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diff -urp libsrtp-1.5.0/test/srtp_driver.c l/test/srtp_driver.c
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--- libsrtp-1.5.0/test/srtp_driver.c	2014-10-13 16:35:33.000000000 +0200
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+++ libsrtp-1.5.4/test/srtp_driver.c	2015-09-18 06:41:50.740727805 +0200
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@@ -341,7 +341,7 @@ main (int argc, char *argv[]) {
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   if (do_codec_timing) {
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     srtp_policy_t policy;
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     int ignore;
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-    double mips = mips_estimate(1000000000, &ignore);
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+    double mips_est = mips_estimate(1000000000, &ignore);
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     crypto_policy_set_rtp_default(&policy.rtp);
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     crypto_policy_set_rtcp_default(&policy.rtcp);
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@@ -353,33 +353,33 @@ main (int argc, char *argv[]) {
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     policy.allow_repeat_tx = 0;
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     policy.next = NULL;
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-    printf("mips estimate: %e\n", mips);
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+    printf("mips estimate: %e\n", mips_est);
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     printf("testing srtp processing time for voice codecs:\n");
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     printf("codec\t\tlength (octets)\t\tsrtp instructions/second\n");
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     printf("G.711\t\t%d\t\t\t%e\n", 80, 
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-           (double) mips * (80 * 8) / 
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+           (double) mips_est * (80 * 8) / 
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 	   srtp_bits_per_second(80, &policy) / .01 );
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     printf("G.711\t\t%d\t\t\t%e\n", 160, 
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-           (double) mips * (160 * 8) / 
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+           (double) mips_est * (160 * 8) / 
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 	   srtp_bits_per_second(160, &policy) / .02);
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     printf("G.726-32\t%d\t\t\t%e\n", 40, 
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-           (double) mips * (40 * 8) / 
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+           (double) mips_est * (40 * 8) / 
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 	   srtp_bits_per_second(40, &policy) / .01 );
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     printf("G.726-32\t%d\t\t\t%e\n", 80, 
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-           (double) mips * (80 * 8) / 
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+           (double) mips_est * (80 * 8) / 
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 	   srtp_bits_per_second(80, &policy) / .02);
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     printf("G.729\t\t%d\t\t\t%e\n", 10, 
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-           (double) mips * (10 * 8) / 
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+           (double) mips_est * (10 * 8) / 
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 	   srtp_bits_per_second(10, &policy) / .01 );
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     printf("G.729\t\t%d\t\t\t%e\n", 20, 
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-           (double) mips * (20 * 8) /
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+           (double) mips_est * (20 * 8) /
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 	   srtp_bits_per_second(20, &policy) / .02 );
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     printf("Wideband\t%d\t\t\t%e\n", 320, 
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-           (double) mips * (320 * 8) /
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+           (double) mips_est * (320 * 8) /
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 	   srtp_bits_per_second(320, &policy) / .01 );
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     printf("Wideband\t%d\t\t\t%e\n", 640, 
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-           (double) mips * (640 * 8) /
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+           (double) mips_est * (640 * 8) /
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 	   srtp_bits_per_second(640, &policy) / .02 );
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   }
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