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         int framerate;
 333
 334         if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
 335             framerate = avctx->framerate.num / avctx->framerate.den;
 336         else
 337             framerate = 0;
 338
 339         level = ff_h264_guess_level(sps->profile_idc,
 340                                     avctx->bit_rate,
 341                                     framerate,
 342                                     priv->mb_width  * 16,
 343                                     priv->mb_height * 16,
 344                                     priv->dpb_frames);
 345         if (level) {
 346             av_log(avctx, AV_LOG_VERBOSE, "Using level %s.\n", level->name);
 347             if (level->constraint_set3_flag)
 348                 sps->constraint_set3_flag = 1;
 349             sps->level_idc = level->level_idc;
 350         } else {
 351             av_log(avctx, AV_LOG_WARNING, "Stream will not conform "
 352                    "to any level: using level 6.2.\n");
 353             sps->level_idc = 62;
 354         }
 355     }
 356
 357     sps->seq_parameter_set_id = 0;
 358     sps->chroma_format_idc    = 1;
 359
 360     sps->log2_max_frame_num_minus4 = 4;
 361     sps->pic_order_cnt_type        = 0;
 362     sps->log2_max_pic_order_cnt_lsb_minus4 = 4;
 363
 364     sps->max_num_ref_frames = priv->dpb_frames;
 365
 366     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 367     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 368
 369     sps->frame_mbs_only_flag = 1;
 370     sps->direct_8x8_inference_flag = 1;
 371
 372     if (avctx->width  != 16 * priv->mb_width ||
 373         avctx->height != 16 * priv->mb_height) {
 374         sps->frame_cropping_flag = 1;
 375
 376         sps->frame_crop_left_offset   = 0;
 377         sps->frame_crop_right_offset  =
 378             (16 * priv->mb_width - avctx->width) / 2;
 379         sps->frame_crop_top_offset    = 0;
 380         sps->frame_crop_bottom_offset =
 381             (16 * priv->mb_height - avctx->height) / 2;
 382     } else {
 383         sps->frame_cropping_flag = 0;
 384     }
 385
 386     sps->vui_parameters_present_flag = 1;
 387
 388     if (avctx->sample_aspect_ratio.num != 0 &&
 389         avctx->sample_aspect_ratio.den != 0) {
 390         static const AVRational sar_idc[] = {
 391             {   0,  0 },
 392             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 393             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 394             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 395             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 396         };
 397         int num, den, i;
 398         av_reduce(&num, &den, avctx->sample_aspect_ratio.num,
 399                   avctx->sample_aspect_ratio.den, 65535);
 400         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 401             if (num == sar_idc[i].num &&
 402                 den == sar_idc[i].den) {
 403                 sps->vui.aspect_ratio_idc = i;
 404                 break;
 405             }
 406         }
 407         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 408             sps->vui.aspect_ratio_idc = 255;
 409             sps->vui.sar_width  = num;
 410             sps->vui.sar_height = den;
 411         }
 412         sps->vui.aspect_ratio_info_present_flag = 1;
 413     }
 414
 415     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 416         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 417         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 418         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 419         sps->vui.video_signal_type_present_flag = 1;
 420         sps->vui.video_format      = 5; // Unspecified.
 421         sps->vui.video_full_range_flag =
 422             avctx->color_range == AVCOL_RANGE_JPEG;
 423
 424         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 425             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 426             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 427             sps->vui.colour_description_present_flag = 1;
 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     } else {
 433         sps->vui.video_format             = 5;
 434         sps->vui.video_full_range_flag    = 0;
 435         sps->vui.colour_primaries         = avctx->color_primaries;
 436         sps->vui.transfer_characteristics = avctx->color_trc;
 437         sps->vui.matrix_coefficients      = avctx->colorspace;
 438     }
 439
 440     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 441         sps->vui.chroma_loc_info_present_flag = 1;
 442         sps->vui.chroma_sample_loc_type_top_field    =
 443         sps->vui.chroma_sample_loc_type_bottom_field =
 444             avctx->chroma_sample_location - 1;
 445     }
 446
 447     sps->vui.timing_info_present_flag = 1;
 448     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 449         sps->vui.num_units_in_tick = avctx->framerate.den;
 450         sps->vui.time_scale        = 2 * avctx->framerate.num;
 451         sps->vui.fixed_frame_rate_flag = 1;
 452     } else {
 453         sps->vui.num_units_in_tick = avctx->time_base.num;
 454         sps->vui.time_scale        = 2 * avctx->time_base.den;
 455         sps->vui.fixed_frame_rate_flag = 0;
 456     }
 457
 458     if (priv->sei & SEI_TIMING) {
 459         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 460         H264RawSEIBufferingPeriod *bp = &priv->sei_buffering_period;
 461
 462         sps->vui.nal_hrd_parameters_present_flag = 1;
 463
 464         hrd->cpb_cnt_minus1 = 0;
 465
 466         // Try to scale these to a sensible range so that the
 467         // golomb encode of the value is not overlong.
