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  1. /*
  2.  * DXVA2 H264 HW acceleration.
  3.  *
  4.  * copyright (c) 2009 Laurent Aimar
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "dxva2_internal.h"
  24. #include "h264.h"
  25. #include "h264data.h"
  26. #include "mpegutils.h"
  27.  
  28. struct dxva2_picture_context {
  29.     DXVA_PicParams_H264   pp;
  30.     DXVA_Qmatrix_H264     qm;
  31.     unsigned              slice_count;
  32.     DXVA_Slice_H264_Short slice_short[MAX_SLICES];
  33.     DXVA_Slice_H264_Long  slice_long[MAX_SLICES];
  34.     const uint8_t         *bitstream;
  35.     unsigned              bitstream_size;
  36. };
  37.  
  38. static void fill_picture_entry(DXVA_PicEntry_H264 *pic,
  39.                                unsigned index, unsigned flag)
  40. {
  41.     assert((index&0x7f) == index && (flag&0x01) == flag);
  42.     pic->bPicEntry = index | (flag << 7);
  43. }
  44.  
  45. static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const H264Context *h,
  46.                                     DXVA_PicParams_H264 *pp)
  47. {
  48.     const H264Picture *current_picture = h->cur_pic_ptr;
  49.     int i, j;
  50.  
  51.     memset(pp, 0, sizeof(*pp));
  52.     /* Configure current picture */
  53.     fill_picture_entry(&pp->CurrPic,
  54.                        ff_dxva2_get_surface_index(avctx, ctx, current_picture->f),
  55.                        h->picture_structure == PICT_BOTTOM_FIELD);
  56.     /* Configure the set of references */
  57.     pp->UsedForReferenceFlags  = 0;
  58.     pp->NonExistingFrameFlags  = 0;
  59.     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
  60.         const H264Picture *r;
  61.         if (j < h->short_ref_count) {
  62.             r = h->short_ref[j++];
  63.         } else {
  64.             r = NULL;
  65.             while (!r && j < h->short_ref_count + 16)
  66.                 r = h->long_ref[j++ - h->short_ref_count];
  67.         }
  68.         if (r) {
  69.             fill_picture_entry(&pp->RefFrameList[i],
  70.                                ff_dxva2_get_surface_index(avctx, ctx, r->f),
  71.                                r->long_ref != 0);
  72.  
  73.             if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
  74.                 pp->FieldOrderCntList[i][0] = r->field_poc[0];
  75.             if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
  76.                 pp->FieldOrderCntList[i][1] = r->field_poc[1];
  77.  
  78.             pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
  79.             if (r->reference & PICT_TOP_FIELD)
  80.                 pp->UsedForReferenceFlags |= 1 << (2*i + 0);
  81.             if (r->reference & PICT_BOTTOM_FIELD)
  82.                 pp->UsedForReferenceFlags |= 1 << (2*i + 1);
  83.         } else {
  84.             pp->RefFrameList[i].bPicEntry = 0xff;
  85.             pp->FieldOrderCntList[i][0]   = 0;
  86.             pp->FieldOrderCntList[i][1]   = 0;
  87.             pp->FrameNumList[i]           = 0;
  88.         }
  89.     }
  90.  
  91.     pp->wFrameWidthInMbsMinus1        = h->mb_width  - 1;
  92.     pp->wFrameHeightInMbsMinus1       = h->mb_height - 1;
  93.     pp->num_ref_frames                = h->sps.ref_frame_count;
  94.  
  95.     pp->wBitFields                    = ((h->picture_structure != PICT_FRAME) <<  0) |
  96.                                         ((h->sps.mb_aff &&
  97.                                         (h->picture_structure == PICT_FRAME)) <<  1) |
  98.                                         (h->sps.residual_color_transform_flag <<  2) |
  99.                                         /* sp_for_switch_flag (not implemented by FFmpeg) */
  100.                                         (0                                    <<  3) |
  101.                                         (h->sps.chroma_format_idc             <<  4) |
  102.                                         ((h->nal_ref_idc != 0)                <<  6) |
  103.                                         (h->pps.constrained_intra_pred        <<  7) |
  104.                                         (h->pps.weighted_pred                 <<  8) |
  105.                                         (h->pps.weighted_bipred_idc           <<  9) |
  106.                                         /* MbsConsecutiveFlag */
  107.                                         (1                                    << 11) |
  108.                                         (h->sps.frame_mbs_only_flag           << 12) |
  109.                                         (h->pps.transform_8x8_mode            << 13) |
  110.                                         ((h->sps.level_idc >= 31)             << 14) |
  111.                                         /* IntraPicFlag (Modified if we detect a non
  112.                                          * intra slice in dxva2_h264_decode_slice) */
  113.                                         (1                                    << 15);
  114.  
