src/gallium/state_trackers/omx/vid_dec_h265.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2016 Advanced Micro Devices, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "pipe/p_video_codec.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_video.h"
  31 #include "vl/vl_rbsp.h"
  32
  33 #include "entrypoint.h"
  34 #include "vid_dec.h"
  35
  36 #define DPB_MAX_SIZE 32
  37 #define MAX_NUM_REF_PICS 16
  38
  39 enum {
  40    NAL_UNIT_TYPE_TRAIL_N = 0,
  41    NAL_UNIT_TYPE_TRAIL_R = 1,
  42    NAL_UNIT_TYPE_TSA_N = 2,
  43    NAL_UNIT_TYPE_TSA_R = 3,
  44    NAL_UNIT_TYPE_STSA_N = 4,
  45    NAL_UNIT_TYPE_STSA_R = 5,
  46    NAL_UNIT_TYPE_RADL_N = 6,
  47    NAL_UNIT_TYPE_RADL_R = 7,
  48    NAL_UNIT_TYPE_RASL_N = 8,
  49    NAL_UNIT_TYPE_RASL_R = 9,
  50    NAL_UNIT_TYPE_BLA_W_LP = 16,
  51    NAL_UNIT_TYPE_BLA_W_RADL = 17,
  52    NAL_UNIT_TYPE_BLA_N_LP =  18,
  53    NAL_UNIT_TYPE_IDR_W_RADL = 19,
  54    NAL_UNIT_TYPE_IDR_N_LP = 20,
  55    NAL_UNIT_TYPE_CRA = 21,
  56    NAL_UNIT_TYPE_SPS = 33,
  57    NAL_UNIT_TYPE_PPS = 34,
  58 };
  59
  60 struct dpb_list {
  61    struct list_head list;
  62    struct pipe_video_buffer *buffer;
  63    OMX_TICKS timestamp;
  64    unsigned poc;
  65 };
  66
  67 struct ref_pic_set {
  68   unsigned  num_pics;
  69   unsigned  num_neg_pics;
  70   unsigned  num_pos_pics;
  71   unsigned  num_delta_poc;
  72   int  delta_poc[MAX_NUM_REF_PICS];
  73   bool used[MAX_NUM_REF_PICS];
  74 };
  75
  76 static bool is_idr_picture(unsigned nal_unit_type)
  77 {
  78    return (nal_unit_type == NAL_UNIT_TYPE_IDR_W_RADL ||
  79            nal_unit_type == NAL_UNIT_TYPE_IDR_N_LP);
  80 }
  81
  82 /* broken link access picture */
  83 static bool is_bla_picture(unsigned nal_unit_type)
  84 {
  85    return (nal_unit_type == NAL_UNIT_TYPE_BLA_W_LP ||
  86            nal_unit_type == NAL_UNIT_TYPE_BLA_W_RADL ||
  87            nal_unit_type == NAL_UNIT_TYPE_BLA_N_LP);
  88 }
  89
  90 /* random access point picture */
  91 static bool is_rap_picture(unsigned nal_unit_type)
  92 {
  93    return (nal_unit_type >= NAL_UNIT_TYPE_BLA_W_LP &&
  94            nal_unit_type <= NAL_UNIT_TYPE_CRA);
  95 }
  96
  97 static bool is_slice_picture(unsigned nal_unit_type)
  98 {
  99    return (nal_unit_type <= NAL_UNIT_TYPE_RASL_R ||
 100            is_rap_picture(nal_unit_type));
 101 }
 102
 103 static void set_poc(vid_dec_PrivateType *priv,
 104                     unsigned nal_unit_type, int i)
 105 {
 106    priv->picture.h265.CurrPicOrderCntVal = i;
 107
 108    if (priv->codec_data.h265.temporal_id == 0 &&
 109        (nal_unit_type == NAL_UNIT_TYPE_TRAIL_R ||
 110         nal_unit_type == NAL_UNIT_TYPE_TSA_R ||
 111         nal_unit_type == NAL_UNIT_TYPE_STSA_R ||
 112         is_rap_picture(nal_unit_type)))
 113       priv->codec_data.h265.slice_prev_poc = i;
 114 }
 115
 116 static unsigned get_poc(vid_dec_PrivateType *priv)
 117 {
 118    return priv->picture.h265.CurrPicOrderCntVal;
 119 }
 120
 121 static void profile_tier(struct vl_rbsp *rbsp)
 122 {
 123    int i;
 124
 125    /* general_profile_space */
 126    vl_rbsp_u(rbsp, 2);
 127
 128    /* general_tier_flag */
 129    vl_rbsp_u(rbsp, 1);
 130
 131    /* general_profile_idc */
 132    vl_rbsp_u(rbsp, 5);
 133
 134    /* general_profile_compatibility_flag */
 135    for(i = 0; i < 32; ++i)
 136       vl_rbsp_u(rbsp, 1);
 137
 138    /* general_progressive_source_flag */
 139    vl_rbsp_u(rbsp, 1);
 140
 141    /* general_interlaced_source_flag */
 142    vl_rbsp_u(rbsp, 1);
 143
 144    /* general_non_packed_constraint_flag */
 145    vl_rbsp_u(rbsp, 1);
 146
 147    /* general_frame_only_constraint_flag */
 148    vl_rbsp_u(rbsp, 1);
 149
 150    /* general_reserved_zero_44bits */
 151    vl_rbsp_u(rbsp, 16);
 152    vl_rbsp_u(rbsp, 16);
