libavcodec/vaapi_encode_h264.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <va/va.h>
  20 #include <va/va_enc_h264.h>
  21
  22 #include "libavutil/avassert.h"
  23 #include "libavutil/internal.h"
  24 #include "libavutil/opt.h"
  25 #include "libavutil/pixfmt.h"
  26
  27 #include "avcodec.h"
  28 #include "h264.h"
  29 #include "h264_sei.h"
  30 #include "internal.h"
  31 #include "vaapi_encode.h"
  32 #include "vaapi_encode_h26x.h"
  33
  34 enum {
  35     SLICE_TYPE_P  = 0,
  36     SLICE_TYPE_B  = 1,
  37     SLICE_TYPE_I  = 2,
  38     SLICE_TYPE_SP = 3,
  39     SLICE_TYPE_SI = 4,
  40 };
  41
  42 // This structure contains all possibly-useful per-sequence syntax elements
  43 // which are not already contained in the various VAAPI structures.
  44 typedef struct VAAPIEncodeH264MiscSequenceParams {
  45     unsigned int profile_idc;
  46     char constraint_set0_flag;
  47     char constraint_set1_flag;
  48     char constraint_set2_flag;
  49     char constraint_set3_flag;
  50     char constraint_set4_flag;
  51     char constraint_set5_flag;
  52
  53     char separate_colour_plane_flag;
  54     char qpprime_y_zero_transform_bypass_flag;
  55
  56     char gaps_in_frame_num_allowed_flag;
  57     char delta_pic_order_always_zero_flag;
  58     char bottom_field_pic_order_in_frame_present_flag;
  59
  60     unsigned int num_slice_groups_minus1;
  61     unsigned int slice_group_map_type;
  62
  63     int pic_init_qs_minus26;
  64
  65     char overscan_info_present_flag;
  66     char overscan_appropriate_flag;
  67
  68     char video_signal_type_present_flag;
  69     unsigned int video_format;
  70     char video_full_range_flag;
  71     char colour_description_present_flag;
  72     unsigned int colour_primaries;
  73     unsigned int transfer_characteristics;
  74     unsigned int matrix_coefficients;
  75
  76     char chroma_loc_info_present_flag;
  77     unsigned int chroma_sample_loc_type_top_field;
  78     unsigned int chroma_sample_loc_type_bottom_field;
  79
  80     // Some timing elements are in VAEncSequenceParameterBufferH264.
  81     char fixed_frame_rate_flag;
  82
  83     char nal_hrd_parameters_present_flag;
  84     char vcl_hrd_parameters_present_flag;
  85     char low_delay_hrd_flag;
  86     char pic_struct_present_flag;
  87
  88     char motion_vectors_over_pic_boundaries_flag;
  89     unsigned int max_bytes_per_pic_denom;
  90     unsigned int max_bits_per_mb_denom;
  91     unsigned int max_num_reorder_frames;
  92     unsigned int max_dec_pic_buffering;
  93
  94     unsigned int cpb_cnt_minus1;
  95     unsigned int bit_rate_scale;
  96     unsigned int cpb_size_scale;
  97     unsigned int bit_rate_value_minus1[32];
  98     unsigned int cpb_size_value_minus1[32];
  99     char cbr_flag[32];
 100     unsigned int initial_cpb_removal_delay_length_minus1;
 101     unsigned int cpb_removal_delay_length_minus1;
 102     unsigned int dpb_output_delay_length_minus1;
 103     unsigned int time_offset_length;
 104
 105     unsigned int initial_cpb_removal_delay;
 106     unsigned int initial_cpb_removal_delay_offset;
 107
 108     unsigned int pic_struct;
 109 } VAAPIEncodeH264MiscSequenceParams;
 110
 111 // This structure contains all possibly-useful per-slice syntax elements
 112 // which are not already contained in the various VAAPI structures.
 113 typedef struct VAAPIEncodeH264MiscSliceParams {
 114     unsigned int nal_unit_type;
 115     unsigned int nal_ref_idc;
 116
 117     unsigned int colour_plane_id;
 118     char field_pic_flag;
 119     char bottom_field_flag;
 120
 121     unsigned int redundant_pic_cnt;
 122
 123     char sp_for_switch_flag;
 124     int slice_qs_delta;
 125
 126     char ref_pic_list_modification_flag_l0;
 127     char ref_pic_list_modification_flag_l1;
 128
 129     char no_output_of_prior_pics_flag;
 130     char long_term_reference_flag;
 131     char adaptive_ref_pic_marking_mode_flag;
 132 } VAAPIEncodeH264MiscSliceParams;
 133
 134 typedef struct VAAPIEncodeH264Slice {
 135     VAAPIEncodeH264MiscSliceParams misc_slice_params;
 136 } VAAPIEncodeH264Slice;
 137
 138 typedef struct VAAPIEncodeH264Context {
 139     VAAPIEncodeH264MiscSequenceParams misc_sequence_params;
 140
 141     int mb_width;
 142     int mb_height;
 143
 144     int fixed_qp_idr;
 145     int fixed_qp_p;
 146     int fixed_qp_b;
 147
 148     int next_frame_num;
 149     int64_t last_idr_frame;
 150     int64_t idr_pic_count;
 151
 152     int cpb_delay;
 153     int dpb_delay;
 154
 155     // Rate control configuration.
 156     int send_timing_sei;
 157
 158 #if VA_CHECK_VERSION(0, 36, 0)
 159     // Speed-quality tradeoff setting.
