/* $NetBSD: mulaw.c,v 1.28.42.3 2018/01/09 19:35:03 snj Exp $ */ /* * Copyright (c) 1991-1993 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Computer Systems * Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include __KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.28.42.3 2018/01/09 19:35:03 snj Exp $"); #include #include #include #include #include /* #define MULAW_DEBUG */ #ifdef MULAW_DEBUG # define DPRINTF(x) printf x #else # define DPRINTF(x) #endif /* * This table converts a (8 bit) mu-law value to a 16 bit value. * The 16 bits are represented as an array of two bytes for easier access * to the individual bytes. */ static const uint8_t mulawtolin16[256][2] = { {0x02,0x84}, {0x06,0x84}, {0x0a,0x84}, {0x0e,0x84}, {0x12,0x84}, {0x16,0x84}, {0x1a,0x84}, {0x1e,0x84}, {0x22,0x84}, {0x26,0x84}, {0x2a,0x84}, {0x2e,0x84}, {0x32,0x84}, {0x36,0x84}, {0x3a,0x84}, {0x3e,0x84}, {0x41,0x84}, {0x43,0x84}, {0x45,0x84}, {0x47,0x84}, {0x49,0x84}, {0x4b,0x84}, {0x4d,0x84}, {0x4f,0x84}, {0x51,0x84}, {0x53,0x84}, {0x55,0x84}, {0x57,0x84}, {0x59,0x84}, {0x5b,0x84}, {0x5d,0x84}, {0x5f,0x84}, {0x61,0x04}, {0x62,0x04}, {0x63,0x04}, {0x64,0x04}, {0x65,0x04}, {0x66,0x04}, {0x67,0x04}, {0x68,0x04}, {0x69,0x04}, {0x6a,0x04}, {0x6b,0x04}, {0x6c,0x04}, {0x6d,0x04}, {0x6e,0x04}, {0x6f,0x04}, {0x70,0x04}, {0x70,0xc4}, {0x71,0x44}, {0x71,0xc4}, {0x72,0x44}, {0x72,0xc4}, {0x73,0x44}, {0x73,0xc4}, {0x74,0x44}, {0x74,0xc4}, {0x75,0x44}, {0x75,0xc4}, {0x76,0x44}, {0x76,0xc4}, {0x77,0x44}, {0x77,0xc4}, {0x78,0x44}, {0x78,0xa4}, {0x78,0xe4}, {0x79,0x24}, {0x79,0x64}, {0x79,0xa4}, {0x79,0xe4}, {0x7a,0x24}, {0x7a,0x64}, {0x7a,0xa4}, {0x7a,0xe4}, {0x7b,0x24}, {0x7b,0x64}, {0x7b,0xa4}, {0x7b,0xe4}, {0x7c,0x24}, {0x7c,0x64}, {0x7c,0x94}, {0x7c,0xb4}, {0x7c,0xd4}, {0x7c,0xf4}, {0x7d,0x14}, {0x7d,0x34}, {0x7d,0x54}, {0x7d,0x74}, {0x7d,0x94}, {0x7d,0xb4}, {0x7d,0xd4}, {0x7d,0xf4}, {0x7e,0x14}, {0x7e,0x34}, {0x7e,0x54}, {0x7e,0x74}, {0x7e,0x8c}, {0x7e,0x9c}, {0x7e,0xac}, {0x7e,0xbc}, {0x7e,0xcc}, {0x7e,0xdc}, {0x7e,0xec}, {0x7e,0xfc}, {0x7f,0x0c}, {0x7f,0x1c}, {0x7f,0x2c}, {0x7f,0x3c}, {0x7f,0x4c}, {0x7f,0x5c}, {0x7f,0x6c}, {0x7f,0x7c}, {0x7f,0x88}, {0x7f,0x90}, {0x7f,0x98}, {0x7f,0xa0}, {0x7f,0xa8}, {0x7f,0xb0}, {0x7f,0xb8}, {0x7f,0xc0}, {0x7f,0xc8}, {0x7f,0xd0}, {0x7f,0xd8}, {0x7f,0xe0}, {0x7f,0xe8}, {0x7f,0xf0}, {0x7f,0xf8}, {0x80,0x00}, {0xfd,0x7c}, {0xf9,0x7c}, {0xf5,0x7c}, {0xf1,0x7c}, {0xed,0x7c}, {0xe9,0x7c}, {0xe5,0x7c}, {0xe1,0x7c}, {0xdd,0x7c}, {0xd9,0x7c}, {0xd5,0x7c}, {0xd1,0x7c}, {0xcd,0x7c}, {0xc9,0x7c}, {0xc5,0x7c}, {0xc1,0x7c}, {0xbe,0x7c}, {0xbc,0x7c}, {0xba,0x7c}, {0xb8,0x7c}, {0xb6,0x7c}, {0xb4,0x7c}, {0xb2,0x7c}, {0xb0,0x7c}