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110 lines
3 KiB
C
110 lines
3 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2012 Collabora Ltd.
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* Author : Edward Hervey <edward@collabora.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_JPEG_DEC_H__
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#define __GST_JPEG_DEC_H__
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#include <setjmp.h>
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideodecoder.h>
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#include <gst/base/gstadapter.h>
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/* this is a hack hack hack to get around jpeglib header bugs... */
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#ifdef HAVE_STDLIB_H
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# undef HAVE_STDLIB_H
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#endif
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#include <stdio.h>
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#include <jpeglib.h>
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G_BEGIN_DECLS
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#define GST_TYPE_JPEG_DEC \
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(gst_jpeg_dec_get_type())
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#define GST_JPEG_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_JPEG_DEC,GstJpegDec))
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#define GST_JPEG_DEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_JPEG_DEC,GstJpegDecClass))
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#define GST_IS_JPEG_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_JPEG_DEC))
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#define GST_IS_JPEG_DEC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_JPEG_DEC))
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typedef struct _GstJpegDec GstJpegDec;
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typedef struct _GstJpegDecClass GstJpegDecClass;
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struct GstJpegDecErrorMgr {
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struct jpeg_error_mgr pub; /* public fields */
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jmp_buf setjmp_buffer;
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};
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struct GstJpegDecSourceMgr {
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struct jpeg_source_mgr pub; /* public fields */
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GstJpegDec *dec;
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};
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/* Can't use GstBaseTransform, because GstBaseTransform
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* doesn't handle the N buffers in, 1 buffer out case,
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* but only the 1-in 1-out case */
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struct _GstJpegDec {
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GstVideoDecoder decoder;
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/* negotiated state */
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GstVideoCodecState *input_state;
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GstVideoCodecFrame *current_frame;
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GstMapInfo current_frame_map;
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/* parse state */
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gboolean saw_header;
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gint parse_entropy_len;
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gint parse_resync;
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/* properties */
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gint idct_method;
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gint max_errors; /* ATOMIC */
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struct jpeg_decompress_struct cinfo;
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struct GstJpegDecErrorMgr jerr;
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struct GstJpegDecSourceMgr jsrc;
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/* arrays for indirect decoding */
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gboolean idr_width_allocated;
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guchar *idr_y[16],*idr_u[16],*idr_v[16];
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/* scratch buffer for direct decoding overflow */
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guchar *scratch;
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guint scratch_size;
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/* current (parsed) image size */
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guint rem_img_len;
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};
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struct _GstJpegDecClass {
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GstVideoDecoderClass decoder_class;
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};
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GType gst_jpeg_dec_get_type(void);
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G_END_DECLS
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#endif /* __GST_JPEG_DEC_H__ */
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