mirror of https://github.com/FreeRDP/FreeRDP
155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Client
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* Compressed jpeg
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*
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* Copyright 2012 Jay Sorg <jay.sorg@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "config.h"
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#include <freerdp/utils/stream.h>
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#include <freerdp/utils/memory.h>
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#include <freerdp/codec/color.h>
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#ifdef WITH_JPEG
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#define HAVE_BOOLEAN
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#include <jpeglib.h>
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struct mydata_decomp
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{
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char* data;
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int data_bytes;
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};
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/*****************************************************************************/
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static void my_init_source(j_decompress_ptr cinfo)
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{
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}
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/*****************************************************************************/
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static boolean my_fill_input_buffer(j_decompress_ptr cinfo)
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{
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struct mydata_decomp* md;
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md = (struct mydata_decomp*)(cinfo->client_data);
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cinfo->src->next_input_byte = (unsigned char*)(md->data);
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cinfo->src->bytes_in_buffer = md->data_bytes;
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return 1;
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}
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/*****************************************************************************/
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static void my_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
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{
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}
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/*****************************************************************************/
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static boolean my_resync_to_restart(j_decompress_ptr cinfo, int desired)
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{
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return 1;
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}
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/*****************************************************************************/
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static void my_term_source(j_decompress_ptr cinfo)
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{
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}
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/*****************************************************************************/
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static int
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do_decompress(char* comp_data, int comp_data_bytes,
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int* width, int* height, int* bpp,
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char* decomp_data, int* decomp_data_bytes)
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{
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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 src_mgr;
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struct mydata_decomp md;
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JSAMPROW row_pointer[1];
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memset(&cinfo, 0, sizeof(cinfo));
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cinfo.err = jpeg_std_error(&jerr);
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jpeg_create_decompress(&cinfo);
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memset(&src_mgr, 0, sizeof(src_mgr));
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cinfo.src = &src_mgr;
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src_mgr.init_source = my_init_source;
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src_mgr.fill_input_buffer = my_fill_input_buffer;
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src_mgr.skip_input_data = my_skip_input_data;
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src_mgr.resync_to_restart = my_resync_to_restart;
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src_mgr.term_source = my_term_source;
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memset(&md, 0, sizeof(md));
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md.data = comp_data;
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md.data_bytes = comp_data_bytes;
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cinfo.client_data = &md;
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jpeg_read_header(&cinfo, 1);
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cinfo.out_color_space = JCS_RGB;
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*width = cinfo.image_width;
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*height = cinfo.image_height;
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*bpp = cinfo.num_components * 8;
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jpeg_start_decompress(&cinfo);
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while(cinfo.output_scanline < cinfo.image_height)
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{
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row_pointer[0] = (JSAMPROW) decomp_data;
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jpeg_read_scanlines(&cinfo, row_pointer, 1);
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decomp_data += cinfo.image_width * cinfo.num_components;
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}
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*decomp_data_bytes = cinfo.output_width *
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cinfo.output_height * cinfo.num_components;
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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return 0;
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}
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/* jpeg decompress */
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boolean
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jpeg_decompress(uint8 * input, uint8 * output, int width, int height, int size, int bpp)
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{
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int lwidth;
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int lheight;
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int lbpp;
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int ldecomp_data_bytes;
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if (bpp != 24)
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{
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return 0;
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}
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if (do_decompress((char*)input, size,
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&lwidth, &lheight, &lbpp,
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(char*)output, &ldecomp_data_bytes) != 0)
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{
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return 0;
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}
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if (lwidth != width || lheight != height || lbpp != bpp)
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{
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return 0;
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}
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return 1;
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}
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#else
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boolean
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jpeg_decompress(uint8 * input, uint8 * output, int width, int height, int size, int bpp)
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{
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return 0;
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}
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#endif
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