mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 18:51:11 +00:00
109 lines
3 KiB
C
109 lines
3 KiB
C
/* G-Streamer Video4linux2 video-capture plugin
|
|
* 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_V4L2SRC_H__
|
|
#define __GST_V4L2SRC_H__
|
|
|
|
#include <gstv4l2element.h>
|
|
|
|
GST_DEBUG_CATEGORY_EXTERN (v4l2src_debug);
|
|
|
|
#define GST_V4L2_MAX_BUFFERS 16
|
|
#define GST_V4L2_MIN_BUFFERS 2
|
|
|
|
#define GST_TYPE_V4L2SRC \
|
|
(gst_v4l2src_get_type())
|
|
#define GST_V4L2SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2SRC,GstV4l2Src))
|
|
#define GST_V4L2SRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2SRC,GstV4l2SrcClass))
|
|
#define GST_IS_V4L2SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2SRC))
|
|
#define GST_IS_V4L2SRC_CLASS(obj) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2SRC))
|
|
|
|
typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
|
|
typedef struct _GstV4l2Buffer GstV4l2Buffer;
|
|
typedef struct _GstV4l2Src GstV4l2Src;
|
|
typedef struct _GstV4l2SrcClass GstV4l2SrcClass;
|
|
|
|
/* global info */
|
|
struct _GstV4l2BufferPool {
|
|
GstAtomicInt refcount; /* number of users: 1 for every buffer, 1 for element */
|
|
gint video_fd;
|
|
guint buffer_count;
|
|
GstV4l2Buffer * buffers;
|
|
};
|
|
|
|
struct _GstV4l2Buffer {
|
|
struct v4l2_buffer buffer;
|
|
guint8 * start;
|
|
guint length;
|
|
GstAtomicInt refcount; /* add 1 if in use by element, add 1 if in use by GstBuffer */
|
|
GstV4l2BufferPool * pool;
|
|
};
|
|
|
|
struct _GstV4l2Src {
|
|
GstV4l2Element v4l2element;
|
|
|
|
/* pads */
|
|
GstPad *srcpad;
|
|
|
|
/* internal lists */
|
|
GSList *formats; /* list of available capture formats */
|
|
|
|
/* buffers */
|
|
GstV4l2BufferPool *pool;
|
|
|
|
struct v4l2_requestbuffers breq;
|
|
struct v4l2_format format;
|
|
|
|
/* True if we want to stop */
|
|
gboolean quit;
|
|
|
|
/* A/V sync... frame counter and internal cache */
|
|
gulong handled;
|
|
gint need_writes;
|
|
GstBuffer *cached_buffer;
|
|
gulong last_seq;
|
|
|
|
/* clock */
|
|
GstClock *clock;
|
|
|
|
/* time to substract from clock time to get back to timestamp */
|
|
GstClockTime substract_time;
|
|
|
|
/* how are we going to push buffers? */
|
|
gboolean use_fixed_fps;
|
|
};
|
|
|
|
struct _GstV4l2SrcClass {
|
|
GstV4l2ElementClass parent_class;
|
|
|
|
void (*frame_capture) (GObject *object);
|
|
void (*frame_drop) (GObject *object);
|
|
void (*frame_insert) (GObject *object);
|
|
void (*frame_lost) (GObject *object,
|
|
gint num_lost);
|
|
};
|
|
|
|
|
|
GType gst_v4l2src_get_type(void);
|
|
|
|
#endif /* __GST_V4L2SRC_H__ */
|