GCC does stupid things if these assignments are done using floats
directly, so fill the runs using integer operations instead. Also
unroll the loops since the length is always a multiple of 4.
Originally committed as revision 20077 to svn://svn.ffmpeg.org/ffmpeg/trunk
The src3 and step arguments to vector_fmul_add_add() are always zero
and one, respectively. This removes these arguments from the function,
simplifies the code accordingly, and renames the function to better
match the new operation.
Originally committed as revision 20061 to svn://svn.ffmpeg.org/ffmpeg/trunk
and change default type to float so that the run level
decoding functionality can be shared with wmapro
Originally committed as revision 19231 to svn://svn.ffmpeg.org/ffmpeg/trunk
Scaling (i)MDCT output has no runtime overhead and can be used to improve
performance of audio codecs. All the changes are only needed in
'ff_mdct_init' function and slow down initialization a bit.
Originally committed as revision 18855 to svn://svn.ffmpeg.org/ffmpeg/trunk
AVPacket argument rather than a const uint8_t *buf + int buf_size. This allows
passing of packet-specific flags from demuxer to decoder, such as the keyframe
flag, which appears necessary to playback corePNG P-frames.
Patch by Thilo Borgmann thilo.borgmann googlemail com, see also the thread
"Google Summer of Code participation" on the mailinglist.
Originally committed as revision 18351 to svn://svn.ffmpeg.org/ffmpeg/trunk
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.
Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
sure we actually consume exactly that amount.
Fixes sound artefacts (mostly blips) that mysteriously disappeared
after e.g. remuxing with mencoder.
Originally committed as revision 11115 to svn://svn.ffmpeg.org/ffmpeg/trunk
Patch by Ian Braithwaite ian braithwaite dot dk
[Ffmpeg-devel] WMA decoder improvement, 2007-03-28 15:50
Originally committed as revision 8627 to svn://svn.ffmpeg.org/ffmpeg/trunk
Patch by Ian Braithwaite ian .. braithwaite . dk
[Ffmpeg-devel] WMA decoder speedup 2007-03-22 22:56
Originally committed as revision 8526 to svn://svn.ffmpeg.org/ffmpeg/trunk
No measureable change in speed. This gave random crashes on Win32
and BeOS. The cause for this bug is that gcc doesn't align the
stackframe. Linux and glibc always ensure this to be true thus
this never affected Linux.
Originally committed as revision 7318 to svn://svn.ffmpeg.org/ffmpeg/trunk
Does not make a difference with any of my samples, but current
code does not make much sense.
Originally committed as revision 5533 to svn://svn.ffmpeg.org/ffmpeg/trunk
fix coverity warning CID: 255 (uninitalized variable used to build tables which arent used, well there is a slight change of a FPU exception maybe ...)
(by michael)
Init simplification and 2% faster wma_decode_block on amd64 with tables use
instead of pow(). (by banan)
the init simplifictaion is not correct its not binary identical
the pow optimization breaks decoding of http://klif-e.mos.net.au/videos/extr.wmv
Originally committed as revision 5247 to svn://svn.ffmpeg.org/ffmpeg/trunk
Måns Rullgård
Diego Biurrun
Sascha Sommer
Siarhei Siamashka
Michael Niedermayer
Thilo Borgmann
Loren Merritt
Peter Ross
Stefano Sabatini
Reimar Döffinger
Aurelien Jacobs
Alex Beregszaszi
Ramiro Polla
Ian Braithwaite
Michel Bardiaux
Benjamin Larsson
Luca Barbato
Baptiste Coudurier