dxva2: Directly use AVFrames
[libav.git] / libavcodec / dxva2_h264.c
1 /*
2 * DXVA2 H264 HW acceleration.
3 *
4 * copyright (c) 2009 Laurent Aimar
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 "dxva2_internal.h"
24 #include "h264.h"
25 #include "h264data.h"
26 #include "mpegutils.h"
27
28 struct dxva2_picture_context {
29 DXVA_PicParams_H264 pp;
30 DXVA_Qmatrix_H264 qm;
31 unsigned slice_count;
32 DXVA_Slice_H264_Short slice_short[MAX_SLICES];
33 DXVA_Slice_H264_Long slice_long[MAX_SLICES];
34 const uint8_t *bitstream;
35 unsigned bitstream_size;
36 };
37
38 static void fill_picture_entry(DXVA_PicEntry_H264 *pic,
39 unsigned index, unsigned flag)
40 {
41 assert((index&0x7f) == index && (flag&0x01) == flag);
42 pic->bPicEntry = index | (flag << 7);
43 }
44
45 static void fill_picture_parameters(struct dxva_context *ctx, const H264Context *h,
46 DXVA_PicParams_H264 *pp)
47 {
48 const H264Picture *current_picture = h->cur_pic_ptr;
49 int i, j;
50
51 memset(pp, 0, sizeof(*pp));
52 /* Configure current picture */
53 fill_picture_entry(&pp->CurrPic,
54 ff_dxva2_get_surface_index(ctx, &current_picture->f),
55 h->picture_structure == PICT_BOTTOM_FIELD);
56 /* Configure the set of references */
57 pp->UsedForReferenceFlags = 0;
58 pp->NonExistingFrameFlags = 0;
59 for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
60 const H264Picture *r;
61 if (j < h->short_ref_count) {
62 r = h->short_ref[j++];
63 } else {
64 r = NULL;
65 while (!r && j < h->short_ref_count + 16)
66 r = h->long_ref[j++ - h->short_ref_count];
67 }
68 if (r) {
69 fill_picture_entry(&pp->RefFrameList[i],
70 ff_dxva2_get_surface_index(ctx, &r->f),
71 r->long_ref != 0);
72
73 if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
74 pp->FieldOrderCntList[i][0] = r->field_poc[0];
75 if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
76 pp->FieldOrderCntList[i][1] = r->field_poc[1];
77
78 pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
79 if (r->reference & PICT_TOP_FIELD)
80 pp->UsedForReferenceFlags |= 1 << (2*i + 0);
81 if (r->reference & PICT_BOTTOM_FIELD)
82 pp->UsedForReferenceFlags |= 1 << (2*i + 1);
83 } else {
84 pp->RefFrameList[i].bPicEntry = 0xff;
85 pp->FieldOrderCntList[i][0] = 0;
86 pp->FieldOrderCntList[i][1] = 0;
87 pp->FrameNumList[i] = 0;
88 }
89 }
90
91 pp->wFrameWidthInMbsMinus1 = h->mb_width - 1;
92 pp->wFrameHeightInMbsMinus1 = h->mb_height - 1;
93 pp->num_ref_frames = h->sps.ref_frame_count;
94
95 pp->wBitFields = ((h->picture_structure != PICT_FRAME) << 0) |
96 ((h->sps.mb_aff &&
97 (h->picture_structure == PICT_FRAME)) << 1) |
98 (h->sps.residual_color_transform_flag << 2) |
99 /* sp_for_switch_flag (not implemented by Libav) */
100 (0 << 3) |
101 (h->sps.chroma_format_idc << 4) |
102 ((h->nal_ref_idc != 0) << 6) |
103 (h->pps.constrained_intra_pred << 7) |
104 (h->pps.weighted_pred << 8) |
105 (h->pps.weighted_bipred_idc << 9) |
106 /* MbsConsecutiveFlag */
107 (1 << 11) |
108 (h->sps.frame_mbs_only_flag << 12) |
109 (h->pps.transform_8x8_mode << 13) |
110 ((h->sps.level_idc >= 31) << 14) |
111 /* IntraPicFlag (Modified if we detect a non
112 * intra slice in dxva2_h264_decode_slice) */
113 (1 << 15);
114
115 pp->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8;
116 pp->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8;
117 if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
118 pp->Reserved16Bits = 0;
119 else
120 pp->Reserved16Bits = 3; /* FIXME is there a way to detect the right mode ? */
121 pp->StatusReportFeedbackNumber = 1 + ctx->report_id++;
122 pp->CurrFieldOrderCnt[0] = 0;
123 if ((h->picture_structure & PICT_TOP_FIELD) &&
124 current_picture->field_poc[0] != INT_MAX)
125 pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
126 pp->CurrFieldOrderCnt[1] = 0;
127 if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
