code.vuplus.com Git - vuplus_xbmc/blob - lib/ffmpeg/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 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 "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     BYTE bPicIntra = s->pict_type == AV_PICTURE_TYPE_I || v->bi_type == 1;
  42     BYTE bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B && v->bi_type == 0;
  43     int intcomp = 0;
  44
  45     // determine if intensity compensation is needed
  46     if (s->pict_type == AV_PICTURE_TYPE_P) {
  47       if ((v->fcm == ILACE_FRAME && v->intcomp) || (v->fcm != ILACE_FRAME && v->mv_mode == MV_PMODE_INTENSITY_COMP)) {
  48         if (v->lumscale != 32 || v->lumshift != 0 || (s->picture_structure != PICT_FRAME && (v->lumscale2 != 32 && v->lumshift2 != 0)))
  49           intcomp = 1;
  50       }
  51     }
  52
  53     memset(pp, 0, sizeof(*pp));
  54     pp->wDecodedPictureIndex    =
  55     pp->wDeblockedPictureIndex  = ff_dxva2_get_surface_index(ctx, current_picture);
  56     if (!bPicIntra)
  57         pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->last_picture);
  58     else
  59         pp->wForwardRefPictureIndex = 0xffff;
  60     if (bPicBackwardPrediction)
  61         pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->next_picture);
  62     else
  63         pp->wBackwardRefPictureIndex = 0xffff;
  64     if (v->profile == PROFILE_ADVANCED) {
  65         /* It is the cropped width/height -1 of the frame */
  66         pp->wPicWidthInMBminus1 = avctx->width  - 1;
  67         pp->wPicHeightInMBminus1= avctx->height - 1;
  68     } else {
  69         /* It is the coded width/height in macroblock -1 of the frame */
  70         pp->wPicWidthInMBminus1 = s->mb_width  - 1;
  71         pp->wPicHeightInMBminus1= s->mb_height - 1;
  72     }
  73     pp->bMacroblockWidthMinus1  = 15;
  74     pp->bMacroblockHeightMinus1 = 15;
  75     pp->bBlockWidthMinus1       = 7;
  76     pp->bBlockHeightMinus1      = 7;
  77     pp->bBPPminus1              = 7;
  78     if (s->picture_structure & PICT_TOP_FIELD)
  79         pp->bPicStructure      |= 0x01;
  80     if (s->picture_structure & PICT_BOTTOM_FIELD)
  81         pp->bPicStructure      |= 0x02;
  82     pp->bSecondField            = v->interlace && v->fcm == ILACE_FIELD && v->second_field;
  83     pp->bPicIntra               = bPicIntra;
  84     pp->bPicBackwardPrediction  = bPicBackwardPrediction;
  85     pp->bBidirectionalAveragingMode = (1                                           << 7) |
  86                                       ((ctx->cfg->ConfigIntraResidUnsigned != 0)   << 6) |
  87                                       ((ctx->cfg->ConfigResidDiffAccelerator != 0) << 5) |
  88                                       (intcomp                                     << 4) |
  89                                       ((v->profile == PROFILE_ADVANCED)            << 3);
  90     pp->bMVprecisionAndChromaRelation = ((v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) << 3) |
  91                                         (1                                       << 2) |
  92                                         (0                                       << 1) |
  93                                         (!s->quarter_sample                          );
  94     pp->bChromaFormat           = v->chromaformat;
  95     ctx->report_id++;
  96     if (ctx->report_id >= (1 << 16))
  97         ctx->report_id = 1;
  98     pp->bPicScanFixed           = ctx->report_id >> 8;
  99     pp->bPicScanMethod          = ctx->report_id & 0xff;
 100     pp->bPicReadbackRequests    = 0;
 101     pp->bRcontrol               = v->rnd;
 102     pp->bPicSpatialResid8       = (v->panscanflag  << 7) |
 103                                   (v->refdist_flag << 6) |
 104                                   (s->loop_filter  << 5) |
 105                                   (v->fastuvmc     << 4) |
 106                                   (v->extended_mv  << 3) |
 107                                   (v->dquant       << 1) |
 108                                   (v->vstransform      );
 109     pp->bPicOverflowBlocks      = (v->quantizer_mode << 6) |
 110                                   (v->multires       << 5) |
 111                                   (s->resync_marker  << 4) |
 112                                   (v->rangered       << 3) |
 113                                   (s->max_b_frames       );
 114     pp->bPicExtrapolation       = (!v->interlace || v->fcm == PROGRESSIVE) ? 1 : 2;
 115     pp->bPicDeblocked           = ((v->overlap == 1 &&
