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

 *

 * Copyright (C) 2015 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

*  ih264e_encode.c

*

* @brief

*  This file contains functions for encoding the input yuv frame in synchronous

*  api mode

*

* @author

*  ittiam

*

* List of Functions

*  - ih264e_join_threads

*  - ih264e_wait_for_thread

*  - ih264e_encode

*

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

*/

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

/* File Includes                                                             */

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

/* System Include files */

#include <stdio.h>

#include <stddef.h>

#include <stdlib.h>

#include <string.h>

#include <assert.h>

#include <limits.h>

#include <stdbool.h>

/* User Include Files */

#include "ih264e_config.h"

#include "ih264_typedefs.h"

#include "iv2.h"

#include "ive2.h"

#include "ithread.h"

#include "ih264_debug.h"

#include "ih264_macros.h"

#include "ih264_error.h"

#include "ih264_defs.h"

#include "ih264_mem_fns.h"

#include "ih264_padding.h"

#include "ih264_structs.h"

#include "ih264_trans_quant_itrans_iquant.h"

#include "ih264_inter_pred_filters.h"

#include "ih264_intra_pred_filters.h"

#include "ih264_deblk_edge_filters.h"

#include "ih264_cabac_tables.h"

#include "ih264_buf_mgr.h"

#include "ih264_list.h"

#include "ih264_dpb_mgr.h"

#include "ih264_platform_macros.h"

#include "ime_defs.h"

#include "ime_distortion_metrics.h"

#include "ime_structs.h"

#include "irc_mem_req_and_acq.h"

#include "irc_cntrl_param.h"

#include "irc_frame_info_collector.h"

#include "ih264e.h"

#include "ih264e_error.h"

#include "ih264e_defs.h"

#include "ih264e_time_stamp.h"

#include "ih264e_rate_control.h"

#include "ih264e_bitstream.h"

#include "ih264e_cabac_structs.h"

#include "ih264e_structs.h"

#include "ih264e_utils.h"

#include "ih264e_encode_header.h"

#include "ih264e_master.h"

#include "ih264e_process.h"

#include "ih264e_fmt_conv.h"

#include "ih264e_statistics.h"

#include "ih264e_trace.h"

#ifdef LOGO_EN

#include "ih264e_ittiam_logo.h"

#endif

#define SEI_BASED_FORCE_IDR 1

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

/* Function Definitions                                                      */

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

/**

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

*

* @brief

*  This function joins all the spawned threads after successful completion of

*  their tasks

*

* @par   Description

*

* @param[in] ps_codec

*  pointer to codec context

*

* @returns  none

*

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

*/

void ih264e_join_threads(codec_t *ps_codec)

{

    /* temp var */

   WORD32 i = 0;

   WORD32 ret = 0;

   /* join spawned threads */

   while (i < ps_codec->i4_proc_thread_cnt)

   {

       if (ps_codec->ai4_process_thread_created[i])

       {

           ret = ithread_join(ps_codec->apv_proc_thread_handle[i], NULL);

           if (ret != 0)

           {

               printf("pthread Join Failed");

               assert(0);

           }

           ps_codec->ai4_process_thread_created[i] = 0;

           i++;

       }

   }

   ps_codec->i4_proc_thread_cnt = 0;

}

/**

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

*

* @brief This function puts the current thread to sleep for a duration

*  of sleep_us

*

* @par Description

*  ithread_yield() method causes the calling thread to yield execution to another

*  thread that is ready to run on the current processor. The operating system

*  selects the thread to yield to. ithread_usleep blocks the current thread for

*  the specified number of milliseconds. In other words, yield just says,

*  end my timeslice prematurely, look around for other threads to run. If there

*  is nothing better than me, continue. Sleep says I don't want to run for x

*  milliseconds. Even if no other thread wants to run, don't make me run.

*

* @param[in] sleep_us

*  thread sleep duration

*

* @returns error_status

*

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

*/

IH264E_ERROR_T ih264e_wait_for_thread(UWORD32 sleep_us)

{

    /* yield thread */

    ithread_yield();

    /* put thread to sleep */

    ithread_usleep(sleep_us);

    return IH264E_SUCCESS;

}

/**

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

*

* @brief

*  Used to test validity of input dimensions

*

* @par Description:

*  Dimensions of the input buffer passed to encode call are validated

*

* @param[in] ps_codec

*  Codec context

*

* @param[in] ps_ip

*  Pointer to input structure

*

* @param[out] ps_op

*  Pointer to output structure

*

* @returns error status

*

* @remarks none

*

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

*/

static IV_STATUS_T api_check_input_dimensions(codec_t *ps_codec,

                                              ih264e_video_encode_ip_t *ps_ip,

                                              ih264e_video_encode_op_t *ps_op)

