D3D11va: add a Direct3D11 video decoder similar to DXVA2
[libav.git] / libavcodec / dxva2_hevc.c
1 /*
2 * DXVA2 HEVC HW acceleration.
3 *
4 * copyright (c) 2014 - 2015 Hendrik Leppkes
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 "libavutil/avassert.h"
24
25 #include "dxva2_internal.h"
26 #include "hevc.h"
27
28 #define MAX_SLICES 256
29
30 struct hevc_dxva2_picture_context {
31 DXVA_PicParams_HEVC pp;
32 DXVA_Qmatrix_HEVC qm;
33 unsigned slice_count;
34 DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
35 const uint8_t *bitstream;
36 unsigned bitstream_size;
37 };
38
39 static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
40 unsigned index, unsigned flag)
41 {
42 av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
43 pic->bPicEntry = index | (flag << 7);
44 }
45
46 static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
47 {
48 int i;
49 for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
50 if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
51 return i;
52 }
53 return 0xff;
54 }
55
56 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
57 DXVA_PicParams_HEVC *pp)
58 {
59 const HEVCFrame *current_picture = h->ref;
60 int i, j, k;
61
62 memset(pp, 0, sizeof(*pp));
63
64 pp->PicWidthInMinCbsY = h->sps->min_cb_width;
65 pp->PicHeightInMinCbsY = h->sps->min_cb_height;
66
67 pp->wFormatAndSequenceInfoFlags = (h->sps->chroma_format_idc << 0) |
68 (h->sps->separate_colour_plane_flag << 2) |
69 ((h->sps->bit_depth - 8) << 3) |
70 ((h->sps->bit_depth - 8) << 6) |
71 ((h->sps->log2_max_poc_lsb - 4) << 9) |
72 (0 << 13) |
73 (0 << 14) |
74 (0 << 15);
75
76 fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
77
78 pp->sps_max_dec_pic_buffering_minus1 = h->sps->temporal_layer[h->sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
79 pp->log2_min_luma_coding_block_size_minus3 = h->sps->log2_min_cb_size - 3;
80 pp->log2_diff_max_min_luma_coding_block_size = h->sps->log2_diff_max_min_coding_block_size;
81 pp->log2_min_transform_block_size_minus2 = h->sps->log2_min_tb_size - 2;
82 pp->log2_diff_max_min_transform_block_size = h->sps->log2_max_trafo_size - h->sps->log2_min_tb_size;
83 pp->max_transform_hierarchy_depth_inter = h->sps->max_transform_hierarchy_depth_inter;
84 pp->max_transform_hierarchy_depth_intra = h->sps->max_transform_hierarchy_depth_intra;
85 pp->num_short_term_ref_pic_sets = h->sps->nb_st_rps;
86 pp->num_long_term_ref_pics_sps = h->sps->num_long_term_ref_pics_sps;
87
88 pp->num_ref_idx_l0_default_active_minus1 = h->pps->num_ref_idx_l0_default_active - 1;
89 pp->num_ref_idx_l1_default_active_minus1 = h->pps->num_ref_idx_l1_default_active - 1;
90 pp->init_qp_minus26 = h->pps->pic_init_qp_minus26;
91
92 if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
93 pp->ucNumDeltaPocsOfRefRpsIdx = h->sh.short_term_rps->num_delta_pocs;
94 pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
95 }
96
97 pp->dwCodingParamToolFlags = (h->sps->scaling_list_enable_flag << 0) |
98 (h->sps->amp_enabled_flag << 1) |
99 (h->sps->sao_enabled << 2) |
100 (h->sps->pcm_enabled_flag << 3) |
101 ((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth - 1) : 0) << 4) |
102 ((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
103 ((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
104 ((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_max_pcm_cb_size - h->sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
105 (h->sps->pcm.loop_filter_disable_flag << 16) |
106 (h->sps->long_term_ref_pics_present_flag << 17) |
107 (h->sps->sps_temporal_mvp_enabled_flag << 18) |
108 (h->sps->sps_strong_intra_smoothing_enable_flag << 19) |
