| 1 | /*
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| 2 | * This file is part of uniaud.dll.
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| 3 | *
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| 4 | * Copyright (c) 2010 Mensys BV
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| 5 | * Copyright (c) 2007 Vlad Stelmahovsky aka Vladest
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| 6 | *
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| 7 | * This library is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU Lesser General Public License as
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| 9 | * published by the Free Software Foundation, either version 3 of
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| 10 | * the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This library is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU Lesser General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU Lesser General Public
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| 18 | * License and the GNU General Public License along with this library.
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| 19 | * If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 | #ifndef __resample__
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| 22 | #define __resample__
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| 23 |
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| 24 | #include <stdint.h>
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| 25 |
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| 26 | #define FELEM int16_t
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| 27 | #define FELEM2 int32_t
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| 28 | #define FELEM_MAX INT16_MAX
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| 29 | #define FELEM_MIN INT16_MIN
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| 30 |
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| 31 | typedef struct AVResampleContext{
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| 32 | FELEM *filter_bank;
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| 33 | int filter_length;
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| 34 | int ideal_dst_incr;
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| 35 | int dst_incr;
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| 36 | int index;
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| 37 | int frac;
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| 38 | int src_incr;
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| 39 | int compensation_distance;
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| 40 | int phase_shift;
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| 41 | int phase_mask;
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| 42 | int linear;
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| 43 | }AVResampleContext;
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| 44 |
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| 45 | typedef struct ReSampleContext {
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| 46 | struct AVResampleContext *resample_context;
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| 47 | short *temp[2];
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| 48 | int temp_len;
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| 49 | float ratio;
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| 50 | /* channel convert */
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| 51 | int input_channels, output_channels, filter_channels;
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| 52 | }/* ReSampleContext*/;
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| 53 |
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| 54 | struct ReSampleContext *audio_resample_init(int output_channels, int input_channels,
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| 55 | int output_rate, int input_rate);
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| 56 |
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| 57 | int audio_resample(struct ReSampleContext *s, short *output, short *input, int nb_samples);
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| 58 |
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| 59 | void audio_resample_close(struct ReSampleContext *s);
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| 60 | AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_size, int phase_shift, int linear, double cutoff);
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| 61 | void av_resample_close(AVResampleContext *c);
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| 62 | int av_resample(AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
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| 63 |
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| 64 | #endif /* __resample__ */
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