module.audio-video.asf.php

一个用PHP编写的

						case GETID3_ASF_No_Error_Correction:
							// should be no data, but just in case there is, skip to the end of the field
							$offset += $thisfile_asf_errorcorrectionobject['error_correction_data_length'];
							break;

						case GETID3_ASF_Audio_Spread:
							// Field Name                   Field Type   Size (bits)
							// Span                         BYTE         8               // number of packets over which audio will be spread.
							// Virtual Packet Length        WORD         16              // size of largest audio payload found in audio stream
							// Virtual Chunk Length         WORD         16              // size of largest audio payload found in audio stream
							// Silence Data Length          WORD         16              // number of bytes in Silence Data field
							// Silence Data                 BYTESTREAM   variable        // hardcoded: 0x00 * (Silence Data Length) bytes

							$thisfile_asf_errorcorrectionobject['span']                  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 1));
							$offset += 1;
							$thisfile_asf_errorcorrectionobject['virtual_packet_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['virtual_chunk_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['silence_data_length']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
							$offset += 2;
							$thisfile_asf_errorcorrectionobject['silence_data']          = substr($ASFHeaderData, $offset, $thisfile_asf_errorcorrectionobject['silence_data_length']);
							$offset += $thisfile_asf_errorcorrectionobject['silence_data_length'];
							break;

						default:
							$ThisFileInfo['warning'][] = 'error_correction_object.error_correction_type GUID {'.$this->BytestringToGUID($thisfile_asf_errorcorrectionobject['reserved']).'} does not match expected "GETID3_ASF_No_Error_Correction" GUID {'.$this->BytestringToGUID(GETID3_ASF_No_Error_Correction).'} or  "GETID3_ASF_Audio_Spread" GUID {'.$this->BytestringToGUID(GETID3_ASF_Audio_Spread).'}';
							//return false;
							break;
					}

					break;

				case GETID3_ASF_Content_Description_Object:
					// Content Description Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Content Description object - GETID3_ASF_Content_Description_Object
					// Object Size                  QWORD        64              // size of Content Description object, including 34 bytes of Content Description Object header
					// Title Length                 WORD         16              // number of bytes in Title field
					// Author Length                WORD         16              // number of bytes in Author field
					// Copyright Length             WORD         16              // number of bytes in Copyright field
					// Description Length           WORD         16              // number of bytes in Description field
					// Rating Length                WORD         16              // number of bytes in Rating field
					// Title                        WCHAR        16              // array of Unicode characters - Title
					// Author                       WCHAR        16              // array of Unicode characters - Author
					// Copyright                    WCHAR        16              // array of Unicode characters - Copyright
					// Description                  WCHAR        16              // array of Unicode characters - Description
					// Rating                       WCHAR        16              // array of Unicode characters - Rating

					// shortcut
					$thisfile_asf['content_description_object'] = array();
					$thisfile_asf_contentdescriptionobject      = &$thisfile_asf['content_description_object'];

					$thisfile_asf_contentdescriptionobject['objectid']              = $NextObjectGUID;
					$thisfile_asf_contentdescriptionobject['objectid_guid']         = $NextObjectGUIDtext;
					$thisfile_asf_contentdescriptionobject['objectsize']            = $NextObjectSize;
					$thisfile_asf_contentdescriptionobject['title_length']          = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['author_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['copyright_length']      = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['description_length']    = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['rating_length']         = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					$thisfile_asf_contentdescriptionobject['title']                 = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['title_length']);
					$offset += $thisfile_asf_contentdescriptionobject['title_length'];
					$thisfile_asf_contentdescriptionobject['author']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['author_length']);
					$offset += $thisfile_asf_contentdescriptionobject['author_length'];
					$thisfile_asf_contentdescriptionobject['copyright']             = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['copyright_length']);
					$offset += $thisfile_asf_contentdescriptionobject['copyright_length'];
					$thisfile_asf_contentdescriptionobject['description']           = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['description_length']);
					$offset += $thisfile_asf_contentdescriptionobject['description_length'];
					$thisfile_asf_contentdescriptionobject['rating']                = substr($ASFHeaderData, $offset, $thisfile_asf_contentdescriptionobject['rating_length']);
					$offset += $thisfile_asf_contentdescriptionobject['rating_length'];

