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Diffstat (limited to 'client/jpeg_decoder.h')
| -rw-r--r-- | client/jpeg_decoder.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/client/jpeg_decoder.h b/client/jpeg_decoder.h new file mode 100644 index 00000000..5c38cfa7 --- /dev/null +++ b/client/jpeg_decoder.h @@ -0,0 +1,91 @@ +/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */ +/* + Copyright (C) 2010 Red Hat, Inc. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _H_JPEG_DECODER +#define _H_JPEG_DECODER + +#include "common.h" +#include "canvas_base.h" + +#ifdef WIN32 +/* We need some hacks to avoid warnings from the jpeg headers */ +#define XMD_H +#undef FAR +#endif + +extern "C" { +#include <jpeglib.h> +} + +class RGBConverter { +public: + virtual ~RGBConverter() {} + virtual void convert(uint8_t* src, uint8_t* dest, int width) = 0; +}; + +class RGBToBGRConverter : public RGBConverter { +public: + void convert(uint8_t* src, uint8_t* dest, int width) + { + for (int x = 0; x < width; x++) { + *dest++ = src[2]; + *dest++ = src[1]; + *dest++ = src[0]; + src += 3; + } + } +}; + +class RGBToBGRXConverter : public RGBConverter { +public: + void convert(uint8_t* src, uint8_t* dest, int width) + { + for (int x = 0; x < width; x++) { + *dest++ = src[2]; + *dest++ = src[1]; + *dest++ = src[0]; + *dest++ = 0; + src += 3; + } + } +}; + +class JpegDecoder : public SpiceJpegDecoder { +public: + JpegDecoder(); + ~JpegDecoder(); + + void begin_decode(uint8_t* data, int data_size, int& out_width, int& out_height); + /* format is SPICE_BITMAP_FMT_<X> for the dest; currently, only + x=32BIT and x=24BIT are supported */ + void decode(uint8_t* dest, int stride, int format); + +private: + struct jpeg_decompress_struct _cinfo; + struct jpeg_error_mgr _jerr; + struct jpeg_source_mgr _jsrc; + + uint8_t* _data; + int _data_size; + int _width; + int _height; + + RGBToBGRConverter _rgb2bgr; + RGBToBGRXConverter _rgb2bgrx; +}; +#endif
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