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/* Copyright (C) 2011-2013 Doubango Telecom <http://www.doubango.org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO 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 DOUBANGO.
*/
/*
* Copyright (c) Microsoft Corporation. All rights reserved.
*/
#ifndef PLUGIN_DSHOW_RESIZER_H
#define PLUGIN_DSHOW_RESIZER_H
#include "plugin_dshow_config.h"
/*
* StretchC.C
*
* StretchBlt for DIBs
*
* C version of stretch.asm: StretchDIB optimised for AVI.
*
* NOTES
* - does not handle mirroring in x or y
* - does not handle pixel translation
* - will not work in place.
*/
/* Outline:
*
* we select a y-stretching function depending on the ratio (eg 1:N or N:1).
* it copies scanlines from source to destination, duplicating or omitting
* scanlines as necessary to fit the destination. It copies each scanline
* via the X_FUNC function we passed as an argument: this copies one scanline
* duplicating or omitting pixels to fit the destination: we select an X_FUNC
* depending on the bit-depth as well as the x-stretching ratio.
*
* both x and y stretching functions use the following basic model for deciding
* when to insert/omit elements:
*
* delta = <larger extent> -1;
*
* for (number of destination elements) {
*
* copy one element
* advance pointer to larger region
* delta -= <smaller extent>
* if (delta < 0) {
* delta += <larger extent>;
* advance pointer to smaller region
* }
* }
*/
#include <streams.h>
void ResizeRGB( BITMAPINFOHEADER *pbiIn, //Src's BitMapInFoHeader
const unsigned char * dibBits, //Src bits
BITMAPINFOHEADER *pbiOut,
unsigned char *pFrame, //Dst bits
int iNewWidth, //new W in pixel
int iNewHeight); //new H in pixel
#endif //RESIZER_H
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