libavcodec/vaapi_encode_h264.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <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_sei.h"
  34 #include "internal.h"
  35 #include "vaapi_encode.h"
  36
  37 enum {
  38     SEI_TIMING         = 0x01,
  39     SEI_IDENTIFIER     = 0x02,
  40 };
  41
  42 // Random (version 4) ISO 11578 UUID.
  43 static const uint8_t vaapi_encode_h264_sei_identifier_uuid[16] = {
  44     0x59, 0x94, 0x8b, 0x28, 0x11, 0xec, 0x45, 0xaf,
  45     0x96, 0x75, 0x19, 0xd4, 0x1f, 0xea, 0xa9, 0x4d,
  46 };
  47
  48 typedef struct VAAPIEncodeH264Context {
  49     int mb_width;
  50     int mb_height;
  51
  52     int fixed_qp_idr;
  53     int fixed_qp_p;
  54     int fixed_qp_b;
  55
  56     H264RawAUD aud;
  57     H264RawSPS sps;
  58     H264RawPPS pps;
  59     H264RawSEI sei;
  60     H264RawSlice slice;
  61
  62     H264RawSEIBufferingPeriod buffering_period;
  63     H264RawSEIPicTiming pic_timing;
  64     H264RawSEIUserDataUnregistered identifier;
  65     char *identifier_string;
  66
  67     int frame_num;
  68     int pic_order_cnt;
  69     int next_frame_num;
  70     int64_t last_idr_frame;
  71     int64_t idr_pic_count;
  72
  73     int primary_pic_type;
  74     int slice_type;
  75
  76     int cpb_delay;
  77     int dpb_delay;
  78
  79     CodedBitstreamContext cbc;
  80     CodedBitstreamFragment current_access_unit;
  81     int aud_needed;
  82     int sei_needed;
  83 } VAAPIEncodeH264Context;
  84
  85 typedef struct VAAPIEncodeH264Options {
  86     int qp;
  87     int quality;
  88     int low_power;
  89     int aud;
  90     int sei;
  91 } VAAPIEncodeH264Options;
  92
  93
  94 static int vaapi_encode_h264_write_access_unit(AVCodecContext *avctx,
  95                                                char *data, size_t *data_len,
  96                                                CodedBitstreamFragment *au)
  97 {
  98     VAAPIEncodeContext      *ctx = avctx->priv_data;
  99     VAAPIEncodeH264Context *priv = ctx->priv_data;
 100     int err;
 101
 102     err = ff_cbs_write_fragment_data(&priv->cbc, au);
 103     if (err < 0) {
 104         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");
 105         return err;
 106     }
 107
 108     if (*data_len < 8 * au->data_size - au->data_bit_padding) {
 109         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "
 110                "%zu < %zu.\n", *data_len,
 111                8 * au->data_size - au->data_bit_padding);
 112         return AVERROR(ENOSPC);
 113     }
 114
 115     memcpy(data, au->data, au->data_size);
 116     *data_len = 8 * au->data_size - au->data_bit_padding;
 117
 118     return 0;
 119 }
 120
 121 static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
 122                                      CodedBitstreamFragment *au,
 123                                      void *nal_unit)
 124 {
 125     VAAPIEncodeContext      *ctx = avctx->priv_data;
 126     VAAPIEncodeH264Context *priv = ctx->priv_data;
 127     H264RawNALUnitHeader *header = nal_unit;
 128     int err;
 129
 130     err = ff_cbs_insert_unit_content(&priv->cbc, au, -1,
 131                                      header->nal_unit_type, nal_unit);
 132     if (err < 0) {
 133         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
 134                "type = %d.\n", header->nal_unit_type);
 135         return err;
 136     }
 137
 138     return 0;
 139 }
 140
 141 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 142                                                    char *data, size_t *data_len)
 143 {
 144     VAAPIEncodeContext      *ctx = avctx->priv_data;
 145     VAAPIEncodeH264Context *priv = ctx->priv_data;
 146     CodedBitstreamFragment   *au = &priv->current_access_unit;
 147     int err;
 148
 149     if (priv->aud_needed) {
 150         err = vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 151         if (err < 0)
 152             goto fail;
 153         priv->aud_needed = 0;
 154     }
 155
 156     err = vaapi_encode_h264_add_nal(avctx, au, &priv->sps);
 157     if (err < 0)
 158         goto fail;
 159
 160     err = vaapi_encode_h264_add_nal(avctx, au, &priv->pps);
 161     if (err < 0)
 162         goto fail;
 163
 164     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 165 fail:
 166     ff_cbs_fragment_uninit(&priv->cbc, au);
 167     return err;
 168 }
 169
 170 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 171                                                 VAAPIEncodePicture *pic,
 172                                                 VAAPIEncodeSlice *slice,
