ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
Public Member Functions
getid3_tta Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

+ Inheritance diagram for getid3_tta:
+ Collaboration diagram for getid3_tta:

Public Member Functions

 getid3_tta (&$fd, &$ThisFileInfo)
 
 Analyze ()
 
- Public Member Functions inherited from getid3_handler
 __construct (getID3 $getid3, $call_module=null)
 
 Analyze ()
 
 AnalyzeString ($string)
 
 setStringMode ($string)
 
 saveAttachment ($name, $offset, $length, $image_mime=null)
 

Additional Inherited Members

- Protected Member Functions inherited from getid3_handler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
 notice ($text)
 
- Protected Attributes inherited from getid3_handler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

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.tta.php.

Member Function Documentation

◆ Analyze()

getid3_tta::Analyze ( )

Reimplemented from getid3_handler.

Definition at line 21 of file module.audio.tta.php.

21 {
22 $info = &$this->getid3->info;
23
24 $info['fileformat'] = 'tta';
25 $info['audio']['dataformat'] = 'tta';
26 $info['audio']['lossless'] = true;
27 $info['audio']['bitrate_mode'] = 'vbr';
28
29 $this->fseek($info['avdataoffset']);
30 $ttaheader = $this->fread(26);
31
32 $info['tta']['magic'] = substr($ttaheader, 0, 3);
33 $magic = 'TTA';
34 if ($info['tta']['magic'] != $magic) {
35 $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($info['tta']['magic']).'"';
36 unset($info['fileformat']);
37 unset($info['audio']);
38 unset($info['tta']);
39 return false;
40 }
41
42 switch ($ttaheader{3}) {
43 case "\x01": // TTA v1.x
44 case "\x02": // TTA v1.x
45 case "\x03": // TTA v1.x
46 // "It was the demo-version of the TTA encoder. There is no released format with such header. TTA encoder v1 is not supported about a year."
47 $info['tta']['major_version'] = 1;
48 $info['avdataoffset'] += 16;
49
50 $info['tta']['compression_level'] = ord($ttaheader{3});
51 $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2));
52 $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
53 $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 4));
54 $info['tta']['samples_per_channel'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4));
55
56 $info['audio']['encoder_options'] = '-e'.$info['tta']['compression_level'];
57 $info['playtime_seconds'] = $info['tta']['samples_per_channel'] / $info['tta']['sample_rate'];
58 break;
59
60 case '2': // TTA v2.x
61 // "I have hurried to release the TTA 2.0 encoder. Format documentation is removed from our site. This format still in development. Please wait the TTA2 format, encoder v4."
62 $info['tta']['major_version'] = 2;
63 $info['avdataoffset'] += 20;
64
65 $info['tta']['compression_level'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2));
66 $info['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
67 $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2));
68 $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 2));
69 $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4));
70 $info['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 16, 4));
71
72 $info['audio']['encoder_options'] = '-e'.$info['tta']['compression_level'];
73 $info['playtime_seconds'] = $info['tta']['data_length'] / $info['tta']['sample_rate'];
74 break;
75
76 case '1': // TTA v3.x
77 // "This is a first stable release of the TTA format. It will be supported by the encoders v3 or higher."
78 $info['tta']['major_version'] = 3;
79 $info['avdataoffset'] += 26;
80
81 $info['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2)); // getid3_riff::wFormatTagLookup()
82 $info['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
83 $info['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2));
84 $info['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 4));
85 $info['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 14, 4));
86 $info['tta']['crc32_footer'] = substr($ttaheader, 18, 4);
87 $info['tta']['seek_point'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 22, 4));
88
89 $info['playtime_seconds'] = $info['tta']['data_length'] / $info['tta']['sample_rate'];
90 break;
91
92 default:
93 $info['error'][] = 'This version of getID3() ['.$this->getid3->version().'] only knows how to handle TTA v1 and v2 - it may not work correctly with this file which appears to be TTA v'.$ttaheader{3};
94 return false;
95 break;
96 }
97
98 $info['audio']['encoder'] = 'TTA v'.$info['tta']['major_version'];
99 $info['audio']['bits_per_sample'] = $info['tta']['bits_per_sample'];
100 $info['audio']['sample_rate'] = $info['tta']['sample_rate'];
101 $info['audio']['channels'] = $info['tta']['channels'];
102 $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
103
104 return true;
105 }
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_lib\PrintHexBytes
PrintHexBytes($string, $hex=true, $spaces=true, $htmlsafe=true)
Definition: getid3.lib.php:17
$info
$info
Definition: example_052.php:80

References $info, getid3_handler\fread(), getid3_handler\fseek(), getid3_lib\LittleEndian2Int(), and getid3_lib\PrintHexBytes().

