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FFmpeg/libavcodec/vaapi_encode_h265.c

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  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 <va/va.h>

  20. #include <va/va_enc_hevc.h>

  21. 

  22. #include "libavutil/avassert.h"

  23. #include "libavutil/internal.h"

  24. #include "libavutil/opt.h"

  25. #include "libavutil/pixfmt.h"

  26. 

  27. #include "avcodec.h"

  28. #include "hevc.h"

  29. #include "internal.h"

  30. #include "put_bits.h"

  31. #include "vaapi_encode.h"

  32. #include "vaapi_encode_h26x.h"

  33. 

  34. 

  35. #define MAX_ST_REF_PIC_SETS  32

  36. #define MAX_DPB_PICS         16

  37. #define MAX_LAYERS            1

  38. 

  39. 

  40. typedef struct VAAPIEncodeH265STRPS {

  41.     char inter_ref_pic_set_prediction_flag;

  42. 

  43.     unsigned int num_negative_pics;

  44.     unsigned int num_positive_pics;

  45. 

  46.     unsigned int delta_poc_s0_minus1[MAX_DPB_PICS];

  47.     char used_by_curr_pic_s0_flag[MAX_DPB_PICS];

  48. 

  49.     unsigned int delta_poc_s1_minus1[MAX_DPB_PICS];

  50.     char used_by_curr_pic_s1_flag[MAX_DPB_PICS];

  51. } VAAPIEncodeH265STRPS;

  52. 

  53. // This structure contains all possibly-useful per-sequence syntax elements

  54. // which are not already contained in the various VAAPI structures.

  55. typedef struct VAAPIEncodeH265MiscSequenceParams {

  56. 

  57.     // Parameter set IDs.

  58.     unsigned int video_parameter_set_id;

  59.     unsigned int seq_parameter_set_id;

  60. 

  61.     // Layering.

  62.     unsigned int vps_max_layers_minus1;

  63.     unsigned int vps_max_sub_layers_minus1;

  64.     char vps_temporal_id_nesting_flag;

  65.     unsigned int vps_max_layer_id;

  66.     unsigned int vps_num_layer_sets_minus1;

  67.     unsigned int sps_max_sub_layers_minus1;

  68.     char sps_temporal_id_nesting_flag;

  69.     char layer_id_included_flag[MAX_LAYERS][64];

  70. 

  71.     // Profile/tier/level parameters.

  72.     char general_profile_compatibility_flag[32];

  73.     char general_progressive_source_flag;

  74.     char general_interlaced_source_flag;

  75.     char general_non_packed_constraint_flag;

  76.     char general_frame_only_constraint_flag;

  77.     char general_inbld_flag;

  78. 

  79.     // Decode/display ordering parameters.

  80.     unsigned int log2_max_pic_order_cnt_lsb_minus4;

  81.     char vps_sub_layer_ordering_info_present_flag;

  82.     unsigned int vps_max_dec_pic_buffering_minus1[MAX_LAYERS];

  83.     unsigned int vps_max_num_reorder_pics[MAX_LAYERS];

  84.     unsigned int vps_max_latency_increase_plus1[MAX_LAYERS];

  85.     char sps_sub_layer_ordering_info_present_flag;

  86.     unsigned int sps_max_dec_pic_buffering_minus1[MAX_LAYERS];

  87.     unsigned int sps_max_num_reorder_pics[MAX_LAYERS];

  88.     unsigned int sps_max_latency_increase_plus1[MAX_LAYERS];

  89. 

  90.     // Timing information.

  91.     char vps_timing_info_present_flag;

  92.     unsigned int vps_num_units_in_tick;

  93.     unsigned int vps_time_scale;

  94.     char vps_poc_proportional_to_timing_flag;

  95.     unsigned int vps_num_ticks_poc_diff_minus1;

  96. 

  97.     // Cropping information.

  98.     char conformance_window_flag;

  99.     unsigned int conf_win_left_offset;

  100.     unsigned int conf_win_right_offset;

  101.     unsigned int conf_win_top_offset;

  102.     unsigned int conf_win_bottom_offset;

  103. 

  104.     // Short-term reference picture sets.

  105.     unsigned int num_short_term_ref_pic_sets;

  106.     VAAPIEncodeH265STRPS st_ref_pic_set[MAX_ST_REF_PIC_SETS];

  107. 

  108.     // Long-term reference pictures.

  109.     char long_term_ref_pics_present_flag;

  110.     unsigned int num_long_term_ref_pics_sps;

  111.     struct {

  112.         unsigned int lt_ref_pic_poc_lsb_sps;

  113.         char used_by_curr_pic_lt_sps_flag;

  114.     } lt_ref_pic;

  115. 

  116.     // Deblocking filter control.

  117.     char deblocking_filter_control_present_flag;

  118.     char deblocking_filter_override_enabled_flag;

  119.     char pps_deblocking_filter_disabled_flag;

  120.     int pps_beta_offset_div2;

  121.     int pps_tc_offset_div2;

  122. 

  123.     // Video Usability Information.

  124.     char vui_parameters_present_flag;

  125.     char aspect_ratio_info_present_flag;

  126.     unsigned int aspect_ratio_idc;

  127.     unsigned int sar_width;

  128.     unsigned int sar_height;

  129.     char video_signal_type_present_flag;

  130.     unsigned int video_format;

  131.     char video_full_range_flag;

  132.     char colour_description_present_flag;

  133.     unsigned int colour_primaries;

  134.     unsigned int transfer_characteristics;

  135.     unsigned int matrix_coeffs;

  136. 

  137.     // Oddments.

  138.     char uniform_spacing_flag;

  139.     char output_flag_present_flag;

  140.     char cabac_init_present_flag;

  141.     unsigned int num_extra_slice_header_bits;

  142.     char lists_modification_present_flag;

  143.     char pps_slice_chroma_qp_offsets_present_flag;

  144.     char pps_slice_chroma_offset_list_enabled_flag;

  145. } VAAPIEncodeH265MiscSequenceParams;

  146. 

  147. // This structure contains all possibly-useful per-slice syntax elements

  148. // which are not already contained in the various VAAPI structures.

  149. typedef struct VAAPIEncodeH265MiscSliceParams {

  150.     // Slice segments.

  151.     char first_slice_segment_in_pic_flag;

  152.     unsigned int slice_segment_address;

  153. 

  154.     // Short-term reference picture sets.

  155.     char short_term_ref_pic_set_sps_flag;

  156.     unsigned int short_term_ref_pic_idx;

  157.     VAAPIEncodeH265STRPS st_ref_pic_set;

  158. 

  159.     // Deblocking filter.

  160.     char deblocking_filter_override_flag;

  161. 

  162.     // Oddments.

  163.     char slice_reserved_flag[8];

  164.     char no_output_of_prior_pics_flag;

  165.     char pic_output_flag;

  166. } VAAPIEncodeH265MiscSliceParams;

  167. 

  168. typedef struct VAAPIEncodeH265Slice {

  169.     VAAPIEncodeH265MiscSliceParams misc_slice_params;

  170. 

  171.     int64_t pic_order_cnt;

  172. } VAAPIEncodeH265Slice;

  173. 

  174. typedef struct VAAPIEncodeH265Context {

  175.     VAAPIEncodeH265MiscSequenceParams misc_sequence_params;

  176. 

  177.     unsigned int ctu_width;

  178.     unsigned int ctu_height;

  179. 

  180.     int fixed_qp_idr;

  181.     int fixed_qp_p;

  182.     int fixed_qp_b;

  183. 

  184.     int64_t last_idr_frame;

  185. 

  186.     // Rate control configuration.

  187.     struct {

  188.         VAEncMiscParameterBuffer misc;

  189.         VAEncMiscParameterRateControl rc;

  190.     } rc_params;

  191.     struct {

  192.         VAEncMiscParameterBuffer misc;

  193.         VAEncMiscParameterHRD hrd;

  194.     } hrd_params;

  195. } VAAPIEncodeH265Context;

  196. 

  197. typedef struct VAAPIEncodeH265Options {

  198.     int qp;

  199. } VAAPIEncodeH265Options;

  200. 

  201. 

