1 /* 2 * Copyright (c) 2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_APACHE_LICENSE_HEADER_START@ 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 * @APPLE_APACHE_LICENSE_HEADER_END@ 19 */ 20 21 /* 22 File: dplib.h 23 24 Contains: Dynamic Predictor routines 25 26 Copyright: Copyright (C) 2001-2011 Apple, Inc. 27 */ 28 29 #ifndef __DPLIB_H__ 30 #define __DPLIB_H__ 31 32 #include <stdint.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 // defines 39 40 #define DENSHIFT_MAX 15 41 #define DENSHIFT_DEFAULT 9 42 #define AINIT 38 43 #define BINIT (-29) 44 #define CINIT (-2) 45 #define NUMCOEPAIRS 16 46 47 // prototypes 48 49 void init_coefs( int16_t * coefs, uint32_t denshift, int32_t numPairs ); 50 void copy_coefs( int16_t * srcCoefs, int16_t * dstCoefs, int32_t numPairs ); 51 52 // NOTE: these routines read at least "numactive" samples so the i/o buffers must be at least that big 53 54 void pc_block( int32_t * in, int32_t * pc, int32_t num, int16_t * coefs, int32_t numactive, uint32_t chanbits, uint32_t denshift ); 55 void unpc_block( int32_t * pc, int32_t * out, int32_t num, int16_t * coefs, int32_t numactive, uint32_t chanbits, uint32_t denshift ); 56 57 #ifdef __cplusplus 58 } 59 #endif 60 61 #endif /* __DPLIB_H__ */ 62