448 lines
15 KiB
C
448 lines
15 KiB
C
/* $NetBSD: mulaw.c,v 1.18 2001/11/13 05:32:50 lukem Exp $ */
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/*
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* Copyright (c) 1991-1993 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.18 2001/11/13 05:32:50 lukem Exp $");
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#include <sys/types.h>
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#include <sys/audioio.h>
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#include <dev/mulaw.h>
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/*
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* This table converts a (8 bit) mulaw value to a 16 bit value.
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* The 16 bits are represented as an array of two bytes for easier access
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* to the individual bytes.
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*/
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static const u_char mulawtolin16[256][2] = {
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{0x02,0x84}, {0x06,0x84}, {0x0a,0x84}, {0x0e,0x84},
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{0x12,0x84}, {0x16,0x84}, {0x1a,0x84}, {0x1e,0x84},
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{0x22,0x84}, {0x26,0x84}, {0x2a,0x84}, {0x2e,0x84},
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{0x32,0x84}, {0x36,0x84}, {0x3a,0x84}, {0x3e,0x84},
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{0x41,0x84}, {0x43,0x84}, {0x45,0x84}, {0x47,0x84},
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{0x49,0x84}, {0x4b,0x84}, {0x4d,0x84}, {0x4f,0x84},
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{0x51,0x84}, {0x53,0x84}, {0x55,0x84}, {0x57,0x84},
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{0x59,0x84}, {0x5b,0x84}, {0x5d,0x84}, {0x5f,0x84},
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{0x61,0x04}, {0x62,0x04}, {0x63,0x04}, {0x64,0x04},
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{0x65,0x04}, {0x66,0x04}, {0x67,0x04}, {0x68,0x04},
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{0x69,0x04}, {0x6a,0x04}, {0x6b,0x04}, {0x6c,0x04},
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{0x6d,0x04}, {0x6e,0x04}, {0x6f,0x04}, {0x70,0x04},
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{0x70,0xc4}, {0x71,0x44}, {0x71,0xc4}, {0x72,0x44},
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{0x72,0xc4}, {0x73,0x44}, {0x73,0xc4}, {0x74,0x44},
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{0x74,0xc4}, {0x75,0x44}, {0x75,0xc4}, {0x76,0x44},
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{0x76,0xc4}, {0x77,0x44}, {0x77,0xc4}, {0x78,0x44},
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{0x78,0xa4}, {0x78,0xe4}, {0x79,0x24}, {0x79,0x64},
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{0x79,0xa4}, {0x79,0xe4}, {0x7a,0x24}, {0x7a,0x64},
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{0x7a,0xa4}, {0x7a,0xe4}, {0x7b,0x24}, {0x7b,0x64},
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{0x7b,0xa4}, {0x7b,0xe4}, {0x7c,0x24}, {0x7c,0x64},
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{0x7c,0x94}, {0x7c,0xb4}, {0x7c,0xd4}, {0x7c,0xf4},
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{0x7d,0x14}, {0x7d,0x34}, {0x7d,0x54}, {0x7d,0x74},
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{0x7d,0x94}, {0x7d,0xb4}, {0x7d,0xd4}, {0x7d,0xf4},
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{0x7e,0x14}, {0x7e,0x34}, {0x7e,0x54}, {0x7e,0x74},
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{0x7e,0x8c}, {0x7e,0x9c}, {0x7e,0xac}, {0x7e,0xbc},
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{0x7e,0xcc}, {0x7e,0xdc}, {0x7e,0xec}, {0x7e,0xfc},