, {0xae,0x7c}, {0xac,0x7c}, {0xaa,0x7c}, {0xa8,0x7c}, {0xa6,0x7c}, {0xa4,0x7c}, {0xa2,0x7c}, {0xa0,0x7c}, {0x9e,0xfc}, {0x9d,0xfc}, {0x9c,0xfc}, {0x9b,0xfc}, {0x9a,0xfc}, {0x99,0xfc}, {0x98,0xfc}, {0x97,0xfc}, {0x96,0xfc}, {0x95,0xfc}, {0x94,0xfc}, {0x93,0xfc}, {0x92,0xfc}, {0x91,0xfc}, {0x90,0xfc}, {0x8f,0xfc}, {0x8f,0x3c}, {0x8e,0xbc}, {0x8e,0x3c}, {0x8d,0xbc}, {0x8d,0x3c}, {0x8c,0xbc}, {0x8c,0x3c}, {0x8b,0xbc}, {0x8b,0x3c}, {0x8a,0xbc}, {0x8a,0x3c}, {0x89,0xbc}, {0x89,0x3c}, {0x88,0xbc}, {0x88,0x3c}, {0x87,0xbc}, {0x87,0x5c}, {0x87,0x1c}, {0x86,0xdc}, {0x86,0x9c}, {0x86,0x5c}, {0x86,0x1c}, {0x85,0xdc}, {0x85,0x9c}, {0x85,0x5c}, {0x85,0x1c}, {0x84,0xdc}, {0x84,0x9c}, {0x84,0x5c}, {0x84,0x1c}, {0x83,0xdc}, {0x83,0x9c}, {0x83,0x6c}, {0x83,0x4c}, {0x83,0x2c}, {0x83,0x0c}, {0x82,0xec}, {0x82,0xcc}, {0x82,0xac}, {0x82,0x8c}, {0x82,0x6c}, {0x82,0x4c}, {0x82,0x2c}, {0x82,0x0c}, {0x81,0xec}, {0x81,0xcc}, {0x81,0xac}, {0x81,0x8c}, {0x81,0x74}, {0x81,0x64}, {0x81,0x54}, {0x81,0x44}, {0x81,0x34}, {0x81,0x24}, {0x81,0x14}, {0x81,0x04}, {0x80,0xf4}, {0x80,0xe4}, {0x80,0xd4}, {0x80,0xc4}, {0x80,0xb4}, {0x80,0xa4}, {0x80,0x94}, {0x80,0x84}, {0x80,0x78}, {0x80,0x70}, {0x80,0x68}, {0x80,0x60}, {0x80,0x58}, {0x80,0x50}, {0x80,0x48}, {0x80,0x40}, {0x80,0x38}, {0x80,0x30}, {0x80,0x28}, {0x80,0x20}, {0x80,0x18}, {0x80,0x10}, {0x80,0x08}, {0x80,0x00}, }; static const uint8_t lintomulaw[256] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x03, 0x03, 0x03, 0x03, 0x04, 0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x05, 0x06, 0x06, 0x06, 0x06, 0x07, 0x07, 0x07, 0x07, 0x08, 0x08, 0x08, 0x08, 0x09, 0x09, 0x09, 0x09, 0x0a, 0x0a, 0x0a, 0x0a, 0x0b, 0x0b, 0x0b, 0x0b, 0x0c, 0x0c, 0x0c, 0x0c, 0x0d, 0x0d, 0x0d, 0x0d, 0x0e, 0x0e, 0x0e, 0x0e, 0x0f, 0x0f, 0x0f, 0x0f, 0x10, 0x10, 0x11, 0x11, 0x12, 0x12, 0x13, 0x13, 0x14, 0x14, 0x15, 0x15, 0x16, 0x16, 0x17, 0x17, 0x18, 0x18, 0x19, 0x19, 0x1a, 0x1a, 0x1b, 0x1b, 0x1c, 0x1c, 0x1d, 0x1d, 0x1e, 0x1e, 0x1f, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, 0x41, 0x45, 0x49, 0x4d, 0x53, 0x5b, 0x67, 0xff, 0xe7, 0xdb, 0xd3, 0xcd, 0xc9, 0xc5, 0xc1, 0xbe, 0xbc, 0xba, 0xb8, 0xb6, 0xb4, 0xb2, 0xb0, 0xaf, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa8, 0xa7, 0xa6, 0xa5, 0xa4, 0xa3, 0xa2, 0xa1, 0xa0, 0x9f, 0x9f, 0x9e, 0x9e, 0x9d, 0x9d, 0x9c, 0x9c, 0x9b, 0x9b, 0x9a, 0x9a, 0x99, 0x99, 0x98, 0x98, 0x97, 0x97, 0x96, 0x96, 0x95, 0x95, 0x94, 0x94, 0x93, 0x93, 0x92, 0x92, 0x91, 0x91, 0x90, 0x90, 0x8f, 0x8f, 0x8f, 0x8f, 0x8e, 0x8e, 0x8e, 0x8e, 0x8d, 0x8d, 0x8d, 0x8d, 0x8c, 0x8c, 0x8c, 0x8c, 0x8b, 0x8b, 0x8b, 0x8b, 0x8a, 0x8a, 0x8a, 0x8a, 0x89, 0x89, 0x89, 0x89, 0x88, 0x88, 0x88, 0x88, 0x87, 0x87, 0x87, 