mirror of https://git.ffmpeg.org/ffmpeg.git
217 lines
12 KiB
C
217 lines
12 KiB
C
/*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Author: Nedeljko Babic (nbabic@mips.com)
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*
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* various filters for ACELP-based codecs optimized for MIPS
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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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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Reference: libavcodec/acelp_filters.c
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*/
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavcodec/acelp_filters.h"
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#if HAVE_INLINE_ASM
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static void ff_acelp_interpolatef_mips(float *out, const float *in,
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const float *filter_coeffs, int precision,
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int frac_pos, int filter_length, int length)
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{
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int n, i;
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int prec = precision * 4;
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int fc_offset = precision - frac_pos;
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float in_val_p, in_val_m, fc_val_p, fc_val_m;
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for (n = 0; n < length; n++) {
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/**
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* four pointers are defined in order to minimize number of
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* computations done in inner loop
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*/
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const float *p_in_p = &in[n];
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const float *p_in_m = &in[n-1];
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const float *p_filter_coeffs_p = &filter_coeffs[frac_pos];
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const float *p_filter_coeffs_m = filter_coeffs + fc_offset;
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float v = 0;
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for (i = 0; i < filter_length;i++) {
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__asm__ volatile (
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"lwc1 %[in_val_p], 0(%[p_in_p]) \n\t"
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"lwc1 %[fc_val_p], 0(%[p_filter_coeffs_p]) \n\t"
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"lwc1 %[in_val_m], 0(%[p_in_m]) \n\t"
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"lwc1 %[fc_val_m], 0(%[p_filter_coeffs_m]) \n\t"
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"addiu %[p_in_p], %[p_in_p], 4 \n\t"
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"madd.s %[v],%[v], %[in_val_p],%[fc_val_p] \n\t"
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"addiu %[p_in_m], %[p_in_m], -4 \n\t"
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"addu %[p_filter_coeffs_p], %[p_filter_coeffs_p], %[prec] \n\t"
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"addu %[p_filter_coeffs_m], %[p_filter_coeffs_m], %[prec] \n\t"
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"madd.s %[v],%[v],%[in_val_m], %[fc_val_m] \n\t"
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: [v] "+&f" (v),[p_in_p] "+r" (p_in_p), [p_in_m] "+r" (p_in_m),
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[p_filter_coeffs_p] "+r" (p_filter_coeffs_p),
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[in_val_p] "=&f" (in_val_p), [in_val_m] "=&f" (in_val_m),
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[fc_val_p] "=&f" (fc_val_p), [fc_val_m] "=&f" (fc_val_m),
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[p_filter_coeffs_m] "+r" (p_filter_coeffs_m)
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: [prec] "r" (prec)
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: "memory"
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);
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}
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out[n] = v;
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}
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}
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static void ff_acelp_apply_order_2_transfer_function_mips(float *out, const float *in,
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const float zero_coeffs[2],
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const float pole_coeffs[2],
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float gain, float mem[2], int n)
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{
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/**
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* loop is unrolled eight times
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*/
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__asm__ volatile (
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"lwc1 $f0, 0(%[mem]) \n\t"
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"blez %[n], ff_acelp_apply_order_2_transfer_function_end%= \n\t"
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"lwc1 $f1, 4(%[mem]) \n\t"
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"lwc1 $f2, 0(%[pole_coeffs]) \n\t"
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"lwc1 $f3, 4(%[pole_coeffs]) \n\t"
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"lwc1 $f4, 0(%[zero_coeffs]) \n\t"
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"lwc1 $f5, 4(%[zero_coeffs]) \n\t"
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"ff_acelp_apply_order_2_transfer_function_madd%=: \n\t"
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"lwc1 $f6, 0(%[in]) \n\t"
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"mul.s $f9, $f3, $f1 \n\t"
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"mul.s $f7, $f2, $f0 \n\t"
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"msub.s $f7, $f7, %[gain], $f6 \n\t"
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"sub.s $f7, $f7, $f9 \n\t"
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"madd.s $f8, $f7, $f4, $f0 \n\t"
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"madd.s $f8, $f8, $f5, $f1 \n\t"
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"lwc1 $f11, 4(%[in]) \n\t"
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"mul.s $f12, $f3, $f0 \n\t"
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"mul.s $f13, $f2, $f7 \n\t"