 160     struct {
 161         VAEncMiscParameterBuffer misc;
 162         VAEncMiscParameterBufferQualityLevel quality;
 163     } quality_params;
 164 #endif
 165 } VAAPIEncodeH264Context;
 166
 167 typedef struct VAAPIEncodeH264Options {
 168     int qp;
 169     int quality;
 170     int low_power;
 171 } VAAPIEncodeH264Options;
 172
 173
 174 #define vseq_var(name)     vseq->name, name
 175 #define vseq_field(name)   vseq->seq_fields.bits.name, name
 176 #define vvui_field(name)   vseq->vui_fields.bits.name, name
 177 #define vpic_var(name)     vpic->name, name
 178 #define vpic_field(name)   vpic->pic_fields.bits.name, name
 179 #define vslice_var(name)   vslice->name, name
 180 #define vslice_field(name) vslice->slice_fields.bits.name, name
 181 #define mseq_var(name)     mseq->name, name
 182 #define mslice_var(name)   mslice->name, name
 183
 184 static void vaapi_encode_h264_write_nal_header(PutBitContext *pbc,
 185                                                int nal_unit_type, int nal_ref_idc)
 186 {
 187     u(1, 0, forbidden_zero_bit);
 188     u(2, nal_ref_idc, nal_ref_idc);
 189     u(5, nal_unit_type, nal_unit_type);
 190 }
 191
 192 static void vaapi_encode_h264_write_trailing_rbsp(PutBitContext *pbc)
 193 {
 194     u(1, 1, rbsp_stop_one_bit);
 195     while (put_bits_count(pbc) & 7)
 196         u(1, 0, rbsp_alignment_zero_bit);
 197 }
 198
 199 static void vaapi_encode_h264_write_vui(PutBitContext *pbc,
 200                                         VAAPIEncodeContext *ctx)
 201 {
 202     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 203     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 204     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 205     int i;
 206
 207     u(1, vvui_field(aspect_ratio_info_present_flag));
 208     if (vseq->vui_fields.bits.aspect_ratio_info_present_flag) {
 209         u(8, vseq_var(aspect_ratio_idc));
 210         if (vseq->aspect_ratio_idc == 255) {
 211             u(16, vseq_var(sar_width));
 212             u(16, vseq_var(sar_height));
 213         }
 214     }
 215
 216     u(1, mseq_var(overscan_info_present_flag));
 217     if (mseq->overscan_info_present_flag)
 218         u(1, mseq_var(overscan_appropriate_flag));
 219
 220     u(1, mseq_var(video_signal_type_present_flag));
 221     if (mseq->video_signal_type_present_flag) {
 222         u(3, mseq_var(video_format));
 223         u(1, mseq_var(video_full_range_flag));
 224         u(1, mseq_var(colour_description_present_flag));
 225         if (mseq->colour_description_present_flag) {
 226             u(8, mseq_var(colour_primaries));
 227             u(8, mseq_var(transfer_characteristics));
 228             u(8, mseq_var(matrix_coefficients));
 229         }
 230     }
 231
 232     u(1, mseq_var(chroma_loc_info_present_flag));
 233     if (mseq->chroma_loc_info_present_flag) {
 234         ue(mseq_var(chroma_sample_loc_type_top_field));
 235         ue(mseq_var(chroma_sample_loc_type_bottom_field));
 236     }
 237
 238     u(1, vvui_field(timing_info_present_flag));
 239     if (vseq->vui_fields.bits.timing_info_present_flag) {
 240         u(32, vseq_var(num_units_in_tick));
 241         u(32, vseq_var(time_scale));
 242         u(1, mseq_var(fixed_frame_rate_flag));
 243     }
 244
 245     u(1, mseq_var(nal_hrd_parameters_present_flag));
 246     if (mseq->nal_hrd_parameters_present_flag) {
 247         ue(mseq_var(cpb_cnt_minus1));
 248         u(4, mseq_var(bit_rate_scale));
 249         u(4, mseq_var(cpb_size_scale));
 250         for (i = 0; i <= mseq->cpb_cnt_minus1; i++) {
 251             ue(mseq_var(bit_rate_value_minus1[i]));
 252             ue(mseq_var(cpb_size_value_minus1[i]));
 253             u(1, mseq_var(cbr_flag[i]));
 254         }
 255         u(5, mseq_var(initial_cpb_removal_delay_length_minus1));
 256         u(5, mseq_var(cpb_removal_delay_length_minus1));
 257         u(5, mseq_var(dpb_output_delay_length_minus1));
 258         u(5, mseq_var(time_offset_length));
 259     }
 260     u(1, mseq_var(vcl_hrd_parameters_present_flag));
 261     if (mseq->vcl_hrd_parameters_present_flag) {
 262         av_assert0(0 && "vcl hrd parameters not supported");
 263     }
 264
 265     if (mseq->nal_hrd_parameters_present_flag ||
 266         mseq->vcl_hrd_parameters_present_flag)
 267         u(1, mseq_var(low_delay_hrd_flag));
 268     u(1, mseq_var(pic_struct_present_flag));
 269
 270     u(1, vvui_field(bitstream_restriction_flag));
 271     if (vseq->vui_fields.bits.bitstream_restriction_flag) {
 272         u(1, mseq_var(motion_vectors_over_pic_boundaries_flag));
 273         ue(mseq_var(max_bytes_per_pic_denom));
 274         ue(mseq_var(max_bits_per_mb_denom));
 275         ue(vvui_field(log2_max_mv_length_horizontal));
 276         ue(vvui_field(log2_max_mv_length_vertical));
 277         ue(mseq_var(max_num_reorder_frames));
 278         ue(mseq_var(max_dec_pic_buffering));
 279     }
 280 }
 281
 282 static void vaapi_encode_h264_write_sps(PutBitContext *pbc,
 283                                         VAAPIEncodeContext *ctx)
 284 {
 285     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 286     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 287     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 288     int i;
 289
 290     vaapi_encode_h264_write_nal_header(pbc, H264_NAL_SPS, 3);
 291
 292     u(8, mseq_var(profile_idc));
 293     u(1, mseq_var(constraint_set0_flag));
 294     u(1, mseq_var(constraint_set1_flag));
 295     u(1, mseq_var(constraint_set2_flag));
 296     u(1, mseq_var(constraint_set3_flag));
 297     u(1, mseq_var(constraint_set4_flag));
 298     u(1, mseq_var(constraint_set5_flag));
 299     u(2, 0, reserved_zero_2bits);
 300
 301     u(8, vseq_var(level_idc));
 302
 303     ue(vseq_var(seq_parameter_set_id));
 304
 305     if (mseq->profile_idc == 100 || mseq->profile_idc == 110 ||
 306         mseq->profile_idc == 122 || mseq->profile_idc == 244 ||
 307         mseq->profile_idc ==  44 || mseq->profile_idc ==  83 ||
 308         mseq->profile_idc ==  86 || mseq->profile_idc == 118 ||
 309         mseq->profile_idc == 128 || mseq->profile_idc == 138) {
 310         ue(vseq_field(chroma_format_idc));
 311
 312         if (vseq->seq_fields.bits.chroma_format_idc == 3)
 313             u(1, mseq_var(separate_colour_plane_flag));
 314
 315         ue(vseq_var(bit_depth_luma_minus8));
