git.sesse.net Git - ffmpeg/blob - libavcodec/vaapi_encode_h264.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <string.h>
  20
  21 #include <va/va.h>
  22 #include <va/va_enc_h264.h>
  23
  24 #include "libavutil/avassert.h"
  25 #include "libavutil/common.h"
  26 #include "libavutil/internal.h"
  27 #include "libavutil/opt.h"
  28
  29 #include "avcodec.h"
  30 #include "cbs.h"
  31 #include "cbs_h264.h"
  32 #include "h264.h"
  33 #include "h264_levels.h"
  34 #include "h264_sei.h"
  35 #include "internal.h"
  36 #include "vaapi_encode.h"
  37
  38 enum {
  39     SEI_TIMING         = 0x01,
  40     SEI_IDENTIFIER     = 0x02,
  41     SEI_RECOVERY_POINT = 0x04,
  42 };
  43
  44 // Random (version 4) ISO 11578 UUID.
  45 static const uint8_t vaapi_encode_h264_sei_identifier_uuid[16] = {
  46     0x59, 0x94, 0x8b, 0x28, 0x11, 0xec, 0x45, 0xaf,
  47     0x96, 0x75, 0x19, 0xd4, 0x1f, 0xea, 0xa9, 0x4d,
  48 };
  49
  50 typedef struct VAAPIEncodeH264Picture {
  51     int frame_num;
  52     int pic_order_cnt;
  53
  54     int64_t last_idr_frame;
  55     uint16_t idr_pic_id;
  56
  57     int primary_pic_type;
  58     int slice_type;
  59
  60     int cpb_delay;
  61     int dpb_delay;
  62 } VAAPIEncodeH264Picture;
  63
  64 typedef struct VAAPIEncodeH264Context {
  65     VAAPIEncodeContext common;
  66
  67     // User options.
  68     int qp;
  69     int quality;
  70     int coder;
  71     int aud;
  72     int sei;
  73     int profile;
  74     int level;
  75
  76     // Derived settings.
  77     int mb_width;
  78     int mb_height;
  79
  80     int fixed_qp_idr;
  81     int fixed_qp_p;
  82     int fixed_qp_b;
  83
  84     int dpb_frames;
  85
  86     // Writer structures.
  87     CodedBitstreamContext *cbc;
  88     CodedBitstreamFragment current_access_unit;
  89
  90     H264RawAUD   raw_aud;
  91     H264RawSPS   raw_sps;
  92     H264RawPPS   raw_pps;
  93     H264RawSlice raw_slice;
  94
  95     H264RawSEIBufferingPeriod      sei_buffering_period;
  96     H264RawSEIPicTiming            sei_pic_timing;
  97     H264RawSEIRecoveryPoint        sei_recovery_point;
  98     SEIRawUserDataUnregistered     sei_identifier;
  99     char                          *sei_identifier_string;
 100
 101     int aud_needed;
 102     int sei_needed;
 103     int sei_cbr_workaround_needed;
 104 } VAAPIEncodeH264Context;
 105
 106
 107 static int vaapi_encode_h264_write_access_unit(AVCodecContext *avctx,
 108                                                char *data, size_t *data_len,
 109                                                CodedBitstreamFragment *au)
 110 {
 111     VAAPIEncodeH264Context *priv = avctx->priv_data;
 112     int err;
 113
 114     err = ff_cbs_write_fragment_data(priv->cbc, au);
 115     if (err < 0) {
 116         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");
 117         return err;
 118     }
 119
 120     if (*data_len < 8 * au->data_size - au->data_bit_padding) {
 121         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "
 122                "%zu < %zu.\n", *data_len,
 123                8 * au->data_size - au->data_bit_padding);
 124         return AVERROR(ENOSPC);
 125     }
 126
 127     memcpy(data, au->data, au->data_size);
 128     *data_len = 8 * au->data_size - au->data_bit_padding;
 129
 130     return 0;
 131 }
 132
 133 static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
 134                                      CodedBitstreamFragment *au,
 135                                      void *nal_unit)
 136 {
 137     H264RawNALUnitHeader *header = nal_unit;
 138     int err;
 139
 140     err = ff_cbs_insert_unit_content(au, -1,
 141                                      header->nal_unit_type, nal_unit, NULL);
 142     if (err < 0) {
 143         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
 144                "type = %d.\n", header->nal_unit_type);
 145         return err;
 146     }
 147
 148     return 0;
 149 }
 150
 151 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 152                                                    char *data, size_t *data_len)
 153 {
 154     VAAPIEncodeH264Context *priv = avctx->priv_data;
 155     CodedBitstreamFragment   *au = &priv->current_access_unit;
 156     int err;
 157
 158     if (priv->aud_needed) {
 159         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 160         if (err < 0)
 161             goto fail;
 162         priv->aud_needed = 0;
 163     }
 164
 165     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_sps);
 166     if (err < 0)
 167         goto fail;
 168
 169     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_pps);
 170     if (err < 0)
 171         goto fail;
 172
 173     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 174 fail:
 175     ff_cbs_fragment_reset(au);
 176     return err;
 177 }
 178
 179 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 180                                                 VAAPIEncodePicture *pic,
 181                                                 VAAPIEncodeSlice *slice,
 182                                                 char *data, size_t *data_len)
 183 {
 184     VAAPIEncodeH264Context *priv = avctx->priv_data;
 185     CodedBitstreamFragment   *au = &priv->current_access_unit;
 186     int err;
 187
 188     if (priv->aud_needed) {
 189         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 190         if (err < 0)
 191             goto fail;
 192         priv->aud_needed = 0;
 193     }
 194
 195     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_slice);
 196     if (err < 0)
 197         goto fail;
 198
 199     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 200 fail:
 201     ff_cbs_fragment_reset(au);
 202     return err;
 203 }
 204
 205 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 206                                                 VAAPIEncodePicture *pic,
 207                                                 int index, int *type,
 208                                                 char *data, size_t *data_len)
 209 {
 210     VAAPIEncodeH264Context *priv = avctx->priv_data;
 211     CodedBitstreamFragment   *au = &priv->current_access_unit;
 212     int err;
 213
 214     if (priv->sei_needed) {
 215         if (priv->aud_needed) {
 216             err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 217             if (err < 0)
 218                 goto fail;
 219             priv->aud_needed = 0;
 220         }
 221
 222         if (priv->sei_needed & SEI_IDENTIFIER) {
 223             err = ff_cbs_sei_add_message(priv->cbc, au, 1,
 224                                          SEI_TYPE_USER_DATA_UNREGISTERED,
 225                                          &priv->sei_identifier, NULL);
 226             if (err < 0)
 227                 goto fail;
 228         }
 229         if (priv->sei_needed & SEI_TIMING) {
 230             if (pic->type == PICTURE_TYPE_IDR) {
