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   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_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     // Entropy encoder type.
  90     int coder;
  91     int aud;
  92     int sei;
  93 } VAAPIEncodeH264Options;
  94
  95
  96 static int vaapi_encode_h264_write_access_unit(AVCodecContext *avctx,
  97                                                char *data, size_t *data_len,
  98                                                CodedBitstreamFragment *au)
  99 {
 100     VAAPIEncodeContext      *ctx = avctx->priv_data;
 101     VAAPIEncodeH264Context *priv = ctx->priv_data;
 102     int err;
 103
 104     err = ff_cbs_write_fragment_data(priv->cbc, au);
 105     if (err < 0) {
 106         av_log(avctx, AV_LOG_ERROR, "Failed to write packed header.\n");
 107         return err;
 108     }
 109
 110     if (*data_len < 8 * au->data_size - au->data_bit_padding) {
 111         av_log(avctx, AV_LOG_ERROR, "Access unit too large: "
 112                "%zu < %zu.\n", *data_len,
 113                8 * au->data_size - au->data_bit_padding);
 114         return AVERROR(ENOSPC);
 115     }
 116
 117     memcpy(data, au->data, au->data_size);
 118     *data_len = 8 * au->data_size - au->data_bit_padding;
 119
 120     return 0;
 121 }
 122
 123 static int vaapi_encode_h264_add_nal(AVCodecContext *avctx,
 124                                      CodedBitstreamFragment *au,
 125                                      void *nal_unit)
 126 {
 127     VAAPIEncodeContext      *ctx = avctx->priv_data;
 128     VAAPIEncodeH264Context *priv = ctx->priv_data;
 129     H264RawNALUnitHeader *header = nal_unit;
 130     int err;
 131
 132     err = ff_cbs_insert_unit_content(priv->cbc, au, -1,
 133                                      header->nal_unit_type, nal_unit);
 134     if (err < 0) {
 135         av_log(avctx, AV_LOG_ERROR, "Failed to add NAL unit: "
 136                "type = %d.\n", header->nal_unit_type);
 137         return err;
 138     }
 139
 140     return 0;
 141 }
 142
 143 static int vaapi_encode_h264_write_sequence_header(AVCodecContext *avctx,
 144                                                    char *data, size_t *data_len)
 145 {
 146     VAAPIEncodeContext      *ctx = avctx->priv_data;
 147     VAAPIEncodeH264Context *priv = ctx->priv_data;
 148     CodedBitstreamFragment   *au = &priv->current_access_unit;
 149     int err;
 150
 151     if (priv->aud_needed) {
 152         err = vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 153         if (err < 0)
 154             goto fail;
 155         priv->aud_needed = 0;
 156     }
 157
 158     err = vaapi_encode_h264_add_nal(avctx, au, &priv->sps);
 159     if (err < 0)
 160         goto fail;
 161
 162     err = vaapi_encode_h264_add_nal(avctx, au, &priv->pps);
 163     if (err < 0)
 164         goto fail;
 165
 166     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 167 fail:
 168     ff_cbs_fragment_uninit(priv->cbc, au);
 169     return err;
 170 }
 171
 172 static int vaapi_encode_h264_write_slice_header(AVCodecContext *avctx,
 173                                                 VAAPIEncodePicture *pic,
 174                                                 VAAPIEncodeSlice *slice,
 175                                                 char *data, size_t *data_len)
 176 {
 177     VAAPIEncodeContext      *ctx = avctx->priv_data;
 178     VAAPIEncodeH264Context *priv = ctx->priv_data;
 179     CodedBitstreamFragment   *au = &priv->current_access_unit;
 180     int err;
 181
 182     if (priv->aud_needed) {
 183         err = vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 184         if (err < 0)
 185             goto fail;
 186         priv->aud_needed = 0;
 187     }
 188
 189     err = vaapi_encode_h264_add_nal(avctx, au, &priv->slice);
 190     if (err < 0)
 191         goto fail;
 192
 193     err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 194 fail:
 195     ff_cbs_fragment_uninit(priv->cbc, au);
 196     return err;
 197 }
 198
 199 static int vaapi_encode_h264_write_extra_header(AVCodecContext *avctx,
 200                                                 VAAPIEncodePicture *pic,
 201                                                 int index, int *type,
 202                                                 char *data, size_t *data_len)
 203 {
 204     VAAPIEncodeContext      *ctx = avctx->priv_data;
 205     VAAPIEncodeH264Context *priv = ctx->priv_data;
 206     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 207     CodedBitstreamFragment   *au = &priv->current_access_unit;
 208     int err, i;
 209
 210     if (priv->sei_needed) {
 211         if (priv->aud_needed) {
 212             vaapi_encode_h264_add_nal(avctx, au, &priv->aud);
 213             priv->aud_needed = 0;
 214         }
 215
 216         memset(&priv->sei, 0, sizeof(priv->sei));
 217         priv->sei.nal_unit_header.nal_unit_type = H264_NAL_SEI;
 218
 219         i = 0;
 220         if (pic->encode_order == 0 && opt->sei & SEI_IDENTIFIER) {
 221             priv->sei.payload[i].payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED;
 222             priv->sei.payload[i].payload.user_data_unregistered = priv->identifier;