 468         hrd->bit_rate_scale =
 469             av_clip_uintp2(av_log2(ctx->va_bit_rate) - 15 - 6, 4);
 470         hrd->bit_rate_value_minus1[0] =
 471             (ctx->va_bit_rate >> hrd->bit_rate_scale + 6) - 1;
 472
 473         hrd->cpb_size_scale =
 474             av_clip_uintp2(av_log2(ctx->hrd_params.buffer_size) - 15 - 4, 4);
 475         hrd->cpb_size_value_minus1[0] =
 476             (ctx->hrd_params.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 477
 478         // CBR mode as defined for the HRD cannot be achieved without filler
 479         // data, so this flag cannot be set even with VAAPI CBR modes.
 480         hrd->cbr_flag[0] = 0;
 481
 482         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 483         hrd->cpb_removal_delay_length_minus1         = 23;
 484         hrd->dpb_output_delay_length_minus1          = 7;
 485         hrd->time_offset_length                      = 0;
 486
 487         bp->seq_parameter_set_id = sps->seq_parameter_set_id;
 488
 489         // This calculation can easily overflow 32 bits.
 490         bp->nal.initial_cpb_removal_delay[0] = 90000 *
 491             (uint64_t)ctx->hrd_params.initial_buffer_fullness /
 492             ctx->hrd_params.buffer_size;
 493         bp->nal.initial_cpb_removal_delay_offset[0] = 0;
 494     } else {
 495         sps->vui.nal_hrd_parameters_present_flag = 0;
 496         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 497     }
 498
 499     sps->vui.bitstream_restriction_flag    = 1;
 500     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 501     sps->vui.log2_max_mv_length_horizontal = 15;
 502     sps->vui.log2_max_mv_length_vertical   = 15;
 503     sps->vui.max_num_reorder_frames        = ctx->max_b_depth;
 504     sps->vui.max_dec_frame_buffering       = ctx->max_b_depth + 1;
 505
 506     pps->nal_unit_header.nal_ref_idc = 3;
 507     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 508
 509     pps->pic_parameter_set_id = 0;
 510     pps->seq_parameter_set_id = 0;
 511
 512     pps->entropy_coding_mode_flag =
 513         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 514           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 515           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 516     if (!priv->coder && pps->entropy_coding_mode_flag)
 517         pps->entropy_coding_mode_flag = 0;
 518
 519     pps->num_ref_idx_l0_default_active_minus1 = 0;
 520     pps->num_ref_idx_l1_default_active_minus1 = 0;
 521
 522     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 523
 524     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 525         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 526         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 527         pps->more_rbsp_data = 0;
 528     } else {
 529         pps->more_rbsp_data = 1;
 530
 531         pps->transform_8x8_mode_flag = 1;
 532     }
 533
 534     *vseq = (VAEncSequenceParameterBufferH264) {
 535         .seq_parameter_set_id = sps->seq_parameter_set_id,
 536         .level_idc        = sps->level_idc,
 537         .intra_period     = ctx->gop_size,
 538         .intra_idr_period = ctx->gop_size,
 539         .ip_period        = ctx->b_per_p + 1,
 540
 541         .bits_per_second       = ctx->va_bit_rate,
 542         .max_num_ref_frames    = sps->max_num_ref_frames,
 543         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 544         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 545
 546         .seq_fields.bits = {
 547             .chroma_format_idc                 = sps->chroma_format_idc,
 548             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 549             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 550             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 551             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 552             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 553             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 554             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 555             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 556         },
 557
 558         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 559         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 560
 561         .frame_cropping_flag      = sps->frame_cropping_flag,
 562         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 563         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 564         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 565         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 566
 567         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 568
 569         .vui_fields.bits = {
 570             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 571             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 572             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 573             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 574             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 575         },
 576
 577         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 578         .sar_width         = sps->vui.sar_width,
 579         .sar_height        = sps->vui.sar_height,
 580         .num_units_in_tick = sps->vui.num_units_in_tick,
 581         .time_scale        = sps->vui.time_scale,
 582     };
 583
 584     *vpic = (VAEncPictureParameterBufferH264) {
 585         .CurrPic = {
 586             .picture_id = VA_INVALID_ID,
 587             .flags      = VA_PICTURE_H264_INVALID,
 588         },
 589
 590         .coded_buf = VA_INVALID_ID,
 591
 592         .pic_parameter_set_id = pps->pic_parameter_set_id,
 593         .seq_parameter_set_id = pps->seq_parameter_set_id,
 594
