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/* Copyright (C) 2000-2003 Constantin Kaplinsky. All Rights Reserved.
* Copyright (C) 2004-2005 Cendio AB. All rights reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <rfb/CMsgReader.h>
#include <rfb/CMsgHandler.h>
#include <rfb/TightDecoder.h>
#include <stdio.h> /* jpeglib.h needs FILE */
extern "C" {
#include <jpeglib.h>
}
using namespace rfb;
#define TIGHT_MAX_WIDTH 2048
static void JpegSetSrcManager(j_decompress_ptr cinfo, char *compressedData,
int compressedLen);
static bool jpegError;
#define EXTRA_ARGS CMsgHandler* handler
#define FILL_RECT(r, p) handler->fillRect(r, p)
#define IMAGE_RECT(r, p) handler->imageRect(r, p)
#define BPP 8
#include <rfb/tightDecode.h>
#undef BPP
#define BPP 16
#include <rfb/tightDecode.h>
#undef BPP
#define BPP 32
#include <rfb/tightDecode.h>
#undef BPP
Decoder* TightDecoder::create(CMsgReader* reader)
{
return new TightDecoder(reader);
}
TightDecoder::TightDecoder(CMsgReader* reader_) : reader(reader_)
{
}
TightDecoder::~TightDecoder()
{
}
void TightDecoder::readRect(const Rect& r, CMsgHandler* handler)
{
rdr::InStream* is = reader->getInStream();
/* Uncompressed RGB24 JPEG data, before translated, can be up to 3
times larger, if VNC bpp is 8. */
rdr::U8* buf = reader->getImageBuf(r.area()*3);
switch (reader->bpp()) {
case 8:
tightDecode8 (r, is, zis, (rdr::U8*) buf, handler); break;
case 16:
tightDecode16(r, is, zis, (rdr::U16*)buf, handler); break;
case 32:
tightDecode32(r, is, zis, (rdr::U32*)buf, handler); break;
}
}
//
// A "Source manager" for the JPEG library.
//
static struct jpeg_source_mgr jpegSrcManager;
static JOCTET *jpegBufferPtr;
static size_t jpegBufferLen;
static void JpegInitSource(j_decompress_ptr cinfo);
static boolean JpegFillInputBuffer(j_decompress_ptr cinfo);
static void JpegSkipInputData(j_decompress_ptr cinfo, long num_bytes);
static void JpegTermSource(j_decompress_ptr cinfo);
static void
JpegInitSource(j_decompress_ptr cinfo)
{
jpegError = false;
}
static boolean
JpegFillInputBuffer(j_decompress_ptr cinfo)
{
jpegError = true;
jpegSrcManager.bytes_in_buffer = jpegBufferLen;
jpegSrcManager.next_input_byte = (JOCTET *)jpegBufferPtr;
return TRUE;
}
static void
JpegSkipInputData(j_decompress_ptr cinfo, long num_bytes)
{
if (num_bytes < 0 || (size_t)num_bytes > jpegSrcManager.bytes_in_buffer) {
jpegError = true;
jpegSrcManager.bytes_in_buffer = jpegBufferLen;
jpegSrcManager.next_input_byte = (JOCTET *)jpegBufferPtr;
} else {
jpegSrcManager.next_input_byte += (size_t) num_bytes;
jpegSrcManager.bytes_in_buffer -= (size_t) num_bytes;
}
}
static void
JpegTermSource(j_decompress_ptr cinfo)
{
/* No work necessary here. */
}
static void
JpegSetSrcManager(j_decompress_ptr cinfo, char *compressedData, int compressedLen)
{
jpegBufferPtr = (JOCTET *)compressedData;
jpegBufferLen = (size_t)compressedLen;
jpegSrcManager.init_source = JpegInitSource;
jpegSrcManager.fill_input_buffer = JpegFillInputBuffer;
jpegSrcManager.skip_input_data = JpegSkipInputData;
jpegSrcManager.resync_to_restart = jpeg_resync_to_restart;
jpegSrcManager.term_source = JpegTermSource;
jpegSrcManager.next_input_byte = jpegBufferPtr;
jpegSrcManager.bytes_in_buffer = jpegBufferLen;
cinfo->src = &jpegSrcManager;
}
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