libavcodec/vaapi_encode_h264.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav 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  * Libav 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 Libav; 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     char bitstream_restriction_flag;
  88
  89     unsigned int cpb_cnt_minus1;
  90     unsigned int bit_rate_scale;
  91     unsigned int cpb_size_scale;
  92     unsigned int bit_rate_value_minus1[32];
  93     unsigned int cpb_size_value_minus1[32];
  94     char cbr_flag[32];
  95     unsigned int initial_cpb_removal_delay_length_minus1;
  96     unsigned int cpb_removal_delay_length_minus1;
  97     unsigned int dpb_output_delay_length_minus1;
  98     unsigned int time_offset_length;
  99
 100     unsigned int initial_cpb_removal_delay;
 101     unsigned int initial_cpb_removal_delay_offset;
 102
 103     unsigned int pic_struct;
 104 } VAAPIEncodeH264MiscSequenceParams;
 105
 106 // This structure contains all possibly-useful per-slice syntax elements
 107 // which are not already contained in the various VAAPI structures.
 108 typedef struct VAAPIEncodeH264MiscSliceParams {
 109     unsigned int nal_unit_type;
 110     unsigned int nal_ref_idc;
 111
 112     unsigned int colour_plane_id;
 113     char field_pic_flag;
 114     char bottom_field_flag;
 115
 116     unsigned int redundant_pic_cnt;
 117
 118     char sp_for_switch_flag;
 119     int slice_qs_delta;
 120
 121     char ref_pic_list_modification_flag_l0;
 122     char ref_pic_list_modification_flag_l1;
 123
 124     char no_output_of_prior_pics_flag;
 125     char long_term_reference_flag;
 126     char adaptive_ref_pic_marking_mode_flag;
 127 } VAAPIEncodeH264MiscSliceParams;
 128
 129 typedef struct VAAPIEncodeH264Slice {
 130     VAAPIEncodeH264MiscSliceParams misc_slice_params;
 131 } VAAPIEncodeH264Slice;
 132
 133 typedef struct VAAPIEncodeH264Context {
 134     VAAPIEncodeH264MiscSequenceParams misc_sequence_params;
 135
 136     int mb_width;
 137     int mb_height;
 138
 139     int fixed_qp_idr;
 140     int fixed_qp_p;
 141     int fixed_qp_b;
 142
 143     int next_frame_num;
 144     int64_t idr_pic_count;
 145
 146     int cpb_delay;
 147     int dpb_delay;
 148
 149     // Rate control configuration.
 150     int send_timing_sei;
 151     struct {
 152         VAEncMiscParameterBuffer misc;
 153         VAEncMiscParameterRateControl rc;
 154     } rc_params;
 155     struct {
 156         VAEncMiscParameterBuffer misc;
 157         VAEncMiscParameterHRD hrd;
 158     } hrd_params;
 159
 160 #if VA_CHECK_VERSION(0, 36, 0)
 161     // Speed-quality tradeoff setting.
 162     struct {
 163         VAEncMiscParameterBuffer misc;
 164         VAEncMiscParameterBufferQualityLevel quality;
 165     } quality_params;
 166 #endif
 167 } VAAPIEncodeH264Context;
 168
 169 typedef struct VAAPIEncodeH264Options {
 170     int qp;
 171     int quality;
 172     int low_power;
 173 } VAAPIEncodeH264Options;
 174
 175
 176 #define vseq_var(name)     vseq->name, name
 177 #define vseq_field(name)   vseq->seq_fields.bits.name, name
 178 #define vvui_field(name)   vseq->vui_fields.bits.name, name
 179 #define vpic_var(name)     vpic->name, name
 180 #define vpic_field(name)   vpic->pic_fields.bits.name, name
 181 #define vslice_var(name)   vslice->name, name
 182 #define vslice_field(name) vslice->slice_fields.bits.name, name
 183 #define mseq_var(name)     mseq->name, name
 184 #define mslice_var(name)   mslice->name, name
 185
 186 static void vaapi_encode_h264_write_nal_header(PutBitContext *pbc,
 187                                                int nal_unit_type, int nal_ref_idc)
 188 {
 189     u(1, 0, forbidden_zero_bit);
 190     u(2, nal_ref_idc, nal_ref_idc);
 191     u(5, nal_unit_type, nal_unit_type);
 192 }
 193
 194 static void vaapi_encode_h264_write_trailing_rbsp(PutBitContext *pbc)
 195 {
 196     u(1, 1, rbsp_stop_one_bit);
 197     while (put_bits_count(pbc) & 7)
 198         u(1, 0, rbsp_alignment_zero_bit);
 199 }
 200
 201 static void vaapi_encode_h264_write_vui(PutBitContext *pbc,
 202                                         VAAPIEncodeContext *ctx)
 203 {
 204     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 205     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 206     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 207     int i;
 208
 209     u(1, vvui_field(aspect_ratio_info_present_flag));
 210     if (vseq->vui_fields.bits.aspect_ratio_info_present_flag) {
 211         u(8, vseq_var(aspect_ratio_idc));
 212         if (vseq->aspect_ratio_idc == 255) {
 213             u(16, vseq_var(sar_width));
 214             u(16, vseq_var(sar_height));
 215         }
 216     }
 217
 218     u(1, mseq_var(overscan_info_present_flag));
 219     if (mseq->overscan_info_present_flag)
 220         u(1, mseq_var(overscan_appropriate_flag));
 221
 222     u(1, mseq_var(video_signal_type_present_flag));
 223     if (mseq->video_signal_type_present_flag) {
 224         u(3, mseq_var(video_format));
 225         u(1, mseq_var(video_full_range_flag));
 226         u(1, mseq_var(colour_description_present_flag));
 227         if (mseq->colour_description_present_flag) {
 228             u(8, mseq_var(colour_primaries));
 229             u(8, mseq_var(transfer_characteristics));
 230             u(8, mseq_var(matrix_coefficients));
 231         }
 232     }
 233
 234     u(1, mseq_var(chroma_loc_info_present_flag));
 235     if (mseq->chroma_loc_info_present_flag) {
 236         ue(mseq_var(chroma_sample_loc_type_top_field));
 237         ue(mseq_var(chroma_sample_loc_type_bottom_field));
 238     }
 239
 240     u(1, vvui_field(timing_info_present_flag));
 241     if (vseq->vui_fields.bits.timing_info_present_flag) {
 242         u(32, vseq_var(num_units_in_tick));
 243         u(32, vseq_var(time_scale));
 244         u(1, mseq_var(fixed_frame_rate_flag));
 245     }
 246
 247     u(1, mseq_var(nal_hrd_parameters_present_flag));
 248     if (mseq->nal_hrd_parameters_present_flag) {
 249         ue(mseq_var(cpb_cnt_minus1));
 250         u(4, mseq_var(bit_rate_scale));
 251         u(4, mseq_var(cpb_size_scale));
 252         for (i = 0; i <= mseq->cpb_cnt_minus1; i++) {
