Commit Graph

10 Commits

Author SHA1 Message Date
Ganesh Ajjanagadde
789ef087c6 avcodec/ppc/fdctdsp: use more accurate constants
Whoever wrote this stuff had a pretty bad libm - digits differ pretty
quickly.

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-12-01 19:05:19 -05:00
Ganesh Ajjanagadde
61a1ca13ea avcodec/ppc/fdctdsp: use M_SQRT2 instead of ad-hoc SQRT2
This actually fixes an incorrect float literal. It is believed by
examining the precision that the literals were all pre-computed as
floats, resulting in this needless loss of precision. There is no
benefit to keeping such reduced precision:
1. These constants are used for static array computation, hence
compile-time.
2. They will be treated as doubles anyway, since f specifier was not
present.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
2015-11-22 16:16:16 -05:00
Rong Yan
8a03d428f1 avcodec/ppc/fdctdsp: POWER LE support in ff_fdct_altivec() delete macros VEC_FMERGEH() VEC_FMERGEL(), they where wrong
GCC tool had a bug of PPC intrinsic interpret, which has been fixed in GCC 4.9.1. This bug lead to
errors in two of our previous patches. We found this when we update our GCC tools to 4.9.1 and by
reading the related info on GCC website. We fix our previous error in two separate commits

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-04-27 12:59:15 +02:00
Rong Yan
af5fec9538 avcodec/ppc/fdctdsp: POWER LE support in ff_fdct_altivec()
add marcos VEC_FMERGEH() VEC_FMERGEL()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-04-03 18:10:27 +02:00
Michael Niedermayer
5f1ea0bfc5 avcodec/ppc/fdctdsp: fix const warning
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-02-28 18:40:42 +01:00
Reimar Döffinger
d9e2aceb7f Add missing "const" all over the place.
Only "./configure --enable-gpl" on x86 was tested.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
2014-08-29 18:57:25 +02:00
Michael Niedermayer
7bdbd2653f Merge commit '1a583c0c60240adb8fa6620c6df33f1a0a0fe5d9'
* commit '1a583c0c60240adb8fa6620c6df33f1a0a0fe5d9':
  fdct: Move ppc-specific declarations to a header in the ppc directory

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-19 14:10:25 +02:00
Diego Biurrun
1a583c0c60 fdct: Move ppc-specific declarations to a header in the ppc directory 2014-07-19 02:38:22 -07:00
Michael Niedermayer
14e2406de7 Merge commit 'a9aee08d900f686e966c64afec5d88a7d9d130a3'
* commit 'a9aee08d900f686e966c64afec5d88a7d9d130a3':
  dsputil: Split off FDCT bits into their own context

Conflicts:
	configure
	libavcodec/Makefile
	libavcodec/asvenc.c
	libavcodec/dnxhdenc.c
	libavcodec/dsputil.c
	libavcodec/mpegvideo.h
	libavcodec/mpegvideo_enc.c
	libavcodec/x86/Makefile
	libavcodec/x86/dsputilenc_mmx.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-07-08 03:19:06 +02:00
Diego Biurrun
a9aee08d90 dsputil: Split off FDCT bits into their own context 2014-07-07 12:28:45 -07:00