gstreamer/sys/v4l/gstv4lsrc.h
Thomas Vander Stichele a45f29c44a fix videorate decision, add latency offset to v4l
Original commit message from CVS:
fix videorate decision, add latency offset to v4l
2004-06-26 15:58:35 +00:00

123 lines
3.3 KiB
C

/* GStreamer
*
* gstv4lsrc.h: BT8x8/V4L video source element
*
* Copyright (C) 2001-2002 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_V4LSRC_H__
#define __GST_V4LSRC_H__
#include <gstv4lelement.h>
G_BEGIN_DECLS
#define GST_TYPE_V4LSRC \
(gst_v4lsrc_get_type())
#define GST_V4LSRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4LSRC,GstV4lSrc))
#define GST_V4LSRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4LSRC,GstV4lSrcClass))
#define GST_IS_V4LSRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4LSRC))
#define GST_IS_V4LSRC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4LSRC))
typedef struct _GstV4lSrc GstV4lSrc;
typedef struct _GstV4lSrcClass GstV4lSrcClass;
enum
{
QUEUE_STATE_ERROR = -1,
QUEUE_STATE_READY_FOR_QUEUE, /* the frame is ready to be queued for capture */
QUEUE_STATE_QUEUED, /* the frame is queued for capture */
QUEUE_STATE_SYNCED /* the frame is captured */
};
typedef enum
{
GST_V4LSRC_SYNC_MODE_CLOCK,
GST_V4LSRC_SYNC_MODE_PRIVATE_CLOCK,
GST_V4LSRC_SYNC_MODE_FIXED_FPS,
GST_V4LSRC_SYNC_MODE_NONE,
} GstV4lSrcSyncMode;
struct _GstV4lSrc
{
GstV4lElement v4lelement;
/* pads */
GstPad *srcpad;
/* capture/buffer info */
struct video_mmap mmap;
struct video_mbuf mbuf;
guint buffer_size;
GstClockTime timestamp_sync;
/* 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 sync_frame, queue_frame;
gboolean is_capturing;
GstClockTimeDiff latency_offset;
/* True if we want to stop */
gboolean quit;
/* A/V sync... frame counter and internal cache */
gulong handled;
gint last_frame;
gint need_writes;
gboolean need_discont;
GstClockTime last_discont; /* gst_element_get_time () of last discont send */
/* 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;
/* list of supported colourspaces (as integers) */
GList *colourspaces;
/* how are we going to timestamp buffers? */
GstV4lSrcSyncMode syncmode;
gboolean copy_mode;
gboolean autoprobe; /* probe on startup ? */
};
struct _GstV4lSrcClass
{
GstV4lElementClass parent_class;
void (*frame_capture) (GObject * object);
void (*frame_drop) (GObject * object);
void (*frame_insert) (GObject * object);
};
GType gst_v4lsrc_get_type (void);
G_END_DECLS
#endif /* __GST_V4LSRC_H__ */