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| author | Christophe Gisquet <christophe.gisquet@gmail.com> | 2015-10-12 19:37:47 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-10-13 13:32:21 +0200 |
| commit | 4369b9dc7b2b0da594223ce46615ba8e2b4cead6 (patch) | |
| tree | a04bb2c4c7ae62a33568a0850a20cd63fea61d3e /libavcodec/x86/simple_idct10.asm | |
| parent | e652f69b354bc6b5819012979985794cfd2805c9 (diff) | |
| download | ffmpeg-4369b9dc7b2b0da594223ce46615ba8e2b4cead6.tar.gz | |
x86: simple_idct(_put): 10bits versions
Modeled from the prores version. Clips to [0;1023] and is bitexact.
Bitexactness requires to add offsets in different places compared to
prores or C, and makes the function approximately 2% slower.
For 16 frames of a DNxHD 4:2:2 10bits test sequence:
C: 60861 decicycles in idct, 1048205 runs, 371 skips
sse2: 27567 decicycles in idct, 1048216 runs, 360 skips
avx: 26272 decicycles in idct, 1048171 runs, 405 skips
The add version is not implemented, so the corresponding dsp
function is set to NULL to make it clear in a code executing it.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/x86/simple_idct10.asm')
| -rw-r--r-- | libavcodec/x86/simple_idct10.asm | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libavcodec/x86/simple_idct10.asm b/libavcodec/x86/simple_idct10.asm new file mode 100644 index 0000000000..3af2042f08 --- /dev/null +++ b/libavcodec/x86/simple_idct10.asm @@ -0,0 +1,58 @@ +;****************************************************************************** +;* x86-SIMD-optimized IDCT for prores +;* this is identical to "simple" IDCT written by Michael Niedermayer +;* except for the clip range +;* +;* Copyright (c) 2011 Ronald S. Bultje <rsbultje@gmail.com> +;* Copyright (c) 2015 Christophe Gisquet +;* +;* 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 +;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +;****************************************************************************** + +%include "libavutil/x86/x86util.asm" + +%if ARCH_X86_64 + +SECTION_RODATA + +cextern pw_16 +cextern pw_1023 +pd_round_12: times 4 dd 1<<(12-1) +pd_round_19: times 4 dd 1<<(19-1) + +%include "libavcodec/x86/simple_idct10_template.asm" + +section .text align=16 + +%macro idct_fn 0 +cglobal simple_idct10, 1, 1, 16 + IDCT_FN "", 12, "", 19 + RET + +cglobal simple_idct10_put, 3, 3, 16 + IDCT_FN "", 12, "", 19, 0, pw_1023 + RET +%endmacro + +INIT_XMM sse2 +idct_fn +%if HAVE_AVX_EXTERNAL +INIT_XMM avx +idct_fn +%endif + +%endif |