Hi,
On Mon, 2009-03-30 at 13:55 +0800, liangzhihong1984 wrote:
> Hi, everyone.
> I was learning how to write a plugin.
> when I study the source code of hdv1394src, some code really confused
> me.
>
> if (iec61883_mpeg2_recv_start (src->iec61883mpeg2, src->channel) !=
> 0)
> goto cannot_start;
> #if 0
> if (raw1394_start_iso_rcv (src->handle, src->channel) < 0)
> goto cannot_start;
> #endif
>
> So when should I use the iec61883_mpeg2_recv_start and when should
> raw1394_start_iso_rcv， can anybody explain?
raw1394_start_iso_rcv is for the lowest-level handling of firewire
data. But since we *know* we only are going to receive HDV we can use
the higher-level methods (iec61882). The '#if 0'd code is dead code.
Edward
>
> Thank you in advance.
> Best Regards,
> Leon Liang
>
>
>
>
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