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Fix an issue that prevented tjEncodeYUV3() and TJCompressor.encodeYUV() from working properly if the source image was very tiny. Basically, jpeg_start_compress() was attempting to write the JPEG headers, which was overrunning the YUV buffer. This patch removes the call to jpeg_start_compress() in tjEncodeYUV3() and replaces it with calls to the individual routines that are necessary to initialize the color converter and downsampler. TJUnitTest has also been modified to test for this condition (the buffer size regression test now works in YUV mode.)

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DRC
2014-02-11 09:45:18 +00:00
parent d3d06f42c1
commit 040c688263
4 changed files with 76 additions and 28 deletions
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28
java/TJUnitTest.java
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@@ -1,5 +1,5 @@
/*
* Copyright (C)2011-2013 D. R. Commander. All Rights Reserved.
* Copyright (C)2011-2014 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:
@@ -945,7 +945,7 @@ public class TJUnitTest {
private static void bufSizeTest() throws Exception {
int w, h, i, subsamp;
byte[] srcBuf, jpegBuf;
byte[] srcBuf, dstBuf;
TJCompressor tjc = null;
Random r = new Random();
@@ -959,22 +959,35 @@ public class TJUnitTest {
if (h % 100 == 0)
System.out.format("%04d x %04d\b\b\b\b\b\b\b\b\b\b\b", w, h);
srcBuf = new byte[w * h * 4];
jpegBuf = new byte[TJ.bufSize(w, h, subsamp)];
if (yuv == YUVENCODE)
dstBuf = new byte[TJ.bufSizeYUV(w, pad, h, subsamp)];
else
dstBuf = new byte[TJ.bufSize(w, h, subsamp)];
for (i = 0; i < w * h * 4; i++) {
srcBuf[i] = (byte)(r.nextInt(2) * 255);
}
tjc.setSourceImage(srcBuf, w, 0, h, TJ.PF_BGRX);
tjc.setSubsamp(subsamp);
tjc.setJPEGQuality(100);
tjc.compress(jpegBuf, 0);
tjc.setYUVPad(pad);
if (yuv == YUVENCODE)
tjc.encodeYUV(dstBuf, 0);
else
tjc.compress(dstBuf, 0);
srcBuf = new byte[h * w * 4];
jpegBuf = new byte[TJ.bufSize(h, w, subsamp)];
if (yuv == YUVENCODE)
dstBuf = new byte[TJ.bufSizeYUV(h, pad, w, subsamp)];
else
dstBuf = new byte[TJ.bufSize(h, w, subsamp)];
for (i = 0; i < h * w * 4; i++) {
srcBuf[i] = (byte)(r.nextInt(2) * 255);
}
tjc.setSourceImage(srcBuf, h, 0, w, TJ.PF_BGRX);
tjc.compress(jpegBuf, 0);
if (yuv == YUVENCODE)
tjc.encodeYUV(dstBuf, 0);
else
tjc.compress(dstBuf, 0);
}
}
}
@@ -1033,9 +1046,10 @@ public class TJUnitTest {
_4byteFormats[4] = -1;
doTest(35, 39, bi ? _4byteFormatsBI : _4byteFormats, TJ.SAMP_GRAY,
testName);
if (!doyuv && !bi)
if (!bi)
bufSizeTest();
if (doyuv && !bi) {
System.out.print("\n--------------------\n\n");
yuv = YUVDECODE;
doTest(48, 48, onlyRGB, TJ.SAMP_444, "javatest_yuv0");
doTest(35, 39, onlyRGB, TJ.SAMP_444, "javatest_yuv1");