 153    vl_rbsp_u(rbsp, 12);
 154 }
 155
 156 static unsigned profile_tier_level(struct vl_rbsp *rbsp,
 157                                    int max_sublayers_minus1)
 158 {
 159    bool sub_layer_profile_present_flag[6];
 160    bool sub_layer_level_present_flag[6];
 161    unsigned level_idc;
 162    int i;
 163
 164    profile_tier(rbsp);
 165
 166    /* general_level_idc */
 167    level_idc = vl_rbsp_u(rbsp, 8);
 168
 169    for (i = 0; i < max_sublayers_minus1; ++i) {
 170       sub_layer_profile_present_flag[i] = vl_rbsp_u(rbsp, 1);
 171       sub_layer_level_present_flag[i] = vl_rbsp_u(rbsp, 1);
 172    }
 173
 174    if (max_sublayers_minus1 > 0)
 175       for (i = max_sublayers_minus1; i < 8; ++i)
 176          /* reserved_zero_2bits */
 177          vl_rbsp_u(rbsp, 2);
 178
 179    for (i = 0; i < max_sublayers_minus1; ++i) {
 180       if (sub_layer_profile_present_flag[i])
 181          profile_tier(rbsp);
 182
 183       if (sub_layer_level_present_flag[i])
 184          /* sub_layer_level_idc */
 185          vl_rbsp_u(rbsp, 8);
 186    }
 187
 188    return level_idc;
 189 }
 190
 191 static void scaling_list_data(void)
 192 {
 193    /* TODO */
 194    assert(0);
 195 }
 196
 197 static void st_ref_pic_set(vid_dec_PrivateType *priv, struct vl_rbsp *rbsp,
 198                            struct ref_pic_set *rps, struct pipe_h265_sps *sps,
 199                            unsigned idx)
 200 {
 201    bool inter_rps_pred_flag;
 202    unsigned delta_idx_minus1;
 203    int delta_poc;
 204    int i;
 205
 206    inter_rps_pred_flag = (idx != 0) ? (vl_rbsp_u(rbsp, 1)) : false;
 207
 208    if (inter_rps_pred_flag) {
 209       struct ref_pic_set *ref_rps;
 210       unsigned sign, abs;
 211       int delta_rps;
 212       bool used;
 213       int j;
 214
 215       if (idx == sps->num_short_term_ref_pic_sets)
 216          delta_idx_minus1 = vl_rbsp_ue(rbsp);
 217       else
 218          delta_idx_minus1 = 0;
 219
 220       ref_rps = (struct ref_pic_set *)
 221          priv->codec_data.h265.ref_pic_set_list + idx - (delta_idx_minus1 + 1);
 222
 223       /* delta_rps_sign */
 224       sign = vl_rbsp_u(rbsp, 1);
 225       /* abs_delta_rps_minus1 */
 226       abs = vl_rbsp_ue(rbsp);
 227       delta_rps = (1 - 2 * sign) * (abs + 1);
 228
 229       rps->num_neg_pics = 0;
 230       rps->num_pos_pics = 0;
 231       rps->num_pics = 0;
 232
 233       for(i = 0 ; i <= ref_rps->num_pics; ++i) {
 234          /* used_by_curr_pic_flag */
 235          if (!vl_rbsp_u(rbsp, 1))
 236             /* use_delta_flag */
 237             vl_rbsp_u(rbsp, 1);
 238          else {
 239             delta_poc = delta_rps +
 240                ((i < ref_rps->num_pics)? ref_rps->delta_poc[i] : 0);
 241             rps->delta_poc[rps->num_pics] = delta_poc;
 242             rps->used[rps->num_pics] = true;
 243             if (delta_poc < 0)
 244                rps->num_neg_pics++;
 245             else
 246                rps->num_pos_pics++;
 247             rps->num_pics++;
 248          }
 249       }
 250
 251       rps->num_delta_poc = ref_rps->num_pics;
 252
 253       /* sort delta poc */
 254       for (i = 1; i < rps->num_pics; ++i) {
 255          delta_poc = rps->delta_poc[i];
 256          used = rps->used[i];
 257          for (j = i - 1; j >= 0; j--) {
 258             if (delta_poc < rps->delta_poc[j]) {
 259                rps->delta_poc[j + 1] = rps->delta_poc[j];
 260                rps->used[j + 1] = rps->used[j];
 261                rps->delta_poc[j] = delta_poc;
 262                rps->used[j] = used;
 263             }
 264          }
 265       }
 266
 267       for (i = 0 , j = rps->num_neg_pics - 1;
 268            i < rps->num_neg_pics >> 1; i++, j--) {
 269          delta_poc = rps->delta_poc[i];
