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#pragma once
#include "frameheader.h"
#include "nu/PtrDeque.h"
namespace ID3v2
{
class Frame : public nu::PtrDequeNode
{
public:
virtual ~Frame();
int NewData(size_t new_len, void **data, size_t *data_len);
int GetData(const void **data, size_t *data_len) const;
size_t GetDataSize() const;
virtual const int8_t *GetIdentifier() const=0;
virtual unsigned int GetVersion() const=0;
virtual bool Encrypted() const;
virtual bool Compressed() const;
virtual bool Grouped() const;
virtual bool ReadOnly() const;
virtual bool FrameUnsynchronised() const;
virtual bool DataLengthIndicated() const;
virtual bool TagAlterPreservation() const;
virtual bool FileAlterPreservation() const;
protected:
Frame();
void *data;
size_t data_size; /* REAL size, might be different from header.headerData.size */
};
}
namespace ID3v2_2
{
class Frame : public ID3v2::Frame
{
public:
Frame(const ID3v2::Header &_header, const int8_t *id, int flags); // creates an empty frame with a given ID
Frame(const ID3v2_2::FrameHeader &_header);
int Parse(const void *_data, size_t len, size_t *read);
int SerializedSize(uint32_t *length, const ID3v2::Header &tag_header, int flags) const;
// there is enough room guaranteed to be present because it will be checked with SerializedSize()
int Serialize(void *data, uint32_t *written, const ID3v2::Header &tag_header, int flags) const;
const int8_t *GetIdentifier() const;
unsigned int GetVersion() const { return 2; }
private:
ID3v2_2::FrameHeader header;
};
}
namespace ID3v2_3
{
class Frame : public ID3v2::Frame
{
public:
Frame(const ID3v2::Header &_header, const int8_t *id, int flags); // creates an empty frame with a given ID
Frame(const ID3v2_3::FrameHeader &_header);
int Parse(const void *_data, size_t len, size_t *read);
int SerializedSize(uint32_t *length, const ID3v2::Header &tag_header, int flags) const;
// there is enough room guaranteed to be present because it will be checked with SerializedSize()
int Serialize(void *data, uint32_t *written, const ID3v2::Header &tag_header, int flags) const;
const int8_t *GetIdentifier() const;
unsigned int GetVersion() const { return 3; }
virtual bool Encrypted() const;
virtual bool Compressed() const;
virtual bool Grouped() const;
virtual bool ReadOnly() const;
virtual bool TagAlterPreservation() const;
virtual bool FileAlterPreservation() const;
private:
ID3v2_3::FrameHeader header;
uint8_t group_identity;
/* helper function
reads num_bytes from input into output, dealing with re-synchronization and length checking
increments bytes_read value by number of input bytes read (different from num_bytes when data is unsynchronized
decrements input_len by bytes read
decrements output_len by bytes written
*/
bool ReadData(void *output, const void *&input, size_t &input_len, size_t &frame_len, size_t num_bytes, size_t *bytes_read) const;
};
}
namespace ID3v2_4
{
class Frame : public ID3v2::Frame
{
public:
Frame(const ID3v2::Header &_header, const int8_t *id, int flags); // creates an empty frame with a given ID
Frame(const ID3v2_4::FrameHeader &_header);
int Parse(const void *_data, size_t len, size_t *read);
int SerializedSize(uint32_t *length, const ID3v2::Header &tag_header, int flags) const;
int Serialize(void *data, uint32_t *written, const ID3v2::Header &tag_header, int flags) const;
const int8_t *GetIdentifier() const;
unsigned int GetVersion() const { return 4; }
virtual bool Encrypted() const;
virtual bool Compressed() const;
virtual bool Grouped() const;
virtual bool ReadOnly() const;
virtual bool FrameUnsynchronised() const;
virtual bool DataLengthIndicated() const;
virtual bool TagAlterPreservation() const;
virtual bool FileAlterPreservation() const;
private:
ID3v2_4::FrameHeader header;
uint8_t group_identity;
/* helper function
reads num_bytes from input into output, dealing with re-synchronization and length checking
increments bytes_read value by number of input bytes read (different from num_bytes when data is unsynchronized
decrements input_len by bytes read
decrements output_len by bytes written
*/
bool ReadData(void *output, const void *&input, size_t &input_len, size_t &frame_len, size_t num_bytes, size_t *bytes_read) const;
};
}
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