Performance optimizations for sbcenc utility
Performance optimizations for sbcenc utility

Read and write buffers sizes increased, memmove overhead eliminated.
Nonportable cast from 'unsigned char *' to 'struct au_header *' is
now also resolved as part of the changes.

mapfau/bluez,mapfau/bluez,mapfau/bluez,pkarasev3/bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,pkarasev3/bluez,pkarasev3/bluez,pkarasev3/bluez,ComputeCycles/bluez,silent-snowman/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,silent-snowman/bluez