shithub: hj264

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limit fps (in a dumb way)

--- a/hj264.c

+++ b/hj264.c

@@ -7,6 +7,8 @@

 #include <memdraw.h>

 #include <tos.h>

+void npe_nsleep(uvlong ns);

+

 #define max(a,b) ((a)>(b)?(a):(b))

 #define min(a,b) ((a)<(b)?(a):(b))

 #define clp(v,a,b) min((b), max((v),(a)))

@@ -303,8 +305,8 @@

 main(int argc, char **argv)

 {

 	int nthreads, fps, kbps, denoise, quality, qp;

+	uvlong start, end, fstart, fend;

 	int ww, hh, in, nframes;

-	uvlong start, end;

 	Memimage *im;

 	Hj264 *h;

 	char *s;

@@ -355,6 +357,7 @@

 	h = nil;

 	start = nanosec();

 	for(nframes = 0;; nframes++){

+		fstart = nanosec();

 		seek(in, 0, 0);

 		if((im = readmemimage(in)) == nil)

 			break;

@@ -367,6 +370,8 @@

 			if(Binit(&h->out, 1, OWRITE) < 0)

 				sysfatal("Binit failed: %r");

 			h->frame = chancreate(sizeof(void*), fps);

+

+			/* FIXME how about changing these on the fly? */

 			h->rp.encode_speed = Maxquality - quality;

 			h->rp.qp_min = h->rp.qp_max = qp;

 			if(kbps > 0){

@@ -377,8 +382,12 @@

 			proccreate(encthread, h, mainstacksize);

 		}

-		sendp(h->frame, im);

+		if(sendp(h->frame, im) != 1)

+			break;

+		fend = nanosec();

+		if(1000000000ULL/fps > (fend - fstart))

+			npe_nsleep(1000000000ULL/fps - (fend - fstart));

 		if(nanosec() - start > 4000000000ULL)

 			break;

 	}