732 lines
27 KiB
C#
732 lines
27 KiB
C#
using System.Collections;
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using DotNext;
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using SixLabors.ImageSharp;
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using SixLabors.ImageSharp.Formats.Jpeg;
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using SixLabors.ImageSharp.PixelFormats;
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using System.Text;
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namespace Common
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{
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/// <summary>
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/// 数字处理工具
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/// </summary>
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public class Number
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{
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private static readonly byte[] BitReverseTable = new byte[] {
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0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
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0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
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0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
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0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
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0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
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0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
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0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
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0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
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0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
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0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
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0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
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0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
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0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
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0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
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0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
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0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
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0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
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0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
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0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
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0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
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0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
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0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
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0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
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0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
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0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
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0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
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0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
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0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
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0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
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0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
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0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
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0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
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};
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/// <summary>
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/// 整数转成二进制字节数组
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/// </summary>
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/// <param name="num">整数</param>
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/// <param name="length">整数长度</param>
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/// <param name="isLowNumHigh">是否高位在数组索引低</param>
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/// <returns>二进制字节数组</returns>
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public static Result<byte[]> NumberToBytes(ulong num, uint length, bool isLowNumHigh = false)
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{
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if (length > 8)
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{
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return new(new ArgumentException(
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"Unsigned long number can't over 8 bytes(64 bits).",
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nameof(length)
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));
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}
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var arr = new byte[length];
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if (isLowNumHigh)
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{
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for (var i = 0; i < length; i++)
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{
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arr[length - 1 - i] = Convert.ToByte((num >> (i << 3)) & (0xFF));
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}
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}
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else
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{
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for (var i = 0; i < length; i++)
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{
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arr[i] = Convert.ToByte((num >> ((int)(length - 1 - i) << 3)) & (0xFF));
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}
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}
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return arr;