 173                                                 char *data, size_t *data_len)
 174 {
 175     VAAPIEncodeContext      *ctx = avctx->priv_data;
 176     VAAPIEncodeH264Context *priv = ctx->priv_data;
 177     CodedBitstreamFragment   *au = &priv->current_access_unit;
 178     int err;
 179
 180     if (priv->aud_needed) {
 181         err = vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 182         if (err < 0)
 183             goto fail;
 184         priv->aud_needed = 0;
 185     }
 186
 187     err = vaapi_encode_h264_add_nal(avctx, au, &priv->slice);
 188     if (err < 0)
 189         goto fail;
 190
 191     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 192 fail:
 193     ff_cbs_fragment_uninit(&priv->cbc, au);
 194     return err;
 195 }
 196
 197 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 198                                                 VAAPIEncodePicture *pic,
 199                                                 int index, int *type,
 200                                                 char *data, size_t *data_len)
 201 {
 202     VAAPIEncodeContext      *ctx = avctx->priv_data;
 203     VAAPIEncodeH264Context *priv = ctx->priv_data;
 204     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 205     CodedBitstreamFragment   *au = &priv->current_access_unit;
 206     int err, i;
 207
 208     if (priv->sei_needed) {
 209         if (priv->aud_needed) {
 210             vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 211             priv->aud_needed = 0;
 212         }
 213
 214         memset(&priv->sei, 0, sizeof(priv->sei));
 215         priv->sei.nal_unit_header.nal_unit_type = H264_NAL_SEI;
 216
 217         i = 0;
 218         if (pic->encode_order == 0 && opt->sei & SEI_IDENTIFIER) {
 219             priv->sei.payload[i].payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED;
 220             priv->sei.payload[i].payload.user_data_unregistered = priv->identifier;
 221             ++i;
 222         }
 223         if (opt->sei & SEI_TIMING) {
 224             if (pic->type == PICTURE_TYPE_IDR) {
 225                 priv->sei.payload[i].payload_type = H264_SEI_TYPE_BUFFERING_PERIOD;
 226                 priv->sei.payload[i].payload.buffering_period = priv->buffering_period;
 227                 ++i;
 228             }
 229             priv->sei.payload[i].payload_type = H264_SEI_TYPE_PIC_TIMING;
 230             priv->sei.payload[i].payload.pic_timing = priv->pic_timing;
 231             ++i;
 232         }
 233
 234         priv->sei.payload_count = i;
 235         av_assert0(priv->sei.payload_count > 0);
 236
 237         err = vaapi_encode_h264_add_nal(avctx, au, &priv->sei);
 238         if (err < 0)
 239             goto fail;
 240         priv->sei_needed = 0;
 241
 242         err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 243         if (err < 0)
 244             goto fail;
 245
 246         ff_cbs_fragment_uninit(&priv->cbc, au);
 247
 248         *type = VAEncPackedHeaderH264_SEI;
 249         return 0;
 250     } else {
 251         return AVERROR_EOF;
 252     }
 253
 254 fail:
 255     ff_cbs_fragment_uninit(&priv->cbc, au);
 256     return err;
 257 }
 258
 259 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 260 {
 261     VAAPIEncodeContext                *ctx = avctx->priv_data;
 262     VAAPIEncodeH264Context           *priv = ctx->priv_data;
 263     VAAPIEncodeH264Options            *opt = ctx->codec_options;
 264     H264RawSPS                        *sps = &priv->sps;
 265     H264RawPPS                        *pps = &priv->pps;
 266     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 267     VAEncPictureParameterBufferH264  *vpic = ctx->codec_picture_params;
 268
 269     memset(&priv->current_access_unit, 0,
 270            sizeof(priv->current_access_unit));
 271
 272     memset(sps, 0, sizeof(*sps));
 273     memset(pps, 0, sizeof(*pps));
 274
 275     sps->nal_unit_header.nal_ref_idc   = 3;
 276     sps->nal_unit_header.nal_unit_type = H264_NAL_SPS;
 277
 278     sps->profile_idc = avctx->profile & 0xff;
 279     sps->constraint_set1_flag =
 280         !!(avctx->profile & FF_PROFILE_H264_CONSTRAINED);
 281     sps->constraint_set3_flag =
 282         !!(avctx->profile & FF_PROFILE_H264_INTRA);
 283
 284     sps->level_idc = avctx->level;
 285
 286     sps->seq_parameter_set_id = 0;
 287     sps->chroma_format_idc    = 1;
 288
 289     sps->log2_max_frame_num_minus4 = 4;
 290     sps->pic_order_cnt_type        = 0;
 291     sps->log2_max_pic_order_cnt_lsb_minus4 =
 292         av_clip(av_log2(ctx->b_per_p + 1) - 2, 0, 12);
 293
