1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /****************************************************************** 12 13 iLBC Speech Coder ANSI-C Source Code 14 15 WebRtcIlbcfix_Poly2Lsp.h 16 17 ******************************************************************/ 18 19 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_POLY_TO_LSP_H_ 20 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_POLY_TO_LSP_H_ 21 22 #include "defines.h" 23 24 /*----------------------------------------------------------------* 25 * conversion from lpc coefficients to lsp coefficients 26 * function is only for 10:th order LPC 27 *---------------------------------------------------------------*/ 28 29 void WebRtcIlbcfix_Poly2Lsp( 30 int16_t *a, /* (o) A coefficients in Q12 */ 31 int16_t *lsp, /* (i) LSP coefficients in Q15 */ 32 int16_t *old_lsp /* (i) old LSP coefficients that are used if the new 33 coefficients turn out to be unstable */ 34 ); 35 36 #endif 37