 223             ++i;
 224         }
 225         if (opt->sei & SEI_TIMING) {
 226             if (pic->type == PICTURE_TYPE_IDR) {
 227                 priv->sei.payload[i].payload_type = H264_SEI_TYPE_BUFFERING_PERIOD;
 228                 priv->sei.payload[i].payload.buffering_period = priv->buffering_period;
 229                 ++i;
 230             }
 231             priv->sei.payload[i].payload_type = H264_SEI_TYPE_PIC_TIMING;
 232             priv->sei.payload[i].payload.pic_timing = priv->pic_timing;
 233             ++i;
 234         }
 235
 236         priv->sei.payload_count = i;
 237         av_assert0(priv->sei.payload_count > 0);
 238
 239         err = vaapi_encode_h264_add_nal(avctx, au, &priv->sei);
 240         if (err < 0)
 241             goto fail;
 242         priv->sei_needed = 0;
 243
 244         err = vaapi_encode_h264_write_access_unit(avctx, data, data_len, au);
 245         if (err < 0)
 246             goto fail;
 247
 248         ff_cbs_fragment_uninit(priv->cbc, au);
 249
 250         *type = VAEncPackedHeaderH264_SEI;
 251         return 0;
 252     } else {
 253         return AVERROR_EOF;
 254     }
 255
 256 fail:
 257     ff_cbs_fragment_uninit(priv->cbc, au);
 258     return err;
 259 }
 260
 261 static int vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)
 262 {
 263     VAAPIEncodeContext                *ctx = avctx->priv_data;
 264     VAAPIEncodeH264Context           *priv = ctx->priv_data;
 265     VAAPIEncodeH264Options            *opt = ctx->codec_options;
 266     H264RawSPS                        *sps = &priv->sps;
 267     H264RawPPS                        *pps = &priv->pps;
 268     VAEncSequenceParameterBufferH264 *vseq = ctx->codec_sequence_params;
 269     VAEncPictureParameterBufferH264  *vpic = ctx->codec_picture_params;
 270
 271     memset(&priv->current_access_unit, 0,
 272            sizeof(priv->current_access_unit));
 273
 274     memset(sps, 0, sizeof(*sps));
 275     memset(pps, 0, sizeof(*pps));
 276
 277     sps->nal_unit_header.nal_ref_idc   = 3;
 278     sps->nal_unit_header.nal_unit_type = H264_NAL_SPS;
 279
 280     sps->profile_idc = avctx->profile & 0xff;
 281     sps->constraint_set1_flag =
 282         !!(avctx->profile & FF_PROFILE_H264_CONSTRAINED);
 283     sps->constraint_set3_flag =
 284         !!(avctx->profile & FF_PROFILE_H264_INTRA);
 285
 286     sps->level_idc = avctx->level;
 287
 288     sps->seq_parameter_set_id = 0;
 289     sps->chroma_format_idc    = 1;
 290
 291     sps->log2_max_frame_num_minus4 = 4;
 292     sps->pic_order_cnt_type        = 0;
 293     sps->log2_max_pic_order_cnt_lsb_minus4 =
 294         av_clip(av_log2(ctx->b_per_p + 1) - 2, 0, 12);
 295
 296     sps->max_num_ref_frames =
 297         (avctx->profile & FF_PROFILE_H264_INTRA) ? 0 :
 298         1 + (ctx->b_per_p > 0);
 299
 300     sps->pic_width_in_mbs_minus1        = priv->mb_width  - 1;
 301     sps->pic_height_in_map_units_minus1 = priv->mb_height - 1;
 302
 303     sps->frame_mbs_only_flag = 1;
 304     sps->direct_8x8_inference_flag = 1;
 305
 306     if (avctx->width  != 16 * priv->mb_width ||
 307         avctx->height != 16 * priv->mb_height) {
 308         sps->frame_cropping_flag = 1;
 309
 310         sps->frame_crop_left_offset   = 0;
 311         sps->frame_crop_right_offset  =
 312             (16 * priv->mb_width - avctx->width) / 2;
 313         sps->frame_crop_top_offset    = 0;
 314         sps->frame_crop_bottom_offset =
 315             (16 * priv->mb_height - avctx->height) / 2;
 316     } else {
 317         sps->frame_cropping_flag = 0;
 318     }
 319
 320     sps->vui_parameters_present_flag = 1;
 321
 322     if (avctx->sample_aspect_ratio.num != 0 &&
 323         avctx->sample_aspect_ratio.den != 0) {
 324         static const AVRational sar_idc[] = {
 325             {   0,  0 },
 326             {   1,  1 }, {  12, 11 }, {  10, 11 }, {  16, 11 },
 327             {  40, 33 }, {  24, 11 }, {  20, 11 }, {  32, 11 },
 328             {  80, 33 }, {  18, 11 }, {  15, 11 }, {  64, 33 },
 329             { 160, 99 }, {   4,  3 }, {   3,  2 }, {   2,  1 },
 330         };
 331         int i;
 332         for (i = 0; i < FF_ARRAY_ELEMS(sar_idc); i++) {
 333             if (avctx->sample_aspect_ratio.num == sar_idc[i].num &&
 334                 avctx->sample_aspect_ratio.den == sar_idc[i].den) {
 335                 sps->vui.aspect_ratio_idc = i;
 336                 break;
 337             }
 338         }
 339         if (i >= FF_ARRAY_ELEMS(sar_idc)) {
 340             sps->vui.aspect_ratio_idc = 255;
 341             sps->vui.sar_width  = avctx->sample_aspect_ratio.num;
 342             sps->vui.sar_height = avctx->sample_aspect_ratio.den;
 343         }
 344         sps->vui.aspect_ratio_info_present_flag = 1;
 345     }
 346
 347     if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
 348         avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 349         avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 350         avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 351         sps->vui.video_signal_type_present_flag = 1;
 352         sps->vui.video_format      = 5; // Unspecified.
