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_get_channels(pa_format_info *f, uint8_t *channels) {
  78     int r;
  79     int channels_local;
  80
  81     pa_assert(f);
  82     pa_assert(channels);
  83
  84     r = pa_format_info_get_prop_int(f, PA_PROP_FORMAT_CHANNELS, &channels_local);
  85     if (r < 0)
  86         return r;
  87
  88     if (!pa_channels_valid(channels_local)) {
  89         pa_log_debug("Invalid channel count: %i", channels_local);
  90         return -PA_ERR_INVALID;
  91     }
  92
  93     *channels = channels_local;
  94
  95     return 0;
  96 }
  97
  98 int pa_format_info_get_channel_map(pa_format_info *f, pa_channel_map *map) {
  99     int r;
 100     char *map_str;
 101
 102     pa_assert(f);
 103     pa_assert(map);
 104
 105     r = pa_format_info_get_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, &map_str);
 106     if (r < 0)
 107         return r;
 108
 109     map = pa_channel_map_parse(map, map_str);
 110     pa_xfree(map_str);
 111
 112     if (!map) {
 113         pa_log_debug("Failed to parse channel map.");
 114         return -PA_ERR_INVALID;
 115     }
 116
 117     return 0;
 118 }
 119
 120 int pa_format_info_to_sample_spec2(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map, pa_sample_spec *fallback_ss,
 121                                    pa_channel_map *fallback_map) {
 122     int r, r2;
 123     pa_sample_spec ss_local;
 124     pa_channel_map map_local;
 125
 126     pa_assert(f);
 127     pa_assert(ss);
 128     pa_assert(map);
 129     pa_assert(fallback_ss);
 130     pa_assert(fallback_map);
 131
 132     if (!pa_format_info_is_pcm(f))
 133         return pa_format_info_to_sample_spec_fake(f, ss, map);
 134
 135     r = pa_format_info_get_sample_format(f, &ss_local.format);
 136     if (r == -PA_ERR_NOENTITY)
 137         ss_local.format = fallback_ss->format;
 138     else if (r < 0)
 139         return r;
 140
 141     pa_assert(pa_sample_format_valid(ss_local.format));
 142
 143     r = pa_format_info_get_rate(f, &ss_local.rate);
 144     if (r == -PA_ERR_NOENTITY)
 145         ss_local.rate = fallback_ss->rate;
 146     else if (r < 0)
 147         return r;
 148
 149     pa_assert(pa_sample_rate_valid(ss_local.rate));
 150
 151     r = pa_format_info_get_channels(f, &ss_local.channels);
 152     r2 = pa_format_info_get_channel_map(f, &map_local);
 153     if (r == -PA_ERR_NOENTITY && r2 >= 0)
 154         ss_local.channels = map_local.channels;
 155     else if (r == -PA_ERR_NOENTITY)
 156         ss_local.channels = fallback_ss->channels;
 157     else if (r < 0)
 158         return r;
 159
 160     pa_assert(pa_channels_valid(ss_local.channels));
 161
 162     if (r2 >= 0 && map_local.channels != ss_local.channels) {
 163         pa_log_debug("Channel map is not compatible with the sample spec.");
 164         return -PA_ERR_INVALID;
 165     }
 166
 167     if (r2 == -PA_ERR_NOENTITY) {
 168         if (fallback_map->channels == ss_local.channels)
 169             map_local = *fallback_map;
 170         else
 171             pa_channel_map_init_extend(&map_local, ss_local.channels, PA_CHANNEL_MAP_DEFAULT);
 172     } else if (r2 < 0)
 173         return r2;
 174
 175     pa_assert(pa_channel_map_valid(&map_local));
 176     pa_assert(ss_local.channels == map_local.channels);
 177
 178     *ss = ss_local;
 179     *map = map_local;
 180
 181     return 0;
 182 }
 183
 184 int pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
 185     int rate;
 186
 187     pa_assert(f);
 188     pa_assert(ss);
 189
 190     /* Note: When we add support for non-IEC61937 encapsulated compressed
 191      * formats, this function should return a non-zero values for these. */
 192
 193     ss->format = PA_SAMPLE_S16LE;
 194     ss->channels = 2;
 195
 196     if (map)
 197         pa_channel_map_init_stereo(map);
 198
 199     pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate) == 0, -PA_ERR_INVALID);
 200     ss->rate = (uint32_t) rate;
 201
 202     if (f->encoding == PA_ENCODING_EAC3_IEC61937)
 203         ss->rate *= 4;
 204
 205     return 0;
 206 }