Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * H.264 HW decode acceleration through VA API | |
3 | * | |
4 | * Copyright (C) 2008-2009 Splitted-Desktop Systems | |
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 "vaapi_internal.h" | |
24 | #include "h264.h" | |
25 | #include "mpegutils.h" | |
26 | ||
27 | /** | |
28 | * @file | |
29 | * This file implements the glue code between FFmpeg's and VA API's | |
30 | * structures for H.264 decoding. | |
31 | */ | |
32 | ||
33 | /** | |
34 | * Initialize an empty VA API picture. | |
35 | * | |
36 | * VA API requires a fixed-size reference picture array. | |
37 | */ | |
38 | static void init_vaapi_pic(VAPictureH264 *va_pic) | |
39 | { | |
40 | va_pic->picture_id = VA_INVALID_ID; | |
41 | va_pic->flags = VA_PICTURE_H264_INVALID; | |
42 | va_pic->TopFieldOrderCnt = 0; | |
43 | va_pic->BottomFieldOrderCnt = 0; | |
44 | } | |
45 | ||
46 | /** | |
47 | * Translate an FFmpeg Picture into its VA API form. | |
48 | * | |
49 | * @param[out] va_pic A pointer to VA API's own picture struct | |
50 | * @param[in] pic A pointer to the FFmpeg picture struct to convert | |
51 | * @param[in] pic_structure The picture field type (as defined in mpegvideo.h), | |
52 | * supersedes pic's field type if nonzero. | |
53 | */ | |
54 | static void fill_vaapi_pic(VAPictureH264 *va_pic, | |
55 | H264Picture *pic, | |
56 | int pic_structure) | |
57 | { | |
58 | if (pic_structure == 0) | |
59 | pic_structure = pic->reference; | |
60 | pic_structure &= PICT_FRAME; /* PICT_TOP_FIELD|PICT_BOTTOM_FIELD */ | |
61 | ||
62 | va_pic->picture_id = ff_vaapi_get_surface_id(&pic->f); | |
63 | va_pic->frame_idx = pic->long_ref ? pic->pic_id : pic->frame_num; | |
64 | ||
65 | va_pic->flags = 0; | |
66 | if (pic_structure != PICT_FRAME) | |
67 | va_pic->flags |= (pic_structure & PICT_TOP_FIELD) ? VA_PICTURE_H264_TOP_FIELD : VA_PICTURE_H264_BOTTOM_FIELD; | |
68 | if (pic->reference) | |
69 | va_pic->flags |= pic->long_ref ? VA_PICTURE_H264_LONG_TERM_REFERENCE : VA_PICTURE_H264_SHORT_TERM_REFERENCE; | |
70 | ||
71 | va_pic->TopFieldOrderCnt = 0; | |
72 | if (pic->field_poc[0] != INT_MAX) | |
73 | va_pic->TopFieldOrderCnt = pic->field_poc[0]; | |
74 | ||
75 | va_pic->BottomFieldOrderCnt = 0; | |
76 | if (pic->field_poc[1] != INT_MAX) | |
77 | va_pic->BottomFieldOrderCnt = pic->field_poc[1]; | |
78 | } | |
79 | ||
80 | /** Decoded Picture Buffer (DPB). */ | |
81 | typedef struct DPB { | |
82 | int size; ///< Current number of reference frames in the DPB | |
83 | int max_size; ///< Max number of reference frames. This is FF_ARRAY_ELEMS(VAPictureParameterBufferH264.ReferenceFrames) | |
84 | VAPictureH264 *va_pics; ///< Pointer to VAPictureParameterBufferH264.ReferenceFrames array | |
85 | } DPB; | |
86 | ||
87 | /** | |
88 | * Append picture to the decoded picture buffer, in a VA API form that | |
89 | * merges the second field picture attributes with the first, if | |
90 | * available. The decoded picture buffer's size must be large enough | |
91 | * to receive the new VA API picture object. | |
92 | */ | |
93 | static int dpb_add(DPB *dpb, H264Picture *pic) | |
94 | { | |
95 | int i; | |
96 | ||
97 | if (dpb->size >= dpb->max_size) | |
98 | return -1; | |
99 | ||
