1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
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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.
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12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
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15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
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21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1993-2001 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate * All rights reserved.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate #include <AudioExtent.h>
28*7c478bd9Sstevel@tonic-gate #include <stdio.h>
29*7c478bd9Sstevel@tonic-gate
30*7c478bd9Sstevel@tonic-gate // class AudioExtent methods
31*7c478bd9Sstevel@tonic-gate
32*7c478bd9Sstevel@tonic-gate
33*7c478bd9Sstevel@tonic-gate // class AudioExtent Constructor
34*7c478bd9Sstevel@tonic-gate AudioExtent::
AudioExtent(Audio * obj,double s,double e)35*7c478bd9Sstevel@tonic-gate AudioExtent(
36*7c478bd9Sstevel@tonic-gate Audio* obj, // audio object to point to
37*7c478bd9Sstevel@tonic-gate double s, // start time
38*7c478bd9Sstevel@tonic-gate double e): // end time
39*7c478bd9Sstevel@tonic-gate Audio("[extent]"), ref(obj)
40*7c478bd9Sstevel@tonic-gate {
41*7c478bd9Sstevel@tonic-gate ref->Reference(); // reference audio object
42*7c478bd9Sstevel@tonic-gate SetStart(s); // set start/end times
43*7c478bd9Sstevel@tonic-gate SetEnd(e);
44*7c478bd9Sstevel@tonic-gate }
45*7c478bd9Sstevel@tonic-gate
46*7c478bd9Sstevel@tonic-gate // class AudioExtent Destructor
47*7c478bd9Sstevel@tonic-gate AudioExtent::
~AudioExtent()48*7c478bd9Sstevel@tonic-gate ~AudioExtent()
49*7c478bd9Sstevel@tonic-gate {
50*7c478bd9Sstevel@tonic-gate ref->Dereference(); // clear audio object reference
51*7c478bd9Sstevel@tonic-gate }
52*7c478bd9Sstevel@tonic-gate
53*7c478bd9Sstevel@tonic-gate // Get referenced object
54*7c478bd9Sstevel@tonic-gate Audio* AudioExtent::
GetRef() const55*7c478bd9Sstevel@tonic-gate GetRef() const
56*7c478bd9Sstevel@tonic-gate {
57*7c478bd9Sstevel@tonic-gate return (ref);
58*7c478bd9Sstevel@tonic-gate }
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate // Set referenced object
61*7c478bd9Sstevel@tonic-gate void AudioExtent::
SetRef(Audio * r)62*7c478bd9Sstevel@tonic-gate SetRef(
63*7c478bd9Sstevel@tonic-gate Audio* r) // new audio object
64*7c478bd9Sstevel@tonic-gate {
65*7c478bd9Sstevel@tonic-gate if (ref == r) // object is not changing
66*7c478bd9Sstevel@tonic-gate return;
67*7c478bd9Sstevel@tonic-gate ref->Dereference(); // dereference previous object
68*7c478bd9Sstevel@tonic-gate if (r != 0) {
69*7c478bd9Sstevel@tonic-gate ref = r;
70*7c478bd9Sstevel@tonic-gate ref->Reference(); // reference new object
71*7c478bd9Sstevel@tonic-gate } else {
72*7c478bd9Sstevel@tonic-gate PrintMsg(_MGET_("AudioExtent:...NULL Audio object reference"),
73*7c478bd9Sstevel@tonic-gate Fatal);
74*7c478bd9Sstevel@tonic-gate }
75*7c478bd9Sstevel@tonic-gate }
76*7c478bd9Sstevel@tonic-gate
77*7c478bd9Sstevel@tonic-gate // Get start time
78*7c478bd9Sstevel@tonic-gate Double AudioExtent::
GetStart() const79*7c478bd9Sstevel@tonic-gate GetStart() const
80*7c478bd9Sstevel@tonic-gate {
81*7c478bd9Sstevel@tonic-gate return (start);
82*7c478bd9Sstevel@tonic-gate }
83*7c478bd9Sstevel@tonic-gate
84*7c478bd9Sstevel@tonic-gate // Set start time
85*7c478bd9Sstevel@tonic-gate void AudioExtent::
SetStart(Double s)86*7c478bd9Sstevel@tonic-gate SetStart(
87*7c478bd9Sstevel@tonic-gate Double s) // start time, in seconds
88*7c478bd9Sstevel@tonic-gate {
89*7c478bd9Sstevel@tonic-gate if (Undefined(s) || (s < 0.))
