summaryrefslogtreecommitdiff
path: root/indra/llaudio/llaudiodecodemgr.cpp
blob: c82f194ff4a2fa4b1e4f636840f3d71993feae8d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
/** 
 * @file llaudiodecodemgr.cpp
 *
 * $LicenseInfo:firstyear=2003&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"

#include "llaudiodecodemgr.h"

#include "llaudioengine.h"
#include "lllfsthread.h"
#include "llvfile.h"
#include "llstring.h"
#include "lldir.h"
#include "llendianswizzle.h"
#include "llassetstorage.h"
#include "llrefcount.h"

#include "llvorbisencode.h"

#include "vorbis/codec.h"
#include "vorbis/vorbisfile.h"

extern LLAudioEngine *gAudiop;

LLAudioDecodeMgr *gAudioDecodeMgrp = NULL;

static const S32 WAV_HEADER_SIZE = 44;


//////////////////////////////////////////////////////////////////////////////


class LLVorbisDecodeState : public LLRefCount
{
public:
	class WriteResponder : public LLLFSThread::Responder
	{
	public:
		WriteResponder(LLVorbisDecodeState* decoder) : mDecoder(decoder) {}
		~WriteResponder() {}
		void completed(S32 bytes)
		{
			mDecoder->ioComplete(bytes);
		}
		LLPointer<LLVorbisDecodeState> mDecoder;
	};
	
	LLVorbisDecodeState(const LLUUID &uuid, const std::string &out_filename);

	BOOL initDecode();
	BOOL decodeSection(); // Return TRUE if done.
	BOOL finishDecode();

	void flushBadFile();

	void ioComplete(S32 bytes)			{ mBytesRead = bytes; }
	BOOL isValid() const				{ return mValid; }
	BOOL isDone() const					{ return mDone; }
	const LLUUID &getUUID() const		{ return mUUID; }

protected:
	virtual ~LLVorbisDecodeState();

	BOOL mValid;
	BOOL mDone;
	LLAtomicS32 mBytesRead;
	LLUUID mUUID;

	std::vector<U8> mWAVBuffer;
#if !defined(USE_WAV_VFILE)
	std::string mOutFilename;
	LLLFSThread::handle_t mFileHandle;
#endif
	
	LLVFile *mInFilep;
	OggVorbis_File mVF;
	S32 mCurrentSection;
};

size_t vfs_read(void *ptr, size_t size, size_t nmemb, void *datasource)
{
	LLVFile *file = (LLVFile *)datasource;

	if (file->read((U8*)ptr, (S32)(size * nmemb)))	/*Flawfinder: ignore*/
	{
		S32 read = file->getLastBytesRead();
		return  read / size;	/*Flawfinder: ignore*/
	}
	else
	{
		return 0;
	}
}

int vfs_seek(void *datasource, ogg_int64_t offset, int whence)
{
	LLVFile *file = (LLVFile *)datasource;

	// vfs has 31-bit files
	if (offset > S32_MAX)
	{
		return -1;
	}

	S32 origin;
	switch (whence) {
	case SEEK_SET:
		origin = 0;
		break;
	case SEEK_END:
		origin = file->getSize();
		break;
	case SEEK_CUR:
		origin = -1;
		break;
	default:
		llerrs << "Invalid whence argument to vfs_seek" << llendl;
		return -1;
	}

	if (file->seek((S32)offset, origin))
	{
		return 0;
	}
	else
	{
		return -1;
	}
}

int vfs_close (void *datasource)
{
	LLVFile *file = (LLVFile *)datasource;
	delete file;
	return 0;
}

long vfs_tell (void *datasource)
{
	LLVFile *file = (LLVFile *)datasource;
	return file->tell();
}

LLVorbisDecodeState::LLVorbisDecodeState(const LLUUID &uuid, const std::string &out_filename)
{
	mDone = FALSE;
	mValid = FALSE;
	mBytesRead = -1;
	mUUID = uuid;
	mInFilep = NULL;
	mCurrentSection = 0;
#if !defined(USE_WAV_VFILE)
	mOutFilename = out_filename;
	mFileHandle = LLLFSThread::nullHandle();
#endif
	// No default value for mVF, it's an ogg structure?
	// Hey, let's zero it anyway, for predictability.
	memset(&mVF, 0, sizeof(mVF));
}

