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v4l2-util: Introduce GstV4l2Error

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This is to allow returning an error that can easily be sent as
message to the application if the element needs it. Using this
also allow ignoring errors.

https://bugzilla.gnome.org/show_bug.cgi?id=766172
This commit is contained in:
Nicolas Dufresne 2016-06-07 16:01:55 -04:00
parent ec169a1517
commit e228430788
2 changed files with 63 additions and 0 deletions
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35
sys/v4l2/v4l2-utils.c
View file

@ -164,3 +164,38 @@ gst_v4l2_iterator_free (GstV4l2Iterator * _it)
}
#endif
void
gst_v4l2_clear_error (GstV4l2Error * v4l2err)
{
if (v4l2err) {
g_clear_error (&v4l2err->error);
g_free (v4l2err->dbg_message);
}
}
void
gst_v4l2_error (gpointer element, GstV4l2Error * v4l2err)
{
GError *error;
if (!v4l2err || !v4l2err->error)
return;
error = v4l2err->error;
if (error->message)
GST_WARNING_OBJECT (element, "error: %s", error->message);
if (v4l2err->dbg_message)
GST_WARNING_OBJECT (element, "error: %s", v4l2err->dbg_message);
gst_element_message_full (GST_ELEMENT (element), GST_MESSAGE_ERROR,
error->domain, error->code, error->message, v4l2err->dbg_message,
v4l2err->file, v4l2err->func, v4l2err->line);
error->message = NULL;
v4l2err->dbg_message = NULL;
gst_v4l2_clear_error (v4l2err);
}

28
sys/v4l2/v4l2-utils.h
View file

@ -26,7 +26,23 @@
G_BEGIN_DECLS
#define GST_V4L2_ERROR_INIT { NULL, NULL }
#define GST_V4L2_ERROR(v4l2err,domain,code,msg,dbg) \
{\
if (v4l2err) { \
gchar *_msg = _gst_element_error_printf msg; \
v4l2err->error = g_error_new_literal (GST_##domain##_ERROR, \
GST_##domain##_ERROR_##code, _msg); \
g_free (_msg); \
v4l2err->dbg_message = _gst_element_error_printf dbg; \
v4l2err->file = __FILE__; \
v4l2err->func = GST_FUNCTION; \
v4l2err->line = __LINE__; \
} \
}
typedef struct _GstV4l2Iterator GstV4l2Iterator;
typedef struct _GstV4l2Error GstV4l2Error;
struct _GstV4l2Iterator
{
@ -35,6 +51,15 @@ struct _GstV4l2Iterator
const gchar *sys_path;
};
struct _GstV4l2Error
{
GError *error;
gchar *dbg_message;
const gchar *file;
const gchar *func;
gint line;
};
GstV4l2Iterator * gst_v4l2_iterator_new (void);
gboolean gst_v4l2_iterator_next (GstV4l2Iterator *it);
void gst_v4l2_iterator_free (GstV4l2Iterator *it);
@ -43,6 +68,9 @@ const gchar * gst_v4l2_iterator_get_device_path (GstV4l2Iterator *it);
const gchar * gst_v4l2_iterator_get_device_name (GstV4l2Iterator *it);
const gchar * gst_v4l2_iterator_get_sys_path (GstV4l2Iterator *it);
void gst_v4l2_clear_error (GstV4l2Error *error);
void gst_v4l2_error (gpointer element, GstV4l2Error *error);
G_END_DECLS
#endif /* __V4L2_UTILS_H__ */