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{0x7f,0x0c}, {0x7f,0x1c}, {0x7f,0x2c}, {0x7f,0x3c},
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{0x7f,0x4c}, {0x7f,0x5c}, {0x7f,0x6c}, {0x7f,0x7c},
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{0x7f,0x88}, {0x7f,0x90}, {0x7f,0x98}, {0x7f,0xa0},
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{0x7f,0xa8}, {0x7f,0xb0}, {0x7f,0xb8}, {0x7f,0xc0},
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{0x7f,0xc8}, {0x7f,0xd0}, {0x7f,0xd8}, {0x7f,0xe0},
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{0x7f,0xe8}, {0x7f,0xf0}, {0x7f,0xf8}, {0x80,0x00},
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{0xfd,0x7c}, {0xf9,0x7c}, {0xf5,0x7c}, {0xf1,0x7c},
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{0xed,0x7c}, {0xe9,0x7c}, {0xe5,0x7c}, {0xe1,0x7c},
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{0xdd,0x7c}, {0xd9,0x7c}, {0xd5,0x7c}, {0xd1,0x7c},
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{0xcd,0x7c}, {0xc9,0x7c}, {0xc5,0x7c}, {0xc1,0x7c},
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{0xbe,0x7c}, {0xbc,0x7c}, {0xba,0x7c}, {0xb8,0x7c},
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{0xb6,0x7c}, {0xb4,0x7c}, {0xb2,0x7c}, {0xb0,0x7c},
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{0xae,0x7c}, {0xac,0x7c}, {0xaa,0x7c}, {0xa8,0x7c},
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{0xa6,0x7c}, {0xa4,0x7c}, {0xa2,0x7c}, {0xa0,0x7c},
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{0x9e,0xfc}, {0x9d,0xfc}, {0x9c,0xfc}, {0x9b,0xfc},
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{0x9a,0xfc}, {0x99,0xfc}, {0x98,0xfc}, {0x97,0xfc},
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{0x96,0xfc}, {0x95,0xfc}, {0x94,0xfc}, {0x93,0xfc},
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{0x92,0xfc}, {0x91,0xfc}, {0x90,0xfc}, {0x8f,0xfc},
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{0x8f,0x3c}, {0x8e,0xbc}, {0x8e,0x3c}, {0x8d,0xbc},
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{0x8d,0x3c}, {0x8c,0xbc}, {0x8c,0x3c}, {0x8b,0xbc},
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{0x8b,0x3c}, {0x8a,0xbc}, {0x8a,0x3c}, {0x89,0xbc},
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{0x89,0x3c}, {0x88,0xbc}, {0x88,0x3c}, {0x87,0xbc},
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{0x87,0x5c}, {0x87,0x1c}, {0x86,0xdc}, {0x86,0x9c},
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{0x86,0x5c}, {0x86,0x1c}, {0x85,0xdc}, {0x85,0x9c},
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{0x85,0x5c}, {0x85,0x1c}, {0x84,0xdc}, {0x84,0x9c},
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{0x84,0x5c}, {0x84,0x1c}, {0x83,0xdc}, {0x83,0x9c},
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{0x83,0x6c}, {0x83,0x4c}, {0x83,0x2c}, {0x83,0x0c},
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{0x82,0xec}, {0x82,0xcc}, {0x82,0xac}, {0x82,0x8c},
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{0x82,0x6c}, {0x82,0x4c}, {0x82,0x2c}, {0x82,0x0c},
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{0x81,0xec}, {0x81,0xcc}, {0x81,0xac}, {0x81,0x8c},
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{0x81,0x74}, {0x81,0x64}, {0x81,0x54}, {0x81,0x44},
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{0x81,0x34}, {0x81,0x24}, {0x81,0x14}, {0x81,0x04},
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{0x80,0xf4}, {0x80,0xe4}, {0x80,0xd4}, {0x80,0xc4},
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{0x80,0xb4}, {0x80,0xa4}, {0x80,0x94}, {0x80,0x84},
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{0x80,0x78}, {0x80,0x70}, {0x80,0x68}, {0x80,0x60},
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{0x80,0x58}, {0x80,0x50}, {0x80,0x48}, {0x80,0x40},
