libavcodec/dxva2_mpeg2.c

   1 /*
   2  * MPEG-2 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 "config_components.h"
  24
  25 #include "libavutil/log.h"
  26
  27 #include "dxva2_internal.h"
  28 #include "hwaccel_internal.h"
  29 #include "mpegutils.h"
  30 #include "mpegvideodec.h"
  31
  32 #define MAX_SLICES 1024
  33 struct dxva2_picture_context {
  34     DXVA_PictureParameters pp;
  35     DXVA_QmatrixData       qm;
  36     unsigned               slice_count;
  37     DXVA_SliceInfo         slice[MAX_SLICES];
  38
  39     const uint8_t          *bitstream;
  40     unsigned               bitstream_size;
  41 };
  42
  43 void ff_dxva2_mpeg2_fill_picture_parameters(AVCodecContext *avctx,
  44                                     AVDXVAContext *ctx,
  45                                     DXVA_PictureParameters *pp)
  46 {
  47     const struct MpegEncContext *s = avctx->priv_data;
  48     const MPVPicture *current_picture = s->cur_pic.ptr;
  49     int is_field = s->picture_structure != PICT_FRAME;
  50
  51     memset(pp, 0, sizeof(*pp));
  52     pp->wDeblockedPictureIndex       = 0;
  53     if (s->pict_type != AV_PICTURE_TYPE_I)
  54         pp->wForwardRefPictureIndex  = ff_dxva2_get_surface_index(avctx, ctx, s->last_pic.ptr->f, 0);
  55     else
  56         pp->wForwardRefPictureIndex  = 0xffff;
  57     if (s->pict_type == AV_PICTURE_TYPE_B)
  58         pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->next_pic.ptr->f, 0);
  59     else
  60         pp->wBackwardRefPictureIndex = 0xffff;
  61     pp->wDecodedPictureIndex         = ff_dxva2_get_surface_index(avctx, ctx, current_picture->f, 1);
  62     pp->wPicWidthInMBminus1          = s->mb_width  - 1;
  63     pp->wPicHeightInMBminus1         = (s->mb_height >> is_field) - 1;
  64     pp->bMacroblockWidthMinus1       = 15;
  65     pp->bMacroblockHeightMinus1      = 15;
  66     pp->bBlockWidthMinus1            = 7;
  67     pp->bBlockHeightMinus1           = 7;
  68     pp->bBPPminus1                   = 7;
  69     pp->bPicStructure                = s->picture_structure;
  70     pp->bSecondField                 = is_field && !s->first_field;
  71     pp->bPicIntra                    = s->pict_type == AV_PICTURE_TYPE_I;
  72     pp->bPicBackwardPrediction       = s->pict_type == AV_PICTURE_TYPE_B;
  73     pp->bBidirectionalAveragingMode  = 0;
  74     pp->bMVprecisionAndChromaRelation= 0; /* FIXME */
  75     pp->bChromaFormat                = s->chroma_format;
  76     pp->bPicScanFixed                = 1;
  77     pp->bPicScanMethod               = s->alternate_scan ? 1 : 0;
  78     pp->bPicReadbackRequests         = 0;
  79     pp->bRcontrol                    = 0;
  80     pp->bPicSpatialResid8            = 0;
  81     pp->bPicOverflowBlocks           = 0;
  82     pp->bPicExtrapolation            = 0;
  83     pp->bPicDeblocked                = 0;
  84     pp->bPicDeblockConfined          = 0;
  85     pp->bPic4MVallowed               = 0;
  86     pp->bPicOBMC                     = 0;
  87     pp->bPicBinPB                    = 0;
  88     pp->bMV_RPS                      = 0;
  89     pp->bReservedBits                = 0;
  90     pp->wBitstreamFcodes             = (s->mpeg_f_code[0][0] << 12) |
  91                                        (s->mpeg_f_code[0][1] <<  8) |
  92                                        (s->mpeg_f_code[1][0] <<  4) |
  93                                        (s->mpeg_f_code[1][1]      );
  94     pp->wBitstreamPCEelements        = (s->intra_dc_precision         << 14) |
  95                                        (s->picture_structure          << 12) |
  96                                        (s->top_field_first            << 11) |
  97                                        (s->frame_pred_frame_dct       << 10) |