 270          used = rps->used[i];
 271          rps->delta_poc[i] = rps->delta_poc[j];
 272          rps->used[i] = rps->used[j];
 273          rps->delta_poc[j] = delta_poc;
 274          rps->used[j] = used;
 275       }
 276    } else {
 277       /* num_negative_pics */
 278       rps->num_neg_pics = vl_rbsp_ue(rbsp);
 279       /* num_positive_pics */
 280       rps->num_pos_pics = vl_rbsp_ue(rbsp);
 281       rps->num_pics = rps->num_neg_pics + rps->num_pos_pics;
 282
 283       delta_poc = 0;
 284       for(i = 0 ; i < rps->num_neg_pics; ++i) {
 285          /* delta_poc_s0_minus1 */
 286          delta_poc -= (vl_rbsp_ue(rbsp) + 1);
 287          rps->delta_poc[i] = delta_poc;
 288          /* used_by_curr_pic_s0_flag */
 289          rps->used[i] = vl_rbsp_u(rbsp, 1);
 290       }
 291
 292       delta_poc = 0;
 293       for(i = rps->num_neg_pics; i < rps->num_pics; ++i) {
 294          /* delta_poc_s1_minus1 */
 295          delta_poc += (vl_rbsp_ue(rbsp) + 1);
 296          rps->delta_poc[i] = delta_poc;
 297          /* used_by_curr_pic_s1_flag */
 298          rps->used[i] = vl_rbsp_u(rbsp, 1);
 299       }
 300    }
 301 }
 302
 303 static struct pipe_h265_sps *seq_parameter_set_id(vid_dec_PrivateType *priv,
 304                                                   struct vl_rbsp *rbsp)
 305 {
 306    unsigned id = vl_rbsp_ue(rbsp);
 307
 308    if (id >= ARRAY_SIZE(priv->codec_data.h265.sps))
 309       return NULL;
 310
 311    return &priv->codec_data.h265.sps[id];
 312 }
 313
 314 static void seq_parameter_set(vid_dec_PrivateType *priv, struct vl_rbsp *rbsp)
 315 {
 316    struct pipe_h265_sps *sps;
 317    int sps_max_sub_layers_minus1;
 318    unsigned i;
 319
 320    /* sps_video_parameter_set_id */
 321    vl_rbsp_u(rbsp, 4);
 322
 323    /* sps_max_sub_layers_minus1 */
 324    sps_max_sub_layers_minus1 = vl_rbsp_u(rbsp, 3);
 325
 326    assert(sps_max_sub_layers_minus1 <= 6);
 327
 328    /* sps_temporal_id_nesting_flag */
 329    vl_rbsp_u(rbsp, 1);
 330
 331    priv->codec_data.h265.level_idc =
 332       profile_tier_level(rbsp, sps_max_sub_layers_minus1);
 333
 334    sps = seq_parameter_set_id(priv, rbsp);
 335    if (!sps)
 336       return;
 337
 338    memset(sps, 0, sizeof(*sps));
 339
 340    sps->chroma_format_idc = vl_rbsp_ue(rbsp);
 341
 342    if (sps->chroma_format_idc == 3)
 343       sps->separate_colour_plane_flag = vl_rbsp_u(rbsp, 1);
 344
 345    priv->codec_data.h265.pic_width_in_luma_samples =
 346       sps->pic_width_in_luma_samples = vl_rbsp_ue(rbsp);
 347
 348    priv->codec_data.h265.pic_height_in_luma_samples =
 349       sps->pic_height_in_luma_samples = vl_rbsp_ue(rbsp);
 350
 351    /* conformance_window_flag */
 352    if (vl_rbsp_u(rbsp, 1)) {
 353       /* conf_win_left_offset */
 354       vl_rbsp_ue(rbsp);
 355       /* conf_win_right_offset */
 356       vl_rbsp_ue(rbsp);
 357       /* conf_win_top_offset */
 358       vl_rbsp_ue(rbsp);
 359       /* conf_win_bottom_offset */
 360       vl_rbsp_ue(rbsp);
 361    }
 362
 363    sps->bit_depth_luma_minus8 = vl_rbsp_ue(rbsp);
 364    sps->bit_depth_chroma_minus8 = vl_rbsp_ue(rbsp);
 365    sps->log2_max_pic_order_cnt_lsb_minus4 = vl_rbsp_ue(rbsp);
 366
 367    /* sps_sub_layer_ordering_info_present_flag */
 368    i  = vl_rbsp_u(rbsp, 1) ? 0 : sps_max_sub_layers_minus1;
 369    for (; i <= sps_max_sub_layers_minus1; ++i) {
 370       sps->sps_max_dec_pic_buffering_minus1 = vl_rbsp_ue(rbsp);
 371       /* sps_max_num_reorder_pics */
 372       vl_rbsp_ue(rbsp);
 373       /* sps_max_latency_increase_plus */
 374       vl_rbsp_ue(rbsp);
 375    }
 376
 377    sps->log2_min_luma_coding_block_size_minus3 = vl_rbsp_ue(rbsp);
 378    sps->log2_diff_max_min_luma_coding_block_size = vl_rbsp_ue(rbsp);