  202. #define vseq_var(name)     vseq->name, name

  203. #define vseq_field(name)   vseq->seq_fields.bits.name, name

  204. #define vpic_var(name)     vpic->name, name

  205. #define vpic_field(name)   vpic->pic_fields.bits.name, name

  206. #define vslice_var(name)   vslice->name, name

  207. #define vslice_field(name) vslice->slice_fields.bits.name, name

  208. #define mseq_var(name)     mseq->name, name

  209. #define mslice_var(name)   mslice->name, name

  210. #define mstrps_var(name)   mstrps->name, name

  211. 

  212. static void vaapi_encode_h265_write_nal_unit_header(PutBitContext *pbc,

  213.                                                     int nal_unit_type)

  214. {

  215.     u(1, 0, forbidden_zero_bit);

  216.     u(6, nal_unit_type, nal_unit_type);

  217.     u(6, 0, nuh_layer_id);

  218.     u(3, 1, nuh_temporal_id_plus1);

  219. }

  220. 

  221. static void vaapi_encode_h265_write_rbsp_trailing_bits(PutBitContext *pbc)

  222. {

  223.     u(1, 1, rbsp_stop_one_bit);

  224.     while (put_bits_count(pbc) & 7)

  225.         u(1, 0, rbsp_alignment_zero_bit);

  226. }

  227. 

  228. static void vaapi_encode_h265_write_profile_tier_level(PutBitContext *pbc,

  229.                                                        VAAPIEncodeContext *ctx)

  230. {

  231.     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;

  232.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  233.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  234.     int j;

  235. 

  236.     if (1) {

  237.         u(2, 0, general_profile_space);

  238.         u(1, vseq_var(general_tier_flag));

  239.         u(5, vseq_var(general_profile_idc));

  240. 

  241.         for (j = 0; j < 32; j++) {

  242.             u(1, mseq_var(general_profile_compatibility_flag[j]));

  243.         }

  244. 

  245.         u(1, mseq_var(general_progressive_source_flag));

  246.         u(1, mseq_var(general_interlaced_source_flag));

  247.         u(1, mseq_var(general_non_packed_constraint_flag));

  248.         u(1, mseq_var(general_frame_only_constraint_flag));

  249. 

  250.         if (0) {

  251.             // Not main profile.

  252.             // Lots of extra constraint flags.

  253.         } else {

  254.             // put_bits only handles up to 31 bits.

  255.             u(23, 0, general_reserved_zero_43bits);

  256.             u(20, 0, general_reserved_zero_43bits);

  257.         }

  258. 

  259.         if (vseq->general_profile_idc >= 1 && vseq->general_profile_idc <= 5) {

  260.             u(1, mseq_var(general_inbld_flag));

  261.         } else {

  262.             u(1, 0, general_reserved_zero_bit);

  263.         }

  264.     }

  265. 

  266.     u(8, vseq_var(general_level_idc));

  267. 

  268.     // No sublayers.

  269. }

  270. 

  271. static void vaapi_encode_h265_write_vps(PutBitContext *pbc,

  272.                                         VAAPIEncodeContext *ctx)

  273. {

  274.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  275.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  276.     int i, j;

  277. 

  278.     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_VPS);

  279. 

  280.     u(4, mseq->video_parameter_set_id, vps_video_parameter_set_id);

  281. 

  282.     u(1, 1, vps_base_layer_internal_flag);

  283.     u(1, 1, vps_base_layer_available_flag);

  284.     u(6, mseq_var(vps_max_layers_minus1));

  285.     u(3, mseq_var(vps_max_sub_layers_minus1));

  286.     u(1, mseq_var(vps_temporal_id_nesting_flag));

  287. 

  288.     u(16, 0xffff, vps_reserved_0xffff_16bits);

  289. 

  290.     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);

  291. 

  292.     u(1, mseq_var(vps_sub_layer_ordering_info_present_flag));

  293.     for (i = (mseq->vps_sub_layer_ordering_info_present_flag ?

  294.               0 : mseq->vps_max_sub_layers_minus1);

  295.          i <= mseq->vps_max_sub_layers_minus1; i++) {

  296.         ue(mseq_var(vps_max_dec_pic_buffering_minus1[i]));

  297.         ue(mseq_var(vps_max_num_reorder_pics[i]));

  298.         ue(mseq_var(vps_max_latency_increase_plus1[i]));

  299.     }

  300. 

  301.     u(6, mseq_var(vps_max_layer_id));

  302.     ue(mseq_var(vps_num_layer_sets_minus1));

  303.     for (i = 1; i <= mseq->vps_num_layer_sets_minus1; i++) {

  304.         for (j = 0; j < mseq->vps_max_layer_id; j++)

  305.             u(1, mseq_var(layer_id_included_flag[i][j]));

  306.     }

  307. 

  308.     u(1, mseq_var(vps_timing_info_present_flag));

  309.     if (mseq->vps_timing_info_present_flag) {

  310.         u(1, 0, put_bits_hack_zero_bit);

  311.         u(31, mseq_var(vps_num_units_in_tick));

  312.         u(1, 0, put_bits_hack_zero_bit);

  313.         u(31, mseq_var(vps_time_scale));

  314.         u(1, mseq_var(vps_poc_proportional_to_timing_flag));

  315.         if (mseq->vps_poc_proportional_to_timing_flag) {

  316.             ue(mseq_var(vps_num_ticks_poc_diff_minus1));

  317.         }

  318.         ue(0, vps_num_hrd_parameters);

  319.     }

  320. 

  321.     u(1, 0, vps_extension_flag);

  322. 

  323.     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);

  324. }

  325. 

  326. static void vaapi_encode_h265_write_st_ref_pic_set(PutBitContext *pbc,

  327.                                                    int st_rps_idx,

  328.                                                    VAAPIEncodeH265STRPS *mstrps)

  329. {

  330.     int i;

  331. 

  332.     if (st_rps_idx != 0)

  333.        u(1, mstrps_var(inter_ref_pic_set_prediction_flag));

  334. 

  335.     if (mstrps->inter_ref_pic_set_prediction_flag) {

  336.         av_assert0(0 && "inter ref pic set prediction not supported");

  337.     } else {

  338.         ue(mstrps_var(num_negative_pics));

  339.         ue(mstrps_var(num_positive_pics));

  340. 

  341.         for (i = 0; i < mstrps->num_negative_pics; i++) {

  342.             ue(mstrps_var(delta_poc_s0_minus1[i]));

  343.             u(1, mstrps_var(used_by_curr_pic_s0_flag[i]));

  344.         }

  345.         for (i = 0; i < mstrps->num_positive_pics; i++) {

  346.             ue(mstrps_var(delta_poc_s1_minus1[i]));

  347.             u(1, mstrps_var(used_by_curr_pic_s1_flag[i]));

  348.         }

  349.     }

  350. }

  351. 

  352. static void vaapi_encode_h265_write_vui_parameters(PutBitContext *pbc,

  353.                                                    VAAPIEncodeContext *ctx)

  354. {

  355.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  356.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  357. 

  358.     u(1, mseq_var(aspect_ratio_info_present_flag));

  359.     if (mseq->aspect_ratio_info_present_flag) {

  360.         u(8, mseq_var(aspect_ratio_idc));

  361.         if (mseq->aspect_ratio_idc == 255) {

  362.             u(16, mseq_var(sar_width));

  363.             u(16, mseq_var(sar_height));

  364.         }

  365.     }

  366. 

  367.     u(1, 0, overscan_info_present_flag);

  368. 

  369.     u(1, mseq_var(video_signal_type_present_flag));

  370.     if (mseq->video_signal_type_present_flag) {

  371.         u(3, mseq_var(video_format));

  372.         u(1, mseq_var(video_full_range_flag));

  373.         u(1, mseq_var(colour_description_present_flag));

  374.         if (mseq->colour_description_present_flag) {

  375.             u(8, mseq_var(colour_primaries));

  376.             u(8, mseq_var(transfer_characteristics));

  377.             u(8, mseq_var(matrix_coeffs));

  378.         }

  379.     }

  380. 

  381.     u(1, 0, chroma_loc_info_present_flag);

  382.     u(1, 0, neutral_chroma_indication_flag);

  383.     u(1, 0, field_seq_flag);

  384.     u(1, 0, frame_field_info_present_flag);

  385.     u(1, 0, default_display_window_flag);

  386.     u(1, 0, vui_timing_info_present_flag);

  387.     u(1, 0, bitstream_restriction_flag_flag);

  388. }

  389. 

  390. static void vaapi_encode_h265_write_sps(PutBitContext *pbc,

  391.                                         VAAPIEncodeContext *ctx)

  392. {

  393.     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;

  394.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  395.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  396.     int i;

  397. 

