ref: db2d1012adc7c9391f08aa77a2f05e7beee7548b
dir: /common/id3lib/src/misc_support.cpp/
// $Id: misc_support.cpp,v 1.1 2002/01/21 08:16:22 menno Exp $
// id3lib: a C++ library for creating and manipulating id3v1/v2 tags
// Copyright 1999, 2000 Scott Thomas Haug
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
// License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// The id3lib authors encourage improvements and optimisations to be sent to
// the id3lib coordinator. Please see the README file for details on where to
// send such submissions. See the AUTHORS file for a list of people who have
// contributed to id3lib. See the ChangeLog file for a list of changes to
// id3lib. These files are distributed with id3lib at
// http://download.sourceforge.net/id3lib/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include "misc_support.h"
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
char *ID3_GetString(const ID3_Frame *frame, ID3_FieldID fldName, size_t nIndex)
{
char *sText = NULL;
if (NULL != frame)
{
size_t nText = frame->Field(fldName).Size();
sText = new char[nText + 1];
try
{
frame->Field(fldName).Get(sText, nText, nIndex);
}
catch (ID3_Err&)
{
delete [] sText;
return NULL;
}
sText[nText] = '\0';
}
return sText;
}
char *ID3_GetArtist(const ID3_Tag *tag)
{
char *sArtist = NULL;
if (NULL == tag)
{
return sArtist;
}
ID3_Frame *pFrame = NULL;
if ((pFrame = tag->Find(ID3FID_LEADARTIST)) ||
(pFrame = tag->Find(ID3FID_BAND)) ||
(pFrame = tag->Find(ID3FID_CONDUCTOR)) ||
(pFrame = tag->Find(ID3FID_COMPOSER)))
{
sArtist = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sArtist;
}
ID3_Frame* ID3_AddArtist(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && NULL != text && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveArtists(tag);
}
if (bReplace ||
(tag->Find(ID3FID_LEADARTIST) == NULL &&
tag->Find(ID3FID_BAND) == NULL &&
tag->Find(ID3FID_CONDUCTOR) == NULL &&
tag->Find(ID3FID_COMPOSER) == NULL))
{
pFrame = new ID3_Frame(ID3FID_LEADARTIST);
if (pFrame)
{
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveArtists(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_LEADARTIST)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
while ((pFrame = tag->Find(ID3FID_BAND)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
while ((pFrame = tag->Find(ID3FID_CONDUCTOR)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
while ((pFrame = tag->Find(ID3FID_COMPOSER)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetAlbum(const ID3_Tag *tag)
{
char *sAlbum = NULL;
if (NULL == tag)
{
return sAlbum;
}
ID3_Frame *pFrame = tag->Find(ID3FID_ALBUM);
if (pFrame != NULL)
{
sAlbum = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sAlbum;
}
ID3_Frame* ID3_AddAlbum(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && NULL != text && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveAlbums(tag);
}
if (bReplace || tag->Find(ID3FID_ALBUM) == NULL)
{
pFrame = new ID3_Frame(ID3FID_ALBUM);
if (pFrame)
{
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveAlbums(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_ALBUM)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetTitle(const ID3_Tag *tag)
{
char *sTitle = NULL;
if (NULL == tag)
{
return sTitle;
}
ID3_Frame *pFrame = tag->Find(ID3FID_TITLE);
if (pFrame != NULL)
{
sTitle = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sTitle;
}
ID3_Frame* ID3_AddTitle(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && NULL != text && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveTitles(tag);
}
if (bReplace || tag->Find(ID3FID_TITLE) == NULL)
{
pFrame = new ID3_Frame(ID3FID_TITLE);
if (pFrame)
{
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveTitles(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_TITLE)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetYear(const ID3_Tag *tag)
{
char *sYear = NULL;
if (NULL == tag)
{
return sYear;
}
ID3_Frame *pFrame = tag->Find(ID3FID_YEAR);
if (pFrame != NULL)
{
sYear = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sYear;
}
ID3_Frame* ID3_AddYear(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && NULL != text && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveYears(tag);
}
if (bReplace || tag->Find(ID3FID_YEAR) == NULL)
{
pFrame = new ID3_Frame(ID3FID_YEAR);
if (NULL != pFrame)
{
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveYears(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_YEAR)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetComment(const ID3_Tag *tag)
{
char *sComment = NULL;
if (NULL == tag)
{
return sComment;
}
ID3_Frame *pFrame = tag->Find(ID3FID_COMMENT);
if (pFrame != NULL)
{
sComment = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sComment;
}
ID3_Frame* ID3_AddComment(ID3_Tag *tag, const char *sComment,
const char *sDescription, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag &&
NULL != sComment &&
NULL != sDescription &&
strlen(sComment) > 0)
{
bool bAdd = true;
if (bReplace)
{
ID3_RemoveComments(tag, sDescription);
}
else
{
// See if there is already a comment with this description
for (size_t nCount = 0; nCount < tag->NumFrames(); nCount++)
{
pFrame = tag->GetFrameNum(nCount);
if (pFrame->GetID() == ID3FID_COMMENT)
{
char *sDesc = ID3_GetString(pFrame, ID3FN_DESCRIPTION);
if (strcmp(sDesc, sDescription) == 0)
{
bAdd = false;
}
delete [] sDesc;
if (!bAdd)
{
break;
}
}
}
}
if (bAdd)
{
pFrame = new ID3_Frame(ID3FID_COMMENT);
if (NULL != pFrame)
{
pFrame->Field(ID3FN_LANGUAGE) = "eng";
pFrame->Field(ID3FN_DESCRIPTION) = sDescription;
pFrame->Field(ID3FN_TEXT) = sComment;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
// Remove all comments with the given description (remove all comments if
// sDescription is NULL)
size_t ID3_RemoveComments(ID3_Tag *tag, const char *sDescription)
{
size_t nRemoved = 0;
if (NULL == tag)
{
return nRemoved;
}
for (size_t nCount = 0; nCount < tag->NumFrames(); nCount++)
{
ID3_Frame *pFrame = tag->GetFrameNum(nCount);
if (pFrame->GetID() == ID3FID_COMMENT)
{
bool bRemove = false;
// A null description means remove all comments
if (NULL == sDescription)
{
bRemove = true;
}
else
{
// See if the description we have matches the description of the
// current comment. If so, set the "remove the comment" flag to true.
