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     H264RawSEI   raw_sei;
  94     H264RawSlice raw_slice;
  95
  96     H264RawSEIBufferingPeriod      sei_buffering_period;
  97     H264RawSEIPicTiming            sei_pic_timing;
  98     H264RawSEIRecoveryPoint        sei_recovery_point;
  99     H264RawSEIUserDataUnregistered sei_identifier;
 100     char                          *sei_identifier_string;
 101
 102     int aud_needed;
 103     int sei_needed;
 104     int sei_cbr_workaround_needed;
 105 } VAAPIEncodeH264Context;
 106
 107
 108 static int vaapi_encode_h264_write_access_unit(AVCodecContext *avctx,
 109                                                char *data, size_t *data_len,
 110                                                CodedBitstreamFragment *au)
 111 {
 112     VAAPIEncodeH264Context *priv = avctx->priv_data;
 113     int err;
 114
 115     err = ff_cbs_write_fragment_data(priv->cbc, au);
 116     if (err < 0) {
 117         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");
 118         return err;
 119     }
 120
 121     if (*data_len < 8 * au->data_size - au->data_bit_padding) {
 122         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "
 123                "%zu < %zu.\n", *data_len,
 124                8 * au->data_size - au->data_bit_padding);
 125         return AVERROR(ENOSPC);
 126     }
 127
 128     memcpy(data, au->data, au->data_size);
 129     *data_len = 8 * au->data_size - au->data_bit_padding;
 130
 131     return 0;
 132 }
 133
 134 static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
 135                                      CodedBitstreamFragment *au,
 136                                      void *nal_unit)
 137 {
 138     VAAPIEncodeH264Context *priv = avctx->priv_data;
 139     H264RawNALUnitHeader *header = nal_unit;
 140     int err;
 141
 142     err = ff_cbs_insert_unit_content(priv->cbc, au, -1,
 143                                      header->nal_unit_type, nal_unit, NULL);
 144     if (err < 0) {
 145         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
 146                "type = %d.\n", header->nal_unit_type);
 147         return err;
 148     }
 149
 150     return 0;
 151 }
 152
 153 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 154                                                    char *data, size_t *data_len)
 155 {
 156     VAAPIEncodeH264Context *priv = avctx->priv_data;
 157     CodedBitstreamFragment   *au = &priv->current_access_unit;
 158     int err;
 159
 160     if (priv->aud_needed) {
 161         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 162         if (err < 0)
 163             goto fail;
 164         priv->aud_needed = 0;
 165     }
 166
 167     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_sps);
 168     if (err < 0)
 169         goto fail;
 170
 171     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_pps);
 172     if (err < 0)
 173         goto fail;
 174
 175     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 176 fail:
 177     ff_cbs_fragment_reset(priv->cbc, au);
 178     return err;
 179 }
 180
 181 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 182                                                 VAAPIEncodePicture *pic,
 183                                                 VAAPIEncodeSlice *slice,
 184                                                 char *data, size_t *data_len)
 185 {
 186     VAAPIEncodeH264Context *priv = avctx->priv_data;
 187     CodedBitstreamFragment   *au = &priv->current_access_unit;
 188     int err;
 189
 190     if (priv->aud_needed) {
 191         err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 192         if (err < 0)
 193             goto fail;
 194         priv->aud_needed = 0;
 195     }
 196
 197     err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_slice);
 198     if (err < 0)
 199         goto fail;
 200
 201     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 202 fail:
 203     ff_cbs_fragment_reset(priv->cbc, au);
 204     return err;
 205 }
 206
 207 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 208                                                 VAAPIEncodePicture *pic,
 209                                                 int index, int *type,
 210                                                 char *data, size_t *data_len)
 211 {
 212     VAAPIEncodeH264Context *priv = avctx->priv_data;
 213     CodedBitstreamFragment   *au = &priv->current_access_unit;
 214     int err, i;
 215
 216     if (priv->sei_needed) {
 217         H264RawSEI *sei = &priv->raw_sei;
 218
 219         if (priv->aud_needed) {
 220             err = vaapi_encode_h264_add_nal(avctx, au, &priv->raw_aud);
 221             if (err < 0)
 222                 goto fail;
 223             priv->aud_needed = 0;
 224         }
 225
 226         *sei = (H264RawSEI) {
 227             .nal_unit_header = {
 228                 .nal_unit_type = H264_NAL_SEI,
 229             },
 230         };
 231
 232         i = 0;
 233
 234         if (priv->sei_needed & SEI_IDENTIFIER) {
 235             sei->payload[i].payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED;
 236             sei->payload[i].payload.user_data_unregistered = priv->sei_identifier;
 237             ++i;
 238         }
 239         if (priv->sei_needed & SEI_TIMING) {
 240             if (pic->type == PICTURE_TYPE_IDR) {
 241                 sei->payload[i].payload_type = H264_SEI_TYPE_BUFFERING_PERIOD;
 242                 sei->payload[i].payload.buffering_period = priv->sei_buffering_period;
 243                 ++i;
 244             }
 245             sei->payload[i].payload_type = H264_SEI_TYPE_PIC_TIMING;
 246             sei->payload[i].payload.pic_timing = priv->sei_pic_timing;
 247             ++i;
 248         }
 249         if (priv->sei_needed & SEI_RECOVERY_POINT) {
 250             sei->payload[i].payload_type = H264_SEI_TYPE_RECOVERY_POINT;
 251             sei->payload[i].payload.recovery_point = priv->sei_recovery_point;
 252             ++i;
 253         }
 254
 255         sei->payload_count = i;
 256         av_assert0(sei->payload_count > 0);
 257
 258         err = vaapi_encode_h264_add_nal(avctx, au, sei);
 259         if (err < 0)
 260             goto fail;
 261         priv->sei_needed = 0;
 262
 263         err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 264         if (err < 0)
 265             goto fail;
 266
 267         ff_cbs_fragment_reset(priv->cbc, au);
 268
 269         *type = VAEncPackedHeaderRawData;
 270         return 0;
 271
 272 #if !CONFIG_VAAPI_1
 273     } else if (priv->sei_cbr_workaround_needed) {
 274         // Insert a zero-length header using the old SEI type.  This is
 275         // required to avoid triggering broken behaviour on Intel platforms
 276         // in CBR mode where an invalid SEI message is generated by the
 277         // driver and inserted into the stream.
