d80bd14e876a11dd5ca364beb3a12fe1e130b156
[libav.git] / libavcodec / dxva2_h264.c
1 /*
2 * DXVA2 H264 HW acceleration.
3 *
4 * copyright (c) 2009 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 "h264.h"
25 #include "h264data.h"
26 #include "mpegutils.h"
27
28 struct dxva2_picture_context {
29 DXVA_PicParams_H264 pp;
30 DXVA_Qmatrix_H264 qm;
31 unsigned slice_count;
32 DXVA_Slice_H264_Short slice_short[MAX_SLICES];
33 DXVA_Slice_H264_Long slice_long[MAX_SLICES];
34 const uint8_t *bitstream;
35 unsigned bitstream_size;
36 };
37
38 static void fill_picture_entry(DXVA_PicEntry_H264 *pic,
39 unsigned index, unsigned flag)
40 {
41 assert((index&0x7f) == index && (flag&0x01) == flag);
42 pic->bPicEntry = index | (flag << 7);
43 }
44
45 static void fill_picture_parameters(struct dxva_context *ctx, const H264Context *h,
46 DXVA_PicParams_H264 *pp)
47 {
48 const H264Picture *current_picture = h->cur_pic_ptr;
49 int i, j;
50
51 memset(pp, 0, sizeof(*pp));
52 /* Configure current picture */
53 fill_picture_entry(&pp->CurrPic,
54 ff_dxva2_get_surface_index(ctx, &current_picture->f),
55 h->picture_structure == PICT_BOTTOM_FIELD);
56 /* Configure the set of references */
57 pp->UsedForReferenceFlags = 0;
58 pp->NonExistingFrameFlags = 0;
59 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
60 const H264Picture *r;
61 if (j < h->short_ref_count) {
62 r = h->short_ref[j++];
63 } else {
64 r = NULL;
65 while (!r && j < h->short_ref_count + 16)
66 r = h->long_ref[j++ - h->short_ref_count];
67 }
68 if (r) {
69 fill_picture_entry(&pp->RefFrameList[i],
70 ff_dxva2_get_surface_index(ctx, &r->f),
71 r->long_ref != 0);
72
73 if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
74 pp->FieldOrderCntList[i][0] = r->field_poc[0];
75 if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
76 pp->FieldOrderCntList[i][1] = r->field_poc[1];
77
78 pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
79 if (r->reference & PICT_TOP_FIELD)
80 pp->UsedForReferenceFlags |= 1 << (2*i + 0);
81 if (r->reference & PICT_BOTTOM_FIELD)
82 pp->UsedForReferenceFlags |= 1 << (2*i + 1);
83 } else {
84 pp->RefFrameList[i].bPicEntry = 0xff;
85 pp->FieldOrderCntList[i][0] = 0;
86 pp->FieldOrderCntList[i][1] = 0;
87 pp->FrameNumList[i] = 0;
88 }
89 }
90
91 pp->wFrameWidthInMbsMinus1 = h->mb_width - 1;
92 pp->wFrameHeightInMbsMinus1 = h->mb_height - 1;
93 pp->num_ref_frames = h->sps.ref_frame_count;
94
95 pp->wBitFields = ((h->picture_structure != PICT_FRAME) << 0) |
96 ((h->sps.mb_aff &&
97 (h->picture_structure == PICT_FRAME)) << 1) |
98 (h->sps.residual_color_transform_flag << 2) |
99 /* sp_for_switch_flag (not implemented by Libav) */
100 (0 << 3) |
101 (h->sps.chroma_format_idc << 4) |
102 ((h->nal_ref_idc != 0) << 6) |
103 (h->pps.constrained_intra_pred << 7) |
104 (h->pps.weighted_pred << 8) |
105 (h->pps.weighted_bipred_idc << 9) |
106 /* MbsConsecutiveFlag */
107 (1 << 11) |
108 (h->sps.frame_mbs_only_flag << 12) |
109 (h->pps.transform_8x8_mode << 13) |
110 ((h->sps.level_idc >= 31) << 14) |
111 /* IntraPicFlag (Modified if we detect a non
112 * intra slice in dxva2_h264_decode_slice) */
113 (1 << 15);
114
115 pp->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8;
116 pp->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8;
117 if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
118 pp->Reserved16Bits = 0;
119 else if (ctx->workaround & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
120 pp->Reserved16Bits = 0x34c;
121 else
122 pp->Reserved16Bits = 3; /* FIXME is there a way to detect the right mode ? */
123 pp->StatusReportFeedbackNumber = 1 + ctx->report_id++;
124 pp->CurrFieldOrderCnt[0] = 0;
125 if ((h->picture_structure & PICT_TOP_FIELD) &&
126 current_picture->field_poc[0] != INT_MAX)
127 pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
128 pp->CurrFieldOrderCnt[1] = 0;
129 if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
130 current_picture->field_poc[1] != INT_MAX)
