2 * MPEG-H Part 2 / HEVC / H.265 HW decode acceleration through VDPAU
4 * Copyright (c) 2013 Philip Langdale
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 Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <vdpau/vdpau.h>
27 #include "hevc_data.h"
31 #include "vdpau_internal.h"
33 static int vdpau_hevc_start_frame(AVCodecContext *avctx,
34 const uint8_t *buffer, uint32_t size)
36 HEVCContext *h = avctx->priv_data;
37 HEVCFrame *pic = h->ref;
38 struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
40 VdpPictureInfoHEVC *info = &pic_ctx->info.hevc;
42 const HEVCSPS *sps = h->ps.sps;
43 const HEVCPPS *pps = h->ps.pps;
44 const SliceHeader *sh = &h->sh;
45 const ScalingList *sl = pps->scaling_list_data_present_flag ?
46 &pps->scaling_list : &sps->scaling_list;
48 /* init VdpPictureInfoHEVC */
51 info->chroma_format_idc = sps->chroma_format_idc;
52 info->separate_colour_plane_flag = sps->separate_colour_plane_flag;
53 info->pic_width_in_luma_samples = sps->width;
54 info->pic_height_in_luma_samples = sps->height;
55 info->bit_depth_luma_minus8 = sps->bit_depth - 8;
56 info->bit_depth_chroma_minus8 = sps->bit_depth - 8;
57 info->log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4;
58 /* Provide the value corresponding to the nuh_temporal_id of the frame
60 info->sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
61 info->log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3;
62 info->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
63 info->log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2;
64 info->log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size;
65 info->max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter;
66 info->max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra;
67 info->scaling_list_enabled_flag = sps->scaling_list_enable_flag;
68 /* Scaling lists, in diagonal order, to be used for this frame. */
69 for (size_t i = 0; i < 6; i++) {
70 for (size_t j = 0; j < 16; j++) {
71 /* Scaling List for 4x4 quantization matrix,
72 indexed as ScalingList4x4[matrixId][i]. */
73 uint8_t pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
74 info->ScalingList4x4[i][j] = sl->sl[0][i][pos];
76 for (size_t j = 0; j < 64; j++) {
77 uint8_t pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
78 /* Scaling List for 8x8 quantization matrix,
79 indexed as ScalingList8x8[matrixId][i]. */
80 info->ScalingList8x8[i][j] = sl->sl[1][i][pos];
81 /* Scaling List for 16x16 quantization matrix,
82 indexed as ScalingList16x16[matrixId][i]. */
83 info->ScalingList16x16[i][j] = sl->sl[2][i][pos];
85 /* Scaling List for 32x32 quantization matrix,
86 indexed as ScalingList32x32[matrixId][i]. */
87 info->ScalingList32x32[i][j] = sl->sl[3][i * 3][pos];
90 /* Scaling List DC Coefficients for 16x16,
91 indexed as ScalingListDCCoeff16x16[matrixId]. */
92 info->ScalingListDCCoeff16x16[i] = sl->sl_dc[0][i];
94 /* Scaling List DC Coefficients for 32x32,
95 indexed as ScalingListDCCoeff32x32[matrixId]. */
96 info->ScalingListDCCoeff32x32[i] = sl->sl_dc[1][i * 3];
99 info->amp_enabled_flag = sps->amp_enabled_flag;
100 info->sample_adaptive_offset_enabled_flag = sps->sao_enabled;
101 info->pcm_enabled_flag = sps->pcm_enabled_flag;
102 if (info->pcm_enabled_flag) {
103 /* Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
104 info->pcm_sample_bit_depth_luma_minus1 = sps->pcm.bit_depth - 1;
105 /* Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
106 info->pcm_sample_bit_depth_chroma_minus1 = sps->pcm.bit_depth_chroma - 1;
107 /* Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
108 info->log2_min_pcm_luma_coding_block_size_minus3 = sps->pcm.log2_min_pcm_cb_size - 3;
109 /* Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
110 info->log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size;
111 /* Only needs to be set if pcm_enabled_flag is set. Ignored otherwise. */
112 info->pcm_loop_filter_disabled_flag = sps->pcm.loop_filter_disable_flag;
114 /* Per spec, when zero, assume short_term_ref_pic_set_sps_flag
116 info->num_short_term_ref_pic_sets = sps->nb_st_rps;
117 info->long_term_ref_pics_present_flag = sps->long_term_ref_pics_present_flag;
