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