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}
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/// <summary>
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/// 二进制字节数组转成64bits整数
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/// </summary>
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/// <param name="bytes">二进制字节数组</param>
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/// <param name="isLowNumHigh">是否高位在数组索引低</param>
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/// <returns>整数</returns>
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public static Result<UInt64> BytesToUInt64(byte[] bytes, bool isLowNumHigh = false)
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{
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if (bytes.Length > 8)
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{
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return new(new ArgumentException(
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"Unsigned long number can't over 8 bytes(64 bits).",
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nameof(bytes)
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));
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}
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UInt64 num = 0;
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int len = bytes.Length;
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try
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{
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if (isLowNumHigh)
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{
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for (var i = 0; i < len; i++)
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{
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num += Convert.ToUInt64((UInt64)bytes[len - 1 - i] << (i << 3));
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}
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}
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else
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{
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for (var i = 0; i < len; i++)
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{
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num += Convert.ToUInt64((UInt64)bytes[i] << ((int)(len - 1 - i) << 3));
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}
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}
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return num;
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}
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catch (Exception error)
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{
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return new(error);
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}
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}
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/// <summary>
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/// 二进制字节数组转成32bits整数
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/// </summary>
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/// <param name="bytes">二进制字节数组</param>
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/// <param name="isLowNumHigh">是否高位在数组索引低</param>
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/// <returns>整数</returns>
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public static Result<UInt32> BytesToUInt32(byte[] bytes, bool isLowNumHigh = false)
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{
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if (bytes.Length > 4)
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{
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return new(new ArgumentException(
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"Unsigned long number can't over 4 bytes(32 bits).",
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nameof(bytes)
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));
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}
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UInt32 num = 0;
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int len = bytes.Length;
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try
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{
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if (isLowNumHigh)
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{
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for (var i = 0; i < len; i++)
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{
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num += Convert.ToUInt32((UInt32)bytes[len - 1 - i] << (i << 3));
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}
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}
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else
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{
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for (var i = 0; i < len; i++)
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{
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num += Convert.ToUInt32((UInt32)bytes[i] << ((int)(len - 1 - i) << 3));
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}
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}
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return num;
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}
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catch (Exception error)
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{
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return new(error);
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}
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}
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/// <summary>
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/// [TODO:description]
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/// </summary>
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/// <param name="uintArray">[TODO:parameter]</param>
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/// <returns>[TODO:return]</returns>
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public static Result<byte[]> UInt32ArrayToBytes(UInt32[] uintArray)
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{
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byte[] byteArray = new byte[uintArray.Length * 4];
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try
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{
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Buffer.BlockCopy(uintArray, 0, byteArray, 0, uintArray.Length * 4);
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return byteArray;
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}
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catch (Exception error)
