16acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/*M/////////////////////////////////////////////////////////////////////////////////////// 26acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 36acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 46acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 56acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// By downloading, copying, installing or using the software you agree to this license. 66acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// If you do not agree to this license, do not download, install, 76acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// copy or use the software. 86acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 96acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Intel License Agreement 116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// For Open Source Computer Vision Library 126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Copyright (C) 2000, Intel Corporation, all rights reserved. 146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Third party copyrights are property of their respective owners. 156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Redistribution and use in source and binary forms, with or without modification, 176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// are permitted provided that the following conditions are met: 186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * Redistribution's of source code must retain the above copyright notice, 206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// this list of conditions and the following disclaimer. 216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * Redistribution's in binary form must reproduce the above copyright notice, 236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// this list of conditions and the following disclaimer in the documentation 246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// and/or other materials provided with the distribution. 256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// * The name of Intel Corporation may not be used to endorse or promote products 276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// derived from this software without specific prior written permission. 286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// This software is provided by the copyright holders and contributors "as is" and 306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// any express or implied warranties, including, but not limited to, the implied 316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// warranties of merchantability and fitness for a particular purpose are disclaimed. 326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// In no event shall the Intel Corporation or contributors be liable for any direct, 336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// indirect, incidental, special, exemplary, or consequential damages 346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// (including, but not limited to, procurement of substitute goods or services; 356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// loss of use, data, or profits; or business interruption) however caused 366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// and on any theory of liability, whether in contract, strict liability, 376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// or tort (including negligence or otherwise) arising in any way out of 386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// the use of this software, even if advised of the possibility of such damage. 396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// 406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn//M*/ 416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "_highgui.h" 436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "grfmt_jpeg.h" 446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// JPEG filter factory 466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpeg::GrFmtJpeg() 486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_sign_len = 3; 506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_signature = "\xFF\xD8\xFF"; 516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_description = "JPEG files (*.jpeg;*.jpg;*.jpe)"; 526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpeg::~GrFmtJpeg() 566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtReader* GrFmtJpeg::NewReader( const char* filename ) 616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return new GrFmtJpegReader( filename ); 636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtWriter* GrFmtJpeg::NewWriter( const char* filename ) 676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return new GrFmtJpegWriter( filename ); 696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#ifdef HAVE_JPEG 736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/****************************************************************************************\ 756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn This part of the file implements JPEG codec on base of IJG libjpeg library, 766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn in particular, this is the modified example.doc from libjpeg package. 776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn See otherlibs/_graphics/readme.txt for copyright notice. 786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn\****************************************************************************************/ 796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <stdio.h> 816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include <setjmp.h> 826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#ifdef WIN32 846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define XMD_H // prevent redefinition of INT32 866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#undef FAR // prevent FAR redefinition 876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#endif 896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#if defined WIN32 && defined __GNUC__ 916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renntypedef unsigned char boolean; 926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#endif 936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennextern "C" { 956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#include "jpeglib.h" 966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/////////////////////// Error processing ///////////////////// 996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renntypedef struct GrFmtJpegErrorMgr 1016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct jpeg_error_mgr pub; /* "parent" structure */ 1036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jmp_buf setjmp_buffer; /* jump label */ 1046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegErrorMgr; 1066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennMETHODDEF(void) 1096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennerror_exit( j_common_ptr cinfo ) 1106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtJpegErrorMgr* err_mgr = (GrFmtJpegErrorMgr*)(cinfo->err); 1126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Return control to the setjmp point */ 1146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn longjmp( err_mgr->setjmp_buffer, 1 ); 1156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/////////////////////// GrFmtJpegReader /////////////////// 1196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegReader::GrFmtJpegReader( const char* filename ) : GrFmtReader( filename ) 1226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_cinfo = 0; 1246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_f = 0; 1256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegReader::~GrFmtJpegReader() 1296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid GrFmtJpegReader::Close() 1346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_f ) 1366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn fclose( m_f ); 1386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_f = 0; 1396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_cinfo ) 1426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_decompress_struct* cinfo = (jpeg_decompress_struct*)m_cinfo; 1446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtJpegErrorMgr* jerr = (GrFmtJpegErrorMgr*)m_jerr; 1456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_destroy_decompress( cinfo ); 1476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn delete cinfo; 1486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn delete jerr; 1496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_cinfo = 0; 1506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_jerr = 0; 1516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtReader::Close(); 1536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::ReadHeader() 1576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 1586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bool result = false; 1596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 1606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_decompress_struct* cinfo = new jpeg_decompress_struct; 1626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtJpegErrorMgr* jerr = new GrFmtJpegErrorMgr; 1636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->err = jpeg_std_error(&jerr->pub); 1656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jerr->pub.error_exit = error_exit; 1666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_cinfo = cinfo; 1686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_jerr = jerr; 1696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( jerr->setjmp_buffer ) == 0 ) 1716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_create_decompress( cinfo ); 1736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_f = fopen( m_filename, "rb" ); 1756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_f ) 1766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 1776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_stdio_src( cinfo, m_f ); 1786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_read_header( cinfo, TRUE ); 1796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_width = cinfo->image_width; 1816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_height = cinfo->image_height; 1826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_iscolor = cinfo->num_components > 1; 1836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = true; 1856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 1876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !result ) 1896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 1906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return result; 1926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 1936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/*************************************************************************** 1956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * following code is for supporting MJPEG image files 1966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * based on a message of Laurent Pinchart on the video4linux mailing list 1976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ***************************************************************************/ 1986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* JPEG DHT Segment for YCrCb omitted from MJPEG data */ 2006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic 2016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennunsigned char my_jpeg_odml_dht[0x1a4] = { 2026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xff, 0xc4, 0x01, 0xa2, 2036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 2056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x00, 0x00, 0x00, 0x00, 2066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 2076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 2096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x00, 0x00, 0x00, 0x00, 2106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 2116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 2136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x04, 0x00, 0x00, 0x01, 0x7d, 2146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 2156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x13, 0x51, 0x61, 0x07, 2166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 2176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x15, 0x52, 0xd1, 0xf0, 2186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 2196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x25, 0x26, 0x27, 0x28, 2206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 2216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x46, 0x47, 0x48, 0x49, 2226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 2236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x66, 0x67, 0x68, 0x69, 2246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 2256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x86, 0x87, 0x88, 0x89, 2266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 2276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa4, 0xa5, 0xa6, 0xa7, 2286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 2296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xc2, 0xc3, 0xc4, 0xc5, 2306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 2316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xd9, 0xda, 0xe1, 0xe2, 2326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 2336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf5, 0xf6, 0xf7, 0xf8, 2346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf9, 0xfa, 2356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 2376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x04, 0x00, 0x01, 0x02, 0x77, 2386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 2396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x51, 0x07, 0x61, 0x71, 2406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 2416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x23, 0x33, 0x52, 0xf0, 2426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 2436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x18, 0x19, 0x1a, 0x26, 2446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 2456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x45, 0x46, 0x47, 0x48, 2466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 2476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x65, 0x66, 0x67, 0x68, 2486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 2496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x84, 0x85, 0x86, 0x87, 2506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 2516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa2, 0xa3, 0xa4, 0xa5, 2526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 2536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xb9, 0xba, 0xc2, 0xc3, 2546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 2556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xd7, 0xd8, 0xd9, 0xda, 2566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 2576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf5, 0xf6, 0xf7, 0xf8, 2586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf9, 0xfa 2596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 2606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* 2626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * Parse the DHT table. 