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path: root/libavcodec/vaapi_hevc.c (plain)
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1/*
2 * HEVC HW decode acceleration through VA API
3 *
4 * Copyright (C) 2015 Timo Rothenpieler <timo@rothenpieler.org>
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 <va/va.h>
24#include <va/va_dec_hevc.h>
25
26#include "avcodec.h"
27#include "hevcdec.h"
28#include "hwaccel.h"
29#include "vaapi_decode.h"
30
31typedef struct VAAPIDecodePictureHEVC {
32 VAPictureParameterBufferHEVC pic_param;
33 VASliceParameterBufferHEVC last_slice_param;
34 const uint8_t *last_buffer;
35 size_t last_size;
36
37 VAAPIDecodePicture pic;
38} VAAPIDecodePictureHEVC;
39
40static void init_vaapi_pic(VAPictureHEVC *va_pic)
41{
42 va_pic->picture_id = VA_INVALID_ID;
43 va_pic->flags = VA_PICTURE_HEVC_INVALID;
44 va_pic->pic_order_cnt = 0;
45}
46
47static void fill_vaapi_pic(VAPictureHEVC *va_pic, const HEVCFrame *pic, int rps_type)
48{
49 va_pic->picture_id = ff_vaapi_get_surface_id(pic->frame);
50 va_pic->pic_order_cnt = pic->poc;
51 va_pic->flags = rps_type;
52
53 if (pic->flags & HEVC_FRAME_FLAG_LONG_REF)
54 va_pic->flags |= VA_PICTURE_HEVC_LONG_TERM_REFERENCE;
55
56 if (pic->frame->interlaced_frame) {
57 va_pic->flags |= VA_PICTURE_HEVC_FIELD_PIC;
58
59 if (!pic->frame->top_field_first)
60 va_pic->flags |= VA_PICTURE_HEVC_BOTTOM_FIELD;
61 }
62}
63
64static int find_frame_rps_type(const HEVCContext *h, const HEVCFrame *pic)
65{
66 VASurfaceID pic_surf = ff_vaapi_get_surface_id(pic->frame);
67 int i;
68
69 for (i = 0; i < h->rps[ST_CURR_BEF].nb_refs; i++) {
70 if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_BEF].ref[i]->frame))
71 return VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE;
72 }
73
74 for (i = 0; i < h->rps[ST_CURR_AFT].nb_refs; i++) {
75 if (pic_surf == ff_vaapi_get_surface_id(h->rps[ST_CURR_AFT].ref[i]->frame))
76 return VA_PICTURE_HEVC_RPS_ST_CURR_AFTER;
77 }
78
79 for (i = 0; i < h->rps[LT_CURR].nb_refs; i++) {
80 if (pic_surf == ff_vaapi_get_surface_id(h->rps[LT_CURR].ref[i]->frame))
81 return VA_PICTURE_HEVC_RPS_LT_CURR;
82 }
83
84 return 0;
85}
86
87static void fill_vaapi_reference_frames(const HEVCContext *h, VAPictureParameterBufferHEVC *pp)
88{
89 const HEVCFrame *current_picture = h->ref;
90 int i, j, rps_type;
91
92 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
93 const HEVCFrame *frame = NULL;
94
95 while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
96 if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
97 frame = &h->DPB[j];
98 j++;
99 }
100
101 init_vaapi_pic(&pp->ReferenceFrames[i]);
102
103 if (frame) {
104 rps_type = find_frame_rps_type(h, frame);
105 fill_vaapi_pic(&pp->ReferenceFrames[i], frame, rps_type);
106 }
107 }
108}
109
110static int vaapi_hevc_start_frame(AVCodecContext *avctx,
111 av_unused const uint8_t *buffer,
112 av_unused uint32_t size)
113{
114 const HEVCContext *h = avctx->priv_data;
115 VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
116 const HEVCSPS *sps = h->ps.sps;
117 const HEVCPPS *pps = h->ps.pps;
118
119 const ScalingList *scaling_list = NULL;
120 int err, i;
121
122 pic->pic.output_surface = ff_vaapi_get_surface_id(h->ref->frame);
123
124 pic->pic_param = (VAPictureParameterBufferHEVC) {
125 .pic_fields.value = 0,
126 .slice_parsing_fields.value = 0,
