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DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/lsp.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
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Who changed what in which revision?

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TMBOY 47:9e361da97763 1 /*---------------------------------------------------------------------------*\
TMBOY 47:9e361da97763 2 Original Copyright
TMBOY 47:9e361da97763 3 FILE........: AK2LSPD.H
TMBOY 47:9e361da97763 4 TYPE........: Turbo C header file
TMBOY 47:9e361da97763 5 COMPANY.....: Voicetronix
TMBOY 47:9e361da97763 6 AUTHOR......: James Whitehall
TMBOY 47:9e361da97763 7 DATE CREATED: 21/11/95
TMBOY 47:9e361da97763 8
TMBOY 47:9e361da97763 9 Modified by Jean-Marc Valin
TMBOY 47:9e361da97763 10
TMBOY 47:9e361da97763 11 This file contains functions for converting Linear Prediction
TMBOY 47:9e361da97763 12 Coefficients (LPC) to Line Spectral Pair (LSP) and back. Note that the
TMBOY 47:9e361da97763 13 LSP coefficients are not in radians format but in the x domain of the
TMBOY 47:9e361da97763 14 unit circle.
TMBOY 47:9e361da97763 15
TMBOY 47:9e361da97763 16 \*---------------------------------------------------------------------------*/
TMBOY 47:9e361da97763 17 /**
TMBOY 47:9e361da97763 18 @file lsp.h
TMBOY 47:9e361da97763 19 @brief Line Spectral Pair (LSP) functions.
TMBOY 47:9e361da97763 20 */
TMBOY 47:9e361da97763 21 /* Speex License:
TMBOY 47:9e361da97763 22
TMBOY 47:9e361da97763 23 Redistribution and use in source and binary forms, with or without
TMBOY 47:9e361da97763 24 modification, are permitted provided that the following conditions
TMBOY 47:9e361da97763 25 are met:
TMBOY 47:9e361da97763 26
TMBOY 47:9e361da97763 27 - Redistributions of source code must retain the above copyright
TMBOY 47:9e361da97763 28 notice, this list of conditions and the following disclaimer.
TMBOY 47:9e361da97763 29
TMBOY 47:9e361da97763 30 - Redistributions in binary form must reproduce the above copyright
TMBOY 47:9e361da97763 31 notice, this list of conditions and the following disclaimer in the
TMBOY 47:9e361da97763 32 documentation and/or other materials provided with the distribution.
TMBOY 47:9e361da97763 33
TMBOY 47:9e361da97763 34 - Neither the name of the Xiph.org Foundation nor the names of its
TMBOY 47:9e361da97763 35 contributors may be used to endorse or promote products derived from
TMBOY 47:9e361da97763 36 this software without specific prior written permission.
TMBOY 47:9e361da97763 37
TMBOY 47:9e361da97763 38 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
TMBOY 47:9e361da97763 39 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
TMBOY 47:9e361da97763 40 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
TMBOY 47:9e361da97763 41 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
TMBOY 47:9e361da97763 42 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
TMBOY 47:9e361da97763 43 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
TMBOY 47:9e361da97763 44 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
TMBOY 47:9e361da97763 45 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
TMBOY 47:9e361da97763 46 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
TMBOY 47:9e361da97763 47 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
TMBOY 47:9e361da97763 48 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
TMBOY 47:9e361da97763 49 */
TMBOY 47:9e361da97763 50
TMBOY 47:9e361da97763 51 #ifndef __AK2LSPD__
TMBOY 47:9e361da97763 52 #define __AK2LSPD__
TMBOY 47:9e361da97763 53
TMBOY 47:9e361da97763 54 #include "misc.h"
TMBOY 47:9e361da97763 55
TMBOY 47:9e361da97763 56 int lpc_to_lsp (spx_coef_t *a, int lpcrdr, spx_lsp_t *freq, int nb, spx_word16_t delta, char *stack);
TMBOY 47:9e361da97763 57 void lsp_to_lpc(spx_lsp_t *freq, spx_coef_t *ak, int lpcrdr, char *stack);
TMBOY 47:9e361da97763 58
TMBOY 47:9e361da97763 59 /*Added by JMV*/
TMBOY 47:9e361da97763 60 void lsp_enforce_margin(spx_lsp_t *lsp, int len, spx_word16_t margin);
TMBOY 47:9e361da97763 61
TMBOY 47:9e361da97763 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);
TMBOY 47:9e361da97763 63
TMBOY 47:9e361da97763 64 #endif /* __AK2LSPD__ */