php-getid3 1.9.8-3 / usr / share / php / getid3 / module.audio.wavpack.php

This file is indexed.

/usr/share/php/getid3/module.audio.wavpack.php is in php-getid3 1.9.8-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below. 

  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
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.wavpack.php                                    //
// module for analyzing WavPack v4.0+ Audio files              //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_wavpack extends getid3_handler
{

	public function Analyze() {
		$info = &$this->getid3->info;

		$this->fseek($info['avdataoffset']);

		while (true) {

			$wavpackheader = $this->fread(32);

			if ($this->ftell() >= $info['avdataend']) {
				break;
			} elseif (feof($this->getid3->fp)) {
				break;
			} elseif (
				isset($info['wavpack']['blockheader']['total_samples']) &&
				isset($info['wavpack']['blockheader']['block_samples']) &&
				($info['wavpack']['blockheader']['total_samples'] > 0) &&
				($info['wavpack']['blockheader']['block_samples'] > 0) &&
				(!isset($info['wavpack']['riff_trailer_size']) || ($info['wavpack']['riff_trailer_size'] <= 0)) &&
				((isset($info['wavpack']['config_flags']['md5_checksum']) && ($info['wavpack']['config_flags']['md5_checksum'] === false)) || !empty($info['md5_data_source']))) {
					break;
			}

			$blockheader_offset = $this->ftell() - 32;
			$blockheader_magic  =                              substr($wavpackheader,  0,  4);
			$blockheader_size   = getid3_lib::LittleEndian2Int(substr($wavpackheader,  4,  4));

			$magic = 'wvpk';
			if ($blockheader_magic != $magic) {
				$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$blockheader_offset.', found "'.getid3_lib::PrintHexBytes($blockheader_magic).'"';
				switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
					case 'wavpack':
					case 'wvc':
						break;
					default:
						unset($info['fileformat']);
						unset($info['audio']);
						unset($info['wavpack']);
						break;
				}
				return false;
			}

			if (empty($info['wavpack']['blockheader']['block_samples']) ||
				empty($info['wavpack']['blockheader']['total_samples']) ||
				($info['wavpack']['blockheader']['block_samples'] <= 0) ||
				($info['wavpack']['blockheader']['total_samples'] <= 0)) {
				// Also, it is possible that the first block might not have
				// any samples (block_samples == 0) and in this case you should skip blocks
				// until you find one with samples because the other information (like
				// total_samples) are not guaranteed to be correct until (block_samples > 0)

				// Finally, I have defined a format for files in which the length is not known
				// (for example when raw files are created using pipes). In these cases
				// total_samples will be -1 and you must seek to the final block to determine
				// the total number of samples.


				$info['audio']['dataformat']   = 'wavpack';
				$info['fileformat']            = 'wavpack';
				$info['audio']['lossless']     = true;
				$info['audio']['bitrate_mode'] = 'vbr';

				$info['wavpack']['blockheader']['offset'] = $blockheader_offset;
				$info['wavpack']['blockheader']['magic']  = $blockheader_magic;
				$info['wavpack']['blockheader']['size']   = $blockheader_size;

				if ($info['wavpack']['blockheader']['size'] >= 0x100000) {
					$info['error'][] = 'Expecting WavPack block size less than "0x100000", found "'.$info['wavpack']['blockheader']['size'].'" at offset '.$info['wavpack']['blockheader']['offset'];
					switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
						case 'wavpack':
						case 'wvc':
							break;
						default:
							unset($info['fileformat']);
							unset($info['audio']);
							unset($info['wavpack']);
							break;
					}
					return false;
				}