 231                 err = ff_cbs_sei_add_message(priv->cbc, au, 1,
 232                                              SEI_TYPE_BUFFERING_PERIOD,
 233                                              &priv->sei_buffering_period, NULL);
 234                 if (err < 0)
 235                     goto fail;
 236             }
 237             err = ff_cbs_sei_add_message(priv->cbc, au, 1,
 238                                          SEI_TYPE_PIC_TIMING,
 239                                          &priv->sei_pic_timing, NULL);
 240             if (err < 0)
 241                 goto fail;
 242         }
 243         if (priv->sei_needed & SEI_RECOVERY_POINT) {
 244             err = ff_cbs_sei_add_message(priv->cbc, au, 1,
 245                                          SEI_TYPE_RECOVERY_POINT,
 246                                          &priv->sei_recovery_point, NULL);
 247             if (err < 0)
 248                 goto fail;
 249         }
 250
 251         priv->sei_needed = 0;
 252
 253         err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 254         if (err < 0)
 255             goto fail;
 256
 257         ff_cbs_fragment_reset(au);
 258
 259         *type = VAEncPackedHeaderRawData;
 260         return 0;
 261
 262 #if !CONFIG_VAAPI_1
 263     } else if (priv->sei_cbr_workaround_needed) {
 264         // Insert a zero-length header using the old SEI type.  This is
 265         // required to avoid triggering broken behaviour on Intel platforms
 266         // in CBR mode where an invalid SEI message is generated by the
 267         // driver and inserted into the stream.
 268         *data_len = 0;
 269         *type = VAEncPackedHeaderH264_SEI;
 270         priv->sei_cbr_workaround_needed = 0;
 271         return 0;
 272 #endif
 273
 274     } else {
 275         return AVERROR_EOF;
 276     }
 277
 278 fail:
 279     ff_cbs_fragment_reset(au);
 280     return err;
 281 }
 282
 283 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 284 {
 285     VAAPIEncodeContext                *ctx = avctx->priv_data;
 286     VAAPIEncodeH264Context           *priv = avctx->priv_data;
 287     H264RawSPS                        *sps = &priv->raw_sps;
 288     H264RawPPS                        *pps = &priv->raw_pps;
 289     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 290     VAEncPictureParameterBufferH264  *vpic = ctx->codec_picture_params;
 291
 292     memset(sps, 0, sizeof(*sps));
 293     memset(pps, 0, sizeof(*pps));
 294
 295     sps->nal_unit_header.nal_ref_idc   = 3;
 296     sps->nal_unit_header.nal_unit_type = H264_NAL_SPS;
 297
 298     sps->profile_idc = avctx->profile & 0xff;
 299
 300     if (avctx->profile == FF_PROFILE_H264_CONSTRAINED_BASELINE ||
 301         avctx->profile == FF_PROFILE_H264_MAIN)
 302         sps->constraint_set1_flag = 1;
 303
 304     if (avctx->profile == FF_PROFILE_H264_HIGH)
 305         sps->constraint_set3_flag = ctx->gop_size == 1;
 306
 307     if (avctx->profile == FF_PROFILE_H264_MAIN ||
 308         avctx->profile == FF_PROFILE_H264_HIGH) {
 309         sps->constraint_set4_flag = 1;
 310         sps->constraint_set5_flag = ctx->b_per_p == 0;
 311     }
 312
 313     if (ctx->gop_size == 1)
 314         priv->dpb_frames = 0;
 315     else
 316         priv->dpb_frames = 1 + ctx->max_b_depth;
 317
 318     if (avctx->level != FF_LEVEL_UNKNOWN) {
 319         sps->level_idc = avctx->level;
 320     } else {
 321         const H264LevelDescriptor *level;
 322         int framerate;
 323
 324         if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
 325             framerate = avctx->framerate.num / avctx->framerate.den;
 326         else
 327             framerate = 0;
 328
 329         level = ff_h264_guess_level(sps->profile_idc,
 330                                     avctx->bit_rate,
 331                                     framerate,
 332                                     priv->mb_width  * 16,
 333                                     priv->mb_height * 16,
 334                                     priv->dpb_frames);
 335         if (level) {
 336             av_log(avctx, AV_LOG_VERBOSE, "Using level %s.\n", level->name);
 337             if (level->constraint_set3_flag)
 338                 sps->constraint_set3_flag = 1;
 339             sps->level_idc = level->level_idc;
 340         } else {
 341             av_log(avctx, AV_LOG_WARNING, "Stream will not conform "
 342                    "to any level: using level 6.2.\n");
 343             sps->level_idc = 62;
 344         }
 345     }
 346
 347     sps->seq_parameter_set_id = 0;
 348     sps->chroma_format_idc    = 1;
 349
 350     sps->log2_max_frame_num_minus4 = 4;
 351     sps->pic_order_cnt_type        = 0;
 352     sps->log2_max_pic_order_cnt_lsb_minus4 = 4;
 353
 354     sps->max_num_ref_frames = priv->dpb_frames;
 355
 356     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 357     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 358
 359     sps->frame_mbs_only_flag = 1;
 360     sps->direct_8x8_inference_flag = 1;
 361
 362     if (avctx->width  != 16 * priv->mb_width ||
 363         avctx->height != 16 * priv->mb_height) {
 364         sps->frame_cropping_flag = 1;
 365
 366         sps->frame_crop_left_offset   = 0;
 367         sps->frame_crop_right_offset  =
 368             (16 * priv->mb_width - avctx->width) / 2;
 369         sps->frame_crop_top_offset    = 0;
 370         sps->frame_crop_bottom_offset =
 371             (16 * priv->mb_height - avctx->height) / 2;
 372     } else {
 373         sps->frame_cropping_flag = 0;
 374     }
 375
 376     sps->vui_parameters_present_flag = 1;
 377
 378     if (avctx->sample_aspect_ratio.num != 0 &&
 379         avctx->sample_aspect_ratio.den != 0) {
 380         static const AVRational sar_idc[] = {
 381             {   0,  0 },
 382             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 383             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 384             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 385             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 386         };
 387         int num, den, i;
 388         av_reduce(&num, &den, avctx->sample_aspect_ratio.num,
 389                   avctx->sample_aspect_ratio.den, 65535);
 390         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 391             if (num == sar_idc[i].num &&
 392                 den == sar_idc[i].den) {
 393                 sps->vui.aspect_ratio_idc = i;
 394                 break;
 395             }
 396         }
 397         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 398             sps->vui.aspect_ratio_idc = 255;
 399             sps->vui.sar_width  = num;
 400             sps->vui.sar_height = den;
 401         }
 402         sps->vui.aspect_ratio_info_present_flag = 1;
 403     }
 404
 405     // Unspecified video format, from table E-2.
