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1 files changed, 296 insertions, 0 deletions
diff --git a/modules/id3/getid3/module.audio.mpc.php b/modules/id3/getid3/module.audio.mpc.php
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+++ b/modules/id3/getid3/module.audio.mpc.php
@@ -0,0 +1,296 @@
+<?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.mpc.php //
+// module for analyzing Musepack/MPEG+ Audio files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_mpc
+{
+
+ function getid3_mpc(&$fd, &$ThisFileInfo) {
+ // http://www.uni-jena.de/~pfk/mpp/sv8/header.html
+
+ $ThisFileInfo['mpc']['header'] = array();
+ $thisfile_mpc_header = &$ThisFileInfo['mpc']['header'];
+
+ $ThisFileInfo['fileformat'] = 'mpc';
+ $ThisFileInfo['audio']['dataformat'] = 'mpc';
+ $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
+ $ThisFileInfo['audio']['channels'] = 2; // the format appears to be hardcoded for stereo only
+ $ThisFileInfo['audio']['lossless'] = false;
+
+ fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+
+ $thisfile_mpc_header['size'] = 28;
+ $MPCheaderData = fread($fd, $thisfile_mpc_header['size']);
+ $offset = 0;
+
+ if (substr($MPCheaderData, $offset, 3) == 'MP+') {
+
+ // great, this is SV7+
+ $thisfile_mpc_header['raw']['preamble'] = substr($MPCheaderData, $offset, 3); // should be 'MP+'
+ $offset += 3;
+
+ } elseif (preg_match('/^[\x00\x01\x10\x11\x40\x41\x50\x51\x80\x81\x90\x91\xC0\xC1\xD0\xD1][\x20-37][\x00\x20\x40\x60\x80\xA0\xC0\xE0]/s', substr($MPCheaderData, 0, 4))) {
+
+ // this is SV4 - SV6, handle seperately
+ $thisfile_mpc_header['size'] = 8;
+
+ // add size of file header to avdataoffset - calc bitrate correctly + MD5 data
+ $ThisFileInfo['avdataoffset'] += $thisfile_mpc_header['size'];
+
+ // Most of this code adapted from Jurgen Faul's MPEGplus source code - thanks Jurgen! :)
+ $HeaderDWORD[0] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, 0, 4));
+ $HeaderDWORD[1] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, 4, 4));
+
+
+ // DDDD DDDD CCCC CCCC BBBB BBBB AAAA AAAA
+ // aaaa aaaa abcd dddd dddd deee eeff ffff
+ //
+ // a = bitrate = anything
+ // b = IS = anything
+ // c = MS = anything
+ // d = streamversion = 0000000004 or 0000000005 or 0000000006
+ // e = maxband = anything
+ // f = blocksize = 000001 for SV5+, anything(?) for SV4
+
+ $thisfile_mpc_header['target_bitrate'] = (($HeaderDWORD[0] & 0xFF800000) >> 23);
+ $thisfile_mpc_header['intensity_stereo'] = (bool) (($HeaderDWORD[0] & 0x00400000) >> 22);
+ $thisfile_mpc_header['mid-side_stereo'] = (bool) (($HeaderDWORD[0] & 0x00200000) >> 21);
+ $thisfile_mpc_header['stream_major_version'] = ($HeaderDWORD[0] & 0x001FF800) >> 11;
+ $thisfile_mpc_header['stream_minor_version'] = 0; // no sub-version numbers before SV7
+ $thisfile_mpc_header['max_band'] = ($HeaderDWORD[0] & 0x000007C0) >> 6; // related to lowpass frequency, not sure how it translates exactly
+ $thisfile_mpc_header['block_size'] = ($HeaderDWORD[0] & 0x0000003F);
+