90*7c478bd9Sstevel@tonic-gate start = 0.;
91*7c478bd9Sstevel@tonic-gate else
92*7c478bd9Sstevel@tonic-gate start = s;
93*7c478bd9Sstevel@tonic-gate }
94*7c478bd9Sstevel@tonic-gate
95*7c478bd9Sstevel@tonic-gate // Get end time
96*7c478bd9Sstevel@tonic-gate Double AudioExtent::
GetEnd() const97*7c478bd9Sstevel@tonic-gate GetEnd() const
98*7c478bd9Sstevel@tonic-gate {
99*7c478bd9Sstevel@tonic-gate // If determinate endpoint, return it
100*7c478bd9Sstevel@tonic-gate if (!Undefined(end))
101*7c478bd9Sstevel@tonic-gate return (end);
102*7c478bd9Sstevel@tonic-gate // Otherwise, return the endpoint of the underlying object
103*7c478bd9Sstevel@tonic-gate return (ref->GetLength());
104*7c478bd9Sstevel@tonic-gate }
105*7c478bd9Sstevel@tonic-gate
106*7c478bd9Sstevel@tonic-gate // Set end time
107*7c478bd9Sstevel@tonic-gate void AudioExtent::
SetEnd(Double e)108*7c478bd9Sstevel@tonic-gate SetEnd(
109*7c478bd9Sstevel@tonic-gate Double e) // end time, in seconds
110*7c478bd9Sstevel@tonic-gate {
111*7c478bd9Sstevel@tonic-gate Double len;
112*7c478bd9Sstevel@tonic-gate
113*7c478bd9Sstevel@tonic-gate // If known endpoint and object has known size, do not exceed size
114*7c478bd9Sstevel@tonic-gate if (!Undefined(e)) {
115*7c478bd9Sstevel@tonic-gate len = ref->GetLength();
116*7c478bd9Sstevel@tonic-gate if (!Undefined(len) && (e > len))
117*7c478bd9Sstevel@tonic-gate e = len;
118*7c478bd9Sstevel@tonic-gate }
119*7c478bd9Sstevel@tonic-gate end = e;
120*7c478bd9Sstevel@tonic-gate }
121*7c478bd9Sstevel@tonic-gate
122*7c478bd9Sstevel@tonic-gate // Get the length of an audio extent
123*7c478bd9Sstevel@tonic-gate Double AudioExtent::
GetLength() const124*7c478bd9Sstevel@tonic-gate GetLength() const
125*7c478bd9Sstevel@tonic-gate {
126*7c478bd9Sstevel@tonic-gate Double x;
127*7c478bd9Sstevel@tonic-gate
128*7c478bd9Sstevel@tonic-gate // If extent end is indeterminate, use the end of the target object
129*7c478bd9Sstevel@tonic-gate x = GetEnd();
130*7c478bd9Sstevel@tonic-gate // If the object length is indeterminate, then the length is
131*7c478bd9Sstevel@tonic-gate if (Undefined(x))
132*7c478bd9Sstevel@tonic-gate return (x);
133*7c478bd9Sstevel@tonic-gate return (x - start);
134*7c478bd9Sstevel@tonic-gate }
135*7c478bd9Sstevel@tonic-gate
136*7c478bd9Sstevel@tonic-gate // Construct a name for the list
137*7c478bd9Sstevel@tonic-gate char *AudioExtent::
GetName() const138*7c478bd9Sstevel@tonic-gate GetName() const
139*7c478bd9Sstevel@tonic-gate {
140*7c478bd9Sstevel@tonic-gate // XXX - construct a better name
141*7c478bd9Sstevel@tonic-gate return (ref->GetName());
142*7c478bd9Sstevel@tonic-gate }
143*7c478bd9Sstevel@tonic-gate
144*7c478bd9Sstevel@tonic-gate // Get the audio header for the current read position
145*7c478bd9Sstevel@tonic-gate AudioHdr AudioExtent::
GetHeader()146*7c478bd9Sstevel@tonic-gate GetHeader()
147*7c478bd9Sstevel@tonic-gate {
148*7c478bd9Sstevel@tonic-gate return (ref->GetDHeader(ReadPosition() + start));
149*7c478bd9Sstevel@tonic-gate }
150*7c478bd9Sstevel@tonic-gate
151*7c478bd9Sstevel@tonic-gate // Get the audio header for the given position
152*7c478bd9Sstevel@tonic-gate AudioHdr AudioExtent::
GetHeader(Double pos)153*7c478bd9Sstevel@tonic-gate GetHeader(
154*7c478bd9Sstevel@tonic-gate Double pos) // position
155*7c478bd9Sstevel@tonic-gate {
156*7c478bd9Sstevel@tonic-gate return (ref->GetDHeader(pos + start));
157*7c478bd9Sstevel@tonic-gate }
158*7c478bd9Sstevel@tonic-gate
159*7c478bd9Sstevel@tonic-gate // Copy data from extent into specified buffer.
160*7c478bd9Sstevel@tonic-gate // No data format translation takes place.
161*7c478bd9Sstevel@tonic-gate // The object's read position is not updated.