 406     sps->vui.video_format             = 5;
 407     sps->vui.video_full_range_flag    =
 408         avctx->color_range == AVCOL_RANGE_JPEG;
 409     sps->vui.colour_primaries         = avctx->color_primaries;
 410     sps->vui.transfer_characteristics = avctx->color_trc;
 411     sps->vui.matrix_coefficients      = avctx->colorspace;
 412     if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 413         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 414         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED)
 415         sps->vui.colour_description_present_flag = 1;
 416     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 417         sps->vui.colour_description_present_flag)
 418         sps->vui.video_signal_type_present_flag = 1;
 419
 420     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 421         sps->vui.chroma_loc_info_present_flag = 1;
 422         sps->vui.chroma_sample_loc_type_top_field    =
 423         sps->vui.chroma_sample_loc_type_bottom_field =
 424             avctx->chroma_sample_location - 1;
 425     }
 426
 427     sps->vui.timing_info_present_flag = 1;
 428     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 429         sps->vui.num_units_in_tick = avctx->framerate.den;
 430         sps->vui.time_scale        = 2 * avctx->framerate.num;
 431         sps->vui.fixed_frame_rate_flag = 1;
 432     } else {
 433         sps->vui.num_units_in_tick = avctx->time_base.num;
 434         sps->vui.time_scale        = 2 * avctx->time_base.den;
 435         sps->vui.fixed_frame_rate_flag = 0;
 436     }
 437
 438     if (priv->sei & SEI_TIMING) {
 439         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 440         H264RawSEIBufferingPeriod *bp = &priv->sei_buffering_period;
 441
 442         sps->vui.nal_hrd_parameters_present_flag = 1;
 443
 444         hrd->cpb_cnt_minus1 = 0;
 445
 446         // Try to scale these to a sensible range so that the
 447         // golomb encode of the value is not overlong.
 448         hrd->bit_rate_scale =
 449             av_clip_uintp2(av_log2(ctx->va_bit_rate) - 15 - 6, 4);
 450         hrd->bit_rate_value_minus1[0] =
 451             (ctx->va_bit_rate >> hrd->bit_rate_scale + 6) - 1;
 452
 453         hrd->cpb_size_scale =
 454             av_clip_uintp2(av_log2(ctx->hrd_params.buffer_size) - 15 - 4, 4);
 455         hrd->cpb_size_value_minus1[0] =
 456             (ctx->hrd_params.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 457
 458         // CBR mode as defined for the HRD cannot be achieved without filler
 459         // data, so this flag cannot be set even with VAAPI CBR modes.
 460         hrd->cbr_flag[0] = 0;
 461
 462         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 463         hrd->cpb_removal_delay_length_minus1         = 23;
 464         hrd->dpb_output_delay_length_minus1          = 7;
 465         hrd->time_offset_length                      = 0;
 466
 467         bp->seq_parameter_set_id = sps->seq_parameter_set_id;
 468
 469         // This calculation can easily overflow 32 bits.
 470         bp->nal.initial_cpb_removal_delay[0] = 90000 *
 471             (uint64_t)ctx->hrd_params.initial_buffer_fullness /
 472             ctx->hrd_params.buffer_size;
 473         bp->nal.initial_cpb_removal_delay_offset[0] = 0;
 474     } else {
 475         sps->vui.nal_hrd_parameters_present_flag = 0;
 476         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 477     }
 478
 479     sps->vui.bitstream_restriction_flag    = 1;
 480     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 481     sps->vui.log2_max_mv_length_horizontal = 15;
 482     sps->vui.log2_max_mv_length_vertical   = 15;
 483     sps->vui.max_num_reorder_frames        = ctx->max_b_depth;
 484     sps->vui.max_dec_frame_buffering       = ctx->max_b_depth + 1;
 485
 486     pps->nal_unit_header.nal_ref_idc = 3;
 487     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 488
 489     pps->pic_parameter_set_id = 0;
 490     pps->seq_parameter_set_id = 0;
 491
 492     pps->entropy_coding_mode_flag =
 493         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 494           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 495           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 496     if (!priv->coder && pps->entropy_coding_mode_flag)
 497         pps->entropy_coding_mode_flag = 0;
 498
 499     pps->num_ref_idx_l0_default_active_minus1 = 0;
 500     pps->num_ref_idx_l1_default_active_minus1 = 0;
 501
 502     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 503
 504     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 505         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 506         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 507         pps->more_rbsp_data = 0;
 508     } else {
 509         pps->more_rbsp_data = 1;
 510
 511         pps->transform_8x8_mode_flag = 1;
 512     }
 513
 514     *vseq = (VAEncSequenceParameterBufferH264) {
 515         .seq_parameter_set_id = sps->seq_parameter_set_id,
 516         .level_idc        = sps->level_idc,
 517         .intra_period     = ctx->gop_size,
 518         .intra_idr_period = ctx->gop_size,
 519         .ip_period        = ctx->b_per_p + 1,
 520
 521         .bits_per_second       = ctx->va_bit_rate,
 522         .max_num_ref_frames    = sps->max_num_ref_frames,
 523         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 524         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 525
 526         .seq_fields.bits = {
 527             .chroma_format_idc                 = sps->chroma_format_idc,
 528             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 529             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 530             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 531             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 532             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 533             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 534             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 535             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 536         },
 537
 538         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 539         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 540
 541         .frame_cropping_flag      = sps->frame_cropping_flag,
 542         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 543         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 544         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 545         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 546