109 (h->pps->dependent_slice_segments_enabled_flag << 20) |
110 (h->pps->output_flag_present_flag << 21) |
111 (h->pps->num_extra_slice_header_bits << 22) |
112 (h->pps->sign_data_hiding_flag << 25) |
113 (h->pps->cabac_init_present_flag << 26) |
114 (0 << 27);
115
116 pp->dwCodingSettingPicturePropertyFlags = (h->pps->constrained_intra_pred_flag << 0) |
117 (h->pps->transform_skip_enabled_flag << 1) |
118 (h->pps->cu_qp_delta_enabled_flag << 2) |
119 (h->pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
120 (h->pps->weighted_pred_flag << 4) |
121 (h->pps->weighted_bipred_flag << 5) |
122 (h->pps->transquant_bypass_enable_flag << 6) |
123 (h->pps->tiles_enabled_flag << 7) |
124 (h->pps->entropy_coding_sync_enabled_flag << 8) |
125 (h->pps->uniform_spacing_flag << 9) |
126 ((h->pps->tiles_enabled_flag ? h->pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
127 (h->pps->seq_loop_filter_across_slices_enabled_flag << 11) |
128 (h->pps->deblocking_filter_override_enabled_flag << 12) |
129 (h->pps->disable_dbf << 13) |
130 (h->pps->lists_modification_present_flag << 14) |
131 (h->pps->slice_header_extension_present_flag << 15) |
132 (IS_IRAP(h) << 16) |
133 (IS_IDR(h) << 17) |
134 /* IntraPicFlag */
135 (IS_IRAP(h) << 18) |
136 (0 << 19);
137 pp->pps_cb_qp_offset = h->pps->cb_qp_offset;
138 pp->pps_cr_qp_offset = h->pps->cr_qp_offset;
139 if (h->pps->tiles_enabled_flag) {
140 pp->num_tile_columns_minus1 = h->pps->num_tile_columns - 1;
141 pp->num_tile_rows_minus1 = h->pps->num_tile_rows - 1;
142
143 if (!h->pps->uniform_spacing_flag) {
144 for (i = 0; i < h->pps->num_tile_columns; i++)
145 pp->column_width_minus1[i] = h->pps->column_width[i] - 1;
146
147 for (i = 0; i < h->pps->num_tile_rows; i++)
148 pp->row_height_minus1[i] = h->pps->row_height[i] - 1;
149 }
150 }
151
152 pp->diff_cu_qp_delta_depth = h->pps->diff_cu_qp_delta_depth;
153 pp->pps_beta_offset_div2 = h->pps->beta_offset / 2;
154 pp->pps_tc_offset_div2 = h->pps->tc_offset / 2;
155 pp->log2_parallel_merge_level_minus2 = h->pps->log2_parallel_merge_level - 2;
156 pp->CurrPicOrderCntVal = h->poc;
157
158 // empty the lists
159 memset(&pp->RefPicList, 0xff, sizeof(pp->RefPicList));
160 memset(&pp->RefPicSetStCurrBefore, 0xff, sizeof(pp->RefPicSetStCurrBefore));
161 memset(&pp->RefPicSetStCurrAfter, 0xff, sizeof(pp->RefPicSetStCurrAfter));
162 memset(&pp->RefPicSetLtCurr, 0xff, sizeof(pp->RefPicSetLtCurr));
163
164 // fill RefPicList from the DPB
165 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(h->DPB); i++) {
166 const HEVCFrame *frame = &h->DPB[i];
167 if (frame != current_picture && (frame->flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF))) {
168 fill_picture_entry(&pp->RefPicList[j], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
169 pp->PicOrderCntValList[j] = frame->poc;
170 j++;
171 }
172 }
173
174 #define DO_REF_LIST(ref_idx, ref_list) { \
175 const RefPicList *rpl = &h->rps[ref_idx]; \
176 av_assert0(rpl->nb_refs <= FF_ARRAY_ELEMS(pp->ref_list)); \
177 for (j = 0, k = 0; j < rpl->nb_refs; j++) { \
178 if (rpl->ref[j]) { \
179 pp->ref_list[k] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, rpl->ref[j]->frame)); \
180 k++; \
181 } \
182 } \
183 }
184
185 // Fill short term and long term lists
186 DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
187 DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
188 DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
189
190 pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
191 }
192
193 static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
194 {
195 unsigned i, j, pos;
196 const ScalingList *sl = h->pps->scaling_list_data_present_flag ?
