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) 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 <AudioList.h>
29*7c478bd9Sstevel@tonic-gate #include <AudioDebug.h>
30*7c478bd9Sstevel@tonic-gate
31*7c478bd9Sstevel@tonic-gate // class AudioList methods
32*7c478bd9Sstevel@tonic-gate
33*7c478bd9Sstevel@tonic-gate
34*7c478bd9Sstevel@tonic-gate // class AudioListEntry Constructor
35*7c478bd9Sstevel@tonic-gate AudioList::AudioListEntry::
AudioListEntry(Audio * obj)36*7c478bd9Sstevel@tonic-gate AudioListEntry(
37*7c478bd9Sstevel@tonic-gate Audio* obj): // audio object to point to
38*7c478bd9Sstevel@tonic-gate aptr(0), next(0), prev(0)
39*7c478bd9Sstevel@tonic-gate {
40*7c478bd9Sstevel@tonic-gate // A NULL object is only valid in dummy entries, such as list heads
41*7c478bd9Sstevel@tonic-gate newptr(obj);
42*7c478bd9Sstevel@tonic-gate }
43*7c478bd9Sstevel@tonic-gate
44*7c478bd9Sstevel@tonic-gate // class AudioListEntry Destructor
45*7c478bd9Sstevel@tonic-gate AudioList::AudioListEntry::
~AudioListEntry()46*7c478bd9Sstevel@tonic-gate ~AudioListEntry()
47*7c478bd9Sstevel@tonic-gate {
48*7c478bd9Sstevel@tonic-gate newptr(0);
49*7c478bd9Sstevel@tonic-gate if (next != 0) {
50*7c478bd9Sstevel@tonic-gate next->prev = prev;
51*7c478bd9Sstevel@tonic-gate }
52*7c478bd9Sstevel@tonic-gate if (prev != 0) {
53*7c478bd9Sstevel@tonic-gate prev->next = next;
54*7c478bd9Sstevel@tonic-gate }
55*7c478bd9Sstevel@tonic-gate }
56*7c478bd9Sstevel@tonic-gate
57*7c478bd9Sstevel@tonic-gate // Set a new extent pointer in an AudioListEntry
58*7c478bd9Sstevel@tonic-gate void AudioList::AudioListEntry::
newptr(Audio * newa)59*7c478bd9Sstevel@tonic-gate newptr(
60*7c478bd9Sstevel@tonic-gate Audio* newa) // new object
61*7c478bd9Sstevel@tonic-gate {
62*7c478bd9Sstevel@tonic-gate if (aptr != 0)
63*7c478bd9Sstevel@tonic-gate aptr->Dereference();
64*7c478bd9Sstevel@tonic-gate aptr = newa;
65*7c478bd9Sstevel@tonic-gate if (aptr != 0)
66*7c478bd9Sstevel@tonic-gate aptr->Reference();
67*7c478bd9Sstevel@tonic-gate }
68*7c478bd9Sstevel@tonic-gate
69*7c478bd9Sstevel@tonic-gate // Link object into list
70*7c478bd9Sstevel@tonic-gate // Link in a new AudioListEntry
71*7c478bd9Sstevel@tonic-gate void AudioList::AudioListEntry::
link(AudioListEntry * after)72*7c478bd9Sstevel@tonic-gate link(
73*7c478bd9Sstevel@tonic-gate AudioListEntry* after) // link after this one
74*7c478bd9Sstevel@tonic-gate {
75*7c478bd9Sstevel@tonic-gate // Link object into list
76*7c478bd9Sstevel@tonic-gate prev = after;
77*7c478bd9Sstevel@tonic-gate next = after->next;
78*7c478bd9Sstevel@tonic-gate after->next = this;
79*7c478bd9Sstevel@tonic-gate if (next != 0)
80*7c478bd9Sstevel@tonic-gate next->prev = this;
81*7c478bd9Sstevel@tonic-gate }
82*7c478bd9Sstevel@tonic-gate
83*7c478bd9Sstevel@tonic-gate // Split an AudioListEntry at the specified offset