LLVorbisDecodeState::~LLVorbisDecodeState()
{
	if (!mDone)
	{
		delete mInFilep;
		mInFilep = NULL;
	}
}


BOOL LLVorbisDecodeState::initDecode()
{
	ov_callbacks vfs_callbacks;
	vfs_callbacks.read_func = vfs_read;
	vfs_callbacks.seek_func = vfs_seek;
	vfs_callbacks.close_func = vfs_close;
	vfs_callbacks.tell_func = vfs_tell;

	//llinfos << "Initing decode from vfile: " << mUUID << llendl;

	mInFilep = new LLVFile(gVFS, mUUID, LLAssetType::AT_SOUND);
	if (!mInFilep || !mInFilep->getSize())
	{
		llwarns << "unable to open vorbis source vfile for reading" << llendl;
		delete mInFilep;
		mInFilep = NULL;
		return FALSE;
	}

	int r = ov_open_callbacks(mInFilep, &mVF, NULL, 0, vfs_callbacks);
	if(r < 0) 
	{
		llwarns << r << " Input to vorbis decode does not appear to be an Ogg bitstream: " << mUUID << llendl;
		return(FALSE);
	}
	
	S32 sample_count = ov_pcm_total(&mVF, -1);
	size_t size_guess = (size_t)sample_count;
	vorbis_info* vi = ov_info(&mVF, -1);
	size_guess *= vi->channels;
	size_guess *= 2;
	size_guess += 2048;
	
	bool abort_decode = false;
	
	if (vi)
	{
		if( vi->channels < 1 || vi->channels > LLVORBIS_CLIP_MAX_CHANNELS )
		{
			abort_decode = true;
			llwarns << "Bad channel count: " << vi->channels << llendl;
		}
	}
	else // !vi
	{
		abort_decode = true;
		llwarns << "No default bitstream found" << llendl;	
	}
	
	if( (size_t)sample_count > LLVORBIS_CLIP_REJECT_SAMPLES ||
	    (size_t)sample_count <= 0)
	{
		abort_decode = true;
		llwarns << "Illegal sample count: " << sample_count << llendl;
	}
	
	if( size_guess > LLVORBIS_CLIP_REJECT_SIZE ||
	    size_guess < 0)
	{
		abort_decode = true;
		llwarns << "Illegal sample size: " << size_guess << llendl;
	}
	
	if( abort_decode )
	{
		llwarns << "Canceling initDecode. Bad asset: " << mUUID << llendl;
		vorbis_comment* comment = ov_comment(&mVF,-1);
		if (comment && comment->vendor)
		{
			llwarns << "Bad asset encoded by: " << comment->vendor << llendl;
		}
		delete mInFilep;
		mInFilep = NULL;
		return FALSE;
	}
	
	mWAVBuffer.reserve(size_guess);
	mWAVBuffer.resize(WAV_HEADER_SIZE);

	{
		// write the .wav format header
		//"RIFF"
		mWAVBuffer[0] = 0x52;
		mWAVBuffer[1] = 0x49;
		mWAVBuffer[2] = 0x46;
		mWAVBuffer[3] = 0x46;

		// length = datalen + 36 (to be filled in later)
		mWAVBuffer[4] = 0x00;
		mWAVBuffer[5] = 0x00;
		mWAVBuffer[6] = 0x00;
		mWAVBuffer[7] = 0x00;

		//"WAVE"
		mWAVBuffer[8] = 0x57;
		mWAVBuffer[9] = 0x41;
		mWAVBuffer[10] = 0x56;
		mWAVBuffer[11] = 0x45;

		// "fmt "
		mWAVBuffer[12] = 0x66;
		mWAVBuffer[13] = 0x6D;
		mWAVBuffer[14] = 0x74;
		mWAVBuffer[15] = 0x20;

