git.sesse.net Git - ffmpeg/blob - 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 "libavutil/log.h"
  24 #include "mpegutils.h"
  25 #include "mpegvideo.h"
  26
  27 // The headers above may include w32threads.h, which uses the original
  28 // _WIN32_WINNT define, while dxva2_internal.h redefines it to target a
  29 // potentially newer version.
  30 #include "dxva2_internal.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 static void fill_picture_parameters(AVCodecContext *avctx,
  44                                     AVDXVAContext *ctx,
  45                                     const struct MpegEncContext *s,
  46                                     DXVA_PictureParameters *pp)
  47 {
  48     const Picture *current_picture = s->current_picture_ptr;
  49     int is_field = s->picture_structure != PICT_FRAME;
  50
  51     memset(pp, 0, sizeof(*pp));
  52     pp->wDecodedPictureIndex         = ff_dxva2_get_surface_index(avctx, ctx, current_picture->f);
  53     pp->wDeblockedPictureIndex       = 0;
  54     if (s->pict_type != AV_PICTURE_TYPE_I)
  55         pp->wForwardRefPictureIndex  = ff_dxva2_get_surface_index(avctx, ctx, s->last_picture.f);
  56     else
  57         pp->wForwardRefPictureIndex  = 0xffff;
  58     if (s->pict_type == AV_PICTURE_TYPE_B)
  59         pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->next_picture.f);
  60     else
  61         pp->wBackwardRefPictureIndex = 0xffff;
  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 static void fill_quantization_matrices(AVCodecContext *avctx,
 110                                        AVDXVAContext *ctx,
 111                                        const struct MpegEncContext *s,
 112                                        DXVA_QmatrixData *qm)
 113 {
 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 static void fill_slice(AVCodecContext *avctx,
 127                        const struct MpegEncContext *s,
 128                        DXVA_SliceInfo *slice,
 129                        unsigned position,
 130                        const uint8_t *buffer, unsigned size)
 131 {
 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 = avctx->hwaccel_context;
 159     struct dxva2_picture_context *ctx_pic =
 160         s->current_picture_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;
 164     uint8_t  *dxva_data, *current, *end;
 165     unsigned dxva_size;
 166     unsigned i;
 167     unsigned type;
 168
 169 #if CONFIG_D3D11VA
 170     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
 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     dxva_data = dxva_data_ptr;
 190     current = dxva_data;
 191     end = dxva_data + dxva_size;
 192
 193     for (i = 0; i < ctx_pic->slice_count; i++) {
 194         DXVA_SliceInfo *slice = &ctx_pic->slice[i];
 195         unsigned position = slice->dwSliceDataLocation;
 196         unsigned size     = slice->dwSliceBitsInBuffer / 8;
 197         if (size > end - current) {
 198             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 199             break;
 200         }
 201         slice->dwSliceDataLocation = current - dxva_data;
 202
 203         if (i < ctx_pic->slice_count - 1)
 204             slice->wNumberMBsInSlice =
 205                 slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
 206         else
 207             slice->wNumberMBsInSlice =
 208                 mb_count - slice[0].wNumberMBsInSlice;
 209
 210         memcpy(current, &ctx_pic->bitstream[position], size);
 211         current += size;
 212     }
 213 #if CONFIG_D3D11VA
 214     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD)
 215         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 216             return -1;
 217 #endif
 218 #if CONFIG_DXVA2
 219     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 220         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 221             return -1;
 222 #endif
 223     if (i < ctx_pic->slice_count)
 224         return -1;
 225
 226 #if CONFIG_D3D11VA
 227     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
 228         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 229         memset(dsc11, 0, sizeof(*dsc11));
 230         dsc11->BufferType           = type;
 231         dsc11->DataSize             = current - dxva_data;
 232         dsc11->NumMBsInBuffer       = mb_count;
 233