84*7c478bd9Sstevel@tonic-gate void AudioList::AudioListEntry::
split(Double pos)85*7c478bd9Sstevel@tonic-gate split(
86*7c478bd9Sstevel@tonic-gate Double pos) // split offset
87*7c478bd9Sstevel@tonic-gate {
88*7c478bd9Sstevel@tonic-gate AudioExtent* e1;
89*7c478bd9Sstevel@tonic-gate AudioExtent* e2;
90*7c478bd9Sstevel@tonic-gate AudioListEntry* newp;
91*7c478bd9Sstevel@tonic-gate
92*7c478bd9Sstevel@tonic-gate // Create two extents referencing this object
93*7c478bd9Sstevel@tonic-gate e1 = new AudioExtent(aptr, 0., pos);
94*7c478bd9Sstevel@tonic-gate e2 = new AudioExtent(aptr, pos, AUDIO_UNKNOWN_TIME);
95*7c478bd9Sstevel@tonic-gate
96*7c478bd9Sstevel@tonic-gate // Set the current entry to the first extent and append the second
97*7c478bd9Sstevel@tonic-gate newptr(e1);
98*7c478bd9Sstevel@tonic-gate newp = new AudioListEntry(e2);
99*7c478bd9Sstevel@tonic-gate newp->link(this);
100*7c478bd9Sstevel@tonic-gate }
101*7c478bd9Sstevel@tonic-gate
102*7c478bd9Sstevel@tonic-gate
103*7c478bd9Sstevel@tonic-gate // class AudioList Constructor
104*7c478bd9Sstevel@tonic-gate AudioList::
AudioList(const char * local_name)105*7c478bd9Sstevel@tonic-gate AudioList(
106*7c478bd9Sstevel@tonic-gate const char *local_name): // name string
107*7c478bd9Sstevel@tonic-gate Audio(local_name), head(0)
108*7c478bd9Sstevel@tonic-gate {
109*7c478bd9Sstevel@tonic-gate }
110*7c478bd9Sstevel@tonic-gate
111*7c478bd9Sstevel@tonic-gate // class AudioList Destructor
112*7c478bd9Sstevel@tonic-gate AudioList::
~AudioList()113*7c478bd9Sstevel@tonic-gate ~AudioList()
114*7c478bd9Sstevel@tonic-gate {
115*7c478bd9Sstevel@tonic-gate // Delete all entries in the list
116*7c478bd9Sstevel@tonic-gate while (first() != 0)
117*7c478bd9Sstevel@tonic-gate delete first();
118*7c478bd9Sstevel@tonic-gate }
119*7c478bd9Sstevel@tonic-gate
120*7c478bd9Sstevel@tonic-gate // Get the first entry in the list
121*7c478bd9Sstevel@tonic-gate AudioList::AudioListEntry* AudioList::
first() const122*7c478bd9Sstevel@tonic-gate first() const
123*7c478bd9Sstevel@tonic-gate {
124*7c478bd9Sstevel@tonic-gate return (head.next);
125*7c478bd9Sstevel@tonic-gate }
126*7c478bd9Sstevel@tonic-gate
127*7c478bd9Sstevel@tonic-gate // Get the extent and offset corresponding to a given position
128*7c478bd9Sstevel@tonic-gate // Return FALSE if no extents in list or position is beyond eof
129*7c478bd9Sstevel@tonic-gate Boolean AudioList::
getposition(Double & pos,AudioListEntry * & ep) const130*7c478bd9Sstevel@tonic-gate getposition(
131*7c478bd9Sstevel@tonic-gate Double& pos, // target position (updated)
132*7c478bd9Sstevel@tonic-gate AudioListEntry*& ep) const // returned extent pointer
133*7c478bd9Sstevel@tonic-gate {
134*7c478bd9Sstevel@tonic-gate Double length;
135*7c478bd9Sstevel@tonic-gate
136*7c478bd9Sstevel@tonic-gate // Position must be specified
137*7c478bd9Sstevel@tonic-gate if (Undefined(pos))