 379    sps->log2_min_transform_block_size_minus2 = vl_rbsp_ue(rbsp);
 380    sps->log2_diff_max_min_transform_block_size = vl_rbsp_ue(rbsp);
 381    sps->max_transform_hierarchy_depth_inter = vl_rbsp_ue(rbsp);
 382    sps->max_transform_hierarchy_depth_intra = vl_rbsp_ue(rbsp);
 383
 384    sps->scaling_list_enabled_flag = vl_rbsp_u(rbsp, 1);
 385    if (sps->scaling_list_enabled_flag)
 386       /* sps_scaling_list_data_present_flag */
 387       if (vl_rbsp_u(rbsp, 1))
 388          scaling_list_data();
 389
 390    sps->amp_enabled_flag = vl_rbsp_u(rbsp, 1);
 391    sps->sample_adaptive_offset_enabled_flag = vl_rbsp_u(rbsp, 1);
 392    sps->pcm_enabled_flag = vl_rbsp_u(rbsp, 1);
 393    if (sps->pcm_enabled_flag) {
 394       sps->pcm_sample_bit_depth_luma_minus1 = vl_rbsp_u(rbsp, 4);
 395       sps->pcm_sample_bit_depth_chroma_minus1 = vl_rbsp_u(rbsp, 4);
 396       sps->log2_min_pcm_luma_coding_block_size_minus3 = vl_rbsp_ue(rbsp);
 397       sps->log2_diff_max_min_pcm_luma_coding_block_size = vl_rbsp_ue(rbsp);
 398       sps->pcm_loop_filter_disabled_flag = vl_rbsp_u(rbsp, 1);
 399    }
 400
 401    sps->num_short_term_ref_pic_sets = vl_rbsp_ue(rbsp);
 402
 403    for (i = 0; i < sps->num_short_term_ref_pic_sets; ++i) {
 404       struct ref_pic_set *rps;
 405
 406       rps = (struct ref_pic_set *)
 407          priv->codec_data.h265.ref_pic_set_list + i;
 408       st_ref_pic_set(priv, rbsp, rps, sps, i);
 409    }
 410
 411    sps->long_term_ref_pics_present_flag = vl_rbsp_u(rbsp, 1);
 412    if (sps->long_term_ref_pics_present_flag) {
 413       sps->num_long_term_ref_pics_sps = vl_rbsp_ue(rbsp);
 414       for (i = 0; i < sps->num_long_term_ref_pics_sps; ++i) {
 415          /* lt_ref_pic_poc_lsb_sps */
 416          vl_rbsp_u(rbsp, sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
 417          /* used_by_curr_pic_lt_sps_flag */
 418          vl_rbsp_u(rbsp, 1);
 419       }
 420    }
 421
 422    sps->sps_temporal_mvp_enabled_flag = vl_rbsp_u(rbsp, 1);
 423    sps->strong_intra_smoothing_enabled_flag = vl_rbsp_u(rbsp, 1);
 424 }
 425
 426 static struct pipe_h265_pps *pic_parameter_set_id(vid_dec_PrivateType *priv,
 427                                                   struct vl_rbsp *rbsp)
 428 {
 429    unsigned id = vl_rbsp_ue(rbsp);
 430
 431    if (id >= ARRAY_SIZE(priv->codec_data.h265.pps))
 432       return NULL;
 433
 434    return &priv->codec_data.h265.pps[id];
 435 }
 436
 437 static void picture_parameter_set(vid_dec_PrivateType *priv,
 438                                   struct vl_rbsp *rbsp)
 439 {
 440    struct pipe_h265_sps *sps;
 441    struct pipe_h265_pps *pps;
 442    int i;
 443
 444    pps = pic_parameter_set_id(priv, rbsp);
 445    if (!pps)
 446       return;
 447
 448    memset(pps, 0, sizeof(*pps));
 449    sps = pps->sps = seq_parameter_set_id(priv, rbsp);
 450    if (!sps)
 451       return;
 452
 453    pps->dependent_slice_segments_enabled_flag = vl_rbsp_u(rbsp, 1);
 454    pps->output_flag_present_flag = vl_rbsp_u(rbsp, 1);
 455    pps->num_extra_slice_header_bits = vl_rbsp_u(rbsp, 3);
 456    pps->sign_data_hiding_enabled_flag = vl_rbsp_u(rbsp, 1);
 457    pps->cabac_init_present_flag = vl_rbsp_u(rbsp, 1);
 458
 459    pps->num_ref_idx_l0_default_active_minus1 = vl_rbsp_ue(rbsp);
 460    pps->num_ref_idx_l1_default_active_minus1 = vl_rbsp_ue(rbsp);
 461    pps->init_qp_minus26 = vl_rbsp_se(rbsp);
 462    pps->constrained_intra_pred_flag = vl_rbsp_u(rbsp, 1);
 463    pps->transform_skip_enabled_flag = vl_rbsp_u(rbsp, 1);
 464
 465    pps->cu_qp_delta_enabled_flag = vl_rbsp_u(rbsp, 1);
 466    if (pps->cu_qp_delta_enabled_flag)
 467       pps->diff_cu_qp_delta_depth = vl_rbsp_ue(rbsp);
 468
 469    pps->pps_cb_qp_offset = vl_rbsp_se(rbsp);
 470    pps->pps_cr_qp_offset = vl_rbsp_se(rbsp);
