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 "internal.h"
  30 #include "vaapi_encode.h"
  31 #include "vaapi_encode_h26x.h"
  32
  33 enum {
  34     SLICE_TYPE_P  = 0,
  35     SLICE_TYPE_B  = 1,
  36     SLICE_TYPE_I  = 2,
  37     SLICE_TYPE_SP = 3,
  38     SLICE_TYPE_SI = 4,
  39 };
  40
  41 // This structure contains all possibly-useful per-sequence syntax elements
  42 // which are not already contained in the various VAAPI structures.
  43 typedef struct VAAPIEncodeH264MiscSequenceParams {
  44     unsigned int profile_idc;
  45     char constraint_set0_flag;
  46     char constraint_set1_flag;
  47     char constraint_set2_flag;
  48     char constraint_set3_flag;
  49     char constraint_set4_flag;
  50     char constraint_set5_flag;
  51
  52     char separate_colour_plane_flag;
  53     char qpprime_y_zero_transform_bypass_flag;
  54
  55     char gaps_in_frame_num_allowed_flag;
  56     char delta_pic_order_always_zero_flag;
  57     char bottom_field_pic_order_in_frame_present_flag;
  58
  59     unsigned int num_slice_groups_minus1;
  60     unsigned int slice_group_map_type;
  61
  62     int pic_init_qs_minus26;
  63
  64     char vui_parameters_present_flag;
  65 } VAAPIEncodeH264MiscSequenceParams;
  66
  67 // This structure contains all possibly-useful per-slice syntax elements
  68 // which are not already contained in the various VAAPI structures.
  69 typedef struct VAAPIEncodeH264MiscSliceParams {
  70     unsigned int nal_unit_type;
  71     unsigned int nal_ref_idc;
  72
  73     unsigned int colour_plane_id;
  74     char field_pic_flag;
  75     char bottom_field_flag;
  76
  77     unsigned int redundant_pic_cnt;
  78
  79     char sp_for_switch_flag;
  80     int slice_qs_delta;
  81
  82     char ref_pic_list_modification_flag_l0;
  83     char ref_pic_list_modification_flag_l1;
  84
  85     char no_output_of_prior_pics_flag;
  86     char long_term_reference_flag;
  87     char adaptive_ref_pic_marking_mode_flag;
  88 } VAAPIEncodeH264MiscSliceParams;
  89
  90 typedef struct VAAPIEncodeH264Slice {
  91     VAAPIEncodeH264MiscSliceParams misc_slice_params;
  92 } VAAPIEncodeH264Slice;
  93
  94 typedef struct VAAPIEncodeH264Context {
  95     VAAPIEncodeH264MiscSequenceParams misc_sequence_params;
  96
  97     int mb_width;
  98     int mb_height;
  99
 100     int fixed_qp_idr;
 101     int fixed_qp_p;
 102     int fixed_qp_b;
 103
 104     int next_frame_num;
 105     int64_t idr_pic_count;
 106
 107     // Rate control configuration.
 108     struct {
 109         VAEncMiscParameterBuffer misc;
 110         VAEncMiscParameterRateControl rc;
 111     } rc_params;
 112     struct {
 113         VAEncMiscParameterBuffer misc;
 114         VAEncMiscParameterHRD hrd;
 115     } hrd_params;
 116
 117 #if VA_CHECK_VERSION(0, 36, 0)
 118     // Speed-quality tradeoff setting.
 119     struct {
 120         VAEncMiscParameterBuffer misc;
 121         VAEncMiscParameterBufferQualityLevel quality;
 122     } quality_params;
 123 #endif
 124 } VAAPIEncodeH264Context;
 125
 126 typedef struct VAAPIEncodeH264Options {
 127     int qp;
 128     int quality;
 129 } VAAPIEncodeH264Options;
 130
 131
 132 #define vseq_var(name)     vseq->name, name
 133 #define vseq_field(name)   vseq->seq_fields.bits.name, name
 134 #define vpic_var(name)     vpic->name, name
 135 #define vpic_field(name)   vpic->pic_fields.bits.name, name
 136 #define vslice_var(name)   vslice->name, name
 137 #define vslice_field(name) vslice->slice_fields.bits.name, name
 138 #define mseq_var(name)     mseq->name, name
 139 #define mslice_var(name)   mslice->name, name
 140
 141 static void vaapi_encode_h264_write_nal_header(PutBitContext *pbc,
 142                                                int nal_unit_type, int nal_ref_idc)
 143 {
 144     u(1, 0, forbidden_zero_bit);
 145     u(2, nal_ref_idc, nal_ref_idc);
 146     u(5, nal_unit_type, nal_unit_type);
 147 }
 148
 149 static void vaapi_encode_h264_write_trailing_rbsp(PutBitContext *pbc)
 150 {
 151     u(1, 1, rbsp_stop_one_bit);
 152     while (put_bits_count(pbc) & 7)
 153         u(1, 0, rbsp_alignment_zero_bit);
 154 }
 155
 156 static void vaapi_encode_h264_write_sps(PutBitContext *pbc,
 157                                         VAAPIEncodeContext *ctx)
 158 {
 159     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 160     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 161     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 162     int i;
