/** Decode the given H.264 slice with VA API. */
static int decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
H264Context * const h = avctx->priv_data;
MpegEncContext * const s = &h->s;
VASliceParameterBufferH264 *slice_param;
av_dlog(avctx, "decode_slice(): buffer %p, size %d\n", buffer, size);
/* Fill in VASliceParameterBufferH264. */
slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
if (!slice_param)
return -1;
slice_param->slice_data_bit_offset = get_bits_count(&h->s.gb) + 8; /* bit buffer started beyond nal_unit_type */
slice_param->first_mb_in_slice = (s->mb_y >> FIELD_OR_MBAFF_PICTURE) * s->mb_width + s->mb_x;
slice_param->slice_type = ff_h264_get_slice_type(h);
slice_param->direct_spatial_mv_pred_flag = h->slice_type == AV_PICTURE_TYPE_B ? h->direct_spatial_mv_pred : 0;
slice_param->num_ref_idx_l0_active_minus1 = h->list_count > 0 ? h->ref_count[0] - 1 : 0;
slice_param->num_ref_idx_l1_active_minus1 = h->list_count > 1 ? h->ref_count[1] - 1 : 0;
slice_param->cabac_init_idc = h->cabac_init_idc;
slice_param->slice_qp_delta = s->qscale - h->pps.init_qp;
slice_param->disable_deblocking_filter_idc = h->deblocking_filter < 2 ? !h->deblocking_filter : h->deblocking_filter;
slice_param->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26;
slice_param->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26;
slice_param->luma_log2_weight_denom = h->luma_log2_weight_denom;
slice_param->chroma_log2_weight_denom = h->chroma_log2_weight_denom;
fill_vaapi_RefPicList(slice_param->RefPicList0, h->ref_list[0], h->list_count > 0 ? h->ref_count[0] : 0);
fill_vaapi_RefPicList(slice_param->RefPicList1, h->ref_list[1], h->list_count > 1 ? h->ref_count[1] : 0);
fill_vaapi_plain_pred_weight_table(h, 0,
&slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0,
&slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0);
fill_vaapi_plain_pred_weight_table(h, 1,
&slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1,
&slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1);
return 0;
}
/** Decode the given H.264 slice with VA API. */
static int vaapi_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
FFVAContext * const vactx = ff_vaapi_get_context(avctx);
H264Context * const h = avctx->priv_data;
H264SliceContext *sl = &h->slice_ctx[0];
VASliceParameterBufferH264 *slice_param;
/* Fill in VASliceParameterBufferH264. */
slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(vactx, buffer, size);
if (!slice_param)
return -1;
slice_param->slice_data_bit_offset = get_bits_count(&sl->gb);
slice_param->first_mb_in_slice = (sl->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + sl->mb_x;
slice_param->slice_type = ff_h264_get_slice_type(sl);
slice_param->direct_spatial_mv_pred_flag = sl->slice_type == AV_PICTURE_TYPE_B ? sl->direct_spatial_mv_pred : 0;
slice_param->num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0;
slice_param->num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0;
slice_param->cabac_init_idc = sl->cabac_init_idc;
slice_param->slice_qp_delta = sl->qscale - h->ps.pps->init_qp;
slice_param->disable_deblocking_filter_idc = sl->deblocking_filter < 2 ? !sl->deblocking_filter : sl->deblocking_filter;
slice_param->slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2;
slice_param->slice_beta_offset_div2 = sl->slice_beta_offset / 2;
slice_param->luma_log2_weight_denom = sl->pwt.luma_log2_weight_denom;
slice_param->chroma_log2_weight_denom = sl->pwt.chroma_log2_weight_denom;
fill_vaapi_RefPicList(slice_param->RefPicList0, sl->ref_list[0], sl->list_count > 0 ? sl->ref_count[0] : 0);
fill_vaapi_RefPicList(slice_param->RefPicList1, sl->ref_list[1], sl->list_count > 1 ? sl->ref_count[1] : 0);
fill_vaapi_plain_pred_weight_table(h, 0,
&slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0,
&slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0);
fill_vaapi_plain_pred_weight_table(h, 1,
&slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1,
&slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1);
return 0;
}