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{0x80,0x38}, {0x80,0x30}, {0x80,0x28}, {0x80,0x20},
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{0x80,0x18}, {0x80,0x10}, {0x80,0x08}, {0x80,0x00},
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};
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static const u_char lintomulaw[256] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
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0x01, 0x02, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03,
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0x03, 0x04, 0x04, 0x04, 0x04, 0x05, 0x05, 0x05,
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0x05, 0x06, 0x06, 0x06, 0x06, 0x07, 0x07, 0x07,
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0x07, 0x08, 0x08, 0x08, 0x08, 0x09, 0x09, 0x09,
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0x09, 0x0a, 0x0a, 0x0a, 0x0a, 0x0b, 0x0b, 0x0b,
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0x0b, 0x0c, 0x0c, 0x0c, 0x0c, 0x0d, 0x0d, 0x0d,
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0x0d, 0x0e, 0x0e, 0x0e, 0x0e, 0x0f, 0x0f, 0x0f,
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0x0f, 0x10, 0x10, 0x11, 0x11, 0x12, 0x12, 0x13,
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0x13, 0x14, 0x14, 0x15, 0x15, 0x16, 0x16, 0x17,
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0x17, 0x18, 0x18, 0x19, 0x19, 0x1a, 0x1a, 0x1b,
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0x1b, 0x1c, 0x1c, 0x1d, 0x1d, 0x1e, 0x1e, 0x1f,
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0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26,
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0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e,
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0x2f, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c,
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0x3e, 0x41, 0x45, 0x49, 0x4d, 0x53, 0x5b, 0x67,
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0xff, 0xe7, 0xdb, 0xd3, 0xcd, 0xc9, 0xc5, 0xc1,
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0xbe, 0xbc, 0xba, 0xb8, 0xb6, 0xb4, 0xb2, 0xb0,
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0xaf, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa8,
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0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0,
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0x9f, 0x9f, 0x9e, 0x9e, 0x9d, 0x9d, 0x9c, 0x9c,
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0x9b, 0x9b, 0x9a, 0x9a, 0x99, 0x99, 0x98, 0x98,
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0x97, 0x97, 0x96, 0x96, 0x95, 0x95, 0x94, 0x94,
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0x93, 0x93, 0x92, 0x92, 0x91, 0x91, 0x90, 0x90,
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0x8f, 0x8f, 0x8f, 0x8f, 0x8e, 0x8e, 0x8e, 0x8e,
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0x8d, 0x8d, 0x8d, 0x8d, 0x8c, 0x8c, 0x8c, 0x8c,
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0x8b, 0x8b, 0x8b, 0x8b, 0x8a, 0x8a, 0x8a, 0x8a,
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0x89, 0x89, 0x89, 0x89, 0x88, 0x88, 0x88, 0x88,
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0x87, 0x87, 0x87, 0x87, 0x86, 0x86, 0x86, 0x86,
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0x85, 0x85, 0x85, 0x85, 0x84, 0x84, 0x84, 0x84,
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0x83, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x82,
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0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80,
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};
