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::
AudioStream(const char * path)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::
updateheader(const AudioHdr & h)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::
SetHeader(const AudioHdr & h)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::
coerceEndian(unsigned char * buf,size_t len,AudioEndian endian)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.
isEndianSensitive() const106*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