 316         ue(vseq_var(bit_depth_chroma_minus8));
 317
 318         u(1, mseq_var(qpprime_y_zero_transform_bypass_flag));
 319
 320         u(1, vseq_field(seq_scaling_matrix_present_flag));
 321         if (vseq->seq_fields.bits.seq_scaling_matrix_present_flag) {
 322             av_assert0(0 && "scaling matrices not supported");
 323         }
 324     }
 325
 326     ue(vseq_field(log2_max_frame_num_minus4));
 327     ue(vseq_field(pic_order_cnt_type));
 328
 329     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 330         ue(vseq_field(log2_max_pic_order_cnt_lsb_minus4));
 331     } else if (vseq->seq_fields.bits.pic_order_cnt_type == 1) {
 332         u(1, mseq_var(delta_pic_order_always_zero_flag));
 333         se(vseq_var(offset_for_non_ref_pic));
 334         se(vseq_var(offset_for_top_to_bottom_field));
 335         ue(vseq_var(num_ref_frames_in_pic_order_cnt_cycle));
 336
 337         for (i = 0; i < vseq->num_ref_frames_in_pic_order_cnt_cycle; i++)
 338             se(vseq_var(offset_for_ref_frame[i]));
 339     }
 340
 341     ue(vseq_var(max_num_ref_frames));
 342     u(1, mseq_var(gaps_in_frame_num_allowed_flag));
 343
 344     ue(vseq->picture_width_in_mbs  - 1, pic_width_in_mbs_minus1);
 345     ue(vseq->picture_height_in_mbs - 1, pic_height_in_mbs_minus1);
 346
 347     u(1, vseq_field(frame_mbs_only_flag));
 348     if (!vseq->seq_fields.bits.frame_mbs_only_flag)
 349         u(1, vseq_field(mb_adaptive_frame_field_flag));
 350
 351     u(1, vseq_field(direct_8x8_inference_flag));
 352
 353     u(1, vseq_var(frame_cropping_flag));
 354     if (vseq->frame_cropping_flag) {
 355         ue(vseq_var(frame_crop_left_offset));
 356         ue(vseq_var(frame_crop_right_offset));
 357         ue(vseq_var(frame_crop_top_offset));
 358         ue(vseq_var(frame_crop_bottom_offset));
 359     }
 360
 361     u(1, vseq_var(vui_parameters_present_flag));
 362     if (vseq->vui_parameters_present_flag)
 363         vaapi_encode_h264_write_vui(pbc, ctx);
 364
 365     vaapi_encode_h264_write_trailing_rbsp(pbc);
 366 }
 367
 368 static void vaapi_encode_h264_write_pps(PutBitContext *pbc,
 369                                         VAAPIEncodeContext *ctx)
 370 {
 371     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 372     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 373     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 374
 375     vaapi_encode_h264_write_nal_header(pbc, H264_NAL_PPS, 3);
 376
 377     ue(vpic_var(pic_parameter_set_id));
 378     ue(vpic_var(seq_parameter_set_id));
 379
 380     u(1, vpic_field(entropy_coding_mode_flag));
 381     u(1, mseq_var(bottom_field_pic_order_in_frame_present_flag));
 382
 383     ue(mseq_var(num_slice_groups_minus1));
 384     if (mseq->num_slice_groups_minus1 > 0) {
 385         ue(mseq_var(slice_group_map_type));
 386         av_assert0(0 && "slice groups not supported");
 387     }
 388
 389     ue(vpic_var(num_ref_idx_l0_active_minus1));
 390     ue(vpic_var(num_ref_idx_l1_active_minus1));
 391
 392     u(1, vpic_field(weighted_pred_flag));
 393     u(2, vpic_field(weighted_bipred_idc));
 394
 395     se(vpic->pic_init_qp - 26, pic_init_qp_minus26);
 396     se(mseq_var(pic_init_qs_minus26));
 397     se(vpic_var(chroma_qp_index_offset));
 398
 399     u(1, vpic_field(deblocking_filter_control_present_flag));
 400     u(1, vpic_field(constrained_intra_pred_flag));
 401     u(1, vpic_field(redundant_pic_cnt_present_flag));
 402     u(1, vpic_field(transform_8x8_mode_flag));
 403
 404     u(1, vpic_field(pic_scaling_matrix_present_flag));
 405     if (vpic->pic_fields.bits.pic_scaling_matrix_present_flag) {
 406         av_assert0(0 && "scaling matrices not supported");
 407     }
 408
 409     se(vpic_var(second_chroma_qp_index_offset));
 410
 411     vaapi_encode_h264_write_trailing_rbsp(pbc);
 412 }
 413
 414 static void vaapi_encode_h264_write_slice_header2(PutBitContext *pbc,
 415                                                   VAAPIEncodeContext *ctx,
 416                                                   VAAPIEncodePicture *pic,
 417                                                   VAAPIEncodeSlice *slice)
 418 {
 419     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 420     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 421     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
 422     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 423     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 424     VAAPIEncodeH264Slice            *pslice = slice->priv_data;
 425     VAAPIEncodeH264MiscSliceParams  *mslice = &pslice->misc_slice_params;
 426
 427     vaapi_encode_h264_write_nal_header(pbc, mslice->nal_unit_type,
 428                                        mslice->nal_ref_idc);
 429
 430     ue(vslice->macroblock_address, first_mb_in_slice);
 431     ue(vslice_var(slice_type));
 432     ue(vpic_var(pic_parameter_set_id));
 433
 434     if (mseq->separate_colour_plane_flag) {
 435         u(2, mslice_var(colour_plane_id));
 436     }
 437
 438     u(4 + vseq->seq_fields.bits.log2_max_frame_num_minus4,
 439       (vpic->frame_num &
 440        ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1)),
 441       frame_num);
 442
 443     if (!vseq->seq_fields.bits.frame_mbs_only_flag) {
 444         u(1, mslice_var(field_pic_flag));
 445         if (mslice->field_pic_flag)
 446             u(1, mslice_var(bottom_field_flag));
 447     }
 448
 449     if (vpic->pic_fields.bits.idr_pic_flag) {
 450         ue(vslice_var(idr_pic_id));
 451     }
 452
 453     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 454         u(4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4,
 455           vslice_var(pic_order_cnt_lsb));
 456         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 457             !mslice->field_pic_flag) {
 458             se(vslice_var(delta_pic_order_cnt_bottom));
 459         }
 460     }
 461
 462     if (vseq->seq_fields.bits.pic_order_cnt_type == 1 &&
 463         !vseq->seq_fields.bits.delta_pic_order_always_zero_flag) {
 464         se(vslice_var(delta_pic_order_cnt[0]));
 465         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 466             !mslice->field_pic_flag) {
 467             se(vslice_var(delta_pic_order_cnt[1]));
 468         }
 469     }
 470
 471     if (vpic->pic_fields.bits.redundant_pic_cnt_present_flag) {
 472         ue(mslice_var(redundant_pic_cnt));
