2010-05-12 01:44:00 +08:00
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/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// Intel License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000, Intel Corporation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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#include "grfmt_jpeg.hpp"
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#ifdef HAVE_JPEG
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2012-03-17 05:21:04 +08:00
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#ifdef _MSC_VER
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2012-06-12 22:46:12 +08:00
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//interaction between '_setjmp' and C++ object destruction is non-portable
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#pragma warning(disable: 4611)
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2012-03-17 05:21:04 +08:00
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#endif
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2010-05-12 01:44:00 +08:00
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#include <stdio.h>
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#include <setjmp.h>
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#ifdef WIN32
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#define XMD_H // prevent redefinition of INT32
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#undef FAR // prevent FAR redefinition
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#endif
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#if defined WIN32 && defined __GNUC__
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typedef unsigned char boolean;
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#endif
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2012-12-31 08:17:36 +08:00
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#undef FALSE
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#undef TRUE
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2010-05-12 01:44:00 +08:00
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extern "C" {
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#include "jpeglib.h"
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}
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namespace cv
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{
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2012-06-12 22:46:12 +08:00
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#ifdef _MSC_VER
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# pragma warning(push)
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# pragma warning(disable:4324) //structure was padded due to __declspec(align())
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#endif
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2010-05-12 01:44:00 +08:00
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struct JpegErrorMgr
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{
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struct jpeg_error_mgr pub;
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jmp_buf setjmp_buffer;
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};
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2012-06-12 22:46:12 +08:00
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#ifdef _MSC_VER
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# pragma warning(pop)
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#endif
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2010-05-12 01:44:00 +08:00
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struct JpegSource
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{
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struct jpeg_source_mgr pub;
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int skip;
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};
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struct JpegState
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{
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jpeg_decompress_struct cinfo; // IJG JPEG codec structure
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JpegErrorMgr jerr; // error processing manager state
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JpegSource source; // memory buffer source
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};
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/////////////////////// Error processing /////////////////////
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METHODDEF(void)
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stub(j_decompress_ptr)
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{
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}
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METHODDEF(boolean)
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fill_input_buffer(j_decompress_ptr)
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{
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return FALSE;
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}
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// emulating memory input stream
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METHODDEF(void)
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skip_input_data(j_decompress_ptr cinfo, long num_bytes)
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{
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JpegSource* source = (JpegSource*) cinfo->src;
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if( num_bytes > (long)source->pub.bytes_in_buffer )
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{
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// We need to skip more data than we have in the buffer.
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// This will force the JPEG library to suspend decoding.
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2010-11-26 00:55:46 +08:00
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source->skip = (int)(num_bytes - source->pub.bytes_in_buffer);
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2010-05-12 01:44:00 +08:00
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source->pub.next_input_byte += source->pub.bytes_in_buffer;
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source->pub.bytes_in_buffer = 0;
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}
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else
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{
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// Skip portion of the buffer
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source->pub.bytes_in_buffer -= num_bytes;
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source->pub.next_input_byte += num_bytes;
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source->skip = 0;
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}
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}
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2012-06-08 01:21:29 +08:00
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static void jpeg_buffer_src(j_decompress_ptr cinfo, JpegSource* source)
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2010-05-12 01:44:00 +08:00
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{
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cinfo->src = &source->pub;
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// Prepare for suspending reader
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source->pub.init_source = stub;
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source->pub.fill_input_buffer = fill_input_buffer;
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source->pub.skip_input_data = skip_input_data;
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source->pub.resync_to_restart = jpeg_resync_to_restart;
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source->pub.term_source = stub;
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source->pub.bytes_in_buffer = 0; // forces fill_input_buffer on first read
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source->skip = 0;
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}
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METHODDEF(void)
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error_exit( j_common_ptr cinfo )
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{
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JpegErrorMgr* err_mgr = (JpegErrorMgr*)(cinfo->err);
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/* Return control to the setjmp point */
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longjmp( err_mgr->setjmp_buffer, 1 );
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}
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/////////////////////// JpegDecoder ///////////////////
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JpegDecoder::JpegDecoder()
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{
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m_signature = "\xFF\xD8\xFF";
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m_state = 0;
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m_f = 0;
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m_buf_supported = true;
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}
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JpegDecoder::~JpegDecoder()
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{
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close();
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}
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void JpegDecoder::close()
