Replaced mediainfo calls by getid3

1 files changed, 126 insertions, 0 deletions

diff --git a/getid3/module.audio.lpac.php b/getid3/module.audio.lpac.php
new file mode 100644
index 0000000..3c04492
--- /dev/null
+++ b/getid3/module.audio.lpac.php
@@ -0,0 +1,126 @@
+<?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.lpac.php                                       //
+// module for analyzing LPAC Audio files                       //
+// dependencies: module.audio-video.riff.php                   //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);
+
+class getid3_lpac
+{
+
+	function getid3_lpac(&$fd, &$ThisFileInfo) {
+
+		fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+		$LPACheader = fread($fd, 14);
+		if (substr($LPACheader, 0, 4) != 'LPAC') {
+			$ThisFileInfo['error'][] = 'Expected "LPAC" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$StreamMarker.'"';
+			return false;
+		}
+		$ThisFileInfo['avdataoffset'] += 14;
+
+		$ThisFileInfo['fileformat']            = 'lpac';
+		$ThisFileInfo['audio']['dataformat']   = 'lpac';
+		$ThisFileInfo['audio']['lossless']     = true;
+		$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
+
+		$ThisFileInfo['lpac']['file_version'] = getid3_lib::BigEndian2Int(substr($LPACheader,  4, 1));
+		$flags['audio_type']                  = getid3_lib::BigEndian2Int(substr($LPACheader,  5, 1));
+		$ThisFileInfo['lpac']['total_samples']= getid3_lib::BigEndian2Int(substr($LPACheader,  6, 4));
+		$flags['parameters']                  = getid3_lib::BigEndian2Int(substr($LPACheader, 10, 4));
+
+		$ThisFileInfo['lpac']['flags']['is_wave'] = (bool) ($flags['audio_type'] & 0x40);
+		$ThisFileInfo['lpac']['flags']['stereo']  = (bool) ($flags['audio_type'] & 0x04);
+		$ThisFileInfo['lpac']['flags']['24_bit']  = (bool) ($flags['audio_type'] & 0x02);
+		$ThisFileInfo['lpac']['flags']['16_bit']  = (bool) ($flags['audio_type'] & 0x01);
+
+		if ($ThisFileInfo['lpac']['flags']['24_bit'] && $ThisFileInfo['lpac']['flags']['16_bit']) {
+			$ThisFileInfo['warning'][] = '24-bit and 16-bit flags cannot both be set';
+		}
+
+		$ThisFileInfo['lpac']['flags']['fast_compress']             =  (bool) ($flags['parameters'] & 0x40000000);
+		$ThisFileInfo['lpac']['flags']['random_access']             =  (bool) ($flags['parameters'] & 0x08000000);
+		$ThisFileInfo['lpac']['block_length']                       = pow(2, (($flags['parameters'] & 0x07000000) >> 24)) * 256;
+		$ThisFileInfo['lpac']['flags']['adaptive_prediction_order'] =  (bool) ($flags['parameters'] & 0x00800000);
+		$ThisFileInfo['lpac']['flags']['adaptive_quantization']     =  (bool) ($flags['parameters'] & 0x00400000);
+		$ThisFileInfo['lpac']['flags']['joint_stereo']              =  (bool) ($flags['parameters'] & 0x00040000);
+		$ThisFileInfo['lpac']['quantization']                       =         ($flags['parameters'] & 0x00001F00) >> 8;
+		$ThisFileInfo['lpac']['max_prediction_order']               =         ($flags['parameters'] & 0x0000003F);
+
+		if ($ThisFileInfo['lpac']['flags']['fast_compress'] && ($ThisFileInfo['lpac']['max_prediction_order'] != 3)) {
+			$ThisFileInfo['warning'][] = 'max_prediction_order expected to be "3" if fast_compress is true, actual value is "'.$ThisFileInfo['lpac']['max_prediction_order'].'"';
+		}
+		switch ($ThisFileInfo['lpac']['file_version']) {
+			case 6:
+				if ($ThisFileInfo['lpac']['flags']['adaptive_quantization']) {
+					$ThisFileInfo['warning'][] = 'adaptive_quantization expected to be false in LPAC file stucture v6, actually true';
+				}
+				if ($ThisFileInfo['lpac']['quantization'] != 20) {
+					$ThisFileInfo['warning'][] = 'Quantization expected to be 20 in LPAC file stucture v6, actually '.$ThisFileInfo['lpac']['flags']['Q'];
+				}
+				break;
+
+			default:
+				//$ThisFileInfo['warning'][] = 'This version of getID3() only supports LPAC file format version 6, this file is version '.$ThisFileInfo['lpac']['file_version'].' - please report to info@getid3.org';
+				break;
+		}
+
+		$dummy = $ThisFileInfo;
+		$riff = new getid3_riff($fd, $dummy);
+		unset($riff);
+		$ThisFileInfo['avdataoffset']                = $dummy['avdataoffset'];
+		$ThisFileInfo['riff']                        = $dummy['riff'];
+		$ThisFileInfo['error']                       = $dummy['error'];
+		$ThisFileInfo['warning']                     = $dummy['warning'];
+		$ThisFileInfo['lpac']['comments']['comment'] = $dummy['comments'];
+		$ThisFileInfo['audio']['sample_rate']        = $dummy['audio']['sample_rate'];
+
+		$ThisFileInfo['audio']['channels']    = ($ThisFileInfo['lpac']['flags']['stereo'] ? 2 : 1);
+
+		if ($ThisFileInfo['lpac']['flags']['24_bit']) {
+			$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['riff']['audio'][0]['bits_per_sample'];
+		} elseif ($ThisFileInfo['lpac']['flags']['16_bit']) {
+			$ThisFileInfo['audio']['bits_per_sample'] = 16;
+		} else {
+			$ThisFileInfo['audio']['bits_per_sample'] = 8;
+		}
+
+		if ($ThisFileInfo['lpac']['flags']['fast_compress']) {
+			 // fast
+			$ThisFileInfo['audio']['encoder_options'] = '-1';
+		} else {
+			switch ($ThisFileInfo['lpac']['max_prediction_order']) {
+				case 20: // simple
+					$ThisFileInfo['audio']['encoder_options'] = '-2';
+					break;
+				case 30: // medium
+					$ThisFileInfo['audio']['encoder_options'] = '-3';
+					break;
+				case 40: // high
+					$ThisFileInfo['audio']['encoder_options'] = '-4';
+					break;
+				case 60: // extrahigh
+					$ThisFileInfo['audio']['encoder_options'] = '-5';
+					break;
+			}
+		}
+
+		$ThisFileInfo['playtime_seconds'] = $ThisFileInfo['lpac']['total_samples'] / $ThisFileInfo['audio']['sample_rate'];
+		$ThisFileInfo['audio']['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
+
+		return true;
+	}
+
+}
+
+
+?>
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