				$info['wavpack']['blockheader']['minor_version'] = ord($wavpackheader{8});
				$info['wavpack']['blockheader']['major_version'] = ord($wavpackheader{9});

				if (($info['wavpack']['blockheader']['major_version'] != 4) ||
					(($info['wavpack']['blockheader']['minor_version'] < 4) &&
					($info['wavpack']['blockheader']['minor_version'] > 16))) {
						$info['error'][] = 'Expecting WavPack version between "4.2" and "4.16", found version "'.$info['wavpack']['blockheader']['major_version'].'.'.$info['wavpack']['blockheader']['minor_version'].'" at offset '.$info['wavpack']['blockheader']['offset'];
						switch (isset($info['audio']['dataformat']) ? $info['audio']['dataformat'] : '') {
							case 'wavpack':
							case 'wvc':
								break;
							default:
								unset($info['fileformat']);
								unset($info['audio']);
								unset($info['wavpack']);
								break;
						}
						return false;
				}

				$info['wavpack']['blockheader']['track_number']  = ord($wavpackheader{10}); // unused
				$info['wavpack']['blockheader']['index_number']  = ord($wavpackheader{11}); // unused
				$info['wavpack']['blockheader']['total_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 12,  4));
				$info['wavpack']['blockheader']['block_index']   = getid3_lib::LittleEndian2Int(substr($wavpackheader, 16,  4));
				$info['wavpack']['blockheader']['block_samples'] = getid3_lib::LittleEndian2Int(substr($wavpackheader, 20,  4));
				$info['wavpack']['blockheader']['flags_raw']     = getid3_lib::LittleEndian2Int(substr($wavpackheader, 24,  4));
				$info['wavpack']['blockheader']['crc']           = getid3_lib::LittleEndian2Int(substr($wavpackheader, 28,  4));

				$info['wavpack']['blockheader']['flags']['bytes_per_sample']     =    1 + ($info['wavpack']['blockheader']['flags_raw'] & 0x00000003);
				$info['wavpack']['blockheader']['flags']['mono']                 = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000004);
				$info['wavpack']['blockheader']['flags']['hybrid']               = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000008);
				$info['wavpack']['blockheader']['flags']['joint_stereo']         = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000010);
				$info['wavpack']['blockheader']['flags']['cross_decorrelation']  = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000020);
				$info['wavpack']['blockheader']['flags']['hybrid_noiseshape']    = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000040);
				$info['wavpack']['blockheader']['flags']['ieee_32bit_float']     = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000080);
				$info['wavpack']['blockheader']['flags']['int_32bit']            = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000100);
				$info['wavpack']['blockheader']['flags']['hybrid_bitrate_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000200);
				$info['wavpack']['blockheader']['flags']['hybrid_balance_noise'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000400);
				$info['wavpack']['blockheader']['flags']['multichannel_initial'] = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00000800);
				$info['wavpack']['blockheader']['flags']['multichannel_final']   = (bool) ($info['wavpack']['blockheader']['flags_raw'] & 0x00001000);

				$info['audio']['lossless'] = !$info['wavpack']['blockheader']['flags']['hybrid'];
			}

			while (!feof($this->getid3->fp) && ($this->ftell() < ($blockheader_offset + $blockheader_size + 8))) {

				$metablock = array('offset'=>$this->ftell());
				$metablockheader = $this->fread(2);
				if (feof($this->getid3->fp)) {
					break;
				}
				$metablock['id'] = ord($metablockheader{0});
				$metablock['function_id'] = ($metablock['id'] & 0x3F);
				$metablock['function_name'] = $this->WavPackMetablockNameLookup($metablock['function_id']);

				// The 0x20 bit in the id of the meta subblocks (which is defined as
				// ID_OPTIONAL_DATA) is a permanent part of the id. The idea is that
				// if a decoder encounters an id that it does not know about, it uses
				// that "ID_OPTIONAL_DATA" flag to determine what to do. If it is set
				// then the decoder simply ignores the metadata, but if it is zero
				// then the decoder should quit because it means that an understanding
				// of the metadata is required to correctly decode the audio.
				$metablock['non_decoder'] = (bool) ($metablock['id'] & 0x20);