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static const u_char alawtolin16[256][2] = {
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{0x6a,0x80}, {0x6b,0x80}, {0x68,0x80}, {0x69,0x80},
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{0x6e,0x80}, {0x6f,0x80}, {0x6c,0x80}, {0x6d,0x80},
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{0x62,0x80}, {0x63,0x80}, {0x60,0x80}, {0x61,0x80},
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{0x66,0x80}, {0x67,0x80}, {0x64,0x80}, {0x65,0x80},
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{0x75,0x40}, {0x75,0xc0}, {0x74,0x40}, {0x74,0xc0},
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{0x77,0x40}, {0x77,0xc0}, {0x76,0x40}, {0x76,0xc0},
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{0x71,0x40}, {0x71,0xc0}, {0x70,0x40}, {0x70,0xc0},
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{0x73,0x40}, {0x73,0xc0}, {0x72,0x40}, {0x72,0xc0},
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{0x2a,0x00}, {0x2e,0x00}, {0x22,0x00}, {0x26,0x00},
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{0x3a,0x00}, {0x3e,0x00}, {0x32,0x00}, {0x36,0x00},
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{0x0a,0x00}, {0x0e,0x00}, {0x02,0x00}, {0x06,0x00},
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{0x1a,0x00}, {0x1e,0x00}, {0x12,0x00}, {0x16,0x00},
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{0x55,0x00}, {0x57,0x00}, {0x51,0x00}, {0x53,0x00},
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{0x5d,0x00}, {0x5f,0x00}, {0x59,0x00}, {0x5b,0x00},
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{0x45,0x00}, {0x47,0x00}, {0x41,0x00}, {0x43,0x00},
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{0x4d,0x00}, {0x4f,0x00}, {0x49,0x00}, {0x4b,0x00},
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{0x7e,0xa8}, {0x7e,0xb8}, {0x7e,0x88}, {0x7e,0x98},
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{0x7e,0xe8}, {0x7e,0xf8}, {0x7e,0xc8}, {0x7e,0xd8},
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{0x7e,0x28}, {0x7e,0x38}, {0x7e,0x08}, {0x7e,0x18},
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{0x7e,0x68}, {0x7e,0x78}, {0x7e,0x48}, {0x7e,0x58},
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{0x7f,0xa8}, {0x7f,0xb8}, {0x7f,0x88}, {0x7f,0x98},
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{0x7f,0xe8}, {0x7f,0xf8}, {0x7f,0xc8}, {0x7f,0xd8},
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{0x7f,0x28}, {0x7f,0x38}, {0x7f,0x08}, {0x7f,0x18},
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{0x7f,0x68}, {0x7f,0x78}, {0x7f,0x48}, {0x7f,0x58},
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{0x7a,0xa0}, {0x7a,0xe0}, {0x7a,0x20}, {0x7a,0x60},
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{0x7b,0xa0}, {0x7b,0xe0}, {0x7b,0x20}, {0x7b,0x60},
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{0x78,0xa0}, {0x78,0xe0}, {0x78,0x20}, {0x78,0x60},
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{0x79,0xa0}, {0x79,0xe0}, {0x79,0x20}, {0x79,0x60},
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{0x7d,0x50}, {0x7d,0x70}, {0x7d,0x10}, {0x7d,0x30},
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{0x7d,0xd0}, {0x7d,0xf0}, {0x7d,0x90}, {0x7d,0xb0},
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{0x7c,0x50}, {0x7c,0x70}, {0x7c,0x10}, {0x7c,0x30},
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{0x7c,0xd0}, {0x7c,0xf0}, {0x7c,0x90}, {0x7c,0xb0},
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{0x95,0x80}, {0x94,0x80}, {0x97,0x80}, {0x96,0x80},
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{0x91,0x80}, {0x90,0x80}, {0x93,0x80}, {0x92,0x80},
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{0x9d,0x80}, {0x9c,0x80}, {0x9f,0x80}, {0x9e,0x80},
