4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
7 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
9 PulseAudio is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published
11 by the Free Software Foundation; either version 2 of the License,
12 or (at your option) any later version.
14 PulseAudio is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with PulseAudio; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
33 #include <pulsecore/core-util.h>
34 #include <pulsecore/macro.h>
38 size_t pa_sample_size(const pa_sample_spec *spec) {
40 static const size_t table[] = {
44 [PA_SAMPLE_S16LE] = 2,
45 [PA_SAMPLE_S16BE] = 2,
46 [PA_SAMPLE_FLOAT32LE] = 4,
47 [PA_SAMPLE_FLOAT32BE] = 4
51 pa_assert(spec->format >= 0);
52 pa_assert(spec->format < PA_SAMPLE_MAX);
54 return table[spec->format];
57 size_t pa_frame_size(const pa_sample_spec *spec) {
60 return pa_sample_size(spec) * spec->channels;
63 size_t pa_bytes_per_second(const pa_sample_spec *spec) {
65 return spec->rate*pa_frame_size(spec);
68 pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
71 return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate);
74 size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
77 return (size_t) (((double) t * spec->rate / 1000000))*pa_frame_size(spec);
80 int pa_sample_spec_valid(const pa_sample_spec *spec) {
83 if (spec->rate <= 0 ||
84 spec->rate > PA_RATE_MAX ||
85 spec->channels <= 0 ||
86 spec->channels > PA_CHANNELS_MAX ||
87 spec->format >= PA_SAMPLE_MAX ||
94 int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
98 return (a->format == b->format) && (a->rate == b->rate) && (a->channels == b->channels);
101 const char *pa_sample_format_to_string(pa_sample_format_t f) {
102 static const char* const table[]= {
103 [PA_SAMPLE_U8] = "u8",
104 [PA_SAMPLE_ALAW] = "aLaw",
105 [PA_SAMPLE_ULAW] = "uLaw",
106 [PA_SAMPLE_S16LE] = "s16le",
107 [PA_SAMPLE_S16BE] = "s16be",
108 [PA_SAMPLE_FLOAT32LE] = "float32le",
109 [PA_SAMPLE_FLOAT32BE] = "float32be",
112 if (f < 0 || f >= PA_SAMPLE_MAX)
118 char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
123 if (!pa_sample_spec_valid(spec))
124 pa_snprintf(s, l, "Invalid");
126 pa_snprintf(s, l, "%s %uch %uHz", pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
131 char* pa_bytes_snprint(char *s, size_t l, unsigned v) {
134 if (v >= ((unsigned) 1024)*1024*1024)
135 pa_snprintf(s, l, "%0.1f GiB", ((double) v)/1024/1024/1024);
136 else if (v >= ((unsigned) 1024)*1024)
137 pa_snprintf(s, l, "%0.1f MiB", ((double) v)/1024/1024);
138 else if (v >= (unsigned) 1024)
139 pa_snprintf(s, l, "%0.1f KiB", ((double) v)/1024);
141 pa_snprintf(s, l, "%u B", (unsigned) v);
146 pa_sample_format_t pa_parse_sample_format(const char *format) {
149 if (strcasecmp(format, "s16le") == 0)
150 return PA_SAMPLE_S16LE;
151 else if (strcasecmp(format, "s16be") == 0)
152 return PA_SAMPLE_S16BE;
153 else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
154 return PA_SAMPLE_S16NE;
155 else if (strcasecmp(format, "s16re") == 0)
156 return PA_SAMPLE_S16RE;
157 else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
159 else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0)
160 return PA_SAMPLE_FLOAT32NE;
161 else if (strcasecmp(format, "float32re") == 0)
162 return PA_SAMPLE_FLOAT32RE;
163 else if (strcasecmp(format, "float32le") == 0)
164 return PA_SAMPLE_FLOAT32LE;
165 else if (strcasecmp(format, "float32be") == 0)
166 return PA_SAMPLE_FLOAT32BE;
167 else if (strcasecmp(format, "ulaw") == 0 || strcasecmp(format, "mulaw") == 0)
168 return PA_SAMPLE_ULAW;
169 else if (strcasecmp(format, "alaw") == 0)
170 return PA_SAMPLE_ALAW;