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5c5b1731b7
This changes add_to_pktbuf() to maintain a pointer to the last entry in the list, avoiding a linear walk-through on each call. Before this change, add_to_pktbuf() could take a significant amount of time (10% of total decoding time), even with input files of several minutes. After the change, the time spent in this function is barely measurable with oprofile. Originally committed as revision 14654 to svn://svn.ffmpeg.org/ffmpeg/trunk
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * Read the file COPYING.LGPL. FFmpeg and the associated libraries EXCEPT for libpostproc and libswscale are licensed under the GNU Lesser General Public License. * libpostproc and libswscale are distributed under the GNU General Public License, see the file COPYING.GPL for details. Their compilation and use in FFmpeg is optional. * The file libavcodec/i386/idct_mmx.c is distributed under the GNU General Public License. It is strictly an optimization and its use is optional. * The file libavdevice/x11grab.c is distributed under the GNU General Public License. X11 grabbing is optional. * The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c are taken from libjpeg, see the top of the files for licensing details. * The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation Group with all rights reserved. It is only used to create a DCT test program and not compiled into libavcodec.