{

    UWORD32 u4_wd, u4_ht;

    cfg_params_t *ps_curr_cfg = &ps_codec->s_cfg;

    iv_raw_buf_t *ps_inp_buf = &ps_ip->s_ive_ip.s_inp_buf;

    u4_wd = ps_inp_buf->au4_wd[0];

    u4_ht = ps_inp_buf->au4_ht[0];

    switch (ps_inp_buf->e_color_fmt)

    {

        case IV_YUV_420P:

            if (((ps_inp_buf->au4_wd[0] / 2) != ps_inp_buf->au4_wd[1]) ||

                            ((ps_inp_buf->au4_wd[0] / 2) != ps_inp_buf->au4_wd[2]) ||

                            (ps_inp_buf->au4_wd[1] != ps_inp_buf->au4_wd[2]))

            {

                ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

                ps_op->s_ive_op.u4_error_code |= IH264E_WIDTH_NOT_SUPPORTED;

                return (IV_FAIL);

            }

            if (((ps_inp_buf->au4_ht[0] / 2) != ps_inp_buf->au4_ht[1]) ||

                            ((ps_inp_buf->au4_ht[0] / 2) != ps_inp_buf->au4_ht[2]) ||

                            (ps_inp_buf->au4_ht[1] != ps_inp_buf->au4_ht[2]))

            {

                ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

                ps_op->s_ive_op.u4_error_code |= IH264E_HEIGHT_NOT_SUPPORTED;

                return (IV_FAIL);

            }

            break;

        case IV_YUV_420SP_UV:

        case IV_YUV_420SP_VU:

            if (ps_inp_buf->au4_wd[0] != ps_inp_buf->au4_wd[1])

            {

                ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

                ps_op->s_ive_op.u4_error_code |= IH264E_WIDTH_NOT_SUPPORTED;

                return (IV_FAIL);

            }

            if ((ps_inp_buf->au4_ht[0] / 2) != ps_inp_buf->au4_ht[1])

            {

                ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

                ps_op->s_ive_op.u4_error_code |= IH264E_HEIGHT_NOT_SUPPORTED;

                return (IV_FAIL);

            }

            break;

        case IV_YUV_422ILE:

            u4_wd = ps_inp_buf->au4_wd[0] / 2;

            break;

        default:

            ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

            ps_op->s_ive_op.u4_error_code |= IH264E_INPUT_CHROMA_FORMAT_NOT_SUPPORTED;

            return (IV_FAIL);

    }

    if (u4_wd != ps_curr_cfg->u4_disp_wd)

    {

        ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

        ps_op->s_ive_op.u4_error_code |= IH264E_WIDTH_NOT_SUPPORTED;

        return (IV_FAIL);

    }

    if (u4_ht != ps_curr_cfg->u4_disp_ht)

    {

        ps_op->s_ive_op.u4_error_code |= 1 << IVE_UNSUPPORTEDPARAM;

        ps_op->s_ive_op.u4_error_code |= IH264E_HEIGHT_NOT_SUPPORTED;

        return (IV_FAIL);

    }

    return IV_SUCCESS;

}

/**

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

*

* @brief

*  Encodes in synchronous api mode

*

* @par Description

*  This routine processes input yuv, encodes it and outputs bitstream and recon

*

* @param[in] ps_codec_obj

*  Pointer to codec object at API level

*

* @param[in] pv_api_ip

*  Pointer to input argument structure

*

* @param[out] pv_api_op

*  Pointer to output argument structure

*

* @returns  Status

*

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

*/

WORD32 ih264e_encode(iv_obj_t *ps_codec_obj, void *pv_api_ip, void *pv_api_op)

{

    /* error status */

    IH264E_ERROR_T error_status = IH264E_SUCCESS;

    /* codec ctxt */

    codec_t *ps_codec = (codec_t *)ps_codec_obj->pv_codec_handle;

    /* input frame to encode */

    ih264e_video_encode_ip_t *ps_video_encode_ip = pv_api_ip;

    /* output buffer to write stream */

    ih264e_video_encode_op_t *ps_video_encode_op = pv_api_op;

    /* i/o structures */

    inp_buf_t s_inp_buf = {};

    out_buf_t s_out_buf = {};

    /* temp var */

    WORD32 ctxt_sel = 0, i, i4_rc_pre_enc_skip;

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

    /*                            BEGIN INIT                            */

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

    /* reset output structure */

    ps_video_encode_op->s_ive_op.u4_error_code = IV_SUCCESS;

    ps_video_encode_op->s_ive_op.output_present  = 0;

    ps_video_encode_op->s_ive_op.dump_recon = 0;

    ps_video_encode_op->s_ive_op.u4_encoded_frame_type = IV_NA_FRAME;

