/*** Copyright (c) 2004-2016, Erik de Castro Lopo <erikd@mega-nerd.com>** All rights reserved.**** This code is released under 2-clause BSD license. Please see the** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING*/ #include <stdio.h>#include <stdlib.h>#include <string.h>#include <time.h>#include <unistd.h>#include <math.h> #ifdef _WIN32#define WIN32_LEAN_AND_MEAN#include <windows.h>#endif #include <samplerate.h> #include "src_config.h" #include "util.h" #define BUFFER_LEN	(1<<16) static float input [BUFFER_LEN] ;static float output [BUFFER_LEN] ; static longthroughput_test (int converter, long best_throughput){	SRC_DATA src_data ;	clock_t start_time, clock_time ;	double duration ;	long total_frames = 0, throughput ;	int error ; 	printf ("    %-30s    ", src_get_name (converter)) ;	fflush (stdout) ; 	src_data.data_in = input ;	src_data.input_frames = ARRAY_LEN (input) ; 	src_data.data_out = output ;	src_data.output_frames = ARRAY_LEN (output) ; 	src_data.src_ratio = 0.99 ; #ifndef _WIN32	sleep (2) ;#else	Sleep (2000) ;#endif 	start_time = clock () ; 	do	{		if ((error = src_simple (&src_data, converter, 1)) != 0)		{	puts (src_strerror (error)) ;			exit (1) ;			} ; 		total_frames += src_data.output_frames_gen ; 		clock_time = clock () - start_time ;		duration = (1.0 * clock_time) / CLOCKS_PER_SEC ;	}	while (duration < 3.0) ; 	if (src_data.input_frames_used != ARRAY_LEN (input))	{	printf ("\n\nLine %d : input frames used %ld should be %d\n", __LINE__, src_data.input_frames_used, ARRAY_LEN (input)) ;		exit (1) ;		} ; 	if (fabs (src_data.src_ratio * src_data.input_frames_used - src_data.output_frames_gen) > 2)	{	printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ;		printf ("    input len  : %d\n", ARRAY_LEN (input)) ;		printf ("    output len : %ld (should be %g +/- 2)\n\n", src_data.output_frames_gen,				floor (0.5 + src_data.src_ratio * src_data.input_frames_used)) ;		exit (1) ;		} ; 	throughput = lrint (floor (total_frames / duration)) ; 	if (best_throughput == 0)	{	best_throughput = MAX (throughput, best_throughput) ;		printf ("%5.2f          %10ld\n", duration, throughput) ;		}	else	{	best_throughput = MAX (throughput, best_throughput) ;		printf ("%5.2f          %10ld       %10ld\n", duration, throughput, best_throughput) ;		}  	return best_throughput ;} /* throughput_test */ static voidsingle_run (void){ 	printf ("\n    CPU name : %s\n", get_cpu_name ()) ; 	puts (		"\n"		"    Converter                        Duration        Throughput\n"		"    -----------------------------------------------------------"		) ; 	throughput_test (SRC_ZERO_ORDER_HOLD, 0) ;	throughput_test (SRC_LINEAR, 0) ;	throughput_test (SRC_SINC_FASTEST, 0) ;	throughput_test (SRC_SINC_MEDIUM_QUALITY, 0) ;	throughput_test (SRC_SINC_BEST_QUALITY, 0) ; 	puts ("") ;	return ;} /* single_run */ static voidmulti_run (int run_count){	long zero_order_hold = 0, linear = 0 ;	long sinc_fastest = 0, sinc_medium = 0, sinc_best = 0 ;	int k ; 	puts (		"\n"		"    Converter                        Duration        Throughput      Best Throughput\n"		"    --------------------------------------------------------------------------------"		) ; 	for (k = 0 ; k < run_count ; k++)	{	zero_order_hold =	throughput_test (SRC_ZERO_ORDER_HOLD, zero_order_hold) ;		linear =			throughput_test (SRC_LINEAR, linear) ;		sinc_fastest =		throughput_test (SRC_SINC_FASTEST, sinc_fastest) ;		sinc_medium =		throughput_test (SRC_SINC_MEDIUM_QUALITY, sinc_medium) ;		sinc_best =			throughput_test (SRC_SINC_BEST_QUALITY, sinc_best) ; 		puts ("") ; 		/* Let the CPU cool down. We might be running on a laptop. */#ifndef _WIN32		sleep (10) ;#else		Sleep (10000) ;#endif		} ; 	printf ("\n    CPU name : %s\n", get_cpu_name ()) ; 	puts (		"\n"		"    Converter                        Best Throughput\n"		"    ------------------------------------------------"		) ;	printf ("    %-30s    %10ld\n", src_get_name (SRC_ZERO_ORDER_HOLD), zero_order_hold) ;	printf ("    %-30s    %10ld\n", src_get_name (SRC_LINEAR), linear) ;	printf ("    %-30s    %10ld\n", src_get_name (SRC_SINC_FASTEST), sinc_fastest) ;	printf ("    %-30s    %10ld\n", src_get_name (SRC_SINC_MEDIUM_QUALITY), sinc_medium) ;	printf ("    %-30s    %10ld\n", src_get_name (SRC_SINC_BEST_QUALITY), sinc_best) ; 	puts ("") ;} /* multi_run */ static voidusage_exit (const char * argv0){	const char * cptr ; 	if ((cptr = strrchr (argv0, '/')) != NULL)		argv0 = cptr ; 	printf (		"Usage :\n"	 	"    %s                 - Single run of the throughput test.\n"		"    %s --best-of N     - Do N runs of test a print bext result.\n"		"\n",		argv0, argv0) ; 	exit (0) ;} /* usage_exit */ intmain (int argc, char ** argv){	double freq ; 	memset (input, 0, sizeof (input)) ;	freq = 0.01 ;	gen_windowed_sines (1, &freq, 1.0, input, BUFFER_LEN) ; 	if (argc == 1)		single_run () ;	else if (argc == 3 && strcmp (argv [1], "--best-of") == 0)	{	int run_count = atoi (argv [2]) ; 		if (run_count < 1 || run_count > 20)		{	printf ("Please be sensible. Run count should be in range (1, 10].\n") ;			exit (1) ;			} ; 		multi_run (run_count) ;		}	else		usage_exit (argv [0]) ; 	puts (		"            Duration is in seconds.\n"		"            Throughput is in samples/sec (more is better).\n"		) ; 	return 0 ;} /* main */