 294     sps->max_num_ref_frames =
 295         (avctx->profile & FF_PROFILE_H264_INTRA) ? 0 :
 296         1 + (ctx->b_per_p > 0);
 297
 298     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 299     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 300
 301     sps->frame_mbs_only_flag = 1;
 302     sps->direct_8x8_inference_flag = 1;
 303
 304     if (avctx->width  != 16 * priv->mb_width ||
 305         avctx->height != 16 * priv->mb_height) {
 306         sps->frame_cropping_flag = 1;
 307
 308         sps->frame_crop_left_offset   = 0;
 309         sps->frame_crop_right_offset  =
 310             (16 * priv->mb_width - avctx->width) / 2;
 311         sps->frame_crop_top_offset    = 0;
 312         sps->frame_crop_bottom_offset =
 313             (16 * priv->mb_height - avctx->height) / 2;
 314     } else {
 315         sps->frame_cropping_flag = 0;
 316     }
 317
 318     sps->vui_parameters_present_flag = 1;
 319
 320     if (avctx->sample_aspect_ratio.num != 0 &&
 321         avctx->sample_aspect_ratio.den != 0) {
 322         static const AVRational sar_idc[] = {
 323             {   0,  0 },
 324             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 325             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 326             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 327             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 328         };
 329         int i;
 330         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 331             if (avctx->sample_aspect_ratio.num == sar_idc[i].num &&
 332                 avctx->sample_aspect_ratio.den == sar_idc[i].den) {
 333                 sps->vui.aspect_ratio_idc = i;
 334                 break;
 335             }
 336         }
 337         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 338             sps->vui.aspect_ratio_idc = 255;
 339             sps->vui.sar_width  = avctx->sample_aspect_ratio.num;
 340             sps->vui.sar_height = avctx->sample_aspect_ratio.den;
 341         }
 342         sps->vui.aspect_ratio_info_present_flag = 1;
 343     }
 344
 345     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 346         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 347         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 348         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 349         sps->vui.video_signal_type_present_flag = 1;
 350         sps->vui.video_format      = 5; // Unspecified.
 351         sps->vui.video_full_range_flag =
 352             avctx->color_range == AVCOL_RANGE_JPEG;
 353
 354         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 355             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 356             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 357             sps->vui.colour_description_present_flag = 1;
 358             sps->vui.colour_primaries         = avctx->color_primaries;
 359             sps->vui.transfer_characteristics = avctx->color_trc;
 360             sps->vui.matrix_coefficients      = avctx->colorspace;
 361         }
 362     } else {
 363         sps->vui.video_format             = 5;
 364         sps->vui.video_full_range_flag    = 0;
 365         sps->vui.colour_primaries         = avctx->color_primaries;
 366         sps->vui.transfer_characteristics = avctx->color_trc;
 367         sps->vui.matrix_coefficients      = avctx->colorspace;
 368     }
 369
 370     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 371         sps->vui.chroma_loc_info_present_flag = 1;
 372         sps->vui.chroma_sample_loc_type_top_field    =
 373         sps->vui.chroma_sample_loc_type_bottom_field =
 374             avctx->chroma_sample_location - 1;
 375     }
 376
 377     sps->vui.timing_info_present_flag = 1;
 378     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 379         sps->vui.num_units_in_tick = avctx->framerate.den;
 380         sps->vui.time_scale        = 2 * avctx->framerate.num;
 381         sps->vui.fixed_frame_rate_flag = 1;
 382     } else {
 383         sps->vui.num_units_in_tick = avctx->time_base.num;
 384         sps->vui.time_scale        = 2 * avctx->time_base.den;
 385         sps->vui.fixed_frame_rate_flag = 0;
 386     }
 387
 388     if (opt->sei & SEI_TIMING) {
 389         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 390
 391         sps->vui.nal_hrd_parameters_present_flag = 1;
 392
 393         hrd->cpb_cnt_minus1 = 0;
 394
 395         // Try to scale these to a sensible range so that the
 396         // golomb encode of the value is not overlong.
