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Added flags to the TurboJPEG API that allow the caller to force the use of either the fast or the accurate DCT/IDCT algorithms in the underlying codec.

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@849 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2012-06-29 23:14:48 +00:00
parent 112a0bb968
commit fd3aba3590
38 changed files with 415 additions and 174 deletions
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32
java/TJExample.java
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@@ -1,5 +1,5 @@
/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
* Copyright (C)2011-2012 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -80,7 +80,13 @@ public class TJExample implements TJCustomFilter {
System.out.println(" compressed using no subsampling or grayscale, or 16x8 for 4:2:2 or 16x16");
System.out.println(" for 4:2:0.)\n");
System.out.println("-display = Display output image (Output file need not be specified in this");
System.out.println(" case.)\n");
System.out.println(" case.)");
System.out.println("-fastupsample = Use fast, inaccurate upsampling code to perform 4:2:2 and 4:2:0");
System.out.println(" YUV decoding");
System.out.println("-fastdct = Use the fastest DCT/IDCT algorithms available in the underlying");
System.out.println(" codec");
System.out.println("-accuratedct = Use the most accurate DCT/IDCT algorithms available in the");
System.out.println(" underlying codec");
System.exit(1);
}
@@ -92,6 +98,7 @@ public class TJExample implements TJCustomFilter {
BufferedImage img = null; byte[] bmpBuf = null;
TJTransform xform = new TJTransform();
int flags = 0;
try {
@@ -187,6 +194,18 @@ public class TJExample implements TJCustomFilter {
}
if(argv[i].substring(0, 2).equalsIgnoreCase("-d"))
display = true;
if(argv[i].equalsIgnoreCase("-fastupsample")) {
System.out.println("Using fast upsampling code");
flags |= TJ.FLAG_FASTUPSAMPLE;
}
if(argv[i].equalsIgnoreCase("-fastdct")) {
System.out.println("Using fastest DCT/IDCT algorithm");
flags |= TJ.FLAG_FASTDCT;
}
if(argv[i].equalsIgnoreCase("-accuratedct")) {
System.out.println("Using most accurate DCT/IDCT algorithm");
flags |= TJ.FLAG_ACCURATEDCT;
}
}
}
String[] inFileTokens = argv[0].split("\\.");
@@ -247,8 +266,9 @@ public class TJExample implements TJCustomFilter {
height = scaleFactor.getScaled(height);
if(!outFormat.equalsIgnoreCase("jpg"))
img = tjd.decompress(width, height, BufferedImage.TYPE_INT_RGB, 0);
else bmpBuf = tjd.decompress(width, 0, height, TJ.PF_BGRX, 0);
img = tjd.decompress(width, height, BufferedImage.TYPE_INT_RGB,
flags);
else bmpBuf = tjd.decompress(width, 0, height, TJ.PF_BGRX, flags);
tjd.close();
}
else {
@@ -282,10 +302,10 @@ public class TJExample implements TJCustomFilter {
tjc.setSubsamp(outSubsamp);
tjc.setJPEGQuality(outQual);
if(img != null)
jpegBuf = tjc.compress(img, 0);
jpegBuf = tjc.compress(img, flags);
else {
tjc.setSourceImage(bmpBuf, width, 0, height, TJ.PF_BGRX);
jpegBuf = tjc.compress(0);
jpegBuf = tjc.compress(flags);
}
jpegSize = tjc.getCompressedSize();
tjc.close();