| /* Copyright (C) 2006 Jean-Marc Valin */ |
| /** |
| @file filterbank.h |
| @brief Converting between psd and filterbank |
| */ |
| /* |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| |
| 1. Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| 3. The name of the author may not be used to endorse or promote products |
| derived from this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef FILTERBANK_H |
| #define FILTERBANK_H |
| |
| #include "arch.h" |
| |
| typedef struct { |
| int *bank_left; |
| int *bank_right; |
| spx_word16_t *filter_left; |
| spx_word16_t *filter_right; |
| #ifndef FIXED_POINT |
| float *scaling; |
| #endif |
| int nb_banks; |
| int len; |
| } FilterBank; |
| |
| |
| FilterBank *filterbank_new(int banks, spx_word32_t sampling, int len, int type); |
| |
| void filterbank_destroy(FilterBank *bank); |
| |
| void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel); |
| |
| void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *psd); |
| |
| #ifndef FIXED_POINT |
| void filterbank_compute_bank(FilterBank *bank, float *psd, float *mel); |
| void filterbank_compute_psd(FilterBank *bank, float *mel, float *psd); |
| #endif |
| |
| |
| #endif |