 278         *data_len = 0;
 279         *type = VAEncPackedHeaderH264_SEI;
 280         priv->sei_cbr_workaround_needed = 0;
 281         return 0;
 282 #endif
 283
 284     } else {
 285         return AVERROR_EOF;
 286     }
 287
 288 fail:
 289     ff_cbs_fragment_reset(priv->cbc, au);
 290     return err;
 291 }
 292
 293 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 294 {
 295     VAAPIEncodeContext                *ctx = avctx->priv_data;
 296     VAAPIEncodeH264Context           *priv = avctx->priv_data;
 297     H264RawSPS                        *sps = &priv->raw_sps;
 298     H264RawPPS                        *pps = &priv->raw_pps;
 299     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 300     VAEncPictureParameterBufferH264  *vpic = ctx->codec_picture_params;
 301
 302     memset(sps, 0, sizeof(*sps));
 303     memset(pps, 0, sizeof(*pps));
 304
 305     sps->nal_unit_header.nal_ref_idc   = 3;
 306     sps->nal_unit_header.nal_unit_type = H264_NAL_SPS;
 307
 308     sps->profile_idc = avctx->profile & 0xff;
 309
 310     if (avctx->profile == FF_PROFILE_H264_CONSTRAINED_BASELINE ||
 311         avctx->profile == FF_PROFILE_H264_MAIN)
 312         sps->constraint_set1_flag = 1;
 313
 314     if (avctx->profile == FF_PROFILE_H264_HIGH)
 315         sps->constraint_set3_flag = ctx->gop_size == 1;
 316
 317     if (avctx->profile == FF_PROFILE_H264_MAIN ||
 318         avctx->profile == FF_PROFILE_H264_HIGH) {
 319         sps->constraint_set4_flag = 1;
 320         sps->constraint_set5_flag = ctx->b_per_p == 0;
 321     }
 322
 323     if (ctx->gop_size == 1)
 324         priv->dpb_frames = 0;
 325     else
 326         priv->dpb_frames = 1 + ctx->max_b_depth;
 327
 328     if (avctx->level != FF_LEVEL_UNKNOWN) {
 329         sps->level_idc = avctx->level;
 330     } else {
 331         const H264LevelDescriptor *level;
 332
 333         level = ff_h264_guess_level(sps->profile_idc,
 334                                     avctx->bit_rate,
 335                                     priv->mb_width  * 16,
 336                                     priv->mb_height * 16,
 337                                     priv->dpb_frames);
 338         if (level) {
 339             av_log(avctx, AV_LOG_VERBOSE, "Using level %s.\n", level->name);
 340             if (level->constraint_set3_flag)
 341                 sps->constraint_set3_flag = 1;
 342             sps->level_idc = level->level_idc;
 343         } else {
 344             av_log(avctx, AV_LOG_WARNING, "Stream will not conform "
 345                    "to any level: using level 6.2.\n");
 346             sps->level_idc = 62;
 347         }
 348     }
 349
 350     sps->seq_parameter_set_id = 0;
 351     sps->chroma_format_idc    = 1;
 352
 353     sps->log2_max_frame_num_minus4 = 4;
 354     sps->pic_order_cnt_type        = 0;
 355     sps->log2_max_pic_order_cnt_lsb_minus4 = 4;
 356
 357     sps->max_num_ref_frames = priv->dpb_frames;
 358
 359     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 360     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 361
 362     sps->frame_mbs_only_flag = 1;
 363     sps->direct_8x8_inference_flag = 1;
 364
 365     if (avctx->width  != 16 * priv->mb_width ||
 366         avctx->height != 16 * priv->mb_height) {
 367         sps->frame_cropping_flag = 1;
 368
 369         sps->frame_crop_left_offset   = 0;
 370         sps->frame_crop_right_offset  =
 371             (16 * priv->mb_width - avctx->width) / 2;
 372         sps->frame_crop_top_offset    = 0;
 373         sps->frame_crop_bottom_offset =
 374             (16 * priv->mb_height - avctx->height) / 2;
 375     } else {
 376         sps->frame_cropping_flag = 0;
 377     }
 378
 379     sps->vui_parameters_present_flag = 1;
 380
 381     if (avctx->sample_aspect_ratio.num != 0 &&
 382         avctx->sample_aspect_ratio.den != 0) {
 383         static const AVRational sar_idc[] = {
 384             {   0,  0 },
 385             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 386             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 387             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 388             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 389         };
 390         int num, den, i;
 391         av_reduce(&num, &den, avctx->sample_aspect_ratio.num,
 392                   avctx->sample_aspect_ratio.den, 65535);
 393         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 394             if (num == sar_idc[i].num &&
 395                 den == sar_idc[i].den) {
 396                 sps->vui.aspect_ratio_idc = i;
 397                 break;
 398             }
 399         }
 400         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 401             sps->vui.aspect_ratio_idc = 255;
 402             sps->vui.sar_width  = num;
 403             sps->vui.sar_height = den;
 404         }
 405         sps->vui.aspect_ratio_info_present_flag = 1;
 406     }
 407
 408     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 409         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 410         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 411         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 412         sps->vui.video_signal_type_present_flag = 1;
 413         sps->vui.video_format      = 5; // Unspecified.
