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Refactored YUVImage Java class so that it supports both unified YUV image buffers as well as separate YUV image planes; modified the JNI functions accordingly and added new helper functions to the TurboJPEG C API (tjPlaneWidth(), tjPlaneHeight(), tjPlaneSizeYUV()) to facilitate those modifications; changed potentially confusing "component width" and "component height" terms to "plane width" and "plane height" and modified variable names in turbojpeg.c to reflect this; numerous other documentation tweaks

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1360 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2014-08-17 12:23:49 +00:00
parent ef5d1ea229
commit 3d037a5c72
28 changed files with 2278 additions and 904 deletions
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82
java/org/libjpegturbo/turbojpeg/TJ.java
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@@ -84,7 +84,8 @@ public final class TJ {
* @param subsamp the level of chrominance subsampling (one of
* <code>SAMP_*</code>)
*
* @return the MCU block width for the given level of chrominance subsampling
* @return the MCU block width for the given level of chrominance
* subsampling.
*/
public static int getMCUWidth(int subsamp) throws Exception {
if (subsamp < 0 || subsamp >= NUMSAMP)
@@ -105,7 +106,7 @@ public final class TJ {
* <code>SAMP_*</code>)
*
* @return the MCU block height for the given level of chrominance
* subsampling
* subsampling.
*/
public static int getMCUHeight(int subsamp) throws Exception {
if (subsamp < 0 || subsamp >= NUMSAMP)
@@ -214,7 +215,7 @@ public final class TJ {
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the pixel size (in bytes) for the given pixel format
* @return the pixel size (in bytes) for the given pixel format.
*/
public static int getPixelSize(int pixelFormat) throws Exception {
if (pixelFormat < 0 || pixelFormat >= NUMPF)
@@ -236,7 +237,7 @@ public final class TJ {
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the red offset for the given pixel format
* @return the red offset for the given pixel format.
*/
public static int getRedOffset(int pixelFormat) throws Exception {
if (pixelFormat < 0 || pixelFormat >= NUMPF)
@@ -258,7 +259,7 @@ public final class TJ {
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the green offset for the given pixel format
* @return the green offset for the given pixel format.
*/
public static int getGreenOffset(int pixelFormat) throws Exception {
if (pixelFormat < 0 || pixelFormat >= NUMPF)
@@ -280,7 +281,7 @@ public final class TJ {
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the blue offset for the given pixel format
* @return the blue offset for the given pixel format.
*/
public static int getBlueOffset(int pixelFormat) throws Exception {
if (pixelFormat < 0 || pixelFormat >= NUMPF)
@@ -404,7 +405,7 @@ public final class TJ {
* generating the JPEG image (one of {@link TJ TJ.SAMP_*})
*
* @return the maximum size of the buffer (in bytes) required to hold a JPEG
* image with the given width, height, and level of chrominance subsampling
* image with the given width, height, and level of chrominance subsampling.
*/
public static native int bufSize(int width, int height, int jpegSubsamp)
throws Exception;
@@ -416,8 +417,7 @@ public final class TJ {
* @param width the width (in pixels) of the YUV image
*
* @param pad the width of each line in each plane of the image is padded to
* the nearest multiple of this number of bytes (must be a power of
* 2.)
* the nearest multiple of this number of bytes (must be a power of 2.)
*
* @param height the height (in pixels) of the YUV image
*
@@ -425,7 +425,7 @@ public final class TJ {
* image (one of {@link TJ TJ.SAMP_*})
*
* @return the size of the buffer (in bytes) required to hold a YUV planar
* image with the given width, height, and level of chrominance subsampling
* image with the given width, height, and level of chrominance subsampling.
*/
public static native int bufSizeYUV(int width, int pad, int height,
int subsamp)
@@ -438,12 +438,72 @@ public final class TJ {
public static native int bufSizeYUV(int width, int height, int subsamp)
throws Exception;
/**
* Returns the size of the buffer (in bytes) required to hold a YUV image
* plane with the given parameters.
*
* @param componentID ID number of the image plane (0 = Y, 1 = U/Cb,
* 2 = V/Cr)
*
* @param width width (in pixels) of the YUV image. NOTE: this is the width
* of the whole image, not the plane width.
*
* @param stride bytes per line in the image plane.
*
* @param height height (in pixels) of the YUV image. NOTE: this is the
* height of the whole image, not the plane height.
*
* @param subsamp the level of chrominance subsampling used in the YUV
* image (one of {@link TJ TJ.SAMP_*})
*
* @return the size of the buffer (in bytes) required to hold a YUV planar
* image with the given parameters.
*/
public static native int planeSizeYUV(int componentID, int width, int stride,
int height, int subsamp)
throws Exception;
/**
* Returns the plane width of a YUV image plane with the given parameters.
* Refer to {@link YUVImage YUVImage} for a description of plane width.
*
* @param componentID ID number of the image plane (0 = Y, 1 = U/Cb,
* 2 = V/Cr)
*
* @param width width (in pixels) of the YUV image
*
* @param subsamp the level of chrominance subsampling used in the YUV image
* (one of {@link TJ TJ.SAMP_*})
*
* @return the plane width of a YUV image plane with the given parameters.
*/
public static native int planeWidth(int componentID, int width, int subsamp)
throws Exception;
/**
* Returns the plane height of a YUV image plane with the given parameters.
* Refer to {@link YUVImage YUVImage} for a description of plane height.
*
* @param componentID ID number of the image plane (0 = Y, 1 = U/Cb,
* 2 = V/Cr)
*
* @param height height (in pixels) of the YUV image
*
* @param subsamp the level of chrominance subsampling used in the YUV image
* (one of {@link TJ TJ.SAMP_*})
*
* @return the plane height of a YUV image plane with the given parameters.
*/
public static native int planeHeight(int componentID, int height,
int subsamp)
throws Exception;
/**
* Returns a list of fractional scaling factors that the JPEG decompressor in
* this implementation of TurboJPEG supports.
*
* @return a list of fractional scaling factors that the JPEG decompressor in
* this implementation of TurboJPEG supports
* this implementation of TurboJPEG supports.
*/
public static native TJScalingFactor[] getScalingFactors()
throws Exception;