421 lines
15 KiB
Java
421 lines
15 KiB
Java
/*
|
|
* Copyright (C) 2010 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package android.graphics;
|
|
|
|
public class ImageFormat {
|
|
/*
|
|
* these constants are chosen to be binary compatible with their previous
|
|
* location in PixelFormat.java
|
|
*/
|
|
|
|
public static final int UNKNOWN = 0;
|
|
|
|
/**
|
|
* RGB format used for pictures encoded as RGB_565. See
|
|
* {@link android.hardware.Camera.Parameters#setPictureFormat(int)}.
|
|
*/
|
|
public static final int RGB_565 = 4;
|
|
|
|
/**
|
|
* <p>Android YUV format.</p>
|
|
*
|
|
* <p>This format is exposed to software decoders and applications.</p>
|
|
*
|
|
* <p>YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed
|
|
* by (W/2) x (H/2) Cr and Cb planes.</p>
|
|
*
|
|
* <p>This format assumes
|
|
* <ul>
|
|
* <li>an even width</li>
|
|
* <li>an even height</li>
|
|
* <li>a horizontal stride multiple of 16 pixels</li>
|
|
* <li>a vertical stride equal to the height</li>
|
|
* </ul>
|
|
* </p>
|
|
*
|
|
* <pre> y_size = stride * height
|
|
* c_stride = ALIGN(stride/2, 16)
|
|
* c_size = c_stride * height/2
|
|
* size = y_size + c_size * 2
|
|
* cr_offset = y_size
|
|
* cb_offset = y_size + c_size</pre>
|
|
*
|
|
* <p>For the {@link android.hardware.camera2} API, the {@link #YUV_420_888} format is
|
|
* recommended for YUV output instead.</p>
|
|
*
|
|
* <p>For the older camera API, this format is guaranteed to be supported for
|
|
* {@link android.hardware.Camera} preview images since API level 12; for earlier API versions,
|
|
* check {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}.
|
|
*
|
|
* <p>Note that for camera preview callback use (see
|
|
* {@link android.hardware.Camera#setPreviewCallback}), the
|
|
* <var>stride</var> value is the smallest possible; that is, it is equal
|
|
* to:
|
|
*
|
|
* <pre>stride = ALIGN(width, 16)</pre>
|
|
*
|
|
* @see android.hardware.Camera.Parameters#setPreviewCallback
|
|
* @see android.hardware.Camera.Parameters#setPreviewFormat
|
|
* @see android.hardware.Camera.Parameters#getSupportedPreviewFormats
|
|
* </p>
|
|
*/
|
|
public static final int YV12 = 0x32315659;
|
|
|
|
/**
|
|
* <p>Android Y8 format.</p>
|
|
*
|
|
* <p>Y8 is a YUV planar format comprised of a WxH Y plane only, with each pixel
|
|
* being represented by 8 bits. It is equivalent to just the Y plane from {@link #YV12}
|
|
* format.</p>
|
|
*
|
|
* <p>This format assumes
|
|
* <ul>
|
|
* <li>an even width</li>
|
|
* <li>an even height</li>
|
|
* <li>a horizontal stride multiple of 16 pixels</li>
|
|
* </ul>
|
|
* </p>
|
|
*
|
|
* <pre> y_size = stride * height </pre>
|
|
*
|
|
* <p>For example, the {@link android.media.Image} object can provide data
|
|
* in this format from a {@link android.hardware.camera2.CameraDevice}
|
|
* through a {@link android.media.ImageReader} object if this format is
|
|
* supported by {@link android.hardware.camera2.CameraDevice}.</p>
|
|
*
|
|
* @see android.media.Image
|
|
* @see android.media.ImageReader
|
|
* @see android.hardware.camera2.CameraDevice
|
|
*
|
|
* @hide
|
|
*/
|
|
public static final int Y8 = 0x20203859;
|
|
|
|
/**
|
|
* <p>Android Y16 format.</p>
|
|
*
|
|
* Y16 is a YUV planar format comprised of a WxH Y plane, with each pixel
|
|
* being represented by 16 bits. It is just like {@link #Y8}, but has 16
|
|
* bits per pixel (little endian).</p>
|
|
*
|
|
* <p>This format assumes
|
|
* <ul>
|
|
* <li>an even width</li>
|
|
* <li>an even height</li>
|
|
* <li>a horizontal stride multiple of 16 pixels</li>
|
|
* </ul>
|
|
* </p>
|
|
*
|
|
* <pre> y_size = stride * height </pre>
|
|
*
|
|
* <p>For example, the {@link android.media.Image} object can provide data
|
|
* in this format from a {@link android.hardware.camera2.CameraDevice}
|
|
* through a {@link android.media.ImageReader} object if this format is
|
|
* supported by {@link android.hardware.camera2.CameraDevice}.</p>
|
|
*
|
|
* @see android.media.Image
|
|
* @see android.media.ImageReader
|
|
* @see android.hardware.camera2.CameraDevice
|
|
*
|
|
* @hide
|
|
*/
|
|
public static final int Y16 = 0x20363159;
|
|
|
|
/**
|
|
* YCbCr format, used for video.