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{0x99,0x80}, {0x98,0x80}, {0x9b,0x80}, {0x9a,0x80},
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{0x8a,0xc0}, {0x8a,0x40}, {0x8b,0xc0}, {0x8b,0x40},
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{0x88,0xc0}, {0x88,0x40}, {0x89,0xc0}, {0x89,0x40},
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{0x8e,0xc0}, {0x8e,0x40}, {0x8f,0xc0}, {0x8f,0x40},
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{0x8c,0xc0}, {0x8c,0x40}, {0x8d,0xc0}, {0x8d,0x40},
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{0xd6,0x00}, {0xd2,0x00}, {0xde,0x00}, {0xda,0x00},
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{0xc6,0x00}, {0xc2,0x00}, {0xce,0x00}, {0xca,0x00},
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{0xf6,0x00}, {0xf2,0x00}, {0xfe,0x00}, {0xfa,0x00},
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{0xe6,0x00}, {0xe2,0x00}, {0xee,0x00}, {0xea,0x00},
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{0xab,0x00}, {0xa9,0x00}, {0xaf,0x00}, {0xad,0x00},
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{0xa3,0x00}, {0xa1,0x00}, {0xa7,0x00}, {0xa5,0x00},
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{0xbb,0x00}, {0xb9,0x00}, {0xbf,0x00}, {0xbd,0x00},
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{0xb3,0x00}, {0xb1,0x00}, {0xb7,0x00}, {0xb5,0x00},
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{0x81,0x58}, {0x81,0x48}, {0x81,0x78}, {0x81,0x68},
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{0x81,0x18}, {0x81,0x08}, {0x81,0x38}, {0x81,0x28},
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{0x81,0xd8}, {0x81,0xc8}, {0x81,0xf8}, {0x81,0xe8},
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{0x81,0x98}, {0x81,0x88}, {0x81,0xb8}, {0x81,0xa8},
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{0x80,0x58}, {0x80,0x48}, {0x80,0x78}, {0x80,0x68},
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{0x80,0x18}, {0x80,0x08}, {0x80,0x38}, {0x80,0x28},
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{0x80,0xd8}, {0x80,0xc8}, {0x80,0xf8}, {0x80,0xe8},
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{0x80,0x98}, {0x80,0x88}, {0x80,0xb8}, {0x80,0xa8},
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{0x85,0x60}, {0x85,0x20}, {0x85,0xe0}, {0x85,0xa0},
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{0x84,0x60}, {0x84,0x20}, {0x84,0xe0}, {0x84,0xa0},
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{0x87,0x60}, {0x87,0x20}, {0x87,0xe0}, {0x87,0xa0},
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{0x86,0x60}, {0x86,0x20}, {0x86,0xe0}, {0x86,0xa0},
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{0x82,0xb0}, {0x82,0x90}, {0x82,0xf0}, {0x82,0xd0},
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{0x82,0x30}, {0x82,0x10}, {0x82,0x70}, {0x82,0x50},
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{0x83,0xb0}, {0x83,0x90}, {0x83,0xf0}, {0x83,0xd0},
|
|
{0x83,0x30}, {0x83,0x10}, {0x83,0x70}, {0x83,0x50},
|
|
};
|
|
|
|
static const u_char lintoalaw[256] = {
|
|
0x2a, 0x2a, 0x2a, 0x2a, 0x2b, 0x2b, 0x2b, 0x2b,
|
|
0x28, 0x28, 0x28, 0x28, 0x29, 0x29, 0x29, 0x29,
|
|
0x2e, 0x2e, 0x2e, 0x2e, 0x2f, 0x2f, 0x2f, 0x2f,
|
|
0x2c, 0x2c, 0x2c, 0x2c, 0x2d, 0x2d, 0x2d, 0x2d,
|
|
0x22, 0x22, 0x22, 0x22, 0x23, 0x23, 0x23, 0x23,
|
|
0x20, 0x20, 0x20, 0x20, 0x21, 0x21, 0x21, 0x21,
|
|
0x26, 0x26, 0x26, 0x26, 0x27, 0x27, 0x27, 0x27,
|
|
0x24, 0x24, 0x24, 0x24, 0x25, 0x25, 0x25, 0x25,
|
|
0x3a, 0x3a, 0x3b, 0x3b, 0x38, 0x38, 0x39, 0x39,
|
|
0x3e, 0x3e, 0x3f, 0x3f, 0x3c, 0x3c, 0x3d, 0x3d,
|
|
0x32, 0x32, 0x33, 0x33, 0x30, 0x30, 0x31, 0x31,
|
|
0x36, 0x36, 0x37, 0x37, 0x34, 0x34, 0x35, 0x35,
|
|
0x0a, 0x0b, 0x08, 0x09, 0x0e, 0x0f, 0x0c, 0x0d,
|
|
0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
|
|
0x1a, 0x18, 0x1e, 0x1c, 0x12, 0x10, 0x16, 0x14,