  98                                        (s->concealment_motion_vectors <<  9) |
  99                                        (s->q_scale_type               <<  8) |
 100                                        (s->intra_vlc_format           <<  7) |
 101                                        (s->alternate_scan             <<  6) |
 102                                        (s->repeat_first_field         <<  5) |
 103                                        (s->chroma_420_type            <<  4) |
 104                                        (s->progressive_frame          <<  3);
 105     pp->bBitstreamConcealmentNeed    = 0;
 106     pp->bBitstreamConcealmentMethod  = 0;
 107 }
 108
 109 void ff_dxva2_mpeg2_fill_quantization_matrices(AVCodecContext *avctx,
 110                                        AVDXVAContext *ctx,
 111                                        DXVA_QmatrixData *qm)
 112 {
 113     const struct MpegEncContext *s = avctx->priv_data;
 114     int i;
 115     for (i = 0; i < 4; i++)
 116         qm->bNewQmatrix[i] = 1;
 117     for (i = 0; i < 64; i++) {
 118         int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
 119         qm->Qmatrix[0][i] = s->intra_matrix[n];
 120         qm->Qmatrix[1][i] = s->inter_matrix[n];
 121         qm->Qmatrix[2][i] = s->chroma_intra_matrix[n];
 122         qm->Qmatrix[3][i] = s->chroma_inter_matrix[n];
 123     }
 124 }
 125
 126 void ff_dxva2_mpeg2_fill_slice(AVCodecContext *avctx,
 127                        DXVA_SliceInfo *slice,
 128                        unsigned position,
 129                        const uint8_t *buffer, unsigned size)
 130 {
 131     const struct MpegEncContext *s = avctx->priv_data;
 132     int is_field = s->picture_structure != PICT_FRAME;
 133     GetBitContext gb;
 134
 135     memset(slice, 0, sizeof(*slice));
 136     slice->wHorizontalPosition = s->mb_x;
 137     slice->wVerticalPosition   = s->mb_y >> is_field;
 138     slice->dwSliceBitsInBuffer = 8 * size;
 139     slice->dwSliceDataLocation = position;
 140     slice->bStartCodeBitOffset = 0;
 141     slice->bReservedBits       = 0;
 142     /* XXX We store the index of the first MB and it will be fixed later */
 143     slice->wNumberMBsInSlice   = (s->mb_y >> is_field) * s->mb_width + s->mb_x;
 144     slice->wBadSliceChopping   = 0;
 145
 146     init_get_bits(&gb, &buffer[4], 8 * (size - 4));
 147
 148     slice->wQuantizerScaleCode = get_bits(&gb, 5);
 149     skip_1stop_8data_bits(&gb);
 150
 151     slice->wMBbitOffset        = 4 * 8 + get_bits_count(&gb);
 152 }
 153 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 154                                              DECODER_BUFFER_DESC *bs,
 155                                              DECODER_BUFFER_DESC *sc)
 156 {
 157     const struct MpegEncContext *s = avctx->priv_data;
 158     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 159     struct dxva2_picture_context *ctx_pic =
 160         s->cur_pic.ptr->hwaccel_picture_private;
 161     const int is_field = s->picture_structure != PICT_FRAME;
 162     const unsigned mb_count = s->mb_width * (s->mb_height >> is_field);
 163     void     *dxva_data_ptr = NULL;
 164     uint8_t  *dxva_data, *current, *end;
 165     unsigned dxva_size;
 166     unsigned i;
 167     unsigned type;
 168
 169 #if CONFIG_D3D11VA
 170     if (ff_dxva2_is_d3d11(avctx)) {
 171         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
 172         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
 173                                                        D3D11VA_CONTEXT(ctx)->decoder,
 174                                                        type,
 175                                                        &dxva_size, &dxva_data_ptr)))
 176             return -1;
 177     }
 178 #endif
 179 #if CONFIG_DXVA2
