src/misc/renderer_discovery.c

   1 /*****************************************************************************
   2  * renderer_discovery.c : Renderer Discovery functions
   3  *****************************************************************************
   4  * Copyright(C) 2016 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  *(at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <stdatomic.h>
  26 #include <assert.h>
  27
  28 #include <vlc_common.h>
  29 #include <vlc_renderer_discovery.h>
  30 #include <vlc_probe.h>
  31 #include <vlc_modules.h>
  32 #include <libvlc.h>
  33
  34 struct vlc_renderer_item_t
  35 {
  36     char *psz_name;
  37     char *psz_type;
  38     char *psz_sout;
  39     char *psz_icon_uri;
  40     char *psz_demux_filter;
  41     int i_flags;
  42     atomic_uint refs;
  43 };
  44
  45 static void
  46 item_free(vlc_renderer_item_t *p_item)
  47 {
  48     free(p_item->psz_name);
  49     free(p_item->psz_type);
  50     free(p_item->psz_sout);
  51     free(p_item->psz_icon_uri);
  52     free(p_item->psz_demux_filter);
  53     free(p_item);
  54 }
  55
  56 vlc_renderer_item_t *
  57 vlc_renderer_item_new(const char *psz_type, const char *psz_name,
  58                       const char *psz_uri, const char *psz_extra_sout,
  59                       const char *psz_demux_filter, const char *psz_icon_uri,
  60                       int i_flags)
  61 {
  62     assert(psz_uri != NULL);
  63     vlc_renderer_item_t *p_item = NULL;
  64     vlc_url_t url;
  65     vlc_UrlParse(&url, psz_uri);
  66
  67     if (url.psz_protocol == NULL || url.psz_host == NULL)
  68         goto error;
  69
  70     p_item = calloc(1, sizeof(vlc_renderer_item_t));
  71     if (unlikely(p_item == NULL))
  72         goto error;
  73
  74     if ((p_item->psz_type = strdup(psz_type)) == NULL)
  75         goto error;
  76
  77     if (psz_name != NULL)
  78         p_item->psz_name = strdup(psz_name);
  79     else if (asprintf(&p_item->psz_name, "%s (%s)", url.psz_protocol,
  80                       url.psz_host) == -1)
  81         p_item->psz_name = NULL;
  82     if (p_item->psz_name == NULL)
  83         goto error;
  84
  85     if (asprintf(&p_item->psz_sout, "%s{ip=%s,port=%d%s%s}",
  86                  url.psz_protocol, url.psz_host, url.i_port,
  87                  psz_extra_sout != NULL ? "," : "",
  88                  psz_extra_sout != NULL ? psz_extra_sout : "") == -1)
  89         goto error;
  90
  91     if (psz_icon_uri && (p_item->psz_icon_uri = strdup(psz_icon_uri)) == NULL)
  92         goto error;
  93
  94     if (psz_demux_filter && (p_item->psz_demux_filter = strdup(psz_demux_filter)) == NULL)
  95         goto error;
  96
  97     p_item->i_flags = i_flags;
  98     atomic_init(&p_item->refs, 1);
  99     vlc_UrlClean(&url);
 100     return p_item;
 101
 102 error:
 103     vlc_UrlClean(&url);
 104     if (p_item != NULL)
 105         item_free(p_item);
 106     return NULL;
 107 }
 108
 109 const char *
 110 vlc_renderer_item_name(const vlc_renderer_item_t *p_item)
 111 {
 112     assert(p_item != NULL);
 113
 114     return p_item->psz_name;
 115 }
 116
 117 const char *
 118 vlc_renderer_item_type(const vlc_renderer_item_t *p_item)
 119 {
 120     assert(p_item != NULL);
 121
 122     return p_item->psz_type;
 123 }
 124
 125 const char *
 126 vlc_renderer_item_sout(const vlc_renderer_item_t *p_item)
 127 {
 128     assert(p_item != NULL);
 129
 130     return p_item->psz_sout;
 131 }
 132
 133 const char *
 134 vlc_renderer_item_icon_uri(const vlc_renderer_item_t *p_item)
 135 {
 136     assert(p_item != NULL);
 137
 138     return p_item->psz_icon_uri;
 139 }
 140
 141 const char *
