1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1991-2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <sys/stat.h>
30
31 #include <AudioRawPipe.h>
32 #include <libaudio.h>
33 #include <audio_hdr.h>
34
35 // class AudioPipe methods
36
37 // Constructor with file descriptor, mode, and optional name
38 AudioRawPipe::
AudioRawPipe(const int desc,const FileAccess acc,const AudioHdr & hdr_local,const char * name_local,const off_t off)39 AudioRawPipe(
40 const int desc, // file descriptor
41 const FileAccess acc, // access mode
42 const AudioHdr& hdr_local, // header
43 const char *name_local, // name
44 const off_t off // offset
45 ):AudioPipe(desc, acc, name_local), offset(off)
46 {
47 isopened = FALSE;
48 setfd(desc);
49 SetHeader(hdr_local);
50 }
51
52 // The create routine for pipes writes a file header
53 AudioError AudioRawPipe::
Create()54 Create()
55 {
56 AudioError err;
57
58 // Was the header properly set?
59 err = GetHeader().Validate();
60 if (err != AUDIO_SUCCESS)
61 return (RaiseError(err));
62
63 // Open fd supplied by constructor
64 if (!isfdset() || opened()) {
65 return (RaiseError(AUDIO_ERR_NOEFFECT, Warning));
66 }
67
68 // set flag for opened() test
69 isopened = TRUE;
70
71 // Set the actual output length to zero
72 setlength(0.);
73
74 return (AUDIO_SUCCESS);
75 }
76
77 // The open routine for raw pipes validates the header and
78 // init's the read pos to offset and sets the opened flag.
79 AudioError AudioRawPipe::
Open()80 Open()
81 {
82 AudioError err;
83 struct stat st;
84
85 // The constructor should have supplied a valid fd
86 // If fd is not open, or file header already decoded, skip it
87 if (!isfdset() || opened())
88 return (RaiseError(AUDIO_ERR_NOEFFECT, Warning));
89
90 // Stat the file, to see if it is a regular file
91 if (fstat(getfd(), &st) < 0)
92 return (RaiseError(AUDIO_UNIXERROR));
93
94 // check validity of file header
95 err = GetHeader().Validate();
96 if (err != AUDIO_SUCCESS) {
97 (void) close(getfd());
98 setfd(-1);
99 return (err);
100 }
101
102 // Only trust the file size for regular files
103 if (S_ISREG(st.st_mode)) {
104 // for raw files - no hdr, so it's the whole file minus
105 // the offset.
106 setlength(GetHeader().Bytes_to_Time(st.st_size - offset));
107 } else {
108 // don't know ...
109 setlength(AUDIO_UNKNOWN_TIME);
110 }
111
112 // set flag for opened() test
113 isopened = TRUE;
114
115 err = SetOffset(offset);
116
117 // reset logical position to 0.0, since this is, in effect,
118 // the beginning of the file.
119 SetReadPosition(0.0, Absolute);
120
121 return (err);
122 }
123
124 Boolean AudioRawPipe::
opened() const125 opened() const
126 {
127 return (isopened);
128 }
129
130 AudioError AudioRawPipe::
SetOffset(off_t val)131 SetOffset(off_t val)
132 {
133 off_t setting = 0;
134 AudioError err;
135
136 // only read only files for now
137 if (GetAccess().Writeable()) {
138 return (AUDIO_ERR_NOEFFECT);
139 }
140
141 // only allow this if we haven't read anything yet (i.e. current
142 // position is 0).
143 if (ReadPosition() != 0.) {
144 return (AUDIO_ERR_NOEFFECT);
145 }
146
147 if ((err = seekread(GetHeader().Bytes_to_Time(val), setting))
148 != AUDIO_SUCCESS) {
149 return (err);
150 }
151
152 // this should *never* happen 'cause seekread just sets setting
153 // to GetHeader().Time_to_Bytes....
154 if (setting != val) {
155 // don't really know what error is apropos for this.
156 return (AUDIO_ERR_BADFRAME);
157 }
158
159 offset = val;
160 return (AUDIO_SUCCESS);
161 }
162
163 off_t AudioRawPipe::
GetOffset() const164 GetOffset() const
165 {
166 return (offset);
167 }
168