 414         sps->vui.video_full_range_flag =
 415             avctx->color_range == AVCOL_RANGE_JPEG;
 416
 417         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 418             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 419             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 420             sps->vui.colour_description_present_flag = 1;
 421             sps->vui.colour_primaries         = avctx->color_primaries;
 422             sps->vui.transfer_characteristics = avctx->color_trc;
 423             sps->vui.matrix_coefficients      = avctx->colorspace;
 424         }
 425     } else {
 426         sps->vui.video_format             = 5;
 427         sps->vui.video_full_range_flag    = 0;
 428         sps->vui.colour_primaries         = avctx->color_primaries;
 429         sps->vui.transfer_characteristics = avctx->color_trc;
 430         sps->vui.matrix_coefficients      = avctx->colorspace;
 431     }
 432
 433     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 434         sps->vui.chroma_loc_info_present_flag = 1;
 435         sps->vui.chroma_sample_loc_type_top_field    =
 436         sps->vui.chroma_sample_loc_type_bottom_field =
 437             avctx->chroma_sample_location - 1;
 438     }
 439
 440     sps->vui.timing_info_present_flag = 1;
 441     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 442         sps->vui.num_units_in_tick = avctx->framerate.den;
 443         sps->vui.time_scale        = 2 * avctx->framerate.num;
 444         sps->vui.fixed_frame_rate_flag = 1;
 445     } else {
 446         sps->vui.num_units_in_tick = avctx->time_base.num;
 447         sps->vui.time_scale        = 2 * avctx->time_base.den;
 448         sps->vui.fixed_frame_rate_flag = 0;
 449     }
 450
 451     if (priv->sei & SEI_TIMING) {
 452         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 453         H264RawSEIBufferingPeriod *bp = &priv->sei_buffering_period;
 454
 455         sps->vui.nal_hrd_parameters_present_flag = 1;
 456
 457         hrd->cpb_cnt_minus1 = 0;
 458
 459         // Try to scale these to a sensible range so that the
 460         // golomb encode of the value is not overlong.
 461         hrd->bit_rate_scale =
 462             av_clip_uintp2(av_log2(ctx->va_bit_rate) - 15 - 6, 4);
 463         hrd->bit_rate_value_minus1[0] =
 464             (ctx->va_bit_rate >> hrd->bit_rate_scale + 6) - 1;
 465
 466         hrd->cpb_size_scale =
 467             av_clip_uintp2(av_log2(ctx->hrd_params.hrd.buffer_size) - 15 - 4, 4);
 468         hrd->cpb_size_value_minus1[0] =
 469             (ctx->hrd_params.hrd.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 470
 471         // CBR mode as defined for the HRD cannot be achieved without filler
 472         // data, so this flag cannot be set even with VAAPI CBR modes.
 473         hrd->cbr_flag[0] = 0;
 474
 475         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 476         hrd->cpb_removal_delay_length_minus1         = 23;
 477         hrd->dpb_output_delay_length_minus1          = 7;
 478         hrd->time_offset_length                      = 0;
 479
 480         bp->seq_parameter_set_id = sps->seq_parameter_set_id;
 481
 482         // This calculation can easily overflow 32 bits.
 483         bp->nal.initial_cpb_removal_delay[0] = 90000 *
 484             (uint64_t)ctx->hrd_params.hrd.initial_buffer_fullness /
 485             ctx->hrd_params.hrd.buffer_size;
 486         bp->nal.initial_cpb_removal_delay_offset[0] = 0;
 487     } else {
 488         sps->vui.nal_hrd_parameters_present_flag = 0;
 489         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 490     }
 491
 492     sps->vui.bitstream_restriction_flag    = 1;
 493     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 494     sps->vui.log2_max_mv_length_horizontal = 15;
 495     sps->vui.log2_max_mv_length_vertical   = 15;
 496     sps->vui.max_num_reorder_frames        = ctx->max_b_depth;
 497     sps->vui.max_dec_frame_buffering       = ctx->max_b_depth + 1;
 498
 499     pps->nal_unit_header.nal_ref_idc = 3;
 500     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 501
 502     pps->pic_parameter_set_id = 0;
 503     pps->seq_parameter_set_id = 0;
 504
 505     pps->entropy_coding_mode_flag =
 506         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 507           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 508           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 509     if (!priv->coder && pps->entropy_coding_mode_flag)
 510         pps->entropy_coding_mode_flag = 0;
 511
 512     pps->num_ref_idx_l0_default_active_minus1 = 0;
 513     pps->num_ref_idx_l1_default_active_minus1 = 0;
 514
 515     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 516
 517     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 518         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 519         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 520         pps->more_rbsp_data = 0;
 521     } else {
 522         pps->more_rbsp_data = 1;
 523
 524         pps->transform_8x8_mode_flag = 1;
 525     }
 526
 527     *vseq = (VAEncSequenceParameterBufferH264) {
 528         .seq_parameter_set_id = sps->seq_parameter_set_id,
 529         .level_idc        = sps->level_idc,
 530         .intra_period     = ctx->gop_size,
 531         .intra_idr_period = ctx->gop_size,
 532         .ip_period        = ctx->b_per_p + 1,
 533
 534         .bits_per_second       = ctx->va_bit_rate,
 535         .max_num_ref_frames    = sps->max_num_ref_frames,
 536         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 537         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 538
 539         .seq_fields.bits = {
 540             .chroma_format_idc                 = sps->chroma_format_idc,
 541             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 542             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 543             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 544             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 545             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 546             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 547             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 548             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 549         },
 550
 551         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 552         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 553
 554         .frame_cropping_flag      = sps->frame_cropping_flag,
 555         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 556         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 557         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 558         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 559
 560         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 561
 562         .vui_fields.bits = {
