[Mplayer-cvslog] CVS: main/liba52 test.c,1.1,1.2

[Michael Niedermayer]

Update of /cvsroot/mplayer/main/liba52
In directory mplayer:/var/tmp.root/cvs-serv21549

Modified Files:
	test.c 
Log Message:
benchmarking code (#define TIMING)


Index: test.c
===================================================================
RCS file: /cvsroot/mplayer/main/liba52/test.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- test.c	9 Dec 2001 15:30:03 -0000	1.1
+++ test.c	15 Dec 2001 22:32:14 -0000	1.2
@@ -4,6 +4,8 @@
 // writes it to stdout.  resulting stream playbackable with sox:
 //   play -c 2 -r 48000 out.sw
 
+//#define TIMING //needs Pentium or newer 
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <inttypes.h>
@@ -17,6 +19,25 @@
 
 static int16_t out_buf[6*256*6];
 
+#ifdef TIMING
+static inline long long rdtsc()
+{
+	long long l;
+	asm volatile(	"rdtsc\n\t"
+		: "=A" (l)
+	);
+//	printf("%d\n", int(l/1000));
+	return l;
+}
+
+#define STARTTIMING t=rdtsc();
+#define ENDTIMING sum+=rdtsc()-t; t=rdtsc();
+#else
+#define STARTTIMING ;
+#define ENDTIMING ;
+#endif
+
+
 static inline int16_t convert (int32_t i)
 {
     if (i > 0x43c07fff)
@@ -126,6 +147,9 @@
 int accel=0;
 int sample_rate=0;
 int bit_rate=0;
+#ifdef TIMING
+long long t, sum=0;
+#endif
 
     samples = a52_init (accel);
     if (samples == NULL) {
@@ -144,7 +168,9 @@
 	if(c<0) goto eof;
 	buf[buf_size++]=c;
     }
+STARTTIMING
     length = a52_syncinfo (buf, &flags, &sample_rate, &bit_rate);
+ENDTIMING
     if(!length){
 	// bad file => resync
 	memcpy(buf,buf+1,6);
@@ -161,8 +187,10 @@
     // decode:
     flags=A52_STEREO; // A52_DOLBY // A52_2F2R // A52_3F2R | A52_LFE
     flags |= A52_ADJUST_LEVEL;
+STARTTIMING
     if (a52_frame (&state, buf, &flags, &level, bias))
 	{ fprintf(stderr,"error at decoding\n"); continue; }
+ENDTIMING
 
     // a52_dynrng (&state, NULL, NULL); // disable dynamic range compensation
 
@@ -170,8 +198,10 @@
     for (i = 0; i < 6; i++) {
 	int32_t * f = (int32_t *) samples;
 	int i;
+STARTTIMING
 	if (a52_block (&state, samples))
 	    { fprintf(stderr,"error at sampling\n"); break; }
+ENDTIMING
 	// resample to STEREO/DOLBY:
 	for (i = 0; i < 256; i++) {
 	    s16[2*i] = convert (f[i]);
@@ -184,5 +214,9 @@
 }
 
 eof:
+
+#ifdef TIMING
+fprintf(stderr, "%4.4fm cycles\n",sum/1000000.0);
+#endif
 
 }