128 current_picture->field_poc[1] != INT_MAX)
129 pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
130 pp->pic_init_qs_minus26 = h->pps.init_qs - 26;
131 pp->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0];
132 pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
133 pp->ContinuationFlag = 1;
134 pp->pic_init_qp_minus26 = h->pps.init_qp - 26;
135 pp->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1;
136 pp->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1;
137 pp->Reserved8BitsA = 0;
138 pp->frame_num = h->frame_num;
139 pp->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4;
140 pp->pic_order_cnt_type = h->sps.poc_type;
141 if (h->sps.poc_type == 0)
142 pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
143 else if (h->sps.poc_type == 1)
144 pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
145 pp->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag;
146 pp->entropy_coding_mode_flag = h->pps.cabac;
147 pp->pic_order_present_flag = h->pps.pic_order_present;
148 pp->num_slice_groups_minus1 = h->pps.slice_group_count - 1;
149 pp->slice_group_map_type = h->pps.mb_slice_group_map_type;
150 pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
151 pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present;
152 pp->Reserved8BitsB = 0;
153 pp->slice_group_change_rate_minus1= 0; /* XXX not implemented by Libav */
154 //pp->SliceGroupMap[810]; /* XXX not implemented by Libav */
155 }
156
157 static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
158 {
159 unsigned i, j;
160 memset(qm, 0, sizeof(*qm));
161 if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
162 for (i = 0; i < 6; i++)
163 for (j = 0; j < 16; j++)
164 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];
165
166 for (i = 0; i < 64; i++) {
167 qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
168 qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
169 }
170 } else {
171 for (i = 0; i < 6; i++)
172 for (j = 0; j < 16; j++)
173 qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];
174
175 for (i = 0; i < 64; i++) {
176 qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
177 qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
178 }
179 }
180 }
181
182 static int is_slice_short(struct dxva_context *ctx)
183 {
184 assert(ctx->cfg->ConfigBitstreamRaw == 1 ||
185 ctx->cfg->ConfigBitstreamRaw == 2);
186 return ctx->cfg->ConfigBitstreamRaw == 2;
187 }
188
189 static void fill_slice_short(DXVA_Slice_H264_Short *slice,
190 unsigned position, unsigned size)
191 {
192 memset(slice, 0, sizeof(*slice));
193 slice->BSNALunitDataLocation = position;
194 slice->SliceBytesInBuffer = size;
195 slice->wBadSliceChopping = 0;
196 }
197
198 static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
199 unsigned position, unsigned size)
200 {
201 const H264Context *h = avctx->priv_data;
202 struct dxva_context *ctx = avctx->hwaccel_context;
203 unsigned list;
204
205 memset(slice, 0, sizeof(*slice));
206 slice->BSNALunitDataLocation = position;
207 slice->SliceBytesInBuffer = size;
208 slice->wBadSliceChopping = 0;
209
210 slice->first_mb_in_slice = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x;
211 slice->NumMbsForSlice = 0; /* XXX it is set once we have all slices */
212 slice->BitOffsetToSliceData = get_bits_count(&h->gb);
213 slice->slice_type = ff_h264_get_slice_type(h);
214 if (h->slice_type_fixed)
215 slice->slice_type += 5;
216 slice->luma_log2_weight_denom = h->luma_log2_weight_denom;
217 slice->chroma_log2_weight_denom = h->chroma_log2_weight_denom;
218 if (h->list_count > 0)
219 slice->num_ref_idx_l0_active_minus1 = h->ref_count[0] - 1;
220 if (h->list_count > 1)
221 slice->num_ref_idx_l1_active_minus1 = h->ref_count[1] - 1;
222 slice->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26;
