diff options
author | Justin Ruggles <justin.ruggles@gmail.com> | 2012-09-23 14:49:26 -0400 |
---|---|---|
committer | Justin Ruggles <justin.ruggles@gmail.com> | 2012-12-05 11:23:37 -0500 |
commit | f96f1e06a47ebd124dd0b1369f3fdd0f8f25d773 (patch) | |
tree | 409a426308dbda9188acbdaabd446b11aedf3204 /libavfilter/x86/af_volume.asm | |
parent | b384e031daeb1ac612620985e3e5377bc587559c (diff) |
x86: af_volume: add SSE2-optimized s16 volume scaling
Diffstat (limited to 'libavfilter/x86/af_volume.asm')
-rw-r--r-- | libavfilter/x86/af_volume.asm | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libavfilter/x86/af_volume.asm b/libavfilter/x86/af_volume.asm new file mode 100644 index 0000000000..922ad5dcc4 --- /dev/null +++ b/libavfilter/x86/af_volume.asm @@ -0,0 +1,56 @@ +;***************************************************************************** +;* x86-optimized functions for volume filter +;* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> +;* +;* This file is part of Libav. +;* +;* Libav 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. +;* +;* Libav 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 Libav; if not, write to the Free Software +;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +;****************************************************************************** + +%include "libavutil/x86/x86inc.asm" + +SECTION_RODATA 32 + +pw_1: times 8 dw 1 +pw_128: times 8 dw 128 + +SECTION_TEXT + +;------------------------------------------------------------------------------ +; void ff_scale_samples_s16(uint8_t *dst, const uint8_t *src, int len, +; int volume) +;------------------------------------------------------------------------------ + +INIT_XMM sse2 +cglobal scale_samples_s16, 4,4,4, dst, src, len, volume + movd m0, volumem + pshuflw m0, m0, 0 + punpcklwd m0, [pw_1] + mova m1, [pw_128] + lea lenq, [lend*2-mmsize] +.loop: + ; dst[i] = av_clip_int16((src[i] * volume + 128) >> 8); + mova m2, [srcq+lenq] + punpcklwd m3, m2, m1 + punpckhwd m2, m1 + pmaddwd m3, m0 + pmaddwd m2, m0 + psrad m3, 8 + psrad m2, 8 + packssdw m3, m2 + mova [dstq+lenq], m3 + sub lenq, mmsize + jge .loop + REP_RET |