138*7c478bd9Sstevel@tonic-gate return (FALSE);
139*7c478bd9Sstevel@tonic-gate
140*7c478bd9Sstevel@tonic-gate // Get the first extent in the list
141*7c478bd9Sstevel@tonic-gate ep = first();
142*7c478bd9Sstevel@tonic-gate while (ep != 0) {
143*7c478bd9Sstevel@tonic-gate // Get length of extent
144*7c478bd9Sstevel@tonic-gate length = ep->aptr->GetLength();
145*7c478bd9Sstevel@tonic-gate if (Undefined(length)) {
146*7c478bd9Sstevel@tonic-gate // Can't determine sizes beyond this
147*7c478bd9Sstevel@tonic-gate return (TRUE);
148*7c478bd9Sstevel@tonic-gate }
149*7c478bd9Sstevel@tonic-gate // If the remaining offset is inside the current extent
150*7c478bd9Sstevel@tonic-gate if (length > pos)
151*7c478bd9Sstevel@tonic-gate return (TRUE);
152*7c478bd9Sstevel@tonic-gate
153*7c478bd9Sstevel@tonic-gate // Move on to the next extent
154*7c478bd9Sstevel@tonic-gate pos -= length;
155*7c478bd9Sstevel@tonic-gate ep = ep->next;
156*7c478bd9Sstevel@tonic-gate }
157*7c478bd9Sstevel@tonic-gate return (FALSE);
158*7c478bd9Sstevel@tonic-gate }
159*7c478bd9Sstevel@tonic-gate
160*7c478bd9Sstevel@tonic-gate // Get the total length of the audio list
161*7c478bd9Sstevel@tonic-gate Double AudioList::
GetLength() const162*7c478bd9Sstevel@tonic-gate GetLength() const
163*7c478bd9Sstevel@tonic-gate {
164*7c478bd9Sstevel@tonic-gate AudioListEntry* ep;
165*7c478bd9Sstevel@tonic-gate Double sum;
166*7c478bd9Sstevel@tonic-gate Double x;
167*7c478bd9Sstevel@tonic-gate
168*7c478bd9Sstevel@tonic-gate for (sum = 0., ep = first(); ep != 0; ep = ep->next) {
169*7c478bd9Sstevel@tonic-gate // Accumulate times for each extent
170*7c478bd9Sstevel@tonic-gate // Indeterminate extents screw up the calculation
171*7c478bd9Sstevel@tonic-gate x = ep->aptr->GetLength();
172*7c478bd9Sstevel@tonic-gate if (Undefined(x))
173*7c478bd9Sstevel@tonic-gate return (x);
174*7c478bd9Sstevel@tonic-gate sum += x;
175*7c478bd9Sstevel@tonic-gate }
176*7c478bd9Sstevel@tonic-gate return (sum);
177*7c478bd9Sstevel@tonic-gate }
178*7c478bd9Sstevel@tonic-gate
179*7c478bd9Sstevel@tonic-gate // Construct a name for the list
180*7c478bd9Sstevel@tonic-gate char *AudioList::
GetName() const181*7c478bd9Sstevel@tonic-gate GetName() const
182*7c478bd9Sstevel@tonic-gate {
183*7c478bd9Sstevel@tonic-gate // XXX - construct a better name
184*7c478bd9Sstevel@tonic-gate return (Audio::GetName());
185*7c478bd9Sstevel@tonic-gate }
186*7c478bd9Sstevel@tonic-gate
187*7c478bd9Sstevel@tonic-gate // Get the audio header for the current read position
188*7c478bd9Sstevel@tonic-gate AudioHdr AudioList::
GetHeader()189*7c478bd9Sstevel@tonic-gate GetHeader()
190*7c478bd9Sstevel@tonic-gate {
191*7c478bd9Sstevel@tonic-gate return (GetHeader(ReadPosition()));
192*7c478bd9Sstevel@tonic-gate }
193*7c478bd9Sstevel@tonic-gate
194*7c478bd9Sstevel@tonic-gate // Get the audio header for the given position
