1 | <?php |
---|
2 | ///////////////////////////////////////////////////////////////// |
---|
3 | /// getID3() by James Heinrich <info@getid3.org> // |
---|
4 | // available at http://getid3.sourceforge.net // |
---|
5 | // or http://www.getid3.org // |
---|
6 | ///////////////////////////////////////////////////////////////// |
---|
7 | // See readme.txt for more details // |
---|
8 | ///////////////////////////////////////////////////////////////// |
---|
9 | // // |
---|
10 | // module.audio.monkey.php // |
---|
11 | // module for analyzing Monkey's Audio files // |
---|
12 | // dependencies: NONE // |
---|
13 | // /// |
---|
14 | ///////////////////////////////////////////////////////////////// |
---|
15 | |
---|
16 | |
---|
17 | class getid3_monkey |
---|
18 | { |
---|
19 | |
---|
20 | function getid3_monkey(&$fd, &$ThisFileInfo) { |
---|
21 | // based loosely on code from TMonkey by Jurgen Faul <jfaulØgmx*de> |
---|
22 | // http://jfaul.de/atl or http://j-faul.virtualave.net/atl/atl.html |
---|
23 | |
---|
24 | $ThisFileInfo['fileformat'] = 'mac'; |
---|
25 | $ThisFileInfo['audio']['dataformat'] = 'mac'; |
---|
26 | $ThisFileInfo['audio']['bitrate_mode'] = 'vbr'; |
---|
27 | $ThisFileInfo['audio']['lossless'] = true; |
---|
28 | |
---|
29 | $ThisFileInfo['monkeys_audio']['raw'] = array(); |
---|
30 | $thisfile_monkeysaudio = &$ThisFileInfo['monkeys_audio']; |
---|
31 | $thisfile_monkeysaudio_raw = &$thisfile_monkeysaudio['raw']; |
---|
32 | |
---|
33 | fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET); |
---|
34 | $MACheaderData = fread($fd, 74); |
---|
35 | |
---|
36 | $thisfile_monkeysaudio_raw['magic'] = substr($MACheaderData, 0, 4); |
---|
37 | if ($thisfile_monkeysaudio_raw['magic'] != 'MAC ') { |
---|
38 | $ThisFileInfo['error'][] = 'Expecting "MAC" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$thisfile_monkeysaudio_raw['magic'].'"'; |
---|
39 | unset($ThisFileInfo['fileformat']); |
---|
40 | return false; |
---|
41 | } |
---|
42 | $thisfile_monkeysaudio_raw['nVersion'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 4, 2)); // appears to be uint32 in 3.98+ |
---|
43 | |
---|
44 | if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { |
---|
45 | $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 6, 2)); |
---|
46 | $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 8, 2)); |
---|
47 | $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 10, 2)); |
---|
48 | $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 12, 4)); |
---|
49 | $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 16, 4)); |
---|
50 | $thisfile_monkeysaudio_raw['nWAVTerminatingBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 20, 4)); |
---|
51 | $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 24, 4)); |
---|
52 | $thisfile_monkeysaudio_raw['nFinalFrameSamples'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 28, 4)); |
---|
53 | $thisfile_monkeysaudio_raw['nPeakLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 32, 4)); |
---|
54 | $thisfile_monkeysaudio_raw['nSeekElements'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, 38, 2)); |
---|
55 | $offset = 8; |
---|
56 | } else { |
---|
57 | $offset = 8; |
---|
58 | // APE_DESCRIPTOR |
---|
59 | $thisfile_monkeysaudio_raw['nDescriptorBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
60 | $offset += 4; |
---|
61 | $thisfile_monkeysaudio_raw['nHeaderBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
62 | $offset += 4; |
---|
63 | $thisfile_monkeysaudio_raw['nSeekTableBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
64 | $offset += 4; |
---|
65 | $thisfile_monkeysaudio_raw['nHeaderDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
66 | $offset += 4; |
---|
67 | $thisfile_monkeysaudio_raw['nAPEFrameDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
68 | $offset += 4; |
---|
69 | $thisfile_monkeysaudio_raw['nAPEFrameDataBytesHigh'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
70 | $offset += 4; |
---|
71 | $thisfile_monkeysaudio_raw['nTerminatingDataBytes'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
