xref: /external/libhevc/decoder/ihevcd_decode.c

/******************************************************************************
*
* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
*
* 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.
*
******************************************************************************/
/**
 *******************************************************************************
 * @file
 *  ihevcd_decode.c
 *
 * @brief
 *  Contains codecs main decode function
 *
 * @author
 *  Harish
 *
 * @par List of Functions:
 * - fill_outargs()
 * - ihevcd_decode
 * @remarks
 *  None
 *
 *******************************************************************************
 */
/*****************************************************************************/
/* File Includes                                                             */
/*****************************************************************************/
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include "ihevc_typedefs.h"
#include "iv.h"
#include "ivd.h"
#include "ihevcd_cxa.h"
#include "ithread.h"

#include "ihevc_defs.h"
#include "ihevc_debug.h"
#include "ihevc_structs.h"
#include "ihevc_macros.h"
#include "ihevc_platform_macros.h"
#include "ihevc_cabac_tables.h"
#include "ihevc_disp_mgr.h"
#include "ihevc_buf_mgr.h"
#include "ihevc_dpb_mgr.h"
#include "ihevc_error.h"

#include "ihevcd_defs.h"
#include "ihevcd_function_selector.h"
#include "ihevcd_structs.h"
#include "ihevcd_error.h"
#include "ihevcd_nal.h"
#include "ihevcd_bitstream.h"
#include "ihevcd_fmt_conv.h"
#include "ihevcd_job_queue.h"
#include "ihevcd_debug.h"
#include "ihevcd_process_slice.h"
#include "ihevcd_ittiam_logo.h"
#include "ihevcd_profile.h"

#define NUM_FRAMES_LIMIT_ENABLED 0

#if NUM_FRAMES_LIMIT_ENABLED
#define NUM_FRAMES_LIMIT 10000
#else
#define NUM_FRAMES_LIMIT 0x7FFFFFFF
#endif

IHEVCD_ERROR_T ihevcd_check_out_buf_size(codec_t *ps_codec);
IHEVCD_ERROR_T ihevcd_fmt_conv(codec_t *ps_codec,
                               process_ctxt_t *ps_proc,
                               UWORD8 *pu1_y_dst,
                               UWORD8 *pu1_u_dst,
                               UWORD8 *pu1_v_dst,
                               WORD32 cur_row,
                               WORD32 num_rows);
WORD32 ihevcd_init(codec_t *ps_codec);

WORD32 ihevcd_allocate_dynamic_bufs(codec_t *ps_codec);
WORD32 ihevcd_free_dynamic_bufs(codec_t *ps_codec);
/*****************************************************************************/
/* Function Prototypes                                                       */
/*****************************************************************************/


/**
 *******************************************************************************
 *
 * @brief Fills output arguments for decode process
 *
 * @par   Description
 * Fills elements in the output structure based on the current state
 *
 * @param[in] ps_codec
 * Codec context
 *
 * @param[in] ps_dec_ip
 * Pointer to input structure
 *
 * @param[in] ps_dec_op
 * Pointer to output structure
 *
 * @returns none
 *
 * @remarks
 *
 *******************************************************************************
 */
static UWORD32 ihevcd_map_error(IHEVCD_ERROR_T e_error)
{
    UWORD32 error_code = 0;
    error_code = e_error;
    switch(error_code)
    {
        case IHEVCD_SUCCESS :
            break;
        case IHEVCD_INIT_NOT_DONE:
        case IHEVCD_LEVEL_UNSUPPORTED:
        case IHEVCD_NUM_REF_UNSUPPORTED:
        case IHEVCD_NUM_REORDER_UNSUPPORTED:
        case IHEVCD_NUM_EXTRA_DISP_UNSUPPORTED:
        case IHEVCD_INSUFFICIENT_MEM_MVBANK:
        case IHEVCD_INSUFFICIENT_MEM_PICBUF:
            error_code |= 1 << IVD_FATALERROR;
            break;
        case IHEVCD_INVALID_DISP_STRD:
        case IHEVCD_CXA_VERS_BUF_INSUFFICIENT:
        case IHEVCD_UNSUPPORTED_VPS_ID:
        case IHEVCD_UNSUPPORTED_SPS_ID:
        case IHEVCD_UNSUPPORTED_PPS_ID:
        case IHEVCD_UNSUPPORTED_CHROMA_FMT_IDC:
        case IHEVCD_UNSUPPORTED_BIT_DEPTH:
        case IHEVCD_BUF_MGR_ERROR:
        case IHEVCD_NO_FREE_MVBANK:
        case IHEVCD_NO_FREE_PICBUF:
        case IHEVCD_SLICE_IN_HEADER_MODE:
        case IHEVCD_END_OF_SEQUENCE:
            break;
        default:
            break;
    }
    return error_code;
}
/**
 *******************************************************************************
 *
 * @brief Fills output arguments for decode process
 *
 * @par   Description
 * Fills elements in the output structure based on the current state
 *
 * @param[in] ps_codec
 * Codec context
 *
 * @param[in] ps_dec_ip
 * Pointer to input structure
 *
 * @param[in] ps_dec_op
 * Pointer to output structure
 *
 * @returns none
 *
 * @remarks
 *
 *******************************************************************************
 */
static void ihevcd_fill_outargs(codec_t *ps_codec,
                                ivd_video_decode_ip_t *ps_dec_ip,
                                ivd_video_decode_op_t *ps_dec_op)
{