2636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * This code comes from jpeg6b (jdmarker.c). 2646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn */ 2656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic 2666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint my_jpeg_load_dht (struct jpeg_decompress_struct *info, unsigned char *dht, 2676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn JHUFF_TBL *ac_tables[], JHUFF_TBL *dc_tables[]) 2686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 2696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int length = (dht[2] << 8) + dht[3] - 2; 2706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int pos = 4; 2716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned int count, i; 2726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int index; 2736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn JHUFF_TBL **hufftbl; 2756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned char bits[17]; 2766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn unsigned char huffval[256]; 2776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while (length > 16) 2796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bits[0] = 0; 2816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn index = dht[pos++]; 2826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn count = 0; 2836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for (i = 1; i <= 16; ++i) 2846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bits[i] = dht[pos++]; 2866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn count += bits[i]; 2876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 2886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= 17; 2896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (count > 256 || count > length) 2916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 2926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for (i = 0; i < count; ++i) 2946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn huffval[i] = dht[pos++]; 2956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= count; 2966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 2976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (index & 0x10) 2986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 2996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn index -= 0x10; 3006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn hufftbl = &ac_tables[index]; 3016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 3036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn hufftbl = &dc_tables[index]; 3046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (index < 0 || index >= NUM_HUFF_TBLS) 3066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 3076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (*hufftbl == NULL) 3096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *hufftbl = jpeg_alloc_huff_table ((j_common_ptr)info); 3106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (*hufftbl == NULL) 3116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 3126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy ((*hufftbl)->bits, bits, sizeof (*hufftbl)->bits); 3146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy ((*hufftbl)->huffval, huffval, sizeof (*hufftbl)->huffval); 3156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if (length != 0) 3186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return -1; 3196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return 0; 3216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 3226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/*************************************************************************** 3246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * end of code for supportting MJPEG image files 3256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn * based on a message of Laurent Pinchart on the video4linux mailing list 3266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ***************************************************************************/ 3276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::ReadData( uchar* data, int step, int color ) 3296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 3306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bool result = false; 3316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn color = color > 0 || (m_iscolor && color < 0); 3336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_cinfo && m_jerr && m_width && m_height ) 3356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_decompress_struct* cinfo = (jpeg_decompress_struct*)m_cinfo; 3376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtJpegErrorMgr* jerr = (GrFmtJpegErrorMgr*)m_jerr; 3386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn JSAMPARRAY buffer = 0; 3396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( jerr->setjmp_buffer ) == 0 ) 3416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* check if this is a mjpeg image format */ 3436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if ( cinfo->ac_huff_tbl_ptrs[0] == NULL && 3446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->ac_huff_tbl_ptrs[1] == NULL && 3456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->dc_huff_tbl_ptrs[0] == NULL && 3466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->dc_huff_tbl_ptrs[1] == NULL ) 3476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* yes, this is a mjpeg image format, so load the correct 3496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn huffman table */ 3506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn my_jpeg_load_dht( cinfo, 3516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn my_jpeg_odml_dht, 3526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->ac_huff_tbl_ptrs, 3536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->dc_huff_tbl_ptrs ); 3546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( color > 0 || (m_iscolor && color < 0) ) 3576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn color = 1; 3596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cinfo->num_components != 4 ) 3606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_space = JCS_RGB; 3626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_components = 3; 3636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 3656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_space = JCS_CMYK; 3676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_components = 4; 3686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 3716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn color = 0; 3736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cinfo->num_components != 4 ) 3746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_space = JCS_GRAYSCALE; 3766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_components = 1; 3776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 3796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_space = JCS_CMYK; 3816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo->out_color_components = 4; 3826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 3846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_start_decompress( cinfo ); 3866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn buffer = (*cinfo->mem->alloc_sarray)((j_common_ptr)cinfo, 3886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn JPOOL_IMAGE, m_width*4, 1 ); 3896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 3906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; m_height--; data += step ) 3916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_read_scanlines( cinfo, buffer, 1 ); 3936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( color ) 3946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 3956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cinfo->out_color_components == 3 ) 3966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCvt_RGB2BGR_8u_C3R( buffer[0], 0, data, 0, cvSize(m_width,1) ); 3976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 3986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCvt_CMYK2BGR_8u_C4C3R( buffer[0], 0, data, 0, cvSize(m_width,1) ); 3996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 4016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cinfo->out_color_components == 1 ) 4036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memcpy( data, buffer[0], m_width ); 4046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 4056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCvt_CMYK2Gray_8u_C4C1R( buffer[0], 0, data, 0, cvSize(m_width,1) ); 4066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = true; 4096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_finish_decompress( cinfo ); 4106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 4146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return result; 4156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/////////////////////// GrFmtJpegWriter /////////////////// 4196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegWriter::GrFmtJpegWriter( const char* filename ) : GrFmtWriter( filename ) 4216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegWriter::~GrFmtJpegWriter() 4266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegWriter::WriteImage( const uchar* data, int step, 4316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int width, int height, int /*depth*/, int _channels ) 4326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 4336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const int default_quality = 95; 4346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn struct jpeg_compress_struct cinfo; 4356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtJpegErrorMgr jerr; 4366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bool result = false; 4386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn FILE* f = 0; 4396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int channels = _channels > 1 ? 