mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-06-07 07:58:51 +00:00
Code Issues 1 Projects Releases Wiki Activity

dvbsrc: improve delivery system autodetection

Browse source
This commit is contained in:
Reynaldo H. Verdejo Pinochet 2016-05-12 16:43:09 -07:00
parent 793c1a2423
commit 15e21fee71
1 changed files with 37 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
sys/dvb/gstdvbsrc.c
View file

@ -2339,26 +2339,47 @@ fail:
static void static void
gst_dvbsrc_guess_delsys (GstDvbSrc * object) gst_dvbsrc_guess_delsys (GstDvbSrc * object)
{ {
GList *delsys; GList *valid, *candidate;
guint alternatives;
/* If adapter only supports one delivery system, there's no real choice */ if (g_list_length (object->supported_delsys) == 1) {
if (g_list_length (object->supported_delsys) == 1) object->delsys = GPOINTER_TO_INT (object->supported_delsys->data);
goto go_with_default; GST_DEBUG_OBJECT (object, "Adapter supports a single delsys: '%u'",
object->delsys);
/* Add delivery system specific rules here */
/* DVB-T/T2 on QAM_256 channel? has to be DVB-T2 */
if (object->modulation == QAM_256 &&
g_list_find (object->supported_delsys, GINT_TO_POINTER (SYS_DVBT2))) {
object->delsys = SYS_DVBT2;
goto autoselection_done; goto autoselection_done;
} }
/* No rule provided a match so we default to the last device-reported /* Automatic delivery system selection based on known-correct
* supported delivery system */ * parameter combinations */
go_with_default:
delsys = g_list_last (object->supported_delsys); valid = g_list_copy (object->supported_delsys);
object->delsys = GPOINTER_TO_INT (delsys->data);
candidate = valid;
while (candidate) {
GList *next = candidate->next;
if (!gst_dvbsrc_is_valid_modulation (GPOINTER_TO_INT (candidate->data),
object->modulation)) {
valid = g_list_delete_link (valid, candidate);
}
candidate = next;
}
alternatives = g_list_length (valid);
if (!alternatives) {
GST_WARNING_OBJECT (object, "Delivery system autodetection provided no "
"valid alternative");
candidate = g_list_last (object->supported_delsys);
} else {
if (alternatives > 1) {
GST_WARNING_OBJECT (object, "Delivery system autodetection provided more "
"than one valid alternative");
}
candidate = g_list_last (valid);
}
object->delsys = GPOINTER_TO_INT (candidate->data);
g_list_free (valid);
autoselection_done: autoselection_done:
GST_INFO_OBJECT (object, "Automatically selecting delivery system '%u'", GST_INFO_OBJECT (object, "Automatically selecting delivery system '%u'",