char *sDesc = ID3_GetString(pFrame, ID3FN_DESCRIPTION);
if (strcmp(sDesc, sDescription) == 0)
{
bRemove = true;
}
delete [] sDesc;
}
if (bRemove)
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
}
}
return nRemoved;
}
char *ID3_GetTrack(const ID3_Tag *tag)
{
char *sTrack = NULL;
if (NULL == tag)
{
return sTrack;
}
ID3_Frame *pFrame = tag->Find(ID3FID_TRACKNUM);
if (pFrame != NULL)
{
sTrack = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sTrack;
}
size_t ID3_GetTrackNum(const ID3_Tag *tag)
{
char *sTrack = ID3_GetTrack(tag);
size_t nTrack = 0;
if (NULL != sTrack)
{
nTrack = atoi(sTrack);
delete [] sTrack;
}
return nTrack;
}
ID3_Frame* ID3_AddTrack(ID3_Tag *tag, uchar ucTrack, uchar ucTotal, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && ucTrack > 0)
{
if (bReplace)
{
ID3_RemoveTracks(tag);
}
if (bReplace || NULL == tag->Find(ID3FID_TRACKNUM))
{
ID3_Frame *trackFrame = new ID3_Frame(ID3FID_TRACKNUM);
if (trackFrame)
{
char *sTrack = NULL;
if (0 == ucTotal)
{
sTrack = new char[4];
sprintf(sTrack, "%lu", (luint) ucTrack);
}
else
{
sTrack = new char[8];
sprintf(sTrack, "%lu/%lu", (luint) ucTrack, (luint) ucTotal);
}
trackFrame->Field(ID3FN_TEXT) = sTrack;
tag->AttachFrame(trackFrame);
delete [] sTrack;
}
}
}
return pFrame;
}
size_t ID3_RemoveTracks(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_TRACKNUM)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetGenre(const ID3_Tag *tag)
{
char *sGenre = NULL;
if (NULL == tag)
{
return sGenre;
}
ID3_Frame *pFrame = tag->Find(ID3FID_CONTENTTYPE);
if (pFrame != NULL)
{
sGenre = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sGenre;
}
size_t ID3_GetGenreNum(const ID3_Tag *tag)
{
char *sGenre = ID3_GetGenre(tag);
size_t ulGenre = 0xFF;
if (NULL == sGenre)
{
return ulGenre;
}
// If the genre string begins with "(ddd)", where "ddd" is a number, then
// "ddd" is the genre number---get it
if (sGenre[0] == '(')
{
char *pCur = &sGenre[1];
while (isdigit(*pCur))
{
pCur++;
}
if (*pCur == ')')
{
// if the genre number is greater than 255, its invalid.
