[Ffmpeg-devel] Eliminating some memcpy() & memory allocations from the v4l2 input (original) (raw)

François Revol revol
Wed Feb 1 16:25:58 CET 2006

So, my idea is to avoid dinamically allocating the memory for the packet, and to set pkt->data = . VIDIOCQBUF will be called only when libavformat does not need the packet anymore, and I am planning to use the destruct() method of AVPacket for this. Does this usage of AVPacket (and of its destruct() method) make sense? Or am I misunderstanding its purpose?

You could add some args to av_new_packet(), or an extended version like: av_new_packet_dest(void *data, void (*destruct)(void *, void *), void * cookie);

and keep the cookie in AVPacket, then call destruct() with both data and cookie. So you can pass the fd to ioctl() in the cookie.

Fran?ois.

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