    ps_dec_op->u4_error_code = ihevcd_map_error((IHEVCD_ERROR_T)ps_codec->i4_error_code);
    ps_dec_op->u4_num_bytes_consumed = ps_dec_ip->u4_num_Bytes
                    - ps_codec->i4_bytes_remaining;
    if(ps_codec->i4_sps_done)
    {
        ps_dec_op->u4_pic_wd = ps_codec->i4_disp_wd;
        ps_dec_op->u4_pic_ht = ps_codec->i4_disp_ht;
    }
    else
    {
        ps_dec_op->u4_pic_wd = 0;
        ps_dec_op->u4_pic_ht = 0;
    }

    ps_dec_op->e_pic_type = ps_codec->e_dec_pic_type;
    ps_dec_op->u4_frame_decoded_flag = ps_codec->i4_pic_present;
    ps_dec_op->u4_new_seq = 0;

    ps_dec_op->u4_output_present = 0;
    ps_dec_op->u4_progressive_frame_flag = 1;
    if(ps_codec->i4_sps_done)
    {
        sps_t *ps_sps = (ps_codec->s_parse.ps_sps_base + ps_codec->i4_sps_id);
        profile_tier_lvl_info_t *ps_ptl;
        ps_ptl = &ps_sps->s_ptl;
        if((0 == ps_ptl->s_ptl_gen.i1_general_progressive_source_flag) &&
           (1 == ps_ptl->s_ptl_gen.i1_general_interlaced_source_flag))
        {
            ps_dec_op->u4_progressive_frame_flag = 0;
        }
    }

    ps_dec_op->u4_is_ref_flag = 1;
    ps_dec_op->e_output_format = ps_codec->e_chroma_fmt;
    ps_dec_op->u4_is_ref_flag = 1;

    ps_dec_op->e4_fld_type = IV_FLD_TYPE_DEFAULT;

    ps_dec_op->u4_ts = (UWORD32)(-1);
    ps_dec_op->u4_disp_buf_id = ps_codec->i4_disp_buf_id;
    if(ps_codec->i4_flush_mode)
    {
        ps_dec_op->u4_num_bytes_consumed = 0;
        /*In the case of flush ,since no frame is decoded set pic type as invalid*/
        ps_dec_op->u4_is_ref_flag = 0;
        ps_dec_op->e_pic_type = IV_NA_FRAME;
        ps_dec_op->u4_frame_decoded_flag = 0;

    }
    /* If there is a display buffer */
    if(ps_codec->ps_disp_buf)
    {
        pic_buf_t *ps_disp_buf = ps_codec->ps_disp_buf;
        sei_params_t *ps_sei = &ps_disp_buf->s_sei_params;

        if(ps_sei->i1_sei_parameters_present_flag &&
           ps_sei->i1_pic_timing_params_present_flag)
        {
            UWORD32 u4_pic_struct;
            u4_pic_struct = ps_sei->s_pic_timing_sei_params.u4_pic_struct;
            switch(u4_pic_struct)
            {
                case 1:
                    ps_dec_op->e4_fld_type = IV_TOP_FLD;
                    ps_dec_op->u4_progressive_frame_flag = 0;
                    break;
                case 2:
                    ps_dec_op->e4_fld_type = IV_BOT_FLD;
                    ps_dec_op->u4_progressive_frame_flag = 0;
                    break;
                case 0:
                default:
                    ps_dec_op->e4_fld_type = IV_FLD_TYPE_DEFAULT;
                    ps_dec_op->u4_progressive_frame_flag = 1;
                    break;
            }
        }
        ps_dec_op->u4_output_present = 1;
        ps_dec_op->u4_ts = ps_disp_buf->u4_ts;
        if((ps_codec->i4_flush_mode == 0) && (ps_codec->s_parse.i4_end_of_frame == 0))
            ps_dec_op->u4_output_present = 0;
        ps_dec_op->s_disp_frm_buf.u4_y_wd = ps_codec->i4_disp_wd;
        ps_dec_op->s_disp_frm_buf.u4_y_ht = ps_codec->i4_disp_ht;

        if(ps_codec->i4_share_disp_buf)
        {
            ps_dec_op->s_disp_frm_buf.pv_y_buf = ps_disp_buf->pu1_luma;
            if(ps_codec->e_chroma_fmt != IV_YUV_420P)
            {
                ps_dec_op->s_disp_frm_buf.pv_u_buf = ps_disp_buf->pu1_chroma;
                ps_dec_op->s_disp_frm_buf.pv_v_buf = NULL;
            }
            else
            {
                WORD32 i;
                UWORD8 *pu1_u_dst = NULL, *pu1_v_dst = NULL;
                for(i = 0; i < ps_codec->i4_share_disp_buf_cnt; i++)
                {
                    WORD32 diff = ps_disp_buf->pu1_luma - ps_codec->s_disp_buffer[i].pu1_bufs[0];
                    if(diff == (ps_codec->i4_strd * PAD_TOP + PAD_LEFT))
                    {
                        pu1_u_dst = ps_codec->s_disp_buffer[i].pu1_bufs[1];
                        pu1_u_dst += (ps_codec->i4_strd * PAD_TOP) / 4 + (PAD_LEFT / 2);