 547         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 548
 549         .vui_fields.bits = {
 550             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 551             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 552             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 553             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 554             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 555         },
 556
 557         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 558         .sar_width         = sps->vui.sar_width,
 559         .sar_height        = sps->vui.sar_height,
 560         .num_units_in_tick = sps->vui.num_units_in_tick,
 561         .time_scale        = sps->vui.time_scale,
 562     };
 563
 564     *vpic = (VAEncPictureParameterBufferH264) {
 565         .CurrPic = {
 566             .picture_id = VA_INVALID_ID,
 567             .flags      = VA_PICTURE_H264_INVALID,
 568         },
 569
 570         .coded_buf = VA_INVALID_ID,
 571
 572         .pic_parameter_set_id = pps->pic_parameter_set_id,
 573         .seq_parameter_set_id = pps->seq_parameter_set_id,
 574
 575         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 576         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 577         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 578
 579         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 580         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 581
 582         .pic_fields.bits = {
 583             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 584             .weighted_pred_flag              = pps->weighted_pred_flag,
 585             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 586             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 587             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 588             .deblocking_filter_control_present_flag =
 589                 pps->deblocking_filter_control_present_flag,
 590             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 591             .pic_order_present_flag          =
 592                 pps->bottom_field_pic_order_in_frame_present_flag,
 593             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 594         },
 595     };
 596
 597     return 0;
 598 }
 599
 600 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 601                                                  VAAPIEncodePicture *pic)
 602 {
 603     VAAPIEncodeContext               *ctx = avctx->priv_data;
 604     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 605     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 606     VAAPIEncodePicture              *prev = pic->prev;
 607     VAAPIEncodeH264Picture         *hprev = prev ? prev->priv_data : NULL;
 608     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 609     int i;
 610
 611     if (pic->type == PICTURE_TYPE_IDR) {
 612         av_assert0(pic->display_order == pic->encode_order);
 613
 614         hpic->frame_num      = 0;
 615         hpic->last_idr_frame = pic->display_order;
 616         hpic->idr_pic_id     = hprev ? hprev->idr_pic_id + 1 : 0;
 617
 618         hpic->primary_pic_type = 0;
 619         hpic->slice_type       = 7;
 620     } else {
 621         av_assert0(prev);
 622
 623         hpic->frame_num = hprev->frame_num + prev->is_reference;
 624
 625         hpic->last_idr_frame = hprev->last_idr_frame;
 626         hpic->idr_pic_id     = hprev->idr_pic_id;
 627
 628         if (pic->type == PICTURE_TYPE_I) {
 629             hpic->slice_type       = 7;
 630             hpic->primary_pic_type = 0;
 631         } else if (pic->type == PICTURE_TYPE_P) {
 632             hpic->slice_type       = 5;
 633             hpic->primary_pic_type = 1;
 634         } else {
 635             hpic->slice_type       = 6;
 636             hpic->primary_pic_type = 2;
 637         }
 638     }
 639     hpic->pic_order_cnt = pic->display_order - hpic->last_idr_frame;
 640     hpic->dpb_delay     = pic->display_order - pic->encode_order + ctx->max_b_depth;
 641     hpic->cpb_delay     = pic->encode_order - hpic->last_idr_frame;
 642
 643     if (priv->aud) {
 644         priv->aud_needed = 1;
 645         priv->raw_aud = (H264RawAUD) {
 646             .nal_unit_header = {
 647                 .nal_unit_type = H264_NAL_AUD,
 648             },
 649             .primary_pic_type  = hpic->primary_pic_type,
 650         };
 651     } else {
 652         priv->aud_needed = 0;
 653     }
 654
 655     priv->sei_needed = 0;
 656
 657     if (priv->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 658         priv->sei_needed |= SEI_IDENTIFIER;
 659 #if !CONFIG_VAAPI_1
 660     if (ctx->va_rc_mode == VA_RC_CBR)
 661         priv->sei_cbr_workaround_needed = 1;
 662 #endif
 663
 664     if (priv->sei & SEI_TIMING) {
 665         priv->sei_pic_timing = (H264RawSEIPicTiming) {
 666             .cpb_removal_delay = 2 * hpic->cpb_delay,
 667             .dpb_output_delay  = 2 * hpic->dpb_delay,
 668         };
 669
 670         priv->sei_needed |= SEI_TIMING;
 671     }
 672
 673     if (priv->sei & SEI_RECOVERY_POINT && pic->type == PICTURE_TYPE_I) {
 674         priv->sei_recovery_point = (H264RawSEIRecoveryPoint) {
 675             .recovery_frame_cnt = 0,
 676             .exact_match_flag   = 1,
 677             .broken_link_flag   = ctx->b_per_p > 0,
 678         };
 679
 680         priv->sei_needed |= SEI_RECOVERY_POINT;
 681     }
 682
 683     vpic->CurrPic = (VAPictureH264) {
 684         .picture_id          = pic->recon_surface,
 685         .frame_idx           = hpic->frame_num,
 686         .flags               = 0,
 687         .TopFieldOrderCnt    = hpic->pic_order_cnt,
 688         .BottomFieldOrderCnt = hpic->pic_order_cnt,
 689     };
 690
 691     for (i = 0; i < pic->nb_refs; i++) {
 692         VAAPIEncodePicture      *ref = pic->refs[i];
 693         VAAPIEncodeH264Picture *href;
 694
 695         av_assert0(ref && ref->encode_order < pic->encode_order);
 696         href = ref->priv_data;
 697
 698         vpic->ReferenceFrames[i] = (VAPictureH264) {
 699             .picture_id          = ref->recon_surface,
 700             .frame_idx           = href->frame_num,
 701             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 702             .TopFieldOrderCnt    = href->pic_order_cnt,
 703             .BottomFieldOrderCnt = href->pic_order_cnt,
 704         };
 705     }
