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-rw-r--r--getid3/module.audio.shorten.php180
1 files changed, 180 insertions, 0 deletions
diff --git a/getid3/module.audio.shorten.php b/getid3/module.audio.shorten.php
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+++ b/getid3/module.audio.shorten.php
@@ -0,0 +1,180 @@
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.audio.shorten.php //
+// module for analyzing Shorten Audio files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_shorten
+{
+
+ function getid3_shorten(&$fd, &$ThisFileInfo) {
+
+ fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+
+ $ShortenHeader = fread($fd, 8);
+ if (substr($ShortenHeader, 0, 4) != 'ajkg') {
+ $ThisFileInfo['error'][] = 'Expecting "ajkg" at offset '.$ThisFileInfo['avdataoffset'].', found "'.substr($ShortenHeader, 0, 4).'"';
+ return false;
+ }
+ $ThisFileInfo['fileformat'] = 'shn';
+ $ThisFileInfo['audio']['dataformat'] = 'shn';
+ $ThisFileInfo['audio']['lossless'] = true;
+ $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
+
+ $ThisFileInfo['shn']['version'] = getid3_lib::LittleEndian2Int(substr($ShortenHeader, 4, 1));
+
+ fseek($fd, $ThisFileInfo['avdataend'] - 12, SEEK_SET);
+ $SeekTableSignatureTest = fread($fd, 12);
+ $ThisFileInfo['shn']['seektable']['present'] = (bool) (substr($SeekTableSignatureTest, 4, 8) == 'SHNAMPSK');
+ if ($ThisFileInfo['shn']['seektable']['present']) {
+ $ThisFileInfo['shn']['seektable']['length'] = getid3_lib::LittleEndian2Int(substr($SeekTableSignatureTest, 0, 4));
+ $ThisFileInfo['shn']['seektable']['offset'] = $ThisFileInfo['avdataend'] - $ThisFileInfo['shn']['seektable']['length'];
+ fseek($fd, $ThisFileInfo['shn']['seektable']['offset'], SEEK_SET);
+ $SeekTableMagic = fread($fd, 4);
+ if ($SeekTableMagic != 'SEEK') {
+
+ $ThisFileInfo['error'][] = 'Expecting "SEEK" at offset '.$ThisFileInfo['shn']['seektable']['offset'].', found "'.$SeekTableMagic.'"';
+ return false;
+
+ } else {
+
+ // typedef struct tag_TSeekEntry
+ // {
+ // unsigned long SampleNumber;
+ // unsigned long SHNFileByteOffset;
+ // unsigned long SHNLastBufferReadPosition;
+ // unsigned short SHNByteGet;
+ // unsigned short SHNBufferOffset;
+ // unsigned short SHNFileBitOffset;
+ // unsigned long SHNGBuffer;
+ // unsigned short SHNBitShift;
+ // long CBuf0[3];
+ // long CBuf1[3];
+ // long Offset0[4];
+ // long Offset1[4];
+ // }TSeekEntry;
+
+ $SeekTableData = fread($fd, $ThisFileInfo['shn']['seektable']['length'] - 16);
+ $ThisFileInfo['shn']['seektable']['entry_count'] = floor(strlen($SeekTableData) / 80);
+ //$ThisFileInfo['shn']['seektable']['entries'] = array();
+ //$SeekTableOffset = 0;
+ //for ($i = 0; $i < $ThisFileInfo['shn']['seektable']['entry_count']; $i++) {
+ // $SeekTableEntry['sample_number'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // $SeekTableEntry['shn_file_byte_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // $SeekTableEntry['shn_last_buffer_read_position'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // $SeekTableEntry['shn_byte_get'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
+ // $SeekTableOffset += 2;
+ // $SeekTableEntry['shn_buffer_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
+ // $SeekTableOffset += 2;
+ // $SeekTableEntry['shn_file_bit_offset'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
