ryan/mozjpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add 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.

Browse Source
This commit is contained in:
DRC
2012-06-29 23:46:38 +00:00
parent 7b8366223a
commit 019d51d4f1
38 changed files with 426 additions and 185 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
java/TJExample.java
View File

@@ -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:
@@ -81,6 +81,12 @@ public class TJExample implements TJCustomFilter {
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("-fastupsample = Use the fastest chrominance upsampling algorithm available in");
System.out.println(" the underlying codec\n");
System.out.println("-fastdct = Use the fastest DCT/IDCT algorithms available in the underlying");
System.out.println(" codec\n");
System.out.println("-accuratedct = Use the most accurate DCT/IDCT algorithms available in the");
System.out.println(" underlying codec\n");
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();