 473     }
 474
 475     if (vslice->slice_type == SLICE_TYPE_B) {
 476         u(1, vslice_var(direct_spatial_mv_pred_flag));
 477     }
 478
 479     if (vslice->slice_type == SLICE_TYPE_P ||
 480         vslice->slice_type == SLICE_TYPE_SP ||
 481         vslice->slice_type == SLICE_TYPE_B) {
 482         u(1, vslice_var(num_ref_idx_active_override_flag));
 483         if (vslice->num_ref_idx_active_override_flag) {
 484             ue(vslice_var(num_ref_idx_l0_active_minus1));
 485             if (vslice->slice_type == SLICE_TYPE_B)
 486                 ue(vslice_var(num_ref_idx_l1_active_minus1));
 487         }
 488     }
 489
 490     if (mslice->nal_unit_type == 20 || mslice->nal_unit_type == 21) {
 491         av_assert0(0 && "no MVC support");
 492     } else {
 493         if (vslice->slice_type % 5 != 2 && vslice->slice_type % 5 != 4) {
 494             u(1, mslice_var(ref_pic_list_modification_flag_l0));
 495             if (mslice->ref_pic_list_modification_flag_l0) {
 496                 av_assert0(0 && "ref pic list modification");
 497             }
 498         }
 499         if (vslice->slice_type % 5 == 1) {
 500             u(1, mslice_var(ref_pic_list_modification_flag_l1));
 501             if (mslice->ref_pic_list_modification_flag_l1) {
 502                 av_assert0(0 && "ref pic list modification");
 503             }
 504         }
 505     }
 506
 507     if ((vpic->pic_fields.bits.weighted_pred_flag &&
 508          (vslice->slice_type == SLICE_TYPE_P ||
 509           vslice->slice_type == SLICE_TYPE_SP)) ||
 510         (vpic->pic_fields.bits.weighted_bipred_idc == 1 &&
 511          vslice->slice_type == SLICE_TYPE_B)) {
 512         av_assert0(0 && "prediction weights not supported");
 513     }
 514
 515     av_assert0(mslice->nal_ref_idc > 0 ==
 516                vpic->pic_fields.bits.reference_pic_flag);
 517     if (mslice->nal_ref_idc != 0) {
 518         if (vpic->pic_fields.bits.idr_pic_flag) {
 519             u(1, mslice_var(no_output_of_prior_pics_flag));
 520             u(1, mslice_var(long_term_reference_flag));
 521         } else {
 522             u(1, mslice_var(adaptive_ref_pic_marking_mode_flag));
 523             if (mslice->adaptive_ref_pic_marking_mode_flag) {
 524                 av_assert0(0 && "MMCOs not supported");
 525             }
 526         }
 527     }
 528
 529     if (vpic->pic_fields.bits.entropy_coding_mode_flag &&
 530         vslice->slice_type != SLICE_TYPE_I &&
 531         vslice->slice_type != SLICE_TYPE_SI) {
 532         ue(vslice_var(cabac_init_idc));
 533     }
 534
 535     se(vslice_var(slice_qp_delta));
 536     if (vslice->slice_type == SLICE_TYPE_SP ||
 537         vslice->slice_type == SLICE_TYPE_SI) {
 538         if (vslice->slice_type == SLICE_TYPE_SP)
 539             u(1, mslice_var(sp_for_switch_flag));
 540         se(mslice_var(slice_qs_delta));
 541     }
 542
 543     if (vpic->pic_fields.bits.deblocking_filter_control_present_flag) {
 544         ue(vslice_var(disable_deblocking_filter_idc));
 545         if (vslice->disable_deblocking_filter_idc != 1) {
 546             se(vslice_var(slice_alpha_c0_offset_div2));
 547             se(vslice_var(slice_beta_offset_div2));
 548         }
 549     }
 550
 551     if (mseq->num_slice_groups_minus1 > 0 &&
 552         mseq->slice_group_map_type >= 3 && mseq->slice_group_map_type <= 5) {
 553         av_assert0(0 && "slice groups not supported");
 554     }
 555
 556     // No alignment - this need not be a byte boundary.
 557 }
 558
 559 static void vaapi_encode_h264_write_buffering_period(PutBitContext *pbc,
 560                                                      VAAPIEncodeContext *ctx,
 561                                                      VAAPIEncodePicture *pic)
 562 {
 563     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 564     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 565     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 566     int i;
 567
 568     ue(vpic_var(seq_parameter_set_id));
 569
 570     if (mseq->nal_hrd_parameters_present_flag) {
 571         for (i = 0; i <= mseq->cpb_cnt_minus1; i++) {
 572             u(mseq->initial_cpb_removal_delay_length_minus1 + 1,
 573               mseq_var(initial_cpb_removal_delay));
 574             u(mseq->initial_cpb_removal_delay_length_minus1 + 1,
 575               mseq_var(initial_cpb_removal_delay_offset));
 576         }
 577     }
 578     if (mseq->vcl_hrd_parameters_present_flag) {
 579         av_assert0(0 && "vcl hrd parameters not supported");
 580     }
 581 }
 582
 583 static void vaapi_encode_h264_write_pic_timing(PutBitContext *pbc,
 584                                                VAAPIEncodeContext *ctx,
 585                                                VAAPIEncodePicture *pic)
 586 {
 587     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 588     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 589     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 590     int i, num_clock_ts;
 591
 592     if (mseq->nal_hrd_parameters_present_flag ||
 593         mseq->vcl_hrd_parameters_present_flag) {
 594         u(mseq->cpb_removal_delay_length_minus1 + 1,
 595           2 * vseq->num_units_in_tick * priv->cpb_delay,
 596           cpb_removal_delay);
 597         u(mseq->dpb_output_delay_length_minus1 + 1,
 598           2 * vseq->num_units_in_tick * priv->dpb_delay,
 599           dpb_output_delay);
 600     }
 601     if (mseq->pic_struct_present_flag) {
 602         u(4, mseq_var(pic_struct));
 603         num_clock_ts = (mseq->pic_struct <= 2 ? 1 :
 604                         mseq->pic_struct <= 4 ? 2 :
 605                         mseq->pic_struct <= 8 ? 3 : 0);
 606         for (i = 0; i < num_clock_ts; i++) {
 607             u(1, 0, clock_timestamp_flag[i]);
 608             // No full timestamp information.
 609         }
 610     }
 611 }
 612
 613 static void vaapi_encode_h264_write_identifier(PutBitContext *pbc,
 614                                                VAAPIEncodeContext *ctx,
 615                                                VAAPIEncodePicture *pic)
 616 {
 617     const char *lavc   = LIBAVCODEC_IDENT;
 618     const char *vaapi  = VA_VERSION_S;
 619     const char *driver = vaQueryVendorString(ctx->hwctx->display);
 620     char tmp[256];
 621     int i;
 622
 623     // Random (version 4) ISO 11578 UUID.