 397         hrd->bit_rate_scale =
 398             av_clip_uintp2(av_log2(avctx->bit_rate) - 15 - 6, 4);
 399         hrd->bit_rate_value_minus1[0] =
 400             (avctx->bit_rate >> hrd->bit_rate_scale + 6) - 1;
 401
 402         hrd->cpb_size_scale =
 403             av_clip_uintp2(av_log2(ctx->hrd_params.hrd.buffer_size) - 15 - 4, 4);
 404         hrd->cpb_size_value_minus1[0] =
 405             (ctx->hrd_params.hrd.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 406
 407         // CBR mode as defined for the HRD cannot be achieved without filler
 408         // data, so this flag cannot be set even with VAAPI CBR modes.
 409         hrd->cbr_flag[0] = 0;
 410
 411         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 412         hrd->cpb_removal_delay_length_minus1         = 23;
 413         hrd->dpb_output_delay_length_minus1          = 7;
 414         hrd->time_offset_length                      = 0;
 415
 416         priv->buffering_period.seq_parameter_set_id = sps->seq_parameter_set_id;
 417
 418         // This calculation can easily overflow 32 bits.
 419         priv->buffering_period.nal.initial_cpb_removal_delay[0] = 90000 *
 420             (uint64_t)ctx->hrd_params.hrd.initial_buffer_fullness /
 421             ctx->hrd_params.hrd.buffer_size;
 422         priv->buffering_period.nal.initial_cpb_removal_delay_offset[0] = 0;
 423     } else {
 424         sps->vui.nal_hrd_parameters_present_flag = 0;
 425         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 426     }
 427
 428     sps->vui.bitstream_restriction_flag    = 1;
 429     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 430     sps->vui.log2_max_mv_length_horizontal = 16;
 431     sps->vui.log2_max_mv_length_vertical   = 16;
 432     sps->vui.max_num_reorder_frames        = (ctx->b_per_p > 0);
 433     sps->vui.max_dec_frame_buffering       = vseq->max_num_ref_frames;
 434
 435     pps->nal_unit_header.nal_ref_idc = 3;
 436     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 437
 438     pps->pic_parameter_set_id = 0;
 439     pps->seq_parameter_set_id = 0;
 440
 441     pps->entropy_coding_mode_flag =
 442         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 443           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 444           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 445
 446     pps->num_ref_idx_l0_default_active_minus1 = 0;
 447     pps->num_ref_idx_l1_default_active_minus1 = 0;
 448
 449     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 450
 451     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 452         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 453         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 454         pps->more_rbsp_data = 0;
 455     } else {
 456         pps->more_rbsp_data = 1;
 457
 458         pps->transform_8x8_mode_flag = 1;
 459     }
 460
 461     *vseq = (VAEncSequenceParameterBufferH264) {
 462         .seq_parameter_set_id = sps->seq_parameter_set_id,
 463         .level_idc        = sps->level_idc,
 464         .intra_period     = avctx->gop_size,
 465         .intra_idr_period = avctx->gop_size,
 466         .ip_period        = ctx->b_per_p + 1,
 467
 468         .bits_per_second       = avctx->bit_rate,
 469         .max_num_ref_frames    = sps->max_num_ref_frames,
 470         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 471         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 472
 473         .seq_fields.bits = {
 474             .chroma_format_idc                 = sps->chroma_format_idc,
 475             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 476             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 477             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 478             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 479             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 480             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 481             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 482             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 483         },
 484
 485         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 486         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 487
 488         .frame_cropping_flag      = sps->frame_cropping_flag,
 489         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 490         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 491         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 492         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 493
 494         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 495
 496         .vui_fields.bits = {
 497             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 498             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 499             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 500             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 501             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 502         },
 503
 504         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 505         .sar_width         = sps->vui.sar_width,
 506         .sar_height        = sps->vui.sar_height,
 507         .num_units_in_tick = sps->vui.num_units_in_tick,
 508         .time_scale        = sps->vui.time_scale,