  115.     pp->bit_depth_luma_minus8         = h->sps.bit_depth_luma - 8;
  116.     pp->bit_depth_chroma_minus8       = h->sps.bit_depth_chroma - 8;
  117.     if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
  118.         pp->Reserved16Bits            = 0;
  119.     else if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
  120.         pp->Reserved16Bits            = 0x34c;
  121.     else
  122.         pp->Reserved16Bits            = 3; /* FIXME is there a way to detect the right mode ? */
  123.     pp->StatusReportFeedbackNumber    = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
  124.     pp->CurrFieldOrderCnt[0] = 0;
  125.     if ((h->picture_structure & PICT_TOP_FIELD) &&
  126.         current_picture->field_poc[0] != INT_MAX)
  127.         pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
  128.     pp->CurrFieldOrderCnt[1] = 0;
  129.     if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
  130.         current_picture->field_poc[1] != INT_MAX)
  131.         pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
  132.     pp->pic_init_qs_minus26           = h->pps.init_qs - 26;
  133.     pp->chroma_qp_index_offset        = h->pps.chroma_qp_index_offset[0];
  134.     pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
  135.     pp->ContinuationFlag              = 1;
  136.     pp->pic_init_qp_minus26           = h->pps.init_qp - 26;
  137.     pp->num_ref_idx_l0_active_minus1  = h->pps.ref_count[0] - 1;
  138.     pp->num_ref_idx_l1_active_minus1  = h->pps.ref_count[1] - 1;
  139.     pp->Reserved8BitsA                = 0;
  140.     pp->frame_num                     = h->frame_num;
  141.     pp->log2_max_frame_num_minus4     = h->sps.log2_max_frame_num - 4;
  142.     pp->pic_order_cnt_type            = h->sps.poc_type;
  143.     if (h->sps.poc_type == 0)
  144.         pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
  145.     else if (h->sps.poc_type == 1)
  146.         pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
  147.     pp->direct_8x8_inference_flag     = h->sps.direct_8x8_inference_flag;
  148.     pp->entropy_coding_mode_flag      = h->pps.cabac;
  149.     pp->pic_order_present_flag        = h->pps.pic_order_present;
  150.     pp->num_slice_groups_minus1       = h->pps.slice_group_count - 1;
  151.     pp->slice_group_map_type          = h->pps.mb_slice_group_map_type;
  152.     pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
  153.     pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present;
  154.     pp->Reserved8BitsB                = 0;
  155.     pp->slice_group_change_rate_minus1= 0;  /* XXX not implemented by FFmpeg */
  156.     //pp->SliceGroupMap[810];               /* XXX not implemented by FFmpeg */
  157. }
  158.  
  159. static void fill_scaling_lists(const AVCodecContext *avctx, AVDXVAContext *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
  160. {
  161.     unsigned i, j;
  162.     memset(qm, 0, sizeof(*qm));
  163.     if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
  164.         for (i = 0; i < 6; i++)
  165.             for (j = 0; j < 16; j++)
  166.                 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];
  167.  
  168.         for (i = 0; i < 64; i++) {
  169.             qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
  170.             qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
  171.         }
  172.     } else {
  173.         for (i = 0; i < 6; i++)
  174.             for (j = 0; j < 16; j++)
  175.                 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];
  176.  
  177.         for (i = 0; i < 64; i++) {
  178.             qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
  179.             qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
  180.         }
  181.     }
  182. }
  183.  
  184. static int is_slice_short(const AVCodecContext *avctx, AVDXVAContext *ctx)
  185. {
  186.     assert(DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 1 ||
  187.            DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 2);
  188.     return DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 2;
  189. }
  190.  
  191. static void fill_slice_short(DXVA_Slice_H264_Short *slice,
  192.                              unsigned position, unsigned size)
  193. {
  194.     memset(slice, 0, sizeof(*slice));
  195.     slice->BSNALunitDataLocation = position;
  196.     slice->SliceBytesInBuffer    = size;
  197.     slice->wBadSliceChopping     = 0;
  198. }
  199.  
  200. static int get_refpic_index(const DXVA_PicParams_H264 *pp, int surface_index)
  201. {
  202.     int i;
  203.     for (i = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
  204.         if ((pp->RefFrameList[i].bPicEntry & 0x7f) == surface_index)
  205.           return i;
  206.     }
  207.     return 0x7f;
  208. }
  209.  
