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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>
54 lines
1.5 KiB
NASM
54 lines
1.5 KiB
NASM
;******************************************************************************
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;* x86-SIMD-optimized IDCT for prores
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;* this is identical to "simple" IDCT written by Michael Niedermayer
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;* except for the clip range
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;*
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;* Copyright (c) 2011 Ronald S. Bultje <rsbultje@gmail.com>
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or
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;* modify it under the terms of the GNU Lesser General Public
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;* License as published by the Free Software Foundation; either
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;* version 2.1 of the License, or (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;* Lesser General Public License for more details.
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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with FFmpeg; if not, write to the Free Software
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;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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%if ARCH_X86_64
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SECTION_RODATA
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pw_88: times 8 dw 0x2008
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cextern pw_1
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cextern pw_4
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cextern pw_1019
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%include "libavcodec/x86/simple_idct10_template.asm"
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section .text align=16
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%macro idct_fn 0
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cglobal prores_idct_put_10, 4, 4, 15
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IDCT_FN pw_1, 15, pw_88, 18, pw_4, pw_1019, r3
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RET
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%endmacro
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INIT_XMM sse2
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idct_fn
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%if HAVE_AVX_EXTERNAL
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INIT_XMM avx
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idct_fn
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%endif
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%endif
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