This makes no difference for supported input but avoids a
out of array read with input that is never passed in currently
Fixes CID717919
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Adding instead of subtracting the products in the loop allows the
compiler to generate more efficient multiply-accumulate instructions
when 16-bit multiply-subtract is not available. ARM has only
multiply-accumulate for 16-bit operands. In general, if only one
variant exists, it is usually accumulate rather than subtract.
In the same spirit, using the dedicated saturation function enables
use of any special optimised versions of this.
Signed-off-by: Mans Rullgard <mans@mansr.com>
AMR NB and WB decoders are optimized for MIPS architecture.
Appropriate Makefiles are changed accordingly.
Cnfigure script is changed in order to support optimizations.
Optimizations are enabled by default when compiling is done for
mips architecture.
Appropriate cflags are automatically set.
Support for several mips CPUs is added in configure script.
New ffmpeg options are added for disabling optimizations.
The FFMPEG option --disable-mipsfpu disables MIPS floating point
optimizations.
The FFMPEG option --disable-mips32r2 disables MIPS32R2
optimizations.
The FFMPEG option --disable-mipsdspr1 disables MIPS DSP ASE R1
optimizations.
The FFMPEG option --disable-mipsdspr2 disables MIPS DSP ASE R2
optimizations.
Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Reviewed-by: Vitor Sessak <vitor1001@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
"for (i = 1; i < num + 1; i++)" look like "for (i = 1; i <= num; i++)".
Programmers worldwide rejoiced and used the operand, e.g. in the thread
"[PATCH] remove ugliness in cel_filters.c", and He saw that it was good.
Originally committed as revision 20489 to svn://svn.ffmpeg.org/ffmpeg/trunk
convolution in the upcoming AMR-NB floating point decoder. The function scales
and adds a vector, that is lagged by some offset, to another vector with the
same number of elements.
Patch by Colin McQuillan ( m.niloc googlemail com )
Originally committed as revision 19634 to svn://svn.ffmpeg.org/ffmpeg/trunk
Michael Niedermayer
Martin Storsjö
Mans Rullgard
Mohamed Naufal Basheer
Nedeljko Babic
Alex Converse
Clément Bœsch
Vitor Sessak
Ronald S. Bultje
Colin McQuillan
Diego Biurrun
Kenan Gillet
Reynaldo H. Verdejo Pinochet