Annotation of sys/dev/auconv.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: auconv.c,v 1.7 2007/07/17 08:35:33 jakemsr Exp $ */
! 2: /* $NetBSD: auconv.c,v 1.3 1999/11/01 18:12:19 augustss Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by the Computer Systems
! 19: * Engineering Group at Lawrence Berkeley Laboratory.
! 20: * 4. Neither the name of the University nor of the Laboratory may be used
! 21: * to endorse or promote products derived from this software without
! 22: * specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: */
! 37:
! 38: #include <sys/types.h>
! 39: #include <sys/audioio.h>
! 40: #include <dev/auconv.h>
! 41:
! 42: void
! 43: change_sign8(void *v, u_char *p, int cc)
! 44: {
! 45: while (--cc >= 0) {
! 46: *p ^= 0x80;
! 47: ++p;
! 48: }
! 49: }
! 50:
! 51: void
! 52: change_sign16_le(void *v, u_char *p, int cc)
! 53: {
! 54: while ((cc -= 2) >= 0) {
! 55: p[1] ^= 0x80;
! 56: p += 2;
! 57: }
! 58: }
! 59:
! 60: void
! 61: change_sign16_be(void *v, u_char *p, int cc)
! 62: {
! 63: while ((cc -= 2) >= 0) {
! 64: p[0] ^= 0x80;
! 65: p += 2;
! 66: }
! 67: }
! 68:
! 69: void
! 70: swap_bytes(void *v, u_char *p, int cc)
! 71: {
! 72: u_char t;
! 73:
! 74: while ((cc -= 2) >= 0) {
! 75: t = p[0];
! 76: p[0] = p[1];
! 77: p[1] = t;
! 78: p += 2;
! 79: }
! 80: }
! 81:
! 82: void
! 83: swap_bytes_change_sign16_le(void *v, u_char *p, int cc)
! 84: {
! 85: u_char t;
! 86:
! 87: while ((cc -= 2) >= 0) {
! 88: t = p[1];
! 89: p[1] = p[0] ^ 0x80;
! 90: p[0] = t;
! 91: p += 2;
! 92: }
! 93: }
! 94:
! 95: void
! 96: swap_bytes_change_sign16_be(void *v, u_char *p, int cc)
! 97: {
! 98: u_char t;
! 99:
! 100: while ((cc -= 2) >= 0) {
! 101: t = p[0];
! 102: p[0] = p[1] ^ 0x80;
! 103: p[1] = t;
! 104: p += 2;
! 105: }
! 106: }
! 107:
! 108: void
! 109: change_sign16_swap_bytes_le(void *v, u_char *p, int cc)
! 110: {
! 111: swap_bytes_change_sign16_be(v, p, cc);
! 112: }
! 113:
! 114: void
! 115: change_sign16_swap_bytes_be(void *v, u_char *p, int cc)
! 116: {
! 117: swap_bytes_change_sign16_le(v, p, cc);
! 118: }
! 119:
! 120: void
! 121: linear8_to_linear16_le(void *v, u_char *p, int cc)
! 122: {
! 123: u_char *q = p;
! 124:
! 125: p += cc;
! 126: q += cc * 2;
! 127: while (--cc >= 0) {
! 128: q -= 2;
! 129: q[1] = *--p;
! 130: q[0] = 0;
! 131: }
! 132: }
! 133:
! 134: void
! 135: linear8_to_linear16_be(void *v, u_char *p, int cc)
! 136: {
! 137: u_char *q = p;
! 138:
! 139: p += cc;
! 140: q += cc * 2;
! 141: while (--cc >= 0) {
! 142: q -= 2;
! 143: q[0] = *--p;
! 144: q[1] = 0;
! 145: }
! 146: }
! 147:
! 148: void
! 149: linear16_to_linear8_le(void *v, u_char *p, int cc)
! 150: {
! 151: u_char *q = p;
! 152:
! 153: while ((cc -= 2) >= 0) {
! 154: *q++ = p[1];
! 155: p += 2;
! 156: }
! 157: }
! 158:
! 159: void
! 160: linear16_to_linear8_be(void *v, u_char *p, int cc)
! 161: {
! 162: u_char *q = p;
! 163:
! 164: while ((cc -= 2) >= 0) {
! 165: *q++ = p[0];
! 166: p += 2;
! 167: }
! 168: }
! 169:
! 170: void
! 171: ulinear8_to_linear16_le(void *v, u_char *p, int cc)
! 172: {
! 173: u_char *q = p;
! 174:
! 175: p += cc;
! 176: q += cc * 2;
! 177: while (--cc >= 0) {
! 178: q -= 2;
! 179: q[1] = (*--p) ^ 0x80;
! 180: q[0] = 0;
! 181: }
! 182: }
! 183:
! 184: void
! 185: ulinear8_to_linear16_be(void *v, u_char *p, int cc)
! 186: {
! 187: u_char *q = p;
! 188:
! 189: p += cc;
! 190: q += cc * 2;
! 191: while (--cc >= 0) {
! 192: q -= 2;
! 193: q[0] = (*--p) ^ 0x80;
! 194: q[1] = 0;
! 195: }
! 196: }
! 197:
! 198: void
! 199: linear16_to_ulinear8_le(void *v, u_char *p, int cc)
! 200: {
! 201: u_char *q = p;
! 202:
! 203: while ((cc -= 2) >= 0) {
