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WMA редактирование [D7]

spz © (2006-10-30 11:16:00)
подскажите пжл как читать/редактировать информацию из WMA-файла (артист,альбом и т.д.)

firemen (2006-11-06 09:49:00) [1]
Держи простенькую библиотеку.

unit WMAfile;

interface

uses
Classes, SysUtils;

const
{ Channel modes }
WMA_CM_UNKNOWN = 0; { Unknown }
WMA_CM_MONO = 1; { Mono }
WMA_CM_STEREO = 2; { Stereo }

{ Channel mode names }
WMA_MODE: array [0..2] of string = ('Unknown', 'Mono', 'Stereo');

type
{ Class TWMAfile }
TWMAfile = class(TObject)
private
{ Private declarations }
FValid: Boolean;
FFileSize: Integer;
FChannelModeID: Byte;
FSampleRate: Integer;
FDuration: Double;
FBitRate: Integer;
FTitle: WideString;
FArtist: WideString;
FAlbum: WideString;
FTrack: Integer;
FYear: WideString;
FGenre: WideString;
FComment: WideString;
procedure FResetData;
function FGetChannelMode: string;
public
{ Public declarations }
constructor Create; { Create object }
function ReadFromFile(const FileName: string): Boolean; { Load data }
property Valid: Boolean read FValid; { True if valid data }
property FileSize: Integer read FFileSize; { File size (bytes) }
property ChannelModeID: Byte read FChannelModeID; { Channel mode code }
property ChannelMode: string read FGetChannelMode; { Channel mode name }
property SampleRate: Integer read FSampleRate; { Sample rate (hz) }
property Duration: Double read FDuration; { Duration (seconds) }
property BitRate: Integer read FBitRate; { Bit rate (kbit) }
property Title: WideString read FTitle; { Song title }
property Artist: WideString read FArtist; { Artist name }
property Album: WideString read FAlbum; { Album name }
property Track: Integer read FTrack; { Track number }
property Year: WideString read FYear; { Year }
property Genre: WideString read FGenre; { Genre name }
property Comment: WideString read FComment; { Comment }
end;

implementation

const
{ Object IDs }
WMA_HEADER_ID =
#48#38#178#117#142#102#207#17#166#217#0#170#0#98#206#108;
WMA_FILE_PROPERTIES_ID =
#161#220#171#140#71#169#207#17#142#228#0#192#12#32#83#101;
WMA_STREAM_PROPERTIES_ID =
#145#7#220#183#183#169#207#17#142#230#0#192#12#32#83#101;
WMA_CONTENT_DESCRIPTION_ID =
#51#38#178#117#142#102#207#17#166#217#0#170#0#98#206#108;
WMA_EXTENDED_CONTENT_DESCRIPTION_ID =
#64#164#208#210#7#227#210#17#151#240#0#160#201#94#168#80;

{ Max. number of supported comment fields }
WMA_FIELD_COUNT = 7;

{ Names of supported comment fields }
WMA_FIELD_NAME: array [1..WMA_FIELD_COUNT] of WideString =
('WM/TITLE', 'WM/AUTHOR', 'WM/ALBUMTITLE', 'WM/TRACK', 'WM/YEAR',
'WM/GENRE', 'WM/DESCRIPTION');

{ Max. number of characters in tag field }
WMA_MAX_STRING_SIZE = 250;

type
{ Object ID }
ObjectID = array [1..16] of Char;

{ Tag data }
TagData = array [1..WMA_FIELD_COUNT] of WideString;

{ File data - for internal use }
FileData = record
FileSize: Integer; { File size (bytes) }
MaxBitRate: Integer; { Max. bit rate (bps) }
Channels: Word; { Number of channels }
SampleRate: Integer; { Sample rate (hz) }
ByteRate: Integer; { Byte rate }
Tag: TagData; { WMA tag information }
end;

function ReadFieldString(const Source: TStream; DataSize: Word): WideString;
var
Iterator, StringSize: Integer;
FieldData: array [1..WMA_MAX_STRING_SIZE * 2] of Byte;
begin
{ Read field data and convert to Unicode string }
Result := '';
StringSize := DataSize div 2;
if StringSize > WMA_MAX_STRING_SIZE then StringSize := WMA_MAX_STRING_SIZE;
Source.ReadBuffer(FieldData, StringSize * 2);
Source.Seek(DataSize - StringSize * 2, soFromCurrent);
for Iterator := 1 to StringSize do
Result := Result +
WideChar(FieldData[Iterator * 2 - 1] + (FieldData[Iterator * 2] shl 8));
end;

Извиняюсь, весь текст по размерам не входит.
Пиши на firemen01@ukr.net вышлю.

Stexen (2006-10-31 14:39:00) [2]
По моему WMA не документирован толко так что ковыряй, ничего сложного :)

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