code.delx.au - pulseaudio/blob - src/pulse/sample.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <math.h>
  29 #include <string.h>
  30
  31 #include <pulse/timeval.h>
  32 #include <pulse/i18n.h>
  33
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/macro.h>
  36
  37 #include "sample.h"
  38
  39 size_t pa_sample_size_of_format(pa_sample_format_t f) {
  40
  41     static const size_t table[] = {
  42         [PA_SAMPLE_U8] = 1,
  43         [PA_SAMPLE_ULAW] = 1,
  44         [PA_SAMPLE_ALAW] = 1,
  45         [PA_SAMPLE_S16LE] = 2,
  46         [PA_SAMPLE_S16BE] = 2,
  47         [PA_SAMPLE_FLOAT32LE] = 4,
  48         [PA_SAMPLE_FLOAT32BE] = 4,
  49         [PA_SAMPLE_S32LE] = 4,
  50         [PA_SAMPLE_S32BE] = 4,
  51         [PA_SAMPLE_S24LE] = 3,
  52         [PA_SAMPLE_S24BE] = 3,
  53         [PA_SAMPLE_S24_32LE] = 4,
  54         [PA_SAMPLE_S24_32BE] = 4
  55     };
  56
  57     pa_assert(f >= 0);
  58     pa_assert(f < PA_SAMPLE_MAX);
  59
  60     return table[f];
  61 }
  62
  63 size_t pa_sample_size(const pa_sample_spec *spec) {
  64
  65     pa_assert(spec);
  66     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  67
  68     return pa_sample_size_of_format(spec->format);
  69 }
  70
  71 size_t pa_frame_size(const pa_sample_spec *spec) {
  72     pa_assert(spec);
  73     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  74
  75     return pa_sample_size(spec) * spec->channels;
  76 }
  77
  78 size_t pa_bytes_per_second(const pa_sample_spec *spec) {
  79     pa_assert(spec);
  80     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  81
  82     return spec->rate*pa_frame_size(spec);
  83 }
  84
  85 pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
  86     pa_assert(spec);
  87     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  88
  89     return (((pa_usec_t) (length / pa_frame_size(spec)) * PA_USEC_PER_SEC) / spec->rate);
  90 }
  91
  92 size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
  93     pa_assert(spec);
  94     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  95
  96     return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) * pa_frame_size(spec);
  97 }
  98
  99 pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) {
 100     pa_assert(spec);
 101
 102     spec->format = PA_SAMPLE_INVALID;
 103     spec->rate = 0;
 104     spec->channels = 0;
 105
 106     return spec;
 107 }
 108
 109 int pa_sample_spec_valid(const pa_sample_spec *spec) {
 110     pa_assert(spec);
 111
 112     if (spec->rate <= 0 ||
 113         spec->rate > PA_RATE_MAX ||
 114         spec->channels <= 0 ||
 115         spec->channels > PA_CHANNELS_MAX ||
 116         spec->format >= PA_SAMPLE_MAX ||
 117         spec->format < 0)
 118         return 0;
 119
 120     return 1;
 121 }
 122
 123 int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
 124     pa_assert(a);
 125     pa_assert(b);
 126
 127     pa_return_val_if_fail(pa_sample_spec_valid(a), 0);
 128     pa_return_val_if_fail(pa_sample_spec_valid(b), 0);
 129
 130     return
 131         (a->format == b->format) &&
 132         (a->rate == b->rate) &&
 133         (a->channels == b->channels);
 134 }
 135
 136 const char *pa_sample_format_to_string(pa_sample_format_t f) {
 137     static const char* const table[]= {
 138         [PA_SAMPLE_U8] = "u8",
 139         [PA_SAMPLE_ALAW] = "aLaw",
 140         [PA_SAMPLE_ULAW] = "uLaw",
 141         [PA_SAMPLE_S16LE] = "s16le",
 142         [PA_SAMPLE_S16BE] = "s16be",
 143         [PA_SAMPLE_FLOAT32LE] = "float32le",
 144         [PA_SAMPLE_FLOAT32BE] = "float32be",
 145         [PA_SAMPLE_S32LE] = "s32le",
 146         [PA_SAMPLE_S32BE] = "s32be",
 147         [PA_SAMPLE_S24LE] = "s24le",
 148         [PA_SAMPLE_S24BE] = "s24be",
