62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
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/*
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* Copyright (c) 2011 Apple Inc. All rights reserved.
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*
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* @APPLE_APACHE_LICENSE_HEADER_START@
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @APPLE_APACHE_LICENSE_HEADER_END@
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*/
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/*
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File: dplib.h
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Contains: Dynamic Predictor routines
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Copyright: Copyright (C) 2001-2011 Apple, Inc.
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*/
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#ifndef __DPLIB_H__
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#define __DPLIB_H__
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// defines
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#define DENSHIFT_MAX 15
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#define DENSHIFT_DEFAULT 9
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#define AINIT 38
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#define BINIT (-29)
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#define CINIT (-2)
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#define NUMCOEPAIRS 16
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// prototypes
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void init_coefs( int16_t * coefs, uint32_t denshift, int32_t numPairs );
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void copy_coefs( int16_t * srcCoefs, int16_t * dstCoefs, int32_t numPairs );
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// NOTE: these routines read at least "numactive" samples so the i/o buffers must be at least that big
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void pc_block( int32_t * in, int32_t * pc, int32_t num, int16_t * coefs, int32_t numactive, uint32_t chanbits, uint32_t denshift );
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void unpc_block( int32_t * pc, int32_t * out, int32_t num, int16_t * coefs, int32_t numactive, uint32_t chanbits, uint32_t denshift );
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#ifdef __cplusplus
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}
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#endif
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#endif /* __DPLIB_H__ */
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