 595         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 596         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 597         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 598
 599         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 600         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 601
 602         .pic_fields.bits = {
 603             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 604             .weighted_pred_flag              = pps->weighted_pred_flag,
 605             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 606             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 607             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 608             .deblocking_filter_control_present_flag =
 609                 pps->deblocking_filter_control_present_flag,
 610             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 611             .pic_order_present_flag          =
 612                 pps->bottom_field_pic_order_in_frame_present_flag,
 613             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 614         },
 615     };
 616
 617     return 0;
 618 }
 619
 620 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 621                                                  VAAPIEncodePicture *pic)
 622 {
 623     VAAPIEncodeContext               *ctx = avctx->priv_data;
 624     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 625     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 626     VAAPIEncodePicture              *prev = pic->prev;
 627     VAAPIEncodeH264Picture         *hprev = prev ? prev->priv_data : NULL;
 628     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 629     int i;
 630
 631     if (pic->type == PICTURE_TYPE_IDR) {
 632         av_assert0(pic->display_order == pic->encode_order);
 633
 634         hpic->frame_num      = 0;
 635         hpic->last_idr_frame = pic->display_order;
 636         hpic->idr_pic_id     = hprev ? hprev->idr_pic_id + 1 : 0;
 637
 638         hpic->primary_pic_type = 0;
 639         hpic->slice_type       = 7;
 640     } else {
 641         av_assert0(prev);
 642
 643         hpic->frame_num = hprev->frame_num + prev->is_reference;
 644
 645         hpic->last_idr_frame = hprev->last_idr_frame;
 646         hpic->idr_pic_id     = hprev->idr_pic_id;
 647
 648         if (pic->type == PICTURE_TYPE_I) {
 649             hpic->slice_type       = 7;
 650             hpic->primary_pic_type = 0;
 651         } else if (pic->type == PICTURE_TYPE_P) {
 652             hpic->slice_type       = 5;
 653             hpic->primary_pic_type = 1;
 654         } else {
 655             hpic->slice_type       = 6;
 656             hpic->primary_pic_type = 2;
 657         }
 658     }
 659     hpic->pic_order_cnt = pic->display_order - hpic->last_idr_frame;
 660     hpic->dpb_delay     = pic->display_order - pic->encode_order + ctx->max_b_depth;
 661     hpic->cpb_delay     = pic->encode_order - hpic->last_idr_frame;
 662
 663     if (priv->aud) {
 664         priv->aud_needed = 1;
 665         priv->raw_aud = (H264RawAUD) {
 666             .nal_unit_header = {
 667                 .nal_unit_type = H264_NAL_AUD,
 668             },
 669             .primary_pic_type  = hpic->primary_pic_type,
 670         };
 671     } else {
 672         priv->aud_needed = 0;
 673     }
 674
 675     priv->sei_needed = 0;
 676
 677     if (priv->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 678         priv->sei_needed |= SEI_IDENTIFIER;
 679 #if !CONFIG_VAAPI_1
 680     if (ctx->va_rc_mode == VA_RC_CBR)
 681         priv->sei_cbr_workaround_needed = 1;
 682 #endif
 683
 684     if (priv->sei & SEI_TIMING) {
 685         priv->sei_pic_timing = (H264RawSEIPicTiming) {
 686             .cpb_removal_delay = 2 * hpic->cpb_delay,
 687             .dpb_output_delay  = 2 * hpic->dpb_delay,
 688         };
 689
 690         priv->sei_needed |= SEI_TIMING;
 691     }
 692
 693     if (priv->sei & SEI_RECOVERY_POINT && pic->type == PICTURE_TYPE_I) {
 694         priv->sei_recovery_point = (H264RawSEIRecoveryPoint) {
 695             .recovery_frame_cnt = 0,
 696             .exact_match_flag   = 1,
 697             .broken_link_flag   = ctx->b_per_p > 0,
 698         };
 699
 700         priv->sei_needed |= SEI_RECOVERY_POINT;
 701     }
 702
 703     vpic->CurrPic = (VAPictureH264) {
 704         .picture_id          = pic->recon_surface,
 705         .frame_idx           = hpic->frame_num,
 706         .flags               = 0,
 707         .TopFieldOrderCnt    = hpic->pic_order_cnt,
 708         .BottomFieldOrderCnt = hpic->pic_order_cnt,
 709     };
 710
 711     for (i = 0; i < pic->nb_refs; i++) {
 712         VAAPIEncodePicture      *ref = pic->refs[i];
 713         VAAPIEncodeH264Picture *href;
 714
 715         av_assert0(ref && ref->encode_order < pic->encode_order);
 716         href = ref->priv_data;
 717
 718         vpic->ReferenceFrames[i] = (VAPictureH264) {
 719             .picture_id          = ref->recon_surface,
 720             .frame_idx           = href->frame_num,
 721             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 722             .TopFieldOrderCnt    = href->pic_order_cnt,
 723             .BottomFieldOrderCnt = href->pic_order_cnt,
 724         };
 725     }
 726     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 727         vpic->ReferenceFrames[i] = (VAPictureH264) {
 728             .picture_id = VA_INVALID_ID,
 729             .flags      = VA_PICTURE_H264_INVALID,
 730         };
 731     }
 732
 733     vpic->coded_buf = pic->output_buffer;
 734
 735     vpic->frame_num = hpic->frame_num;
 736
 737     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 738     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 739
 740     return 0;
 741 }
 742
 743 static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
 744                                                    VAAPIEncodePicture *pic,