 706     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 707         vpic->ReferenceFrames[i] = (VAPictureH264) {
 708             .picture_id = VA_INVALID_ID,
 709             .flags      = VA_PICTURE_H264_INVALID,
 710         };
 711     }
 712
 713     vpic->coded_buf = pic->output_buffer;
 714
 715     vpic->frame_num = hpic->frame_num;
 716
 717     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 718     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 719
 720     return 0;
 721 }
 722
 723 static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
 724                                                    VAAPIEncodePicture *pic,
 725                                                    VAAPIEncodePicture **rpl0,
 726                                                    VAAPIEncodePicture **rpl1,
 727                                                    int *rpl_size)
 728 {
 729     VAAPIEncodePicture *prev;
 730     VAAPIEncodeH264Picture *hp, *hn, *hc;
 731     int i, j, n = 0;
 732
 733     prev = pic->prev;
 734     av_assert0(prev);
 735     hp = pic->priv_data;
 736
 737     for (i = 0; i < pic->prev->nb_dpb_pics; i++) {
 738         hn = prev->dpb[i]->priv_data;
 739         av_assert0(hn->frame_num < hp->frame_num);
 740
 741         if (pic->type == PICTURE_TYPE_P) {
 742             for (j = n; j > 0; j--) {
 743                 hc = rpl0[j - 1]->priv_data;
 744                 av_assert0(hc->frame_num != hn->frame_num);
 745                 if (hc->frame_num > hn->frame_num)
 746                     break;
 747                 rpl0[j] = rpl0[j - 1];
 748             }
 749             rpl0[j] = prev->dpb[i];
 750
 751         } else if (pic->type == PICTURE_TYPE_B) {
 752             for (j = n; j > 0; j--) {
 753                 hc = rpl0[j - 1]->priv_data;
 754                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 755                 if (hc->pic_order_cnt < hp->pic_order_cnt) {
 756                     if (hn->pic_order_cnt > hp->pic_order_cnt ||
 757                         hn->pic_order_cnt < hc->pic_order_cnt)
 758                         break;
 759                 } else {
 760                     if (hn->pic_order_cnt > hc->pic_order_cnt)
 761                         break;
 762                 }
 763                 rpl0[j] = rpl0[j - 1];
 764             }
 765             rpl0[j] = prev->dpb[i];
 766
 767             for (j = n; j > 0; j--) {
 768                 hc = rpl1[j - 1]->priv_data;
 769                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 770                 if (hc->pic_order_cnt > hp->pic_order_cnt) {
 771                     if (hn->pic_order_cnt < hp->pic_order_cnt ||
 772                         hn->pic_order_cnt > hc->pic_order_cnt)
 773                         break;
 774                 } else {
 775                     if (hn->pic_order_cnt < hc->pic_order_cnt)
 776                         break;
 777                 }
 778                 rpl1[j] = rpl1[j - 1];
 779             }
 780             rpl1[j] = prev->dpb[i];
 781         }
 782
 783         ++n;
 784     }
 785
 786     if (pic->type == PICTURE_TYPE_B) {
 787         for (i = 0; i < n; i++) {
 788             if (rpl0[i] != rpl1[i])
 789                 break;
 790         }
 791         if (i == n)
 792             FFSWAP(VAAPIEncodePicture*, rpl1[0], rpl1[1]);
 793     }
 794
 795     if (pic->type == PICTURE_TYPE_P ||
 796         pic->type == PICTURE_TYPE_B) {
 797         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList0 for fn=%d/poc=%d:",
 798                hp->frame_num, hp->pic_order_cnt);
 799         for (i = 0; i < n; i++) {
 800             hn = rpl0[i]->priv_data;
 801             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 802                    hn->frame_num, hn->pic_order_cnt);
 803         }
 804         av_log(avctx, AV_LOG_DEBUG, "\n");
 805     }
 806     if (pic->type == PICTURE_TYPE_B) {
 807         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList1 for fn=%d/poc=%d:",
 808                hp->frame_num, hp->pic_order_cnt);
 809         for (i = 0; i < n; i++) {
 810             hn = rpl1[i]->priv_data;
 811             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 812                    hn->frame_num, hn->pic_order_cnt);
 813         }
 814         av_log(avctx, AV_LOG_DEBUG, "\n");
 815     }
 816
 817     *rpl_size = n;
 818 }
 819
 820 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 821                                                VAAPIEncodePicture *pic,
 822                                                VAAPIEncodeSlice *slice)
 823 {
 824     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 825     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 826     VAAPIEncodePicture              *prev = pic->prev;
 827     H264RawSPS                       *sps = &priv->raw_sps;
 828     H264RawPPS                       *pps = &priv->raw_pps;
 829     H264RawSliceHeader                *sh = &priv->raw_slice.header;
 830     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 831     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 832     int i, j;
 833
 834     if (pic->type == PICTURE_TYPE_IDR) {
 835         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 836         sh->nal_unit_header.nal_ref_idc   = 3;
 837     } else {
 838         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 839         sh->nal_unit_header.nal_ref_idc   = pic->is_reference;
 840     }
 841
 842     sh->first_mb_in_slice = slice->block_start;
 843     sh->slice_type        = hpic->slice_type;
 844
 845     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 846
 847     sh->frame_num = hpic->frame_num &
 848         ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 849     sh->idr_pic_id = hpic->idr_pic_id;
 850     sh->pic_order_cnt_lsb = hpic->pic_order_cnt &
 851         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 852
 853     sh->direct_spatial_mv_pred_flag = 1;
 854
 855     if (pic->type == PICTURE_TYPE_B)
 856         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 857     else if (pic->type == PICTURE_TYPE_P)
 858         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 859     else
 860         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 861
 862     if (pic->is_reference && pic->type != PICTURE_TYPE_IDR) {
 863         VAAPIEncodePicture *discard_list[MAX_DPB_SIZE];
 864         int discard = 0, keep = 0;
 865
 866         // Discard everything which is in the DPB of the previous frame but
 867         // not in the DPB of this one.