195*7c478bd9Sstevel@tonic-gate AudioHdr AudioList::
GetHeader(Double pos)196*7c478bd9Sstevel@tonic-gate GetHeader(
197*7c478bd9Sstevel@tonic-gate Double pos) // position
198*7c478bd9Sstevel@tonic-gate {
199*7c478bd9Sstevel@tonic-gate AudioListEntry* ep;
200*7c478bd9Sstevel@tonic-gate
201*7c478bd9Sstevel@tonic-gate // Get the extent pointer for the given position
202*7c478bd9Sstevel@tonic-gate if (!getposition(pos, ep)) {
203*7c478bd9Sstevel@tonic-gate AudioHdr h;
204*7c478bd9Sstevel@tonic-gate
205*7c478bd9Sstevel@tonic-gate if (pos != 0.) {
206*7c478bd9Sstevel@tonic-gate PrintMsg(_MGET_(
207*7c478bd9Sstevel@tonic-gate "AudioHdr:GetHeader()...position is beyond eof"),
208*7c478bd9Sstevel@tonic-gate Warning);
209*7c478bd9Sstevel@tonic-gate return (h);
210*7c478bd9Sstevel@tonic-gate }
211*7c478bd9Sstevel@tonic-gate if ((ep = first()) != 0)
212*7c478bd9Sstevel@tonic-gate return (ep->aptr->GetHeader());
213*7c478bd9Sstevel@tonic-gate return (h);
214*7c478bd9Sstevel@tonic-gate }
215*7c478bd9Sstevel@tonic-gate // Get the header for the proper offset in the extent
216*7c478bd9Sstevel@tonic-gate return (ep->aptr->GetDHeader(pos));
217*7c478bd9Sstevel@tonic-gate }
218*7c478bd9Sstevel@tonic-gate
219*7c478bd9Sstevel@tonic-gate // Copy data from list into specified buffer.
220*7c478bd9Sstevel@tonic-gate // No data format translation takes place.
221*7c478bd9Sstevel@tonic-gate // The object's read position is not updated.
222*7c478bd9Sstevel@tonic-gate //
223*7c478bd9Sstevel@tonic-gate // Since list could contain extents of differing encodings,
224*7c478bd9Sstevel@tonic-gate // clients should always use GetHeader() in combination with ReadData()
225*7c478bd9Sstevel@tonic-gate AudioError AudioList::
ReadData(void * buf,size_t & len,Double & pos)226*7c478bd9Sstevel@tonic-gate ReadData(
227*7c478bd9Sstevel@tonic-gate void* buf, // destination buffer address
228*7c478bd9Sstevel@tonic-gate size_t& len, // buffer size (updated)
229*7c478bd9Sstevel@tonic-gate Double& pos) // start position (updated)
230*7c478bd9Sstevel@tonic-gate {
231*7c478bd9Sstevel@tonic-gate AudioListEntry* ep;
232*7c478bd9Sstevel@tonic-gate size_t cnt;
233*7c478bd9Sstevel@tonic-gate Double off;
234*7c478bd9Sstevel@tonic-gate Double newpos;
235*7c478bd9Sstevel@tonic-gate AudioError err;
236*7c478bd9Sstevel@tonic-gate
237*7c478bd9Sstevel@tonic-gate // Save buffer size
238*7c478bd9Sstevel@tonic-gate cnt = len;
239*7c478bd9Sstevel@tonic-gate
240*7c478bd9Sstevel@tonic-gate // Position must be valid
241*7c478bd9Sstevel@tonic-gate if (Undefined(pos) || (pos < 0.) || ((int)cnt < 0))
242*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_BADARG));
243*7c478bd9Sstevel@tonic-gate
244*7c478bd9Sstevel@tonic-gate // Loop until data is returned or error
245*7c478bd9Sstevel@tonic-gate // XXX - THIS IS WRONG! THE HEADER COULD CHANGE!