 163
 164     vaapi_encode_h264_write_nal_header(pbc, NAL_SPS, 3);
 165
 166     u(8, mseq_var(profile_idc));
 167     u(1, mseq_var(constraint_set0_flag));
 168     u(1, mseq_var(constraint_set1_flag));
 169     u(1, mseq_var(constraint_set2_flag));
 170     u(1, mseq_var(constraint_set3_flag));
 171     u(1, mseq_var(constraint_set4_flag));
 172     u(1, mseq_var(constraint_set5_flag));
 173     u(2, 0, reserved_zero_2bits);
 174
 175     u(8, vseq_var(level_idc));
 176
 177     ue(vseq_var(seq_parameter_set_id));
 178
 179     if (mseq->profile_idc == 100 || mseq->profile_idc == 110 ||
 180         mseq->profile_idc == 122 || mseq->profile_idc == 244 ||
 181         mseq->profile_idc ==  44 || mseq->profile_idc ==  83 ||
 182         mseq->profile_idc ==  86 || mseq->profile_idc == 118 ||
 183         mseq->profile_idc == 128 || mseq->profile_idc == 138) {
 184         ue(vseq_field(chroma_format_idc));
 185
 186         if (vseq->seq_fields.bits.chroma_format_idc == 3)
 187             u(1, mseq_var(separate_colour_plane_flag));
 188
 189         ue(vseq_var(bit_depth_luma_minus8));
 190         ue(vseq_var(bit_depth_chroma_minus8));
 191
 192         u(1, mseq_var(qpprime_y_zero_transform_bypass_flag));
 193
 194         u(1, vseq_field(seq_scaling_matrix_present_flag));
 195         if (vseq->seq_fields.bits.seq_scaling_matrix_present_flag) {
 196             av_assert0(0 && "scaling matrices not supported");
 197         }
 198     }
 199
 200     ue(vseq_field(log2_max_frame_num_minus4));
 201     ue(vseq_field(pic_order_cnt_type));
 202
 203     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 204         ue(vseq_field(log2_max_pic_order_cnt_lsb_minus4));
 205     } else if (vseq->seq_fields.bits.pic_order_cnt_type == 1) {
 206         u(1, mseq_var(delta_pic_order_always_zero_flag));
 207         se(vseq_var(offset_for_non_ref_pic));
 208         se(vseq_var(offset_for_top_to_bottom_field));
 209         ue(vseq_var(num_ref_frames_in_pic_order_cnt_cycle));
 210
 211         for (i = 0; i < vseq->num_ref_frames_in_pic_order_cnt_cycle; i++)
 212             se(vseq_var(offset_for_ref_frame[i]));
 213     }
 214
 215     ue(vseq_var(max_num_ref_frames));
 216     u(1, mseq_var(gaps_in_frame_num_allowed_flag));
 217
 218     ue(vseq->picture_width_in_mbs  - 1, pic_width_in_mbs_minus1);
 219     ue(vseq->picture_height_in_mbs - 1, pic_height_in_mbs_minus1);
 220
 221     u(1, vseq_field(frame_mbs_only_flag));
 222     if (!vseq->seq_fields.bits.frame_mbs_only_flag)
 223         u(1, vseq_field(mb_adaptive_frame_field_flag));
 224
 225     u(1, vseq_field(direct_8x8_inference_flag));
 226
 227     u(1, vseq_var(frame_cropping_flag));
 228     if (vseq->frame_cropping_flag) {
 229         ue(vseq_var(frame_crop_left_offset));
 230         ue(vseq_var(frame_crop_right_offset));
 231         ue(vseq_var(frame_crop_top_offset));
 232         ue(vseq_var(frame_crop_bottom_offset));
 233     }
 234
 235     u(1, mseq_var(vui_parameters_present_flag));
 236
 237     vaapi_encode_h264_write_trailing_rbsp(pbc);
 238 }
 239
 240 static void vaapi_encode_h264_write_pps(PutBitContext *pbc,
 241                                         VAAPIEncodeContext *ctx)
 242 {
 243     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 244     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 245     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 246
 247     vaapi_encode_h264_write_nal_header(pbc, NAL_PPS, 3);
 248
 249     ue(vpic_var(pic_parameter_set_id));
 250     ue(vpic_var(seq_parameter_set_id));
 251
 252     u(1, vpic_field(entropy_coding_mode_flag));
 253     u(1, mseq_var(bottom_field_pic_order_in_frame_present_flag));
 254
 255     ue(mseq_var(num_slice_groups_minus1));
 256     if (mseq->num_slice_groups_minus1 > 0) {
 257         ue(mseq_var(slice_group_map_type));
 258         av_assert0(0 && "slice groups not supported");
 259     }
 260
 261     ue(vpic_var(num_ref_idx_l0_active_minus1));
 262     ue(vpic_var(num_ref_idx_l1_active_minus1));
 263
 264     u(1, vpic_field(weighted_pred_flag));
 265     u(2, vpic_field(weighted_bipred_idc));
 266
 267     se(vpic->pic_init_qp - 26, pic_init_qp_minus26);
 268     se(mseq_var(pic_init_qs_minus26));
 269     se(vpic_var(chroma_qp_index_offset));
 270
 271     u(1, vpic_field(deblocking_filter_control_present_flag));
 272     u(1, vpic_field(constrained_intra_pred_flag));