                        pu1_v_dst = ps_codec->s_disp_buffer[i].pu1_bufs[2];
                        pu1_v_dst += (ps_codec->i4_strd * PAD_TOP) / 4 + (PAD_LEFT / 2);
                        break;
                    }
                }
                ps_dec_op->s_disp_frm_buf.pv_u_buf = pu1_u_dst;
                ps_dec_op->s_disp_frm_buf.pv_v_buf = pu1_v_dst;
            }
            ps_dec_op->s_disp_frm_buf.u4_y_strd = ps_codec->i4_strd;
        }
        else
        {
            ps_dec_op->s_disp_frm_buf.pv_y_buf =
                            ps_dec_ip->s_out_buffer.pu1_bufs[0];
            ps_dec_op->s_disp_frm_buf.pv_u_buf =
                            ps_dec_ip->s_out_buffer.pu1_bufs[1];
            ps_dec_op->s_disp_frm_buf.pv_v_buf =
                            ps_dec_ip->s_out_buffer.pu1_bufs[2];
            ps_dec_op->s_disp_frm_buf.u4_y_strd = ps_codec->i4_disp_strd;
        }

        if((IV_YUV_420SP_VU == ps_codec->e_chroma_fmt)
                        || (IV_YUV_420SP_UV == ps_codec->e_chroma_fmt))
        {
            ps_dec_op->s_disp_frm_buf.u4_u_strd =
                            ps_dec_op->s_disp_frm_buf.u4_y_strd;
            ps_dec_op->s_disp_frm_buf.u4_v_strd = 0;
            ps_dec_op->s_disp_frm_buf.u4_u_wd =
                            ps_dec_op->s_disp_frm_buf.u4_y_wd;
            ps_dec_op->s_disp_frm_buf.u4_v_wd = 0;
            ps_dec_op->s_disp_frm_buf.u4_u_ht =
                            ps_dec_op->s_disp_frm_buf.u4_y_ht / 2;
            ps_dec_op->s_disp_frm_buf.u4_v_ht = 0;
        }
        else if(IV_YUV_420P == ps_codec->e_chroma_fmt)
        {
            ps_dec_op->s_disp_frm_buf.u4_u_strd =
                            ps_dec_op->s_disp_frm_buf.u4_y_strd / 2;
            ps_dec_op->s_disp_frm_buf.u4_v_strd =
                            ps_dec_op->s_disp_frm_buf.u4_y_strd / 2;
            ps_dec_op->s_disp_frm_buf.u4_u_wd =
                            ps_dec_op->s_disp_frm_buf.u4_y_wd / 2;
            ps_dec_op->s_disp_frm_buf.u4_v_wd =
                            ps_dec_op->s_disp_frm_buf.u4_y_wd / 2;
            ps_dec_op->s_disp_frm_buf.u4_u_ht =
                            ps_dec_op->s_disp_frm_buf.u4_y_ht / 2;
            ps_dec_op->s_disp_frm_buf.u4_v_ht =
                            ps_dec_op->s_disp_frm_buf.u4_y_ht / 2;
        }

    }
    else if(ps_codec->i4_flush_mode)
    {
        ps_dec_op->u4_error_code = IHEVCD_END_OF_SEQUENCE;
        /* Come out of flush mode */
        ps_codec->i4_flush_mode = 0;
    }

}

/**
 *******************************************************************************
 *
 * @brief
 *  Codec process call
 *
 * @par Description:
 *  Codec process call  Tests for few error checks  Handle flush and decode
 * header related code  Parse bitstream for start codes  For each NAL unit
 * call decode NAL function  Once a complete frame is decoded (in frame
 * decode mode)  Fill output arguments and return
 *
 * @param[in] ps_codec_obj
 *  Pointer to codec object at API level
 *
 * @param[in] pv_api_ip
 *  Pointer to input argument structure
 *
 * @param[in] pv_api_op
 *  Pointer to output argument structure
 *
 * @returns  Status
 *
 * @remarks
 *
 *
 *******************************************************************************
 */
WORD32 ihevcd_decode(iv_obj_t *ps_codec_obj, void *pv_api_ip, void *pv_api_op)
{
    WORD32 ret = IV_SUCCESS;
    codec_t *ps_codec = (codec_t *)(ps_codec_obj->pv_codec_handle);
    ivd_video_decode_ip_t *ps_dec_ip;
    ivd_video_decode_op_t *ps_dec_op;

