yading@10: /* yading@10: * H.264 HW decode acceleration through VA API yading@10: * yading@10: * Copyright (C) 2008-2009 Splitted-Desktop Systems yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include "vaapi_internal.h" yading@10: #include "h264.h" yading@10: yading@10: /** yading@10: * @file yading@10: * This file implements the glue code between FFmpeg's and VA API's yading@10: * structures for H.264 decoding. yading@10: */ yading@10: yading@10: /** yading@10: * Initialize an empty VA API picture. yading@10: * yading@10: * VA API requires a fixed-size reference picture array. yading@10: */ yading@10: static void init_vaapi_pic(VAPictureH264 *va_pic) yading@10: { yading@10: va_pic->picture_id = VA_INVALID_ID; yading@10: va_pic->flags = VA_PICTURE_H264_INVALID; yading@10: va_pic->TopFieldOrderCnt = 0; yading@10: va_pic->BottomFieldOrderCnt = 0; yading@10: } yading@10: yading@10: /** yading@10: * Translate an FFmpeg Picture into its VA API form. yading@10: * yading@10: * @param[out] va_pic A pointer to VA API's own picture struct yading@10: * @param[in] pic A pointer to the FFmpeg picture struct to convert yading@10: * @param[in] pic_structure The picture field type (as defined in mpegvideo.h), yading@10: * supersedes pic's field type if nonzero. yading@10: */ yading@10: static void fill_vaapi_pic(VAPictureH264 *va_pic, yading@10: Picture *pic, yading@10: int pic_structure) yading@10: { yading@10: if (pic_structure == 0) yading@10: pic_structure = pic->reference; yading@10: pic_structure &= PICT_FRAME; /* PICT_TOP_FIELD|PICT_BOTTOM_FIELD */ yading@10: yading@10: va_pic->picture_id = ff_vaapi_get_surface_id(pic); yading@10: va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; yading@10: yading@10: va_pic->flags = 0; yading@10: if (pic_structure != PICT_FRAME) yading@10: va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD; yading@10: if (pic->reference) yading@10: va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE; yading@10: yading@10: va_pic->TopFieldOrderCnt = 0; yading@10: if (pic->field_poc[0] != INT_MAX) yading@10: va_pic->TopFieldOrderCnt = pic->field_poc[0]; yading@10: yading@10: va_pic->BottomFieldOrderCnt = 0; yading@10: if (pic->field_poc[1] != INT_MAX) yading@10: va_pic->BottomFieldOrderCnt = pic->field_poc[1]; yading@10: } yading@10: yading@10: /** Decoded Picture Buffer (DPB). */ yading@10: typedef struct DPB { yading@10: int size; ///< Current number of reference frames in the DPB yading@10: int max_size; ///< Max number of reference frames. This is FF_ARRAY_ELEMS(VAPictureParameterBufferH264.ReferenceFrames) yading@10: VAPictureH264 *va_pics; ///< Pointer to VAPictureParameterBufferH264.ReferenceFrames array yading@10: } DPB; yading@10: yading@10: /** yading@10: * Append picture to the decoded picture buffer, in a VA API form that yading@10: * merges the second field picture attributes with the first, if yading@10: * available. The decoded picture buffer's size must be large enough yading@10: * to receive the new VA API picture object. yading@10: */ yading@10: static int dpb_add(DPB *dpb, Picture *pic) yading@10: { yading@10: int i; yading@10: yading@10: if (dpb->size >= dpb->max_size) yading@10: return -1; yading@10: yading@10: for (i = 0; i < dpb->size; i++) { yading@10: VAPictureH264 * const va_pic = &dpb->va_pics[i]; yading@10: if (va_pic->picture_id == ff_vaapi_get_surface_id(pic)) { yading@10: VAPictureH264 temp_va_pic; yading@10: fill_vaapi_pic(&temp_va_pic, pic, 0); yading@10: yading@10: if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) { yading@10: va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD); yading@10: /* Merge second field */ yading@10: if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) { yading@10: va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt; yading@10: } else { yading@10: va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: } yading@10: yading@10: fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0); yading@10: return 0; yading@10: } yading@10: yading@10: /** Fill in VA API reference frames array. */ yading@10: static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param, yading@10: H264Context *h) yading@10: { yading@10: DPB dpb; yading@10: int i; yading@10: yading@10: dpb.size = 0; yading@10: dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames); yading@10: dpb.va_pics = pic_param->ReferenceFrames; yading@10: for (i = 0; i < dpb.max_size; i++) yading@10: init_vaapi_pic(&dpb.va_pics[i]); yading@10: yading@10: for (i = 0; i < h->short_ref_count; i++) { yading@10: Picture * const pic = h->short_ref[i]; yading@10: if (pic && pic->reference && dpb_add(&dpb, pic) < 0) yading@10: return -1; yading@10: } yading@10: yading@10: for (i = 0; i < 16; i++) { yading@10: Picture * const pic = h->long_ref[i]; yading@10: if (pic && pic->reference && dpb_add(&dpb, pic) < 0) yading@10: return -1; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Fill in VA API reference picture lists from the FFmpeg reference yading@10: * picture list. yading@10: * yading@10: * @param[out] RefPicList VA API internal reference picture list yading@10: * @param[in] ref_list A pointer to the FFmpeg reference list yading@10: * @param[in] ref_count The number of reference pictures in ref_list yading@10: */ yading@10: static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32], yading@10: Picture *ref_list, yading@10: unsigned int ref_count) yading@10: { yading@10: unsigned int i, n = 0; yading@10: for (i = 0; i < ref_count; i++) yading@10: if (ref_list[i].reference) yading@10: fill_vaapi_pic(&RefPicList[n++], &ref_list[i], 0); yading@10: yading@10: for (; n < 32; n++) yading@10: init_vaapi_pic(&RefPicList[n]); yading@10: } yading@10: yading@10: /** yading@10: * Fill in prediction weight table. yading@10: * yading@10: * VA API requires a plain prediction weight table as it does not infer yading@10: * any value. yading@10: * yading@10: * @param[in] h A pointer to the current H.264 context yading@10: * @param[in] list The reference frame list index to use yading@10: * @param[out] luma_weight_flag VA API plain luma weight flag yading@10: * @param[out] luma_weight VA API plain luma weight table yading@10: * @param[out] luma_offset VA API plain luma offset table yading@10: * @param[out] chroma_weight_flag VA API plain chroma weight flag yading@10: * @param[out] chroma_weight VA API plain chroma weight table yading@10: * @param[out] chroma_offset VA API plain chroma offset table yading@10: */ yading@10: static void fill_vaapi_plain_pred_weight_table(H264Context *h, yading@10: int list, yading@10: unsigned char *luma_weight_flag, yading@10: short luma_weight[32], yading@10: short luma_offset[32], yading@10: unsigned char *chroma_weight_flag, yading@10: short chroma_weight[32][2], yading@10: short chroma_offset[32][2]) yading@10: { yading@10: unsigned int i, j; yading@10: yading@10: *luma_weight_flag = h->luma_weight_flag[list]; yading@10: *chroma_weight_flag = h->chroma_weight_flag[list]; yading@10: yading@10: for (i = 0; i < h->ref_count[list]; i++) { yading@10: /* VA API also wants the inferred (default) values, not yading@10: only what is available in the bitstream (7.4.3.2). */ yading@10: if (h->luma_weight_flag[list]) { yading@10: luma_weight[i] = h->luma_weight[i][list][0]; yading@10: luma_offset[i] = h->luma_weight[i][list][1]; yading@10: } else { yading@10: luma_weight[i] = 1 << h->luma_log2_weight_denom; yading@10: luma_offset[i] = 0; yading@10: } yading@10: for (j = 0; j < 2; j++) { yading@10: if (h->chroma_weight_flag[list]) { yading@10: chroma_weight[i][j] = h->chroma_weight[i][list][j][0]; yading@10: chroma_offset[i][j] = h->chroma_weight[i][list][j][1]; yading@10: } else { yading@10: chroma_weight[i][j] = 1 << h->chroma_log2_weight_denom; yading@10: chroma_offset[i][j] = 0; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** Initialize and start decoding a frame with VA API. */ yading@10: static int vaapi_h264_start_frame(AVCodecContext *avctx, yading@10: av_unused