0x87, 0x86, 0x86, 0x86, 0x86, 0x85, 0x85, 0x85, 0x85, 0x84, 0x84, 0x84, 0x84, 0x83, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80, }; static const uint8_t alawtolin16[256][2] = { {0x6a,0x80}, {0x6b,0x80}, {0x68,0x80}, {0x69,0x80}, {0x6e,0x80}, {0x6f,0x80}, {0x6c,0x80}, {0x6d,0x80}, {0x62,0x80}, {0x63,0x80}, {0x60,0x80}, {0x61,0x80}, {0x66,0x80}, {0x67,0x80}, {0x64,0x80}, {0x65,0x80}, {0x75,0x40}, {0x75,0xc0}, {0x74,0x40}, {0x74,0xc0}, {0x77,0x40}, {0x77,0xc0}, {0x76,0x40}, {0x76,0xc0}, {0x71,0x40}, {0x71,0xc0}, {0x70,0x40}, {0x70,0xc0}, {0x73,0x40}, {0x73,0xc0}, {0x72,0x40}, {0x72,0xc0}, {0x2a,0x00}, {0x2e,0x00}, {0x22,0x00}, {0x26,0x00}, {0x3a,0x00}, {0x3e,0x00}, {0x32,0x00}, {0x36,0x00}, {0x0a,0x00}, {0x0e,0x00}, {0x02,0x00}, {0x06,0x00}, {0x1a,0x00}, {0x1e,0x00}, {0x12,0x00}, {0x16,0x00}, {0x55,0x00}, {0x57,0x00}, {0x51,0x00}, {0x53,0x00}, {0x5d,0x00}, {0x5f,0x00}, {0x59,0x00}, {0x5b,0x00}, {0x45,0x00}, {0x47,0x00}, {0x41,0x00}, {0x43,0x00}, {0x4d,0x00}, {0x4f,0x00}, {0x49,0x00}, {0x4b,0x00}, {0x7e,0xa8}, {0x7e,0xb8}, {0x7e,0x88}, {0x7e,0x98}, {0x7e,0xe8}, {0x7e,0xf8}, {0x7e,0xc8}, {0x7e,0xd8}, {0x7e,0x28}, {0x7e,0x38}, {0x7e,0x08}, {0x7e,0x18}, {0x7e,0x68}, {0x7e,0x78}, {0x7e,0x48}, {0x7e,0x58}, {0x7f,0xa8}, {0x7f,0xb8}, {0x7f,0x88}, {0x7f,0x98}, {0x7f,0xe8}, {0x7f,0xf8}, {0x7f,0xc8}, {0x7f,0xd8}, {0x7f,0x28}, {0x7f,0x38}, {0x7f,0x08}, {0x7f,0x18}, {0x7f,0x68}, {0x7f,0x78}, {0x7f,0x48}, {0x7f,0x58}, {0x7a,0xa0}, {0x7a,0xe0}, {0x7a,0x20}, {0x7a,0x60}, {0x7b,0xa0}, {0x7b,0xe0}, {0x7b,0x20}, {0x7b,0x60}, {0x78,0xa0}, {0x78,0xe0}, {0x78,0x20}, {0x78,0x60}, {0x79,0xa0}, {0x79,0xe0}, {0x79,0x20}, {0x79,0x60}, {0x7d,0x50}, {0x7d,0x70}, {0x7d,0x10}, {0x7d,0x30}, {0x7d,0xd0}, {0x7d,0xf0}, {0x7d,0x90}, {0x7d,0xb0}, {0x7c,0x50}, {0x7c,0x70}, {0x7c,0x10}, {0x7c,0x30}, {0x7c,0xd0}, {0x7c,0xf0}, {0x7c,0x90}, {0x7c,0xb0}, {0x95,0x80}, {0x94,0x80}, {0x97,0x80}, {0x96,0x80}, {0x91,0x80}, {0x90,0x80}, {0x93,0x80}, {0x92,0x80}, {0x9d,0x80}, {0x9c,0x80}, {0x9f,0x80}, {0x9e,0x80}, {0x99,0x80}, {0x98,0x80}, {0x9b,0x80}, {0x9a,0x80}, {0x8a,0xc0}, {0x8a,0x40}, {0x8b,0xc0}, {0x8b,0x40}, {0x88,0xc0}, {0x88,0x40}, {0x89,0xc0}, {0x89,0x40}, {0x8e,0xc0}, {0x8e,0x40}, {0x8f,0xc0}, {0x8f,0x40}, {0x8c,0xc0}, {0x8c,0x40}, {0x8d,0xc0}, {0x8d,0x40}, {0xd6,0x00}, {0xd2,0x00}, {0xde,0x00}, {0xda,0x00}, {0xc6,0x00}, {0xc2,0x00}, {0xce,0x00}, {0xca,0x00}, {0xf6,0x00}, {0xf2,0x00}, {0xfe,0x00}, {0xfa,0x00}, {0xe6,0x00}, {0xe2,0x00}, {0xee,0x00}, {0xea,0x00}, {0xab,0x00}, {0xa9,0x00}, {0xaf,0x00}, {0xad,0x00}, {0xa3,0x00}, {0xa1,0x00}, {0xa7,0x00}, {0xa5,0x00}, {0xbb,0x00}, {0xb9,0x00}, {0xbf,0x00}, {0xbd,0x00}, {0xb3,0x00}, {0xb1,0x00}, {0xb7,0x00}, {0xb5,0x00}, {0x81,0x58}, {0x81,0x48}, {0x81,0x78}, {0x81,0x68}, {0x81,0x18}, {0x81,0x08}, {0x81,0x38}, {0x81,0x28}, {0x81,0xd8}, {0x81,0xc8}, {0x81,0xf8}, {0x81,0xe8}, {0x81,0x98}, {0x81,0x88}, {0x81,0xb8}, {0x81,0xa8}, {0x80,0x58}, {0x80,0x48}, {0x80,0x78}, {0x80,0x68}, {0x80,0x18}, {0x80,0x08}, {0x80,0x38}, {0x80,0x28}, {0x80,0xd8}, {0x80,0xc8}, {0x80,0xf8}, {0x80,0xe8}, {0x80,0x98}, {0x80,0x88}, {0x80,0xb8}, {0x80,0xa8}, {0x85,0x60}, {0x85,0x20}, {0x85,0xe0}, {0x85,0xa0}, {0x84,0x60}, {0x84,0x20}, {0x84,0xe0}, {0x84,0xa0}, {0x87,0x60}, {0x87,0x20}, {0x87,0xe0}, {0x87,0xa0}, {0x86,0x60}, {0x86,0x20}, {0x86,0xe0}, {0x86,0xa0}, {0x82,0xb0}, {0x82,0x90}, {0x82,0xf0}, {0x82,0xd0}, {0x82,0x30}, {0x82,0x10}, {0x82,0x70}, {0x82,0x50}, {0x83,0xb0}, {0x83,0x90}, {0x83,0xf0}, {0x83,0xd0}, {0x83,0x30}, {0x83,0x10}, {0x83,0x70}, {0x83,0x50}, }; static const uint8_t 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, }; #define DEFINE_FILTER(name) \ static int \ name##_fetch_to(struct audio_softc *, stream_fetcher_t *, audio_stream_t *, int); \ stream_filter_t * \ name(struct audio_softc *sc, const audio_params_t *from, \ const audio_params_t *to) \ { \ DPRINTF(("Construct '%s' filter.\n", __func__)); \ return auconv_nocontext_filter_factory(name##_fetch_to); \ } \ static int \ name##_fetch_to(struct audio_softc *sc, stream_fetcher_t *self, \ audio_stream_t *dst, int max_used) DEFINE_FILTER(mulaw_to_linear8) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used))) return err; m = dst->end - dst->start; m = min(m, max_used); if (dst->param.encoding == AUDIO_ENCODING_ULINEAR_LE) { FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) { *d = mulawtolin16[*s][0]; } FILTER_LOOP_EPILOGUE(this->src, dst); } else { FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) { *d = mulawtolin16[*s][0] ^ 0x80; } FILTER_LOOP_EPILOGUE(this->src, dst); } return 0; } DEFINE_FILTER(mulaw_to_linear16) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 2))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[1] = mulawtolin16[s[0]][0]; d[0] = mulawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[0] = mulawtolin16[s[0]][0]; d[1] = mulawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[1] = mulawtolin16[s[0]][0] ^ 0x80; d[0] = mulawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[0] = mulawtolin16[s[0]][0] ^ 0x80; d[1] = mulawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(mulaw_to_linear24) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 3))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[2] = mulawtolin16[s[0]][0]; d[1] = mulawtolin16[s[0]][1]; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[0] = mulawtolin16[s[0]][0]; d[1] = mulawtolin16[s[0]][1]; d[2] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[2] = mulawtolin16[s[0]][0] ^ 