    WORD32 proc_idx = 0;
    WORD32 prev_proc_idx = 0;

    /* Initialize error code */
    ps_codec->i4_error_code = 0;

    ps_dec_ip = (ivd_video_decode_ip_t *)pv_api_ip;
    ps_dec_op = (ivd_video_decode_op_t *)pv_api_op;

    {
        UWORD32 u4_size = ps_dec_op->u4_size;
        memset(ps_dec_op, 0, sizeof(ivd_video_decode_op_t));
        ps_dec_op->u4_size = u4_size; //Restore size field
    }
    if(ps_codec->i4_init_done != 1)
    {
        ps_dec_op->u4_error_code |= 1 << IVD_FATALERROR;
        ps_dec_op->u4_error_code |= IHEVCD_INIT_NOT_DONE;
        return IV_FAIL;
    }

    if(ps_codec->u4_pic_cnt >= NUM_FRAMES_LIMIT)
    {
        ps_dec_op->u4_error_code |= 1 << IVD_FATALERROR;
        ps_dec_op->u4_error_code |= IHEVCD_NUM_FRAMES_LIMIT_REACHED;
        return IV_FAIL;
    }

    /* If reset flag is set, flush the existing buffers */
    if(ps_codec->i4_reset_flag)
    {
        ps_codec->i4_flush_mode = 1;
    }

    /*Data memory barries instruction,so that bitstream write by the application is complete*/
    //arm_dsb();
    /* In case the decoder is not in flush mode check for input buffer validity */
    if(0 == ps_codec->i4_flush_mode)
    {
        if(ps_dec_ip->pv_stream_buffer == NULL)
        {
            ps_dec_op->u4_error_code |= 1 << IVD_UNSUPPORTEDPARAM;
            ps_dec_op->u4_error_code |= IVD_DEC_FRM_BS_BUF_NULL;
            return IV_FAIL;
        }
        if(ps_dec_ip->u4_num_Bytes <= MIN_START_CODE_LEN)
        {
            if((WORD32)ps_dec_ip->u4_num_Bytes > 0)
                ps_dec_op->u4_num_bytes_consumed = ps_dec_ip->u4_num_Bytes;
            else
                ps_dec_op->u4_num_bytes_consumed = 0;

            ps_dec_op->u4_error_code |= 1 << IVD_UNSUPPORTEDPARAM;
            ps_dec_op->u4_error_code |= IVD_DEC_NUMBYTES_INV;
            return IV_FAIL;

        }
    }

#ifdef APPLY_CONCEALMENT
    {
        WORD32 num_mbs;

        num_mbs = (ps_codec->i4_wd * ps_codec->i4_ht + 255) >> 8;
        /* Reset MB Count at the beginning of every process call */
        ps_codec->mb_count = 0;
        memset(ps_codec->mb_map, 0, ((num_mbs + 7) >> 3));
    }
#endif

    if(0 == ps_codec->i4_share_disp_buf && ps_codec->i4_header_mode == 0)
    {
        UWORD32 i;
        if(ps_dec_ip->s_out_buffer.u4_num_bufs == 0)
        {
            ps_dec_op->u4_error_code |= 1 << IVD_UNSUPPORTEDPARAM;
            ps_dec_op->u4_error_code |= IVD_DISP_FRM_ZERO_OP_BUFS;
            return IV_FAIL;
        }

        for(i = 0; i < ps_dec_ip->s_out_buffer.u4_num_bufs; i++)
        {
            if(ps_dec_ip->s_out_buffer.pu1_bufs[i] == NULL)
            {
                ps_dec_op->u4_error_code |= 1 << IVD_UNSUPPORTEDPARAM;
                ps_dec_op->u4_error_code |= IVD_DISP_FRM_OP_BUF_NULL;
                return IV_FAIL;
            }

            if(ps_dec_ip->s_out_buffer.u4_min_out_buf_size[i] == 0)
            {
                ps_dec_op->u4_error_code |= 1 << IVD_UNSUPPORTEDPARAM;
                ps_dec_op->u4_error_code |= IVD_DISP_FRM_ZERO_OP_BUF_SIZE;
                return IV_FAIL;
            }
        }
    }

    ps_codec->ps_out_buffer = &ps_dec_ip->s_out_buffer;
    ps_codec->u4_ts = ps_dec_ip->u4_ts;
    if(ps_codec->i4_flush_mode)
    {

        ps_dec_op->u4_pic_wd = ps_codec->i4_disp_wd;
        ps_dec_op->u4_pic_ht = ps_codec->i4_disp_ht;

        ps_dec_op->u4_new_seq = 0;

        ps_codec->ps_disp_buf = (pic_buf_t *)ihevc_disp_mgr_get(
                        (disp_mgr_t *)ps_codec->pv_disp_buf_mgr, &ps_codec->i4_disp_buf_id);
        /* In case of non-shared mode, then convert/copy the frame to output buffer */
        /* Only if the codec is in non-shared mode or in shared mode but needs 420P output */
        if((ps_codec->ps_disp_buf)
                        && ((0 == ps_codec->i4_share_disp_buf)
                                        || (IV_YUV_420P
                                                        == ps_codec->e_chroma_fmt)))
        {

            process_ctxt_t *ps_proc = &ps_codec->as_process[prev_proc_idx];
            if(0 == ps_proc->i4_init_done)
            {
                ihevcd_init_proc_ctxt(ps_proc, 0);
            }

