1 /* |
|
2 * Copyright (c) 2010 Ixonos Plc. |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - Initial contribution |
|
11 * |
|
12 * Contributors: |
|
13 * Ixonos Plc |
|
14 * |
|
15 * Description: |
|
16 * |
|
17 */ |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 #ifndef __AUDSONG_H__ |
|
23 #define __AUDSONG_H__ |
|
24 |
|
25 |
|
26 #include <e32base.h> |
|
27 #include <f32file.h> |
|
28 #include <e32std.h> |
|
29 |
|
30 #include "AudCommon.h" |
|
31 #include "AudObservers.h" |
|
32 |
|
33 |
|
34 // define _WRITE_OUTPUT_TO_FILE_ if you want audio engine to write its output to a file |
|
35 //#define _WRITE_OUTPUT_TO_FILE_; |
|
36 |
|
37 |
|
38 /* |
|
39 * Forward declarations. |
|
40 */ |
|
41 |
|
42 |
|
43 class MAudVisualizationObserver; |
|
44 class MAudSongProcessingObserver; |
|
45 class CAudSongProcessOperation; |
|
46 class CAudSongVisualizationOperation; |
|
47 class MAudSongObserver; |
|
48 class CAudClipInfo; |
|
49 class MAudClipInfoObserver; |
|
50 class CAudSongAddClipOperation; |
|
51 class CAudProcessor; |
|
52 |
|
53 // constants that represent special parameter values |
|
54 |
|
55 // clip end time (used when setting cutOut-times) |
|
56 const TInt KClipEndTime = -1; |
|
57 |
|
58 // KAllTrackIndices represents all tracks in ClipCount()-function |
|
59 const TInt KAllTrackIndices = -1; |
|
60 |
|
61 // Let audio engine to decide the bitrate |
|
62 const TInt KAudBitRateDefault = -1; |
|
63 |
|
64 |
|
65 /** |
|
66 * Audio song, which consists of zero or more audio clips |
|
67 * |
|
68 * @see CAudClip |
|
69 */ |
|
70 class CAudSong : public CBase |
|
71 { |
|
72 public: |
|
73 /* Constructors. */ |
|
74 |
|
75 /** |
|
76 * Constructs a new empty CAudSong object. May leave if no resources are available. |
|
77 * |
|
78 * Possible leave codes: |
|
79 * - <code>KErrNoMemory</code> if memory allocation fails |
|
80 * |
|
81 * @param aFs file server session to use to lock the audio |
|
82 * clip files of the new song; or NULL to not to lock the files |
|
83 * @return pointer to a new CAudSong instance |
|
84 */ |
|
85 IMPORT_C static CAudSong* NewL(RFs *aFs); |
|
86 |
|
87 /** |
|
88 * Constructs a new empty CAudSong object and leaves the object in the cleanup stack. |
|
89 * |
|
90 * Possible leave codes: |
|
91 * - <code>KErrNoMemory</code> if memory allocation fails |
|
92 * |
|
93 * @param aFs file server session to use to lock the audio |
|
94 * clip files of the new song; or NULL to not to lock the files |
|
95 * @return pointer to a new CAudSong instance |
|
96 */ |
|
97 IMPORT_C static CAudSong* NewLC(RFs *aFs); |
|
98 |
|
99 /** |
|
100 * Destroys the object and releases all resources. |
|
101 */ |
|
102 IMPORT_C virtual ~CAudSong(); |
|
103 |
|
104 |
|
105 /* Property methods. */ |
|
106 |
|
107 /** |
|
108 * Returns an estimate of the total size of this song. |
|
109 * |
|
110 * @return size estimate in bytes |
|
111 */ |
|
112 IMPORT_C TInt GetSizeEstimateL() const; |
|
113 |
|
114 /** |
|
115 * Returns an estimate of the size of this song between the given time interval. |
|
116 * |
|
117 * @param aStartTime Beginning of the time interval |
|
118 * @param aEndTime End of the time interval |
|
119 * @return size estimate in bytes |
|
120 */ |
|
121 IMPORT_C TInt GetFrameSizeEstimateL(TTimeIntervalMicroSeconds aStartTime, |
|
122 TTimeIntervalMicroSeconds aEndTime) const; |
|
123 |
|
124 /** |
|
125 * Returns the properties of this song. |
|
126 * |
|
127 * @return output file properties |
|
128 */ |
|
129 IMPORT_C TAudFileProperties OutputFileProperties() const; |
|
130 |
|
131 /** |
|
132 * |
|
