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115 lines
4 KiB
C
115 lines
4 KiB
C
/* G-Streamer generic V4L2 element
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* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_V4L2ELEMENT_H__
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#define __GST_V4L2ELEMENT_H__
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#include <gst/gst.h>
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/* Because of some really cool feature in video4linux1, also known as
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* 'not including sys/types.h and sys/time.h', we had to include it
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* ourselves. In all their intelligence, these people decided to fix
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* this in the next version (video4linux2) in such a cool way that it
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* breaks all compilations of old stuff...
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* The real problem is actually that linux/time.h doesn't use proper
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* macro checks before defining types like struct timeval. The proper
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* fix here is to either fuck the kernel header (which is what we do
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* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
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* upstream, which I'll consider doing later on. If you get compiler
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* errors here, check your linux/time.h && sys/time.h header setup.
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*/
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#include <sys/types.h>
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#include <linux/types.h>
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#define _LINUX_TIME_H
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#include <linux/videodev2.h>
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#define GST_TYPE_V4L2ELEMENT \
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(gst_v4l2element_get_type())
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#define GST_V4L2ELEMENT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_V4L2ELEMENT, GstV4l2Element))
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#define GST_V4L2ELEMENT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_V4L2ELEMENT, GstV4l2ElementClass))
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#define GST_IS_V4L2ELEMENT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_V4L2ELEMENT))
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#define GST_IS_V4L2ELEMENT_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_V4L2ELEMENT))
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typedef struct _GstV4l2Element GstV4l2Element;
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typedef struct _GstV4l2ElementClass GstV4l2ElementClass;
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struct _GstV4l2Element {
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GstElement element;
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/* the video device */
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char *device;
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/* the video-device's file descriptor */
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gint video_fd;
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/* the video buffer (mmap()'ed) */
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guint8 **buffer;
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/* the video-device's capabilities */
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struct v4l2_capability vcap;
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/* the toys available to us */
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GList /*v4l2_input*/ *inputs, *input_names;
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GList /*v4l2_output*/ *outputs, *output_names;
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GList /*v4l2_enumstd*/ *norms, *norm_names;
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GList /*v4l2_queryctrl*/ *controls, *control_specs;
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GList /*GList:v4l2_querymenu*/ *menus;
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/* caching values */
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gint channel;
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gint output;
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gint norm;
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gulong frequency;
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};
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struct _GstV4l2ElementClass {
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GstElementClass parent_class;
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/* signals */
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void (*open) (GstElement *element,
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const gchar *device);
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void (*close) (GstElement *element,
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const gchar *device);
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/* actions */
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gboolean (*set_videowindow) (GstElement *element,
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gint x_offset,
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gint y_offset,
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gint height,
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gint width,
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struct v4l2_clip *clips,
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gint num_clips);
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gboolean (*get_attribute) (GstElement *element,
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const gchar *attr_name,
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int *value);
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gboolean (*set_attribute) (GstElement *element,
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const gchar *attr_name,
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const int value);
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};
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GType gst_v4l2element_get_type (void);
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#endif /* __GST_V4L2ELEMENT_H__ */
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