 509     };
 510
 511     *vpic = (VAEncPictureParameterBufferH264) {
 512         .CurrPic = {
 513             .picture_id = VA_INVALID_ID,
 514             .flags      = VA_PICTURE_H264_INVALID,
 515         },
 516
 517         .coded_buf = VA_INVALID_ID,
 518
 519         .pic_parameter_set_id = pps->pic_parameter_set_id,
 520         .seq_parameter_set_id = pps->seq_parameter_set_id,
 521
 522         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 523         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 524         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 525
 526         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 527         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 528
 529         .pic_fields.bits = {
 530             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 531             .weighted_pred_flag              = pps->weighted_pred_flag,
 532             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 533             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 534             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 535             .deblocking_filter_control_present_flag =
 536                 pps->deblocking_filter_control_present_flag,
 537             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 538             .pic_order_present_flag          =
 539                 pps->bottom_field_pic_order_in_frame_present_flag,
 540             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 541         },
 542     };
 543
 544     return 0;
 545 }
 546
 547 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 548                                                  VAAPIEncodePicture *pic)
 549 {
 550     VAAPIEncodeContext               *ctx = avctx->priv_data;
 551     VAAPIEncodeH264Context          *priv = ctx->priv_data;
 552     VAAPIEncodeH264Options           *opt = ctx->codec_options;
 553     H264RawSPS                       *sps = &priv->sps;
 554     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 555     int i;
 556
 557     memset(&priv->current_access_unit, 0,
 558            sizeof(priv->current_access_unit));
 559
 560     if (pic->type == PICTURE_TYPE_IDR) {
 561         av_assert0(pic->display_order == pic->encode_order);
 562         priv->frame_num      = 0;
 563         priv->next_frame_num = 1;
 564         priv->cpb_delay      = 0;
 565         priv->last_idr_frame = pic->display_order;
 566         ++priv->idr_pic_count;
 567
 568         priv->slice_type       = 7;
 569         priv->primary_pic_type = 0;
 570     } else {
 571         priv->frame_num      = priv->next_frame_num;
 572
 573         if (pic->type != PICTURE_TYPE_B) {
 574             // Reference picture, so frame_num advances.
 575             priv->next_frame_num = (priv->frame_num + 1) &
 576                 ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 577         }
 578         ++priv->cpb_delay;
 579
 580         if (pic->type == PICTURE_TYPE_I) {
 581             priv->slice_type       = 7;
 582             priv->primary_pic_type = 0;
 583         } else if (pic->type == PICTURE_TYPE_P) {
 584             priv->slice_type       = 5;
 585             priv->primary_pic_type = 1;
 586         } else {
 587             priv->slice_type       = 6;
 588             priv->primary_pic_type = 2;
 589         }
 590     }
 591     priv->pic_order_cnt = pic->display_order - priv->last_idr_frame;
 592     priv->dpb_delay     = pic->display_order - pic->encode_order + 1;
 593
 594     if (opt->aud) {
 595         priv->aud_needed = 1;
 596         priv->aud.nal_unit_header.nal_unit_type = H264_NAL_AUD;
 597         priv->aud.primary_pic_type = priv->primary_pic_type;
 598     } else {
 599         priv->aud_needed = 0;
 600     }
 601
 602     if (opt->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 603         priv->sei_needed = 1;
 604
 605     if (opt->sei & SEI_TIMING) {
 606         memset(&priv->pic_timing, 0, sizeof(priv->pic_timing));
 607
 608         priv->pic_timing.cpb_removal_delay =
 609             2 * sps->vui.num_units_in_tick * priv->cpb_delay;
 610         priv->pic_timing.dpb_output_delay =
 611             2 * sps->vui.num_units_in_tick * priv->dpb_delay;
 612
 613         priv->sei_needed = 1;
 614     }
 615
 616     vpic->CurrPic = (VAPictureH264) {
 617         .picture_id          = pic->recon_surface,
 618         .frame_idx           = priv->frame_num,
 619         .flags               = 0,
 620         .TopFieldOrderCnt    = priv->pic_order_cnt,
 621         .BottomFieldOrderCnt = priv->pic_order_cnt,
 622     };
 623
 624     for (i = 0; i < pic->nb_refs; i++) {
 625         VAAPIEncodePicture *ref = pic->refs[i];
 626         unsigned int frame_num = (ref->encode_order - priv->last_idr_frame) &
 627             ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 628         unsigned int pic_order_cnt = ref->display_order - priv->last_idr_frame;
 629
 630         av_assert0(ref && ref->encode_order < pic->encode_order);
 631         vpic->ReferenceFrames[i] = (VAPictureH264) {
 632             .picture_id          = ref->recon_surface,
 633             .frame_idx           = frame_num,
 634             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 635             .TopFieldOrderCnt    = pic_order_cnt,
 636             .BottomFieldOrderCnt = pic_order_cnt,
 637         };
 638     }