 624     uint8_t uuid[16] = {
 625         0x59, 0x94, 0x8b, 0x28, 0x11, 0xec, 0x45, 0xaf,
 626         0x96, 0x75, 0x19, 0xd4, 0x1f, 0xea, 0xa9, 0x4d,
 627     };
 628
 629     for (i = 0; i < 16; i++)
 630         u(8, uuid[i], uuid_iso_iec_11578);
 631
 632     snprintf(tmp, sizeof(tmp), "%s / VAAPI %s / %s", lavc, vaapi, driver);
 633     for (i = 0; i < sizeof(tmp) && tmp[i]; i++)
 634         u(8, tmp[i], user_data_payload_byte);
 635 }
 636
 637 static void vaapi_encode_h264_write_sei(PutBitContext *pbc,
 638                                         VAAPIEncodeContext *ctx,
 639                                         VAAPIEncodePicture *pic)
 640 {
 641     VAAPIEncodeH264Context *priv = ctx->priv_data;
 642     PutBitContext payload_bits;
 643     char payload[256];
 644     int payload_type, payload_size, i;
 645     void (*write_payload)(PutBitContext *pbc,
 646                           VAAPIEncodeContext *ctx,
 647                           VAAPIEncodePicture *pic) = NULL;
 648
 649     vaapi_encode_h264_write_nal_header(pbc, H264_NAL_SEI, 0);
 650
 651     for (payload_type = 0; payload_type < 64; payload_type++) {
 652         switch (payload_type) {
 653         case SEI_TYPE_BUFFERING_PERIOD:
 654             if (!priv->send_timing_sei ||
 655                 pic->type != PICTURE_TYPE_IDR)
 656                 continue;
 657             write_payload = &vaapi_encode_h264_write_buffering_period;
 658             break;
 659         case SEI_TYPE_PIC_TIMING:
 660             if (!priv->send_timing_sei)
 661                 continue;
 662             write_payload = &vaapi_encode_h264_write_pic_timing;
 663             break;
 664         case SEI_TYPE_USER_DATA_UNREGISTERED:
 665             if (pic->encode_order != 0)
 666                 continue;
 667             write_payload = &vaapi_encode_h264_write_identifier;
 668             break;
 669         default:
 670             continue;
 671         }
 672
 673         init_put_bits(&payload_bits, payload, sizeof(payload));
 674         write_payload(&payload_bits, ctx, pic);
 675         if (put_bits_count(&payload_bits) & 7) {
 676             write_u(&payload_bits, 1, 1, bit_equal_to_one);
 677             while (put_bits_count(&payload_bits) & 7)
 678                 write_u(&payload_bits, 1, 0, bit_equal_to_zero);
 679         }
 680         payload_size = put_bits_count(&payload_bits) / 8;
 681         flush_put_bits(&payload_bits);
 682
 683         u(8, payload_type, last_payload_type_byte);
 684         u(8, payload_size, last_payload_size_byte);
 685         for (i = 0; i < payload_size; i++)
 686             u(8, payload[i] & 0xff, sei_payload);
 687     }
 688
 689     vaapi_encode_h264_write_trailing_rbsp(pbc);
 690 }
 691
 692 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 693                                                    char *data, size_t *data_len)
 694 {
 695     VAAPIEncodeContext *ctx = avctx->priv_data;
 696     PutBitContext pbc;
 697     char tmp[256];
 698     int err;
 699     size_t nal_len, bit_len, bit_pos, next_len;
 700
 701     bit_len = *data_len;
 702     bit_pos = 0;
 703
 704     init_put_bits(&pbc, tmp, sizeof(tmp));
 705     vaapi_encode_h264_write_sps(&pbc, ctx);
 706     nal_len = put_bits_count(&pbc);
 707     flush_put_bits(&pbc);
 708
 709     next_len = bit_len - bit_pos;
 710     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 711                                                        &next_len,
 712                                                        tmp, nal_len);
 713     if (err < 0)
 714         return err;
 715     bit_pos += next_len;
 716
 717     init_put_bits(&pbc, tmp, sizeof(tmp));
 718     vaapi_encode_h264_write_pps(&pbc, ctx);
 719     nal_len = put_bits_count(&pbc);
 720     flush_put_bits(&pbc);
 721
 722     next_len = bit_len - bit_pos;
 723     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 724                                                        &next_len,
 725                                                        tmp, nal_len);
 726     if (err < 0)
 727         return err;
 728     bit_pos += next_len;
 729
 730     *data_len = bit_pos;
 731     return 0;
 732 }
 733
 734 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 735                                                 VAAPIEncodePicture *pic,
 736                                                 VAAPIEncodeSlice *slice,
 737                                                 char *data, size_t *data_len)
 738 {
 739     VAAPIEncodeContext *ctx = avctx->priv_data;
 740     PutBitContext pbc;
 741     char tmp[256];
 742     size_t header_len;
 743
 744     init_put_bits(&pbc, tmp, sizeof(tmp));
 745     vaapi_encode_h264_write_slice_header2(&pbc, ctx, pic, slice);
 746     header_len = put_bits_count(&pbc);
 747     flush_put_bits(&pbc);
 748
 749     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
 750                                                         tmp, header_len);
 751 }
 752
 753 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 754                                                 VAAPIEncodePicture *pic,
 755                                                 int index, int *type,
 756                                                 char *data, size_t *data_len)
 757 {
 758     VAAPIEncodeContext *ctx = avctx->priv_data;
 759     PutBitContext pbc;
 760     char tmp[256];
 761     size_t header_len;
 762
 763     if (index == 0 && ctx->va_rc_mode == VA_RC_CBR) {
 764         *type = VAEncPackedHeaderH264_SEI;
 765
 766         init_put_bits(&pbc, tmp, sizeof(tmp));
 767         vaapi_encode_h264_write_sei(&pbc, ctx, pic);
 768         header_len = put_bits_count(&pbc);
 769         flush_put_bits(&pbc);
 770
 771         return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
 772                                                             tmp, header_len);
 773
 774     } else {
 775         return AVERROR_EOF;
 776     }
 777 }
 778
 779 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 780 {
 781     VAAPIEncodeContext                 *ctx = avctx->priv_data;
 782     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 783     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 784     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 785     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 786     int i;
 787
 788     {
 789         vseq->seq_parameter_set_id = 0;
 790
 791         vseq->level_idc = avctx->level;
 792
 793         vseq->max_num_ref_frames = 1 + (avctx->max_b_frames > 0);
 794
 795         vseq->picture_width_in_mbs  = priv->mb_width;
 796         vseq->picture_height_in_mbs = priv->mb_height;
 797
 798         vseq->seq_fields.bits.chroma_format_idc = 1;
 799         vseq->seq_fields.bits.frame_mbs_only_flag = 1;
 800         vseq->seq_fields.bits.direct_8x8_inference_flag = 1;
 801         vseq->seq_fields.bits.log2_max_frame_num_minus4 = 4;
 802         vseq->seq_fields.bits.pic_order_cnt_type = 0;
 803         vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 =
 804             av_clip(av_log2(avctx->max_b_frames + 1) - 2, 0, 12);
 805
 806         if (avctx->width  != ctx->surface_width ||
 807             avctx->height != ctx->surface_height) {
 808             vseq->frame_cropping_flag = 1;
 809
 810             vseq->frame_crop_left_offset   = 0;
 811             vseq->frame_crop_right_offset  =
 812                 (ctx->surface_width - avctx->width) / 2;
 813             vseq->frame_crop_top_offset    = 0;
 814             vseq->frame_crop_bottom_offset =
 815                 (ctx->surface_height - avctx->height) / 2;
 816         } else {
 817             vseq->frame_cropping_flag = 0;
 818         }
 819
 820         vseq->vui_parameters_present_flag = 1;
 821         if (avctx->sample_aspect_ratio.num != 0) {
 822             vseq->vui_fields.bits.aspect_ratio_info_present_flag = 1;
 823             // There is a large enum of these which we could support
 824             // individually rather than using the generic X/Y form?