    /* By default set the current input buffer as the buffer to be freed */

    /* This will later be updated to the actual input that gets encoded */

    ps_video_encode_op->s_ive_op.s_inp_buf = ps_video_encode_ip->s_ive_ip.s_inp_buf;

    if (ps_codec->i4_error_code & (1 << IVE_FATALERROR))

    {

        error_status = ps_codec->i4_error_code & 0xFF;

        SET_ERROR_ON_RETURN(error_status,

                            IVE_FATALERROR,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

    }

    /* Check for output memory allocation size */

    if (ps_video_encode_ip->s_ive_ip.s_out_buf.u4_bufsize < MIN_STREAM_SIZE)

    {

        error_status = IH264E_INSUFFICIENT_OUTPUT_BUFFER;

        SET_ERROR_ON_RETURN(error_status,

                            IVE_UNSUPPORTEDPARAM,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

    }

    if (ps_codec->i4_init_done != 1)

    {

        error_status = IH264E_INIT_NOT_DONE;

        SET_ERROR_ON_RETURN(error_status,

                            IVE_FATALERROR,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

    }

    /* copy output info. to internal structure */

    s_out_buf.s_bits_buf = ps_video_encode_ip->s_ive_ip.s_out_buf;

    s_out_buf.u4_is_last = 0;

    s_out_buf.u4_timestamp_low = ps_video_encode_ip->s_ive_ip.u4_timestamp_low;

    s_out_buf.u4_timestamp_high = ps_video_encode_ip->s_ive_ip.u4_timestamp_high;

    /* api call cnt */

    ps_codec->i4_encode_api_call_cnt += 1;

    /* codec context selector */

    ctxt_sel = ps_codec->i4_encode_api_call_cnt % MAX_CTXT_SETS;

    /* reset status flags */

    ps_codec->ai4_pic_cnt[ctxt_sel] = -1;

    ps_codec->s_rate_control.post_encode_skip[ctxt_sel] = 0;

    ps_codec->s_rate_control.pre_encode_skip[ctxt_sel] = 0;

    /* pass output buffer to codec */

    ps_codec->as_out_buf[ctxt_sel] = s_out_buf;

    /* initialize codec ctxt with default params for the first encode api call */

    if (ps_codec->i4_encode_api_call_cnt == 0)

    {

        ih264e_codec_init(ps_codec);

    }

    /* parse configuration params */

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

    {

        cfg_params_t *ps_cfg = &ps_codec->as_cfg[i];

        if (1 == ps_cfg->u4_is_valid)

        {

            if ( ((ps_cfg->u4_timestamp_high == ps_video_encode_ip->s_ive_ip.u4_timestamp_high) &&

                            (ps_cfg->u4_timestamp_low == ps_video_encode_ip->s_ive_ip.u4_timestamp_low)) ||

                            ((WORD32)ps_cfg->u4_timestamp_high == -1) ||

                            ((WORD32)ps_cfg->u4_timestamp_low == -1) )

            {

                error_status = ih264e_codec_update_config(ps_codec, ps_cfg);

                SET_ERROR_ON_RETURN(error_status,

                                    IVE_FATALERROR,

                                    ps_video_encode_op->s_ive_op.u4_error_code,

                                    IV_FAIL);

                ps_cfg->u4_is_valid = 0;

            }

        }

    }

    /* Force IDR based on SEI params */

#if SEI_BASED_FORCE_IDR

    {

        int i;

        bool au4_sub_layer_num_units_in_shutter_interval_flag = 0;

        sei_mdcv_params_t *ps_sei_mdcv_params = &ps_codec->s_sei.s_sei_mdcv_params;

        sei_mdcv_params_t *ps_cfg_sei_mdcv_params =

                                &ps_codec->s_cfg.s_sei.s_sei_mdcv_params;

        sei_cll_params_t *ps_sei_cll_params = &ps_codec->s_sei.s_sei_cll_params;

        sei_cll_params_t *ps_cfg_sei_cll_params =

                                &ps_codec->s_cfg.s_sei.s_sei_cll_params;

        sei_ave_params_t *ps_sei_ave_params = &ps_codec->s_sei.s_sei_ave_params;

        sei_ave_params_t *ps_cfg_sei_ave_params =

                                &ps_codec->s_cfg.s_sei.s_sei_ave_params;

        sei_sii_params_t *ps_sei_sii_params = &ps_codec->s_sei.s_sei_sii_params;

        sei_sii_params_t *ps_cfg_sei_sii_params = &ps_codec->s_cfg.s_sei.s_sei_sii_params;

        if((ps_sei_mdcv_params->au2_display_primaries_x[0]!=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_x[0]) ||

            (ps_sei_mdcv_params->au2_display_primaries_x[1] !=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_x[1]) ||

            (ps_sei_mdcv_params->au2_display_primaries_x[2] !=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_x[2]) ||

            (ps_sei_mdcv_params->au2_display_primaries_y[0] !=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_y[0]) ||