131 pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
132 pp->pic_init_qs_minus26 = h->pps.init_qs - 26;
133 pp->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0];
134 pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
135 pp->ContinuationFlag = 1;
136 pp->pic_init_qp_minus26 = h->pps.init_qp - 26;
137 pp->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1;
138 pp->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1;
139 pp->Reserved8BitsA = 0;
140 pp->frame_num = h->frame_num;
141 pp->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4;
142 pp->pic_order_cnt_type = h->sps.poc_type;
143 if (h->sps.poc_type == 0)
144 pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
145 else if (h->sps.poc_type == 1)
146 pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
147 pp->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag;
148 pp->entropy_coding_mode_flag = h->pps.cabac;
149 pp->pic_order_present_flag = h->pps.pic_order_present;
150 pp->num_slice_groups_minus1 = h->pps.slice_group_count - 1;
151 pp->slice_group_map_type = h->pps.mb_slice_group_map_type;
152 pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
153 pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present;
154 pp->Reserved8BitsB = 0;
155 pp->slice_group_change_rate_minus1= 0; /* XXX not implemented by Libav */
156 //pp->SliceGroupMap[810]; /* XXX not implemented by Libav */
157 }
158
159 static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
160 {
161 unsigned i, j;
162 memset(qm, 0, sizeof(*qm));
163 if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
164 for (i = 0; i < 6; i++)
165 for (j = 0; j < 16; j++)
166 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];
167
168 for (i = 0; i < 64; i++) {
169 qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
170 qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
171 }
172 } else {
173 for (i = 0; i < 6; i++)
174 for (j = 0; j < 16; j++)
175 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];
176
177 for (i = 0; i < 64; i++) {
178 qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
179 qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
180 }
181 }
182 }
183
184 static int is_slice_short(struct dxva_context *ctx)
185 {
186 assert(ctx->cfg->ConfigBitstreamRaw == 1 ||
187 ctx->cfg->ConfigBitstreamRaw == 2);
188 return ctx->cfg->ConfigBitstreamRaw == 2;
189 }
190
191 static void fill_slice_short(DXVA_Slice_H264_Short *slice,
192 unsigned position, unsigned size)
193 {
194 memset(slice, 0, sizeof(*slice));
195 slice->BSNALunitDataLocation = position;
196 slice->SliceBytesInBuffer = size;
197 slice->wBadSliceChopping = 0;
198 }
199
200 static int get_refpic_index(const DXVA_PicParams_H264 *pp, int surface_index)
201 {
202 int i;
203 for (i = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
204 if ((pp->RefFrameList[i].bPicEntry & 0x7f) == surface_index)
205 return i;
206 }
207 return 0x7f;
208 }
209
210 static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
211 const DXVA_PicParams_H264 *pp, unsigned position, unsigned size)
212 {
213 const H264Context *h = avctx->priv_data;
214 struct dxva_context *ctx = avctx->hwaccel_context;
215 unsigned list;
216
217 memset(slice, 0, sizeof(*slice));
218 slice->BSNALunitDataLocation = position;
219 slice->SliceBytesInBuffer = size;
220 slice->wBadSliceChopping = 0;
221
222 slice->first_mb_in_slice = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x;
223 slice->NumMbsForSlice = 0; /* XXX it is set once we have all slices */
224 slice->BitOffsetToSliceData = get_bits_count(&h->gb);
225 slice->slice_type = ff_h264_get_slice_type(h);
226 if (h->slice_type_fixed)
227 slice->slice_type += 5;
228 slice->luma_log2_weight_denom = h->luma_log2_weight_denom;
229 slice->chroma_log2_weight_denom = h->chroma_log2_weight_denom;
230 if (h->list_count > 0)
231 slice->num_ref_idx_l0_active_minus1 = h->ref_count[0] - 1;
232 if (h->list_count > 1)
233 slice->num_ref_idx_l1_active_minus1 = h->ref_count[1] - 1;
