/src/libmpeg2/decoder/impeg2d_i_pic.c

Source
/******************************************************************************
 *
 * 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
*/

#include "iv_datatypedef.h"
#include "iv.h"

#include "impeg2_buf_mgr.h"
#include "impeg2_disp_mgr.h"
#include "impeg2_defs.h"
#include "impeg2_platform_macros.h"
#include "impeg2_inter_pred.h"
#include "impeg2_idct.h"
#include "impeg2_globals.h"
#include "impeg2_format_conv.h"
#include "impeg2_macros.h"

#include "ivd.h"
#include "impeg2d.h"
#include "impeg2d_bitstream.h"
#include "impeg2d_structs.h"
#include "impeg2d_vld_tables.h"
#include "impeg2d_vld.h"
#include "impeg2d_pic_proc.h"
#include "impeg2d_debug.h"
#include "impeg2d_globals.h"
#include "impeg2d_mv_dec.h"

/*******************************************************************************
*  Function Name   : impeg2d_dec_i_mb_params
*
*  Description     : Decoding I MB parameters.
*
*  Arguments       :
*  dec             : Decoder state
*  stream          : Bitstream
*
*  Values Returned : None
*******************************************************************************/
void impeg2d_dec_i_mb_params(dec_state_t *ps_dec)
{

    UWORD16 u2_next_bits;
    UWORD16 u2_bits_to_flush;
    stream_t *ps_stream = &ps_dec->s_bit_stream;

    /*-----------------------------------------------------------------------*/
    /* Flush the MBAddrIncr Bit                                              */
    /*                                                                       */
    /* Since we are not supporting scalable modes there won't be skipped     */
    /* macroblocks in I-Picture and the MBAddrIncr will always be 1,         */
    /* The MBAddrIncr can never be greater than 1 for the simple and main    */
    /* profile MPEG2.                                                        */
    /*-----------------------------------------------------------------------*/
    if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) //Making sure the increment is one.
    {
        impeg2d_bit_stream_flush(ps_stream,1);
    }
    else if(ps_dec->u2_first_mb && ps_dec->u2_mb_x)
    {
        WORD32 i4_mb_add_inc = impeg2d_get_mb_addr_incr(ps_stream);

            //VOLParams->FirstInSlice = 0;
            /****************************************************************/
            /* Section 6.3.17                                               */
            /* The first MB of a slice cannot be skipped                    */
            /* But the mb_addr_incr can be > 1, because at the beginning of */
            /* a slice, it indicates the offset from the last MB in the     */
            /* previous row. Hence for the first slice in a row, the        */
            /* mb_addr_incr needs to be 1.                                  */
            /****************************************************************/
            /* MB_x is set to zero whenever MB_y changes.                   */

            ps_dec->u2_mb_x = i4_mb_add_inc - 1;
            ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
    }

    /*-----------------------------------------------------------------------*/
    /* Decode the macroblock_type, dct_type and quantiser_scale_code         */
    /*                                                                       */
    /* macroblock_type      2 bits [can be either 1 or 01]                   */
    /* dct_type             1 bit                                            */
    /* quantiser_scale_code 5 bits                                           */
    /*-----------------------------------------------------------------------*/
    u2_next_bits = impeg2d_bit_stream_nxt(ps_stream,8);
    if(BIT(u2_next_bits,7) == 1)
    {
        /* read the dct_type if needed */
        u2_bits_to_flush = 1;
        if(ps_dec->u2_read_dct_type)
        {
            u2_bits_to_flush++;
            ps_dec->u2_field_dct = BIT(u2_next_bits,6);
        }
    }
    else
    {
        u2_bits_to_flush = 7;
        /*------------------------------------------------------------------*/
        /* read the dct_type if needed                                      */
        /*------------------------------------------------------------------*/
        if(ps_dec->u2_read_dct_type)
        {
            u2_bits_to_flush++;
            ps_dec->u2_field_dct = BIT(u2_next_bits,5);
        }
        else
        {
            u2_next_bits >>= 1;
        }
        /*------------------------------------------------------------------*/
        /* Quant scale code decoding                                        */
        /*------------------------------------------------------------------*/
        {
            UWORD16 quant_scale_code;
            quant_scale_code = u2_next_bits & 0x1F;

            ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
                gau1_impeg2_non_linear_quant_scale[quant_scale_code] :
                (quant_scale_code << 1);
        }
    }
    impeg2d_bit_stream_flush(ps_stream,u2_bits_to_flush);
    /*************************************************************************/
    /* Decoding of motion vectors if concealment motion vectors are present  */
    /*************************************************************************/
    if(ps_dec->u2_concealment_motion_vectors)
    {
        if(ps_dec->u2_picture_structure != FRAME_PICTURE)
            impeg2d_bit_stream_flush(ps_stream,1);
        impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],ps_dec->ai2_mv[FORW][FIRST],
            ps_dec->au2_f_code[FORW],0,0);

        /* Flush the marker bit */
        if(0 == (impeg2d_bit_stream_get(ps_stream,1)))
        {
            /* Ignore marker bit error */
        }

    }
    ps_dec->u2_first_mb = 0;
    return;
}
/*******************************************************************************
*  Function Name   : impeg2d_dec_i_slice
*
*  Description     : Decodes I slice
*
*  Arguments       :
*  dec             : Decoder state
*
*  Values Returned : None
*******************************************************************************/
IMPEG2D_ERROR_CODES_T impeg2d_dec_i_slice(dec_state_t *ps_dec)
{
    WORD16 *pi2_vld_out;
    UWORD32 i;
    yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;

    UWORD32 u4_frame_width = ps_dec->u2_frame_width;
    UWORD32 u4_frm_offset = 0;
    UWORD8  *pu1_out_p;
    IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;


    pi2_vld_out = ps_dec->ai2_vld_buf;


    if(ps_dec->u2_picture_structure != FRAME_PICTURE)
    {
        u4_frame_width <<= 1;
        if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
        {
            u4_frm_offset = ps_dec->u2_frame_width;
        }
    }

    do
    {
        UWORD32 u4_x_offset,u4_y_offset;
        UWORD32 u4_blk_pos;
        UWORD32 u4_x_dst_offset = 0;
        UWORD32 u4_y_dst_offset = 0;


        IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);

        impeg2d_dec_i_mb_params(ps_dec);

        u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
        u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * u4_frame_width;
        pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;

        for(i = 0; i < NUM_LUMA_BLKS; ++i)
        {

            e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
                                            ps_dec->pu1_inv_scan_matrix, 1, Y_LUMA, 0);
            if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
            {
                return e_error;
            }

            u4_x_offset = gai2_impeg2_blk_x_off[i];

            if(ps_dec->u2_field_dct == 0)
                u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
            else
                u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;

            u4_blk_pos = u4_y_offset * u4_frame_width + u4_x_offset;
            IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);

            PROFILE_DISABLE_IDCT_IF0
            {
                WORD32 i4_idx;
                i4_idx = 1;
                if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
                    i4_idx = 0;

                ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
                                                        ps_dec->ai2_idct_stg1,
                                                        (UWORD8 *)gau1_impeg2_zerobuf,
                                                        pu1_out_p + u4_blk_pos,
                                                        8,
                                                        8,
                                                        u4_frame_width << ps_dec->u2_field_dct,
                                                        ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);

            }

        }

        /* For U and V blocks, divide the x and y offsets by 2. */
        u4_x_dst_offset >>= 1;
        u4_y_dst_offset >>= 2;

