C++ (Cpp) h264_decode_sps Examples

Example #1

File: h264.c Project: IAPark/vlc

static void PutSPS( decoder_t *p_dec, block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    const uint8_t *p_buffer = p_frag->p_buffer;
    size_t i_buffer = p_frag->i_buffer;

    if( !hxxx_strip_AnnexB_startcode( &p_buffer, &i_buffer ) )
    {
        block_Release( p_frag );
        return;
    }

    h264_sequence_parameter_set_t *p_sps = h264_decode_sps( p_buffer, i_buffer, true );
    if( !p_sps )
    {
        msg_Warn( p_dec, "invalid SPS" );
        block_Release( p_frag );
        return;
    }

    /* We have a new SPS */
    if( !p_sys->sps[p_sps->i_id].p_sps )
        msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", p_sps->i_id );

    StoreSPS( p_sys, p_sps->i_id, p_frag, p_sps );
}

Example #2

File: h264.c Project: r1k/vlc

static void PutSPS( decoder_t *p_dec, block_t *p_frag )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    const uint8_t *p_buffer = p_frag->p_buffer;
    size_t i_buffer = p_frag->i_buffer;

    if( !hxxx_strip_AnnexB_startcode( &p_buffer, &i_buffer ) )
        return;

    h264_sequence_parameter_set_t *p_sps = h264_decode_sps( p_buffer, i_buffer, true );
    if( !p_sps )
    {
        msg_Warn( p_dec, "invalid SPS" );
        block_Release( p_frag );
        return;
    }

    p_dec->fmt_out.i_profile = p_sps->i_profile;
    p_dec->fmt_out.i_level = p_sps->i_level;

    (void) h264_get_picture_size( p_sps, &p_dec->fmt_out.video.i_width,
                                         &p_dec->fmt_out.video.i_height,
                                         &p_dec->fmt_out.video.i_visible_width,
                                         &p_dec->fmt_out.video.i_visible_height );

    if( p_sps->vui.i_sar_num != 0 && p_sps->vui.i_sar_den != 0 )
    {
        p_dec->fmt_out.video.i_sar_num = p_sps->vui.i_sar_num;
        p_dec->fmt_out.video.i_sar_den = p_sps->vui.i_sar_den;
    }

    p_sys->i_log2_max_frame_num = p_sps->i_log2_max_frame_num;
    p_sys->b_frame_mbs_only = p_sps->frame_mbs_only_flag;
    p_sys->i_pic_order_cnt_type = p_sps->i_pic_order_cnt_type;
    p_sys->i_delta_pic_order_always_zero_flag = p_sps->i_delta_pic_order_always_zero_flag;
    p_sys->i_log2_max_pic_order_cnt_lsb = p_sps->i_log2_max_pic_order_cnt_lsb;

    if( p_sps->vui.b_valid )
    {
        p_sys->b_timing_info_present_flag = p_sps->vui.b_timing_info_present_flag;
        p_sys->i_num_units_in_tick =  p_sps->vui.i_num_units_in_tick;
        p_sys->i_time_scale = p_sps->vui.i_time_scale;
        p_sys->b_fixed_frame_rate = p_sps->vui.b_fixed_frame_rate;
        p_sys->b_pic_struct_present_flag = p_sps->vui.b_pic_struct_present_flag;
        p_sys->b_cpb_dpb_delays_present_flag = p_sps->vui.b_hrd_parameters_present_flag;
        p_sys->i_cpb_removal_delay_length_minus1 = p_sps->vui.i_cpb_removal_delay_length_minus1;
        p_sys->i_dpb_output_delay_length_minus1 = p_sps->vui.i_dpb_output_delay_length_minus1;

        if( p_sps->vui.b_fixed_frame_rate && !p_dec->fmt_out.video.i_frame_rate_base )
        {
            p_dec->fmt_out.video.i_frame_rate_base = p_sps->vui.i_num_units_in_tick;
            p_dec->fmt_out.video.i_frame_rate = p_sps->vui.i_time_scale >> 1 /* num_clock_ts == 2 */;
        }