 745                                                    VAAPIEncodePicture **rpl0,
 746                                                    VAAPIEncodePicture **rpl1,
 747                                                    int *rpl_size)
 748 {
 749     VAAPIEncodePicture *prev;
 750     VAAPIEncodeH264Picture *hp, *hn, *hc;
 751     int i, j, n = 0;
 752
 753     prev = pic->prev;
 754     av_assert0(prev);
 755     hp = pic->priv_data;
 756
 757     for (i = 0; i < pic->prev->nb_dpb_pics; i++) {
 758         hn = prev->dpb[i]->priv_data;
 759         av_assert0(hn->frame_num < hp->frame_num);
 760
 761         if (pic->type == PICTURE_TYPE_P) {
 762             for (j = n; j > 0; j--) {
 763                 hc = rpl0[j - 1]->priv_data;
 764                 av_assert0(hc->frame_num != hn->frame_num);
 765                 if (hc->frame_num > hn->frame_num)
 766                     break;
 767                 rpl0[j] = rpl0[j - 1];
 768             }
 769             rpl0[j] = prev->dpb[i];
 770
 771         } else if (pic->type == PICTURE_TYPE_B) {
 772             for (j = n; j > 0; j--) {
 773                 hc = rpl0[j - 1]->priv_data;
 774                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 775                 if (hc->pic_order_cnt < hp->pic_order_cnt) {
 776                     if (hn->pic_order_cnt > hp->pic_order_cnt ||
 777                         hn->pic_order_cnt < hc->pic_order_cnt)
 778                         break;
 779                 } else {
 780                     if (hn->pic_order_cnt > hc->pic_order_cnt)
 781                         break;
 782                 }
 783                 rpl0[j] = rpl0[j - 1];
 784             }
 785             rpl0[j] = prev->dpb[i];
 786
 787             for (j = n; j > 0; j--) {
 788                 hc = rpl1[j - 1]->priv_data;
 789                 av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
 790                 if (hc->pic_order_cnt > hp->pic_order_cnt) {
 791                     if (hn->pic_order_cnt < hp->pic_order_cnt ||
 792                         hn->pic_order_cnt > hc->pic_order_cnt)
 793                         break;
 794                 } else {
 795                     if (hn->pic_order_cnt < hc->pic_order_cnt)
 796                         break;
 797                 }
 798                 rpl1[j] = rpl1[j - 1];
 799             }
 800             rpl1[j] = prev->dpb[i];
 801         }
 802
 803         ++n;
 804     }
 805
 806     if (pic->type == PICTURE_TYPE_B) {
 807         for (i = 0; i < n; i++) {
 808             if (rpl0[i] != rpl1[i])
 809                 break;
 810         }
 811         if (i == n)
 812             FFSWAP(VAAPIEncodePicture*, rpl1[0], rpl1[1]);
 813     }
 814
 815     if (pic->type == PICTURE_TYPE_P ||
 816         pic->type == PICTURE_TYPE_B) {
 817         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList0 for fn=%d/poc=%d:",
 818                hp->frame_num, hp->pic_order_cnt);
 819         for (i = 0; i < n; i++) {
 820             hn = rpl0[i]->priv_data;
 821             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 822                    hn->frame_num, hn->pic_order_cnt);
 823         }
 824         av_log(avctx, AV_LOG_DEBUG, "\n");
 825     }
 826     if (pic->type == PICTURE_TYPE_B) {
 827         av_log(avctx, AV_LOG_DEBUG, "Default RefPicList1 for fn=%d/poc=%d:",
 828                hp->frame_num, hp->pic_order_cnt);
 829         for (i = 0; i < n; i++) {
 830             hn = rpl1[i]->priv_data;
 831             av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
 832                    hn->frame_num, hn->pic_order_cnt);
 833         }
 834         av_log(avctx, AV_LOG_DEBUG, "\n");
 835     }
 836
 837     *rpl_size = n;
 838 }
 839
 840 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 841                                                VAAPIEncodePicture *pic,
 842                                                VAAPIEncodeSlice *slice)
 843 {
 844     VAAPIEncodeH264Context          *priv = avctx->priv_data;
 845     VAAPIEncodeH264Picture          *hpic = pic->priv_data;
 846     VAAPIEncodePicture              *prev = pic->prev;
 847     H264RawSPS                       *sps = &priv->raw_sps;
 848     H264RawPPS                       *pps = &priv->raw_pps;
 849     H264RawSliceHeader                *sh = &priv->raw_slice.header;
 850     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 851     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 852     int i, j;
 853
 854     if (pic->type == PICTURE_TYPE_IDR) {
 855         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 856         sh->nal_unit_header.nal_ref_idc   = 3;
 857     } else {
 858         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 859         sh->nal_unit_header.nal_ref_idc   = pic->is_reference;
 860     }
 861
 862     sh->first_mb_in_slice = slice->block_start;
 863     sh->slice_type        = hpic->slice_type;
 864
 865     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 866
 867     sh->frame_num = hpic->frame_num &
 868         ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 869     sh->idr_pic_id = hpic->idr_pic_id;
 870     sh->pic_order_cnt_lsb = hpic->pic_order_cnt &
 871         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 872
 873     sh->direct_spatial_mv_pred_flag = 1;
 874
 875     if (pic->type == PICTURE_TYPE_B)
 876         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 877     else if (pic->type == PICTURE_TYPE_P)
 878         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 879     else
 880         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 881
 882     if (pic->is_reference && pic->type != PICTURE_TYPE_IDR) {
 883         VAAPIEncodePicture *discard_list[MAX_DPB_SIZE];
 884         int discard = 0, keep = 0;
 885
 886         // Discard everything which is in the DPB of the previous frame but
 887         // not in the DPB of this one.
