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0871ae1a93
This is more efficient as in practice the check is redundant most of the time. Callers which do not know if enough data is available have to check it with av_fifo_size(). Doing the check in *read() means the caller has no choice to skip the check when its known to be redundant. Also the return value was never documented in a public header so changing it should not break the API. Besides this fixes the case where read() failed on a 100% full fifo. Originally committed as revision 13404 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.