git.sesse.net Git - ffmpeg/blob - libavcodec/dxva2_vc1.c

   1 /*
   2  * DXVA2 WMV3/VC-1 HW acceleration.
   3  *
   4  * copyright (c) 2010 Laurent Aimar
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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 "vc1.h"
  25 #include "vc1data.h"
  26
  27 struct dxva2_picture_context {
  28     DXVA_PictureParameters pp;
  29     DXVA_SliceInfo         si;
  30
  31     const uint8_t          *bitstream;
  32     unsigned               bitstream_size;
  33 };
  34
  35 static void fill_picture_parameters(AVCodecContext *avctx,
  36                                     struct dxva_context *ctx, const VC1Context *v,
  37                                     DXVA_PictureParameters *pp)
  38 {
  39     const MpegEncContext *s = &v->s;
  40     const Picture *current_picture = s->current_picture_ptr;
  41
  42     memset(pp, 0, sizeof(*pp));
  43     pp->wDecodedPictureIndex    =
  44     pp->wDeblockedPictureIndex  = ff_dxva2_get_surface_index(ctx, current_picture);
  45     if (s->pict_type != AV_PICTURE_TYPE_I && !v->bi_type)
  46         pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->last_picture);
  47     else
  48         pp->wForwardRefPictureIndex = 0xffff;
  49     if (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type)
  50         pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->next_picture);
  51     else
  52         pp->wBackwardRefPictureIndex = 0xffff;
  53     if (v->profile == PROFILE_ADVANCED) {
  54         /* It is the cropped width/height -1 of the frame */
  55         pp->wPicWidthInMBminus1 = avctx->width  - 1;
  56         pp->wPicHeightInMBminus1= avctx->height - 1;
  57     } else {
  58         /* It is the coded width/height in macroblock -1 of the frame */
  59         pp->wPicWidthInMBminus1 = s->mb_width  - 1;
  60         pp->wPicHeightInMBminus1= s->mb_height - 1;
  61     }
  62     pp->bMacroblockWidthMinus1  = 15;
  63     pp->bMacroblockHeightMinus1 = 15;
  64     pp->bBlockWidthMinus1       = 7;
  65     pp->bBlockHeightMinus1      = 7;
  66     pp->bBPPminus1              = 7;
  67     if (s->picture_structure & PICT_TOP_FIELD)
  68         pp->bPicStructure      |= 0x01;
  69     if (s->picture_structure & PICT_BOTTOM_FIELD)
  70         pp->bPicStructure      |= 0x02;
  71     pp->bSecondField            = v->interlace && v->fcm != ILACE_FIELD && !s->first_field;
  72     pp->bPicIntra               = s->pict_type == AV_PICTURE_TYPE_I || v->bi_type;
  73     pp->bPicBackwardPrediction  = s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
  74     pp->bBidirectionalAveragingMode = (1                                           << 7) |
  75                                       ((ctx->cfg->ConfigIntraResidUnsigned != 0)   << 6) |
  76                                       ((ctx->cfg->ConfigResidDiffAccelerator != 0) << 5) |
  77                                       ((v->lumscale != 32 || v->lumshift != 0)     << 4) |
  78                                       ((v->profile == PROFILE_ADVANCED)            << 3);
  79     pp->bMVprecisionAndChromaRelation = ((v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) << 3) |
  80                                         (1                                       << 2) |
  81                                         (0                                       << 1) |
  82                                         (!s->quarter_sample                          );
  83     pp->bChromaFormat           = v->chromaformat;
  84     ctx->report_id++;
  85     if (ctx->report_id >= (1 << 16))
  86         ctx->report_id = 1;
  87     pp->bPicScanFixed           = ctx->report_id >> 8;
  88     pp->bPicScanMethod          = ctx->report_id & 0xff;
  89     pp->bPicReadbackRequests    = 0;
  90     pp->bRcontrol               = v->rnd;
  91     pp->bPicSpatialResid8       = (v->panscanflag  << 7) |
  92                                   (v->refdist_flag << 6) |
  93                                   (s->loop_filter  << 5) |
  94                                   (v->fastuvmc     << 4) |
  95                                   (v->extended_mv  << 3) |
  96                                   (v->dquant       << 1) |
  97                                   (v->vstransform      );