  210. static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
  211.                             const DXVA_PicParams_H264 *pp, unsigned position, unsigned size)
  212. {
  213.     const H264Context *h = avctx->priv_data;
  214.     H264SliceContext *sl = &h->slice_ctx[0];
  215.     AVDXVAContext *ctx = avctx->hwaccel_context;
  216.     unsigned list;
  217.  
  218.     memset(slice, 0, sizeof(*slice));
  219.     slice->BSNALunitDataLocation = position;
  220.     slice->SliceBytesInBuffer    = size;
  221.     slice->wBadSliceChopping     = 0;
  222.  
  223.     slice->first_mb_in_slice     = (sl->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + sl->mb_x;
  224.     slice->NumMbsForSlice        = 0; /* XXX it is set once we have all slices */
  225.     slice->BitOffsetToSliceData  = get_bits_count(&sl->gb);
  226.     slice->slice_type            = ff_h264_get_slice_type(sl);
  227.     if (sl->slice_type_fixed)
  228.         slice->slice_type += 5;
  229.     slice->luma_log2_weight_denom       = sl->luma_log2_weight_denom;
  230.     slice->chroma_log2_weight_denom     = sl->chroma_log2_weight_denom;
  231.     if (sl->list_count > 0)
  232.         slice->num_ref_idx_l0_active_minus1 = sl->ref_count[0] - 1;
  233.     if (sl->list_count > 1)
  234.         slice->num_ref_idx_l1_active_minus1 = sl->ref_count[1] - 1;
  235.     slice->slice_alpha_c0_offset_div2   = sl->slice_alpha_c0_offset / 2;
  236.     slice->slice_beta_offset_div2       = sl->slice_beta_offset     / 2;
  237.     slice->Reserved8Bits                = 0;
  238.  
  239.     for (list = 0; list < 2; list++) {
  240.         unsigned i;
  241.         for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
  242.             if (list < sl->list_count && i < sl->ref_count[list]) {
  243.                 const H264Picture *r = sl->ref_list[list][i].parent;
  244.                 unsigned plane;
  245.                 unsigned index;
  246.                 if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
  247.                     index = ff_dxva2_get_surface_index(avctx, ctx, r->f);
  248.                 else
  249.                     index = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, r->f));
  250.                 fill_picture_entry(&slice->RefPicList[list][i], index,
  251.                                    r->reference == PICT_BOTTOM_FIELD);
  252.                 for (plane = 0; plane < 3; plane++) {
  253.                     int w, o;
  254.                     if (plane == 0 && sl->luma_weight_flag[list]) {
  255.                         w = sl->luma_weight[i][list][0];
  256.                         o = sl->luma_weight[i][list][1];
  257.                     } else if (plane >= 1 && sl->chroma_weight_flag[list]) {
  258.                         w = sl->chroma_weight[i][list][plane-1][0];
  259.                         o = sl->chroma_weight[i][list][plane-1][1];
  260.                     } else {
  261.                         w = 1 << (plane == 0 ? sl->luma_log2_weight_denom :
  262.                                                sl->chroma_log2_weight_denom);
  263.                         o = 0;
  264.                     }
  265.                     slice->Weights[list][i][plane][0] = w;
  266.                     slice->Weights[list][i][plane][1] = o;
  267.                 }
  268.             } else {
  269.                 unsigned plane;
  270.                 slice->RefPicList[list][i].bPicEntry = 0xff;
  271.                 for (plane = 0; plane < 3; plane++) {
  272.                     slice->Weights[list][i][plane][0] = 0;
  273.                     slice->Weights[list][i][plane][1] = 0;
  274.                 }
  275.             }
  276.         }
  277.     }
  278.     slice->slice_qs_delta    = 0; /* XXX not implemented by FFmpeg */
  279.     slice->slice_qp_delta    = sl->qscale - h->pps.init_qp;
  280.     slice->redundant_pic_cnt = sl->redundant_pic_count;
  281.     if (sl->slice_type == AV_PICTURE_TYPE_B)
  282.         slice->direct_spatial_mv_pred_flag = sl->direct_spatial_mv_pred;
  283.     slice->cabac_init_idc = h->pps.cabac ? sl->cabac_init_idc : 0;
  284.     if (sl->deblocking_filter < 2)
  285.         slice->disable_deblocking_filter_idc = 1 - sl->deblocking_filter;
  286.     else
  287.         slice->disable_deblocking_filter_idc = sl->deblocking_filter;
  288.     slice->slice_id = h->current_slice - 1;
  289. }
  290.  