 353         sps->vui.video_full_range_flag =
 354             avctx->color_range == AVCOL_RANGE_JPEG;
 355
 356         if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 357             avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
 358             avctx->colorspace      != AVCOL_SPC_UNSPECIFIED) {
 359             sps->vui.colour_description_present_flag = 1;
 360             sps->vui.colour_primaries         = avctx->color_primaries;
 361             sps->vui.transfer_characteristics = avctx->color_trc;
 362             sps->vui.matrix_coefficients      = avctx->colorspace;
 363         }
 364     } else {
 365         sps->vui.video_format             = 5;
 366         sps->vui.video_full_range_flag    = 0;
 367         sps->vui.colour_primaries         = avctx->color_primaries;
 368         sps->vui.transfer_characteristics = avctx->color_trc;
 369         sps->vui.matrix_coefficients      = avctx->colorspace;
 370     }
 371
 372     if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
 373         sps->vui.chroma_loc_info_present_flag = 1;
 374         sps->vui.chroma_sample_loc_type_top_field    =
 375         sps->vui.chroma_sample_loc_type_bottom_field =
 376             avctx->chroma_sample_location - 1;
 377     }
 378
 379     sps->vui.timing_info_present_flag = 1;
 380     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
 381         sps->vui.num_units_in_tick = avctx->framerate.den;
 382         sps->vui.time_scale        = 2 * avctx->framerate.num;
 383         sps->vui.fixed_frame_rate_flag = 1;
 384     } else {
 385         sps->vui.num_units_in_tick = avctx->time_base.num;
 386         sps->vui.time_scale        = 2 * avctx->time_base.den;
 387         sps->vui.fixed_frame_rate_flag = 0;
 388     }
 389
 390     if (opt->sei & SEI_TIMING) {
 391         H264RawHRD *hrd = &sps->vui.nal_hrd_parameters;
 392
 393         sps->vui.nal_hrd_parameters_present_flag = 1;
 394
 395         hrd->cpb_cnt_minus1 = 0;
 396
 397         // Try to scale these to a sensible range so that the
 398         // golomb encode of the value is not overlong.
 399         hrd->bit_rate_scale =
 400             av_clip_uintp2(av_log2(avctx->bit_rate) - 15 - 6, 4);
 401         hrd->bit_rate_value_minus1[0] =
 402             (avctx->bit_rate >> hrd->bit_rate_scale + 6) - 1;
 403
 404         hrd->cpb_size_scale =
 405             av_clip_uintp2(av_log2(ctx->hrd_params.hrd.buffer_size) - 15 - 4, 4);
 406         hrd->cpb_size_value_minus1[0] =
 407             (ctx->hrd_params.hrd.buffer_size >> hrd->cpb_size_scale + 4) - 1;
 408
 409         // CBR mode as defined for the HRD cannot be achieved without filler
 410         // data, so this flag cannot be set even with VAAPI CBR modes.
 411         hrd->cbr_flag[0] = 0;
 412
 413         hrd->initial_cpb_removal_delay_length_minus1 = 23;
 414         hrd->cpb_removal_delay_length_minus1         = 23;
 415         hrd->dpb_output_delay_length_minus1          = 7;
 416         hrd->time_offset_length                      = 0;
 417
 418         priv->buffering_period.seq_parameter_set_id = sps->seq_parameter_set_id;
 419
 420         // This calculation can easily overflow 32 bits.
