| Commit message (Collapse) | Author | Age |
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According to ISO 9899:1999 S 6.5.7/4:
The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated bits
are filled with zeros. If E1 has an unsigned type, the value of the
result is E1× 2^E2, reduced modulo one more than the maximum value
representable in the result type. If E1 has a signed type and
nonnegative value, and E1× 2^E2 is representable in the result type, then
that is the resulting value; otherwise, the behavior is undefined.
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in the ac3_fixed encoder.
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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There are several places where a buffer is byte-swapped in 16-bit units.
This allows them to share code which can be optimised for various
architectures.
Signed-off-by: Mans Rullgard <mans@mansr.com>
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It is pretty hopeless that other considerable projects will adopt
libavutil alone in other projects. Projects that need small footprint
are better off with more specialized libraries such as gnulib or rather
just copy the necessary parts that they need. With this in mind, nobody
is helped by having libavutil and libavcore split. In order to ease
maintenance inside and around FFmpeg and to reduce confusion where to
put common code, avcore's functionality is merged (back) to avutil.
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
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This will be beneficial for use with the audio conversion API without
requiring it to depend on all of dsputil.
Signed-off-by: Mans Rullgard <mans@mansr.com>
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DSPContext.vector_fmul_window()
DCADSPContext.lfe_fir()
SynthFilterContext.synth_filter_float()
Signed-off-by: Mans Rullgard <mans@mansr.com>
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From ~780 cycles to 551 cycles, mostly just by using libc memcpy()
instead of manually shuffling individual bytes around.
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Originally committed as revision 26272 to svn://svn.ffmpeg.org/ffmpeg/trunk
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and deprecate the old function.
Originally committed as revision 25064 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This removes duplicated definitions of 8x8 and 16x16 fullpel MC
functions with various names reducing dsputil.o by 8k on x86_64.
Originally committed as revision 24933 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 24921 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 24685 to svn://svn.ffmpeg.org/ffmpeg/trunk
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The ff_inverse table is used by FASTDIV macro, defined in libavutil, but up
to now the table was defined only in libavcodec.
After this change, the main copy of ff_inverse is part of libavutil (just
like FASTDIV), but if CONFIG_SMALL is unset, then a different copy is made
available to libavcodec, to avoid the performance penalty of using an
external look up table.
Dynamic linking works, because the libraries are linked with -Bsymbolic, so
the local copy of the symbol has priority over the external; static linking
works because the table is on a standalone object file in both libraries,
so the linker is able to discard one of the two.
Tested on Linux/x86-64 and Mac OS X/x86-64.
Originally committed as revision 24383 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 24170 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23845 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by Eli Friedman, eli D friedman A gmail
Originally committed as revision 23826 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This isn't useful for the C functions, but will allow re-using H and V functions
for HV functions without adding separate H and V wrappers.
Originally committed as revision 23782 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Patch by David Conrad <lessen42 gmail com> and myself.
Originally committed as revision 23719 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23348 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23347 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.
Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
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2-4% faster overall decode
Originally committed as revision 22896 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This moves the H264-specific functions from DSPContext to the new
H264DSPContext. The code is made conditional on CONFIG_H264DSP
which is set by the codecs requiring it.
The qpel and chroma MC functions are not moved as these are used by
non-h264 code.
Originally committed as revision 22565 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This moves the DWT functions from snow.c and dsputil.c to a file of
their own. A new struct, DWTContext, holds the function pointers
previously part of DSPContext.
Originally committed as revision 22522 to svn://svn.ffmpeg.org/ffmpeg/trunk
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These casts are correct and safe. The pointers are guaranteed to
have proper alignment, and aliasing is not a problem with character
types.
Originally committed as revision 22446 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22265 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22264 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Also fix function definitions to match prototypes (missing const).
Originally committed as revision 22263 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22261 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22260 to svn://svn.ffmpeg.org/ffmpeg/trunk
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These macros are redundant. All uses are replaced with the generic
DECLARE_ALIGNED macro instead.
Originally committed as revision 22233 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21937 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21866 to svn://svn.ffmpeg.org/ffmpeg/trunk
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If DECLARE_ALIGNED_16 works on uint64_t it will work smaller types too.
Originally committed as revision 21863 to svn://svn.ffmpeg.org/ffmpeg/trunk
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inv_zigzag_direct16 16-byte aligned, so mark it appropriately.
Fixes encoder crashes e.g. with MPlayer's -vf lavc.
Originally committed as revision 21389 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 21377 to svn://svn.ffmpeg.org/ffmpeg/trunk
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all inlined, its small and horizontal & vertical versions are build out of
them. no change as gcc already did this.
Originally committed as revision 21333 to svn://svn.ffmpeg.org/ffmpeg/trunk
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