! 204: *q++ = p[1] ^ 0x80;
! 205: p += 2;
! 206: }
! 207: }
! 208:
! 209: void
! 210: linear16_to_ulinear8_be(void *v, u_char *p, int cc)
! 211: {
! 212: u_char *q = p;
! 213:
! 214: while ((cc -= 2) >= 0) {
! 215: *q++ = p[0] ^ 0x80;
! 216: p += 2;
! 217: }
! 218: }
! 219:
! 220: /*
! 221: * just expand mono to stereo, no other conversions
! 222: */
! 223: void
! 224: noswap_bytes_mts(void *v, u_char *p, int cc)
! 225: {
! 226: u_char *q = p;
! 227:
! 228: p += cc;
! 229: q += cc * 2;
! 230: while ((cc -= 2) >= 0) {
! 231: q -= 4;
! 232: q[1] = q[3] = *--p;
! 233: q[0] = q[2] = *--p;
! 234: }
! 235: }
! 236:
! 237: /*
! 238: * same as swap_bytes(), just expand mono to stereo
! 239: */
! 240: void
! 241: swap_bytes_mts(void *v, u_char *p, int cc)
! 242: {
! 243: u_char *q = p;
! 244:
! 245: p += cc;
! 246: q += cc * 2;
! 247: while ((cc -= 2) >= 0) {
! 248: q -= 4;
! 249: q[0] = q[2] = *--p;
! 250: q[1] = q[3] = *--p;
! 251: }
! 252: }
! 253:
! 254: /*
! 255: * same as linear8_to_linear16_le(), plus expand mono to stereo
! 256: */
! 257: void
! 258: linear8_to_linear16_le_mts(void *v, u_char *p, int cc)
! 259: {
! 260: u_char *q = p;
! 261:
! 262: p += cc;
! 263: q += cc * 4;
! 264: while (--cc >= 0) {
! 265: q -= 4;
! 266: q[1] = q[3] = *--p;
! 267: q[0] = q[2] = 0;
! 268: }
! 269: }
! 270:
! 271: /*
! 272: * same as linear8_to_linear16_be(), plus expand mono to stereo
! 273: */
! 274: void
! 275: linear8_to_linear16_be_mts(void *v, u_char *p, int cc)
! 276: {
! 277: u_char *q = p;
! 278:
! 279: p += cc;
! 280: q += cc * 4;
! 281: while (--cc >= 0) {
! 282: q -= 4;
! 283: q[0] = q[2] = *--p;
! 284: q[1] = q[3] = 0;
! 285: }
! 286: }
! 287:
! 288: /*
! 289: * same as ulinear8_to_linear16_le(), plus expand mono to stereo
! 290: */
! 291: void
! 292: ulinear8_to_linear16_le_mts(void *v, u_char *p, int cc)
! 293: {
! 294: u_char *q = p;
! 295:
! 296: p += cc;
! 297: q += cc * 4;
! 298: while (--cc >= 0) {
! 299: q -= 4;
! 300: q[1] = q[3] = (*--p) ^ 0x80;
! 301: q[0] = q[2] = 0;
! 302: }
! 303: }
! 304:
! 305: /*
! 306: * same as ulinear8_to_linear16_be(), plus expand mono to stereo
! 307: */
! 308: void
! 309: ulinear8_to_linear16_be_mts(void *v, u_char *p, int cc)
! 310: {
! 311: u_char *q = p;
! 312:
! 313: p += cc;
! 314: q += cc * 4;
! 315: while (--cc >= 0) {
! 316: q -= 4;
! 317: q[0] = q[2] = (*--p) ^ 0x80;
! 318: q[1] = q[3] = 0;
! 319: }
! 320: }
! 321:
! 322: /*
! 323: * same as change_sign16_le(), plus expand mono to stereo
! 324: */
! 325: void
! 326: change_sign16_le_mts(void *v, u_char *p, int cc)
! 327: {
! 328: u_char *q = p;
! 329:
! 330: p += cc;
! 331: q += cc * 2;
! 332: while ((cc -= 2) >= 0) {
! 333: q -= 4;
! 334: q[1] = q[3] = (*--p) ^ 0x80;
! 335: q[0] = q[2] = *--p;
! 336: }
! 337: }
! 338:
! 339: /*
! 340: * same as change_sign16_be(), plus expand mono to stereo
! 341: */
! 342: void
! 343: change_sign16_be_mts(void *v, u_char *p, int cc)
! 344: {
! 345: u_char *q = p;
! 346:
! 347: p += cc;
! 348: q += cc * 2;
! 349: while ((cc -= 2) >= 0) {
! 350: q -= 4;
! 351: q[0] = q[2] = (*--p) ^ 0x80;
! 352: q[1] = q[3] = *--p;
! 353: }
! 354: }
! 355:
! 356: /*
! 357: * same as change_sign16_swap_bytes_le(), plus expand mono to stereo
! 358: */
! 359: void
! 360: change_sign16_swap_bytes_le_mts(void *v, u_char *p, int cc)
! 361: {
! 362: change_sign16_be_mts(v, p, cc);
! 363: }
! 364:
! 365: /*
! 366: * same as change_sign16_swap_bytes_be(), plus expand mono to stereo
! 367: */
! 368: void
! 369: change_sign16_swap_bytes_be_mts(void *v, u_char *p, int cc)
! 370: {
! 371: change_sign16_le_mts(v, p, cc);
! 372: }
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