getid3_au Class Reference
getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...
Collaboration diagram for getid3_au:
Public Member Functions | |
| getid3_au (&$fd, &$ThisFileInfo) | |
| AUdataFormatNameLookup ($id) | |
| AUdataFormatBitsPerSampleLookup ($id) | |
| AUdataFormatUsedBitsPerSampleLookup ($id) | |
Detailed Description
getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //
Definition at line 17 of file module.audio.au.php.
Member Function Documentation
◆ AUdataFormatBitsPerSampleLookup()
| getid3_au::AUdataFormatBitsPerSampleLookup | ( | $id | ) |
Definition at line 104 of file module.audio.au.php.
104 {
105 static $AUdataFormatBitsPerSampleLookup = array(
106 1 => 8,
107 2 => 8,
108 3 => 16,
109 4 => 24,
110 5 => 32,
111 6 => 32,
112 7 => 64,
113
114 11 => 8,
115 12 => 16,
116 13 => 24,
117 14 => 32,
118
119 18 => 16,
120 19 => 16,
121 20 => 16,
122
123 23 => 16,
124
125 25 => 16,
126 26 => 16,
127 27 => 8
128 );
129 return (isset($AUdataFormatBitsPerSampleLookup[$id]) ? $AUdataFormatBitsPerSampleLookup[$id] : false);
130 }
Referenced by getid3_au().
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◆ AUdataFormatNameLookup()
| getid3_au::AUdataFormatNameLookup | ( | $id | ) |
Definition at line 70 of file module.audio.au.php.
70 {
71 static $AUdataFormatNameLookup = array(
72 0 => 'unspecified format',
73 1 => '8-bit mu-law',
74 2 => '8-bit linear',
75 3 => '16-bit linear',
76 4 => '24-bit linear',
77 5 => '32-bit linear',
78 6 => 'floating-point',
79 7 => 'double-precision float',
80 8 => 'fragmented sampled data',
81 9 => 'SUN_FORMAT_NESTED',
82 10 => 'DSP program',
83 11 => '8-bit fixed-point',
84 12 => '16-bit fixed-point',
85 13 => '24-bit fixed-point',
86 14 => '32-bit fixed-point',
87
88 16 => 'non-audio display data',
89 17 => 'SND_FORMAT_MULAW_SQUELCH',
90 18 => '16-bit linear with emphasis',
91 19 => '16-bit linear with compression',
92 20 => '16-bit linear with emphasis + compression',
93 21 => 'Music Kit DSP commands',
94 22 => 'SND_FORMAT_DSP_COMMANDS_SAMPLES',
95 23 => 'CCITT g.721 4-bit ADPCM',
96 24 => 'CCITT g.722 ADPCM',
97 25 => 'CCITT g.723 3-bit ADPCM',
98 26 => 'CCITT g.723 5-bit ADPCM',
99 27 => 'A-Law 8-bit'
100 );
101 return (isset($AUdataFormatNameLookup[$id]) ? $AUdataFormatNameLookup[$id] : false);
102 }
Referenced by getid3_au().
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◆ AUdataFormatUsedBitsPerSampleLookup()
| getid3_au::AUdataFormatUsedBitsPerSampleLookup | ( | $id | ) |
Definition at line 132 of file module.audio.au.php.
132 {
133 static $AUdataFormatUsedBitsPerSampleLookup = array(
134 1 => 8,
135 2 => 8,
136 3 => 16,
137 4 => 24,
138 5 => 32,
139 6 => 32,
140 7 => 64,
141
142 11 => 8,
143 12 => 16,
144 13 => 24,
145 14 => 32,
146
147 18 => 16,
148 19 => 16,
149 20 => 16,
150
151 23 => 4,
152
153 25 => 3,
154 26 => 5,
155 27 => 8,
156 );
157 return (isset($AUdataFormatUsedBitsPerSampleLookup[$id]) ? $AUdataFormatUsedBitsPerSampleLookup[$id] : false);
158 }
Referenced by getid3_au().
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◆ getid3_au()
| getid3_au::getid3_au | ( | & | $fd, |
| & | $ThisFileInfo | ||
| ) |
Definition at line 20 of file module.audio.au.php.
20 {
21
22 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
23 $AUheader = fread($fd, 8);
24
25 if (substr($AUheader, 0, 4) != '.snd') {
26 $ThisFileInfo['error'][] = 'Expecting ".snd" at offset '.$ThisFileInfo['avdataoffset'].', found "'.substr($AUheader, 0, 4).'"';
27 return false;
28 }
29
30 // shortcut
31 $ThisFileInfo['au'] = array();
32 $thisfile_au = &$ThisFileInfo['au'];
33
34 $ThisFileInfo['fileformat'] = 'au';
35 $ThisFileInfo['audio']['dataformat'] = 'au';
36 $ThisFileInfo['audio']['bitrate_mode'] = 'cbr';
37 $thisfile_au['encoding'] = 'ISO-8859-1';
38
40 $AUheader .= fread($fd, $thisfile_au['header_length'] - 8);
41 $ThisFileInfo['avdataoffset'] += $thisfile_au['header_length'];
42
47 $thisfile_au['comments']['comment'][] = trim(substr($AUheader, 24));
48
50 $thisfile_au['used_bits_per_sample'] = $this->AUdataFormatUsedBitsPerSampleLookup($thisfile_au['data_format_id']);
51 if ($thisfile_au['bits_per_sample'] = $this->AUdataFormatBitsPerSampleLookup($thisfile_au['data_format_id'])) {
52 $ThisFileInfo['audio']['bits_per_sample'] = $thisfile_au['bits_per_sample'];
53 } else {
54 unset($thisfile_au['bits_per_sample']);
55 }
56
57 $ThisFileInfo['audio']['sample_rate'] = $thisfile_au['sample_rate'];
58 $ThisFileInfo['audio']['channels'] = $thisfile_au['channels'];
59
60 if (($ThisFileInfo['avdataoffset'] + $thisfile_au['data_size']) > $ThisFileInfo['avdataend']) {
61 $ThisFileInfo['warning'][] = 'Possible truncated file - expecting "'.$thisfile_au['data_size'].'" bytes of audio data, only found '.($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']).' bytes"';
62 }
63
64 $ThisFileInfo['playtime_seconds'] = $thisfile_au['data_size'] / ($thisfile_au['sample_rate'] * $thisfile_au['channels'] * ($thisfile_au['used_bits_per_sample'] / 8));
65 $ThisFileInfo['audio']['bitrate'] = ($thisfile_au['data_size'] * 8) / $ThisFileInfo['playtime_seconds'];
66
67 return true;
68 }
AUdataFormatBitsPerSampleLookup($id)
Definition: module.audio.au.php:104
AUdataFormatUsedBitsPerSampleLookup($id)
Definition: module.audio.au.php:132
BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: getid3.lib.php:234
References AUdataFormatBitsPerSampleLookup(), AUdataFormatNameLookup(), AUdataFormatUsedBitsPerSampleLookup(), and getid3_lib\BigEndian2Int().
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The documentation for this class was generated from the following file:
- Services/MediaObjects/getid3/getid3/module.audio.au.php
