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NetBSD/sys/dev/mulaw.c
jmcneill 8a962f23f2 Merge jmcneill-audiomp3 branch, which is derived from ad-audiomp2. From 
the original ad-audiomp branch notes:

  Add MP locking to the audio drivers.

  Making the audio drivers MP safe is necessary before efforts
  can be made to make the VM system MP safe.

  The are two locks per device instance, an ISR lock and
  a character device lock. The ISR lock replaces calls to
  splaudio()/splx(), and will be held across calls to device
  methods which were called at splaudio() before (e.g.
  trigger_output). The character device lock is held across
  calls to nearly all of the methods, excluding some only
  used for initialization, e.g. get_locks.

Welcome to 5.99.57.
2011-11-23 23:07:28 +00:00

513 lines
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/* $NetBSD: mulaw.c,v 1.28 2011/11/23 23:07:31 jmcneill 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.28 2011/11/23 23:07:31 jmcneill Exp $");
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <dev/auconv.h>
#include <dev/mulaw.h>
/* #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; /* 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[0] = mulawtolin16[s[0]][1];
d[1] = mulawtolin16[s[0]][0];
} 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[0] = mulawtolin16[s[0]][1];
d[1] = mulawtolin16[s[0]][0] ^ 0x80;
} 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;
}
return 0;
}
DEFINE_FILTER(linear16_to_mulaw)
{
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 * 2)))
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, 2, dst, 1, m) {
d[0] = lintomulaw[s[1] ^ 0x80];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
case AUDIO_ENCODING_SLINEAR_BE:
FILTER_LOOP_PROLOGUE(this->src, 2, 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, 2, dst, 1, m) {
d[0] = lintomulaw[s[1]];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
case AUDIO_ENCODING_ULINEAR_BE:
FILTER_LOOP_PROLOGUE(this->src, 2, dst, 1, m) {
d[0] = lintomulaw[s[0]];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
}
return 0;
}
DEFINE_FILTER(linear8_to_mulaw)
{
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 (this->src->param.encoding == AUDIO_ENCODING_ULINEAR_LE) {
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintomulaw[*s];
} FILTER_LOOP_EPILOGUE(this->src, dst);
} else { /* SLINEAR_LE */
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintomulaw[*s ^ 0x80];
} FILTER_LOOP_EPILOGUE(this->src, dst);
}
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[0] = alawtolin16[s[0]][1];
d[1] = alawtolin16[s[0]][0];
} 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[0] = alawtolin16[s[0]][1];
d[1] = alawtolin16[s[0]][0] ^ 0x80;
} 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;
}
return 0;
}
DEFINE_FILTER(linear8_to_alaw)
{
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 (this->src->param.encoding == AUDIO_ENCODING_ULINEAR_LE) {
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintoalaw[*s];
} FILTER_LOOP_EPILOGUE(this->src, dst);
} else { /* SLINEAR_LE */
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintoalaw[*s ^ 0x80];
} FILTER_LOOP_EPILOGUE(this->src, dst);
}
return 0;
}
DEFINE_FILTER(linear16_to_alaw)
{
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 * 2)))
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, 2, dst, 1, m) {
d[0] = lintoalaw[s[1] ^ 0x80];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
case AUDIO_ENCODING_SLINEAR_BE:
FILTER_LOOP_PROLOGUE(this->src, 2, 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, 2, dst, 1, m) {
d[0] = lintoalaw[s[1]];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
case AUDIO_ENCODING_ULINEAR_BE:
FILTER_LOOP_PROLOGUE(this->src, 2, dst, 1, m) {
d[0] = lintoalaw[s[0]];
} FILTER_LOOP_EPILOGUE(this->src, dst);
break;
}
return 0;
}
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