 563             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 564             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 565             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 566             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 567             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 568         },
 569
 570         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 571         .sar_width         = sps->vui.sar_width,
 572         .sar_height        = sps->vui.sar_height,
 573         .num_units_in_tick = sps->vui.num_units_in_tick,
 574         .time_scale        = sps->vui.time_scale,
 575     };
 576
 577     *vpic = (VAEncPictureParameterBufferH264) {
 578         .CurrPic = {
 579             .picture_id = VA_INVALID_ID,
 580             .flags      = VA_PICTURE_H264_INVALID,
 581         },
 582
 583         .coded_buf = VA_INVALID_ID,
 584
 585         .pic_parameter_set_id = pps->pic_parameter_set_id,
 586         .seq_parameter_set_id = pps->seq_parameter_set_id,
 587
 588         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 589         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 590         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 591
 592         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 593         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 594
 595         .pic_fields.bits = {
 596             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 597             .weighted_pred_flag              = pps->weighted_pred_flag,
 598             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 599             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 600             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 601             .deblocking_filter_control_present_flag =
 602                 pps->deblocking_filter_control_present_flag,
 603             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 604             .pic_order_present_flag          =
 605                 pps->bottom_field_pic_order_in_frame_present_flag,
 606             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 607         },
 608     };
 609
 610     return 0;
 611 }
 612
 613 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 614                                                  VAAPIEncodePicture *pic)
 615 {
 616     VAAPIEncodeContext               *ctx = avctx->priv_data;
 617     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 618     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 619     VAAPIEncodePicture              *prev = pic->prev;
 620     VAAPIEncodeH264Picture         *hprev = prev ? prev->priv_data : NULL;
 621     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 622     int i;
 623
 624     if (pic->type == PICTURE_TYPE_IDR) {
 625         av_assert0(pic->display_order == pic->encode_order);
 626
 627         hpic->frame_num      = 0;
 628         hpic->last_idr_frame = pic->display_order;
 629         hpic->idr_pic_id     = hprev ? hprev->idr_pic_id + 1 : 0;
 630
 631         hpic->primary_pic_type = 0;
 632         hpic->slice_type       = 7;
 633     } else {
 634         av_assert0(prev);
 635
 636         hpic->frame_num = hprev->frame_num + prev->is_reference;
 637
 638         hpic->last_idr_frame = hprev->last_idr_frame;
 639         hpic->idr_pic_id     = hprev->idr_pic_id;
 640
 641         if (pic->type == PICTURE_TYPE_I) {
 642             hpic->slice_type       = 7;
 643             hpic->primary_pic_type = 0;
 644         } else if (pic->type == PICTURE_TYPE_P) {
 645             hpic->slice_type       = 5;
 646             hpic->primary_pic_type = 1;
 647         } else {
 648             hpic->slice_type       = 6;
 649             hpic->primary_pic_type = 2;
 650         }
 651     }
 652     hpic->pic_order_cnt = pic->display_order - hpic->last_idr_frame;
 653     hpic->dpb_delay     = pic->display_order - pic->encode_order + ctx->max_b_depth;
 654     hpic->cpb_delay     = pic->encode_order - hpic->last_idr_frame;
 655
 656     if (priv->aud) {
 657         priv->aud_needed = 1;
 658         priv->raw_aud = (H264RawAUD) {
 659             .nal_unit_header = {
 660                 .nal_unit_type = H264_NAL_AUD,
 661             },
 662             .primary_pic_type  = hpic->primary_pic_type,
 663         };
 664     } else {
 665         priv->aud_needed = 0;
 666     }
 667
 668     priv->sei_needed = 0;
 669
 670     if (priv->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 671         priv->sei_needed |= SEI_IDENTIFIER;
 672 #if !CONFIG_VAAPI_1
 673     if (ctx->va_rc_mode == VA_RC_CBR)
 674         priv->sei_cbr_workaround_needed = 1;
 675 #endif
 676
 677     if (priv->sei & SEI_TIMING) {
 678         priv->sei_pic_timing = (H264RawSEIPicTiming) {
 679             .cpb_removal_delay = 2 * hpic->cpb_delay,
 680             .dpb_output_delay  = 2 * hpic->dpb_delay,
 681         };
 682
 683         priv->sei_needed |= SEI_TIMING;
 684     }
 685
 686     if (priv->sei & SEI_RECOVERY_POINT && pic->type == PICTURE_TYPE_I) {
 687         priv->sei_recovery_point = (H264RawSEIRecoveryPoint) {
 688             .recovery_frame_cnt = 0,
 689             .exact_match_flag   = 1,
 690             .broken_link_flag   = ctx->b_per_p > 0,
 691         };
 692
 693         priv->sei_needed |= SEI_RECOVERY_POINT;
 694     }
 695
 696     vpic->CurrPic = (VAPictureH264) {
 697         .picture_id          = pic->recon_surface,
 698         .frame_idx           = hpic->frame_num,
 699         .flags               = 0,
 700         .TopFieldOrderCnt    = hpic->pic_order_cnt,
 701         .BottomFieldOrderCnt = hpic->pic_order_cnt,
 702     };
 703
 704     for (i = 0; i < pic->nb_refs; i++) {
 705         VAAPIEncodePicture      *ref = pic->refs[i];
 706         VAAPIEncodeH264Picture *href;
 707
 708         av_assert0(ref && ref->encode_order < pic->encode_order);
 709         href = ref->priv_data;
 710
 711         vpic->ReferenceFrames[i] = (VAPictureH264) {
 712             .picture_id          = ref->recon_surface,
 713             .frame_idx           = href->frame_num,
 714             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 715             .TopFieldOrderCnt    = href->pic_order_cnt,
 716             .BottomFieldOrderCnt = href->pic_order_cnt,
 717         };
 718     }
 719     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 720         vpic->ReferenceFrames[i] = (VAPictureH264) {
 721             .picture_id = VA_INVALID_ID,
 722             .flags      = VA_PICTURE_H264_INVALID,
 723         };
 724     }
 725
 726     vpic->coded_buf = pic->output_buffer;
 727
 728     vpic->frame_num = hpic->frame_num;
 729
 730     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 731     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 732
 733     return 0;
 734 }
 735
 736 static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
 737                                                    VAAPIEncodePicture *pic,
 738                                                    VAAPIEncodePicture **rpl0,
 739                                                    VAAPIEncodePicture **rpl1,