 471    pps->pps_slice_chroma_qp_offsets_present_flag = vl_rbsp_u(rbsp, 1);
 472
 473    pps->weighted_pred_flag = vl_rbsp_u(rbsp, 1);
 474    pps->weighted_bipred_flag = vl_rbsp_u(rbsp, 1);
 475
 476    pps->transquant_bypass_enabled_flag = vl_rbsp_u(rbsp, 1);
 477    pps->tiles_enabled_flag = vl_rbsp_u(rbsp, 1);
 478    pps->entropy_coding_sync_enabled_flag = vl_rbsp_u(rbsp, 1);
 479
 480    if (pps->tiles_enabled_flag) {
 481       pps->num_tile_columns_minus1 = vl_rbsp_ue(rbsp);
 482       pps->num_tile_rows_minus1 = vl_rbsp_ue(rbsp);
 483
 484       pps->uniform_spacing_flag = vl_rbsp_u(rbsp, 1);
 485       if (!pps->uniform_spacing_flag) {
 486          for (i = 0; i < pps->num_tile_columns_minus1; ++i)
 487             pps->column_width_minus1[i] = vl_rbsp_ue(rbsp);
 488
 489          for (i = 0; i < pps->num_tile_rows_minus1; ++i)
 490             pps->row_height_minus1[i] = vl_rbsp_ue(rbsp);
 491       }
 492
 493       if (!pps->num_tile_columns_minus1 || !pps->num_tile_rows_minus1)
 494          pps->loop_filter_across_tiles_enabled_flag = vl_rbsp_u(rbsp, 1);
 495    }
 496
 497    pps->pps_loop_filter_across_slices_enabled_flag = vl_rbsp_u(rbsp, 1);
 498
 499    pps->deblocking_filter_control_present_flag = vl_rbsp_u(rbsp, 1);
 500    if (pps->deblocking_filter_control_present_flag) {
 501       pps->deblocking_filter_override_enabled_flag = vl_rbsp_u(rbsp, 1);
 502       pps->pps_deblocking_filter_disabled_flag = vl_rbsp_u(rbsp, 1);
 503       if (!pps->pps_deblocking_filter_disabled_flag) {
 504          pps->pps_beta_offset_div2 = vl_rbsp_se(rbsp);
 505          pps->pps_tc_offset_div2 = vl_rbsp_se(rbsp);
 506       }
 507    }
 508
 509    /* pps_scaling_list_data_present_flag */
 510    if (vl_rbsp_u(rbsp, 1))
 511       scaling_list_data();
 512
 513    pps->lists_modification_present_flag = vl_rbsp_u(rbsp, 1);
 514    pps->log2_parallel_merge_level_minus2 = vl_rbsp_ue(rbsp);
 515    pps->slice_segment_header_extension_present_flag = vl_rbsp_u(rbsp, 1);
 516 }
 517
 518 static void vid_dec_h265_BeginFrame(vid_dec_PrivateType *priv)
 519 {
 520    if (priv->frame_started)
 521       return;
 522
 523    vid_dec_NeedTarget(priv);
 524    if (priv->first_buf_in_frame)
 525       priv->timestamp = priv->timestamps[0];
 526    priv->first_buf_in_frame = false;
 527
 528    if (!priv->codec) {
 529       struct pipe_video_codec templat = {};
 530
 531       templat.profile = priv->profile;
 532       templat.entrypoint = PIPE_VIDEO_ENTRYPOINT_BITSTREAM;
 533       templat.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
 534       templat.expect_chunked_decode = true;
 535       templat.width = priv->codec_data.h265.pic_width_in_luma_samples;
 536       templat.height = priv->codec_data.h265.pic_height_in_luma_samples;
 537       templat.level =  priv->codec_data.h265.level_idc;
 538       priv->codec = priv->pipe->create_video_codec(priv->pipe, &templat);
 539    }
 540    priv->codec->begin_frame(priv->codec, priv->target, &priv->picture.base);
 541    priv->frame_started = true;
 542 }
 543
 544 static struct pipe_video_buffer *vid_dec_h265_Flush(vid_dec_PrivateType *priv,
 545                                                     OMX_TICKS *timestamp)
 546 {
 547    struct dpb_list *entry, *result = NULL;
 548    struct pipe_video_buffer *buf;
 549
 550    /* search for the lowest poc and break on zeros */
 551    LIST_FOR_EACH_ENTRY(entry, &priv->codec_data.h265.dpb_list, list) {
 552
 553       if (result && entry->poc == 0)
 554          break;
 555
 556       if (!result || entry->poc < result->poc)
 557          result = entry;
 558    }
 559
 560    if (!result)
 561       return NULL;
 562
 563    buf = result->buffer;
 564    if (timestamp)
 565       *timestamp = result->timestamp;
 566
 567    --priv->codec_data.h265.dpb_num;