  398.     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_SPS);

  399. 

  400.     u(4, mseq->video_parameter_set_id, sps_video_parameter_set_id);

  401. 

  402.     u(3, mseq_var(sps_max_sub_layers_minus1));

  403.     u(1, mseq_var(sps_temporal_id_nesting_flag));

  404. 

  405.     vaapi_encode_h265_write_profile_tier_level(pbc, ctx);

  406. 

  407.     ue(mseq->seq_parameter_set_id, sps_seq_parameter_set_id);

  408.     ue(vseq_field(chroma_format_idc));

  409.     if (vseq->seq_fields.bits.chroma_format_idc == 3)

  410.         u(1, 0, separate_colour_plane_flag);

  411. 

  412.     ue(vseq_var(pic_width_in_luma_samples));

  413.     ue(vseq_var(pic_height_in_luma_samples));

  414. 

  415.     u(1, mseq_var(conformance_window_flag));

  416.     if (mseq->conformance_window_flag) {

  417.         ue(mseq_var(conf_win_left_offset));

  418.         ue(mseq_var(conf_win_right_offset));

  419.         ue(mseq_var(conf_win_top_offset));

  420.         ue(mseq_var(conf_win_bottom_offset));

  421.     }

  422. 

  423.     ue(vseq_field(bit_depth_luma_minus8));

  424.     ue(vseq_field(bit_depth_chroma_minus8));

  425. 

  426.     ue(mseq_var(log2_max_pic_order_cnt_lsb_minus4));

  427. 

  428.     u(1, mseq_var(sps_sub_layer_ordering_info_present_flag));

  429.     for (i = (mseq->sps_sub_layer_ordering_info_present_flag ?

  430.               0 : mseq->sps_max_sub_layers_minus1);

  431.          i <= mseq->sps_max_sub_layers_minus1; i++) {

  432.         ue(mseq_var(sps_max_dec_pic_buffering_minus1[i]));

  433.         ue(mseq_var(sps_max_num_reorder_pics[i]));

  434.         ue(mseq_var(sps_max_latency_increase_plus1[i]));

  435.     }

  436. 

  437.     ue(vseq_var(log2_min_luma_coding_block_size_minus3));

  438.     ue(vseq_var(log2_diff_max_min_luma_coding_block_size));

  439.     ue(vseq_var(log2_min_transform_block_size_minus2));

  440.     ue(vseq_var(log2_diff_max_min_transform_block_size));

  441.     ue(vseq_var(max_transform_hierarchy_depth_inter));

  442.     ue(vseq_var(max_transform_hierarchy_depth_intra));

  443. 

  444.     u(1, vseq_field(scaling_list_enabled_flag));

  445.     if (vseq->seq_fields.bits.scaling_list_enabled_flag) {

  446.         u(1, 0, sps_scaling_list_data_present_flag);

  447.     }

  448. 

  449.     u(1, vseq_field(amp_enabled_flag));

  450.     u(1, vseq_field(sample_adaptive_offset_enabled_flag));

  451. 

  452.     u(1, vseq_field(pcm_enabled_flag));

  453.     if (vseq->seq_fields.bits.pcm_enabled_flag) {

  454.         u(4, vseq_var(pcm_sample_bit_depth_luma_minus1));

  455.         u(4, vseq_var(pcm_sample_bit_depth_chroma_minus1));

  456.         ue(vseq_var(log2_min_pcm_luma_coding_block_size_minus3));

  457.         ue(vseq->log2_max_pcm_luma_coding_block_size_minus3 -

  458.            vseq->log2_min_pcm_luma_coding_block_size_minus3,

  459.            log2_diff_max_min_pcm_luma_coding_block_size);

  460.         u(1, vseq_field(pcm_loop_filter_disabled_flag));

  461.     }

  462. 

  463.     ue(mseq_var(num_short_term_ref_pic_sets));

  464.     for (i = 0; i < mseq->num_short_term_ref_pic_sets; i++)

  465.         vaapi_encode_h265_write_st_ref_pic_set(pbc, i,

  466.                                                &mseq->st_ref_pic_set[i]);

  467. 

  468.     u(1, mseq_var(long_term_ref_pics_present_flag));

  469.     if (mseq->long_term_ref_pics_present_flag) {

  470.         ue(0, num_long_term_ref_pics_sps);

  471.     }

  472. 

  473.     u(1, vseq_field(sps_temporal_mvp_enabled_flag));

  474.     u(1, vseq_field(strong_intra_smoothing_enabled_flag));

  475. 

  476.     u(1, mseq_var(vui_parameters_present_flag));

  477.     if (mseq->vui_parameters_present_flag) {

  478.         vaapi_encode_h265_write_vui_parameters(pbc, ctx);

  479.     }

  480. 

  481.     u(1, 0, sps_extension_present_flag);

  482. 

  483.     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);

  484. }

  485. 

  486. static void vaapi_encode_h265_write_pps(PutBitContext *pbc,

  487.                                         VAAPIEncodeContext *ctx)

  488. {

  489.     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;

  490.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  491.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  492.     int i;

  493. 

  494.     vaapi_encode_h265_write_nal_unit_header(pbc, NAL_PPS);

  495. 

  496.     ue(vpic->slice_pic_parameter_set_id, pps_pic_parameter_set_id);

  497.     ue(mseq->seq_parameter_set_id, pps_seq_parameter_set_id);

  498. 

  499.     u(1, vpic_field(dependent_slice_segments_enabled_flag));

  500.     u(1, mseq_var(output_flag_present_flag));

  501.     u(3, mseq_var(num_extra_slice_header_bits));

  502.     u(1, vpic_field(sign_data_hiding_enabled_flag));

  503.     u(1, mseq_var(cabac_init_present_flag));

  504. 

  505.     ue(vpic_var(num_ref_idx_l0_default_active_minus1));

  506.     ue(vpic_var(num_ref_idx_l1_default_active_minus1));

  507. 

  508.     se(vpic->pic_init_qp - 26, init_qp_minus26);

  509. 

  510.     u(1, vpic_field(constrained_intra_pred_flag));

  511.     u(1, vpic_field(transform_skip_enabled_flag));

  512. 

  513.     u(1, vpic_field(cu_qp_delta_enabled_flag));

  514.     if (vpic->pic_fields.bits.cu_qp_delta_enabled_flag)

  515.         ue(vpic_var(diff_cu_qp_delta_depth));

  516. 

  517.     se(vpic_var(pps_cb_qp_offset));

  518.     se(vpic_var(pps_cr_qp_offset));

  519. 

  520.     u(1, mseq_var(pps_slice_chroma_qp_offsets_present_flag));

  521.     u(1, vpic_field(weighted_pred_flag));

  522.     u(1, vpic_field(weighted_bipred_flag));

  523.     u(1, vpic_field(transquant_bypass_enabled_flag));

  524.     u(1, vpic_field(tiles_enabled_flag));

  525.     u(1, vpic_field(entropy_coding_sync_enabled_flag));

  526. 

  527.     if (vpic->pic_fields.bits.tiles_enabled_flag) {

  528.         ue(vpic_var(num_tile_columns_minus1));

  529.         ue(vpic_var(num_tile_rows_minus1));

  530.         u(1, mseq_var(uniform_spacing_flag));

  531.         if (!mseq->uniform_spacing_flag) {

  532.             for (i = 0; i < vpic->num_tile_columns_minus1; i++)

  533.                 ue(vpic_var(column_width_minus1[i]));

  534.             for (i = 0; i < vpic->num_tile_rows_minus1; i++)

  535.                 ue(vpic_var(row_height_minus1[i]));

  536.         }

  537.         u(1, vpic_field(loop_filter_across_tiles_enabled_flag));

  538.     }

  539. 

  540.     u(1, vpic_field(pps_loop_filter_across_slices_enabled_flag));

  541.     u(1, mseq_var(deblocking_filter_control_present_flag));

  542.     if (mseq->deblocking_filter_control_present_flag) {

  543.         u(1, mseq_var(deblocking_filter_override_enabled_flag));

  544.         u(1, mseq_var(pps_deblocking_filter_disabled_flag));

  545.         if (!mseq->pps_deblocking_filter_disabled_flag) {

  546.             se(mseq_var(pps_beta_offset_div2));

  547.             se(mseq_var(pps_tc_offset_div2));

  548.         }

  549.     }

  550. 

