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 2.1 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 <string.h>
  29
  30 #include <pulse/timeval.h>
  31
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/i18n.h>
  34 #include <pulsecore/macro.h>
  35
  36 #include "sample.h"
  37
  38 static const size_t size_table[] = {
  39     [PA_SAMPLE_U8] = 1,
  40     [PA_SAMPLE_ULAW] = 1,
  41     [PA_SAMPLE_ALAW] = 1,
  42     [PA_SAMPLE_S16LE] = 2,
  43     [PA_SAMPLE_S16BE] = 2,
  44     [PA_SAMPLE_FLOAT32LE] = 4,
  45     [PA_SAMPLE_FLOAT32BE] = 4,
  46     [PA_SAMPLE_S32LE] = 4,
  47     [PA_SAMPLE_S32BE] = 4,
  48     [PA_SAMPLE_S24LE] = 3,
  49     [PA_SAMPLE_S24BE] = 3,
  50     [PA_SAMPLE_S24_32LE] = 4,
  51     [PA_SAMPLE_S24_32BE] = 4
  52 };
  53
  54 size_t pa_sample_size_of_format(pa_sample_format_t f) {
  55     pa_assert(f >= 0);
  56     pa_assert(f < PA_SAMPLE_MAX);
  57
  58     return size_table[f];
  59 }
  60
  61 size_t pa_sample_size(const pa_sample_spec *spec) {
  62
  63     pa_assert(spec);
  64     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  65
  66     return size_table[spec->format];
  67 }
  68
  69 size_t pa_frame_size(const pa_sample_spec *spec) {
  70     pa_assert(spec);
  71     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  72
  73     return size_table[spec->format] * spec->channels;
  74 }
  75
  76 size_t pa_bytes_per_second(const pa_sample_spec *spec) {
  77     pa_assert(spec);
  78     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  79
  80     return spec->rate * size_table[spec->format] * spec->channels;
  81 }
  82
  83 pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
  84     pa_assert(spec);
  85     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  86
  87     return (((pa_usec_t) (length / (size_table[spec->format] * spec->channels)) * PA_USEC_PER_SEC) / spec->rate);
  88 }
  89
  90 size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
  91     pa_assert(spec);
  92     pa_return_val_if_fail(pa_sample_spec_valid(spec), 0);
  93
  94     return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) * (size_table[spec->format] * spec->channels);
  95 }
  96
  97 pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) {
  98     pa_assert(spec);
  99
 100     spec->format = PA_SAMPLE_INVALID;
 101     spec->rate = 0;
 102     spec->channels = 0;
 103
 104     return spec;
 105 }
 106
 107 int pa_sample_spec_valid(const pa_sample_spec *spec) {
 108     pa_assert(spec);
 109
 110     if (PA_UNLIKELY (spec->rate <= 0 ||
 111         spec->rate > PA_RATE_MAX ||
 112         spec->channels <= 0 ||
 113         spec->channels > PA_CHANNELS_MAX ||
 114         spec->format >= PA_SAMPLE_MAX ||
 115         spec->format < 0))
 116         return 0;
 117
 118     return 1;
 119 }
 120
 121 int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
 122     pa_assert(a);
 123     pa_assert(b);
 124
 125     pa_return_val_if_fail(pa_sample_spec_valid(a), 0);
 126
 127     if (PA_UNLIKELY(a == b))
 128         return 1;
 129
 130     pa_return_val_if_fail(pa_sample_spec_valid(b), 0);
 131
 132     return
 133         (a->format == b->format) &&
 134         (a->rate == b->rate) &&
 135         (a->channels == b->channels);
 136 }
 137
 138 const char *pa_sample_format_to_string(pa_sample_format_t f) {
 139     static const char* const table[]= {
 140         [PA_SAMPLE_U8] = "u8",
 141         [PA_SAMPLE_ALAW] = "aLaw",
 142         [PA_SAMPLE_ULAW] = "uLaw",
 143         [PA_SAMPLE_S16LE] = "s16le",
 144         [PA_SAMPLE_S16BE] = "s16be",
 145         [PA_SAMPLE_FLOAT32LE] = "float32le",
 146         [PA_SAMPLE_FLOAT32BE] = "float32be",
 147         [PA_SAMPLE_S32LE] = "s32le",
 148         [PA_SAMPLE_S32BE] = "s32be",
 149         [PA_SAMPLE_S24LE] = "s24le",
 150         [PA_SAMPLE_S24BE] = "s24be",
 151         [PA_SAMPLE_S24_32LE] = "s24-32le",
 152         [PA_SAMPLE_S24_32BE] = "s24-32be",
 153     };
 154
 155     if (f < 0 || f >= PA_SAMPLE_MAX)
 156         return NULL;
 157
 158     return table[f];
 159 }
 160
 161 char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
 162     pa_assert(s);
 163     pa_assert(l > 0);
 164     pa_assert(spec);
 165
 166     pa_init_i18n();
