/* G-Streamer generic V4L2 element
 * Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GST_V4L2ELEMENT_H__
#define __GST_V4L2ELEMENT_H__

#include <gst/gst.h>
#include <gst/xwindowlistener/xwindowlistener.h>

/* Because of some really cool feature in video4linux1, also known as
 * 'not including sys/types.h and sys/time.h', we had to include it
 * ourselves. In all their intelligence, these people decided to fix
 * this in the next version (video4linux2) in such a cool way that it
 * breaks all compilations of old stuff...
 * The real problem is actually that linux/time.h doesn't use proper
 * macro checks before defining types like struct timeval. The proper
 * fix here is to either fuck the kernel header (which is what we do
 * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
 * upstream, which I'll consider doing later on. If you get compiler
 * errors here, check your linux/time.h && sys/time.h header setup.
 */
#include <sys/types.h>
#include <linux/types.h>
#define _LINUX_TIME_H
#define __user
#include <linux/videodev2.h>

/*
 * See bug #135919, the Suse9 (and Mandrake10) videodev2 headers
 * contain a bug where (for userspace applications) the v4l2_buffer
 * struct is not declared, so applications have to declare it.
 * Declaration straightly ripped out from <linux/videodev2.h>.
 */
#ifdef GST_V4L2_MISSING_BUFDECL
struct v4l2_buffer
{
        __u32                   index;
        enum v4l2_buf_type      type;
        __u32                   bytesused;
        __u32                   flags;
        enum v4l2_field         field;
        struct timeval          timestamp;
        struct v4l2_timecode    timecode;
        __u32                   sequence;

        /* memory location */
        enum v4l2_memory        memory;
        union {
                __u32           offset;
                unsigned long   userptr;
        } m;
        __u32                   length;

        __u32                   reserved[2];
};
#endif /* GST_V4L2_MISSING_BUFDECL */


#define GST_TYPE_V4L2ELEMENT \
                (gst_v4l2element_get_type())
#define GST_V4L2ELEMENT(obj) \
                (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_V4L2ELEMENT, GstV4l2Element))
#define GST_V4L2ELEMENT_CLASS(klass) \
                (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_V4L2ELEMENT, GstV4l2ElementClass))
#define GST_IS_V4L2ELEMENT(obj) \
                (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_V4L2ELEMENT))
#define GST_IS_V4L2ELEMENT_CLASS(obj) \
                (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_V4L2ELEMENT))
#define GST_V4L2ELEMENT_GET_CLASS(obj) \
                (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2ELEMENT, GstV4l2ElementClass))


typedef struct _GstV4l2Element          GstV4l2Element;
typedef struct _GstV4l2ElementClass     GstV4l2ElementClass;
typedef struct _GstV4l2Xv               GstV4l2Xv;

struct _GstV4l2Element {
        GstElement element;

        /* the video device */
        char *device;

        /* the video-device's file descriptor */
        gint video_fd;

        /* the video buffer (mmap()'ed) */
        guint8 **buffer;

        /* the video-device's capabilities */
        struct v4l2_capability vcap;

        /* the toys available to us */
        GList *channels;
        GList *norms;
        GList *colors;

        /* X-overlay */
        GstV4l2Xv *xv;
        XID xwindow_id;

        /* properties */
        gchar *norm;
        gchar *channel;
        gulong frequency;
};

struct _GstV4l2ElementClass {
        GstElementClass parent_class;

        /* probed devices */
        GList *devices;

        /* signals */
        void     (*open)            (GstElement  *element,
                                     const gchar *device);
        void     (*close)           (GstElement  *element,
                                     const gchar *device);
};


GType gst_v4l2element_get_type (void);

#endif /* __GST_V4L2ELEMENT_H__ */