Release 0.12.0

native/continuity.h

@@ -1,35 +1,76 @@
 #ifndef HYPERDRM_CONTINUITY_H
 #define HYPERDRM_CONTINUITY_H
 /* Zero population is missing data, while populated bin zero is real black. */
-static inline bool histogram_populated(const Histogram hist[16]){
- for(unsigned r=0;r<16;r++)for(unsigned c=0;c<3;c++){
-  uint64_t total=0;for(unsigned b=0;b<256;b++)total+=hist[r].bins[c][b];
-  if(!total)return false;
- }
- return true;
+static inline bool histogram_populated(const Histogram hist[16]) {
+    for (unsigned r = 0; r < 16; r++)
+        for (unsigned c = 0; c < 3; c++) {
+            uint64_t total = 0;
+            for (unsigned b = 0; b < 256; b++)
+                total += hist[r].bins[c][b];
+            if (!total)
+                return false;
+        }
+    return true;
 }
-typedef struct {unsigned char last[16][3],from[16][3];uint64_t valid_at,fade_at,missing_at;bool available,fading,holding;} Continuity;
-static inline void continuity_seed(Continuity *s,const unsigned char colors[16][3],uint64_t now){
- memcpy(s->last,colors,sizeof(s->last));memcpy(s->from,colors,sizeof(s->from));s->valid_at=now;s->available=true;s->fading=true;s->fade_at=0;s->missing_at=0;s->holding=false;
+typedef struct {
+    unsigned char last[16][3], from[16][3];
+    uint64_t valid_at, fade_at, missing_at;
+    bool available, fading, holding;
+} Continuity;
+static inline void continuity_seed(Continuity *s, const unsigned char colors[16][3], uint64_t now) {
+    memcpy(s->last, colors, sizeof(s->last));
+    memcpy(s->from, colors, sizeof(s->from));
+    s->valid_at = now;
+    s->available = true;
+    s->fading = true;
+    s->fade_at = 0;
+    s->missing_at = 0;
+    s->holding = false;
 }
-static inline void continuity_mix(const unsigned char from[16][3],const unsigned char to[16][3],unsigned elapsed,unsigned char out[16][3]){
- if(elapsed>500)elapsed=500;
- for(unsigned r=0;r<16;r++)for(unsigned c=0;c<3;c++)out[r][c]=(from[r][c]*(500-elapsed)+to[r][c]*elapsed+250)/500;
+static inline void continuity_mix(const unsigned char from[16][3], const unsigned char to[16][3],
+                                  unsigned elapsed, unsigned char out[16][3]) {
+    if (elapsed > 500)
+        elapsed = 500;
+    for (unsigned r = 0; r < 16; r++)
+        for (unsigned c = 0; c < 3; c++)
+            out[r][c] = (from[r][c] * (500 - elapsed) + to[r][c] * elapsed + 250) / 500;
 }
-static inline bool continuity_frame(Continuity *s,bool valid,const unsigned char input[16][3],uint64_t now,unsigned char out[16][3]){
- if(!valid){
-  if(!s->missing_at)s->missing_at=now;
-  s->holding=s->available && now-s->missing_at<1500;
-  if(s->holding)memcpy(out,s->last,sizeof(s->last));
-  return s->holding;
- }
- if(s->holding){memcpy(s->from,s->last,sizeof(s->from));s->fading=true;s->fade_at=0;}
- s->holding=false;s->missing_at=0;
- /* Near-black codec rounding is valid darkness, not a lost measurement. */
- bool black=true;for(unsigned r=0;r<16;r++)for(unsigned c=0;c<3;c++)if(input[r][c]>3)black=false;
- if(black)s->fading=false;
- if(s->fading){if(!s->fade_at)s->fade_at=now;continuity_mix(s->from,input,(unsigned)(now-s->fade_at),out);if(now-s->fade_at>=500)s->fading=false;}
- else memcpy(out,input,sizeof(s->last));
- memcpy(s->last,out,sizeof(s->last));s->available=true;s->valid_at=now;return true;
+static inline bool continuity_frame(Continuity *s, bool valid, const unsigned char input[16][3],
+                                    uint64_t now, unsigned char out[16][3]) {
+    if (!valid) {
+        if (!s->missing_at)
+            s->missing_at = now;
+        s->holding = s->available && now - s->missing_at < 1500;
+        if (s->holding)
+            memcpy(out, s->last, sizeof(s->last));
+        return s->holding;
+    }
+    if (s->holding) {
+        memcpy(s->from, s->last, sizeof(s->from));
+        s->fading = true;
+        s->fade_at = 0;
+    }
+    s->holding = false;
+    s->missing_at = 0;
+    /* Near-black codec rounding is valid darkness, not a lost measurement. */
+    bool black = true;
+    for (unsigned r = 0; r < 16; r++)
+        for (unsigned c = 0; c < 3; c++)
+            if (input[r][c] > 3)
+                black = false;
+    if (black)
+        s->fading = false;
+    if (s->fading) {
+        if (!s->fade_at)
+            s->fade_at = now;
+        continuity_mix(s->from, input, (unsigned)(now - s->fade_at), out);
+        if (now - s->fade_at >= 500)
+            s->fading = false;
+    } else
+        memcpy(out, input, sizeof(s->last));
+    memcpy(s->last, out, sizeof(s->last));
+    s->available = true;
+    s->valid_at = now;
+    return true;
 }
 #endif