246*7c478bd9Sstevel@tonic-gate do {
247*7c478bd9Sstevel@tonic-gate // Get the extent/offset for read position; clear return count
248*7c478bd9Sstevel@tonic-gate len = 0;
249*7c478bd9Sstevel@tonic-gate off = pos;
250*7c478bd9Sstevel@tonic-gate if (!getposition(off, ep)) {
251*7c478bd9Sstevel@tonic-gate err = AUDIO_EOF;
252*7c478bd9Sstevel@tonic-gate err.sys = AUDIO_COPY_INPUT_EOF;
253*7c478bd9Sstevel@tonic-gate return (err);
254*7c478bd9Sstevel@tonic-gate }
255*7c478bd9Sstevel@tonic-gate
256*7c478bd9Sstevel@tonic-gate // Save the offset and read some data
257*7c478bd9Sstevel@tonic-gate newpos = off;
258*7c478bd9Sstevel@tonic-gate len = cnt;
259*7c478bd9Sstevel@tonic-gate err = ep->aptr->ReadData(buf, len, newpos);
260*7c478bd9Sstevel@tonic-gate
261*7c478bd9Sstevel@tonic-gate // If no eof on this list entry, or no more data, we're done
262*7c478bd9Sstevel@tonic-gate if ((err != AUDIO_EOF) || (err.sys != AUDIO_COPY_INPUT_EOF) ||
263*7c478bd9Sstevel@tonic-gate (ep->next == 0)) {
264*7c478bd9Sstevel@tonic-gate break;
265*7c478bd9Sstevel@tonic-gate }
266*7c478bd9Sstevel@tonic-gate
267*7c478bd9Sstevel@tonic-gate // Advance to next list entry
268*7c478bd9Sstevel@tonic-gate // XXX - Is this problemmatic, too?
269*7c478bd9Sstevel@tonic-gate pos += ep->aptr->GetLength() - off;
270*7c478bd9Sstevel@tonic-gate } while (TRUE);
271*7c478bd9Sstevel@tonic-gate
272*7c478bd9Sstevel@tonic-gate // Update the byte count and position
273*7c478bd9Sstevel@tonic-gate pos += (newpos - off); // XXX - recalculate?
274*7c478bd9Sstevel@tonic-gate return (err);
275*7c478bd9Sstevel@tonic-gate }
276*7c478bd9Sstevel@tonic-gate
277*7c478bd9Sstevel@tonic-gate // Write to AudioList is (currently) prohibited
278*7c478bd9Sstevel@tonic-gate AudioError AudioList::
WriteData(void *,size_t & len,Double &)279*7c478bd9Sstevel@tonic-gate WriteData(
280*7c478bd9Sstevel@tonic-gate void*, // destination buffer address
281*7c478bd9Sstevel@tonic-gate size_t& len, // buffer size (updated)
282*7c478bd9Sstevel@tonic-gate Double&) // start position (updated)
283*7c478bd9Sstevel@tonic-gate {
284*7c478bd9Sstevel@tonic-gate len = 0;
285*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_NOEFFECT));
286*7c478bd9Sstevel@tonic-gate }
287*7c478bd9Sstevel@tonic-gate
288*7c478bd9Sstevel@tonic-gate // Insert an entry at the start
289*7c478bd9Sstevel@tonic-gate AudioError AudioList::
Insert(Audio * obj)290*7c478bd9Sstevel@tonic-gate Insert(
291*7c478bd9Sstevel@tonic-gate Audio* obj) // object to insert
292*7c478bd9Sstevel@tonic-gate {
293*7c478bd9Sstevel@tonic-gate Double pos; // insertion offset, in seconds
294*7c478bd9Sstevel@tonic-gate
295*7c478bd9Sstevel@tonic-gate return (Insert(obj, pos = 0.));
296*7c478bd9Sstevel@tonic-gate }
