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author | Yaniv Kamay <ykamay@redhat.com> | 2009-09-19 21:25:46 +0300 |
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committer | Yaniv Kamay <ykamay@redhat.com> | 2009-10-14 15:06:41 +0200 |
commit | c1b79eb035fa158fb2ac3bc8e559809611070016 (patch) | |
tree | 3348dd749a700dedf87c9b16fe8be77c62928df8 /client/glz_decoder.h | |
download | spice-c1b79eb035fa158fb2ac3bc8e559809611070016.tar.gz spice-c1b79eb035fa158fb2ac3bc8e559809611070016.tar.xz spice-c1b79eb035fa158fb2ac3bc8e559809611070016.zip |
fresh start
Diffstat (limited to 'client/glz_decoder.h')
-rw-r--r-- | client/glz_decoder.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/client/glz_decoder.h b/client/glz_decoder.h new file mode 100644 index 00000000..98c15754 --- /dev/null +++ b/client/glz_decoder.h @@ -0,0 +1,86 @@ +/* + Copyright (C) 2009 Red Hat, Inc. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of + the License, or (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _H_GLZ_DECODER +#define _H_GLZ_DECODER + +#include "lz_common.h" +#include "glz_decoder_config.h" +#include "glz_decoder_window.h" +#include "draw.h" + + + +class GlzDecodeHandler { +public: + GlzDecodeHandler() {} + virtual ~GlzDecodeHandler() {} + + /* Called by the decoder before the image decoding is starts. The + user of the decoder should create GlzDecodedImage instance. + If resources should be released when the image exits the Glz window, + it should be handled in the instance dtor. + + opaque_usr_info: the data sent when GlzDecoder::decode was called + gross_pixels : number of pixels when considering the whole stride*/ + virtual GlzDecodedImage *alloc_image(void *opaque_usr_info, uint64_t image_id, + uint64_t image_win_head_id, LzImageType type, + int width, int height, int gross_pixels, + int n_bytes_per_pixel, bool top_down) = 0; +}; + +/* + This class implements the lz decoding algorithm +*/ + +class GlzDecoder { +public: + + GlzDecoder(GlzDecoderWindow &images_window, GlzDecodeHandler &usr_handler, + GlzDecoderDebug &debug_calls); + virtual ~GlzDecoder(); + + /* Decodes the data and afterwards calls GlzDecodeHandler::handle_decoded_image */ + void decode(uint8_t *data, Palette *palette, void *opaque_usr_info); + +private: + void decode_header(); + uint32_t decode_32(); + uint64_t decode_64(); + +private: + GlzDecoderWindow &_images_window; + GlzDecodeHandler &_usr_handler; + GlzDecoderDebug &_debug_calls; + + uint8_t *_in_now; + uint8_t *_in_start; + + struct { + uint64_t id; + LzImageType type; + int width; + int height; + int gross_pixels; + bool top_down; + int win_head_dist; + uint8_t *data; + } _image; +}; + +#endif // _H_GLZ_DECODER + |