 888         for (i = 0; i < prev->nb_dpb_pics; i++) {
 889             for (j = 0; j < pic->nb_dpb_pics; j++) {
 890                 if (prev->dpb[i] == pic->dpb[j])
 891                     break;
 892             }
 893             if (j == pic->nb_dpb_pics) {
 894                 discard_list[discard] = prev->dpb[i];
 895                 ++discard;
 896             } else {
 897                 ++keep;
 898             }
 899         }
 900         av_assert0(keep <= priv->dpb_frames);
 901
 902         if (discard == 0) {
 903             sh->adaptive_ref_pic_marking_mode_flag = 0;
 904         } else {
 905             sh->adaptive_ref_pic_marking_mode_flag = 1;
 906             for (i = 0; i < discard; i++) {
 907                 VAAPIEncodeH264Picture *old = discard_list[i]->priv_data;
 908                 av_assert0(old->frame_num < hpic->frame_num);
 909                 sh->mmco[i].memory_management_control_operation = 1;
 910                 sh->mmco[i].difference_of_pic_nums_minus1 =
 911                     hpic->frame_num - old->frame_num - 1;
 912             }
 913             sh->mmco[i].memory_management_control_operation = 0;
 914         }
 915     }
 916
 917     // If the intended references are not the first entries of RefPicListN
 918     // by default, use ref-pic-list-modification to move them there.
 919     if (pic->type == PICTURE_TYPE_P || pic->type == PICTURE_TYPE_B) {
 920         VAAPIEncodePicture *def_l0[MAX_DPB_SIZE], *def_l1[MAX_DPB_SIZE];
 921         VAAPIEncodeH264Picture *href;
 922         int n;
 923
 924         vaapi_encode_h264_default_ref_pic_list(avctx, pic,
 925                                                def_l0, def_l1, &n);
 926
 927         if (pic->type == PICTURE_TYPE_P) {
 928             int need_rplm = 0;
 929             for (i = 0; i < pic->nb_refs; i++) {
 930                 av_assert0(pic->refs[i]);
 931                 if (pic->refs[i] != def_l0[i])
 932                     need_rplm = 1;
 933             }
 934
 935             sh->ref_pic_list_modification_flag_l0 = need_rplm;
 936             if (need_rplm) {
 937                 int pic_num = hpic->frame_num;
 938                 for (i = 0; i < pic->nb_refs; i++) {
 939                     href = pic->refs[i]->priv_data;
 940                     av_assert0(href->frame_num != pic_num);
 941                     if (href->frame_num < pic_num) {
 942                         sh->rplm_l0[i].modification_of_pic_nums_idc = 0;
 943                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 944                             pic_num - href->frame_num - 1;
 945                     } else {
 946                         sh->rplm_l0[i].modification_of_pic_nums_idc = 1;
 947                         sh->rplm_l0[i].abs_diff_pic_num_minus1 =
 948                             href->frame_num - pic_num - 1;
 949                     }
 950                     pic_num = href->frame_num;
 951                 }
 952                 sh->rplm_l0[i].modification_of_pic_nums_idc = 3;
 953             }
 954
 955         } else {
 956             int need_rplm_l0 = 0, need_rplm_l1 = 0;
 957             int n0 = 0, n1 = 0;
 958             for (i = 0; i < pic->nb_refs; i++) {
 959                 av_assert0(pic->refs[i]);
 960                 href = pic->refs[i]->priv_data;
 961                 av_assert0(href->pic_order_cnt != hpic->pic_order_cnt);
 962                 if (href->pic_order_cnt < hpic->pic_order_cnt) {
 963                     if (pic->refs[i] != def_l0[n0])
 964                         need_rplm_l0 = 1;
 965                     ++n0;
 966                 } else {
 967                     if (pic->refs[i] != def_l1[n1])
 968                         need_rplm_l1 = 1;
 969                     ++n1;
 970                 }
 971             }
 972
 973             sh->ref_pic_list_modification_flag_l0 = need_rplm_l0;
 974             if (need_rplm_l0) {
 975                 int pic_num = hpic->frame_num;
 976                 for (i = j = 0; i < pic->nb_refs; i++) {
 977                     href = pic->refs[i]->priv_data;
 978                     if (href->pic_order_cnt > hpic->pic_order_cnt)
 979                         continue;
 980                     av_assert0(href->frame_num != pic_num);
 981                     if (href->frame_num < pic_num) {
 982                         sh->rplm_l0[j].modification_of_pic_nums_idc = 0;
 983                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 984                             pic_num - href->frame_num - 1;
 985                     } else {
 986                         sh->rplm_l0[j].modification_of_pic_nums_idc = 1;
 987                         sh->rplm_l0[j].abs_diff_pic_num_minus1 =