0x80; d[1] = mulawtolin16[s[0]][1]; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[0] = mulawtolin16[s[0]][0] ^ 0x80; d[1] = mulawtolin16[s[0]][1]; d[2] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(mulaw_to_linear32) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 4))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[3] = mulawtolin16[s[0]][0]; d[2] = mulawtolin16[s[0]][1]; d[1] = 0; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[0] = mulawtolin16[s[0]][0]; d[1] = mulawtolin16[s[0]][1]; d[2] = 0; d[3] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[3] = mulawtolin16[s[0]][0] ^ 0x80; d[2] = mulawtolin16[s[0]][1]; d[1] = 0; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[0] = mulawtolin16[s[0]][0] ^ 0x80; d[1] = mulawtolin16[s[0]][1]; d[2] = 0; d[3] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(linearN_to_mulaw) { stream_filter_t *this; int hw, m, err; this = (stream_filter_t *)self; hw = this->src->param.precision / NBBY; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used * hw))) return err; m = dst->end - dst->start; m = min(m, max_used); switch (this->src->param.encoding) { case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintomulaw[s[hw - 1] ^ 0x80]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintomulaw[s[0] ^ 0x80]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintomulaw[s[hw - 1]]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintomulaw[s[0]]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]n", __func__); break; } return 0; } DEFINE_FILTER(alaw_to_linear8) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used))) return err; m = dst->end - dst->start; m = min(m, max_used); if (dst->param.encoding == AUDIO_ENCODING_ULINEAR_LE) { FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) { *d = alawtolin16[*s][0]; } FILTER_LOOP_EPILOGUE(this->src, dst); } else { /* SLINEAR */ FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) { *d = alawtolin16[*s][0] ^ 0x80; } FILTER_LOOP_EPILOGUE(this->src, dst); } return 0; } DEFINE_FILTER(alaw_to_linear16) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; /* round up to even */ if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 2))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[1] = alawtolin16[s[0]][0]; d[0] = alawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[0] = alawtolin16[s[0]][0]; d[1] = alawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[1] = alawtolin16[s[0]][0] ^ 0x80; d[0] = alawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 