  551.     u(1, 0, pps_scaling_list_data_present_flag);

  552.     // No scaling list data.

  553. 

  554.     u(1, mseq_var(lists_modification_present_flag));

  555.     ue(vpic_var(log2_parallel_merge_level_minus2));

  556.     u(1, 0, slice_segment_header_extension_present_flag);

  557.     u(1, 0, pps_extension_present_flag);

  558. 

  559.     vaapi_encode_h265_write_rbsp_trailing_bits(pbc);

  560. }

  561. 

  562. static void vaapi_encode_h265_write_slice_header2(PutBitContext *pbc,

  563.                                                   VAAPIEncodeContext *ctx,

  564.                                                   VAAPIEncodePicture *pic,

  565.                                                   VAAPIEncodeSlice *slice)

  566. {

  567.     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;

  568.     VAEncPictureParameterBufferHEVC   *vpic = pic->codec_picture_params;

  569.     VAEncSliceParameterBufferHEVC   *vslice = slice->codec_slice_params;

  570.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  571.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  572.     VAAPIEncodeH265Slice            *pslice = slice->priv_data;

  573.     VAAPIEncodeH265MiscSliceParams  *mslice = &pslice->misc_slice_params;

  574.     int i;

  575. 

  576.     vaapi_encode_h265_write_nal_unit_header(pbc, vpic->nal_unit_type);

  577. 

  578.     u(1, mslice_var(first_slice_segment_in_pic_flag));

  579.     if (vpic->nal_unit_type >= NAL_BLA_W_LP &&

  580.        vpic->nal_unit_type <= 23)

  581.         u(1, mslice_var(no_output_of_prior_pics_flag));

  582. 

  583.     ue(vslice_var(slice_pic_parameter_set_id));

  584. 

  585.     if (!mslice->first_slice_segment_in_pic_flag) {

  586.         if (vpic->pic_fields.bits.dependent_slice_segments_enabled_flag)

  587.             u(1, vslice_field(dependent_slice_segment_flag));

  588.         u(av_log2((priv->ctu_width * priv->ctu_height) - 1) + 1,

  589.           mslice_var(slice_segment_address));

  590.     }

  591.     if (!vslice->slice_fields.bits.dependent_slice_segment_flag) {

  592.         for (i = 0; i < mseq->num_extra_slice_header_bits; i++)

  593.             u(1, mslice_var(slice_reserved_flag[i]));

  594. 

  595.         ue(vslice_var(slice_type));

  596.         if (mseq->output_flag_present_flag)

  597.             u(1, 1, pic_output_flag);

  598.         if (vseq->seq_fields.bits.separate_colour_plane_flag)

  599.             u(2, vslice_field(colour_plane_id));

  600.         if (vpic->nal_unit_type != NAL_IDR_W_RADL &&

  601.            vpic->nal_unit_type != NAL_IDR_N_LP) {

  602.             u(4 + mseq->log2_max_pic_order_cnt_lsb_minus4,

  603.               (pslice->pic_order_cnt &

  604.                ((1 << (mseq->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1)),

  605.               slice_pic_order_cnt_lsb);

  606. 

  607.             u(1, mslice_var(short_term_ref_pic_set_sps_flag));

  608.             if (!mslice->short_term_ref_pic_set_sps_flag) {

  609.                 vaapi_encode_h265_write_st_ref_pic_set(pbc, mseq->num_short_term_ref_pic_sets,

  610.                                                        &mslice->st_ref_pic_set);

  611.             } else if (mseq->num_short_term_ref_pic_sets > 1) {

  612.                 u(av_log2(mseq->num_short_term_ref_pic_sets - 1) + 1,

  613.                   mslice_var(short_term_ref_pic_idx));

  614.             }

  615. 

  616.             if (mseq->long_term_ref_pics_present_flag) {

  617.                 av_assert0(0);

  618.             }

  619. 

  620.             if (vseq->seq_fields.bits.sps_temporal_mvp_enabled_flag) {

  621.                 u(1, vslice_field(slice_temporal_mvp_enabled_flag));

  622.             }

  623. 

  624.             if (vseq->seq_fields.bits.sample_adaptive_offset_enabled_flag) {

  625.                 u(1, vslice_field(slice_sao_luma_flag));

  626.                 if (!vseq->seq_fields.bits.separate_colour_plane_flag &&

  627.                    vseq->seq_fields.bits.chroma_format_idc != 0) {

  628.                     u(1, vslice_field(slice_sao_chroma_flag));

  629.                 }

  630.             }

  631. 

  632.             if (vslice->slice_type == P_SLICE || vslice->slice_type == B_SLICE) {

  633.                 u(1, vslice_field(num_ref_idx_active_override_flag));

  634.                 if (vslice->slice_fields.bits.num_ref_idx_active_override_flag) {

  635.                     ue(vslice_var(num_ref_idx_l0_active_minus1));

  636.                     if (vslice->slice_type == B_SLICE) {

  637.                         ue(vslice_var(num_ref_idx_l1_active_minus1));

  638.                     }

  639.                 }

  640. 

  641.                 if (mseq->lists_modification_present_flag) {

  642.                     av_assert0(0);

  643.                     // ref_pic_lists_modification()

  644.                 }

  645.                 if (vslice->slice_type == B_SLICE) {

  646.                     u(1, vslice_field(mvd_l1_zero_flag));

  647.                 }

  648.                 if (mseq->cabac_init_present_flag) {

  649.                     u(1, vslice_field(cabac_init_flag));

  650.                 }

  651.                 if (vslice->slice_fields.bits.slice_temporal_mvp_enabled_flag) {

  652.                     if (vslice->slice_type == B_SLICE)

  653.                         u(1, vslice_field(collocated_from_l0_flag));

  654.                     ue(vpic->collocated_ref_pic_index, collocated_ref_idx);

  655.                 }

  656.                 if ((vpic->pic_fields.bits.weighted_pred_flag &&

  657.                      vslice->slice_type == P_SLICE) ||

  658.                     (vpic->pic_fields.bits.weighted_bipred_flag &&

  659.                      vslice->slice_type == B_SLICE)) {

  660.                     av_assert0(0);

  661.                     // pred_weight_table()

  662.                 }

  663.                 ue(5 - vslice->max_num_merge_cand, five_minus_max_num_merge_cand);

  664.             }

  665. 

  666.             se(vslice_var(slice_qp_delta));

  667.             if (mseq->pps_slice_chroma_qp_offsets_present_flag) {

  668.                 se(vslice_var(slice_cb_qp_offset));

  669.                 se(vslice_var(slice_cr_qp_offset));

  670.             }

  671.             if (mseq->pps_slice_chroma_offset_list_enabled_flag) {

  672.                 u(1, 0, cu_chroma_qp_offset_enabled_flag);

  673.             }

  674.             if (mseq->deblocking_filter_override_enabled_flag) {

  675.                 u(1, mslice_var(deblocking_filter_override_flag));

  676.             }

  677.             if (mslice->deblocking_filter_override_flag) {

  678.                 u(1, vslice_field(slice_deblocking_filter_disabled_flag));

  679.                 if (!vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag) {

  680.                     se(vslice_var(slice_beta_offset_div2));

  681.                     se(vslice_var(slice_tc_offset_div2));

  682.                 }

  683.             }

  684.             if (vpic->pic_fields.bits.pps_loop_filter_across_slices_enabled_flag &&

  685.                 (vslice->slice_fields.bits.slice_sao_luma_flag ||

  686.                  vslice->slice_fields.bits.slice_sao_chroma_flag ||

  687.                  vslice->slice_fields.bits.slice_deblocking_filter_disabled_flag)) {

  688.                 u(1, vslice_field(slice_loop_filter_across_slices_enabled_flag));

  689.             }

  690.         }

  691. 

  692.         if (vpic->pic_fields.bits.tiles_enabled_flag ||

  693.             vpic->pic_fields.bits.entropy_coding_sync_enabled_flag) {

  694.             // num_entry_point_offsets

  695.         }

  696. 

  697.         if (0) {

  698.             // slice_segment_header_extension_length

  699.         }

  700.     }

  701. 

  702.     u(1, 1, alignment_bit_equal_to_one);

  703.     while (put_bits_count(pbc) & 7)

  704.         u(1, 0, alignment_bit_equal_to_zero);

  705. }

  706. 