 740                                                    int *rpl_size)
 741 {
 742     VAAPIEncodePicture *prev;
 743     VAAPIEncodeH264Picture *hp, *hn, *hc;
 744     int i, j, n = 0;
 745
 746     prev = pic->prev;
 747     av_assert0(prev);
 748     hp = pic->priv_data;
 749
 750     for (i = 0; i < pic->prev->nb_dpb_pics; i++) {
 751         hn = prev->dpb[i]->priv_data;
 752         av_assert0(hn->frame_num < hp->frame_num);
 753
 754         if (pic->type == PICTURE_TYPE_P) {
 755             for (j = n; j > 0; j--) {
 756                 hc = rpl0[j - 1]->priv_data;
 757                 av_assert0(hc->frame_num != hn->frame_num);
 758                 if (hc->frame_num > hn->frame_num)
 759                     break;
 760                 rpl0[j] = rpl0[j - 1];
 761             }
 762             rpl0[j] = prev->dpb[i];
 763
 764         } else if (pic->type == PICTURE_TYPE_B) {
 765             for (j = n; j > 0; j--) {
 766                 hc = rpl0[j - 1]->priv_data;
 767                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 768                 if (hc->pic_order_cnt < hp->pic_order_cnt) {
 769                     if (hn->pic_order_cnt > hp->pic_order_cnt ||
 770                         hn->pic_order_cnt < hc->pic_order_cnt)
 771                         break;
 772                 } else {
 773                     if (hn->pic_order_cnt > hc->pic_order_cnt)
 774                         break;
 775                 }
 776                 rpl0[j] = rpl0[j - 1];
 777             }
 778             rpl0[j] = prev->dpb[i];
 779
 780             for (j = n; j > 0; j--) {
 781                 hc = rpl1[j - 1]->priv_data;
 782                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 783                 if (hc->pic_order_cnt > hp->pic_order_cnt) {
 784                     if (hn->pic_order_cnt < hp->pic_order_cnt ||
 785                         hn->pic_order_cnt > hc->pic_order_cnt)
 786                         break;
 787                 } else {
 788                     if (hn->pic_order_cnt < hc->pic_order_cnt)
 789                         break;
 790                 }
 791                 rpl1[j] = rpl1[j - 1];
 792             }
 793             rpl1[j] = prev->dpb[i];
 794         }
 795
 796         ++n;
 797     }
 798
 799     if (pic->type == PICTURE_TYPE_B) {
 800         for (i = 0; i < n; i++) {
 801             if (rpl0[i] != rpl1[i])
 802                 break;
 803         }
 804         if (i == n)
 805             FFSWAP(VAAPIEncodePicture*, rpl1[0], rpl1[1]);
 806     }
 807
 808     if (pic->type == PICTURE_TYPE_P ||
 809         pic->type == PICTURE_TYPE_B) {
 810         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList0 for fn=%d/poc=%d:",
 811                hp->frame_num, hp->pic_order_cnt);
 812         for (i = 0; i < n; i++) {
 813             hn = rpl0[i]->priv_data;
 814             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 815                    hn->frame_num, hn->pic_order_cnt);
 816         }
 817         av_log(avctx, AV_LOG_DEBUG, "\n");
 818     }
 819     if (pic->type == PICTURE_TYPE_B) {
 820         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList1 for fn=%d/poc=%d:",
 821                hp->frame_num, hp->pic_order_cnt);
 822         for (i = 0; i < n; i++) {
 823             hn = rpl1[i]->priv_data;
 824             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 825                    hn->frame_num, hn->pic_order_cnt);
 826         }
 827         av_log(avctx, AV_LOG_DEBUG, "\n");
 828     }
 829
 830     *rpl_size = n;
 831 }
 832
 833 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 834                                                VAAPIEncodePicture *pic,
 835                                                VAAPIEncodeSlice *slice)
 836 {
 837     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 838     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 839     VAAPIEncodePicture              *prev = pic->prev;
 840     H264RawSPS                       *sps = &priv->raw_sps;
 841     H264RawPPS                       *pps = &priv->raw_pps;
 842     H264RawSliceHeader                *sh = &priv->raw_slice.header;
 843     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 844     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 845     int i, j;
 846
 847     if (pic->type == PICTURE_TYPE_IDR) {
 848         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 849         sh->nal_unit_header.nal_ref_idc   = 3;
 850     } else {
 851         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 852         sh->nal_unit_header.nal_ref_idc   = pic->is_reference;
 853     }
 854
 855     sh->first_mb_in_slice = slice->block_start;
 856     sh->slice_type        = hpic->slice_type;
 857
 858     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 859
 860     sh->frame_num = hpic->frame_num &
 861         ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 862     sh->idr_pic_id = hpic->idr_pic_id;
 863     sh->pic_order_cnt_lsb = hpic->pic_order_cnt &
 864         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 865
 866     sh->direct_spatial_mv_pred_flag = 1;
 867
 868     if (pic->type == PICTURE_TYPE_B)
 869         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 870     else if (pic->type == PICTURE_TYPE_P)
 871         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 872     else
 873         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 874
 875     if (pic->is_reference && pic->type != PICTURE_TYPE_IDR) {
 876         VAAPIEncodePicture *discard_list[MAX_DPB_SIZE];
 877         int discard = 0, keep = 0;
 878
 879         // Discard everything which is in the DPB of the previous frame but
 880         // not in the DPB of this one.
 881         for (i = 0; i < prev->nb_dpb_pics; i++) {
 882             for (j = 0; j < pic->nb_dpb_pics; j++) {
 883                 if (prev->dpb[i] == pic->dpb[j])
 884                     break;
 885             }
 886             if (j == pic->nb_dpb_pics) {
 887                 discard_list[discard] = prev->dpb[i];
 888                 ++discard;
 889             } else {
 890                 ++keep;
 891             }
 892         }
 893         av_assert0(keep <= priv->dpb_frames);
 894
 895         if (discard == 0) {
 896             sh->adaptive_ref_pic_marking_mode_flag = 0;
 897         } else {
 898             sh->adaptive_ref_pic_marking_mode_flag = 1;
 899             for (i = 0; i < discard; i++) {
 900                 VAAPIEncodeH264Picture *old = discard_list[i]->priv_data;
 901                 av_assert0(old->frame_num < hpic->frame_num);
 902                 sh->mmco[i].memory_management_control_operation = 1;
 903                 sh->mmco[i].difference_of_pic_nums_minus1 =
 904                     hpic->frame_num - old->frame_num - 1;
 905             }
 906             sh->mmco[i].memory_management_control_operation = 0;
 907         }
 908     }
 909
 910     // If the intended references are not the first entries of RefPicListN
 911     // by default, use ref-pic-list-modification to move them there.