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"msub.s $f13, $f13, %[gain], $f11 \n\t"
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"sub.s $f13, $f13, $f12 \n\t"
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"madd.s $f14, $f13, $f4, $f7 \n\t"
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"madd.s $f14, $f14, $f5, $f0 \n\t"
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"swc1 $f8, 0(%[out]) \n\t"
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"lwc1 $f6, 8(%[in]) \n\t"
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"mul.s $f9, $f3, $f7 \n\t"
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"mul.s $f15, $f2, $f13 \n\t"
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"msub.s $f15, $f15, %[gain], $f6 \n\t"
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"sub.s $f15, $f15, $f9 \n\t"
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"madd.s $f8, $f15, $f4, $f13 \n\t"
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"madd.s $f8, $f8, $f5, $f7 \n\t"
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"swc1 $f14, 4(%[out]) \n\t"
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"lwc1 $f11, 12(%[in]) \n\t"
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"mul.s $f12, $f3, $f13 \n\t"
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"mul.s $f16, $f2, $f15 \n\t"
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"msub.s $f16, $f16, %[gain], $f11 \n\t"
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"sub.s $f16, $f16, $f12 \n\t"
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"madd.s $f14, $f16, $f4, $f15 \n\t"
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"madd.s $f14, $f14, $f5, $f13 \n\t"
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"swc1 $f8, 8(%[out]) \n\t"
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"lwc1 $f6, 16(%[in]) \n\t"
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"mul.s $f9, $f3, $f15 \n\t"
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"mul.s $f7, $f2, $f16 \n\t"
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"msub.s $f7, $f7, %[gain], $f6 \n\t"
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"sub.s $f7, $f7, $f9 \n\t"
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"madd.s $f8, $f7, $f4, $f16 \n\t"
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"madd.s $f8, $f8, $f5, $f15 \n\t"
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"swc1 $f14, 12(%[out]) \n\t"
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"lwc1 $f11, 20(%[in]) \n\t"
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"mul.s $f12, $f3, $f16 \n\t"
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"mul.s $f13, $f2, $f7 \n\t"
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"msub.s $f13, $f13, %[gain], $f11 \n\t"
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"sub.s $f13, $f13, $f12 \n\t"
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"madd.s $f14, $f13, $f4, $f7 \n\t"
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"madd.s $f14, $f14, $f5, $f16 \n\t"
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"swc1 $f8, 16(%[out]) \n\t"
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"lwc1 $f6, 24(%[in]) \n\t"
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"mul.s $f9, $f3, $f7 \n\t"
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"mul.s $f15, $f2, $f13 \n\t"
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"msub.s $f15, $f15, %[gain], $f6 \n\t"
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"sub.s $f1, $f15, $f9 \n\t"
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"madd.s $f8, $f1, $f4, $f13 \n\t"
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"madd.s $f8, $f8, $f5, $f7 \n\t"
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"swc1 $f14, 20(%[out]) \n\t"
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"lwc1 $f11, 28(%[in]) \n\t"
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"mul.s $f12, $f3, $f13 \n\t"
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"mul.s $f16, $f2, $f1 \n\t"
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"msub.s $f16, $f16, %[gain], $f11 \n\t"
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"sub.s $f0, $f16, $f12 \n\t"
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"madd.s $f14, $f0, $f4, $f1 \n\t"
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"madd.s $f14, $f14, $f5, $f13 \n\t"
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"swc1 $f8, 24(%[out]) \n\t"
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"addiu %[out], 32 \n\t"
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"addiu %[in], 32 \n\t"
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"addiu %[n], -8 \n\t"
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"swc1 $f14, -4(%[out]) \n\t"
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"bnez %[n], ff_acelp_apply_order_2_transfer_function_madd%= \n\t"
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"swc1 $f1, 4(%[mem]) \n\t"
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"swc1 $f0, 0(%[mem]) \n\t"
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"ff_acelp_apply_order_2_transfer_function_end%=: \n\t"
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: [out] "+r" (out),
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[in] "+r" (in), [gain] "+f" (gain),
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[n] "+r" (n), [mem] "+r" (mem)
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: [zero_coeffs] "r" (zero_coeffs),
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[pole_coeffs] "r" (pole_coeffs)
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: "$f0", "$f1", "$f2", "$f3", "$f4", "$f5",
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"$f6", "$f7", "$f8", "$f9", "$f10", "$f11",
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"$f12", "$f13", "$f14", "$f15", "$f16", "memory"
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);
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}
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#endif /* HAVE_INLINE_ASM */
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void ff_acelp_filter_init_mips(ACELPFContext *c)
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{
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#if HAVE_INLINE_ASM
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c->acelp_interpolatef = ff_acelp_interpolatef_mips;
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c->acelp_apply_order_2_transfer_function = ff_acelp_apply_order_2_transfer_function_mips;
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#endif
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}
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