 167
 168     if (!pa_sample_spec_valid(spec))
 169         pa_snprintf(s, l, _("(invalid)"));
 170     else
 171         pa_snprintf(s, l, _("%s %uch %uHz"), pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
 172
 173     return s;
 174 }
 175
 176 char* pa_bytes_snprint(char *s, size_t l, unsigned v) {
 177     pa_assert(s);
 178     pa_assert(l > 0);
 179
 180     pa_init_i18n();
 181
 182     if (v >= ((unsigned) 1024)*1024*1024)
 183         pa_snprintf(s, l, _("%0.1f GiB"), ((double) v)/1024/1024/1024);
 184     else if (v >= ((unsigned) 1024)*1024)
 185         pa_snprintf(s, l, _("%0.1f MiB"), ((double) v)/1024/1024);
 186     else if (v >= (unsigned) 1024)
 187         pa_snprintf(s, l, _("%0.1f KiB"), ((double) v)/1024);
 188     else
 189         pa_snprintf(s, l, _("%u B"), (unsigned) v);
 190
 191     return s;
 192 }
 193
 194 pa_sample_format_t pa_parse_sample_format(const char *format) {
 195     pa_assert(format);
 196
 197     if (strcasecmp(format, "s16le") == 0)
 198         return PA_SAMPLE_S16LE;
 199     else if (strcasecmp(format, "s16be") == 0)
 200         return PA_SAMPLE_S16BE;
 201     else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
 202         return PA_SAMPLE_S16NE;
 203     else if (strcasecmp(format, "s16re") == 0)
 204         return PA_SAMPLE_S16RE;
 205     else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
 206         return PA_SAMPLE_U8;
 207     else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0 || strcasecmp(format, "float") == 0)
 208         return PA_SAMPLE_FLOAT32NE;
 209     else if (strcasecmp(format, "float32re") == 0)
 210         return PA_SAMPLE_FLOAT32RE;
 211     else if (strcasecmp(format, "float32le") == 0)
 212         return PA_SAMPLE_FLOAT32LE;
 213     else if (strcasecmp(format, "float32be") == 0)
 214         return PA_SAMPLE_FLOAT32BE;
 215     else if (strcasecmp(format, "ulaw") == 0 || strcasecmp(format, "mulaw") == 0)
 216         return PA_SAMPLE_ULAW;
 217     else if (strcasecmp(format, "alaw") == 0)
 218         return PA_SAMPLE_ALAW;
 219     else if (strcasecmp(format, "s32le") == 0)
 220         return PA_SAMPLE_S32LE;
 221     else if (strcasecmp(format, "s32be") == 0)
 222         return PA_SAMPLE_S32BE;
 223     else if (strcasecmp(format, "s32ne") == 0 || strcasecmp(format, "s32") == 0 || strcasecmp(format, "32") == 0)
 224         return PA_SAMPLE_S32NE;
 225     else if (strcasecmp(format, "s32re") == 0)
 226         return PA_SAMPLE_S24RE;
 227     else if (strcasecmp(format, "s24le") == 0)
 228         return PA_SAMPLE_S24LE;
 229     else if (strcasecmp(format, "s24be") == 0)
 230         return PA_SAMPLE_S24BE;
 231     else if (strcasecmp(format, "s24ne") == 0 || strcasecmp(format, "s24") == 0 || strcasecmp(format, "24") == 0)
 232         return PA_SAMPLE_S24NE;
 233     else if (strcasecmp(format, "s24re") == 0)
 234         return PA_SAMPLE_S24RE;
 235     else if (strcasecmp(format, "s24-32le") == 0)
 236         return PA_SAMPLE_S24_32LE;
 237     else if (strcasecmp(format, "s24-32be") == 0)
 238         return PA_SAMPLE_S24_32BE;
 239     else if (strcasecmp(format, "s24-32ne") == 0 || strcasecmp(format, "s24-32") == 0)
 240         return PA_SAMPLE_S24_32NE;
 241     else if (strcasecmp(format, "s24-32re") == 0)
 242         return PA_SAMPLE_S24_32RE;
 243
 244     return PA_SAMPLE_INVALID;
 245 }
 246
 247 int pa_sample_format_is_le(pa_sample_format_t f) {
 248     pa_assert(f >= PA_SAMPLE_U8);
 249     pa_assert(f < PA_SAMPLE_MAX);
 250
 251     switch (f) {
 252         case PA_SAMPLE_S16LE:
 253         case PA_SAMPLE_S24LE:
 254         case PA_SAMPLE_S32LE:
 255         case PA_SAMPLE_S24_32LE:
 256         case PA_SAMPLE_FLOAT32LE:
 257             return 1;
 258
 259         case PA_SAMPLE_S16BE:
 260         case PA_SAMPLE_S24BE:
 261         case PA_SAMPLE_S32BE:
 262         case PA_SAMPLE_S24_32BE:
 263         case PA_SAMPLE_FLOAT32BE:
 264             return 0;
 265
 266         default:
 267             return -1;
 268     }
 269 }
 270
 271 int pa_sample_format_is_be(pa_sample_format_t f) {
 272     int r;
 273
 274     if ((r = pa_sample_format_is_le(f)) < 0)
 275         return r;
 276
 277     return !r;
 278 }