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100 lines
2.9 KiB
100 lines
2.9 KiB
;****************************************************************************** |
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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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%macro CONST_DEC 3 |
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const %1 |
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times 4 dw %2, %3 |
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%endmacro |
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%define W1sh2 22725 ; W1 = 90901 = 22725<<2 + 1 |
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%define W2sh2 21407 ; W2 = 85627 = 21407<<2 - 1 |
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%define W3sh2 19265 ; W3 = 77062 = 19265<<2 + 2 |
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%define W4sh2 16384 ; W4 = 65535 = 16384<<2 - 1 |
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%define W5sh2 12873 ; W5 = 51491 = 12873<<2 - 1 |
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%define W6sh2 8867 ; W6 = 35468 = 8867<<2 |
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%define W7sh2 4520 ; W7 = 18081 = 4520<<2 + 1 |
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CONST_DEC w4_plus_w2, W4sh2, +W2sh2 |
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CONST_DEC w4_min_w2, W4sh2, -W2sh2 |
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CONST_DEC w4_plus_w6, W4sh2, +W6sh2 |
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CONST_DEC w4_min_w6, W4sh2, -W6sh2 |
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CONST_DEC w1_plus_w3, W1sh2, +W3sh2 |
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CONST_DEC w3_min_w1, W3sh2, -W1sh2 |
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CONST_DEC w7_plus_w3, W7sh2, +W3sh2 |
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CONST_DEC w3_min_w7, W3sh2, -W7sh2 |
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CONST_DEC w1_plus_w5, W1sh2, +W5sh2 |
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CONST_DEC w5_min_w1, W5sh2, -W1sh2 |
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CONST_DEC w5_plus_w7, W5sh2, +W7sh2 |
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CONST_DEC w7_min_w5, W7sh2, -W5sh2 |
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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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