            /* Output buffer check */
            ret = ihevcd_check_out_buf_size(ps_codec);
            RETURN_IF((ret != (IHEVCD_ERROR_T)IHEVCD_SUCCESS), ret);

            /* Set remaining number of rows to be processed */
            ret = ihevcd_fmt_conv(ps_codec, &ps_codec->as_process[prev_proc_idx],
                                  ps_dec_ip->s_out_buffer.pu1_bufs[0],
                                  ps_dec_ip->s_out_buffer.pu1_bufs[1],
                                  ps_dec_ip->s_out_buffer.pu1_bufs[2], 0,
                                  ps_codec->i4_disp_ht);

            ihevc_buf_mgr_release((buf_mgr_t *)ps_codec->pv_pic_buf_mgr,
                                  ps_codec->i4_disp_buf_id, BUF_MGR_DISP);
        }

        ihevcd_fill_outargs(ps_codec, ps_dec_ip, ps_dec_op);

        if(1 == ps_dec_op->u4_output_present)
        {
            WORD32 xpos = ps_codec->i4_disp_wd - 32 - LOGO_WD;
            WORD32 ypos = ps_codec->i4_disp_ht - 32 - LOGO_HT;

            if(ypos < 0)
                ypos = 0;

            if(xpos < 0)
                xpos = 0;

            INSERT_LOGO(ps_dec_ip->s_out_buffer.pu1_bufs[0],
                        ps_dec_ip->s_out_buffer.pu1_bufs[1],
                        ps_dec_ip->s_out_buffer.pu1_bufs[2], ps_codec->i4_disp_strd,
                        xpos,
                        ypos,
                        ps_codec->e_chroma_fmt,
                        ps_codec->i4_disp_wd,
                        ps_codec->i4_disp_ht);
        }


        if(NULL == ps_codec->ps_disp_buf)
        {
            /* If in flush mode and there are no more buffers to flush,
             * check for the reset flag and reset the decoder */
            if(ps_codec->i4_reset_flag)
            {
                ihevcd_init(ps_codec);
            }
            return (IV_FAIL);
        }

        return (IV_SUCCESS);

    }
    /* In case of shared mode, check if there is a free buffer for reconstruction */
    if((0 == ps_codec->i4_header_mode) && (1 == ps_codec->i4_share_disp_buf))
    {
        WORD32 buf_status;
        buf_status = 1;
        if(ps_codec->pv_pic_buf_mgr)
            buf_status = ihevc_buf_mgr_check_free((buf_mgr_t *)ps_codec->pv_pic_buf_mgr);

        /* If there is no free buffer, then return with an error code */
        if(0 == buf_status)
        {
            ps_dec_op->u4_error_code = IVD_DEC_REF_BUF_NULL;
            ps_dec_op->u4_error_code |= (1 << IVD_UNSUPPORTEDPARAM);
            return IV_FAIL;
        }
    }
    ps_codec->i4_bytes_remaining = ps_dec_ip->u4_num_Bytes;
    ps_codec->pu1_inp_bitsbuf = (UWORD8 *)ps_dec_ip->pv_stream_buffer;
    ps_codec->s_parse.i4_end_of_frame = 0;

    ps_codec->i4_pic_present = 0;
    ps_codec->i4_slice_error = 0;
    ps_codec->ps_disp_buf = NULL;

    if(ps_codec->i4_num_cores > 1)
    {
        ithread_set_affinity(0);
    }
    while(MIN_START_CODE_LEN < ps_codec->i4_bytes_remaining)
    {
        WORD32 nal_len;
        WORD32 nal_ofst;
        WORD32 bits_len;

        if(ps_codec->i4_slice_error)
        {
            slice_header_t *ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + (ps_codec->s_parse.i4_cur_slice_idx & (MAX_SLICE_HDR_CNT - 1));
            WORD32 next_slice_addr = ps_slice_hdr_next->i2_ctb_x +
                            ps_slice_hdr_next->i2_ctb_y * ps_codec->s_parse.ps_sps->i2_pic_wd_in_ctb;
            if(ps_codec->s_parse.i4_next_ctb_indx == next_slice_addr)
                ps_codec->i4_slice_error = 0;
        }