 868         for (i = 0; i < prev->nb_dpb_pics; i++) {
 869             for (j = 0; j < pic->nb_dpb_pics; j++) {
 870                 if (prev->dpb[i] == pic->dpb[j])
 871                     break;
 872             }
 873             if (j == pic->nb_dpb_pics) {
 874                 discard_list[discard] = prev->dpb[i];
 875                 ++discard;
 876             } else {
 877                 ++keep;
 878             }
 879         }
 880         av_assert0(keep <= priv->dpb_frames);
 881
 882         if (discard == 0) {
 883             sh->adaptive_ref_pic_marking_mode_flag = 0;
 884         } else {
 885             sh->adaptive_ref_pic_marking_mode_flag = 1;
 886             for (i = 0; i < discard; i++) {
 887                 VAAPIEncodeH264Picture *old = discard_list[i]->priv_data;
 888                 av_assert0(old->frame_num < hpic->frame_num);
 889                 sh->mmco[i].memory_management_control_operation = 1;
 890                 sh->mmco[i].difference_of_pic_nums_minus1 =
 891                     hpic->frame_num - old->frame_num - 1;
 892             }
 893             sh->mmco[i].memory_management_control_operation = 0;
 894         }
 895     }
 896
 897     // If the intended references are not the first entries of RefPicListN
 898     // by default, use ref-pic-list-modification to move them there.
 899     if (pic->type == PICTURE_TYPE_P || pic->type == PICTURE_TYPE_B) {
 900         VAAPIEncodePicture *def_l0[MAX_DPB_SIZE], *def_l1[MAX_DPB_SIZE];
 901         VAAPIEncodeH264Picture *href;
 902         int n;
 903
 904         vaapi_encode_h264_default_ref_pic_list(avctx, pic,
 905                                                def_l0, def_l1, &n);
 906
 907         if (pic->type == PICTURE_TYPE_P) {
 908             int need_rplm = 0;
 909             for (i = 0; i < pic->nb_refs; i++) {
 910                 av_assert0(pic->refs[i]);
 911                 if (pic->refs[i] != def_l0[i])
 912                     need_rplm = 1;
 913             }
 914
 915             sh->ref_pic_list_modification_flag_l0 = need_rplm;
 916             if (need_rplm) {
 917                 int pic_num = hpic->frame_num;
 918                 for (i = 0; i < pic->nb_refs; i++) {
 919                     href = pic->refs[i]->priv_data;
 920                     av_assert0(href->frame_num != pic_num);
 921                     if (href->frame_num < pic_num) {
 922                         sh->rplm_l0[i].modification_of_pic_nums_idc = 0;
 923                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 924                             pic_num - href->frame_num - 1;
 925                     } else {
 926                         sh->rplm_l0[i].modification_of_pic_nums_idc = 1;
 927                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 928                             href->frame_num - pic_num - 1;
 929                     }
 930                     pic_num = href->frame_num;
 931                 }
 932                 sh->rplm_l0[i].modification_of_pic_nums_idc = 3;
 933             }
 934
 935         } else {
 936             int need_rplm_l0 = 0, need_rplm_l1 = 0;
 937             int n0 = 0, n1 = 0;
 938             for (i = 0; i < pic->nb_refs; i++) {
 939                 av_assert0(pic->refs[i]);
 940                 href = pic->refs[i]->priv_data;
 941                 av_assert0(href->pic_order_cnt != hpic->pic_order_cnt);
 942                 if (href->pic_order_cnt < hpic->pic_order_cnt) {
 943                     if (pic->refs[i] != def_l0[n0])
 944                         need_rplm_l0 = 1;
 945                     ++n0;
 946                 } else {
 947                     if (pic->refs[i] != def_l1[n1])
 948                         need_rplm_l1 = 1;
 949                     ++n1;
 950                 }
 951             }
 952
 953             sh->ref_pic_list_modification_flag_l0 = need_rplm_l0;
 954             if (need_rplm_l0) {
 955                 int pic_num = hpic->frame_num;
 956                 for (i = j = 0; i < pic->nb_refs; i++) {
 957                     href = pic->refs[i]->priv_data;
 958                     if (href->pic_order_cnt > hpic->pic_order_cnt)
 959                         continue;
 960                     av_assert0(href->frame_num != pic_num);
 961                     if (href->frame_num < pic_num) {
 962                         sh->rplm_l0[j].modification_of_pic_nums_idc = 0;
 963                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 964                             pic_num - href->frame_num - 1;
 965                     } else {
 966                         sh->rplm_l0[j].modification_of_pic_nums_idc = 1;
 967                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 968                             href->frame_num - pic_num - 1;
 969                     }
 970                     pic_num = href->frame_num;
 971                     ++j;
 972                 }
 973                 av_assert0(j == n0);
 974                 sh->rplm_l0[j].modification_of_pic_nums_idc = 3;
 975             }
 976
 977             sh->ref_pic_list_modification_flag_l1 = need_rplm_l1;
 978             if (need_rplm_l1) {
 979                 int pic_num = hpic->frame_num;
 980                 for (i = j = 0; i < pic->nb_refs; i++) {
 981                     href = pic->refs[i]->priv_data;
 982                     if (href->pic_order_cnt < hpic->pic_order_cnt)
 983                         continue;
 984                     av_assert0(href->frame_num != pic_num);
 985                     if (href->frame_num < pic_num) {
 986                         sh->rplm_l1[j].modification_of_pic_nums_idc = 0;
 987                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
 988                             pic_num - href->frame_num - 1;
 989                     } else {
 990                         sh->rplm_l1[j].modification_of_pic_nums_idc = 1;
 991                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
 992                             href->frame_num - pic_num - 1;
 993                     }
 994                     pic_num = href->frame_num;
 995                     ++j;
 996                 }
 997                 av_assert0(j == n1);
 998                 sh->rplm_l1[j].modification_of_pic_nums_idc = 3;
 999             }
1000         }
1001     }
1002
1003     vslice->macroblock_address = slice->block_start;
1004     vslice->num_macroblocks    = slice->block_size;
1005
1006     vslice->macroblock_info = VA_INVALID_ID;
1007
1008     vslice->slice_type           = sh->slice_type % 5;
1009     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
1010     vslice->idr_pic_id           = sh->idr_pic_id;
1011
1012     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
1013
1014     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
1015
1016     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1017         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1018         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1019         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1020         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1021     }
1022
1023     av_assert0(pic->nb_refs <= 2);
1024     if (pic->nb_refs >= 1) {
1025         // Backward reference for P- or B-frame.
1026         av_assert0(pic->type == PICTURE_TYPE_P ||
1027                    pic->type == PICTURE_TYPE_B);
1028         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1029     }
1030     if (pic->nb_refs >= 2) {
1031         // Forward reference for B-frame.