 180     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 181         type = DXVA2_BitStreamDateBufferType;
 182         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
 183                                                   type,
 184                                                   &dxva_data_ptr, &dxva_size)))
 185             return -1;
 186     }
 187 #endif
 188
 189     if (!dxva_data_ptr)
 190         return -1;
 191
 192     dxva_data = dxva_data_ptr;
 193     current = dxva_data;
 194     end = dxva_data + dxva_size;
 195
 196     for (i = 0; i < ctx_pic->slice_count; i++) {
 197         DXVA_SliceInfo *slice = &ctx_pic->slice[i];
 198         unsigned position = slice->dwSliceDataLocation;
 199         unsigned size     = slice->dwSliceBitsInBuffer / 8;
 200         if (size > end - current) {
 201             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 202             break;
 203         }
 204         slice->dwSliceDataLocation = current - dxva_data;
 205
 206         if (i < ctx_pic->slice_count - 1)
 207             slice->wNumberMBsInSlice =
 208                 slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
 209         else
 210             slice->wNumberMBsInSlice =
 211                 mb_count - slice[0].wNumberMBsInSlice;
 212
 213         memcpy(current, &ctx_pic->bitstream[position], size);
 214         current += size;
 215     }
 216 #if CONFIG_D3D11VA
 217     if (ff_dxva2_is_d3d11(avctx))
 218         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 219             return -1;
 220 #endif
 221 #if CONFIG_DXVA2
 222     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 223         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 224             return -1;
 225 #endif
 226     if (i < ctx_pic->slice_count)
 227         return -1;
 228
 229 #if CONFIG_D3D11VA
 230     if (ff_dxva2_is_d3d11(avctx)) {
 231         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 232         memset(dsc11, 0, sizeof(*dsc11));
 233         dsc11->BufferType           = type;
 234         dsc11->DataSize             = current - dxva_data;
 235         dsc11->NumMBsInBuffer       = mb_count;
 236
 237         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 238     }
 239 #endif
 240 #if CONFIG_DXVA2
 241     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 242         DXVA2_DecodeBufferDesc *dsc2 = bs;
 243         memset(dsc2, 0, sizeof(*dsc2));
 244         dsc2->CompressedBufferType = type;
 245         dsc2->DataSize             = current - dxva_data;
 246         dsc2->NumMBsInBuffer       = mb_count;
 247
 248         type = DXVA2_SliceControlBufferType;
 249     }
 250 #endif
 251
 252     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 253                                   type,
 254                                   ctx_pic->slice,
 255                                   ctx_pic->slice_count * sizeof(*ctx_pic->slice),
 256                                   mb_count);
 257 }
 258
 259 static int dxva2_mpeg2_start_frame(AVCodecContext *avctx,
 260                                    av_unused const uint8_t *buffer,
 261                                    av_unused uint32_t size)
 262 {
 263     const struct MpegEncContext *s = avctx->priv_data;
 264     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 265     struct dxva2_picture_context *ctx_pic =
 266         s->cur_pic.ptr->hwaccel_picture_private;
 267
 268     if (!DXVA_CONTEXT_VALID(avctx, ctx))
 269         return -1;
 270     av_assert0(ctx_pic);
 271
 272     ff_dxva2_mpeg2_fill_picture_parameters(avctx, ctx, &ctx_pic->pp);
 273     ff_dxva2_mpeg2_fill_quantization_matrices(avctx, ctx, &ctx_pic->qm);
 274
 275     ctx_pic->slice_count    = 0;
 276     ctx_pic->bitstream_size = 0;
 277     ctx_pic->bitstream      = NULL;
 278     return 0;
 279 }
 280
