76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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/*
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Audio File Library
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Copyright (C) 2000, Silicon Graphics, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301 USA
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*/
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/*
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pcm.h
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This file defines various constants for PCM mapping.
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*/
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#ifndef PCM_H
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#define PCM_H
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/*
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SLOPE_INTN = 2^(N-1)
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*/
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#define SLOPE_INT8 (128.0)
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#define SLOPE_INT16 (32768.0)
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#define SLOPE_INT24 (8388608.0)
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#define SLOPE_INT32 (2147483648.0)
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/*
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INTERCEPT_U_INTN = 2^(N-1)
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*/
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#define INTERCEPT_U_INT8 (128.0)
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#define INTERCEPT_U_INT16 (32768.0)
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#define INTERCEPT_U_INT24 (8388608.0)
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#define INTERCEPT_U_INT32 (2147483648.0)
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/*
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MIN_INTN = -(2^(N-1))
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*/
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#define MIN_INT8 (-128.0)
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#define MIN_INT16 (-32768.0)
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#define MIN_INT24 (-8388608.0)
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#define MIN_INT32 (-2147483648.0)
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/*
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MAX_INTN = 2^(N-1) - 1
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*/
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#define MAX_INT8 127.0
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#define MAX_INT16 32767.0
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#define MAX_INT24 8388607.0
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#define MAX_INT32 2147483647.0
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/*
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MAX_U_INTN = 2^N - 1
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*/
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#define MAX_U_INT8 255.0
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#define MAX_U_INT16 65535.0
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#define MAX_U_INT24 16777215.0
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#define MAX_U_INT32 4294967295.0
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extern const PCMInfo _af_default_signed_integer_pcm_mappings[];
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extern const PCMInfo _af_default_unsigned_integer_pcm_mappings[];
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extern const PCMInfo _af_default_float_pcm_mapping;
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extern const PCMInfo _af_default_double_pcm_mapping;
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#endif
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