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