H264Utils.h

#pragma once
 
#include <stddef.h>
#include <tuple>
#include <boost/asio/buffer.hpp>
using boost::asio::const_buffer;
using boost::asio::mutable_buffer;
 
class Frame;
class H264Utils {
private:
    H264Utils(void) {}
public:
        enum H264_NAL_TYPE {
            H264_NAL_TYPE_NON_IDR_SLICE = 1,
            H264_NAL_TYPE_DP_A_SLICE,
            H264_NAL_TYPE_DP_B_SLICE,
            H264_NAL_TYPE_DP_C_SLICE,
            H264_NAL_TYPE_IDR_SLICE,
            H264_NAL_TYPE_SEI,
            H264_NAL_TYPE_SEQ_PARAM,
            H264_NAL_TYPE_PIC_PARAM,
            H264_NAL_TYPE_ACCESS_UNIT,
            H264_NAL_TYPE_END_OF_SEQ,
            H264_NAL_TYPE_END_OF_STREAM,
            H264_NAL_TYPE_FILLER_DATA,
            H264_NAL_TYPE_SEQ_EXTENSION
        };
        static H264_NAL_TYPE getNALUType(const char *buffer);
        static H264_NAL_TYPE getNALUType(Frame *frm);
        static bool getNALUnit(const char *buffer, size_t length, size_t &offset);
        static std::tuple<short, const_buffer, const_buffer> parseNalu(const const_buffer input);
        static H264_NAL_TYPE getNalTypeAfterSpsPps(void* frameData, size_t frameSize);
};