 253             ue(mseq_var(bit_rate_value_minus1[i]));
 254             ue(mseq_var(cpb_size_value_minus1[i]));
 255             u(1, mseq_var(cbr_flag[i]));
 256         }
 257         u(5, mseq_var(initial_cpb_removal_delay_length_minus1));
 258         u(5, mseq_var(cpb_removal_delay_length_minus1));
 259         u(5, mseq_var(dpb_output_delay_length_minus1));
 260         u(5, mseq_var(time_offset_length));
 261     }
 262     u(1, mseq_var(vcl_hrd_parameters_present_flag));
 263     if (mseq->vcl_hrd_parameters_present_flag) {
 264         av_assert0(0 && "vcl hrd parameters not supported");
 265     }
 266
 267     if (mseq->nal_hrd_parameters_present_flag ||
 268         mseq->vcl_hrd_parameters_present_flag)
 269         u(1, mseq_var(low_delay_hrd_flag));
 270     u(1, mseq_var(pic_struct_present_flag));
 271
 272     u(1, vvui_field(bitstream_restriction_flag));
 273     if (vseq->vui_fields.bits.bitstream_restriction_flag) {
 274         av_assert0(0 && "bitstream restrictions not supported");
 275     }
 276 }
 277
 278 static void vaapi_encode_h264_write_sps(PutBitContext *pbc,
 279                                         VAAPIEncodeContext *ctx)
 280 {
 281     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 282     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 283     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 284     int i;
 285
 286     vaapi_encode_h264_write_nal_header(pbc, NAL_SPS, 3);
 287
 288     u(8, mseq_var(profile_idc));
 289     u(1, mseq_var(constraint_set0_flag));
 290     u(1, mseq_var(constraint_set1_flag));
 291     u(1, mseq_var(constraint_set2_flag));
 292     u(1, mseq_var(constraint_set3_flag));
 293     u(1, mseq_var(constraint_set4_flag));
 294     u(1, mseq_var(constraint_set5_flag));
 295     u(2, 0, reserved_zero_2bits);
 296
 297     u(8, vseq_var(level_idc));
 298
 299     ue(vseq_var(seq_parameter_set_id));
 300
 301     if (mseq->profile_idc == 100 || mseq->profile_idc == 110 ||
 302         mseq->profile_idc == 122 || mseq->profile_idc == 244 ||
 303         mseq->profile_idc ==  44 || mseq->profile_idc ==  83 ||
 304         mseq->profile_idc ==  86 || mseq->profile_idc == 118 ||
 305         mseq->profile_idc == 128 || mseq->profile_idc == 138) {
 306         ue(vseq_field(chroma_format_idc));
 307
 308         if (vseq->seq_fields.bits.chroma_format_idc == 3)
 309             u(1, mseq_var(separate_colour_plane_flag));
 310
 311         ue(vseq_var(bit_depth_luma_minus8));
 312         ue(vseq_var(bit_depth_chroma_minus8));
 313
 314         u(1, mseq_var(qpprime_y_zero_transform_bypass_flag));
 315
 316         u(1, vseq_field(seq_scaling_matrix_present_flag));
 317         if (vseq->seq_fields.bits.seq_scaling_matrix_present_flag) {
 318             av_assert0(0 && "scaling matrices not supported");
 319         }
 320     }
 321
 322     ue(vseq_field(log2_max_frame_num_minus4));
 323     ue(vseq_field(pic_order_cnt_type));
 324
 325     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 326         ue(vseq_field(log2_max_pic_order_cnt_lsb_minus4));
 327     } else if (vseq->seq_fields.bits.pic_order_cnt_type == 1) {
 328         u(1, mseq_var(delta_pic_order_always_zero_flag));
 329         se(vseq_var(offset_for_non_ref_pic));
 330         se(vseq_var(offset_for_top_to_bottom_field));
 331         ue(vseq_var(num_ref_frames_in_pic_order_cnt_cycle));
 332
 333         for (i = 0; i < vseq->num_ref_frames_in_pic_order_cnt_cycle; i++)
 334             se(vseq_var(offset_for_ref_frame[i]));
 335     }
 336
 337     ue(vseq_var(max_num_ref_frames));
 338     u(1, mseq_var(gaps_in_frame_num_allowed_flag));
 339
 340     ue(vseq->picture_width_in_mbs  - 1, pic_width_in_mbs_minus1);
 341     ue(vseq->picture_height_in_mbs - 1, pic_height_in_mbs_minus1);
 342
 343     u(1, vseq_field(frame_mbs_only_flag));
 344     if (!vseq->seq_fields.bits.frame_mbs_only_flag)
 345         u(1, vseq_field(mb_adaptive_frame_field_flag));
 346
 347     u(1, vseq_field(direct_8x8_inference_flag));
 348
 349     u(1, vseq_var(frame_cropping_flag));
 350     if (vseq->frame_cropping_flag) {
 351         ue(vseq_var(frame_crop_left_offset));
 352         ue(vseq_var(frame_crop_right_offset));
 353         ue(vseq_var(frame_crop_top_offset));
 354         ue(vseq_var(frame_crop_bottom_offset));
 355     }
 356
 357     u(1, vseq_var(vui_parameters_present_flag));
 358     if (vseq->vui_parameters_present_flag)
 359         vaapi_encode_h264_write_vui(pbc, ctx);
 360
 361     vaapi_encode_h264_write_trailing_rbsp(pbc);
 362 }
 363
 364 static void vaapi_encode_h264_write_pps(PutBitContext *pbc,
 365                                         VAAPIEncodeContext *ctx)
 366 {
 367     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 368     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 369     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 370
 371     vaapi_encode_h264_write_nal_header(pbc, NAL_PPS, 3);
 372
 373     ue(vpic_var(pic_parameter_set_id));
 374     ue(vpic_var(seq_parameter_set_id));
 375
 376     u(1, vpic_field(entropy_coding_mode_flag));
 377     u(1, mseq_var(bottom_field_pic_order_in_frame_present_flag));
 378
 379     ue(mseq_var(num_slice_groups_minus1));
 380     if (mseq->num_slice_groups_minus1 > 0) {
 381         ue(mseq_var(slice_group_map_type));
 382         av_assert0(0 && "slice groups not supported");
 383     }
 384
 385     ue(vpic_var(num_ref_idx_l0_active_minus1));
 386     ue(vpic_var(num_ref_idx_l1_active_minus1));
 387
 388     u(1, vpic_field(weighted_pred_flag));
 389     u(2, vpic_field(weighted_bipred_idc));
 390
 391     se(vpic->pic_init_qp - 26, pic_init_qp_minus26);
 392     se(mseq_var(pic_init_qs_minus26));
 393     se(vpic_var(chroma_qp_index_offset));
 394
 395     u(1, vpic_field(deblocking_filter_control_present_flag));
 396     u(1, vpic_field(constrained_intra_pred_flag));
 397     u(1, vpic_field(redundant_pic_cnt_present_flag));
 398     u(1, vpic_field(transform_8x8_mode_flag));
 399
 400     u(1, vpic_field(pic_scaling_matrix_present_flag));
 401     if (vpic->pic_fields.bits.pic_scaling_matrix_present_flag) {
 402         av_assert0(0 && "scaling matrices not supported");
 403     }
 404