118 /* Only needed if long_term_ref_pics_present_flag is set. Ignored
120 info->num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps;
121 info->sps_temporal_mvp_enabled_flag = sps->sps_temporal_mvp_enabled_flag;
122 info->strong_intra_smoothing_enabled_flag = sps->sps_strong_intra_smoothing_enable_flag;
124 /* Copy the HEVC Picture Parameter Set bitstream fields. */
125 info->dependent_slice_segments_enabled_flag = pps->dependent_slice_segments_enabled_flag;
126 info->output_flag_present_flag = pps->output_flag_present_flag;
127 info->num_extra_slice_header_bits = pps->num_extra_slice_header_bits;
128 info->sign_data_hiding_enabled_flag = pps->sign_data_hiding_flag;
129 info->cabac_init_present_flag = pps->cabac_init_present_flag;
130 info->num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1;
131 info->num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1;
132 info->init_qp_minus26 = pps->pic_init_qp_minus26;
133 info->constrained_intra_pred_flag = pps->constrained_intra_pred_flag;
134 info->transform_skip_enabled_flag = pps->transform_skip_enabled_flag;
135 info->cu_qp_delta_enabled_flag = pps->cu_qp_delta_enabled_flag;
136 /* Only needed if cu_qp_delta_enabled_flag is set. Ignored otherwise. */
137 info->diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth;
138 info->pps_cb_qp_offset = pps->cb_qp_offset;
139 info->pps_cr_qp_offset = pps->cr_qp_offset;
140 info->pps_slice_chroma_qp_offsets_present_flag = pps->pic_slice_level_chroma_qp_offsets_present_flag;
141 info->weighted_pred_flag = pps->weighted_pred_flag;
142 info->weighted_bipred_flag = pps->weighted_bipred_flag;
143 info->transquant_bypass_enabled_flag = pps->transquant_bypass_enable_flag;
144 info->tiles_enabled_flag = pps->tiles_enabled_flag;
145 info->entropy_coding_sync_enabled_flag = pps->entropy_coding_sync_enabled_flag;
146 if (info->tiles_enabled_flag) {
147 /* Only valid if tiles_enabled_flag is set. Ignored otherwise. */
148 info->num_tile_columns_minus1 = pps->num_tile_columns - 1;
149 /* Only valid if tiles_enabled_flag is set. Ignored otherwise. */
150 info->num_tile_rows_minus1 = pps->num_tile_rows - 1;
151 /* Only valid if tiles_enabled_flag is set. Ignored otherwise. */
152 info->uniform_spacing_flag = pps->uniform_spacing_flag;
153 /* Only need to set 0..num_tile_columns_minus1. The struct
154 definition reserves up to the maximum of 20. Invalid values are
156 for (ssize_t i = 0; i < pps->num_tile_columns; i++) {
157 info->column_width_minus1[i] = pps->column_width[i] - 1;
159 /* Only need to set 0..num_tile_rows_minus1. The struct
160 definition reserves up to the maximum of 22. Invalid values are
162 for (ssize_t i = 0; i < pps->num_tile_rows; i++) {
163 info->row_height_minus1[i] = pps->row_height[i] - 1;
165 /* Only needed if tiles_enabled_flag is set. Invalid values are
167 info->loop_filter_across_tiles_enabled_flag = pps->loop_filter_across_tiles_enabled_flag;
169 info->pps_loop_filter_across_slices_enabled_flag = pps->seq_loop_filter_across_slices_enabled_flag;
170 info->deblocking_filter_control_present_flag = pps->deblocking_filter_control_present_flag;
171 /* Only valid if deblocking_filter_control_present_flag is set. Ignored
173 info->deblocking_filter_override_enabled_flag = pps->deblocking_filter_override_enabled_flag;
174 /* Only valid if deblocking_filter_control_present_flag is set. Ignored
176 info->pps_deblocking_filter_disabled_flag = pps->disable_dbf;
177 /* Only valid if deblocking_filter_control_present_flag is set and
178 pps_deblocking_filter_disabled_flag is not set. Ignored otherwise.*/
179 info->pps_beta_offset_div2 = pps->beta_offset / 2;
180 /* Only valid if deblocking_filter_control_present_flag is set and
181 pps_deblocking_filter_disabled_flag is not set. Ignored otherwise. */
182 info->pps_tc_offset_div2 = pps->tc_offset / 2;
183 info->lists_modification_present_flag = pps->lists_modification_present_flag;
184 info->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
185 info->slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag;
187 /* Set to 1 if nal_unit_type is equal to IDR_W_RADL or IDR_N_LP.
