SwsContext.java

/*
 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
 * Copyright (c) 2011 Michael Zucchi
 *
 * This file is part of jjmpeg, a java binding to ffmpeg's libraries.
 *
 * jjmpeg is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * jjmpeg 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with jjmpeg.  If not, see <http://www.gnu.org/licenses/>.
 */
package au.notzed.jjmpeg;

import java.nio.ByteBuffer;

/**
 * Used to convert between formats and optionally scale at the same time.
 *
 * @author notzed
 */
public class SwsContext extends SwsContextAbstract {

	final int dstW;
	final int dstH;
	final PixelFormat dstFormat;
	public static final int SWS_FAST_BILINEAR = 1;
	public static final int SWS_BILINEAR = 2;
	public static final int SWS_BICUBIC = 4;
	public static final int SWS_X = 8;
	public static final int SWS_POINT = 0x10;
	public static final int SWS_AREA = 0x20;
	public static final int SWS_BICUBLIN = 0x40;
	public static final int SWS_GAUSS = 0x80;
	public static final int SWS_SINC = 0x100;
	public static final int SWS_LANCZOS = 0x200;
	public static final int SWS_SPLINE = 0x400;

	protected SwsContext(ByteBuffer p, int dstW, int dstH, PixelFormat dstFormat) {
		setNative(new SwsContextNative(this, p));

		this.dstW = dstW;
		this.dstH = dstH;
		this.dstFormat = dstFormat;
	}

	static SwsContext create(ByteBuffer p, int dstW, int dstH, PixelFormat dstFormat) {
		return new SwsContext(p, dstW, dstH, dstFormat);
	}

	static public SwsContext create(int srcW, int srcH, PixelFormat srcFormat, int dstW, int dstH, PixelFormat dstFormat, int flags) {
		//return getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, null, null, null);
		return SwsContext.create(SwsContextNativeAbstract.getContext(srcW, srcH, srcFormat.toC(), dstW, dstH, dstFormat.toC(), flags, null, null, null), dstW, dstH, dstFormat);
	}

	public int scale(AVFrame src, int srcSliceY, int srcSliceH, AVFrame dst) {
		return SwsContextNative.scale(n.p, src.n.p, srcSliceY, srcSliceH, dst.n.p);
	}

	public int scale(AVFrame src, int srcSliceY, int srcSliceH, int[] dst) {
		return SwsContextNative.scaleIntArray(n.p, src.n.p, srcSliceY, srcSliceH, dst, dstFormat.toC(), dstW, dstH);
	}

	public int scale(AVFrame src, int srcSliceY, int srcSliceH, byte[] dst) {
		return SwsContextNative.scaleByteArray(n.p, src.n.p, srcSliceY, srcSliceH, dst, dstFormat.toC(), dstW, dstH);
	}
}

class SwsContextNative extends SwsContextNativeAbstract {

	SwsContextNative(AVObject o, ByteBuffer p) {
		super(o, p);
	}

	static native int scale(ByteBuffer p, ByteBuffer srcFrame, int srcSliceY, int srcSliceH, ByteBuffer dstFrame);

	static native int scaleIntArray(ByteBuffer p, ByteBuffer srcFrame, int srcSliceY, int srcSliceH, int[] dst, int pixfmt, int width, int height);

	static native int scaleByteArray(ByteBuffer p, ByteBuffer srcFrame, int srcSliceY, int srcSliceH, byte[] dst, int pixfmt, int width, int height);

	@Override
	public void dispose() {
		if (p != null) {
			freeContext(p);
			super.dispose();
		}
	}
}