        if(ps_codec->pu1_bitsbuf_dynamic)
        {
            ps_codec->pu1_bitsbuf = ps_codec->pu1_bitsbuf_dynamic;
            ps_codec->u4_bitsbuf_size = ps_codec->u4_bitsbuf_size_dynamic;
        }
        else
        {
            ps_codec->pu1_bitsbuf = ps_codec->pu1_bitsbuf_static;
            ps_codec->u4_bitsbuf_size = ps_codec->u4_bitsbuf_size_static;
        }

        nal_ofst = ihevcd_nal_search_start_code(ps_codec->pu1_inp_bitsbuf,
                                                ps_codec->i4_bytes_remaining);

        ps_codec->i4_nal_ofst = nal_ofst;
        {
            WORD32 bytes_remaining = ps_codec->i4_bytes_remaining - nal_ofst;

            bytes_remaining = MIN((UWORD32)bytes_remaining, ps_codec->u4_bitsbuf_size);
            ihevcd_nal_remv_emuln_bytes(ps_codec->pu1_inp_bitsbuf + nal_ofst,
                                        ps_codec->pu1_bitsbuf,
                                        bytes_remaining,
                                        &nal_len, &bits_len);

            /* Decoder may read upto 8 extra bytes at the end of frame */
            /* These are not used, but still set them to zero to avoid uninitialized reads */
            if(bits_len < (WORD32)(ps_codec->u4_bitsbuf_size - 8))
            {
                memset(ps_codec->pu1_bitsbuf + bits_len, 0, 2 * sizeof(UWORD32));
            }
        }
        /* This may be used to update the offsets for tiles and entropy sync row offsets */
        ps_codec->i4_num_emln_bytes = nal_len - bits_len;
        ps_codec->i4_nal_len = nal_len;

        ihevcd_bits_init(&ps_codec->s_parse.s_bitstrm, ps_codec->pu1_bitsbuf,
                         bits_len);

        ret = ihevcd_nal_unit(ps_codec);

        /* If the frame is incomplete and
         * the bytes remaining is zero or a header is received,
         * complete the frame treating it to be in error */
        if(ps_codec->i4_pic_present &&
                        (ps_codec->s_parse.i4_next_ctb_indx != ps_codec->s_parse.ps_sps->i4_pic_size_in_ctb))
        {
            if((ps_codec->i4_bytes_remaining - (nal_len + nal_ofst) <= MIN_START_CODE_LEN) ||
                            (ps_codec->i4_header_in_slice_mode))
            {
                slice_header_t *ps_slice_hdr_next;

                ps_codec->s_parse.i4_cur_slice_idx--;
                if(ps_codec->s_parse.i4_cur_slice_idx < 0)
                    ps_codec->s_parse.i4_cur_slice_idx = 0;

                ps_slice_hdr_next = ps_codec->s_parse.ps_slice_hdr_base + ((ps_codec->s_parse.i4_cur_slice_idx + 1) & (MAX_SLICE_HDR_CNT - 1));
                ps_slice_hdr_next->i2_ctb_x = 0;
                ps_slice_hdr_next->i2_ctb_y = ps_codec->s_parse.ps_sps->i2_pic_ht_in_ctb;
                ps_codec->i4_slice_error = 1;
                continue;
            }
        }

        if(IHEVCD_IGNORE_SLICE == ret)
        {
            ps_codec->s_parse.i4_cur_slice_idx = MAX(0, (ps_codec->s_parse.i4_cur_slice_idx - 1));
            ps_codec->pu1_inp_bitsbuf += (nal_ofst + nal_len);
            ps_codec->i4_bytes_remaining -= (nal_ofst + nal_len);

            continue;
        }

        if((IVD_RES_CHANGED == ret) ||
           (IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED == ret))
        {
            break;
        }

        /* Update bytes remaining and bytes consumed and input bitstream pointer */
        /* Do not consume the NAL in the following cases */
        /* Slice header reached during header decode mode */
        /* TODO: Next picture's slice reached */
        if(ret != IHEVCD_SLICE_IN_HEADER_MODE)
        {
            if((0 == ps_codec->i4_slice_error) ||
                            (ps_codec->i4_bytes_remaining - (nal_len + nal_ofst) <= MIN_START_CODE_LEN))
            {
                ps_codec->pu1_inp_bitsbuf += (nal_ofst + nal_len);
                ps_codec->i4_bytes_remaining -= (nal_ofst + nal_len);
            }
            if(ret != IHEVCD_SUCCESS)
                break;

            if(ps_codec->s_parse.i4_end_of_frame)
                break;
        }
        else
        {
            ret = IHEVCD_SUCCESS;
            break;
        }