100 | for (i = 0; i < dpb->size; i++) { | |
101 | VAPictureH264 * const va_pic = &dpb->va_pics[i]; | |
102 | if (va_pic->picture_id == ff_vaapi_get_surface_id(&pic->f)) { | |
103 | VAPictureH264 temp_va_pic; | |
104 | fill_vaapi_pic(&temp_va_pic, pic, 0); | |
105 | ||
106 | if ((temp_va_pic.flags ^ va_pic->flags) & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD)) { | |
107 | va_pic->flags |= temp_va_pic.flags & (VA_PICTURE_H264_TOP_FIELD | VA_PICTURE_H264_BOTTOM_FIELD); | |
108 | /* Merge second field */ | |
109 | if (temp_va_pic.flags & VA_PICTURE_H264_TOP_FIELD) { | |
110 | va_pic->TopFieldOrderCnt = temp_va_pic.TopFieldOrderCnt; | |
111 | } else { | |
112 | va_pic->BottomFieldOrderCnt = temp_va_pic.BottomFieldOrderCnt; | |
113 | } | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | } | |
118 | ||
119 | fill_vaapi_pic(&dpb->va_pics[dpb->size++], pic, 0); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | /** Fill in VA API reference frames array. */ | |
124 | static int fill_vaapi_ReferenceFrames(VAPictureParameterBufferH264 *pic_param, | |
125 | H264Context *h) | |
126 | { | |
127 | DPB dpb; | |
128 | int i; | |
129 | ||
130 | dpb.size = 0; | |
131 | dpb.max_size = FF_ARRAY_ELEMS(pic_param->ReferenceFrames); | |
132 | dpb.va_pics = pic_param->ReferenceFrames; | |
133 | for (i = 0; i < dpb.max_size; i++) | |
134 | init_vaapi_pic(&dpb.va_pics[i]); | |
135 | ||
136 | for (i = 0; i < h->short_ref_count; i++) { | |
137 | H264Picture * const pic = h->short_ref[i]; | |
138 | if (pic && pic->reference && dpb_add(&dpb, pic) < 0) | |
139 | return -1; | |
140 | } | |
141 | ||
142 | for (i = 0; i < 16; i++) { | |
143 | H264Picture * const pic = h->long_ref[i]; | |
144 | if (pic && pic->reference && dpb_add(&dpb, pic) < 0) | |
145 | return -1; | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
150 | /** | |
151 | * Fill in VA API reference picture lists from the FFmpeg reference | |
152 | * picture list. | |
153 | * | |
154 | * @param[out] RefPicList VA API internal reference picture list | |
155 | * @param[in] ref_list A pointer to the FFmpeg reference list | |
156 | * @param[in] ref_count The number of reference pictures in ref_list | |
157 | */ | |
158 | static void fill_vaapi_RefPicList(VAPictureH264 RefPicList[32], | |
159 | H264Picture *ref_list, | |
160 | unsigned int ref_count) | |
161 | { | |
162 | unsigned int i, n = 0; | |
163 | for (i = 0; i < ref_count; i++) | |
164 | if (ref_list[i].reference) | |
165 | fill_vaapi_pic(&RefPicList[n++], &ref_list[i], 0); | |
166 | ||
167 | for (; n < 32; n++) | |
168 | init_vaapi_pic(&RefPicList[n]); | |
169 | } | |
170 | ||
171 | /** | |
172 | * Fill in prediction weight table. | |
173 | * | |
174 | * VA API requires a plain prediction weight table as it does not infer | |
175 | * any value. | |
176 | * | |
177 | * @param[in] h A pointer to the current H.264 context | |
178 | * @param[in] list The reference frame list index to use | |
179 | * @param[out] luma_weight_flag VA API plain luma weight flag | |
180 | * @param[out] luma_weight VA API plain luma weight table | |
181 | * @param[out] luma_offset VA API plain luma offset table | |
182 | * @param[out] chroma_weight_flag VA API plain chroma weight flag | |
