Updated LMP88959 filters.

src/extra/NTSC-CRT/crt_core.c

@@ -320,6 +320,26 @@ crt_demodulate(struct CRT *v, int noise)
     huecs >>= 11;
 
     rn = v->rn;
+#if !CRT_DO_VSYNC
+    /* determine field before we add noise,
+     * otherwise it's not reliably recoverable
+     */
+    for (i = -CRT_VSYNC_WINDOW; i < CRT_VSYNC_WINDOW; i++) {
+        line = POSMOD(v->vsync + i, CRT_VRES);
+        sig = v->analog + line * CRT_HRES;
+        s = 0;
+        for (j = 0; j < CRT_HRES; j++) {
+            s += sig[j];
+            if (s <= (CRT_VSYNC_THRESH * SYNC_LEVEL)) {
+                goto found_field;
+            }
+        }
+    }
+found_field:
+    /* if vsync signal was in second half of line, odd field */
+    field = (j > (CRT_HRES / 2));
+    v->vsync = -3;
+#endif
 #if ((CRT_SYSTEM == CRT_SYSTEM_NTSCVHS) && CRT_VHS_NOISE)
     line = ((rand() % 8) - 4) + 14;
 #endif
@@ -346,6 +366,7 @@ crt_demodulate(struct CRT *v, int noise)
     }
     v->rn = rn;
 
+#if CRT_DO_VSYNC
     /* Look for vertical sync.
      * 
      * This is done by integrating the signal and
@@ -370,13 +391,11 @@ crt_demodulate(struct CRT *v, int noise)
         }
     }
 vsync_found:
-#if CRT_DO_VSYNC
     v->vsync = line; /* vsync found (or gave up) at this line */
-#else
-    v->vsync = -3;
-#endif
     /* if vsync signal was in second half of line, odd field */
     field = (j > (CRT_HRES / 2));
+#endif
+
 #if CRT_DO_BLOOM
     max_e = (128 + (noise / 2)) * AV_LEN;
     prev_e = (16384 / 8);

src/extra/NTSC-CRT/crt_core.h

@@ -24,7 +24,7 @@ extern "C" {
 /* library version */
 #define CRT_MAJOR 2
 #define CRT_MINOR 3
-#define CRT_PATCH 0
+#define CRT_PATCH 1
 
 
 #define CRT_SYSTEM_NTSC     0 /* standard NTSC */

src/extra/PAL-CRT/README.md

@@ -154,6 +154,13 @@ pal_demodulate(&crt, noise);
 field++;
 ```
 
+------
+
+### Emulators
+These emulators have this PAL filter as an option:  
+puNES: https://github.com/punesemu/puNES  
+BeesNES: https://github.com/L-Spiro/BeesNES  
+
 ------
 If you have any questions feel free to leave a comment on YouTube OR
 join the King's Crook Discord server :)

src/extra/PAL-CRT/pal_core.c

@@ -305,6 +305,26 @@ pal_demodulate(struct PAL_CRT *c, int noise)
     pitch = c->outw * bpp;
 
     rn = c->rn;
+#if !PAL_DO_VSYNC
+    /* determine field before we add noise,
+     * otherwise it's not reliably recoverable
+     */
+    for (i = -VSYNC_WINDOW; i < VSYNC_WINDOW; i++) {
+        line = POSMOD(c->vsync + i, PAL_VRES);
+        sig = c->analog + line * PAL_HRES;
+        s = 0;
+        for (j = 0; j < PAL_HRES; j++) {
+            s += sig[j];
+            if (s <= (125 * SYNC_LEVEL)) {
+                goto found_field;
+            }
+        }
+    }
+found_field:
+    /* if vsync signal was in second half of line, odd field */
+    field = (j > (PAL_HRES / 2));
+    c->vsync = -3;
+#endif
     for (i = 0; i < PAL_INPUT_SIZE; i++) {
         rn = (214019 * rn + 140327895);
 
@@ -315,7 +335,7 @@ pal_demodulate(struct PAL_CRT *c, int noise)
         c->inp[i] = s;
     }
     c->rn = rn;
-
+#if PAL_DO_VSYNC
     /* Look for vertical sync.
      * 
      * This is done by integrating the signal and
@@ -340,13 +360,10 @@ pal_demodulate(struct PAL_CRT *c, int noise)
         }
     }
 vsync_found:
-#if PAL_DO_VSYNC
     c->vsync = line; /* vsync found (or gave up) at this line */
-#else
-    c->vsync = -3;
-#endif
     /* if vsync signal was in second half of line, odd field */
     field = (j > (PAL_HRES / 2));
+#endif
 
 #if PAL_DO_BLOOM
     max_e = (128 + (noise / 2)) * AV_LEN;

src/extra/PAL-CRT/pal_core.h

@@ -26,7 +26,7 @@ extern "C" {
 /* library version */
 #define PAL_MAJOR 1
 #define PAL_MINOR 2
-#define PAL_PATCH 0
+#define PAL_PATCH 1
 
 #define PAL_SYSTEM_PAL    0 /* 'standard' PAL */
 #define PAL_SYSTEM_NES    1 /* decode 6 or 9-bit NES pixels */