+ // $SeekTableOffset += 2;
+ // $SeekTableEntry['shn_gbuffer'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // $SeekTableEntry['shn_bit_shift'] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 2));
+ // $SeekTableOffset += 2;
+ // for ($j = 0; $j < 3; $j++) {
+ // $SeekTableEntry['cbuf0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // }
+ // for ($j = 0; $j < 3; $j++) {
+ // $SeekTableEntry['cbuf1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // }
+ // for ($j = 0; $j < 4; $j++) {
+ // $SeekTableEntry['offset0'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // }
+ // for ($j = 0; $j < 4; $j++) {
+ // $SeekTableEntry['offset1'][$j] = getid3_lib::LittleEndian2Int(substr($SeekTableData, $SeekTableOffset, 4));
+ // $SeekTableOffset += 4;
+ // }
+ //
+ // $ThisFileInfo['shn']['seektable']['entries'][] = $SeekTableEntry;
+ //}
+
+ }
+
+ }
+
+ if ((bool) ini_get('safe_mode')) {
+ $ThisFileInfo['error'][] = 'PHP running in Safe Mode - backtick operator not available, cannot run shntool to analyze Shorten files';
+ return false;
+ }
+
+ if (GETID3_OS_ISWINDOWS) {
+
+ $RequiredFiles = array('shorten.exe', 'cygwin1.dll', 'head.exe');
+ foreach ($RequiredFiles as $required_file) {
+ if (!is_readable(GETID3_HELPERAPPSDIR.$required_file)) {
+ $ThisFileInfo['error'][] = GETID3_HELPERAPPSDIR.$required_file.' does not exist';
+ return false;
+ }
+ }
+ $commandline = GETID3_HELPERAPPSDIR.'shorten.exe -x "'.$ThisFileInfo['filenamepath'].'" - | '.GETID3_HELPERAPPSDIR.'head.exe -c 64';
+ $commandline = str_replace('/', '\\', $commandline);
+
+ } else {
+
+ static $shorten_present;
+ if (!isset($shorten_present)) {
+ $shorten_present = file_exists('/usr/local/bin/shorten') || `which shorten`;
+ }
+ if (!$shorten_present) {
+ $ThisFileInfo['error'][] = 'shorten binary was not found in path or /usr/local/bin';
+ return false;
+ }
+ $commandline = (file_exists('/usr/local/bin/shorten') ? '/usr/local/bin/' : '' ) . 'shorten -x '.escapeshellarg($ThisFileInfo['filenamepath']).' - | head -c 64';
+
+ }
+
+ $output = `$commandline`;
+
+ if (!empty($output) && (substr($output, 12, 4) == 'fmt ')) {
+
+ getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
+
+ $fmt_size = getid3_lib::LittleEndian2Int(substr($output, 16, 4));
+ $DecodedWAVFORMATEX = getid3_riff::RIFFparseWAVEFORMATex(substr($output, 20, $fmt_size));
+ $ThisFileInfo['audio']['channels'] = $DecodedWAVFORMATEX['channels'];
+ $ThisFileInfo['audio']['bits_per_sample'] = $DecodedWAVFORMATEX['bits_per_sample'];
+ $ThisFileInfo['audio']['sample_rate'] = $DecodedWAVFORMATEX['sample_rate'];
+
+ if (substr($output, 20 + $fmt_size, 4) == 'data') {
+
+ $ThisFileInfo['playtime_seconds'] = getid3_lib::LittleEndian2Int(substr($output, 20 + 4 + $fmt_size, 4)) / $DecodedWAVFORMATEX['raw']['nAvgBytesPerSec'];
+
+ } else {
+
+ $ThisFileInfo['error'][] = 'shorten failed to decode DATA chunk to expected location, cannot determine playtime';
+ return false;
+
+ }
+
+ $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) / $ThisFileInfo['playtime_seconds']) * 8;
+
+ } else {
+
+ $ThisFileInfo['error'][] = 'shorten failed to decode file to WAV for parsing';
+ return false;
+
+ }
+
+ return true;
+ }
+
+}
+
+?> \ No newline at end of file
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