 639     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 640         vpic->ReferenceFrames[i] = (VAPictureH264) {
 641             .picture_id = VA_INVALID_ID,
 642             .flags      = VA_PICTURE_H264_INVALID,
 643         };
 644     }
 645
 646     vpic->coded_buf = pic->output_buffer;
 647
 648     vpic->frame_num = priv->frame_num;
 649
 650     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 651     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 652
 653     pic->nb_slices = 1;
 654
 655     return 0;
 656 }
 657
 658 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 659                                                VAAPIEncodePicture *pic,
 660                                                VAAPIEncodeSlice *slice)
 661 {
 662     VAAPIEncodeContext               *ctx = avctx->priv_data;
 663     VAAPIEncodeH264Context          *priv = ctx->priv_data;
 664     H264RawSPS                       *sps = &priv->sps;
 665     H264RawPPS                       *pps = &priv->pps;
 666     H264RawSliceHeader                *sh = &priv->slice.header;
 667     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 668     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 669     int i;
 670
 671     if (pic->type == PICTURE_TYPE_IDR) {
 672         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 673         sh->nal_unit_header.nal_ref_idc   = 3;
 674     } else {
 675         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 676         sh->nal_unit_header.nal_ref_idc   = pic->type != PICTURE_TYPE_B;
 677     }
 678
 679     // Only one slice per frame.
 680     sh->first_mb_in_slice = 0;
 681     sh->slice_type        = priv->slice_type;
 682
 683     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 684
 685     sh->frame_num  = priv->frame_num;
 686     sh->idr_pic_id = priv->idr_pic_count;
 687
 688     sh->pic_order_cnt_lsb = priv->pic_order_cnt &
 689         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 690
 691     sh->direct_spatial_mv_pred_flag = 1;
 692
 693     if (pic->type == PICTURE_TYPE_B)
 694         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 695     else if (pic->type == PICTURE_TYPE_P)
 696         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 697     else
 698         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 699
 700
 701     vslice->macroblock_address = sh->first_mb_in_slice;
 702     vslice->num_macroblocks    = priv->mb_width * priv->mb_height;
 703
 704     vslice->macroblock_info = VA_INVALID_ID;
 705
 706     vslice->slice_type           = sh->slice_type % 5;
 707     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
 708     vslice->idr_pic_id           = sh->idr_pic_id;
 709
 710     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
 711
 712     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
 713
 714     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
 715         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
 716         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
 717         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
 718         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
 719     }
 720
 721     av_assert0(pic->nb_refs <= 2);
 722     if (pic->nb_refs >= 1) {
 723         // Backward reference for P- or B-frame.
 724         av_assert0(pic->type == PICTURE_TYPE_P ||
 725                    pic->type == PICTURE_TYPE_B);
 726         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
 727     }
 728     if (pic->nb_refs >= 2) {
 729         // Forward reference for B-frame.
 730         av_assert0(pic->type == PICTURE_TYPE_B);
 731         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
 732     }
 733
 734     vslice->slice_qp_delta = sh->slice_qp_delta;
 735
 736     return 0;
 737 }
 738
 739 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
 740 {
 741     VAAPIEncodeContext      *ctx = avctx->priv_data;
 742     VAAPIEncodeH264Context *priv = ctx->priv_data;
 743     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 744     int err;
 745
 746     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
 747     if (err < 0)
 748         return err;
 749
 750     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
 751     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
 752
 753     if (ctx->va_rc_mode == VA_RC_CQP) {
 754         priv->fixed_qp_p = opt->qp;
 755         if (avctx->i_quant_factor > 0.0)
 756             priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
 757                                         avctx->i_quant_offset) + 0.5);
 758         else
 759             priv->fixed_qp_idr = priv->fixed_qp_p;
 760         if (avctx->b_quant_factor > 0.0)
 761             priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
 762                                       avctx->b_quant_offset) + 0.5);
 763         else
 764             priv->fixed_qp_b = priv->fixed_qp_p;
 765
 766         opt->sei &= ~SEI_TIMING;
 767
 768         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
 769                "%d / %d / %d for IDR- / P- / B-frames.\n",
 770                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
 771
 772     } else if (ctx->va_rc_mode == VA_RC_CBR ||
 773                ctx->va_rc_mode == VA_RC_VBR) {
 774         // These still need to be  set for pic_init_qp/slice_qp_delta.