234 slice->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2;
235 slice->slice_beta_offset_div2 = h->slice_beta_offset / 2;
236 slice->Reserved8Bits = 0;
237
238 for (list = 0; list < 2; list++) {
239 unsigned i;
240 for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
241 if (list < h->list_count && i < h->ref_count[list]) {
242 const H264Picture *r = &h->ref_list[list][i];
243 unsigned plane;
244 unsigned index;
245 if (ctx->workaround & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
246 index = ff_dxva2_get_surface_index(ctx, &r->f);
247 else
248 index = get_refpic_index(pp, ff_dxva2_get_surface_index(ctx, &r->f));
249 fill_picture_entry(&slice->RefPicList[list][i], index,
250 r->reference == PICT_BOTTOM_FIELD);
251 for (plane = 0; plane < 3; plane++) {
252 int w, o;
253 if (plane == 0 && h->luma_weight_flag[list]) {
254 w = h->luma_weight[i][list][0];
255 o = h->luma_weight[i][list][1];
256 } else if (plane >= 1 && h->chroma_weight_flag[list]) {
257 w = h->chroma_weight[i][list][plane-1][0];
258 o = h->chroma_weight[i][list][plane-1][1];
259 } else {
260 w = 1 << (plane == 0 ? h->luma_log2_weight_denom :
261 h->chroma_log2_weight_denom);
262 o = 0;
263 }
264 slice->Weights[list][i][plane][0] = w;
265 slice->Weights[list][i][plane][1] = o;
266 }
267 } else {
268 unsigned plane;
269 slice->RefPicList[list][i].bPicEntry = 0xff;
270 for (plane = 0; plane < 3; plane++) {
271 slice->Weights[list][i][plane][0] = 0;
272 slice->Weights[list][i][plane][1] = 0;
273 }
274 }
275 }
276 }
277 slice->slice_qs_delta = 0; /* XXX not implemented by Libav */
278 slice->slice_qp_delta = h->qscale - h->pps.init_qp;
279 slice->redundant_pic_cnt = h->redundant_pic_count;
280 if (h->slice_type == AV_PICTURE_TYPE_B)
281 slice->direct_spatial_mv_pred_flag = h->direct_spatial_mv_pred;
282 slice->cabac_init_idc = h->pps.cabac ? h->cabac_init_idc : 0;
283 if (h->deblocking_filter < 2)
284 slice->disable_deblocking_filter_idc = 1 - h->deblocking_filter;
285 else
286 slice->disable_deblocking_filter_idc = h->deblocking_filter;
287 slice->slice_id = h->current_slice - 1;
288 }
289
290 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
291 DXVA2_DecodeBufferDesc *bs,
292 DXVA2_DecodeBufferDesc *sc)
293 {
294 const H264Context *h = avctx->priv_data;
295 const unsigned mb_count = h->mb_width * h->mb_height;
296 struct dxva_context *ctx = avctx->hwaccel_context;
297 const H264Picture *current_picture = h->cur_pic_ptr;
298 struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
299 DXVA_Slice_H264_Short *slice = NULL;
300 uint8_t *dxva_data, *current, *end;
301 unsigned dxva_size;
302 void *slice_data;
303 unsigned slice_size;
304 unsigned padding;
305 unsigned i;
306
307 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
308 if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
309 DXVA2_BitStreamDateBufferType,
310 &dxva_data, &dxva_size)))
311 return -1;
312 current = dxva_data;
313 end = dxva_data + dxva_size;
314
315 for (i = 0; i < ctx_pic->slice_count; i++) {
316 static const uint8_t start_code[] = { 0, 0, 1 };
317 static const unsigned start_code_size = sizeof(start_code);
318 unsigned position, size;
319
320 assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
321 offsetof(DXVA_Slice_H264_Long, BSNALunitDataLocation));
322 assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
323 offsetof(DXVA_Slice_H264_Long, SliceBytesInBuffer));
324
325 if (is_slice_short(ctx))
326 slice = &ctx_pic->slice_short[i];
327 else
328 slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i];
329
330 position = slice->BSNALunitDataLocation;
331 size = slice->SliceBytesInBuffer;
332 if (start_code_size + size > end - current) {
333 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
334 break;
335 }
336
337 slice->BSNALunitDataLocation = current - dxva_data;
338 slice->SliceBytesInBuffer = start_code_size + size;
339
340 if (!is_slice_short(ctx)) {
341 DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
