Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /*---------------------------------------------------------------------------*\ |
| 2 | Original Copyright |
| 3 | FILE........: AK2LSPD.H |
| 4 | TYPE........: Turbo C header file |
| 5 | COMPANY.....: Voicetronix |
| 6 | AUTHOR......: James Whitehall |
| 7 | DATE CREATED: 21/11/95 |
| 8 | |
| 9 | Modified by Jean-Marc Valin |
| 10 | |
| 11 | This file contains functions for converting Linear Prediction |
| 12 | Coefficients (LPC) to Line Spectral Pair (LSP) and back. Note that the |
| 13 | LSP coefficients are not in radians format but in the x domain of the |
| 14 | unit circle. |
| 15 | |
| 16 | \*---------------------------------------------------------------------------*/ |
| 17 | /** |
| 18 | @file lsp.h |
| 19 | @brief Line Spectral Pair (LSP) functions. |
| 20 | */ |
| 21 | /* Speex License: |
| 22 | |
| 23 | Redistribution and use in source and binary forms, with or without |
| 24 | modification, are permitted provided that the following conditions |
| 25 | are met: |
| 26 | |
| 27 | - Redistributions of source code must retain the above copyright |
| 28 | notice, this list of conditions and the following disclaimer. |
| 29 | |
| 30 | - Redistributions in binary form must reproduce the above copyright |
| 31 | notice, this list of conditions and the following disclaimer in the |
| 32 | documentation and/or other materials provided with the distribution. |
| 33 | |
| 34 | - Neither the name of the Xiph.org Foundation nor the names of its |
| 35 | contributors may be used to endorse or promote products derived from |
| 36 | this software without specific prior written permission. |
| 37 | |
| 38 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 39 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 40 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 41 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 42 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 43 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 44 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 45 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 46 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 47 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 48 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 49 | */ |
| 50 | |
| 51 | #ifndef __AK2LSPD__ |
| 52 | #define __AK2LSPD__ |
| 53 | |
| 54 | #include "arch.h" |
| 55 | |
| 56 | int lpc_to_lsp (spx_coef_t *a, int lpcrdr, spx_lsp_t *freq, int nb, spx_word16_t delta, char *stack); |
| 57 | void lsp_to_lpc(spx_lsp_t *freq, spx_coef_t *ak, int lpcrdr, char *stack); |
| 58 | |
| 59 | /*Added by JMV*/ |
| 60 | void lsp_enforce_margin(spx_lsp_t *lsp, int len, spx_word16_t margin); |
| 61 | |
| 62 | void lsp_interpolate(spx_lsp_t *old_lsp, spx_lsp_t *new_lsp, spx_lsp_t *interp_lsp, int len, int subframe, int nb_subframes); |
| 63 | |
| 64 | #endif /* __AK2LSPD__ */ |