3 : 1; 4406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* buffer = 0; // temporary buffer for row flipping 4416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo.err = jpeg_std_error(&jerr.pub); 4436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jerr.pub.error_exit = error_exit; 4446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( jerr.setjmp_buffer ) == 0 ) 4466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_create_compress(&cinfo); 4486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn f = fopen( m_filename, "wb" ); 4496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( f ) 4516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_stdio_dest( &cinfo, f ); 4536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo.image_width = width; 4556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo.image_height = height; 4566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo.input_components = channels; 4576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cinfo.in_color_space = channels > 1 ? JCS_RGB : JCS_GRAYSCALE; 4586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_set_defaults( &cinfo ); 4606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_set_quality( &cinfo, default_quality, 4616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn TRUE /* limit to baseline-JPEG values */ ); 4626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_start_compress( &cinfo, TRUE ); 4636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( channels > 1 ) 4656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn buffer = new uchar[width*channels]; 4666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; height--; data += step ) 4686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* ptr = (uchar*)data; 4706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( _channels == 3 ) 4726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCvt_BGR2RGB_8u_C3R( data, 0, buffer, 0, cvSize(width,1) ); 4746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ptr = buffer; 4756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( _channels == 4 ) 4776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 4786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn icvCvt_BGRA2BGR_8u_C4C3R( data, 0, buffer, 0, cvSize(width,1), 2 ); 4796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ptr = buffer; 4806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_write_scanlines( &cinfo, &ptr, 1 ); 4836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_finish_compress( &cinfo ); 4866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = true; 4876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 4896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if(f) fclose(f); 4916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn jpeg_destroy_compress( &cinfo ); 4926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn delete[] buffer; 4946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return result; 4956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 4966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#else 4986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn////////////////////// JPEG-oriented two-level bitstream //////////////////////// 5006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennRJpegBitStream::RJpegBitStream() 5026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennRJpegBitStream::~RJpegBitStream() 5066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 5086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool RJpegBitStream::Open( const char* filename ) 5126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 5146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Allocate(); 5156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_opened = m_low_strm.Open( filename ); 5176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_is_opened ) SetPos(0); 5186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return m_is_opened; 5196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid RJpegBitStream::Close() 5236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_low_strm.Close(); 5256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_opened = false; 5266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid RJpegBitStream::ReadBlock() 5306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* end = m_start + m_block_size; 5326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* current = m_start; 5336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( m_low_strm.JmpBuf()) == 0 ) 5356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int sz = m_unGetsize; 5376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memmove( current - sz, m_end - sz, sz ); 5386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( current < end ) 5396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = m_low_strm.GetByte(); 5416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( val != 0xff ) 5426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *current++ = (uchar)val; 5446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 5466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val = m_low_strm.GetByte(); 5486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( val == 0 ) 5496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *current++ = 0xFF; 5506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( !(0xD0 <= val && val <= 0xD7) ) 5516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_low_strm.SetPos( m_low_strm.GetPos() - 2 ); 5536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto fetch_end; 5546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennfetch_end: ; 5586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 5606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( current == m_start && m_jmp_set ) 5626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn longjmp( m_jmp_buf, RBS_THROW_EOS ); 5636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_current = m_start; 5656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_end = m_start + (((current - m_start) + 3) & -4); 5666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !bsIsBigEndian() ) 5676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bsBSwapBlock( m_start, m_end ); 5686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid RJpegBitStream::Flush() 5726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_end = m_start + m_block_size; 5746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_current = m_end - 4; 5756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_bit_idx = 0; 5766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid RJpegBitStream::AlignOnByte() 5796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_bit_idx &= -8; 5816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennint RJpegBitStream::FindMarker() 5846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int code = m_low_strm.GetWord(); 5866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( (code & 0xFF00) != 0xFF00 || (code == 0xFFFF || code == 0xFF00 )) 5876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 5886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn code = ((code&255) << 8) | m_low_strm.GetByte(); 5896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 5906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return code; 5916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 5926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/****************************** JPEG (JFIF) reader ***************************/ 5956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 5966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// zigzag & IDCT prescaling (AAN algorithm) tables 5976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar zigzag[] = 5986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 5996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 8, 1, 2, 9, 16, 24, 17, 10, 3, 4, 11, 18, 25, 32, 40, 6006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 33, 26, 19, 12, 5, 6, 13, 20, 27, 34, 41, 48, 56, 49, 42, 35, 6016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 28, 21, 14, 7, 15, 22, 29, 36, 43, 50, 57, 58, 51, 44, 37, 30, 6026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 23, 31, 38, 45, 52, 59, 60, 53, 46, 39, 47, 54, 61, 62, 55, 63, 6036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63 6046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 6056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const int idct_prescale[] = 6086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 6096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, 6106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270, 6116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906, 6126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, 6136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, 6146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, 6156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446, 6166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247 6176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 6186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define fixb 14 6216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define fix(x, n) (int)((x)*(1 << (n)) + .5) 6226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define fix1(x, n) (x) 6236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define fixmul(x) (x) 6246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C0_707 fix( 0.707106781f, fixb ) 6266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C0_924 fix( 0.923879533f, fixb ) 6276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C0_541 fix( 0.541196100f, fixb ) 6286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C0_382 fix( 0.382683432f, fixb ) 6296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C1_306 fix( 1.306562965f, fixb ) 6306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C1_082 fix( 1.082392200f, fixb ) 6326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C1_414 fix( 1.414213562f, fixb ) 6336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C1_847 fix( 1.847759065f, fixb ) 6346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define C2_613 fix( 2.613125930f, fixb ) 6356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define fixc 12 6376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define b_cb fix( 1.772, fixc ) 6386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define g_cb -fix( 0.34414, fixc ) 6396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define g_cr -fix( 0.71414, fixc ) 6406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define r_cr fix( 1.402, fixc ) 6416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define y_r fix( 0.299, fixc ) 6436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define y_g fix( 0.587, fixc ) 6446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define y_b fix( 0.114, fixc ) 6456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cb_r -fix( 0.1687, fixc ) 6476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cb_g -fix( 0.3313, fixc ) 6486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cb_b fix( 0.5, fixc ) 6496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cr_r fix( 0.5, fixc ) 6516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cr_g -fix( 0.4187, fixc ) 6526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define cr_b -fix( 0.0813, fixc ) 6536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// IDCT without prescaling 6566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void aan_idct8x8( int *src, int *dst, int step ) 6576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 6586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int workspace[64], *work = workspace; 6596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i; 6606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Pass 1: process rows */ 6626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 8; i > 0; i--, src += 8, work += 8 ) 6636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 6646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Odd part */ 6656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x0 = src[5], x1 = src[3]; 6666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x2 = src[1], x3 = src[7]; 6676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x4 = x0 + x1; x0 -= x1; 6696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 6716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x1 + x4; x1 -= x4; 6726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = (x0 + x2)*C1_847; 6746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale( x4 - x0*C2_613, fixb); 6756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale( x2*C1_082 - x4, fixb); 6766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale( x1*C1_414, fixb); 6776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 -= x3; 6796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 -= x0; 6806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 += x1; 6816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[7] = x3; work[6] = x0; 6836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[5] = x1; work[4] = x2; 6846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Even part */ 6866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = src[2]; x3 = src[6]; 6876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = src[0]; x1 = src[4]; 6886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x2 + x3; 6906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale((x2-x3)*C1_414, fixb) - x4; 6916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x0 + x1; x0 -= x1; 6936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x3 + x4; x3 -= x4; 6946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x0 + x2; x0 -= x2; 6956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 6966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = work[7]; 6976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 -= x2; x2 = 2*x2 + x1; 6986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[7] = x1; work[0] = x2; 6996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = work[6]; 7016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x4 + x2; x4 -= x2; 7026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[1] = x1; work[6] = x4; 7036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = work[5]; x2 = work[4]; 7056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x0 + x1; x0 -= x1; 7066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x3 + x2; x3 -= x2; 7076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[2] = x4; work[5] = x0; 7096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[3] = x3; work[4] = x1; 7106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Pass 2: process columns */ 7136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work = workspace; 7146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 8; i > 0; i--, dst += step, work++ ) 7156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Odd part */ 