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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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26e7fe27d7
When we can't decode directly into the output buffer, make our temp buffers only as big as needed instead of allocating for the worst case scenario (well, we still alloc more than strictly needed for some cases, but significantly less than before).
125 lines
3.2 KiB
C
125 lines
3.2 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/gst.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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#define CINFO_GET_JPEGDEC(cinfo_ptr) \
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(((struct GstJpegDecSourceMgr*)((cinfo_ptr)->src))->dec)
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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 (expected) timestamp of the next frame */
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guint64 next_ts;
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GstSegment segment;
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/* TRUE if the next output buffer should have the DISCONT flag set */
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gboolean discont;
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/* QoS stuff *//* with LOCK */
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gdouble proportion;
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GstClockTime earliest_time;
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GstClockTime qos_duration;
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/* video state */
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gint framerate_numerator;
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gint framerate_denominator;
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/* negotiated state */
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gint caps_framerate_numerator;
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gint caps_framerate_denominator;
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gint caps_width;
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gint caps_height;
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gint outsize;
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/* properties */
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gint idct_method;
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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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};
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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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