+ switch ($thisfile_mpc_header['stream_major_version']) {
+ case 4:
+ $thisfile_mpc_header['frame_count'] = ($HeaderDWORD[1] >> 16);
+ break;
+
+ case 5:
+ case 6:
+ $thisfile_mpc_header['frame_count'] = $HeaderDWORD[1];
+ break;
+
+ default:
+ $ThisFileInfo['error'] = 'Expecting 4, 5 or 6 in version field, found '.$thisfile_mpc_header['stream_major_version'].' instead';
+ unset($ThisFileInfo['mpc']);
+ return false;
+ break;
+ }
+
+ if (($thisfile_mpc_header['stream_major_version'] > 4) && ($thisfile_mpc_header['block_size'] != 1)) {
+ $ThisFileInfo['warning'][] = 'Block size expected to be 1, actual value found: '.$thisfile_mpc_header['block_size'];
+ }
+
+ $thisfile_mpc_header['sample_rate'] = 44100; // AB: used by all files up to SV7
+ $ThisFileInfo['audio']['sample_rate'] = $thisfile_mpc_header['sample_rate'];
+ $thisfile_mpc_header['samples'] = $thisfile_mpc_header['frame_count'] * 1152 * $ThisFileInfo['audio']['channels'];
+
+ if ($thisfile_mpc_header['target_bitrate'] == 0) {
+ $ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
+ } else {
+ $ThisFileInfo['audio']['bitrate_mode'] = 'cbr';
+ }
+
+ $ThisFileInfo['mpc']['bitrate'] = ($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8 * 44100 / $thisfile_mpc_header['frame_count'] / 1152;
+ $ThisFileInfo['audio']['bitrate'] = $ThisFileInfo['mpc']['bitrate'];
+ $ThisFileInfo['audio']['encoder'] = 'SV'.$thisfile_mpc_header['stream_major_version'];
+
+ return true;
+
+ } else {
+
+ $ThisFileInfo['error'][] = 'Expecting "MP+" at offset '.$ThisFileInfo['avdataoffset'].', found "'.substr($MPCheaderData, $offset, 3).'"';
+ unset($ThisFileInfo['fileformat']);
+ unset($ThisFileInfo['mpc']);
+ return false;
+
+ }
+
+ // Continue with SV7+ handling
+ $StreamVersionByte = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 1));
+ $offset += 1;
+ $thisfile_mpc_header['stream_major_version'] = ($StreamVersionByte & 0x0F);
+ $thisfile_mpc_header['stream_minor_version'] = ($StreamVersionByte & 0xF0) >> 4;
+ $thisfile_mpc_header['frame_count'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 4));
+ $offset += 4;
+
+ switch ($thisfile_mpc_header['stream_major_version']) {
+ case 7:
+ //$ThisFileInfo['fileformat'] = 'SV7';
+ break;
+
+ default:
+ $ThisFileInfo['error'][] = 'Only Musepack SV7 supported';
+ return false;
+ }
+
+ $FlagsDWORD1 = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 4));
+ $offset += 4;
+ $thisfile_mpc_header['intensity_stereo'] = (bool) (($FlagsDWORD1 & 0x80000000) >> 31);
+ $thisfile_mpc_header['mid_side_stereo'] = (bool) (($FlagsDWORD1 & 0x40000000) >> 30);
+ $thisfile_mpc_header['max_subband'] = ($FlagsDWORD1 & 0x3F000000) >> 24;
+ $thisfile_mpc_header['raw']['profile'] = ($FlagsDWORD1 & 0x00F00000) >> 20;
+ $thisfile_mpc_header['begin_loud'] = (bool) (($FlagsDWORD1 & 0x00080000) >> 19);
+ $thisfile_mpc_header['end_loud'] = (bool) (($FlagsDWORD1 & 0x00040000) >> 18);
+ $thisfile_mpc_header['raw']['sample_rate'] = ($FlagsDWORD1 & 0x00030000) >> 16;
+ $thisfile_mpc_header['max_level'] = ($FlagsDWORD1 & 0x0000FFFF);