 421         priv->buffering_period.nal.initial_cpb_removal_delay[0] = 90000 *
 422             (uint64_t)ctx->hrd_params.hrd.initial_buffer_fullness /
 423             ctx->hrd_params.hrd.buffer_size;
 424         priv->buffering_period.nal.initial_cpb_removal_delay_offset[0] = 0;
 425     } else {
 426         sps->vui.nal_hrd_parameters_present_flag = 0;
 427         sps->vui.low_delay_hrd_flag = 1 - sps->vui.fixed_frame_rate_flag;
 428     }
 429
 430     sps->vui.bitstream_restriction_flag    = 1;
 431     sps->vui.motion_vectors_over_pic_boundaries_flag = 1;
 432     sps->vui.log2_max_mv_length_horizontal = 16;
 433     sps->vui.log2_max_mv_length_vertical   = 16;
 434     sps->vui.max_num_reorder_frames        = (ctx->b_per_p > 0);
 435     sps->vui.max_dec_frame_buffering       = vseq->max_num_ref_frames;
 436
 437     pps->nal_unit_header.nal_ref_idc = 3;
 438     pps->nal_unit_header.nal_unit_type = H264_NAL_PPS;
 439
 440     pps->pic_parameter_set_id = 0;
 441     pps->seq_parameter_set_id = 0;
 442
 443     pps->entropy_coding_mode_flag =
 444         !(sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 445           sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 446           sps->profile_idc == FF_PROFILE_H264_CAVLC_444);
 447     if (!opt->coder && pps->entropy_coding_mode_flag)
 448         pps->entropy_coding_mode_flag = 0;
 449
 450     pps->num_ref_idx_l0_default_active_minus1 = 0;
 451     pps->num_ref_idx_l1_default_active_minus1 = 0;
 452
 453     pps->pic_init_qp_minus26 = priv->fixed_qp_idr - 26;
 454
 455     if (sps->profile_idc == FF_PROFILE_H264_BASELINE ||
 456         sps->profile_idc == FF_PROFILE_H264_EXTENDED ||
 457         sps->profile_idc == FF_PROFILE_H264_MAIN) {
 458         pps->more_rbsp_data = 0;
 459     } else {
 460         pps->more_rbsp_data = 1;
 461
 462         pps->transform_8x8_mode_flag = 1;
 463     }
 464
 465     *vseq = (VAEncSequenceParameterBufferH264) {
 466         .seq_parameter_set_id = sps->seq_parameter_set_id,
 467         .level_idc        = sps->level_idc,
 468         .intra_period     = avctx->gop_size,
 469         .intra_idr_period = avctx->gop_size,
 470         .ip_period        = ctx->b_per_p + 1,
 471
 472         .bits_per_second       = avctx->bit_rate,
 473         .max_num_ref_frames    = sps->max_num_ref_frames,
 474         .picture_width_in_mbs  = sps->pic_width_in_mbs_minus1 + 1,
 475         .picture_height_in_mbs = sps->pic_height_in_map_units_minus1 + 1,
 476
 477         .seq_fields.bits = {
 478             .chroma_format_idc                 = sps->chroma_format_idc,
 479             .frame_mbs_only_flag               = sps->frame_mbs_only_flag,
 480             .mb_adaptive_frame_field_flag      = sps->mb_adaptive_frame_field_flag,
 481             .seq_scaling_matrix_present_flag   = sps->seq_scaling_matrix_present_flag,
 482             .direct_8x8_inference_flag         = sps->direct_8x8_inference_flag,
 483             .log2_max_frame_num_minus4         = sps->log2_max_frame_num_minus4,
 484             .pic_order_cnt_type                = sps->pic_order_cnt_type,
 485             .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
 486             .delta_pic_order_always_zero_flag  = sps->delta_pic_order_always_zero_flag,
 487         },
 488
 489         .bit_depth_luma_minus8   = sps->bit_depth_luma_minus8,
 490         .bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
 491
 492         .frame_cropping_flag      = sps->frame_cropping_flag,
 493         .frame_crop_left_offset   = sps->frame_crop_left_offset,
 494         .frame_crop_right_offset  = sps->frame_crop_right_offset,
 495         .frame_crop_top_offset    = sps->frame_crop_top_offset,
 496         .frame_crop_bottom_offset = sps->frame_crop_bottom_offset,
 497
 498         .vui_parameters_present_flag = sps->vui_parameters_present_flag,
 499
 500         .vui_fields.bits = {
 501             .aspect_ratio_info_present_flag = sps->vui.aspect_ratio_info_present_flag,
 502             .timing_info_present_flag       = sps->vui.timing_info_present_flag,
 503             .bitstream_restriction_flag     = sps->vui.bitstream_restriction_flag,
 504             .log2_max_mv_length_horizontal  = sps->vui.log2_max_mv_length_horizontal,
 505             .log2_max_mv_length_vertical    = sps->vui.log2_max_mv_length_vertical,
 506         },
 507
 508         .aspect_ratio_idc  = sps->vui.aspect_ratio_idc,
 509         .sar_width         = sps->vui.sar_width,
 510         .sar_height        = sps->vui.sar_height,
 511         .num_units_in_tick = sps->vui.num_units_in_tick,
 512         .time_scale        = sps->vui.time_scale,
 513     };
 514
 515     *vpic = (VAEncPictureParameterBufferH264) {
 516         .CurrPic = {
 517             .picture_id = VA_INVALID_ID,
 518             .flags      = VA_PICTURE_H264_INVALID,
 519         },
 520
 521         .coded_buf = VA_INVALID_ID,
 522
 523         .pic_parameter_set_id = pps->pic_parameter_set_id,
 524         .seq_parameter_set_id = pps->seq_parameter_set_id,
 525
 526         .pic_init_qp                  = pps->pic_init_qp_minus26 + 26,
 527         .num_ref_idx_l0_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
 528         .num_ref_idx_l1_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
 529
 530         .chroma_qp_index_offset        = pps->chroma_qp_index_offset,
 531         .second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
 532
 533         .pic_fields.bits = {
 534             .entropy_coding_mode_flag        = pps->entropy_coding_mode_flag,
 535             .weighted_pred_flag              = pps->weighted_pred_flag,
 536             .weighted_bipred_idc             = pps->weighted_bipred_idc,
 537             .constrained_intra_pred_flag     = pps->constrained_intra_pred_flag,
 538             .transform_8x8_mode_flag         = pps->transform_8x8_mode_flag,
 539             .deblocking_filter_control_present_flag =
 540                 pps->deblocking_filter_control_present_flag,
 541             .redundant_pic_cnt_present_flag  = pps->redundant_pic_cnt_present_flag,
 542             .pic_order_present_flag          =
 543                 pps->bottom_field_pic_order_in_frame_present_flag,
 544             .pic_scaling_matrix_present_flag = pps->pic_scaling_matrix_present_flag,
 545         },
 546     };
 547
 548     return 0;
 549 }
 550
 551 static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
 552                                                  VAAPIEncodePicture *pic)
 553 {
 554     VAAPIEncodeContext               *ctx = avctx->priv_data;
 555     VAAPIEncodeH264Context          *priv = ctx->priv_data;
 556     VAAPIEncodeH264Options           *opt = ctx->codec_options;
 557     H264RawSPS                       *sps = &priv->sps;
 558     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 559     int i;
 560
 561     memset(&priv->current_access_unit, 0,
 562            sizeof(priv->current_access_unit));
 563
 564     if (pic->type == PICTURE_TYPE_IDR) {
 565         av_assert0(pic->display_order == pic->encode_order);
 566         priv->frame_num      = 0;
 567         priv->next_frame_num = 1;
 568         priv->cpb_delay      = 0;
 569         priv->last_idr_frame = pic->display_order;
 570         ++priv->idr_pic_count;
 571
 572         priv->slice_type       = 7;
 573         priv->primary_pic_type = 0;
 574     } else {
 575         priv->frame_num      = priv->next_frame_num;
 576
 577         if (pic->type != PICTURE_TYPE_B) {
 578             // Reference picture, so frame_num advances.