 281 static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx,
 282                                     const uint8_t *buffer, uint32_t size)
 283 {
 284     const struct MpegEncContext *s = avctx->priv_data;
 285     struct dxva2_picture_context *ctx_pic =
 286         s->cur_pic.ptr->hwaccel_picture_private;
 287     unsigned position;
 288
 289     if (ctx_pic->slice_count >= MAX_SLICES) {
 290         avpriv_request_sample(avctx, "%d slices in dxva2",
 291                               ctx_pic->slice_count);
 292         return -1;
 293     }
 294     if (!ctx_pic->bitstream)
 295         ctx_pic->bitstream = buffer;
 296     ctx_pic->bitstream_size += size;
 297
 298     position = buffer - ctx_pic->bitstream;
 299     ff_dxva2_mpeg2_fill_slice(avctx, &ctx_pic->slice[ctx_pic->slice_count++], position,
 300                buffer, size);
 301     return 0;
 302 }
 303
 304 static int dxva2_mpeg2_end_frame(AVCodecContext *avctx)
 305 {
 306     struct MpegEncContext *s = avctx->priv_data;
 307     struct dxva2_picture_context *ctx_pic =
 308         s->cur_pic.ptr->hwaccel_picture_private;
 309     int ret;
 310
 311     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 312         return -1;
 313     ret = ff_dxva2_common_end_frame(avctx, s->cur_pic.ptr->f,
 314                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 315                                     &ctx_pic->qm, sizeof(ctx_pic->qm),
 316                                     commit_bitstream_and_slice_buffer);
 317     if (!ret)
 318         ff_mpeg_draw_horiz_band(s, 0, avctx->height);
 319     return ret;
 320 }
 321
 322 #if CONFIG_MPEG2_DXVA2_HWACCEL
 323 const FFHWAccel ff_mpeg2_dxva2_hwaccel = {
 324     .p.name         = "mpeg2_dxva2",
 325     .p.type         = AVMEDIA_TYPE_VIDEO,
 326     .p.id           = AV_CODEC_ID_MPEG2VIDEO,
 327     .p.pix_fmt      = AV_PIX_FMT_DXVA2_VLD,
 328     .init           = ff_dxva2_decode_init,
 329     .uninit         = ff_dxva2_decode_uninit,
 330     .start_frame    = dxva2_mpeg2_start_frame,
 331     .decode_slice   = dxva2_mpeg2_decode_slice,
 332     .end_frame      = dxva2_mpeg2_end_frame,
 333     .frame_params   = ff_dxva2_common_frame_params,
 334     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 335     .priv_data_size = sizeof(FFDXVASharedContext),
 336 };
 337 #endif
 338
 339 #if CONFIG_MPEG2_D3D11VA_HWACCEL
 340 const FFHWAccel ff_mpeg2_d3d11va_hwaccel = {
 341     .p.name         = "mpeg2_d3d11va",
 342     .p.type         = AVMEDIA_TYPE_VIDEO,
 343     .p.id           = AV_CODEC_ID_MPEG2VIDEO,
 344     .p.pix_fmt      = AV_PIX_FMT_D3D11VA_VLD,
 345     .init           = ff_dxva2_decode_init,
 346     .uninit         = ff_dxva2_decode_uninit,
 347     .start_frame    = dxva2_mpeg2_start_frame,
 348     .decode_slice   = dxva2_mpeg2_decode_slice,
 349     .end_frame      = dxva2_mpeg2_end_frame,
 350     .frame_params   = ff_dxva2_common_frame_params,
 351     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 352     .priv_data_size = sizeof(FFDXVASharedContext),
 353 };
 354 #endif
 355
 356 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
 357 const FFHWAccel ff_mpeg2_d3d11va2_hwaccel = {
 358     .p.name         = "mpeg2_d3d11va2",
 359     .p.type         = AVMEDIA_TYPE_VIDEO,
 360     .p.id           = AV_CODEC_ID_MPEG2VIDEO,
 361     .p.pix_fmt      = AV_PIX_FMT_D3D11,
 362     .init           = ff_dxva2_decode_init,
 363     .uninit         = ff_dxva2_decode_uninit,
 364     .start_frame    = dxva2_mpeg2_start_frame,
 365     .decode_slice   = dxva2_mpeg2_decode_slice,
 366     .end_frame      = dxva2_mpeg2_end_frame,
 367     .frame_params   = ff_dxva2_common_frame_params,
 368     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 369     .priv_data_size = sizeof(FFDXVASharedContext),
 370 };
 371 #endif