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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 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 
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 && !v->bi_type)
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 && !v->bi_type)
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 && v->second_field;
72  pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I || v->bi_type;
73  pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
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 = ((!pp->bPicBackwardPrediction && v->overlap) << 6) |
105  ((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
106  (s->loop_filter << 1);
107  pp->bPicDeblockConfined = (v->postprocflag << 7) |
108  (v->broadcast << 6) |
109  (v->interlace << 5) |
110  (v->tfcntrflag << 4) |
111  (v->finterpflag << 3) |
112  ((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
113  (v->psf << 1) |
114  (v->extended_dmv );
115  if (s->pict_type != AV_PICTURE_TYPE_I)
116  pp->bPic4MVallowed = v->mv_mode == MV_PMODE_MIXED_MV ||
119  if (v->profile == PROFILE_ADVANCED)
120  pp->bPicOBMC = (v->range_mapy_flag << 7) |
121  (v->range_mapy << 4) |
122  (v->range_mapuv_flag << 3) |
123  (v->range_mapuv );
124  pp->bPicBinPB = 0;
125  pp->bMV_RPS = 0;
126  pp->bReservedBits = 0;
127  if (s->picture_structure == PICT_FRAME) {
128  pp->wBitstreamFcodes = v->lumscale;
129  pp->wBitstreamPCEelements = v->lumshift;
130  } else {
131  /* Syntax: (top_field_param << 8) | bottom_field_param */
132  pp->wBitstreamFcodes = (v->lumscale << 8) | v->lumscale;
133  pp->wBitstreamPCEelements = (v->lumshift << 8) | v->lumshift;
134  }
135  pp->bBitstreamConcealmentNeed = 0;
136  pp->bBitstreamConcealmentMethod = 0;
137 }
138 
139 static void fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
140  unsigned position, unsigned size)
141 {
142  const VC1Context *v = avctx->priv_data;
143  const MpegEncContext *s = &v->s;
144 
145  memset(slice, 0, sizeof(*slice));
146  slice->wHorizontalPosition = 0;
147  slice->wVerticalPosition = s->mb_y;
148  slice->dwSliceBitsInBuffer = 8 * size;
149  slice->dwSliceDataLocation = position;
150  slice->bStartCodeBitOffset = 0;
151  slice->bReservedBits = 0;
152  slice->wMBbitOffset = get_bits_count(&s->gb);
153  slice->wNumberMBsInSlice = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
154  slice->wQuantizerScaleCode = v->pq;
155  slice->wBadSliceChopping = 0;
156 }
157 
159  DXVA2_DecodeBufferDesc *bs,
160  DXVA2_DecodeBufferDesc *sc)
161 {
162  const VC1Context *v = avctx->priv_data;
163  struct dxva_context *ctx = avctx->hwaccel_context;
164  const MpegEncContext *s = &v->s;
166 
167  DXVA_SliceInfo *slice = &ctx_pic->si;
168 
169  static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
170  const unsigned start_code_size = avctx->codec_id == AV_CODEC_ID_VC1 ? sizeof(start_code) : 0;
171  const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
172  const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
173  const unsigned data_size = start_code_size + slice_size + padding;
174 
175  uint8_t *dxva_data;
176  unsigned dxva_size;
177  int result;
178 
179  if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
180  DXVA2_BitStreamDateBufferType,
181  (void **)&dxva_data, &dxva_size)))
182  return -1;
183 
184  result = data_size <= dxva_size ? 0 : -1;
185  if (!result) {
186  if (start_code_size > 0) {
187  memcpy(dxva_data, start_code, start_code_size);
188  if (v->second_field)
189  dxva_data[3] = 0x0c;
190  }
191  memcpy(dxva_data + start_code_size,
192  ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
193  if (padding > 0)
194  memset(dxva_data + start_code_size + slice_size, 0, padding);
195  slice->dwSliceBitsInBuffer = 8 * data_size;
196  }
197  if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
198  DXVA2_BitStreamDateBufferType)))
199  return -1;
200  if (result)
201  return result;
202 
203  memset(bs, 0, sizeof(*bs));
204  bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
205  bs->DataSize = data_size;
206  bs->NumMBsInBuffer = s->mb_width * s->mb_height;
207  assert((bs->DataSize & 127) == 0);
208 
209  return ff_dxva2_commit_buffer(avctx, ctx, sc,
210  DXVA2_SliceControlBufferType,
211  slice, sizeof(*slice), bs->NumMBsInBuffer);
212 }
213 
214 static int start_frame(AVCodecContext *avctx,
215  av_unused const uint8_t *buffer,
216  av_unused uint32_t size)
217 {
218  const VC1Context *v = avctx->priv_data;
219  struct dxva_context *ctx = avctx->hwaccel_context;
221 
222  if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
223  return -1;
224  assert(ctx_pic);
225 
226  fill_picture_parameters(avctx, ctx, v, &ctx_pic->pp);
227 
228  ctx_pic->bitstream_size = 0;
229  ctx_pic->bitstream = NULL;
230  return 0;
231 }
232 
233 static int decode_slice(AVCodecContext *avctx,
234  const uint8_t *buffer, uint32_t size)
235 {
236  const VC1Context *v = avctx->priv_data;
237  const Picture *current_picture = v->s.current_picture_ptr;
238  struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private;
239 
240  if (ctx_pic->bitstream_size > 0)
241  return -1;
242 
243  if (avctx->codec_id == AV_CODEC_ID_VC1 &&
244  size >= 4 && IS_MARKER(AV_RB32(buffer))) {
245  buffer += 4;
246  size -= 4;
247  }
248 
249  ctx_pic->bitstream_size = size;
250  ctx_pic->bitstream = buffer;
251 
252  fill_slice(avctx, &ctx_pic->si, 0, size);
253  return 0;
254 }
255 
256 static int end_frame(AVCodecContext *avctx)
257 {
258  VC1Context *v = avctx->priv_data;
260 
261  if (ctx_pic->bitstream_size <= 0)
262  return -1;
263 
264  return ff_dxva2_common_end_frame(avctx, &v->s,
265  &ctx_pic->pp, sizeof(ctx_pic->pp),
266  NULL, 0,
268 }
269 
270 #if CONFIG_WMV3_DXVA2_HWACCEL
271 AVHWAccel ff_wmv3_dxva2_hwaccel = {
272  .name = "wmv3_dxva2",
273  .type = AVMEDIA_TYPE_VIDEO,
274  .id = AV_CODEC_ID_WMV3,
275  .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
276  .start_frame = start_frame,
277  .decode_slice = decode_slice,
278  .end_frame = end_frame,
279  .priv_data_size = sizeof(struct dxva2_picture_context),
280 };
281 #endif
282 
284  .name = "vc1_dxva2",
285  .type = AVMEDIA_TYPE_VIDEO,
286  .id = AV_CODEC_ID_VC1,
287  .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
288  .start_frame = start_frame,
289  .decode_slice = decode_slice,
290  .end_frame = end_frame,
291  .priv_data_size = sizeof(struct dxva2_picture_context),
292 };