  98     pp->bPicOverflowBlocks      = (v->quantizer_mode << 6) |
  99                                   (v->multires       << 5) |
 100                                   (s->resync_marker  << 4) |
 101                                   (v->rangered       << 3) |
 102                                   (s->max_b_frames       );
 103     pp->bPicExtrapolation       = (!v->interlace || v->fcm == PROGRESSIVE) ? 1 : 2;
 104     pp->bPicDeblocked           = ((!pp->bPicBackwardPrediction && v->overlap)        << 6) |
 105                                   ((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
 106                                   (s->loop_filter                                     << 1);
 107     pp->bPicDeblockConfined     = (v->postprocflag             << 7) |
 108                                   (v->broadcast                << 6) |
 109                                   (v->interlace                << 5) |
 110                                   (v->tfcntrflag               << 4) |
 111                                   (v->finterpflag              << 3) |
 112                                   ((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
 113                                   (v->psf                      << 1) |
 114                                   (v->extended_dmv                 );
 115     if (s->pict_type != AV_PICTURE_TYPE_I)
 116         pp->bPic4MVallowed      = v->mv_mode == MV_PMODE_MIXED_MV ||
 117                                   (v->mv_mode == MV_PMODE_INTENSITY_COMP &&
 118                                    v->mv_mode2 == MV_PMODE_MIXED_MV);
 119     if (v->profile == PROFILE_ADVANCED)
 120         pp->bPicOBMC            = (v->range_mapy_flag  << 7) |
 121                                   (v->range_mapy       << 4) |
 122                                   (v->range_mapuv_flag << 3) |
 123                                   (v->range_mapuv          );
 124     pp->bPicBinPB               = 0;
 125     pp->bMV_RPS                 = 0;
 126     pp->bReservedBits           = 0;
 127     if (s->picture_structure == PICT_FRAME) {
 128         pp->wBitstreamFcodes        = v->lumscale;
 129         pp->wBitstreamPCEelements   = v->lumshift;
 130     } else {
 131         /* Syntax: (top_field_param << 8) | bottom_field_param */
 132         pp->wBitstreamFcodes        = (v->lumscale << 8) | v->lumscale;
 133         pp->wBitstreamPCEelements   = (v->lumshift << 8) | v->lumshift;
 134     }
 135     pp->bBitstreamConcealmentNeed   = 0;
 136     pp->bBitstreamConcealmentMethod = 0;
 137 }
 138
 139 static void fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
 140                        unsigned position, unsigned size)
 141 {
 142     const VC1Context *v = avctx->priv_data;
 143     const MpegEncContext *s = &v->s;
 144
 145     memset(slice, 0, sizeof(*slice));
 146     slice->wHorizontalPosition = 0;
 147     slice->wVerticalPosition   = s->mb_y;
 148     slice->dwSliceBitsInBuffer = 8 * size;
 149     slice->dwSliceDataLocation = position;
 150     slice->bStartCodeBitOffset = 0;
 151     slice->bReservedBits       = 0;
 152     slice->wMBbitOffset        = get_bits_count(&s->gb);
 153     slice->wNumberMBsInSlice   = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
 154     slice->wQuantizerScaleCode = v->pq;
 155     slice->wBadSliceChopping   = 0;
 156 }
 157
 158 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 159                                              DXVA2_DecodeBufferDesc *bs,
 160                                              DXVA2_DecodeBufferDesc *sc)
 161 {
 162     const VC1Context *v = avctx->priv_data;
 163     struct dxva_context *ctx = avctx->hwaccel_context;
 164     const MpegEncContext *s = &v->s;
 165     struct dxva2_picture_context *ctx_pic = s->current_picture_ptr->f.hwaccel_picture_private;
 166
 167     DXVA_SliceInfo *slice = &ctx_pic->si;
 168
 169     static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
 170     const unsigned start_code_size = avctx->codec_id == CODEC_ID_VC1 ? sizeof(start_code) : 0;
 171     const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
 172     const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
 173     const unsigned data_size = start_code_size + slice_size + padding;
 174
 175     uint8_t  *dxva_data;
 176     unsigned dxva_size;