7176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x0 = work[8*5], x1 = work[8*3]; 7186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x2 = work[8*1], x3 = work[8*7]; 7196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x4 = x0 + x1; x0 -= x1; 7216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 7226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x1 + x4; x1 -= x4; 7236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = (x0 + x2)*C1_847; 7256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale( x4 - x0*C2_613, fixb); 7266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale( x2*C1_082 - x4, fixb); 7276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale( x1*C1_414, fixb); 7286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 -= x3; 7306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 -= x0; 7316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 += x1; 7326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[7] = x3; dst[6] = x0; 7346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[5] = x1; dst[4] = x2; 7356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn /* Even part */ 7376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = work[8*2]; x3 = work[8*6]; 7386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = work[8*0]; x1 = work[8*4]; 7396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x2 + x3; 7416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale((x2-x3)*C1_414, fixb) - x4; 7426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x0 + x1; x0 -= x1; 7446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x3 + x4; x3 -= x4; 7456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x0 + x2; x0 -= x2; 7466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = dst[7]; 7486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 -= x2; x2 = 2*x2 + x1; 7496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale(x1,3); 7506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale(x2,3); 7516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[7] = x1; dst[0] = x2; 7536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = dst[6]; 7556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale(x4 + x2,3); 7566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = descale(x4 - x2,3); 7576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[1] = x1; dst[6] = x4; 7586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = dst[5]; x2 = dst[4]; 7606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = descale(x0 + x1,3); 7626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale(x0 - x1,3); 7636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale(x3 + x2,3); 7646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = descale(x3 - x2,3); 7656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[2] = x4; dst[5] = x0; 7676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[3] = x3; dst[4] = x1; 7686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 7706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const int max_dec_htable_size = 1 << 12; 7736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const int first_table_bits = 9; 7746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegReader::GrFmtJpegReader( const char* filename ) : GrFmtReader( filename ) 7766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 7776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_planes= -1; 7786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_offset= -1; 7796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i; 7816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < 4; i++ ) 7826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_td[i] = new short[max_dec_htable_size]; 7846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ta[i] = new short[max_dec_htable_size]; 7856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 7876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 7896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegReader::~GrFmtJpegReader() 7906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 7916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( int i = 0; i < 4; i++ ) 7926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 7936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn delete[] m_td[i]; 7946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_td[i] = 0; 7956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn delete[] m_ta[i]; 7966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ta[i] = 0; 7976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 7986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 7996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid GrFmtJpegReader::Close() 8026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 8036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Close(); 8046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GrFmtReader::Close(); 8056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 8066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::ReadHeader() 8096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 8106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn char buffer[16]; 8116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i; 8126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bool result = false, is_sof = false, 8136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_qt = false, is_ht = false, is_sos = false; 8146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( strlen(m_filename) != 0 ); 8166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !m_strm.Open( m_filename )) return false; 8176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( m_is_tq, 0, sizeof(m_is_tq)); 8196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( m_is_td, 0, sizeof(m_is_td)); 8206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( m_is_ta, 0, sizeof(m_is_ta)); 8216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_MCUs = 0; 8226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( m_strm.JmpBuf()) == 0 ) 8246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn RMByteStream& lstrm = m_strm.m_low_strm; 8266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.Skip( 2 ); // skip SOI marker 8286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 8306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int marker = m_strm.FindMarker() & 255; 8326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // check for standalone markers 8346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( marker != 0xD8 /* SOI */ && marker != 0xD9 /* EOI */ && 8356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn marker != 0x01 /* TEM */ && !( 0xD0 <= marker && marker <= 0xD7 )) 8366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int pos = lstrm.GetPos(); 8386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int length = lstrm.GetWord(); 8396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn switch( marker ) 8416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xE0: // APP0 8436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.GetBytes( buffer, 5 ); 8446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( strcmp(buffer, "JFIF") == 0 ) // JFIF identification 8456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_version = lstrm.GetWord(); 8476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn //is_jfif = true; 8486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 8506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xC0: // SOF0 8526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_precision = lstrm.GetByte(); 8536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_height = lstrm.GetWord(); 8546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_width = lstrm.GetWord(); 8556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_planes = lstrm.GetByte(); 8566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_width == 0 || m_height == 0 || // DNL not supported 8586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (m_planes != 1 && m_planes != 3)) goto parsing_end; 8596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_iscolor = m_planes == 3; 8616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( m_ci, -1, sizeof(m_ci)); 8636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < m_planes; i++ ) 8656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx = lstrm.GetByte(); 8676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( idx < 1 || idx > m_planes ) // wrong index 8696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 8706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn idx = i+1; // hack 8716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cmp_info& ci = m_ci[idx-1]; 8736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ci.tq > 0 /* duplicated description */) goto parsing_end; 8756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.h = (char)lstrm.GetByte(); 8776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.v = (char)(ci.h & 15); 8786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.h >>= 4; 8796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.tq = (char)lstrm.GetByte(); 8806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !((ci.h == 1 || ci.h == 2 || ci.h == 4) && 8816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (ci.v == 1 || ci.v == 2 || ci.v == 4) && 8826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.tq < 3) || 8836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // chroma mcu-parts should have equal sizes and 8846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // be non greater then luma sizes 8856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn !( i != 2 || (ci.h == m_ci[1].h && ci.v == m_ci[1].v && 8866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ci.h <= m_ci[0].h && ci.v <= m_ci[0].v))) 8876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto parsing_end; 8886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 8896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_sof = true; 8906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_type = marker - 0xC0; 8916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 8926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xDB: // DQT 8946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !LoadQuantTables( length )) goto parsing_end; 8956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_qt = true; 8966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 8976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 8986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xC4: // DHT 8996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !LoadHuffmanTables( length )) goto parsing_end; 9006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_ht = true; 9016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 9026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xDA: // SOS 9046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn is_sos = true; 9056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_offset = pos - 2; 9066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto parsing_end; 9076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xDD: // DRI 9096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_MCUs = lstrm.GetWord(); 9106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 9116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.SetPos( pos + length ); 9136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennparsing_end: ; 9166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn result = /*is_jfif &&*/ is_sof && is_qt && is_ht && is_sos; 9196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !result ) 9206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_width = m_height = -1; 9226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_offset = -1; 9236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Close(); 9246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return result; 9266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 9276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::LoadQuantTables( int length ) 9306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 9316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar buffer[128]; 9326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, tq_size; 9336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn RMByteStream& lstrm = m_strm.m_low_strm; 9356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= 2; 9366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( length > 0 ) 9386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int tq = lstrm.GetByte(); 9406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int size = tq >> 4; 9416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tq &= 15; 9426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn tq_size = (64<<size) + 1; 9446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( tq > 3 || size > 1 || length < tq_size ) return false; 9456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= tq_size; 9466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.GetBytes( buffer, tq_size - 1 ); 9486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( size == 0 ) // 8 bit quant factors 9506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < 64; i++ ) 9526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx = zigzag[i]; 9546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_tq[tq][idx] = buffer[i] * 16 * idct_prescale[idx]; 9556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else // 16 bit quant factors 