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_SimpleInterpolateLsf.h 16 17 ******************************************************************/ 18 19 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_ 20 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_ 21 22 #include "defines.h" 23 24 /*----------------------------------------------------------------* 25 * lsf interpolator (subrutine to LPCencode) 26 *---------------------------------------------------------------*/ 27 28 void WebRtcIlbcfix_SimpleInterpolateLsf( 29 int16_t *syntdenum, /* (o) the synthesis filter denominator 30 resulting from the quantized 31 interpolated lsf Q12 */ 32 int16_t *weightdenum, /* (o) the weighting filter denominator 33 resulting from the unquantized 34 interpolated lsf Q12 */ 35 int16_t *lsf, /* (i) the unquantized lsf coefficients Q13 */ 36 int16_t *lsfdeq, /* (i) the dequantized lsf coefficients Q13 */ 37 int16_t *lsfold, /* (i) the unquantized lsf coefficients of 38 the previous signal frame Q13 */ 39 int16_t *lsfdeqold, /* (i) the dequantized lsf coefficients of the 40 previous signal frame Q13 */ 41 int16_t length, /* (i) should equate FILTERORDER */ 42 IlbcEncoder *iLBCenc_inst 43 /* (i/o) the encoder state structure */ 44 ); 45 46 #endif 47