        /* Allocate dynamic bitstream buffer once SPS is decoded */
        if((ps_codec->u4_allocate_dynamic_done == 0) && ps_codec->i4_sps_done)
        {
            WORD32 ret;
            ret = ihevcd_allocate_dynamic_bufs(ps_codec);
            if(ret != IV_SUCCESS)
            {
                /* Free any dynamic buffers that are allocated */
                ihevcd_free_dynamic_bufs(ps_codec);
                ps_codec->i4_error_code = IVD_MEM_ALLOC_FAILED;
                ps_dec_op->u4_error_code |= 1 << IVD_FATALERROR;
                ps_dec_op->u4_error_code |= IVD_MEM_ALLOC_FAILED;

                return IV_FAIL;
            }
        }

        BREAK_AFTER_SLICE_NAL();
    }

    if((ps_codec->u4_pic_cnt == 0) && (ret != IHEVCD_SUCCESS))
    {
        ps_codec->i4_error_code = ret;

        ihevcd_fill_outargs(ps_codec, ps_dec_ip, ps_dec_op);
        return IV_FAIL;
    }

    if(1 == ps_codec->i4_pic_present)
    {
        WORD32 i;
        sps_t *ps_sps = ps_codec->s_parse.ps_sps;
        ps_codec->i4_first_pic_done = 1;

        /*TODO temporary fix: end_of_frame is checked before adding format conversion to job queue         */
        if(ps_codec->i4_num_cores > 1 && ps_codec->s_parse.i4_end_of_frame)
        {

            /* Add job queue for format conversion / frame copy for each ctb row */
            /* Only if the codec is in non-shared mode or in shared mode but needs 420P output */
            process_ctxt_t *ps_proc;

            /* i4_num_cores - 1 contexts are currently being used by other threads */
            ps_proc = &ps_codec->as_process[ps_codec->i4_num_cores - 1];

            if((ps_codec->ps_disp_buf) &&
               ((0 == ps_codec->i4_share_disp_buf) || (IV_YUV_420P == ps_codec->e_chroma_fmt)))
            {
                /* If format conversion jobs were not issued in pic_init() add them here */
                if((0 == ps_codec->u4_enable_fmt_conv_ahead) ||
                                (ps_codec->i4_disp_buf_id == ps_proc->i4_cur_pic_buf_id))
                    for(i = 0; i < ps_sps->i2_pic_ht_in_ctb; i++)
                    {
                        proc_job_t s_job;
                        IHEVCD_ERROR_T ret;
                        s_job.i4_cmd = CMD_FMTCONV;
                        s_job.i2_ctb_cnt = 0;
                        s_job.i2_ctb_x = 0;
                        s_job.i2_ctb_y = i;
                        s_job.i2_slice_idx = 0;
                        s_job.i4_tu_coeff_data_ofst = 0;
                        ret = ihevcd_jobq_queue((jobq_t *)ps_codec->s_parse.pv_proc_jobq,
                                                &s_job, sizeof(proc_job_t), 1);
                        if(ret != (IHEVCD_ERROR_T)IHEVCD_SUCCESS)
                            return (WORD32)ret;
                    }
            }
            /* Reached end of frame : Signal terminate */
            /* The terminate flag is checked only after all the jobs are dequeued */
            ret = ihevcd_jobq_terminate((jobq_t *)ps_codec->s_parse.pv_proc_jobq);

            while(1)
            {
                IHEVCD_ERROR_T ret;
                proc_job_t s_job;
                process_ctxt_t *ps_proc;

                /* i4_num_cores - 1 contexts are currently being used by other threads */
                ps_proc = &ps_codec->as_process[ps_codec->i4_num_cores - 1];

                ret = ihevcd_jobq_dequeue((jobq_t *)ps_proc->pv_proc_jobq, &s_job,
                                          sizeof(proc_job_t), 1);
                if((IHEVCD_ERROR_T)IHEVCD_SUCCESS != ret)
                    break;

                ps_proc->i4_ctb_cnt = s_job.i2_ctb_cnt;
                ps_proc->i4_ctb_x = s_job.i2_ctb_x;
                ps_proc->i4_ctb_y = s_job.i2_ctb_y;
                ps_proc->i4_cur_slice_idx = s_job.i2_slice_idx;

                if(CMD_PROCESS == s_job.i4_cmd)
                {
                    ihevcd_init_proc_ctxt(ps_proc, s_job.i4_tu_coeff_data_ofst);

                    ihevcd_process(ps_proc);
                }
                else if(CMD_FMTCONV == s_job.i4_cmd)
                {
                    sps_t *ps_sps = ps_codec->s_parse.ps_sps;
                    WORD32 num_rows = 1 << ps_sps->i1_log2_ctb_size;
                    if(0 == ps_proc->i4_init_done)
                    {
                        ihevcd_init_proc_ctxt(ps_proc, 0);
                    }

                    num_rows = MIN(num_rows, (ps_codec->i4_disp_ht - (s_job.i2_ctb_y << ps_sps->i1_log2_ctb_size)));
                    if(num_rows < 0)
                        num_rows = 0;

