Function vaapi_mpeg4_start_frame

libavcodec/vaapi_mpeg4.c:48–140

}

static int vaapi_mpeg4_start_frame(AVCodecContext *avctx,
                                   av_unused const AVBufferRef *buffer_ref,
                                   av_unused const uint8_t *buffer,
                                   av_unused uint32_t size)
{
    Mpeg4DecContext *ctx = avctx->priv_data;
    MPVContext *const s = &ctx->h.c;
    VAAPIDecodePicture *pic = s->cur_pic.ptr->hwaccel_picture_private;
    VAPictureParameterBufferMPEG4 pic_param;
    int i, err;

    pic->output_surface = ff_vaapi_get_surface_id(s->cur_pic.ptr->f);

    pic_param = (VAPictureParameterBufferMPEG4) {
        .vop_width                        = s->width,
        .vop_height                       = s->height,
        .forward_reference_picture        = VA_INVALID_ID,
        .backward_reference_picture       = VA_INVALID_ID,
        .vol_fields.bits = {
            .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
            .chroma_format                = CHROMA_420,
            .interlaced                   = !s->progressive_sequence,
            .obmc_disable                 = 1,
            .sprite_enable                = ctx->vol_sprite_usage,
            .sprite_warping_accuracy      = ctx->sprite_warping_accuracy,
            .quant_type                   = ctx->mpeg_quant,
            .quarter_sample               = s->quarter_sample,
            .data_partitioned             = ctx->h.data_partitioning,
            .reversible_vlc               = ctx->rvlc,
            .resync_marker_disable        = !ctx->resync_marker,
        },
        .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
        .quant_precision                  = ctx->quant_precision,
        .vop_fields.bits = {
            .vop_coding_type              = s->pict_type - AV_PICTURE_TYPE_I,
            .backward_reference_vop_coding_type =
                s->pict_type == AV_PICTURE_TYPE_B ? s->next_pic.ptr->f->pict_type - AV_PICTURE_TYPE_I : 0,
            .vop_rounding_type            = s->no_rounding,
            .intra_dc_vlc_thr             = mpeg4_get_intra_dc_vlc_thr(ctx),
            .top_field_first              = s->top_field_first,
            .alternate_vertical_scan_flag = s->alternate_scan,
        },
        .vop_fcode_forward                = ctx->f_code,
        .vop_fcode_backward               = ctx->b_code,
        .vop_time_increment_resolution    = avctx->framerate.num,
        .num_macroblocks_in_gob           = s->mb_width * H263_GOB_HEIGHT(s->height),
        .num_gobs_in_vop                  =
            (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
        .TRB                              = s->pb_time,
        .TRD                              = s->pp_time,
    };

    for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
        pic_param.sprite_trajectory_du[i]              = ctx->sprite_traj[i][0];
        pic_param.sprite_trajectory_dv[i]              = ctx->sprite_traj[i][1];
    }

    if (s->pict_type == AV_PICTURE_TYPE_B)