|
|
0x6a, 0x6e, 0x62, 0x66, 0x7a, 0x72, 0x4a, 0x5a,
|
|
0xd5, 0xc5, 0xf5, 0xfd, 0xe5, 0xe1, 0xed, 0xe9,
|
|
0x95, 0x97, 0x91, 0x93, 0x9d, 0x9f, 0x99, 0x9b,
|
|
0x85, 0x84, 0x87, 0x86, 0x81, 0x80, 0x83, 0x82,
|
|
0x8d, 0x8c, 0x8f, 0x8e, 0x89, 0x88, 0x8b, 0x8a,
|
|
0xb5, 0xb5, 0xb4, 0xb4, 0xb7, 0xb7, 0xb6, 0xb6,
|
|
0xb1, 0xb1, 0xb0, 0xb0, 0xb3, 0xb3, 0xb2, 0xb2,
|
|
0xbd, 0xbd, 0xbc, 0xbc, 0xbf, 0xbf, 0xbe, 0xbe,
|
|
0xb9, 0xb9, 0xb8, 0xb8, 0xbb, 0xbb, 0xba, 0xba,
|
|
0xa5, 0xa5, 0xa5, 0xa5, 0xa4, 0xa4, 0xa4, 0xa4,
|
|
0xa7, 0xa7, 0xa7, 0xa7, 0xa6, 0xa6, 0xa6, 0xa6,
|
|
0xa1, 0xa1, 0xa1, 0xa1, 0xa0, 0xa0, 0xa0, 0xa0,
|
|
0xa3, 0xa3, 0xa3, 0xa3, 0xa2, 0xa2, 0xa2, 0xa2,
|
|
0xad, 0xad, 0xad, 0xad, 0xac, 0xac, 0xac, 0xac,
|
|
0xaf, 0xaf, 0xaf, 0xaf, 0xae, 0xae, 0xae, 0xae,
|
|
0xa9, 0xa9, 0xa9, 0xa9, 0xa8, 0xa8, 0xa8, 0xa8,
|
|
0xab, 0xab, 0xab, 0xab, 0xaa, 0xaa, 0xaa, 0xaa,
|
|
};
|
|
|
|
void
|
|
mulaw_to_ulinear8(void *v, u_char *p, int cc)
|
|
{
|
|
/* Use the 16 bit table for 8 bits too. */
|
|
while (--cc >= 0) {
|
|
*p = mulawtolin16[*p][0];
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
mulaw_to_slinear8(void *v, u_char *p, int cc)
|
|
{
|
|
/* Use the 16 bit table for 8 bits too. */
|
|
while (--cc >= 0) {
|
|
*p = mulawtolin16[*p][0] ^ 0x80;
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
mulaw_to_ulinear16_le(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[1] = mulawtolin16[*p][0];
|
|
q[0] = mulawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
mulaw_to_ulinear16_be(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[0] = mulawtolin16[*p][0];
|
|
q[1] = mulawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
mulaw_to_slinear16_le(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[1] = mulawtolin16[*p][0] ^ 0x80;
|
|
q[0] = mulawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
mulaw_to_slinear16_be(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[0] = mulawtolin16[*p][0] ^ 0x80;
|
|
q[1] = mulawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
ulinear8_to_mulaw(void *v, u_char *p, int cc)
|
|
{
|
|
while (--cc >= 0) {
|
|
*p = lintomulaw[*p];
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
slinear8_to_mulaw(void *v, u_char *p, int cc)
|
|
{
|
|
while (--cc >= 0) {
|
|
*p = lintomulaw[*p ^ 0x80];
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_ulinear8(void *v, u_char *p, int cc)
|
|
{
|
|
/* Use the 16 bit table for 8 bits too. */
|
|
while (--cc >= 0) {
|
|
*p = alawtolin16[*p][0];
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_slinear8(void *v, u_char *p, int cc)
|
|
{
|
|
/* Use the 16 bit table for 8 bits too. */
|
|
while (--cc >= 0) {
|
|
*p = alawtolin16[*p][0] ^ 0x80;
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_ulinear16_le(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[1] = alawtolin16[*p][0];
|
|
q[0] = alawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_ulinear16_be(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[0] = alawtolin16[*p][0];
|
|
q[1] = alawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_slinear16_le(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[1] = alawtolin16[*p][0] ^ 0x80;
|
|
q[0] = alawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
alaw_to_slinear16_be(void *v, u_char *p, int cc)
|
|
{
|
|
u_char *q = p;
|
|
|
|
p += cc;
|
|
q += cc << 1;
|
|
while (--cc >= 0) {
|
|
--p;
|
|
q -= 2;
|
|
q[0] = alawtolin16[*p][0] ^ 0x80;
|
|
q[1] = alawtolin16[*p][1];
|
|
}
|
|
}
|
|
|
|
void
|
|
ulinear8_to_alaw(void *v, u_char *p, int cc)
|
|
{
|
|
while (--cc >= 0) {
|
|
*p = lintoalaw[*p];
|
|
++p;
|
|
}
|
|
}
|
|
|
|
void
|
|
slinear8_to_alaw(void *v, u_char *p, int cc)
|
|
{
|
|
while (--cc >= 0) {
|
|
*p = lintoalaw[*p ^ 0x80];
|
|
++p;
|
|
}
|
|
}
|