297*7c478bd9Sstevel@tonic-gate
298*7c478bd9Sstevel@tonic-gate // Insert an entry at a specified position
299*7c478bd9Sstevel@tonic-gate AudioError AudioList::
Insert(Audio * obj,Double pos)300*7c478bd9Sstevel@tonic-gate Insert(
301*7c478bd9Sstevel@tonic-gate Audio* obj, // object to insert
302*7c478bd9Sstevel@tonic-gate Double pos) // insertion offset, in seconds
303*7c478bd9Sstevel@tonic-gate {
304*7c478bd9Sstevel@tonic-gate AudioListEntry *ep;
305*7c478bd9Sstevel@tonic-gate AudioListEntry *prev;
306*7c478bd9Sstevel@tonic-gate
307*7c478bd9Sstevel@tonic-gate // Find the insertion point
308*7c478bd9Sstevel@tonic-gate if (first() == 0) {
309*7c478bd9Sstevel@tonic-gate prev = &head; // this is the first extent
310*7c478bd9Sstevel@tonic-gate } else {
311*7c478bd9Sstevel@tonic-gate if (!getposition(pos, prev)) {
312*7c478bd9Sstevel@tonic-gate if (pos == 0.) {
313*7c478bd9Sstevel@tonic-gate // Append extent to end of list
314*7c478bd9Sstevel@tonic-gate return (Append(obj));
315*7c478bd9Sstevel@tonic-gate } else {
316*7c478bd9Sstevel@tonic-gate return (RaiseError(AUDIO_ERR_BADARG));
317*7c478bd9Sstevel@tonic-gate }
318*7c478bd9Sstevel@tonic-gate } else if (pos != 0.) {
319*7c478bd9Sstevel@tonic-gate // The insertion is in an extent, split it in two
320*7c478bd9Sstevel@tonic-gate prev->split(pos);
321*7c478bd9Sstevel@tonic-gate } else {
322*7c478bd9Sstevel@tonic-gate // Insert before the current position
323*7c478bd9Sstevel@tonic-gate prev = prev->prev;
324*7c478bd9Sstevel@tonic-gate }
325*7c478bd9Sstevel@tonic-gate }
326*7c478bd9Sstevel@tonic-gate // Create object and link into list
327*7c478bd9Sstevel@tonic-gate ep = new AudioListEntry(obj);
328*7c478bd9Sstevel@tonic-gate ep->link(prev);
329*7c478bd9Sstevel@tonic-gate
330*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
331*7c478bd9Sstevel@tonic-gate }
332*7c478bd9Sstevel@tonic-gate
333*7c478bd9Sstevel@tonic-gate // Append an entry to a list
334*7c478bd9Sstevel@tonic-gate AudioError AudioList::
Append(Audio * obj)335*7c478bd9Sstevel@tonic-gate Append(
336*7c478bd9Sstevel@tonic-gate Audio* obj) // object to append
337*7c478bd9Sstevel@tonic-gate {
338*7c478bd9Sstevel@tonic-gate AudioListEntry *ep;
339*7c478bd9Sstevel@tonic-gate AudioListEntry *prev;
340*7c478bd9Sstevel@tonic-gate
341*7c478bd9Sstevel@tonic-gate // Find the last extent in the list
342*7c478bd9Sstevel@tonic-gate for (prev = &head; prev->next != 0; prev = prev->next)
343*7c478bd9Sstevel@tonic-gate continue;
344*7c478bd9Sstevel@tonic-gate
345*7c478bd9Sstevel@tonic-gate // Create object and link into list
346*7c478bd9Sstevel@tonic-gate ep = new AudioListEntry(obj);
347*7c478bd9Sstevel@tonic-gate ep->link(prev);
348*7c478bd9Sstevel@tonic-gate return (AUDIO_SUCCESS);
