Hash :
df9dbff8
Author :
Date :
2023-11-11T12:25:03
TurboJPEG: New param to limit virt array mem usage This corresponds to max_memory_to_use in the jpeg_memory_mgr struct in the libjpeg API, except that the TurboJPEG parameter is specified in megabytes. Because this is 2023 and computers with less than 1 MB of memory are not a thing (at least not within the scope of libjpeg-turbo support), it isn't useful to allow a limit less than 1 MB to be specified. Furthermore, because TurboJPEG parameters are signed integers, if we allowed the memory limit to be specified in bytes, then it would be impossible to specify a limit larger than 2 GB on 64-bit machines. Because max_memory_to_use is a long signed integer, effectively we can specify a limit of up to 2 petabytes on 64-bit machines if the TurboJPEG parameter is specified in megabytes. (2 PB should be enough for anybody, right?) This commit also bumps the TurboJPEG API version to 3.0.1. Since the TurboJPEG API version no longer tracks the libjpeg-turbo version, it makes sense to increment the API revision number when adding constants, to increment the minor version number when adding functions, and to increment the major version number for a complete overhaul. This commit also removes the vestigial TJ_NUMPARAM macro, which was never defined because it proved unnecessary. Partially implements #735
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.libjpegturbo.turbojpeg</a></div>
<h2 title="Class YUVImage" class="title">Class YUVImage</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.libjpegturbo.turbojpeg.YUVImage</li>
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<pre>public class <span class="typeNameLabel">YUVImage</span>
extends java.lang.Object</pre>
<div class="block">This class encapsulates a planar YUV image and the metadata
associated with it. The TurboJPEG API allows both the JPEG compression and
decompression pipelines to be split into stages: YUV encode, compress from
YUV, decompress to YUV, and YUV decode. A <code>YUVImage</code> instance
serves as the destination image for YUV encode and decompress-to-YUV
operations and as the source image for compress-from-YUV and YUV decode
operations.
<p>
Technically, the JPEG format uses the YCbCr colorspace (which is technically
not a colorspace but a color transform), but per the convention of the
digital video community, the TurboJPEG API uses "YUV" to refer to an image
format consisting of Y, Cb, and Cr image planes.
<p>
Each plane is simply a 2D array of bytes, each byte representing the value
of one of the components (Y, Cb, or Cr) at a particular location in the
image. The width and height of each plane are determined by the image
width, height, and level of chrominance subsampling. The luminance plane
width is the image width padded to the nearest multiple of the horizontal
subsampling factor (1 in the case of 4:4:4, grayscale, 4:4:0, or 4:4:1; 2 in
the case of 4:2:2 or 4:2:0; 4 in the case of 4:1:1.) Similarly, the
luminance plane height is the image height padded to the nearest multiple of
the vertical subsampling factor (1 in the case of 4:4:4, 4:2:2, grayscale,
or 4:1:1; 2 in the case of 4:2:0 or 4:4:0; 4 in the case of 4:4:1.) This is
irrespective of any additional padding that may be specified as an argument
to the various YUVImage methods. The chrominance plane width is equal to
the luminance plane width divided by the horizontal subsampling factor, and
the chrominance plane height is equal to the luminance plane height divided
by the vertical subsampling factor.
