H265 seq 参数集数据语法 table 需要

Question

我一直在寻找 H265 的 seq 参数集语法 table 很长时间，但找不到。我有 H264 语法 table，我用它来解析 h264 文件并且工作正常。我正在尝试对 H265 视频文件做同样的事情以获得分辨率。我有解析器，我从中导出了我的版本-> 供参考 https://github.com/virinext/hevcesbrowser

注意：使用 Hevcbrowser 源我可以看到并理解值和类型，但我没有得到相同的所以语法 table 会有所帮助

需要知道 H265 的 Ue U 或 Se 等类型及其值 .详情请参考此图片 Table of H264 Sps parameter syntax

int32_t CtbLog2SizeY = m_spsMap[spsId] -> log2_min_luma_coding_block_size_minus3 + 3 + m_spsMap[spsId] -> log2_diff_max_min_luma_coding_block_size;
uint32_t CtbSizeY = 1 << CtbLog2SizeY;
uint32_t PicWidthInCtbsY = m_spsMap[spsId] -> pic_width_in_luma_samples / CtbSizeY;

我希望 PicWidthInCtbsY 为 640

    int h265_parser_sps(unsigned char * buffer, unsigned int bufferlen, int *width,int * height)
{
    unsigned int StartBit=0;
    de_emulation_prevention(buffer,&bufferlen);

    uint32_t    sps_video_parameter_set_id = 0;
    uint32_t    sps_max_sub_layers_minus1 = 0;
    bool        sps_temporal_id_nesting_flag;
    uint32_t    sps_seq_parameter_set_id = 0;
    uint32_t    chroma_format_idc;
    bool        separate_colour_plane_flag = false;
    uint32_t    pic_width_in_luma_samples=0;
    uint32_t    pic_height_in_luma_samples=0;
    bool        conformance_window_flag;
    uint32_t    conf_win_left_offset;
    uint32_t    conf_win_right_offset;
    uint32_t    conf_win_top_offset;
    uint32_t    conf_win_bottom_offset;
    uint32_t    bit_depth_luma_minus8;
    uint32_t    bit_depth_chroma_minus8;
    uint32_t    log2_max_pic_order_cnt_lsb_minus4;
    bool        sps_sub_layer_ordering_info_present_flag;
    bool        rbsp_stop_one_bit;

    u(16,buffer,StartBit);//nal_unit_header
    sps_video_parameter_set_id      = u(4,buffer,StartBit);
    sps_max_sub_layers_minus1       = u(3,buffer,StartBit);
    sps_temporal_id_nesting_flag    = u(1,buffer,StartBit);
    cout<<"sps_video_parameter_set_id:"<<sps_video_parameter_set_id<<endl;
    cout<<"sps_max_sub_layers_minus1:"<<sps_max_sub_layers_minus1<<endl;
    cout<<"sps_temporal_id_nesting_flag:"<<sps_temporal_id_nesting_flag<<endl;

    h265_parse_ptl(sps_max_sub_layers_minus1,buffer,StartBit,bufferlen);

    sps_seq_parameter_set_id    = Ue(buffer,bufferlen,StartBit);
    cout<<"sps_seq_parameter_set_id:"<<sps_seq_parameter_set_id<<endl;

    //p_sps = &sps[sps_seq_parameter_set_id];

    chroma_format_idc           = Ue(buffer,bufferlen,StartBit);
    cout<<"chroma_format_idc:"<<chroma_format_idc<<endl;

    if (3 == chroma_format_idc)
    {
        separate_colour_plane_flag = u(1,buffer,StartBit);
    }
    else
        separate_colour_plane_flag = 0;
    cout<<"separate_colour_plane_flag:"<<separate_colour_plane_flag<<endl;

