95a55849be33d9b3890457477156fbbcc2c6dc55
[libav.git] / libavcodec / dxva2_vc1.c
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
35 static void fill_picture_parameters(AVCodecContext *avctx,
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 != FF_I_TYPE)
46 pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->last_picture);
47 else
48 pp->wForwardRefPictureIndex = 0xffff;
49 if (s->pict_type == FF_B_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;
67 if (s->picture_structure & PICT_TOP_FIELD)
68 pp->bPicStructure |= 0x01;
69 if (s->picture_structure & PICT_BOTTOM_FIELD)
70 pp->bPicStructure |= 0x02;
71 pp->bSecondField = v->interlace && v->fcm != 0x03 && !s->first_field;
72 pp->bPicIntra = s->pict_type == FF_I_TYPE;
73 pp->bPicBackwardPrediction = s->pict_type == FF_B_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 == 0x00) ? 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 != FF_B_TYPE) << 2) |
112 (v->psf << 1) |
113 (v->extended_dmv );
114 if (s->pict_type != FF_I_TYPE)
115 pp->bPic4MVallowed = v->mv_mode == MV_PMODE_MIXED_MV ||
116 (v->mv_mode == MV_PMODE_INTENSITY_COMP &&
117 v->mv_mode2 == 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
157 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
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;
164 struct dxva2_picture_context *ctx_pic = s->current_picture_ptr->hwaccel_picture_private;
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;
216 struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;
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->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;
255 struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;
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,
263 commit_bitstream_and_slice_buffer);
264 }
265
266 #if CONFIG_WMV3_DXVA2_HWACCEL
267 AVHWAccel wmv3_dxva2_hwaccel = {
268 .name = "wmv3_dxva2",
269 .type = CODEC_TYPE_VIDEO,
270 .id = CODEC_ID_WMV3,
271 .pix_fmt = PIX_FMT_DXVA2_VLD,
272 .capabilities = 0,
273 .start_frame = start_frame,
274 .decode_slice = decode_slice,
275 .end_frame = end_frame,
276 .priv_data_size = sizeof(struct dxva2_picture_context),
277 };
278 #endif
279
280 AVHWAccel vc1_dxva2_hwaccel = {
281 .name = "vc1_dxva2",
282 .type = CODEC_TYPE_VIDEO,
283 .id = CODEC_ID_VC1,
284 .pix_fmt = PIX_FMT_DXVA2_VLD,
285 .capabilities = 0,
286 .start_frame = start_frame,
287 .decode_slice = decode_slice,
288 .end_frame = end_frame,
289 .priv_data_size = sizeof(struct dxva2_picture_context),
290 };
291