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00028 #if defined HAVE_CONFIG_H
00029 #include <config.h>
00030 #endif
00031
00032
00033
00034
00035 #include <memory.h>
00036 #include <zlib.h>
00037
00038 #include "tag.h"
00039 #include "frame_impl.h"
00040 #include "id3/io_decorators.h"
00041 #include "io_strings.h"
00042 #include "io_helpers.h"
00043
00044 using namespace dami;
00045
00046 namespace
00047 {
00048 void renderFields(ID3_Writer& writer, const ID3_FrameImpl& frame)
00049 {
00050 ID3_TextEnc enc = ID3TE_ASCII;
00051 for (ID3_FrameImpl::const_iterator fi = frame.begin(); fi != frame.end(); ++fi)
00052 {
00053 ID3_Field* fld = *fi;
00054 if (fld != NULL && fld->InScope(frame.GetSpec()))
00055 {
00056 if (fld->GetID() == ID3FN_TEXTENC)
00057 {
00058 enc = static_cast<ID3_TextEnc>(fld->Get());
00059 ID3D_NOTICE( "id3::v2::renderFields(): found encoding = " << enc );
00060 }
00061 else
00062 {
00063 fld->SetEncoding(enc);
00064 }
00065 fld->Render(writer);
00066 }
00067 }
00068 }
00069 }
00070
00071 void ID3_FrameImpl::Render(ID3_Writer& writer) const
00072 {
00073
00074
00075 if (!this->NumFields())
00076 {
00077 return;
00078 }
00079
00080 ID3_FrameHeader hdr;
00081
00082 const size_t hdr_size = hdr.Size();
00083
00084
00085
00086 String flds;
00087 io::StringWriter fldWriter(flds);
00088 size_t origSize = 0;
00089 if (!this->GetCompression())
00090 {
00091 renderFields(fldWriter, *this);
00092 origSize = flds.size();
00093 ID3D_NOTICE ( "ID3_FrameImpl::Render(): uncompressed fields" );
00094 }
00095 else
00096 {
00097 io::CompressedWriter cr(fldWriter);
00098 renderFields(cr, *this);
00099 cr.flush();
00100 origSize = cr.getOrigSize();
00101 ID3D_NOTICE ( "ID3_FrameImpl::Render(): compressed fields, orig size = " <<
00102 origSize );
00103 }
00104
00105 size_t fldSize = flds.size();
00106 ID3D_NOTICE ( "ID3_FrameImpl::Render(): field size = " << fldSize );
00107
00108
00109
00110
00111
00112
00113
00114
00115
00116 uchar eID = this->GetEncryptionID(), gID = this->GetGroupingID();
00117 ID3_FrameID fid = this->GetID();
00118 if (fid == ID3FID_NOFRAME)
00119 {
00120 const char *tid = this->GetTextID();
00121 hdr.SetUnknownFrame(tid);
00122 }
00123 else
00124 {
00125 hdr.SetFrameID(fid);
00126 }
00127 hdr.SetEncryption(eID > 0);
00128 hdr.SetGrouping(gID > 0);
00129 hdr.SetCompression(origSize > fldSize);
00130 hdr.SetDataSize(fldSize + ((hdr.GetCompression() ? 4 : 0) +
00131 (hdr.GetEncryption() ? 1 : 0) +
00132 (hdr.GetGrouping() ? 1 : 0)));
00133
00134
00135 hdr.Render(writer);
00136
00137 if (fldSize != 0)
00138 {
00139
00140 if (hdr.GetCompression())
00141 {
00142 io::writeBENumber(writer, origSize, sizeof(uint32));
00143 ID3D_NOTICE( "ID3_FrameImpl::Render(): frame is compressed, wrote origSize = " << origSize );
00144 }
00145 if (hdr.GetEncryption())
00146 {
00147 writer.writeChar(eID);
00148 ID3D_NOTICE( "ID3_FrameImpl::Render(): frame is compressed, encryption id = " << eID );
00149 }
00150 if (hdr.GetGrouping())
00151 {
00152 writer.writeChar(gID);
00153 ID3D_NOTICE( "ID3_FrameImpl::Render(): frame is compressed, grouping id = " << gID );
00154 }
00155
00156
00157 writer.writeChars(flds.data(), fldSize);
00158 }
00159 _changed = false;
00160 }
00161