1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 1990-2001 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <AudioStream.h> 30*0Sstevel@tonic-gate #include <string.h> 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate // class AudioStream methods 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate // Constructor 36*0Sstevel@tonic-gate AudioStream:: 37*0Sstevel@tonic-gate AudioStream( 38*0Sstevel@tonic-gate const char *path): // pathname 39*0Sstevel@tonic-gate Audio(path), length(AUDIO_UNKNOWN_TIME) 40*0Sstevel@tonic-gate { 41*0Sstevel@tonic-gate } 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate // Set the header structure, even if it is already set 44*0Sstevel@tonic-gate AudioError AudioStream:: 45*0Sstevel@tonic-gate updateheader( 46*0Sstevel@tonic-gate const AudioHdr& h) // new header to set 47*0Sstevel@tonic-gate { 48*0Sstevel@tonic-gate AudioError err; 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate // Validate the header before stuffing it in 51*0Sstevel@tonic-gate err = h.Validate(); 52*0Sstevel@tonic-gate if (err != AUDIO_SUCCESS) 53*0Sstevel@tonic-gate return (RaiseError(err)); 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate // Copy in the new header 56*0Sstevel@tonic-gate hdr = h; 57*0Sstevel@tonic-gate return (AUDIO_SUCCESS); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate // Set the header structure 61*0Sstevel@tonic-gate AudioError AudioStream:: 62*0Sstevel@tonic-gate SetHeader( 63*0Sstevel@tonic-gate const AudioHdr& h) // new header to set 64*0Sstevel@tonic-gate { 65*0Sstevel@tonic-gate // Once the header is set and the file is open, it cannot be changed 66*0Sstevel@tonic-gate // XXX - hdrset test might be redundant? 67*0Sstevel@tonic-gate if (hdrset() && opened()) 68*0Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_NOEFFECT)); 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate return (updateheader(h)); 71*0Sstevel@tonic-gate } 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate // Check the endian nature of the data, and change if necessary. 74*0Sstevel@tonic-gate AudioError AudioStream:: 75*0Sstevel@tonic-gate coerceEndian(unsigned char *buf, size_t len, 76*0Sstevel@tonic-gate AudioEndian endian) 77*0Sstevel@tonic-gate { 78*0Sstevel@tonic-gate // If the stream isn't endian sensitive, don't bother. 79*0Sstevel@tonic-gate if (! isEndianSensitive()) 80*0Sstevel@tonic-gate return (AUDIO_SUCCESS); 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate if (hdr.endian == endian) { 83*0Sstevel@tonic-gate #ifdef DEBUG 84*0Sstevel@tonic-gate AUDIO_DEBUG((1, "AudioStream: endian swap not needed, byte" 85*0Sstevel@tonic-gate "order OK.\n")); 86*0Sstevel@tonic-gate #endif 87*0Sstevel@tonic-gate return (AUDIO_SUCCESS); 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate // The endians don't match, lets swap bytes. 91*0Sstevel@tonic-gate unsigned char chTemp; 92*0Sstevel@tonic-gate for (int i = 0; i < len - 1; i += 2) { 93*0Sstevel@tonic-gate chTemp = buf[i]; 94*0Sstevel@tonic-gate buf[i] = buf[i + 1]; 95*0Sstevel@tonic-gate buf[i+1] = chTemp; 96*0Sstevel@tonic-gate } 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate #ifdef DEBUG 99*0Sstevel@tonic-gate AUDIO_DEBUG((1, "AudioStream: converting endian.\n")); 100*0Sstevel@tonic-gate // printf("AudioStream: converting endian.\n"); 101*0Sstevel@tonic-gate #endif 102*0Sstevel@tonic-gate return (AUDIO_SUCCESS); 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate // This routine knows if the current format is endian sensitive. 106*0Sstevel@tonic-gate Boolean AudioStream::isEndianSensitive() const 107*0Sstevel@tonic-gate { 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate // Only these encodings have endian problems. 110*0Sstevel@tonic-gate if (hdr.encoding == LINEAR || hdr.encoding == FLOAT) 111*0Sstevel@tonic-gate return (TRUE); 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate return (FALSE); 114*0Sstevel@tonic-gate } 115