 405     se(vpic_var(second_chroma_qp_index_offset));
 406
 407     vaapi_encode_h264_write_trailing_rbsp(pbc);
 408 }
 409
 410 static void vaapi_encode_h264_write_slice_header2(PutBitContext *pbc,
 411                                                   VAAPIEncodeContext *ctx,
 412                                                   VAAPIEncodePicture *pic,
 413                                                   VAAPIEncodeSlice *slice)
 414 {
 415     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 416     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 417     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
 418     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 419     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 420     VAAPIEncodeH264Slice            *pslice = slice->priv_data;
 421     VAAPIEncodeH264MiscSliceParams  *mslice = &pslice->misc_slice_params;
 422
 423     vaapi_encode_h264_write_nal_header(pbc, mslice->nal_unit_type,
 424                                        mslice->nal_ref_idc);
 425
 426     ue(vslice->macroblock_address, first_mb_in_slice);
 427     ue(vslice_var(slice_type));
 428     ue(vpic_var(pic_parameter_set_id));
 429
 430     if (mseq->separate_colour_plane_flag) {
 431         u(2, mslice_var(colour_plane_id));
 432     }
 433
 434     u(4 + vseq->seq_fields.bits.log2_max_frame_num_minus4,
 435       (vpic->frame_num &
 436        ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1)),
 437       frame_num);
 438
 439     if (!vseq->seq_fields.bits.frame_mbs_only_flag) {
 440         u(1, mslice_var(field_pic_flag));
 441         if (mslice->field_pic_flag)
 442             u(1, mslice_var(bottom_field_flag));
 443     }
 444
 445     if (vpic->pic_fields.bits.idr_pic_flag) {
 446         ue(vslice_var(idr_pic_id));
 447     }
 448
 449     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 450         u(4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4,
 451           vslice_var(pic_order_cnt_lsb));
 452         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 453             !mslice->field_pic_flag) {
 454             se(vslice_var(delta_pic_order_cnt_bottom));
 455         }
 456     }
 457
 458     if (vseq->seq_fields.bits.pic_order_cnt_type == 1 &&
 459         !vseq->seq_fields.bits.delta_pic_order_always_zero_flag) {
 460         se(vslice_var(delta_pic_order_cnt[0]));
 461         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 462             !mslice->field_pic_flag) {
 463             se(vslice_var(delta_pic_order_cnt[1]));
 464         }
 465     }
 466
 467     if (vpic->pic_fields.bits.redundant_pic_cnt_present_flag) {
 468         ue(mslice_var(redundant_pic_cnt));
 469     }
 470
 471     if (vslice->slice_type == SLICE_TYPE_B) {
 472         u(1, vslice_var(direct_spatial_mv_pred_flag));
 473     }
 474
 475     if (vslice->slice_type == SLICE_TYPE_P ||
 476         vslice->slice_type == SLICE_TYPE_SP ||
 477         vslice->slice_type == SLICE_TYPE_B) {
 478         u(1, vslice_var(num_ref_idx_active_override_flag));
 479         if (vslice->num_ref_idx_active_override_flag) {
 480             ue(vslice_var(num_ref_idx_l0_active_minus1));
 481             if (vslice->slice_type == SLICE_TYPE_B)
 482                 ue(vslice_var(num_ref_idx_l1_active_minus1));
 483         }
 484     }
 485
 486     if (mslice->nal_unit_type == 20 || mslice->nal_unit_type == 21) {
 487         av_assert0(0 && "no MVC support");
 488     } else {
 489         if (vslice->slice_type % 5 != 2 && vslice->slice_type % 5 != 4) {
 490             u(1, mslice_var(ref_pic_list_modification_flag_l0));
 491             if (mslice->ref_pic_list_modification_flag_l0) {
 492                 av_assert0(0 && "ref pic list modification");
 493             }
 494         }
 495         if (vslice->slice_type % 5 == 1) {
 496             u(1, mslice_var(ref_pic_list_modification_flag_l1));
 497             if (mslice->ref_pic_list_modification_flag_l1) {
 498                 av_assert0(0 && "ref pic list modification");
 499             }
 500         }
 501     }
 502
 503     if ((vpic->pic_fields.bits.weighted_pred_flag &&
 504          (vslice->slice_type == SLICE_TYPE_P ||
 505           vslice->slice_type == SLICE_TYPE_SP)) ||
 506         (vpic->pic_fields.bits.weighted_bipred_idc == 1 &&
 507          vslice->slice_type == SLICE_TYPE_B)) {
 508         av_assert0(0 && "prediction weights not supported");
 509     }
 510
 511     av_assert0(mslice->nal_ref_idc > 0 ==
 512                vpic->pic_fields.bits.reference_pic_flag);
 513     if (mslice->nal_ref_idc != 0) {
 514         if (vpic->pic_fields.bits.idr_pic_flag) {
 515             u(1, mslice_var(no_output_of_prior_pics_flag));
 516             u(1, mslice_var(long_term_reference_flag));
 517         } else {
 518             u(1, mslice_var(adaptive_ref_pic_marking_mode_flag));
 519             if (mslice->adaptive_ref_pic_marking_mode_flag) {
 520                 av_assert0(0 && "MMCOs not supported");
 521             }
 522         }
 523     }
 524
 525     if (vpic->pic_fields.bits.entropy_coding_mode_flag &&
 526         vslice->slice_type != SLICE_TYPE_I &&
 527         vslice->slice_type != SLICE_TYPE_SI) {
 528         ue(vslice_var(cabac_init_idc));
 529     }
 530
 531     se(vslice_var(slice_qp_delta));
 532     if (vslice->slice_type == SLICE_TYPE_SP ||
 533         vslice->slice_type == SLICE_TYPE_SI) {
 534         if (vslice->slice_type == SLICE_TYPE_SP)
 535             u(1, mslice_var(sp_for_switch_flag));
 536         se(mslice_var(slice_qs_delta));
 537     }
 538
 539     if (vpic->pic_fields.bits.deblocking_filter_control_present_flag) {
 540         ue(vslice_var(disable_deblocking_filter_idc));
 541         if (vslice->disable_deblocking_filter_idc != 1) {
 542             se(vslice_var(slice_alpha_c0_offset_div2));
 543             se(vslice_var(slice_beta_offset_div2));
 544         }
 545     }
 546
 547     if (mseq->num_slice_groups_minus1 > 0 &&
 548         mseq->slice_group_map_type >= 3 && mseq->slice_group_map_type <= 5) {
 549         av_assert0(0 && "slice groups not supported");
 550     }
 551
 552     // No alignment - this need not be a byte boundary.