197 &h->pps->scaling_list : &h->sps->scaling_list;
198
199 memset(qm, 0, sizeof(*qm));
200 for (i = 0; i < 6; i++) {
201 for (j = 0; j < 16; j++) {
202 pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
203 qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
204 }
205
206 for (j = 0; j < 64; j++) {
207 pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
208 qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
209 qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
210
211 if (i < 2)
212 qm->ucScalingLists3[i][j] = sl->sl[3][i][pos];
213 }
214
215 qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
216 if (i < 2)
217 qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i];
218 }
219 }
220
221 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
222 unsigned position, unsigned size)
223 {
224 memset(slice, 0, sizeof(*slice));
225 slice->BSNALunitDataLocation = position;
226 slice->SliceBytesInBuffer = size;
227 slice->wBadSliceChopping = 0;
228 }
229
230 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
231 DECODER_BUFFER_DESC *bs,
232 DECODER_BUFFER_DESC *sc)
233 {
234 const HEVCContext *h = avctx->priv_data;
235 AVDXVAContext *ctx = avctx->hwaccel_context;
236 const HEVCFrame *current_picture = h->ref;
237 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
238 DXVA_Slice_HEVC_Short *slice = NULL;
239 void *dxva_data_ptr;
240 uint8_t *dxva_data, *current, *end;
241 unsigned dxva_size;
242 void *slice_data;
243 unsigned slice_size;
244 unsigned padding;
245 unsigned i;
246 unsigned type;
247
248 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
249 #if CONFIG_D3D11VA
250 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
251 type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
252 if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
253 D3D11VA_CONTEXT(ctx)->decoder,
254 type,
255 &dxva_size, &dxva_data_ptr)))
256 return -1;
257 }
258 #endif
259 #if CONFIG_DXVA2
260 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
261 type = DXVA2_BitStreamDateBufferType;
262 if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
263 type,
264 &dxva_data_ptr, &dxva_size)))
265 return -1;
266 }
267 #endif
268
269 dxva_data = dxva_data_ptr;
270 current = dxva_data;
271 end = dxva_data + dxva_size;
272
273 for (i = 0; i < ctx_pic->slice_count; i++) {
274 static const uint8_t start_code[] = { 0, 0, 1 };
275 static const unsigned start_code_size = sizeof(start_code);
276 unsigned position, size;
277
278 slice = &ctx_pic->slice_short[i];
279
280 position = slice->BSNALunitDataLocation;
281 size = slice->SliceBytesInBuffer;
282 if (start_code_size + size > end - current) {
283 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
284 break;
285 }
286
287 slice->BSNALunitDataLocation = current - dxva_data;
288 slice->SliceBytesInBuffer = start_code_size + size;
289
290 memcpy(current, start_code, start_code_size);
291 current += start_code_size;
292
293 memcpy(current, &ctx_pic->bitstream[position], size);
294 current += size;
295 }
296 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
297 if (slice && padding > 0) {
298 memset(current, 0, padding);
299 current += padding;
300
301 slice->SliceBytesInBuffer += padding;
302 }
303 #if CONFIG_D3D11VA
304 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD)
305 if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
306 return -1;
307 #endif
308 #if CONFIG_DXVA2
309 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
310 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
311 return -1;
312 #endif
313 if (i < ctx_pic->slice_count)
314 return -1;
315
316 #if CONFIG_D3D11VA
317 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