		// chunk size = 16
		mWAVBuffer[16] = 0x10;
		mWAVBuffer[17] = 0x00;
		mWAVBuffer[18] = 0x00;
		mWAVBuffer[19] = 0x00;

		// format (1 = PCM)
		mWAVBuffer[20] = 0x01;
		mWAVBuffer[21] = 0x00;

		// number of channels
		mWAVBuffer[22] = 0x01;
		mWAVBuffer[23] = 0x00;

		// samples per second
		mWAVBuffer[24] = 0x44;
		mWAVBuffer[25] = 0xAC;
		mWAVBuffer[26] = 0x00;
		mWAVBuffer[27] = 0x00;

		// average bytes per second
		mWAVBuffer[28] = 0x88;
		mWAVBuffer[29] = 0x58;
		mWAVBuffer[30] = 0x01;
		mWAVBuffer[31] = 0x00;

		// bytes to output at a single time
		mWAVBuffer[32] = 0x02;
		mWAVBuffer[33] = 0x00;
		 
		// 16 bits per sample
		mWAVBuffer[34] = 0x10;
		mWAVBuffer[35] = 0x00;

		// "data"
		mWAVBuffer[36] = 0x64;
		mWAVBuffer[37] = 0x61;
		mWAVBuffer[38] = 0x74;
		mWAVBuffer[39] = 0x61;

		// these are the length of the data chunk, to be filled in later
		mWAVBuffer[40] = 0x00;
		mWAVBuffer[41] = 0x00;
		mWAVBuffer[42] = 0x00;
		mWAVBuffer[43] = 0x00;
	}
	
	//{
		//char **ptr=ov_comment(&mVF,-1)->user_comments;
//		vorbis_info *vi=ov_info(&vf,-1);
		//while(*ptr){
		//	fprintf(stderr,"%s\n",*ptr);
		//	++ptr;
		//}
//    fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
//    fprintf(stderr,"\nDecoded length: %ld samples\n", (long)ov_pcm_total(&vf,-1));
//    fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
	//}
	return TRUE;
}

BOOL LLVorbisDecodeState::decodeSection()
{
	if (!mInFilep)
	{
		llwarns << "No VFS file to decode in vorbis!" << llendl;
		return TRUE;
	}
	if (mDone)
	{
// 		llwarns << "Already done with decode, aborting!" << llendl;
		return TRUE;
	}
	char pcmout[4096];	/*Flawfinder: ignore*/

	BOOL eof = FALSE;
	long ret=ov_read(&mVF, pcmout, sizeof(pcmout), 0, 2, 1, &mCurrentSection);
	if (ret == 0)
	{
		/* EOF */
		eof = TRUE;
		mDone = TRUE;
		mValid = TRUE;
//			llinfos << "Vorbis EOF" << llendl;
	}
	else if (ret < 0)
	{
		/* error in the stream.  Not a problem, just reporting it in
		   case we (the app) cares.  In this case, we don't. */

		llwarns << "BAD vorbis decode in decodeSection." << llendl;

		mValid = FALSE;
		mDone = TRUE;
		// We're done, return TRUE.
		return TRUE;
	}
	else
	{
//			llinfos << "Vorbis read " << ret << "bytes" << llendl;
		/* we don't bother dealing with sample rate changes, etc, but.
		   you'll have to*/
		std::copy(pcmout, pcmout+ret, std::back_inserter(mWAVBuffer));
	}
	return eof;
}

BOOL LLVorbisDecodeState::finishDecode()
{
	if (!isValid())
	{
		llwarns << "Bogus vorbis decode state for " << getUUID() << ", aborting!" << llendl;
		return TRUE; // We've finished
	}

#if !defined(USE_WAV_VFILE)	
	if (mFileHandle == LLLFSThread::nullHandle())
#endif
	{
		ov_clear(&mVF);
  
