diff options
author | dcommander <dcommander@632fc199-4ca6-4c93-a231-07263d6284db> | 2011-02-22 10:27:31 +0000 |
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committer | dcommander <dcommander@632fc199-4ca6-4c93-a231-07263d6284db> | 2011-02-22 10:27:31 +0000 |
commit | 22d668efbdb4542fd05e6a10d261c466ca3d7b01 (patch) | |
tree | 547bc6d871ab73fc5c56e0d7af3555f8746263c6 /java/org/libjpegturbo/turbojpeg/TJDecompressor.java | |
parent | 2ee47b624713977994aa2a1eac5273af0c286079 (diff) |
Streamline Java wrapper
git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@424 632fc199-4ca6-4c93-a231-07263d6284db
Diffstat (limited to 'java/org/libjpegturbo/turbojpeg/TJDecompressor.java')
-rw-r--r-- | java/org/libjpegturbo/turbojpeg/TJDecompressor.java | 87 |
1 files changed, 84 insertions, 3 deletions
diff --git a/java/org/libjpegturbo/turbojpeg/TJDecompressor.java b/java/org/libjpegturbo/turbojpeg/TJDecompressor.java index 6408d58..446eb3c 100644 --- a/java/org/libjpegturbo/turbojpeg/TJDecompressor.java +++ b/java/org/libjpegturbo/turbojpeg/TJDecompressor.java @@ -34,6 +34,75 @@ public class TJDecompressor { init(); } + public TJDecompressor(byte [] buf) throws Exception { + setJPEGBuffer(buf); + } + + public void setJPEGBuffer(byte [] buf) throws Exception { + if(handle == 0) init(); + if(buf == null) throw new Exception("Invalid argument in setJPEGBuffer()"); + jpegBuf = buf; + decompressHeader(); + } + + public int getWidth() throws Exception { + if(header.width < 1) throw new Exception("JPEG buffer not initialized"); + return header.width; + } + + public int getHeight() throws Exception { + if(header.height < 1) throw new Exception("JPEG buffer not initialized"); + return header.height; + } + + public int getSubsamp() throws Exception { + if(header.subsamp < 0) throw new Exception("JPEG buffer not initialized"); + return header.subsamp; + } + + public int getScaledWidth(int desired_width, int desired_height) + throws Exception { + if(header.width < 1 || header.height < 1) + throw new Exception("JPEG buffer not initialized"); + return getScaledWidth(header.width, header.height, desired_width, + desired_height); + } + + public int getScaledHeight(int output_width, int output_height) + throws Exception { + if(header.width < 1 || header.height < 1) + throw new Exception("JPEG buffer not initialized"); + return getScaledHeight(header.width, header.height, output_width, + output_height); + } + + public void decompress(byte [] dstBuf, int width, int pitch, + int height, int pixelFormat, int flags) throws Exception { + if(jpegBuf == null) throw new Exception("JPEG buffer not initialized"); + decompress(jpegBuf, jpegBuf.length, dstBuf, width, pitch, height, + TJ.getPixelSize(pixelFormat), flags | TJ.getFlags(pixelFormat)); + } + + public byte [] decompress(int width, int pitch, int height, + int pixelFormat, int flags) throws Exception { + if(width < 0 || height < 0 || pitch < 0 || pixelFormat < 0 + || pixelFormat >= TJ.NUMPIXFORMATS) + throw new Exception("Invalid argument in decompress()"); + int pixelSize = TJ.getPixelSize(pixelFormat); + int scaledWidth = getScaledWidth(width, height); + int scaledHeight = getScaledHeight(width, height); + if(pitch == 0) pitch = scaledWidth * pixelSize; + long bufSize; + if(pixelFormat == TJ.YUV) + bufSize = TJ.bufSizeYUV(width, height, header.subsamp); + else bufSize = pitch * scaledHeight; + byte [] buf = new byte[(int)bufSize]; + if(jpegBuf == null) throw new Exception("JPEG buffer not initialized"); + decompress(jpegBuf, jpegBuf.length, buf, width, pitch, height, + TJ.getPixelSize(pixelFormat), flags | TJ.getFlags(pixelFormat)); + return buf; + } + public void close() throws Exception { destroy(); } @@ -52,16 +121,28 @@ public class TJDecompressor { private native void destroy() throws Exception; - public native TJHeaderInfo decompressHeader(byte [] srcbuf, long size) + private native TJHeaderInfo decompressHeader(byte [] srcBuf, long size) throws Exception; - public native void decompress(byte [] srcbuf, long size, byte [] dstbuf, - int width, int pitch, int height, int pixelsize, int flags) + private void decompressHeader() throws Exception { + header = decompressHeader(jpegBuf, jpegBuf.length); + } + + private native void decompress(byte [] srcBuf, long size, byte [] dstBuf, + int width, int pitch, int height, int pixelSize, int flags) throws Exception; + private native int getScaledWidth(int input_width, int input_height, + int output_width, int output_height) throws Exception; + + private native int getScaledHeight(int input_width, int input_height, + int output_width, int output_height) throws Exception; + static { System.loadLibrary("turbojpeg"); } private long handle = 0; + private byte [] jpegBuf = null; + TJHeaderInfo header = null; }; |