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18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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29 * Author: Nedeljko Babic (nbabic@mips.com)
31 * various filters for ACELP-based codecs optimized for MIPS
33 * This file is part of FFmpeg.
35 * FFmpeg is free software; you can redistribute it and/or
36 * modify it under the terms of the GNU Lesser General Public
37 * License as published by the Free Software Foundation; either
38 * version 2.1 of the License, or (at your option) any later version.
40 * FFmpeg is distributed in the hope that it will be useful,
41 * but WITHOUT ANY WARRANTY; without even the implied warranty of
42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
43 * Lesser General Public License for more details.
45 * You should have received a copy of the GNU Lesser General Public
46 * License along with FFmpeg; if not, write to the Free Software
47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
52 * Reference: libavcodec/acelp_filters.c
55 #include "libavutil/attributes.h"
56 #include "libavcodec/acelp_filters.h"
57 #include "libavutil/mips/asmdefs.h"
60 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
61 static void ff_acelp_interpolatef_mips(float *out, const float *in,
62 const float *filter_coeffs, int precision,
63 int frac_pos, int filter_length, int length)
66 int prec = precision * 4;
67 int fc_offset = precision - frac_pos;
68 float in_val_p, in_val_m, fc_val_p, fc_val_m;
70 for (n = 0; n < length; n++) {
72 * four pointers are defined in order to minimize number of
73 * computations done in inner loop
75 const float *p_in_p = &in[n];
76 const float *p_in_m = &in[n-1];
77 const float *p_filter_coeffs_p = &filter_coeffs[frac_pos];
78 const float *p_filter_coeffs_m = filter_coeffs + fc_offset;
81 for (i = 0; i < filter_length;i++) {
83 "lwc1 %[in_val_p], 0(%[p_in_p]) \n\t"
84 "lwc1 %[fc_val_p], 0(%[p_filter_coeffs_p]) \n\t"
85 "lwc1 %[in_val_m], 0(%[p_in_m]) \n\t"
86 "lwc1 %[fc_val_m], 0(%[p_filter_coeffs_m]) \n\t"
87 PTR_ADDIU "%[p_in_p], %[p_in_p], 4 \n\t"
88 "madd.s %[v],%[v], %[in_val_p],%[fc_val_p] \n\t"
89 PTR_ADDIU "%[p_in_m], %[p_in_m], -4 \n\t"
90 PTR_ADDU "%[p_filter_coeffs_p],%[p_filter_coeffs_p], %[prec] \n\t"
91 PTR_ADDU "%[p_filter_coeffs_m],%[p_filter_coeffs_m], %[prec] \n\t"
92 "madd.s %[v],%[v],%[in_val_m], %[fc_val_m] \n\t"
94 : [v] "+&f" (v),[p_in_p] "+r" (p_in_p), [p_in_m] "+r" (p_in_m),
95 [p_filter_coeffs_p] "+r" (p_filter_coeffs_p),
96 [in_val_p] "=&f" (in_val_p), [in_val_m] "=&f" (in_val_m),
97 [fc_val_p] "=&f" (fc_val_p), [fc_val_m] "=&f" (fc_val_m),
98 [p_filter_coeffs_m] "+r" (p_filter_coeffs_m)
107 static void ff_acelp_apply_order_2_transfer_function_mips(float *out, const float *in,
108 const float zero_coeffs[2],
109 const float pole_coeffs[2],
110 float gain, float mem[2], int n)
113 * loop is unrolled eight times
117 "lwc1 $f0, 0(%[mem]) \n\t"
118 "blez %[n], ff_acelp_apply_order_2_transfer_function_end%= \n\t"
119 "lwc1 $f1, 4(%[mem]) \n\t"
120 "lwc1 $f2, 0(%[pole_coeffs]) \n\t"
121 "lwc1 $f3, 4(%[pole_coeffs]) \n\t"
122 "lwc1 $f4, 0(%[zero_coeffs]) \n\t"
123 "lwc1 $f5, 4(%[zero_coeffs]) \n\t"