 273     u(1, vpic_field(redundant_pic_cnt_present_flag));
 274     u(1, vpic_field(transform_8x8_mode_flag));
 275
 276     u(1, vpic_field(pic_scaling_matrix_present_flag));
 277     if (vpic->pic_fields.bits.pic_scaling_matrix_present_flag) {
 278         av_assert0(0 && "scaling matrices not supported");
 279     }
 280
 281     se(vpic_var(second_chroma_qp_index_offset));
 282
 283     vaapi_encode_h264_write_trailing_rbsp(pbc);
 284 }
 285
 286 static void vaapi_encode_h264_write_slice_header2(PutBitContext *pbc,
 287                                                   VAAPIEncodeContext *ctx,
 288                                                   VAAPIEncodePicture *pic,
 289                                                   VAAPIEncodeSlice *slice)
 290 {
 291     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 292     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 293     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
 294     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 295     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 296     VAAPIEncodeH264Slice            *pslice = slice->priv_data;
 297     VAAPIEncodeH264MiscSliceParams  *mslice = &pslice->misc_slice_params;
 298
 299     vaapi_encode_h264_write_nal_header(pbc, mslice->nal_unit_type,
 300                                        mslice->nal_ref_idc);
 301
 302     ue(vslice->macroblock_address, first_mb_in_slice);
 303     ue(vslice_var(slice_type));
 304     ue(vpic_var(pic_parameter_set_id));
 305
 306     if (mseq->separate_colour_plane_flag) {
 307         u(2, mslice_var(colour_plane_id));
 308     }
 309
 310     u(4 + vseq->seq_fields.bits.log2_max_frame_num_minus4,
 311       (vpic->frame_num &
 312        ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1)),
 313       frame_num);
 314
 315     if (!vseq->seq_fields.bits.frame_mbs_only_flag) {
 316         u(1, mslice_var(field_pic_flag));
 317         if (mslice->field_pic_flag)
 318             u(1, mslice_var(bottom_field_flag));
 319     }
 320
 321     if (vpic->pic_fields.bits.idr_pic_flag) {
 322         ue(vslice_var(idr_pic_id));
 323     }
 324
 325     if (vseq->seq_fields.bits.pic_order_cnt_type == 0) {
 326         u(4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4,
 327           vslice_var(pic_order_cnt_lsb));
 328         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 329             !mslice->field_pic_flag) {
 330             se(vslice_var(delta_pic_order_cnt_bottom));
 331         }
 332     }
 333
 334     if (vseq->seq_fields.bits.pic_order_cnt_type == 1 &&
 335         !vseq->seq_fields.bits.delta_pic_order_always_zero_flag) {
 336         se(vslice_var(delta_pic_order_cnt[0]));
 337         if (mseq->bottom_field_pic_order_in_frame_present_flag &&
 338             !mslice->field_pic_flag) {
 339             se(vslice_var(delta_pic_order_cnt[1]));
 340         }
 341     }
 342
 343     if (vpic->pic_fields.bits.redundant_pic_cnt_present_flag) {
 344         ue(mslice_var(redundant_pic_cnt));
 345     }
 346
 347     if (vslice->slice_type == SLICE_TYPE_B) {
 348         u(1, vslice_var(direct_spatial_mv_pred_flag));
 349     }
 350
 351     if (vslice->slice_type == SLICE_TYPE_P ||
 352         vslice->slice_type == SLICE_TYPE_SP ||
 353         vslice->slice_type == SLICE_TYPE_B) {
 354         u(1, vslice_var(num_ref_idx_active_override_flag));
 355         if (vslice->num_ref_idx_active_override_flag) {
 356             ue(vslice_var(num_ref_idx_l0_active_minus1));
 357             if (vslice->slice_type == SLICE_TYPE_B)
 358                 ue(vslice_var(num_ref_idx_l1_active_minus1));
 359         }
 360     }
 361
 362     if (mslice->nal_unit_type == 20 || mslice->nal_unit_type == 21) {
 363         av_assert0(0 && "no MVC support");
 364     } else {
 365         if (vslice->slice_type % 5 != 2 && vslice->slice_type % 5 != 4) {
 366             u(1, mslice_var(ref_pic_list_modification_flag_l0));
 367             if (mslice->ref_pic_list_modification_flag_l0) {
 368                 av_assert0(0 && "ref pic list modification");
 369             }
 370         }
 371         if (vslice->slice_type % 5 == 1) {
 372             u(1, mslice_var(ref_pic_list_modification_flag_l1));
 373             if (mslice->ref_pic_list_modification_flag_l1) {
 374                 av_assert0(0 && "ref pic list modification");
 375             }
 376         }
 377     }
 378
 379     if ((vpic->pic_fields.bits.weighted_pred_flag &&