133 * Generates decoder specific info needed for MP4 |
|
134 * Caller is responsible for releasing aDecSpecInfo in the case ETrue is returned |
|
135 * |
|
136 * @param aMaxSize maximum aDecSpecInfo size allowed |
|
137 * |
|
138 */ |
|
139 IMPORT_C TBool GetMP4DecoderSpecificInfoLC(HBufC8*& aDecSpecInfo, TInt aMaxSize) const; |
|
140 |
|
141 /** |
|
142 * Get processing time estimate based on trial. Asynchronous version, requires observer. |
|
143 * |
|
144 */ |
|
145 IMPORT_C TBool GetTimeEstimateL(MAudTimeEstimateObserver& aObserver, |
|
146 TAudType aAudType, |
|
147 TInt aSamplingRate, |
|
148 TChannelMode aChannelMode, |
|
149 TInt aBitRate = -1); |
|
150 |
|
151 /** |
|
152 * Get processing time estimate based on hardcoded constants. Synchronous version. |
|
153 * |
|
154 * @return estimated processing time for the song |
|
155 */ |
|
156 IMPORT_C TTimeIntervalMicroSeconds GetTimeEstimateL(); |
|
157 |
|
158 /** |
|
159 * Get the frame duration in microseconds. |
|
160 * |
|
161 * @return frame duration in microseconds |
|
162 */ |
|
163 IMPORT_C TInt GetFrameDurationMicro(); |
|
164 |
|
165 |
|
166 /* Audio clip management methods. */ |
|
167 |
|
168 /** |
|
169 * Returns the number of audio clips in this song on a certain track. |
|
170 * |
|
171 * @param aTrackIndex track index |
|
172 * |
|
173 * @return number of audio clips on a defined track |
|
174 */ |
|
175 IMPORT_C TInt ClipCount(TInt aTrackIndex = 0) const; |
|
176 |
|
177 /** |
|
178 * Returns the audio clip at the specified index. |
|
179 * Panics with code <code>EAudioClipIllegalIndex</code> if the clip index is invalid. |
|
180 * |
|
181 * @param aIndex index of the clip on the certain track |
|
182 * @param aTrackIndex index of the track |
|
183 * |
|
184 * @return clip at the specified index. |
|
185 */ |
|
186 IMPORT_C CAudClip* Clip(TInt aIndex, TInt aTrackIndex = 0) const; |
|
187 |
|
188 /** |
|
189 * Adds the specified audio clip to this song. Asynchronous operation |
|
190 * CAudSongObserver::NotifyClipAdded or CAudSongObserver::NotifyClipAddingFailed |
|
191 * is called once the operation has completed. |
|
192 * |
|
193 * Possible leave codes: |
|
194 * - <code>KErrNoMemory</code> if memory allocation fails |
|
195 * - <code>KErrNotSupported</code> if audio format is not supported |
|
196 * |
|
197 * @param aFileName file name of the clip to add |
|
198 * @param aStartTime start time of the clip in song timebase |
|
199 * @param aTrackIndex track index. Used to categorize clips. |
|
200 */ |
|
201 IMPORT_C void AddClipL(const TDesC& aFileName, |
|
202 TTimeIntervalMicroSeconds aStartTime, TInt aTrackIndex = 0, |
|
203 TTimeIntervalMicroSeconds aCutInTime = TTimeIntervalMicroSeconds(0), |
|
204 TTimeIntervalMicroSeconds aCutOutTime = TTimeIntervalMicroSeconds(KClipEndTime)); |
|
205 |
|
206 |
|
207 /** |
|
208 * Removes the audio clip at the specified index from this song. |
|
209 * Panics with code <code>USER-130</code> if the clip index is invalid. |
|
210 * |
|
211 * @param aIndex index of the clip to be removed |
|
212 * @param aTrackIndex track index |
|
213 */ |
|
214 IMPORT_C void RemoveClip(TInt aIndex, TInt aTrackIndex = 0); |
|
215 |
|
216 /** |
|
217 * Removes all audio clips and clears all effects |
|
218 * |
|
219 * @param aNotify ETrue if observer should be notified |
|
220 */ |
|
221 IMPORT_C void Reset(TBool aNotify); |
|
222 |
|
223 /** |
|
224 * |
|
225 * Sets the duration of the output clip |
|
226 * If necessary, silence is generated in the end |
|
227 * |
|
228 * @param aDuration output clip length in microseconds |
|
229 * |
|
230 * @return ETrue if a new duration was set, EFalse otherwise |