 988                             href->frame_num - pic_num - 1;
 989                     }
 990                     pic_num = href->frame_num;
 991                     ++j;
 992                 }
 993                 av_assert0(j == n0);
 994                 sh->rplm_l0[j].modification_of_pic_nums_idc = 3;
 995             }
 996
 997             sh->ref_pic_list_modification_flag_l1 = need_rplm_l1;
 998             if (need_rplm_l1) {
 999                 int pic_num = hpic->frame_num;
1000                 for (i = j = 0; i < pic->nb_refs; i++) {
1001                     href = pic->refs[i]->priv_data;
1002                     if (href->pic_order_cnt < hpic->pic_order_cnt)
1003                         continue;
1004                     av_assert0(href->frame_num != pic_num);
1005                     if (href->frame_num < pic_num) {
1006                         sh->rplm_l1[j].modification_of_pic_nums_idc = 0;
1007                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
1008                             pic_num - href->frame_num - 1;
1009                     } else {
1010                         sh->rplm_l1[j].modification_of_pic_nums_idc = 1;
1011                         sh->rplm_l1[j].abs_diff_pic_num_minus1 =
1012                             href->frame_num - pic_num - 1;
1013                     }
1014                     pic_num = href->frame_num;
1015                     ++j;
1016                 }
1017                 av_assert0(j == n1);
1018                 sh->rplm_l1[j].modification_of_pic_nums_idc = 3;
1019             }
1020         }
1021     }
1022
1023     vslice->macroblock_address = slice->block_start;
1024     vslice->num_macroblocks    = slice->block_size;
1025
1026     vslice->macroblock_info = VA_INVALID_ID;
1027
1028     vslice->slice_type           = sh->slice_type % 5;
1029     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
1030     vslice->idr_pic_id           = sh->idr_pic_id;
1031
1032     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
1033
1034     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
1035
1036     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
1037         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
1038         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
1039         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
1040         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
1041     }
1042
1043     av_assert0(pic->nb_refs <= 2);
1044     if (pic->nb_refs >= 1) {
1045         // Backward reference for P- or B-frame.
1046         av_assert0(pic->type == PICTURE_TYPE_P ||
1047                    pic->type == PICTURE_TYPE_B);
1048         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
1049     }
1050     if (pic->nb_refs >= 2) {
1051         // Forward reference for B-frame.
1052         av_assert0(pic->type == PICTURE_TYPE_B);
1053         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
1054     }
1055
1056     vslice->slice_qp_delta = sh->slice_qp_delta;
1057
1058     return 0;
1059 }
1060
1061 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
1062 {
1063     VAAPIEncodeContext      *ctx = avctx->priv_data;
1064     VAAPIEncodeH264Context *priv = avctx->priv_data;
1065     int err;
1066
1067     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
1068     if (err < 0)
1069         return err;
1070
1071     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
1072     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
1073
1074     if (ctx->va_rc_mode == VA_RC_CQP) {
1075         priv->fixed_qp_p = av_clip(ctx->rc_quality, 1, 51);
1076         if (avctx->i_quant_factor > 0.0)
1077             priv->fixed_qp_idr =
1078                 av_clip((avctx->i_quant_factor * priv->fixed_qp_p +
1079                          avctx->i_quant_offset) + 0.5, 1, 51);
1080         else
1081             priv->fixed_qp_idr = priv->fixed_qp_p;
1082         if (avctx->b_quant_factor > 0.0)
1083             priv->fixed_qp_b =
1084                 av_clip((avctx->b_quant_factor * priv->fixed_qp_p +
1085                          avctx->b_quant_offset) + 0.5, 1, 51);
1086         else
1087             priv->fixed_qp_b = priv->fixed_qp_p;
1088
1089         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
1090                "%d / %d / %d for IDR- / P- / B-frames.\n",
1091                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
1092
1093     } else {
1094         // These still need to be  set for pic_init_qp/slice_qp_delta.
1095         priv->fixed_qp_idr = 26;
1096         priv->fixed_qp_p   = 26;
1097         priv->fixed_qp_b   = 26;
1098     }
1099
1100     if (!ctx->rc_mode->hrd) {
1101         // Timing SEI requires a mode respecting HRD parameters.
