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 MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_ 20 #define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_ 21 22 #include <stdint.h> 23 24 #include "modules/audio_coding/codecs/ilbc/defines.h" 25 26 /*----------------------------------------------------------------* 27 * lsf interpolator (subrutine to LPCencode) 28 *---------------------------------------------------------------*/ 29 30 void WebRtcIlbcfix_SimpleInterpolateLsf( 31 int16_t* syntdenum, /* (o) the synthesis filter denominator 32 resulting from the quantized 33 interpolated lsf Q12 */ 34 int16_t* weightdenum, /* (o) the weighting filter denominator 35 resulting from the unquantized 36 interpolated lsf Q12 */ 37 int16_t* lsf, /* (i) the unquantized lsf coefficients Q13 */ 38 int16_t* lsfdeq, /* (i) the dequantized lsf coefficients Q13 */ 39 int16_t* lsfold, /* (i) the unquantized lsf coefficients of 40 the previous signal frame Q13 */ 41 int16_t* lsfdeqold, /* (i) the dequantized lsf coefficients of the 42 previous signal frame Q13 */ 43 int16_t length, /* (i) should equate FILTERORDER */ 44 IlbcEncoder* iLBCenc_inst 45 /* (i/o) the encoder state structure */ 46 ); 47 48 #endif 49