 234         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 235     }
 236 #endif
 237 #if CONFIG_DXVA2
 238     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 239         DXVA2_DecodeBufferDesc *dsc2 = bs;
 240         memset(dsc2, 0, sizeof(*dsc2));
 241         dsc2->CompressedBufferType = type;
 242         dsc2->DataSize             = current - dxva_data;
 243         dsc2->NumMBsInBuffer       = mb_count;
 244
 245         type = DXVA2_SliceControlBufferType;
 246     }
 247 #endif
 248
 249     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 250                                   type,
 251                                   ctx_pic->slice,
 252                                   ctx_pic->slice_count * sizeof(*ctx_pic->slice),
 253                                   mb_count);
 254 }
 255
 256 static int dxva2_mpeg2_start_frame(AVCodecContext *avctx,
 257                                    av_unused const uint8_t *buffer,
 258                                    av_unused uint32_t size)
 259 {
 260     const struct MpegEncContext *s = avctx->priv_data;
 261     AVDXVAContext *ctx = avctx->hwaccel_context;
 262     struct dxva2_picture_context *ctx_pic =
 263         s->current_picture_ptr->hwaccel_picture_private;
 264
 265     if (DXVA_CONTEXT_DECODER(avctx, ctx) == NULL ||
 266         DXVA_CONTEXT_CFG(avctx, ctx) == NULL ||
 267         DXVA_CONTEXT_COUNT(avctx, ctx) <= 0)
 268         return -1;
 269     assert(ctx_pic);
 270
 271     fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp);
 272     fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm);
 273
 274     ctx_pic->slice_count    = 0;
 275     ctx_pic->bitstream_size = 0;
 276     ctx_pic->bitstream      = NULL;
 277     return 0;
 278 }
 279
 280 static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx,
 281                                     const uint8_t *buffer, uint32_t size)
 282 {
 283     const struct MpegEncContext *s = avctx->priv_data;
 284     struct dxva2_picture_context *ctx_pic =
 285         s->current_picture_ptr->hwaccel_picture_private;
 286     unsigned position;
 287
 288     if (ctx_pic->slice_count >= MAX_SLICES) {
 289         avpriv_request_sample(avctx, "%d slices in dxva2",
 290                               ctx_pic->slice_count);
 291         return -1;
 292     }
 293     if (!ctx_pic->bitstream)
 294         ctx_pic->bitstream = buffer;
 295     ctx_pic->bitstream_size += size;
 296
 297     position = buffer - ctx_pic->bitstream;
 298     fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position,
 299                buffer, size);
 300     return 0;
 301 }
 302
 303 static int dxva2_mpeg2_end_frame(AVCodecContext *avctx)
 304 {
 305     struct MpegEncContext *s = avctx->priv_data;
 306     struct dxva2_picture_context *ctx_pic =
 307         s->current_picture_ptr->hwaccel_picture_private;
 308     int ret;
 309
 310     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 311         return -1;
 312     ret = ff_dxva2_common_end_frame(avctx, s->current_picture_ptr->f,
 313                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 314                                     &ctx_pic->qm, sizeof(ctx_pic->qm),
 315                                     commit_bitstream_and_slice_buffer);
 316     if (!ret)
 317         ff_mpeg_draw_horiz_band(s, 0, avctx->height);
 318     return ret;
 319 }
 320
 321 #if CONFIG_MPEG2_DXVA2_HWACCEL
 322 AVHWAccel ff_mpeg2_dxva2_hwaccel = {
 323     .name           = "mpeg2_dxva2",
 324     .type           = AVMEDIA_TYPE_VIDEO,
 325     .id             = AV_CODEC_ID_MPEG2VIDEO,
 326     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 327     .start_frame    = dxva2_mpeg2_start_frame,
 328     .decode_slice   = dxva2_mpeg2_decode_slice,
 329     .end_frame      = dxva2_mpeg2_end_frame,
 330     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 331 };
 332 #endif
 333
 334 #if CONFIG_MPEG2_D3D11VA_HWACCEL
 335 AVHWAccel ff_mpeg2_d3d11va_hwaccel = {
 336     .name           = "mpeg2_d3d11va",
 337     .type           = AVMEDIA_TYPE_VIDEO,
 338     .id             = AV_CODEC_ID_MPEG2VIDEO,
 339     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
 340     .start_frame    = dxva2_mpeg2_start_frame,
 341     .decode_slice   = dxva2_mpeg2_decode_slice,
 342     .end_frame      = dxva2_mpeg2_end_frame,
 343     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 344 };
 345 #endif