 775         priv->fixed_qp_idr = 26;
 776         priv->fixed_qp_p   = 26;
 777         priv->fixed_qp_b   = 26;
 778
 779         av_log(avctx, AV_LOG_DEBUG, "Using %s-bitrate = %d bps.\n",
 780                ctx->va_rc_mode == VA_RC_CBR ? "constant" : "variable",
 781                avctx->bit_rate);
 782
 783     } else {
 784         av_assert0(0 && "Invalid RC mode.");
 785     }
 786
 787     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
 788         avctx->compression_level = opt->quality;
 789
 790     if (opt->sei & SEI_IDENTIFIER) {
 791         const char *lavc  = LIBAVCODEC_IDENT;
 792         const char *vaapi = VA_VERSION_S;
 793         const char *driver;
 794         int len;
 795
 796         memcpy(priv->identifier.uuid_iso_iec_11578,
 797                vaapi_encode_h264_sei_identifier_uuid,
 798                sizeof(priv->identifier.uuid_iso_iec_11578));
 799
 800         driver = vaQueryVendorString(ctx->hwctx->display);
 801         if (!driver)
 802             driver = "unknown driver";
 803
 804         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
 805         if (len >= 0) {
 806             priv->identifier_string = av_malloc(len + 1);
 807             if (!priv->identifier_string)
 808                 return AVERROR(ENOMEM);
 809
 810             snprintf(priv->identifier_string, len + 1,
 811                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
 812
 813             priv->identifier.data = priv->identifier_string;
 814             priv->identifier.data_length = len + 1;
 815         }
 816     }
 817
 818     return 0;
 819 }
 820
 821 static const VAAPIEncodeType vaapi_encode_type_h264 = {
 822     .priv_data_size        = sizeof(VAAPIEncodeH264Context),
 823
 824     .configure             = &vaapi_encode_h264_configure,
 825
 826     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
 827     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
 828
 829     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
 830     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
 831
 832     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
 833     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
 834
 835     .sequence_header_type  = VAEncPackedHeaderSequence,
 836     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
 837
 838     .slice_header_type     = VAEncPackedHeaderH264_Slice,
 839     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
 840
 841     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
 842 };
 843
 844 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
 845 {
 846     VAAPIEncodeContext     *ctx = avctx->priv_data;
 847     VAAPIEncodeH264Options *opt =
 848         (VAAPIEncodeH264Options*)ctx->codec_options_data;
 849
 850     ctx->codec = &vaapi_encode_type_h264;
 851
 852     switch (avctx->profile) {
 853     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
 854         ctx->va_profile = VAProfileH264ConstrainedBaseline;
 855         break;
 856     case FF_PROFILE_H264_BASELINE:
 857         ctx->va_profile = VAProfileH264Baseline;
 858         break;
 859     case FF_PROFILE_H264_MAIN:
 860         ctx->va_profile = VAProfileH264Main;
 861         break;
 862     case FF_PROFILE_H264_EXTENDED:
 863         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
 864                "is not supported.\n");
 865         return AVERROR_PATCHWELCOME;
 866     case FF_PROFILE_UNKNOWN:
 867     case FF_PROFILE_H264_HIGH:
 868         ctx->va_profile = VAProfileH264High;
 869         break;
 870     case FF_PROFILE_H264_HIGH_10:
 871     case FF_PROFILE_H264_HIGH_10_INTRA:
 872         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
 873                "are not supported.\n");
 874         return AVERROR_PATCHWELCOME;
 875     case FF_PROFILE_H264_HIGH_422:
 876     case FF_PROFILE_H264_HIGH_422_INTRA:
 877     case FF_PROFILE_H264_HIGH_444:
 878     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
 879     case FF_PROFILE_H264_HIGH_444_INTRA:
 880     case FF_PROFILE_H264_CAVLC_444:
 881         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
 882                "are not supported.\n");
 883         return AVERROR_PATCHWELCOME;
 884     default:
 885         av_log(avctx, AV_LOG_ERROR, "Unknown H.264 profile %d.\n",
 886                avctx->profile);
 887         return AVERROR(EINVAL);
 888     }
 889     if (opt->low_power) {
 890 #if VA_CHECK_VERSION(0, 39, 2)
 891         ctx->va_entrypoint = VAEntrypointEncSliceLP;
 892 #else
 893         av_log(avctx, AV_LOG_ERROR, "Low-power encoding is not "
 894                "supported with this VAAPI version.\n");
 895         return AVERROR(EINVAL);
 896 #endif
 897     } else {
 898         ctx->va_entrypoint = VAEntrypointEncSlice;
 899     }
 900
 901     // Only 8-bit encode is supported.
