blob: 1731dad3cf8cdc4643448a982781d11199018ee2
| 1 | /* |
| 2 | * audio resampling |
| 3 | * Copyright (c) 2004-2012 Michael Niedermayer <michaelni@gmx.at> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef SWRESAMPLE_RESAMPLE_H |
| 23 | #define SWRESAMPLE_RESAMPLE_H |
| 24 | |
| 25 | #include "libavutil/log.h" |
| 26 | #include "libavutil/samplefmt.h" |
| 27 | |
| 28 | #include "swresample_internal.h" |
| 29 | |
| 30 | typedef struct ResampleContext { |
| 31 | const AVClass *av_class; |
| 32 | uint8_t *filter_bank; |
| 33 | int filter_length; |
| 34 | int filter_alloc; |
| 35 | int ideal_dst_incr; |
| 36 | int dst_incr; |
| 37 | int dst_incr_div; |
| 38 | int dst_incr_mod; |
| 39 | int index; |
| 40 | int frac; |
| 41 | int src_incr; |
| 42 | int compensation_distance; |
| 43 | int phase_count; |
| 44 | int linear; |
| 45 | enum SwrFilterType filter_type; |
| 46 | double kaiser_beta; |
| 47 | double factor; |
| 48 | enum AVSampleFormat format; |
| 49 | int felem_size; |
| 50 | int filter_shift; |
| 51 | int phase_count_compensation; /* desired phase_count when compensation is enabled */ |
| 52 | |
| 53 | struct { |
| 54 | void (*resample_one)(void *dst, const void *src, |
| 55 | int n, int64_t index, int64_t incr); |
| 56 | int (*resample_common)(struct ResampleContext *c, void *dst, |
| 57 | const void *src, int n, int update_ctx); |
| 58 | int (*resample_linear)(struct ResampleContext *c, void *dst, |
| 59 | const void *src, int n, int update_ctx); |
| 60 | } dsp; |
| 61 | } ResampleContext; |
| 62 | |
| 63 | void swri_resample_dsp_init(ResampleContext *c); |
| 64 | void swri_resample_dsp_x86_init(ResampleContext *c); |
| 65 | void swri_resample_dsp_arm_init(ResampleContext *c); |
| 66 | void swri_resample_dsp_aarch64_init(ResampleContext *c); |
| 67 | |
| 68 | #endif /* SWRESAMPLE_RESAMPLE_H */ |
| 69 |