 912     if (pic->type == PICTURE_TYPE_P || pic->type == PICTURE_TYPE_B) {
 913         VAAPIEncodePicture *def_l0[MAX_DPB_SIZE], *def_l1[MAX_DPB_SIZE];
 914         VAAPIEncodeH264Picture *href;
 915         int n;
 916
 917         vaapi_encode_h264_default_ref_pic_list(avctx, pic,
 918                                                def_l0, def_l1, &n);
 919
 920         if (pic->type == PICTURE_TYPE_P) {
 921             int need_rplm = 0;
 922             for (i = 0; i < pic->nb_refs; i++) {
 923                 av_assert0(pic->refs[i]);
 924                 if (pic->refs[i] != def_l0[i])
 925                     need_rplm = 1;
 926             }
 927
 928             sh->ref_pic_list_modification_flag_l0 = need_rplm;
 929             if (need_rplm) {
 930                 int pic_num = hpic->frame_num;
 931                 for (i = 0; i < pic->nb_refs; i++) {
 932                     href = pic->refs[i]->priv_data;
 933                     av_assert0(href->frame_num != pic_num);
 934                     if (href->frame_num < pic_num) {
 935                         sh->rplm_l0[i].modification_of_pic_nums_idc = 0;
 936                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 937                             pic_num - href->frame_num - 1;
 938                     } else {
 939                         sh->rplm_l0[i].modification_of_pic_nums_idc = 1;
 940                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 941                             href->frame_num - pic_num - 1;
 942                     }
 943                     pic_num = href->frame_num;
 944                 }
 945                 sh->rplm_l0[i].modification_of_pic_nums_idc = 3;
 946             }
 947
 948         } else {
 949             int need_rplm_l0 = 0, need_rplm_l1 = 0;
 950             int n0 = 0, n1 = 0;
 951             for (i = 0; i < pic->nb_refs; i++) {
 952                 av_assert0(pic->refs[i]);
 953                 href = pic->refs[i]->priv_data;
 954                 av_assert0(href->pic_order_cnt != hpic->pic_order_cnt);
 955                 if (href->pic_order_cnt < hpic->pic_order_cnt) {
 956                     if (pic->refs[i] != def_l0[n0])
 957                         need_rplm_l0 = 1;
 958                     ++n0;
 959                 } else {
 960                     if (pic->refs[i] != def_l1[n1])
 961                         need_rplm_l1 = 1;
 962                     ++n1;
 963                 }
 964             }
 965
 966             sh->ref_pic_list_modification_flag_l0 = need_rplm_l0;
 967             if (need_rplm_l0) {
 968                 int pic_num = hpic->frame_num;
 969                 for (i = j = 0; i < pic->nb_refs; i++) {
 970                     href = pic->refs[i]->priv_data;
 971                     if (href->pic_order_cnt > hpic->pic_order_cnt)
 972                         continue;
 973                     av_assert0(href->frame_num != pic_num);
 974                     if (href->frame_num < pic_num) {
 975                         sh->rplm_l0[j].modification_of_pic_nums_idc = 0;
 976                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 977                             pic_num - href->frame_num - 1;
 978                     } else {
 979                         sh->rplm_l0[j].modification_of_pic_nums_idc = 1;
 980                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 981                             href->frame_num - pic_num - 1;
 982                     }
 983                     pic_num = href->frame_num;
 984                     ++j;
 985                 }
 986                 av_assert0(j == n0);
 987                 sh->rplm_l0[j].modification_of_pic_nums_idc = 3;
 988             }
 989
 990             sh->ref_pic_list_modification_flag_l1 = need_rplm_l1;
 991             if (need_rplm_l1) {
 992                 int pic_num = hpic->frame_num;
 993                 for (i = j = 0; i < pic->nb_refs; i++) {
 994                     href = pic->refs[i]->priv_data;
 995                     if (href->pic_order_cnt < hpic->pic_order_cnt)
 996                         continue;
 997                     av_assert0(href->frame_num != pic_num);
 998                     if (href->frame_num < pic_num) {
 999                         sh->rplm_l1[j].modification_of_pic_nums_idc = 0;
1000                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
1001                             pic_num - href->frame_num - 1;
1002                     } else {
1003                         sh->rplm_l1[j].modification_of_pic_nums_idc = 1;
1004                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
1005                             href->frame_num - pic_num - 1;
1006                     }
1007                     pic_num = href->frame_num;
1008                     ++j;
1009                 }
1010                 av_assert0(j == n1);
1011                 sh->rplm_l1[j].modification_of_pic_nums_idc = 3;
1012             }
1013         }
1014     }
1015
1016     vslice->macroblock_address = slice->block_start;
1017     vslice->num_macroblocks    = slice->block_size;
1018
1019     vslice->macroblock_info = VA_INVALID_ID;
1020
1021     vslice->slice_type           = sh->slice_type % 5;
1022     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
1023     vslice->idr_pic_id           = sh->idr_pic_id;
1024
1025     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
1026
1027     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
1028
1029     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1030         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1031         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1032         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1033         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1034     }
1035
1036     av_assert0(pic->nb_refs <= 2);
1037     if (pic->nb_refs >= 1) {
1038         // Backward reference for P- or B-frame.
1039         av_assert0(pic->type == PICTURE_TYPE_P ||
1040                    pic->type == PICTURE_TYPE_B);
1041         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1042     }
1043     if (pic->nb_refs >= 2) {
1044         // Forward reference for B-frame.