349*7c478bd9Sstevel@tonic-gate }
350*7c478bd9Sstevel@tonic-gate
351*7c478bd9Sstevel@tonic-gate // Copy routine for lists
352*7c478bd9Sstevel@tonic-gate AudioError AudioList::
AsyncCopy(Audio * to,Double & frompos,Double & topos,Double & limit)353*7c478bd9Sstevel@tonic-gate AsyncCopy(
354*7c478bd9Sstevel@tonic-gate Audio* to, // audio object to copy to
355*7c478bd9Sstevel@tonic-gate Double& frompos, // input pos (updated)
356*7c478bd9Sstevel@tonic-gate Double& topos, // output pos (updated)
357*7c478bd9Sstevel@tonic-gate Double& limit) // amt to copy (updated)
358*7c478bd9Sstevel@tonic-gate {
359*7c478bd9Sstevel@tonic-gate AudioListEntry* ep;
360*7c478bd9Sstevel@tonic-gate Double svlim;
361*7c478bd9Sstevel@tonic-gate Double newpos;
362*7c478bd9Sstevel@tonic-gate Double off;
363*7c478bd9Sstevel@tonic-gate AudioError err;
364*7c478bd9Sstevel@tonic-gate
365*7c478bd9Sstevel@tonic-gate svlim = limit;
366*7c478bd9Sstevel@tonic-gate // Loop until data is returned or error
367*7c478bd9Sstevel@tonic-gate // XXX - THIS IS WRONG! THE HEADER COULD CHANGE!
368*7c478bd9Sstevel@tonic-gate do {
369*7c478bd9Sstevel@tonic-gate // Get the extent and offset for the read position
370*7c478bd9Sstevel@tonic-gate off = frompos;
371*7c478bd9Sstevel@tonic-gate if (!getposition(off, ep)) {
372*7c478bd9Sstevel@tonic-gate // nothing written, limit should reflect this
373*7c478bd9Sstevel@tonic-gate limit = 0.0;
374*7c478bd9Sstevel@tonic-gate err = AUDIO_EOF;
375*7c478bd9Sstevel@tonic-gate err.sys = AUDIO_COPY_INPUT_EOF;
376*7c478bd9Sstevel@tonic-gate return (err);
377*7c478bd9Sstevel@tonic-gate }
378*7c478bd9Sstevel@tonic-gate
379*7c478bd9Sstevel@tonic-gate // Save the offset and do a copy
380*7c478bd9Sstevel@tonic-gate newpos = off;
381*7c478bd9Sstevel@tonic-gate limit = svlim;
382*7c478bd9Sstevel@tonic-gate err = ep->aptr->AsyncCopy(to, newpos, topos, limit);
383*7c478bd9Sstevel@tonic-gate
384*7c478bd9Sstevel@tonic-gate // If no eof on this list entry, or no more data, we're done
385*7c478bd9Sstevel@tonic-gate if ((err != AUDIO_EOF) || (err.sys != AUDIO_COPY_INPUT_EOF) ||
386*7c478bd9Sstevel@tonic-gate (ep->next == 0)) {
387*7c478bd9Sstevel@tonic-gate break;
388*7c478bd9Sstevel@tonic-gate }
389*7c478bd9Sstevel@tonic-gate
390*7c478bd9Sstevel@tonic-gate // Advance to next list entry
391*7c478bd9Sstevel@tonic-gate // XXX - Is this problemmatic, too?
392*7c478bd9Sstevel@tonic-gate frompos += ep->aptr->GetLength() - off;
393*7c478bd9Sstevel@tonic-gate } while (TRUE);
394*7c478bd9Sstevel@tonic-gate
395*7c478bd9Sstevel@tonic-gate // Update the byte count and position
396*7c478bd9Sstevel@tonic-gate frompos += (newpos - off); // XXX - recalculate?
397*7c478bd9Sstevel@tonic-gate return (err);
398*7c478bd9Sstevel@tonic-gate }
399