4 This file is part of PulseAudio.
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
33 size_t pa_sample_size(const pa_sample_spec *spec) {
36 switch (spec->format) {
44 case PA_SAMPLE_FLOAT32LE:
45 case PA_SAMPLE_FLOAT32BE:
53 size_t pa_frame_size(const pa_sample_spec *spec) {
56 return pa_sample_size(spec) * spec->channels;
59 size_t pa_bytes_per_second(const pa_sample_spec *spec) {
61 return spec->rate*pa_frame_size(spec);
64 pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
67 return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate);
70 size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
73 return (size_t) (((double) t * spec->rate / 1000000))*pa_frame_size(spec);
76 int pa_sample_spec_valid(const pa_sample_spec *spec) {
79 if (spec->rate <= 0 ||
80 spec->channels <= 0 ||
81 spec->channels > PA_CHANNELS_MAX ||
82 spec->format >= PA_SAMPLE_MAX ||
89 int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
92 return (a->format == b->format) && (a->rate == b->rate) && (a->channels == b->channels);
95 const char *pa_sample_format_to_string(pa_sample_format_t f) {
96 static const char* const table[]= {
97 [PA_SAMPLE_U8] = "u8",
98 [PA_SAMPLE_ALAW] = "aLaw",
99 [PA_SAMPLE_ULAW] = "uLaw",
100 [PA_SAMPLE_S16LE] = "s16le",
101 [PA_SAMPLE_S16BE] = "s16be",
102 [PA_SAMPLE_FLOAT32LE] = "float32le",
103 [PA_SAMPLE_FLOAT32BE] = "float32be",
106 if (f >= PA_SAMPLE_MAX)
112 char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
113 assert(s && l && spec);
115 if (!pa_sample_spec_valid(spec))
116 snprintf(s, l, "Invalid");
118 snprintf(s, l, "%s %uch %uHz", pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
123 char* pa_bytes_snprint(char *s, size_t l, unsigned v) {
124 if (v >= ((unsigned) 1024)*1024*1024)
125 snprintf(s, l, "%0.1f GiB", ((double) v)/1024/1024/1024);
126 else if (v >= ((unsigned) 1024)*1024)
127 snprintf(s, l, "%0.1f MiB", ((double) v)/1024/1024);
128 else if (v >= (unsigned) 1024)
129 snprintf(s, l, "%0.1f KiB", ((double) v)/1024);
131 snprintf(s, l, "%u B", (unsigned) v);
136 pa_sample_format_t pa_parse_sample_format(const char *format) {
138 if (strcasecmp(format, "s16le") == 0)
139 return PA_SAMPLE_S16LE;
140 else if (strcasecmp(format, "s16be") == 0)
141 return PA_SAMPLE_S16BE;
142 else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
143 return PA_SAMPLE_S16NE;
144 else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
146 else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0)
147 return PA_SAMPLE_FLOAT32;
148 else if (strcasecmp(format, "float32le") == 0)
149 return PA_SAMPLE_FLOAT32LE;
150 else if (strcasecmp(format, "float32be") == 0)
151 return PA_SAMPLE_FLOAT32BE;
152 else if (strcasecmp(format, "ulaw") == 0)
153 return PA_SAMPLE_ULAW;
154 else if (strcasecmp(format, "alaw") == 0)
155 return PA_SAMPLE_ALAW;