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1/*
2 * DXVA2 HEVC HW acceleration.
3 *
4 * copyright (c) 2014 - 2015 Hendrik Leppkes
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 "libavutil/avassert.h"
24
25#include "hevc_data.h"
26#include "hevcdec.h"
27
28// The headers above may include w32threads.h, which uses the original
29// _WIN32_WINNT define, while dxva2_internal.h redefines it to target a
30// potentially newer version.
31#include "dxva2_internal.h"
32
33#define MAX_SLICES 256
34
35struct hevc_dxva2_picture_context {
36 DXVA_PicParams_HEVC pp;
37 DXVA_Qmatrix_HEVC qm;
38 unsigned slice_count;
39 DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
40 const uint8_t *bitstream;
41 unsigned bitstream_size;
42};
43
44static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
45 unsigned index, unsigned flag)
46{
47 av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
48 pic->bPicEntry = index | (flag << 7);
49}
50
51static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
52{
53 int i;
54 for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
55 if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
56 return i;
57 }
58 return 0xff;
59}
60
61static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
62 DXVA_PicParams_HEVC *pp)
63{
64 const HEVCFrame *current_picture = h->ref;
65 const HEVCSPS *sps = h->ps.sps;
66 const HEVCPPS *pps = h->ps.pps;
67 int i, j;
68
69 memset(pp, 0, sizeof(*pp));
70
71 pp->PicWidthInMinCbsY = sps->min_cb_width;
72 pp->PicHeightInMinCbsY = sps->min_cb_height;
73
74 pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc << 0) |
75 (sps->separate_colour_plane_flag << 2) |
76 ((sps->bit_depth - 8) << 3) |
77 ((sps->bit_depth - 8) << 6) |
78 ((sps->log2_max_poc_lsb - 4) << 9) |
79 (0 << 13) |
80 (0 << 14) |
81 (0 << 15);
82
83 fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
84
85 pp->sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
86 pp->log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3;
87 pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
88 pp->log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2;
89 pp->log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size;
90 pp->max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter;
91 pp->max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra;
92 pp->num_short_term_ref_pic_sets = sps->nb_st_rps;
93 pp->num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps;
94
95 pp->num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1;
96 pp->num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1;
97 pp->init_qp_minus26 = pps->pic_init_qp_minus26;
98
99 if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
100 pp->ucNumDeltaPocsOfRefRpsIdx = h->sh.short_term_rps->rps_idx_num_delta_pocs;
101 pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
102 }
103
104 pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag << 0) |
105 (sps->amp_enabled_flag << 1) |
106 (sps->sao_enabled << 2) |
107 (sps->pcm_enabled_flag << 3) |
108 ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0) << 4) |
109 ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
110 ((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
111 ((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
112 (sps->pcm.loop_filter_disable_flag << 16) |
113 (sps->long_term_ref_pics_present_flag << 17) |
114 (sps->sps_temporal_mvp_enabled_flag << 18) |
115 (sps->sps_strong_intra_smoothing_enable_flag << 19) |
116 (pps->dependent_slice_segments_enabled_flag << 20) |
117 (pps->output_flag_present_flag << 21) |
118 (pps->num_extra_slice_header_bits << 22) |
119 (pps->sign_data_hiding_flag << 25) |
120 (pps->cabac_init_present_flag << 26) |
121 (0 << 27);
122
123 pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag << 0) |
124 (pps->transform_skip_enabled_flag << 1) |
125 (pps->cu_qp_delta_enabled_flag << 2) |
126 (pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
127 (pps->weighted_pred_flag << 4) |
128 (pps->weighted_bipred_flag << 5) |
129 (pps->transquant_bypass_enable_flag << 6) |
130 (pps->tiles_enabled_flag << 7) |
131 (pps->entropy_coding_sync_enabled_flag << 8) |
132 (pps->uniform_spacing_flag << 9) |
133 ((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
134 (pps->seq_loop_filter_across_slices_enabled_flag << 11) |
135 (pps->deblocking_filter_override_enabled_flag << 12) |
136 (pps->disable_dbf << 13) |
137 (pps->lists_modification_present_flag << 14) |
138 (pps->slice_header_extension_present_flag << 15) |
139 (IS_IRAP(h) << 16) |
140 (IS_IDR(h) << 17) |
141 /* IntraPicFlag */
142 (IS_IRAP(h) << 18) |
143 (0 << 19);
144 pp->pps_cb_qp_offset = pps->cb_qp_offset;