 380          (vslice->slice_type == SLICE_TYPE_P ||
 381           vslice->slice_type == SLICE_TYPE_SP)) ||
 382         (vpic->pic_fields.bits.weighted_bipred_idc == 1 &&
 383          vslice->slice_type == SLICE_TYPE_B)) {
 384         av_assert0(0 && "prediction weights not supported");
 385     }
 386
 387     av_assert0(mslice->nal_ref_idc > 0 ==
 388                vpic->pic_fields.bits.reference_pic_flag);
 389     if (mslice->nal_ref_idc != 0) {
 390         if (vpic->pic_fields.bits.idr_pic_flag) {
 391             u(1, mslice_var(no_output_of_prior_pics_flag));
 392             u(1, mslice_var(long_term_reference_flag));
 393         } else {
 394             u(1, mslice_var(adaptive_ref_pic_marking_mode_flag));
 395             if (mslice->adaptive_ref_pic_marking_mode_flag) {
 396                 av_assert0(0 && "MMCOs not supported");
 397             }
 398         }
 399     }
 400
 401     if (vpic->pic_fields.bits.entropy_coding_mode_flag &&
 402         vslice->slice_type != SLICE_TYPE_I &&
 403         vslice->slice_type != SLICE_TYPE_SI) {
 404         ue(vslice_var(cabac_init_idc));
 405     }
 406
 407     se(vslice_var(slice_qp_delta));
 408     if (vslice->slice_type == SLICE_TYPE_SP ||
 409         vslice->slice_type == SLICE_TYPE_SI) {
 410         if (vslice->slice_type == SLICE_TYPE_SP)
 411             u(1, mslice_var(sp_for_switch_flag));
 412         se(mslice_var(slice_qs_delta));
 413     }
 414
 415     if (vpic->pic_fields.bits.deblocking_filter_control_present_flag) {
 416         ue(vslice_var(disable_deblocking_filter_idc));
 417         if (vslice->disable_deblocking_filter_idc != 1) {
 418             se(vslice_var(slice_alpha_c0_offset_div2));
 419             se(vslice_var(slice_beta_offset_div2));
 420         }
 421     }
 422
 423     if (mseq->num_slice_groups_minus1 > 0 &&
 424         mseq->slice_group_map_type >= 3 && mseq->slice_group_map_type <= 5) {
 425         av_assert0(0 && "slice groups not supported");
 426     }
 427
 428     // No alignment - this need not be a byte boundary.
 429 }
 430
 431 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 432                                                    char *data, size_t *data_len)
 433 {
 434     VAAPIEncodeContext *ctx = avctx->priv_data;
 435     PutBitContext pbc;
 436     char tmp[256];
 437     int err;
 438     size_t nal_len, bit_len, bit_pos, next_len;
 439
 440     bit_len = *data_len;
 441     bit_pos = 0;
 442
 443     init_put_bits(&pbc, tmp, sizeof(tmp));
 444     vaapi_encode_h264_write_sps(&pbc, ctx);
 445     nal_len = put_bits_count(&pbc);
 446     flush_put_bits(&pbc);
 447
 448     next_len = bit_len - bit_pos;
 449     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 450                                                        &next_len,
 451                                                        tmp, nal_len);
 452     if (err < 0)
 453         return err;
 454     bit_pos += next_len;
 455
 456     init_put_bits(&pbc, tmp, sizeof(tmp));
 457     vaapi_encode_h264_write_pps(&pbc, ctx);
 458     nal_len = put_bits_count(&pbc);
 459     flush_put_bits(&pbc);
 460
 461     next_len = bit_len - bit_pos;
 462     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,
 463                                                        &next_len,
 464                                                        tmp, nal_len);
 465     if (err < 0)
 466         return err;
 467     bit_pos += next_len;
 468
 469     *data_len = bit_pos;
 470     return 0;
 471 }
 472
 473 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 474                                                 VAAPIEncodePicture *pic,
 475                                                 VAAPIEncodeSlice *slice,
 476                                                 char *data, size_t *data_len)
 477 {
 478     VAAPIEncodeContext *ctx = avctx->priv_data;
 479     PutBitContext pbc;
 480     char tmp[256];
 481     size_t header_len;
 482
 483     init_put_bits(&pbc, tmp, sizeof(tmp));
 484     vaapi_encode_h264_write_slice_header2(&pbc, ctx, pic, slice);
 485     header_len = put_bits_count(&pbc);
 486     flush_put_bits(&pbc);
 487
 488     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,
 489                                                         tmp, header_len);
 490 }
 491
 492 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 493 {
 494     VAAPIEncodeContext                 *ctx = avctx->priv_data;