2, m) { d[0] = alawtolin16[s[0]][0] ^ 0x80; d[1] = alawtolin16[s[0]][1]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(alaw_to_linear24) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; /* round up to even */ if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 3))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[2] = alawtolin16[s[0]][0]; d[1] = alawtolin16[s[0]][1]; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[0] = alawtolin16[s[0]][0]; d[1] = alawtolin16[s[0]][1]; d[2] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[2] = alawtolin16[s[0]][0] ^ 0x80; d[1] = alawtolin16[s[0]][1]; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 3, m) { d[0] = alawtolin16[s[0]][0] ^ 0x80; d[1] = alawtolin16[s[0]][1]; d[2] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(alaw_to_linear32) { stream_filter_t *this; int m, err; this = (stream_filter_t *)self; max_used = (max_used + 1) & ~1; /* round up to even */ if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 4))) return err; m = (dst->end - dst->start) & ~1; m = min(m, max_used); switch (dst->param.encoding) { case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[3] = alawtolin16[s[0]][0]; d[2] = alawtolin16[s[0]][1]; d[1] = 0; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[0] = alawtolin16[s[0]][0]; d[1] = alawtolin16[s[0]][1]; d[2] = 0; d[3] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[3] = alawtolin16[s[0]][0] ^ 0x80; d[2] = alawtolin16[s[0]][1]; d[1] = 0; d[0] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) { d[0] = alawtolin16[s[0]][0] ^ 0x80; d[1] = alawtolin16[s[0]][1]; d[2] = 0; d[3] = 0; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; } DEFINE_FILTER(linearN_to_alaw) { stream_filter_t *this; int hw, m, err; this = (stream_filter_t *)self; hw = this->src->param.precision / NBBY; if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used * hw))) return err; m = dst->end - dst->start; m = min(m, max_used); switch (this->src->param.encoding) { case AUDIO_ENCODING_SLINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintoalaw[s[hw - 1] ^ 0x80]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_SLINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintoalaw[s[0] ^ 0x80]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_LE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintoalaw[s[hw - 1]]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; case AUDIO_ENCODING_ULINEAR_BE: FILTER_LOOP_PROLOGUE(this->src, hw, dst, 1, m) { d[0] = lintoalaw[s[0]]; } FILTER_LOOP_EPILOGUE(this->src, dst); break; default: aprint_error( "%s: encoding must be [s/u]linear_[le/be]\n", __func__); break; } return 0; }