  707. static int vaapi_encode_h265_write_sequence_header(AVCodecContext *avctx,

  708.                                                    char *data, size_t *data_len)

  709. {

  710.     VAAPIEncodeContext *ctx = avctx->priv_data;

  711.     PutBitContext pbc;

  712.     char tmp[256];

  713.     int err;

  714.     size_t nal_len, bit_len, bit_pos, next_len;

  715. 

  716.     bit_len = *data_len;

  717.     bit_pos = 0;

  718. 

  719.     init_put_bits(&pbc, tmp, sizeof(tmp));

  720.     vaapi_encode_h265_write_vps(&pbc, ctx);

  721.     nal_len = put_bits_count(&pbc);

  722.     flush_put_bits(&pbc);

  723. 

  724.     next_len = bit_len - bit_pos;

  725.     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,

  726.                                                        &next_len,

  727.                                                        tmp, nal_len);

  728.     if (err < 0)

  729.         return err;

  730.     bit_pos += next_len;

  731. 

  732.     init_put_bits(&pbc, tmp, sizeof(tmp));

  733.     vaapi_encode_h265_write_sps(&pbc, ctx);

  734.     nal_len = put_bits_count(&pbc);

  735.     flush_put_bits(&pbc);

  736. 

  737.     next_len = bit_len - bit_pos;

  738.     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,

  739.                                                        &next_len,

  740.                                                        tmp, nal_len);

  741.     if (err < 0)

  742.         return err;

  743.     bit_pos += next_len;

  744. 

  745.     init_put_bits(&pbc, tmp, sizeof(tmp));

  746.     vaapi_encode_h265_write_pps(&pbc, ctx);

  747.     nal_len = put_bits_count(&pbc);

  748.     flush_put_bits(&pbc);

  749. 

  750.     next_len = bit_len - bit_pos;

  751.     err = ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data + bit_pos / 8,

  752.                                                        &next_len,

  753.                                                        tmp, nal_len);

  754.     if (err < 0)

  755.         return err;

  756.     bit_pos += next_len;

  757. 

  758.     *data_len = bit_pos;

  759.     return 0;

  760. }

  761. 

  762. static int vaapi_encode_h265_write_slice_header(AVCodecContext *avctx,

  763.                                                 VAAPIEncodePicture *pic,

  764.                                                 VAAPIEncodeSlice *slice,

  765.                                                 char *data, size_t *data_len)

  766. {

  767.     VAAPIEncodeContext *ctx = avctx->priv_data;

  768.     PutBitContext pbc;

  769.     char tmp[256];

  770.     size_t header_len;

  771. 

  772.     init_put_bits(&pbc, tmp, sizeof(tmp));

  773.     vaapi_encode_h265_write_slice_header2(&pbc, ctx, pic, slice);

  774.     header_len = put_bits_count(&pbc);

  775.     flush_put_bits(&pbc);

  776. 

  777.     return ff_vaapi_encode_h26x_nal_unit_to_byte_stream(data, data_len,

  778.                                                         tmp, header_len);

  779. }

  780. 

  781. static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)

  782. {

  783.     VAAPIEncodeContext                 *ctx = avctx->priv_data;

  784.     VAEncSequenceParameterBufferHEVC  *vseq = ctx->codec_sequence_params;

  785.     VAEncPictureParameterBufferHEVC   *vpic = ctx->codec_picture_params;

  786.     VAAPIEncodeH265Context            *priv = ctx->priv_data;

  787.     VAAPIEncodeH265MiscSequenceParams *mseq = &priv->misc_sequence_params;

  788.     int i;

  789. 

  790.     {

  791.         // general_profile_space == 0.

  792.         vseq->general_profile_idc = 1; // Main profile (ctx->codec_profile?)

  793.         vseq->general_tier_flag = 0;

  794. 

  795.         vseq->general_level_idc = avctx->level * 3;

  796. 

  797.         vseq->intra_period = 0;

  798.         vseq->intra_idr_period = 0;

  799.         vseq->ip_period = 0;

  800. 

  801.         vseq->pic_width_in_luma_samples  = ctx->aligned_width;

  802.         vseq->pic_height_in_luma_samples = ctx->aligned_height;

  803. 

  804.         vseq->seq_fields.bits.chroma_format_idc = 1; // 4:2:0.

  805.         vseq->seq_fields.bits.separate_colour_plane_flag = 0;

  806.         vseq->seq_fields.bits.bit_depth_luma_minus8 = 0; // 8-bit luma.

  807.         vseq->seq_fields.bits.bit_depth_chroma_minus8 = 0; // 8-bit chroma.

  808.         // Other misc flags all zero.

  809. 

  810.         // These have to come from the capabilities of the encoder.  We have

  811.         // no way to query it, so just hardcode ones which worked for me...

  812.         // CTB size from 8x8 to 32x32.

  813.         vseq->log2_min_luma_coding_block_size_minus3 = 0;

  814.         vseq->log2_diff_max_min_luma_coding_block_size = 2;

  815.         // Transform size from 4x4 to 32x32.

  816.         vseq->log2_min_transform_block_size_minus2 = 0;

  817.         vseq->log2_diff_max_min_transform_block_size = 3;

  818.         // Full transform hierarchy allowed (2-5).

  819.         vseq->max_transform_hierarchy_depth_inter = 3;

  820.         vseq->max_transform_hierarchy_depth_intra = 3;

  821. 

  822.         vseq->vui_parameters_present_flag = 0;

  823. 

  824.         vseq->bits_per_second = avctx->bit_rate;

  825.         if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {

  826.             vseq->vui_num_units_in_tick = avctx->framerate.num;

  827.             vseq->vui_time_scale        = avctx->framerate.den;

  828.         } else {

  829.             vseq->vui_num_units_in_tick = avctx->time_base.num;

  830.             vseq->vui_time_scale        = avctx->time_base.den;

  831.         }

  832. 

  833.         vseq->intra_period     = ctx->p_per_i * (ctx->b_per_p + 1);

  834.         vseq->intra_idr_period = vseq->intra_period;

  835.         vseq->ip_period        = ctx->b_per_p + 1;

  836.     }

  837. 

  838.     {

  839.         vpic->decoded_curr_pic.picture_id = VA_INVALID_ID;

  840.         vpic->decoded_curr_pic.flags      = VA_PICTURE_HEVC_INVALID;

  841. 

  842.         for (i = 0; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {

  843.             vpic->reference_frames[i].picture_id = VA_INVALID_ID;

  844.             vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;

  845.         }

  846. 

  847.         vpic->collocated_ref_pic_index = 0xff;

  848. 

  849.         vpic->last_picture = 0;

  850. 

  851.         vpic->pic_init_qp = priv->fixed_qp_idr;

  852. 

  853.         vpic->diff_cu_qp_delta_depth = 0;

  854.         vpic->pps_cb_qp_offset = 0;

  855.         vpic->pps_cr_qp_offset = 0;

  856. 

  857.         // tiles_enabled_flag == 0, so ignore num_tile_(rows|columns)_minus1.

  858. 

  859.         vpic->log2_parallel_merge_level_minus2 = 0;

  860. 

  861.         // No limit on size.

  862.         vpic->ctu_max_bitsize_allowed = 0;

  863. 

  864.         vpic->num_ref_idx_l0_default_active_minus1 = 0;

  865.         vpic->num_ref_idx_l1_default_active_minus1 = 0;

  866. 

  867.         vpic->slice_pic_parameter_set_id = 0;

  868. 

  869.         vpic->pic_fields.bits.screen_content_flag = 0;

  870.         vpic->pic_fields.bits.enable_gpu_weighted_prediction = 0;

  871. 

  872.         // Per-CU QP changes are required for non-constant-QP modes.

  873.         vpic->pic_fields.bits.cu_qp_delta_enabled_flag =

  874.             ctx->va_rc_mode != VA_RC_CQP;

  875.     }

  876. 

  877.     {

  878.         mseq->video_parameter_set_id = 5;

  879.         mseq->seq_parameter_set_id = 5;

  880. 

  881.         mseq->vps_max_layers_minus1 = 0;

  882.         mseq->vps_max_sub_layers_minus1 = 0;

  883.         mseq->vps_temporal_id_nesting_flag = 1;

  884.         mseq->sps_max_sub_layers_minus1 = 0;

  885.         mseq->sps_temporal_id_nesting_flag = 1;

  886. 

