2 * DXVA2 HEVC HW acceleration.
4 * copyright (c) 2014 - 2015 Hendrik Leppkes
6 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/avassert.h"
25 #include "dxva2_internal.h"
26 #include "hevc_data.h"
29 #define MAX_SLICES 256
31 struct hevc_dxva2_picture_context {
32 DXVA_PicParams_HEVC pp;
35 DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
36 const uint8_t *bitstream;
37 unsigned bitstream_size;
40 static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
41 unsigned index, unsigned flag)
43 av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
44 pic->bPicEntry = index | (flag << 7);
47 static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
50 for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
51 if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
57 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
58 DXVA_PicParams_HEVC *pp)
60 const HEVCFrame *current_picture = h->ref;
61 const HEVCSPS *sps = h->ps.sps;
62 const HEVCPPS *pps = h->ps.pps;
65 memset(pp, 0, sizeof(*pp));
67 pp->PicWidthInMinCbsY = sps->min_cb_width;
68 pp->PicHeightInMinCbsY = sps->min_cb_height;
70 pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc << 0) |
71 (sps->separate_colour_plane_flag << 2) |
72 ((sps->bit_depth - 8) << 3) |
73 ((sps->bit_depth - 8) << 6) |
74 ((sps->log2_max_poc_lsb - 4) << 9) |
79 fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
81 pp->sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
82 pp->log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3;
83 pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
84 pp->log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2;
85 pp->log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size;
86 pp->max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter;
87 pp->max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra;
88 pp->num_short_term_ref_pic_sets = sps->nb_st_rps;
89 pp->num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps;
91 pp->num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1;
92 pp->num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1;
93 pp->init_qp_minus26 = pps->pic_init_qp_minus26;
95 if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
96 pp->ucNumDeltaPocsOfRefRpsIdx = h->sh.short_term_rps->rps_idx_num_delta_pocs;
97 pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
100 pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag << 0) |
101 (sps->amp_enabled_flag << 1) |
102 (sps->sao_enabled << 2) |
103 (sps->pcm_enabled_flag << 3) |
104 ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0) << 4) |
105 ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
106 ((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
107 ((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
108 (sps->pcm.loop_filter_disable_flag << 16) |
109 (sps->long_term_ref_pics_present_flag << 17) |
110 (sps->sps_temporal_mvp_enabled_flag << 18) |
111 (sps->sps_strong_intra_smoothing_enable_flag << 19) |
112 (pps->dependent_slice_segments_enabled_flag << 20) |
113 (pps->output_flag_present_flag << 21) |
114 (pps->num_extra_slice_header_bits << 22) |
115 (pps->sign_data_hiding_flag << 25) |
116 (pps->cabac_init_present_flag << 26) |
119 pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag << 0) |
120 (pps->transform_skip_enabled_flag << 1) |
121 (pps->cu_qp_delta_enabled_flag << 2) |
122 (pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
123 (pps->weighted_pred_flag << 4) |
124 (pps->weighted_bipred_flag << 5) |
125 (pps->transquant_bypass_enable_flag << 6) |
126 (pps->tiles_enabled_flag << 7) |
127 (pps->entropy_coding_sync_enabled_flag << 8) |
128 (pps->uniform_spacing_flag << 9) |
129 ((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
130 (pps->seq_loop_filter_across_slices_enabled_flag << 11) |
131 (pps->deblocking_filter_override_enabled_flag << 12) |
132 (pps->disable_dbf << 13) |
133 (pps->lists_modification_present_flag << 14) |
134 (pps->slice_header_extension_present_flag << 15) |
140 pp->pps_cb_qp_offset = pps->cb_qp_offset;
141 pp->pps_cr_qp_offset = pps->cr_qp_offset;
142 if (pps->tiles_enabled_flag) {
143 pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
144 pp->num_tile_rows_minus1 = pps->num_tile_rows - 1;
146 if (!pps->uniform_spacing_flag) {
147 for (i = 0; i < pps->num_tile_columns; i++)