 553 }
 554
 555 static void vaapi_encode_h264_write_buffering_period(PutBitContext *pbc,
 556                                                      VAAPIEncodeContext *ctx,
 557                                                      VAAPIEncodePicture *pic)
 558 {
 559     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 560     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 561     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 562     int i;
 563
 564     ue(vpic_var(seq_parameter_set_id));
 565
 566     if (mseq->nal_hrd_parameters_present_flag) {
 567         for (i = 0; i <= mseq->cpb_cnt_minus1; i++) {
 568             u(mseq->initial_cpb_removal_delay_length_minus1 + 1,
 569               mseq_var(initial_cpb_removal_delay));
 570             u(mseq->initial_cpb_removal_delay_length_minus1 + 1,
 571               mseq_var(initial_cpb_removal_delay_offset));
 572         }
 573     }
 574     if (mseq->vcl_hrd_parameters_present_flag) {
 575         av_assert0(0 && "vcl hrd parameters not supported");
 576     }
 577 }
 578
 579 static void vaapi_encode_h264_write_pic_timing(PutBitContext *pbc,
 580                                                VAAPIEncodeContext *ctx,
 581                                                VAAPIEncodePicture *pic)
 582 {
 583     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 584     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 585     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 586     int i, num_clock_ts;
 587
 588     if (mseq->nal_hrd_parameters_present_flag ||
 589         mseq->vcl_hrd_parameters_present_flag) {
 590         u(mseq->cpb_removal_delay_length_minus1 + 1,
 591           2 * vseq->num_units_in_tick * priv->cpb_delay,
 592           cpb_removal_delay);
 593         u(mseq->dpb_output_delay_length_minus1 + 1,
 594           2 * vseq->num_units_in_tick * priv->dpb_delay,
 595           dpb_output_delay);
 596     }
 597     if (mseq->pic_struct_present_flag) {
 598         u(4, mseq_var(pic_struct));
 599         num_clock_ts = (mseq->pic_struct <= 2 ? 1 :
 600                         mseq->pic_struct <= 4 ? 2 :
 601                         mseq->pic_struct <= 8 ? 3 : 0);
 602         for (i = 0; i < num_clock_ts; i++) {
 603             u(1, 0, clock_timestamp_flag[i]);
 604             // No full timestamp information.
 605         }
 606     }
 607 }
 608
 609 static void vaapi_encode_h264_write_identifier(PutBitContext *pbc,
 610                                                VAAPIEncodeContext *ctx,
 611                                                VAAPIEncodePicture *pic)
 612 {
 613     const char *lavc   = LIBAVCODEC_IDENT;
 614     const char *vaapi  = VA_VERSION_S;
 615     const char *driver = vaQueryVendorString(ctx->hwctx->display);
 616     char tmp[256];
 617     int i;
 618
 619     // Random (version 4) ISO 11578 UUID.
 620     uint8_t uuid[16] = {
 621         0x59, 0x94, 0x8b, 0x28, 0x11, 0xec, 0x45, 0xaf,
 622         0x96, 0x75, 0x19, 0xd4, 0x1f, 0xea, 0xa9, 0x4d,
 623     };
 624
 625     for (i = 0; i < 16; i++)
 626         u(8, uuid[i], uuid_iso_iec_11578);
 627
 628     snprintf(tmp, sizeof(tmp), "%s / VAAPI %s / %s", lavc, vaapi, driver);
 629     for (i = 0; i < sizeof(tmp) && tmp[i]; i++)
 630         u(8, tmp[i], user_data_payload_byte);
 631 }
 632
 633 static void vaapi_encode_h264_write_sei(PutBitContext *pbc,
 634                                         VAAPIEncodeContext *ctx,
 635                                         VAAPIEncodePicture *pic)
 636 {
 637     VAAPIEncodeH264Context *priv = ctx->priv_data;
 638     PutBitContext payload_bits;
 639     char payload[256];
 640     int payload_type, payload_size, i;
 641     void (*write_payload)(PutBitContext *pbc,
 642                           VAAPIEncodeContext *ctx,
 643                           VAAPIEncodePicture *pic) = NULL;
 644
 645     vaapi_encode_h264_write_nal_header(pbc, NAL_SEI, 0);
 646
 647     for (payload_type = 0; payload_type < 64; payload_type++) {
 648         switch (payload_type) {
 649         case SEI_TYPE_BUFFERING_PERIOD:
 650             if (!priv->send_timing_sei ||
 651                 pic->type != PICTURE_TYPE_IDR)
 652                 continue;
 653             write_payload = &vaapi_encode_h264_write_buffering_period;
 654             break;
 655         case SEI_TYPE_PIC_TIMING:
 656             if (!priv->send_timing_sei)
 657                 continue;
 658             write_payload = &vaapi_encode_h264_write_pic_timing;
 659             break;
 660         case SEI_TYPE_USER_DATA_UNREGISTERED:
 661             if (pic->encode_order != 0)
 662                 continue;
 663             write_payload = &vaapi_encode_h264_write_identifier;
 664             break;
 665         default:
 666             continue;
 667         }
 668
 669         init_put_bits(&payload_bits, payload, sizeof(payload));
 670         write_payload(&payload_bits, ctx, pic);
 671         if (put_bits_count(&payload_bits) & 7) {
 672             write_u(&payload_bits, 1, 1, bit_equal_to_one);
 673             while (put_bits_count(&payload_bits) & 7)
 674                 write_u(&payload_bits, 1, 0, bit_equal_to_zero);
 675         }
 676         payload_size = put_bits_count(&payload_bits) / 8;
 677         flush_put_bits(&payload_bits);
 678
 679         u(8, payload_type, last_payload_type_byte);
 680         u(8, payload_size, last_payload_size_byte);
 681         for (i = 0; i < payload_size; i++)
 682             u(8, payload[i] & 0xff, sei_payload);
 683     }
 684
 685     vaapi_encode_h264_write_trailing_rbsp(pbc);
 686 }
 687
 688 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 689                                                    char *data, size_t *data_len)
 690 {
 691     VAAPIEncodeContext *ctx = avctx->priv_data;
 692     PutBitContext pbc;
 693     char tmp[256];
 694     int err;
 695     size_t nal_len, bit_len, bit_pos, next_len;
 696
 697     bit_len = *data_len;
 698     bit_pos = 0;
 699
 700     init_put_bits(&pbc, tmp, sizeof(tmp));
 701     vaapi_encode_h264_write_sps(&pbc, ctx);
 702     nal_len = put_bits_count(&pbc);
 703     flush_put_bits(&pbc);
 704
 705     next_len = bit_len - bit_pos;
 706     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 707                                                        &next_len,
 708                                                        tmp, nal_len);
 709     if (err < 0)
 710         return err;