 825             if (avctx->sample_aspect_ratio.num ==
 826                 avctx->sample_aspect_ratio.den) {
 827                 vseq->aspect_ratio_idc = 1;
 828             } else {
 829                 vseq->aspect_ratio_idc = 255; // Extended SAR.
 830                 vseq->sar_width  = avctx->sample_aspect_ratio.num;
 831                 vseq->sar_height = avctx->sample_aspect_ratio.den;
 832             }
 833         }
 834         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 835             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 836             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 837             mseq->video_signal_type_present_flag = 1;
 838             mseq->video_format             = 5; // Unspecified.
 839             mseq->video_full_range_flag    = 0;
 840             mseq->colour_description_present_flag = 1;
 841             // These enums are derived from the standard and hence
 842             // we can just use the values directly.
 843             mseq->colour_primaries         = avctx->color_primaries;
 844             mseq->transfer_characteristics = avctx->color_trc;
 845             mseq->matrix_coefficients      = avctx->colorspace;
 846         }
 847
 848         vseq->vui_fields.bits.bitstream_restriction_flag = 1;
 849         mseq->motion_vectors_over_pic_boundaries_flag = 1;
 850         mseq->max_bytes_per_pic_denom = 0;
 851         mseq->max_bits_per_mb_denom   = 0;
 852         vseq->vui_fields.bits.log2_max_mv_length_horizontal = 16;
 853         vseq->vui_fields.bits.log2_max_mv_length_vertical   = 16;
 854
 855         mseq->max_num_reorder_frames = (avctx->max_b_frames > 0);
 856         mseq->max_dec_pic_buffering  = vseq->max_num_ref_frames;
 857
 858         vseq->bits_per_second = avctx->bit_rate;
 859
 860         vseq->vui_fields.bits.timing_info_present_flag = 1;
 861         if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 862             vseq->num_units_in_tick = avctx->framerate.den;
 863             vseq->time_scale        = 2 * avctx->framerate.num;
 864             mseq->fixed_frame_rate_flag = 1;
 865         } else {
 866             vseq->num_units_in_tick = avctx->time_base.num;
 867             vseq->time_scale        = 2 * avctx->time_base.den;
 868             mseq->fixed_frame_rate_flag = 0;
 869         }
 870
 871         if (ctx->va_rc_mode == VA_RC_CBR) {
 872             priv->send_timing_sei = 1;
 873             mseq->nal_hrd_parameters_present_flag = 1;
 874
 875             mseq->cpb_cnt_minus1 = 0;
 876
 877             // Try to scale these to a sensible range so that the
 878             // golomb encode of the value is not overlong.
 879             mseq->bit_rate_scale =
 880                 av_clip_uintp2(av_log2(avctx->bit_rate) - 15 - 6, 4);
 881             mseq->bit_rate_value_minus1[0] =
 882                 (avctx->bit_rate >> mseq->bit_rate_scale + 6) - 1;
 883
 884             mseq->cpb_size_scale =
 885                 av_clip_uintp2(av_log2(ctx->hrd_params.hrd.buffer_size) - 15 - 4, 4);
 886             mseq->cpb_size_value_minus1[0] =
 887                 (ctx->hrd_params.hrd.buffer_size >> mseq->cpb_size_scale + 4) - 1;
 888
 889             // CBR mode isn't actually available here, despite naming.
 890             mseq->cbr_flag[0] = 0;
 891
 892             mseq->initial_cpb_removal_delay_length_minus1 = 23;
 893             mseq->cpb_removal_delay_length_minus1         = 23;
 894             mseq->dpb_output_delay_length_minus1          = 7;
 895             mseq->time_offset_length = 0;
 896
 897             // This calculation can easily overflow 32 bits.
 898             mseq->initial_cpb_removal_delay = 90000 *
 899                 (uint64_t)ctx->hrd_params.hrd.initial_buffer_fullness /
 900                 ctx->hrd_params.hrd.buffer_size;
 901
 902             mseq->initial_cpb_removal_delay_offset = 0;
 903         } else {
 904             priv->send_timing_sei = 0;
 905             mseq->nal_hrd_parameters_present_flag = 0;
 906         }
 907
 908         vseq->intra_period     = ctx->p_per_i * (ctx->b_per_p + 1);
 909         vseq->intra_idr_period = vseq->intra_period;
 910         vseq->ip_period        = ctx->b_per_p + 1;
 911     }
 912
 913     {
 914         vpic->CurrPic.picture_id = VA_INVALID_ID;
 915         vpic->CurrPic.flags      = VA_PICTURE_H264_INVALID;
 916
 917         for (i = 0; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 918             vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 919             vpic->ReferenceFrames[i].flags      = VA_PICTURE_H264_INVALID;
 920         }
 921
 922         vpic->coded_buf = VA_INVALID_ID;
 923
 924         vpic->pic_parameter_set_id = 0;
 925         vpic->seq_parameter_set_id = 0;
 926
 927         vpic->num_ref_idx_l0_active_minus1 = 0;
 928         vpic->num_ref_idx_l1_active_minus1 = 0;
 929
 930         vpic->pic_fields.bits.entropy_coding_mode_flag =
 931             ((avctx->profile & 0xff) != 66);
 932         vpic->pic_fields.bits.weighted_pred_flag = 0;
 933         vpic->pic_fields.bits.weighted_bipred_idc = 0;
 934         vpic->pic_fields.bits.transform_8x8_mode_flag =
 935             ((avctx->profile & 0xff) >= 100);
 936
 937         vpic->pic_init_qp = priv->fixed_qp_idr;
 938     }
 939
 940     {
 941         mseq->profile_idc = avctx->profile & 0xff;
 942
 943         if (avctx->profile & FF_PROFILE_H264_CONSTRAINED)
 944             mseq->constraint_set1_flag = 1;
 945         if (avctx->profile & FF_PROFILE_H264_INTRA)
 946             mseq->constraint_set3_flag = 1;
 947     }
 948
 949     return 0;
 950 }
 951
 952 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 953                                                  VAAPIEncodePicture *pic)
 954 {
 955     VAAPIEncodeContext                *ctx = avctx->priv_data;
 956     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 957     VAEncPictureParameterBufferH264  *vpic = pic->codec_picture_params;
 958     VAAPIEncodeH264Context           *priv = ctx->priv_data;
 959     int i;
 960
 961     if (pic->type == PICTURE_TYPE_IDR) {
 962         av_assert0(pic->display_order == pic->encode_order);
 963         vpic->frame_num = 0;
 964         priv->next_frame_num = 1;
 965         priv->cpb_delay = 0;
 966         priv->last_idr_frame = pic->display_order;
 967     } else {
 968         vpic->frame_num = priv->next_frame_num;
 969         if (pic->type != PICTURE_TYPE_B) {
 970             // nal_ref_idc != 0
 971             ++priv->next_frame_num;
 972         }
 973         ++priv->cpb_delay;
 974     }