 568    LIST_DEL(&result->list);
 569    FREE(result);
 570
 571    return buf;
 572 }
 573
 574 static void vid_dec_h265_EndFrame(vid_dec_PrivateType *priv)
 575 {
 576    struct dpb_list *entry = NULL;
 577    struct pipe_video_buffer *tmp;
 578    struct ref_pic_set *rps;
 579    int i;
 580    OMX_TICKS timestamp;
 581
 582    if (!priv->frame_started)
 583       return;
 584
 585    priv->picture.h265.NumPocStCurrBefore = 0;
 586    priv->picture.h265.NumPocStCurrAfter = 0;
 587    memset(priv->picture.h265.RefPicSetStCurrBefore, 0, 8);
 588    memset(priv->picture.h265.RefPicSetStCurrAfter, 0, 8);
 589    for (i = 0; i < MAX_NUM_REF_PICS; ++i) {
 590       priv->picture.h265.ref[i] = NULL;
 591       priv->picture.h265.PicOrderCntVal[i] = 0;
 592    }
 593
 594    rps = priv->codec_data.h265.rps;
 595
 596    if (rps) {
 597       priv->picture.h265.NumDeltaPocsOfRefRpsIdx = rps->num_delta_poc;
 598       for (i = 0; i < rps->num_pics; ++i) {
 599          priv->picture.h265.PicOrderCntVal[i] =
 600             rps->delta_poc[i] + get_poc(priv);
 601
 602          LIST_FOR_EACH_ENTRY(entry, &priv->codec_data.h265.dpb_list, list) {
 603             if (entry->poc == priv->picture.h265.PicOrderCntVal[i]) {
 604                priv->picture.h265.ref[i] = entry->buffer;
 605                break;
 606             }
 607          }
 608
 609          if (rps->used[i]) {
 610             if (i < rps->num_neg_pics) {
 611                priv->picture.h265.NumPocStCurrBefore++;
 612                priv->picture.h265.RefPicSetStCurrBefore[i] = i;
 613             } else {
 614                int j = i - rps->num_neg_pics;
 615                priv->picture.h265.NumPocStCurrAfter++;
 616                priv->picture.h265.RefPicSetStCurrAfter[j] = i;
 617             }
 618          }
 619       }
 620    }
 621
 622    priv->codec->end_frame(priv->codec, priv->target, &priv->picture.base);
 623    priv->frame_started = false;
 624
 625    /* add the decoded picture to the dpb list */
 626    entry = CALLOC_STRUCT(dpb_list);
 627    if (!entry)
 628       return;
 629
 630    priv->first_buf_in_frame = true;
 631    entry->buffer = priv->target;
 632    entry->timestamp = priv->timestamp;
 633    entry->poc = get_poc(priv);
 634
 635    LIST_ADDTAIL(&entry->list, &priv->codec_data.h265.dpb_list);
 636    ++priv->codec_data.h265.dpb_num;
 637    priv->target = NULL;
 638
 639    if (priv->codec_data.h265.dpb_num <= DPB_MAX_SIZE)
 640       return;
 641
 642    tmp = priv->in_buffers[0]->pInputPortPrivate;
 643    priv->in_buffers[0]->pInputPortPrivate = vid_dec_h265_Flush(priv, &timestamp);
 644    priv->in_buffers[0]->nTimeStamp = timestamp;
 645    priv->target = tmp;
 646    priv->frame_finished = priv->in_buffers[0]->pInputPortPrivate != NULL;
 647    if (priv->frame_finished &&
 648        (priv->in_buffers[0]->nFlags & OMX_BUFFERFLAG_EOS))
 649       FREE(priv->codec_data.h265.ref_pic_set_list);
 650 }
 651
 652 static void slice_header(vid_dec_PrivateType *priv, struct vl_rbsp *rbsp,
 653                          unsigned nal_unit_type)
 654 {
 655    struct pipe_h265_pps *pps;
 656    struct pipe_h265_sps *sps;
 657    bool first_slice_segment_in_pic_flag;
 658    bool dependent_slice_segment_flag = false;
 659    struct ref_pic_set *rps = NULL;
 660    unsigned poc_lsb, poc_msb, slice_prev_poc;
 661    unsigned max_poc_lsb, prev_poc_lsb, prev_poc_msb;
 662    unsigned num_st_rps;
 663    int i;
 664
 665    if (priv->picture.h265.IDRPicFlag != is_idr_picture(nal_unit_type))
 666       vid_dec_h265_EndFrame(priv);
 667
 668    priv->picture.h265.IDRPicFlag = is_idr_picture(nal_unit_type);
 669
 670    first_slice_segment_in_pic_flag = vl_rbsp_u(rbsp, 1);
 671
 672    if (is_rap_picture(nal_unit_type))