148 pp->column_width_minus1[i] = pps->column_width[i] - 1;
150 for (i = 0; i < pps->num_tile_rows; i++)
151 pp->row_height_minus1[i] = pps->row_height[i] - 1;
155 pp->diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth;
156 pp->pps_beta_offset_div2 = pps->beta_offset / 2;
157 pp->pps_tc_offset_div2 = pps->tc_offset / 2;
158 pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
159 pp->CurrPicOrderCntVal = h->poc;
161 // fill RefPicList from the DPB
162 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
163 const HEVCFrame *frame = NULL;
164 while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
165 if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
171 fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
172 pp->PicOrderCntValList[i] = frame->poc;
174 pp->RefPicList[i].bPicEntry = 0xff;
175 pp->PicOrderCntValList[i] = 0;
179 #define DO_REF_LIST(ref_idx, ref_list) { \
180 const RefPicList *rpl = &h->rps[ref_idx]; \
181 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
182 const HEVCFrame *frame = NULL; \
183 while (!frame && j < rpl->nb_refs) \
184 frame = rpl->ref[j++]; \
186 pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
188 pp->ref_list[i] = 0xff; \
192 // Fill short term and long term lists
193 DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
194 DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
195 DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
197 pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
200 static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
203 const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
204 &h->ps.pps->scaling_list : &h->ps.sps->scaling_list;
206 memset(qm, 0, sizeof(*qm));
207 for (i = 0; i < 6; i++) {
208 for (j = 0; j < 16; j++) {
209 pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
210 qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
213 for (j = 0; j < 64; j++) {
214 pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
215 qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
216 qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
219 qm->ucScalingLists3[i][j] = sl->sl[3][i * 3][pos];
222 qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
224 qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
228 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
229 unsigned position, unsigned size)
231 memset(slice, 0, sizeof(*slice));
232 slice->BSNALunitDataLocation = position;
233 slice->SliceBytesInBuffer = size;
234 slice->wBadSliceChopping = 0;
237 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
238 DECODER_BUFFER_DESC *bs,
239 DECODER_BUFFER_DESC *sc)
241 const HEVCContext *h = avctx->priv_data;
242 AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
243 const HEVCFrame *current_picture = h->ref;
244 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
245 DXVA_Slice_HEVC_Short *slice = NULL;
247 uint8_t *dxva_data, *current, *end;
255 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
257 if (ff_dxva2_is_d3d11(avctx)) {
258 type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
259 if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
260 D3D11VA_CONTEXT(ctx)->decoder,
262 &dxva_size, &dxva_data_ptr)))
267 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
268 type = DXVA2_BitStreamDateBufferType;
269 if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
271 &dxva_data_ptr, &dxva_size)))
276 dxva_data = dxva_data_ptr;
278 end = dxva_data + dxva_size;
280 for (i = 0; i < ctx_pic->slice_count; i++) {
281 static const uint8_t start_code[] = { 0, 0, 1 };
282 static const unsigned start_code_size = sizeof(start_code);
283 unsigned position, size;
285 slice = &ctx_pic->slice_short[i];
287 position = slice->BSNALunitDataLocation;
288 size = slice->SliceBytesInBuffer;
289 if (start_code_size + size > end - current) {
290 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
294 slice->BSNALunitDataLocation = current - dxva_data;
295 slice->SliceBytesInBuffer = start_code_size + size;
297 memcpy(current, start_code, start_code_size);
298 current += start_code_size;
300 memcpy(current, &ctx_pic->bitstream[position], size);
303 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
304 if (slice && padding > 0) {
305 memset(current, 0, padding);