|
231 * |
|
232 */ |
|
233 IMPORT_C TBool SetDuration(TTimeIntervalMicroSeconds aDuration); |
|
234 |
|
235 |
|
236 /* Processing methods. */ |
|
237 |
|
238 |
|
239 /** |
|
240 * Removes a dynamic level mark in a song. |
|
241 * Panics with code <code>EAudioClipIllegalIndex</code> |
|
242 * if the clip index is invalid. |
|
243 * |
|
244 * @param aIndex index of the removed mark in this song |
|
245 * @return ETrue if mark was removed, EFalse otherwise |
|
246 */ |
|
247 IMPORT_C TBool RemoveDynamicLevelMark(TInt aIndex); |
|
248 |
|
249 |
|
250 /** |
|
251 * Sets an output file format |
|
252 * |
|
253 * NOTE: only the following combinations are allowed: |
|
254 * AMR: single channel, 8000 Hz, 12000 kbps |
|
255 * |
|
256 * AAC/16kHz mono/stereo |
|
257 * AAC/48kHz mono/stereo |
|
258 * |
|
259 * @return ETrue if format was successfully changed, |
|
260 * EFalse if format cannot be set |
|
261 */ |
|
262 IMPORT_C TBool SetOutputFileFormat(TAudType aAudType, |
|
263 TInt aSamplingRate, |
|
264 TChannelMode aChannelMode, |
|
265 TInt aBitRate = KAudBitRateDefault); |
|
266 |
|
267 /** |
|
268 * Checks if given properties are supported |
|
269 * |
|
270 * |
|
271 * @param aProperties audio properties |
|
272 * @return ETrue if properties are supported |
|
273 * EFalse if not |
|
274 */ |
|
275 IMPORT_C TBool AreOutputPropertiesSupported(const TAudFileProperties& aProperties ); |
|
276 |
|
277 |
|
278 /* |
|
279 * Processing methods |
|
280 */ |
|
281 |
|
282 /** |
|
283 * Starts a synchronous audio processing operation. After calling this function |
|
284 * the current song can be processed frame by frame by calling ProcessPieceL-function |
|
285 * Panics with |
|
286 * <code>TAudPanic::ESongEmpty</code> if there are no clips |
|
287 * in the song. |
|
288 * |
|
289 */ |
|
290 IMPORT_C TBool SyncStartProcessingL(); |
|
291 |
|
292 /** |
|
293 * Processes synchronously next audio frame and passes it to the caller. |
|
294 * If a processing operation has not been started, panic |
|
295 * <code>TAudPanic::ESongProcessingNotRunning</code> is raised. |
|
296 * |
|
297 * Possibly leave codes: |
|
298 * - <code>KErrNoMemory</code> if memory allocation fails |
|
299 * |
|
300 * NOTE: This function allocates memory and the caller is responsible for |
|
301 * releasing it. |
|
302 * |
|
303 * @param aFrame pointer to a processed audio frame. Has to be deleted |
|
304 * when not needed anymore. |
|
305 * @param aDuration Duration of processed audio frame in microseconds |
|
306 * after decoding |
|
307 * |
|
308 * @return ETrue Processing operation completed, no more frames to be processed. |
|
309 * No memory allocated. |
|
310 * EFalse Processing operation not completed. Last processed frame stored |
|
311 * in <code>aFrame</code>. Memory allocated for the processed frame |
|
312 * |
|
313 */ |
|
314 IMPORT_C TBool SyncProcessFrameL(HBufC8*& aFrame, TInt& aProgress, |
|
315 TTimeIntervalMicroSeconds& aDuration); |
|
316 |
|
317 |
|
318 /** |
|
319 * Cancels the processing operation. Used for only synchronous processing |
|
320 * operations. If an operation is not running, |
|
321 * panic <code>TAudPanic::ESongProcessingNotRunning</code> is raised |
|
322 */ |
|
323 IMPORT_C void SyncCancelProcess(); |
|
324 |
|
325 |
|
326 /* Observer methods. */ |
|
327 |
|
328 /** |
|
329 * Registers a song observer. Panics with panic code |
|
330 * <code>ESongObserverAlreadyRegistered</code> if the song observer is |
|
331 * already registered. |
|
332 * |
|
333 * @param aObserver observer that will receive the events |
|
334 */ |
|