 673       /* no_output_of_prior_pics_flag */
 674       vl_rbsp_u(rbsp, 1);
 675
 676    pps = pic_parameter_set_id(priv, rbsp);
 677    if (!pps)
 678       return;
 679
 680    sps = pps->sps;
 681    if (!sps)
 682       return;
 683
 684    if (pps != priv->picture.h265.pps)
 685       vid_dec_h265_EndFrame(priv);
 686
 687    priv->picture.h265.pps = pps;
 688
 689    if (priv->picture.h265.RAPPicFlag != is_rap_picture(nal_unit_type))
 690       vid_dec_h265_EndFrame(priv);
 691    priv->picture.h265.RAPPicFlag = is_rap_picture(nal_unit_type);
 692
 693    num_st_rps = sps->num_short_term_ref_pic_sets;
 694
 695    if (priv->picture.h265.CurrRpsIdx != num_st_rps)
 696       vid_dec_h265_EndFrame(priv);
 697    priv->picture.h265.CurrRpsIdx = num_st_rps;
 698
 699    if (!first_slice_segment_in_pic_flag) {
 700       int size, num;
 701       int bits_slice_segment_address = 0;
 702
 703       if (pps->dependent_slice_segments_enabled_flag)
 704          dependent_slice_segment_flag = vl_rbsp_u(rbsp, 1);
 705
 706       size = 1 << (sps->log2_min_luma_coding_block_size_minus3 + 3 +
 707                    sps->log2_diff_max_min_luma_coding_block_size);
 708
 709       num = ((sps->pic_width_in_luma_samples + size - 1) / size) *
 710             ((sps->pic_height_in_luma_samples + size - 1) / size);
 711
 712       while (num > (1 << bits_slice_segment_address))
 713          bits_slice_segment_address++;
 714
 715       /* slice_segment_address */
 716       vl_rbsp_u(rbsp, bits_slice_segment_address);
 717    }
 718
 719    if (dependent_slice_segment_flag)
 720       return;
 721
 722    for (i = 0; i < pps->num_extra_slice_header_bits; ++i)
 723       /* slice_reserved_flag */
 724       vl_rbsp_u(rbsp, 1);
 725
 726    /* slice_type */
 727    vl_rbsp_ue(rbsp);
 728
 729    if (pps->output_flag_present_flag)
 730       /* pic output flag */
 731       vl_rbsp_u(rbsp, 1);
 732
 733    if (sps->separate_colour_plane_flag)
 734       /* colour_plane_id */
 735       vl_rbsp_u(rbsp, 2);
 736
 737    if (is_idr_picture(nal_unit_type)) {
 738       set_poc(priv, nal_unit_type, 0);
 739       return;
 740    }
 741
 742    /* slice_pic_order_cnt_lsb */
 743    poc_lsb =
 744       vl_rbsp_u(rbsp, sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
 745
 746    slice_prev_poc = (int)priv->codec_data.h265.slice_prev_poc;
 747    max_poc_lsb = 1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
 748
 749    prev_poc_lsb = slice_prev_poc & (max_poc_lsb - 1);
 750    prev_poc_msb = slice_prev_poc - prev_poc_lsb;
 751
 752    if ((poc_lsb < prev_poc_lsb) &&
 753        ((prev_poc_lsb - poc_lsb ) >= (max_poc_lsb / 2)))
 754       poc_msb = prev_poc_msb + max_poc_lsb;
 755
 756    else if ((poc_lsb > prev_poc_lsb ) &&
 757             ((poc_lsb - prev_poc_lsb) > (max_poc_lsb / 2)))
 758       poc_msb = prev_poc_msb - max_poc_lsb;
 759
 760    else
 761       poc_msb = prev_poc_msb;
 762
 763    if (is_bla_picture(nal_unit_type))
 764       poc_msb = 0;
 765
 766    if (get_poc(priv) != poc_msb + poc_lsb)
 767       vid_dec_h265_EndFrame(priv);
 768
 769    set_poc(priv, nal_unit_type, (poc_msb + poc_lsb));
 770
 771    /* short_term_ref_pic_set_sps_flag */
 772    if (!vl_rbsp_u(rbsp, 1)) {
 773       rps = (struct ref_pic_set *)
 774          priv->codec_data.h265.ref_pic_set_list + num_st_rps;
 775       st_ref_pic_set(priv, rbsp, rps, sps, num_st_rps);
 776
 777    } else if (num_st_rps > 1) {
 778       int num_bits = 0;
 779       unsigned idx;
 780
 781       while ((1 << num_bits) < num_st_rps)
 782          num_bits++;
 783
 784       if (num_bits > 0)
 785          /* short_term_ref_pic_set_idx */
 786          idx = vl_rbsp_u(rbsp, num_bits);
 787       else
 788          idx = 0;
 789
 790       rps = (struct ref_pic_set *)