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{
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if( m_state )
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{
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JpegState* state = (JpegState*)m_state;
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jpeg_destroy_decompress( &state->cinfo );
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delete state;
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m_state = 0;
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}
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if( m_f )
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{
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fclose( m_f );
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m_f = 0;
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}
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m_width = m_height = 0;
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m_type = -1;
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}
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ImageDecoder JpegDecoder::newDecoder() const
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{
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return new JpegDecoder;
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}
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bool JpegDecoder::readHeader()
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{
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bool result = false;
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close();
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JpegState* state = new JpegState;
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m_state = state;
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state->cinfo.err = jpeg_std_error(&state->jerr.pub);
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state->jerr.pub.error_exit = error_exit;
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if( setjmp( state->jerr.setjmp_buffer ) == 0 )
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{
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jpeg_create_decompress( &state->cinfo );
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if( !m_buf.empty() )
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{
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jpeg_buffer_src(&state->cinfo, &state->source);
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state->source.pub.next_input_byte = m_buf.data;
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state->source.pub.bytes_in_buffer = m_buf.cols*m_buf.rows*m_buf.elemSize();
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}
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else
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{
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m_f = fopen( m_filename.c_str(), "rb" );
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if( m_f )
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jpeg_stdio_src( &state->cinfo, m_f );
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}
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2012-12-06 23:42:17 +08:00
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if (state->cinfo.src != 0)
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{
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jpeg_read_header( &state->cinfo, TRUE );
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m_width = state->cinfo.image_width;
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m_height = state->cinfo.image_height;
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m_type = state->cinfo.num_components > 1 ? CV_8UC3 : CV_8UC1;
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result = true;
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}
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2010-05-12 01:44:00 +08:00
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}
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if( !result )
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close();
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return result;
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}
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/***************************************************************************
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* following code is for supporting MJPEG image files
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* based on a message of Laurent Pinchart on the video4linux mailing list
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***************************************************************************/
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/* JPEG DHT Segment for YCrCb omitted from MJPEG data */
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static
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unsigned char my_jpeg_odml_dht[0x1a4] = {
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0xff, 0xc4, 0x01, 0xa2,
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0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
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0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
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0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04,
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0x04, 0x00, 0x00, 0x01, 0x7d,
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0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
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0x13, 0x51, 0x61, 0x07,
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0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1,
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0x15, 0x52, 0xd1, 0xf0,
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0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a,
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0x25, 0x26, 0x27, 0x28,
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0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45,
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0x46, 0x47, 0x48, 0x49,
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0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65,
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0x66, 0x67, 0x68, 0x69,
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0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85,
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0x86, 0x87, 0x88, 0x89,
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0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3,
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0xa4, 0xa5, 0xa6, 0xa7,
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0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba,
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0xc2, 0xc3, 0xc4, 0xc5,
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0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
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0xd9, 0xda, 0xe1, 0xe2,
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4,
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0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa,
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0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04,
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0x04, 0x00, 0x01, 0x02, 0x77,
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0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41,
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0x51, 0x07, 0x61, 0x71,
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0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09,
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0x23, 0x33, 0x52, 0xf0,
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0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17,
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0x18, 0x19, 0x1a, 0x26,
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0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44,
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0x45, 0x46, 0x47, 0x48,
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0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
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0x65, 0x66, 0x67, 0x68,
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0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83,
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0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a,
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0xa2, 0xa3, 0xa4, 0xa5,
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0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8,
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0xb9, 0xba, 0xc2, 0xc3,
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0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
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0xd7, 0xd8, 0xd9, 0xda,
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0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4,
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0xf5, 0xf6, 0xf7, 0xf8,
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0xf9, 0xfa
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};
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/*
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* Parse the DHT table.
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* This code comes from jpeg6b (jdmarker.c).
