首先对不起我的英语
通过使用C#
我正在尝试解码RTP A-法律包,但它给了我一个噪音,
我用wireshark代码检查了我的代码,可以使我的声音没有噪音,我无法得到wireshark代码(c ++)和我的代码(c#)之间的差异,这是因为我无法调试wireshark,但是我得到了以下差异:我的代码和wireshark代码
我将通过两个代码编写字节结果,并简化我的代码和wireshark
例如 :
当alaw_exp_table [data [i]] = -8时
在我的鳕鱼中,字节结果是:248,255
在wireshark代码中,字节结果为:255,248
您是否看到248,255:255,248,我认为这是一种反映,但下一个示例不是
当alaw_exp_table [data [i]] = 8时
在我的鳕鱼中,字节结果是:8,0
在Wireshark代码中,字节结果为:0,0
这个wireshark
int
decodeG711a(void *input, int inputSizeBytes, void *output, int *outputSizeBytes)
{
guint8 *dataIn = (guint8 *)input;
gint16 *dataOut = (gint16 *)output;
int i;
for (i=0; i<inputSizeBytes; i++)
{
dataOut[i] = alaw_exp_table[dataIn[i]];
}
*outputSizeBytes = inputSizeBytes * 2;
return 0;
}
static short[] alaw_exp_table= {
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944,
-30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136,
-11008,-10496,-12032,-11520, -8960, -8448, -9984, -9472,
-15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848,
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848};
这是我的代码
public static void ALawDecode(byte data, out byte[] decoded)
{
int size = data.Length;
decoded = new byte[size * 2];
for (int i = 0; i < size; i++)
{
//First byte is the less significant byte
decoded[2 * i] = (byte)(alaw_exp_table[data[i]] & 0xff);
//Second byte is the more significant byte
decoded[2 * i + 1] = (byte)(alaw_exp_table[data[i]] >> 8);
}
}
我的代码和Wireshark代码中的alaw_exp_table相同
请告诉我我的代码有什么问题吗?
提前致谢
最佳答案
您可能错误地处理了字节序。
尝试交换C#示例中的两个解码操作。例如:
decoded[2 * i + 1] = (byte)(alaw_exp_table[data[i]] & 0xff);
decoded[2 * i] = (byte)(alaw_exp_table[data[i]] >> 8);
关于c# - 解码RTP G,711 A-法律包问题,C#和c++之间的区别,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/4771099/