diff options
author | Nanang Izzuddin <nanang@teluu.com> | 2008-06-10 14:09:37 +0000 |
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committer | Nanang Izzuddin <nanang@teluu.com> | 2008-06-10 14:09:37 +0000 |
commit | beaa7b7491e6deccd6c49abc375702e23aa4324a (patch) | |
tree | 9ebf2d154e6c5d7bfc61222a60731d59deb2e89e /third_party/speex/libspeex/lsp.h | |
parent | 60ce2ec8b88876b89c408ef7b78a4641d1162148 (diff) |
Upgraded Speex version to the latest and reorganized it in local copy (since Speex is now using Git)
git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@2002 74dad513-b988-da41-8d7b-12977e46ad98
Diffstat (limited to 'third_party/speex/libspeex/lsp.h')
-rw-r--r-- | third_party/speex/libspeex/lsp.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/speex/libspeex/lsp.h b/third_party/speex/libspeex/lsp.h new file mode 100644 index 00000000..b55bd42f --- /dev/null +++ b/third_party/speex/libspeex/lsp.h @@ -0,0 +1,64 @@ +/*---------------------------------------------------------------------------*\ +Original Copyright + FILE........: AK2LSPD.H + TYPE........: Turbo C header file + COMPANY.....: Voicetronix + AUTHOR......: James Whitehall + DATE CREATED: 21/11/95 + +Modified by Jean-Marc Valin + + This file contains functions for converting Linear Prediction + Coefficients (LPC) to Line Spectral Pair (LSP) and back. Note that the + LSP coefficients are not in radians format but in the x domain of the + unit circle. + +\*---------------------------------------------------------------------------*/ +/** + @file lsp.h + @brief Line Spectral Pair (LSP) functions. +*/ +/* Speex License: + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + - Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + - 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. + + - Neither the name of the Xiph.org Foundation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + ``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 FOUNDATION OR + CONTRIBUTORS 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 __AK2LSPD__ +#define __AK2LSPD__ + +#include "arch.h" + +int lpc_to_lsp (spx_coef_t *a, int lpcrdr, spx_lsp_t *freq, int nb, spx_word16_t delta, char *stack); +void lsp_to_lpc(spx_lsp_t *freq, spx_coef_t *ak, int lpcrdr, char *stack); + +/*Added by JMV*/ +void lsp_enforce_margin(spx_lsp_t *lsp, int len, spx_word16_t margin); + +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); + +#endif /* __AK2LSPD__ */ |