183 | * @param[out] chroma_weight VA API plain chroma weight table | |
184 | * @param[out] chroma_offset VA API plain chroma offset table | |
185 | */ | |
186 | static void fill_vaapi_plain_pred_weight_table(H264Context *h, | |
187 | int list, | |
188 | unsigned char *luma_weight_flag, | |
189 | short luma_weight[32], | |
190 | short luma_offset[32], | |
191 | unsigned char *chroma_weight_flag, | |
192 | short chroma_weight[32][2], | |
193 | short chroma_offset[32][2]) | |
194 | { | |
195 | unsigned int i, j; | |
196 | ||
197 | *luma_weight_flag = h->luma_weight_flag[list]; | |
198 | *chroma_weight_flag = h->chroma_weight_flag[list]; | |
199 | ||
200 | for (i = 0; i < h->ref_count[list]; i++) { | |
201 | /* VA API also wants the inferred (default) values, not | |
202 | only what is available in the bitstream (7.4.3.2). */ | |
203 | if (h->luma_weight_flag[list]) { | |
204 | luma_weight[i] = h->luma_weight[i][list][0]; | |
205 | luma_offset[i] = h->luma_weight[i][list][1]; | |
206 | } else { | |
207 | luma_weight[i] = 1 << h->luma_log2_weight_denom; | |
208 | luma_offset[i] = 0; | |
209 | } | |
210 | for (j = 0; j < 2; j++) { | |
211 | if (h->chroma_weight_flag[list]) { | |
212 | chroma_weight[i][j] = h->chroma_weight[i][list][j][0]; | |
213 | chroma_offset[i][j] = h->chroma_weight[i][list][j][1]; | |
214 | } else { | |
215 | chroma_weight[i][j] = 1 << h->chroma_log2_weight_denom; | |
216 | chroma_offset[i][j] = 0; | |
217 | } | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
222 | /** Initialize and start decoding a frame with VA API. */ | |
223 | static int vaapi_h264_start_frame(AVCodecContext *avctx, | |
224 | av_unused const uint8_t *buffer, | |
225 | av_unused uint32_t size) | |
226 | { | |
227 | H264Context * const h = avctx->priv_data; | |
228 | struct vaapi_context * const vactx = avctx->hwaccel_context; | |
229 | VAPictureParameterBufferH264 *pic_param; | |
230 | VAIQMatrixBufferH264 *iq_matrix; | |
231 | ||
232 | av_dlog(avctx, "vaapi_h264_start_frame()\n"); | |
233 | ||
234 | vactx->slice_param_size = sizeof(VASliceParameterBufferH264); | |
235 | ||
236 | /* Fill in VAPictureParameterBufferH264. */ | |
237 | pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferH264)); | |
238 | if (!pic_param) | |
239 | return -1; | |
240 | fill_vaapi_pic(&pic_param->CurrPic, h->cur_pic_ptr, h->picture_structure); | |
241 | if (fill_vaapi_ReferenceFrames(pic_param, h) < 0) | |
242 | return -1; | |
243 | pic_param->picture_width_in_mbs_minus1 = h->mb_width - 1; | |
244 | pic_param->picture_height_in_mbs_minus1 = h->mb_height - 1; | |
245 | pic_param->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8; | |
246 | pic_param->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; | |
247 | pic_param->num_ref_frames = h->sps.ref_frame_count; | |
248 | pic_param->seq_fields.value = 0; /* reset all bits */ | |
249 | pic_param->seq_fields.bits.chroma_format_idc = h->sps.chroma_format_idc; | |
250 | pic_param->seq_fields.bits.residual_colour_transform_flag = h->sps.residual_color_transform_flag; /* XXX: only for 4:4:4 high profile? */ | |
251 | pic_param->seq_fields.bits.gaps_in_frame_num_value_allowed_flag = h->sps.gaps_in_frame_num_allowed_flag; | |
