com.yy.mediaframework.utils

Class ImageUtil

java.lang.Object

com.yy.mediaframework.utils.ImageUtil

public class ImageUtil
extends java.lang.Object

Created by Administrator on 2016/9/20.

Field Summary

Fields

Modifier and Type	Field and Description
static int	mFileIndex

Constructor Summary

Constructors

Constructor and Description
ImageUtil()

Method Summary

Modifier and Type	Method and Description
static int	ABGRToI420(byte[] rgba, int width, int height, byte[] I420, int arrayOffset, boolean flipVertical)
static int	ConvertToI420(byte[] nv21, int width, int height, byte[] I420, int dstWidth, int dstHight, int rotateAngle, int cropx, int cropy, int cropW, int cropH) This function crops, converts, and rotates.
static int	ConvertToI420Ex(byte[] srcYUV, int src_size, byte[] I420, int arrayOffset, int cropx, int cropy, int src_width, int src_height, int crop_width, int crop_height, int rotateAngle, int yuvFormat) This function crops, converts, and rotates.
static android.graphics.Bitmap	createImgae(byte[] bits, int width, int height)
static java.lang.String	getImageFormatName(int format)
static java.lang.String	getLogFileName()
static int	I420Scale(byte[] Src, int arrayOffset, int srcW, int srcH, byte[] Dst, int dstW, int dstH, int fileterMode, boolean hMirror) Scale an I420 image
static int	I420ToABGR(byte[] I420, int width, int height, byte[] rgba, boolean flipVertical)
static int	I420ToNV12(byte[] I420, int arrayOffset, int width, int height, byte[] nv12, boolean flipVertical) This function convert I420 buffer to NV12 buffer
static void	I420ToNV21(byte[] yuv420p, byte[] yuv420sp, int width, int height, boolean swapUV)
static void	LogImage2Files(byte[] image, java.lang.String imageType)
static double	psnrCoefRGBA2I420(byte[] rgba, byte[] i420, byte[] converter, int width, int height)
static double	psnrCoefRGBA2NV12(byte[] rgba, byte[] nv12, byte[] converter_yuv, int width, int height)
static void	RBGAtoYUV(byte[] argb, int width, int height, byte[] yuv)
static void	save2DTextureToJPEG(int textureId, int width, int height)
static void	SaveEGLSurfaceToJpeg(int width, int height)
static void	saveRGBAToFile(byte[] rgba, int width, int height)
static void	saveToFile(android.graphics.Bitmap bmp, boolean recycle)
static void	saveYUV2File(byte[] data, int width, int height)
static void	saveYUV2JPEG(byte[] data, int width, int height)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mFileIndex

public static int mFileIndex

Constructor Detail

ImageUtil

public ImageUtil()

Method Detail

getLogFileName

public static java.lang.String getLogFileName()

LogImage2Files

public static void LogImage2Files(byte[] image,
                                  java.lang.String imageType)

saveYUV2File

public static void saveYUV2File(byte[] data,
                                int width,
                                int height)

saveYUV2JPEG

public static void saveYUV2JPEG(byte[] data,
                                int width,
                                int height)

createImgae

public static android.graphics.Bitmap createImgae(byte[] bits,
                                                  int width,
                                                  int height)

saveToFile

public static void saveToFile(android.graphics.Bitmap bmp,
                              boolean recycle)

save2DTextureToJPEG

public static void save2DTextureToJPEG(int textureId,
                                       int width,
                                       int height)

SaveEGLSurfaceToJpeg

public static void SaveEGLSurfaceToJpeg(int width,
                                        int height)

saveRGBAToFile

public static void saveRGBAToFile(byte[] rgba,
                                  int width,
                                  int height)

getImageFormatName

public static java.lang.String getImageFormatName(int format)

RBGAtoYUV

public static void RBGAtoYUV(byte[] argb,
                             int width,
                             int height,
                             byte[] yuv)

I420ToNV21

public static void I420ToNV21(byte[] yuv420p,
                              byte[] yuv420sp,
                              int width,
                              int height,
                              boolean swapUV)

psnrCoefRGBA2NV12

public static double psnrCoefRGBA2NV12(byte[] rgba,
                                       byte[] nv12,
                                       byte[] converter_yuv,
                                       int width,
                                       int height)

psnrCoefRGBA2I420

public static double psnrCoefRGBA2I420(byte[] rgba,
                                       byte[] i420,
                                       byte[] converter,
                                       int width,
                                       int height)

