Add ffmpeg_remuxer

opts/log.c

@@ -40,3 +40,45 @@ bool filter_log(const char *filename)
 
   return false;
 }
+
+int shrink_to_block(int size, int block)
+{
+	return size / block * block;
+}
+
+uint64_t get_time_us(clockid_t clock, struct timespec *ts, struct timeval *tv, int64_t delays_us)
+{
+	struct timespec now;
+
+	if (clock != CLOCK_FROM_PARAMS) {
+		clock_gettime(clock, &now);
+	} else if (ts) {
+		now = *ts;
+	} else if (tv) {
+		now.tv_sec = tv->tv_sec;
+		now.tv_nsec = tv->tv_usec * 1000;
+	} else {
+		return -1;
+	}
+
+	if (delays_us > 0) {
+		#define NS_IN_S (1000LL * 1000LL * 1000LL)
+		int64_t nsec = now.tv_nsec + delays_us * 1000LL;
+		now.tv_nsec = nsec % NS_IN_S;
+		now.tv_sec += nsec / NS_IN_S;
+	}
+
+	if (ts) {
+		*ts = now;
+	}
+	if (tv) {
+		tv->tv_sec = now.tv_sec;
+		tv->tv_usec = now.tv_nsec / 1000;
+	}
+	return now.tv_sec * 1000000LL + now.tv_nsec / 1000;
+}
+
+uint64_t get_monotonic_time_us(struct timespec *ts, struct timeval *tv)
+{
+	return get_time_us(CLOCK_MONOTONIC, ts, tv, 0);
+}