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覆巢之下焉有完卵。出来道上混,迟早是要还的。

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读取264文件时,寻找分隔0x03

2011-10-07 20:13:23| 分类： H264 | 标签： |举报 |字号大中小订阅

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在做RTP发送实时流前,要做一个测试,用一个从摄像头实时流编码得到的264文件来做模拟,面临读入文件的问题,要把文件中的0x03识别出来,

1晨不变(595024447) 19:54:55
在函数EBSPtoRBSP里

QQ群友提供了一个信息,所以

jm86

//ldecod/inc/defines.h

//Start code and Emulation Prevention need this to be defined in identical manner at encoder and decoder
#define ZEROBYTES_SHORTSTARTCODE 2 //indicates the number of zero bytes in the short start-code prefix

//ldecod\src\nal.c
int EBSPtoRBSP(byte *streamBuffer, int end_bytepos, int begin_bytepos)
{
int i, j, count;
count = 0;

if(end_bytepos < begin_bytepos)
    return end_bytepos;

j = begin_bytepos;

for(i = begin_bytepos; i < end_bytepos; i++)
{ //starting from begin_bytepos to avoid header information
    if(count == ZEROBYTES_SHORTSTARTCODE && streamBuffer[i] == 0x03)
    {
      i++;
      count = 0;
    }
    streamBuffer[j] = streamBuffer[i];
    if(streamBuffer[i] == 0x00)
      count++;
    else
      count = 0;
    j++;
}

return j;
}

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