 579             priv->next_frame_num = (priv->frame_num + 1) &
 580                 ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 581         }
 582         ++priv->cpb_delay;
 583
 584         if (pic->type == PICTURE_TYPE_I) {
 585             priv->slice_type       = 7;
 586             priv->primary_pic_type = 0;
 587         } else if (pic->type == PICTURE_TYPE_P) {
 588             priv->slice_type       = 5;
 589             priv->primary_pic_type = 1;
 590         } else {
 591             priv->slice_type       = 6;
 592             priv->primary_pic_type = 2;
 593         }
 594     }
 595     priv->pic_order_cnt = pic->display_order - priv->last_idr_frame;
 596     priv->dpb_delay     = pic->display_order - pic->encode_order + 1;
 597
 598     if (opt->aud) {
 599         priv->aud_needed = 1;
 600         priv->aud.nal_unit_header.nal_unit_type = H264_NAL_AUD;
 601         priv->aud.primary_pic_type = priv->primary_pic_type;
 602     } else {
 603         priv->aud_needed = 0;
 604     }
 605
 606     if (opt->sei & SEI_IDENTIFIER && pic->encode_order == 0)
 607         priv->sei_needed = 1;
 608
 609     if (opt->sei & SEI_TIMING) {
 610         memset(&priv->pic_timing, 0, sizeof(priv->pic_timing));
 611
 612         priv->pic_timing.cpb_removal_delay =
 613             2 * sps->vui.num_units_in_tick * priv->cpb_delay;
 614         priv->pic_timing.dpb_output_delay =
 615             2 * sps->vui.num_units_in_tick * priv->dpb_delay;
 616
 617         priv->sei_needed = 1;
 618     }
 619
 620     vpic->CurrPic = (VAPictureH264) {
 621         .picture_id          = pic->recon_surface,
 622         .frame_idx           = priv->frame_num,
 623         .flags               = 0,
 624         .TopFieldOrderCnt    = priv->pic_order_cnt,
 625         .BottomFieldOrderCnt = priv->pic_order_cnt,
 626     };
 627
 628     for (i = 0; i < pic->nb_refs; i++) {
 629         VAAPIEncodePicture *ref = pic->refs[i];
 630         unsigned int frame_num = (ref->encode_order - priv->last_idr_frame) &
 631             ((1 << (4 + sps->log2_max_frame_num_minus4)) - 1);
 632         unsigned int pic_order_cnt = ref->display_order - priv->last_idr_frame;
 633
 634         av_assert0(ref && ref->encode_order < pic->encode_order);
 635         vpic->ReferenceFrames[i] = (VAPictureH264) {
 636             .picture_id          = ref->recon_surface,
 637             .frame_idx           = frame_num,
 638             .flags               = VA_PICTURE_H264_SHORT_TERM_REFERENCE,
 639             .TopFieldOrderCnt    = pic_order_cnt,
 640             .BottomFieldOrderCnt = pic_order_cnt,
 641         };
 642     }
 643     for (; i < FF_ARRAY_ELEMS(vpic->ReferenceFrames); i++) {
 644         vpic->ReferenceFrames[i] = (VAPictureH264) {
 645             .picture_id = VA_INVALID_ID,
 646             .flags      = VA_PICTURE_H264_INVALID,
 647         };
 648     }
 649
 650     vpic->coded_buf = pic->output_buffer;
 651
 652     vpic->frame_num = priv->frame_num;
 653
 654     vpic->pic_fields.bits.idr_pic_flag       = (pic->type == PICTURE_TYPE_IDR);
 655     vpic->pic_fields.bits.reference_pic_flag = (pic->type != PICTURE_TYPE_B);
 656
 657     pic->nb_slices = 1;
 658
 659     return 0;
 660 }
 661
 662 static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
 663                                                VAAPIEncodePicture *pic,
 664                                                VAAPIEncodeSlice *slice)
 665 {
 666     VAAPIEncodeContext               *ctx = avctx->priv_data;
 667     VAAPIEncodeH264Context          *priv = ctx->priv_data;
 668     H264RawSPS                       *sps = &priv->sps;
 669     H264RawPPS                       *pps = &priv->pps;
 670     H264RawSliceHeader                *sh = &priv->slice.header;
 671     VAEncPictureParameterBufferH264 *vpic = pic->codec_picture_params;
 672     VAEncSliceParameterBufferH264 *vslice = slice->codec_slice_params;
 673     int i;
 674
 675     if (pic->type == PICTURE_TYPE_IDR) {
 676         sh->nal_unit_header.nal_unit_type = H264_NAL_IDR_SLICE;
 677         sh->nal_unit_header.nal_ref_idc   = 3;
 678     } else {
 679         sh->nal_unit_header.nal_unit_type = H264_NAL_SLICE;
 680         sh->nal_unit_header.nal_ref_idc   = pic->type != PICTURE_TYPE_B;
 681     }
 682
 683     // Only one slice per frame.
