1 /* GStreamer

     2  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

     3  *

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

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

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

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

     8  *

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

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

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

    12  * Library General Public License for more details.

    13  *

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

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

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

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 

    21 #ifndef __GST_JPEG_DEC_H__

    22 #define __GST_JPEG_DEC_H__

    23 

    24 

    25 #include <setjmp.h>

    26 #include <gst/gstelement.h>

    27 

    28 /* this is a hack hack hack to get around jpeglib header bugs... */

    29 #ifdef HAVE_STDLIB_H

    30 # undef HAVE_STDLIB_H

    31 #endif

    32 #include <jpeglib.h>

    33 

    34 G_BEGIN_DECLS

    35 

    36 #define GST_TYPE_JPEG_DEC \

    37   (gst_jpeg_dec_get_type())

    38 #define GST_JPEG_DEC(obj) \

    39   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JPEG_DEC,GstJpegDec))

    40 #define GST_JPEG_DEC_CLASS(klass) \

    41   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_JPEG_DEC,GstJpegDecClass))

    42 #define GST_IS_JPEG_DEC(obj) \

    43   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JPEG_DEC))

    44 #define GST_IS_JPEG_DEC_CLASS(klass) \

    45   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JPEG_DEC))

    46 

    47 typedef struct _GstJpegDec           GstJpegDec;

    48 typedef struct _GstJpegDecClass      GstJpegDecClass;

    49 

    50 struct GstJpegDecErrorMgr {

    51   struct jpeg_error_mgr    pub;   /* public fields */

    52   jmp_buf                  setjmp_buffer;

    53 };

    54 

    55 struct GstJpegDecSourceMgr {

    56   struct jpeg_source_mgr   pub;   /* public fields */

    57   GstJpegDec              *dec;

    58 };

    59 

    60 /* Can't use GstBaseTransform, because GstBaseTransform

    61  * doesn't handle the N buffers in, 1 buffer out case,

    62  * but only the 1-in 1-out case */

    63 struct _GstJpegDec {

    64   GstElement element;

    65 

    66   /* pads */

    67   GstPad  *sinkpad;

    68   GstPad  *srcpad;

    69 

    70   GstBuffer *tempbuf;

    71 

    72   /* TRUE if each input buffer contains a whole jpeg image */

    73   gboolean packetized;

    74 

    75   /* the (expected) timestamp of the next frame */

    76   guint64  next_ts;

    77 

    78   /* video state */

    79   gint framerate_numerator;

    80   gint framerate_denominator;

    81 

    82   /* negotiated state */

    83   gint     caps_framerate_numerator;

    84   gint     caps_framerate_denominator;

    85   gint     caps_width;

    86   gint     caps_height;

    87 

    88   struct jpeg_decompress_struct cinfo;

    89   struct GstJpegDecErrorMgr     jerr;

    90   struct GstJpegDecSourceMgr    jsrc;

    91 };

    92 

    93 struct _GstJpegDecClass {

    94   GstElementClass  parent_class;

    95 };

    96 

    97 GType gst_jpeg_dec_get_type(void);

    98 

    99 

   100 G_END_DECLS

   101 

   102 

   103 #endif /* __GST_JPEG_DEC_H__ */