mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-18 15:35:54 +01:00
187 lines
3.7 KiB
C++
187 lines
3.7 KiB
C++
#include "header.h"
|
|
#include "values.h"
|
|
#include "util.h"
|
|
#include <assert.h>
|
|
#include "nu/ByteReader.h"
|
|
#include "nu/ByteWriter.h"
|
|
#include <string.h>
|
|
#include "foundation/error.h"
|
|
|
|
ID3v2::Header::Header()
|
|
{
|
|
marker[0]=0;
|
|
marker[1]=0;
|
|
marker[2]=0;
|
|
version=0;
|
|
revision=0;
|
|
flags=0;
|
|
size=0;
|
|
}
|
|
|
|
ID3v2::Header::Header(uint8_t version, uint8_t revision)
|
|
{
|
|
marker[0]='I';
|
|
marker[1]='D';
|
|
marker[2]='3';
|
|
this->version=version;
|
|
this->revision=revision;
|
|
this->flags=0;
|
|
this->size=0;
|
|
}
|
|
|
|
ID3v2::Header::Header(const void *data)
|
|
{
|
|
Parse(data);
|
|
}
|
|
|
|
|
|
ID3v2::Header::Header(const ID3v2::Header *copy, uint32_t new_size)
|
|
{
|
|
marker[0]=copy->marker[0];
|
|
marker[1]=copy->marker[1];
|
|
marker[2]=copy->marker[2];
|
|
version=copy->version;
|
|
revision=copy->revision;
|
|
flags=copy->flags;
|
|
size = Util::Int32To28(new_size);
|
|
}
|
|
|
|
void ID3v2::Header::Parse(const void *data)
|
|
{
|
|
bytereader_value_t byte_reader;
|
|
bytereader_init(&byte_reader, data, Header::SIZE);
|
|
bytereader_read_n(&byte_reader, &marker, 3);
|
|
version = bytereader_read_u8(&byte_reader);
|
|
revision = bytereader_read_u8(&byte_reader);
|
|
flags = bytereader_read_u8(&byte_reader);
|
|
size = bytereader_read_u32_be(&byte_reader);
|
|
}
|
|
|
|
int ID3v2::Header::Serialize(void *data)
|
|
{
|
|
bytewriter_s byte_writer;
|
|
bytewriter_init(&byte_writer, data, 10);
|
|
bytewriter_write_n(&byte_writer, marker, 3);
|
|
bytewriter_write_u8(&byte_writer, version);
|
|
bytewriter_write_u8(&byte_writer, revision);
|
|
bytewriter_write_u8(&byte_writer, flags);
|
|
bytewriter_write_u32_be(&byte_writer, size);
|
|
return NErr_Success;
|
|
}
|
|
|
|
int ID3v2::Header::SerializeAsHeader(void *data)
|
|
{
|
|
bytewriter_s byte_writer;
|
|
bytewriter_init(&byte_writer, data, 10);
|
|
bytewriter_write_n(&byte_writer, "ID3", 3);
|
|
bytewriter_write_u8(&byte_writer, version);
|
|
bytewriter_write_u8(&byte_writer, revision);
|
|
bytewriter_write_u8(&byte_writer, flags);
|
|
bytewriter_write_u32_be(&byte_writer, size);
|
|
return NErr_Success;
|
|
}
|
|
|
|
int ID3v2::Header::SerializeAsFooter(void *data)
|
|
{
|
|
bytewriter_s byte_writer;
|
|
bytewriter_init(&byte_writer, data, 10);
|
|
bytewriter_write_n(&byte_writer, "3DI", 3);
|
|
bytewriter_write_u8(&byte_writer, version);
|
|
bytewriter_write_u8(&byte_writer, revision);
|
|
bytewriter_write_u8(&byte_writer, flags);
|
|
bytewriter_write_u32_be(&byte_writer, size);
|
|
return NErr_Success;
|
|
}
|
|
|
|
bool ID3v2::Header::Valid() const
|
|
{
|
|
if (marker[0] != 'I'
|
|
|| marker[1] != 'D'
|
|
|| marker[2] != '3')
|
|
return false;
|
|
|
|
if (!Values::KnownVersion(version, revision))
|
|
return false;
|
|
|
|
if (flags & ~Values::ValidHeaderMask(version, revision))
|
|
return false;
|
|
|
|
if (size & 0x80808080)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ID3v2::Header::FooterValid() const
|
|
{
|
|
if (marker[0] != '3'
|
|
|| marker[1] != 'D'
|
|
|| marker[2] != 'I')
|
|
return false;
|
|
|
|
if (!Values::KnownVersion(version, revision))
|
|
return false;
|
|
|
|
if (flags & ~Values::ValidHeaderMask(version, revision))
|
|
return false;
|
|
|
|
if (size & 0x80808080)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t ID3v2::Header::TagSize() const
|
|
{
|
|
uint32_t size = Util::Int28To32(this->size);
|
|
return size;
|
|
}
|
|
|
|
bool ID3v2::Header::HasExtendedHeader() const
|
|
{
|
|
return !!(flags & ID3v2::Values::ExtendedHeaderFlag(version, revision));
|
|
}
|
|
|
|
uint8_t ID3v2::Header::GetVersion() const
|
|
{
|
|
return version;
|
|
}
|
|
|
|
uint8_t ID3v2::Header::GetRevision() const
|
|
{
|
|
return revision;
|
|
}
|
|
|
|
bool ID3v2::Header::Unsynchronised() const
|
|
{
|
|
return !!(flags & (1 << 7));
|
|
}
|
|
|
|
bool ID3v2::Header::HasFooter() const
|
|
{
|
|
if (version < 4)
|
|
return false;
|
|
return !!(flags & 0x10);
|
|
}
|
|
|
|
void ID3v2::Header::ClearExtendedHeader()
|
|
{
|
|
flags &= ~ID3v2::Values::ExtendedHeaderFlag(version, revision);
|
|
}
|
|
|
|
void ID3v2::Header::ClearUnsynchronized()
|
|
{
|
|
flags &= ~(1 << 7);
|
|
}
|
|
|
|
void ID3v2::Header::SetFooter(bool footer)
|
|
{
|
|
if (version >= 4)
|
|
{
|
|
if (footer)
|
|
flags |= 0x10;
|
|
else
|
|
flags &= 0x10;
|
|
}
|
|
}
|