145 pp->pps_cr_qp_offset = pps->cr_qp_offset;
146 if (pps->tiles_enabled_flag) {
147 pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
148 pp->num_tile_rows_minus1 = pps->num_tile_rows - 1;
149
150 if (!pps->uniform_spacing_flag) {
151 for (i = 0; i < pps->num_tile_columns; i++)
152 pp->column_width_minus1[i] = pps->column_width[i] - 1;
153
154 for (i = 0; i < pps->num_tile_rows; i++)
155 pp->row_height_minus1[i] = pps->row_height[i] - 1;
156 }
157 }
158
159 pp->diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth;
160 pp->pps_beta_offset_div2 = pps->beta_offset / 2;
161 pp->pps_tc_offset_div2 = pps->tc_offset / 2;
162 pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
163 pp->CurrPicOrderCntVal = h->poc;
164
165 // fill RefPicList from the DPB
166 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
167 const HEVCFrame *frame = NULL;
168 while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
169 if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
170 frame = &h->DPB[j];
171 j++;
172 }
173
174 if (frame) {
175 fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
176 pp->PicOrderCntValList[i] = frame->poc;
177 } else {
178 pp->RefPicList[i].bPicEntry = 0xff;
179 pp->PicOrderCntValList[i] = 0;
180 }
181 }
182
183 #define DO_REF_LIST(ref_idx, ref_list) { \
184 const RefPicList *rpl = &h->rps[ref_idx]; \
185 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
186 const HEVCFrame *frame = NULL; \
187 while (!frame && j < rpl->nb_refs) \
188 frame = rpl->ref[j++]; \
189 if (frame) \
190 pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
191 else \
192 pp->ref_list[i] = 0xff; \
193 } \
194 }
195
196 // Fill short term and long term lists
197 DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
198 DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
199 DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
200
201 pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
202}
203
204static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
205{
206 unsigned i, j, pos;
207 const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
208 &h->ps.pps->scaling_list : &h->ps.sps->scaling_list;
209
210 memset(qm, 0, sizeof(*qm));
211 for (i = 0; i < 6; i++) {
212 for (j = 0; j < 16; j++) {
213 pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
214 qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
215 }
216
217 for (j = 0; j < 64; j++) {
218 pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
219 qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
220 qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
221
222 if (i < 2)
223 qm->ucScalingLists3[i][j] = sl->sl[3][i * 3][pos];
224 }
225
226 qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
227 if (i < 2)
228 qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
229 }
230}
231
232static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
233 unsigned position, unsigned size)
234{
235 memset(slice, 0, sizeof(*slice));
236 slice->BSNALunitDataLocation = position;
237 slice->SliceBytesInBuffer = size;
238 slice->wBadSliceChopping = 0;
239}
240
241static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
242 DECODER_BUFFER_DESC *bs,
243 DECODER_BUFFER_DESC *sc)
244{
245 const HEVCContext *h = avctx->priv_data;
246 AVDXVAContext *ctx = avctx->hwaccel_context;
247 const HEVCFrame *current_picture = h->ref;
248 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
249 DXVA_Slice_HEVC_Short *slice = NULL;
250 void *dxva_data_ptr;
251 uint8_t *dxva_data, *current, *end;
252 unsigned dxva_size;
253 void *slice_data;
254 unsigned slice_size;
255 unsigned padding;
256 unsigned i;
257 unsigned type;
258
259 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
260#if CONFIG_D3D11VA
261 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
262 type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
263 if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
264 D3D11VA_CONTEXT(ctx)->decoder,
265 type,
266 &dxva_size, &dxva_data_ptr)))
267 return -1;
268 }
269#endif
270#if CONFIG_DXVA2
271 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
272 type = DXVA2_BitStreamDateBufferType;
273 if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
274 type,
275 &dxva_data_ptr, &dxva_size)))
276 return -1;
277 }
278#endif
279
280 dxva_data = dxva_data_ptr;
281 current = dxva_data;
282 end = dxva_data + dxva_size;
283
284 for (i = 0; i < ctx_pic->slice_count; i++) {
285 static const uint8_t start_code[] = { 0, 0, 1 };
286 static const unsigned start_code_size = sizeof(start_code);
287 unsigned position, size;
288
289 slice = &ctx_pic->slice_short[i];
290
291 position = slice->BSNALunitDataLocation;
292 size = slice->SliceBytesInBuffer;
