/*
 * Copyright (c) 2007, Digital Signal Processing Laboratory, Università degli studi di Perugia (UPG), Italy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
/////////////////////////////////////////////////////////////////////////////
// Name:        imagj2k.cpp
// Purpose:     wxImage JPEG 2000 codestream handler
// Author:      Giuseppe Baruffa - based on imagjpeg.cpp, Vaclav Slavik
// RCS-ID:      $Id: imagj2k.cpp,v 0.00 2007/02/08 23:59:00 MW Exp $
// Copyright:   (c) Giuseppe Baruffa
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_IMAGE && wxUSE_LIBOPENJPEG

#include "imagj2k.h"

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/app.h"
    #include "wx/intl.h"
    #include "wx/bitmap.h"
    #include "wx/module.h"
#endif

#include "wx/filefn.h"
#include "wx/wfstream.h"

// ----------------------------------------------------------------------------
// types
// ----------------------------------------------------------------------------


//-----------------------------------------------------------------------------
// wxJ2KHandler
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxJ2KHandler,wxImageHandler)

#if wxUSE_STREAMS

//------------- JPEG 2000 Data Source Manager

#define J2K_CFMT 0
#define JP2_CFMT 1
#define JPT_CFMT 2
#define MJ2_CFMT 3
#define PXM_DFMT 0
#define PGX_DFMT 1
#define BMP_DFMT 2
#define YUV_DFMT 3

#define MAX_MESSAGE_LEN 200

/* sample error callback expecting a FILE* client object */
void j2k_error_callback(const char *msg, void *client_data) {
	int message_len = strlen(msg) - 1;
	if (msg[message_len] != '\n')
		message_len = MAX_MESSAGE_LEN;
    wxMutexGuiEnter();
	wxLogMessage(wxT("[ERROR] %.*s"), message_len, msg);
    wxMutexGuiLeave();
}
/* sample warning callback expecting a FILE* client object */
void j2k_warning_callback(const char *msg, void *client_data) {
	int message_len = strlen(msg) - 1;
	if (msg[message_len] != '\n')
		message_len = MAX_MESSAGE_LEN;
    wxMutexGuiEnter();
	wxLogMessage(wxT("[WARNING] %.*s"), message_len, msg);
    wxMutexGuiLeave();
}
/* sample debug callback expecting no client object */
void j2k_info_callback(const char *msg, void *client_data) {
	int message_len = strlen(msg) - 1;
	if (msg[message_len] != '\n')
		message_len = MAX_MESSAGE_LEN;
    wxMutexGuiEnter();
	wxLogMessage(wxT("[INFO] %.*s"), message_len, msg);
    wxMutexGuiLeave();
}

// load the j2k codestream
bool wxJ2KHandler::LoadFile(wxImage *image, wxInputStream& stream, bool verbose, int index)
{
	opj_dparameters_t parameters;	/* decompression parameters */
	opj_event_mgr_t event_mgr;		/* event manager */
	opj_image_t *opjimage = NULL;
	unsigned char *src = NULL;
    unsigned char *ptr;
	int file_length;
	int shiftbpp;
	int c, tempcomps;

	// destroy the image
    image->Destroy();

	/* handle to a decompressor */
	opj_dinfo_t* dinfo = NULL;	
	opj_cio_t *cio = NULL;


	/* configure the event callbacks (not required) */
	memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
	event_mgr.error_handler = j2k_error_callback;
	event_mgr.warning_handler = j2k_warning_callback;
	event_mgr.info_handler = j2k_info_callback;

	/* set decoding parameters to default values */
	opj_set_default_decoder_parameters(&parameters);

	/* prepare parameters */
	strncpy(parameters.infile, "", sizeof(parameters.infile)-1);
	strncpy(parameters.outfile, "", sizeof(parameters.outfile)-1);
	parameters.decod_format = J2K_CFMT;
	parameters.cod_format = BMP_DFMT;
	if (m_reducefactor)
		parameters.cp_reduce = m_reducefactor;
	if (m_qualitylayers)
		parameters.cp_layer = m_qualitylayers;
	/*if (n_components)
		parameters. = n_components;*/

	/* JPWL only */
#ifdef USE_JPWL
	parameters.jpwl_exp_comps = m_expcomps;
	parameters.jpwl_max_tiles = m_maxtiles;
	parameters.jpwl_correct = m_enablejpwl;
#endif /* USE_JPWL */

	/* get a decoder handle */
	dinfo = opj_create_decompress(CODEC_J2K);

	/* find length of the stream */
	stream.SeekI(0, wxFromEnd);
	file_length = (int) stream.TellI();

	/* get data */
	stream.SeekI(0, wxFromStart);
    src = (unsigned char *) malloc(file_length);
	stream.Read(src, file_length);