 975     priv->dpb_delay = pic->display_order - pic->encode_order + 1;
 976
 977     vpic->frame_num = vpic->frame_num &
 978         ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1);
 979
 980     vpic->CurrPic.picture_id          = pic->recon_surface;
 981     vpic->CurrPic.frame_idx           = vpic->frame_num;
 982     vpic->CurrPic.flags               = 0;
 983     vpic->CurrPic.TopFieldOrderCnt    = pic->display_order - priv->last_idr_frame;
 984     vpic->CurrPic.BottomFieldOrderCnt = pic->display_order - priv->last_idr_frame;
 985
 986     for (i = 0; i < pic->nb_refs; i++) {
 987         VAAPIEncodePicture *ref = pic->refs[i];
 988         av_assert0(ref && ref->encode_order < pic->encode_order);
 989         vpic->ReferenceFrames[i].picture_id = ref->recon_surface;
 990         vpic->ReferenceFrames[i].frame_idx  = ref->encode_order;
 991         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
 992         vpic->ReferenceFrames[i].TopFieldOrderCnt    = ref->display_order - priv->last_idr_frame;
 993         vpic->ReferenceFrames[i].BottomFieldOrderCnt = ref->display_order - priv->last_idr_frame;
 994     }
 995     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 996         vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 997         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_INVALID;
 998     }
 999
1000     vpic->coded_buf = pic->output_buffer;
1001
1002     vpic->pic_fields.bits.idr_pic_flag = (pic->type == PICTURE_TYPE_IDR);
1003     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
1004
1005     pic->nb_slices = 1;
1006
1007     return 0;
1008 }
1009
1010 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
1011                                                VAAPIEncodePicture *pic,
1012                                                VAAPIEncodeSlice *slice)
1013 {
1014     VAAPIEncodeContext                 *ctx = avctx->priv_data;
1015     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
1016     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
1017     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
1018     VAAPIEncodeH264Context            *priv = ctx->priv_data;
1019     VAAPIEncodeH264Slice            *pslice;
1020     VAAPIEncodeH264MiscSliceParams  *mslice;
1021     int i;
1022
1023     slice->priv_data = av_mallocz(sizeof(*pslice));
1024     if (!slice->priv_data)
1025         return AVERROR(ENOMEM);
1026     pslice = slice->priv_data;
1027     mslice = &pslice->misc_slice_params;
1028
1029     if (pic->type == PICTURE_TYPE_IDR)
1030         mslice->nal_unit_type = H264_NAL_IDR_SLICE;
1031     else
1032         mslice->nal_unit_type = H264_NAL_SLICE;
1033
1034     switch (pic->type) {
1035     case PICTURE_TYPE_IDR:
1036         vslice->slice_type  = SLICE_TYPE_I;
1037         mslice->nal_ref_idc = 3;
1038         break;
1039     case PICTURE_TYPE_I:
1040         vslice->slice_type  = SLICE_TYPE_I;
1041         mslice->nal_ref_idc = 2;
1042         break;
1043     case PICTURE_TYPE_P:
1044         vslice->slice_type  = SLICE_TYPE_P;
1045         mslice->nal_ref_idc = 1;
1046         break;
1047     case PICTURE_TYPE_B:
1048         vslice->slice_type  = SLICE_TYPE_B;
1049         mslice->nal_ref_idc = 0;
1050         break;
1051     default:
1052         av_assert0(0 && "invalid picture type");
1053     }
1054
1055     // Only one slice per frame.
1056     vslice->macroblock_address = 0;
1057     vslice->num_macroblocks = priv->mb_width * priv->mb_height;
1058
1059     vslice->macroblock_info = VA_INVALID_ID;
1060
1061     vslice->pic_parameter_set_id = vpic->pic_parameter_set_id;
1062     vslice->idr_pic_id = priv->idr_pic_count++;
1063
1064     vslice->pic_order_cnt_lsb = (pic->display_order - priv->last_idr_frame) &
1065         ((1 << (4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4)) - 1);
1066
1067     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1068         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1069         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1070         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1071         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1072     }
1073
1074     av_assert0(pic->nb_refs <= 2);
1075     if (pic->nb_refs >= 1) {
1076         // Backward reference for P- or B-frame.
1077         av_assert0(pic->type == PICTURE_TYPE_P ||
1078                    pic->type == PICTURE_TYPE_B);
1079
1080         vslice->num_ref_idx_l0_active_minus1 = 0;
1081         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1082     }
1083     if (pic->nb_refs >= 2) {
1084         // Forward reference for B-frame.
1085         av_assert0(pic->type == PICTURE_TYPE_B);
1086
1087         vslice->num_ref_idx_l1_active_minus1 = 0;
1088         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1089     }
1090
1091     if (pic->type == PICTURE_TYPE_B)
1092         vslice->slice_qp_delta = priv->fixed_qp_b - vpic->pic_init_qp;
1093     else if (pic->type == PICTURE_TYPE_P)
1094         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;
1095     else
1096         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
1097
1098     vslice->direct_spatial_mv_pred_flag = 1;
1099
1100     return 0;
1101 }
1102
1103 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
1104 {
1105     VAAPIEncodeContext      *ctx = avctx->priv_data;
1106     VAAPIEncodeH264Context *priv = ctx->priv_data;
1107     VAAPIEncodeH264Options  *opt = ctx->codec_options;
1108
1109     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
1110     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
1111
1112     if (ctx->va_rc_mode == VA_RC_CQP) {
1113         priv->fixed_qp_p = opt->qp;
1114         if (avctx->i_quant_factor > 0.0)
1115             priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
1116                                         avctx->i_quant_offset) + 0.5);
1117         else
1118             priv->fixed_qp_idr = priv->fixed_qp_p;
1119         if (avctx->b_quant_factor > 0.0)
1120             priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
1121                                       avctx->b_quant_offset) + 0.5);
1122         else
1123             priv->fixed_qp_b = priv->fixed_qp_p;
1124
1125         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1126                "%d / %d / %d for IDR- / P- / B-frames.\n",
1127                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1128
1129     } else if (ctx->va_rc_mode == VA_RC_CBR ||
1130                ctx->va_rc_mode == VA_RC_VBR) {
1131         // These still need to be  set for pic_init_qp/slice_qp_delta.
