2 * Copyright (C) 2014 Collabora Ltd.
3 * Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
22 #ifndef __V4L2_UTILS_H__
23 #define __V4L2_UTILS_H__
29 #define GST_V4L2_ERROR_INIT { NULL, NULL }
30 #define GST_V4L2_ERROR(v4l2err,domain,code,msg,dbg) \
33 gchar *_msg = _gst_element_error_printf msg; \
34 v4l2err->error = g_error_new_literal (GST_##domain##_ERROR, \
35 GST_##domain##_ERROR_##code, _msg); \
37 v4l2err->dbg_message = _gst_element_error_printf dbg; \
38 v4l2err->file = __FILE__; \
39 v4l2err->func = GST_FUNCTION; \
40 v4l2err->line = __LINE__; \
46 * @_dcaps: The device capabilities
48 * Checks if the device caps represent an M2M device. Note that modern M2M
49 * devices uses V4L2_CAP_VIDEO_M2M* flag, but legacy uses to set both CAPTURE
50 * and OUTPUT flags instead.
52 * Returns: %TRUE if this is a M2M device.
54 #define GST_V4L2_IS_M2M(_dcaps) \
55 (((_dcaps) & (V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE)) ||\
57 (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_CAPTURE_MPLANE)) && \
59 (V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE))))
62 typedef struct _GstV4l2Iterator GstV4l2Iterator;
63 typedef struct _GstV4l2Error GstV4l2Error;
65 struct _GstV4l2Iterator
67 const gchar *device_path;
68 const gchar *device_name;
69 const gchar *sys_path;
81 GstV4l2Iterator * gst_v4l2_iterator_new (void);
82 gboolean gst_v4l2_iterator_next (GstV4l2Iterator *it);
83 void gst_v4l2_iterator_free (GstV4l2Iterator *it);
85 const gchar * gst_v4l2_iterator_get_device_path (GstV4l2Iterator *it);
86 const gchar * gst_v4l2_iterator_get_device_name (GstV4l2Iterator *it);
87 const gchar * gst_v4l2_iterator_get_sys_path (GstV4l2Iterator *it);
89 void gst_v4l2_clear_error (GstV4l2Error *error);
90 void gst_v4l2_error (gpointer element, GstV4l2Error *error);
94 #endif /* __V4L2_UTILS_H__ */