ref: 5857a18ba4498e9bd73e3893ea59d460c5abe8b5
dir: /common/id3lib/src/header_frame.cpp/
// $Id: header_frame.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 <memory.h> #include "header_frame.h" #include "error.h" #include "utils.h" #if defined HAVE_CONFIG_H #include <config.h> #endif void ID3_FrameHeader::SetUnknownFrame(const char* id) { Clear(); __frame_def = new ID3_FrameDef; if (NULL == __frame_def) { // log this; return; } __frame_def->eID = ID3FID_NOFRAME; __frame_def->bTagDiscard = false; __frame_def->bFileDiscard = false; __frame_def->aeFieldDefs = (ID3_FieldDef *) ID3_FieldDef::DEFAULT; if (strlen(id) <= 3) { strcpy(__frame_def->sShortTextID, id); strcpy(__frame_def->sLongTextID, ""); } else { strncpy(__frame_def->sLongTextID, id, 4); strcpy(__frame_def->sShortTextID, ""); } __dyn_frame_def = true; } bool ID3_FrameHeader::SetFrameID(ID3_FrameID id) { if (id == ID3FID_NOFRAME || id == this->GetFrameID()) { return false; } __frame_def = ID3_FindFrameDef(id); __flags.set(TAGALTER, __frame_def->bTagDiscard); __flags.set(FILEALTER, __frame_def->bFileDiscard); __changed = true; return true; } size_t ID3_FrameHeader::Size() const { if (!__info) { return 0; } return __info->frame_bytes_id + __info->frame_bytes_size + __info->frame_bytes_flags; } size_t ID3_FrameHeader::Parse(const uchar *buffer, size_t size) { size_t index = 0; char text_id[5]; if (!__info) { return 0; } strncpy(text_id, (char *) buffer, __info->frame_bytes_id); text_id[__info->frame_bytes_id] = '\0'; index += __info->frame_bytes_id; ID3_FrameID fid = ID3_FindFrameID(text_id); if (ID3FID_NOFRAME == fid) { this->SetUnknownFrame(text_id); } else { this->SetFrameID(fid); } this->SetDataSize(ParseNumber(&buffer[index], __info->frame_bytes_size)); index += __info->frame_bytes_size; __flags.add(ParseNumber(&buffer[index], __info->frame_bytes_flags)); index += __info->frame_bytes_flags; return index; } size_t ID3_FrameHeader::Render(uchar *buffer) const { size_t size = 0; if (NULL == __frame_def) { // TODO: log this return 0; //ID3_THROW(ID3E_InvalidFrameID); } char *text_id; if (__info->frame_bytes_id == strlen(__frame_def->sShortTextID)) { text_id = __frame_def->sShortTextID; } else { text_id = __frame_def->sLongTextID; } memcpy(&buffer[size], (uchar *) text_id, __info->frame_bytes_id); size += __info->frame_bytes_id; size += RenderNumber(&buffer[size], __data_size, __info->frame_bytes_size); size += RenderNumber(&buffer[size], __flags.get(), __info->frame_bytes_flags); return size; } const char* ID3_FrameHeader::GetTextID() const { char *text_id = ""; if (__info && __frame_def) { if (__info->frame_bytes_id == strlen(__frame_def->sShortTextID)) { text_id = __frame_def->sShortTextID; } else { text_id = __frame_def->sLongTextID; } } return text_id; } ID3_FrameHeader& ID3_FrameHeader::operator=(const ID3_FrameHeader& hdr) { if (this != &hdr) { this->Clear(); this->ID3_Header::operator=(hdr); if (!hdr.__dyn_frame_def) { __frame_def = hdr.__frame_def; } else { __frame_def = new ID3_FrameDef; if (NULL == __frame_def) { // TODO: throw something here... } __frame_def->eID = hdr.__frame_def->eID; __frame_def->bTagDiscard = hdr.__frame_def->bTagDiscard; __frame_def->bFileDiscard = hdr.__frame_def->bFileDiscard; __frame_def->aeFieldDefs = hdr.__frame_def->aeFieldDefs; strcpy(__frame_def->sShortTextID, hdr.__frame_def->sShortTextID); strcpy(__frame_def->sLongTextID, hdr.__frame_def->sLongTextID); __dyn_frame_def = true; } } return *this; } ID3_FrameID ID3_FrameHeader::GetFrameID() const { ID3_FrameID eID = ID3FID_NOFRAME; if (NULL != __frame_def) { eID = __frame_def->eID; } return eID; } const ID3_FrameDef *ID3_FrameHeader::GetFrameDef() const { return __frame_def; } bool ID3_FrameHeader::Clear() { bool changed = this->ID3_Header::Clear(); if (__dyn_frame_def) { delete __frame_def; __dyn_frame_def = false; changed = true; } if (__frame_def) { __frame_def = NULL; changed = true; } return changed; }