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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <math.h>
#include <string.h>
#include "sample.h"
size_t pa_sample_size(const pa_sample_spec *spec) {
assert(spec);
switch (spec->format) {
case PA_SAMPLE_U8:
case PA_SAMPLE_ULAW:
case PA_SAMPLE_ALAW:
return 1;
case PA_SAMPLE_S16LE:
case PA_SAMPLE_S16BE:
return 2;
case PA_SAMPLE_FLOAT32LE:
case PA_SAMPLE_FLOAT32BE:
return 4;
default:
assert(0);
}
}
size_t pa_frame_size(const pa_sample_spec *spec) {
assert(spec);
return pa_sample_size(spec) * spec->channels;
}
size_t pa_bytes_per_second(const pa_sample_spec *spec) {
assert(spec);
return spec->rate*pa_frame_size(spec);
}
pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
assert(spec);
return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate);
}
int pa_sample_spec_valid(const pa_sample_spec *spec) {
assert(spec);
if (spec->rate <= 0 ||
spec->channels <= 0 ||
spec->channels > PA_CHANNELS_MAX ||
spec->format >= PA_SAMPLE_MAX ||
spec->format < 0)
return 0;
return 1;
}
int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
assert(a && b);
return (a->format == b->format) && (a->rate == b->rate) && (a->channels == b->channels);
}
const char *pa_sample_format_to_string(pa_sample_format_t f) {
static const char* const table[]= {
[PA_SAMPLE_U8] = "u8",
[PA_SAMPLE_ALAW] = "aLaw",
[PA_SAMPLE_ULAW] = "uLaw",
[PA_SAMPLE_S16LE] = "s16le",
[PA_SAMPLE_S16BE] = "s16be",
[PA_SAMPLE_FLOAT32LE] = "float32le",
[PA_SAMPLE_FLOAT32BE] = "float32be",
};
if (f >= PA_SAMPLE_MAX)
return NULL;
return table[f];
}
char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
assert(s && l && spec);
if (!pa_sample_spec_valid(spec))
snprintf(s, l, "Invalid");
else
snprintf(s, l, "%s %uch %uHz", pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
return s;
}
void pa_bytes_snprint(char *s, size_t l, unsigned v) {
if (v >= ((unsigned) 1024)*1024*1024)
snprintf(s, l, "%0.1f GiB", ((double) v)/1024/1024/1024);
else if (v >= ((unsigned) 1024)*1024)
snprintf(s, l, "%0.1f MiB", ((double) v)/1024/1024);
else if (v >= (unsigned) 1024)
snprintf(s, l, "%0.1f KiB", ((double) v)/1024);
else
snprintf(s, l, "%u B", (unsigned) v);
}
pa_sample_format_t pa_parse_sample_format(const char *format) {
if (strcasecmp(format, "s16le") == 0)
return PA_SAMPLE_S16LE;
else if (strcasecmp(format, "s16be") == 0)
return PA_SAMPLE_S16BE;
else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
return PA_SAMPLE_S16NE;
else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
return PA_SAMPLE_U8;
else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0)
return PA_SAMPLE_FLOAT32;
else if (strcasecmp(format, "float32le") == 0)
return PA_SAMPLE_FLOAT32LE;
else if (strcasecmp(format, "float32be") == 0)
return PA_SAMPLE_FLOAT32BE;
else if (strcasecmp(format, "ulaw") == 0)
return PA_SAMPLE_ULAW;
else if (strcasecmp(format, "alaw") == 0)
return PA_SAMPLE_ALAW;
return -1;
}
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