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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2004 Michael Niedermayer |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #if defined(CONFIG_RESAMPLE_DBL) |
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| 22 | #define SET_TYPE(func) func ## _dbl |
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| 23 | #define FELEM double |
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| 24 | #define FELEM2 double |
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| 25 | #define FELEML double |
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| 26 | #define OUT(d, v) d = v |
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| 27 | #define DBL_TO_FELEM(d, v) d = v |
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| 28 | #elif defined(CONFIG_RESAMPLE_FLT) |
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| 29 | #define SET_TYPE(func) func ## _flt |
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| 30 | #define FELEM float |
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| 31 | #define FELEM2 float |
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| 32 | #define FELEML float |
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| 33 | #define OUT(d, v) d = v |
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| 34 | #define DBL_TO_FELEM(d, v) d = v |
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| 35 | #elif defined(CONFIG_RESAMPLE_S32) |
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| 36 | #define SET_TYPE(func) func ## _s32 |
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| 37 | #define FELEM int32_t |
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| 38 | #define FELEM2 int64_t |
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| 39 | #define FELEML int64_t |
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| 40 | #define OUT(d, v) d = av_clipl_int32((v + (1 << 29)) >> 30) |
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| 41 | #define DBL_TO_FELEM(d, v) d = av_clipl_int32(llrint(v * (1 << 30))); |
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| 42 | #else |
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| 43 | #define SET_TYPE(func) func ## _s16 |
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| 44 | #define FELEM int16_t |
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| 45 | #define FELEM2 int32_t |
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| 46 | #define FELEML int64_t |
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| 47 | #define OUT(d, v) d = av_clip_int16((v + (1 << 14)) >> 15) |
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| 48 | #define DBL_TO_FELEM(d, v) d = av_clip_int16(lrint(v * (1 << 15))) |
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| 49 | #endif |
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| 50 | |||
| 51 | static void SET_TYPE(resample_one)(ResampleContext *c, int no_filter, |
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| 52 | void *dst0, int dst_index, const void *src0, |
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| 53 | int src_size, int index, int frac) |
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| 54 | { |
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| 55 | FELEM *dst = dst0; |
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| 56 | const FELEM *src = src0; |
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| 57 | |||
| 58 | if (no_filter) { |
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| 59 | dst[dst_index] = src[index]; |
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| 60 | } else { |
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| 61 | int i; |
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| 62 | int sample_index = index >> c->phase_shift; |
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| 63 | FELEM2 val = 0; |
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| 64 | FELEM *filter = ((FELEM *)c->filter_bank) + |
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| 65 | c->filter_length * (index & c->phase_mask); |
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| 66 | |||
| 67 | if (sample_index < 0) { |
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| 68 | for (i = 0; i < c->filter_length; i++) |
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| 69 | val += src[FFABS(sample_index + i) % src_size] * |
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| 70 | (FELEM2)filter[i]; |
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| 71 | } else if (c->linear) { |
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| 72 | FELEM2 v2 = 0; |
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| 73 | for (i = 0; i < c->filter_length; i++) { |
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| 74 | val += src[abs(sample_index + i)] * (FELEM2)filter[i]; |
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| 75 | v2 += src[abs(sample_index + i)] * (FELEM2)filter[i + c->filter_length]; |
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| 76 | } |
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| 77 | val += (v2 - val) * (FELEML)frac / c->src_incr; |
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| 78 | } else { |
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| 79 | for (i = 0; i < c->filter_length; i++) |
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| 80 | val += src[sample_index + i] * (FELEM2)filter[i]; |
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| 81 | } |
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| 82 | |||
| 83 | OUT(dst[dst_index], val); |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | static void SET_TYPE(set_filter)(void *filter0, double *tab, int phase, |
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| 88 | int tap_count) |
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| 89 | { |
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| 90 | int i; |
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| 91 | FELEM *filter = ((FELEM *)filter0) + phase * tap_count; |
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| 92 | for (i = 0; i < tap_count; i++) { |
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| 93 | DBL_TO_FELEM(filter[i], tab[i]); |
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| 94 | } |
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| 95 | } |
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| 96 | |||
| 97 | #undef SET_TYPE |
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| 98 | #undef FELEM |
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| 99 | #undef FELEM2 |
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| 100 | #undef FELEML |
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| 101 | #undef OUT |
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| 102 | #undef DBL_TO_FELEM |