1102         priv->sei &= ~SEI_TIMING;
1103     }
1104
1105     if (priv->sei & SEI_IDENTIFIER) {
1106         const char *lavc  = LIBAVCODEC_IDENT;
1107         const char *vaapi = VA_VERSION_S;
1108         const char *driver;
1109         int len;
1110
1111         memcpy(priv->sei_identifier.uuid_iso_iec_11578,
1112                vaapi_encode_h264_sei_identifier_uuid,
1113                sizeof(priv->sei_identifier.uuid_iso_iec_11578));
1114
1115         driver = vaQueryVendorString(ctx->hwctx->display);
1116         if (!driver)
1117             driver = "unknown driver";
1118
1119         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
1120         if (len >= 0) {
1121             priv->sei_identifier_string = av_malloc(len + 1);
1122             if (!priv->sei_identifier_string)
1123                 return AVERROR(ENOMEM);
1124
1125             snprintf(priv->sei_identifier_string, len + 1,
1126                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
1127
1128             priv->sei_identifier.data        = priv->sei_identifier_string;
1129             priv->sei_identifier.data_length = len + 1;
1130         }
1131     }
1132
1133     ctx->roi_quant_range = 51 + 6 * (ctx->profile->depth - 8);
1134
1135     return 0;
1136 }
1137
1138 static const VAAPIEncodeProfile vaapi_encode_h264_profiles[] = {
1139     { FF_PROFILE_H264_HIGH, 8, 3, 1, 1, VAProfileH264High },
1140     { FF_PROFILE_H264_MAIN, 8, 3, 1, 1, VAProfileH264Main },
1141     { FF_PROFILE_H264_CONSTRAINED_BASELINE,
1142                             8, 3, 1, 1, VAProfileH264ConstrainedBaseline },
1143     { FF_PROFILE_UNKNOWN }
1144 };
1145
1146 static const VAAPIEncodeType vaapi_encode_type_h264 = {
1147     .profiles              = vaapi_encode_h264_profiles,
1148
1149     .flags                 = FLAG_SLICE_CONTROL |
1150                              FLAG_B_PICTURES |
1151                              FLAG_B_PICTURE_REFERENCES |
1152                              FLAG_NON_IDR_KEY_PICTURES,
1153
1154     .default_quality       = 20,
1155
1156     .configure             = &vaapi_encode_h264_configure,
1157
1158     .picture_priv_data_size = sizeof(VAAPIEncodeH264Picture),
1159
1160     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
1161     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
1162
1163     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
1164     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
1165
1166     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
1167     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
1168
1169     .sequence_header_type  = VAEncPackedHeaderSequence,
1170     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
1171
1172     .slice_header_type     = VAEncPackedHeaderH264_Slice,
1173     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
1174
1175     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
1176 };
1177
1178 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
1179 {
1180     VAAPIEncodeContext      *ctx = avctx->priv_data;
1181     VAAPIEncodeH264Context *priv = avctx->priv_data;
1182
1183     ctx->codec = &vaapi_encode_type_h264;
1184
1185     if (avctx->profile == FF_PROFILE_UNKNOWN)
1186         avctx->profile = priv->profile;
1187     if (avctx->level == FF_LEVEL_UNKNOWN)
1188         avctx->level = priv->level;
1189     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
1190         avctx->compression_level = priv->quality;
1191
1192     // Reject unsupported profiles.
1193     switch (avctx->profile) {
1194     case FF_PROFILE_H264_BASELINE:
1195         av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
1196                "supported, using constrained baseline profile instead.\n");
1197         avctx->profile = FF_PROFILE_H264_CONSTRAINED_BASELINE;
1198         break;
1199     case FF_PROFILE_H264_EXTENDED:
1200         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
1201                "is not supported.\n");
1202         return AVERROR_PATCHWELCOME;
1203     case FF_PROFILE_H264_HIGH_10:
1204     case FF_PROFILE_H264_HIGH_10_INTRA:
1205         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
1206                "are not supported.\n");
1207         return AVERROR_PATCHWELCOME;
1208     case FF_PROFILE_H264_HIGH_422:
1209     case FF_PROFILE_H264_HIGH_422_INTRA:
1210     case FF_PROFILE_H264_HIGH_444:
1211     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1212     case FF_PROFILE_H264_HIGH_444_INTRA:
1213     case FF_PROFILE_H264_CAVLC_444:
1214         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
1215                "are not supported.\n");
1216         return AVERROR_PATCHWELCOME;
1217     }
1218
1219     if (avctx->level != FF_LEVEL_UNKNOWN && avctx->level & ~0xff) {
1220         av_log(avctx, AV_LOG_ERROR, "Invalid level %d: must fit "
1221                "in 8-bit unsigned integer.\n", avctx->level);
1222         return AVERROR(EINVAL);
