h.264 SPS PPS解析源代码，C实现

来源：互联网发布：uc聊天软件下载编辑：程序博客网时间：2024/05/18 01:31
......sps->profile_idc          = get_bits(buf, 8);    sps->constraint_set0_flag = get_1bit(buf);      sps->constraint_set1_flag = get_1bit(buf);      sps->constraint_set2_flag = get_1bit(buf);      sps->constraint_set3_flag = get_1bit(buf);     sps->reserved_zero_4bits  = get_bits(buf, 4);    sps->level_idc            = get_bits(buf, 8);    sps->seq_parameter_set_id = parse_ue(buf);     profile_idc = sps->profile_idc;    if( (profile_idc == 100) || (profile_idc == 110) || (profile_idc == 122) || (profile_idc == 244)    || (profile_idc  == 44) || (profile_idc == 83) || (profile_idc  == 86) || (profile_idc == 118) ||\    (profile_idc == 128))    {        sps->chroma_format_idc = parse_ue(buf);        if(sps->chroma_format_idc == 3)        {            sps->separate_colour_plane_flag = get_1bit(buf);        }        sps->bit_depth_luma_minus8 = parse_ue(buf);        sps->bit_depth_chroma_minus8 = parse_ue(buf);        sps->qpprime_y_zero_transform_bypass_flag = get_1bit(buf);                sps->seq_scaling_matrix_present_flag = get_1bit(buf);        if(sps->seq_scaling_matrix_present_flag)        {            for(i=0; i<((sps->chroma_format_idc != 3)?8:12); i++)            {                sps->seq_scaling_list_present_flag[i] = get_1bit(buf);                if(sps->seq_scaling_list_present_flag[i])                {                    if(i<6)                    {                        for(j=0; j<16; j++)                        {                            last_scale = 8;                            next_scale = 8;                            if(next_scale != 0)                            {                                delta_scale = parse_se(buf);                                next_scale = (last_scale + delta_scale + 256)%256;                                sps->UseDefaultScalingMatrix4x4Flag[i] = ((j == 0) && (next_scale == 0));                            }                            sps->ScalingList4x4[i][j] = (next_scale == 0)?last_scale:next_scale;                            last_scale = sps->ScalingList4x4[i][j];                        }                    }                    else                    {......
其余见下载页
http://download.csdn.net/detail/mantis_1984/7424711