  887.         for (i = 0; i < 32; i++) {

  888.             mseq->general_profile_compatibility_flag[i] =

  889.                 (i == vseq->general_profile_idc);

  890.         }

  891. 

  892.         mseq->general_progressive_source_flag    = 1;

  893.         mseq->general_interlaced_source_flag     = 0;

  894.         mseq->general_non_packed_constraint_flag = 0;

  895.         mseq->general_frame_only_constraint_flag = 1;

  896.         mseq->general_inbld_flag = 0;

  897. 

  898.         mseq->log2_max_pic_order_cnt_lsb_minus4 = 8;

  899.         mseq->vps_sub_layer_ordering_info_present_flag = 0;

  900.         mseq->vps_max_dec_pic_buffering_minus1[0] = 1;

  901.         mseq->vps_max_num_reorder_pics[0]         = ctx->b_per_p;

  902.         mseq->vps_max_latency_increase_plus1[0]   = 0;

  903.         mseq->sps_sub_layer_ordering_info_present_flag = 0;

  904.         mseq->sps_max_dec_pic_buffering_minus1[0] = 1;

  905.         mseq->sps_max_num_reorder_pics[0]         = ctx->b_per_p;

  906.         mseq->sps_max_latency_increase_plus1[0]   = 0;

  907. 

  908.         mseq->vps_timing_info_present_flag = 1;

  909.         mseq->vps_num_units_in_tick = avctx->time_base.num;

  910.         mseq->vps_time_scale        = avctx->time_base.den;

  911.         mseq->vps_poc_proportional_to_timing_flag = 1;

  912.         mseq->vps_num_ticks_poc_diff_minus1 = 0;

  913. 

  914.         if (ctx->input_width  != ctx->aligned_width ||

  915.             ctx->input_height != ctx->aligned_height) {

  916.             mseq->conformance_window_flag = 1;

  917.             mseq->conf_win_left_offset   = 0;

  918.             mseq->conf_win_right_offset  =

  919.                 (ctx->aligned_width - ctx->input_width) / 2;

  920.             mseq->conf_win_top_offset    = 0;

  921.             mseq->conf_win_bottom_offset =

  922.                 (ctx->aligned_height - ctx->input_height) / 2;

  923.         } else {

  924.             mseq->conformance_window_flag = 0;

  925.         }

  926. 

  927.         mseq->num_short_term_ref_pic_sets = 0;

  928.         // STRPSs should ideally be here rather than repeated in each slice.

  929. 

  930.         mseq->vui_parameters_present_flag = 1;

  931.         if (avctx->sample_aspect_ratio.num != 0) {

  932.             mseq->aspect_ratio_info_present_flag = 1;

  933.             if (avctx->sample_aspect_ratio.num ==

  934.                 avctx->sample_aspect_ratio.den) {

  935.                 mseq->aspect_ratio_idc = 1;

  936.             } else {

  937.                 mseq->aspect_ratio_idc = 255; // Extended SAR.

  938.                 mseq->sar_width  = avctx->sample_aspect_ratio.num;

  939.                 mseq->sar_height = avctx->sample_aspect_ratio.den;

  940.             }

  941.         }

  942.         if (1) {

  943.             // Should this be conditional on some of these being set?

  944.             mseq->video_signal_type_present_flag = 1;

  945.             mseq->video_format = 5; // Unspecified.

  946.             mseq->video_full_range_flag = 0;

  947.             mseq->colour_description_present_flag = 1;

  948.             mseq->colour_primaries = avctx->color_primaries;

  949.             mseq->transfer_characteristics = avctx->color_trc;

  950.             mseq->matrix_coeffs = avctx->colorspace;

  951.         }

  952.     }

  953. 

  954.     return 0;

  955. }

  956. 

  957. static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,

  958.                                                  VAAPIEncodePicture *pic)

  959. {

  960.     VAAPIEncodeContext               *ctx = avctx->priv_data;

  961.     VAEncPictureParameterBufferHEVC *vpic = pic->codec_picture_params;

  962.     VAAPIEncodeH265Context          *priv = ctx->priv_data;

  963.     int i;

  964. 

  965.     if (pic->type == PICTURE_TYPE_IDR) {

  966.         av_assert0(pic->display_order == pic->encode_order);

  967.         priv->last_idr_frame = pic->display_order;

  968.     } else {

  969.         av_assert0(pic->encode_order > priv->last_idr_frame);

  970.         // Display order need not be if we have RA[SD]L pictures, though.

  971.     }

  972. 

  973.     vpic->decoded_curr_pic.picture_id    = pic->recon_surface;

  974.     vpic->decoded_curr_pic.pic_order_cnt =

  975.         pic->display_order - priv->last_idr_frame;

  976.     vpic->decoded_curr_pic.flags         = 0;

  977. 

  978.     for (i = 0; i < pic->nb_refs; i++) {

  979.         VAAPIEncodePicture *ref = pic->refs[i];

  980.         av_assert0(ref);

  981.         vpic->reference_frames[i].picture_id    = ref->recon_surface;

  982.         vpic->reference_frames[i].pic_order_cnt =

  983.             ref->display_order - priv->last_idr_frame;

  984.         vpic->reference_frames[i].flags =

  985.             (ref->display_order < pic->display_order ?

  986.              VA_PICTURE_HEVC_RPS_ST_CURR_BEFORE : 0) |

  987.             (ref->display_order > pic->display_order ?

  988.              VA_PICTURE_HEVC_RPS_ST_CURR_AFTER  : 0);

  989.     }

  990.     for (; i < FF_ARRAY_ELEMS(vpic->reference_frames); i++) {

  991.         vpic->reference_frames[i].picture_id = VA_INVALID_ID;

  992.         vpic->reference_frames[i].flags      = VA_PICTURE_HEVC_INVALID;

  993.     }

  994. 

  995.     vpic->coded_buf = pic->output_buffer;

  996. 

  997.     switch (pic->type) {

  998.     case PICTURE_TYPE_IDR:

  999.         vpic->nal_unit_type = NAL_IDR_W_RADL;

  1000.         vpic->pic_fields.bits.idr_pic_flag = 1;

  1001.         vpic->pic_fields.bits.coding_type  = 1;

  1002.         vpic->pic_fields.bits.reference_pic_flag = 1;

  1003.         break;

  1004.     case PICTURE_TYPE_I:

  1005.         vpic->nal_unit_type = NAL_TRAIL_R;

  1006.         vpic->pic_fields.bits.idr_pic_flag = 0;

  1007.         vpic->pic_fields.bits.coding_type  = 1;

  1008.         vpic->pic_fields.bits.reference_pic_flag = 1;

  1009.         break;

  1010.     case PICTURE_TYPE_P:

  1011.         vpic->nal_unit_type = NAL_TRAIL_R;

  1012.         vpic->pic_fields.bits.idr_pic_flag = 0;

  1013.         vpic->pic_fields.bits.coding_type  = 2;

  1014.         vpic->pic_fields.bits.reference_pic_flag = 1;

  1015.         break;

  1016.     case PICTURE_TYPE_B:

  1017.         vpic->nal_unit_type = NAL_TRAIL_R;

  1018.         vpic->pic_fields.bits.idr_pic_flag = 0;

  1019.         vpic->pic_fields.bits.coding_type  = 3;

  1020.         vpic->pic_fields.bits.reference_pic_flag = 0;

  1021.         break;

  1022.     default:

  1023.         av_assert0(0 && "invalid picture type");

  1024.     }

  1025. 

  1026.     pic->nb_slices = 1;

  1027. 

  1028.     return 0;

  1029. }

  1030. 

  1031. static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,

  1032.                                                VAAPIEncodePicture *pic,

  1033.                                                VAAPIEncodeSlice *slice)

  1034. {

  1035.     VAAPIEncodeContext                *ctx = avctx->priv_data;

  1036.     VAEncPictureParameterBufferHEVC  *vpic = pic->codec_picture_params;

  1037.     VAEncSliceParameterBufferHEVC  *vslice = slice->codec_slice_params;

  1038.     VAAPIEncodeH265Context           *priv = ctx->priv_data;

  1039.     VAAPIEncodeH265Slice           *pslice;

  1040.     VAAPIEncodeH265MiscSliceParams *mslice;

  1041.     int i;

  1042. 

  1043.     slice->priv_data = av_mallocz(sizeof(*pslice));

  1044.     if (!slice->priv_data)

  1045.         return AVERROR(ENOMEM);

  1046.     pslice = slice->priv_data;

  1047.     mslice = &pslice->misc_slice_params;

  1048. 