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{
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return new(error);
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}
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}
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/// <summary>
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/// 比特合并成二进制字节
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/// </summary>
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/// <param name="bits1">第一个比特值</param>
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/// <param name="bits1Len">第一个比特值的长度（位数）</param>
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/// <param name="bits2">第二个比特值</param>
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/// <param name="bits2Len">第二个比特值的长度（位数）</param>
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/// <returns>合并后的二进制字节数组</returns>
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public static Result<byte[]> MultiBitsToBytes(ulong bits1, uint bits1Len, ulong bits2, uint bits2Len)
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{
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return NumberToBytes(MultiBitsToNumber(bits1, bits1Len, bits2, bits2Len).Value,
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(bits1Len + bits2Len) % 8 != 0 ? (bits1Len + bits2Len) / 8 + 1 : (bits1Len + bits2Len) / 8);
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}
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/// <summary>
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/// 比特合并成整型
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/// </summary>
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/// <param name="bits1">第一个比特值</param>
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/// <param name="bits1Len">第一个比特值的长度（位数）</param>
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/// <param name="bits2">第二个比特值</param>
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/// <param name="bits2Len">第二个比特值的长度（位数）</param>
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/// <returns>合并后的整型值</returns>
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public static Result<ulong> MultiBitsToNumber(ulong bits1, uint bits1Len, ulong bits2, uint bits2Len)
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{
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if (bits1Len + bits2Len > 64) return new(new ArgumentException("Two Bits is more than 64 bits"));
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ulong num = (bits1 << Convert.ToInt32(bits2Len)) | bits2;
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return num;
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}
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/// <summary>
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/// 比特合并成整型
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/// </summary>
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/// <param name="bits1">第一个比特值</param>
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/// <param name="bits1Len">第一个比特值的长度（位数）</param>
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/// <param name="bits2">第二个比特值</param>
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/// <param name="bits2Len">第二个比特值的长度（位数）</param>
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/// <returns>合并后的整型值</returns>
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public static Result<uint> MultiBitsToNumber(uint bits1, uint bits1Len, uint bits2, uint bits2Len)
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{
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if (bits1Len + bits2Len > 64) return new(new ArgumentException("Two Bits is more than 64 bits"));
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uint num = (bits1 << Convert.ToInt32(bits2Len)) | bits2;
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return num;
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}
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/// <summary>
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/// 比特位检查
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/// </summary>
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/// <param name="srcBits">源比特值</param>
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/// <param name="dstBits">目标比特值</param>
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/// <param name="mask">掩码（默认为全1）</param>
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/// <returns>检查结果（是否匹配）</returns>
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public static bool BitsCheck(ulong srcBits, ulong dstBits, ulong mask = 0xFFFF_FFFF_FFFF_FFFF)
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{
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return (srcBits & mask) == dstBits;
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}
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/// <summary>
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/// 比特位检查
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/// </summary>
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/// <param name="srcBits">源比特值</param>
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/// <param name="dstBits">目标比特值</param>
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/// <param name="mask">掩码（默认为全1）</param>
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/// <returns>检查结果（是否匹配）</returns>
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public static bool BitsCheck(uint srcBits, uint dstBits, uint mask = 0xFFFF_FFFF)
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{
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return (srcBits & mask) == dstBits;
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}
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/// <summary>
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/// 获取整型对应位置的比特
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/// </summary>
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/// <param name="srcBits">整型数字</param>
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/// <param name="location">位置</param>
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/// <returns>比特</returns>
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public static Result<bool> ToBit(UInt32 srcBits, int location)
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{
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if (location < 0)
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return new(new ArgumentException(
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"Location can't be negetive", nameof(location)));
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return ((srcBits >> location) & ((UInt32)0b1)) == 1;
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}
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/// <summary>
