| /* |
| * 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>This format is guaranteed to be supported for 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; |
| |
| /** |
| * YCbCr format, used for video. Whether this format is supported by the |
| * camera hardware can be determined by |
| * {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}. |
| */ |
| public static final int NV16 = 0x10; |
| |
| /** |
| * YCrCb format used for images, which uses the NV21 encoding format. This |
| * is the default format for camera preview images, when not otherwise set |
| * with {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}. |
| */ |
| public static final int NV21 = 0x11; |
| |
| /** |
| * YCbCr format used for images, which uses YUYV (YUY2) encoding format. |
| * This is an alternative format for camera preview images. Whether this |
| * format is supported by the camera hardware can be determined by |
| * {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}. |
| */ |
| public static final int YUY2 = 0x14; |
| |
| /** |
| * Encoded formats. These are not necessarily supported by the hardware. |
| */ |
| 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, 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>For example, the {@link android.media.Image} object can provide data |
| * in this format from a {@link android.hardware.photography.CameraDevice} |
| * through a {@link android.media.ImageReader} object.</p> |
| * |
| * @see android.media.Image |
| * @see android.media.ImageReader |
| * @see android.hardware.camera.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.photography.CameraDevice} which produced the |
| * image.</p> |
| */ |
| public static final int RAW_SENSOR = 0x201; |
| |
| /** |
| * Raw bayer format used for images, which is 10 bit precision samples |
| * stored in 16 bit words. The filter pattern is RGGB. Whether this format |
| * is supported by the camera hardware can be determined by |
| * {@link android.hardware.Camera.Parameters#getSupportedPreviewFormats()}. |
| * |
| * @hide |
| */ |
| public static final int BAYER_RGGB = 0x200; |
| |
| /** |
| * 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 NV21: |
| return 12; |
| case YUV_420_888: |
| return 12; |
| case RAW_SENSOR: |
| return 16; |
| case BAYER_RGGB: |
| return 16; |
| } |
| return -1; |
| } |
| } |