342 if (i < ctx_pic->slice_count - 1)
343 slice_long->NumMbsForSlice =
344 slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
345 else
346 slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
347 }
348
349 memcpy(current, start_code, start_code_size);
350 current += start_code_size;
351
352 memcpy(current, &ctx_pic->bitstream[position], size);
353 current += size;
354 }
355 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
356 if (slice && padding > 0) {
357 memset(current, 0, padding);
358 current += padding;
359
360 slice->SliceBytesInBuffer += padding;
361 }
362 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
363 DXVA2_BitStreamDateBufferType)))
364 return -1;
365 if (i < ctx_pic->slice_count)
366 return -1;
367
368 memset(bs, 0, sizeof(*bs));
369 bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
370 bs->DataSize = current - dxva_data;
371 bs->NumMBsInBuffer = mb_count;
372
373 if (is_slice_short(ctx)) {
374 slice_data = ctx_pic->slice_short;
375 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
376 } else {
377 slice_data = ctx_pic->slice_long;
378 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
379 }
380 assert((bs->DataSize & 127) == 0);
381 return ff_dxva2_commit_buffer(avctx, ctx, sc,
382 DXVA2_SliceControlBufferType,
383 slice_data, slice_size, mb_count);
384 }
385
386
387 static int dxva2_h264_start_frame(AVCodecContext *avctx,
388 av_unused const uint8_t *buffer,
389 av_unused uint32_t size)
390 {
391 const H264Context *h = avctx->priv_data;
392 struct dxva_context *ctx = avctx->hwaccel_context;
393 struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
394
395 if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
396 return -1;
397 assert(ctx_pic);
398
399 /* Fill up DXVA_PicParams_H264 */
400 fill_picture_parameters(ctx, h, &ctx_pic->pp);
401
402 /* Fill up DXVA_Qmatrix_H264 */
403 fill_scaling_lists(ctx, h, &ctx_pic->qm);
404
405 ctx_pic->slice_count = 0;
406 ctx_pic->bitstream_size = 0;
407 ctx_pic->bitstream = NULL;
408 return 0;
409 }
410
411 static int dxva2_h264_decode_slice(AVCodecContext *avctx,
412 const uint8_t *buffer,
413 uint32_t size)
414 {
415 const H264Context *h = avctx->priv_data;
416 struct dxva_context *ctx = avctx->hwaccel_context;
417 const H264Picture *current_picture = h->cur_pic_ptr;
418 struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
419 unsigned position;
420
421 if (ctx_pic->slice_count >= MAX_SLICES)
422 return -1;
423
424 if (!ctx_pic->bitstream)
425 ctx_pic->bitstream = buffer;
426 ctx_pic->bitstream_size += size;
427
428 position = buffer - ctx_pic->bitstream;
429 if (is_slice_short(ctx))
430 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
431 position, size);
432 else
433 fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
434 &ctx_pic->pp, position, size);
435 ctx_pic->slice_count++;
436
437 if (h->slice_type != AV_PICTURE_TYPE_I && h->slice_type != AV_PICTURE_TYPE_SI)
438 ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
439 return 0;
440 }
441
442 static int dxva2_h264_end_frame(AVCodecContext *avctx)
443 {
444 H264Context *h = avctx->priv_data;
445 struct dxva2_picture_context *ctx_pic =
446 h->cur_pic_ptr->hwaccel_picture_private;
447 int ret;
448
449 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
450 return -1;
451 ret = ff_dxva2_common_end_frame(avctx, &h->cur_pic_ptr->f,
452 &ctx_pic->pp, sizeof(ctx_pic->pp),
453 &ctx_pic->qm, sizeof(ctx_pic->qm),
454 commit_bitstream_and_slice_buffer);
455 if (!ret)
456 ff_h264_draw_horiz_band(h, 0, h->avctx->height);
457 return ret;
458 }
459
460 AVHWAccel ff_h264_dxva2_hwaccel = {
461 .name = "h264_dxva2",
462 .type = AVMEDIA_TYPE_VIDEO,
463 .id = AV_CODEC_ID_H264,
464 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
465 .start_frame = dxva2_h264_start_frame,
466 .decode_slice = dxva2_h264_decode_slice,
467 .end_frame = dxva2_h264_end_frame,
468 .priv_data_size = sizeof(struct dxva2_picture_context),
469 };