gstreamer/sys/v4l2/gstv4l2src.h
Ronald S. Bultje 6588850d74 Some final fixes for the v4lsrc elements. remove software sync thread (use GST_ELEMENT_THREAD_SUGGESTED instead) make...
Original commit message from CVS:
Some final fixes for the v4lsrc elements.

* remove software sync thread (use GST_ELEMENT_THREAD_SUGGESTED instead)
* make all src elements threadsafe
* fix num_buffer argument setting in v4l2src (VIDIOC_S_PARM)
* re-add bufsize (RO) for v4lmjpegsrc
* fix the A/V sync calculation in all elements (spvf=GST_SECOND/fps, not GST_SECOND*fps)
* probably some more crap....

With all this, it actually works quite well. The TODO files describes the
next steps in order to make a full-featured video recorder based on these
elements and GStreamer (bottom). Making a simple recorder should be fairly
easy now, btw.
2003-05-21 06:33:18 +00:00

101 lines
2.8 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>
#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 _GstV4l2Src GstV4l2Src;
typedef struct _GstV4l2SrcClass GstV4l2SrcClass;
struct _GstV4l2Src {
GstV4l2Element v4l2element;
/* pads */
GstPad *srcpad;
/* internal lists */
GList /*v4l2_fmtdesc*/ *formats, *format_list; /* list of available capture formats */
/* buffer properties */
struct v4l2_buffer bufsettings;
struct v4l2_requestbuffers breq;
struct v4l2_format format;
/* num of queued frames and some GThread stuff
* to wait if there's not enough */
gint8 *frame_queue_state;
GMutex *mutex_queue_state;
GCond *cond_queue_state;
gint num_queued;
gint queue_frame;
/* True if we want to stop */
gboolean quit;
/* A/V sync... frame counter and internal cache */
gulong handled;
gint last_frame;
gint need_writes;
gulong last_seq;
/* clock */
GstClock *clock;
/* time to substract from clock time to get back to timestamp */
GstClockTime substract_time;
/* how often are we going to use each frame? */
gint *use_num_times;
/* how are we going to push buffers? */
gboolean use_fixed_fps;
/* bufferpool for the buffers we're gonna use */
GstBufferPool *bufferpool;
};
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__ */