mirror of https://git.ffmpeg.org/ffmpeg.git
75 lines
2.1 KiB
NASM
75 lines
2.1 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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;* Copyright (c) 2015 Christophe Gisquet
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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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cextern pw_2
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cextern pw_16
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cextern pw_1023
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cextern pw_4095
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pd_round_12: times 4 dd 1<<(12-1)
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pd_round_15: times 4 dd 1<<(15-1)
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pd_round_19: times 4 dd 1<<(19-1)
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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 simple_idct10, 1, 1, 16
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IDCT_FN "", 12, "", 19
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RET
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cglobal simple_idct10_put, 3, 3, 16
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IDCT_FN "", 12, "", 19, 0, pw_1023
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RET
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cglobal simple_idct12, 1, 1, 16
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; coeffs are already 15bits, adding the offset would cause
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; overflow in the input
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IDCT_FN "", 15, pw_2, 16
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RET
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cglobal simple_idct12_put, 3, 3, 16
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; range isn't known, so the C simple_idct range is used
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; Also, using a bias on input overflows, so use the bias
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; on output of the first butterfly instead
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IDCT_FN "", 15, pw_2, 16, 0, pw_4095
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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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