1132         priv->fixed_qp_idr = 26;
1133         priv->fixed_qp_p   = 26;
1134         priv->fixed_qp_b   = 26;
1135
1136         av_log(avctx, AV_LOG_DEBUG, "Using %s-bitrate = %"PRId64" bps.\n",
1137                ctx->va_rc_mode == VA_RC_CBR ? "constant" : "variable",
1138                avctx->bit_rate);
1139
1140     } else {
1141         av_assert0(0 && "Invalid RC mode.");
1142     }
1143
1144     if (opt->quality > 0) {
1145 #if VA_CHECK_VERSION(0, 36, 0)
1146         priv->quality_params.misc.type =
1147             VAEncMiscParameterTypeQualityLevel;
1148         priv->quality_params.quality.quality_level = opt->quality;
1149
1150         ctx->global_params[ctx->nb_global_params] =
1151             &priv->quality_params.misc;
1152         ctx->global_params_size[ctx->nb_global_params++] =
1153             sizeof(priv->quality_params);
1154 #else
1155         av_log(avctx, AV_LOG_WARNING, "The encode quality option is not "
1156                "supported with this VAAPI version.\n");
1157 #endif
1158     }
1159
1160     return 0;
1161 }
1162
1163 static const VAAPIEncodeType vaapi_encode_type_h264 = {
1164     .priv_data_size        = sizeof(VAAPIEncodeH264Context),
1165
1166     .configure             = &vaapi_encode_h264_configure,
1167
1168     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1169     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1170
1171     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1172     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1173
1174     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1175     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1176
1177     .sequence_header_type  = VAEncPackedHeaderSequence,
1178     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1179
1180     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1181     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1182
1183     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1184 };
1185
1186 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1187 {
1188     VAAPIEncodeContext     *ctx = avctx->priv_data;
1189     VAAPIEncodeH264Options *opt =
1190         (VAAPIEncodeH264Options*)ctx->codec_options_data;
1191
1192     ctx->codec = &vaapi_encode_type_h264;
1193
1194     switch (avctx->profile) {
1195     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
1196         ctx->va_profile = VAProfileH264ConstrainedBaseline;
1197         if (avctx->max_b_frames != 0) {
1198             avctx->max_b_frames = 0;
1199             av_log(avctx, AV_LOG_WARNING, "H.264 constrained baseline profile "
1200                    "doesn't support encoding with B frames, disabling them.\n");
1201         }
1202         break;
1203     case FF_PROFILE_H264_BASELINE:
1204         ctx->va_profile = VAProfileH264Baseline;
1205         if (avctx->max_b_frames != 0) {
1206             avctx->max_b_frames = 0;
1207             av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile "
1208                    "doesn't support encoding with B frames, disabling them.\n");
1209         }
1210         break;
1211     case FF_PROFILE_H264_MAIN:
1212         ctx->va_profile = VAProfileH264Main;
1213         break;
1214     case FF_PROFILE_H264_EXTENDED:
1215         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1216                "is not supported.\n");
1217         return AVERROR_PATCHWELCOME;
1218     case FF_PROFILE_UNKNOWN:
1219     case FF_PROFILE_H264_HIGH:
1220         ctx->va_profile = VAProfileH264High;
1221         break;
1222     case FF_PROFILE_H264_HIGH_10:
1223     case FF_PROFILE_H264_HIGH_10_INTRA:
1224         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1225                "are not supported.\n");
1226         return AVERROR_PATCHWELCOME;
1227     case FF_PROFILE_H264_HIGH_422:
1228     case FF_PROFILE_H264_HIGH_422_INTRA:
1229     case FF_PROFILE_H264_HIGH_444:
1230     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1231     case FF_PROFILE_H264_HIGH_444_INTRA:
1232     case FF_PROFILE_H264_CAVLC_444:
1233         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1234                "are not supported.\n");
1235         return AVERROR_PATCHWELCOME;
1236     default:
1237         av_log(avctx, AV_LOG_ERROR, "Unknown H.264 profile %d.\n",
1238                avctx->profile);
1239         return AVERROR(EINVAL);
1240     }
1241     if (opt->low_power) {
1242 #if VA_CHECK_VERSION(0, 39, 2)
1243         ctx->va_entrypoint = VAEntrypointEncSliceLP;
1244 #else
1245         av_log(avctx, AV_LOG_ERROR, "Low-power encoding is not "
1246                "supported with this VAAPI version.\n");
1247         return AVERROR(EINVAL);
1248 #endif
1249     } else {
1250         ctx->va_entrypoint = VAEntrypointEncSlice;
1251     }
1252
1253     // Only 8-bit encode is supported.
1254     ctx->va_rt_format = VA_RT_FORMAT_YUV420;
1255
1256     if (avctx->bit_rate > 0) {
1257         if (avctx->rc_max_rate == avctx->bit_rate)
1258             ctx->va_rc_mode = VA_RC_CBR;
1259         else
1260             ctx->va_rc_mode = VA_RC_VBR;
1261     } else
1262         ctx->va_rc_mode = VA_RC_CQP;
1263
1264     ctx->va_packed_headers =
1265         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
1266         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
1267         VA_ENC_PACKED_HEADER_MISC;      // SEI.
1268
1269     ctx->surface_width  = FFALIGN(avctx->width,  16);
1270     ctx->surface_height = FFALIGN(avctx->height, 16);
1271
1272     return ff_vaapi_encode_init(avctx);
1273 }
1274
1275 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
1276                    offsetof(VAAPIEncodeH264Options, x))
1277 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1278 static const AVOption vaapi_encode_h264_options[] = {
1279     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1280       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
1281     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1282       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, FLAGS },
1283     { "low_power", "Use low-power encoding mode (experimental: only supported "
1284       "on some platforms, does not support all features)",
1285       OFFSET(low_power), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
1286     { NULL },
1287 };
1288
1289 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1290     { "profile",        "100" },
1291     { "level",          "51"  },
1292     { "b",              "0"   },
1293     { "bf",             "2"   },
1294     { "g",              "120" },
1295     { "i_qfactor",      "1"   },
1296     { "i_qoffset",      "0"   },
1297     { "b_qfactor",      "6/5" },
1298     { "b_qoffset",      "0"   },
1299     { "qmin",           "0"   },
1300     { NULL },
1301 };
1302
1303 static const AVClass vaapi_encode_h264_class = {
1304     .class_name = "h264_vaapi",
1305     .item_name  = av_default_item_name,
1306     .option     = vaapi_encode_h264_options,
1307     .version    = LIBAVUTIL_VERSION_INT,
1308 };
1309
1310 AVCodec ff_h264_vaapi_encoder = {
1311     .name           = "h264_vaapi",
1312     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1313     .type           = AVMEDIA_TYPE_VIDEO,
1314     .id             = AV_CODEC_ID_H264,
1315     .priv_data_size = (sizeof(VAAPIEncodeContext) +
1316                        sizeof(VAAPIEncodeH264Options)),
1317     .init           = &vaapi_encode_h264_init,
1318     .encode2        = &ff_vaapi_encode2,
1319     .close          = &ff_vaapi_encode_close,
1320     .priv_class     = &vaapi_encode_h264_class,
1321     .capabilities   = AV_CODEC_CAP_DELAY,
1322     .defaults       = vaapi_encode_h264_defaults,
1323     .pix_fmts = (const enum AVPixelFormat[]) {
1324         AV_PIX_FMT_VAAPI,
1325         AV_PIX_FMT_NONE,
1326     },
1327 };