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/// 将BitArray转化为32bits无符号整型
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/// </summary>
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/// <param name="bits">BitArray比特数组</param>
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/// <returns>32bits无符号整型</returns>
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public static Result<UInt32> BitsToNumber(BitArray bits)
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{
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if (bits.Length > 32)
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throw new ArgumentException("Argument length shall be at most 32 bits.");
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var array = new UInt32[1];
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bits.CopyTo(array, 0);
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return array[0];
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}
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/// <summary>
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/// 字符串转二进制字节数组
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/// </summary>
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/// <param name="str">输入的字符串</param>
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/// <param name="numBase">进制（默认为16进制）</param>
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/// <returns>转换后的二进制字节数组</returns>
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public static byte[] StringToBytes(string str, int numBase = 16)
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{
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var len = str.Length;
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var bytesLen = len / 2;
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var bytes = new byte[bytesLen];
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for (var i = 0; i < bytesLen; i++)
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{
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bytes[i] = Convert.ToByte(str.Substring(i * 2, 2), 16);
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}
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return bytes;
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}
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/// <summary>
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/// 反转字节数组中的子数组
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/// </summary>
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/// <param name="srcBytes">源字节数组</param>
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/// <param name="distance">子数组的长度（反转的步长）</param>
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/// <returns>反转后的字节数组</returns>
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public static Result<byte[]> ReverseBytes(byte[] srcBytes, int distance)
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{
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if (distance <= 0)
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return new(new ArgumentException("Distance can't be negetive", nameof(distance)));
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var srcBytesLen = srcBytes.Length;
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if (distance > srcBytesLen)
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return new(new ArgumentException(
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"Distance is larger than bytesArray", nameof(distance)));
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if (srcBytesLen % distance != 0)
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return new(new ArgumentException(
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"The length of bytes can't be divided by distance without reminder", nameof(distance)));
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var dstBytes = new byte[srcBytesLen];
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var buffer = new byte[distance];
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for (int i = 0; i < srcBytesLen; i += distance)
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{
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var end = i + distance;
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buffer = srcBytes[i..end];
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Array.Reverse(buffer);
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Array.Copy(buffer, 0, dstBytes, i, distance);
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}
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return dstBytes;
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}
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/// <summary>
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/// 反转字节内比特顺序（使用查找表的方法）
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/// </summary>
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/// <param name="srcByte">字节</param>
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/// <returns>反转后的字节</returns>
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public static byte ReverseBits(byte srcByte)
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{
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return BitReverseTable[srcByte];
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}
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/// <summary>
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/// 反转字节数组的字节内比特顺序（使用查找表的方法）
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/// </summary>
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/// <param name="srcBytes">字节数组</param>
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/// <returns>反转后的字节字节数组</returns>
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public static byte[] ReverseBits(byte[] srcBytes)
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{
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var bytesLen = srcBytes.Length;
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var dstBytes = new byte[bytesLen];
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for (int i = 0; i < bytesLen; i++)
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{
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dstBytes[i] = BitReverseTable[srcBytes[i]];
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}
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return dstBytes;
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}
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}
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/// <summary>
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/// 字符串处理工具
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/// </summary>
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public class String
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{
