1 /*---------------------------------------------------------------------------- 2 * 3 * File: 4 * eas_ima_tables.c 5 * 6 * Contents and purpose: 7 * Contains the constant tables for IMA encode/decode 8 * 9 * Copyright (c) 2005 Sonic Network Inc. 10 11 * Licensed under the Apache License, Version 2.0 (the "License"); 12 * you may not use this file except in compliance with the License. 13 * You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, software 18 * distributed under the License is distributed on an "AS IS" BASIS, 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 * See the License for the specific language governing permissions and 21 * limitations under the License. 22 * 23 *---------------------------------------------------------------------------- 24 * Revision Control: 25 * $Revision: 760 $ 26 * $Date: 2007-07-17 23:09:36 -0700 (Tue, 17 Jul 2007) $ 27 *---------------------------------------------------------------------------- 28 */ 29 30 #include "eas_types.h" 31 32 /*---------------------------------------------------------------------------- 33 * ADPCM decode tables 34 *---------------------------------------------------------------------------- 35 */ 36 const EAS_I16 imaIndexTable[16] = 37 { 38 -1, -1, -1, -1, 2, 4, 6, 8, 39 -1, -1, -1, -1, 2, 4, 6, 8 40 }; 41 42 const EAS_I16 imaStepSizeTable[89] = 43 { 44 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 45 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 46 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 47 130, 143, 157, 173, 190, 209, 230, 253, 279, 307, 48 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 49 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 50 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358, 51 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899, 52 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767 53 }; 54 55