ConvertToI420

public static int ConvertToI420(byte[] nv21,
                                int width,
                                int height,
                                byte[] I420,
                                int dstWidth,
                                int dstHight,
                                int rotateAngle,
                                int cropx,
                                int cropy,
                                int cropW,
                                int cropH)

This function crops, converts, and rotates. You should think of it in that order. Crops the original image, which is src_width x src_height, to crop_width x crop_height. At this point the image is still not rotated. Converts the cropped region to I420. Supports inverted source for src_height negative. Rotates by 90, 180 or 270 degrees. The buffer the caller provides should account for rotation. Be especially important to get stride of the destination correct. e.g. 640 x 480 NV12 captured Crop to 640 x 360 Rotate by 90 degrees to 360 x 640. Caller passes stride of 360 for Y and 360 / 2 for U and V. Caller passes crop_width of 640, crop_height of 360.

Parameters:

nv21 - input NV21 buffer form camera capture

width - NV21 src width

height - NV21 src height

I420 - output I420 (IYUV) buffer

dstWidth - output width

dstHight - output height

rotateAngle - rotate angle

cropx - crop start point

cropy - crop start point

cropW - crop width

cropH - crop height

ConvertToI420Ex

public static int ConvertToI420Ex(byte[] srcYUV,
                                  int src_size,
                                  byte[] I420,
                                  int arrayOffset,
                                  int cropx,
                                  int cropy,
                                  int src_width,
                                  int src_height,
                                  int crop_width,
                                  int crop_height,
                                  int rotateAngle,
                                  int yuvFormat)

This function crops, converts, and rotates. You should think of it in that order. Crops the original image, which is src_width x src_height, to crop_width x crop_height. At this point the image is still not rotated. Converts the cropped region to I420. Supports inverted source for src_height negative. Rotates by 90, 180 or 270 degrees. The buffer the caller provides should account for rotation. Be especially important to get stride of the destination correct. e.g. 640 x 480 NV12 captured Crop to 640 x 360 Rotate by 90 degrees to 360 x 640. Caller passes stride of 360 for Y and 360 / 2 for U and V. Caller passes crop_width of 640, crop_height of 360.

Parameters:

srcYUV - current support I420 YV12 NV21 NV12

src_size - src YUV buffer size

I420 - dst YUV buffer

arrayOffset - dst YUV buffer data arrayOffset, the same as ByteBuffer arrayOffset()

cropx - crop x coordinate

cropy - crop y coordinate

src_width - src YUV width

src_height - src YUV height

crop_width - dst YUV width

crop_height - dst YUV height

rotateAngle - rotate angle

yuvFormat - src YUV format, support I420 YV12 NV21 NV12

Returns:

Returns 0 for successful; -1 for invalid parameter. Non-zero for failure.

I420ToNV12

public static int I420ToNV12(byte[] I420,
                             int arrayOffset,
                             int width,
                             int height,
                             byte[] nv12,
                             boolean flipVertical)

This function convert I420 buffer to NV12 buffer

Parameters:

I420 - input I420 buffer

arrayOffset - native array 数据偏移

width - input I420 buffer width

height - input I420 buffer height

nv12 - outpu NV21 buffer

flipVertical - flip NV21 image vertically or not

I420Scale

public static int I420Scale(byte[] Src,
                            int arrayOffset,
                            int srcW,
                            int srcH,
                            byte[] Dst,
                            int dstW,
                            int dstH,
                            int fileterMode,
                            boolean hMirror)

Scale an I420 image

Parameters:

Src - I420 source byte buffer

srcW - src width

srcH - src height

Dst - I420 destination byte buffer

dstW - dst width

dstH - dst height

fileterMode - see below

hMirror - horizontal mirror

Returns:

0 if success typedef enum FilterMode { kFilterNone = 0, Point sample; Fastest. kFilterLinear = 1, Filter horizontally only. kFilterBilinear = 2, Faster than box, but lower quality scaling down. kFilterBox = 3 Highest quality. } FilterModeEnum;

ABGRToI420

public static int ABGRToI420(byte[] rgba,
                             int width,
                             int height,
                             byte[] I420,
                             int arrayOffset,
                             boolean flipVertical)

I420ToABGR

public static int I420ToABGR(byte[] I420,
                             int width,
                             int height,
                             byte[] rgba,
                             boolean flipVertical)