318 D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
319 memset(dsc11, 0, sizeof(*dsc11));
320 dsc11->BufferType = type;
321 dsc11->DataSize = current - dxva_data;
322 dsc11->NumMBsInBuffer = 0;
323
324 type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
325 }
326 #endif
327 #if CONFIG_DXVA2
328 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
329 DXVA2_DecodeBufferDesc *dsc2 = bs;
330 memset(dsc2, 0, sizeof(*dsc2));
331 dsc2->CompressedBufferType = type;
332 dsc2->DataSize = current - dxva_data;
333 dsc2->NumMBsInBuffer = 0;
334
335 type = DXVA2_SliceControlBufferType;
336 }
337 #endif
338
339 slice_data = ctx_pic->slice_short;
340 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
341
342 av_assert0(((current - dxva_data) & 127) == 0);
343 return ff_dxva2_commit_buffer(avctx, ctx, sc,
344 type,
345 slice_data, slice_size, 0);
346 }
347
348
349 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
350 av_unused const uint8_t *buffer,
351 av_unused uint32_t size)
352 {
353 const HEVCContext *h = avctx->priv_data;
354 AVDXVAContext *ctx = avctx->hwaccel_context;
355 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
356
357 if (DXVA_CONTEXT_DECODER(avctx, ctx) == NULL ||
358 DXVA_CONTEXT_CFG(avctx, ctx) == NULL ||
359 DXVA_CONTEXT_COUNT(avctx, ctx) <= 0)
360 return -1;
361 av_assert0(ctx_pic);
362
363 /* Fill up DXVA_PicParams_HEVC */
364 fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
365
366 /* Fill up DXVA_Qmatrix_HEVC */
367 fill_scaling_lists(ctx, h, &ctx_pic->qm);
368
369 ctx_pic->slice_count = 0;
370 ctx_pic->bitstream_size = 0;
371 ctx_pic->bitstream = NULL;
372 return 0;
373 }
374
375 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
376 const uint8_t *buffer,
377 uint32_t size)
378 {
379 const HEVCContext *h = avctx->priv_data;
380 const HEVCFrame *current_picture = h->ref;
381 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
382 unsigned position;
383
384 if (ctx_pic->slice_count >= MAX_SLICES)
385 return -1;
386
387 if (!ctx_pic->bitstream)
388 ctx_pic->bitstream = buffer;
389 ctx_pic->bitstream_size += size;
390
391 position = buffer - ctx_pic->bitstream;
392 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
393 ctx_pic->slice_count++;
394
395 return 0;
396 }
397
398 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
399 {
400 HEVCContext *h = avctx->priv_data;
401 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
402 int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
403 int ret;
404
405 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
406 return -1;
407
408 ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
409 &ctx_pic->pp, sizeof(ctx_pic->pp),
410 scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
411 commit_bitstream_and_slice_buffer);
412 return ret;
413 }
414
415 #if CONFIG_HEVC_DXVA2_HWACCEL
416 AVHWAccel ff_hevc_dxva2_hwaccel = {
417 .name = "hevc_dxva2",
418 .type = AVMEDIA_TYPE_VIDEO,
419 .id = AV_CODEC_ID_HEVC,
420 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
421 .start_frame = dxva2_hevc_start_frame,
422 .decode_slice = dxva2_hevc_decode_slice,
423 .end_frame = dxva2_hevc_end_frame,
424 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
425 };
426 #endif
427
428 #if CONFIG_HEVC_D3D11VA_HWACCEL
429 AVHWAccel ff_hevc_d3d11va_hwaccel = {
430 .name = "hevc_d3d11va",
431 .type = AVMEDIA_TYPE_VIDEO,
432 .id = AV_CODEC_ID_HEVC,
433 .pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
434 .start_frame = dxva2_hevc_start_frame,
435 .decode_slice = dxva2_hevc_decode_slice,
436 .end_frame = dxva2_hevc_end_frame,
437 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
438 };
439 #endif