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*/
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static
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int my_jpeg_load_dht (struct jpeg_decompress_struct *info, unsigned char *dht,
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|
|
|
JHUFF_TBL *ac_tables[], JHUFF_TBL *dc_tables[])
|
|
|
|
{
|
|
|
|
unsigned int length = (dht[2] << 8) + dht[3] - 2;
|
|
|
|
unsigned int pos = 4;
|
|
|
|
unsigned int count, i;
|
|
|
|
int index;
|
|
|
|
|
|
|
|
JHUFF_TBL **hufftbl;
|
|
|
|
unsigned char bits[17];
|
|
|
|
unsigned char huffval[256];
|
|
|
|
|
|
|
|
while (length > 16)
|
|
|
|
{
|
|
|
|
bits[0] = 0;
|
|
|
|
index = dht[pos++];
|
|
|
|
count = 0;
|
|
|
|
for (i = 1; i <= 16; ++i)
|
|
|
|
{
|
|
|
|
bits[i] = dht[pos++];
|
|
|
|
count += bits[i];
|
|
|
|
}
|
|
|
|
length -= 17;
|
|
|
|
|
|
|
|
if (count > 256 || count > length)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
for (i = 0; i < count; ++i)
|
|
|
|
huffval[i] = dht[pos++];
|
|
|
|
length -= count;
|
|
|
|
|
|
|
|
if (index & 0x10)
|
|
|
|
{
|
|
|
|
index -= 0x10;
|
|
|
|
hufftbl = &ac_tables[index];
|
|
|
|
}
|
|
|
|
else
|
|
|
|
hufftbl = &dc_tables[index];
|
|
|
|
|
|
|
|
if (index < 0 || index >= NUM_HUFF_TBLS)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (*hufftbl == NULL)
|
|
|
|
*hufftbl = jpeg_alloc_huff_table ((j_common_ptr)info);
|
|
|
|
if (*hufftbl == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
memcpy ((*hufftbl)->bits, bits, sizeof (*hufftbl)->bits);
|
|
|
|
memcpy ((*hufftbl)->huffval, huffval, sizeof (*hufftbl)->huffval);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (length != 0)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
|
|
* end of code for supportting MJPEG image files
|
|
|
|
* based on a message of Laurent Pinchart on the video4linux mailing list
|
|
|
|
***************************************************************************/
|
|
|
|
|
|
|
|
bool JpegDecoder::readData( Mat& img )
|
|
|
|
{
|
|
|
|
bool result = false;
|
2010-07-16 20:54:53 +08:00
|
|
|
int step = (int)img.step;
|
2010-05-12 01:44:00 +08:00
|
|
|
bool color = img.channels() > 1;
|
|
|
|
|
2012-08-13 23:24:31 +08:00
|
|
|
if( m_state && m_width && m_height )
|
2010-05-12 01:44:00 +08:00
|
|
|
{
|
2012-08-13 23:24:31 +08:00
|
|
|
jpeg_decompress_struct* cinfo = &((JpegState*)m_state)->cinfo;
|
|
|
|
JpegErrorMgr* jerr = &((JpegState*)m_state)->jerr;
|
2010-05-12 01:44:00 +08:00
|
|
|
JSAMPARRAY buffer = 0;
|
|
|
|
|
|
|
|
if( setjmp( jerr->setjmp_buffer ) == 0 )
|
|
|
|
{
|
|
|
|
/* check if this is a mjpeg image format */
|
|
|
|
if ( cinfo->ac_huff_tbl_ptrs[0] == NULL &&
|
|
|
|
cinfo->ac_huff_tbl_ptrs[1] == NULL &&
|
|
|
|
cinfo->dc_huff_tbl_ptrs[0] == NULL &&
|
|
|
|
cinfo->dc_huff_tbl_ptrs[1] == NULL )
|
|
|
|
{
|
|
|
|
/* yes, this is a mjpeg image format, so load the correct
|
|
|
|
huffman table */
|
|
|
|
my_jpeg_load_dht( cinfo,
|
|
|
|
my_jpeg_odml_dht,
|
|
|
|
cinfo->ac_huff_tbl_ptrs,
|
|
|
|
cinfo->dc_huff_tbl_ptrs );
|
|
|
|
}
|
|
|
|
|
|
|
|
if( color )
|
|
|
|
{
|
|
|
|
if( cinfo->num_components != 4 )
|
|
|
|
{
|
|
|
|
cinfo->out_color_space = JCS_RGB;
|
|
|
|
cinfo->out_color_components = 3;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
cinfo->out_color_space = JCS_CMYK;
|
|
|
|