				$metablock['padded_data'] = (bool) ($metablock['id'] & 0x40);
				$metablock['large_block'] = (bool) ($metablock['id'] & 0x80);
				if ($metablock['large_block']) {
					$metablockheader .= $this->fread(2);
				}
				$metablock['size'] = getid3_lib::LittleEndian2Int(substr($metablockheader, 1)) * 2; // size is stored in words
				$metablock['data'] = null;

				if ($metablock['size'] > 0) {

					switch ($metablock['function_id']) {
						case 0x21: // ID_RIFF_HEADER
						case 0x22: // ID_RIFF_TRAILER
						case 0x23: // ID_REPLAY_GAIN
						case 0x24: // ID_CUESHEET
						case 0x25: // ID_CONFIG_BLOCK
						case 0x26: // ID_MD5_CHECKSUM
							$metablock['data'] = $this->fread($metablock['size']);

							if ($metablock['padded_data']) {
								// padded to the nearest even byte
								$metablock['size']--;
								$metablock['data'] = substr($metablock['data'], 0, -1);
							}
							break;

						case 0x00: // ID_DUMMY
						case 0x01: // ID_ENCODER_INFO
						case 0x02: // ID_DECORR_TERMS
						case 0x03: // ID_DECORR_WEIGHTS
						case 0x04: // ID_DECORR_SAMPLES
						case 0x05: // ID_ENTROPY_VARS
						case 0x06: // ID_HYBRID_PROFILE
						case 0x07: // ID_SHAPING_WEIGHTS
						case 0x08: // ID_FLOAT_INFO
						case 0x09: // ID_INT32_INFO
						case 0x0A: // ID_WV_BITSTREAM
						case 0x0B: // ID_WVC_BITSTREAM
						case 0x0C: // ID_WVX_BITSTREAM
						case 0x0D: // ID_CHANNEL_INFO
							$this->fseek($metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size']);
							break;

						default:
							$info['warning'][] = 'Unexpected metablock type "0x'.str_pad(dechex($metablock['function_id']), 2, '0', STR_PAD_LEFT).'" at offset '.$metablock['offset'];
							$this->fseek($metablock['offset'] + ($metablock['large_block'] ? 4 : 2) + $metablock['size']);
							break;
					}

					switch ($metablock['function_id']) {
						case 0x21: // ID_RIFF_HEADER
							getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
							$original_wav_filesize = getid3_lib::LittleEndian2Int(substr($metablock['data'], 4, 4));

							$getid3_temp = new getID3();
							$getid3_temp->openfile($this->getid3->filename);
							$getid3_riff = new getid3_riff($getid3_temp);
							$getid3_riff->ParseRIFFdata($metablock['data']);
							$metablock['riff']            = $getid3_temp->info['riff'];
							$info['audio']['sample_rate'] = $getid3_temp->info['riff']['raw']['fmt ']['nSamplesPerSec'];
							unset($getid3_riff, $getid3_temp);

							$metablock['riff']['original_filesize'] = $original_wav_filesize;
							$info['wavpack']['riff_trailer_size'] = $original_wav_filesize - $metablock['riff']['WAVE']['data'][0]['size'] - $metablock['riff']['header_size'];
							$info['playtime_seconds'] = $info['wavpack']['blockheader']['total_samples'] / $info['audio']['sample_rate'];

							// Safe RIFF header in case there's a RIFF footer later
							$metablockRIFFheader = $metablock['data'];
							break;


						case 0x22: // ID_RIFF_TRAILER
							$metablockRIFFfooter = $metablockRIFFheader.$metablock['data'];
							getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);