9586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < 64; i++ ) 9606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx = zigzag[i]; 9626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_tq[tq][idx] = ((unsigned short*)buffer)[i] * idct_prescale[idx]; 9636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_tq[tq] = true; 9666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 9676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return true; 9696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 9706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::LoadHuffmanTables( int length ) 9736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 9746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const int max_bits = 16; 9756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar buffer[1024]; 9766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int buffer2[1024]; 9776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, ht_size; 9796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn RMByteStream& lstrm = m_strm.m_low_strm; 9806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= 2; 9816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( length > 0 ) 9836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 9846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int t = lstrm.GetByte(); 9856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int hclass = t >> 4; 9866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t &= 15; 9876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( t > 3 || hclass > 1 || length < 17 ) return false; 9896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= 17; 9906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.GetBytes( buffer, max_bits ); 9926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0, ht_size = 0; i < max_bits; i++ ) ht_size += buffer[i]; 9936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( length < ht_size ) return false; 9956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn length -= ht_size; 9966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.GetBytes( buffer + max_bits, ht_size ); 9986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 9996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !::bsCreateDecodeHuffmanTable( 10006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ::bsCreateSourceHuffmanTable( 10016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn buffer, buffer2, max_bits, first_table_bits ), 10026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn hclass == 0 ? m_td[t] : m_ta[t], 10036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn max_dec_htable_size )) return false; 10046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( hclass == 0 ) 10056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_td[t] = true; 10066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 10076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_ta[t] = true; 10086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return true; 10106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 10116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegReader::ReadData( uchar* data, int step, int color ) 10146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 10156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_offset < 0 || !m_strm.IsOpened()) 10166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return false; 10176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( setjmp( m_strm.JmpBuf()) == 0 ) 10196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn RMByteStream& lstrm = m_strm.m_low_strm; 10216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lstrm.SetPos( m_offset ); 10226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 10246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int marker = m_strm.FindMarker() & 255; 10266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( marker == 0xD8 /* SOI */ || marker == 0xD9 /* EOI */ ) 10286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto decoding_end; 10296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // check for standalone markers 10316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( marker != 0x01 /* TEM */ && !( 0xD0 <= marker && marker <= 0xD7 )) 10326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int pos = lstrm.GetPos(); 10346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int length = lstrm.GetWord(); 10356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn switch( marker ) 10376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xC4: // DHT 10396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !LoadHuffmanTables( length )) goto decoding_end; 10406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 10416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xDA: // SOS 10436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // read scan header 10446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx[3] = { -1, -1, -1 }; 10466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, ns = lstrm.GetByte(); 10476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int sum = 0, a; // spectral selection & approximation 10486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ns != m_planes ) goto decoding_end; 10506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < ns; i++ ) 10516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int td, ta, c = lstrm.GetByte() - 1; 10536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( c < 0 || m_planes <= c ) 10546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 10556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn c = i; // hack 10566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( idx[c] != -1 ) goto decoding_end; 10596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn idx[i] = c; 10606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn td = lstrm.GetByte(); 10616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ta = td & 15; 10626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn td >>= 4; 10636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !(ta <= 3 && m_is_ta[ta] && 10646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn td <= 3 && m_is_td[td] && 10656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_tq[m_ci[c].tq]) ) 10666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto decoding_end; 10676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ci[c].td = (char)td; 10696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ci[c].ta = (char)ta; 10706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn sum += m_ci[c].h*m_ci[c].v; 10726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( sum > 10 ) goto decoding_end; 10756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ss = lstrm.GetByte(); 10776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_se = lstrm.GetByte(); 10786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn a = lstrm.GetByte(); 10806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_al = a & 15; 10816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ah = a >> 4; 10826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ProcessScan( idx, ns, data, step, color ); 10846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn goto decoding_end; // only single scan case is supported now 10856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn //m_offset = pos - 2; 10886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn //break; 10896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn case 0xDD: // DRI 10916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_MCUs = lstrm.GetWord(); 10926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn break; 10936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( marker != 0xDA ) lstrm.SetPos( pos + length ); 10966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 10986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renndecoding_end: ; 10996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return true; 11026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 11036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid GrFmtJpegReader::ResetDecoder() 11066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 11076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ci[0].dc_pred = m_ci[1].dc_pred = m_ci[2].dc_pred = 0; 11086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 11096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid GrFmtJpegReader::ProcessScan( int* idx, int ns, uchar* data, int step, int color ) 11116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 11126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, s = 0, mcu, x1 = 0, y1 = 0; 11136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int temp[64]; 11146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int blocks[10][64]; 11156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int pos[3], h[3], v[3]; 11166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x_shift = 0, y_shift = 0; 11176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int nch = color ? 3 : 1; 11186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( ns == m_planes && m_ss == 0 && m_se == 63 && 11206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_al == 0 && m_ah == 0 ); // sequental & single scan 11216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( idx[0] == 0 && (ns ==1 || (idx[1] == 1 && idx[2] == 2))); 11236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < ns; i++ ) 11256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int c = idx[i]; 11276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn h[c] = m_ci[c].h*8; 11286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn v[c] = m_ci[c].v*8; 11296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn pos[c] = s >> 6; 11306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn s += h[c]*v[c]; 11316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ns == 3 ) 11346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x_shift = h[0]/(h[1]*2); 11366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn y_shift = v[0]/(v[1]*2); 11376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Flush(); 11406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ResetDecoder(); 11416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( mcu = 0;; mcu++ ) 11436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x2, y2, x, y, xc; 11456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* cmp; 11466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* data1; 11476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( mcu == m_MCUs && m_MCUs != 0 ) 11496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ResetDecoder(); 11516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.AlignOnByte(); 11526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn mcu = 0; 11536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Get mcu 11566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < ns; i++ ) 11576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int c = idx[i]; 11596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cmp = blocks[pos[c]]; 11606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( y = 0; y < v[c]; y += 8, cmp += h[c]*8 ) 11616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( x = 0; x < h[c]; x += 8 ) 11626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn GetBlock( temp, c ); 11646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i < (color ? 3 : 1)) 11656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn aan_idct8x8( temp, cmp + x, h[c] ); 11676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn y2 = v[0]; 11726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = h[0]; 11736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( y1 + y2 > m_height ) y2 = m_height - y1; 11756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( x1 + x2 > m_width ) x2 = m_width - x1; 11766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cmp = blocks[0]; 11786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1 = data + x1*nch; 11796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ns == 1 ) 11816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( y = 0; y < y2; y++, data1 += step, cmp += h[0] ) 11826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( color ) 11846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( x = 0; x < x2; x++ ) 11866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = descale( cmp[x] + 128*4, 2 ); 11886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3] = data1[x*3 + 1] = data1[x*3 + 2] = saturate( val ); 11896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 11926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( x = 0; x < x2; x++ ) 11946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 11956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = descale( cmp[x] + 128*4, 2 ); 11966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x] = saturate( val ); 11976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 11996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 12016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( y = 0; y < y2; y++, data1 += step, cmp += h[0] ) 12036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( color ) 12056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int shift = h[1]*(y >> y_shift); 12076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* cmpCb = blocks[pos[1]] + shift; 12086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* cmpCr = blocks[pos[2]] + shift; 