223 slice->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26;
224 slice->Reserved8Bits = 0;
225
226 for (list = 0; list < 2; list++) {
227 unsigned i;
228 for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
229 if (list < h->list_count && i < h->ref_count[list]) {
230 const H264Picture *r = &h->ref_list[list][i];
231 unsigned plane;
232 fill_picture_entry(&slice->RefPicList[list][i],
233 ff_dxva2_get_surface_index(ctx, &r->f),
234 r->reference == PICT_BOTTOM_FIELD);
235 for (plane = 0; plane < 3; plane++) {
236 int w, o;
237 if (plane == 0 && h->luma_weight_flag[list]) {
238 w = h->luma_weight[i][list][0];
239 o = h->luma_weight[i][list][1];
240 } else if (plane >= 1 && h->chroma_weight_flag[list]) {
241 w = h->chroma_weight[i][list][plane-1][0];
242 o = h->chroma_weight[i][list][plane-1][1];
243 } else {
244 w = 1 << (plane == 0 ? h->luma_log2_weight_denom :
245 h->chroma_log2_weight_denom);
246 o = 0;
247 }
248 slice->Weights[list][i][plane][0] = w;
249 slice->Weights[list][i][plane][1] = o;
250 }
251 } else {
252 unsigned plane;
253 slice->RefPicList[list][i].bPicEntry = 0xff;
254 for (plane = 0; plane < 3; plane++) {
255 slice->Weights[list][i][plane][0] = 0;
256 slice->Weights[list][i][plane][1] = 0;
257 }
258 }
259 }
260 }
261 slice->slice_qs_delta = 0; /* XXX not implemented by Libav */
262 slice->slice_qp_delta = h->qscale - h->pps.init_qp;
263 slice->redundant_pic_cnt = h->redundant_pic_count;
264 if (h->slice_type == AV_PICTURE_TYPE_B)
265 slice->direct_spatial_mv_pred_flag = h->direct_spatial_mv_pred;
266 slice->cabac_init_idc = h->pps.cabac ? h->cabac_init_idc : 0;
267 if (h->deblocking_filter < 2)
268 slice->disable_deblocking_filter_idc = 1 - h->deblocking_filter;
269 else
270 slice->disable_deblocking_filter_idc = h->deblocking_filter;
271 slice->slice_id = h->current_slice - 1;
272 }
273
274 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
275 DXVA2_DecodeBufferDesc *bs,
276 DXVA2_DecodeBufferDesc *sc)
277 {
278 const H264Context *h = avctx->priv_data;
279 const unsigned mb_count = h->mb_width * h->mb_height;
280 struct dxva_context *ctx = avctx->hwaccel_context;
281 const H264Picture *current_picture = h->cur_pic_ptr;
282 struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
283 DXVA_Slice_H264_Short *slice = NULL;
284 uint8_t *dxva_data, *current, *end;
285 unsigned dxva_size;
286 void *slice_data;
287 unsigned slice_size;
288 unsigned padding;
289 unsigned i;
290
291 /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
292 if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
293 DXVA2_BitStreamDateBufferType,
294 &dxva_data, &dxva_size)))
295 return -1;
296 current = dxva_data;
297 end = dxva_data + dxva_size;
298
299 for (i = 0; i < ctx_pic->slice_count; i++) {
300 static const uint8_t start_code[] = { 0, 0, 1 };
301 static const unsigned start_code_size = sizeof(start_code);
302 unsigned position, size;
303
304 assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
305 offsetof(DXVA_Slice_H264_Long, BSNALunitDataLocation));
306 assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
307 offsetof(DXVA_Slice_H264_Long, SliceBytesInBuffer));
308
309 if (is_slice_short(ctx))
310 slice = &ctx_pic->slice_short[i];
311 else
312 slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i];
313
314 position = slice->BSNALunitDataLocation;
315 size = slice->SliceBytesInBuffer;
316 if (start_code_size + size > end - current) {
317 av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
318 break;
319 }
320
321 slice->BSNALunitDataLocation = current - dxva_data;
322 slice->SliceBytesInBuffer = start_code_size + size;
323
324 if (!is_slice_short(ctx)) {
325 DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
326 if (i < ctx_pic->slice_count - 1)
327 slice_long->NumMbsForSlice =
328 slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
