Aegisub/prs/prs_image.cpp

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2006-03-30 05:53:29 +02:00
// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// 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.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include "png_wrap.h"
#include "prs_image.h"
#include "prs_video_frame.h"
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///////////////
// Constructor
PRSImage::PRSImage() {
id = -1;
imageType = NULL_IMG;
dataLen = 0;
data = 0;
}
//////////////
// Destructor
PRSImage::~PRSImage() {
if (data) {
delete [] data;
data = 0;
dataLen = 0;
}
}
//////////////
// Write data
void PRSImage::WriteData(std::vector<char> &vec) {
// Set length
unsigned __int32 size = 4 + 4 + 4 + dataLen;
vec.resize(size+8);
size_t pos = 0;
// Write block identifier
char str[] = "IMG";
memcpy(&vec[pos],str,4);
pos += 4;
// Write block length
memcpy(&vec[pos],&size,4);
pos += 4;
// Write image identifier
memcpy(&vec[pos],&id,4);
pos += 4;
// Write image format
memcpy(&vec[pos],&imageType,4);
pos += 4;
// Write data length
memcpy(&vec[pos],&dataLen,4);
pos += 4;
// Write data
memcpy(&vec[pos],data,dataLen);
pos += dataLen;
}
/////////////
// Read data
void PRSImage::ReadData(std::vector<char> &vec) {
// Set length
size_t size = vec.size();
size_t pos = 0;
// Read image identifier
memcpy(&id,&vec[pos],4);
pos += 4;
// Read image format
memcpy(&imageType,&vec[pos],4);
pos += 4;
// Read data length
memcpy(&dataLen,&vec[pos],4);
pos += 4;
// Read data
data = new char[dataLen];
memcpy(data,&vec[pos],dataLen);
pos += dataLen;
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}
////////////////
// Decode frame
PRSVideoFrame *PRSImage::GetDecodedFrame() {
// Create frame
PRSVideoFrame *frame = new PRSVideoFrame;
try {
PNGWrapper png;
png.SetData(data);
png.Read(frame);
}
// Handle errors
catch (...) {
delete frame;
return NULL;
}
// Return frame
return frame;
}