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/// <summary>
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/// 反转字符串
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/// </summary>
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/// <param name="s">输入的字符串</param>
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/// <returns>反转后的字符串</returns>
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public static string Reverse(string s)
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{
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char[] charArray = s.ToCharArray();
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Array.Reverse(charArray);
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return new string(charArray);
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}
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}
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/// <summary>
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/// 图像处理工具
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/// </summary>
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public class Image
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{
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/// <summary>
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/// 将 RGB565 格式转换为 RGB24 格式
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/// RGB565: 5位红色 + 6位绿色 + 5位蓝色 = 16位 (2字节)
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/// RGB24: 8位红色 + 8位绿色 + 8位蓝色 = 24位 (3字节)
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/// </summary>
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/// <param name="rgb565Data">RGB565格式的原始数据</param>
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/// <param name="width">图像宽度</param>
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/// <param name="height">图像高度</param>
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/// <param name="isLittleEndian">是否为小端序（默认为true）</param>
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/// <returns>RGB24格式的转换后数据</returns>
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public static Result<byte[]> ConvertRGB565ToRGB24(byte[] rgb565Data, int width, int height, bool isLittleEndian = true)
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{
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if (rgb565Data == null)
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return new(new ArgumentNullException(nameof(rgb565Data)));
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if (width <= 0 || height <= 0)
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return new(new ArgumentException("Width and height must be positive"));
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// 计算像素数量
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var expectedPixelCount = width * height;
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var actualPixelCount = rgb565Data.Length / 2;
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if (actualPixelCount < expectedPixelCount)
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{
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return new(new ArgumentException(
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$"RGB565 data length insufficient. Expected: {expectedPixelCount * 2} bytes, Actual: {rgb565Data.Length} bytes"));
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}
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try
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{
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var pixelCount = Math.Min(actualPixelCount, expectedPixelCount);
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var rgb24Data = new byte[pixelCount * 3];
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for (int i = 0; i < pixelCount; i++)
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{
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// 读取 RGB565 数据
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var rgb565Index = i * 2;
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if (rgb565Index + 1 >= rgb565Data.Length) break;
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// 组合成16位值
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UInt16 rgb565;
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if (isLittleEndian)
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{
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rgb565 = (UInt16)(rgb565Data[rgb565Index] | (rgb565Data[rgb565Index + 1] << 8));
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}
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else
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{
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rgb565 = (UInt16)((rgb565Data[rgb565Index] << 8) | rgb565Data[rgb565Index + 1]);
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}
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// 提取各颜色分量
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var r5 = (rgb565 >> 11) & 0x1F; // 高5位为红色
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||
var g6 = (rgb565 >> 5) & 0x3F; // 中间6位为绿色
|
||
var b5 = rgb565 & 0x1F; // 低5位为蓝色
|
||
|
||
// 转换为8位颜色值
|
||
var r8 = (byte)((r5 * 255) / 31); // 5位扩展到8位
|
||
var g8 = (byte)((g6 * 255) / 63); // 6位扩展到8位
|
||
var b8 = (byte)((b5 * 255) / 31); // 5位扩展到8位
|
||
|
||
// 存储到 RGB24 数组
|
||
var rgb24Index = i * 3;
|
||
rgb24Data[rgb24Index] = r8; // R
|
||
rgb24Data[rgb24Index + 1] = g8; // G
|
||
rgb24Data[rgb24Index + 2] = b8; // B
|
||
}
|
||
|
||
return rgb24Data;
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return new(ex);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将 RGB24 格式转换为 RGB565 格式
|
||
/// RGB24: 8位红色 + 8位绿色 + 8位蓝色 = 24位 (3字节)
|
||
/// RGB565: 5位红色 + 6位绿色 + 5位蓝色 = 16位 (2字节)
|
||
/// </summary>
|
||
/// <param name="rgb24Data">RGB24格式的原始数据</param>
|
||
/// <param name="width">图像宽度</param>
|
||
/// <param name="height">图像高度</param>
|
||
/// <param name="isLittleEndian">是否为小端序（默认为true）</param>
|
||
/// <returns>RGB565格式的转换后数据</returns>
|
||
public static Result<byte[]> ConvertRGB24ToRGB565(byte[] rgb24Data, int width, int height, bool isLittleEndian = true)
|
||
{
|
||
if (rgb24Data == null)
|
||
return new(new ArgumentNullException(nameof(rgb24Data)));
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return new(new ArgumentException("Width and height must be positive"));
|
||
|
||
var expectedPixelCount = width * height;
|
||
var actualPixelCount = rgb24Data.Length / 3;
|
||
|
||
if (actualPixelCount < expectedPixelCount)
|
||
{
|
||
return new(new ArgumentException(
|
||
$"RGB24 data length insufficient. Expected: {expectedPixelCount * 3} bytes, Actual: {rgb24Data.Length} bytes"));
|
||
}
|
||
|
||
try
|
||
{
|
||
var pixelCount = Math.Min(actualPixelCount, expectedPixelCount);
|
||
var rgb565Data = new byte[pixelCount * 2];
|
||
|
||
for (int i = 0; i < pixelCount; i++)