127 .pic_width_in_luma_samples = sps->width,
128 .pic_height_in_luma_samples = sps->height,
129 .log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3,
130 .sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1,
131 .log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size,
132 .log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2,
133 .log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size,
134 .max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter,
135 .max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra,
136 .num_short_term_ref_pic_sets = sps->nb_st_rps,
137 .num_long_term_ref_pic_sps = sps->num_long_term_ref_pics_sps,
138 .num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1,
139 .num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1,
140 .init_qp_minus26 = pps->pic_init_qp_minus26,
141 .pps_cb_qp_offset = pps->cb_qp_offset,
142 .pps_cr_qp_offset = pps->cr_qp_offset,
143 .pcm_sample_bit_depth_luma_minus1 = sps->pcm.bit_depth - 1,
144 .pcm_sample_bit_depth_chroma_minus1 = sps->pcm.bit_depth_chroma - 1,
145 .log2_min_pcm_luma_coding_block_size_minus3 = sps->pcm.log2_min_pcm_cb_size - 3,
146 .log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
147 .diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth,
148 .pps_beta_offset_div2 = pps->beta_offset / 2,
149 .pps_tc_offset_div2 = pps->tc_offset / 2,
150 .log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2,
151 .bit_depth_luma_minus8 = sps->bit_depth - 8,
152 .bit_depth_chroma_minus8 = sps->bit_depth - 8,
153 .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
154 .num_extra_slice_header_bits = pps->num_extra_slice_header_bits,
155 .pic_fields.bits = {
156 .chroma_format_idc = sps->chroma_format_idc,
157 .tiles_enabled_flag = pps->tiles_enabled_flag,
158 .separate_colour_plane_flag = sps->separate_colour_plane_flag,
159 .pcm_enabled_flag = sps->pcm_enabled_flag,
160 .scaling_list_enabled_flag = sps->scaling_list_enable_flag,
161 .transform_skip_enabled_flag = pps->transform_skip_enabled_flag,
162 .amp_enabled_flag = sps->amp_enabled_flag,
163 .strong_intra_smoothing_enabled_flag = sps->sps_strong_intra_smoothing_enable_flag,
164 .sign_data_hiding_enabled_flag = pps->sign_data_hiding_flag,
165 .constrained_intra_pred_flag = pps->constrained_intra_pred_flag,
166 .cu_qp_delta_enabled_flag = pps->cu_qp_delta_enabled_flag,
167 .weighted_pred_flag = pps->weighted_pred_flag,
168 .weighted_bipred_flag = pps->weighted_bipred_flag,
169 .transquant_bypass_enabled_flag = pps->transquant_bypass_enable_flag,
170 .entropy_coding_sync_enabled_flag = pps->entropy_coding_sync_enabled_flag,
171 .pps_loop_filter_across_slices_enabled_flag = pps->seq_loop_filter_across_slices_enabled_flag,
172 .loop_filter_across_tiles_enabled_flag = pps->loop_filter_across_tiles_enabled_flag,
173 .pcm_loop_filter_disabled_flag = sps->pcm.loop_filter_disable_flag,
174 },
175 .slice_parsing_fields.bits = {
176 .lists_modification_present_flag = pps->lists_modification_present_flag,
177 .long_term_ref_pics_present_flag = sps->long_term_ref_pics_present_flag,
178 .sps_temporal_mvp_enabled_flag = sps->sps_temporal_mvp_enabled_flag,
179 .cabac_init_present_flag = pps->cabac_init_present_flag,
180 .output_flag_present_flag = pps->output_flag_present_flag,
181 .dependent_slice_segments_enabled_flag = pps->dependent_slice_segments_enabled_flag,
