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https://gitlab.uni-freiburg.de/opensourcevdi/spice
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75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/*
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Copyright (C) 2010 Red Hat, Inc.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _H_MJPEG_DECODER
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#define _H_MJPEG_DECODER
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#include "common.h"
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#ifdef WIN32
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/* We need some hacks to avoid warnings from the jpeg headers */
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#define XMD_H
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#undef FAR
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#endif
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extern "C" {
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#include <jpeglib.h>
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}
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extern "C" {
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void mjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes);
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}
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class MJpegDecoder {
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public:
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MJpegDecoder(int width, int height, int stride,
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uint8_t *frame, bool back_compat);
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~MJpegDecoder();
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bool decode_data(uint8_t *data, size_t length);
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private:
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friend void mjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes);
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void convert_scanline(void);
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void append_data(uint8_t *data, size_t length);
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struct jpeg_decompress_struct _cinfo;
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struct jpeg_error_mgr _jerr;
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struct jpeg_source_mgr _jsrc;
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uint8_t *_data;
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size_t _data_size;
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size_t _data_start;
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size_t _data_end;
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size_t _extra_skip;
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unsigned _width;
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unsigned _height;
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int _stride;
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uint8_t *_frame;
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bool _back_compat;
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unsigned _y;
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uint8_t *_scanline;
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int _state;
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};
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#endif
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