                    ihevcd_fmt_conv(ps_codec, ps_proc,
                                    ps_dec_ip->s_out_buffer.pu1_bufs[0],
                                    ps_dec_ip->s_out_buffer.pu1_bufs[1],
                                    ps_dec_ip->s_out_buffer.pu1_bufs[2],
                                    s_job.i2_ctb_y << ps_sps->i1_log2_ctb_size,
                                    num_rows);
                }
            }
        }
        /* In case of non-shared mode and while running in single core mode, then convert/copy the frame to output buffer */
        /* Only if the codec is in non-shared mode or in shared mode but needs 420P output */
        else if((ps_codec->ps_disp_buf) && ((0 == ps_codec->i4_share_disp_buf) ||
                                            (IV_YUV_420P == ps_codec->e_chroma_fmt)) &&
                        (ps_codec->s_parse.i4_end_of_frame))
        {
            process_ctxt_t *ps_proc = &ps_codec->as_process[proc_idx];
            /* Set remaining number of rows to be processed */
            ps_codec->s_fmt_conv.i4_num_rows = ps_codec->i4_disp_ht
                            - ps_codec->s_fmt_conv.i4_cur_row;
            if(0 == ps_proc->i4_init_done)
            {
                ihevcd_init_proc_ctxt(ps_proc, 0);
            }

            if(ps_codec->s_fmt_conv.i4_num_rows < 0)
                ps_codec->s_fmt_conv.i4_num_rows = 0;

            ret = ihevcd_fmt_conv(ps_codec, ps_proc,
                                  ps_dec_ip->s_out_buffer.pu1_bufs[0],
                                  ps_dec_ip->s_out_buffer.pu1_bufs[1],
                                  ps_dec_ip->s_out_buffer.pu1_bufs[2],
                                  ps_codec->s_fmt_conv.i4_cur_row,
                                  ps_codec->s_fmt_conv.i4_num_rows);
            ps_codec->s_fmt_conv.i4_cur_row += ps_codec->s_fmt_conv.i4_num_rows;

        }


        DEBUG_DUMP_MV_MAP(ps_codec);

        /* Mark MV Buf as needed for reference */
        ihevc_buf_mgr_set_status((buf_mgr_t *)ps_codec->pv_mv_buf_mgr,
                                 ps_codec->as_process[proc_idx].i4_cur_mv_bank_buf_id,
                                 BUF_MGR_REF);

        /* Mark pic buf as needed for reference */
        ihevc_buf_mgr_set_status((buf_mgr_t *)ps_codec->pv_pic_buf_mgr,
                                 ps_codec->as_process[proc_idx].i4_cur_pic_buf_id,
                                 BUF_MGR_REF);

        /* Mark pic buf as needed for display */
        ihevc_buf_mgr_set_status((buf_mgr_t *)ps_codec->pv_pic_buf_mgr,
                                 ps_codec->as_process[proc_idx].i4_cur_pic_buf_id,
                                 BUF_MGR_DISP);

        /* Insert the current picture as short term reference */
        ihevc_dpb_mgr_insert_ref((dpb_mgr_t *)ps_codec->pv_dpb_mgr,
                                 ps_codec->as_process[proc_idx].ps_cur_pic,
                                 ps_codec->as_process[proc_idx].i4_cur_pic_buf_id);

        /* If a frame was displayed (in non-shared mode), then release it from display manager */
        if((0 == ps_codec->i4_share_disp_buf) && (ps_codec->ps_disp_buf))
            ihevc_buf_mgr_release((buf_mgr_t *)ps_codec->pv_pic_buf_mgr,
                                  ps_codec->i4_disp_buf_id, BUF_MGR_DISP);

        /* Wait for threads */
        for(i = 0; i < (ps_codec->i4_num_cores - 1); i++)
        {
            if(ps_codec->ai4_process_thread_created[i])
            {
                ithread_join(ps_codec->apv_process_thread_handle[i], NULL);
                ps_codec->ai4_process_thread_created[i] = 0;
            }
        }

        DEBUG_VALIDATE_PADDED_REGION(&ps_codec->as_process[proc_idx]);
        if(ps_codec->u4_pic_cnt > 0)
        {
            DEBUG_DUMP_PIC_PU(ps_codec);
        }
        DEBUG_DUMP_PIC_BUFFERS(ps_codec);

        /* Increment the number of pictures decoded */
        ps_codec->u4_pic_cnt++;
    }
    ihevcd_fill_outargs(ps_codec, ps_dec_ip, ps_dec_op);

    if(1 == ps_dec_op->u4_output_present)
    {
        WORD32 xpos = ps_codec->i4_disp_wd - 32 - LOGO_WD;
        WORD32 ypos = ps_codec->i4_disp_ht - 32 - LOGO_HT;

        if(ypos < 0)
            ypos = 0;

        if(xpos < 0)
            xpos = 0;

        INSERT_LOGO(ps_dec_ip->s_out_buffer.pu1_bufs[0],
                    ps_dec_ip->s_out_buffer.pu1_bufs[1],
                    ps_dec_ip->s_out_buffer.pu1_bufs[2], ps_codec->i4_disp_strd,
                    xpos,
                    ypos,
                    ps_codec->e_chroma_fmt,
                    ps_codec->i4_disp_wd,
                    ps_codec->i4_disp_ht);
    }


    return ret;
}