 142 vlc_renderer_item_demux_filter(const vlc_renderer_item_t *p_item)
 143 {
 144     assert(p_item != NULL);
 145
 146     return p_item->psz_demux_filter;
 147 }
 148
 149 int
 150 vlc_renderer_item_flags(const vlc_renderer_item_t *p_item)
 151 {
 152     assert(p_item != NULL);
 153
 154     return p_item->i_flags;
 155 }
 156
 157 vlc_renderer_item_t *
 158 vlc_renderer_item_hold(vlc_renderer_item_t *p_item)
 159 {
 160     assert(p_item != NULL);
 161
 162     atomic_fetch_add(&p_item->refs, 1);
 163     return p_item;
 164 }
 165
 166 void
 167 vlc_renderer_item_release(vlc_renderer_item_t *p_item)
 168 {
 169     assert(p_item != NULL);
 170
 171     int refs = atomic_fetch_sub(&p_item->refs, 1);
 172     assert(refs != 0 );
 173     if( refs != 1 )
 174         return;
 175     item_free(p_item);
 176 }
 177
 178 struct vlc_rd_probe
 179 {
 180     char *psz_name;
 181     char *psz_longname;
 182 };
 183
 184 int
 185 vlc_rd_probe_add(vlc_probe_t *probe, const char *psz_name,
 186                  const char *psz_longname)
 187 {
 188     struct vlc_rd_probe names = { strdup(psz_name), strdup(psz_longname) };
 189
 190     if (unlikely(names.psz_name == NULL || names.psz_longname == NULL
 191                  || vlc_probe_add(probe, &names, sizeof(names))))
 192     {
 193         free(names.psz_name);
 194         free(names.psz_longname);
 195         return VLC_ENOMEM;
 196     }
 197     return VLC_PROBE_CONTINUE;
 198 }
 199
 200 #undef vlc_rd_get_names
 201 int
 202 vlc_rd_get_names(vlc_object_t *p_obj, char ***pppsz_names,
 203                  char ***pppsz_longnames)
 204 {
 205     size_t i_count;
 206     struct vlc_rd_probe *p_tab = vlc_probe(p_obj, "renderer probe", &i_count);
 207
 208     if (i_count == 0)
 209     {
 210         free(p_tab);
 211         return VLC_EGENERIC;
 212     }
 213
 214     char **ppsz_names = vlc_alloc(i_count + 1, sizeof(char *));
 215     char **ppsz_longnames = vlc_alloc(i_count + 1, sizeof(char *));
 216
 217     if (unlikely(ppsz_names == NULL || ppsz_longnames == NULL))
 218     {
 219         free(ppsz_names);
 220         free(ppsz_longnames);
 221         free(p_tab);
 222         return VLC_EGENERIC;
 223     }
 224
 225     for (size_t i = 0; i < i_count; i++)
 226     {
 227         ppsz_names[i] = p_tab[i].psz_name;
 228         ppsz_longnames[i] = p_tab[i].psz_longname;
 229     }
 230     ppsz_names[i_count] = ppsz_longnames[i_count] = NULL;
 231     free(p_tab);
 232     *pppsz_names = ppsz_names;
 233     *pppsz_longnames = ppsz_longnames;
 234     return VLC_SUCCESS;
 235 }
 236
 237 void vlc_rd_release(vlc_renderer_discovery_t *p_rd)
 238 {
 239     module_unneed(p_rd, p_rd->p_module);
 240     config_ChainDestroy(p_rd->p_cfg);
 241     free(p_rd->psz_name);
 242     vlc_object_release(p_rd);
 243 }
 244
 245 vlc_renderer_discovery_t *
 246 vlc_rd_new(vlc_object_t *p_obj, const char *psz_name,
 247            const struct vlc_renderer_discovery_owner *restrict owner)
 248 {
 249     vlc_renderer_discovery_t *p_rd;
 250
 251     p_rd = vlc_custom_create(p_obj, sizeof(*p_rd), "renderer discovery");
 252     if(!p_rd)
 253         return NULL;
 254     free(config_ChainCreate(&p_rd->psz_name, &p_rd->p_cfg, psz_name));
 255
 256     p_rd->owner = *owner;
 257     p_rd->p_module = module_need(p_rd, "renderer_discovery",
 258                                  p_rd->psz_name, true);
 259     if (p_rd->p_module == NULL)
 260     {
 261         msg_Err(p_rd, "no suitable renderer discovery module for '%s'",
 262             psz_name);
 263         free(p_rd->psz_name);
 264         config_ChainDestroy(p_rd->p_cfg);
 265         vlc_object_release(p_rd);
 266         p_rd = NULL;
 267     }
 268
 269     return p_rd;
 270 }