  291. static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
  292.                                              DECODER_BUFFER_DESC *bs,
  293.                                              DECODER_BUFFER_DESC *sc)
  294. {
  295.     const H264Context *h = avctx->priv_data;
  296.     const unsigned mb_count = h->mb_width * h->mb_height;
  297.     AVDXVAContext *ctx = avctx->hwaccel_context;
  298.     const H264Picture *current_picture = h->cur_pic_ptr;
  299.     struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
  300.     DXVA_Slice_H264_Short *slice = NULL;
  301.     void     *dxva_data_ptr = NULL;
  302.     uint8_t  *dxva_data, *current, *end;
  303.     unsigned dxva_size = 0;
  304.     void     *slice_data;
  305.     unsigned slice_size;
  306.     unsigned padding;
  307.     unsigned i;
  308.     unsigned type;
  309.  
  310.     /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
  311. #if CONFIG_D3D11VA
  312.     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
  313.         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
  314.         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
  315.                                                        D3D11VA_CONTEXT(ctx)->decoder,
  316.                                                        type,
  317.                                                        &dxva_size, &dxva_data_ptr)))
  318.             return -1;
  319.     }
  320. #endif
  321. #if CONFIG_DXVA2
  322.     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
  323.         type = DXVA2_BitStreamDateBufferType;
  324.         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
  325.                                                   type,
  326.                                                   &dxva_data_ptr, &dxva_size)))
  327.             return -1;
  328.     }
  329. #endif
  330.  
  331.     dxva_data = dxva_data_ptr;
  332.     current = dxva_data;
  333.     end = dxva_data + dxva_size;
  334.  
  335.     for (i = 0; i < ctx_pic->slice_count; i++) {
  336.         static const uint8_t start_code[] = { 0, 0, 1 };
  337.         static const unsigned start_code_size = sizeof(start_code);
  338.         unsigned position, size;
  339.  
  340.         assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
  341.                offsetof(DXVA_Slice_H264_Long,  BSNALunitDataLocation));
  342.         assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
  343.                offsetof(DXVA_Slice_H264_Long,  SliceBytesInBuffer));
  344.  
  345.         if (is_slice_short(avctx, ctx))
  346.             slice = &ctx_pic->slice_short[i];
  347.         else
  348.             slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i];
  349.  
  350.         position = slice->BSNALunitDataLocation;
  351.         size     = slice->SliceBytesInBuffer;
  352.         if (start_code_size + size > end - current) {
  353.             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
  354.             break;
  355.         }
  356.  
  357.         slice->BSNALunitDataLocation = current - dxva_data;
  358.         slice->SliceBytesInBuffer    = start_code_size + size;
  359.  
  360.         if (!is_slice_short(avctx, ctx)) {
  361.             DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
  362.             if (i < ctx_pic->slice_count - 1)
  363.                 slice_long->NumMbsForSlice =
  364.                     slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
  365.             else
  366.                 slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
  367.         }
  368.  
  369.         memcpy(current, start_code, start_code_size);
  370.         current += start_code_size;
  371.  
  372.         memcpy(current, &ctx_pic->bitstream[position], size);
  373.         current += size;
  374.     }
  375.     padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
  376.     if (slice && padding > 0) {
  377.         memset(current, 0, padding);
  378.         current += padding;
  379.  
  380.         slice->SliceBytesInBuffer += padding;
  381.     }
  382. #if CONFIG_D3D11VA
  383.     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD)
  384.         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
  385.             return -1;
  386. #endif
  387. #if CONFIG_DXVA2
  388.     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
  389.         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
  390.             return -1;
  391. #endif
  392.     if (i < ctx_pic->slice_count)
  393.         return -1;
  394.  
  395. #if CONFIG_D3D11VA
  396.     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
  397.         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
  398.         memset(dsc11, 0, sizeof(*dsc11));
  399.         dsc11->BufferType           = type;
  400.         dsc11->DataSize             = current - dxva_data;
  401.         dsc11->NumMBsInBuffer       = mb_count;
  402.  
  403.         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
  404.     }
  405. #endif
  406. #if CONFIG_DXVA2
  407.     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
  408.         DXVA2_DecodeBufferDesc *dsc2 = bs;
  409.         memset(dsc2, 0, sizeof(*dsc2));
  410.         dsc2->CompressedBufferType = type;
  411.         dsc2->DataSize             = current - dxva_data;
  412.         dsc2->NumMBsInBuffer       = mb_count;
  413.  
  414.         type = DXVA2_SliceControlBufferType;
  415.     }
  416. #endif
  417.  
  418.     if (is_slice_short(avctx, ctx)) {
  419.         slice_data = ctx_pic->slice_short;
  420.         slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
  421.     } else {
  422.         slice_data = ctx_pic->slice_long;
  423.         slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
  424.     }
  425.     assert((bs->DataSize & 127) == 0);
  426.     return ff_dxva2_commit_buffer(avctx, ctx, sc,
  427.                                   type,
  428.                                   slice_data, slice_size, mb_count);
  429. }
  430.  