 495     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 496     VAEncPictureParameterBufferH264   *vpic = ctx->codec_picture_params;
 497     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 498     VAAPIEncodeH264MiscSequenceParams *mseq = &priv->misc_sequence_params;
 499     int i;
 500
 501     {
 502         vseq->seq_parameter_set_id = 0;
 503
 504         vseq->level_idc = avctx->level;
 505
 506         vseq->max_num_ref_frames = 2;
 507
 508         vseq->picture_width_in_mbs  = priv->mb_width;
 509         vseq->picture_height_in_mbs = priv->mb_height;
 510
 511         vseq->seq_fields.bits.chroma_format_idc = 1;
 512         vseq->seq_fields.bits.frame_mbs_only_flag = 1;
 513         vseq->seq_fields.bits.direct_8x8_inference_flag = 1;
 514         vseq->seq_fields.bits.log2_max_frame_num_minus4 = 4;
 515         vseq->seq_fields.bits.pic_order_cnt_type = 0;
 516
 517         if (ctx->input_width  != ctx->aligned_width ||
 518             ctx->input_height != ctx->aligned_height) {
 519             vseq->frame_cropping_flag = 1;
 520
 521             vseq->frame_crop_left_offset   = 0;
 522             vseq->frame_crop_right_offset  =
 523                 (ctx->aligned_width - ctx->input_width) / 2;
 524             vseq->frame_crop_top_offset    = 0;
 525             vseq->frame_crop_bottom_offset =
 526                 (ctx->aligned_height - ctx->input_height) / 2;
 527         } else {
 528             vseq->frame_cropping_flag = 0;
 529         }
 530
 531         vseq->bits_per_second = avctx->bit_rate;
 532         if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 533             vseq->num_units_in_tick = avctx->framerate.num;
 534             vseq->time_scale        = 2 * avctx->framerate.den;
 535         } else {
 536             vseq->num_units_in_tick = avctx->time_base.num;
 537             vseq->time_scale        = 2 * avctx->time_base.den;
 538         }
 539
 540         vseq->intra_period     = ctx->p_per_i * (ctx->b_per_p + 1);
 541         vseq->intra_idr_period = vseq->intra_period;
 542         vseq->ip_period        = ctx->b_per_p + 1;
 543     }
 544
 545     {
 546         vpic->CurrPic.picture_id = VA_INVALID_ID;
 547         vpic->CurrPic.flags      = VA_PICTURE_H264_INVALID;
 548
 549         for (i = 0; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 550             vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 551             vpic->ReferenceFrames[i].flags      = VA_PICTURE_H264_INVALID;
 552         }
 553
 554         vpic->coded_buf = VA_INVALID_ID;
 555
 556         vpic->pic_parameter_set_id = 0;
 557         vpic->seq_parameter_set_id = 0;
 558
 559         vpic->num_ref_idx_l0_active_minus1 = 0;
 560         vpic->num_ref_idx_l1_active_minus1 = 0;
 561
 562         vpic->pic_fields.bits.entropy_coding_mode_flag =
 563             ((avctx->profile & 0xff) != 66);
 564         vpic->pic_fields.bits.weighted_pred_flag = 0;
 565         vpic->pic_fields.bits.weighted_bipred_idc = 0;
 566         vpic->pic_fields.bits.transform_8x8_mode_flag =
 567             ((avctx->profile & 0xff) >= 100);
 568
 569         vpic->pic_init_qp = priv->fixed_qp_idr;
 570     }
 571
 572     {
 573         mseq->profile_idc = avctx->profile & 0xff;
 574
 575         if (avctx->profile & FF_PROFILE_H264_CONSTRAINED)
 576             mseq->constraint_set1_flag = 1;
 577         if (avctx->profile & FF_PROFILE_H264_INTRA)
 578             mseq->constraint_set3_flag = 1;
 579     }
 580
 581     return 0;
 582 }
 583
 584 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 585                                                  VAAPIEncodePicture *pic)
 586 {
 587     VAAPIEncodeContext                *ctx = avctx->priv_data;
 588     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 589     VAEncPictureParameterBufferH264  *vpic = pic->codec_picture_params;
 590     VAAPIEncodeH264Context           *priv = ctx->priv_data;
 591     int i;
 592
 593     if (pic->type == PICTURE_TYPE_IDR) {
 594         av_assert0(pic->display_order == pic->encode_order);
 595         vpic->frame_num = 0;
 596         priv->next_frame_num = 1;
 597     } else {
 598         vpic->frame_num = priv->next_frame_num;
 599         if (pic->type != PICTURE_TYPE_B) {
 600             // nal_ref_idc != 0
 601             ++priv->next_frame_num;
 602         }
 603     }
 604
 605     vpic->frame_num = vpic->frame_num &