335 IMPORT_C void RegisterSongObserverL(MAudSongObserver* aObserver); |
|
336 |
|
337 /** |
|
338 * Unregisters a song observer. Panics with panic code |
|
339 * <code>ESongObserverNotRegistered</code> if the song observer is not registered. |
|
340 * |
|
341 * @param aObserver observer to be unregistered |
|
342 */ |
|
343 IMPORT_C void UnregisterSongObserver(MAudSongObserver* aObserver); |
|
344 |
|
345 |
|
346 /** |
|
347 * Adds the specified audio clip to this song. Asynchronous operation |
|
348 * CAudSongObserver::NotifyClipAdded or CAudSongObserver::NotifyClipAddingFailed |
|
349 * is called once the operation has completed. |
|
350 * |
|
351 * Possible leave codes: |
|
352 * - <code>KErrNoMemory</code> if memory allocation fails |
|
353 * - <code>KErrNotSupported</code> if audio format is not supported |
|
354 * |
|
355 * @param aFileHandle file handle of the clip to add |
|
356 * @param aStartTime start time of the clip in song timebase |
|
357 * @param aTrackIndex track index. Used to categorize clips. |
|
358 */ |
|
359 IMPORT_C void AddClipL(RFile* aFileHandle, |
|
360 TTimeIntervalMicroSeconds aStartTime, TInt aTrackIndex = 0, |
|
361 TTimeIntervalMicroSeconds aCutInTime = TTimeIntervalMicroSeconds(0), |
|
362 TTimeIntervalMicroSeconds aCutOutTime = TTimeIntervalMicroSeconds(KClipEndTime)); |
|
363 |
|
364 |
|
365 private: |
|
366 |
|
367 |
|
368 // C++ constructor |
|
369 CAudSong(RFs *aFs); |
|
370 |
|
371 // functions for keeping clip indexes and arrays up to date |
|
372 void UpdateClipIndexes(); |
|
373 void UpdateClipArray(); |
|
374 |
|
375 /** |
|
376 * Returns a track domain clip index |
|
377 * of the clip whose song doman index is <code>aIndex</code> |
|
378 */ |
|
379 TInt Index2IndexOnTrack(TInt aIndex); |
|
380 |
|
381 /* |
|
382 * Returns a song domain clip index |
|
383 */ |
|
384 TInt FindClipIndexOnSong(const CAudClip* aClip) const; |
|
385 |
|
386 /* |
|
387 * ConstructL |
|
388 */ |
|
389 |
|
390 void ConstructL(); |
|
391 |
|
392 private: |
|
393 |
|
394 // Member variables |
|
395 |
|
396 // File server session. |
|
397 RFs* iFs; |
|
398 // Audio clip array. |
|
399 RPointerArray<CAudClip> iClipArray; |
|
400 |
|
401 // Marks used for manual level controlling |
|
402 RPointerArray<TAudDynamicLevelMark> iDynamicLevelMarkArray; |
|
403 |
|
404 // Properties of the output file. |
|
405 TAudFileProperties* iProperties; |
|
406 |
|
407 // Duration of the song |
|
408 // if iSongDuration is greater than the cut out time of the last output clip, |
|
409 // silence is generated in the end |
|
410 TTimeIntervalMicroSeconds iSongDuration; |
|
411 |
|
412 // a flag to indicate whether the user has set the duration manually |
|
413 // if not, the duration is the cutOutTime of the last input clip |
|
414 TBool iSongDurationManuallySet; |
|
415 |
|
416 // Observer array of the song class. |
|
417 RPointerArray<MAudSongObserver> iObserverArray; |
|
418 |
|
419 // Normalizing of this audio clip. |
|
420 // If ETrue, the song as a whole is to be normalized |
|
421 TBool iNormalize; |
|
422 |
|
423 // process operation owned by this |
|
424 CAudSongProcessOperation* iProcessOperation; |
|
425 |
|
426 // clip adding operation owned by this |
|
427 CAudSongAddClipOperation* iAddOperation; |
|
428 |
|
429 // song visualization operation owned by this |
|
430 CAudSongVisualizationOperation* iVisualizationOperation; |
|
431 |
|
432 |
|
433 private: |
|
434 |
|
435 // Notifications to fire callbacks to all registered listeners --------> |
|
436 |
|
437 void FireClipAdded(CAudSong* aSong, CAudClip* aClip, TInt aIndex, TInt aTrackIndex); |
|
438 |
|