 711     bit_pos += next_len;
 712
 713     init_put_bits(&pbc, tmp, sizeof(tmp));
 714     vaapi_encode_h264_write_pps(&pbc, ctx);
 715     nal_len = put_bits_count(&pbc);
 716     flush_put_bits(&pbc);
 717
 718     next_len = bit_len - bit_pos;
 719     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 720                                                        &next_len,
 721                                                        tmp, nal_len);
 722     if (err < 0)
 723         return err;
 724     bit_pos += next_len;
 725
 726     *data_len = bit_pos;
 727     return 0;
 728 }
 729
 730 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 731                                                 VAAPIEncodePicture *pic,
 732                                                 VAAPIEncodeSlice *slice,
 733                                                 char *data, size_t *data_len)
 734 {
 735     VAAPIEncodeContext *ctx = avctx->priv_data;
 736     PutBitContext pbc;
 737     char tmp[256];
 738     size_t header_len;
 739
 740     init_put_bits(&pbc, tmp, sizeof(tmp));
 741     vaapi_encode_h264_write_slice_header2(&pbc, ctx, pic, slice);
 742     header_len = put_bits_count(&pbc);
 743     flush_put_bits(&pbc);
 744
 745     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
 746                                                         tmp, header_len);
 747 }
 748
 749 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 750                                                 VAAPIEncodePicture *pic,
 751                                                 int index, int *type,
 752                                                 char *data, size_t *data_len)
 753 {
 754     VAAPIEncodeContext *ctx = avctx->priv_data;
 755     PutBitContext pbc;
 756     char tmp[256];
 757     size_t header_len;
 758
 759     if (index == 0 && ctx->va_rc_mode == VA_RC_CBR) {
 760         *type = VAEncPackedHeaderH264_SEI;
 761
 762         init_put_bits(&pbc, tmp, sizeof(tmp));
 763         vaapi_encode_h264_write_sei(&pbc, ctx, pic);
 764         header_len = put_bits_count(&pbc);
 765         flush_put_bits(&pbc);
 766
 767         return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
 768                                                             tmp, header_len);
 769
 770     } else {
 771         return AVERROR_EOF;
 772     }
 773 }
 774
 775 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 776 {
 777     VAAPIEncodeContext                 *ctx = avctx->priv_data;
 778     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 779     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 780     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 781     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 782     int i;
 783
 784     {
 785         vseq->seq_parameter_set_id = 0;
 786
 787         vseq->level_idc = avctx->level;
 788
 789         vseq->max_num_ref_frames = 2;
 790
 791         vseq->picture_width_in_mbs  = priv->mb_width;
 792         vseq->picture_height_in_mbs = priv->mb_height;
 793
 794         vseq->seq_fields.bits.chroma_format_idc = 1;
 795         vseq->seq_fields.bits.frame_mbs_only_flag = 1;
 796         vseq->seq_fields.bits.direct_8x8_inference_flag = 1;
 797         vseq->seq_fields.bits.log2_max_frame_num_minus4 = 4;
 798         vseq->seq_fields.bits.pic_order_cnt_type = 0;
 799
 800         if (ctx->input_width  != ctx->aligned_width ||
 801             ctx->input_height != ctx->aligned_height) {
 802             vseq->frame_cropping_flag = 1;
 803
 804             vseq->frame_crop_left_offset   = 0;
 805             vseq->frame_crop_right_offset  =
 806                 (ctx->aligned_width - ctx->input_width) / 2;
 807             vseq->frame_crop_top_offset    = 0;
 808             vseq->frame_crop_bottom_offset =
 809                 (ctx->aligned_height - ctx->input_height) / 2;
 810         } else {
 811             vseq->frame_cropping_flag = 0;
 812         }
 813
 814         vseq->vui_parameters_present_flag = 1;
 815         if (avctx->sample_aspect_ratio.num != 0) {
 816             vseq->vui_fields.bits.aspect_ratio_info_present_flag = 1;
 817             // There is a large enum of these which we could support
 818             // individually rather than using the generic X/Y form?
 819             if (avctx->sample_aspect_ratio.num ==
 820                 avctx->sample_aspect_ratio.den) {
 821                 vseq->aspect_ratio_idc = 1;
 822             } else {
 823                 vseq->aspect_ratio_idc = 255; // Extended SAR.
 824                 vseq->sar_width  = avctx->sample_aspect_ratio.num;
 825                 vseq->sar_height = avctx->sample_aspect_ratio.den;
 826             }
 827         }
 828         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 829             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 830             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 831             mseq->video_signal_type_present_flag = 1;
 832             mseq->video_format             = 5; // Unspecified.
 833             mseq->video_full_range_flag    = 0;
 834             mseq->colour_description_present_flag = 1;
 835             // These enums are derived from the standard and hence
 836             // we can just use the values directly.
 837             mseq->colour_primaries         = avctx->color_primaries;
 838             mseq->transfer_characteristics = avctx->color_trc;
 839             mseq->matrix_coefficients      = avctx->colorspace;
 840         }
 841
 842         vseq->bits_per_second = avctx->bit_rate;
 843
 844         vseq->vui_fields.bits.timing_info_present_flag = 1;
 845         if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 846             vseq->num_units_in_tick = avctx->framerate.num;
 847             vseq->time_scale        = 2 * avctx->framerate.den;
 848             mseq->fixed_frame_rate_flag = 1;
 849         } else {
 850             vseq->num_units_in_tick = avctx->time_base.num;
 851             vseq->time_scale        = 2 * avctx->time_base.den;
 852             mseq->fixed_frame_rate_flag = 0;
 853         }
 854
 855         if (ctx->va_rc_mode == VA_RC_CBR) {
 856             priv->send_timing_sei = 1;
 857             mseq->nal_hrd_parameters_present_flag = 1;
 858
 859             mseq->cpb_cnt_minus1 = 0;
 860
 861             // Try to scale these to a sensible range so that the
 862             // golomb encode of the value is not overlong.