12096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x = 0; 12106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( x_shift == 0 ) 12116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; x < x2; x++ ) 12136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Y = (cmp[x] + 128*4) << fixc; 12156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cb = cmpCb[x]; 12166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cr = cmpCr[x]; 12176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int t = (Y + Cb*b_cb) >> (fixc + 2); 12186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3] = saturate(t); 12196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cb*g_cb + Cr*g_cr) >> (fixc + 2); 12206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 1] = saturate(t); 12216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cr*r_cr) >> (fixc + 2); 12226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 2] = saturate(t); 12236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else if( x_shift == 1 ) 12266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( xc = 0; x <= x2 - 2; x += 2, xc++ ) 12286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Y = (cmp[x] + 128*4) << fixc; 12306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cb = cmpCb[xc]; 12316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cr = cmpCr[xc]; 12326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int t = (Y + Cb*b_cb) >> (fixc + 2); 12336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3] = saturate(t); 12346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cb*g_cb + Cr*g_cr) >> (fixc + 2); 12356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 1] = saturate(t); 12366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cr*r_cr) >> (fixc + 2); 12376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 2] = saturate(t); 12386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Y = (cmp[x+1] + 128*4) << fixc; 12396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cb*b_cb) >> (fixc + 2); 12406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 3] = saturate(t); 12416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cb*g_cb + Cr*g_cr) >> (fixc + 2); 12426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 4] = saturate(t); 12436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cr*r_cr) >> (fixc + 2); 12446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 5] = saturate(t); 12456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( ; x < x2; x++ ) 12486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Y = (cmp[x] + 128*4) << fixc; 12506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cb = cmpCb[x >> x_shift]; 12516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Cr = cmpCr[x >> x_shift]; 12526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int t = (Y + Cb*b_cb) >> (fixc + 2); 12536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3] = saturate(t); 12546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cb*g_cb + Cr*g_cr) >> (fixc + 2); 12556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 1] = saturate(t); 12566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn t = (Y + Cr*r_cr) >> (fixc + 2); 12576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x*3 + 2] = saturate(t); 12586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 12616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( x = 0; x < x2; x++ ) 12636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = descale( cmp[x] + 128*4, 2 ); 12656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data1[x] = saturate(val); 12666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 += h[0]; 12726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( x1 >= m_width ) 12736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 12746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = 0; 12756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn y1 += v[0]; 12766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn data += v[0]*step; 12776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( y1 >= m_height ) break; 12786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 12806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 12816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid GrFmtJpegReader::GetBlock( int* block, int c ) 12846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 12856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( block, 0, 64*sizeof(block[0]) ); 12866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( 0 <= c && c < 3 ); 12886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const short* td = m_td[m_ci[c].td]; 12896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const short* ta = m_ta[m_ci[c].ta]; 12906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const int* tq = m_tq[m_ci[c].tq]; 12916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Get DC coefficient 12936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i = 0, cat = m_strm.GetHuff( td ); 12946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int mask = bs_bit_mask[cat]; 12956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = m_strm.Get( cat ); 12966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 12976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val -= (val*2 <= mask ? mask : 0); 12986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_ci[c].dc_pred = val += m_ci[c].dc_pred; 12996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn block[0] = descale(val * tq[0],16); 13016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Get AC coeffs 13036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for(;;) 13046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cat = m_strm.GetHuff( ta ); 13066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( cat == 0 ) break; // end of block 13076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i += (cat >> 4) + 1; 13096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cat &= 15; 13106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn mask = bs_bit_mask[cat]; 13116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val = m_strm.Get( cat ); 13126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn cat = zigzag[i]; 13136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val -= (val*2 <= mask ? mask : 0); 13146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn block[cat] = descale(val * tq[cat], 16); 13156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( i <= 63 ); 13166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i >= 63 ) break; 13176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn////////////////////// WJpegStream /////////////////////// 13216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennWJpegBitStream::WJpegBitStream() 13236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennWJpegBitStream::~WJpegBitStream() 13286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 13306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_opened = false; 13316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool WJpegBitStream::Open( const char* filename ) 13366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Close(); 13386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Allocate(); 13396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_opened = m_low_strm.Open( filename ); 13416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_is_opened ) 13426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_block_pos = 0; 13446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ResetBuffer(); 13456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return m_is_opened; 13476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid WJpegBitStream::Close() 13516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( m_is_opened ) 13536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Flush(); 13556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_low_strm.Close(); 13566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_is_opened = false; 13576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid WJpegBitStream::Flush() 13626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Put( -1, m_bit_idx & 31 ); 13646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn *((ulong*&)m_current)++ = m_val; 13656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn WriteBlock(); 13666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ResetBuffer(); 13676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennvoid WJpegBitStream::WriteBlock() 13716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn uchar* ptr = m_start; 13736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !bsIsBigEndian() ) 13746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bsBSwapBlock( m_start, m_current ); 13756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( ptr < m_current ) 13776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int val = *ptr++; 13796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_low_strm.PutByte( val ); 13806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( val == 0xff ) 13816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 13826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_low_strm.PutByte( 0 ); 13836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 13856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_current = m_start; 13876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/////////////////////// GrFmtJpegWriter /////////////////// 13916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegWriter::GrFmtJpegWriter( const char* filename ) : GrFmtWriter( filename ) 13936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 13966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius RennGrFmtJpegWriter::~GrFmtJpegWriter() 13976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 13986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 13996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Standard JPEG quantization tables 14016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK1_T[] = 14026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16, 12, 14, 14, 18, 24, 49, 72, 14046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 11, 12, 13, 17, 22, 35, 64, 92, 14056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 10, 14, 16, 22, 37, 55, 78, 95, 14066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16, 19, 24, 29, 56, 64, 87, 98, 14076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 24, 26, 40, 51, 68, 81, 103, 112, 14086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 40, 58, 57, 87, 109, 104, 121, 100, 14096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 51, 60, 69, 80, 103, 113, 120, 103, 14106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 61, 55, 56, 62, 77, 92, 101, 99 14116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK2_T[] = 14156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17, 18, 24, 47, 99, 99, 99, 99, 14176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18, 21, 26, 66, 99, 99, 99, 99, 14186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 24, 26, 56, 99, 99, 99, 99, 99, 14196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 47, 66, 99, 99, 99, 99, 99, 99, 14206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 99, 99, 99, 99, 99, 99, 99, 99, 14216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 99, 99, 99, 99, 99, 99, 99, 99, 14226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 99, 99, 99, 99, 99, 99, 99, 99, 14236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 99, 99, 99, 99, 99, 99, 99, 99 14246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// Standard Huffman tables 14286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// ... for luma DCs. 14306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK3[] = 14316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 14336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 14346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// ... for chroma DCs. 14386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK4[] = 14396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 14416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 14426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// ... for luma ACs. 14466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK5[] = 14476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125, 14496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 14506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 14516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 14526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 14536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 14546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 14556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 14566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 14576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 14586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 14596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 14606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 14616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 14626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 14636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 14646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 14656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 14666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 14676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 