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/* g++ -o sftest sftest.cc `pkg-config --cflags --libs sndfile` `pkg-config --cflags --libs glibmm-2.4` */
#include <vector>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <cstdlib>
#include <unistd.h>
#include <sndfile.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <glibmm/miscutils.h>
using namespace std;
SF_INFO format_info;
float* data = 0;
bool with_sync = false;
int
write_one (SNDFILE* sf, uint32_t nframes)
{
if (sf_write_float (sf, (float*) data, nframes) != nframes) {
return -1;
}
if (with_sync) {
sf_write_sync (sf);
}
return 0;
}
void
usage ()
{
cout << "sftest [ -f HEADER-FORMAT ] [ -F DATA-FORMAT ] [ -r SAMPLERATE ] [ -n NFILES ] [ -b BLOCKSIZE ] [ -s ]" << endl;
cout << "\tHEADER-FORMAT is one of:" << endl
<< "\t\tWAV" << endl
<< "\t\tCAF" << endl
<< "\t\tW64" << endl;
cout << "\tDATA-FORMAT is one of:" << endl
<< "\t\tFLOAT" << endl
<< "\t\t32" << endl
<< "\t\t24" << endl
<< "\t\t16" << endl;
}
int
main (int argc, char* argv[])
{
vector<SNDFILE*> sndfiles;
uint32_t sample_size;
char optstring[] = "f:r:F:n:c:b:s";
int channels, samplerate;
char const *suffix = ".wav";
char const *header_format = "wav";
char const *data_format = "float";
uint32_t block_size = 64 * 1024;
uint32_t nfiles = 100;
const struct option longopts[] = {
{ "header-format", 1, 0, 'f' },
{ "data-format", 1, 0, 'F' },
{ "rate", 1, 0, 'r' },
{ "nfiles", 1, 0, 'n' },
{ "blocksize", 1, 0, 'b' },
{ "channels", 1, 0, 'c' },
{ "sync", 0, 0, 's' },
{ 0, 0, 0, 0 }
};
int option_index = 0;
int c = 0;
while (1) {
if ((c = getopt_long (argc, argv, optstring, longopts, &option_index)) == -1) {
break;
}
switch (c) {
case 'f':
header_format = optarg;
break;
case 'F':
data_format = optarg;
break;
case 'r':
samplerate = atoi (optarg);
break;
case 'n':
nfiles = atoi (optarg);
break;
case 'c':
channels = atoi (optarg);
case 'b':
block_size = atoi (optarg);
break;
case 's':
with_sync = true;
break;
default:
usage ();
return 0;
}
}
/* setup file format */
memset (&format_info, 0, sizeof (format_info));
if (samplerate == 0 || nfiles == 0 || block_size == 0 || channels == 0) {
usage ();
return 1;
}
format_info.samplerate = samplerate;
format_info.channels = channels;
if (strcasecmp (header_format, "wav") == 0) {
format_info.format |= SF_FORMAT_WAV;
suffix = ".wav";
} else if (strcasecmp (header_format, "caf") == 0) {
format_info.format |= SF_FORMAT_CAF;
suffix = ".caf";
} else if (strcasecmp (header_format, "w64") == 0) {
format_info.format |= SF_FORMAT_W64;
suffix = ".w64";
} else {
usage ();
return 0;
}
if (strcasecmp (data_format, "float") == 0) {
format_info.format |= SF_FORMAT_FLOAT;
sample_size = sizeof (float);
} else if (strcasecmp (data_format, "32") == 0) {
format_info.format |= SF_FORMAT_PCM_32;
sample_size = 4;
} else if (strcasecmp (data_format, "24") == 0) {
format_info.format |= SF_FORMAT_PCM_24;
sample_size = 3;
} else if (strcasecmp (data_format, "16") == 0) {
format_info.format |= SF_FORMAT_PCM_16;
sample_size = 2;
} else {
usage ();
return 0;
}
char tmpdirname[] = "sftest-XXXXXX";
g_mkdtemp (tmpdirname);
for (uint32_t n = 0; n < nfiles; ++n) {
SNDFILE* sf;
string path;
stringstream ss;
ss << "sf-";
ss << n;
ss << suffix;
path = Glib::build_filename (tmpdirname, ss.str());
if ((sf = sf_open (path.c_str(), SFM_RDWR, &format_info)) == 0) {
cerr << "Could not open file #" << n << " @ " << path << endl;
return 1;
}
sndfiles.push_back (sf);
}
cout << nfiles << " files are in " << tmpdirname << endl;
cout << "Format is " << suffix << ' ' << channels << " channel" << (channels > 1 ? "s" : "") << " written in chunks of " << block_size << " frames, synced ? " << (with_sync ? "yes" : "no") << endl;
data = new float[block_size*channels];
uint64_t written = 0;
while (true) {
gint64 before;
before = g_get_monotonic_time();
for (vector<SNDFILE*>::iterator s = sndfiles.begin(); s != sndfiles.end(); ++s) {
if (write_one (*s, block_size)) {
cerr << "Write failed for file #" << distance (sndfiles.begin(), s) << endl;
return 1;
}
}
written += block_size;
gint64 elapsed = g_get_monotonic_time() - before;
double bandwidth = (sndfiles.size() * block_size * channels * sample_size) / (elapsed/1000000.0);
double data_minutes = written / (double) (60.0 * 48000.0);
const double data_rate = sndfiles.size() * channels * sample_size * samplerate;
stringstream ds;
ds << setprecision (1) << data_minutes;
cout << "BW @ " << written << " frames (" << ds.str() << " minutes) = " << (bandwidth/1048576.0) << " MB/sec " << bandwidth / data_rate << " x faster than necessary " << endl;
usleep(1e6 * 1024 / samplerate);
}
return 0;
}
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