162*7c478bd9Sstevel@tonic-gate //
163*7c478bd9Sstevel@tonic-gate // Since the extent could refer to a list of extents of differing encodings,
164*7c478bd9Sstevel@tonic-gate // clients should always use GetHeader() in combination with ReadData()
165*7c478bd9Sstevel@tonic-gate AudioError AudioExtent::
ReadData(void * buf,size_t & len,Double & pos)166*7c478bd9Sstevel@tonic-gate ReadData(
167*7c478bd9Sstevel@tonic-gate void* buf, // destination buffer address
168*7c478bd9Sstevel@tonic-gate size_t& len, // buffer size (updated)
169*7c478bd9Sstevel@tonic-gate Double& pos) // start position (updated)
170*7c478bd9Sstevel@tonic-gate {
171*7c478bd9Sstevel@tonic-gate size_t cnt;
172*7c478bd9Sstevel@tonic-gate off_t buflen;
173*7c478bd9Sstevel@tonic-gate Double off;
174*7c478bd9Sstevel@tonic-gate Double newpos;
175*7c478bd9Sstevel@tonic-gate AudioError err;
176*7c478bd9Sstevel@tonic-gate
177*7c478bd9Sstevel@tonic-gate // Save buffer size and zero transfer count
178*7c478bd9Sstevel@tonic-gate cnt = len;
179*7c478bd9Sstevel@tonic-gate len = 0;
180*7c478bd9Sstevel@tonic-gate
181*7c478bd9Sstevel@tonic-gate // Position must be valid
182*7c478bd9Sstevel@tonic-gate if (Undefined(pos) || (pos < 0.) || ((int)cnt < 0))
183*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_BADARG));
184*7c478bd9Sstevel@tonic-gate
185*7c478bd9Sstevel@tonic-gate // If the end is determinate, check start position and length
186*7c478bd9Sstevel@tonic-gate off = pos + start;
187*7c478bd9Sstevel@tonic-gate newpos = GetEnd();
188*7c478bd9Sstevel@tonic-gate if (!Undefined(newpos)) {
189*7c478bd9Sstevel@tonic-gate // If starting beyond eof, give up now
190*7c478bd9Sstevel@tonic-gate if (off >= newpos) {
191*7c478bd9Sstevel@tonic-gate err = AUDIO_EOF;
192*7c478bd9Sstevel@tonic-gate err.sys = AUDIO_COPY_INPUT_EOF;
193*7c478bd9Sstevel@tonic-gate return (err);
194*7c478bd9Sstevel@tonic-gate }
195*7c478bd9Sstevel@tonic-gate
196*7c478bd9Sstevel@tonic-gate // If the read would extend beyond end-of-extent, shorten it
197*7c478bd9Sstevel@tonic-gate buflen = GetHeader(pos).Time_to_Bytes((Double)(newpos - off));
198*7c478bd9Sstevel@tonic-gate if (buflen == 0) {
199*7c478bd9Sstevel@tonic-gate err = AUDIO_EOF;
200*7c478bd9Sstevel@tonic-gate err.sys = AUDIO_COPY_INPUT_EOF;
201*7c478bd9Sstevel@tonic-gate return (err);
202*7c478bd9Sstevel@tonic-gate }
203*7c478bd9Sstevel@tonic-gate if (buflen < cnt)
204*7c478bd9Sstevel@tonic-gate cnt = (size_t)buflen;
205*7c478bd9Sstevel@tonic-gate }
206*7c478bd9Sstevel@tonic-gate // Zero-length reads are easy
207*7c478bd9Sstevel@tonic-gate if (cnt == 0) {
208*7c478bd9Sstevel@tonic-gate err = AUDIO_SUCCESS;
209*7c478bd9Sstevel@tonic-gate err.sys = AUDIO_COPY_ZERO_LIMIT;
210*7c478bd9Sstevel@tonic-gate return (err);
211*7c478bd9Sstevel@tonic-gate }
212*7c478bd9Sstevel@tonic-gate
213*7c478bd9Sstevel@tonic-gate // Save the offset, read data, and update the returned position
214*7c478bd9Sstevel@tonic-gate newpos = off;
215*7c478bd9Sstevel@tonic-gate len = cnt;
216*7c478bd9Sstevel@tonic-gate err = ref->ReadData(buf, len, newpos);
217*7c478bd9Sstevel@tonic-gate pos = (newpos - start); // XXX - calculate bytes and convert?
218*7c478bd9Sstevel@tonic-gate return (err);
219*7c478bd9Sstevel@tonic-gate }
220*7c478bd9Sstevel@tonic-gate
221*7c478bd9Sstevel@tonic-gate // Write to AudioExtent is (currently) prohibited
222*7c478bd9Sstevel@tonic-gate AudioError AudioExtent::
WriteData(void *,size_t & len,Double &)223*7c478bd9Sstevel@tonic-gate WriteData(
224*7c478bd9Sstevel@tonic-gate void*, // destination buffer address
225*7c478bd9Sstevel@tonic-gate size_t& len, // buffer size (updated)
226*7c478bd9Sstevel@tonic-gate Double&) // start position (updated)
227*7c478bd9Sstevel@tonic-gate {
228*7c478bd9Sstevel@tonic-gate len = 0;
229*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_NOEFFECT));
230*7c478bd9Sstevel@tonic-gate }
231