		// write "data" chunk length, in little-endian format
		S32 data_length = mWAVBuffer.size() - WAV_HEADER_SIZE;
		mWAVBuffer[40] = (data_length) & 0x000000FF;
		mWAVBuffer[41] = (data_length >> 8) & 0x000000FF;
		mWAVBuffer[42] = (data_length >> 16) & 0x000000FF;
		mWAVBuffer[43] = (data_length >> 24) & 0x000000FF;
		// write overall "RIFF" length, in little-endian format
		data_length += 36;
		mWAVBuffer[4] = (data_length) & 0x000000FF;
		mWAVBuffer[5] = (data_length >> 8) & 0x000000FF;
		mWAVBuffer[6] = (data_length >> 16) & 0x000000FF;
		mWAVBuffer[7] = (data_length >> 24) & 0x000000FF;

		//
		// FUDGECAKES!!! Vorbis encode/decode messes up loop point transitions (pop)
		// do a cheap-and-cheesy crossfade 
		//
		{
			S16 *samplep;
			S32 i;
			S32 fade_length;
			char pcmout[4096];		/*Flawfinder: ignore*/ 	

			fade_length = llmin((S32)128,(S32)(data_length-36)/8);			
			if((S32)mWAVBuffer.size() >= (WAV_HEADER_SIZE + 2* fade_length))
			{
				memcpy(pcmout, &mWAVBuffer[WAV_HEADER_SIZE], (2 * fade_length));	/*Flawfinder: ignore*/
			}
			llendianswizzle(&pcmout, 2, fade_length);
	
			samplep = (S16 *)pcmout;
			for (i = 0 ;i < fade_length; i++)
			{
				*samplep = llfloor((F32)*samplep * ((F32)i/(F32)fade_length));
				samplep++;
			}

			llendianswizzle(&pcmout, 2, fade_length);			
			if((WAV_HEADER_SIZE+(2 * fade_length)) < (S32)mWAVBuffer.size())
			{
				memcpy(&mWAVBuffer[WAV_HEADER_SIZE], pcmout, (2 * fade_length));	/*Flawfinder: ignore*/
			}
			S32 near_end = mWAVBuffer.size() - (2 * fade_length);
			if ((S32)mWAVBuffer.size() >= ( near_end + 2* fade_length))
			{
				memcpy(pcmout, &mWAVBuffer[near_end], (2 * fade_length));	/*Flawfinder: ignore*/
			}
			llendianswizzle(&pcmout, 2, fade_length);

			samplep = (S16 *)pcmout;
			for (i = fade_length-1 ; i >=  0; i--)
			{
				*samplep = llfloor((F32)*samplep * ((F32)i/(F32)fade_length));
				samplep++;
			}
	
			llendianswizzle(&pcmout, 2, fade_length);			
			if (near_end + (2 * fade_length) < (S32)mWAVBuffer.size())
			{
				memcpy(&mWAVBuffer[near_end], pcmout, (2 * fade_length));/*Flawfinder: ignore*/
			}
		}

		if (36 == data_length)
		{
			llwarns << "BAD Vorbis decode in finishDecode!" << llendl;
			mValid = FALSE;
			return TRUE; // we've finished
		}
#if !defined(USE_WAV_VFILE)
		mBytesRead = -1;
		mFileHandle = LLLFSThread::sLocal->write(mOutFilename, &mWAVBuffer[0], 0, mWAVBuffer.size(),
							 new WriteResponder(this));
#endif
	}

	if (mFileHandle != LLLFSThread::nullHandle())
	{
		if (mBytesRead >= 0)
		{
			if (mBytesRead == 0)
			{
				llwarns << "Unable to write file in LLVorbisDecodeState::finishDecode" << llendl;
				mValid = FALSE;
				return TRUE; // we've finished
			}
		}
		else
		{
			return FALSE; // not done
		}
	}
	
	mDone = TRUE;

#if defined(USE_WAV_VFILE)
	// write the data.
	LLVFile output(gVFS, mUUID, LLAssetType::AT_SOUND_WAV);
	output.write(&mWAVBuffer[0], mWAVBuffer.size());
#endif
	//llinfos << "Finished decode for " << getUUID() << llendl;

	return TRUE;
}

void LLVorbisDecodeState::flushBadFile()
{
	if (mInFilep)
	{
		llwarns << "Flushing bad vorbis file from VFS for " << mUUID << llendl;
		mInFilep->remove();
	}
}

