/***************************************************************************** * * Project: Creates a jpeg header * Purpose: Abbreviated JPEG support * Author: Ivan Lucena, [lucena_ivan at hotmail.com] * ****************************************************************************** * Copyright (c) 2007, Ivan Lucena * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files ( the "Software" ), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * *****************************************************************************/ #include "JpegHelper.h" CPL_CVSID("$Id: JpegHelper.cpp 01037e400d90e8bc4a74f8d886ea5a27ecce02c5 2018-01-12 23:49:31Z Kurt Schwehr $") constexpr GByte JPGHLP_1DC_Codes[] = { 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, }; constexpr GByte JPGHLP_1AC_Codes[] = { 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125, }; constexpr GByte JPGHLP_1DC_Symbols[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, }; constexpr GByte JPGHLP_1AC_Symbols[] = { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xCA, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, }; constexpr GByte JPGHLP_2AC_Codes[] = { 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119, }; constexpr GByte JPGHLP_2DC_Codes[] = { 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, }; constexpr GByte JPGHLP_2DC_Symbols[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, }; constexpr GByte JPGHLP_2AC_Symbols[] = { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xCA, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, }; constexpr GByte JPGHLP_DQT_luminace[64] = { 10, 7, 6, 10, 14, 24, 31, 37, 7, 7, 8, 11, 16, 35, 36, 33, 8, 8, 10, 14, 24, 34, 41, 34, 8, 10, 13, 17, 31, 52, 48, 37, 11, 13, 22, 34, 41, 65, 62, 46, 14, 21, 33, 38, 49, 62, 68, 55, 29, 38, 47, 52, 62, 73, 72, 61, 43, 55, 57, 59, 67, 60, 62, 59 }; constexpr GByte JPGHLP_DQT_chrominance[64] = { 10, 11, 14, 28, 59, 59, 59, 59, 11, 13, 16, 40, 59, 59, 59, 59, 14, 16, 34, 59, 59, 59, 59, 59, 28, 40, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59, 59 }; constexpr GByte ZIGZAG[64] = { 0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, 3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53, 10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60, 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 }; #define ZIGZAGCPY(ou, in) \ { int i; for( i = 0; i < 64; i++ ) ou[ZIGZAG[i]] = in[i]; } #define ADJUST(tb, op, vl) \ { int i; for( i = 0; i < 64; i++ ) tb[i] = (GByte) (tb[i] op vl); } int JPGHLP_HeaderMaker( GByte *pabyBuffer, const int nCols, const int nRows, const int nComponents, CPL_UNUSED const int nRestart, const int nQuality ) { GByte *pabNext = pabyBuffer; // ------------------------------------------------------------------------ // Start of Image // ------------------------------------------------------------------------ *( pabNext++ ) = 0xFF; // Tag Mark *( pabNext++ ) = 0xD8; // SOI // ------------------------------------------------------------------------ // Application Segment // ------------------------------------------------------------------------ *( pabNext++ ) = 0xFF; // Tag Mark *( pabNext++ ) = 0xE0; // APP0 *( pabNext++ ) = 0x00; // Segment Length (msb) *( pabNext++ ) = 0x10; // Segment Length (lsb) *( pabNext++ ) = 0x4a; // 'J' *( pabNext++ ) = 0x46; // 'F' *( pabNext++ ) = 0x49; // 'I' *( pabNext++ ) = 0x46; // 'F' *( pabNext++ ) = 0x00; // '\0' *( pabNext++ ) = 0x01; // Version 1 *( pabNext++ ) = 0x01; // Sub Version 1 *( pabNext++ ) = 0x00; // Pixels per inch, 4 Bits for X, 4 Bits for Y *( pabNext++ ) = 0x00; // Horizontal Pixel Density (msb) *( pabNext++ ) = 0x01; // Horizontal Pixel Density (lsb) *( pabNext++ ) = 0x00; // Vertical Pixel Density (msb) *( pabNext++ ) = 0x01; // Vertical Pixel Density (lsb) *( pabNext++ ) = 0x00; // Thumbnail Width *( pabNext++ ) = 0x00; // Thumbnail Height // ------------------------------------------------------------------------ // Quantization Table Segment // ------------------------------------------------------------------------ GByte