 606         ((1 << (4 + vseq->seq_fields.bits.log2_max_frame_num_minus4)) - 1);
 607
 608     vpic->CurrPic.picture_id          = pic->recon_surface;
 609     vpic->CurrPic.frame_idx           = vpic->frame_num;
 610     vpic->CurrPic.flags               = 0;
 611     vpic->CurrPic.TopFieldOrderCnt    = pic->display_order;
 612     vpic->CurrPic.BottomFieldOrderCnt = pic->display_order;
 613
 614     for (i = 0; i < pic->nb_refs; i++) {
 615         VAAPIEncodePicture *ref = pic->refs[i];
 616         av_assert0(ref && ref->encode_order < pic->encode_order);
 617         vpic->ReferenceFrames[i].picture_id = ref->recon_surface;
 618         vpic->ReferenceFrames[i].frame_idx  = ref->encode_order;
 619         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
 620         vpic->ReferenceFrames[i].TopFieldOrderCnt    = ref->display_order;
 621         vpic->ReferenceFrames[i].BottomFieldOrderCnt = ref->display_order;
 622     }
 623     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 624         vpic->ReferenceFrames[i].picture_id = VA_INVALID_ID;
 625         vpic->ReferenceFrames[i].flags = VA_PICTURE_H264_INVALID;
 626     }
 627
 628     vpic->coded_buf = pic->output_buffer;
 629
 630     vpic->pic_fields.bits.idr_pic_flag = (pic->type == PICTURE_TYPE_IDR);
 631     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 632
 633     pic->nb_slices = 1;
 634
 635     return 0;
 636 }
 637
 638 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 639                                                VAAPIEncodePicture *pic,
 640                                                VAAPIEncodeSlice *slice)
 641 {
 642     VAAPIEncodeContext                 *ctx = avctx->priv_data;
 643     VAEncSequenceParameterBufferH264  *vseq = ctx->codec_sequence_params;
 644     VAEncPictureParameterBufferH264   *vpic = pic->codec_picture_params;
 645     VAEncSliceParameterBufferH264   *vslice = slice->codec_slice_params;
 646     VAAPIEncodeH264Context            *priv = ctx->priv_data;
 647     VAAPIEncodeH264Slice            *pslice;
 648     VAAPIEncodeH264MiscSliceParams  *mslice;
 649     int i;
 650
 651     slice->priv_data = av_mallocz(sizeof(*pslice));
 652     if (!slice->priv_data)
 653         return AVERROR(ENOMEM);
 654     pslice = slice->priv_data;
 655     mslice = &pslice->misc_slice_params;
 656
 657     if (pic->type == PICTURE_TYPE_IDR)
 658         mslice->nal_unit_type = NAL_IDR_SLICE;
 659     else
 660         mslice->nal_unit_type = NAL_SLICE;
 661
 662     switch (pic->type) {
 663     case PICTURE_TYPE_IDR:
 664         vslice->slice_type  = SLICE_TYPE_I;
 665         mslice->nal_ref_idc = 3;
 666         break;
 667     case PICTURE_TYPE_I:
 668         vslice->slice_type  = SLICE_TYPE_I;
 669         mslice->nal_ref_idc = 2;
 670         break;
 671     case PICTURE_TYPE_P:
 672         vslice->slice_type  = SLICE_TYPE_P;
 673         mslice->nal_ref_idc = 1;
 674         break;
 675     case PICTURE_TYPE_B:
 676         vslice->slice_type  = SLICE_TYPE_B;
 677         mslice->nal_ref_idc = 0;
 678         break;
 679     default:
 680         av_assert0(0 && "invalid picture type");
 681     }
 682
 683     // Only one slice per frame.
 684     vslice->macroblock_address = 0;
 685     vslice->num_macroblocks = priv->mb_width * priv->mb_height;
 686
 687     vslice->macroblock_info = VA_INVALID_ID;
 688
 689     vslice->pic_parameter_set_id = vpic->pic_parameter_set_id;
 690     vslice->idr_pic_id = priv->idr_pic_count++;
 691
 692     vslice->pic_order_cnt_lsb = pic->display_order &
 693         ((1 << (4 + vseq->seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4)) - 1);
 694
 695     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
 696         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
 697         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
 698         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
 699         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
 700     }
 701
 702     av_assert0(pic->nb_refs <= 2);
 703     if (pic->nb_refs >= 1) {
 704         // Backward reference for P- or B-frame.
 705         av_assert0(pic->type == PICTURE_TYPE_P ||
 706                    pic->type == PICTURE_TYPE_B);
 707
 708         vslice->num_ref_idx_l0_active_minus1 = 0;
 709         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
 710     }
 711     if (pic->nb_refs >= 2) {
 712         // Forward reference for B-frame.
