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