 149         [PA_SAMPLE_S24_32LE] = "s24-32le",
 150         [PA_SAMPLE_S24_32BE] = "s24-32be",
 151     };
 152
 153     if (f < 0 || f >= PA_SAMPLE_MAX)
 154         return NULL;
 155
 156     return table[f];
 157 }
 158
 159 char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
 160     pa_assert(s);
 161     pa_assert(l > 0);
 162     pa_assert(spec);
 163
 164     pa_init_i18n();
 165
 166     if (!pa_sample_spec_valid(spec))
 167         pa_snprintf(s, l, _("(invalid)"));
 168     else
 169         pa_snprintf(s, l, _("%s %uch %uHz"), pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
 170
 171     return s;
 172 }
 173
 174 char* pa_bytes_snprint(char *s, size_t l, unsigned v) {
 175     pa_assert(s);
 176     pa_assert(l > 0);
 177
 178     pa_init_i18n();
 179
 180     if (v >= ((unsigned) 1024)*1024*1024)
 181         pa_snprintf(s, l, _("%0.1f GiB"), ((double) v)/1024/1024/1024);
 182     else if (v >= ((unsigned) 1024)*1024)
 183         pa_snprintf(s, l, _("%0.1f MiB"), ((double) v)/1024/1024);
 184     else if (v >= (unsigned) 1024)
 185         pa_snprintf(s, l, _("%0.1f KiB"), ((double) v)/1024);
 186     else
 187         pa_snprintf(s, l, _("%u B"), (unsigned) v);
 188
 189     return s;
 190 }
 191
 192 pa_sample_format_t pa_parse_sample_format(const char *format) {
 193     pa_assert(format);
 194
 195     if (strcasecmp(format, "s16le") == 0)
 196         return PA_SAMPLE_S16LE;
 197     else if (strcasecmp(format, "s16be") == 0)
 198         return PA_SAMPLE_S16BE;
 199     else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
 200         return PA_SAMPLE_S16NE;
 201     else if (strcasecmp(format, "s16re") == 0)
 202         return PA_SAMPLE_S16RE;
 203     else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
 204         return PA_SAMPLE_U8;
 205     else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0 || strcasecmp(format, "float") == 0)
 206         return PA_SAMPLE_FLOAT32NE;
 207     else if (strcasecmp(format, "float32re") == 0)
 208         return PA_SAMPLE_FLOAT32RE;
 209     else if (strcasecmp(format, "float32le") == 0)
 210         return PA_SAMPLE_FLOAT32LE;
 211     else if (strcasecmp(format, "float32be") == 0)
 212         return PA_SAMPLE_FLOAT32BE;
 213     else if (strcasecmp(format, "ulaw") == 0 || strcasecmp(format, "mulaw") == 0)
 214         return PA_SAMPLE_ULAW;
 215     else if (strcasecmp(format, "alaw") == 0)
 216         return PA_SAMPLE_ALAW;
 217     else if (strcasecmp(format, "s32le") == 0)
 218         return PA_SAMPLE_S32LE;
 219     else if (strcasecmp(format, "s32be") == 0)
 220         return PA_SAMPLE_S32BE;
 221     else if (strcasecmp(format, "s32ne") == 0 || strcasecmp(format, "s32") == 0 || strcasecmp(format, "32") == 0)
 222         return PA_SAMPLE_S32NE;
 223     else if (strcasecmp(format, "s32re") == 0)
 224         return PA_SAMPLE_S24RE;
 225     else if (strcasecmp(format, "s24le") == 0)
 226         return PA_SAMPLE_S24LE;
 227     else if (strcasecmp(format, "s24be") == 0)
 228         return PA_SAMPLE_S24BE;
 229     else if (strcasecmp(format, "s24ne") == 0 || strcasecmp(format, "s24") == 0 || strcasecmp(format, "24") == 0)
 230         return PA_SAMPLE_S24NE;
 231     else if (strcasecmp(format, "s24re") == 0)
 232         return PA_SAMPLE_S24RE;
 233     else if (strcasecmp(format, "s24-32le") == 0)
 234         return PA_SAMPLE_S24LE;
 235     else if (strcasecmp(format, "s24-32be") == 0)
 236         return PA_SAMPLE_S24BE;
 237     else if (strcasecmp(format, "s24-32ne") == 0 || strcasecmp(format, "s24-32") == 0)
 238         return PA_SAMPLE_S24NE;
 239     else if (strcasecmp(format, "s24-32re") == 0)
 240         return PA_SAMPLE_S24RE;
 241
 242     return -1;
 243 }