packet.h

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#pragma once
 
#include "avcompat.h"
 
#include <vector>
#include <type_traits>
 
#if AVCPP_CXX_STANDARD >= 20
#include <span>
#endif
 
#include "ffmpeg.h"
#include "avutils.h"
#include "rational.h"
#include "stream.h"
#include "averror.h"
#include "timestamp.h"
 
extern "C" {
#include <libavutil/attributes.h>
}
 
namespace av {
 
#if AVCPP_HAS_PKT_SIDE_DATA
class PacketSideData : public FFWrapperRef<AVPacketSideData>
{
public:
    using FFWrapperRef<AVPacketSideData>::FFWrapperRef;
 
    std::string_view name() const noexcept;
    AVPacketSideDataType type() const noexcept;
    std::span<const uint8_t> span() const noexcept;
    std::span<uint8_t> span() noexcept;
 
    static std::string_view name(AVPacketSideDataType type);
 
    bool empty() const noexcept;
    operator bool() const noexcept;
};
#endif // AVCPP_HAS_PKT_SIDE_DATA
 
class Packet :
#if AVCPP_API_AVCODEC_NEW_INIT_PACKET
    public FFWrapperPtr<AVPacket>
#else
    public FFWrapperRef<AVPacket>
#endif
{
private:
    // if deepCopy true - make deep copy, instead - reference is created
    void initFromAVPacket(const AVPacket *avpacket, bool deepCopy, OptionalErrorCode ec);
 
public:
    struct wrap_data {};
    struct wrap_data_static {};
 
    Packet();
    Packet(const Packet &packet, OptionalErrorCode ec);
    Packet(const Packet &packet);
    Packet(Packet &&packet);
    explicit Packet(const AVPacket *packet, OptionalErrorCode ec = throws());
    explicit Packet(const std::vector<uint8_t> &data);
 
    Packet(const uint8_t *data, size_t size, bool doAllign = true);
    // data must be allocated with av_malloc() family
    Packet(uint8_t *data, size_t size, wrap_data, OptionalErrorCode ec = throws());
    Packet(uint8_t *data, size_t size, wrap_data_static, OptionalErrorCode ec = throws());
 
#if AVCPP_CXX_STANDARD >= 20
    explicit Packet(std::span<const uint8_t> data, bool doAllign = true);
    // data must be allocated with av_malloc() family
    Packet(std::span<uint8_t> data, wrap_data, OptionalErrorCode ec = throws());
    Packet(std::span<uint8_t> data, wrap_data_static, OptionalErrorCode ec = throws());
#endif
 
    ~Packet();
 
    bool setData(const std::vector<uint8_t> &newData, OptionalErrorCode ec = throws());
    bool setData(const uint8_t *newData, size_t size, OptionalErrorCode ec = throws());
 
    const uint8_t* data() const;
    uint8_t*       data();
 
#if AVCPP_CXX_STANDARD >= 20
    bool setData(std::span<const uint8_t> newData, OptionalErrorCode ec = throws());
    std::span<const uint8_t> span() const;
    std::span<uint8_t> span();
#endif
 
    Timestamp pts() const;
    Timestamp dts() const;
    Timestamp ts() const;
    size_t size() const;
 
    attribute_deprecated void setPts(int64_t pts,     const Rational &tsTimeBase = Rational(0, 0));
    attribute_deprecated void setDts(int64_t dts,     const Rational &tsTimeBase = Rational(0, 0));
 
    void setPts(const Timestamp &pts);
    void setDts(const Timestamp &dts);
 
    int     streamIndex() const;
    bool    isKeyPacket() const;
    int     duration() const;
    bool    isComplete() const;
    bool    isNull() const;
 
    void    setStreamIndex(int idx);
    void    setKeyPacket(bool keyPacket);
    void    setDuration(int duration, const Rational &durationTimeBase = Rational(0, 0));
    void    setComplete(bool complete);
 
    // Flags
    int         flags() const;
    void        setFlags(int flags);
    void        addFlags(int flags);
    void        clearFlags(int flags);
 
#if AVCPP_HAS_AVFORMAT
    void        dump(const Stream & st, bool dumpPayload = false) const;
#endif // if AVCPP_HAS_AVFORMAT
 
    const Rational& timeBase() const { return m_timeBase; }
    void setTimeBase(const Rational &value);
 
#if AVCPP_HAS_PKT_SIDE_DATA
    std::span<const uint8_t> sideData(AVPacketSideDataType type) const;
    std::span<uint8_t>       sideData(AVPacketSideDataType type);
 
    std::size_t sideDataCount() const noexcept;
 
    PacketSideData sideDataIndex(std::size_t index) noexcept;
 
    ArrayView<AVPacketSideData, PacketSideData, std::size_t> sideData() noexcept;
    ArrayView<const AVPacketSideData, PacketSideData, std::size_t> sideData() const noexcept;
 
    void freeSideData() noexcept;
 
    void addSideData(AVPacketSideDataType type, std::span<const uint8_t> data, OptionalErrorCode ec = throws());
 
    void addSideData(AVPacketSideDataType type, std::span<uint8_t> data, wrap_data, OptionalErrorCode ec = throws());
 
    std::span<uint8_t> allocateSideData(AVPacketSideDataType type, std::size_t size, OptionalErrorCode ec = throws());
#endif
 
    bool     isReferenced() const;
    int      refCount() const;
 
#if AVCPP_API_AVCODEC_NEW_INIT_PACKET
    AVPacket* makeRef(OptionalErrorCode ec) const;
#else
    AVPacket makeRef(OptionalErrorCode ec = throws()) const;
#endif
 
    Packet   clone(OptionalErrorCode ec = throws()) const;
 
    Packet &operator=(const Packet &rhs);
    Packet &operator=(Packet &&rhs);
 
#if AVCPP_API_AVCODEC_NEW_INIT_PACKET
    Packet &operator=(const AVPacket *rhs);
#else
    Packet &operator=(const AVPacket &rhs);
#endif
 
    void swap(Packet &other);
 
    operator bool() const { return isComplete(); }
 
private:
    bool     m_completeFlag;
    Rational m_timeBase;
};
 
 
 
} // ::av