293 if (start_code_size + size > end - current) {
294 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
295 break;
296 }
297
298 slice->BSNALunitDataLocation = current - dxva_data;
299 slice->SliceBytesInBuffer = start_code_size + size;
300
301 memcpy(current, start_code, start_code_size);
302 current += start_code_size;
303
304 memcpy(current, &ctx_pic->bitstream[position], size);
305 current += size;
306 }
307 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
308 if (slice && padding > 0) {
309 memset(current, 0, padding);
310 current += padding;
311
312 slice->SliceBytesInBuffer += padding;
313 }
314#if CONFIG_D3D11VA
315 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD)
316 if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
317 return -1;
318#endif
319#if CONFIG_DXVA2
320 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
321 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
322 return -1;
323#endif
324 if (i < ctx_pic->slice_count)
325 return -1;
326
327#if CONFIG_D3D11VA
328 if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
329 D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
330 memset(dsc11, 0, sizeof(*dsc11));
331 dsc11->BufferType = type;
332 dsc11->DataSize = current - dxva_data;
333 dsc11->NumMBsInBuffer = 0;
334
335 type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
336 }
337#endif
338#if CONFIG_DXVA2
339 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
340 DXVA2_DecodeBufferDesc *dsc2 = bs;
341 memset(dsc2, 0, sizeof(*dsc2));
342 dsc2->CompressedBufferType = type;
343 dsc2->DataSize = current - dxva_data;
344 dsc2->NumMBsInBuffer = 0;
345
346 type = DXVA2_SliceControlBufferType;
347 }
348#endif
349
350 slice_data = ctx_pic->slice_short;
351 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
352
353 av_assert0(((current - dxva_data) & 127) == 0);
354 return ff_dxva2_commit_buffer(avctx, ctx, sc,
355 type,
356 slice_data, slice_size, 0);
357}
358
359
360static int dxva2_hevc_start_frame(AVCodecContext *avctx,
361 av_unused const uint8_t *buffer,
362 av_unused uint32_t size)
363{
364 const HEVCContext *h = avctx->priv_data;
365 AVDXVAContext *ctx = avctx->hwaccel_context;
366 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
367
368 if (!DXVA_CONTEXT_VALID(avctx, ctx))
369 return -1;
370 av_assert0(ctx_pic);
371
372 /* Fill up DXVA_PicParams_HEVC */
373 fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
374
375 /* Fill up DXVA_Qmatrix_HEVC */
376 fill_scaling_lists(ctx, h, &ctx_pic->qm);
377
378 ctx_pic->slice_count = 0;
379 ctx_pic->bitstream_size = 0;
380 ctx_pic->bitstream = NULL;
381 return 0;
382}
383
384static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
385 const uint8_t *buffer,
386 uint32_t size)
387{
388 const HEVCContext *h = avctx->priv_data;
389 const HEVCFrame *current_picture = h->ref;
390 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
391 unsigned position;
392
393 if (ctx_pic->slice_count >= MAX_SLICES)
394 return -1;
395
396 if (!ctx_pic->bitstream)
397 ctx_pic->bitstream = buffer;
398 ctx_pic->bitstream_size += size;
399
400 position = buffer - ctx_pic->bitstream;
401 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
402 ctx_pic->slice_count++;
403
404 return 0;
405}
406
407static int dxva2_hevc_end_frame(AVCodecContext *avctx)
408{
409 HEVCContext *h = avctx->priv_data;
410 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
411 int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
412 int ret;
413
414 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
415 return -1;
416
417 ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
418 &ctx_pic->pp, sizeof(ctx_pic->pp),
419 scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
420 commit_bitstream_and_slice_buffer);
421 return ret;
422}
423
424#if CONFIG_HEVC_DXVA2_HWACCEL
425AVHWAccel ff_hevc_dxva2_hwaccel = {
426 .name = "hevc_dxva2",
427 .type = AVMEDIA_TYPE_VIDEO,
428 .id = AV_CODEC_ID_HEVC,
429 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
430 .start_frame = dxva2_hevc_start_frame,
431 .decode_slice = dxva2_hevc_decode_slice,
432 .end_frame = dxva2_hevc_end_frame,
433 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
434};
435#endif
436
437#if CONFIG_HEVC_D3D11VA_HWACCEL
438AVHWAccel ff_hevc_d3d11va_hwaccel = {
439 .name = "hevc_d3d11va",
440 .type = AVMEDIA_TYPE_VIDEO,
441 .id = AV_CODEC_ID_HEVC,
442 .pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
443 .start_frame = dxva2_hevc_start_frame,
444 .decode_slice = dxva2_hevc_decode_slice,
445 .end_frame = dxva2_hevc_end_frame,
446 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
447};
448#endif
449
generated by cgit at 2024-05-17 08:31:54 (GMT)