 713         av_assert0(pic->type == PICTURE_TYPE_B);
 714
 715         vslice->num_ref_idx_l1_active_minus1 = 0;
 716         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
 717     }
 718
 719     if (pic->type == PICTURE_TYPE_B)
 720         vslice->slice_qp_delta = priv->fixed_qp_b - vpic->pic_init_qp;
 721     else if (pic->type == PICTURE_TYPE_P)
 722         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;
 723     else
 724         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;
 725
 726     vslice->direct_spatial_mv_pred_flag = 1;
 727
 728     return 0;
 729 }
 730
 731 static av_cold int vaapi_encode_h264_init_constant_bitrate(AVCodecContext *avctx)
 732 {
 733     VAAPIEncodeContext      *ctx = avctx->priv_data;
 734     VAAPIEncodeH264Context *priv = ctx->priv_data;
 735     int hrd_buffer_size;
 736     int hrd_initial_buffer_fullness;
 737
 738     if (avctx->rc_buffer_size)
 739         hrd_buffer_size = avctx->rc_buffer_size;
 740     else
 741         hrd_buffer_size = avctx->bit_rate;
 742     if (avctx->rc_initial_buffer_occupancy)
 743         hrd_initial_buffer_fullness = avctx->rc_initial_buffer_occupancy;
 744     else
 745         hrd_initial_buffer_fullness = hrd_buffer_size * 3 / 4;
 746
 747     priv->rc_params.misc.type = VAEncMiscParameterTypeRateControl;
 748     priv->rc_params.rc = (VAEncMiscParameterRateControl) {
 749         .bits_per_second   = avctx->bit_rate,
 750         .target_percentage = 66,
 751         .window_size       = 1000,
 752         .initial_qp        = (avctx->qmax >= 0 ? avctx->qmax : 40),
 753         .min_qp            = (avctx->qmin >= 0 ? avctx->qmin : 18),
 754         .basic_unit_size   = 0,
 755     };
 756     ctx->global_params[ctx->nb_global_params] =
 757         &priv->rc_params.misc;
 758     ctx->global_params_size[ctx->nb_global_params++] =
 759         sizeof(priv->rc_params);
 760
 761     priv->hrd_params.misc.type = VAEncMiscParameterTypeHRD;
 762     priv->hrd_params.hrd = (VAEncMiscParameterHRD) {
 763         .initial_buffer_fullness = hrd_initial_buffer_fullness,
 764         .buffer_size             = hrd_buffer_size,
 765     };
 766     ctx->global_params[ctx->nb_global_params] =
 767         &priv->hrd_params.misc;
 768     ctx->global_params_size[ctx->nb_global_params++] =
 769         sizeof(priv->hrd_params);
 770
 771     // These still need to be  set for pic_init_qp/slice_qp_delta.
 772     priv->fixed_qp_idr = 26;
 773     priv->fixed_qp_p   = 26;
 774     priv->fixed_qp_b   = 26;
 775
 776     av_log(avctx, AV_LOG_DEBUG, "Using constant-bitrate = %d bps.\n",
 777            avctx->bit_rate);
 778     return 0;
 779 }
 780
 781 static av_cold int vaapi_encode_h264_init_fixed_qp(AVCodecContext *avctx)
 782 {
 783     VAAPIEncodeContext      *ctx = avctx->priv_data;
 784     VAAPIEncodeH264Context *priv = ctx->priv_data;
 785     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 786
 787     priv->fixed_qp_p = opt->qp;
 788     if (avctx->i_quant_factor > 0.0)
 789         priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
 790                                     avctx->i_quant_offset) + 0.5);
 791     else
 792         priv->fixed_qp_idr = priv->fixed_qp_p;
 793     if (avctx->b_quant_factor > 0.0)
 794         priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
 795                                   avctx->b_quant_offset) + 0.5);
 796     else
 797         priv->fixed_qp_b = priv->fixed_qp_p;
 798
 799     av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
 800            "%d / %d / %d for IDR- / P- / B-frames.\n",
 801            priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
 802     return 0;
 803 }
 804
 805 static av_cold int vaapi_encode_h264_init_internal(AVCodecContext *avctx)
 806 {
 807     static const VAConfigAttrib default_config_attributes[] = {
 808         { .type  = VAConfigAttribRTFormat,
 809           .value = VA_RT_FORMAT_YUV420 },
 810         { .type  = VAConfigAttribEncPackedHeaders,
 811           .value = (VA_ENC_PACKED_HEADER_SEQUENCE |
 812                     VA_ENC_PACKED_HEADER_SLICE) },
 813     };
 814
 815     VAAPIEncodeContext      *ctx = avctx->priv_data;
 816     VAAPIEncodeH264Context *priv = ctx->priv_data;
 817     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 818     int i, err;
 819
 820     switch (avctx->profile) {
 821     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
 822         ctx->va_profile = VAProfileH264ConstrainedBaseline;
 823         break;
 824     case FF_PROFILE_H264_BASELINE:
 825         ctx->va_profile = VAProfileH264Baseline;
 826         break;
 827     case FF_PROFILE_H264_MAIN:
 828         ctx->va_profile = VAProfileH264Main;
 829         break;
 830     case FF_PROFILE_H264_EXTENDED:
 831         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
 832                "is not supported.\n");
 833         return AVERROR_PATCHWELCOME;
 834     case FF_PROFILE_UNKNOWN:
 835     case FF_PROFILE_H264_HIGH:
 836         ctx->va_profile = VAProfileH264High;
 837         break;
 838     case FF_PROFILE_H264_HIGH_10:
 839     case FF_PROFILE_H264_HIGH_10_INTRA:
 840         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
 841                "are not supported.\n");
 842         return AVERROR_PATCHWELCOME;
 843     case FF_PROFILE_H264_HIGH_422:
 844     case FF_PROFILE_H264_HIGH_422_INTRA:
