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