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;;================================================================================================;; |
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;;//// jpeg.inc //// (c) diamond, 2008-2009 //////////////////////////////////////////////////////;; |
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;;================================================================================================;; |
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;; ;; |
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;; This file is part of Common development libraries (Libs-Dev). ;; |
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;; ;; |
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;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;; |
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;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;; |
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;; of the License, or (at your option) any later version. ;; |
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;; ;; |
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;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;; |
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;; even the implied warranty of 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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;; ;; |
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;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;; |
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;; If not, see . ;; |
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;; ;; |
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;;================================================================================================;; |
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struct jpeg.work ; working area for JPEG handling |
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image dd ? |
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; progressive JPEG? |
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progressive db ? |
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; one component in the scan? |
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not_interleaved db ? |
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; Adobe YCCK file? |
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adobe_ycck db ? |
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rb 1 |
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; parameters for progressive scan |
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ScanStart db ? |
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ScanEnd db ? |
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ApproxPosLow db ? |
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ApproxPosHigh db ? |
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; restart interval |
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restart_interval dd ? |
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decoded_MCUs dd ? |
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_esp dd ? |
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; components information, up to 4 components |
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; db ComponentIdentifier, db V, db H, db VFactor, db HFactor, db QuantizationTable |
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components rb 4*6 |
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max_v db ? |
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max_h db ? |
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cur_rst_marker db ? |
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db ? |
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huffman_bits dd ? |
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block_width dd ? |
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block_height dd ? |
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block_delta_x dd ? |
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block_delta_y dd ? |
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cur_block_dx dd ? |
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cur_block_dy dd ? |
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x_num_blocks dd ? |
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y_num_blocks dd ? |
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delta_x dd ? |
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delta_y dd ? |
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pixel_size dd ? |
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line_size dd ? |
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cur_x dd ? |
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cur_y dd ? |
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max_x dd ? |
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max_y dd ? |
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cur_out_ptr dd ? |
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dct_buffer dd ? |
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dct_buffer_size dd ? |
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;ns dd ? |
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; +0: db V, db H, db VFactor, db HFactor, dd HIncrement, dd VIncrement, |
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; +12: dd QuantizationTable, dd DCTable, dd ACTable, |
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; +24: dd width/HFactor, dd width/HFactor-8k, dd HFactor+1-(width%HFactor), |
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; +36: dd height/VFactor, dd height/VFactor-8m, dd VFactor+1-(height%VFactor), |
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; +48: dw DCPrediction, db ?, db (0 for Y, 80h for Cb,Cr), dd ComponentOffset |
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cur_components rb 4*56 |
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cur_components_end dd ? |
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; Fourier coefficients |
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dct_coeff rw 64 |
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; Temporary space for IDCT |
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idct_tmp_area rd 64 |
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; decoded block 8*8 |
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decoded_data rb 8*8 |
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; up to 4 quantization tables |
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quant_tables rd 4*64 |
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quant_tables_defined rb 4 |
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; Huffman tables |
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dc_huffman_defined rb 4 |
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ac_huffman_defined rb 4 |
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; up to 4 DC Huffman tables |
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;dc_huffman rd 4*256*2 |
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; up to 4 AC Huffman tables |
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;ac_huffman rd 4*256*2 |
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max_hufftable_size = (256 + (9+128)*16)*2 |
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dc_huffman rb 4*max_hufftable_size |
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ac_huffman rb 4*max_hufftable_size |
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ends |