|
|
*
|
|
* <p>For the {@link android.hardware.camera2} API, the {@link #YUV_420_888} format is
|
|
* recommended for YUV output instead.</p>
|
|
*
|
|
* <p>Whether this format is supported by the old camera API can be determined by
|
|
* {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}.</p>
|
|
*
|
|
*/
|
|
public static final int NV16 = 0x10;
|
|
|
|
/**
|
|
* YCrCb format used for images, which uses the NV21 encoding format.
|
|
*
|
|
* <p>This is the default format
|
|
* for {@link android.hardware.Camera} preview images, when not otherwise set with
|
|
* {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}.</p>
|
|
*
|
|
* <p>For the {@link android.hardware.camera2} API, the {@link #YUV_420_888} format is
|
|
* recommended for YUV output instead.</p>
|
|
*/
|
|
public static final int NV21 = 0x11;
|
|
|
|
/**
|
|
* YCbCr format used for images, which uses YUYV (YUY2) encoding format.
|
|
*
|
|
* <p>For the {@link android.hardware.camera2} API, the {@link #YUV_420_888} format is
|
|
* recommended for YUV output instead.</p>
|
|
*
|
|
* <p>This is an alternative format for {@link android.hardware.Camera} preview images. Whether
|
|
* this format is supported by the camera hardware can be determined by
|
|
* {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}.</p>
|
|
*/
|
|
public static final int YUY2 = 0x14;
|
|
|
|
/**
|
|
* Compressed JPEG format.
|
|
*
|
|
* <p>This format is always supported as an output format for the
|
|
* {@link android.hardware.camera2} API, and as a picture format for the older
|
|
* {@link android.hardware.Camera} API</p>
|
|
*/
|
|
public static final int JPEG = 0x100;
|
|
|
|
/**
|
|
* <p>Multi-plane Android YUV format</p>
|
|
*
|
|
* <p>This format is a generic YCbCr format, capable of describing any 4:2:0
|
|
* chroma-subsampled planar or semiplanar buffer (but not fully interleaved),
|
|
* with 8 bits per color sample.</p>
|
|
*
|
|
* <p>Images in this format are always represented by three separate buffers
|
|
* of data, one for each color plane. Additional information always
|
|
* accompanies the buffers, describing the row stride and the pixel stride
|
|
* for each plane.</p>
|
|
*
|
|
* <p>The order of planes in the array returned by
|
|
* {@link android.media.Image#getPlanes() Image#getPlanes()} is guaranteed such that
|
|
* plane #0 is always Y, plane #1 is always U (Cb), and plane #2 is always V (Cr).</p>
|
|
*
|
|
* <p>The Y-plane is guaranteed not to be interleaved with the U/V planes
|
|
* (in particular, pixel stride is always 1 in
|
|
* {@link android.media.Image.Plane#getPixelStride() yPlane.getPixelStride()}).</p>
|
|
*
|
|
* <p>The U/V planes are guaranteed to have the same row stride and pixel stride
|
|
* (in particular,
|
|
* {@link android.media.Image.Plane#getRowStride() uPlane.getRowStride()}
|
|
* == {@link android.media.Image.Plane#getRowStride() vPlane.getRowStride()} and
|
|
* {@link android.media.Image.Plane#getPixelStride() uPlane.getPixelStride()}
|
|
* == {@link android.media.Image.Plane#getPixelStride() vPlane.getPixelStride()};
|
|
* ).</p>
|
|
*
|
|
* <p>For example, the {@link android.media.Image} object can provide data
|
|
* in this format from a {@link android.hardware.camera2.CameraDevice}
|
|
* through a {@link android.media.ImageReader} object.</p>
|
|
*
|
|
* @see android.media.Image
|
|
* @see android.media.ImageReader
|
|
* @see android.hardware.camera2.CameraDevice
|
|
*/
|
|
public static final int YUV_420_888 = 0x23;
|
|
|
|
/**
|
|
* <p>General raw camera sensor image format, usually representing a
|
|
* single-channel Bayer-mosaic image. Each pixel color sample is stored with
|
|