 116                                   pp->bPicBackwardPrediction == 0 &&
 117                                   ctx->cfg->ConfigResidDiffHost == 0)                 << 6) |
 118                                   ((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
 119                                   (s->loop_filter                                     << 1);
 120     pp->bPicDeblockConfined     = (v->postprocflag             << 7) |
 121                                   (v->broadcast                << 6) |
 122                                   (v->interlace                << 5) |
 123                                   (v->tfcntrflag               << 4) |
 124                                   (v->finterpflag              << 3) |
 125                                   ((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
 126                                   (v->psf                      << 1) |
 127                                   (v->extended_dmv                 );
 128     if (s->pict_type != AV_PICTURE_TYPE_I)
 129         pp->bPic4MVallowed      = v->mv_mode == MV_PMODE_MIXED_MV ||
 130                                   (v->mv_mode == MV_PMODE_INTENSITY_COMP &&
 131                                    v->mv_mode2 == MV_PMODE_MIXED_MV);
 132     if (v->profile == PROFILE_ADVANCED)
 133         pp->bPicOBMC            = (v->range_mapy_flag  << 7) |
 134                                   (v->range_mapy       << 4) |
 135                                   (v->range_mapuv_flag << 3) |
 136                                   (v->range_mapuv          );
 137     pp->bPicBinPB               = 0;
 138     pp->bMV_RPS                 = (v->fcm == ILACE_FIELD && pp->bPicBackwardPrediction) ? v->refdist + 9 : 0;
 139     pp->bReservedBits           = v->pq;
 140     if (s->picture_structure == PICT_FRAME) {
 141         if (intcomp) {
 142             pp->wBitstreamFcodes      = v->lumscale;
 143             pp->wBitstreamPCEelements = v->lumshift;
 144         } else {
 145             pp->wBitstreamFcodes      = 32;
 146             pp->wBitstreamPCEelements = 0;
 147         }
 148     } else {
 149         /* Syntax: (top_field_param << 8) | bottom_field_param */
 150         if (intcomp) {
 151             pp->wBitstreamFcodes      = (v->lumscale << 8) | v->lumscale2;
 152             pp->wBitstreamPCEelements = (v->lumshift << 8) | v->lumshift2;
 153         } else {
 154             pp->wBitstreamFcodes      = (32 << 8) | 32;
 155             pp->wBitstreamPCEelements = 0;
 156         }
 157     }
 158     pp->bBitstreamConcealmentNeed   = 0;
 159     pp->bBitstreamConcealmentMethod = 0;
 160 }
 161
 162 static void fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
 163                        unsigned position, unsigned size)
 164 {
 165     const VC1Context *v = avctx->priv_data;
 166     const MpegEncContext *s = &v->s;
 167
 168     memset(slice, 0, sizeof(*slice));
 169     slice->wHorizontalPosition = 0;
 170     slice->wVerticalPosition   = s->mb_y;
 171     slice->dwSliceBitsInBuffer = 8 * size;
 172     slice->dwSliceDataLocation = position;
 173     slice->bStartCodeBitOffset = 0;
 174     slice->bReservedBits       = (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type) ? v->bfraction_lut_index + 9 : 0;
 175     slice->wMBbitOffset        = v->p_frame_skipped ? 0xffff : get_bits_count(&s->gb);
 176     slice->wNumberMBsInSlice   = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
 177     slice->wQuantizerScaleCode = v->pq;
 178     slice->wBadSliceChopping   = 0;
 179 }
 180
 181 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 182                                              DXVA2_DecodeBufferDesc *bs,
 183                                              DXVA2_DecodeBufferDesc *sc)
 184 {
 185     const VC1Context *v = avctx->priv_data;
 186     struct dxva_context *ctx = avctx->hwaccel_context;
 187     const MpegEncContext *s = &v->s;
 188     struct dxva2_picture_context *ctx_pic = s->current_picture_ptr->f.hwaccel_picture_private;
 189
 190     DXVA_SliceInfo *slice = &ctx_pic->si;
 191
 192     static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
 193     const unsigned start_code_size = avctx->codec_id == AV_CODEC_ID_VC1 ? sizeof(start_code) : 0;
 194     const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
 195     const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
 196     const unsigned data_size = start_code_size + slice_size + padding;
 197
 198     uint8_t  *dxva_data;
 199     unsigned dxva_size;
 200     int result;
 201
 202     if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