            (ps_sei_mdcv_params->au2_display_primaries_y[1] !=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_y[1]) ||

            (ps_sei_mdcv_params->au2_display_primaries_y[2] !=

                                ps_cfg_sei_mdcv_params->au2_display_primaries_y[2]) ||

            (ps_sei_mdcv_params->u2_white_point_x !=

                                ps_cfg_sei_mdcv_params->u2_white_point_x) ||

            (ps_sei_mdcv_params->u2_white_point_y !=

                                ps_cfg_sei_mdcv_params->u2_white_point_y) ||

            (ps_sei_mdcv_params->u4_max_display_mastering_luminance !=

                                ps_cfg_sei_mdcv_params->u4_max_display_mastering_luminance) ||

            (ps_sei_mdcv_params->u4_min_display_mastering_luminance !=

                                ps_cfg_sei_mdcv_params->u4_min_display_mastering_luminance))

        {

            ps_codec->s_sei.s_sei_mdcv_params = ps_codec->s_cfg.s_sei.s_sei_mdcv_params;

            ps_codec->s_sei.u1_sei_mdcv_params_present_flag = 1;

        }

        else

        {

            ps_codec->s_sei.u1_sei_mdcv_params_present_flag = 0;

        }

        if((ps_sei_cll_params->u2_max_content_light_level !=

                                ps_cfg_sei_cll_params->u2_max_content_light_level) ||

                (ps_sei_cll_params->u2_max_pic_average_light_level !=

                                ps_cfg_sei_cll_params->u2_max_pic_average_light_level))

        {

            ps_codec->s_sei.s_sei_cll_params = ps_codec->s_cfg.s_sei.s_sei_cll_params;

            ps_codec->s_sei.u1_sei_cll_params_present_flag = 1;

        }

        else

        {

            ps_codec->s_sei.u1_sei_cll_params_present_flag = 0;

        }

        if((ps_sei_ave_params->u4_ambient_illuminance !=

                                ps_cfg_sei_ave_params->u4_ambient_illuminance) ||

                (ps_sei_ave_params->u2_ambient_light_x !=

                                ps_cfg_sei_ave_params->u2_ambient_light_x) ||

                (ps_sei_ave_params->u2_ambient_light_y !=

                                ps_cfg_sei_ave_params->u2_ambient_light_y))

        {

            ps_codec->s_sei.s_sei_ave_params = ps_codec->s_cfg.s_sei.s_sei_ave_params;

            ps_codec->s_sei.u1_sei_ave_params_present_flag = 1;

        }

        else

        {

            ps_codec->s_sei.u1_sei_ave_params_present_flag = 0;

        }

        for(i = 0; i <= ps_cfg_sei_sii_params->u1_sii_max_sub_layers_minus1; i++)

        {

            au4_sub_layer_num_units_in_shutter_interval_flag =

                (au4_sub_layer_num_units_in_shutter_interval_flag ||

                 (ps_sei_sii_params->au4_sub_layer_num_units_in_shutter_interval[i] !=

                  ps_cfg_sei_sii_params->au4_sub_layer_num_units_in_shutter_interval[i]));

        }

        if((ps_sei_sii_params->u4_sii_sub_layer_idx !=

            ps_cfg_sei_sii_params->u4_sii_sub_layer_idx) ||

           (ps_sei_sii_params->u1_shutter_interval_info_present_flag !=

            ps_cfg_sei_sii_params->u1_shutter_interval_info_present_flag) ||

           (ps_sei_sii_params->u4_sii_time_scale != ps_cfg_sei_sii_params->u4_sii_time_scale) ||

           (ps_sei_sii_params->u1_fixed_shutter_interval_within_cvs_flag !=

            ps_cfg_sei_sii_params->u1_fixed_shutter_interval_within_cvs_flag) ||

           (ps_sei_sii_params->u4_sii_num_units_in_shutter_interval !=

            ps_cfg_sei_sii_params->u4_sii_num_units_in_shutter_interval) ||

           (ps_sei_sii_params->u1_sii_max_sub_layers_minus1 !=

            ps_cfg_sei_sii_params->u1_sii_max_sub_layers_minus1) ||

           au4_sub_layer_num_units_in_shutter_interval_flag)

        {

            ps_codec->s_sei.s_sei_sii_params = ps_codec->s_cfg.s_sei.s_sei_sii_params;

            ps_codec->s_sei.u1_sei_sii_params_present_flag = 1;

        }

        else

        {

            ps_codec->s_sei.u1_sei_sii_params_present_flag = 0;

        }

        if((1 == ps_codec->s_sei.u1_sei_mdcv_params_present_flag) ||

                (1 == ps_codec->s_sei.u1_sei_cll_params_present_flag) ||

           (1 == ps_codec->s_sei.u1_sei_ave_params_present_flag) ||

           (1 == ps_codec->s_sei.u1_sei_sii_params_present_flag))

        {

            ps_codec->force_curr_frame_type = IV_IDR_FRAME;

        }

    }

#endif

    if (ps_video_encode_ip->s_ive_ip.s_inp_buf.apv_bufs[0] != NULL &&

                    ps_codec->i4_header_mode != 1)

    {

        if (IV_SUCCESS != api_check_input_dimensions(ps_codec, pv_api_ip, pv_api_op))

        {

            error_status = IH264E_FAIL;

            SET_ERROR_ON_RETURN(error_status,

                                IVE_FATALERROR,

                                ps_video_encode_op->s_ive_op.u4_error_code,

                                IV_FAIL);

        }

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

         * INSERT LOGO

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

#ifdef LOGO_EN

        ih264e_insert_logo(ps_video_encode_ip->s_ive_ip.s_inp_buf.apv_bufs[0],

                           ps_video_encode_ip->s_ive_ip.s_inp_buf.apv_bufs[1],

                           ps_video_encode_ip->s_ive_ip.s_inp_buf.apv_bufs[2],

                           ps_video_encode_ip->s_ive_ip.s_inp_buf.au4_strd[0],

                           0,

                           0,

                           ps_codec->s_cfg.e_inp_color_fmt,

                           ps_codec->s_cfg.u4_disp_wd,

                           ps_codec->s_cfg.u4_disp_ht);

#endif /*LOGO_EN*/

    }

    /* In case of alt ref and B pics we will have non reference frame in stream */

    if (ps_codec->s_cfg.u4_enable_alt_ref || ps_codec->s_cfg.u4_num_bframes)

    {

        ps_codec->i4_non_ref_frames_in_stream = 1;

    }

    if (ps_codec->i4_encode_api_call_cnt == 0)

    {

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

        /*   number of mv/ref bank buffers used by the codec,               */

        /*      1 to handle curr frame                                      */

        /*      1 to store information of ref frame                         */

        /*      1 more additional because of the codec employs 2 ctxt sets  */

        /*        to assist asynchronous API                                */

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

        /* initialize mv bank buffer manager */

        error_status = ih264e_mv_buf_mgr_add_bufs(ps_codec);

        SET_ERROR_ON_RETURN(error_status,

                            IVE_FATALERROR,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

        /* initialize ref bank buffer manager */

        error_status = ih264e_pic_buf_mgr_add_bufs(ps_codec);

        SET_ERROR_ON_RETURN(error_status,

                            IVE_FATALERROR,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

        /* for the first frame, generate header when not requested explicitly */

        if (ps_codec->i4_header_mode == 0 &&

                        ps_codec->u4_header_generated == 0)

        {

            ps_codec->i4_gen_header = 1;

        }

    }

    /* generate header and return when encoder is operated in header mode */

    if (ps_codec->i4_header_mode == 1)

    {

        /* whenever the header is generated, this implies a start of sequence

         * and a sequence needs to be started with IDR

         */

        ps_codec->force_curr_frame_type = IV_IDR_FRAME;

        /* generate header */

        error_status = ih264e_generate_sps_pps(ps_codec);

        /* send the input to app */

        ps_video_encode_op->s_ive_op.s_inp_buf = ps_video_encode_ip->s_ive_ip.s_inp_buf;

        ps_video_encode_op->s_ive_op.u4_timestamp_low = ps_video_encode_ip->s_ive_ip.u4_timestamp_low;

        ps_video_encode_op->s_ive_op.u4_timestamp_high = ps_video_encode_ip->s_ive_ip.u4_timestamp_high;

        ps_video_encode_op->s_ive_op.u4_is_last = ps_video_encode_ip->s_ive_ip.u4_is_last;

        /* send the output to app */

        ps_video_encode_op->s_ive_op.output_present  = 1;

        ps_video_encode_op->s_ive_op.dump_recon = 0;

        ps_video_encode_op->s_ive_op.s_out_buf = ps_codec->as_out_buf[ctxt_sel].s_bits_buf;

        /* error status */

        SET_ERROR_ON_RETURN(error_status,

                            IVE_UNSUPPORTEDPARAM,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

        /* indicates that header has been generated previously */

        ps_codec->u4_header_generated = 1;

        /* api call cnt */

        ps_codec->i4_encode_api_call_cnt --;

        /* header mode tag is not sticky */

        ps_codec->i4_header_mode = 0;

        ps_codec->i4_gen_header = 0;

        return IV_SUCCESS;

    }

    /* curr pic cnt */

    ps_codec->i4_pic_cnt += 1;

    i4_rc_pre_enc_skip = 0;

    i4_rc_pre_enc_skip = ih264e_input_queue_update(

                    ps_codec, &ps_video_encode_ip->s_ive_ip, &s_inp_buf);

    s_out_buf.u4_is_last = s_inp_buf.u4_is_last;

    ps_video_encode_op->s_ive_op.u4_is_last = s_inp_buf.u4_is_last;

    /* Send the input to application so that it can free it */

    ps_video_encode_op->s_ive_op.s_inp_buf = s_inp_buf.s_raw_buf;

    /* Only encode if the current frame is not pre-encode skip */

    if (!i4_rc_pre_enc_skip && s_inp_buf.s_raw_buf.apv_bufs[0])

    {

        /* proc ctxt base idx */

        WORD32 proc_ctxt_select = ctxt_sel * MAX_PROCESS_THREADS;

        /* proc ctxt */

        process_ctxt_t *ps_proc = &ps_codec->as_process[proc_ctxt_select];

        WORD32 ret = 0;

        /* number of addl. threads to be created */

        WORD32 num_thread_cnt = ps_codec->s_cfg.u4_num_cores - 1;

        /* array giving pic cnt that is being processed in curr context set */

        ps_codec->ai4_pic_cnt[ctxt_sel] = ps_codec->i4_pic_cnt;

        /* initialize all relevant process ctxts */

        error_status = ih264e_pic_init(ps_codec, &s_inp_buf);

        SET_ERROR_ON_RETURN(error_status,

                            IVE_FATALERROR,

                            ps_video_encode_op->s_ive_op.u4_error_code,

                            IV_FAIL);

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

        {

            ret = ithread_create(ps_codec->apv_proc_thread_handle[i],

                                 NULL,

                                 (void *)ih264e_process_thread,

                                 &ps_codec->as_process[i + 1]);

            if (ret != 0)

            {

                printf("pthread Create Failed");

                assert(0);

            }

            ps_codec->ai4_process_thread_created[i] = 1;

            ps_codec->i4_proc_thread_cnt++;

        }

        /* launch job */

        ih264e_process_thread(ps_proc);

        /* Join threads at the end of encoding a frame */

        ih264e_join_threads(ps_codec);

        ih264_list_reset(ps_codec->pv_proc_jobq);

        ih264_list_reset(ps_codec->pv_entropy_jobq);

        error_status = ih264e_update_rc_post_enc(ps_codec, ctxt_sel, (ps_codec->i4_poc == 0));

        SET_ERROR_ON_RETURN(error_status,

                            ((error_status == IH264E_BITSTREAM_BUFFER_OVERFLOW) ?

                                            IVE_UNSUPPORTEDPARAM : IVE_FATALERROR),

                            ps_video_encode_op->s_ive_op.u4_error_code, IV_FAIL);

        if (ps_codec->s_cfg.u4_enable_quality_metrics & QUALITY_MASK_PSNR)

        {

            ih264e_compute_quality_stats(ps_proc);

        }

    }

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

   * RECON

   *    Since we have forward dependent frames, we cannot return recon in encoding

   *    order. It must be in poc order, or input pic order. To achieve this we

   *    introduce a delay of 1 to the recon wrt encode. Now since we have that

   *    delay, at any point minimum of pic_cnt in our ref buffer will be the

   *    correct frame. For ex let our GOP be IBBP [1 2 3 4] . The encode order

   *    will be [1 4 2 3] .Now since we have a delay of 1, when we are done with

   *    encoding 4, the min in the list will be 1. After encoding 2, it will be

   *    2, 3 after 3 and 4 after 4. Hence we can return in sequence. Note

   *    that the 1 delay is critical. Hence if we have post enc skip, we must

   *    skip here too. Note that since post enc skip already frees the recon

   *    buffer we need not do any thing here

   *

   *    We need to return a recon when ever we consume an input buffer. This

   *    comsumption include a pre or post enc skip. Thus dump recon is set for

   *    all cases except when

   *    1) We are waiting -> ps_codec->i4_pic_cnt > ps_codec->s_cfg.u4_num_bframe

   *        An exception need to be made for the case when we have the last buffer

   *        since we need to flush out the on remainig recon.

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

    ps_video_encode_op->s_ive_op.dump_recon = 0;

    if (ps_codec->s_cfg.u4_enable_recon

                    && (ps_codec->i4_pic_cnt > (WORD32)ps_codec->s_cfg.u4_num_bframes ||

                        s_inp_buf.u4_is_last))

    {

        /* error status */

        IH264_ERROR_T ret = IH264_SUCCESS;

        pic_buf_t *ps_pic_buf = NULL;

        WORD32 i4_buf_status, i4_curr_poc = 32768;

        WORD8 buf_idx = -1;

        /* In case of skips we return recon, but indicate that buffer is zero size */

        if (ps_codec->s_rate_control.post_encode_skip[ctxt_sel]

                        || i4_rc_pre_enc_skip)

        {

            ps_video_encode_op->s_ive_op.dump_recon = 1;

            ps_video_encode_op->s_ive_op.s_recon_buf.au4_wd[0] = 0;

            ps_video_encode_op->s_ive_op.s_recon_buf.au4_wd[1] = 0;

        }

        else

        {

            for (i = 0; i < ps_codec->i4_ref_buf_cnt; i++)

            {

                if (ps_codec->as_ref_set[i].i4_pic_cnt == -1)

                    continue;

                i4_buf_status = ih264_buf_mgr_get_status(

                                ps_codec->pv_ref_buf_mgr,

                                ps_codec->as_ref_set[i].ps_pic_buf->i4_buf_id);

                if ((i4_buf_status & BUF_MGR_IO)

                                && (ps_codec->as_ref_set[i].i4_poc < i4_curr_poc))

                {

                    ps_pic_buf = ps_codec->as_ref_set[i].ps_pic_buf;

                    i4_curr_poc = ps_codec->as_ref_set[i].i4_poc;

                    buf_idx = i;

                }

            }

            if ((ps_codec->s_cfg.u4_enable_quality_metrics & QUALITY_MASK_PSNR)

                                && buf_idx >= 0)

            {

                UWORD8 comp;

                for(comp = 0; comp < 3; comp++)

                {

                    DEBUG("PSNR[%d]: %f\n", comp,

                        ps_codec->as_ref_set[buf_idx].s_pic_quality_stats.total_psnr[comp]);

                }

            }

            ps_video_encode_op->s_ive_op.s_recon_buf =

                            ps_video_encode_ip->s_ive_ip.s_recon_buf;

            /*

             * If we get a valid buffer. output and free recon.

             *

             * we may get an invalid buffer if num_b_frames is 0. This is because

             * We assume that there will be a ref frame in ref list after encoding

             * the last frame. With B frames this is correct since its forward ref

             * pic will be in the ref list. But if num_b_frames is 0, we will not

             * have a forward ref pic

             */

            if (ps_pic_buf)

            {

                /* copy/convert the recon buffer and return */

                ih264e_fmt_conv(ps_codec,

                                ps_pic_buf,

                                ps_video_encode_ip->s_ive_ip.s_recon_buf.apv_bufs[0],

                                ps_video_encode_ip->s_ive_ip.s_recon_buf.apv_bufs[1],

                                ps_video_encode_ip->s_ive_ip.s_recon_buf.apv_bufs[2],

                                ps_video_encode_ip->s_ive_ip.s_recon_buf.au4_wd[0],

                                ps_video_encode_ip->s_ive_ip.s_recon_buf.au4_wd[1],

                                0, ps_codec->s_cfg.u4_disp_ht);

                ps_video_encode_op->s_ive_op.dump_recon = 1;

                ret = ih264_buf_mgr_release(ps_codec->pv_ref_buf_mgr,

                                            ps_pic_buf->i4_buf_id, BUF_MGR_IO);

                if (IH264_SUCCESS != ret)

                {

                    SET_ERROR_ON_RETURN(

                                    (IH264E_ERROR_T)ret, IVE_FATALERROR,

                                    ps_video_encode_op->s_ive_op.u4_error_code,

                                    IV_FAIL);

                }

            }

        }

    }

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

     * Free reference buffers:

     * In case of a post enc skip, we have to ensure that those pics will not

     * be used as reference anymore. In all other cases we will not even mark

     * the ref buffers

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

    if (ps_codec->s_rate_control.post_encode_skip[ctxt_sel])

    {

        /* pic info */

        pic_buf_t *ps_cur_pic;

        /* mv info */

        mv_buf_t *ps_cur_mv_buf;

        /* error status */

        IH264_ERROR_T ret = IH264_SUCCESS;

        /* Decrement coded pic count */

        ps_codec->i4_poc--;

        /* loop through to get the min pic cnt among the list of pics stored in ref list */

        /* since the skipped frame may not be on reference list, we may not have an MV bank

         * hence free only if we have allocated */

        for (i = 0; i < ps_codec->i4_ref_buf_cnt; i++)

        {

            if (ps_codec->i4_pic_cnt == ps_codec->as_ref_set[i].i4_pic_cnt)

            {

                ps_cur_pic = ps_codec->as_ref_set[i].ps_pic_buf;

                ps_cur_mv_buf = ps_codec->as_ref_set[i].ps_mv_buf;

                /* release this frame from reference list and recon list */

                ret = ih264_buf_mgr_release(ps_codec->pv_mv_buf_mgr, ps_cur_mv_buf->i4_buf_id , BUF_MGR_REF);

                ret |= ih264_buf_mgr_release(ps_codec->pv_mv_buf_mgr, ps_cur_mv_buf->i4_buf_id , BUF_MGR_IO);

                SET_ERROR_ON_RETURN((IH264E_ERROR_T)ret,

                                    IVE_FATALERROR,

                                    ps_video_encode_op->s_ive_op.u4_error_code,

                                    IV_FAIL);

                ret = ih264_buf_mgr_release(ps_codec->pv_ref_buf_mgr, ps_cur_pic->i4_buf_id , BUF_MGR_REF);

                ret |= ih264_buf_mgr_release(ps_codec->pv_ref_buf_mgr, ps_cur_pic->i4_buf_id , BUF_MGR_IO);

                SET_ERROR_ON_RETURN((IH264E_ERROR_T)ret,

                                    IVE_FATALERROR,

                                    ps_video_encode_op->s_ive_op.u4_error_code,

                                    IV_FAIL);

                break;

            }

        }

    }

    /*

     * Since recon is not in sync with output, ie there can be frame to be

     * given back as recon even after last output. Hence we need to mark that

     * the output is not the last.

     * Hence search through reflist and mark appropriately

     */

    if (ps_codec->s_cfg.u4_enable_recon)

    {

        WORD32 i4_buf_status = 0;

        for (i = 0; i < ps_codec->i4_ref_buf_cnt; i++)

        {

            if (ps_codec->as_ref_set[i].i4_pic_cnt == -1)

                continue;

            i4_buf_status |= ih264_buf_mgr_get_status(

                            ps_codec->pv_ref_buf_mgr,

                            ps_codec->as_ref_set[i].ps_pic_buf->i4_buf_id);

        }

        if (i4_buf_status & BUF_MGR_IO)

        {

            s_out_buf.u4_is_last = 0;

            ps_video_encode_op->s_ive_op.u4_is_last = 0;

        }

    }

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

     * Signaling to APP

     *  1) If we valid a valid output mark it so

     *  2) Set the codec output ps_video_encode_op

     *  3) Set the error status

     *  4) Set the return Pic type

     *      Note that we already has marked recon properly

     *  5)Send the consumed input back to app so that it can free it if possible

     *

     *  We will have to return the output and input buffers unconditionally

     *  so that app can release them

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

    if (!i4_rc_pre_enc_skip

                    && !ps_codec->s_rate_control.post_encode_skip[ctxt_sel]

                    && s_inp_buf.s_raw_buf.apv_bufs[0])

    {

        /* receive output back from codec */

        s_out_buf = ps_codec->as_out_buf[ctxt_sel];

        /* send the output to app */

        ps_video_encode_op->s_ive_op.output_present  = 1;

        ps_video_encode_op->s_ive_op.u4_error_code = IV_SUCCESS;

        /* Set the time stamps of the encodec input */

        ps_video_encode_op->s_ive_op.u4_timestamp_low = s_inp_buf.u4_timestamp_low;

        ps_video_encode_op->s_ive_op.u4_timestamp_high = s_inp_buf.u4_timestamp_high;

        switch (ps_codec->pic_type)

        {

            case PIC_IDR:

                ps_video_encode_op->s_ive_op.u4_encoded_frame_type =IV_IDR_FRAME;

                break;

            case PIC_I:

                ps_video_encode_op->s_ive_op.u4_encoded_frame_type = IV_I_FRAME;

                break;

            case PIC_P:

                ps_video_encode_op->s_ive_op.u4_encoded_frame_type = IV_P_FRAME;

                break;

            case PIC_B:

                ps_video_encode_op->s_ive_op.u4_encoded_frame_type = IV_B_FRAME;

                break;

            default:

                ps_video_encode_op->s_ive_op.u4_encoded_frame_type = IV_NA_FRAME;

                break;

        }

        for (i = 0; i < (WORD32)ps_codec->s_cfg.u4_num_cores; i++)

        {

            error_status |= ps_codec->as_process[ctxt_sel + i].i4_error_code;

        }

        SET_ERROR_ON_RETURN(error_status,

                            ((error_status == IH264E_BITSTREAM_BUFFER_OVERFLOW) ?

                                            IVE_UNSUPPORTEDPARAM : IVE_FATALERROR),

                            ps_video_encode_op->s_ive_op.u4_error_code, IV_FAIL);

    }

    else

    {

        /* receive output back from codec */

        s_out_buf = ps_codec->as_out_buf[ctxt_sel];

        ps_video_encode_op->s_ive_op.output_present = 0;

        ps_video_encode_op->s_ive_op.u4_error_code = IV_SUCCESS;

        /* Set the time stamps of the encodec input */

        ps_video_encode_op->s_ive_op.u4_timestamp_low = 0;

        ps_video_encode_op->s_ive_op.u4_timestamp_high = 0;

        ps_video_encode_op->s_ive_op.u4_encoded_frame_type =  IV_NA_FRAME;

    }

    ps_video_encode_op->s_ive_op.s_out_buf = s_out_buf.s_bits_buf;

    return IV_SUCCESS;

}