Exemple #1
0
        private void writeCommentChunk(BinaryWriter w, MetaFieldInfo info, string comment = "")
        {
            byte[] commentData = null;

            if (null == info) // Plain string
            {
                w.Write(StreamUtils.EncodeBEUInt32(encodeTimestamp(DateTime.Now)));
                w.Write((short)0);
                commentData = Utils.Latin1Encoding.GetBytes(comment);
            }
            else
            {
                w.Write(StreamUtils.EncodeBEUInt32(((CommentData)info.SpecificData).Timestamp));
                w.Write(StreamUtils.EncodeBEInt16(((CommentData)info.SpecificData).MarkerId));
                commentData = Utils.Latin1Encoding.GetBytes(info.Value);
            }

            w.Write(StreamUtils.EncodeBEUInt16((ushort)commentData.Length));
            w.Write(commentData);
        }
Exemple #2
0
        protected override int write(TagData tag, BinaryWriter w, string zone)
        {
            int result = 0;

            if (zone.Equals(CHUNKTYPE_NAME))
            {
                if (tag.Title.Length > 0)
                {
                    w.Write(Utils.Latin1Encoding.GetBytes(zone));
                    long sizePos = w.BaseStream.Position;
                    w.Write(0); // Placeholder for field size that will be rewritten at the end of the method

                    byte[] strBytes = Utils.Latin1Encoding.GetBytes(tag.Title);
                    w.Write(strBytes);

                    w.BaseStream.Seek(sizePos, SeekOrigin.Begin);
                    w.Write(StreamUtils.EncodeBEInt32(strBytes.Length));

                    result++;
                }
            }
            else if (zone.Equals(CHUNKTYPE_AUTHOR))
            {
                if (tag.Artist.Length > 0)
                {
                    w.Write(Utils.Latin1Encoding.GetBytes(zone));
                    long sizePos = w.BaseStream.Position;
                    w.Write(0); // Placeholder for field size that will be rewritten at the end of the method

                    byte[] strBytes = Utils.Latin1Encoding.GetBytes(tag.Artist);
                    w.Write(strBytes);

                    w.BaseStream.Seek(sizePos, SeekOrigin.Begin);
                    w.Write(StreamUtils.EncodeBEInt32(strBytes.Length));

                    result++;
                }
            }
            else if (zone.Equals(CHUNKTYPE_COPYRIGHT))
            {
                if (tag.Copyright.Length > 0)
                {
                    w.Write(Utils.Latin1Encoding.GetBytes(zone));
                    long sizePos = w.BaseStream.Position;
                    w.Write(0); // Placeholder for field size that will be rewritten at the end of the method

                    byte[] strBytes = Utils.Latin1Encoding.GetBytes(tag.Copyright);
                    w.Write(strBytes);

                    w.BaseStream.Seek(sizePos, SeekOrigin.Begin);
                    w.Write(StreamUtils.EncodeBEInt32(strBytes.Length));

                    result++;
                }
            }
            else if (zone.StartsWith(CHUNKTYPE_ANNOTATION))
            {
                // Do not write anything, this field is deprecated (Cf. specs "Use of this chunk is discouraged within FORM AIFC. The more refined Comments Chunk should be used instead")
            }
            else if (zone.StartsWith(CHUNKTYPE_COMMENTS))
            {
                bool applicable = tag.Comment.Length > 0;
                if (!applicable && tag.AdditionalFields.Count > 0)
                {
                    foreach (MetaFieldInfo fieldInfo in tag.AdditionalFields)
                    {
                        applicable = (fieldInfo.NativeFieldCode.StartsWith(CHUNKTYPE_COMMENTS));
                        if (applicable)
                        {
                            break;
                        }
                    }
                }

                if (applicable)
                {
                    ushort numComments = 0;
                    w.Write(Utils.Latin1Encoding.GetBytes(CHUNKTYPE_COMMENTS));
                    long sizePos = w.BaseStream.Position;
                    w.Write(0);         // Placeholder for 'chunk size' field that will be rewritten at the end of the method
                    w.Write((ushort)0); // Placeholder for 'number of comments' field that will be rewritten at the end of the method

                    // First write generic comments (those linked to the Comment field)
                    string[] comments = tag.Comment.Split(Settings.InternalValueSeparator);
                    foreach (string s in comments)
                    {
                        writeCommentChunk(w, null, s);
                        numComments++;
                    }

                    // Then write comments linked to a Marker ID
                    if (tag.AdditionalFields != null && tag.AdditionalFields.Count > 0)
                    {
                        foreach (MetaFieldInfo fieldInfo in tag.AdditionalFields)
                        {
                            if (fieldInfo.NativeFieldCode.StartsWith(CHUNKTYPE_COMMENTS))
                            {
                                if (((CommentData)fieldInfo.SpecificData).MarkerId != 0)
                                {
                                    writeCommentChunk(w, fieldInfo);
                                    numComments++;
                                }
                            }
                        }
                    }


                    long dataEndPos = w.BaseStream.Position;

                    w.BaseStream.Seek(sizePos, SeekOrigin.Begin);
                    w.Write(StreamUtils.EncodeBEInt32((int)(dataEndPos - sizePos - 4)));
                    w.Write(StreamUtils.EncodeBEUInt16(numComments));

                    result++;
                }
            }

            return(result);
        }