					$ASFcommentKeysToCopy = array('title'=>'title', 'author'=>'artist', 'copyright'=>'copyright', 'description'=>'comment', 'rating'=>'rating');
					foreach ($ASFcommentKeysToCopy as $keytocopyfrom => $keytocopyto) {
						if (!empty($thisfile_asf_contentdescriptionobject[$keytocopyfrom])) {
							$thisfile_asf_comments[$keytocopyto][] = $this->TrimTerm($thisfile_asf_contentdescriptionobject[$keytocopyfrom]);
						}
					}
					break;

				case GETID3_ASF_Extended_Content_Description_Object:
					// Extended Content Description Object: (optional, one only)
					// Field Name                   Field Type   Size (bits)
					// Object ID                    GUID         128             // GUID for Extended Content Description object - GETID3_ASF_Extended_Content_Description_Object
					// Object Size                  QWORD        64              // size of ExtendedContent Description object, including 26 bytes of Extended Content Description Object header
					// Content Descriptors Count    WORD         16              // number of entries in Content Descriptors list
					// Content Descriptors          array of:    variable        //
					// * Descriptor Name Length     WORD         16              // size in bytes of Descriptor Name field
					// * Descriptor Name            WCHAR        variable        // array of Unicode characters - Descriptor Name
					// * Descriptor Value Data Type WORD         16              // Lookup array:
																					// 0x0000 = Unicode String (variable length)
																					// 0x0001 = BYTE array     (variable length)
																					// 0x0002 = BOOL           (DWORD, 32 bits)
																					// 0x0003 = DWORD          (DWORD, 32 bits)
																					// 0x0004 = QWORD          (QWORD, 64 bits)
																					// 0x0005 = WORD           (WORD,  16 bits)
					// * Descriptor Value Length    WORD         16              // number of bytes stored in Descriptor Value field
					// * Descriptor Value           variable     variable        // value for Content Descriptor

					// shortcut
					$thisfile_asf['extended_content_description_object'] = array();
					$thisfile_asf_extendedcontentdescriptionobject       = &$thisfile_asf['extended_content_description_object'];

					$thisfile_asf_extendedcontentdescriptionobject['objectid']                  = $NextObjectGUID;
					$thisfile_asf_extendedcontentdescriptionobject['objectid_guid']             = $NextObjectGUIDtext;
					$thisfile_asf_extendedcontentdescriptionobject['objectsize']                = $NextObjectSize;
					$thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
					$offset += 2;
					for ($ExtendedContentDescriptorsCounter = 0; $ExtendedContentDescriptorsCounter < $thisfile_asf_extendedcontentdescriptionobject['content_descriptors_count']; $ExtendedContentDescriptorsCounter++) {
						// shortcut
						$thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter] = array();
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current                                  = &$thisfile_asf_extendedcontentdescriptionobject['content_descriptors'][$ExtendedContentDescriptorsCounter];

						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['base_offset']  = $offset + 30;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']  = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']         = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length']);
						$offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name_length'];
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']   = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'] = getid3_lib::LittleEndian2Int(substr($ASFHeaderData, $offset, 2));
						$offset += 2;
						$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']        = substr($ASFHeaderData, $offset, $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length']);
						$offset += $thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_length'];
						switch ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type']) {
							case 0x0000: // Unicode string
								break;

							case 0x0001: // BYTE array
								// do nothing
								break;

							case 0x0002: // BOOL
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = (bool) getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								break;

							case 0x0003: // DWORD
							case 0x0004: // QWORD
							case 0x0005: // WORD
								$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'] = getid3_lib::LittleEndian2Int($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']);
								break;

							default:
								$ThisFileInfo['warning'][] = 'extended_content_description.content_descriptors.'.$ExtendedContentDescriptorsCounter.'.value_type is invalid ('.$thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value_type'].')';
								//return false;
								break;
						}
						switch ($this->TrimConvert(strtolower($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['name']))) {

							case 'wm/albumartist':
							case 'artist':
								$thisfile_asf_comments['artist'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

							case 'wm/albumtitle':
							case 'album':
								$thisfile_asf_comments['album']  = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

							case 'wm/genre':
							case 'genre':
								$thisfile_asf_comments['genre'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

							case 'wm/tracknumber':
							case 'tracknumber':
								$thisfile_asf_comments['track'] = array(intval($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value'])));
								break;

							case 'wm/track':
								if (empty($thisfile_asf_comments['track'])) {
									$thisfile_asf_comments['track'] = array(1 + $this->TrimConvert($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								}
								break;

							case 'wm/year':
							case 'year':
							case 'date':
								$thisfile_asf_comments['year'] = array( $this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

							case 'wm/lyrics':
							case 'lyrics':
								$thisfile_asf_comments['lyrics'] = array($this->TrimTerm($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']));
								break;

							case 'isvbr':
								if ($thisfile_asf_extendedcontentdescriptionobject_contentdescriptor_current['value']) {
									$thisfile_audio['bitrate_mode'] = 'vbr';