182 .pps_slice_chroma_qp_offsets_present_flag = pps->pic_slice_level_chroma_qp_offsets_present_flag,
183 .sample_adaptive_offset_enabled_flag = sps->sao_enabled,
184 .deblocking_filter_override_enabled_flag = pps->deblocking_filter_override_enabled_flag,
185 .pps_disable_deblocking_filter_flag = pps->disable_dbf,
186 .slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag,
187 .RapPicFlag = IS_IRAP(h),
188 .IdrPicFlag = IS_IDR(h),
189 .IntraPicFlag = IS_IRAP(h),
190 },
191 };
192
193 fill_vaapi_pic(&pic->pic_param.CurrPic, h->ref, 0);
194 fill_vaapi_reference_frames(h, &pic->pic_param);
195
196 if (pps->tiles_enabled_flag) {
197 pic->pic_param.num_tile_columns_minus1 = pps->num_tile_columns - 1;
198 pic->pic_param.num_tile_rows_minus1 = pps->num_tile_rows - 1;
199
200 for (i = 0; i < pps->num_tile_columns; i++)
201 pic->pic_param.column_width_minus1[i] = pps->column_width[i] - 1;
202
203 for (i = 0; i < pps->num_tile_rows; i++)
204 pic->pic_param.row_height_minus1[i] = pps->row_height[i] - 1;
205 }
206
207 if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
208 pic->pic_param.st_rps_bits = h->sh.short_term_ref_pic_set_size;
209 } else {
210 pic->pic_param.st_rps_bits = 0;
211 }
212
213 err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
214 VAPictureParameterBufferType,
215 &pic->pic_param, sizeof(pic->pic_param));
216 if (err < 0)
217 goto fail;
218
219 if (pps->scaling_list_data_present_flag)
220 scaling_list = &pps->scaling_list;
221 else if (sps->scaling_list_enable_flag)
222 scaling_list = &sps->scaling_list;
223
224 if (scaling_list) {
225 VAIQMatrixBufferHEVC iq_matrix;
226 int j;
227
228 for (i = 0; i < 6; i++) {
229 for (j = 0; j < 16; j++)
230 iq_matrix.ScalingList4x4[i][j] = scaling_list->sl[0][i][j];
231 for (j = 0; j < 64; j++) {
232 iq_matrix.ScalingList8x8[i][j] = scaling_list->sl[1][i][j];
233 iq_matrix.ScalingList16x16[i][j] = scaling_list->sl[2][i][j];
234 if (i < 2)
235 iq_matrix.ScalingList32x32[i][j] = scaling_list->sl[3][i * 3][j];
236 }
237 iq_matrix.ScalingListDC16x16[i] = scaling_list->sl_dc[0][i];
238 if (i < 2)
239 iq_matrix.ScalingListDC32x32[i] = scaling_list->sl_dc[1][i * 3];
240 }
241
242 err = ff_vaapi_decode_make_param_buffer(avctx, &pic->pic,
243 VAIQMatrixBufferType,
244 &iq_matrix, sizeof(iq_matrix));
245 if (err < 0)
246 goto fail;
247 }
248
249 return 0;
250
251fail:
252 ff_vaapi_decode_cancel(avctx, &pic->pic);
253 return err;
254}
255
256static int vaapi_hevc_end_frame(AVCodecContext *avctx)
257{
258 const HEVCContext *h = avctx->priv_data;
259 VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
260 int ret;
261
262 if (pic->last_size) {
263 pic->last_slice_param.LongSliceFlags.fields.LastSliceOfPic = 1;
264 ret = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
265 &pic->last_slice_param, sizeof(pic->last_slice_param),
266 pic->last_buffer, pic->last_size);
267 if (ret < 0)
268 goto fail;
269 }
270
271
272 ret = ff_vaapi_decode_issue(avctx, &pic->pic);
273 if (ret < 0)
274 goto fail;
275
276 return 0;
277fail:
278 ff_vaapi_decode_cancel(avctx, &pic->pic);
279 return ret;
280}
281
282static void fill_pred_weight_table(const HEVCContext *h,
283 const SliceHeader *sh,
284 VASliceParameterBufferHEVC *slice_param)
285{
286 int i;
287