							$startoffset = $metablock['offset'] + ($metablock['large_block'] ? 4 : 2);
							$getid3_temp = new getID3();
							$getid3_temp->openfile($this->getid3->filename);
							$getid3_temp->info['avdataend']  = $info['avdataend'];
							//$getid3_temp->info['fileformat'] = 'riff';
							$getid3_riff = new getid3_riff($getid3_temp);
							$metablock['riff'] = $getid3_riff->ParseRIFF($startoffset, $startoffset + $metablock['size']);

							if (!empty($metablock['riff']['INFO'])) {
								getid3_riff::parseComments($metablock['riff']['INFO'], $metablock['comments']);
								$info['tags']['riff'] = $metablock['comments'];
							}
							unset($getid3_temp, $getid3_riff);
							break;


						case 0x23: // ID_REPLAY_GAIN
							$info['warning'][] = 'WavPack "Replay Gain" contents not yet handled by getID3() in metablock at offset '.$metablock['offset'];
							break;


						case 0x24: // ID_CUESHEET
							$info['warning'][] = 'WavPack "Cuesheet" contents not yet handled by getID3() in metablock at offset '.$metablock['offset'];
							break;


						case 0x25: // ID_CONFIG_BLOCK
							$metablock['flags_raw'] = getid3_lib::LittleEndian2Int(substr($metablock['data'], 0, 3));

							$metablock['flags']['adobe_mode']     = (bool) ($metablock['flags_raw'] & 0x000001); // "adobe" mode for 32-bit floats
							$metablock['flags']['fast_flag']      = (bool) ($metablock['flags_raw'] & 0x000002); // fast mode
							$metablock['flags']['very_fast_flag'] = (bool) ($metablock['flags_raw'] & 0x000004); // double fast
							$metablock['flags']['high_flag']      = (bool) ($metablock['flags_raw'] & 0x000008); // high quality mode
							$metablock['flags']['very_high_flag'] = (bool) ($metablock['flags_raw'] & 0x000010); // double high (not used yet)
							$metablock['flags']['bitrate_kbps']   = (bool) ($metablock['flags_raw'] & 0x000020); // bitrate is kbps, not bits / sample
							$metablock['flags']['auto_shaping']   = (bool) ($metablock['flags_raw'] & 0x000040); // automatic noise shaping
							$metablock['flags']['shape_override'] = (bool) ($metablock['flags_raw'] & 0x000080); // shaping mode specified
							$metablock['flags']['joint_override'] = (bool) ($metablock['flags_raw'] & 0x000100); // joint-stereo mode specified
							$metablock['flags']['copy_time']      = (bool) ($metablock['flags_raw'] & 0x000200); // copy file-time from source
							$metablock['flags']['create_exe']     = (bool) ($metablock['flags_raw'] & 0x000400); // create executable
							$metablock['flags']['create_wvc']     = (bool) ($metablock['flags_raw'] & 0x000800); // create correction file
							$metablock['flags']['optimize_wvc']   = (bool) ($metablock['flags_raw'] & 0x001000); // maximize bybrid compression
							$metablock['flags']['quality_mode']   = (bool) ($metablock['flags_raw'] & 0x002000); // psychoacoustic quality mode
							$metablock['flags']['raw_flag']       = (bool) ($metablock['flags_raw'] & 0x004000); // raw mode (not implemented yet)
							$metablock['flags']['calc_noise']     = (bool) ($metablock['flags_raw'] & 0x008000); // calc noise in hybrid mode
							$metablock['flags']['lossy_mode']     = (bool) ($metablock['flags_raw'] & 0x010000); // obsolete (for information)
							$metablock['flags']['extra_mode']     = (bool) ($metablock['flags_raw'] & 0x020000); // extra processing mode
							$metablock['flags']['skip_wvx']       = (bool) ($metablock['flags_raw'] & 0x040000); // no wvx stream w/ floats & big ints
							$metablock['flags']['md5_checksum']   = (bool) ($metablock['flags_raw'] & 0x080000); // compute & store MD5 signature
							$metablock['flags']['quiet_mode']     = (bool) ($metablock['flags_raw'] & 0x100000); // don't report progress %

							$info['wavpack']['config_flags'] = $metablock['flags'];