1032         av_assert0(pic->type == PICTURE_TYPE_B);
1033         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1034     }
1035
1036     vslice->slice_qp_delta = sh->slice_qp_delta;
1037
1038     return 0;
1039 }
1040
1041 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
1042 {
1043     VAAPIEncodeContext      *ctx = avctx->priv_data;
1044     VAAPIEncodeH264Context *priv = avctx->priv_data;
1045     int err;
1046
1047     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
1048     if (err < 0)
1049         return err;
1050
1051     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
1052     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
1053
1054     if (ctx->va_rc_mode == VA_RC_CQP) {
1055         priv->fixed_qp_p = av_clip(ctx->rc_quality, 1, 51);
1056         if (avctx->i_quant_factor > 0.0)
1057             priv->fixed_qp_idr =
1058                 av_clip((avctx->i_quant_factor * priv->fixed_qp_p +
1059                          avctx->i_quant_offset) + 0.5, 1, 51);
1060         else
1061             priv->fixed_qp_idr = priv->fixed_qp_p;
1062         if (avctx->b_quant_factor > 0.0)
1063             priv->fixed_qp_b =
1064                 av_clip((avctx->b_quant_factor * priv->fixed_qp_p +
1065                          avctx->b_quant_offset) + 0.5, 1, 51);
1066         else
1067             priv->fixed_qp_b = priv->fixed_qp_p;
1068
1069         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1070                "%d / %d / %d for IDR- / P- / B-frames.\n",
1071                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1072
1073     } else {
1074         // These still need to be  set for pic_init_qp/slice_qp_delta.
1075         priv->fixed_qp_idr = 26;
1076         priv->fixed_qp_p   = 26;
1077         priv->fixed_qp_b   = 26;
1078     }
1079
1080     if (!ctx->rc_mode->hrd) {
1081         // Timing SEI requires a mode respecting HRD parameters.
1082         priv->sei &= ~SEI_TIMING;
1083     }
1084
1085     if (priv->sei & SEI_IDENTIFIER) {
1086         const char *lavc  = LIBAVCODEC_IDENT;
1087         const char *vaapi = VA_VERSION_S;
1088         const char *driver;
1089         int len;
1090
1091         memcpy(priv->sei_identifier.uuid_iso_iec_11578,
1092                vaapi_encode_h264_sei_identifier_uuid,
1093                sizeof(priv->sei_identifier.uuid_iso_iec_11578));
1094
1095         driver = vaQueryVendorString(ctx->hwctx->display);
1096         if (!driver)
1097             driver = "unknown driver";
1098
1099         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
1100         if (len >= 0) {
1101             priv->sei_identifier_string = av_malloc(len + 1);
1102             if (!priv->sei_identifier_string)
1103                 return AVERROR(ENOMEM);
1104
1105             snprintf(priv->sei_identifier_string, len + 1,
1106                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
1107
1108             priv->sei_identifier.data        = priv->sei_identifier_string;
1109             priv->sei_identifier.data_length = len + 1;
1110         }
1111     }
1112
1113     ctx->roi_quant_range = 51 + 6 * (ctx->profile->depth - 8);
1114
1115     return 0;
1116 }
1117
1118 static const VAAPIEncodeProfile vaapi_encode_h264_profiles[] = {
1119     { FF_PROFILE_H264_HIGH, 8, 3, 1, 1, VAProfileH264High },
1120     { FF_PROFILE_H264_MAIN, 8, 3, 1, 1, VAProfileH264Main },
1121     { FF_PROFILE_H264_CONSTRAINED_BASELINE,
1122                             8, 3, 1, 1, VAProfileH264ConstrainedBaseline },
1123     { FF_PROFILE_UNKNOWN }
1124 };
1125
1126 static const VAAPIEncodeType vaapi_encode_type_h264 = {
1127     .profiles              = vaapi_encode_h264_profiles,
1128
1129     .flags                 = FLAG_SLICE_CONTROL |
1130                              FLAG_B_PICTURES |
1131                              FLAG_B_PICTURE_REFERENCES |
1132                              FLAG_NON_IDR_KEY_PICTURES,
1133
1134     .default_quality       = 20,
1135
1136     .configure             = &vaapi_encode_h264_configure,
1137
1138     .picture_priv_data_size = sizeof(VAAPIEncodeH264Picture),
1139
1140     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1141     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1142
1143     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1144     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1145
1146     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1147     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1148
1149     .sequence_header_type  = VAEncPackedHeaderSequence,
1150     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1151
1152     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1153     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1154
1155     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1156 };
1157
1158 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1159 {
1160     VAAPIEncodeContext      *ctx = avctx->priv_data;
1161     VAAPIEncodeH264Context *priv = avctx->priv_data;
1162
1163     ctx->codec = &vaapi_encode_type_h264;
1164
1165     if (avctx->profile == FF_PROFILE_UNKNOWN)
1166         avctx->profile = priv->profile;
1167     if (avctx->level == FF_LEVEL_UNKNOWN)
1168         avctx->level = priv->level;
1169     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
1170         avctx->compression_level = priv->quality;
1171
1172     // Reject unsupported profiles.
1173     switch (avctx->profile) {
1174     case FF_PROFILE_H264_BASELINE:
1175         av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
1176                "supported, using constrained baseline profile instead.\n");
1177         avctx->profile = FF_PROFILE_H264_CONSTRAINED_BASELINE;
1178         break;
1179     case FF_PROFILE_H264_EXTENDED:
1180         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1181                "is not supported.\n");
1182         return AVERROR_PATCHWELCOME;
1183     case FF_PROFILE_H264_HIGH_10:
1184     case FF_PROFILE_H264_HIGH_10_INTRA:
1185         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1186                "are not supported.\n");
1187         return AVERROR_PATCHWELCOME;
1188     case FF_PROFILE_H264_HIGH_422:
1189     case FF_PROFILE_H264_HIGH_422_INTRA:
1190     case FF_PROFILE_H264_HIGH_444:
1191     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1192     case FF_PROFILE_H264_HIGH_444_INTRA:
1193     case FF_PROFILE_H264_CAVLC_444:
1194         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1195                "are not supported.\n");
1196         return AVERROR_PATCHWELCOME;
1197     }
1198
1199     if (avctx->level != FF_LEVEL_UNKNOWN && avctx->level & ~0xff) {
1200         av_log(avctx, AV_LOG_ERROR, "Invalid level %d: must fit "
1201                "in 8-bit unsigned integer.\n", avctx->level);
1202         return AVERROR(EINVAL);