 177     int result;
 178
 179     if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
 180                                               DXVA2_BitStreamDateBufferType,
 181                                               &dxva_data, &dxva_size)))
 182         return -1;
 183
 184     result = data_size <= dxva_size ? 0 : -1;
 185     if (!result) {
 186         if (start_code_size > 0)
 187             memcpy(dxva_data, start_code, start_code_size);
 188         memcpy(dxva_data + start_code_size,
 189                ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
 190         if (padding > 0)
 191             memset(dxva_data + start_code_size + slice_size, 0, padding);
 192         slice->dwSliceBitsInBuffer = 8 * data_size;
 193     }
 194     if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
 195                                                   DXVA2_BitStreamDateBufferType)))
 196         return -1;
 197     if (result)
 198         return result;
 199
 200     memset(bs, 0, sizeof(*bs));
 201     bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
 202     bs->DataSize             = data_size;
 203     bs->NumMBsInBuffer       = s->mb_width * s->mb_height;
 204     assert((bs->DataSize & 127) == 0);
 205
 206     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 207                                   DXVA2_SliceControlBufferType,
 208                                   slice, sizeof(*slice), bs->NumMBsInBuffer);
 209 }
 210
 211 static int start_frame(AVCodecContext *avctx,
 212                        av_unused const uint8_t *buffer,
 213                        av_unused uint32_t size)
 214 {
 215     const VC1Context *v = avctx->priv_data;
 216     struct dxva_context *ctx = avctx->hwaccel_context;
 217     struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->f.hwaccel_picture_private;
 218
 219     if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
 220         return -1;
 221     assert(ctx_pic);
 222
 223     fill_picture_parameters(avctx, ctx, v, &ctx_pic->pp);
 224
 225     ctx_pic->bitstream_size = 0;
 226     ctx_pic->bitstream      = NULL;
 227     return 0;
 228 }
 229
 230 static int decode_slice(AVCodecContext *avctx,
 231                         const uint8_t *buffer, uint32_t size)
 232 {
 233     const VC1Context *v = avctx->priv_data;
 234     const Picture *current_picture = v->s.current_picture_ptr;
 235     struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private;
 236
 237     if (ctx_pic->bitstream_size > 0)
 238         return -1;
 239
 240     if (avctx->codec_id == CODEC_ID_VC1 &&
 241         size >= 4 && IS_MARKER(AV_RB32(buffer))) {
 242         buffer += 4;
 243         size   -= 4;
 244     }
 245
 246     ctx_pic->bitstream_size = size;
 247     ctx_pic->bitstream      = buffer;
 248
 249     fill_slice(avctx, &ctx_pic->si, 0, size);
 250     return 0;
 251 }
 252
 253 static int end_frame(AVCodecContext *avctx)
 254 {
 255     VC1Context *v = avctx->priv_data;
 256     struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->f.hwaccel_picture_private;
 257
 258     if (ctx_pic->bitstream_size <= 0)
 259         return -1;
 260
 261     return ff_dxva2_common_end_frame(avctx, &v->s,
 262                                      &ctx_pic->pp, sizeof(ctx_pic->pp),
 263                                      NULL, 0,
 264                                      commit_bitstream_and_slice_buffer);
 265 }
 266
 267 #if CONFIG_WMV3_DXVA2_HWACCEL
 268 AVHWAccel ff_wmv3_dxva2_hwaccel = {
 269     .name           = "wmv3_dxva2",
 270     .type           = AVMEDIA_TYPE_VIDEO,
 271     .id             = CODEC_ID_WMV3,
 272     .pix_fmt        = PIX_FMT_DXVA2_VLD,
 273     .start_frame    = start_frame,
 274     .decode_slice   = decode_slice,
 275     .end_frame      = end_frame,
 276     .priv_data_size = sizeof(struct dxva2_picture_context),
 277 };
 278 #endif
 279
 280 AVHWAccel ff_vc1_dxva2_hwaccel = {
 281     .name           = "vc1_dxva2",
 282     .type           = AVMEDIA_TYPE_VIDEO,
 283     .id             = CODEC_ID_VC1,
 284     .pix_fmt        = PIX_FMT_DXVA2_VLD,
 285     .start_frame    = start_frame,
 286     .decode_slice   = decode_slice,
 287     .end_frame      = end_frame,
 288     .priv_data_size = sizeof(struct dxva2_picture_context),
 289 };