252 | pic_param->seq_fields.bits.frame_mbs_only_flag = h->sps.frame_mbs_only_flag; | |
253 | pic_param->seq_fields.bits.mb_adaptive_frame_field_flag = h->sps.mb_aff; | |
254 | pic_param->seq_fields.bits.direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; | |
255 | pic_param->seq_fields.bits.MinLumaBiPredSize8x8 = h->sps.level_idc >= 31; /* A.3.3.2 */ | |
256 | pic_param->seq_fields.bits.log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; | |
257 | pic_param->seq_fields.bits.pic_order_cnt_type = h->sps.poc_type; | |
258 | pic_param->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4; | |
259 | pic_param->seq_fields.bits.delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; | |
260 | pic_param->num_slice_groups_minus1 = h->pps.slice_group_count - 1; | |
261 | pic_param->slice_group_map_type = h->pps.mb_slice_group_map_type; | |
262 | pic_param->slice_group_change_rate_minus1 = 0; /* XXX: unimplemented in FFmpeg */ | |
263 | pic_param->pic_init_qp_minus26 = h->pps.init_qp - 26; | |
264 | pic_param->pic_init_qs_minus26 = h->pps.init_qs - 26; | |
265 | pic_param->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; | |
266 | pic_param->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; | |
267 | pic_param->pic_fields.value = 0; /* reset all bits */ | |
268 | pic_param->pic_fields.bits.entropy_coding_mode_flag = h->pps.cabac; | |
269 | pic_param->pic_fields.bits.weighted_pred_flag = h->pps.weighted_pred; | |
270 | pic_param->pic_fields.bits.weighted_bipred_idc = h->pps.weighted_bipred_idc; | |
271 | pic_param->pic_fields.bits.transform_8x8_mode_flag = h->pps.transform_8x8_mode; | |
272 | pic_param->pic_fields.bits.field_pic_flag = h->picture_structure != PICT_FRAME; | |
273 | pic_param->pic_fields.bits.constrained_intra_pred_flag = h->pps.constrained_intra_pred; | |
274 | pic_param->pic_fields.bits.pic_order_present_flag = h->pps.pic_order_present; | |
275 | pic_param->pic_fields.bits.deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; | |
276 | pic_param->pic_fields.bits.redundant_pic_cnt_present_flag = h->pps.redundant_pic_cnt_present; | |
277 | pic_param->pic_fields.bits.reference_pic_flag = h->nal_ref_idc != 0; | |
278 | pic_param->frame_num = h->frame_num; | |
279 | ||
280 | /* Fill in VAIQMatrixBufferH264. */ | |
281 | iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferH264)); | |
282 | if (!iq_matrix) | |
283 | return -1; | |
284 | memcpy(iq_matrix->ScalingList4x4, h->pps.scaling_matrix4, sizeof(iq_matrix->ScalingList4x4)); | |
285 | memcpy(iq_matrix->ScalingList8x8[0], h->pps.scaling_matrix8[0], sizeof(iq_matrix->ScalingList8x8[0])); | |
286 | memcpy(iq_matrix->ScalingList8x8[1], h->pps.scaling_matrix8[3], sizeof(iq_matrix->ScalingList8x8[0])); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | /** End a hardware decoding based frame. */ | |
291 | static int vaapi_h264_end_frame(AVCodecContext *avctx) | |
292 | { | |
293 | struct vaapi_context * const vactx = avctx->hwaccel_context; | |
294 | H264Context * const h = avctx->priv_data; | |
295 | int ret; | |
296 | ||
297 | av_dlog(avctx, "vaapi_h264_end_frame()\n"); | |
298 | ret = ff_vaapi_commit_slices(vactx); | |
299 | if (ret < 0) | |
300 | goto finish; | |
301 | ||
302 | ret = ff_vaapi_render_picture(vactx, ff_vaapi_get_surface_id(&h->cur_pic_ptr->f)); | |