 684     sh->first_mb_in_slice = 0;
 685     sh->slice_type        = priv->slice_type;
 686
 687     sh->pic_parameter_set_id = pps->pic_parameter_set_id;
 688
 689     sh->frame_num  = priv->frame_num;
 690     sh->idr_pic_id = priv->idr_pic_count;
 691
 692     sh->pic_order_cnt_lsb = priv->pic_order_cnt &
 693         ((1 << (4 + sps->log2_max_pic_order_cnt_lsb_minus4)) - 1);
 694
 695     sh->direct_spatial_mv_pred_flag = 1;
 696
 697     if (pic->type == PICTURE_TYPE_B)
 698         sh->slice_qp_delta = priv->fixed_qp_b - (pps->pic_init_qp_minus26 + 26);
 699     else if (pic->type == PICTURE_TYPE_P)
 700         sh->slice_qp_delta = priv->fixed_qp_p - (pps->pic_init_qp_minus26 + 26);
 701     else
 702         sh->slice_qp_delta = priv->fixed_qp_idr - (pps->pic_init_qp_minus26 + 26);
 703
 704
 705     vslice->macroblock_address = sh->first_mb_in_slice;
 706     vslice->num_macroblocks    = priv->mb_width * priv->mb_height;
 707
 708     vslice->macroblock_info = VA_INVALID_ID;
 709
 710     vslice->slice_type           = sh->slice_type % 5;
 711     vslice->pic_parameter_set_id = sh->pic_parameter_set_id;
 712     vslice->idr_pic_id           = sh->idr_pic_id;
 713
 714     vslice->pic_order_cnt_lsb = sh->pic_order_cnt_lsb;
 715
 716     vslice->direct_spatial_mv_pred_flag = sh->direct_spatial_mv_pred_flag;
 717
 718     for (i = 0; i < FF_ARRAY_ELEMS(vslice->RefPicList0); i++) {
 719         vslice->RefPicList0[i].picture_id = VA_INVALID_ID;
 720         vslice->RefPicList0[i].flags      = VA_PICTURE_H264_INVALID;
 721         vslice->RefPicList1[i].picture_id = VA_INVALID_ID;
 722         vslice->RefPicList1[i].flags      = VA_PICTURE_H264_INVALID;
 723     }
 724
 725     av_assert0(pic->nb_refs <= 2);
 726     if (pic->nb_refs >= 1) {
 727         // Backward reference for P- or B-frame.
 728         av_assert0(pic->type == PICTURE_TYPE_P ||
 729                    pic->type == PICTURE_TYPE_B);
 730         vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
 731     }
 732     if (pic->nb_refs >= 2) {
 733         // Forward reference for B-frame.
 734         av_assert0(pic->type == PICTURE_TYPE_B);
 735         vslice->RefPicList1[0] = vpic->ReferenceFrames[1];
 736     }
 737
 738     vslice->slice_qp_delta = sh->slice_qp_delta;
 739
 740     return 0;
 741 }
 742
 743 static av_cold int vaapi_encode_h264_configure(AVCodecContext *avctx)
 744 {
 745     VAAPIEncodeContext      *ctx = avctx->priv_data;
 746     VAAPIEncodeH264Context *priv = ctx->priv_data;
 747     VAAPIEncodeH264Options  *opt = ctx->codec_options;
 748     int err;
 749
 750     err = ff_cbs_init(&priv->cbc, AV_CODEC_ID_H264, avctx);
 751     if (err < 0)
 752         return err;
 753
 754     priv->mb_width  = FFALIGN(avctx->width,  16) / 16;
 755     priv->mb_height = FFALIGN(avctx->height, 16) / 16;
 756
 757     if (ctx->va_rc_mode == VA_RC_CQP) {
 758         priv->fixed_qp_p = opt->qp;
 759         if (avctx->i_quant_factor > 0.0)
 760             priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
 761                                         avctx->i_quant_offset) + 0.5);
 762         else
 763             priv->fixed_qp_idr = priv->fixed_qp_p;
 764         if (avctx->b_quant_factor > 0.0)
 765             priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
 766                                       avctx->b_quant_offset) + 0.5);
 767         else
 768             priv->fixed_qp_b = priv->fixed_qp_p;
 769
 770         opt->sei &= ~SEI_TIMING;
 771
 772         av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
 773                "%d / %d / %d for IDR- / P- / B-frames.\n",
 774                priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
 775
 776     } else if (ctx->va_rc_mode == VA_RC_CBR ||
 777                ctx->va_rc_mode == VA_RC_VBR) {
 778         // These still need to be  set for pic_init_qp/slice_qp_delta.
