--- /dev/null
- 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)
+/*
+ * 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
+#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
+typedef struct FFIIRFilterCoeffs {
+ int order;
+ float gain;
+ int *cx;
+ float *cy;
+} FFIIRFilterCoeffs;
+
+typedef struct FFIIRFilterState {
+ float x[1];
+} FFIIRFilterState;
+
- f->filter_flt = ff_iir_filter_flt_mips;
++static void iir_filter_flt_mips(const struct FFIIRFilterCoeffs *c,
++ struct FFIIRFilterState *s, int size,
++ const float *src, ptrdiff_t sstep, float *dst, ptrdiff_t 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_MIPS32R6 && !HAVE_MIPS64R6 */
+#endif /* HAVE_INLINE_ASM */
+
+void ff_iir_filter_init_mips(FFIIRFilterContext *f) {
+#if HAVE_INLINE_ASM
+#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
++ f->filter_flt = iir_filter_flt_mips;
+#endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
+#endif /* HAVE_INLINE_ASM */
+}
projects / ffmpeg / commitdiff