329 else
330 slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
331 }
332
333 memcpy(current, start_code, start_code_size);
334 current += start_code_size;
335
336 memcpy(current, &ctx_pic->bitstream[position], size);
337 current += size;
338 }
339 padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
340 if (slice && padding > 0) {
341 memset(current, 0, padding);
342 current += padding;
343
344 slice->SliceBytesInBuffer += padding;
345 }
346 if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
347 DXVA2_BitStreamDateBufferType)))
348 return -1;
349 if (i < ctx_pic->slice_count)
350 return -1;
351
352 memset(bs, 0, sizeof(*bs));
353 bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
354 bs->DataSize = current - dxva_data;
355 bs->NumMBsInBuffer = mb_count;
356
357 if (is_slice_short(ctx)) {
358 slice_data = ctx_pic->slice_short;
359 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
360 } else {
361 slice_data = ctx_pic->slice_long;
362 slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
363 }
364 assert((bs->DataSize & 127) == 0);
365 return ff_dxva2_commit_buffer(avctx, ctx, sc,
366 DXVA2_SliceControlBufferType,
367 slice_data, slice_size, mb_count);
368 }
369
370
371 static int dxva2_h264_start_frame(AVCodecContext *avctx,
372 av_unused const uint8_t *buffer,
373 av_unused uint32_t size)
374 {
375 const H264Context *h = avctx->priv_data;
376 struct dxva_context *ctx = avctx->hwaccel_context;
377 struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
378
379 if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
380 return -1;
381 assert(ctx_pic);
382
383 /* Fill up DXVA_PicParams_H264 */
384 fill_picture_parameters(ctx, h, &ctx_pic->pp);
385
386 /* Fill up DXVA_Qmatrix_H264 */
387 fill_scaling_lists(ctx, h, &ctx_pic->qm);
388
389 ctx_pic->slice_count = 0;
390 ctx_pic->bitstream_size = 0;
391 ctx_pic->bitstream = NULL;
392 return 0;
393 }
394
395 static int dxva2_h264_decode_slice(AVCodecContext *avctx,
396 const uint8_t *buffer,
397 uint32_t size)
398 {
399 const H264Context *h = avctx->priv_data;
400 struct dxva_context *ctx = avctx->hwaccel_context;
401 const H264Picture *current_picture = h->cur_pic_ptr;
402 struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
403 unsigned position;
404
405 if (ctx_pic->slice_count >= MAX_SLICES)
406 return -1;
407
408 if (!ctx_pic->bitstream)
409 ctx_pic->bitstream = buffer;
410 ctx_pic->bitstream_size += size;
411
412 position = buffer - ctx_pic->bitstream;
413 if (is_slice_short(ctx))
414 fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
415 position, size);
416 else
417 fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
418 position, size);
419 ctx_pic->slice_count++;
420
421 if (h->slice_type != AV_PICTURE_TYPE_I && h->slice_type != AV_PICTURE_TYPE_SI)
422 ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
423 return 0;
424 }
425
426 static int dxva2_h264_end_frame(AVCodecContext *avctx)
427 {
428 H264Context *h = avctx->priv_data;
429 struct dxva2_picture_context *ctx_pic =
430 h->cur_pic_ptr->hwaccel_picture_private;
431 int ret;
432
433 if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
434 return -1;
435 ret = ff_dxva2_common_end_frame(avctx, &h->cur_pic_ptr->f,
436 &ctx_pic->pp, sizeof(ctx_pic->pp),
437 &ctx_pic->qm, sizeof(ctx_pic->qm),
438 commit_bitstream_and_slice_buffer);
439 if (!ret)
440 ff_h264_draw_horiz_band(h, 0, h->avctx->height);
441 return ret;
442 }
443
444 AVHWAccel ff_h264_dxva2_hwaccel = {
445 .name = "h264_dxva2",
446 .type = AVMEDIA_TYPE_VIDEO,
447 .id = AV_CODEC_ID_H264,
448 .pix_fmt = AV_PIX_FMT_DXVA2_VLD,
449 .start_frame = dxva2_h264_start_frame,
450 .decode_slice = dxva2_h264_decode_slice,
451 .end_frame = dxva2_h264_end_frame,
452 .priv_data_size = sizeof(struct dxva2_picture_context),
453 };