code.delx.au - pulseaudio/blob - src/pulsecore/core-format.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   PulseAudio is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU Lesser General Public License as published
   6   by the Free Software Foundation; either version 2.1 of the License,
   7   or (at your option) any later version.
   8
   9   PulseAudio is distributed in the hope that it will be useful, but
  10   WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12   General Public License for more details.
  13
  14   You should have received a copy of the GNU Lesser General Public License
  15   along with PulseAudio; if not, write to the Free Software
  16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  17   USA.
  18 ***/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include "core-format.h"
  25
  26 #include <pulse/def.h>
  27 #include <pulse/xmalloc.h>
  28
  29 #include <pulsecore/macro.h>
  30
  31 int pa_format_info_get_sample_format(pa_format_info *f, pa_sample_format_t *sf) {
  32     int r;
  33     char *sf_str;
  34     pa_sample_format_t sf_local;
  35
  36     pa_assert(f);
  37     pa_assert(sf);
  38
  39     r = pa_format_info_get_prop_string(f, PA_PROP_FORMAT_SAMPLE_FORMAT, &sf_str);
  40     if (r < 0)
  41         return r;
  42
  43     sf_local = pa_parse_sample_format(sf_str);
  44     pa_xfree(sf_str);
  45
  46     if (!pa_sample_format_valid(sf_local)) {
  47         pa_log_debug("Invalid sample format.");
  48         return -PA_ERR_INVALID;
  49     }
  50
  51     *sf = sf_local;
  52
  53     return 0;
  54 }
  55
  56 int pa_format_info_get_rate(pa_format_info *f, uint32_t *rate) {
  57     int r;
  58     int rate_local;
  59
  60     pa_assert(f);
  61     pa_assert(rate);
  62
  63     r = pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate_local);
  64     if (r < 0)
  65         return r;
  66
  67     if (!pa_sample_rate_valid(rate_local)) {
  68         pa_log_debug("Invalid sample rate: %i", rate_local);
  69         return -PA_ERR_INVALID;
  70     }
  71
  72     *rate = rate_local;
  73
  74     return 0;
  75 }
  76
  77 int pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
  78     int rate;
  79
  80     pa_assert(f);
  81     pa_assert(ss);
  82
  83     /* Note: When we add support for non-IEC61937 encapsulated compressed
  84      * formats, this function should return a non-zero values for these. */
  85
  86     ss->format = PA_SAMPLE_S16LE;
  87     ss->channels = 2;
  88
  89     if (map)
  90         pa_channel_map_init_stereo(map);
  91
  92     pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate) == 0, -PA_ERR_INVALID);
  93     ss->rate = (uint32_t) rate;
  94
  95     if (f->encoding == PA_ENCODING_EAC3_IEC61937)
  96         ss->rate *= 4;
  97
  98     return 0;
  99 }