72 | $offset += 4; |
---|
73 | $thisfile_monkeysaudio_raw['cFileMD5'] = substr($MACheaderData, $offset, 16); |
---|
74 | $offset += 16; |
---|
75 | |
---|
76 | // APE_HEADER |
---|
77 | $thisfile_monkeysaudio_raw['nCompressionLevel'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); |
---|
78 | $offset += 2; |
---|
79 | $thisfile_monkeysaudio_raw['nFormatFlags'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); |
---|
80 | $offset += 2; |
---|
81 | $thisfile_monkeysaudio_raw['nBlocksPerFrame'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
82 | $offset += 4; |
---|
83 | $thisfile_monkeysaudio_raw['nFinalFrameBlocks'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
84 | $offset += 4; |
---|
85 | $thisfile_monkeysaudio_raw['nTotalFrames'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
86 | $offset += 4; |
---|
87 | $thisfile_monkeysaudio_raw['nBitsPerSample'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); |
---|
88 | $offset += 2; |
---|
89 | $thisfile_monkeysaudio_raw['nChannels'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 2)); |
---|
90 | $offset += 2; |
---|
91 | $thisfile_monkeysaudio_raw['nSampleRate'] = getid3_lib::LittleEndian2Int(substr($MACheaderData, $offset, 4)); |
---|
92 | $offset += 4; |
---|
93 | } |
---|
94 | |
---|
95 | $thisfile_monkeysaudio['flags']['8-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0001); |
---|
96 | $thisfile_monkeysaudio['flags']['crc-32'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0002); |
---|
97 | $thisfile_monkeysaudio['flags']['peak_level'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0004); |
---|
98 | $thisfile_monkeysaudio['flags']['24-bit'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0008); |
---|
99 | $thisfile_monkeysaudio['flags']['seek_elements'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0010); |
---|
100 | $thisfile_monkeysaudio['flags']['no_wav_header'] = (bool) ($thisfile_monkeysaudio_raw['nFormatFlags'] & 0x0020); |
---|
101 | $thisfile_monkeysaudio['version'] = $thisfile_monkeysaudio_raw['nVersion'] / 1000; |
---|
102 | $thisfile_monkeysaudio['compression'] = $this->MonkeyCompressionLevelNameLookup($thisfile_monkeysaudio_raw['nCompressionLevel']); |
---|
103 | if ($thisfile_monkeysaudio_raw['nVersion'] < 3980) { |
---|
104 | $thisfile_monkeysaudio['samples_per_frame'] = $this->MonkeySamplesPerFrame($thisfile_monkeysaudio_raw['nVersion'], $thisfile_monkeysaudio_raw['nCompressionLevel']); |
---|
105 | } |
---|
106 | $thisfile_monkeysaudio['bits_per_sample'] = ($thisfile_monkeysaudio['flags']['24-bit'] ? 24 : ($thisfile_monkeysaudio['flags']['8-bit'] ? 8 : 16)); |
---|
107 | $thisfile_monkeysaudio['channels'] = $thisfile_monkeysaudio_raw['nChannels']; |
---|
108 | $ThisFileInfo['audio']['channels'] = $thisfile_monkeysaudio['channels']; |
---|
109 | $thisfile_monkeysaudio['sample_rate'] = $thisfile_monkeysaudio_raw['nSampleRate']; |
---|
110 | if ($thisfile_monkeysaudio['sample_rate'] == 0) { |
---|
111 | $ThisFileInfo['error'][] = 'Corrupt MAC file: frequency == zero'; |
---|
112 | return false; |
---|
113 | } |
---|
114 | $ThisFileInfo['audio']['sample_rate'] = $thisfile_monkeysaudio['sample_rate']; |
---|
115 | if ($thisfile_monkeysaudio['flags']['peak_level']) { |
---|
116 | $thisfile_monkeysaudio['peak_level'] = $thisfile_monkeysaudio_raw['nPeakLevel']; |
---|
117 | $thisfile_monkeysaudio['peak_ratio'] = $thisfile_monkeysaudio['peak_level'] / pow(2, $thisfile_monkeysaudio['bits_per_sample'] - 1); |
---|
118 | } |
---|
119 | if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { |
---|
120 | $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio_raw['nBlocksPerFrame']) + $thisfile_monkeysaudio_raw['nFinalFrameBlocks']; |
---|
121 | } else { |
---|
122 | $thisfile_monkeysaudio['samples'] = (($thisfile_monkeysaudio_raw['nTotalFrames'] - 1) * $thisfile_monkeysaudio['samples_per_frame']) + $thisfile_monkeysaudio_raw['nFinalFrameSamples']; |
---|
123 | } |
---|
124 | $thisfile_monkeysaudio['playtime'] = $thisfile_monkeysaudio['samples'] / $thisfile_monkeysaudio['sample_rate']; |