 902     ctx->va_rt_format = VA_RT_FORMAT_YUV420;
 903
 904     if (avctx->bit_rate > 0) {
 905         if (avctx->rc_max_rate == avctx->bit_rate)
 906             ctx->va_rc_mode = VA_RC_CBR;
 907         else
 908             ctx->va_rc_mode = VA_RC_VBR;
 909     } else
 910         ctx->va_rc_mode = VA_RC_CQP;
 911
 912     ctx->va_packed_headers =
 913         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
 914         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
 915         VA_ENC_PACKED_HEADER_MISC;      // SEI.
 916
 917     ctx->surface_width  = FFALIGN(avctx->width,  16);
 918     ctx->surface_height = FFALIGN(avctx->height, 16);
 919
 920     return ff_vaapi_encode_init(avctx);
 921 }
 922
 923 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
 924 {
 925     VAAPIEncodeContext *ctx = avctx->priv_data;
 926     VAAPIEncodeH264Context *priv = ctx->priv_data;
 927
 928     if (priv) {
 929         ff_cbs_close(&priv->cbc);
 930         av_freep(&priv->identifier_string);
 931     }
 932
 933     return ff_vaapi_encode_close(avctx);
 934 }
 935
 936 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
 937                    offsetof(VAAPIEncodeH264Options, x))
 938 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 939 static const AVOption vaapi_encode_h264_options[] = {
 940     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
 941       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
 942     { "quality", "Set encode quality (trades off against speed, higher is faster)",
 943       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, FLAGS },
 944     { "low_power", "Use low-power encoding mode (experimental: only supported "
 945       "on some platforms, does not support all features)",
 946       OFFSET(low_power), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
 947
 948     { "aud", "Include AUD",
 949       OFFSET(aud), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
 950
 951     { "sei", "Set SEI to include",
 952       OFFSET(sei), AV_OPT_TYPE_FLAGS,
 953       { .i64 = SEI_IDENTIFIER | SEI_TIMING },
 954       0, INT_MAX, FLAGS, "sei" },
 955     { "identifier", "Include encoder version identifier",
 956       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
 957       INT_MIN, INT_MAX, FLAGS, "sei" },
 958     { "timing", "Include timing parameters (buffering_period and pic_timing)",
 959       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
 960       INT_MIN, INT_MAX, FLAGS, "sei" },
 961     { NULL },
 962 };
 963
 964 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
 965     { "profile",        "100" },
 966     { "level",          "51"  },
 967     { "b",              "0"   },
 968     { "bf",             "2"   },
 969     { "g",              "120" },
 970     { "i_qfactor",      "1.0" },
 971     { "i_qoffset",      "0.0" },
 972     { "b_qfactor",      "1.2" },
 973     { "b_qoffset",      "0.0" },
 974     { "qmin",           "0"   },
 975     { NULL },
 976 };
 977
 978 static const AVClass vaapi_encode_h264_class = {
 979     .class_name = "h264_vaapi",
 980     .item_name  = av_default_item_name,
 981     .option     = vaapi_encode_h264_options,
 982     .version    = LIBAVUTIL_VERSION_INT,
 983 };
 984
 985 AVCodec ff_h264_vaapi_encoder = {
 986     .name           = "h264_vaapi",
 987     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
 988     .type           = AVMEDIA_TYPE_VIDEO,
 989     .id             = AV_CODEC_ID_H264,
 990     .priv_data_size = (sizeof(VAAPIEncodeContext) +
 991                        sizeof(VAAPIEncodeH264Options)),
 992     .init           = &vaapi_encode_h264_init,
 993     .encode2        = &ff_vaapi_encode2,
 994     .close          = &vaapi_encode_h264_close,
 995     .priv_class     = &vaapi_encode_h264_class,
 996     .capabilities   = AV_CODEC_CAP_DELAY,
 997     .defaults       = vaapi_encode_h264_defaults,
 998     .pix_fmts = (const enum AVPixelFormat[]) {
 999         AV_PIX_FMT_VAAPI,
1000         AV_PIX_FMT_NONE,
1001     },
1002 };