ulGenre = MIN(0xFF, atoi(&sGenre[1]));
}
}
delete [] sGenre;
return ulGenre;
}
ID3_Frame* ID3_AddGenre(ID3_Tag *tag, size_t ucGenre, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && 0xFF != ucGenre)
{
if (bReplace)
{
ID3_RemoveGenres(tag);
}
if (bReplace || NULL == tag->Find(ID3FID_CONTENTTYPE))
{
pFrame = new ID3_Frame(ID3FID_CONTENTTYPE);
if (NULL != pFrame)
{
char sGenre[6];
sprintf(sGenre, "(%lu)", (luint) ucGenre);
pFrame->Field(ID3FN_TEXT) = sGenre;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveGenres(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_CONTENTTYPE)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetLyrics(const ID3_Tag *tag)
{
char *sLyrics = NULL;
if (NULL == tag)
{
return sLyrics;
}
ID3_Frame *pFrame = tag->Find(ID3FID_UNSYNCEDLYRICS);
if (pFrame != NULL)
{
sLyrics = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sLyrics;
}
ID3_Frame* ID3_AddLyrics(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveLyrics(tag);
}
if (bReplace || tag->Find(ID3FID_UNSYNCEDLYRICS) == NULL)
{
pFrame = new ID3_Frame(ID3FID_UNSYNCEDLYRICS);
if (NULL != pFrame)
{
pFrame->Field(ID3FN_LANGUAGE) = "eng";
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveLyrics(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_UNSYNCEDLYRICS)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
char *ID3_GetLyricist(const ID3_Tag *tag)
{
char *sLyricist = NULL;
if (NULL == tag)
{
return sLyricist;
}
ID3_Frame *pFrame = tag->Find(ID3FID_LYRICIST);
if (pFrame != NULL)
{
sLyricist = ID3_GetString(pFrame, ID3FN_TEXT);
}
return sLyricist;
}
ID3_Frame* ID3_AddLyricist(ID3_Tag *tag, const char *text, bool bReplace)
{
ID3_Frame* pFrame = NULL;
if (NULL != tag && NULL != text && strlen(text) > 0)
{
if (bReplace)
{
ID3_RemoveLyricist(tag);
}
if (bReplace || (tag->Find(ID3FID_LYRICIST) == NULL))
{
pFrame = new ID3_Frame(ID3FID_LYRICIST);
if (pFrame)
{
pFrame->Field(ID3FN_TEXT) = text;
tag->AttachFrame(pFrame);
}
}
}
return pFrame;
}
size_t ID3_RemoveLyricist(ID3_Tag *tag)
{
size_t nRemoved = 0;
ID3_Frame *pFrame = NULL;
if (NULL == tag)
{
return nRemoved;
}
while ((pFrame = tag->Find(ID3FID_LYRICIST)))
{
tag->RemoveFrame(pFrame);
nRemoved++;
}
return nRemoved;
}
ID3_Frame* ID3_AddSyncLyrics(ID3_Tag *tag, const char *lang, const char *desc,
const uchar *text, size_t textsize, bool bReplace)
{
ID3_Frame* pFrame = NULL;
// language and descriptor should be mandatory
if ((NULL == lang) || (NULL == desc))
{
return NULL;
}
// check if a SYLT frame of this language or descriptor already exists
ID3_Frame* pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_LANGUAGE,
(char *) lang);
if (!pFrameExist)
{
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_DESCRIPTION,
(char *) desc);
}
if (NULL != tag && NULL != text)
{
if (bReplace && pFrameExist)
{
tag->RemoveFrame (pFrameExist);
pFrameExist = NULL;
}
// if the frame still exist, cannot continue
if (pFrameExist)
{
return NULL;
}
ID3_Frame* pFrame = new ID3_Frame(ID3FID_SYNCEDLYRICS);
if (NULL == pFrame)
{
ID3_THROW(ID3E_NoMemory);
}
pFrame->Field(ID3FN_LANGUAGE) = lang;
pFrame->Field(ID3FN_DESCRIPTION) = desc;
pFrame->Field(ID3FN_DATA).Set(text, textsize);
tag->AttachFrame(pFrame);
}
return pFrame;
}
ID3_Frame *ID3_GetSyncLyricsInfo(const ID3_Tag *tag, const char *lang,
const char *desc, size_t& stampformat,
size_t& type, size_t& size)
{
// check if a SYLT frame of this language or descriptor exists
ID3_Frame* pFrameExist = NULL;
if (NULL != lang)
{
// search through language
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_LANGUAGE, lang);
}
else if (NULL != desc)
{
// search through descriptor
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_DESCRIPTION, desc);
}
else
{
// both language and description not specified, search the first SYLT frame
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS);
}
if (!pFrameExist)
{
return NULL;
}
// get the lyrics time stamp format
stampformat = pFrameExist->Field (ID3FN_TIMESTAMPFORMAT).Get ();
// get the lyrics content type
type = pFrameExist->Field (ID3FN_CONTENTTYPE).Get ();
// get the lyrics size
size = pFrameExist->Field (ID3FN_DATA).Size ();
// return the frame pointer for further uses
return pFrameExist;
}
ID3_Frame *ID3_GetSyncLyrics(const ID3_Tag *tag, const char *lang,
const char *desc, const uchar *pData, size_t& size)
{
// check if a SYLT frame of this language or descriptor exists
ID3_Frame* pFrameExist = NULL;
if (NULL != lang)
{
// search through language
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_LANGUAGE, lang);
}
else if (NULL != desc)
{
// search through descriptor
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS, ID3FN_DESCRIPTION, desc);
}
else
{
// both language and description not specified, search the first SYLT frame
pFrameExist = tag->Find(ID3FID_SYNCEDLYRICS);
}
if (NULL == pFrameExist)
{
return NULL;
}
// get the lyrics size
size_t datasize = pFrameExist->Field(ID3FN_DATA).Size();
size = MIN(size, datasize);
// get the lyrics data
pData = pFrameExist->Field (ID3FN_DATA).GetBinary();
// return the frame pointer for further uses
return pFrameExist;
}