Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* Copyright (C) 2006 Jean-Marc Valin */ |
| 2 | /** |
| 3 | @file filterbank.h |
| 4 | @brief Converting between psd and filterbank |
| 5 | */ |
| 6 | /* |
| 7 | Redistribution and use in source and binary forms, with or without |
| 8 | modification, are permitted provided that the following conditions are |
| 9 | met: |
| 10 | |
| 11 | 1. Redistributions of source code must retain the above copyright notice, |
| 12 | this list of conditions and the following disclaimer. |
| 13 | |
| 14 | 2. Redistributions in binary form must reproduce the above copyright |
| 15 | notice, this list of conditions and the following disclaimer in the |
| 16 | documentation and/or other materials provided with the distribution. |
| 17 | |
| 18 | 3. The name of the author may not be used to endorse or promote products |
| 19 | derived from this software without specific prior written permission. |
| 20 | |
| 21 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 22 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 23 | OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 25 | INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 27 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 29 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 30 | ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef FILTERBANK_H |
| 35 | #define FILTERBANK_H |
| 36 | |
| 37 | #include "arch.h" |
| 38 | |
| 39 | typedef struct { |
| 40 | int *bank_left; |
| 41 | int *bank_right; |
| 42 | spx_word16_t *filter_left; |
| 43 | spx_word16_t *filter_right; |
| 44 | #ifndef FIXED_POINT |
| 45 | float *scaling; |
| 46 | #endif |
| 47 | int nb_banks; |
| 48 | int len; |
| 49 | } FilterBank; |
| 50 | |
| 51 | |
| 52 | FilterBank *filterbank_new(int banks, spx_word32_t sampling, int len, int type); |
| 53 | |
| 54 | void filterbank_destroy(FilterBank *bank); |
| 55 | |
| 56 | void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel); |
| 57 | |
| 58 | void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *psd); |
| 59 | |
| 60 | #ifndef FIXED_POINT |
| 61 | void filterbank_compute_bank(FilterBank *bank, float *psd, float *mel); |
| 62 | void filterbank_compute_psd(FilterBank *bank, float *mel, float *psd); |
| 63 | #endif |
| 64 | |
| 65 | |
| 66 | #endif |