    pic_width_in_luma_samples   = Ue(buffer,bufferlen,StartBit);
    pic_height_in_luma_samples  = Ue(buffer,bufferlen,StartBit);
    cout<<"pic_width_in_luma_samples:"<<pic_width_in_luma_samples<<endl;
    cout<<"pic_height_in_luma_samples:"<<pic_height_in_luma_samples<<endl;
    *width=pic_width_in_luma_samples;
    *height=pic_height_in_luma_samples;


    conformance_window_flag = u(1,buffer,StartBit);
    cout<<"conformance_window_flag:"<<conformance_window_flag<<endl;

    if (conformance_window_flag)
    {
        conf_win_left_offset    = Ue(buffer,bufferlen,StartBit);
        conf_win_right_offset   = Ue(buffer,bufferlen,StartBit);
        conf_win_top_offset     = Ue(buffer,bufferlen,StartBit);
        conf_win_bottom_offset  = Ue(buffer,bufferlen,StartBit);
    }

    bit_depth_luma_minus8               = Ue(buffer,bufferlen,StartBit);
    bit_depth_chroma_minus8             = Ue(buffer,bufferlen,StartBit);
    log2_max_pic_order_cnt_lsb_minus4   = Ue(buffer,bufferlen,StartBit);
    cout<<"bit_depth_luma_minus8:"<<bit_depth_luma_minus8<<endl;
    cout<<"bit_depth_chroma_minus8:"<<bit_depth_chroma_minus8<<endl;
    cout<<"log2_max_pic_order_cnt_lsb_minus4:"<<log2_max_pic_order_cnt_lsb_minus4<<endl;

    sps_sub_layer_ordering_info_present_flag = u(1,buffer,StartBit);
    cout<<"sps_sub_layer_ordering_info_present_flag:"<<sps_sub_layer_ordering_info_present_flag<<endl;

    int i;
    uint32_t *sps_max_dec_pic_buffering_minus1   = new uint32_t[sps_max_sub_layers_minus1 + 1];
    uint32_t *sps_max_num_reorder_pics           = new uint32_t[sps_max_sub_layers_minus1 + 1];
    uint32_t *sps_max_latency_increase_plus1     = new uint32_t[sps_max_sub_layers_minus1 + 1];

    for (i = (sps_sub_layer_ordering_info_present_flag ? 0 : sps_max_sub_layers_minus1); i <= sps_max_sub_layers_minus1; i++ )
    {
        sps_max_dec_pic_buffering_minus1[i] = Ue(buffer,bufferlen,StartBit);
        sps_max_num_reorder_pics[i]         = Ue(buffer,bufferlen,StartBit);
        sps_max_latency_increase_plus1[i]   = Ue(buffer,bufferlen,StartBit);
    }

    uint32_t log2_min_luma_coding_block_size_minus3;
    uint32_t log2_diff_max_min_luma_coding_block_size;
    uint32_t log2_min_transform_block_size_minus2;
    uint32_t log2_diff_max_min_transform_block_size;
    uint32_t max_transform_hierarchy_depth_inter;
    uint32_t max_transform_hierarchy_depth_intra;
    bool     scaling_list_enabled_flag;

    log2_min_luma_coding_block_size_minus3      = Ue(buffer,bufferlen,StartBit);
    log2_diff_max_min_luma_coding_block_size    = Ue(buffer,bufferlen,StartBit);
    log2_min_transform_block_size_minus2        = Ue(buffer,bufferlen,StartBit);
    log2_diff_max_min_transform_block_size      = Ue(buffer,bufferlen,StartBit);
    max_transform_hierarchy_depth_inter         = Ue(buffer,bufferlen,StartBit);
    max_transform_hierarchy_depth_intra         = Ue(buffer,bufferlen,StartBit);
    scaling_list_enabled_flag                   = u(1,buffer,StartBit);

Answer 1

你只需要H.265/HEVC的规范文档，你可以找到here。显然这是一份相当长的文件。你应该寻找正确的 table.

H265 seq 参数集数据语法 table 需要

H265 seq parameter set data Syntax table required

parsing

video-streaming

video-processing

hevc