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2c39e57114
Original commit message from CVS: * ext/jpeg/gstjpegdec.c: (gst_jpeg_dec_init), (gst_jpeg_dec_chain), (gst_jpeg_dec_change_state): * ext/jpeg/gstjpegdec.h: Fix crashes/invalid memory access for pictures that have a height that is not a multiple of 16 (or rather: v_samp_factor * DCTSIZE). Also fix the state change function for downwards state changes (need to chain up to parent before destroying our resources, to make sure pads get deactivated and our chain function isn't running and using those very same resources in another thread). The jpeg line buffer only needs to be v_samp_factor*DCTSIZE lines per plane, not picture_height lines; allocate that on the stack.
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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/gstelement.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 <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,GstJpegDec))
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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(obj) \
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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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GstElement element;
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/* pads */
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GstPad *sinkpad;
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GstPad *srcpad;
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GstBuffer *tempbuf;
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/* TRUE if each input buffer contains a whole jpeg image */
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gboolean packetized;
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/* the timestamp of the next frame */
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guint64 next_ts;
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/* video state */
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gdouble fps;
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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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};
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struct _GstJpegDecClass {
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GstElementClass parent_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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