1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1990-2001 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate * All rights reserved.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate #include <AudioStream.h>
28*7c478bd9Sstevel@tonic-gate #include <string.h>
29*7c478bd9Sstevel@tonic-gate
30*7c478bd9Sstevel@tonic-gate // class AudioStream methods
31*7c478bd9Sstevel@tonic-gate
32*7c478bd9Sstevel@tonic-gate
33*7c478bd9Sstevel@tonic-gate // Constructor
34*7c478bd9Sstevel@tonic-gate AudioStream::
AudioStream(const char * path)35*7c478bd9Sstevel@tonic-gate AudioStream(
36*7c478bd9Sstevel@tonic-gate const char *path): // pathname
37*7c478bd9Sstevel@tonic-gate Audio(path), length(AUDIO_UNKNOWN_TIME)
38*7c478bd9Sstevel@tonic-gate {
39*7c478bd9Sstevel@tonic-gate }
40*7c478bd9Sstevel@tonic-gate
41*7c478bd9Sstevel@tonic-gate // Set the header structure, even if it is already set
42*7c478bd9Sstevel@tonic-gate AudioError AudioStream::
updateheader(const AudioHdr & h)43*7c478bd9Sstevel@tonic-gate updateheader(
44*7c478bd9Sstevel@tonic-gate const AudioHdr& h) // new header to set
45*7c478bd9Sstevel@tonic-gate {
46*7c478bd9Sstevel@tonic-gate AudioError err;
47*7c478bd9Sstevel@tonic-gate
48*7c478bd9Sstevel@tonic-gate // Validate the header before stuffing it in
49*7c478bd9Sstevel@tonic-gate err = h.Validate();
50*7c478bd9Sstevel@tonic-gate if (err != AUDIO_SUCCESS)
51*7c478bd9Sstevel@tonic-gate return (RaiseError(err));
52*7c478bd9Sstevel@tonic-gate
53*7c478bd9Sstevel@tonic-gate // Copy in the new header
54*7c478bd9Sstevel@tonic-gate hdr = h;
55*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
56*7c478bd9Sstevel@tonic-gate }
57*7c478bd9Sstevel@tonic-gate
58*7c478bd9Sstevel@tonic-gate // Set the header structure
59*7c478bd9Sstevel@tonic-gate AudioError AudioStream::
SetHeader(const AudioHdr & h)60*7c478bd9Sstevel@tonic-gate SetHeader(
61*7c478bd9Sstevel@tonic-gate const AudioHdr& h) // new header to set
62*7c478bd9Sstevel@tonic-gate {
63*7c478bd9Sstevel@tonic-gate // Once the header is set and the file is open, it cannot be changed
64*7c478bd9Sstevel@tonic-gate // XXX - hdrset test might be redundant?
65*7c478bd9Sstevel@tonic-gate if (hdrset() && opened())
66*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_NOEFFECT));
67*7c478bd9Sstevel@tonic-gate
68*7c478bd9Sstevel@tonic-gate return (updateheader(h));
69*7c478bd9Sstevel@tonic-gate }
70*7c478bd9Sstevel@tonic-gate
71*7c478bd9Sstevel@tonic-gate // Check the endian nature of the data, and change if necessary.
72*7c478bd9Sstevel@tonic-gate AudioError AudioStream::
coerceEndian(unsigned char * buf,size_t len,AudioEndian endian)73*7c478bd9Sstevel@tonic-gate coerceEndian(unsigned char *buf, size_t len,
74*7c478bd9Sstevel@tonic-gate AudioEndian endian)
75*7c478bd9Sstevel@tonic-gate {
76*7c478bd9Sstevel@tonic-gate // If the stream isn't endian sensitive, don't bother.
77*7c478bd9Sstevel@tonic-gate if (! isEndianSensitive())
78*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
79*7c478bd9Sstevel@tonic-gate
80*7c478bd9Sstevel@tonic-gate if (hdr.endian == endian) {
81*7c478bd9Sstevel@tonic-gate #ifdef DEBUG
82*7c478bd9Sstevel@tonic-gate AUDIO_DEBUG((1, "AudioStream: endian swap not needed, byte"
83*7c478bd9Sstevel@tonic-gate "order OK.\n"));
84*7c478bd9Sstevel@tonic-gate #endif
85*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
86*7c478bd9Sstevel@tonic-gate }
87*7c478bd9Sstevel@tonic-gate
88*7c478bd9Sstevel@tonic-gate // The endians don't match, lets swap bytes.
89*7c478bd9Sstevel@tonic-gate unsigned char chTemp;
90*7c478bd9Sstevel@tonic-gate for (int i = 0; i < len - 1; i += 2) {
91*7c478bd9Sstevel@tonic-gate chTemp = buf[i];
92*7c478bd9Sstevel@tonic-gate buf[i] = buf[i + 1];
93*7c478bd9Sstevel@tonic-gate buf[i+1] = chTemp;
94*7c478bd9Sstevel@tonic-gate }
95*7c478bd9Sstevel@tonic-gate
96*7c478bd9Sstevel@tonic-gate #ifdef DEBUG
97*7c478bd9Sstevel@tonic-gate AUDIO_DEBUG((1, "AudioStream: converting endian.\n"));
98*7c478bd9Sstevel@tonic-gate // printf("AudioStream: converting endian.\n");
99*7c478bd9Sstevel@tonic-gate #endif
100*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
101*7c478bd9Sstevel@tonic-gate }
102*7c478bd9Sstevel@tonic-gate
103*7c478bd9Sstevel@tonic-gate // This routine knows if the current format is endian sensitive.
isEndianSensitive() const104*7c478bd9Sstevel@tonic-gate Boolean AudioStream::isEndianSensitive() const
105*7c478bd9Sstevel@tonic-gate {
106*7c478bd9Sstevel@tonic-gate
107*7c478bd9Sstevel@tonic-gate // Only these encodings have endian problems.
108*7c478bd9Sstevel@tonic-gate if (hdr.encoding == LINEAR || hdr.encoding == FLOAT)
109*7c478bd9Sstevel@tonic-gate return (TRUE);
110*7c478bd9Sstevel@tonic-gate
111*7c478bd9Sstevel@tonic-gate return (FALSE);
112*7c478bd9Sstevel@tonic-gate }
113