const uint8_t *buffer, yading@10: av_unused uint32_t size) yading@10: { yading@10: H264Context * const h = avctx->priv_data; yading@10: struct vaapi_context * const vactx = avctx->hwaccel_context; yading@10: VAPictureParameterBufferH264 *pic_param; yading@10: VAIQMatrixBufferH264 *iq_matrix; yading@10: yading@10: av_dlog(avctx, "vaapi_h264_start_frame()\n"); yading@10: yading@10: vactx->slice_param_size = sizeof(VASliceParameterBufferH264); yading@10: yading@10: /* Fill in VAPictureParameterBufferH264. */ yading@10: pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferH264)); yading@10: if (!pic_param) yading@10: return -1; yading@10: fill_vaapi_pic(&pic_param->CurrPic, h->cur_pic_ptr, h->picture_structure); yading@10: if (fill_vaapi_ReferenceFrames(pic_param, h) < 0) yading@10: return -1; yading@10: pic_param->picture_width_in_mbs_minus1 = h->mb_width - 1; yading@10: pic_param->picture_height_in_mbs_minus1 = h->mb_height - 1; yading@10: pic_param->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8; yading@10: pic_param->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; yading@10: pic_param->num_ref_frames = h->sps.ref_frame_count; yading@10: pic_param->seq_fields.value = 0; /* reset all bits */ yading@10: pic_param->seq_fields.bits.chroma_format_idc = h->sps.chroma_format_idc; yading@10: pic_param->seq_fields.bits.residual_colour_transform_flag = h->sps.residual_color_transform_flag; /* XXX: only for 4:4:4 high profile? */ yading@10: pic_param->seq_fields.bits.gaps_in_frame_num_value_allowed_flag = h->sps.gaps_in_frame_num_allowed_flag; yading@10: pic_param->seq_fields.bits.frame_mbs_only_flag = h->sps.frame_mbs_only_flag; yading@10: pic_param->seq_fields.bits.mb_adaptive_frame_field_flag = h->sps.mb_aff; yading@10: pic_param->seq_fields.bits.direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; yading@10: pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = h->sps.level_idc >= 31; /* A.3.3.2 */ yading@10: pic_param->seq_fields.bits.log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; yading@10: pic_param->seq_fields.bits.pic_order_cnt_type = h->sps.poc_type; yading@10: pic_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4; yading@10: pic_param->seq_fields.bits.delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; yading@10: pic_param->num_slice_groups_minus1 = h->pps.slice_group_count - 1; yading@10: pic_param->slice_group_map_type = h->pps.mb_slice_group_map_type; yading@10: pic_param->slice_group_change_rate_minus1 = 0; /* XXX: unimplemented in FFmpeg */ yading@10: pic_param->pic_init_qp_minus26 = h->pps.init_qp - 26; yading@10: pic_param->pic_init_qs_minus26 = h->pps.init_qs - 26; yading@10: pic_param->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; yading@10: pic_param->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; yading@10: pic_param->pic_fields.value = 0; /* reset all bits */ yading@10: pic_param->pic_fields.bits.entropy_coding_mode_flag = h->pps.cabac; yading@10: pic_param->pic_fields.bits.weighted_pred_flag = h->pps.weighted_pred; yading@10: pic_param->pic_fields.bits.weighted_bipred_idc = h->pps.weighted_bipred_idc; yading@10: pic_param->pic_fields.bits.transform_8x8_mode_flag = h->pps.transform_8x8_mode; yading@10: pic_param->pic_fields.bits.field_pic_flag = h->picture_structure != PICT_FRAME; yading@10: pic_param->pic_fields.bits.constrained_intra_pred_flag = h->pps.constrained_intra_pred; yading@10: pic_param->pic_fields.bits.pic_order_present_flag = h->pps.pic_order_present; yading@10: pic_param->pic_fields.bits.deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; yading@10: pic_param->pic_fields.bits.redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present; yading@10: pic_param->pic_fields.bits.reference_pic_flag = h->nal_ref_idc != 0; yading@10: pic_param->frame_num = h->frame_num; yading@10: yading@10: /* Fill in VAIQMatrixBufferH264. */ yading@10: iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferH264)); yading@10: if (!iq_matrix) yading@10: return -1; yading@10: memcpy(iq_matrix->ScalingList4x4, h->pps.scaling_matrix4, sizeof(iq_matrix->ScalingList4x4)); yading@10: memcpy(iq_matrix->ScalingList8x8[0], h->pps.scaling_matrix8[0], sizeof(iq_matrix->ScalingList8x8[0])); yading@10: memcpy(iq_matrix->ScalingList8x8[1], h->pps.scaling_matrix8[3], sizeof(iq_matrix->ScalingList8x8[0])); yading@10: return 0; yading@10: } yading@10: yading@10: /** End a hardware decoding based frame. */ yading@10: static int vaapi_h264_end_frame(AVCodecContext *avctx) yading@10: { yading@10: struct vaapi_context * const vactx = avctx->hwaccel_context; yading@10: H264Context * const h = avctx->priv_data; yading@10: int ret; yading@10: yading@10: av_dlog(avctx, "vaapi_h264_end_frame()\n"); yading@10: ret = ff_vaapi_commit_slices(vactx); yading@10: if (ret < 0) yading@10: goto finish; yading@10: yading@10: ret = ff_vaapi_render_picture(vactx, ff_vaapi_get_surface_id(h->cur_pic_ptr)); yading@10: if (ret < 0) yading@10: goto finish; yading@10: yading@10: ff_h264_draw_horiz_band(h, 0, h->avctx->height); yading@10: yading@10: finish: yading@10: ff_vaapi_common_end_frame(avctx); yading@10: return ret; yading@10: } yading@10: yading@10: /** Decode the given H.264 slice with VA API. */ yading@10: static int vaapi_h264_decode_slice(AVCodecContext *avctx, yading@10: const uint8_t *buffer, yading@10: uint32_t size) yading@10: { yading@10: H264Context * const h = avctx->priv_data; yading@10: VASliceParameterBufferH264 *slice_param; yading@10: yading@10: av_dlog(avctx, "vaapi_h264_decode_slice(): buffer %p, size %d\n", yading@10: buffer, size); yading@10: yading@10: /* Fill in VASliceParameterBufferH264. */ yading@10: slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); yading@10: if (!slice_param) yading@10: return -1; yading@10: slice_param->slice_data_bit_offset = get_bits_count(&h->gb) + 8; /* bit buffer started beyond nal_unit_type */ yading@10: slice_param->first_mb_in_slice = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x; yading@10: slice_param->slice_type = ff_h264_get_slice_type(h); yading@10: slice_param->direct_spatial_mv_pred_flag = h->slice_type == AV_PICTURE_TYPE_B ? h->direct_spatial_mv_pred : 0; yading@10: slice_param->num_ref_idx_l0_active_minus1 = h->list_count > 0 ? h->ref_count[0] - 1 : 0; yading@10: slice_param->num_ref_idx_l1_active_minus1 = h->list_count > 1 ? h->ref_count[1] - 1 : 0; yading@10: slice_param->cabac_init_idc = h->cabac_init_idc; yading@10: slice_param->slice_qp_delta = h->qscale - h->pps.init_qp; yading@10: slice_param->disable_deblocking_filter_idc = h->deblocking_filter < 2 ? !h->deblocking_filter : h->deblocking_filter; yading@10: slice_param->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26; yading@10: slice_param->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26; yading@10: slice_param->luma_log2_weight_denom = h->luma_log2_weight_denom; yading@10: slice_param->chroma_log2_weight_denom = h->chroma_log2_weight_denom; yading@10: yading@10: fill_vaapi_RefPicList(slice_param->RefPicList0, h->ref_list[0], h->list_count > 0 ? h->ref_count[0] : 0); yading@10: fill_vaapi_RefPicList(slice_param->RefPicList1, h->ref_list[1], h->list_count > 1 ? h->ref_count[1] : 0); yading@10: yading@10: fill_vaapi_plain_pred_weight_table(h, 0, yading@10: &slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0, yading@10: &slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0); yading@10: fill_vaapi_plain_pred_weight_table(h, 1, yading@10: &slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1, yading@10: &slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1); yading@10: return 0; yading@10: } yading@10: yading@10: AVHWAccel ff_h264_vaapi_hwaccel = { yading@10: .name = "h264_vaapi", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_H264, yading@10: .pix_fmt = AV_PIX_FMT_VAAPI_VLD, yading@10: .start_frame = vaapi_h264_start_frame, yading@10: .end_frame = vaapi_h264_end_frame, yading@10: .decode_slice = vaapi_h264_decode_slice, yading@10: };