 845     case FF_PROFILE_H264_HIGH_444:
 846     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
 847     case FF_PROFILE_H264_HIGH_444_INTRA:
 848     case FF_PROFILE_H264_CAVLC_444:
 849         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
 850                "are not supported.\n");
 851         return AVERROR_PATCHWELCOME;
 852     default:
 853         av_log(avctx, AV_LOG_ERROR, "Unknown H.264 profile %d.\n",
 854                avctx->profile);
 855         return AVERROR(EINVAL);
 856     }
 857     ctx->va_entrypoint = VAEntrypointEncSlice;
 858
 859     ctx->input_width    = avctx->width;
 860     ctx->input_height   = avctx->height;
 861     ctx->aligned_width  = FFALIGN(ctx->input_width,  16);
 862     ctx->aligned_height = FFALIGN(ctx->input_height, 16);
 863     priv->mb_width      = ctx->aligned_width  / 16;
 864     priv->mb_height     = ctx->aligned_height / 16;
 865
 866     for (i = 0; i < FF_ARRAY_ELEMS(default_config_attributes); i++) {
 867         ctx->config_attributes[ctx->nb_config_attributes++] =
 868             default_config_attributes[i];
 869     }
 870
 871     if (avctx->bit_rate > 0) {
 872         ctx->va_rc_mode = VA_RC_CBR;
 873         err = vaapi_encode_h264_init_constant_bitrate(avctx);
 874     } else {
 875         ctx->va_rc_mode = VA_RC_CQP;
 876         err = vaapi_encode_h264_init_fixed_qp(avctx);
 877     }
 878     if (err < 0)
 879         return err;
 880
 881     ctx->config_attributes[ctx->nb_config_attributes++] = (VAConfigAttrib) {
 882         .type  = VAConfigAttribRateControl,
 883         .value = ctx->va_rc_mode,
 884     };
 885
 886     if (opt->quality > 0) {
 887 #if VA_CHECK_VERSION(0, 36, 0)
 888         priv->quality_params.misc.type =
 889             VAEncMiscParameterTypeQualityLevel;
 890         priv->quality_params.quality.quality_level = opt->quality;
 891
 892         ctx->global_params[ctx->nb_global_params] =
 893             &priv->quality_params.misc;
 894         ctx->global_params_size[ctx->nb_global_params++] =
 895             sizeof(priv->quality_params);
 896 #else
 897         av_log(avctx, AV_LOG_WARNING, "The encode quality option is not "
 898                "supported with this VAAPI version.\n");
 899 #endif
 900     }
 901
 902     ctx->nb_recon_frames = 20;
 903
 904     return 0;
 905 }
 906
 907 static VAAPIEncodeType vaapi_encode_type_h264 = {
 908     .priv_data_size        = sizeof(VAAPIEncodeH264Context),
 909
 910     .init                  = &vaapi_encode_h264_init_internal,
 911
 912     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
 913     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
 914
 915     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
 916     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
 917
 918     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
 919     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
 920
 921     .sequence_header_type  = VAEncPackedHeaderSequence,
 922     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
 923
 924     .slice_header_type     = VAEncPackedHeaderH264_Slice,
 925     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
 926 };
 927
 928 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
 929 {
 930     return ff_vaapi_encode_init(avctx, &vaapi_encode_type_h264);
 931 }
 932
 933 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
 934                    offsetof(VAAPIEncodeH264Options, x))
 935 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 936 static const AVOption vaapi_encode_h264_options[] = {
 937     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
 938       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
 939     { "quality", "Set encode quality (trades off against speed, higher is faster)",
 940       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, FLAGS },
 941     { NULL },
 942 };
 943
 944 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
 945     { "profile",        "100" },
 946     { "level",          "51"  },
 947     { "b",              "0"   },
 948     { "bf",             "2"   },
 949     { "g",              "120" },
 950     { "i_qfactor",      "1.0" },
 951     { "i_qoffset",      "0.0" },
 952     { "b_qfactor",      "1.2" },
 953     { "b_qoffset",      "0.0" },
 954     { NULL },
 955 };
 956
 957 static const AVClass vaapi_encode_h264_class = {
 958     .class_name = "h264_vaapi",
 959     .item_name  = av_default_item_name,
 960     .option     = vaapi_encode_h264_options,
 961     .version    = LIBAVUTIL_VERSION_INT,
 962 };
 963
 964 AVCodec ff_h264_vaapi_encoder = {
 965     .name           = "h264_vaapi",
 966     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
 967     .type           = AVMEDIA_TYPE_VIDEO,
 968     .id             = AV_CODEC_ID_H264,
 969     .priv_data_size = (sizeof(VAAPIEncodeContext) +
 970                        sizeof(VAAPIEncodeH264Options)),
 971     .init           = &vaapi_encode_h264_init,
 972     .encode2        = &ff_vaapi_encode2,
 973     .close          = &ff_vaapi_encode_close,
 974     .priv_class     = &vaapi_encode_h264_class,
 975     .capabilities   = AV_CODEC_CAP_DELAY,
 976     .defaults       = vaapi_encode_h264_defaults,
 977     .pix_fmts = (const enum AVPixelFormat[]) {
 978         AV_PIX_FMT_VAAPI,
 979         AV_PIX_FMT_NONE,
 980     },
 981 };