2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "libavutil/avutil.h"
29 #define FUNC(n) AV_JOIN(n ## _, SAMPLE_SIZE)
32 # define sum_type int64_t
33 # define MUL(a, b) MUL64(a, b)
34 # define CLIP(x) av_clipl_int32(x)
36 # define sum_type int32_t
37 # define MUL(a, b) ((a) * (b))
42 int c = coefs[(x)-1]; \
48 static av_always_inline void FUNC(lpc_encode_unrolled)(int32_t *res,
49 const int32_t *smp, int len, int order,
50 const int32_t *coefs, int shift, int big)
53 for (i = order; i < len; i += 2) {
55 sum_type p0 = 0, p1 = 0;
103 res[i ] = smp[i ] - CLIP(p0 >> shift);
104 res[i+1] = smp[i+1] - CLIP(p1 >> shift);
108 static void FUNC(flac_lpc_encode_c)(int32_t *res, const int32_t *smp, int len,
109 int order, const int32_t *coefs, int shift)
112 for (i = 0; i < order; i++)
115 for (i = order; i < len; i += 2) {
118 sum_type p0 = 0, p1 = 0;
119 for (j = 0; j < order; j++) {
125 res[i ] = smp[i ] - CLIP(p0 >> shift);
126 res[i+1] = smp[i+1] - CLIP(p1 >> shift);
130 case 1: FUNC(lpc_encode_unrolled)(res, smp, len, 1, coefs, shift, 0); break;
131 case 2: FUNC(lpc_encode_unrolled)(res, smp, len, 2, coefs, shift, 0); break;
132 case 3: FUNC(lpc_encode_unrolled)(res, smp, len, 3, coefs, shift, 0); break;
133 case 4: FUNC(lpc_encode_unrolled)(res, smp, len, 4, coefs, shift, 0); break;
134 case 5: FUNC(lpc_encode_unrolled)(res, smp, len, 5, coefs, shift, 0); break;
135 case 6: FUNC(lpc_encode_unrolled)(res, smp, len, 6, coefs, shift, 0); break;
136 case 7: FUNC(lpc_encode_unrolled)(res, smp, len, 7, coefs, shift, 0); break;
137 case 8: FUNC(lpc_encode_unrolled)(res, smp, len, 8, coefs, shift, 0); break;
138 default: FUNC(lpc_encode_unrolled)(res, smp, len, order, coefs, shift, 1); break;