288 memset(slice_param->delta_luma_weight_l0, 0, sizeof(slice_param->delta_luma_weight_l0));
289 memset(slice_param->delta_luma_weight_l1, 0, sizeof(slice_param->delta_luma_weight_l1));
290 memset(slice_param->luma_offset_l0, 0, sizeof(slice_param->luma_offset_l0));
291 memset(slice_param->luma_offset_l1, 0, sizeof(slice_param->luma_offset_l1));
292 memset(slice_param->delta_chroma_weight_l0, 0, sizeof(slice_param->delta_chroma_weight_l0));
293 memset(slice_param->delta_chroma_weight_l1, 0, sizeof(slice_param->delta_chroma_weight_l1));
294 memset(slice_param->ChromaOffsetL0, 0, sizeof(slice_param->ChromaOffsetL0));
295 memset(slice_param->ChromaOffsetL1, 0, sizeof(slice_param->ChromaOffsetL1));
296
297 slice_param->delta_chroma_log2_weight_denom = 0;
298 slice_param->luma_log2_weight_denom = 0;
299
300 if (sh->slice_type == HEVC_SLICE_I ||
301 (sh->slice_type == HEVC_SLICE_P && !h->ps.pps->weighted_pred_flag) ||
302 (sh->slice_type == HEVC_SLICE_B && !h->ps.pps->weighted_bipred_flag))
303 return;
304
305 slice_param->luma_log2_weight_denom = sh->luma_log2_weight_denom;
306
307 if (h->ps.sps->chroma_format_idc) {
308 slice_param->delta_chroma_log2_weight_denom = sh->chroma_log2_weight_denom - sh->luma_log2_weight_denom;
309 }
310
311 for (i = 0; i < 15 && i < sh->nb_refs[L0]; i++) {
312 slice_param->delta_luma_weight_l0[i] = sh->luma_weight_l0[i] - (1 << sh->luma_log2_weight_denom);
313 slice_param->luma_offset_l0[i] = sh->luma_offset_l0[i];
314 slice_param->delta_chroma_weight_l0[i][0] = sh->chroma_weight_l0[i][0] - (1 << sh->chroma_log2_weight_denom);
315 slice_param->delta_chroma_weight_l0[i][1] = sh->chroma_weight_l0[i][1] - (1 << sh->chroma_log2_weight_denom);
316 slice_param->ChromaOffsetL0[i][0] = sh->chroma_offset_l0[i][0];
317 slice_param->ChromaOffsetL0[i][1] = sh->chroma_offset_l0[i][1];
318 }
319
320 if (sh->slice_type == HEVC_SLICE_B) {
321 for (i = 0; i < 15 && i < sh->nb_refs[L1]; i++) {
322 slice_param->delta_luma_weight_l1[i] = sh->luma_weight_l1[i] - (1 << sh->luma_log2_weight_denom);
323 slice_param->luma_offset_l1[i] = sh->luma_offset_l1[i];
324 slice_param->delta_chroma_weight_l1[i][0] = sh->chroma_weight_l1[i][0] - (1 << sh->chroma_log2_weight_denom);
325 slice_param->delta_chroma_weight_l1[i][1] = sh->chroma_weight_l1[i][1] - (1 << sh->chroma_log2_weight_denom);
326 slice_param->ChromaOffsetL1[i][0] = sh->chroma_offset_l1[i][0];
327 slice_param->ChromaOffsetL1[i][1] = sh->chroma_offset_l1[i][1];
328 }
329 }
330}
331
332static uint8_t get_ref_pic_index(const HEVCContext *h, const HEVCFrame *frame)
333{
334 VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
335 VAPictureParameterBufferHEVC *pp = &pic->pic_param;
336 uint8_t i;
337
338 if (!frame)
339 return 0xff;
340
341 for (i = 0; i < FF_ARRAY_ELEMS(pp->ReferenceFrames); i++) {
342 VASurfaceID pid = pp->ReferenceFrames[i].picture_id;
343 int poc = pp->ReferenceFrames[i].pic_order_cnt;
344 if (pid != VA_INVALID_ID && pid == ff_vaapi_get_surface_id(frame->frame) && poc == frame->poc)
345 return i;
346 }
347
348 return 0xff;
349}
350
351static int vaapi_hevc_decode_slice(AVCodecContext *avctx,
352 const uint8_t *buffer,
353 uint32_t size)
354{
355 const HEVCContext *h = avctx->priv_data;
356 const SliceHeader *sh = &h->sh;
357 VAAPIDecodePictureHEVC *pic = h->ref->hwaccel_picture_private;
358
359 int nb_list = (sh->slice_type == HEVC_SLICE_B) ?
