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6588850d74
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.
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/* G-Streamer Video4linux2 video-capture plugin
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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_V4L2SRC_H__
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#define __GST_V4L2SRC_H__
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#include <gstv4l2element.h>
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#define GST_TYPE_V4L2SRC \
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(gst_v4l2src_get_type())
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#define GST_V4L2SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2SRC,GstV4l2Src))
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#define GST_V4L2SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2SRC,GstV4l2SrcClass))
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#define GST_IS_V4L2SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2SRC))
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#define GST_IS_V4L2SRC_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2SRC))
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typedef struct _GstV4l2Src GstV4l2Src;
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typedef struct _GstV4l2SrcClass GstV4l2SrcClass;
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struct _GstV4l2Src {
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GstV4l2Element v4l2element;
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/* pads */
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GstPad *srcpad;
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/* internal lists */
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GList /*v4l2_fmtdesc*/ *formats, *format_list; /* list of available capture formats */
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/* buffer properties */
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struct v4l2_buffer bufsettings;
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struct v4l2_requestbuffers breq;
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struct v4l2_format format;
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/* num of queued frames and some GThread stuff
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* to wait if there's not enough */
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gint8 *frame_queue_state;
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GMutex *mutex_queue_state;
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GCond *cond_queue_state;
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gint num_queued;
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gint queue_frame;
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/* True if we want to stop */
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gboolean quit;
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/* A/V sync... frame counter and internal cache */
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gulong handled;
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gint last_frame;
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gint need_writes;
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gulong last_seq;
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/* clock */
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GstClock *clock;
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/* time to substract from clock time to get back to timestamp */
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GstClockTime substract_time;
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/* how often are we going to use each frame? */
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gint *use_num_times;
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/* how are we going to push buffers? */
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gboolean use_fixed_fps;
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/* bufferpool for the buffers we're gonna use */
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GstBufferPool *bufferpool;
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};
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struct _GstV4l2SrcClass {
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GstV4l2ElementClass parent_class;
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void (*frame_capture) (GObject *object);
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void (*frame_drop) (GObject *object);
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void (*frame_insert) (GObject *object);
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void (*frame_lost) (GObject *object,
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gint num_lost);
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};
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GType gst_v4l2src_get_type(void);
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#endif /* __GST_V4L2SRC_H__ */
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