1045         av_assert0(pic->type == PICTURE_TYPE_B);
1046         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1047     }
1048
1049     vslice->slice_qp_delta = sh->slice_qp_delta;
1050
1051     return 0;
1052 }
1053
1054 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
1055 {
1056     VAAPIEncodeContext      *ctx = avctx->priv_data;
1057     VAAPIEncodeH264Context *priv = avctx->priv_data;
1058     int err;
1059
1060     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
1061     if (err < 0)
1062         return err;
1063
1064     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
1065     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
1066
1067     if (ctx->va_rc_mode == VA_RC_CQP) {
1068         priv->fixed_qp_p = av_clip(ctx->rc_quality, 1, 51);
1069         if (avctx->i_quant_factor > 0.0)
1070             priv->fixed_qp_idr =
1071                 av_clip((avctx->i_quant_factor * priv->fixed_qp_p +
1072                          avctx->i_quant_offset) + 0.5, 1, 51);
1073         else
1074             priv->fixed_qp_idr = priv->fixed_qp_p;
1075         if (avctx->b_quant_factor > 0.0)
1076             priv->fixed_qp_b =
1077                 av_clip((avctx->b_quant_factor * priv->fixed_qp_p +
1078                          avctx->b_quant_offset) + 0.5, 1, 51);
1079         else
1080             priv->fixed_qp_b = priv->fixed_qp_p;
1081
1082         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1083                "%d / %d / %d for IDR- / P- / B-frames.\n",
1084                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1085
1086     } else {
1087         // These still need to be  set for pic_init_qp/slice_qp_delta.
1088         priv->fixed_qp_idr = 26;
1089         priv->fixed_qp_p   = 26;
1090         priv->fixed_qp_b   = 26;
1091     }
1092
1093     if (!ctx->rc_mode->hrd) {
1094         // Timing SEI requires a mode respecting HRD parameters.
1095         priv->sei &= ~SEI_TIMING;
1096     }
1097
1098     if (priv->sei & SEI_IDENTIFIER) {
1099         const char *lavc  = LIBAVCODEC_IDENT;
1100         const char *vaapi = VA_VERSION_S;
1101         const char *driver;
1102         int len;
1103
1104         memcpy(priv->sei_identifier.uuid_iso_iec_11578,
1105                vaapi_encode_h264_sei_identifier_uuid,
1106                sizeof(priv->sei_identifier.uuid_iso_iec_11578));
1107
1108         driver = vaQueryVendorString(ctx->hwctx->display);
1109         if (!driver)
1110             driver = "unknown driver";
1111
1112         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
1113         if (len >= 0) {
1114             priv->sei_identifier_string = av_malloc(len + 1);
1115             if (!priv->sei_identifier_string)
1116                 return AVERROR(ENOMEM);
1117
1118             snprintf(priv->sei_identifier_string, len + 1,
1119                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
1120
1121             priv->sei_identifier.data        = priv->sei_identifier_string;
1122             priv->sei_identifier.data_length = len + 1;
1123         }
1124     }
1125
1126     return 0;
1127 }
1128
1129 static const VAAPIEncodeProfile vaapi_encode_h264_profiles[] = {
1130     { FF_PROFILE_H264_HIGH, 8, 3, 1, 1, VAProfileH264High },
1131     { FF_PROFILE_H264_MAIN, 8, 3, 1, 1, VAProfileH264Main },
1132     { FF_PROFILE_H264_CONSTRAINED_BASELINE,
1133                             8, 3, 1, 1, VAProfileH264ConstrainedBaseline },
1134     { FF_PROFILE_UNKNOWN }
1135 };
1136
1137 static const VAAPIEncodeType vaapi_encode_type_h264 = {
1138     .profiles              = vaapi_encode_h264_profiles,
1139
1140     .flags                 = FLAG_SLICE_CONTROL |
1141                              FLAG_B_PICTURES |
1142                              FLAG_B_PICTURE_REFERENCES |
1143                              FLAG_NON_IDR_KEY_PICTURES,
1144
1145     .default_quality       = 20,
1146
1147     .configure             = &vaapi_encode_h264_configure,
1148
1149     .picture_priv_data_size = sizeof(VAAPIEncodeH264Picture),
1150
1151     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1152     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1153
1154     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1155     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1156
1157     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1158     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1159
1160     .sequence_header_type  = VAEncPackedHeaderSequence,
1161     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1162
1163     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1164     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1165
1166     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1167 };
1168
1169 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1170 {
1171     VAAPIEncodeContext      *ctx = avctx->priv_data;
1172     VAAPIEncodeH264Context *priv = avctx->priv_data;
1173
1174     ctx->codec = &vaapi_encode_type_h264;
1175
1176     if (avctx->profile == FF_PROFILE_UNKNOWN)
1177         avctx->profile = priv->profile;
1178     if (avctx->level == FF_LEVEL_UNKNOWN)
1179         avctx->level = priv->level;
1180     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
1181         avctx->compression_level = priv->quality;
1182
1183     // Reject unsupported profiles.
1184     switch (avctx->profile) {
1185     case FF_PROFILE_H264_BASELINE:
1186         av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
1187                "supported, using constrained baseline profile instead.\n");
1188         avctx->profile = FF_PROFILE_H264_CONSTRAINED_BASELINE;
1189         break;
1190     case FF_PROFILE_H264_EXTENDED:
1191         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1192                "is not supported.\n");
1193         return AVERROR_PATCHWELCOME;
1194     case FF_PROFILE_H264_HIGH_10:
1195     case FF_PROFILE_H264_HIGH_10_INTRA:
1196         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1197                "are not supported.\n");
1198         return AVERROR_PATCHWELCOME;
1199     case FF_PROFILE_H264_HIGH_422:
1200     case FF_PROFILE_H264_HIGH_422_INTRA:
1201     case FF_PROFILE_H264_HIGH_444:
1202     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1203     case FF_PROFILE_H264_HIGH_444_INTRA:
1204     case FF_PROFILE_H264_CAVLC_444:
1205         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1206                "are not supported.\n");
1207         return AVERROR_PATCHWELCOME;
1208     }
1209
1210     if (avctx->level != FF_LEVEL_UNKNOWN && avctx->level & ~0xff) {
1211         av_log(avctx, AV_LOG_ERROR, "Invalid level %d: must fit "
1212                "in 8-bit unsigned integer.\n", avctx->level);
1213         return AVERROR(EINVAL);