360 2 : (sh->slice_type == HEVC_SLICE_I ? 0 : 1);
361
362 int err, i, list_idx;
363
364 if (!sh->first_slice_in_pic_flag) {
365 err = ff_vaapi_decode_make_slice_buffer(avctx, &pic->pic,
366 &pic->last_slice_param, sizeof(pic->last_slice_param),
367 pic->last_buffer, pic->last_size);
368 pic->last_buffer = NULL;
369 pic->last_size = 0;
370 if (err) {
371 ff_vaapi_decode_cancel(avctx, &pic->pic);
372 return err;
373 }
374 }
375
376 pic->last_slice_param = (VASliceParameterBufferHEVC) {
377 .slice_data_size = size,
378 .slice_data_offset = 0,
379 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
380 /* Add 1 to the bits count here to account for the byte_alignment bit, which
381 * always is at least one bit and not accounted for otherwise. */
382 .slice_data_byte_offset = (get_bits_count(&h->HEVClc->gb) + 1 + 7) / 8,
383 .slice_segment_address = sh->slice_segment_addr,
384 .slice_qp_delta = sh->slice_qp_delta,
385 .slice_cb_qp_offset = sh->slice_cb_qp_offset,
386 .slice_cr_qp_offset = sh->slice_cr_qp_offset,
387 .slice_beta_offset_div2 = sh->beta_offset / 2,
388 .slice_tc_offset_div2 = sh->tc_offset / 2,
389 .collocated_ref_idx = sh->slice_temporal_mvp_enabled_flag ? sh->collocated_ref_idx : 0xFF,
390 .five_minus_max_num_merge_cand = sh->slice_type == HEVC_SLICE_I ? 0 : 5 - sh->max_num_merge_cand,
391 .num_ref_idx_l0_active_minus1 = sh->nb_refs[L0] ? sh->nb_refs[L0] - 1 : 0,
392 .num_ref_idx_l1_active_minus1 = sh->nb_refs[L1] ? sh->nb_refs[L1] - 1 : 0,
393
394 .LongSliceFlags.fields = {
395 .dependent_slice_segment_flag = sh->dependent_slice_segment_flag,
396 .slice_type = sh->slice_type,
397 .color_plane_id = sh->colour_plane_id,
398 .mvd_l1_zero_flag = sh->mvd_l1_zero_flag,
399 .cabac_init_flag = sh->cabac_init_flag,
400 .slice_temporal_mvp_enabled_flag = sh->slice_temporal_mvp_enabled_flag,
401 .slice_deblocking_filter_disabled_flag = sh->disable_deblocking_filter_flag,
402 .collocated_from_l0_flag = sh->collocated_list == L0 ? 1 : 0,
403 .slice_loop_filter_across_slices_enabled_flag = sh->slice_loop_filter_across_slices_enabled_flag,
404 .slice_sao_luma_flag = sh->slice_sample_adaptive_offset_flag[0],
405 .slice_sao_chroma_flag = sh->slice_sample_adaptive_offset_flag[1],
406 },
407 };
408
409 memset(pic->last_slice_param.RefPicList, 0xFF, sizeof(pic->last_slice_param.RefPicList));
410
411 for (list_idx = 0; list_idx < nb_list; list_idx++) {
412 RefPicList *rpl = &h->ref->refPicList[list_idx];
413
414 for (i = 0; i < rpl->nb_refs; i++)
415 pic->last_slice_param.RefPicList[list_idx][i] = get_ref_pic_index(h, rpl->ref[i]);
416 }
417
418 fill_pred_weight_table(h, sh, &pic->last_slice_param);
419
420 pic->last_buffer = buffer;
421 pic->last_size = size;
422
423 return 0;
424}
425
426AVHWAccel ff_hevc_vaapi_hwaccel = {
427 .name = "hevc_vaapi",
428 .type = AVMEDIA_TYPE_VIDEO,
429 .id = AV_CODEC_ID_HEVC,
430 .pix_fmt = AV_PIX_FMT_VAAPI,
431 .start_frame = vaapi_hevc_start_frame,
432 .end_frame = vaapi_hevc_end_frame,
433 .decode_slice = vaapi_hevc_decode_slice,
434 .frame_priv_data_size = sizeof(VAAPIDecodePictureHEVC),
435 .init = ff_vaapi_decode_init,
436 .uninit = ff_vaapi_decode_uninit,
437 .priv_data_size = sizeof(VAAPIDecodeContext),
438 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
439};
440