boolean.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void audio_monitor_adjust_system_rates(void);
+
+/**
+ * audio_monitor_set_refresh_rate:
+ *
+ * Sets audio monitor refresh rate to new value.
+ **/
+void audio_monitor_set_refresh_rate(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

driver.c

@@ -22,6 +22,7 @@
 #include "compat/posix_string.h"
 #include "gfx/video_thread_wrapper.h"
 #include "gfx/video_monitor.h"
+#include "audio/audio_monitor.h"
 #include "gfx/gfx_common.h"
 
 #ifdef HAVE_X11
@@ -205,6 +206,7 @@ void init_drivers_pre(void)
 
 void driver_adjust_system_rates(void)
 {
+   audio_monitor_adjust_system_rates();
    video_monitor_adjust_system_rates();
 }
 

gfx/video_monitor.c

@@ -15,6 +15,7 @@
  */
 
 #include "video_monitor.h"
+#include "../audio/audio_monitor.h"
 #include "../driver.h"
 #include "../general.h"
 #include "../retroarch.h"
@@ -27,7 +28,7 @@ void video_monitor_adjust_system_rates(void)
 
    g_extern.system.force_nonblock = false;
 
-   if (info->fps <= 0.0 || info->sample_rate <= 0.0)
+   if (info->fps <= 0.0)
       return;
 
    timing_skew = fabs(1.0f - info->fps / g_settings.video.refresh_rate);
@@ -46,15 +47,7 @@ void video_monitor_adjust_system_rates(void)
          g_extern.system.force_nonblock = true;
          RARCH_LOG("Game FPS > Monitor FPS. Cannot rely on VSync.\n");
       }
-
-      g_extern.audio_data.in_rate = info->sample_rate;
    }
-   else
-      g_extern.audio_data.in_rate = info->sample_rate *
-         (g_settings.video.refresh_rate / info->fps);
-
-   RARCH_LOG("Set audio input rate to: %.2f Hz.\n",
-         g_extern.audio_data.in_rate);
 
    if (!driver.video_data)
       return;
@@ -80,10 +73,7 @@ void video_monitor_set_refresh_rate(float hz)
 
    g_settings.video.refresh_rate = hz;
    driver_adjust_system_rates();
-
-   g_extern.audio_data.orig_src_ratio =
-      g_extern.audio_data.src_ratio =
-      (double)g_settings.audio.out_rate / g_extern.audio_data.in_rate;
+   audio_monitor_set_refresh_rate();
 }
 
 /**

griffin/griffin.c

@@ -508,6 +508,7 @@ DRIVERS
 #include "../gfx/video_monitor.c"
 #include "../input/input_driver.c"
 #include "../audio/audio_driver.c"
+#include "../audio/audio_monitor.c"
 #include "../osk/osk_driver.c"
 #include "../camera/camera_driver.c"
 #include "../location/location_driver.c"