14686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 14696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf9, 0xfa 14706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// ... for chroma ACs 14736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const uchar jpegTableK6[] = 14746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 14756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119, 14766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 14776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 14786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 14796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 14806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 14816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 14826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 14836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 14846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 14856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 14866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 14876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 14886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 14896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 14906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 14916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 14926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 14936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 14946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 14956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 14966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 0xf9, 0xfa 14976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn}; 14986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 14996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic const char jpegHeader[] = 15016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\xFF\xD8" // SOI - start of image 15026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\xFF\xE0" // APP0 - jfif extention 15036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\x00\x10" // 2 bytes: length of APP0 segment 15046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "JFIF\x00" // JFIF signature 15056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\x01\x02" // version of JFIF 15066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\x00" // units = pixels ( 1 - inch, 2 - cm ) 15076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\x00\x01\x00\x01" // 2 2-bytes values: x density & y density 15086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn "\x00\x00"; // width & height of thumbnail: ( 0x0 means no thumbnail) 15096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#define postshift 14 15116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn// FDCT with postscaling 15136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennstatic void aan_fdct8x8( int *src, int *dst, 15146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int step, const int *postscale ) 15156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 15166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int workspace[64], *work = workspace; 15176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i; 15186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Pass 1: process rows 15206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 8; i > 0; i--, src += step, work += 8 ) 15216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 15226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x0 = src[0], x1 = src[7]; 15236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x2 = src[3], x3 = src[4]; 15246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x4 = x0 + x1; x0 -= x1; 15266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 15276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[7] = x0; work[1] = x2; 15296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = x4 + x1; x4 -= x1; 15306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = src[1]; x3 = src[6]; 15326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x0 + x3; x0 -= x3; 15336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[5] = x0; 15346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = src[2]; x3 = src[5]; 15366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[3] = x0 - x3; x0 += x3; 15376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x0 + x1; x0 -= x1; 15396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 15406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[0] = x1; work[4] = x2; 15426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale((x0 - x4)*C0_707, fixb); 15446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x4 + x0; x4 -= x0; 15456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[2] = x4; work[6] = x1; 15466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = work[1]; x1 = work[3]; 15486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = work[5]; x3 = work[7]; 15496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 += x1; x1 += x2; x2 += x3; 15516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale(x1*C0_707, fixb); 15526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x1 + x3; x3 -= x1; 15546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = (x0 - x2)*C0_382; 15556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale(x0*C0_541 + x1, fixb); 15566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale(x2*C1_306 + x1, fixb); 15576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x0 + x3; x3 -= x0; 15596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = x4 + x2; x4 -= x2; 15606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[5] = x1; work[1] = x0; 15626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[7] = x4; work[3] = x3; 15636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 15646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work = workspace; 15666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // pass 2: process columns 15676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 8; i > 0; i--, work++, postscale += 8, dst += 8 ) 15686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 15696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x0 = work[8*0], x1 = work[8*7]; 15706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x2 = work[8*3], x3 = work[8*4]; 15716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x4 = x0 + x1; x0 -= x1; 15736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 15746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[8*7] = x0; work[8*0] = x2; 15766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = x4 + x1; x4 -= x1; 15776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = work[8*1]; x3 = work[8*6]; 15796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x0 + x3; x0 -= x3; 15806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[8*4] = x0; 15816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = work[8*2]; x3 = work[8*5]; 15836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn work[8*3] = x0 - x3; x0 += x3; 15846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x3 = x0 + x1; x0 -= x1; 15866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x2 + x3; x2 -= x3; 15876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[0] = descale(x1*postscale[0], postshift); 15896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[4] = descale(x2*postscale[4], postshift); 15906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale((x0 - x4)*C0_707, fixb); 15926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x4 + x0; x4 -= x0; 15936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[2] = descale(x4*postscale[2], postshift); 15956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[6] = descale(x1*postscale[6], postshift); 15966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 15976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = work[8*0]; x1 = work[8*3]; 15986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = work[8*4]; x3 = work[8*7]; 15996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 += x1; x1 += x2; x2 += x3; 16016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = descale(x1*C0_707, fixb); 16026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x4 = x1 + x3; x3 -= x1; 16046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = (x0 - x2)*C0_382; 16056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = descale(x0*C0_541 + x1, fixb); 16066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x2 = descale(x2*C1_306 + x1, fixb); 16076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x1 = x0 + x3; x3 -= x0; 16096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn x0 = x4 + x2; x4 -= x2; 16106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[5] = descale(x1*postscale[5], postshift); 16126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[1] = descale(x0*postscale[1], postshift); 16136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[7] = descale(x4*postscale[7], postshift); 16146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dst[3] = descale(x3*postscale[3], postshift); 16156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 16166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 16176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Rennbool GrFmtJpegWriter::WriteImage( const uchar* data, int step, 16206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int width, int height, int /*depth*/, int _channels ) 16216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn{ 16226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( data && width > 0 && height > 0 ); 16236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( !m_strm.Open( m_filename ) ) return false; 16256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // encode the header and tables 16276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // for each mcu: 16286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // convert rgb to yuv with downsampling (if color). 16296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // for every block: 16306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // calc dct and quantize 16316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // encode block. 16326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x, y; 16336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int i, j; 16346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const int max_quality = 12; 16356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int quality = max_quality; 16366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn WMByteStream& lowstrm = m_strm.m_low_strm; 16376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int fdct_qtab[2][64]; 16386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ulong huff_dc_tab[2][16]; 16396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn ulong huff_ac_tab[2][256]; 16406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int channels = _channels > 1 ? 3 : 1; 16416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x_scale = channels > 1 ? 2 : 1, y_scale = x_scale; 16426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int dc_pred[] = { 0, 0, 0 }; 16436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x_step = x_scale * 8; 16446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int y_step = y_scale * 8; 16456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int block[6][64]; 16466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int buffer[1024]; 16476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int luma_count = x_scale*y_scale; 16486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int block_count = luma_count + channels - 1; 16496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Y_step = x_scale*8; 16506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const int UV_step = 16; 16516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn double inv_quality; 16526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( quality < 3 ) quality = 3; 16546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( quality > max_quality ) quality = max_quality; 16556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn inv_quality = 1./quality; 16576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Encode header 16596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutBytes( jpegHeader, sizeof(jpegHeader) - 1 ); 16606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Encode quantization tables 16626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < (channels > 1 ? 2 : 1); i++ ) 16636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 16646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const uchar* qtable = i == 0 ? jpegTableK1_T : jpegTableK2_T; 16656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int chroma_scale = i > 0 ? luma_count : 1; 16666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 0xffdb ); // DQT marker 16686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 2 + 65*1 ); // put single qtable 16696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( 0*16 + i ); // 8-bit table 16706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // put coefficients 16726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < 64; j++ ) 16736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 16746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx = zigzag[j]; 16756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int qval = cvRound(qtable[idx]*inv_quality); 16766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( qval < 1 ) 16776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn qval = 1; 16786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( qval > 255 ) 16796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn qval = 255; 16806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn fdct_qtab[i][idx] = cvRound((1 << (postshift + 9))/ 16816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn (qval*chroma_scale*idct_prescale[idx])); 16826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( qval ); 16836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 16846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 16856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Encode huffman tables 16876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < (channels > 1 ? 