							$info['audio']['encoder_options'] = '';
							if ($info['wavpack']['blockheader']['flags']['hybrid']) {
								$info['audio']['encoder_options'] .= ' -b???';
							}
							$info['audio']['encoder_options'] .= ($metablock['flags']['adobe_mode']     ? ' -a' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['optimize_wvc']   ? ' -cc' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['create_exe']     ? ' -e' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['fast_flag']      ? ' -f' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['joint_override'] ? ' -j?' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['high_flag']      ? ' -h' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['md5_checksum']   ? ' -m' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['calc_noise']     ? ' -n' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['shape_override'] ? ' -s?' : '');
							$info['audio']['encoder_options'] .= ($metablock['flags']['extra_mode']     ? ' -x?' : '');
							if (!empty($info['audio']['encoder_options'])) {
								$info['audio']['encoder_options'] = trim($info['audio']['encoder_options']);
							} elseif (isset($info['audio']['encoder_options'])) {
								unset($info['audio']['encoder_options']);
							}
							break;


						case 0x26: // ID_MD5_CHECKSUM
							if (strlen($metablock['data']) == 16) {
								$info['md5_data_source'] = strtolower(getid3_lib::PrintHexBytes($metablock['data'], true, false, false));
							} else {
								$info['warning'][] = 'Expecting 16 bytes of WavPack "MD5 Checksum" in metablock at offset '.$metablock['offset'].', but found '.strlen($metablock['data']).' bytes';
							}
							break;


						case 0x00: // ID_DUMMY
						case 0x01: // ID_ENCODER_INFO
						case 0x02: // ID_DECORR_TERMS
						case 0x03: // ID_DECORR_WEIGHTS
						case 0x04: // ID_DECORR_SAMPLES
						case 0x05: // ID_ENTROPY_VARS
						case 0x06: // ID_HYBRID_PROFILE
						case 0x07: // ID_SHAPING_WEIGHTS
						case 0x08: // ID_FLOAT_INFO
						case 0x09: // ID_INT32_INFO
						case 0x0A: // ID_WV_BITSTREAM
						case 0x0B: // ID_WVC_BITSTREAM
						case 0x0C: // ID_WVX_BITSTREAM
						case 0x0D: // ID_CHANNEL_INFO
							unset($metablock);
							break;
					}

				}
				if (!empty($metablock)) {
					$info['wavpack']['metablocks'][] = $metablock;
				}

			}

		}

		$info['audio']['encoder']         = 'WavPack v'.$info['wavpack']['blockheader']['major_version'].'.'.str_pad($info['wavpack']['blockheader']['minor_version'], 2, '0', STR_PAD_LEFT);
		$info['audio']['bits_per_sample'] = $info['wavpack']['blockheader']['flags']['bytes_per_sample'] * 8;
		$info['audio']['channels']        = ($info['wavpack']['blockheader']['flags']['mono'] ? 1 : 2);

		if (!empty($info['playtime_seconds'])) {

			$info['audio']['bitrate']     = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];

		} else {

			$info['audio']['dataformat']  = 'wvc';

		}

		return true;
	}


	public function WavPackMetablockNameLookup(&$id) {
		static $WavPackMetablockNameLookup = array(
			0x00 => 'Dummy',
			0x01 => 'Encoder Info',
			0x02 => 'Decorrelation Terms',
			0x03 => 'Decorrelation Weights',
			0x04 => 'Decorrelation Samples',
			0x05 => 'Entropy Variables',
			0x06 => 'Hybrid Profile',
			0x07 => 'Shaping Weights',
			0x08 => 'Float Info',
			0x09 => 'Int32 Info',
			0x0A => 'WV Bitstream',
			0x0B => 'WVC Bitstream',
			0x0C => 'WVX Bitstream',
			0x0D => 'Channel Info',
			0x21 => 'RIFF header',
			0x22 => 'RIFF trailer',
			0x23 => 'Replay Gain',
			0x24 => 'Cuesheet',
			0x25 => 'Config Block',
			0x26 => 'MD5 Checksum',
		);
		return (isset($WavPackMetablockNameLookup[$id]) ? $WavPackMetablockNameLookup[$id] : '');
	}

}

APT Browse - Built by Thomas Orozco.