 203                                               DXVA2_BitStreamDateBufferType,
 204                                               (void **)&dxva_data, &dxva_size)))
 205         return -1;
 206
 207     result = data_size <= dxva_size ? 0 : -1;
 208     if (!result) {
 209         if (start_code_size > 0) {
 210             memcpy(dxva_data, start_code, start_code_size);
 211             if (v->second_field)
 212                 dxva_data[3] = 0x0c;
 213         }
 214         memcpy(dxva_data + start_code_size,
 215                ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
 216         if (padding > 0)
 217             memset(dxva_data + start_code_size + slice_size, 0, padding);
 218         slice->dwSliceBitsInBuffer = 8 * data_size;
 219     }
 220     if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
 221                                                   DXVA2_BitStreamDateBufferType)))
 222         return -1;
 223     if (result)
 224         return result;
 225
 226     memset(bs, 0, sizeof(*bs));
 227     bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
 228     bs->DataSize             = data_size;
 229     bs->NumMBsInBuffer       = s->mb_width * s->mb_height;
 230     assert((bs->DataSize & 127) == 0);
 231
 232     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 233                                   DXVA2_SliceControlBufferType,
 234                                   slice, sizeof(*slice), bs->NumMBsInBuffer);
 235 }
 236
 237 static int dxva2_vc1_start_frame(AVCodecContext *avctx,
 238                                  av_unused const uint8_t *buffer,
 239                                  av_unused uint32_t size)
 240 {
 241     const VC1Context *v = avctx->priv_data;
 242     struct dxva_context *ctx = avctx->hwaccel_context;
 243     struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->f.hwaccel_picture_private;
 244
 245     if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
 246         return -1;
 247     assert(ctx_pic);
 248
 249     fill_picture_parameters(avctx, ctx, v, &ctx_pic->pp);
 250
 251     ctx_pic->bitstream_size = 0;
 252     ctx_pic->bitstream      = NULL;
 253     return 0;
 254 }
 255
 256 static int dxva2_vc1_decode_slice(AVCodecContext *avctx,
 257                                   const uint8_t *buffer,
 258                                   uint32_t size)
 259 {
 260     const VC1Context *v = avctx->priv_data;
 261     const Picture *current_picture = v->s.current_picture_ptr;
 262     struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private;
 263
 264     if (ctx_pic->bitstream_size > 0)
 265         return -1;
 266
 267     if (avctx->codec_id == AV_CODEC_ID_VC1 &&
 268         size >= 4 && IS_MARKER(AV_RB32(buffer))) {
 269         buffer += 4;
 270         size   -= 4;
 271     }
 272
 273     ctx_pic->bitstream_size = size;
 274     ctx_pic->bitstream      = buffer;
 275
 276     fill_slice(avctx, &ctx_pic->si, 0, size);
 277     return 0;
 278 }
 279
 280 static int dxva2_vc1_end_frame(AVCodecContext *avctx)
 281 {
 282     VC1Context *v = avctx->priv_data;
 283     struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->f.hwaccel_picture_private;
 284     int ret;
 285
 286     if (ctx_pic->bitstream_size <= 0)
 287         return -1;
 288
 289     ret = ff_dxva2_common_end_frame(avctx, v->s.current_picture_ptr,
 290                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 291                                     NULL, 0,
 292                                     commit_bitstream_and_slice_buffer);
 293     if (!ret)
 294         ff_mpeg_draw_horiz_band(&v->s, 0, avctx->height);
 295     return ret;
 296 }
 297
 298 #if CONFIG_WMV3_DXVA2_HWACCEL
 299 AVHWAccel ff_wmv3_dxva2_hwaccel = {
 300     .name           = "wmv3_dxva2",
 301     .type           = AVMEDIA_TYPE_VIDEO,
 302     .id             = AV_CODEC_ID_WMV3,
 303     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 304     .start_frame    = dxva2_vc1_start_frame,
 305     .decode_slice   = dxva2_vc1_decode_slice,
 306     .end_frame      = dxva2_vc1_end_frame,
 307     .priv_data_size = sizeof(struct dxva2_picture_context),
 308 };
 309 #endif
 310
 311 AVHWAccel ff_vc1_dxva2_hwaccel = {
 312     .name           = "vc1_dxva2",
 313     .type           = AVMEDIA_TYPE_VIDEO,
 314     .id             = AV_CODEC_ID_VC1,
 315     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 316     .start_frame    = dxva2_vc1_start_frame,
 317     .decode_slice   = dxva2_vc1_decode_slice,
 318     .end_frame      = dxva2_vc1_end_frame,
 319     .priv_data_size = sizeof(struct dxva2_picture_context),
 320 };