439 void FireClipAddingFailed(CAudSong* aSong, TInt aError, TInt aTrackIndex); |
|
440 |
|
441 void FireClipRemoved(CAudSong* aSong, TInt aIndex, TInt aTrackIndex); |
|
442 |
|
443 void FireClipIndicesChanged(CAudSong* aSong, TInt aOldIndex, |
|
444 TInt aNewIndex, TInt aTrackIndex); |
|
445 |
|
446 void FireClipTimingsChanged(CAudSong* aSong, CAudClip* aClip); |
|
447 |
|
448 void FireDynamicLevelMarkInserted(CAudSong& aSong, |
|
449 TAudDynamicLevelMark& aMark, |
|
450 TInt aIndex); |
|
451 |
|
452 void FireDynamicLevelMarkInserted(CAudClip& aClip, |
|
453 TAudDynamicLevelMark& aMark, |
|
454 TInt aIndex); |
|
455 |
|
456 void FireDynamicLevelMarkRemoved(CAudSong& aSong, TInt aIndex); |
|
457 void FireDynamicLevelMarkRemoved(CAudClip& aClip, TInt aIndex); |
|
458 void FireSongReseted(CAudSong& aSong); |
|
459 void FireClipReseted(CAudClip& aClip); |
|
460 |
|
461 // <------------ Notifications to fire callbacks to all registered listeners |
|
462 |
|
463 friend class CAudSongAddClipOperation; |
|
464 friend class CAudClip; |
|
465 friend class CAudProcessorImpl; |
|
466 |
|
467 |
|
468 #ifdef _WRITE_OUTPUT_TO_FILE_ |
|
469 |
|
470 TBool iFileOpen; |
|
471 RFs iDebFs; |
|
472 RFile iAudioFile; |
|
473 RFile iTextFile; |
|
474 |
|
475 |
|
476 #endif |
|
477 |
|
478 }; |
|
479 |
|
480 |
|
481 // Abstract interface class to get events from audio processor |
|
482 |
|
483 class MProcProcessObserver |
|
484 { |
|
485 |
|
486 public: |
|
487 /** |
|
488 * Called to notify that a new audio processing operation has been started. |
|
489 * |
|
490 */ |
|
491 virtual void NotifyAudioProcessingStartedL() = 0; |
|
492 |
|
493 /** |
|
494 * Called to inform about the current progress of the audio processing operation. |
|
495 * |
|
496 * @param aPercentage percentage of the operation completed, must be |
|
497 * in range 0..100 |
|
498 */ |
|
499 virtual void NotifyAudioProcessingProgressed(TInt aPercentage) = 0; |
|
500 |
|
501 /** |
|
502 * Called to notify that the song processing operation has been completed. |
|
503 * |
|
504 * @param aError error code why the operation was completed. |
|
505 * <code>KErrNone</code> if the operation was completed |
|
506 * successfully. |
|
507 */ |
|
508 virtual void NotifyAudioProcessingCompleted(TInt aError) = 0; |
|
509 |
|
510 }; |
|
511 |
|
512 |
|
513 |
|
514 /** |
|
515 * Internal class for processing a song. |
|
516 */ |
|
517 class CAudSongProcessOperation : public CBase, public MProcProcessObserver, public MAudTimeEstimateObserver |
|
518 { |
|
519 |
|
520 |
|
521 |
|
522 public: |
|
523 |
|
524 |
|
525 static CAudSongProcessOperation* NewL(CAudSong* aSong); |
|
526 |
|
527 // From MProcProcessObserver |
|
528 |
|
529 void NotifyAudioProcessingStartedL(); |
|
530 void NotifyAudioProcessingProgressed(TInt aPercentage); |
|
531 void NotifyAudioProcessingCompleted(TInt aError); |
|
532 |
|
533 // From // MAudTimeEstimateObserver |
|
534 void NotifyTimeEstimateReady(TInt64 aTimeEstimate); |
|
535 |
|
536 /** |
|
537 * Starts asyncronous processing a song |
|
538 * |
|
539 * Can leave with one of the system wide error codes |
|
540 * |
|
541 * Possible panic code |
|
542 * <code>ESongProcessingOperationAlreadyRunning</code> |
|
543 * |
|
544 * @param aFileName output file name |
|
545 * @param aObserver an observer to be notified of progress |
|
546 * @param aPriority priority of audio processing operation |
|
547 */ |
|
548 void StartASyncProcL(const TDesC& aFileName, |
|
549 MAudSongProcessingObserver& aObserver, TInt aPriority); |
|
550 |
|
551 |
|
552 /** |
|
553 * Starts syncronous song processing |
|
554 * |
|
