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dvbsrc: special case detection when DVB-T and T2 seem valid

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There is no way to tell one over the other when parameters
seem valid for DVB-T and DVB-T2 and the adapter supports
both. Reason to go with the former here is that, from
experience, most DVB-T2 channels out there seem to use
parameters that are not valid for DVB-T, like QAM_256

https://bugzilla.gnome.org/show_bug.cgi?id=765731
This commit is contained in:
Reynaldo H. Verdejo Pinochet 2016-05-15 00:41:12 -07:00
parent 378fdad176
commit 10b020095b
1 changed files with 26 additions and 10 deletions
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36
sys/dvb/gstdvbsrc.c
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@ -2404,16 +2404,32 @@ gst_dvbsrc_guess_delsys (GstDvbSrc * object)
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);
switch (alternatives) {
case 0:
GST_WARNING_OBJECT (object, "Delivery system autodetection provided no "
"valid alternative");
candidate = g_list_last (object->supported_delsys);
break;
case 1:
candidate = g_list_last (valid);
GST_DEBUG_OBJECT (object, "Delivery system autodetection provided only "
"one valid alternative: '%d'", GPOINTER_TO_INT (candidate->data));
break;
default:
/* More than one alternative. Selection based on best guess */
if (g_list_find (valid, GINT_TO_POINTER (SYS_DVBT)) &&
g_list_find (valid, GINT_TO_POINTER (SYS_DVBT2))) {
/* There is no way to tell one over the other when parameters seem valid
* for DVB-T and DVB-T2 and the adapter supports both. Reason to go with
* the former here is that, from experience, most DVB-T2 channels out
* there seem to use parameters that are not valid for DVB-T, like
* QAM_256 */
GST_WARNING_OBJECT (object, "Channel parameters valid for DVB-T and "
"DVB-T2. Choosing DVB-T");
candidate = g_list_find (valid, GINT_TO_POINTER (SYS_DVBT));
} else {
candidate = g_list_last (valid);
}
}
object->delsys = GPOINTER_TO_INT (candidate->data);