  1049.     // Currently we only support one slice per frame.

  1050.     vslice->slice_segment_address = 0;

  1051.     vslice->num_ctu_in_slice = priv->ctu_width * priv->ctu_height;

  1052. 

  1053.     switch (pic->type) {

  1054.     case PICTURE_TYPE_IDR:

  1055.     case PICTURE_TYPE_I:

  1056.         vslice->slice_type = I_SLICE;

  1057.         break;

  1058.     case PICTURE_TYPE_P:

  1059.         vslice->slice_type = P_SLICE;

  1060.         break;

  1061.     case PICTURE_TYPE_B:

  1062.         vslice->slice_type = B_SLICE;

  1063.         break;

  1064.     default:

  1065.         av_assert0(0 && "invalid picture type");

  1066.     }

  1067. 

  1068.     vslice->slice_pic_parameter_set_id = vpic->slice_pic_parameter_set_id;

  1069. 

  1070.     pslice->pic_order_cnt = pic->display_order - priv->last_idr_frame;

  1071. 

  1072.     for (i = 0; i < FF_ARRAY_ELEMS(vslice->ref_pic_list0); i++) {

  1073.         vslice->ref_pic_list0[i].picture_id = VA_INVALID_ID;

  1074.         vslice->ref_pic_list0[i].flags      = VA_PICTURE_HEVC_INVALID;

  1075.         vslice->ref_pic_list1[i].picture_id = VA_INVALID_ID;

  1076.         vslice->ref_pic_list1[i].flags      = VA_PICTURE_HEVC_INVALID;

  1077.     }

  1078. 

  1079.     av_assert0(pic->nb_refs <= 2);

  1080.     if (pic->nb_refs >= 1) {

  1081.         // Backward reference for P- or B-frame.

  1082.         av_assert0(pic->type == PICTURE_TYPE_P ||

  1083.                    pic->type == PICTURE_TYPE_B);

  1084. 

  1085.         vslice->num_ref_idx_l0_active_minus1 = 0;

  1086.         vslice->ref_pic_list0[0] = vpic->reference_frames[0];

  1087.     }

  1088.     if (pic->nb_refs >= 2) {

  1089.         // Forward reference for B-frame.

  1090.         av_assert0(pic->type == PICTURE_TYPE_B);

  1091. 

  1092.         vslice->num_ref_idx_l1_active_minus1 = 0;

  1093.         vslice->ref_pic_list1[0] = vpic->reference_frames[1];

  1094.     }

  1095. 

  1096.     vslice->max_num_merge_cand = 5;

  1097. 

  1098.     if (pic->type == PICTURE_TYPE_B)

  1099.         vslice->slice_qp_delta = priv->fixed_qp_b  - vpic->pic_init_qp;

  1100.     else if (pic->type == PICTURE_TYPE_P)

  1101.         vslice->slice_qp_delta = priv->fixed_qp_p - vpic->pic_init_qp;

  1102.     else

  1103.         vslice->slice_qp_delta = priv->fixed_qp_idr - vpic->pic_init_qp;

  1104. 

  1105.     vslice->slice_fields.bits.last_slice_of_pic_flag = 1;

  1106. 

  1107.     mslice->first_slice_segment_in_pic_flag = 1;

  1108. 

  1109.     if (pic->type == PICTURE_TYPE_IDR) {

  1110.         // No reference pictures.

  1111.     } else if (0) {

  1112.         mslice->short_term_ref_pic_set_sps_flag = 1;

  1113.         mslice->short_term_ref_pic_idx = 0;

  1114.     } else {

  1115.         VAAPIEncodePicture *st;

  1116.         int used;

  1117. 

  1118.         mslice->short_term_ref_pic_set_sps_flag = 0;

  1119.         mslice->st_ref_pic_set.inter_ref_pic_set_prediction_flag = 0;

  1120. 

  1121.         for (st = ctx->pic_start; st; st = st->next) {

  1122.             if (st->encode_order >= pic->encode_order) {

  1123.                 // Not yet in DPB.

  1124.                 continue;

  1125.             }

  1126.             used = 0;

  1127.             for (i = 0; i < pic->nb_refs; i++) {

  1128.                 if (pic->refs[i] == st)

  1129.                     used = 1;

  1130.             }

  1131.             if (!used) {

  1132.                 // Currently true, but need not be.

  1133.                 continue;

  1134.             }

  1135.             // This only works for one instance of each (delta_poc_sN_minus1

  1136.             // is relative to the previous frame in the list, not relative to

  1137.             // the current frame directly).

  1138.             if (st->display_order < pic->display_order) {

  1139.                 i = mslice->st_ref_pic_set.num_negative_pics;

  1140.                 mslice->st_ref_pic_set.delta_poc_s0_minus1[i] =

  1141.                     pic->display_order - st->display_order - 1;

  1142.                 mslice->st_ref_pic_set.used_by_curr_pic_s0_flag[i] = used;

  1143.                 ++mslice->st_ref_pic_set.num_negative_pics;

  1144.             } else {

  1145.                 i = mslice->st_ref_pic_set.num_positive_pics;

  1146.                 mslice->st_ref_pic_set.delta_poc_s1_minus1[i] =

  1147.                     st->display_order - pic->display_order - 1;

  1148.                 mslice->st_ref_pic_set.used_by_curr_pic_s1_flag[i] = used;

  1149.                 ++mslice->st_ref_pic_set.num_positive_pics;

  1150.             }

  1151.         }

  1152.     }

  1153. 

  1154.     return 0;

  1155. }

  1156. 

  1157. static av_cold int vaapi_encode_h265_init_constant_bitrate(AVCodecContext *avctx)

  1158. {

  1159.     VAAPIEncodeContext      *ctx = avctx->priv_data;

  1160.     VAAPIEncodeH265Context *priv = ctx->priv_data;

  1161.     int hrd_buffer_size;

  1162.     int hrd_initial_buffer_fullness;

  1163. 

  1164.     if (avctx->rc_buffer_size)

  1165.         hrd_buffer_size = avctx->rc_buffer_size;

  1166.     else

  1167.         hrd_buffer_size = avctx->bit_rate;

  1168.     if (avctx->rc_initial_buffer_occupancy)

  1169.         hrd_initial_buffer_fullness = avctx->rc_initial_buffer_occupancy;

  1170.     else

  1171.         hrd_initial_buffer_fullness = hrd_buffer_size * 3 / 4;

  1172. 

  1173.     priv->rc_params.misc.type = VAEncMiscParameterTypeRateControl;

  1174.     priv->rc_params.rc = (VAEncMiscParameterRateControl) {

  1175.         .bits_per_second   = avctx->bit_rate,

  1176.         .target_percentage = 66,

  1177.         .window_size       = 1000,

  1178.         .initial_qp        = (avctx->qmax >= 0 ? avctx->qmax : 40),

  1179.         .min_qp            = (avctx->qmin >= 0 ? avctx->qmin : 20),

  1180.         .basic_unit_size   = 0,

  1181.     };

  1182.     ctx->global_params[ctx->nb_global_params] =

  1183.         &priv->rc_params.misc;

  1184.     ctx->global_params_size[ctx->nb_global_params++] =

  1185.         sizeof(priv->rc_params);

  1186. 

  1187.     priv->hrd_params.misc.type = VAEncMiscParameterTypeHRD;

  1188.     priv->hrd_params.hrd = (VAEncMiscParameterHRD) {

  1189.         .initial_buffer_fullness = hrd_initial_buffer_fullness,

  1190.         .buffer_size             = hrd_buffer_size,

  1191.     };

  1192.     ctx->global_params[ctx->nb_global_params] =

  1193.         &priv->hrd_params.misc;

  1194.     ctx->global_params_size[ctx->nb_global_params++] =

  1195.         sizeof(priv->hrd_params);

  1196. 

  1197.     // These still need to be  set for pic_init_qp/slice_qp_delta.

  1198.     priv->fixed_qp_idr = 30;

  1199.     priv->fixed_qp_p   = 30;

  1200.     priv->fixed_qp_b   = 30;

  1201. 

  1202.     av_log(avctx, AV_LOG_DEBUG, "Using constant-bitrate = %d bps.\n",

  1203.            avctx->bit_rate);

  1204.     return 0;

  1205. }

  1206. 

