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2ba45a60 DM |
1 | /* |
2 | * This file is part of FFmpeg. | |
3 | * | |
4 | * FFmpeg 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. | |
8 | * | |
9 | * FFmpeg 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. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public | |
15 | * License along with FFmpeg; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #include "ttadsp.h" | |
20 | ||
21 | static void ttafilter_process_dec_c(int32_t *qm, int32_t *dx, int32_t *dl, | |
22 | int32_t *error, int32_t *in, int32_t shift, | |
23 | int32_t round) { | |
24 | if (*error < 0) { | |
25 | qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3]; | |
26 | qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7]; | |
27 | } else if (*error > 0) { | |
28 | qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3]; | |
29 | qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7]; | |
30 | } | |
31 | ||
32 | round += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] + | |
33 | dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7]; | |
34 | ||
35 | dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4]; | |
36 | dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4]; | |
37 | ||
38 | dx[4] = ((dl[4] >> 30) | 1); | |
39 | dx[5] = ((dl[5] >> 30) | 2) & ~1; | |
40 | dx[6] = ((dl[6] >> 30) | 2) & ~1; | |
41 | dx[7] = ((dl[7] >> 30) | 4) & ~3; | |
42 | ||
43 | *error = *in; | |
44 | *in += (round >> shift); | |
45 | ||
46 | dl[4] = -dl[5]; dl[5] = -dl[6]; | |
47 | dl[6] = *in - dl[7]; dl[7] = *in; | |
48 | dl[5] += dl[6]; dl[4] += dl[5]; | |
49 | } | |
50 | ||
51 | av_cold void ff_ttadsp_init(TTADSPContext *c) | |
52 | { | |
53 | c->ttafilter_process_dec = ttafilter_process_dec_c; | |
54 | ||
55 | if (ARCH_X86) | |
56 | ff_ttadsp_init_x86(c); | |
57 | } |