 779         priv->fixed_qp_idr = 26;
 780         priv->fixed_qp_p   = 26;
 781         priv->fixed_qp_b   = 26;
 782
 783         av_log(avctx, AV_LOG_DEBUG, "Using %s-bitrate = %"PRId64" bps.\n",
 784                ctx->va_rc_mode == VA_RC_CBR ? "constant" : "variable",
 785                avctx->bit_rate);
 786
 787     } else {
 788         av_assert0(0 && "Invalid RC mode.");
 789     }
 790
 791     if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
 792         avctx->compression_level = opt->quality;
 793
 794     if (opt->sei & SEI_IDENTIFIER) {
 795         const char *lavc  = LIBAVCODEC_IDENT;
 796         const char *vaapi = VA_VERSION_S;
 797         const char *driver;
 798         int len;
 799
 800         memcpy(priv->identifier.uuid_iso_iec_11578,
 801                vaapi_encode_h264_sei_identifier_uuid,
 802                sizeof(priv->identifier.uuid_iso_iec_11578));
 803
 804         driver = vaQueryVendorString(ctx->hwctx->display);
 805         if (!driver)
 806             driver = "unknown driver";
 807
 808         len = snprintf(NULL, 0, "%s / VAAPI %s / %s", lavc, vaapi, driver);
 809         if (len >= 0) {
 810             priv->identifier_string = av_malloc(len + 1);
 811             if (!priv->identifier_string)
 812                 return AVERROR(ENOMEM);
 813
 814             snprintf(priv->identifier_string, len + 1,
 815                      "%s / VAAPI %s / %s", lavc, vaapi, driver);
 816
 817             priv->identifier.data = priv->identifier_string;
 818             priv->identifier.data_length = len + 1;
 819         }
 820     }
 821
 822     return 0;
 823 }
 824
 825 static const VAAPIEncodeType vaapi_encode_type_h264 = {
 826     .priv_data_size        = sizeof(VAAPIEncodeH264Context),
 827
 828     .configure             = &vaapi_encode_h264_configure,
 829
 830     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferH264),
 831     .init_sequence_params  = &vaapi_encode_h264_init_sequence_params,
 832
 833     .picture_params_size   = sizeof(VAEncPictureParameterBufferH264),
 834     .init_picture_params   = &vaapi_encode_h264_init_picture_params,
 835
 836     .slice_params_size     = sizeof(VAEncSliceParameterBufferH264),
 837     .init_slice_params     = &vaapi_encode_h264_init_slice_params,
 838
 839     .sequence_header_type  = VAEncPackedHeaderSequence,
 840     .write_sequence_header = &vaapi_encode_h264_write_sequence_header,
 841
 842     .slice_header_type     = VAEncPackedHeaderH264_Slice,
 843     .write_slice_header    = &vaapi_encode_h264_write_slice_header,
 844
 845     .write_extra_header    = &vaapi_encode_h264_write_extra_header,
 846 };
 847
 848 static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
 849 {
 850     VAAPIEncodeContext     *ctx = avctx->priv_data;
 851     VAAPIEncodeH264Options *opt =
 852         (VAAPIEncodeH264Options*)ctx->codec_options_data;
 853
 854     ctx->codec = &vaapi_encode_type_h264;
 855
 856     switch (avctx->profile) {
 857     case FF_PROFILE_H264_BASELINE:
 858         av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
 859                "supported, using constrained baseline profile instead.\n");
 860         avctx->profile = FF_PROFILE_H264_CONSTRAINED_BASELINE;
 861     case FF_PROFILE_H264_CONSTRAINED_BASELINE:
 862         ctx->va_profile = VAProfileH264ConstrainedBaseline;
 863         if (avctx->max_b_frames != 0) {
 864             avctx->max_b_frames = 0;
 865             av_log(avctx, AV_LOG_WARNING, "H.264 constrained baseline profile "
 866                    "doesn't support encoding with B frames, disabling them.\n");
 867         }
 868         break;
 869     case FF_PROFILE_H264_MAIN:
 870         ctx->va_profile = VAProfileH264Main;
 871         break;
 872     case FF_PROFILE_H264_EXTENDED:
 873         av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
 874                "is not supported.\n");
 875         return AVERROR_PATCHWELCOME;
 876     case FF_PROFILE_UNKNOWN:
 877     case FF_PROFILE_H264_HIGH:
 878         ctx->va_profile = VAProfileH264High;
 879         break;
 880     case FF_PROFILE_H264_HIGH_10:
 881     case FF_PROFILE_H264_HIGH_10_INTRA:
 882         av_log(avctx, AV_LOG_ERROR, "H.264 10-bit profiles "
 883                "are not supported.\n");
 884         return AVERROR_PATCHWELCOME;
 885     case FF_PROFILE_H264_HIGH_422:
 886     case FF_PROFILE_H264_HIGH_422_INTRA:
 887     case FF_PROFILE_H264_HIGH_444:
 888     case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
 889     case FF_PROFILE_H264_HIGH_444_INTRA:
 890     case FF_PROFILE_H264_CAVLC_444:
 891         av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
 892                "are not supported.\n");
 893         return AVERROR_PATCHWELCOME;
 894     default:
 895         av_log(avctx, AV_LOG_ERROR, "Unknown H.264 profile %d.\n",
 896                avctx->profile);
 897         return AVERROR(EINVAL);
 898     }
 899     if (opt->low_power) {
 900 #if VA_CHECK_VERSION(0, 39, 2)
 901         ctx->va_entrypoint = VAEntrypointEncSliceLP;
 902 #else
 903         av_log(avctx, AV_LOG_ERROR, "Low-power encoding is not "
 904                "supported with this VAAPI version.\n");
 905         return AVERROR(EINVAL);
 906 #endif
 907     } else {
 908         ctx->va_entrypoint = VAEntrypointEncSlice;
 909     }
 910
 911     // Only 8-bit encode is supported.
