56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/* brrUtils - BRR audio codec utilities
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* Copyright (C) 2022 tildearrow
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef _BRR_UTILS_H
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#define _BRR_UTILS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* read len samples from buf, encode in BRR and output to out.
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* @param buf input data.
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* @param out output buffer. shall be at least 9*((15+len)/16) shorts in size (9 more if loopStart is not -1!)
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* @param len input length (should be a multiple of 16. if it isn't, the output will be padded).
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* @param loopStart beginning of loop area (may be -1 for no loop). this is used to ensure the respective block has no filter in order to loop properly.
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* @param emphasis apply filter to compensate for Gaussian interpolation high frequency loss.
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* @return number of written samples.
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*/
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long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigned char emphasis);
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/**
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* read len bytes from buf, decode BRR and output to out.
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* @param buf input data.
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* @param out output buffer. shall be at least 16*(len/9) shorts in size.
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* @param len input length (shall be a multiple of 9).
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* @param emphasis apply filter to simulate Gaussian interpolation high frequency loss.
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* @return number of written bytes.
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*/
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long brrDecode(unsigned char* buf, short* out, long len, unsigned char emphasis);
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#ifdef __cplusplus
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}
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#endif
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#endif
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