|
||
{
|
||
var rgb24Index = i * 3;
|
||
if (rgb24Index + 2 >= rgb24Data.Length) break;
|
||
|
||
// 读取 RGB24 数据
|
||
var r8 = rgb24Data[rgb24Index];
|
||
var g8 = rgb24Data[rgb24Index + 1];
|
||
var b8 = rgb24Data[rgb24Index + 2];
|
||
|
||
// 转换为5位、6位、5位
|
||
var r5 = (UInt16)((r8 * 31) / 255);
|
||
var g6 = (UInt16)((g8 * 63) / 255);
|
||
var b5 = (UInt16)((b8 * 31) / 255);
|
||
|
||
// 组合成16位值
|
||
var rgb565 = (UInt16)((r5 << 11) | (g6 << 5) | b5);
|
||
|
||
// 存储到 RGB565 数组
|
||
var rgb565Index = i * 2;
|
||
if (isLittleEndian)
|
||
{
|
||
rgb565Data[rgb565Index] = (byte)(rgb565 & 0xFF);
|
||
rgb565Data[rgb565Index + 1] = (byte)(rgb565 >> 8);
|
||
}
|
||
else
|
||
{
|
||
rgb565Data[rgb565Index] = (byte)(rgb565 >> 8);
|
||
rgb565Data[rgb565Index + 1] = (byte)(rgb565 & 0xFF);
|
||
}
|
||
}
|
||
|
||
return rgb565Data;
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return new(ex);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将 RGB24 数据转换为 JPEG 格式
|
||
/// </summary>
|
||
/// <param name="rgb24Data">RGB24格式的图像数据</param>
|
||
/// <param name="width">图像宽度</param>
|
||
/// <param name="height">图像高度</param>
|
||
/// <param name="quality">JPEG质量（1-100，默认80）</param>
|
||
/// <returns>JPEG格式的字节数组</returns>
|
||
public static Result<byte[]> ConvertRGB24ToJpeg(byte[] rgb24Data, int width, int height, int quality = 80)
|
||
{
|
||
if (rgb24Data == null)
|
||
return new(new ArgumentNullException(nameof(rgb24Data)));
|
||
|
||
if (width <= 0 || height <= 0)
|
||
return new(new ArgumentException("Width and height must be positive"));
|
||
|
||
if (quality < 1 || quality > 100)
|
||
return new(new ArgumentException("Quality must be between 1 and 100"));
|
||
|
||
var expectedDataLength = width * height * 3;
|
||
if (rgb24Data.Length < expectedDataLength)
|
||
{
|
||
return new(new ArgumentException(
|
||
$"RGB24 data length insufficient. Expected: {expectedDataLength} bytes, Actual: {rgb24Data.Length} bytes"));
|
||
}
|
||
|
||
try
|
||
{
|
||
using var image = new SixLabors.ImageSharp.Image<Rgb24>(width, height);
|
||
|
||
// 将 RGB 数据复制到 ImageSharp 图像
|
||
for (int y = 0; y < height; y++)
|
||
{
|
||
for (int x = 0; x < width; x++)
|
||
{
|
||
int index = (y * width + x) * 3;
|
||
if (index + 2 < rgb24Data.Length)
|
||
{
|
||
var pixel = new Rgb24(rgb24Data[index], rgb24Data[index + 1], rgb24Data[index + 2]);
|
||
image[x, y] = pixel;
|
||
}
|
||
}
|
||
}
|
||
|
||
using var stream = new MemoryStream();
|
||
image.SaveAsJpeg(stream, new JpegEncoder { Quality = quality });
|
||
return stream.ToArray();
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return new(ex);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将 RGB565 数据直接转换为 JPEG 格式
|
||
/// </summary>
|
||
/// <param name="rgb565Data">RGB565格式的图像数据</param>
|
||
/// <param name="width">图像宽度</param>
|
||
/// <param name="height">图像高度</param>
|
||
/// <param name="quality">JPEG质量（1-100，默认80）</param>
|
||
/// <param name="isLittleEndian">是否为小端序（默认为true）</param>
|
||
/// <returns>JPEG格式的字节数组</returns>
|
||
public static Result<byte[]> ConvertRGB565ToJpeg(byte[] rgb565Data, int width, int height, int quality = 80, bool isLittleEndian = true)
|
||
{
|
||
// 先转换为RGB24
|
||
var rgb24Result = ConvertRGB565ToRGB24(rgb565Data, width, height, isLittleEndian);
|
||
if (!rgb24Result.IsSuccessful)
|
||
{
|
||
return new(rgb24Result.Error);
|
||
}
|
||
|
||
// 再转换为JPEG
|
||
return ConvertRGB24ToJpeg(rgb24Result.Value, width, height, quality);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 创建 MJPEG 帧头部
|
||
/// </summary>
|
||
/// <param name="frameDataLength">帧数据长度</param>
|
||
/// <param name="boundary">边界字符串（默认为"--boundary"）</param>
|
||
/// <returns>MJPEG帧头部字节数组</returns>
|
||
public static byte[] CreateMjpegFrameHeader(int frameDataLength, string boundary = "--boundary")
|
||
{
|
||
var header = $"{boundary}\r\nContent-Type: image/jpeg\r\nContent-Length: {frameDataLength}\r\n\r\n";
|
||
return Encoding.ASCII.GetBytes(header);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 创建 MJPEG 帧尾部
|
||
/// </summary>
|
||
/// <returns>MJPEG帧尾部字节数组</returns>
|
||
public static byte[] CreateMjpegFrameFooter()
|
||
{
|
||
return Encoding.ASCII.GetBytes("\r\n");
|
||
}
|
||
|
||
/// <summary>
|
||
/// 创建完整的 MJPEG 帧数据
|
||
/// </summary>
|
||
/// <param name="jpegData">JPEG数据</param>
|
||
/// <param name="boundary">边界字符串（默认为"--boundary"）</param>
|
||
/// <returns>完整的MJPEG帧数据</returns>
|
||
public static Result<byte[]> CreateMjpegFrame(byte[] jpegData, string boundary = "--boundary")
|
||
{
|
||
if (jpegData == null)
|
||
return new(new ArgumentNullException(nameof(jpegData)));
|
||
|
||
try
|
||
{
|
||
var header = CreateMjpegFrameHeader(jpegData.Length, boundary);
|
||
var footer = CreateMjpegFrameFooter();
|
||
|
||
var totalLength = header.Length + jpegData.Length + footer.Length;
|
||
var frameData = new byte[totalLength];
|
||
|
||
var offset = 0;
|
||
Array.Copy(header, 0, frameData, offset, header.Length);
|
||
offset += header.Length;
|
||
|
||
Array.Copy(jpegData, 0, frameData, offset, jpegData.Length);
|
||
offset += jpegData.Length;
|
||
|
||
Array.Copy(footer, 0, frameData, offset, footer.Length);
|
||
|
||
return frameData;
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return new(ex);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 验证图像数据长度是否正确
|
||
/// </summary>
|
||
/// <param name="data">图像数据</param>
|
||
/// <param name="width">图像宽度</param>
|
||
/// <param name="height">图像高度</param>
|
||
/// <param name="bytesPerPixel">每像素字节数</param>
|
||
/// <returns>验证结果</returns>
|
||
public static bool ValidateImageDataLength(byte[] data, int width, int height, int bytesPerPixel)
|
||
{
|
||
if (data == null || width <= 0 || height <= 0 || bytesPerPixel <= 0)
|
||
return false;
|
||
|
||
var expectedLength = width * height * bytesPerPixel;
|
||
return data.Length >= expectedLength;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 获取图像格式信息
|
||
/// </summary>
|
||
/// <param name="format">图像格式枚举</param>
|
||
/// <returns>格式信息</returns>
|
||
public static ImageFormatInfo GetImageFormatInfo(ImageFormat format)
|
||
{
|
||
return format switch
|
||
{
|
||
ImageFormat.RGB565 => new ImageFormatInfo("RGB565", 2, "16-bit RGB format (5R+6G+5B)"),
|
||
ImageFormat.RGB24 => new ImageFormatInfo("RGB24", 3, "24-bit RGB format (8R+8G+8B)"),
|
||
ImageFormat.RGBA32 => new ImageFormatInfo("RGBA32", 4, "32-bit RGBA format (8R+8G+8B+8A)"),
|
||
ImageFormat.Grayscale8 => new ImageFormatInfo("Grayscale8", 1, "8-bit grayscale format"),
|
||
_ => new ImageFormatInfo("Unknown", 0, "Unknown image format")
|
||
};
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 图像格式枚举
|
||
/// </summary>
|
||
public enum ImageFormat
|
||
{
|
||
RGB565,
|
||
RGB24,
|
||
RGBA32,
|
||
Grayscale8
|
||
}
|
||
|
||
/// <summary>
|
||
/// 图像格式信息
|
||
/// </summary>
|
||
public record ImageFormatInfo(string Name, int BytesPerPixel, string Description);
|
||
}
|