1203     }
1204
1205     ctx->desired_packed_headers =
1206         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
1207         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
1208         VA_ENC_PACKED_HEADER_MISC;      // SEI.
1209
1210     ctx->surface_width  = FFALIGN(avctx->width,  16);
1211     ctx->surface_height = FFALIGN(avctx->height, 16);
1212
1213     ctx->slice_block_height = ctx->slice_block_width = 16;
1214
1215     if (priv->qp > 0)
1216         ctx->explicit_qp = priv->qp;
1217
1218     return ff_vaapi_encode_init(avctx);
1219 }
1220
1221 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
1222 {
1223     VAAPIEncodeH264Context *priv = avctx->priv_data;
1224
1225     ff_cbs_fragment_free(&priv->current_access_unit);
1226     ff_cbs_close(&priv->cbc);
1227     av_freep(&priv->sei_identifier_string);
1228
1229     return ff_vaapi_encode_close(avctx);
1230 }
1231
1232 #define OFFSET(x) offsetof(VAAPIEncodeH264Context, x)
1233 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1234 static const AVOption vaapi_encode_h264_options[] = {
1235     VAAPI_ENCODE_COMMON_OPTIONS,
1236     VAAPI_ENCODE_RC_OPTIONS,
1237
1238     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1239       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 52, FLAGS },
1240     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1241       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
1242     { "coder", "Entropy coder type",
1243       OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
1244         { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1245         { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1246         { "vlc",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1247         { "ac",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1248
1249     { "aud", "Include AUD",
1250       OFFSET(aud), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1251
1252     { "sei", "Set SEI to include",
1253       OFFSET(sei), AV_OPT_TYPE_FLAGS,
1254       { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT },
1255       0, INT_MAX, FLAGS, "sei" },
1256     { "identifier", "Include encoder version identifier",
1257       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
1258       INT_MIN, INT_MAX, FLAGS, "sei" },
1259     { "timing", "Include timing parameters (buffering_period and pic_timing)",
1260       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
1261       INT_MIN, INT_MAX, FLAGS, "sei" },
1262     { "recovery_point", "Include recovery points where appropriate",
1263       0, AV_OPT_TYPE_CONST, { .i64 = SEI_RECOVERY_POINT },
1264       INT_MIN, INT_MAX, FLAGS, "sei" },
1265
1266     { "profile", "Set profile (profile_idc and constraint_set*_flag)",
1267       OFFSET(profile), AV_OPT_TYPE_INT,
1268       { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 0xffff, FLAGS, "profile" },
1269
1270 #define PROFILE(name, value)  name, NULL, 0, AV_OPT_TYPE_CONST, \
1271       { .i64 = value }, 0, 0, FLAGS, "profile"
1272     { PROFILE("constrained_baseline", FF_PROFILE_H264_CONSTRAINED_BASELINE) },
1273     { PROFILE("main",                 FF_PROFILE_H264_MAIN) },
1274     { PROFILE("high",                 FF_PROFILE_H264_HIGH) },
1275 #undef PROFILE
1276
1277     { "level", "Set level (level_idc)",
1278       OFFSET(level), AV_OPT_TYPE_INT,
1279       { .i64 = FF_LEVEL_UNKNOWN }, FF_LEVEL_UNKNOWN, 0xff, FLAGS, "level" },
1280
1281 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
1282       { .i64 = value }, 0, 0, FLAGS, "level"
1283     { LEVEL("1",   10) },
1284     { LEVEL("1.1", 11) },
1285     { LEVEL("1.2", 12) },
1286     { LEVEL("1.3", 13) },
1287     { LEVEL("2",   20) },
1288     { LEVEL("2.1", 21) },
1289     { LEVEL("2.2", 22) },
1290     { LEVEL("3",   30) },
1291     { LEVEL("3.1", 31) },
1292     { LEVEL("3.2", 32) },
1293     { LEVEL("4",   40) },
1294     { LEVEL("4.1", 41) },
1295     { LEVEL("4.2", 42) },
1296     { LEVEL("5",   50) },
1297     { LEVEL("5.1", 51) },
1298     { LEVEL("5.2", 52) },
1299     { LEVEL("6",   60) },
1300     { LEVEL("6.1", 61) },
1301     { LEVEL("6.2", 62) },
1302 #undef LEVEL
1303
1304     { NULL },
1305 };
1306
1307 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1308     { "b",              "0"   },
1309     { "bf",             "2"   },
1310     { "g",              "120" },
1311     { "i_qfactor",      "1"   },
1312     { "i_qoffset",      "0"   },
1313     { "b_qfactor",      "6/5" },
1314     { "b_qoffset",      "0"   },
1315     { "qmin",           "-1"  },
1316     { "qmax",           "-1"  },
1317     { NULL },
1318 };
1319
1320 static const AVClass vaapi_encode_h264_class = {
1321     .class_name = "h264_vaapi",
1322     .item_name  = av_default_item_name,
1323     .option     = vaapi_encode_h264_options,
1324     .version    = LIBAVUTIL_VERSION_INT,
1325 };
1326
1327 const AVCodec ff_h264_vaapi_encoder = {
1328     .name           = "h264_vaapi",
1329     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1330     .type           = AVMEDIA_TYPE_VIDEO,
1331     .id             = AV_CODEC_ID_H264,
1332     .priv_data_size = sizeof(VAAPIEncodeH264Context),
1333     .init           = &vaapi_encode_h264_init,
1334     .receive_packet = &ff_vaapi_encode_receive_packet,
1335     .close          = &vaapi_encode_h264_close,
1336     .priv_class     = &vaapi_encode_h264_class,
1337     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE |
1338                       AV_CODEC_CAP_DR1,
1339     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
1340     .defaults       = vaapi_encode_h264_defaults,
1341     .pix_fmts = (const enum AVPixelFormat[]) {
1342         AV_PIX_FMT_VAAPI,
1343         AV_PIX_FMT_NONE,
1344     },
1345     .hw_configs     = ff_vaapi_encode_hw_configs,
1346     .wrapper_name   = "vaapi",
1347 };