125 "ff_acelp_apply_order_2_transfer_function_madd%=: \n\t"
127 "lwc1 $f6, 0(%[in]) \n\t"
128 "mul.s $f9, $f3, $f1 \n\t"
129 "mul.s $f7, $f2, $f0 \n\t"
130 "msub.s $f7, $f7, %[gain], $f6 \n\t"
131 "sub.s $f7, $f7, $f9 \n\t"
132 "madd.s $f8, $f7, $f4, $f0 \n\t"
133 "madd.s $f8, $f8, $f5, $f1 \n\t"
134 "lwc1 $f11, 4(%[in]) \n\t"
135 "mul.s $f12, $f3, $f0 \n\t"
136 "mul.s $f13, $f2, $f7 \n\t"
137 "msub.s $f13, $f13, %[gain], $f11 \n\t"
138 "sub.s $f13, $f13, $f12 \n\t"
139 "madd.s $f14, $f13, $f4, $f7 \n\t"
140 "madd.s $f14, $f14, $f5, $f0 \n\t"
141 "swc1 $f8, 0(%[out]) \n\t"
142 "lwc1 $f6, 8(%[in]) \n\t"
143 "mul.s $f9, $f3, $f7 \n\t"
144 "mul.s $f15, $f2, $f13 \n\t"
145 "msub.s $f15, $f15, %[gain], $f6 \n\t"
146 "sub.s $f15, $f15, $f9 \n\t"
147 "madd.s $f8, $f15, $f4, $f13 \n\t"
148 "madd.s $f8, $f8, $f5, $f7 \n\t"
149 "swc1 $f14, 4(%[out]) \n\t"
150 "lwc1 $f11, 12(%[in]) \n\t"
151 "mul.s $f12, $f3, $f13 \n\t"
152 "mul.s $f16, $f2, $f15 \n\t"
153 "msub.s $f16, $f16, %[gain], $f11 \n\t"
154 "sub.s $f16, $f16, $f12 \n\t"
155 "madd.s $f14, $f16, $f4, $f15 \n\t"
156 "madd.s $f14, $f14, $f5, $f13 \n\t"
157 "swc1 $f8, 8(%[out]) \n\t"
158 "lwc1 $f6, 16(%[in]) \n\t"
159 "mul.s $f9, $f3, $f15 \n\t"
160 "mul.s $f7, $f2, $f16 \n\t"
161 "msub.s $f7, $f7, %[gain], $f6 \n\t"
162 "sub.s $f7, $f7, $f9 \n\t"
163 "madd.s $f8, $f7, $f4, $f16 \n\t"
164 "madd.s $f8, $f8, $f5, $f15 \n\t"
165 "swc1 $f14, 12(%[out]) \n\t"
166 "lwc1 $f11, 20(%[in]) \n\t"
167 "mul.s $f12, $f3, $f16 \n\t"
168 "mul.s $f13, $f2, $f7 \n\t"
169 "msub.s $f13, $f13, %[gain], $f11 \n\t"
170 "sub.s $f13, $f13, $f12 \n\t"
171 "madd.s $f14, $f13, $f4, $f7 \n\t"
172 "madd.s $f14, $f14, $f5, $f16 \n\t"
173 "swc1 $f8, 16(%[out]) \n\t"
174 "lwc1 $f6, 24(%[in]) \n\t"
175 "mul.s $f9, $f3, $f7 \n\t"
176 "mul.s $f15, $f2, $f13 \n\t"
177 "msub.s $f15, $f15, %[gain], $f6 \n\t"
178 "sub.s $f1, $f15, $f9 \n\t"
179 "madd.s $f8, $f1, $f4, $f13 \n\t"
180 "madd.s $f8, $f8, $f5, $f7 \n\t"
181 "swc1 $f14, 20(%[out]) \n\t"
182 "lwc1 $f11, 28(%[in]) \n\t"
183 "mul.s $f12, $f3, $f13 \n\t"
184 "mul.s $f16, $f2, $f1 \n\t"
185 "msub.s $f16, $f16, %[gain], $f11 \n\t"
186 "sub.s $f0, $f16, $f12 \n\t"
187 "madd.s $f14, $f0, $f4, $f1 \n\t"
188 "madd.s $f14, $f14, $f5, $f13 \n\t"
189 "swc1 $f8, 24(%[out]) \n\t"
190 PTR_ADDIU "%[out], 32 \n\t"
191 PTR_ADDIU "%[in], 32 \n\t"
192 "addiu %[n], -8 \n\t"
193 "swc1 $f14, -4(%[out]) \n\t"
194 "bnez %[n], ff_acelp_apply_order_2_transfer_function_madd%= \n\t"
195 "swc1 $f1, 4(%[mem]) \n\t"
196 "swc1 $f0, 0(%[mem]) \n\t"
198 "ff_acelp_apply_order_2_transfer_function_end%=: \n\t"
201 [in] "+r" (in), [gain] "+f" (gain),
202 [n] "+r" (n), [mem] "+r" (mem)
203 : [zero_coeffs] "r" (zero_coeffs),
204 [pole_coeffs] "r" (pole_coeffs)
205 : "$f0", "$f1", "$f2", "$f3", "$f4", "$f5",
206 "$f6", "$f7", "$f8", "$f9", "$f10", "$f11",
207 "$f12", "$f13", "$f14", "$f15", "$f16", "memory"
210 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
211 #endif /* HAVE_INLINE_ASM */
213 void ff_acelp_filter_init_mips(ACELPFContext *c)
216 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
217 c->acelp_interpolatef = ff_acelp_interpolatef_mips;
218 c->acelp_apply_order_2_transfer_function = ff_acelp_apply_order_2_transfer_function_mips;