+
+ $thisfile_mpc_header['raw']['title_peak'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 2));
+ $offset += 2;
+ $thisfile_mpc_header['raw']['title_gain'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 2), true);
+ $offset += 2;
+
+ $thisfile_mpc_header['raw']['album_peak'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 2));
+ $offset += 2;
+ $thisfile_mpc_header['raw']['album_gain'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 2), true);
+ $offset += 2;
+
+ $FlagsDWORD2 = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 4));
+ $offset += 4;
+ $thisfile_mpc_header['true_gapless'] = (bool) (($FlagsDWORD2 & 0x80000000) >> 31);
+ $thisfile_mpc_header['last_frame_length'] = ($FlagsDWORD2 & 0x7FF00000) >> 20;
+
+
+ $thisfile_mpc_header['raw']['not_sure_what'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 3));
+ $offset += 3;
+ $thisfile_mpc_header['raw']['encoder_version'] = getid3_lib::LittleEndian2Int(substr($MPCheaderData, $offset, 1));
+ $offset += 1;
+
+ $thisfile_mpc_header['profile'] = $this->MPCprofileNameLookup($thisfile_mpc_header['raw']['profile']);
+ $thisfile_mpc_header['sample_rate'] = $this->MPCfrequencyLookup($thisfile_mpc_header['raw']['sample_rate']);
+ if ($thisfile_mpc_header['sample_rate'] == 0) {
+ $ThisFileInfo['error'][] = 'Corrupt MPC file: frequency == zero';
+ return false;
+ }
+ $ThisFileInfo['audio']['sample_rate'] = $thisfile_mpc_header['sample_rate'];
+ $thisfile_mpc_header['samples'] = ((($thisfile_mpc_header['frame_count'] - 1) * 1152) + $thisfile_mpc_header['last_frame_length']) * $ThisFileInfo['audio']['channels'];
+
+ $ThisFileInfo['playtime_seconds'] = ($thisfile_mpc_header['samples'] / $ThisFileInfo['audio']['channels']) / $ThisFileInfo['audio']['sample_rate'];
+ if ($ThisFileInfo['playtime_seconds'] == 0) {
+ $ThisFileInfo['error'][] = 'Corrupt MPC file: playtime_seconds == zero';
+ return false;
+ }
+
+ // add size of file header to avdataoffset - calc bitrate correctly + MD5 data
+ $ThisFileInfo['avdataoffset'] += $thisfile_mpc_header['size'];
+
+ $ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
+
+ $thisfile_mpc_header['title_peak'] = $thisfile_mpc_header['raw']['title_peak'];
+ $thisfile_mpc_header['title_peak_db'] = $this->MPCpeakDBLookup($thisfile_mpc_header['title_peak']);
+ if ($thisfile_mpc_header['raw']['title_gain'] < 0) {
+ $thisfile_mpc_header['title_gain_db'] = (float) (32768 + $thisfile_mpc_header['raw']['title_gain']) / -100;
+ } else {
+ $thisfile_mpc_header['title_gain_db'] = (float) $thisfile_mpc_header['raw']['title_gain'] / 100;
+ }
+
+ $thisfile_mpc_header['album_peak'] = $thisfile_mpc_header['raw']['album_peak'];
+ $thisfile_mpc_header['album_peak_db'] = $this->MPCpeakDBLookup($thisfile_mpc_header['album_peak']);
+ if ($thisfile_mpc_header['raw']['album_gain'] < 0) {
+ $thisfile_mpc_header['album_gain_db'] = (float) (32768 + $thisfile_mpc_header['raw']['album_gain']) / -100;
+ } else {
+ $thisfile_mpc_header['album_gain_db'] = (float) $thisfile_mpc_header['raw']['album_gain'] / 100;;
