1e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/* 2e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Copyright 2003-2010, VisualOn, Inc. 3e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 4e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Licensed under the Apache License, Version 2.0 (the "License"); 5e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** you may not use this file except in compliance with the License. 6e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** You may obtain a copy of the License at 7e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 8e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** http://www.apache.org/licenses/LICENSE-2.0 9e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** 10e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** Unless required by applicable law or agreed to in writing, software 11e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** distributed under the License is distributed on an "AS IS" BASIS, 12e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** See the License for the specific language governing permissions and 14e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard ** limitations under the License. 15e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard */ 16e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 17e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/*************************************************************************** 18e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* File: qisf_ns.c * 19e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 20e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Description: Coding/Decoding of ISF parameters for background noise.* 21e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* The ISF vector is quantized using VQ with split-by-5 * 22e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* * 23e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard****************************************************************************/ 24e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 25e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "typedef.h" 26e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "basic_op.h" 27e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "acelp.h" 28e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard#include "qisf_ns.tab" /* Codebooks of ISFs */ 29e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 30e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/*------------------------------------------------------------------* 31e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* routine: Qisf_ns() * 32e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* ~~~~~~~~~ * 33e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard*------------------------------------------------------------------*/ 34e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 35e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgardvoid Qisf_ns( 365d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */ 375d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 * isf_q, /* output: quantized ISF */ 385d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 * indice /* output: quantization indices */ 395d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen ) 40e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard{ 415d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 i; 425d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word32 tmp; 43e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 445d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < ORDER; i++) 455d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 465d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i] = sub(isf1[i], mean_isf_noise[i]); 475d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 48e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 495d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen indice[0] = Sub_VQ(&isf_q[0], dico1_isf_noise, 2, SIZE_BK_NOISE1, &tmp); 505d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen indice[1] = Sub_VQ(&isf_q[2], dico2_isf_noise, 3, SIZE_BK_NOISE2, &tmp); 515d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen indice[2] = Sub_VQ(&isf_q[5], dico3_isf_noise, 3, SIZE_BK_NOISE3, &tmp); 525d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen indice[3] = Sub_VQ(&isf_q[8], dico4_isf_noise, 4, SIZE_BK_NOISE4, &tmp); 535d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen indice[4] = Sub_VQ(&isf_q[12], dico5_isf_noise, 4, SIZE_BK_NOISE5, &tmp); 54e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 555d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen /* decoding the ISFs */ 56e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 575d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Disf_ns(indice, isf_q); 58e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 595d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen return; 60e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard} 61e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 62e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard/******************************************************************** 63e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Function: Disf_ns() * 64e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* ~~~~~~~~~ * 65e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Decoding of ISF parameters * 66e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard*-------------------------------------------------------------------* 67e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* Arguments: * 68e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* indice[] : indices of the selected codebook entries * 69e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard* isf[] : quantized ISFs (in frequency domain) * 70e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard*********************************************************************/ 71e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 72e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgardvoid Disf_ns( 735d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 * indice, /* input: quantization indices */ 745d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ 755d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen ) 76e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard{ 775d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Word16 i; 785d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen 795d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < 2; i++) 805d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 815d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i] = dico1_isf_noise[indice[0] * 2 + i]; 825d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 835d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < 3; i++) 845d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 855d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i + 2] = dico2_isf_noise[indice[1] * 3 + i]; 865d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 875d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < 3; i++) 885d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 895d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i + 5] = dico3_isf_noise[indice[2] * 3 + i]; 905d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 915d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < 4; i++) 925d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 935d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i + 8] = dico4_isf_noise[indice[3] * 4 + i]; 945d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 955d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < 4; i++) 965d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 975d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i + 12] = dico5_isf_noise[indice[4] * 4 + i]; 985d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 995d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen 1005d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen for (i = 0; i < ORDER; i++) 1015d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen { 1025d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen isf_q[i] = add(isf_q[i], mean_isf_noise[i]); 1035d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen } 1045d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen 1055d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen Reorder_isf(isf_q, ISF_GAP, ORDER); 1065d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen 1075d5c3a132bb446ac78a37dfaac24a46cacf0dd73Marco Nelissen return; 108e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard} 109e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 110e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 111e2e838afcf03e603a41a0455846eaf9614537c16Mans Rullgard 112