MPEG2/TS流中PES报头中的PTS值如何计算
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解决时间 2021-04-02 07:31
- 提问者网友：火车头
- 2021-04-01 07:19
MPEG2/TS流中PES报头中的PTS值如何计算
最佳答案
- 五星知识达人网友：拾荒鲤
- 2021-04-01 08:42
#define MKWORd(h, l) (((h) << 8) | (l))
uint64 get_pts(uchar *buf)
{
uchar ptsflag;
uchar peshdr_datalen;
int index = 0;
ushort pktlen = MKWORd(buf[index], buf[index+1]);
index += sizeof(ushort);
index ++;
ptsflag = (buf[index] & 0xc0) >> 6;
index ++;
peshdr_datalen = buf[index++];
if (ptsflag & 0x2) {
uint64 pts;
ushort pts29_15, pts14_0;
unsigned uint64 pts32_30 = (buf[index] & 0x0e) >> 1;
index++;
pts29_15 = MKWORd(buf[index], buf[index+1] & 0xfe) >> 1;
index += 2;
pts14_0 = MAKE_WORd(buf[index], buf[index+1] & 0xfe) >> 1;
pts = (pts32_30 << 30) | (pts29_15 << 15) | pts14_0;
pts = pts / 90000;
return pts;
}
return 0;
}
#define MKWORd(h, l) (((h) << 8) | (l))
uint64 get_pts(uchar *buf)
{
uchar ptsflag;
uchar peshdr_datalen;
int index = 0;
ushort pktlen = MKWORd(buf[index], buf[index+1]);
index += sizeof(ushort);
index ++;
ptsflag = (buf[index] & 0xc0) >> 6;
index ++;
peshdr_datalen = buf[index++];
if (ptsflag & 0x2) {
uint64 pts;
ushort pts29_15, pts14_0;
unsigned uint64 pts32_30 = (buf[index] & 0x0e) >> 1;
index++;
pts29_15 = MKWORd(buf[index], buf[index+1] & 0xfe) >> 1;
index += 2;
pts14_0 = MAKE_WORd(buf[index], buf[index+1] & 0xfe) >> 1;
pts = (pts32_30 << 30) | (pts29_15 << 15) | pts14_0;
pts = pts / 90000;
return pts;
}
return 0;
}
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