diff options
author | Bojan Zivkovic <bojan@mips.com> | 2013-03-06 17:55:06 +0400 |
---|---|---|
committer | Michael Niedermayer <michaelni@gmx.at> | 2013-03-20 15:44:32 +0400 |
commit | 7d29c6eebc428741004071f7a92ea37d8d1d2cce (patch) | |
tree | e4b09858dac4c966b304b00db59bcc802fdc0ef2 /libavcodec/mips | |
parent | 26f3924d782b6081ba76fd42c4d35af6ce8cde36 (diff) |
mips: Optimization of IIR filter function
Signed-off-by: Bojan Zivkovic <bojan@mips.com>
Reviewed-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/mips')
-rw-r--r-- | libavcodec/mips/Makefile | 1 | ||||
-rw-r--r-- | libavcodec/mips/iirfilter_mips.c | 204 |
2 files changed, 205 insertions, 0 deletions
diff --git a/libavcodec/mips/Makefile b/libavcodec/mips/Makefile index fa99d6d04f..a2ea412305 100644 --- a/libavcodec/mips/Makefile +++ b/libavcodec/mips/Makefile @@ -18,3 +18,4 @@ OBJS-$(CONFIG_AAC_DECODER) += mips/aacdec_mips.o \ mips/sbrdsp_mips.o \ mips/aacpsdsp_mips.o MIPSDSPR1-OBJS-$(CONFIG_AAC_ENCODER) += mips/aaccoder_mips.o +MIPSFPU-OBJS-$(CONFIG_AAC_ENCODER) += mips/iirfilter_mips.o diff --git a/libavcodec/mips/iirfilter_mips.c b/libavcodec/mips/iirfilter_mips.c new file mode 100644 index 0000000000..a5646cde8b --- /dev/null +++ b/libavcodec/mips/iirfilter_mips.c @@ -0,0 +1,204 @@ +/* + * 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: Bojan Zivkovic (bojan@mips.com) + * + * IIR filter optimized for MIPS floating-point architecture + * + * 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/iirfilter.c + */ + +#include "libavcodec/iirfilter.h" + +#if HAVE_INLINE_ASM +typedef struct FFIIRFilterCoeffs { + int order; + float gain; + int *cx; + float *cy; +} FFIIRFilterCoeffs; + +typedef struct FFIIRFilterState { + float x[1]; +} FFIIRFilterState; + +static void ff_iir_filter_flt_mips(const struct FFIIRFilterCoeffs *c, + struct FFIIRFilterState *s, int size, + const float *src, int sstep, float *dst, int dstep) +{ + if (c->order == 2) { + int i; + const float *src0 = src; + float *dst0 = dst; + for (i = 0; i < size; i++) { + float in = *src0 * c->gain + s->x[0] * c->cy[0] + s->x[1] * c->cy[1]; + *dst0 = s->x[0] + in + s->x[1] * c->cx[1]; + s->x[0] = s->x[1]; + s->x[1] = in; + src0 += sstep; + dst0 += dstep; + } + } else if (c->order == 4) { + int i; + const float *src0 = src; + float *dst0 = dst; + float four = 4.0; + float six = 6.0; + for (i = 0; i < size; i += 4) { + float in1, in2, in3, in4; + float res1, res2, res3, res4; + float *x = s->x; + float *cy = c->cy; + float gain = c->gain; + float src0_0 = src0[0 ]; + float src0_1 = src0[sstep ]; + float src0_2 = src0[2*sstep]; + float src0_3 = src0[3*sstep]; + + __asm__ volatile ( + "lwc1 $f0, 0(%[cy]) \n\t" + "lwc1 $f4, 0(%[x]) \n\t" + "lwc1 $f5, 4(%[x]) \n\t" + "lwc1 $f6, 8(%[x]) \n\t" + "lwc1 $f7, 12(%[x]) \n\t" + "mul.s %[in1], %[src0_0], %[gain] \n\t" + "mul.s %[in2], %[src0_1], %[gain] \n\t" + "mul.s %[in3], %[src0_2], %[gain] \n\t" + "mul.s %[in4], %[src0_3], %[gain] \n\t" + "lwc1 $f1, 4(%[cy]) \n\t" + "madd.s %[in1], %[in1], $f0, $f4 \n\t" + "madd.s %[in2], %[in2], $f0, $f5 \n\t" + "madd.s %[in3], %[in3], $f0, $f6 \n\t" + "madd.s %[in4], %[in4], $f0, $f7 \n\t" + "lwc1 $f2, 8(%[cy]) \n\t" + "madd.s %[in1], %[in1], $f1, $f5 \n\t" + "madd.s %[in2], %[in2], $f1, $f6 \n\t" + "madd.s %[in3], %[in3], $f1, $f7 \n\t" + "lwc1 $f3, 12(%[cy]) \n\t" + "add.s $f8, $f5, $f7 \n\t" + "madd.s %[in1], %[in1], $f2, $f6 \n\t" + "madd.s %[in2], %[in2], $f2, $f7 \n\t" + "mul.s $f9, $f6, %[six] \n\t" + "mul.s $f10, $f7, %[six] \n\t" + "madd.s %[in1], %[in1], $f3, $f7 \n\t" + "madd.s %[in2], %[in2], $f3, %[in1] \n\t" + "madd.s %[in3], %[in3], $f2, %[in1] \n\t" + "madd.s %[in4], %[in4], $f1, %[in1] \n\t" + "add.s %[res1], $f4, %[in1] \n\t" + "swc1 %[in1], 0(%[x]) \n\t" + "add.s $f0, $f6, %[in1] \n\t" + "madd.s %[in3], %[in3], $f3, %[in2] \n\t" + "madd.s %[in4], %[in4], $f2, %[in2] \n\t" + "add.s %[res2], $f5, %[in2] \n\t" + "madd.s %[res1], %[res1], $f8, %[four] \n\t" + "add.s $f8, $f7, %[in2] \n\t" + "swc1 %[in2], 4(%[x]) \n\t" + "madd.s %[in4], %[in4], $f3, %[in3] \n\t" + "add.s %[res3], $f6, %[in3] \n\t" + "add.s %[res1], %[res1], $f9 \n\t" + "madd.s %[res2], %[res2], $f0, %[four] \n\t" + "swc1 %[in3], 8(%[x]) \n\t" + "add.s %[res4], $f7, %[in4] \n\t" + "madd.s %[res3], %[res3], $f8, %[four] \n\t" + "swc1 %[in4], 12(%[x]) \n\t" + "add.s %[res2], %[res2], $f10 \n\t" + "add.s $f8, %[in1], %[in3] \n\t" + "madd.s %[res3], %[res3], %[in1], %[six] \n\t" + "madd.s %[res4], %[res4], $f8, %[four] \n\t" + "madd.s %[res4], %[res4], %[in2], %[six] \n\t" + + : [in1]"=&f"(in1), [in2]"=&f"(in2), + [in3]"=&f"(in3), [in4]"=&f"(in4), + [res1]"=&f"(res1), [res2]"=&f"(res2), + [res3]"=&f"(res3), [res4]"=&f"(res4) + : [src0_0]"f"(src0_0), [src0_1]"f"(src0_1), + [src0_2]"f"(src0_2), [src0_3]"f"(src0_3), + [gain]"f"(gain), [x]"r"(x), [cy]"r"(cy), + [four]"f"(four), [six]"f"(six) + : "$f0", "$f1", "$f2", "$f3", + "$f4", "$f5", "$f6", "$f7", + "$f8", "$f9", "$f10", + "memory" + ); + + dst0[0 ] = res1; + dst0[sstep ] = res2; + dst0[2*sstep] = res3; + dst0[3*sstep] = res4; + + src0 += 4*sstep; + dst0 += 4*dstep; + } + } else { + int i; + const float *src0 = src; + float *dst0 = dst; + for (i = 0; i < size; i++) { + int j; + float in, res; + in = *src0 * c->gain; + for(j = 0; j < c->order; j++) + in += c->cy[j] * s->x[j]; + res = s->x[0] + in + s->x[c->order >> 1] * c->cx[c->order >> 1]; + for(j = 1; j < c->order >> 1; j++) + res += (s->x[j] + s->x[c->order - j]) * c->cx[j]; + for(j = 0; j < c->order - 1; j++) + s->x[j] = s->x[j + 1]; + *dst0 = res; + s->x[c->order - 1] = in; + src0 += sstep; + dst0 += dstep; + } + } +} +#endif /* HAVE_INLINE_ASM */ + +void ff_iir_filter_init_mips(FFIIRFilterContext *f) { +#if HAVE_INLINE_ASM + f->filter_flt = ff_iir_filter_flt_mips; +#endif /* HAVE_INLINE_ASM */ +} |