cinfo->out_color_components = 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
if( cinfo->num_components != 4 )
|
|
|
|
{
|
|
|
|
cinfo->out_color_space = JCS_GRAYSCALE;
|
|
|
|
cinfo->out_color_components = 1;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
cinfo->out_color_space = JCS_CMYK;
|
|
|
|
cinfo->out_color_components = 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
jpeg_start_decompress( cinfo );
|
|
|
|
|
|
|
|
buffer = (*cinfo->mem->alloc_sarray)((j_common_ptr)cinfo,
|
|
|
|
JPOOL_IMAGE, m_width*4, 1 );
|
|
|
|
|
2012-06-20 20:27:02 +08:00
|
|
|
uchar* data = img.data;
|
2010-05-12 01:44:00 +08:00
|
|
|
for( ; m_height--; data += step )
|
|
|
|
{
|
|
|
|
jpeg_read_scanlines( cinfo, buffer, 1 );
|
|
|
|
if( color )
|
|
|
|
{
|
|
|
|
if( cinfo->out_color_components == 3 )
|
|
|
|
icvCvt_RGB2BGR_8u_C3R( buffer[0], 0, data, 0, cvSize(m_width,1) );
|
|
|
|
else
|
|
|
|
icvCvt_CMYK2BGR_8u_C4C3R( buffer[0], 0, data, 0, cvSize(m_width,1) );
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
if( cinfo->out_color_components == 1 )
|
|
|
|
memcpy( data, buffer[0], m_width );
|
|
|
|
else
|
|
|
|
icvCvt_CMYK2Gray_8u_C4C1R( buffer[0], 0, data, 0, cvSize(m_width,1) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
result = true;
|
|
|
|
jpeg_finish_decompress( cinfo );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
close();
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/////////////////////// JpegEncoder ///////////////////
|
|
|
|
|
|
|
|
struct JpegDestination
|
|
|
|
{
|
|
|
|
struct jpeg_destination_mgr pub;
|
|
|
|
vector<uchar> *buf, *dst;
|
|
|
|
};
|
|
|
|
|
|
|
|
METHODDEF(void)
|
|
|
|
stub(j_compress_ptr)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
METHODDEF(void)
|
|
|
|
term_destination (j_compress_ptr cinfo)
|
|
|
|
{
|
|
|
|
JpegDestination* dest = (JpegDestination*)cinfo->dest;
|
|
|
|
size_t sz = dest->dst->size(), bufsz = dest->buf->size() - dest->pub.free_in_buffer;
|
|
|
|
if( bufsz > 0 )
|
|
|
|
{
|
|
|
|
dest->dst->resize(sz + bufsz);
|
|
|
|
memcpy( &(*dest->dst)[0] + sz, &(*dest->buf)[0], bufsz);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
METHODDEF(boolean)
|
|
|
|
empty_output_buffer (j_compress_ptr cinfo)
|
|
|
|
{
|
|
|
|
JpegDestination* dest = (JpegDestination*)cinfo->dest;
|
|
|
|
size_t sz = dest->dst->size(), bufsz = dest->buf->size();
|
|
|
|
dest->dst->resize(sz + bufsz);
|
|
|
|
memcpy( &(*dest->dst)[0] + sz, &(*dest->buf)[0], bufsz);
|
|
|
|
|
|
|
|
dest->pub.next_output_byte = &(*dest->buf)[0];
|
|
|
|
dest->pub.free_in_buffer = bufsz;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
2012-06-08 01:21:29 +08:00
|
|
|
static void jpeg_buffer_dest(j_compress_ptr cinfo, JpegDestination* destination)
|
2010-05-12 01:44:00 +08:00
|
|
|
{
|
|
|
|
cinfo->dest = &destination->pub;
|
|
|
|
|
|
|
|
destination->pub.init_destination = stub;
|
|
|
|
destination->pub.empty_output_buffer = empty_output_buffer;
|
|
|
|
destination->pub.term_destination = term_destination;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
JpegEncoder::JpegEncoder()
|
|
|
|
{
|
|
|
|
m_description = "JPEG files (*.jpeg;*.jpg;*.jpe)";
|
|
|
|
m_buf_supported = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
JpegEncoder::~JpegEncoder()
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