 863             mseq->bit_rate_scale =
 864                 av_clip(av_log2(avctx->bit_rate) - 15, 0, 15);
 865             mseq->bit_rate_value_minus1[0] =
 866                 (avctx->bit_rate >> mseq->bit_rate_scale) - 1;
 867
 868             mseq->cpb_size_scale =
 869                 av_clip(av_log2(priv->hrd_params.hrd.buffer_size) - 15, 0, 15);
 870             mseq->cpb_size_value_minus1[0] =
 871                 (priv->hrd_params.hrd.buffer_size >> mseq->cpb_size_scale) - 1;
 872
 873             // CBR mode isn't actually available here, despite naming.
 874             mseq->cbr_flag[0] = 0;
 875
 876             mseq->initial_cpb_removal_delay_length_minus1 = 23;
 877             mseq->cpb_removal_delay_length_minus1         = 23;
 878             mseq->dpb_output_delay_length_minus1          = 7;
 879             mseq->time_offset_length = 0;
 880
 881             // This calculation can easily overflow 32 bits.
 882             mseq->initial_cpb_removal_delay = 90000 *
 883                 (uint64_t)priv->hrd_params.hrd.initial_buffer_fullness /
 884                 priv->hrd_params.hrd.buffer_size;
 885
 886             mseq->initial_cpb_removal_delay_offset = 0;
 887         } else {
 888             priv->send_timing_sei = 0;
 889             mseq->nal_hrd_parameters_present_flag = 0;
 890         }
 891
 892         vseq->intra_period     = ctx->p_per_i * (ctx->b_per_p + 1);
 893         vseq->intra_idr_period = vseq->intra_period;
 894         vseq->ip_period        = ctx->b_per_p + 1;
 895     }
 896
 897     {
 898         vpic->CurrPic.picture_id = VA_INVALID_ID;
 899         vpic->CurrPic.flags      = VA_PICTURE_H264_INVALID;
 900
 901         for (i = 0; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 902             vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 903             vpic->ReferenceFrames[i].flags      = VA_PICTURE_H264_INVALID;
 904         }
 905
 906         vpic->coded_buf = VA_INVALID_ID;
 907
 908         vpic->pic_parameter_set_id = 0;
 909         vpic->seq_parameter_set_id = 0;
 910
 911         vpic->num_ref_idx_l0_active_minus1 = 0;
 912         vpic->num_ref_idx_l1_active_minus1 = 0;
 913
 914         vpic->pic_fields.bits.entropy_coding_mode_flag =
 915             ((avctx->profile & 0xff) != 66);
 916         vpic->pic_fields.bits.weighted_pred_flag = 0;
 917         vpic->pic_fields.bits.weighted_bipred_idc = 0;
 918         vpic->pic_fields.bits.transform_8x8_mode_flag =
 919             ((avctx->profile & 0xff) >= 100);
 920
 921         vpic->pic_init_qp = priv->fixed_qp_idr;
 922     }
 923
 924     {
 925         mseq->profile_idc = avctx->profile & 0xff;
 926
 927         if (avctx->profile & FF_PROFILE_H264_CONSTRAINED)
 928             mseq->constraint_set1_flag = 1;
 929         if (avctx->profile & FF_PROFILE_H264_INTRA)
 930             mseq->constraint_set3_flag = 1;
 931     }
 932
 933     return 0;
 934 }
 935
 936 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 937                                                  VAAPIEncodePicture *pic)
 938 {
 939     VAAPIEncodeContext                *ctx = avctx->priv_data;
 940     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 941     VAEncPictureParameterBufferH264  *vpic = pic->codec_picture_params;
 942     VAAPIEncodeH264Context           *priv = ctx->priv_data;
 943     int i;
 944
 945     if (pic->type == PICTURE_TYPE_IDR) {
 946         av_assert0(pic->display_order == pic->encode_order);
 947         vpic->frame_num = 0;
 948         priv->next_frame_num = 1;
 949         priv->cpb_delay = 0;
 950     } else {
 951         vpic->frame_num = priv->next_frame_num;
 952         if (pic->type != PICTURE_TYPE_B) {
 953             // nal_ref_idc != 0
 954             ++priv->next_frame_num;
 955         }
 956         ++priv->cpb_delay;
 957     }
 958     priv->dpb_delay = pic->display_order - pic->encode_order + 1;
 959
 960     vpic->frame_num = vpic->frame_num &
 961         ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1);
 962
 963     vpic->CurrPic.picture_id          = pic->recon_surface;
 964     vpic->CurrPic.frame_idx           = vpic->frame_num;
 965     vpic->CurrPic.flags               = 0;
 966     vpic->CurrPic.TopFieldOrderCnt    = pic->display_order;
 967     vpic->CurrPic.BottomFieldOrderCnt = pic->display_order;
 968
 969     for (i = 0; i < pic->nb_refs; i++) {
 970         VAAPIEncodePicture *ref = pic->refs[i];
 971         av_assert0(ref && ref->encode_order < pic->encode_order);
 972         vpic->ReferenceFrames[i].picture_id = ref->recon_surface;
 973         vpic->ReferenceFrames[i].frame_idx  = ref->encode_order;
 974         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
 975         vpic->ReferenceFrames[i].TopFieldOrderCnt    = ref->display_order;
 976         vpic->ReferenceFrames[i].BottomFieldOrderCnt = ref->display_order;
 977     }
 978     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 979         vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 980         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_INVALID;
 981     }
 982
 983     vpic->coded_buf = pic->output_buffer;
 984
 985     vpic->pic_fields.bits.idr_pic_flag = (pic->type == PICTURE_TYPE_IDR);
 986     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 987
 988     pic->nb_slices = 1;
 989
 990     return 0;
 991 }
 992
 993 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 994                                                VAAPIEncodePicture *pic,
 995                                                VAAPIEncodeSlice *slice)
 996 {
 997     VAAPIEncodeContext                 *ctx = avctx->priv_data;
 998     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 999     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
1000     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
1001     VAAPIEncodeH264Context            *priv = ctx->priv_data;
1002     VAAPIEncodeH264Slice            *pslice;
1003     VAAPIEncodeH264MiscSliceParams  *mslice;
1004     int i;
1005
1006     slice->priv_data = av_mallocz(sizeof(*pslice));
1007     if (!slice->priv_data)
1008         return AVERROR(ENOMEM);
1009     pslice = slice->priv_data;
1010     mslice = &pslice->misc_slice_params;
1011
1012     if (pic->type == PICTURE_TYPE_IDR)
1013         mslice->nal_unit_type = NAL_IDR_SLICE;
1014     else
1015         mslice->nal_unit_type = NAL_SLICE;
1016
1017     switch (pic->type) {
1018     case PICTURE_TYPE_IDR:
1019         vslice->slice_type  = SLICE_TYPE_I;
1020         mslice->nal_ref_idc = 3;
1021         break;
1022     case PICTURE_TYPE_I:
1023         vslice->slice_type  = SLICE_TYPE_I;
1024         mslice->nal_ref_idc = 2;
1025         break;
1026     case PICTURE_TYPE_P:
1027         vslice->slice_type  = SLICE_TYPE_P;
1028         mslice->nal_ref_idc = 1;
1029         break;
1030     case PICTURE_TYPE_B:
1031         vslice->slice_type  = SLICE_TYPE_B;
1032         mslice->nal_ref_idc = 0;
1033         break;
1034     default:
1035         av_assert0(0 && "invalid picture type");
1036     }
1037
1038     // Only one slice per frame.
