From 6b1dc161dc5c4ba99498ed175d22ca5d9d65c291 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@google.com>
Date: Mon, 20 Apr 2020 13:29:59 +0200
Subject: [PATCH] Use frame counter instead of real clock

---
 libretro/core-mapper.c   | 41 ----------------------------------------
 libretro/libretro-core.c |  3 +++
 libretro/platform.c      |  5 ++++-
 3 files changed, 7 insertions(+), 42 deletions(-)

diff --git a/libretro/core-mapper.c b/libretro/core-mapper.c
index 05a114a..68943cf 100644
--- a/libretro/core-mapper.c
+++ b/libretro/core-mapper.c
@@ -16,17 +16,6 @@ char DISKA_NAME[512]="\0";
 char DISKB_NAME[512]="\0";
 char TAPE_NAME[512]="\0";
 
-//TIME
-#ifdef __CELLOS_LV2__
-#include "sys/sys_time.h"
-#include "sys/timer.h"
-#define usleep  sys_timer_usleep
-#else
-#include <sys/types.h>
-#include <sys/time.h>
-#include <time.h>
-#endif
-
 extern void Screen_SetFullUpdate(int scr);
 
 long frame=0;
@@ -103,36 +92,6 @@ void retro_set_input_poll(retro_input_poll_t cb)
    input_poll_cb = cb;
 }
 
-long GetTicks(void)
-{ // in MSec
-#ifndef _ANDROID_
-
-#ifdef __CELLOS_LV2__
-
-   //#warning "GetTick PS3\n"
-
-   unsigned long	ticks_micro;
-   uint64_t secs;
-   uint64_t nsecs;
-
-   sys_time_get_current_time(&secs, &nsecs);
-   ticks_micro =  secs * 1000000UL + (nsecs / 1000);
-
-   return ticks_micro;///1000;
-#else
-   struct timeval tv;
-   gettimeofday (&tv, NULL);
-   return (tv.tv_sec*1000000 + tv.tv_usec);///1000;
-#endif
-
-#else
-
-   struct timespec now;
-   clock_gettime(CLOCK_MONOTONIC, &now);
-   return (now.tv_sec*1000000 + now.tv_nsec/1000);///1000;
-#endif
-
-} 
 int slowdown=0;
 
 #if defined(ANDROID) || defined(__ANDROID__)
diff --git a/libretro/libretro-core.c b/libretro/libretro-core.c
index 2992e78..420159f 100644
--- a/libretro/libretro-core.c
+++ b/libretro/libretro-core.c
@@ -31,6 +31,7 @@ int retrojoy_init=0,retro_ui_finalized=0;
 int retro_sound_finalized=0;
 
 float retro_fps=49.8607597;
+long long retro_frame_counter;
 extern int ToggleTV;
 extern int CURRENT_TV;
 
@@ -621,6 +622,8 @@ void retro_run(void)
    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
       update_variables();
 
+   retro_frame_counter++;
+
    if(pauseg==0){
 
       if (ToggleTV == 1)
diff --git a/libretro/platform.c b/libretro/platform.c
index 0735303..060760b 100644
--- a/libretro/platform.c
+++ b/libretro/platform.c
@@ -647,9 +647,12 @@ void PLATFORM_DisplayScreen(void)
 	retro_Render();
 }
 
+extern float retro_fps;
+extern long long retro_frame_counter;
+
 double PLATFORM_Time(void)
 {
-	return GetTicks()/1000 ;//* 1e-3;
+        return retro_frame_counter * (1000.0 / retro_fps);
 }
 
 void PLATFORM_PaletteUpdate(void)