4 : 2); i++ ) 16886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 16896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const uchar* htable = i == 0 ? jpegTableK3 : i == 1 ? jpegTableK5 : 16906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn i == 2 ? jpegTableK4 : jpegTableK6; 16916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int is_ac_tab = i & 1; 16926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int idx = i >= 2; 16936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int tableSize = 16 + (is_ac_tab ? 162 : 12); 16946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 16956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 0xFFC4 ); // DHT marker 16966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 3 + tableSize ); // define one huffman table 16976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( is_ac_tab*16 + idx ); // put DC/AC flag and table index 16986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutBytes( htable, tableSize ); // put table 16996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn bsCreateEncodeHuffmanTable( bsCreateSourceHuffmanTable( 17016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn htable, buffer, 16, 9 ), is_ac_tab ? huff_ac_tab[idx] : 17026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn huff_dc_tab[idx], is_ac_tab ? 256 : 16 ); 17036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // put frame header 17066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 0xFFC0 ); // SOF0 marker 17076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 8 + 3*channels ); // length of frame header 17086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( 8 ); // sample precision 17096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( height ); 17106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( width ); 17116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( channels ); // number of components 17126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < channels; i++ ) 17146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( i + 1 ); // (i+1)-th component id (Y,U or V) 17166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( i == 0 ) 17176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte(x_scale*16 + y_scale); // chroma scale factors 17186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 17196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte(1*16 + 1); 17206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( i > 0 ); // quantization table idx 17216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // put scan header 17246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 0xFFDA ); // SOS marker 17256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 6 + 2*channels ); // length of scan header 17266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( channels ); // number of components in the scan 17276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < channels; i++ ) 17296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( i+1 ); // component id 17316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( (i>0)*16 + (i>0) );// selection of DC & AC tables 17326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord(0*256 + 63);// start and end of spectral selection - for 17356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // sequental DCT start is 0 and end is 63 17366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutByte( 0 ); // successive approximation bit position 17386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // high & low - (0,0) for sequental DCT 17396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // encode data 17416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( y = 0; y < height; y += y_step, data += y_step*step ) 17426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( x = 0; x < width; x += x_step ) 17446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int x_limit = x_step; 17466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int y_limit = y_step; 17476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const uchar* rgb_data = data + x*_channels; 17486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* Y_data = block[0]; 17496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( x + x_limit > width ) x_limit = width - x; 17516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( y + y_limit > height ) y_limit = height - y; 17526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn memset( block, 0, block_count*64*sizeof(block[0][0])); 17546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( channels > 1 ) 17566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* UV_data = block[luma_count]; 17586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < y_limit; i++, rgb_data += step, Y_data += Y_step ) 17606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < x_limit; j++, rgb_data += _channels ) 17626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int r = rgb_data[2]; 17646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int g = rgb_data[1]; 17656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int b = rgb_data[0]; 17666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17676acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int Y = descale( r*y_r + g*y_g + b*y_b, fixc - 2) - 128*4; 17686acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int U = descale( r*cb_r + g*cb_g + b*cb_b, fixc - 2 ); 17696acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int V = descale( r*cr_r + g*cr_g + b*cr_b, fixc - 2 ); 17706acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int j2 = j >> (x_scale - 1); 17716acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17726acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Y_data[j] = Y; 17736acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn UV_data[j2] += U; 17746acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn UV_data[j2 + 8] += V; 17756acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17766acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17776acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn rgb_data -= x_limit*_channels; 17786acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( ((i+1) & (y_scale - 1)) == 0 ) 17796acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17806acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn UV_data += UV_step; 17816acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17826acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17836acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17846acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 17856acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17866acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < y_limit; i++, rgb_data += step, Y_data += Y_step ) 17876acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17886acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 0; j < x_limit; j++ ) 17896acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn Y_data[j] = rgb_data[j]*4 - 128*4; 17906acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17916acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 17926acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 17936acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( i = 0; i < block_count; i++ ) 17946acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 17956acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int is_chroma = i >= luma_count; 17966acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int src_step = x_scale * 8; 17976acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int run = 0, val; 17986acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int* src_ptr = block[i & -2] + (i & 1)*8; 17996acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn const ulong* htable = huff_ac_tab[is_chroma]; 18006acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18016acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn aan_fdct8x8( src_ptr, buffer, src_step, fdct_qtab[is_chroma] ); 18026acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18036acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn j = is_chroma + (i > luma_count); 18046acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val = buffer[0] - dc_pred[j]; 18056acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn dc_pred[j] = buffer[0]; 18066acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18076acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18086acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn float a = (float)val; 18096acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int cat = (((int&)a >> 23) & 255) - (126 & (val ? -1 : 0)); 18106acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18116acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( cat <= 11 ); 18126acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.PutHuff( cat, huff_dc_tab[is_chroma] ); 18136acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Put( val - (val < 0 ? 1 : 0), cat ); 18146acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18156acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18166acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn for( j = 1; j < 64; j++ ) 18176acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18186acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn val = buffer[zigzag[j]]; 18196acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18206acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( val == 0 ) 18216acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18226acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn run++; 18236acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18246acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn else 18256acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18266acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn while( run >= 16 ) 18276acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18286acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.PutHuff( 0xF0, htable ); // encode 16 zeros 18296acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn run -= 16; 18306acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18316acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18326acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18336acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn float a = (float)val; 18346acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn int cat = (((int&)a >> 23) & 255) - (126 & (val ? -1 : 0)); 18356acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18366acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn assert( cat <= 10 ); 18376acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.PutHuff( cat + run*16, htable ); 18386acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Put( val - (val < 0 ? 1 : 0), cat ); 18396acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18406acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18416acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn run = 0; 18426acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18436acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18446acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18456acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn if( run ) 18466acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn { 18476acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.PutHuff( 0x00, htable ); // encode EOB 18486acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18496acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18506acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18516acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn } 18526acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18536acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn // Flush 18546acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Flush(); 18556acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18566acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn lowstrm.PutWord( 0xFFD9 ); // EOI marker 18576acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn m_strm.Close(); 18586acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18596acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn return true; 18606acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn} 18616acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18626acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn#endif 18636acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18646acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn/* End of file. */ 18656acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 18666acb9a7ea3d7564944e12cbc73a857b88c1301eeMarius Renn 1867