Merge commit 'a1a143adb0fd11c474221431417cff25db7d920f'
[ffmpeg.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 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
35 struct 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
44 static 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
51 static 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
61 static 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
204 static 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
232 static 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
241 static 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 = DXVA_CONTEXT(avctx);
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 (ff_dxva2_is_d3d11(avctx)) {
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 (ff_dxva2_is_d3d11(avctx))
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 (ff_dxva2_is_d3d11(avctx)) {
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
360 static 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 = DXVA_CONTEXT(avctx);
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
384 static 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
407 static 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
425 AVHWAccel 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     .init           = ff_dxva2_decode_init,
431     .uninit         = ff_dxva2_decode_uninit,
432     .start_frame    = dxva2_hevc_start_frame,
433     .decode_slice   = dxva2_hevc_decode_slice,
434     .end_frame      = dxva2_hevc_end_frame,
435     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
436     .priv_data_size = sizeof(FFDXVASharedContext),
437 };
438 #endif
439
440 #if CONFIG_HEVC_D3D11VA_HWACCEL
441 AVHWAccel ff_hevc_d3d11va_hwaccel = {
442     .name           = "hevc_d3d11va",
443     .type           = AVMEDIA_TYPE_VIDEO,
444     .id             = AV_CODEC_ID_HEVC,
445     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
446     .init           = ff_dxva2_decode_init,
447     .uninit         = ff_dxva2_decode_uninit,
448     .start_frame    = dxva2_hevc_start_frame,
449     .decode_slice   = dxva2_hevc_decode_slice,
450     .end_frame      = dxva2_hevc_end_frame,
451     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
452     .priv_data_size = sizeof(FFDXVASharedContext),
453 };
454 #endif
455
456 #if CONFIG_HEVC_D3D11VA2_HWACCEL
457 AVHWAccel ff_hevc_d3d11va2_hwaccel = {
458     .name           = "hevc_d3d11va2",
459     .type           = AVMEDIA_TYPE_VIDEO,
460     .id             = AV_CODEC_ID_HEVC,
461     .pix_fmt        = AV_PIX_FMT_D3D11,
462     .init           = ff_dxva2_decode_init,
463     .uninit         = ff_dxva2_decode_uninit,
464     .start_frame    = dxva2_hevc_start_frame,
465     .decode_slice   = dxva2_hevc_decode_slice,
466     .end_frame      = dxva2_hevc_end_frame,
467     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
468     .priv_data_size = sizeof(FFDXVASharedContext),
469 };
470 #endif