private int sizeOfNode(FrameDataNode node)
{
var n = 0;
if (node != null)
{
n = 10;
n += 1;
switch (node.txt.enc)
{
default:
goto case 0;
case 0:
n += node.txt.dim;
break;
case 1:
n += node.txt.dim * 2;
break;
}
}
return(n);
}
private void appendNode(ID3TagSpec tag, FrameDataNode node)
{
if (tag.v2_tail == null || tag.v2_head == null)
{
tag.v2_head = node;
tag.v2_tail = node;
}
else
{
tag.v2_tail.nxt = node;
tag.v2_tail = node;
}
}
private FrameDataNode findNode(ID3TagSpec tag, int frame_id, FrameDataNode last)
{
var node = last != null ? last.nxt : tag.v2_head;
while (node != null)
{
if (node.fid == frame_id)
{
return(node);
}
node = node.nxt;
}
return(null);
}
private bool isSameDescriptorUcs2(FrameDataNode node, string dsc)
{
if (node.dsc.enc != 1 && node.dsc.dim > 0)
{
return(false);
}
for (var i = 0; i < node.dsc.dim; ++i)
{
if (null == dsc || node.dsc.l[i] != dsc[i])
{
return(false);
}
}
return(true);
}
private void id3v2_add_latin1(LameGlobalFlags gfp, int frame_id, string lang, string desc, string text)
{
var gfc = gfp.internal_flags;
if (gfc != null)
{
FrameDataNode node;
node = findNode(gfc.tag_spec, frame_id, null);
if (isMultiFrame(frame_id))
{
while (node != null)
{
if (isSameLang(node.lng, lang))
{
if (isSameDescriptor(node, desc))
{
break;
}
}
node = findNode(gfc.tag_spec, frame_id, node);
}
}
if (node == null)
{
node = new FrameDataNode();
appendNode(gfc.tag_spec, node);
}
node.fid = frame_id;
node.lng = setLang(lang);
node.dsc.l = desc;
node.dsc.dim = !ReferenceEquals(desc, null) ? desc.Length : 0;
node.dsc.enc = 0;
node.txt.l = text;
node.txt.dim = !ReferenceEquals(text, null) ? text.Length : 0;
node.txt.enc = 0;
gfc.tag_spec.flags |= CHANGED_FLAG | ADD_V2_FLAG;
}
}
private int set_frame_comment(sbyte[] frame, int framePos, FrameDataNode node)
{
var n = sizeOfCommentNode(node);
if (n > 10)
{
framePos = set_4_byte_value(frame, framePos, ID_COMMENT);
framePos = set_4_byte_value(frame, framePos, n - 10);
frame[framePos++] = 0;
frame[framePos++] = 0;
frame[framePos++] = node.txt.enc == 1 ? (sbyte)1 : (sbyte)0;
frame[framePos++] = (sbyte)node.lng[0];
frame[framePos++] = (sbyte)node.lng[1];
frame[framePos++] = (sbyte)node.lng[2];
if (node.dsc.enc != 1)
{
framePos = writeChars(frame, framePos, node.dsc.l, 0, node.dsc.dim);
frame[framePos++] = 0;
}
else
{
framePos = writeUcs2s(frame, framePos, node.dsc.l, 0, node.dsc.dim);
frame[framePos++] = 0;
frame[framePos++] = 0;
}
if (node.txt.enc != 1)
{
framePos = writeChars(frame, framePos, node.txt.l, 0, node.txt.dim);
}
else
{
framePos = writeUcs2s(frame, framePos, node.txt.l, 0, node.txt.dim);
}
}
return(framePos);
}
private int set_frame_custom2(sbyte[] frame, int framePos, FrameDataNode node)
{
var n = sizeOfNode(node);
if (n > 10)
{
framePos = set_4_byte_value(frame, framePos, node.fid);
framePos = set_4_byte_value(frame, framePos, n - 10);
frame[framePos++] = 0;
frame[framePos++] = 0;
frame[framePos++] = node.txt.enc == 1 ? (sbyte)1 : (sbyte)0;
if (node.txt.enc != 1)
{
framePos = writeChars(frame, framePos, node.txt.l, 0, node.txt.dim);
}
else
{
framePos = writeUcs2s(frame, framePos, node.txt.l, 0, node.txt.dim);
}
}
return(framePos);
}