1039     vslice->macroblock_address = 0;
1040     vslice->num_macroblocks = priv->mb_width * priv->mb_height;
1041
1042     vslice->macroblock_info = VA_INVALID_ID;
1043
1044     vslice->pic_parameter_set_id = vpic->pic_parameter_set_id;
1045     vslice->idr_pic_id = priv->idr_pic_count++;
1046
1047     vslice->pic_order_cnt_lsb = pic->display_order &
1048         ((1 << (4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4)) - 1);
1049
1050     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1051         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1052         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1053         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1054         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1055     }
1056
1057     av_assert0(pic->nb_refs <= 2);
1058     if (pic->nb_refs >= 1) {
1059         // Backward reference for P- or B-frame.
1060         av_assert0(pic->type == PICTURE_TYPE_P ||
1061                    pic->type == PICTURE_TYPE_B);
1062
1063         vslice->num_ref_idx_l0_active_minus1 = 0;
1064         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1065     }
1066     if (pic->nb_refs >= 2) {
1067         // Forward reference for B-frame.
1068         av_assert0(pic->type == PICTURE_TYPE_B);
1069
1070         vslice->num_ref_idx_l1_active_minus1 = 0;
1071         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1072     }
1073
1074     if (pic->type == PICTURE_TYPE_B)
1075         vslice->slice_qp_delta = priv->fixed_qp_b - vpic->pic_init_qp;
1076     else if (pic->type == PICTURE_TYPE_P)
1077         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;
1078     else
1079         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
1080
1081     vslice->direct_spatial_mv_pred_flag = 1;
1082
1083     return 0;
1084 }
1085
1086 static av_cold int vaapi_encode_h264_init_constant_bitrate(AVCodecContext *avctx)
1087 {
1088     VAAPIEncodeContext      *ctx = avctx->priv_data;
1089     VAAPIEncodeH264Context *priv = ctx->priv_data;
1090     int hrd_buffer_size;
1091     int hrd_initial_buffer_fullness;
1092
1093     if (avctx->rc_buffer_size)
1094         hrd_buffer_size = avctx->rc_buffer_size;
1095     else
1096         hrd_buffer_size = avctx->bit_rate;
1097     if (avctx->rc_initial_buffer_occupancy)
1098         hrd_initial_buffer_fullness = avctx->rc_initial_buffer_occupancy;
1099     else
1100         hrd_initial_buffer_fullness = hrd_buffer_size * 3 / 4;
1101
1102     priv->rc_params.misc.type = VAEncMiscParameterTypeRateControl;
1103     priv->rc_params.rc = (VAEncMiscParameterRateControl) {
1104         .bits_per_second   = avctx->bit_rate,
1105         .target_percentage = 66,
1106         .window_size       = 1000,
1107         .initial_qp        = (avctx->qmax >= 0 ? avctx->qmax : 40),
1108         .min_qp            = (avctx->qmin >= 0 ? avctx->qmin : 18),
1109         .basic_unit_size   = 0,
1110     };
1111     ctx->global_params[ctx->nb_global_params] =
1112         &priv->rc_params.misc;
1113     ctx->global_params_size[ctx->nb_global_params++] =
1114         sizeof(priv->rc_params);
1115
1116     priv->hrd_params.misc.type = VAEncMiscParameterTypeHRD;
1117     priv->hrd_params.hrd = (VAEncMiscParameterHRD) {
1118         .initial_buffer_fullness = hrd_initial_buffer_fullness,
1119         .buffer_size             = hrd_buffer_size,
1120     };
1121     ctx->global_params[ctx->nb_global_params] =
1122         &priv->hrd_params.misc;
1123     ctx->global_params_size[ctx->nb_global_params++] =
1124         sizeof(priv->hrd_params);
1125
1126     // These still need to be  set for pic_init_qp/slice_qp_delta.
1127     priv->fixed_qp_idr = 26;
1128     priv->fixed_qp_p   = 26;
1129     priv->fixed_qp_b   = 26;
1130
1131     av_log(avctx, AV_LOG_DEBUG, "Using constant-bitrate = %d bps.\n",
1132            avctx->bit_rate);
1133     return 0;
1134 }
1135
1136 static av_cold int vaapi_encode_h264_init_fixed_qp(AVCodecContext *avctx)
1137 {
1138     VAAPIEncodeContext      *ctx = avctx->priv_data;
1139     VAAPIEncodeH264Context *priv = ctx->priv_data;
1140     VAAPIEncodeH264Options  *opt = ctx->codec_options;
1141
1142     priv->fixed_qp_p = opt->qp;
1143     if (avctx->i_quant_factor > 0.0)
1144         priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
1145                                     avctx->i_quant_offset) + 0.5);
1146     else
1147         priv->fixed_qp_idr = priv->fixed_qp_p;
1148     if (avctx->b_quant_factor > 0.0)
1149         priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
1150                                   avctx->b_quant_offset) + 0.5);
1151     else
1152         priv->fixed_qp_b = priv->fixed_qp_p;
1153
1154     av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1155            "%d / %d / %d for IDR- / P- / B-frames.\n",
1156            priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1157     return 0;
1158 }
1159
1160 static av_cold int vaapi_encode_h264_init_internal(AVCodecContext *avctx)
1161 {
1162     static const VAConfigAttrib default_config_attributes[] = {
1163         { .type  = VAConfigAttribRTFormat,
1164           .value = VA_RT_FORMAT_YUV420 },
1165         { .type  = VAConfigAttribEncPackedHeaders,
1166           .value = (VA_ENC_PACKED_HEADER_SEQUENCE |
1167                     VA_ENC_PACKED_HEADER_SLICE) },
1168     };
1169
1170     VAAPIEncodeContext      *ctx = avctx->priv_data;
1171     VAAPIEncodeH264Context *priv = ctx->priv_data;
1172     VAAPIEncodeH264Options  *opt = ctx->codec_options;
1173     int i, err;
1174
1175     switch (avctx->profile) {
1176     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
1177         ctx->va_profile = VAProfileH264ConstrainedBaseline;
1178         break;
1179     case FF_PROFILE_H264_BASELINE:
1180         ctx->va_profile = VAProfileH264Baseline;
1181         break;
1182     case FF_PROFILE_H264_MAIN:
1183         ctx->va_profile = VAProfileH264Main;
1184         break;
1185     case FF_PROFILE_H264_EXTENDED:
1186         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1187                "is not supported.\n");
1188         return AVERROR_PATCHWELCOME;
1189     case FF_PROFILE_UNKNOWN:
1190     case FF_PROFILE_H264_HIGH:
1191         ctx->va_profile = VAProfileH264High;
1192         break;
