1 /* GStreamer

     2  *

     3  * gstv4lmjpegsink.h: hardware MJPEG video sink element

     4  *

     5  * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>

     6  *

     7  * This library is free software; you can redistribute it and/or

     8  * modify it under the terms of the GNU Library General Public

     9  * License as published by the Free Software Foundation; either

    10  * version 2 of the License, or (at your option) any later version.

    11  *

    12  * This library is distributed in the hope that it will be useful,

    13  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    15  * Library General Public License for more details.

    16  *

    17  * You should have received a copy of the GNU Library General Public

    18  * License along with this library; if not, write to the

    19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    20  * Boston, MA 02111-1307, USA.

    21  */

    22 

    23 #ifndef __GST_V4LMJPEGSINK_H__

    24 #define __GST_V4LMJPEGSINK_H__

    25 

    26 #include <gstv4lelement.h>

    27 #include <sys/time.h>

    28 #include <videodev_mjpeg.h>

    29 

    30 

    31 G_BEGIN_DECLS

    32 

    33 

    34 #define GST_TYPE_V4LMJPEGSINK \

    35   (gst_v4lmjpegsink_get_type())

    36 #define GST_V4LMJPEGSINK(obj) \

    37   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4LMJPEGSINK,GstV4lMjpegSink))

    38 #define GST_V4LMJPEGSINK_CLASS(klass) \

    39   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4LMJPEGSINK,GstV4lMjpegSinkClass))

    40 #define GST_IS_V4LMJPEGSINK(obj) \

    41   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4LMJPEGSINK))

    42 #define GST_IS_V4LMJPEGSINK_CLASS(klass) \

    43   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4LMJPEGSINK))

    44 

    45 typedef struct _GstV4lMjpegSink GstV4lMjpegSink;

    46 typedef struct _GstV4lMjpegSinkClass GstV4lMjpegSinkClass;

    47 

    48 struct _GstV4lMjpegSink {

    49   GstV4lElement v4lelement;

    50 

    51   /* the sink pas */

    52   GstPad *sinkpad;

    53 

    54   /* frame properties for common players */

    55   gint frames_displayed;

    56   guint64 frame_time;

    57 

    58   /* system clock object */

    59   GstClock *clock;

    60 

    61   /* buffer/capture info */

    62   struct mjpeg_sync bsync;

    63   struct mjpeg_requestbuffers breq;

    64 

    65   /* thread to keep track of synced frames */

    66   gint8 *isqueued_queued_frames; /* 1 = queued, 0 = unqueued, -1 = error */

    67   GThread *thread_queued_frames;

    68   GMutex *mutex_queued_frames;

    69   GCond **cond_queued_frames;

    70   gint current_frame;

    71 

    72   /* width/height/norm of the jpeg stream */

    73   gint width;

    74   gint height;

    75   gint norm;

    76 

    77   /* cache values */

    78   gint x_offset;

    79   gint y_offset;

    80 

    81   gint numbufs;

    82   gint bufsize; /* in KB */

    83 };

    84 

    85 struct _GstV4lMjpegSinkClass {

    86   GstV4lElementClass parent_class;

    87 

    88   /* signals */

    89   void (*frame_displayed) (GstElement *element);

    90 };

    91 

    92 GType gst_v4lmjpegsink_get_type(void);

    93 

    94 

    95 G_END_DECLS

    96 

    97 #endif /* __GST_SDLVIDEOSINK_H__ */