Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import android.media.MediaCodecInfo;

public class Main {
    public static byte[] CropYuv(int src_format, byte[] src_yuv, int src_width, int src_height, int dst_width,
            int dst_height) {
        byte[] dst_yuv = null;
        if (src_yuv == null)
            return dst_yuv;
        // simple implementation: copy the corner
        if (src_width == dst_width && src_height == dst_height) {
            dst_yuv = src_yuv;
        } else {
            dst_yuv = new byte[(int) (dst_width * dst_height * 1.5)];
            switch (src_format) {
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar: // I420
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedPlanar: // YV12
            {
                // copy Y
                int src_yoffset = 0;
                int dst_yoffset = 0;
                for (int i = 0; i < dst_height; i++) {
                    System.arraycopy(src_yuv, src_yoffset, dst_yuv, dst_yoffset, dst_width);
                    src_yoffset += src_width;
                    dst_yoffset += dst_width;
                }

                // copy u
                int src_uoffset = 0;
                int dst_uoffset = 0;
                src_yoffset = src_width * src_height;
                dst_yoffset = dst_width * dst_height;
                for (int i = 0; i < dst_height / 2; i++) {
                    System.arraycopy(src_yuv, src_yoffset + src_uoffset, dst_yuv, dst_yoffset + dst_uoffset,
                            dst_width / 2);
                    src_uoffset += src_width / 2;
                    dst_uoffset += dst_width / 2;
                }

                // copy v
                int src_voffset = 0;
                int dst_voffset = 0;
                src_uoffset = src_width * src_height + src_width * src_height / 4;
                dst_uoffset = dst_width * dst_height + dst_width * dst_height / 4;
                for (int i = 0; i < dst_height / 2; i++) {
                    System.arraycopy(src_yuv, src_uoffset + src_voffset, dst_yuv, dst_uoffset + dst_voffset,
                            dst_width / 2);
                    src_voffset += src_width / 2;
                    dst_voffset += dst_width / 2;
                }

            }
                break;
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar: // NV12
            case MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420PackedSemiPlanar: // NV21
            case MediaCodecInfo.CodecCapabilities.COLOR_TI_FormatYUV420PackedSemiPlanar:
            case MediaCodecInfo.CodecCapabilities.COLOR_QCOM_FormatYUV420SemiPlanar: {
                // copy Y
                int src_yoffset = 0;
                int dst_yoffset = 0;
                for (int i = 0; i < dst_height; i++) {
                    System.arraycopy(src_yuv, src_yoffset, dst_yuv, dst_yoffset, dst_width);
                    src_yoffset += src_width;
                    dst_yoffset += dst_width;
                }

                // copy u and v
                int src_uoffset = 0;
                int dst_uoffset = 0;
                src_yoffset = src_width * src_height;
                dst_yoffset = dst_width * dst_height;
                for (int i = 0; i < dst_height / 2; i++) {
                    System.arraycopy(src_yuv, src_yoffset + src_uoffset, dst_yuv, dst_yoffset + dst_uoffset,
                            dst_width);
                    src_uoffset += src_width;
                    dst_uoffset += dst_width;
                }
            }
                break;

            default: {
                dst_yuv = null;
            }
                break;
            }
        }
        return dst_yuv;
    }
}