1193     case FF_PROFILE_H264_HIGH_10:
1194     case FF_PROFILE_H264_HIGH_10_INTRA:
1195         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1196                "are not supported.\n");
1197         return AVERROR_PATCHWELCOME;
1198     case FF_PROFILE_H264_HIGH_422:
1199     case FF_PROFILE_H264_HIGH_422_INTRA:
1200     case FF_PROFILE_H264_HIGH_444:
1201     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1202     case FF_PROFILE_H264_HIGH_444_INTRA:
1203     case FF_PROFILE_H264_CAVLC_444:
1204         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1205                "are not supported.\n");
1206         return AVERROR_PATCHWELCOME;
1207     default:
1208         av_log(avctx, AV_LOG_ERROR, "Unknown H.264 profile %d.\n",
1209                avctx->profile);
1210         return AVERROR(EINVAL);
1211     }
1212     if (opt->low_power) {
1213 #if VA_CHECK_VERSION(0, 39, 1)
1214         ctx->va_entrypoint = VAEntrypointEncSliceLP;
1215 #else
1216         av_log(avctx, AV_LOG_ERROR, "Low-power encoding is not "
1217                "supported with this VAAPI version.\n");
1218         return AVERROR(EINVAL);
1219 #endif
1220     } else {
1221         ctx->va_entrypoint = VAEntrypointEncSlice;
1222     }
1223
1224     ctx->input_width    = avctx->width;
1225     ctx->input_height   = avctx->height;
1226     ctx->aligned_width  = FFALIGN(ctx->input_width,  16);
1227     ctx->aligned_height = FFALIGN(ctx->input_height, 16);
1228     priv->mb_width      = ctx->aligned_width  / 16;
1229     priv->mb_height     = ctx->aligned_height / 16;
1230
1231     for (i = 0; i < FF_ARRAY_ELEMS(default_config_attributes); i++) {
1232         ctx->config_attributes[ctx->nb_config_attributes++] =
1233             default_config_attributes[i];
1234     }
1235
1236     if (avctx->bit_rate > 0) {
1237         ctx->va_rc_mode = VA_RC_CBR;
1238         err = vaapi_encode_h264_init_constant_bitrate(avctx);
1239     } else {
1240         ctx->va_rc_mode = VA_RC_CQP;
1241         err = vaapi_encode_h264_init_fixed_qp(avctx);
1242     }
1243     if (err < 0)
1244         return err;
1245
1246     ctx->config_attributes[ctx->nb_config_attributes++] = (VAConfigAttrib) {
1247         .type  = VAConfigAttribRateControl,
1248         .value = ctx->va_rc_mode,
1249     };
1250
1251     if (opt->quality > 0) {
1252 #if VA_CHECK_VERSION(0, 36, 0)
1253         priv->quality_params.misc.type =
1254             VAEncMiscParameterTypeQualityLevel;
1255         priv->quality_params.quality.quality_level = opt->quality;
1256
1257         ctx->global_params[ctx->nb_global_params] =
1258             &priv->quality_params.misc;
1259         ctx->global_params_size[ctx->nb_global_params++] =
1260             sizeof(priv->quality_params);
1261 #else
1262         av_log(avctx, AV_LOG_WARNING, "The encode quality option is not "
1263                "supported with this VAAPI version.\n");
1264 #endif
1265     }
1266
1267     ctx->nb_recon_frames = 20;
1268
1269     return 0;
1270 }
1271
1272 static VAAPIEncodeType vaapi_encode_type_h264 = {
1273     .priv_data_size        = sizeof(VAAPIEncodeH264Context),
1274
1275     .init                  = &vaapi_encode_h264_init_internal,
1276
1277     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1278     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1279
1280     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1281     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1282
1283     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1284     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1285
1286     .sequence_header_type  = VAEncPackedHeaderSequence,
1287     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1288
1289     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1290     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1291
1292     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1293 };
1294
1295 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1296 {
1297     return ff_vaapi_encode_init(avctx, &vaapi_encode_type_h264);
1298 }
1299
1300 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
1301                    offsetof(VAAPIEncodeH264Options, x))
1302 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1303 static const AVOption vaapi_encode_h264_options[] = {
1304     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1305       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
1306     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1307       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, FLAGS },
1308     { "low_power", "Use low-power encoding mode (experimental: only supported "
1309       "on some platforms, does not support all features)",
1310       OFFSET(low_power), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
1311     { NULL },
1312 };
1313
1314 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1315     { "profile",        "100" },
1316     { "level",          "51"  },
1317     { "b",              "0"   },
1318     { "bf",             "2"   },
1319     { "g",              "120" },
1320     { "i_qfactor",      "1.0" },
1321     { "i_qoffset",      "0.0" },
1322     { "b_qfactor",      "1.2" },
1323     { "b_qoffset",      "0.0" },
1324     { NULL },
1325 };
1326
1327 static const AVClass vaapi_encode_h264_class = {
1328     .class_name = "h264_vaapi",
1329     .item_name  = av_default_item_name,
1330     .option     = vaapi_encode_h264_options,
1331     .version    = LIBAVUTIL_VERSION_INT,
1332 };
1333
1334 AVCodec ff_h264_vaapi_encoder = {
1335     .name           = "h264_vaapi",
1336     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1337     .type           = AVMEDIA_TYPE_VIDEO,
1338     .id             = AV_CODEC_ID_H264,
1339     .priv_data_size = (sizeof(VAAPIEncodeContext) +
1340                        sizeof(VAAPIEncodeH264Options)),
1341     .init           = &vaapi_encode_h264_init,
1342     .encode2        = &ff_vaapi_encode2,
1343     .close          = &ff_vaapi_encode_close,
1344     .priv_class     = &vaapi_encode_h264_class,
1345     .capabilities   = AV_CODEC_CAP_DELAY,
1346     .defaults       = vaapi_encode_h264_defaults,
1347     .pix_fmts = (const enum AVPixelFormat[]) {
1348         AV_PIX_FMT_VAAPI,
1349         AV_PIX_FMT_NONE,
1350     },
1351 };