	/* catch events using our callbacks and give a local context */
	opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);

	/* setup the decoder decoding parameters using user parameters */
	opj_setup_decoder(dinfo, &parameters);

	/* open a byte stream */
	cio = opj_cio_open((opj_common_ptr)dinfo, src, file_length);

	/* decode the stream and fill the image structure */
	opjimage = opj_decode(dinfo, cio);
	if (!opjimage) {
		wxMutexGuiEnter();
		wxLogError(wxT("J2K: failed to decode image!"));
		wxMutexGuiLeave();
		opj_destroy_decompress(dinfo);
		opj_cio_close(cio);
		opj_image_destroy(opjimage);
		free(src);
		return false;
	}

	/* close the byte stream */
	opj_cio_close(cio);

	// check image components

	// check image depth (only on the first one, for now)
	shiftbpp = opjimage->comps[0].prec - 8;

	// prepare image size
    image->Create(opjimage->comps[0].w, opjimage->comps[0].h, true );

	// access image raw data
    image->SetMask( false );
    ptr = image->GetData();

	// workaround for components different from 1 or 3
	if ((opjimage->numcomps != 1) && (opjimage->numcomps != 3)) {
		wxMutexGuiEnter();
		wxLogMessage(wxT("J2K: weird number of components"));
		tempcomps = 1;
		wxMutexGuiLeave();
	} else
		tempcomps = opjimage->numcomps;

	// workaround for subsampled components
	for (c = 1; c < tempcomps; c++) {
		if ((opjimage->comps[c].w != opjimage->comps[c - 1].w) || (opjimage->comps[c].h != opjimage->comps[c - 1].h)) {
			tempcomps = 1;
			break;
		}
	}

	// workaround for different precision components
	for (c = 1; c < tempcomps; c++) {
		if (opjimage->comps[c].bpp != opjimage->comps[c - 1].bpp) {
			tempcomps = 1;
			break;
		}
	}


	// RGB color picture
	if (tempcomps == 3) {
		int row, col;
		int *r = opjimage->comps[0].data;
		int *g = opjimage->comps[1].data;
		int *b = opjimage->comps[2].data;
		if (shiftbpp > 0) {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {
					
					*(ptr++) = (*(r++)) >> shiftbpp;
					*(ptr++) = (*(g++)) >> shiftbpp;
					*(ptr++) = (*(b++)) >> shiftbpp;

				}
			}

		} else if (shiftbpp < 0) {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {
					
					*(ptr++) = (*(r++)) << -shiftbpp;
					*(ptr++) = (*(g++)) << -shiftbpp;
					*(ptr++) = (*(b++)) << -shiftbpp;

				}
			}
			
		} else {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {

					*(ptr++) = *(r++);
					*(ptr++) = *(g++);
					*(ptr++) = *(b++);
				
				}
			}
		}
	}

	// B/W picture
	if (tempcomps == 1) {
		int row, col;
		int *y = opjimage->comps[0].data;
		if (shiftbpp > 0) {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {
					
					*(ptr++) = (*(y)) >> shiftbpp;
					*(ptr++) = (*(y)) >> shiftbpp;
					*(ptr++) = (*(y++)) >> shiftbpp;

				}
			}
		} else if (shiftbpp < 0) {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {
					
					*(ptr++) = (*(y)) << -shiftbpp;
					*(ptr++) = (*(y)) << -shiftbpp;
					*(ptr++) = (*(y++)) << -shiftbpp;

				}
			}
		} else {
			for (row = 0; row < opjimage->comps[0].h; row++) {
				for (col = 0; col < opjimage->comps[0].w; col++) {
					
					*(ptr++) = *(y);
					*(ptr++) = *(y);
					*(ptr++) = *(y++);

				}
			}
		}
	}

    wxMutexGuiEnter();
    wxLogMessage(wxT("J2K: image loaded."));
    wxMutexGuiLeave();

	/* close openjpeg structs */
	opj_destroy_decompress(dinfo);
	opj_image_destroy(opjimage);
	free(src);

	if (!image->Ok())
		return false;
	else
		return true;

}

// save the j2k codestream
bool wxJ2KHandler::SaveFile( wxImage *image, wxOutputStream& stream, bool verbose )
{
    wxLogError(wxT("J2K: Couldn't save image -> not implemented."));
    return false;
}

#ifdef __VISUALC__
    #pragma warning(default:4611)
#endif /* VC++ */

// recognize the 0xFF4F JPEG 2000 SOC marker
bool wxJ2KHandler::DoCanRead( wxInputStream& stream )
{
    unsigned char hdr[2];

    if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
        return false;

    return hdr[0] == 0xFF && hdr[1] == 0x4F;
}

#endif   // wxUSE_STREAMS

#endif   // wxUSE_LIBOPENJPEG