1223     }
1224
1225     ctx->desired_packed_headers =
1226         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
1227         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
1228         VA_ENC_PACKED_HEADER_MISC;      // SEI.
1229
1230     ctx->surface_width  = FFALIGN(avctx->width,  16);
1231     ctx->surface_height = FFALIGN(avctx->height, 16);
1232
1233     ctx->slice_block_height = ctx->slice_block_width = 16;
1234
1235     if (priv->qp > 0)
1236         ctx->explicit_qp = priv->qp;
1237
1238     return ff_vaapi_encode_init(avctx);
1239 }
1240
1241 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
1242 {
1243     VAAPIEncodeH264Context *priv = avctx->priv_data;
1244
1245     ff_cbs_fragment_free(priv->cbc, &priv->current_access_unit);
1246     ff_cbs_close(&priv->cbc);
1247     av_freep(&priv->sei_identifier_string);
1248
1249     return ff_vaapi_encode_close(avctx);
1250 }
1251
1252 #define OFFSET(x) offsetof(VAAPIEncodeH264Context, x)
1253 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
1254 static const AVOption vaapi_encode_h264_options[] = {
1255     VAAPI_ENCODE_COMMON_OPTIONS,
1256     VAAPI_ENCODE_RC_OPTIONS,
1257
1258     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
1259       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 52, FLAGS },
1260     { "quality", "Set encode quality (trades off against speed, higher is faster)",
1261       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
1262     { "coder", "Entropy coder type",
1263       OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
1264         { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1265         { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1266         { "vlc",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1267         { "ac",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
1268
1269     { "aud", "Include AUD",
1270       OFFSET(aud), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1271
1272     { "sei", "Set SEI to include",
1273       OFFSET(sei), AV_OPT_TYPE_FLAGS,
1274       { .i64 = SEI_IDENTIFIER | SEI_TIMING | SEI_RECOVERY_POINT },
1275       0, INT_MAX, FLAGS, "sei" },
1276     { "identifier", "Include encoder version identifier",
1277       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
1278       INT_MIN, INT_MAX, FLAGS, "sei" },
1279     { "timing", "Include timing parameters (buffering_period and pic_timing)",
1280       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
1281       INT_MIN, INT_MAX, FLAGS, "sei" },
1282     { "recovery_point", "Include recovery points where appropriate",
1283       0, AV_OPT_TYPE_CONST, { .i64 = SEI_RECOVERY_POINT },
1284       INT_MIN, INT_MAX, FLAGS, "sei" },
1285
1286     { "profile", "Set profile (profile_idc and constraint_set*_flag)",
1287       OFFSET(profile), AV_OPT_TYPE_INT,
1288       { .i64 = FF_PROFILE_UNKNOWN }, FF_PROFILE_UNKNOWN, 0xffff, FLAGS, "profile" },
1289
1290 #define PROFILE(name, value)  name, NULL, 0, AV_OPT_TYPE_CONST, \
1291       { .i64 = value }, 0, 0, FLAGS, "profile"
1292     { PROFILE("constrained_baseline", FF_PROFILE_H264_CONSTRAINED_BASELINE) },
1293     { PROFILE("main",                 FF_PROFILE_H264_MAIN) },
1294     { PROFILE("high",                 FF_PROFILE_H264_HIGH) },
1295 #undef PROFILE
1296
1297     { "level", "Set level (level_idc)",
1298       OFFSET(level), AV_OPT_TYPE_INT,
1299       { .i64 = FF_LEVEL_UNKNOWN }, FF_LEVEL_UNKNOWN, 0xff, FLAGS, "level" },
1300
1301 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
1302       { .i64 = value }, 0, 0, FLAGS, "level"
1303     { LEVEL("1",   10) },
1304     { LEVEL("1.1", 11) },
1305     { LEVEL("1.2", 12) },
1306     { LEVEL("1.3", 13) },
1307     { LEVEL("2",   20) },
1308     { LEVEL("2.1", 21) },
1309     { LEVEL("2.2", 22) },
1310     { LEVEL("3",   30) },
1311     { LEVEL("3.1", 31) },
1312     { LEVEL("3.2", 32) },
1313     { LEVEL("4",   40) },
1314     { LEVEL("4.1", 41) },
1315     { LEVEL("4.2", 42) },
1316     { LEVEL("5",   50) },
1317     { LEVEL("5.1", 51) },
1318     { LEVEL("5.2", 52) },
1319     { LEVEL("6",   60) },
1320     { LEVEL("6.1", 61) },
1321     { LEVEL("6.2", 62) },
1322 #undef LEVEL
1323
1324     { NULL },
1325 };
1326
1327 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
1328     { "b",              "0"   },
1329     { "bf",             "2"   },
1330     { "g",              "120" },
1331     { "i_qfactor",      "1"   },
1332     { "i_qoffset",      "0"   },
1333     { "b_qfactor",      "6/5" },
1334     { "b_qoffset",      "0"   },
1335     { "qmin",           "-1"  },
1336     { "qmax",           "-1"  },
1337     { NULL },
1338 };
1339
1340 static const AVClass vaapi_encode_h264_class = {
1341     .class_name = "h264_vaapi",
1342     .item_name  = av_default_item_name,
1343     .option     = vaapi_encode_h264_options,
1344     .version    = LIBAVUTIL_VERSION_INT,
1345 };
1346
1347 AVCodec ff_h264_vaapi_encoder = {
1348     .name           = "h264_vaapi",
1349     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1350     .type           = AVMEDIA_TYPE_VIDEO,
1351     .id             = AV_CODEC_ID_H264,
1352     .priv_data_size = sizeof(VAAPIEncodeH264Context),
1353     .init           = &vaapi_encode_h264_init,
1354     .send_frame     = &ff_vaapi_encode_send_frame,
1355     .receive_packet = &ff_vaapi_encode_receive_packet,
1356     .close          = &vaapi_encode_h264_close,
1357     .priv_class     = &vaapi_encode_h264_class,
1358     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HARDWARE,
1359     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
1360     .defaults       = vaapi_encode_h264_defaults,
1361     .pix_fmts = (const enum AVPixelFormat[]) {
1362         AV_PIX_FMT_VAAPI,
1363         AV_PIX_FMT_NONE,
1364     },
1365     .hw_configs     = ff_vaapi_encode_hw_configs,
1366     .wrapper_name   = "vaapi",
1367 };