188 Set to zero otherwise. */
189 info->IDRPicFlag = IS_IDR(h);
190 /* Set to 1 if nal_unit_type in the range of BLA_W_LP to
191 RSV_IRAP_VCL23, inclusive. Set to zero otherwise.*/
192 info->RAPPicFlag = IS_IRAP(h);
193 /* See section 7.4.7.1 of the specification. */
194 info->CurrRpsIdx = sps->nb_st_rps;
195 if (sh->short_term_ref_pic_set_sps_flag == 1) {
196 for (size_t i = 0; i < sps->nb_st_rps; i++) {
197 if (sh->short_term_rps == &sps->st_rps[i]) {
198 info->CurrRpsIdx = i;
203 /* See section 7.4.7.2 of the specification. */
204 info->NumPocTotalCurr = ff_hevc_frame_nb_refs(h);
205 if (sh->short_term_ref_pic_set_sps_flag == 0 && sh->short_term_rps) {
206 /* Corresponds to specification field, NumDeltaPocs[RefRpsIdx].
207 Only applicable when short_term_ref_pic_set_sps_flag == 0.
208 Implementations will ignore this value in other cases. See 7.4.8. */
209 info->NumDeltaPocsOfRefRpsIdx = sh->short_term_rps->rps_idx_num_delta_pocs;
211 /* Section 7.6.3.1 of the H.265/HEVC Specification defines the syntax of
212 the slice_segment_header. This header contains information that
213 some VDPAU implementations may choose to skip. The VDPAU API
214 requires client applications to track the number of bits used in the
215 slice header for structures associated with short term and long term
216 reference pictures. First, VDPAU requires the number of bits used by
217 the short_term_ref_pic_set array in the slice_segment_header. */
218 info->NumShortTermPictureSliceHeaderBits = sh->short_term_ref_pic_set_size;
219 /* Second, VDPAU requires the number of bits used for long term reference
220 pictures in the slice_segment_header. This is equal to the number
221 of bits used for the contents of the block beginning with
222 "if(long_term_ref_pics_present_flag)". */
223 info->NumLongTermPictureSliceHeaderBits = sh->long_term_ref_pic_set_size;
225 /* The value of PicOrderCntVal of the picture in the access unit
226 containing the SEI message. The picture being decoded. */
227 info->CurrPicOrderCntVal = h->poc;
229 /* Slice Decoding Process - Reference Picture Sets */
230 for (size_t i = 0; i < 16; i++) {
231 info->RefPics[i] = VDP_INVALID_HANDLE;
232 info->PicOrderCntVal[i] = 0;
233 info->IsLongTerm[i] = 0;
235 for (size_t i = 0, j = 0; i < FF_ARRAY_ELEMS(h->DPB); i++) {
236 const HEVCFrame *frame = &h->DPB[i];
237 if (frame != h->ref && (frame->flags & (HEVC_FRAME_FLAG_LONG_REF |
238 HEVC_FRAME_FLAG_SHORT_REF))) {
240 av_log(avctx, AV_LOG_WARNING,
241 "VDPAU only supports up to 16 references in the DPB. "
242 "This frame may not be decoded correctly.\n");
245 /* Array of video reference surfaces.
246 Set any unused positions to VDP_INVALID_HANDLE. */
247 info->RefPics[j] = ff_vdpau_get_surface_id(frame->frame);
248 /* Array of picture order counts. These correspond to positions
249 in the RefPics array. */
250 info->PicOrderCntVal[j] = frame->poc;
251 /* Array used to specify whether a particular RefPic is
252 a long term reference. A value of "1" indicates a long-term
254 // XXX: Setting this caused glitches in the nvidia implementation
255 // Always setting it to zero, produces correct results
256 //info->IsLongTerm[j] = frame->flags & HEVC_FRAME_FLAG_LONG_REF;
257 info->IsLongTerm[j] = 0;
261 /* Copy of specification field, see Section 8.3.2 of the
262 H.265/HEVC Specification. */
263 info->NumPocStCurrBefore = h->rps[ST_CURR_BEF].nb_refs;
264 if (info->NumPocStCurrBefore > 8) {
265 av_log(avctx, AV_LOG_WARNING,
266 "VDPAU only supports up to 8 references in StCurrBefore. "
267 "This frame may not be decoded correctly.\n");
268 info->NumPocStCurrBefore = 8;
270 /* Copy of specification field, see Section 8.3.2 of the
271 H.265/HEVC Specification. */
272 info->NumPocStCurrAfter = h->rps[ST_CURR_AFT].nb_refs;
273 if (info->NumPocStCurrAfter > 8) {
274 av_log(avctx, AV_LOG_WARNING,