1214     }
1215
1216     ctx->desired_packed_headers =
1217         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
1218         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
1219         VA_ENC_PACKED_HEADER_MISC;      // SEI.
1220
1221     ctx->surface_width  = FFALIGN(avctx->width,  16);
1222     ctx->surface_height = FFALIGN(avctx->height, 16);
1223
1224     ctx->slice_block_height = ctx->slice_block_width = 16;
1225
1226     if (priv->qp > 0)
1227         ctx->explicit_qp = priv->qp;
1228
1229     return ff_vaapi_encode_init(avctx);
1230 }
1231
1232 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
1233 {
1234     VAAPIEncodeH264Context *priv = avctx->priv_data;
1235
1236     ff_cbs_fragment_free(priv->cbc, &priv->current_access_unit);
1237     ff_cbs_close(&priv->cbc);
1238     av_freep(&priv->sei_identifier_string);
1239
1240     return ff_vaapi_encode_close(avctx);
1241 }
1242
1243 #define OFFSET(x) offsetof(VAAPIEncodeH264Context, x)
1244 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1245 static const AVOption vaapi_encode_h264_options[] = {
1246     VAAPI_ENCODE_COMMON_OPTIONS,
1247     VAAPI_ENCODE_RC_OPTIONS,
1248
1249     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1250       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 52, FLAGS },
1251     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1252       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
1253     { "coder", "Entropy coder type",
1254       OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
1255         { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1256         { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1257         { "vlc",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1258         { "ac",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1259
1260     { "aud", "Include AUD",
1261       OFFSET(aud), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1262
1263     { "sei", "Set SEI to include",
1264       OFFSET(sei), AV_OPT_TYPE_FLAGS,
1265       { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT },
1266       0, INT_MAX, FLAGS, "sei" },
1267     { "identifier", "Include encoder version identifier",
1268       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
1269       INT_MIN, INT_MAX, FLAGS, "sei" },
1270     { "timing", "Include timing parameters (buffering_period and pic_timing)",
1271       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
1272       INT_MIN, INT_MAX, FLAGS, "sei" },
1273     { "recovery_point", "Include recovery points where appropriate",
1274       0, AV_OPT_TYPE_CONST, { .i64 = SEI_RECOVERY_POINT },
1275       INT_MIN, INT_MAX, FLAGS, "sei" },
1276
1277     { "profile", "Set profile (profile_idc and constraint_set*_flag)",
1278       OFFSET(profile), AV_OPT_TYPE_INT,
1279       { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 0xffff, FLAGS, "profile" },
1280
1281 #define PROFILE(name, value)  name, NULL, 0, AV_OPT_TYPE_CONST, \
1282       { .i64 = value }, 0, 0, FLAGS, "profile"
1283     { PROFILE("constrained_baseline", FF_PROFILE_H264_CONSTRAINED_BASELINE) },
1284     { PROFILE("main",                 FF_PROFILE_H264_MAIN) },
1285     { PROFILE("high",                 FF_PROFILE_H264_HIGH) },
1286 #undef PROFILE
1287
1288     { "level", "Set level (level_idc)",
1289       OFFSET(level), AV_OPT_TYPE_INT,
1290       { .i64 = FF_LEVEL_UNKNOWN }, FF_LEVEL_UNKNOWN, 0xff, FLAGS, "level" },
1291
1292 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
1293       { .i64 = value }, 0, 0, FLAGS, "level"
1294     { LEVEL("1",   10) },
1295     { LEVEL("1.1", 11) },
1296     { LEVEL("1.2", 12) },
1297     { LEVEL("1.3", 13) },
1298     { LEVEL("2",   20) },
1299     { LEVEL("2.1", 21) },
1300     { LEVEL("2.2", 22) },
1301     { LEVEL("3",   30) },
1302     { LEVEL("3.1", 31) },
1303     { LEVEL("3.2", 32) },
1304     { LEVEL("4",   40) },
1305     { LEVEL("4.1", 41) },
1306     { LEVEL("4.2", 42) },
1307     { LEVEL("5",   50) },
1308     { LEVEL("5.1", 51) },
1309     { LEVEL("5.2", 52) },
1310     { LEVEL("6",   60) },
1311     { LEVEL("6.1", 61) },
1312     { LEVEL("6.2", 62) },
1313 #undef LEVEL
1314
1315     { NULL },
1316 };
1317
1318 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1319     { "b",              "0"   },
1320     { "bf",             "2"   },
1321     { "g",              "120" },
1322     { "i_qfactor",      "1"   },
1323     { "i_qoffset",      "0"   },
1324     { "b_qfactor",      "6/5" },
1325     { "b_qoffset",      "0"   },
1326     { "qmin",           "-1"  },
1327     { "qmax",           "-1"  },
1328     { NULL },
1329 };
1330
1331 static const AVClass vaapi_encode_h264_class = {
1332     .class_name = "h264_vaapi",
1333     .item_name  = av_default_item_name,
1334     .option     = vaapi_encode_h264_options,
1335     .version    = LIBAVUTIL_VERSION_INT,
1336 };
1337
1338 AVCodec ff_h264_vaapi_encoder = {
1339     .name           = "h264_vaapi",
1340     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1341     .type           = AVMEDIA_TYPE_VIDEO,
1342     .id             = AV_CODEC_ID_H264,
1343     .priv_data_size = sizeof(VAAPIEncodeH264Context),
1344     .init           = &vaapi_encode_h264_init,
1345     .send_frame     = &ff_vaapi_encode_send_frame,
1346     .receive_packet = &ff_vaapi_encode_receive_packet,
1347     .close          = &vaapi_encode_h264_close,
1348     .priv_class     = &vaapi_encode_h264_class,
1349     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE,
1350     .defaults       = vaapi_encode_h264_defaults,
1351     .pix_fmts = (const enum AVPixelFormat[]) {
1352         AV_PIX_FMT_VAAPI,
1353         AV_PIX_FMT_NONE,
1354     },
1355     .wrapper_name   = "vaapi",
1356 };