report framerate changes (for svga)

see #18

Author: vadosnaprimer

src/vid_svga.c

@@ -449,6 +449,7 @@ void svga_recalctimings(svga_t *svga)
         printf("total %f on %i cycles off %i cycles frame %i sec %i %02X\n",disptime*crtcconst,svga->dispontime,svga->dispofftime,(svga->dispontime+svga->dispofftime)*svga->vtotal,(svga->dispontime+svga->dispofftime)*svga->vtotal*70,svga->seqregs[1]);
 
         pclog("svga->render %08X\n", svga->render);*/
+	report_framerate_change((unsigned long long)(cpuclock * (float)(1ull << 32) / svga->clock), (unsigned long long)(svga->vtotal * disptime * svga->char_width));
 }
 
 extern int cyc_total;

src/video.c

@@ -508,6 +508,8 @@ uint8_t rotatevga[8][256];
 int frames = 0;
 int video_frames = 0;
 int video_refresh_rate = 0;
+int framerate_numerator = 1;
+int framerate_denominator = 1;
 
 int fullchange;
 
@@ -1266,3 +1268,20 @@ void cgapal_rebuild(int display_type, int contrast)
                 break;
         }
 }
+
+void report_framerate_change(unsigned long long num, unsigned long long denom)
+{
+	int print = 0;
+	if (num != framerate_numerator)
+	{
+		framerate_numerator = num;
+		print = 1;
+	}
+	if (denom != framerate_denominator)
+	{
+		framerate_denominator = denom;
+		print = 1;
+	}
+	if (print)
+		fprintf(stdout, "Setting framerate: %d / %d = %.14lf\n", num, denom, (double)num / denom);
+}

src/video.h

@@ -33,6 +33,7 @@ int video_get_video_from_internal_name(char *s);
 int video_is_mda();
 int video_is_cga();
 int video_is_ega_vga();
+void report_framerate_change(unsigned long long num, unsigned long long denom);
 
 extern int video_fullscreen, video_fullscreen_scale, video_fullscreen_first;
 extern int video_force_aspect_ration;