275 "VDPAU only supports up to 8 references in StCurrAfter. "
276 "This frame may not be decoded correctly.\n");
277 info->NumPocStCurrAfter = 8;
279 /* Copy of specification field, see Section 8.3.2 of the
280 H.265/HEVC Specification. */
281 info->NumPocLtCurr = h->rps[LT_CURR].nb_refs;
282 if (info->NumPocLtCurr > 8) {
283 av_log(avctx, AV_LOG_WARNING,
284 "VDPAU only supports up to 8 references in LtCurr. "
285 "This frame may not be decoded correctly.\n");
286 info->NumPocLtCurr = 8;
288 /* Reference Picture Set list, one of the short-term RPS. These
289 correspond to positions in the RefPics array. */
290 for (ssize_t i = 0, j = 0; i < h->rps[ST_CURR_BEF].nb_refs; i++) {
291 HEVCFrame *frame = h->rps[ST_CURR_BEF].ref[i];
294 uintptr_t id = ff_vdpau_get_surface_id(frame->frame);
295 for (size_t k = 0; k < 16; k++) {
296 if (id == info->RefPics[k]) {
297 info->RefPicSetStCurrBefore[j] = k;
304 av_log(avctx, AV_LOG_WARNING, "missing surface: %p\n",
308 av_log(avctx, AV_LOG_WARNING, "missing STR Before frame: %zd\n", i);
311 /* Reference Picture Set list, one of the short-term RPS. These
312 correspond to positions in the RefPics array. */
313 for (ssize_t i = 0, j = 0; i < h->rps[ST_CURR_AFT].nb_refs; i++) {
314 HEVCFrame *frame = h->rps[ST_CURR_AFT].ref[i];
317 uintptr_t id = ff_vdpau_get_surface_id(frame->frame);
318 for (size_t k = 0; k < 16; k++) {
319 if (id == info->RefPics[k]) {
320 info->RefPicSetStCurrAfter[j] = k;
327 av_log(avctx, AV_LOG_WARNING, "missing surface: %p\n",
331 av_log(avctx, AV_LOG_WARNING, "missing STR After frame: %zd\n", i);
334 /* Reference Picture Set list, one of the long-term RPS. These
335 correspond to positions in the RefPics array. */
336 for (ssize_t i = 0, j = 0; i < h->rps[LT_CURR].nb_refs; i++) {
337 HEVCFrame *frame = h->rps[LT_CURR].ref[i];
340 uintptr_t id = ff_vdpau_get_surface_id(frame->frame);
341 for (size_t k = 0; k < 16; k++) {
342 if (id == info->RefPics[k]) {
343 info->RefPicSetLtCurr[j] = k;
350 av_log(avctx, AV_LOG_WARNING, "missing surface: %p\n",
354 av_log(avctx, AV_LOG_WARNING, "missing LTR frame: %zd\n", i);
358 return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
361 static const uint8_t start_code_prefix[3] = { 0x00, 0x00, 0x01 };
363 static int vdpau_hevc_decode_slice(AVCodecContext *avctx,
364 const uint8_t *buffer, uint32_t size)
366 HEVCContext *h = avctx->priv_data;
367 struct vdpau_picture_context *pic_ctx = h->ref->hwaccel_picture_private;
370 val = ff_vdpau_add_buffer(pic_ctx, start_code_prefix, 3);
374 val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
381 static int vdpau_hevc_end_frame(AVCodecContext *avctx)
383 HEVCContext *h = avctx->priv_data;
384 struct vdpau_picture_context *pic_ctx = h->ref->hwaccel_picture_private;
387 val = ff_vdpau_common_end_frame(avctx, h->ref->frame, pic_ctx);
394 static int vdpau_hevc_init(AVCodecContext *avctx)
396 VdpDecoderProfile profile;
397 uint32_t level = avctx->level;
399 switch (avctx->profile) {
400 case FF_PROFILE_HEVC_MAIN:
401 profile = VDP_DECODER_PROFILE_HEVC_MAIN;
403 case FF_PROFILE_HEVC_MAIN_10:
404 profile = VDP_DECODER_PROFILE_HEVC_MAIN_10;
406 case FF_PROFILE_HEVC_MAIN_STILL_PICTURE:
407 profile = VDP_DECODER_PROFILE_HEVC_MAIN_STILL;
410 return AVERROR(ENOTSUP);
413 return ff_vdpau_common_init(avctx, profile, level);
416 AVHWAccel ff_hevc_vdpau_hwaccel = {
417 .name = "hevc_vdpau",
418 .type = AVMEDIA_TYPE_VIDEO,
419 .id = AV_CODEC_ID_HEVC,
420 .pix_fmt = AV_PIX_FMT_VDPAU,
421 .start_frame = vdpau_hevc_start_frame,
422 .end_frame = vdpau_hevc_end_frame,
423 .decode_slice = vdpau_hevc_decode_slice,
424 .frame_priv_data_size = sizeof(struct vdpau_picture_context),
425 .init = vdpau_hevc_init,
426 .uninit = ff_vdpau_common_uninit,
427 .priv_data_size = sizeof(VDPAUContext),
428 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,