abQuantTables[2][64]; ZIGZAGCPY( abQuantTables[0], JPGHLP_DQT_luminace ); ZIGZAGCPY( abQuantTables[1], JPGHLP_DQT_chrominance ); if( nQuality == 30 ) { ADJUST( abQuantTables[0], *, 0.5 ); ADJUST( abQuantTables[1], *, 0.5 ); } for( int i = 0; i < 2 && i < nComponents; i++ ) { *( pabNext++ ) = 0xFF; // Tag Mark *( pabNext++ ) = 0xDB; // DQT *( pabNext++ ) = 0; // Segment Length (msb) *( pabNext++ ) = 67; // Length (msb) *( pabNext++ ) = (GByte) i; // Table ID memcpy( pabNext, abQuantTables[i], 64 ); pabNext += 64; } // ------------------------------------------------------------------------ // Start Of Frame Segment // ------------------------------------------------------------------------ *( pabNext++ ) = 0xFF; *( pabNext++ ) = 0xC0; // SOF *( pabNext++ ) = 0; // Segment Length (msb) if ( nComponents > 1 ) *( pabNext++ ) = 17; // Segment Length (lsb) else *( pabNext++ ) = 11; // Segment Length (lsb) *( pabNext++ ) = 8; // 8-bit Precision *( pabNext++ ) = (GByte) (nRows >> 8); // Height in rows (msb) *( pabNext++ ) = (GByte) nRows;// Height in rows (lsb) *( pabNext++ ) = (GByte) (nCols >> 8); // Width in columns (msb) *( pabNext++ ) = (GByte) nCols;// Width in columns (lsb) *( pabNext++ ) = (GByte) nComponents;// Number of components *( pabNext++ ) = 0; // Component ID *( pabNext++ ) = 0x21; // Hozontal/Vertical Sampling *( pabNext++ ) = 0; // Quantization table ID if ( nComponents > 1 ) { *( pabNext++ ) = 1; // Component ID *( pabNext++ ) = 0x11; // Hozontal/Vertical Sampling *( pabNext++ ) = 1; // Quantization table ID *( pabNext++ ) = 2; // Component ID *( pabNext++ ) = 0x11; // Hozontal/Vertical Sampling *( pabNext++ ) = 1; // Quantization table ID } // ------------------------------------------------------------------------ // Huffman Table Segments // ------------------------------------------------------------------------ const GByte *pabHuffTab[2][4]; pabHuffTab[0][0] = JPGHLP_1DC_Codes; pabHuffTab[0][1] = JPGHLP_1AC_Codes; pabHuffTab[0][2] = JPGHLP_1DC_Symbols; pabHuffTab[0][3] = JPGHLP_1AC_Symbols; pabHuffTab[1][0] = JPGHLP_2DC_Codes; pabHuffTab[1][1] = JPGHLP_2AC_Codes; pabHuffTab[1][2] = JPGHLP_2DC_Symbols; pabHuffTab[1][3] = JPGHLP_2AC_Symbols; int pnHTs[2][4]; pnHTs[0][0] = sizeof(JPGHLP_1DC_Codes); pnHTs[0][1] = sizeof(JPGHLP_1AC_Codes); pnHTs[0][2] = sizeof(JPGHLP_1DC_Symbols); pnHTs[0][3] = sizeof(JPGHLP_1AC_Symbols); pnHTs[1][0] = sizeof(JPGHLP_2DC_Codes); pnHTs[1][1] = sizeof(JPGHLP_2AC_Codes); pnHTs[1][2] = sizeof(JPGHLP_2DC_Symbols); pnHTs[1][3] = sizeof(JPGHLP_2AC_Symbols); for( int i = 0; i < 2 && i < nComponents; i++ ) { for( int j = 0; j < 2; j++ ) { const int k = j + 2; const int nCodes = pnHTs[i][j]; const int nSymbols = pnHTs[i][k]; *( pabNext++ ) = 0xFF; // Tag Mark *( pabNext++ ) = 0xc4; // DHT *( pabNext++ ) = 0; // Segment Length (msb) *( pabNext++ ) = (GByte) (3 + nCodes + nSymbols); // Segment Length (lsb) *( pabNext++ ) = (GByte) ((j << 4) | i); // Table ID memcpy( pabNext, pabHuffTab[i][j], nCodes ); pabNext += nCodes; memcpy( pabNext, pabHuffTab[i][k], nSymbols ); pabNext += nSymbols; } } // ------------------------------------------------------------------------ // Start Of Scan Segment // ------------------------------------------------------------------------ *( pabNext++ ) = 0xFF; // Tag Mark *( pabNext++ ) = 0xDA; // SOS if (nComponents > 1 ) { *( pabNext++ ) = 0; // Segment Length (msb) *( pabNext++ ) = 12; // Segment Length (lsb) *( pabNext++ ) = 3; // Number of components *( pabNext++ ) = 0; // Components 0 *( pabNext++ ) = 0; // Huffman table ID *( pabNext++ ) = 1; // Components 1 *( pabNext++ ) = 0x11; // Huffman table ID *( pabNext++ ) = 2; // Components 2 *( pabNext++ ) = 0x11; // Huffman table ID } else { *( pabNext++ ) = 0; // Segment Length (msb) *( pabNext++ ) = 8; // Segment Length (lsb) *( pabNext++ ) = 1; // Number of components *( pabNext++ ) = 0; // Components 0 *( pabNext++ ) = 0; // Huffman table ID } *( pabNext++ ) = 0; // First DCT coefficient *( pabNext++ ) = 63; // Last DCT coefficient *( pabNext++ ) = 0; // Spectral selection return static_cast(pabNext - pabyBuffer); }