code.delx.au - pulseaudio/blob - polyp/sample.h

   1 #ifndef foosamplehfoo
   2 #define foosamplehfoo
   3
   4 /* $Id$ */
   5
   6 /***
   7   This file is part of polypaudio.
   8
   9   polypaudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU 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.
  13
  14   polypaudio 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.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with polypaudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #include <inttypes.h>
  26 #include <sys/types.h>
  27
  28 enum pa_sample_format {
  29     PA_SAMPLE_U8,
  30     PA_SAMPLE_ALAW,
  31     PA_SAMPLE_ULAW,
  32     PA_SAMPLE_S16LE,
  33     PA_SAMPLE_S16BE,
  34     PA_SAMPLE_FLOAT32LE,
  35     PA_SAMPLE_FLOAT32BE,
  36     PA_SAMPLE_MAX
  37 };
  38
  39 #ifdef WORDS_BIGENDIAN
  40 #define PA_SAMPLE_S16NE PA_SAMPLE_S16BE
  41 #define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32BE
  42 #else
  43 #define PA_SAMPLE_S16NE PA_SAMPLE_S16LE
  44 #define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32LE
  45 #endif
  46 #define PA_SAMPLE_FLOAT32 PA_SAMPLE_FLOAT32NE
  47
  48 struct pa_sample_spec {
  49     enum pa_sample_format format;
  50     uint32_t rate;
  51     uint8_t channels;
  52 };
  53
  54 size_t pa_bytes_per_second(const struct pa_sample_spec *spec);
  55 size_t pa_frame_size(const struct pa_sample_spec *spec);
  56 uint32_t pa_bytes_to_usec(size_t length, const struct pa_sample_spec *spec);
  57 int pa_sample_spec_valid(const struct pa_sample_spec *spec);
  58 int pa_sample_spec_equal(const struct pa_sample_spec*a, const struct pa_sample_spec*b);
  59
  60 #define PA_SAMPLE_SNPRINT_MAX_LENGTH 32
  61 void pa_sample_snprint(char *s, size_t l, const struct pa_sample_spec *spec);
  62
  63 #endif