<p>
For example, if the source image is 35 x 35 pixels and 4:2:2 subsampling is
used, then the luminance plane would be 36 x 35 bytes, and each of the
chrominance planes would be 18 x 35 bytes. If you specify a row alignment
of 4 bytes on top of this, then the luminance plane would be 36 x 35 bytes,
and each of the chrominance planes would be 20 x 35 bytes.</div>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D%5B%5D,int%5B%5D,int,int%5B%5D,int,int)">YUVImage</a></span>​(byte[][] planes,
int[] offsets,
int width,
int[] strides,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Create a new <code>YUVImage</code> instance from a set of existing image
planes.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(byte%5B%5D,int,int,int,int)">YUVImage</a></span>​(byte[] yuvImage,
int width,
int align,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Create a new <code>YUVImage</code> instance from an existing unified
buffer.</div>
</td>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int,int%5B%5D,int,int)">YUVImage</a></span>​(int width,
int[] strides,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Create a new <code>YUVImage</code> instance backed by separate image
planes, and allocate memory for the image planes.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int,int,int,int)">YUVImage</a></span>​(int width,
int align,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Create a new <code>YUVImage</code> instance backed by a unified buffer,
and allocate memory for the buffer.</div>
</td>
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<td class="colFirst"><code>byte[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBuf()">getBuf</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the YUV buffer (if this image is stored in a unified buffer rather
than separate image planes.)</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHeight()">getHeight</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the height of the YUV image (or subregion.)</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>int[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getOffsets()">getOffsets</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the offsets (in bytes) of each plane within the planes of a larger
YUV image.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPad()">getPad</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the row alignment (in bytes) of the YUV buffer (if this image is
stored in a unified buffer rather than separate image planes.)</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>byte[][]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPlanes()">getPlanes</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the YUV image planes.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSize()">getSize</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the size (in bytes) of the YUV buffer (if this image is stored in
a unified buffer rather than separate image planes.)</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>int[]</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getStrides()">getStrides</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the number of bytes per row of each plane in the YUV image.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSubsamp()">getSubsamp</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the level of chrominance subsampling used in the YUV image.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getWidth()">getWidth</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the width of the YUV image (or subregion.)</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setBuf(byte%5B%5D%5B%5D,int%5B%5D,int,int%5B%5D,int,int)">setBuf</a></span>​(byte[][] planes,
int[] offsets,
int width,
int[] strides,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Assign a set of image planes to this <code>YUVImage</code> instance.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setBuf(byte%5B%5D,int,int,int,int)">setBuf</a></span>​(byte[] yuvImage,
int width,
int align,
int height,
int subsamp)</code></th>
<td class="colLast">
<div class="block">Assign a unified buffer to this <code>YUVImage</code> instance.</div>
</td>
</tr>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>YUVImage</h4>
<pre>public YUVImage​(int width,
int[] strides,
int height,
int subsamp)</pre>
<div class="block">Create a new <code>YUVImage</code> instance backed by separate image
planes, and allocate memory for the image planes.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>width</code> - width (in pixels) of the YUV image</dd>
<dd><code>strides</code> - an array of integers, each specifying the number of bytes
per row in the corresponding plane of the YUV image. Setting the stride
for any plane to 0 is the same as setting it to the plane width (see
<a href="YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>above</code></a>.) If <code>strides</code> is null, then the
strides for all planes will be set to their respective plane widths. When
using this constructor, the stride for each plane must be equal to or
greater than the plane width.</dd>