//////////////////////////////////////////////////////////////////////////////

class LLAudioDecodeMgr::Impl
{
	friend class LLAudioDecodeMgr;
public:
	Impl() {};
	~Impl() {};

	void processQueue(const F32 num_secs = 0.005);

protected:
	LLLinkedQueue<LLUUID> mDecodeQueue;
	LLPointer<LLVorbisDecodeState> mCurrentDecodep;
};


void LLAudioDecodeMgr::Impl::processQueue(const F32 num_secs)
{
	LLUUID uuid;

	LLTimer decode_timer;

	BOOL done = FALSE;
	while (!done)
	{
		if (mCurrentDecodep)
		{
			BOOL res;

			// Decode in a loop until we're done or have run out of time.
			while(!(res = mCurrentDecodep->decodeSection()) && (decode_timer.getElapsedTimeF32() < num_secs))
			{
				// decodeSection does all of the work above
			}

			if (mCurrentDecodep->isDone() && !mCurrentDecodep->isValid())
			{
				// We had an error when decoding, abort.
				llwarns << mCurrentDecodep->getUUID() << " has invalid vorbis data, aborting decode" << llendl;
				mCurrentDecodep->flushBadFile();
				LLAudioData *adp = gAudiop->getAudioData(mCurrentDecodep->getUUID());
				adp->setHasValidData(FALSE);
				mCurrentDecodep = NULL;
				done = TRUE;
			}

			if (!res)
			{
				// We've used up out time slice, bail...
				done = TRUE;
			}
			else if (mCurrentDecodep)
			{
				if (mCurrentDecodep->finishDecode())
				{
					// We finished!
					if (mCurrentDecodep->isValid() && mCurrentDecodep->isDone())
					{
						LLAudioData *adp = gAudiop->getAudioData(mCurrentDecodep->getUUID());
						adp->setHasDecodedData(TRUE);
						adp->setHasValidData(TRUE);

						// At this point, we could see if anyone needs this sound immediately, but
						// I'm not sure that there's a reason to - we need to poll all of the playing
						// sounds anyway.
						//llinfos << "Finished the vorbis decode, now what?" << llendl;
					}
					else
					{
						llinfos << "Vorbis decode failed!!!" << llendl;
					}
					mCurrentDecodep = NULL;
				}
				done = TRUE; // done for now
			}
		}

		if (!done)
		{
			if (!mDecodeQueue.getLength())
			{
				// Nothing else on the queue.
				done = TRUE;
			}
			else
			{
				LLUUID uuid;
				mDecodeQueue.pop(uuid);
				if (gAudiop->hasDecodedFile(uuid))
				{
					// This file has already been decoded, don't decode it again.
					continue;
				}

				lldebugs << "Decoding " << uuid << " from audio queue!" << llendl;

				std::string uuid_str;
				std::string d_path;

				LLTimer timer;
				timer.reset();

				uuid.toString(uuid_str);
				d_path = gDirUtilp->getExpandedFilename(LL_PATH_CACHE,uuid_str) + ".dsf";

				mCurrentDecodep = new LLVorbisDecodeState(uuid, d_path);
				if (!mCurrentDecodep->initDecode())
				{
					mCurrentDecodep = NULL;
				}
			}
		}
	}
}

//////////////////////////////////////////////////////////////////////////////

LLAudioDecodeMgr::LLAudioDecodeMgr()
{
	mImpl = new Impl;
}

LLAudioDecodeMgr::~LLAudioDecodeMgr()
{
	delete mImpl;
}

void LLAudioDecodeMgr::processQueue(const F32 num_secs)
{
	mImpl->processQueue(num_secs);
}

BOOL LLAudioDecodeMgr::addDecodeRequest(const LLUUID &uuid)
{
	if (gAudiop->hasDecodedFile(uuid))
	{
		// Already have a decoded version, don't need to decode it.
		return TRUE;
	}

	if (gAssetStorage->hasLocalAsset(uuid, LLAssetType::AT_SOUND))
	{
		// Just put it on the decode queue.
		mImpl->mDecodeQueue.push(uuid);
		return TRUE;
	}

	return FALSE;
}