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◆ getid3_tta()

getid3_tta::getid3_tta ( &  $fd,
&  $ThisFileInfo 
)

Definition at line 20 of file module.audio.tta.php.

20 {
21
22 $ThisFileInfo['fileformat'] = 'tta';
23 $ThisFileInfo['audio']['dataformat'] = 'tta';
24 $ThisFileInfo['audio']['lossless'] = true;
25 $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
26
27 fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
28 $ttaheader = fread($fd, 26);
29
30 $ThisFileInfo['tta']['magic'] = substr($ttaheader, 0, 3);
31 if ($ThisFileInfo['tta']['magic'] != 'TTA') {
32 $ThisFileInfo['error'][] = 'Expecting "TTA" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$ThisFileInfo['tta']['magic'].'"';
33 unset($ThisFileInfo['fileformat']);
34 unset($ThisFileInfo['audio']);
35 unset($ThisFileInfo['tta']);
36 return false;
37 }
38
39 switch ($ttaheader{3}) {
40 case "\x01": // TTA v1.x
41 case "\x02": // TTA v1.x
42 case "\x03": // TTA v1.x
43 // "It was the demo-version of the TTA encoder. There is no released format with such header. TTA encoder v1 is not supported about a year."
44 $ThisFileInfo['tta']['major_version'] = 1;
45 $ThisFileInfo['avdataoffset'] += 16;
46
47 $ThisFileInfo['tta']['compression_level'] = ord($ttaheader{3});
48 $ThisFileInfo['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2));
49 $ThisFileInfo['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
50 $ThisFileInfo['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 4));
51 $ThisFileInfo['tta']['samples_per_channel'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4));
52
53 $ThisFileInfo['audio']['encoder_options'] = '-e'.$ThisFileInfo['tta']['compression_level'];
54 $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['tta']['samples_per_channel'] / $ThisFileInfo['tta']['sample_rate'];
55 break;
56
57 case '2': // TTA v2.x
58 // "I have hurried to release the TTA 2.0 encoder. Format documentation is removed from our site. This format still in development. Please wait the TTA2 format, encoder v4."
59 $ThisFileInfo['tta']['major_version'] = 2;
60 $ThisFileInfo['avdataoffset'] += 20;
61
62 $ThisFileInfo['tta']['compression_level'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2));
63 $ThisFileInfo['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
64 $ThisFileInfo['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2));
65 $ThisFileInfo['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 2));
66 $ThisFileInfo['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 12, 4));
67 $ThisFileInfo['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 16, 4));
68
69 $ThisFileInfo['audio']['encoder_options'] = '-e'.$ThisFileInfo['tta']['compression_level'];
70 $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['tta']['data_length'] / $ThisFileInfo['tta']['sample_rate'];
71 break;
72
73 case '1': // TTA v3.x
74 // "This is a first stable release of the TTA format. It will be supported by the encoders v3 or higher."
75 $ThisFileInfo['tta']['major_version'] = 3;
76 $ThisFileInfo['avdataoffset'] += 26;
77
78 $ThisFileInfo['tta']['audio_format'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 4, 2)); // getid3_riff::RIFFwFormatTagLookup()
79 $ThisFileInfo['tta']['channels'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 6, 2));
80 $ThisFileInfo['tta']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 8, 2));
81 $ThisFileInfo['tta']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 10, 4));
82 $ThisFileInfo['tta']['data_length'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 14, 4));
83 $ThisFileInfo['tta']['crc32_footer'] = substr($ttaheader, 18, 4);
84 $ThisFileInfo['tta']['seek_point'] = getid3_lib::LittleEndian2Int(substr($ttaheader, 22, 4));
85
86 $ThisFileInfo['playtime_seconds'] = $ThisFileInfo['tta']['data_length'] / $ThisFileInfo['tta']['sample_rate'];
87 break;
88
89 default:
90 $ThisFileInfo['error'][] = 'This version of getID3() only knows how to handle TTA v1 and v2 - it may not work correctly with this file which appears to be TTA v'.$ttaheader{3};
91 return false;
92 break;
93 }
94
95 $ThisFileInfo['audio']['encoder'] = 'TTA v'.$ThisFileInfo['tta']['major_version'];
96 $ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['tta']['bits_per_sample'];
97 $ThisFileInfo['audio']['sample_rate'] = $ThisFileInfo['tta']['sample_rate'];
98 $ThisFileInfo['audio']['channels'] = $ThisFileInfo['tta']['channels'];
99 $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
100
101 return true;
102 }

References getid3_handler\fread(), getid3_handler\fseek(), and getid3_lib\LittleEndian2Int().

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The documentation for this class was generated from the following files: