/******************************************************************************

 *

 * Copyright (C) 2018 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at:

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 *

 *****************************************************************************

 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore

*/

/*!

 ******************************************************************************

 * \file ihevce_entropy_cod.c

 *

 * \brief

 *    This file contains interface function definitions related to Entroy coding

 *

 * \date

 *    18/09/2012

 *

 * \author

 *    Ittiam

 *

 * List of Functions

 *

 *

 ******************************************************************************

 */

/*****************************************************************************/

/* File Includes                                                             */

/*****************************************************************************/

/* System include files */

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <assert.h>

#include <stdarg.h>

#include <math.h>

/* User include files */

#include "ihevc_typedefs.h"

#include "itt_video_api.h"

#include "ihevce_api.h"

#include "rc_cntrl_param.h"

#include "rc_frame_info_collector.h"

#include "rc_look_ahead_params.h"

#include "ihevc_defs.h"

#include "ihevc_macros.h"

#include "ihevc_debug.h"

#include "ihevc_structs.h"

#include "ihevc_platform_macros.h"

#include "ihevc_deblk.h"

#include "ihevc_itrans_recon.h"

#include "ihevc_chroma_itrans_recon.h"

#include "ihevc_chroma_intra_pred.h"

#include "ihevc_intra_pred.h"

#include "ihevc_inter_pred.h"

#include "ihevc_mem_fns.h"

#include "ihevc_padding.h"

#include "ihevc_weighted_pred.h"

#include "ihevc_sao.h"

#include "ihevc_resi_trans.h"

#include "ihevc_quant_iquant_ssd.h"

#include "ihevc_cabac_tables.h"

#include "ihevc_trans_tables.h"

#include "ihevc_trans_macros.h"

#include "ihevce_defs.h"

#include "ihevce_hle_interface.h"

#include "ihevce_hle_q_func.h"

#include "ihevce_lap_enc_structs.h"

#include "ihevce_multi_thrd_structs.h"

#include "ihevce_multi_thrd_funcs.h"

#include "ihevce_me_common_defs.h"

#include "ihevce_had_satd.h"

#include "ihevce_error_codes.h"

#include "ihevce_error_checks.h"

#include "ihevce_bitstream.h"

#include "ihevce_cabac.h"

#include "ihevce_rdoq_macros.h"

#include "ihevce_function_selector.h"

#include "ihevce_enc_structs.h"

#include "ihevce_global_tables.h"

#include "ihevce_entropy_structs.h"

#include "ihevce_entropy_interface.h"

#include "ihevce_rc_enc_structs.h"

#include "ihevce_rc_interface.h"

#include "ihevce_encode_header.h"

#include "ihevce_encode_header_sei_vui.h"

#include "ihevce_trace.h"

#include "cast_types.h"

#include "osal.h"

#include "osal_defaults.h"

/*****************************************************************************/

/* Extern variables                                                          */

/*****************************************************************************/

UWORD8 gau1_pic_type_string[5][11] = {

    { "I-SLICE  " }, { "P-SLICE  " }, { "B-SLICE  " }, { "IDR-SLICE" }, { "b-SLICE  " }

};

/*****************************************************************************/

/* Function Macros                                                           */

/*****************************************************************************/

#define PSNR_FROM_MSE(x, bit_depth)                                                                \

    ((x == 0) ? 99.999999 : (20 * log10(((1 << bit_depth) - 1) / sqrt(x))))

/*****************************************************************************/

/* Function Definitions                                                      */

/*****************************************************************************/

/*!

 ******************************************************************************

 * \if Function name : ihevce_ent_coding_thrd \endif

 *

 * \brief

 *   Entropy coding thread interface function

 *

 * \param[in] Frame process pointer

 *

 * \return

 *    None

 *

 * \author

 *  Ittiam

 *

 *****************************************************************************

 */

WORD32 ihevce_ent_coding_thrd(void *pv_frm_proc_thrd_ctxt)

{

    /* local variabels */

    frm_proc_thrd_ctxt_t *ps_thrd_ctxt;

    enc_ctxt_t *ps_enc_ctxt;

    WORD32 i4_thrd_id;

    ihevce_hle_ctxt_t *ps_hle_ctxt;

    WORD32 end_flag;

    WORD32 out_buf_id;

    WORD32 inp_buf_id;

    WORD32 entropy_error = 0;

    WORD32 i4_bitrate_instance_num, i4_resolution_id, i4_out_res_id;

    WORD32 i4_bufque_id;

    UWORD32 u4_encode_frm_num = 0;

    UWORD32 u4_au_cpb_removal_delay_minus1 = 0;

    WORD32 i4_no_output = 0;

    WORD32 i4_do_entr_last = 1;

    WORD32 i4_use_dummy_buffer = 0;

    void *pv_entropy_hdl;

    entropy_context_t *ps_entropy_ctxt;

    iv_output_data_buffs_t *ps_curr_out = NULL;

    frm_proc_ent_cod_ctxt_t *ps_curr_inp = NULL;

    iv_output_data_buffs_t s_curr_out_dummy;

    /* derive local variables */

    ps_thrd_ctxt = (frm_proc_thrd_ctxt_t *)pv_frm_proc_thrd_ctxt;

    i4_thrd_id = ps_thrd_ctxt->i4_thrd_id;

    ps_hle_ctxt = (ihevce_hle_ctxt_t *)ps_thrd_ctxt->ps_hle_ctxt;

    ps_enc_ctxt = (enc_ctxt_t *)ps_thrd_ctxt->pv_enc_ctxt;

    end_flag = 0;

    i4_bitrate_instance_num = i4_thrd_id;

    i4_bufque_id = i4_thrd_id;

    i4_resolution_id = ps_enc_ctxt->i4_resolution_id;

    i4_out_res_id = i4_resolution_id;

    /*swaping of buf_id for 0th and reference bitrate location, as encoder

    assumes always 0th loc for reference bitrate and app must receive in

    the configured order*/

    i4_bufque_id = i4_bitrate_instance_num;

    if(i4_bitrate_instance_num == 0)

    {

        i4_bufque_id = ps_enc_ctxt->i4_ref_mbr_id;

    }

    else if(i4_bitrate_instance_num == ps_enc_ctxt->i4_ref_mbr_id)

    {

        i4_bufque_id = 0;

    }

    if(1 == ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.i4_mres_single_out)

    {

        i4_bufque_id = 0;

        i4_out_res_id = 0;

    }

    pv_entropy_hdl = ps_enc_ctxt->s_module_ctxt.apv_ent_cod_ctxt[i4_bitrate_instance_num];

    ps_entropy_ctxt = (entropy_context_t *)pv_entropy_hdl;

    /* ---------- Processing Loop until end command is recieved --------- */

    while(0 == end_flag)

    {

        /*Get a buffer pointer*/

        /* ------- get next input buffer from Frame buffer que ---------- */

        ps_curr_inp = (frm_proc_ent_cod_ctxt_t *)ihevce_q_get_filled_buff(

            (void *)ps_enc_ctxt,

            (IHEVCE_FRM_PRS_ENT_COD_Q + i4_bitrate_instance_num),

            &inp_buf_id,

            BUFF_QUE_BLOCKING_MODE);

        if(1 == ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.i4_mres_single_out)

        {

            if(1 == ps_curr_inp->i4_out_flush_flag)

            {

                if(1 == ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id])

                    ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id] = 0;

                else

                    ASSERT(0);

            }

            else

            {

                if(0 == ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id])

                {

                    /* During change in resolution check whether prev res is active before starting to dump new resolution */

                    WORD32 other_res_active = 1;

                    WORD32 ctr;

                    volatile WORD32 *pi4_active_res_check;

                    pi4_active_res_check = ps_enc_ctxt->s_multi_thrd.pi4_active_res_id;

                    while(other_res_active)

                    {

                        /* Continue in polling mode untill all the other resolutions are in passive mode */

                        other_res_active = 0;

                        for(ctr = 0;

                            ctr < ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.i4_num_res_layers;

                            ctr++)

                        {

                            if(ctr != i4_resolution_id)

                            {

                                /* Check whether any resolution other than current resolution is active */

                                /* If its active it means that previous resolution has not finished entropy */

                                /* Wait for it to finish entropy*/

                                other_res_active |= pi4_active_res_check[ctr];

                            }

                        }

                        if(1 == ps_curr_inp->i4_end_flag)

                        {

                            i4_no_output = 1;

                        }

                    }

                    if(0 == ps_curr_inp->i4_end_flag)

                    {

                        ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id] = 1;

                    }

                }

            }

        }

        if(0 == ps_curr_inp->i4_out_flush_flag)

        {

            if(1 == i4_no_output)

            {

                ps_curr_out = NULL;

            }

            else

            {

                if(!i4_use_dummy_buffer)

                {

                    /* ------- get a filled descriptor from output Que ------------ */

                    ps_curr_out = (iv_output_data_buffs_t *)ihevce_q_get_filled_buff(

                        (void *)ps_enc_ctxt,

                        (IHEVCE_OUTPUT_DATA_Q + i4_bufque_id),

                        &out_buf_id,

                        BUFF_QUE_BLOCKING_MODE);

                }

                else

                {

                    ps_curr_out = &s_curr_out_dummy;

                    out_buf_id = 0;

                    ps_curr_out->i4_bitstream_buf_size = ps_entropy_ctxt->i4_bitstream_buf_size;

                    ps_curr_out->pv_bitstream_bufs = ps_entropy_ctxt->pv_dummy_out_buf;

                }

            }

        }

        PROFILE_START(

            &ps_hle_ctxt->profile_entropy[ps_enc_ctxt->i4_resolution_id][i4_bitrate_instance_num]);

        /* Content Light Level Information */

        {

            ps_curr_inp->s_sei.i1_sei_cll_enable =

                (WORD8)ps_enc_ctxt->ps_stat_prms->s_out_strm_prms.i4_sei_cll_enable;

            ps_curr_inp->s_sei.s_cll_info_sei_params.u2_sei_max_cll =

                ps_enc_ctxt->ps_stat_prms->s_out_strm_prms.u2_sei_max_cll;

            ps_curr_inp->s_sei.s_cll_info_sei_params.u2_sei_avg_cll =

                ps_enc_ctxt->ps_stat_prms->s_out_strm_prms.u2_sei_avg_cll;

        }

        if((NULL != ps_curr_out) && (NULL != ps_curr_inp))

        {

            WORD32 i;

            /*PIC_INFO: reset the pic-level info flags*/

            ps_curr_inp->s_pic_level_info.i8_total_cu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_intra_cu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_inter_cu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_skip_cu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_pu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_intra_pu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_non_skipped_inter_pu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_merge_pu = 0;

            for(i = 0; i < 4; i++)

            {

                ps_curr_inp->s_pic_level_info.i8_total_cu_based_on_size[i] = 0;

                ps_curr_inp->s_pic_level_info.i8_total_2nx2n_intra_pu[i] = 0;

                ps_curr_inp->s_pic_level_info.i8_total_2nx2n_inter_pu[i] = 0;

                ps_curr_inp->s_pic_level_info.i8_total_tu_based_on_size[i] = 0;

                ps_curr_inp->s_pic_level_info.i8_total_smp_inter_pu[i] = 0;

                if(i != 3)

                {

                    ps_curr_inp->s_pic_level_info.i8_total_amp_inter_pu[i] = 0;

                    ps_curr_inp->s_pic_level_info.i8_total_nxn_inter_pu[i] = 0;

                }

            }

            ps_curr_inp->s_pic_level_info.i8_total_nxn_intra_pu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_L0_mode = 0;

            ps_curr_inp->s_pic_level_info.i8_total_L1_mode = 0;

            ps_curr_inp->s_pic_level_info.i8_total_BI_mode = 0;

            //ps_curr_inp->s_pic_level_info.u4_frame_intra_sad = ps_enc_ctxt->u4

            for(i = 0; i < MAX_DPB_SIZE; i++)

            {

                ps_curr_inp->s_pic_level_info.i8_total_L0_ref_idx[i] = 0;

                ps_curr_inp->s_pic_level_info.i8_total_L1_ref_idx[i] = 0;

            }

            ps_curr_inp->s_pic_level_info.i8_total_tu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_non_coded_tu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_intra_coded_tu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_inter_coded_tu = 0;

            ps_curr_inp->s_pic_level_info.i8_total_qp = 0;

            ps_curr_inp->s_pic_level_info.i8_total_qp_min_cu = 0;

            ps_curr_inp->s_pic_level_info.i4_min_qp = 100;

            ps_curr_inp->s_pic_level_info.i4_max_qp = 0;

            ps_curr_inp->s_pic_level_info.i4_max_frame_qp = 0;

            ps_curr_inp->s_pic_level_info.i8_sum_squared_frame_qp = 0;

            ps_curr_inp->s_pic_level_info.i8_total_frame_qp = 0;

            ps_curr_inp->s_pic_level_info.f_total_buffer_underflow = 0;

            ps_curr_inp->s_pic_level_info.f_total_buffer_overflow = 0;

            ps_curr_inp->s_pic_level_info.f_max_buffer_underflow = 0;

            ps_curr_inp->s_pic_level_info.f_max_buffer_overflow = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_intra = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_inter = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_slice_header = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_sao = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_split_cu_flag = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_cu_hdr_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_split_tu_flag = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_qp_delta_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_cbf_luma_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_cbf_chroma_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_res_luma_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_res_chroma_bits = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_ref_id = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_mvd = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_merge_flag = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_mpm_luma = 0;

            ps_curr_inp->s_pic_level_info.u8_bits_estimated_mpm_chroma = 0;

            if(1 == ps_curr_inp->i4_frm_proc_valid_flag)

            {

                /* --- Init of buffering period and pic timing SEI related params ----*/

                {

                    UWORD32 i4_dbf, i4_buffersize, i4_trgt_bit_rate;

                    if(ps_enc_ctxt->ps_stat_prms->s_config_prms.i4_rate_control_mode != 3)

                    {

                        ihevce_get_dbf_buffer_size(

                            (void *)ps_enc_ctxt->s_module_ctxt.apv_rc_ctxt[i4_bitrate_instance_num],

                            &i4_buffersize,

                            &i4_dbf,

                            &i4_trgt_bit_rate);

                    }

                    else

                    {

                        /* Default initializations in CQP mode */

                        WORD32 codec_level =

                            ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.as_tgt_params[0]

                                .i4_codec_level;

                        WORD32 codec_level_index = ihevce_get_level_index(codec_level);

                        WORD32 codec_tier =

                            ps_enc_ctxt->ps_stat_prms->s_out_strm_prms.i4_codec_tier;

                        i4_buffersize =

                            (UWORD32)g_as_level_data[codec_level_index].i4_max_cpb[codec_tier] *

                            CBP_VCL_FACTOR;

                        i4_trgt_bit_rate =

                            (UWORD32)g_as_level_data[codec_level_index].i4_max_bit_rate[codec_tier] *

                            CBP_VCL_FACTOR;

                        i4_dbf = i4_buffersize;

                    }

                    ps_curr_inp->s_sei.s_buf_period_sei_params.u4_buffer_size_sei = i4_buffersize;

                    ps_curr_inp->s_sei.s_buf_period_sei_params.u4_dbf_sei = i4_dbf;

                    ps_curr_inp->s_sei.s_buf_period_sei_params.u4_target_bit_rate_sei =

                        i4_trgt_bit_rate;

                    /* ----------------- Derivation of u4_au_cpb_removal_delay_minus1  --------------------------------*/

                    ps_curr_inp->s_sei.s_pic_timing_sei_params.u4_au_cpb_removal_delay_minus1 =

                        u4_au_cpb_removal_delay_minus1;

                    /* ----------------- Derivation of u4_pic_dpb_output_delay  --------------------------------*/

                    ps_curr_inp->s_sei.s_pic_timing_sei_params.u4_pic_dpb_output_delay =

                        ps_curr_inp->ps_sps->ai1_sps_max_num_reorder_pics[0] +

                        ps_curr_inp->i4_display_num - u4_encode_frm_num;

                }

                /* call the core entropy coding entry point function */

                entropy_error = ihevce_entropy_encode_frame(

                    pv_entropy_hdl, ps_curr_out, ps_curr_inp, ps_curr_out->i4_bitstream_buf_size);

                /* ----------------- Derivation of u4_au_cpb_removal_delay_minus1  --------------------------------*/

                if(ps_curr_inp->s_sei.i1_buf_period_params_present_flag)

                {

                    /* Reset u4_au_cpb_removal_delay_minus1 after every buffering period as subsequent pictiming is w.r.t new buffering period SEI */

                    u4_au_cpb_removal_delay_minus1 = 0;

                }

                else

                {

                    /* cpb delay is circularly incremented with wrap around based on max length signalled in VUI */

                    UWORD8 u1_au_cpb_removal_delay_length =

                        ps_curr_inp->ps_sps->s_vui_parameters.s_vui_hrd_parameters

                            .u1_au_cpb_removal_delay_length_minus1 +

                        1;

                    UWORD32 u4_max_cpb_removal_delay_val =

                        (1 << u1_au_cpb_removal_delay_length) - 1;

                    u4_au_cpb_removal_delay_minus1 = (u4_au_cpb_removal_delay_minus1 + 1) &

                                                     u4_max_cpb_removal_delay_val;

                }

                /* Debug prints for entropy error */

                if(entropy_error)

                {

                    DBG_PRINTF("Entropy encode error %x\n", entropy_error);

                    DEBUG("Entropy encode error %d\n", entropy_error);

                }

                if(ps_enc_ctxt->ps_stat_prms->s_config_prms.i4_rate_control_mode != 3)

                {

                    /* acquire mutex lock for rate control calls */

                    osal_mutex_lock(ps_enc_ctxt->pv_rc_mutex_lock_hdl);

                    /* get frame rate/bit rate/max buffer size */

                    ihevce_vbv_compliance_frame_level_update(

                        ps_enc_ctxt->s_module_ctxt.apv_rc_ctxt[i4_bitrate_instance_num],

                        (ps_curr_out->i4_bytes_generated << 3),

                        i4_resolution_id,

                        i4_bitrate_instance_num,

                        ps_curr_inp->s_sei.s_pic_timing_sei_params.u4_au_cpb_removal_delay_minus1);

                    /* release mutex lock after rate control calls */

                    osal_mutex_unlock(ps_enc_ctxt->pv_rc_mutex_lock_hdl);

                }

                /*correct the mismatch between rdopt and entropy thread mismatch*/

                {

                    /* acquire mutex lock for rate control calls */

                    osal_mutex_lock(ps_enc_ctxt->pv_rc_mutex_lock_hdl);

                    /*Set to -1 when no change in bitrate, other-wise set to encoder bufferfullness at that moment*/

                    ps_curr_out->i8_cur_vbv_level = ps_curr_inp->i8_buf_level_bitrate_change;

                    if(ps_curr_inp->i8_buf_level_bitrate_change != -1)

                    {

                        LWORD64 bitrate, buffer_size;

                        ASSERT(

                            i4_bitrate_instance_num ==

                            0);  //since dynamic change in bitrate is not supported in multi bitrate and resolution

                        get_avg_bitrate_bufsize(

                            ps_enc_ctxt->s_module_ctxt.apv_rc_ctxt[i4_bitrate_instance_num],

                            &bitrate,

                            &buffer_size);

                        change_bitrate_vbv_complaince(

                            ps_enc_ctxt->s_module_ctxt.apv_rc_ctxt[i4_bitrate_instance_num],

                            bitrate,

                            buffer_size);

                        /*Change bitrate in SEI-VUI related context as well*/

                        ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms

                            .as_tgt_params[ps_enc_ctxt->i4_resolution_id]

                            .ai4_tgt_bitrate[i4_bitrate_instance_num] = (WORD32)bitrate;

                        ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms

                            .as_tgt_params[ps_enc_ctxt->i4_resolution_id]

                            .ai4_max_vbv_buffer_size[i4_bitrate_instance_num] = (WORD32)buffer_size;

                    }

                    /*account for error to meet bitrate more precisely*/

                    ihevce_rc_rdopt_entropy_bit_correct(

                        ps_enc_ctxt->s_module_ctxt.apv_rc_ctxt[i4_bitrate_instance_num],

                        (ps_curr_out->i4_bytes_generated << 3),

                        inp_buf_id);  //ps_curr_inp->i4_inp_timestamp_low

                    /* release mutex lock after rate control calls */

                    osal_mutex_unlock(ps_enc_ctxt->pv_rc_mutex_lock_hdl);

                }

                u4_encode_frm_num++;

            }

            else

            {

                ps_curr_out->i4_bytes_generated = 0;

                ps_curr_out->i4_encoded_frame_type = IV_NA_FRAME;

            }

            ps_curr_out->i4_buf_id = out_buf_id;

            end_flag = ps_curr_inp->i4_end_flag;

            ps_curr_out->i4_end_flag = ps_curr_inp->i4_end_flag;

            if(1 == ps_enc_ctxt->s_multi_thrd.i4_force_end_flag)

            {

                end_flag = 1;

                ps_curr_out->i4_end_flag = 1;

            }

            if(!i4_use_dummy_buffer)

            {

                /* Call back to Apln. saying buffer is produced */

                ps_hle_ctxt->ihevce_output_strm_fill_done(

                    ps_hle_ctxt->pv_out_cb_handle,

                    ps_curr_out,

                    i4_bufque_id, /* br intance */

                    i4_out_res_id /* res_instance*/);

            }

            if(ps_curr_inp->i4_frm_proc_valid_flag)

            {

                ps_curr_inp->s_pic_level_info.u8_total_bits_generated =

                    ps_curr_out->i4_bytes_generated * 8;

            }

            /* --- release the current output buffer ---- */

            if(!i4_use_dummy_buffer)

            {

                ihevce_q_rel_buf(

                    (void *)ps_enc_ctxt, (IHEVCE_OUTPUT_DATA_Q + i4_bufque_id), out_buf_id);

            }

            /* release the input buffer*/

            ihevce_q_rel_buf(

                (void *)ps_enc_ctxt,

                (IHEVCE_FRM_PRS_ENT_COD_Q + i4_bitrate_instance_num),

                inp_buf_id);

            /* reset the pointers to NULL */

            ps_curr_inp = NULL;

            ps_curr_out = NULL;

        }

        else

        {

            end_flag = ps_curr_inp->i4_end_flag;

            if(NULL != ps_curr_inp)

            {

                /* release the input buffer*/

                ihevce_q_rel_buf(

                    (void *)ps_enc_ctxt,

                    (IHEVCE_FRM_PRS_ENT_COD_Q + i4_bitrate_instance_num),

                    inp_buf_id);

            }

            // ASSERT(0);

        }

        PROFILE_STOP(

            &ps_hle_ctxt->profile_entropy[ps_enc_ctxt->i4_resolution_id][i4_bitrate_instance_num],

            NULL);

    }

    /* Release all the buffers the application might have queued in */

    /* Do this only if its not a force end */

    if(1 != ps_enc_ctxt->s_multi_thrd.i4_force_end_flag)

    {

        end_flag = 0;

    }

    if(1 == ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.i4_mres_single_out)

    {

        ps_enc_ctxt->ps_stat_prms->i4_outbuf_buf_free_control = 1;

        i4_do_entr_last = ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id];

    }

    else

    {

        i4_do_entr_last = 1;

    }

    if((1 == i4_do_entr_last) && (!i4_use_dummy_buffer))

    {

        while(0 == end_flag)

        {

            if(1 == ps_enc_ctxt->ps_stat_prms->i4_outbuf_buf_free_control)  //FFMPEG application

            {

                /* ------- get a filled descriptor from output Que ------------ */

                ps_curr_out = (iv_output_data_buffs_t *)ihevce_q_get_filled_buff(

                    (void *)ps_enc_ctxt,

                    (IHEVCE_OUTPUT_DATA_Q + i4_bufque_id),

                    &out_buf_id,

                    BUFF_QUE_NON_BLOCKING_MODE);

                /* Update the end_flag from application */

                end_flag = (ps_curr_out == NULL);

            }

            else if(

                0 == ps_enc_ctxt->ps_stat_prms

                         ->i4_outbuf_buf_free_control)  // process call control based application

            {

                ps_curr_out = (iv_output_data_buffs_t *)ihevce_q_get_filled_buff(

                    (void *)ps_enc_ctxt,

                    (IHEVCE_OUTPUT_DATA_Q + i4_bufque_id),

                    &out_buf_id,

                    BUFF_QUE_BLOCKING_MODE);

            }

            else

            {

                /* should not enter here */

                ASSERT(0);

            }

            if(ps_curr_out)

            {

                end_flag = ps_curr_out->i4_is_last_buf;

                /* Fill the min. necessory things */

                ps_curr_out->i4_process_ret_sts = IV_SUCCESS;

                ps_curr_out->i4_end_flag = 1;

                ps_curr_out->i4_bytes_generated = 0;

                /* Call back to Apln. saying buffer is produced */

                ps_hle_ctxt->ihevce_output_strm_fill_done(

                    ps_hle_ctxt->pv_out_cb_handle,

                    ps_curr_out,

                    i4_bufque_id, /* br intance */

                    i4_out_res_id /* res_instance*/);

                /* --- release the current output buffer ---- */

                ihevce_q_rel_buf(

                    (void *)ps_enc_ctxt, (IHEVCE_OUTPUT_DATA_Q + i4_bufque_id), out_buf_id);

            }

        }

    }

    if(1 == ps_enc_ctxt->ps_stat_prms->s_tgt_lyr_prms.i4_mres_single_out)

    {

        /* Mres single out usecase: Set active res_id to zero for curretn res so that other resolutions exit entropy */

        ps_enc_ctxt->s_multi_thrd.pi4_active_res_id[i4_resolution_id] = 0;

    }

    return (0);

}

/**

******************************************************************************

*

*  @brief Generate sps, pps and vps header for

*

*  @par   Description

*  This function generates nal headers like SPS/PPS/VPS

*

*  @param[in]   ps_hle_ctxt

*  pointer to high level interface context (handle)

*

*  @param[in]   i4_bitrate_instance_id

*  bitrate id

*

*  @param[in]   i4_resolution_id

*  resolution id

*

*  @return      success or failure error code

*

******************************************************************************

*/

WORD32 ihevce_entropy_encode_header(

    ihevce_hle_ctxt_t *ps_hle_ctxt, WORD32 i4_bitrate_instance_id, WORD32 i4_resolution_id)

{

    WORD32 ret = IHEVCE_SUCCESS;

    bitstrm_t s_bit_strm;

    bitstrm_t *ps_bitstrm = &s_bit_strm;

    enc_ctxt_t *ps_enc_ctxt;

    ihevce_tgt_layer_params_t *ps_tgt_lyr_prms;

    sps_t *ps_sps;

    vps_t *ps_vps;

    pps_t *ps_pps;

    iv_output_data_buffs_t *ps_curr_out = NULL;

    WORD32 out_buf_id;

    /* sanity checks */

    if((ps_hle_ctxt == NULL) || (ps_hle_ctxt->i4_size != sizeof(ihevce_hle_ctxt_t)) ||

       ps_hle_ctxt->i4_hle_init_done != 1)

        return IHEVCE_FAIL;

    ps_tgt_lyr_prms = (ihevce_tgt_layer_params_t *)&ps_hle_ctxt->ps_static_cfg_prms->s_tgt_lyr_prms;

    if(i4_resolution_id >= ps_tgt_lyr_prms->i4_num_res_layers)

        return IHEVCE_FAIL;

    if(i4_bitrate_instance_id >=

       ps_tgt_lyr_prms->as_tgt_params[i4_resolution_id].i4_num_bitrate_instances)

        return IHEVCE_FAIL;

    ps_enc_ctxt = (enc_ctxt_t *)ps_hle_ctxt->apv_enc_hdl[i4_resolution_id];

    ps_sps = &ps_enc_ctxt->as_sps[i4_bitrate_instance_id];

    ps_vps = &ps_enc_ctxt->as_vps[i4_bitrate_instance_id];

    ps_pps = &ps_enc_ctxt->as_pps[i4_bitrate_instance_id];

    /* ------- get a filled descriptor from output Que ------------ */

    ps_curr_out = (iv_output_data_buffs_t *)ihevce_q_get_filled_buff(

        (void *)ps_enc_ctxt,

        (IHEVCE_OUTPUT_DATA_Q + i4_bitrate_instance_id),

        &out_buf_id,

        BUFF_QUE_BLOCKING_MODE);

    /* Initialize the bitstream engine */

    ret |= ihevce_bitstrm_init(

        ps_bitstrm, (UWORD8 *)ps_curr_out->pv_bitstream_bufs, ps_curr_out->i4_bitstream_buf_size);

    /* Reset Bitstream NAL counter */

    ps_bitstrm->i4_num_nal = 0;

    /* generate vps */

    ret |= ihevce_generate_vps(ps_bitstrm, ps_vps);

    /* generate sps */

    ret |= ihevce_generate_sps(ps_bitstrm, ps_sps);

    /* generate pps */

    ret |= ihevce_generate_pps(ps_bitstrm, ps_pps);

    /* attach the time stamp of the input to output */

    ps_curr_out->i4_out_timestamp_low = 0;

    ps_curr_out->i4_out_timestamp_high = 0;

    /*attach the app frame info of this buffer */

    ps_curr_out->pv_app_frm_ctxt = NULL;

    /* frame never skipped for now */

    ps_curr_out->i4_frame_skipped = 0;

    /* update error code and return */

    ps_curr_out->i4_process_error_code = ret;

    ps_curr_out->i4_bytes_generated = ps_bitstrm->u4_strm_buf_offset;

    /* ------------------- Initialize non-VCL prefix NAL Size/offsets --------------------*/

    {

        WORD32 num_non_vcl_prefix_nals = ps_bitstrm->i4_num_nal;

        WORD32 ctr = 0;

        ASSERT(num_non_vcl_prefix_nals <= MAX_NUM_PREFIX_NALS_PER_AU);

        ps_curr_out->i4_num_non_vcl_prefix_nals = num_non_vcl_prefix_nals;

        for(ctr = 0; ctr < MIN(num_non_vcl_prefix_nals, MAX_NUM_PREFIX_NALS_PER_AU); ctr++)

        {

            /* NAL offset is derive by subtracting Bistream base from NAL start pointer */

            ULWORD64 u8_cur_nal_start = (ULWORD64)ps_bitstrm->apu1_nal_start[ctr];

#if POPULATE_NAL_SIZE

            /* ----------Populate NAL Size  -------------*/

            if((ctr + 1) < num_non_vcl_prefix_nals)

            {

                ULWORD64 u8_next_nal_start = (ULWORD64)ps_bitstrm->apu1_nal_start[ctr + 1];

                ps_curr_out->ai4_size_non_vcl_prefix_nals[ctr] =

                    (UWORD32)(u8_next_nal_start - u8_cur_nal_start);

            }

            else

            {

                ULWORD64 u8_next_nal_start =

                    (ULWORD64)ps_bitstrm->pu1_strm_buffer + ps_bitstrm->u4_strm_buf_offset;

                ps_curr_out->ai4_size_non_vcl_prefix_nals[ctr] =

                    (UWORD32)(u8_next_nal_start - u8_cur_nal_start);

            }

            ASSERT(ps_curr_out->ai4_size_non_vcl_prefix_nals[ctr] > 0);

#elif POPULATE_NAL_OFFSET

            /* ----------Populate NAL Offset  -------------*/

            ASSERT(u8_cur_nal_start >= u8_bitstream_base);

            ps_curr_out->ai4_off_non_vcl_prefix_nals[ctr] =

                (UWORD32)(u8_cur_nal_start - u8_bitstream_base);

            if(ctr)

            {

                /* sanity check on increasing NAL offsets */

                ASSERT(

                    ps_curr_out->ai4_off_non_vcl_prefix_nals[ctr] >

                    ps_curr_out->ai4_off_non_vcl_prefix_nals[ctr - 1]);

            }

#endif /* POPULATE_NAL_SIZE */

        }

    }

    ps_curr_out->i4_buf_id = out_buf_id;

    ps_curr_out->i4_end_flag = 0;

    if(IHEVCE_SUCCESS == ret)

    {

        ps_curr_out->i4_process_ret_sts = IV_SUCCESS;

    }

    else

    {

        ps_curr_out->i4_process_ret_sts = IV_FAIL;

    }

    ps_curr_out->i4_encoded_frame_type = IV_NA_FRAME;

    /* Call back to Apln. saying buffer is produced */

    ps_hle_ctxt->ihevce_output_strm_fill_done(

        ps_hle_ctxt->pv_out_cb_handle, ps_curr_out, i4_bitrate_instance_id, i4_resolution_id);

    /* release the input buffer*/

    ihevce_q_rel_buf(

        (void *)ps_enc_ctxt, (IHEVCE_OUTPUT_DATA_Q + i4_bitrate_instance_id), out_buf_id);

    return ret;

}