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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2011 Intel Corporation
   5   Copyright 2011 Collabora Multimedia
   6   Copyright 2011 Arun Raghavan <arun.raghavan@collabora.co.uk>
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2.1 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <pulse/internal.h>
  29 #include <pulse/xmalloc.h>
  30
  31 #include <pulsecore/core-util.h>
  32 #include <pulsecore/macro.h>
  33
  34 #include "format.h"
  35
  36 pa_format_info* pa_format_info_new(void) {
  37     pa_format_info *f = pa_xnew(pa_format_info, 1);
  38
  39     f->encoding = PA_ENCODING_INVALID;
  40     f->plist = pa_proplist_new();
  41
  42     return f;
  43 }
  44
  45 pa_format_info* pa_format_info_copy(const pa_format_info *src) {
  46     pa_format_info *dest;
  47
  48     pa_assert(src);
  49
  50     dest = pa_xnew(pa_format_info, 1);
  51
  52     dest->encoding = src->encoding;
  53
  54     if (src->plist)
  55         dest->plist = pa_proplist_copy(src->plist);
  56     else
  57         dest->plist = NULL;
  58
  59     return dest;
  60 }
  61
  62 void pa_format_info_free(pa_format_info *f) {
  63     pa_assert(f);
  64
  65     pa_proplist_free(f->plist);
  66     pa_xfree(f);
  67 }
  68
  69 void pa_format_info_free2(pa_format_info *f, void *userdata) {
  70     pa_format_info_free(f);
  71 }
  72
  73 int pa_format_info_valid(pa_format_info *f) {
  74     return (f->encoding >= 0 && f->encoding < PA_ENCODING_MAX && f->plist != NULL);
  75 }
  76
  77 int pa_format_info_is_pcm(pa_format_info *f) {
  78     return f->encoding == PA_ENCODING_PCM;
  79 }
  80
  81 pa_bool_t pa_format_info_is_compatible(pa_format_info *first, pa_format_info *second) {
  82     const char *key;
  83     void *state = NULL;
  84
  85     pa_assert(first);
  86     pa_assert(second);
  87
  88     if (first->encoding != second->encoding)
  89         return FALSE;
  90
  91     while ((key = pa_proplist_iterate(first->plist, &state))) {
  92         const char *value_one, *value_two;
  93
  94         value_one = pa_proplist_gets(first->plist, key);
  95         value_two = pa_proplist_gets(second->plist, key);
  96
  97         if (!value_two || !pa_streq(value_one, value_two))
  98             return FALSE;
  99     }
 100
 101     return TRUE;
 102 }
 103
 104 pa_format_info* pa_format_info_from_sample_spec(pa_sample_spec *ss, pa_channel_map *map) {
 105     char cm[PA_CHANNEL_MAP_SNPRINT_MAX];
 106     pa_format_info *f;
 107
 108     pa_assert(ss && pa_sample_spec_valid(ss));
 109     pa_assert(!map || pa_channel_map_valid(map));
 110
 111     f = pa_format_info_new();
 112     f->encoding = PA_ENCODING_PCM;
 113
 114     pa_proplist_sets(f->plist, PA_PROP_FORMAT_SAMPLE_FORMAT, pa_sample_format_to_string(ss->format));
 115     pa_proplist_setf(f->plist, PA_PROP_FORMAT_RATE, "%u", (unsigned int) ss->rate);
 116     pa_proplist_setf(f->plist, PA_PROP_FORMAT_CHANNELS, "%u", (unsigned int) ss->channels);
 117
 118     if (map) {
 119         pa_channel_map_snprint(cm, sizeof(cm), map);
 120         pa_proplist_setf(f->plist, PA_PROP_FORMAT_CHANNEL_MAP, "%s", cm);
 121     }
 122
 123     return f;
 124 }
 125
 126 /* For PCM streams */
 127 pa_bool_t pa_format_info_to_sample_spec(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
 128     const char *sf, *r, *ch;
 129     uint32_t channels;
 130
 131     pa_assert(f);
 132     pa_assert(ss);
 133     pa_return_val_if_fail(f->encoding == PA_ENCODING_PCM, FALSE);
 134
 135     pa_return_val_if_fail(sf = pa_proplist_gets(f->plist, PA_PROP_FORMAT_SAMPLE_FORMAT), FALSE);
 136     pa_return_val_if_fail(r = pa_proplist_gets(f->plist, PA_PROP_FORMAT_RATE), FALSE);
 137     pa_return_val_if_fail(ch = pa_proplist_gets(f->plist, PA_PROP_FORMAT_CHANNELS), FALSE);
 138
 139     pa_return_val_if_fail((ss->format = pa_parse_sample_format(sf)) != PA_SAMPLE_INVALID, FALSE);
 140     pa_return_val_if_fail(pa_atou(r, &ss->rate) == 0, FALSE);
 141     pa_return_val_if_fail(pa_atou(ch, &channels) == 0, FALSE);
 142     ss->channels = (uint8_t) channels;
 143
 144     if (map) {
 145         const char *m = pa_proplist_gets(f->plist, PA_PROP_FORMAT_CHANNEL_MAP);
 146         pa_channel_map_init(map);
 147
 148         if (m)
 149             pa_return_val_if_fail(pa_channel_map_parse(map, m) != NULL, FALSE);
 150     }
 151
 152     return TRUE;
 153 }
 154
 155 /* For compressed streams */
 156 pa_bool_t pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss) {
 157     const char *r;
 158
 159     pa_assert(f);
 160     pa_assert(ss);
 161     pa_return_val_if_fail(f->encoding != PA_ENCODING_PCM, FALSE);
 162
 163     ss->format = PA_SAMPLE_S16LE;
 164     ss->channels = 2;
 165
 166     pa_return_val_if_fail(r = pa_proplist_gets(f->plist, PA_PROP_FORMAT_RATE), FALSE);
 167     pa_return_val_if_fail(pa_atou(r, &ss->rate) == 0, FALSE);
 168
 169     return TRUE;
 170 }