 791          priv->codec_data.h265.ref_pic_set_list + idx;
 792    }
 793
 794    if (is_bla_picture(nal_unit_type)) {
 795       rps->num_neg_pics = 0;
 796       rps->num_pos_pics = 0;
 797       rps->num_pics = 0;
 798    }
 799
 800    priv->codec_data.h265.rps = rps;
 801
 802    return;
 803 }
 804
 805 static void vid_dec_h265_Decode(vid_dec_PrivateType *priv,
 806                                 struct vl_vlc *vlc,
 807                                 unsigned min_bits_left)
 808 {
 809    unsigned nal_unit_type;
 810    unsigned nuh_layer_id;
 811    unsigned nuh_temporal_id_plus1;
 812
 813    if (!vl_vlc_search_byte(vlc, vl_vlc_bits_left(vlc) - min_bits_left, 0x00))
 814       return;
 815
 816    if (vl_vlc_peekbits(vlc, 24) != 0x000001) {
 817       vl_vlc_eatbits(vlc, 8);
 818       return;
 819    }
 820
 821    if (priv->slice) {
 822       unsigned bytes = priv->bytes_left - (vl_vlc_bits_left(vlc) / 8);
 823
 824       priv->codec->decode_bitstream(priv->codec, priv->target,
 825                                     &priv->picture.base, 1,
 826                                     &priv->slice, &bytes);
 827       priv->slice = NULL;
 828    }
 829
 830    vl_vlc_eatbits(vlc, 24);
 831
 832    /* forbidden_zero_bit */
 833    vl_vlc_eatbits(vlc, 1);
 834
 835    if (vl_vlc_valid_bits(vlc) < 15)
 836       vl_vlc_fillbits(vlc);
 837
 838    nal_unit_type = vl_vlc_get_uimsbf(vlc, 6);
 839
 840    /* nuh_layer_id */
 841    nuh_layer_id = vl_vlc_get_uimsbf(vlc, 6);
 842
 843    /* nuh_temporal_id_plus1 */
 844    nuh_temporal_id_plus1 = vl_vlc_get_uimsbf(vlc, 3);
 845    priv->codec_data.h265.temporal_id = nuh_temporal_id_plus1 - 1;
 846
 847    if (!is_slice_picture(nal_unit_type))
 848       vid_dec_h265_EndFrame(priv);
 849
 850    if (nal_unit_type == NAL_UNIT_TYPE_SPS) {
 851       struct vl_rbsp rbsp;
 852
 853       vl_rbsp_init(&rbsp, vlc, ~0);
 854       seq_parameter_set(priv, &rbsp);
 855
 856    } else if (nal_unit_type == NAL_UNIT_TYPE_PPS) {
 857       struct vl_rbsp rbsp;
 858
 859       vl_rbsp_init(&rbsp, vlc, ~0);
 860       picture_parameter_set(priv, &rbsp);
 861
 862    } else if (is_slice_picture(nal_unit_type)) {
 863       unsigned bits = vl_vlc_valid_bits(vlc);
 864       unsigned bytes = bits / 8 + 5;
 865       struct vl_rbsp rbsp;
 866       uint8_t buf[9];
 867       const void *ptr = buf;
 868       unsigned i;
 869
 870       buf[0] = 0x0;
 871       buf[1] = 0x0;
 872       buf[2] = 0x1;
 873       buf[3] = nal_unit_type << 1 | nuh_layer_id >> 5;
 874       buf[4] = nuh_layer_id << 3 | nuh_temporal_id_plus1;
 875       for (i = 5; i < bytes; ++i)
 876          buf[i] = vl_vlc_peekbits(vlc, bits) >> ((bytes - i - 1) * 8);
 877
 878       priv->bytes_left = (vl_vlc_bits_left(vlc) - bits) / 8;
 879       priv->slice = vlc->data;
 880
 881       vl_rbsp_init(&rbsp, vlc, 128);
 882       slice_header(priv, &rbsp, nal_unit_type);
 883
 884       vid_dec_h265_BeginFrame(priv);
 885
 886       priv->codec->decode_bitstream(priv->codec, priv->target,
 887                                     &priv->picture.base, 1,
 888                                     &ptr, &bytes);
 889    }
 890
 891    /* resync to byte boundary */
 892    vl_vlc_eatbits(vlc, vl_vlc_valid_bits(vlc) % 8);
 893 }
 894
 895 void vid_dec_h265_Init(vid_dec_PrivateType *priv)
 896 {
 897    priv->picture.base.profile = PIPE_VIDEO_PROFILE_HEVC_MAIN;
 898
 899    LIST_INITHEAD(&priv->codec_data.h265.dpb_list);
 900    priv->codec_data.h265.ref_pic_set_list = (struct ref_pic_set *)
 901       CALLOC(MAX_NUM_REF_PICS, sizeof(struct ref_pic_set));
 902
 903    priv->Decode = vid_dec_h265_Decode;
 904    priv->EndFrame = vid_dec_h265_EndFrame;
 905    priv->Flush = vid_dec_h265_Flush;
 906    priv->first_buf_in_frame = true;
 907 }