* 16 bits of precision.</p>
|
|
*
|
|
* <p>The layout of the color mosaic, the maximum and minimum encoding
|
|
* values of the raw pixel data, the color space of the image, and all other
|
|
* needed information to interpret a raw sensor image must be queried from
|
|
* the {@link android.hardware.camera2.CameraDevice} which produced the
|
|
* image.</p>
|
|
*/
|
|
public static final int RAW_SENSOR = 0x20;
|
|
|
|
/**
|
|
* <p>
|
|
* Android 10-bit raw format
|
|
* </p>
|
|
* <p>
|
|
* This is a single-plane, 10-bit per pixel, densely packed (in each row),
|
|
* unprocessed format, usually representing raw Bayer-pattern images coming
|
|
* from an image sensor.
|
|
* </p>
|
|
* <p>
|
|
* In an image buffer with this format, starting from the first pixel of
|
|
* each row, each 4 consecutive pixels are packed into 5 bytes (40 bits).
|
|
* Each one of the first 4 bytes contains the top 8 bits of each pixel, The
|
|
* fifth byte contains the 2 least significant bits of the 4 pixels, the
|
|
* exact layout data for each 4 consecutive pixels is illustrated below
|
|
* ({@code Pi[j]} stands for the jth bit of the ith pixel):
|
|
* </p>
|
|
* <table>
|
|
* <thead>
|
|
* <tr>
|
|
* <th align="center"></th>
|
|
* <th align="center">bit 7</th>
|
|
* <th align="center">bit 6</th>
|
|
* <th align="center">bit 5</th>
|
|
* <th align="center">bit 4</th>
|
|
* <th align="center">bit 3</th>
|
|
* <th align="center">bit 2</th>
|
|
* <th align="center">bit 1</th>
|
|
* <th align="center">bit 0</th>
|
|
* </tr>
|
|
* </thead> <tbody>
|
|
* <tr>
|
|
* <td align="center">Byte 0:</td>
|
|
* <td align="center">P0[9]</td>
|
|
* <td align="center">P0[8]</td>
|
|
* <td align="center">P0[7]</td>
|
|
* <td align="center">P0[6]</td>
|
|
* <td align="center">P0[5]</td>
|
|
* <td align="center">P0[4]</td>
|
|
* <td align="center">P0[3]</td>
|
|
* <td align="center">P0[2]</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td align="center">Byte 1:</td>
|
|
* <td align="center">P1[9]</td>
|
|
* <td align="center">P1[8]</td>
|
|
* <td align="center">P1[7]</td>
|
|
* <td align="center">P1[6]</td>
|
|
* <td align="center">P1[5]</td>
|
|
* <td align="center">P1[4]</td>
|
|
* <td align="center">P1[3]</td>
|
|
* <td align="center">P1[2]</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td align="center">Byte 2:</td>
|
|
* <td align="center">P2[9]</td>
|
|
* <td align="center">P2[8]</td>
|
|
* <td align="center">P2[7]</td>
|
|
* <td align="center">P2[6]</td>
|
|
* <td align="center">P2[5]</td>
|
|
* <td align="center">P2[4]</td>
|
|
* <td align="center">P2[3]</td>
|
|
* <td align="center">P2[2]</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td align="center">Byte 3:</td>
|
|
* <td align="center">P3[9]</td>
|
|
* <td align="center">P3[8]</td>
|
|
* <td align="center">P3[7]</td>
|
|
* <td align="center">P3[6]</td>
|
|
* <td align="center">P3[5]</td>
|
|
* <td align="center">P3[4]</td>
|
|
* <td align="center">P3[3]</td>
|
|
* <td align="center">P3[2]</td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td align="center">Byte 4:</td>
|
|
* <td align="center">P3[1]</td>
|
|
* <td align="center">P3[0]</td>
|
|
* <td align="center">P2[1]</td>
|
|
* <td align="center">P2[0]</td>
|
|
* <td align="center">P1[1]</td>
|
|
* <td align="center">P1[0]</td>
|
|
* <td align="center">P0[1]</td>
|
|
* <td align="center">P0[0]</td>
|
|
* </tr>
|
|
* </tbody>
|
|
* </table>
|
|
* <p>
|
|
* This format assumes
|
|
* <ul>
|
|
* <li>a width multiple of 4 pixels</li>
|
|
* <li>an even height</li>
|
|
* </ul>
|
|
* </p>
|
|
*
|
|
* <pre>size = row stride * height</pre> where the row stride is in <em>bytes</em>,
|
|
* not pixels.