ImageEncoder JpegEncoder::newEncoder() const
|
|
|
|
{
|
|
|
|
return new JpegEncoder;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool JpegEncoder::write( const Mat& img, const vector<int>& params )
|
|
|
|
{
|
2012-06-20 20:27:02 +08:00
|
|
|
struct fileWrapper
|
2010-05-12 01:44:00 +08:00
|
|
|
{
|
2012-06-20 20:27:02 +08:00
|
|
|
FILE* f;
|
2010-05-12 01:44:00 +08:00
|
|
|
|
2012-06-20 20:27:02 +08:00
|
|
|
fileWrapper() : f(0) {}
|
|
|
|
~fileWrapper() { if(f) fclose(f); }
|
|
|
|
};
|
2010-05-12 01:44:00 +08:00
|
|
|
bool result = false;
|
2012-06-20 20:27:02 +08:00
|
|
|
fileWrapper fw;
|
2010-05-12 01:44:00 +08:00
|
|
|
int width = img.cols, height = img.rows;
|
|
|
|
|
|
|
|
vector<uchar> out_buf(1 << 12);
|
|
|
|
AutoBuffer<uchar> _buffer;
|
|
|
|
uchar* buffer;
|
|
|
|
|
|
|
|
struct jpeg_compress_struct cinfo;
|
|
|
|
JpegErrorMgr jerr;
|
|
|
|
JpegDestination dest;
|
|
|
|
|
|
|
|
jpeg_create_compress(&cinfo);
|
|
|
|
cinfo.err = jpeg_std_error(&jerr.pub);
|
|
|
|
jerr.pub.error_exit = error_exit;
|
|
|
|
|
|
|
|
if( !m_buf )
|
|
|
|
{
|
2012-06-20 20:27:02 +08:00
|
|
|
fw.f = fopen( m_filename.c_str(), "wb" );
|
|
|
|
if( !fw.f )
|
2010-05-12 01:44:00 +08:00
|
|
|
goto _exit_;
|
2012-06-20 20:27:02 +08:00
|
|
|
jpeg_stdio_dest( &cinfo, fw.f );
|
2010-05-12 01:44:00 +08:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
dest.dst = m_buf;
|
|
|
|
dest.buf = &out_buf;
|
|
|
|
|
|
|
|
jpeg_buffer_dest( &cinfo, &dest );
|
|
|
|
|
|
|
|
dest.pub.next_output_byte = &out_buf[0];
|
|
|
|
dest.pub.free_in_buffer = out_buf.size();
|
|
|
|
}
|
|
|
|
|
|
|
|
if( setjmp( jerr.setjmp_buffer ) == 0 )
|
|
|
|
{
|
|
|
|
cinfo.image_width = width;
|
|
|
|
cinfo.image_height = height;
|
2012-06-21 01:57:26 +08:00
|
|
|
|
|
|
|
int _channels = img.channels();
|
|
|
|
int channels = _channels > 1 ? 3 : 1;
|
2010-05-12 01:44:00 +08:00
|
|
|
cinfo.input_components = channels;
|
|
|
|
cinfo.in_color_space = channels > 1 ? JCS_RGB : JCS_GRAYSCALE;
|
|
|
|
|
2012-06-20 20:27:02 +08:00
|
|
|
int quality = 95;
|
|
|
|
|
|
|
|
for( size_t i = 0; i < params.size(); i += 2 )
|
|
|
|
{
|
|
|
|
if( params[i] == CV_IMWRITE_JPEG_QUALITY )
|
|
|
|
{
|
|
|
|
quality = params[i+1];
|
|
|
|
quality = MIN(MAX(quality, 0), 100);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-12 01:44:00 +08:00
|
|
|
jpeg_set_defaults( &cinfo );
|
|
|
|
jpeg_set_quality( &cinfo, quality,
|
|
|
|
TRUE /* limit to baseline-JPEG values */ );
|
|
|
|
jpeg_start_compress( &cinfo, TRUE );
|
|
|
|
|
|
|
|
if( channels > 1 )
|
|
|
|
_buffer.allocate(width*channels);
|
|
|
|
buffer = _buffer;
|
|
|
|
|
|
|
|
for( int y = 0; y < height; y++ )
|
|
|
|
{
|
|
|
|
uchar *data = img.data + img.step*y, *ptr = data;
|
|
|
|
|
|
|
|
if( _channels == 3 )
|
|
|
|
{
|
|
|
|
icvCvt_BGR2RGB_8u_C3R( data, 0, buffer, 0, cvSize(width,1) );
|
|
|
|
ptr = buffer;
|
|
|
|
}
|
|
|
|
else if( _channels == 4 )
|
|
|
|
{
|
|
|
|
icvCvt_BGRA2BGR_8u_C4C3R( data, 0, buffer, 0, cvSize(width,1), 2 );
|
|
|
|
ptr = buffer;
|
|
|
|
}
|
|
|
|
|
|
|
|
jpeg_write_scanlines( &cinfo, &ptr, 1 );
|
|
|
|
}
|
|
|
|
|
|
|
|
jpeg_finish_compress( &cinfo );
|
|
|
|
result = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
_exit_:
|
|
|
|
jpeg_destroy_compress( &cinfo );
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* End of file. */
|