  431.  
  432. static int dxva2_h264_start_frame(AVCodecContext *avctx,
  433.                                   av_unused const uint8_t *buffer,
  434.                                   av_unused uint32_t size)
  435. {
  436.     const H264Context *h = avctx->priv_data;
  437.     AVDXVAContext *ctx = avctx->hwaccel_context;
  438.     struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
  439.  
  440.     if (DXVA_CONTEXT_DECODER(avctx, ctx) == NULL ||
  441.         DXVA_CONTEXT_CFG(avctx, ctx) == NULL ||
  442.         DXVA_CONTEXT_COUNT(avctx, ctx) <= 0)
  443.         return -1;
  444.     assert(ctx_pic);
  445.  
  446.     /* Fill up DXVA_PicParams_H264 */
  447.     fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
  448.  
  449.     /* Fill up DXVA_Qmatrix_H264 */
  450.     fill_scaling_lists(avctx, ctx, h, &ctx_pic->qm);
  451.  
  452.     ctx_pic->slice_count    = 0;
  453.     ctx_pic->bitstream_size = 0;
  454.     ctx_pic->bitstream      = NULL;
  455.     return 0;
  456. }
  457.  
  458. static int dxva2_h264_decode_slice(AVCodecContext *avctx,
  459.                                    const uint8_t *buffer,
  460.                                    uint32_t size)
  461. {
  462.     const H264Context *h = avctx->priv_data;
  463.     const H264SliceContext *sl = &h->slice_ctx[0];
  464.     AVDXVAContext *ctx = avctx->hwaccel_context;
  465.     const H264Picture *current_picture = h->cur_pic_ptr;
  466.     struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
  467.     unsigned position;
  468.  
  469.     if (ctx_pic->slice_count >= MAX_SLICES)
  470.         return -1;
  471.  
  472.     if (!ctx_pic->bitstream)
  473.         ctx_pic->bitstream = buffer;
  474.     ctx_pic->bitstream_size += size;
  475.  
  476.     position = buffer - ctx_pic->bitstream;
  477.     if (is_slice_short(avctx, ctx))
  478.         fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
  479.                          position, size);
  480.     else
  481.         fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
  482.                         &ctx_pic->pp, position, size);
  483.     ctx_pic->slice_count++;
  484.  
  485.     if (sl->slice_type != AV_PICTURE_TYPE_I && sl->slice_type != AV_PICTURE_TYPE_SI)
  486.         ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
  487.     return 0;
  488. }
  489.  
  490. static int dxva2_h264_end_frame(AVCodecContext *avctx)
  491. {
  492.     H264Context *h = avctx->priv_data;
  493.     H264SliceContext *sl = &h->slice_ctx[0];
  494.     struct dxva2_picture_context *ctx_pic =
  495.         h->cur_pic_ptr->hwaccel_picture_private;
  496.     int ret;
  497.  
  498.     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
  499.         return -1;
  500.     ret = ff_dxva2_common_end_frame(avctx, h->cur_pic_ptr->f,
  501.                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
  502.                                     &ctx_pic->qm, sizeof(ctx_pic->qm),
  503.                                     commit_bitstream_and_slice_buffer);
  504.     if (!ret)
  505.         ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
  506.     return ret;
  507. }
  508.  
  509. #if CONFIG_H264_DXVA2_HWACCEL
  510. AVHWAccel ff_h264_dxva2_hwaccel = {
  511.     .name           = "h264_dxva2",
  512.     .type           = AVMEDIA_TYPE_VIDEO,
  513.     .id             = AV_CODEC_ID_H264,
  514.     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
  515.     .start_frame    = dxva2_h264_start_frame,
  516.     .decode_slice   = dxva2_h264_decode_slice,
  517.     .end_frame      = dxva2_h264_end_frame,
  518.     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
  519. };
  520. #endif
  521.  
  522. #if CONFIG_H264_D3D11VA_HWACCEL
  523. AVHWAccel ff_h264_d3d11va_hwaccel = {
  524.     .name           = "h264_d3d11va",
  525.     .type           = AVMEDIA_TYPE_VIDEO,
  526.     .id             = AV_CODEC_ID_H264,
  527.     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
  528.     .start_frame    = dxva2_h264_start_frame,
  529.     .decode_slice   = dxva2_h264_decode_slice,
  530.     .end_frame      = dxva2_h264_end_frame,
  531.     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
  532. };
  533. #endif
  534.