|
|
*
|
|
* <p>
|
|
* Since this is a densely packed format, the pixel stride is always 0. The
|
|
* application must use the pixel data layout defined in above table to
|
|
* access each row data. When row stride is equal to {@code width * (10 / 8)}, there
|
|
* will be no padding bytes at the end of each row, the entire image data is
|
|
* densely packed. When stride is larger than {@code width * (10 / 8)}, padding
|
|
* bytes will be present at the end of each row.
|
|
* </p>
|
|
* <p>
|
|
* For example, the {@link android.media.Image} object can provide data in
|
|
* this format from a {@link android.hardware.camera2.CameraDevice} (if
|
|
* supported) through a {@link android.media.ImageReader} object. The
|
|
* {@link android.media.Image#getPlanes() Image#getPlanes()} will return a
|
|
* single plane containing the pixel data. The pixel stride is always 0 in
|
|
* {@link android.media.Image.Plane#getPixelStride()}, and the
|
|
* {@link android.media.Image.Plane#getRowStride()} describes the vertical
|
|
* neighboring pixel distance (in bytes) between adjacent rows.
|
|
* </p>
|
|
*
|
|
* @see android.media.Image
|
|
* @see android.media.ImageReader
|
|
* @see android.hardware.camera2.CameraDevice
|
|
*/
|
|
public static final int RAW10 = 0x25;
|
|
|
|
/**
|
|
* Use this function to retrieve the number of bits per pixel of an
|
|
* ImageFormat.
|
|
*
|
|
* @param format
|
|
* @return the number of bits per pixel of the given format or -1 if the
|
|
* format doesn't exist or is not supported.
|
|
*/
|
|
public static int getBitsPerPixel(int format) {
|
|
switch (format) {
|
|
case RGB_565:
|
|
return 16;
|
|
case NV16:
|
|
return 16;
|
|
case YUY2:
|
|
return 16;
|
|
case YV12:
|
|
return 12;
|
|
case Y8:
|
|
return 8;
|
|
case Y16:
|
|
return 16;
|
|
case NV21:
|
|
return 12;
|
|
case YUV_420_888:
|
|
return 12;
|
|
case RAW_SENSOR:
|
|
return 16;
|
|
case RAW10:
|
|
return 10;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Determine whether or not this is a public-visible {@code format}.
|
|
*
|
|
* <p>In particular, {@code @hide} formats will return {@code false}.</p>
|
|
*
|
|
* <p>Any other formats (including UNKNOWN) will return {@code false}.</p>
|
|
*
|
|
* @param format an integer format
|
|
* @return a boolean
|
|
*
|
|
* @hide
|
|
*/
|
|
public static boolean isPublicFormat(int format) {
|
|
switch (format) {
|
|
case RGB_565:
|
|
case NV16:
|
|
case YUY2:
|
|
case YV12:
|
|
case JPEG:
|
|
case NV21:
|
|
case YUV_420_888:
|
|
case RAW_SENSOR:
|
|
case RAW10:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|