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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-01-09 12:13:58 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-01-09 12:14:56 +0100 |
| commit | 75afbe2ab4a14cdfdc4001869ae67ded99cf5ce7 (patch) | |
| tree | a71971845a2b85bddf8bbcfe4227dd370341f000 /libavresample/x86/dither.asm | |
| parent | 34c1c08c665389daa190cb331e4d899da8dde57a (diff) | |
| parent | 1fb8f6a44f06e48386450fe0363aefc02583d24a (diff) | |
| download | ffmpeg-75afbe2ab4a14cdfdc4001869ae67ded99cf5ce7.tar.gz | |
Merge commit '1fb8f6a44f06e48386450fe0363aefc02583d24a'
* commit '1fb8f6a44f06e48386450fe0363aefc02583d24a':
x86: lavr: add SSE2 quantize() for dithering
doc/APIchanges: fill in missing dates and hashes.
rtpdec_vp8: Request a keyframe if RTP packets are lost
Conflicts:
doc/APIchanges
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavresample/x86/dither.asm')
| -rw-r--r-- | libavresample/x86/dither.asm | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libavresample/x86/dither.asm b/libavresample/x86/dither.asm new file mode 100644 index 0000000000..bfdc4e6907 --- /dev/null +++ b/libavresample/x86/dither.asm @@ -0,0 +1,53 @@ +;****************************************************************************** +;* x86 optimized dithering format conversion +;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> +;* +;* This file is part of FFmpeg. +;* +;* FFmpeg is free software; you can redistribute it and/or +;* modify it under the terms of the GNU Lesser General Public +;* License as published by the Free Software Foundation; either +;* version 2.1 of the License, or (at your option) any later version. +;* +;* FFmpeg is distributed in the hope that it will be useful, +;* but WITHOUT ANY WARRANTY; without even the implied warranty of +;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +;* Lesser General Public License for more details. +;* +;* You should have received a copy of the GNU Lesser General Public +;* License along with FFmpeg; if not, write to the Free Software +;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +;****************************************************************************** + +%include "libavutil/x86/x86util.asm" + +SECTION_RODATA 32 + +pf_s16_scale: times 4 dd 32753.0 + +SECTION_TEXT + +;------------------------------------------------------------------------------ +; void ff_quantize(int16_t *dst, float *src, float *dither, int len); +;------------------------------------------------------------------------------ + +INIT_XMM sse2 +cglobal quantize, 4,4,3, dst, src, dither, len + lea lenq, [2*lend] + add dstq, lenq + lea srcq, [srcq+2*lenq] + lea ditherq, [ditherq+2*lenq] + neg lenq + mova m2, [pf_s16_scale] +.loop: + mulps m0, m2, [srcq+2*lenq] + mulps m1, m2, [srcq+2*lenq+mmsize] + addps m0, [ditherq+2*lenq] + addps m1, [ditherq+2*lenq+mmsize] + cvtps2dq m0, m0 + cvtps2dq m1, m1 + packssdw m0, m1 + mova [dstq+lenq], m0 + add lenq, mmsize + jl .loop + REP_RET |