<dd><code>height</code> - height (in pixels) of the YUV image</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling to be used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<h4>YUVImage</h4>
<pre>public YUVImage​(int width,
int align,
int height,
int subsamp)</pre>
<div class="block">Create a new <code>YUVImage</code> instance backed by a unified buffer,
and allocate memory for the buffer.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>width</code> - width (in pixels) of the YUV image</dd>
<dd><code>align</code> - row alignment (in bytes) of the YUV image (must be a power of
2.) Setting this parameter to n specifies that each row in each plane of
the YUV image will be padded to the nearest multiple of n bytes
(1 = unpadded.)</dd>
<dd><code>height</code> - height (in pixels) of the YUV image</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling to be used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<h4>YUVImage</h4>
<pre>public YUVImage​(byte[][] planes,
int[] offsets,
int width,
int[] strides,
int height,
int subsamp)</pre>
<div class="block">Create a new <code>YUVImage</code> instance from a set of existing image
planes.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>planes</code> - an array of buffers representing the Y, U (Cb), and V (Cr)
image planes (or just the Y plane, if the image is grayscale.) These
planes can be contiguous or non-contiguous in memory. Plane
<code>i</code> should be at least <code>offsets[i] +
<a href="TJ.html#planeSizeYUV(int,int,int,int,int)"><code>TJ.planeSizeYUV</code></a>(i, width, strides[i], height, subsamp)</code>
bytes in size.</dd>
<dd><code>offsets</code> - If this <code>YUVImage</code> instance represents a
subregion of a larger image, then <code>offsets[i]</code> specifies the
offset (in bytes) of the subregion within plane <code>i</code> of the
larger image. Setting this to null is the same as setting the offsets for
all planes to 0.</dd>
<dd><code>width</code> - width (in pixels) of the new YUV image (or subregion)</dd>
<dd><code>strides</code> - an array of integers, each specifying the number of bytes
per row in the corresponding plane of the YUV image. Setting the stride
for any plane to 0 is the same as setting it to the plane width (see
<a href="YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>above</code></a>.) If <code>strides</code> is null, then the
strides for all planes will be set to their respective plane widths. You
can adjust the strides in order to add an arbitrary amount of row padding
to each plane or to specify that this <code>YUVImage</code> instance is a
subregion of a larger image (in which case, <code>strides[i]</code> should
be set to the plane width of plane <code>i</code> in the larger image.)</dd>
<dd><code>height</code> - height (in pixels) of the new YUV image (or subregion)</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<h4>YUVImage</h4>
<pre>public YUVImage​(byte[] yuvImage,
int width,
int align,
int height,
int subsamp)</pre>
<div class="block">Create a new <code>YUVImage</code> instance from an existing unified
buffer.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>yuvImage</code> - buffer that contains or will receive a unified planar YUV
image. Use <a href="TJ.html#bufSizeYUV(int,int,int,int)"><code>TJ.bufSizeYUV()</code></a> to determine the minimum
size for this buffer. The Y, U (Cb), and V (Cr) image planes are stored
sequentially in the buffer. (See <a href="YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>above</code></a> for a description
of the image format.)</dd>
<dd><code>width</code> - width (in pixels) of the YUV image</dd>
<dd><code>align</code> - row alignment (in bytes) of the YUV image (must be a power of
2.) Setting this parameter to n specifies that each row in each plane of
the YUV image will be padded to the nearest multiple of n bytes
(1 = unpadded.)</dd>
<dd><code>height</code> - height (in pixels) of the YUV image</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<h3>Method Detail</h3>
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<h4>setBuf</h4>
<pre class="methodSignature">public void setBuf​(byte[][] planes,
int[] offsets,
int width,
int[] strides,
int height,
int subsamp)</pre>
<div class="block">Assign a set of image planes to this <code>YUVImage</code> instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>planes</code> - an array of buffers representing the Y, U (Cb), and V (Cr)
image planes (or just the Y plane, if the image is grayscale.) These
planes can be contiguous or non-contiguous in memory. Plane
<code>i</code> should be at least <code>offsets[i] +
<a href="TJ.html#planeSizeYUV(int,int,int,int,int)"><code>TJ.planeSizeYUV</code></a>(i, width, strides[i], height, subsamp)</code>
bytes in size.</dd>
<dd><code>offsets</code> - If this <code>YUVImage</code> instance represents a
subregion of a larger image, then <code>offsets[i]</code> specifies the
offset (in bytes) of the subregion within plane <code>i</code> of the
larger image. Setting this to null is the same as setting the offsets for
all planes to 0.</dd>
<dd><code>width</code> - width (in pixels) of the YUV image (or subregion)</dd>
<dd><code>strides</code> - an array of integers, each specifying the number of bytes
