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6d9c98ae5a
This introduces a GstV4L2CodecDevice structure and helper to retrieve a list of CODEC device drivers. In order to find the device driver we enumerate all media devices with UDEV. We then get the media controller topology and locate a entity with function encoder or decoder and make sure it is linked to two V4L2 IO entity pointing to the same device node.
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* GStreamer
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* Copyright (C) 2020 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _GST_V4L2_CODEC_DEVICE_H_
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#define _GST_V4L2_CODEC_DEVICE_H_
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#include <gst/gst.h>
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#define GST_TYPE_V4L2_CODEC_DEVICE (_gst_v4l2_codec_device_type)
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#define GST_IS_V4L2_CODEC_DEVICE(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_V4L2_CODEC_DEVICE))
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#define GST_V4L2_CODEC_DEVICE(obj) ((GstV4l2CodecDevice *)(obj))
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typedef struct {
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GstMiniObject mini_object;
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gchar *name;
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guint32 function;
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gchar *media_device_path;
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gchar *video_device_path;
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} GstV4l2CodecDevice;
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GType gst_v4l2_codec_device_get_type (void);
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GList *gst_v4l2_codec_find_devices (void);
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void gst_v4l2_codec_device_list_free (GList *devices);
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#endif /* _GST_V4L2_CODECS_DEVICE_H_ */
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