avconv: avoid memcpy in vsrc_buffer when possible.

Decoding Sintel.2010.1080p.mkv with 4 threads on an i7 2600K goes from
260s to 244s.
This commit is contained in:
Anton Khirnov 2011-12-21 21:04:05 +01:00
parent 64dca32cdf
commit 04a14d4d25