---|
125 | if ($thisfile_monkeysaudio['playtime'] == 0) { |
---|
126 | $ThisFileInfo['error'][] = 'Corrupt MAC file: playtime == zero'; |
---|
127 | return false; |
---|
128 | } |
---|
129 | $ThisFileInfo['playtime_seconds'] = $thisfile_monkeysaudio['playtime']; |
---|
130 | $thisfile_monkeysaudio['compressed_size'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']; |
---|
131 | $thisfile_monkeysaudio['uncompressed_size'] = $thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * ($thisfile_monkeysaudio['bits_per_sample'] / 8); |
---|
132 | if ($thisfile_monkeysaudio['uncompressed_size'] == 0) { |
---|
133 | $ThisFileInfo['error'][] = 'Corrupt MAC file: uncompressed_size == zero'; |
---|
134 | return false; |
---|
135 | } |
---|
136 | $thisfile_monkeysaudio['compression_ratio'] = $thisfile_monkeysaudio['compressed_size'] / ($thisfile_monkeysaudio['uncompressed_size'] + $thisfile_monkeysaudio_raw['nHeaderDataBytes']); |
---|
137 | $thisfile_monkeysaudio['bitrate'] = (($thisfile_monkeysaudio['samples'] * $thisfile_monkeysaudio['channels'] * $thisfile_monkeysaudio['bits_per_sample']) / $thisfile_monkeysaudio['playtime']) * $thisfile_monkeysaudio['compression_ratio']; |
---|
138 | $ThisFileInfo['audio']['bitrate'] = $thisfile_monkeysaudio['bitrate']; |
---|
139 | |
---|
140 | // add size of MAC header to avdataoffset |
---|
141 | if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { |
---|
142 | $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nDescriptorBytes']; |
---|
143 | $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderBytes']; |
---|
144 | $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nSeekTableBytes']; |
---|
145 | $ThisFileInfo['avdataoffset'] += $thisfile_monkeysaudio_raw['nHeaderDataBytes']; |
---|
146 | |
---|
147 | $ThisFileInfo['avdataend'] -= $thisfile_monkeysaudio_raw['nTerminatingDataBytes']; |
---|
148 | } else { |
---|
149 | $ThisFileInfo['avdataoffset'] += $offset; |
---|
150 | } |
---|
151 | |
---|
152 | if ($thisfile_monkeysaudio_raw['nVersion'] >= 3980) { |
---|
153 | if ($thisfile_monkeysaudio_raw['cFileMD5'] === str_repeat("\x00", 16)) { |
---|
154 | //$ThisFileInfo['warning'][] = 'cFileMD5 is null'; |
---|
155 | } else { |
---|
156 | $ThisFileInfo['md5_data_source'] = ''; |
---|
157 | $md5 = $thisfile_monkeysaudio_raw['cFileMD5']; |
---|
158 | for ($i = 0; $i < strlen($md5); $i++) { |
---|
159 | $ThisFileInfo['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); |
---|
160 | } |
---|
161 | if (!preg_match('/^[0-9a-f]{32}$/', $ThisFileInfo['md5_data_source'])) { |
---|
162 | unset($ThisFileInfo['md5_data_source']); |
---|
163 | } |
---|
164 | } |
---|
165 | } |
---|
166 | |
---|
167 | |
---|
168 | |
---|
169 | $ThisFileInfo['audio']['bits_per_sample'] = $thisfile_monkeysaudio['bits_per_sample']; |
---|
170 | $ThisFileInfo['audio']['encoder'] = 'MAC v'.number_format($thisfile_monkeysaudio['version'], 2); |
---|
171 | $ThisFileInfo['audio']['encoder_options'] = ucfirst($thisfile_monkeysaudio['compression']).' compression'; |
---|
172 | |
---|
173 | return true; |
---|
174 | } |
---|
175 | |
---|
176 | function MonkeyCompressionLevelNameLookup($compressionlevel) { |
---|
177 | static $MonkeyCompressionLevelNameLookup = array( |
---|
178 | 0 => 'unknown', |
---|
179 | 1000 => 'fast', |
---|
180 | 2000 => 'normal', |
---|
181 | 3000 => 'high', |
---|
182 | 4000 => 'extra-high', |
---|
183 | 5000 => 'insane' |
---|
184 | ); |
---|
185 | return (isset($MonkeyCompressionLevelNameLookup[$compressionlevel]) ? $MonkeyCompressionLevelNameLookup[$compressionlevel] : 'invalid'); |
---|
186 | } |
---|
187 | |
---|
188 | function MonkeySamplesPerFrame($versionid, $compressionlevel) { |
---|
189 | if ($versionid >= 3950) { |
---|
190 | return 73728 * 4; |
---|
191 | } elseif ($versionid >= 3900) { |
---|
192 | return 73728; |
---|
193 | } elseif (($versionid >= 3800) && ($compressionlevel == 4000)) { |
---|
194 | return 73728; |
---|
195 | } else { |
---|
196 | return 9216; |
---|
197 | } |
---|
198 | } |
---|
199 | |
---|
200 | } |
---|
201 | |
---|
202 | ?> |
---|