 912     ctx->va_rt_format = VA_RT_FORMAT_YUV420;
 913
 914     if (avctx->bit_rate > 0) {
 915         if (avctx->rc_max_rate == avctx->bit_rate)
 916             ctx->va_rc_mode = VA_RC_CBR;
 917         else
 918             ctx->va_rc_mode = VA_RC_VBR;
 919     } else
 920         ctx->va_rc_mode = VA_RC_CQP;
 921
 922     ctx->va_packed_headers =
 923         VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
 924         VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
 925         VA_ENC_PACKED_HEADER_MISC;      // SEI.
 926
 927     ctx->surface_width  = FFALIGN(avctx->width,  16);
 928     ctx->surface_height = FFALIGN(avctx->height, 16);
 929
 930     return ff_vaapi_encode_init(avctx);
 931 }
 932
 933 static av_cold int vaapi_encode_h264_close(AVCodecContext *avctx)
 934 {
 935     VAAPIEncodeContext *ctx = avctx->priv_data;
 936     VAAPIEncodeH264Context *priv = ctx->priv_data;
 937
 938     if (priv) {
 939         ff_cbs_close(&priv->cbc);
 940         av_freep(&priv->identifier_string);
 941     }
 942
 943     return ff_vaapi_encode_close(avctx);
 944 }
 945
 946 #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \
 947                    offsetof(VAAPIEncodeH264Options, x))
 948 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 949 static const AVOption vaapi_encode_h264_options[] = {
 950     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
 951       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
 952     { "quality", "Set encode quality (trades off against speed, higher is faster)",
 953       OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8, FLAGS },
 954     { "low_power", "Use low-power encoding mode (experimental: only supported "
 955       "on some platforms, does not support all features)",
 956       OFFSET(low_power), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
 957     { "coder", "Entropy coder type",
 958       OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS, "coder" },
 959         { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
 960         { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
 961         { "vlc",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS, "coder" },
 962         { "ac",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, FLAGS, "coder" },
 963
 964     { "aud", "Include AUD",
 965       OFFSET(aud), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
 966
 967     { "sei", "Set SEI to include",
 968       OFFSET(sei), AV_OPT_TYPE_FLAGS,
 969       { .i64 = SEI_IDENTIFIER | SEI_TIMING },
 970       0, INT_MAX, FLAGS, "sei" },
 971     { "identifier", "Include encoder version identifier",
 972       0, AV_OPT_TYPE_CONST, { .i64 = SEI_IDENTIFIER },
 973       INT_MIN, INT_MAX, FLAGS, "sei" },
 974     { "timing", "Include timing parameters (buffering_period and pic_timing)",
 975       0, AV_OPT_TYPE_CONST, { .i64 = SEI_TIMING },
 976       INT_MIN, INT_MAX, FLAGS, "sei" },
 977     { NULL },
 978 };
 979
 980 static const AVCodecDefault vaapi_encode_h264_defaults[] = {
 981     { "profile",        "100" },
 982     { "level",          "51"  },
 983     { "b",              "0"   },
 984     { "bf",             "2"   },
 985     { "g",              "120" },
 986     { "i_qfactor",      "1"   },
 987     { "i_qoffset",      "0"   },
 988     { "b_qfactor",      "6/5" },
 989     { "b_qoffset",      "0"   },
 990     { "qmin",           "0"   },
 991     { NULL },
 992 };
 993
 994 static const AVClass vaapi_encode_h264_class = {
 995     .class_name = "h264_vaapi",
 996     .item_name  = av_default_item_name,
 997     .option     = vaapi_encode_h264_options,
 998     .version    = LIBAVUTIL_VERSION_INT,
 999 };
1000
1001 AVCodec ff_h264_vaapi_encoder = {
1002     .name           = "h264_vaapi",
1003     .long_name      = NULL_IF_CONFIG_SMALL("H.264/AVC (VAAPI)"),
1004     .type           = AVMEDIA_TYPE_VIDEO,
1005     .id             = AV_CODEC_ID_H264,
1006     .priv_data_size = (sizeof(VAAPIEncodeContext) +
1007                        sizeof(VAAPIEncodeH264Options)),
1008     .init           = &vaapi_encode_h264_init,
1009     .encode2        = &ff_vaapi_encode2,
1010     .close          = &vaapi_encode_h264_close,
1011     .priv_class     = &vaapi_encode_h264_class,
1012     .capabilities   = AV_CODEC_CAP_DELAY,
1013     .defaults       = vaapi_encode_h264_defaults,
1014     .pix_fmts = (const enum AVPixelFormat[]) {
1015         AV_PIX_FMT_VAAPI,
1016         AV_PIX_FMT_NONE,
1017     },
1018 };