per row in the corresponding plane of the YUV image. Setting the stride
for any plane to 0 is the same as setting it to the plane width (see
<a href="YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>above</code></a>.) If <code>strides</code> is null, then the
strides for all planes will be set to their respective plane widths. You
can adjust the strides in order to add an arbitrary amount of row padding
to each plane or to specify that this <code>YUVImage</code> instance is a
subregion of a larger image (in which case, <code>strides[i]</code> should
be set to the plane width of plane <code>i</code> in the larger image.)</dd>
<dd><code>height</code> - height (in pixels) of the YUV image (or subregion)</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<pre class="methodSignature">public void setBuf​(byte[] yuvImage,
int width,
int align,
int height,
int subsamp)</pre>
<div class="block">Assign a unified buffer to this <code>YUVImage</code> instance.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>yuvImage</code> - buffer that contains or will receive a unified planar YUV
image. Use <a href="TJ.html#bufSizeYUV(int,int,int,int)"><code>TJ.bufSizeYUV()</code></a> to determine the minimum
size for this buffer. The Y, U (Cb), and V (Cr) image planes are stored
sequentially in the buffer. (See <a href="YUVImage.html" title="class in org.libjpegturbo.turbojpeg"><code>above</code></a> for a description
of the image format.)</dd>
<dd><code>width</code> - width (in pixels) of the YUV image</dd>
<dd><code>align</code> - row alignment (in bytes) of the YUV image (must be a power of
2.) Setting this parameter to n specifies that each row in each plane of
the YUV image will be padded to the nearest multiple of n bytes
(1 = unpadded.)</dd>
<dd><code>height</code> - height (in pixels) of the YUV image</dd>
<dd><code>subsamp</code> - the level of chrominance subsampling used in the YUV
image (one of <a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>)</dd>
</dl>
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<pre class="methodSignature">public int getWidth()</pre>
<div class="block">Returns the width of the YUV image (or subregion.)</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the width of the YUV image (or subregion)</dd>
</dl>
</li>
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<pre class="methodSignature">public int getHeight()</pre>
<div class="block">Returns the height of the YUV image (or subregion.)</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the height of the YUV image (or subregion)</dd>
</dl>
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<h4>getPad</h4>
<pre class="methodSignature">public int getPad()</pre>
<div class="block">Returns the row alignment (in bytes) of the YUV buffer (if this image is
stored in a unified buffer rather than separate image planes.)</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the row alignment of the YUV buffer</dd>
</dl>
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<pre class="methodSignature">public int[] getStrides()</pre>
<div class="block">Returns the number of bytes per row of each plane in the YUV image.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of bytes per row of each plane in the YUV image</dd>
</dl>
</li>
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<h4>getOffsets</h4>
<pre class="methodSignature">public int[] getOffsets()</pre>
<div class="block">Returns the offsets (in bytes) of each plane within the planes of a larger
YUV image.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the offsets (in bytes) of each plane within the planes of a larger
YUV image</dd>
</dl>
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<pre class="methodSignature">public int getSubsamp()</pre>
<div class="block">Returns the level of chrominance subsampling used in the YUV image. See
<a href="TJ.html#SAMP_444"><code>TJ.SAMP_*</code></a>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the level of chrominance subsampling used in the YUV image</dd>
</dl>
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<h4>getPlanes</h4>
<pre class="methodSignature">public byte[][] getPlanes()</pre>
<div class="block">Returns the YUV image planes. If the image is stored in a unified buffer,
then all image planes will point to that buffer.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the YUV image planes</dd>
</dl>
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<h4>getBuf</h4>
<pre class="methodSignature">public byte[] getBuf()</pre>
<div class="block">Returns the YUV buffer (if this image is stored in a unified buffer rather
than separate image planes.)</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the YUV buffer</dd>
</dl>
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<h4>getSize</h4>
<pre class="methodSignature">public int getSize()</pre>
<div class="block">Returns the size (in bytes) of the YUV buffer (if this image is stored in
a unified buffer rather than separate image planes.)</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the size (in bytes) of the YUV buffer</dd>
</dl>
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