+ }
+ $thisfile_mpc_header['encoder_version'] = $this->MPCencoderVersionLookup($thisfile_mpc_header['raw']['encoder_version']);
+
+ $ThisFileInfo['replay_gain']['track']['adjustment'] = $thisfile_mpc_header['title_gain_db'];
+ $ThisFileInfo['replay_gain']['album']['adjustment'] = $thisfile_mpc_header['album_gain_db'];
+
+ if ($thisfile_mpc_header['title_peak'] > 0) {
+ $ThisFileInfo['replay_gain']['track']['peak'] = $thisfile_mpc_header['title_peak'];
+ } elseif (round($thisfile_mpc_header['max_level'] * 1.18) > 0) {
+ $ThisFileInfo['replay_gain']['track']['peak'] = getid3_lib::CastAsInt(round($thisfile_mpc_header['max_level'] * 1.18)); // why? I don't know - see mppdec.c
+ }
+ if ($thisfile_mpc_header['album_peak'] > 0) {
+ $ThisFileInfo['replay_gain']['album']['peak'] = $thisfile_mpc_header['album_peak'];
+ }
+
+ //$ThisFileInfo['audio']['encoder'] = 'SV'.$thisfile_mpc_header['stream_major_version'].'.'.$thisfile_mpc_header['stream_minor_version'].', '.$thisfile_mpc_header['encoder_version'];
+ $ThisFileInfo['audio']['encoder'] = $thisfile_mpc_header['encoder_version'];
+ $ThisFileInfo['audio']['encoder_options'] = $thisfile_mpc_header['profile'];
+
+ return true;
+ }
+
+ function MPCprofileNameLookup($profileid) {
+ static $MPCprofileNameLookup = array(
+ 0 => 'no profile',
+ 1 => 'Experimental',
+ 2 => 'unused',
+ 3 => 'unused',
+ 4 => 'unused',
+ 5 => 'below Telephone (q = 0.0)',
+ 6 => 'below Telephone (q = 1.0)',
+ 7 => 'Telephone (q = 2.0)',
+ 8 => 'Thumb (q = 3.0)',
+ 9 => 'Radio (q = 4.0)',
+ 10 => 'Standard (q = 5.0)',
+ 11 => 'Extreme (q = 6.0)',
+ 12 => 'Insane (q = 7.0)',
+ 13 => 'BrainDead (q = 8.0)',
+ 14 => 'above BrainDead (q = 9.0)',
+ 15 => 'above BrainDead (q = 10.0)'
+ );
+ return (isset($MPCprofileNameLookup[$profileid]) ? $MPCprofileNameLookup[$profileid] : 'invalid');
+ }
+
+ function MPCfrequencyLookup($frequencyid) {
+ static $MPCfrequencyLookup = array(
+ 0 => 44100,
+ 1 => 48000,
+ 2 => 37800,
+ 3 => 32000
+ );
+ return (isset($MPCfrequencyLookup[$frequencyid]) ? $MPCfrequencyLookup[$frequencyid] : 'invalid');
+ }
+
+ function MPCpeakDBLookup($intvalue) {
+ if ($intvalue > 0) {
+ return ((log10($intvalue) / log10(2)) - 15) * 6;
+ }
+ return false;
+ }
+
+ function MPCencoderVersionLookup($encoderversion) {
+ //Encoder version * 100 (106 = 1.06)
+ //EncoderVersion % 10 == 0 Release (1.0)
+ //EncoderVersion % 2 == 0 Beta (1.06)
+ //EncoderVersion % 2 == 1 Alpha (1.05a...z)
+
+ if ($encoderversion == 0) {
+ // very old version, not known exactly which
+ return 'Buschmann v1.7.0-v1.7.9 or Klemm v0.90-v1.05';
+ }
+
+ if (($encoderversion % 10) == 0) {
+
+ // release version
+ return number_format($encoderversion / 100, 2);
+
+ } elseif (($encoderversion % 2) == 0) {
+
+ // beta version
+ return number_format($encoderversion / 100, 2).' beta';
+
+ }
+
+ // alpha version
+ return number_format($encoderversion / 100, 2).' alpha';
+ }
+
+}
+
+
+?> \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-08-13 07:34:51 +0000