  1207. static av_cold int vaapi_encode_h265_init_fixed_qp(AVCodecContext *avctx)

  1208. {

  1209.     VAAPIEncodeContext      *ctx = avctx->priv_data;

  1210.     VAAPIEncodeH265Context *priv = ctx->priv_data;

  1211.     VAAPIEncodeH265Options  *opt = ctx->codec_options;

  1212. 

  1213.     priv->fixed_qp_p = opt->qp;

  1214.     if (avctx->i_quant_factor > 0.0)

  1215.         priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +

  1216.                                     avctx->i_quant_offset) + 0.5);

  1217.     else

  1218.         priv->fixed_qp_idr = priv->fixed_qp_p;

  1219.     if (avctx->b_quant_factor > 0.0)

  1220.         priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +

  1221.                                   avctx->b_quant_offset) + 0.5);

  1222.     else

  1223.         priv->fixed_qp_b = priv->fixed_qp_p;

  1224. 

  1225.     av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "

  1226.            "%d / %d / %d for IDR- / P- / B-frames.\n",

  1227.            priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);

  1228.     return 0;

  1229. }

  1230. 

  1231. static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)

  1232. {

  1233.     static const VAConfigAttrib default_config_attributes[] = {

  1234.         { .type  = VAConfigAttribRTFormat,

  1235.           .value = VA_RT_FORMAT_YUV420 },

  1236.         { .type  = VAConfigAttribEncPackedHeaders,

  1237.           .value = (VA_ENC_PACKED_HEADER_SEQUENCE |

  1238.                     VA_ENC_PACKED_HEADER_SLICE) },

  1239.     };

  1240. 

  1241.     VAAPIEncodeContext      *ctx = avctx->priv_data;

  1242.     VAAPIEncodeH265Context *priv = ctx->priv_data;

  1243.     int i, err;

  1244. 

  1245.     switch (avctx->profile) {

  1246.     case FF_PROFILE_HEVC_MAIN:

  1247.     case FF_PROFILE_UNKNOWN:

  1248.         ctx->va_profile = VAProfileHEVCMain;

  1249.         break;

  1250.     case FF_PROFILE_HEVC_MAIN_10:

  1251.         av_log(avctx, AV_LOG_ERROR, "H.265 main 10-bit profile "

  1252.                "is not supported.\n");

  1253.         return AVERROR_PATCHWELCOME;

  1254.     default:

  1255.         av_log(avctx, AV_LOG_ERROR, "Unknown H.265 profile %d.\n",

  1256.                avctx->profile);

  1257.         return AVERROR(EINVAL);

  1258.     }

  1259.     ctx->va_entrypoint = VAEntrypointEncSlice;

  1260. 

  1261.     ctx->input_width    = avctx->width;

  1262.     ctx->input_height   = avctx->height;

  1263.     ctx->aligned_width  = FFALIGN(ctx->input_width,  16);

  1264.     ctx->aligned_height = FFALIGN(ctx->input_height, 16);

  1265.     priv->ctu_width     = FFALIGN(ctx->aligned_width,  32) / 32;

  1266.     priv->ctu_height    = FFALIGN(ctx->aligned_height, 32) / 32;

  1267. 

  1268.     av_log(avctx, AV_LOG_VERBOSE, "Input %ux%u -> Aligned %ux%u -> CTU %ux%u.\n",

  1269.            ctx->input_width, ctx->input_height, ctx->aligned_width,

  1270.            ctx->aligned_height, priv->ctu_width, priv->ctu_height);

  1271. 

  1272.     for (i = 0; i < FF_ARRAY_ELEMS(default_config_attributes); i++) {

  1273.         ctx->config_attributes[ctx->nb_config_attributes++] =

  1274.             default_config_attributes[i];

  1275.     }

  1276. 

  1277.     if (avctx->bit_rate > 0) {

  1278.         ctx->va_rc_mode = VA_RC_CBR;

  1279.         err = vaapi_encode_h265_init_constant_bitrate(avctx);

  1280.     } else {

  1281.         ctx->va_rc_mode = VA_RC_CQP;

  1282.         err = vaapi_encode_h265_init_fixed_qp(avctx);

  1283.     }

  1284.     if (err < 0)

  1285.         return err;

  1286. 

  1287.     ctx->config_attributes[ctx->nb_config_attributes++] = (VAConfigAttrib) {

  1288.         .type  = VAConfigAttribRateControl,

  1289.         .value = ctx->va_rc_mode,

  1290.     };

  1291. 

  1292.     ctx->nb_recon_frames = 20;

  1293. 

  1294.     return 0;

  1295. }

  1296. 

  1297. static VAAPIEncodeType vaapi_encode_type_h265 = {

  1298.     .priv_data_size        = sizeof(VAAPIEncodeH265Context),

  1299. 

  1300.     .init                  = &vaapi_encode_h265_init_internal,

  1301. 

  1302.     .sequence_params_size  = sizeof(VAEncSequenceParameterBufferHEVC),

  1303.     .init_sequence_params  = &vaapi_encode_h265_init_sequence_params,

  1304. 

  1305.     .picture_params_size   = sizeof(VAEncPictureParameterBufferHEVC),

  1306.     .init_picture_params   = &vaapi_encode_h265_init_picture_params,

  1307. 

  1308.     .slice_params_size     = sizeof(VAEncSliceParameterBufferHEVC),

  1309.     .init_slice_params     = &vaapi_encode_h265_init_slice_params,

  1310. 

  1311.     .sequence_header_type  = VAEncPackedHeaderSequence,

  1312.     .write_sequence_header = &vaapi_encode_h265_write_sequence_header,

  1313. 

  1314.     .slice_header_type     = VAEncPackedHeaderHEVC_Slice,

  1315.     .write_slice_header    = &vaapi_encode_h265_write_slice_header,

  1316. };

  1317. 

  1318. static av_cold int vaapi_encode_h265_init(AVCodecContext *avctx)

  1319. {

  1320.     return ff_vaapi_encode_init(avctx, &vaapi_encode_type_h265);

  1321. }

  1322. 

  1323. #define OFFSET(x) (offsetof(VAAPIEncodeContext, codec_options_data) + \

  1324.                    offsetof(VAAPIEncodeH265Options, x))

  1325. #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)

  1326. static const AVOption vaapi_encode_h265_options[] = {

  1327.     { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",

  1328.       OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, 52, FLAGS },

  1329.     { NULL },

  1330. };

  1331. 

  1332. static const AVCodecDefault vaapi_encode_h265_defaults[] = {

  1333.     { "profile",        "1"   },

  1334.     { "level",          "51"  },

  1335.     { "b",              "0"   },

  1336.     { "bf",             "2"   },

  1337.     { "g",              "120" },

  1338.     { "i_qfactor",      "1.0" },

  1339.     { "i_qoffset",      "0.0" },

  1340.     { "b_qfactor",      "1.2" },

  1341.     { "b_qoffset",      "0.0" },

  1342.     { NULL },

  1343. };

  1344. 

  1345. static const AVClass vaapi_encode_h265_class = {

  1346.     .class_name = "h265_vaapi",

  1347.     .item_name  = av_default_item_name,

  1348.     .option     = vaapi_encode_h265_options,

  1349.     .version    = LIBAVUTIL_VERSION_INT,

  1350. };

  1351. 

  1352. AVCodec ff_hevc_vaapi_encoder = {

  1353.     .name           = "hevc_vaapi",

  1354.     .long_name      = NULL_IF_CONFIG_SMALL("H.265/HEVC (VAAPI)"),

  1355.     .type           = AVMEDIA_TYPE_VIDEO,

  1356.     .id             = AV_CODEC_ID_HEVC,

  1357.     .priv_data_size = (sizeof(VAAPIEncodeContext) +

  1358.                        sizeof(VAAPIEncodeH265Options)),

  1359.     .init           = &vaapi_encode_h265_init,

  1360.     .encode2        = &ff_vaapi_encode2,

  1361.     .close          = &ff_vaapi_encode_close,

  1362.     .priv_class     = &vaapi_encode_h265_class,

  1363.     .capabilities   = AV_CODEC_CAP_DELAY,

  1364.     .defaults       = vaapi_encode_h265_defaults,

  1365.     .pix_fmts = (const enum AVPixelFormat[]) {

  1366.         AV_PIX_FMT_VAAPI,

  1367.         AV_PIX_FMT_NONE,

  1368.     },

  1369. };