303 | if (ret < 0) | |
304 | goto finish; | |
305 | ||
306 | ff_h264_draw_horiz_band(h, 0, h->avctx->height); | |
307 | ||
308 | finish: | |
309 | ff_vaapi_common_end_frame(avctx); | |
310 | return ret; | |
311 | } | |
312 | ||
313 | /** Decode the given H.264 slice with VA API. */ | |
314 | static int vaapi_h264_decode_slice(AVCodecContext *avctx, | |
315 | const uint8_t *buffer, | |
316 | uint32_t size) | |
317 | { | |
318 | H264Context * const h = avctx->priv_data; | |
319 | VASliceParameterBufferH264 *slice_param; | |
320 | ||
321 | av_dlog(avctx, "vaapi_h264_decode_slice(): buffer %p, size %d\n", | |
322 | buffer, size); | |
323 | ||
324 | /* Fill in VASliceParameterBufferH264. */ | |
325 | slice_param = (VASliceParameterBufferH264 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size); | |
326 | if (!slice_param) | |
327 | return -1; | |
328 | slice_param->slice_data_bit_offset = get_bits_count(&h->gb) + 8; /* bit buffer started beyond nal_unit_type */ | |
329 | slice_param->first_mb_in_slice = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x; | |
330 | slice_param->slice_type = ff_h264_get_slice_type(h); | |
331 | slice_param->direct_spatial_mv_pred_flag = h->slice_type == AV_PICTURE_TYPE_B ? h->direct_spatial_mv_pred : 0; | |
332 | slice_param->num_ref_idx_l0_active_minus1 = h->list_count > 0 ? h->ref_count[0] - 1 : 0; | |
333 | slice_param->num_ref_idx_l1_active_minus1 = h->list_count > 1 ? h->ref_count[1] - 1 : 0; | |
334 | slice_param->cabac_init_idc = h->cabac_init_idc; | |
335 | slice_param->slice_qp_delta = h->qscale - h->pps.init_qp; | |
336 | slice_param->disable_deblocking_filter_idc = h->deblocking_filter < 2 ? !h->deblocking_filter : h->deblocking_filter; | |
337 | slice_param->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2; | |
338 | slice_param->slice_beta_offset_div2 = h->slice_beta_offset / 2; | |
339 | slice_param->luma_log2_weight_denom = h->luma_log2_weight_denom; | |
340 | slice_param->chroma_log2_weight_denom = h->chroma_log2_weight_denom; | |
341 | ||
342 | fill_vaapi_RefPicList(slice_param->RefPicList0, h->ref_list[0], h->list_count > 0 ? h->ref_count[0] : 0); | |
343 | fill_vaapi_RefPicList(slice_param->RefPicList1, h->ref_list[1], h->list_count > 1 ? h->ref_count[1] : 0); | |
344 | ||
345 | fill_vaapi_plain_pred_weight_table(h, 0, | |
346 | &slice_param->luma_weight_l0_flag, slice_param->luma_weight_l0, slice_param->luma_offset_l0, | |
347 | &slice_param->chroma_weight_l0_flag, slice_param->chroma_weight_l0, slice_param->chroma_offset_l0); | |
348 | fill_vaapi_plain_pred_weight_table(h, 1, | |
349 | &slice_param->luma_weight_l1_flag, slice_param->luma_weight_l1, slice_param->luma_offset_l1, | |
350 | &slice_param->chroma_weight_l1_flag, slice_param->chroma_weight_l1, slice_param->chroma_offset_l1); | |
351 | return 0; | |
352 | } | |
353 | ||
354 | AVHWAccel ff_h264_vaapi_hwaccel = { | |
355 | .name = "h264_vaapi", | |
356 | .type = AVMEDIA_TYPE_VIDEO, | |
357 | .id = AV_CODEC_ID_H264, | |
358 | .pix_fmt = AV_PIX_FMT_VAAPI_VLD, | |
359 | .start_frame = vaapi_h264_start_frame, | |
360 | .end_frame = vaapi_h264_end_frame, | |
361 | .decode_slice = vaapi_h264_decode_slice, | |
362 | }; |