555 * Can leave with one of the system wide error codes |
|
556 * |
|
557 * Possible panic code |
|
558 * <code>ESongProcessingOperationAlreadyRunning</code> |
|
559 * |
|
560 */ |
|
561 TBool StartSyncProcL(); |
|
562 |
|
563 |
|
564 /** |
|
565 * Processes synchronously next audio frame and passes it to the caller. |
|
566 * If a processing operation has not been started, panic |
|
567 * <code>TAudPanic::ESongProcessingNotRunning</code> is raised. |
|
568 * |
|
569 * Possibly leave codes: |
|
570 * - <code>KErrNoMemory</code> if memory allocation fails |
|
571 * |
|
572 * NOTE: This function allocates memory and the caller is responsible for |
|
573 * releasing it. |
|
574 * |
|
575 * @param aFrame pointer to a processed audio frame. Has to be deleted |
|
576 * when not needed anymore. |
|
577 * @param aDuration Duration of processed audio frame in microseconds |
|
578 * after decoding |
|
579 * |
|
580 * @return ETrue Processing operation completed, no more frames to be processed. |
|
581 * No memory allocated. |
|
582 * EFalse Processing operation not completed. Last processed frame stored |
|
583 * in <code>aFrame</code>. Memory allocated for the processed frame |
|
584 * |
|
585 */ |
|
586 TBool ProcessSyncPieceL(HBufC8*& aFrame, TInt& aProgress, |
|
587 TTimeIntervalMicroSeconds& aDuration); |
|
588 |
|
589 /** |
|
590 * Cancels both syncronous and and asyncronous song processing operation and deletes the output file |
|
591 * |
|
592 * Possible panic code |
|
593 * <code>ESongProcessingOperationNotRunning</code> |
|
594 * |
|
595 */ |
|
596 void Cancel(); |
|
597 |
|
598 TBool GetTimeEstimateL(MAudTimeEstimateObserver& aTEObserver); |
|
599 |
|
600 |
|
601 private: |
|
602 |
|
603 CAudSongProcessOperation(CAudSong* aSong); |
|
604 void ConstructL(); |
|
605 virtual ~CAudSongProcessOperation(); |
|
606 |
|
607 private: |
|
608 |
|
609 /* |
|
610 * Member Variables |
|
611 */ |
|
612 |
|
613 // song |
|
614 CAudSong *iSong; |
|
615 |
|
616 // song processing observer |
|
617 MAudSongProcessingObserver* iObserver; |
|
618 |
|
619 // time estimate observer |
|
620 MAudTimeEstimateObserver* iTEObserver; |
|
621 |
|
622 // A flag that indicates whether this song has changed since |
|
623 // the last processing |
|
624 TBool iChanged; |
|
625 |
|
626 // processor owned by this |
|
627 CAudProcessor* iProcessor; |
|
628 |
|
629 friend class CAudSong; |
|
630 |
|
631 |
|
632 }; |
|
633 |
|
634 |
|
635 /** |
|
636 * Internal class for adding clips. |
|
637 */ |
|
638 class CAudSongAddClipOperation : public CBase, public MAudClipInfoObserver |
|
639 { |
|
640 |
|
641 public: |
|
642 |
|
643 /* |
|
644 * Constuctor & destructor |
|
645 */ |
|
646 |
|
647 static CAudSongAddClipOperation* NewL(CAudSong* aSong); |
|
648 |
|
649 virtual ~CAudSongAddClipOperation(); |
|
650 |
|
651 /* |
|
652 * From base class MAudClipInfoObserver |
|
653 */ |
|
654 virtual void NotifyClipInfoReady(CAudClipInfo& aInfo, |
|
655 TInt aError); |
|
656 |
|
657 |
|
658 private: |
|
659 |
|
660 /* |
|
661 * ConstructL |
|
662 */ |
|
663 void ConstructL(); |
|
664 |
|
665 /* |
|
666 * C++ constructor |
|
667 */ |
|
668 CAudSongAddClipOperation(CAudSong* aSong); |
|
669 |
|
670 /* |
|
671 * Completes add clip operation |
|
672 */ |
|
673 void CompleteAddClipOperation(); |
|
674 |
|
675 |
|
676 private: |
|
677 |
|
678 // song |
|
679 CAudSong* iSong; |
|
680 |
|
681 // clip that we are trying to add |
|
682 CAudClip* iClip; |
|
683 |
|
684 // error possible caught by callback function NotifyClipInfoReady |
|
685 TInt iError; |
|
686 |
|
687 friend class CAudSong; |
|
688 }; |
|
689 |
|
690 |
|
691 |
|
692 #endif |
|