308 slice->SliceBytesInBuffer += padding;
311 if (ff_dxva2_is_d3d11(avctx))
312 if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
316 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
317 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
320 if (i < ctx_pic->slice_count)
324 if (ff_dxva2_is_d3d11(avctx)) {
325 D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
326 memset(dsc11, 0, sizeof(*dsc11));
327 dsc11->BufferType = type;
328 dsc11->DataSize = current - dxva_data;
329 dsc11->NumMBsInBuffer = 0;
331 type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
335 if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
336 DXVA2_DecodeBufferDesc *dsc2 = bs;
337 memset(dsc2, 0, sizeof(*dsc2));
338 dsc2->CompressedBufferType = type;
339 dsc2->DataSize = current - dxva_data;
340 dsc2->NumMBsInBuffer = 0;
342 type = DXVA2_SliceControlBufferType;
346 slice_data = ctx_pic->slice_short;
347 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
349 av_assert0(((current - dxva_data) & 127) == 0);
350 return ff_dxva2_commit_buffer(avctx, ctx, sc,
352 slice_data, slice_size, 0);
356 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
357 av_unused const uint8_t *buffer,
358 av_unused uint32_t size)
360 const HEVCContext *h = avctx->priv_data;
361 AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
362 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
364 if (!DXVA_CONTEXT_VALID(avctx, ctx))
368 /* Fill up DXVA_PicParams_HEVC */
369 fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
371 /* Fill up DXVA_Qmatrix_HEVC */
372 fill_scaling_lists(ctx, h, &ctx_pic->qm);
374 ctx_pic->slice_count = 0;
375 ctx_pic->bitstream_size = 0;
376 ctx_pic->bitstream = NULL;
380 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
381 const uint8_t *buffer,
384 const HEVCContext *h = avctx->priv_data;
385 const HEVCFrame *current_picture = h->ref;
386 struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
389 if (ctx_pic->slice_count >= MAX_SLICES)
392 if (!ctx_pic->bitstream)
393 ctx_pic->bitstream = buffer;
394 ctx_pic->bitstream_size += size;
396 position = buffer - ctx_pic->bitstream;
397 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
398 ctx_pic->slice_count++;
403 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
405 HEVCContext *h = avctx->priv_data;
406 struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
407 int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
410 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
413 ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
414 &ctx_pic->pp, sizeof(ctx_pic->pp),
415 scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
416 commit_bitstream_and_slice_buffer);
420 #if CONFIG_HEVC_DXVA2_HWACCEL
421 const AVHWAccel ff_hevc_dxva2_hwaccel = {
422 .name = "hevc_dxva2",
423 .type = AVMEDIA_TYPE_VIDEO,
424 .id = AV_CODEC_ID_HEVC,
425 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
426 .init = ff_dxva2_decode_init,
427 .uninit = ff_dxva2_decode_uninit,
428 .start_frame = dxva2_hevc_start_frame,
429 .decode_slice = dxva2_hevc_decode_slice,
430 .end_frame = dxva2_hevc_end_frame,
431 .frame_params = ff_dxva2_common_frame_params,
432 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
433 .priv_data_size = sizeof(FFDXVASharedContext),
437 #if CONFIG_HEVC_D3D11VA_HWACCEL
438 const AVHWAccel 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 .init = ff_dxva2_decode_init,
444 .uninit = ff_dxva2_decode_uninit,
445 .start_frame = dxva2_hevc_start_frame,
446 .decode_slice = dxva2_hevc_decode_slice,
447 .end_frame = dxva2_hevc_end_frame,
448 .frame_params = ff_dxva2_common_frame_params,
449 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
450 .priv_data_size = sizeof(FFDXVASharedContext),
454 #if CONFIG_HEVC_D3D11VA2_HWACCEL
455 const AVHWAccel ff_hevc_d3d11va2_hwaccel = {
456 .name = "hevc_d3d11va2",
457 .type = AVMEDIA_TYPE_VIDEO,
458 .id = AV_CODEC_ID_HEVC,
459 .pix_fmt = AV_PIX_FMT_D3D11,
460 .init = ff_dxva2_decode_init,
461 .uninit = ff_dxva2_decode_uninit,
462 .start_frame = dxva2_hevc_start_frame,
463 .decode_slice = dxva2_hevc_decode_slice,
464 .end_frame = dxva2_hevc_end_frame,
465 .frame_params = ff_dxva2_common_frame_params,
466 .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
467 .priv_data_size = sizeof(FFDXVASharedContext),