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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2012 Collabora Ltd.
* Author : Edward Hervey <edward@collabora.com>
*
* 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_JPEG_DEC_H__
#define __GST_JPEG_DEC_H__
#include <setjmp.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <gst/base/gstadapter.h>
/* this is a hack hack hack to get around jpeglib header bugs... */
#ifdef HAVE_STDLIB_H
# undef HAVE_STDLIB_H
#endif
#include <stdio.h>
#include <jpeglib.h>
G_BEGIN_DECLS
#define GST_TYPE_JPEG_DEC \
(gst_jpeg_dec_get_type())
#define GST_JPEG_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JPEG_DEC,GstJpegDec))
#define GST_JPEG_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_JPEG_DEC,GstJpegDecClass))
#define GST_IS_JPEG_DEC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JPEG_DEC))
#define GST_IS_JPEG_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JPEG_DEC))
typedef struct _GstJpegDec GstJpegDec;
typedef struct _GstJpegDecClass GstJpegDecClass;
struct GstJpegDecErrorMgr {
struct jpeg_error_mgr pub; /* public fields */
jmp_buf setjmp_buffer;
};
struct GstJpegDecSourceMgr {
struct jpeg_source_mgr pub; /* public fields */
GstJpegDec *dec;
};
/* Can't use GstBaseTransform, because GstBaseTransform
* doesn't handle the N buffers in, 1 buffer out case,
* but only the 1-in 1-out case */
struct _GstJpegDec {
GstVideoDecoder decoder;
guint8 *cur_buf;
/* negotiated state */
GstVideoCodecState *input_state;
GstVideoCodecFrame *current_frame;
gint offset[3];
gint stride;
gint inc;
/* parse state */
gboolean saw_header;
gint parse_entropy_len;
gint parse_resync;
/* properties */
gint idct_method;
gint max_errors; /* ATOMIC */
/* current error (the message is the debug message) */
gchar *error_msg;
int error_line;
const gchar *error_func;
/* number of errors since start or last successfully decoded image */
guint error_count;
struct jpeg_decompress_struct cinfo;
struct GstJpegDecErrorMgr jerr;
struct GstJpegDecSourceMgr jsrc;
/* arrays for indirect decoding */
gboolean idr_width_allocated;
guchar *idr_y[16],*idr_u[16],*idr_v[16];
/* current (parsed) image size */
guint rem_img_len;
};
struct _GstJpegDecClass {
GstVideoDecoderClass decoder_class;
};
GType gst_jpeg_dec_get_type(void);
G_END_DECLS
#endif /* __GST_JPEG_DEC_H__ */
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