Add DXVA2 HEVC HWAccel
[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(struct dxva_context *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(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(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(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 + ctx->report_id++;
191 }
192
193 static void fill_scaling_lists(struct dxva_context *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
194 {
195 unsigned i, j;
196 memset(qm, 0, sizeof(*qm));
197 for (i = 0; i < 6; i++) {
198 for (j = 0; j < 16; j++)
199 qm->ucScalingLists0[i][j] = h->pps->scaling_list.sl[0][i][j];
200
201 for (j = 0; j < 64; j++) {
202 qm->ucScalingLists1[i][j] = h->pps->scaling_list.sl[1][i][j];
203 qm->ucScalingLists2[i][j] = h->pps->scaling_list.sl[2][i][j];
204
205 if (i < 2)
206 qm->ucScalingLists3[i][j] = h->pps->scaling_list.sl[3][i][j];
207 }
208
209 qm->ucScalingListDCCoefSizeID2[i] = h->pps->scaling_list.sl_dc[0][i];
210 if (i < 2)
211 qm->ucScalingListDCCoefSizeID3[i] = h->pps->scaling_list.sl_dc[1][i];
212 }
213 }
214
215 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
216 unsigned position, unsigned size)
217 {
218 memset(slice, 0, sizeof(*slice));
219 slice->BSNALunitDataLocation = position;
220 slice->SliceBytesInBuffer = size;
221 slice->wBadSliceChopping = 0;
222 }
223
224 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
225 DXVA2_DecodeBufferDesc *bs,
226 DXVA2_DecodeBufferDesc *sc)
227 {
228 const HEVCContext *h = avctx->priv_data;
229 struct dxva_context *ctx = avctx->hwaccel_context;
230 const HEVCFrame *current_picture = h->ref;
231 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
232 DXVA_Slice_HEVC_Short *slice = NULL;
233 void *dxva_data_ptr;
234 uint8_t *dxva_data, *current, *end;
235 unsigned dxva_size;
236 void *slice_data;
237 unsigned slice_size;
238 unsigned padding;
239 unsigned i;
240
241 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
242 if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
243 DXVA2_BitStreamDateBufferType,
244 &dxva_data_ptr, &dxva_size)))
245 return -1;
246
247 dxva_data = dxva_data_ptr;
248 current = dxva_data;
249 end = dxva_data + dxva_size;
250
251 for (i = 0; i < ctx_pic->slice_count; i++) {
252 static const uint8_t start_code[] = { 0, 0, 1 };
253 static const unsigned start_code_size = sizeof(start_code);
254 unsigned position, size;
255
256 slice = &ctx_pic->slice_short[i];
257
258 position = slice->BSNALunitDataLocation;
259 size = slice->SliceBytesInBuffer;
260 if (start_code_size + size > end - current) {
261 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
262 break;
263 }
264
265 slice->BSNALunitDataLocation = current - dxva_data;
266 slice->SliceBytesInBuffer = start_code_size + size;
267
268 memcpy(current, start_code, start_code_size);
269 current += start_code_size;
270
271 memcpy(current, &ctx_pic->bitstream[position], size);
272 current += size;
273 }
274 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
275 if (slice && padding > 0) {
276 memset(current, 0, padding);
277 current += padding;
278
279 slice->SliceBytesInBuffer += padding;
280 }
281 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
282 DXVA2_BitStreamDateBufferType)))
283 return -1;
284 if (i < ctx_pic->slice_count)
285 return -1;
286
287 memset(bs, 0, sizeof(*bs));
288 bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
289 bs->DataSize = current - dxva_data;
290 bs->NumMBsInBuffer = 0;
291
292 slice_data = ctx_pic->slice_short;
293 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
294
295 av_assert0((bs->DataSize & 127) == 0);
296 return ff_dxva2_commit_buffer(avctx, ctx, sc,
297 DXVA2_SliceControlBufferType,
298 slice_data, slice_size, 0);
299 }
300
301
302 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
303 av_unused const uint8_t *buffer,
304 av_unused uint32_t size)
305 {
306 const HEVCContext *h = avctx->priv_data;
307 struct dxva_context *ctx = avctx->hwaccel_context;
308 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
309
310 if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
311 return -1;
312 av_assert0(ctx_pic);
313
314 /* Fill up DXVA_PicParams_HEVC */
315 fill_picture_parameters(ctx, h, &ctx_pic->pp);
316
317 /* Fill up DXVA_Qmatrix_HEVC */
318 fill_scaling_lists(ctx, h, &ctx_pic->qm);
319
320 ctx_pic->slice_count = 0;
321 ctx_pic->bitstream_size = 0;
322 ctx_pic->bitstream = NULL;
323 return 0;
324 }
325
326 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
327 const uint8_t *buffer,
328 uint32_t size)
329 {
330 const HEVCContext *h = avctx->priv_data;
331 const HEVCFrame *current_picture = h->ref;
332 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
333 unsigned position;
334
335 if (ctx_pic->slice_count >= MAX_SLICES)
336 return -1;
337
338 if (!ctx_pic->bitstream)
339 ctx_pic->bitstream = buffer;
340 ctx_pic->bitstream_size += size;
341
342 position = buffer - ctx_pic->bitstream;
343 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
344 ctx_pic->slice_count++;
345
346 return 0;
347 }
348
349 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
350 {
351 HEVCContext *h = avctx->priv_data;
352 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
353 int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
354 int ret;
355
356 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
357 return -1;
358
359 ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
360 &ctx_pic->pp, sizeof(ctx_pic->pp),
361 scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
362 commit_bitstream_and_slice_buffer);
363 return ret;
364 }
365
366 AVHWAccel ff_hevc_dxva2_hwaccel = {
367 .name = "hevc_dxva2",
368 .type = AVMEDIA_TYPE_VIDEO,
369 .id = AV_CODEC_ID_HEVC,
370 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
371 .start_frame = dxva2_hevc_start_frame,
372 .decode_slice = dxva2_hevc_decode_slice,
373 .end_frame = dxva2_hevc_end_frame,
374 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
375 };