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/* g++ -o sfrtest sfrtest.cc `pkg-config --cflags --libs sndfile` `pkg-config --cflags --libs glibmm-2.4` */
#include <vector>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <cstdlib>
#include <cerrno>
#include <unistd.h>
#include <sndfile.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <fcntl.h>
#include <glibmm/miscutils.h>
#include <glibmm/fileutils.h>
using namespace std;
SF_INFO format_info;
float* data = 0;
int
read_one (SNDFILE* sf, uint32_t nframes)
{
if (sf_read_float (sf, (float*) data, nframes) != nframes) {
return -1;
}
if (with_sync) {
sf_write_sync (sf);
}
return 0;
}
void
usage ()
{
cout << "sfrtest [ -n NFILES ] [ -b BLOCKSIZE ] [ -s ] [ -D ] filename-template" << endl;
}
int
main (int argc, char* argv[])
{
vector<SNDFILE*> sndfiles;
uint32_t sample_size = sizeof (float);
char optstring[] = "n:b:sD";
uint32_t block_size = 64 * 1024;
uint32_t nfiles = 100;
bool direct = false;
const struct option longopts[] = {
{ "nfiles", 1, 0, 'n' },
{ "blocksize", 1, 0, 'b' },
{ "direct", 0, 0, 'D' },
{ 0, 0, 0, 0 }
};
int option_index = 0;
int c = 0;
char const * name_template = 0;
int samplerate;
while (1) {
if ((c = getopt_long (argc, argv, optstring, longopts, &option_index)) == -1) {
break;
}
switch (c) {
case 'n':
nfiles = atoi (optarg);
break;
case 'b':
block_size = atoi (optarg);
break;
case 'D':
direct = true;
break;
default:
usage ();
return 0;
}
}
if (optind < argc) {
name_template = argv[optind];
} else {
usage ();
return 1;
}
for (uint32_t n = 1; n <= nfiles; ++n) {
SNDFILE* sf;
char path[PATH_MAX+1];
snprintf (path, sizeof (path), name_template, n);
if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_REGULAR)) {
break;
}
int flags = O_RDONLY;
int fd = open (path, flags, 0644);
if (fd < 0) {
cerr << "Could not open file #" << n << " @ " << path << " (" << strerror (errno) << ")" << endl;
return 1;
}
#ifdef __APPLE__
if (direct) {
/* Apple man pages say only that it returns "a value other than -1 on success",
which probably means zero, but you just can't be too careful with
those guys.
*/
if (fcntl (fd, F_NOCACHE, 1) == -1) {
cerr << "Cannot set F_NOCACHE on file # " << n << endl;
}
}
#endif
if ((sf = sf_open_fd (fd, SFM_READ, &format_info, true)) == 0) {
cerr << "Could not open SNDFILE #" << n << " @ " << path << " (" << sf_strerror (0) << ")" << endl;
return 1;
}
samplerate = format_info.samplerate;
sndfiles.push_back (sf);
}
cout << "Discovered " << sndfiles.size() << " files using " << name_template << endl;
data = new float[block_size];
uint64_t read = 0;
while (true) {
gint64 before;
before = g_get_monotonic_time();
for (vector<SNDFILE*>::iterator s = sndfiles.begin(); s != sndfiles.end(); ++s) {
if (read_one (*s, block_size)) {
cerr << "Read failed for file #" << distance (sndfiles.begin(), s) << endl;
return 1;
}
}
read += block_size;
gint64 elapsed = g_get_monotonic_time() - before;
double bandwidth = ((sndfiles.size() * block_size * sample_size)/1048576.0) / (elapsed/1000000.0);
printf ("BW @ %Lu %.3f seconds bandwidth %.4f MB/sec\n", read, elapsed/1000000.0, bandwidth);
}
return 0;
}
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