dxva2_vc1.c
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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 
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)
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)
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;
68  pp->bPicStructure |= 0x01;
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;
73  pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B;
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 = ((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
105  (s->loop_filter << 1);
106  pp->bPicDeblockConfined = (v->postprocflag << 7) |
107  (v->broadcast << 6) |
108  (v->interlace << 5) |
109  (v->tfcntrflag << 4) |
110  (v->finterpflag << 3) |
111  ((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
112  (v->psf << 1) |
113  (v->extended_dmv );
114  if (s->pict_type != AV_PICTURE_TYPE_I)
115  pp->bPic4MVallowed = v->mv_mode == MV_PMODE_MIXED_MV ||
118  if (v->profile == PROFILE_ADVANCED)
119  pp->bPicOBMC = (v->range_mapy_flag << 7) |
120  (v->range_mapy << 4) |
121  (v->range_mapuv_flag << 3) |
122  (v->range_mapuv );
123  pp->bPicBinPB = 0;
124  pp->bMV_RPS = 0;
125  pp->bReservedBits = 0;
126  if (s->picture_structure == PICT_FRAME) {
127  pp->wBitstreamFcodes = v->lumscale;
128  pp->wBitstreamPCEelements = v->lumshift;
129  } else {
130  /* Syntax: (top_field_param << 8) | bottom_field_param */
131  pp->wBitstreamFcodes = (v->lumscale << 8) | v->lumscale;
132  pp->wBitstreamPCEelements = (v->lumshift << 8) | v->lumshift;
133  }
134  pp->bBitstreamConcealmentNeed = 0;
135  pp->bBitstreamConcealmentMethod = 0;
136 }
137 
138 static void fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
139  unsigned position, unsigned size)
140 {
141  const VC1Context *v = avctx->priv_data;
142  const MpegEncContext *s = &v->s;
143 
144  memset(slice, 0, sizeof(*slice));
145  slice->wHorizontalPosition = 0;
146  slice->wVerticalPosition = s->mb_y;
147  slice->dwSliceBitsInBuffer = 8 * size;
148  slice->dwSliceDataLocation = position;
149  slice->bStartCodeBitOffset = 0;
150  slice->bReservedBits = 0;
151  slice->wMBbitOffset = get_bits_count(&s->gb);
152  slice->wNumberMBsInSlice = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
153  slice->wQuantizerScaleCode = v->pq;
154  slice->wBadSliceChopping = 0;
155 }
156 
158  DXVA2_DecodeBufferDesc *bs,
159  DXVA2_DecodeBufferDesc *sc)
160 {
161  const VC1Context *v = avctx->priv_data;
162  struct dxva_context *ctx = avctx->hwaccel_context;
163  const MpegEncContext *s = &v->s;
165 
166  DXVA_SliceInfo *slice = &ctx_pic->si;
167 
168  static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
169  const unsigned start_code_size = avctx->codec_id == CODEC_ID_VC1 ? sizeof(start_code) : 0;
170  const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
171  const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
172  const unsigned data_size = start_code_size + slice_size + padding;
173 
174  uint8_t *dxva_data;
175  unsigned dxva_size;
176  int result;
177 
178  if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
179  DXVA2_BitStreamDateBufferType,
180  &dxva_data, &dxva_size)))
181  return -1;
182 
183  result = data_size <= dxva_size ? 0 : -1;
184  if (!result) {
185  if (start_code_size > 0)
186  memcpy(dxva_data, start_code, start_code_size);
187  memcpy(dxva_data + start_code_size,
188  ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
189  if (padding > 0)
190  memset(dxva_data + start_code_size + slice_size, 0, padding);
191  slice->dwSliceBitsInBuffer = 8 * data_size;
192  }
193  if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
194  DXVA2_BitStreamDateBufferType)))
195  return -1;
196  if (result)
197  return result;
198 
199  memset(bs, 0, sizeof(*bs));
200  bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
201  bs->DataSize = data_size;
202  bs->NumMBsInBuffer = s->mb_width * s->mb_height;
203  assert((bs->DataSize & 127) == 0);
204 
205  return ff_dxva2_commit_buffer(avctx, ctx, sc,
206  DXVA2_SliceControlBufferType,
207  slice, sizeof(*slice), bs->NumMBsInBuffer);
208 }
209 
210 static int start_frame(AVCodecContext *avctx,
211  av_unused const uint8_t *buffer,
212  av_unused uint32_t size)
213 {
214  const VC1Context *v = avctx->priv_data;
215  struct dxva_context *ctx = avctx->hwaccel_context;
217 
218  if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
219  return -1;
220  assert(ctx_pic);
221 
222  fill_picture_parameters(avctx, ctx, v, &ctx_pic->pp);
223 
224  ctx_pic->bitstream_size = 0;
225  ctx_pic->bitstream = NULL;
226  return 0;
227 }
228 
229 static int decode_slice(AVCodecContext *avctx,
230  const uint8_t *buffer, uint32_t size)
231 {
232  const VC1Context *v = avctx->priv_data;
233  const Picture *current_picture = v->s.current_picture_ptr;
234  struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private;
235 
236  if (ctx_pic->bitstream_size > 0)
237  return -1;
238 
239  if (avctx->codec_id == CODEC_ID_VC1 &&
240  size >= 4 && IS_MARKER(AV_RB32(buffer))) {
241  buffer += 4;
242  size -= 4;
243  }
244 
245  ctx_pic->bitstream_size = size;
246  ctx_pic->bitstream = buffer;
247 
248  fill_slice(avctx, &ctx_pic->si, 0, size);
249  return 0;
250 }
251 
252 static int end_frame(AVCodecContext *avctx)
253 {
254  VC1Context *v = avctx->priv_data;
256 
257  if (ctx_pic->bitstream_size <= 0)
258  return -1;
259 
260  return ff_dxva2_common_end_frame(avctx, &v->s,
261  &ctx_pic->pp, sizeof(ctx_pic->pp),
262  NULL, 0,
264 }
265 
266 #if CONFIG_WMV3_DXVA2_HWACCEL
267 AVHWAccel ff_wmv3_dxva2_hwaccel = {
268  .name = "wmv3_dxva2",
269  .type = AVMEDIA_TYPE_VIDEO,
270  .id = CODEC_ID_WMV3,
271  .pix_fmt = PIX_FMT_DXVA2_VLD,
272  .start_frame = start_frame,
273  .decode_slice = decode_slice,
274  .end_frame = end_frame,
275  .priv_data_size = sizeof(struct dxva2_picture_context),
276 };
277 #endif
278 
280  .name = "vc1_dxva2",
281  .type = AVMEDIA_TYPE_VIDEO,
282  .id = CODEC_ID_VC1,
283  .pix_fmt = PIX_FMT_DXVA2_VLD,
284  .start_frame = start_frame,
285  .decode_slice = decode_slice,
286  .end_frame = end_frame,
287  .priv_data_size = sizeof(struct dxva2_picture_context),
288 };
289