        /* In case of chrominance blocks the DCT will be frame DCT */
        /* i = 0, U component and */

        e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
                                        ps_dec->pu1_inv_scan_matrix, 1, U_CHROMA, 0);
        if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
        {
            return e_error;
        }

        pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
        IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
        PROFILE_DISABLE_IDCT_IF0
        {
            WORD32 i4_idx;
            i4_idx = 1;
            if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
                i4_idx = 0;

            ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
                                                    ps_dec->ai2_idct_stg1,
                                                    (UWORD8 *)gau1_impeg2_zerobuf,
                                                    pu1_out_p,
                                                    8,
                                                    8,
                                                    u4_frame_width >> 1,
                                                    ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);

        }
        /* Write the idct_out block to the current frame dec->curFrame*/
        /* In case of field DCT type, write to alternate lines */
        e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
                                        ps_dec->pu1_inv_scan_matrix, 1, V_CHROMA, 0);
        if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
        {
            return e_error;
        }

        pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
        IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
        PROFILE_DISABLE_IDCT_IF0
        {
            WORD32 i4_idx;
            i4_idx = 1;
            if(1 == (ps_dec->u4_non_zero_cols | ps_dec->u4_non_zero_rows))
                i4_idx = 0;
            ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
                                                    ps_dec->ai2_idct_stg1,
                                                    (UWORD8 *)gau1_impeg2_zerobuf,
                                                    pu1_out_p,
                                                    8,
                                                    8,
                                                    u4_frame_width >> 1,
                                                    ~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
        }
        ps_dec->u2_num_mbs_left--;


        ps_dec->u2_mb_x++;

        if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
        {
            return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
        }
        else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
        {
            ps_dec->u2_mb_x = 0;
            ps_dec->u2_mb_y++;
        }

    }
    while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
    return e_error;
}

Coverage Report

Created: 2026-09-14 07:05

Line	Count	Source
1		/******************************************************************************
2		*
3		* Copyright (C) 2015 The Android Open Source Project
4		*
5		* Licensed under the Apache License, Version 2.0 (the "License");
6		* you may not use this file except in compliance with the License.
7		* You may obtain a copy of the License at:
8		*
9		* http://www.apache.org/licenses/LICENSE-2.0
10		*
11		* Unless required by applicable law or agreed to in writing, software
12		* distributed under the License is distributed on an "AS IS" BASIS,
13		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14		* See the License for the specific language governing permissions and
15		* limitations under the License.
16		*
17		*****************************************************************************
18		* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19		*/
20
21		#include "iv_datatypedef.h"
22		#include "iv.h"
23
24		#include "impeg2_buf_mgr.h"
25		#include "impeg2_disp_mgr.h"
26		#include "impeg2_defs.h"
27		#include "impeg2_platform_macros.h"
28		#include "impeg2_inter_pred.h"
29		#include "impeg2_idct.h"
30		#include "impeg2_globals.h"
31		#include "impeg2_format_conv.h"
32		#include "impeg2_macros.h"
33
34		#include "ivd.h"
35		#include "impeg2d.h"
36		#include "impeg2d_bitstream.h"
37		#include "impeg2d_structs.h"
38		#include "impeg2d_vld_tables.h"
39		#include "impeg2d_vld.h"
40		#include "impeg2d_pic_proc.h"
41		#include "impeg2d_debug.h"
42		#include "impeg2d_globals.h"
43		#include "impeg2d_mv_dec.h"
44
45		/*******************************************************************************
46		* Function Name : impeg2d_dec_i_mb_params
47		*
48		* Description : Decoding I MB parameters.
49		*
50		* Arguments :
51		* dec : Decoder state
52		* stream : Bitstream
53		*
54		* Values Returned : None
55		*******************************************************************************/
56		void impeg2d_dec_i_mb_params(dec_state_t *ps_dec)
57	377k	{
58
59	377k	UWORD16 u2_next_bits;
60	377k	UWORD16 u2_bits_to_flush;
61	377k	stream_t *ps_stream = &ps_dec->s_bit_stream;
62
63		/-----------------------------------------------------------------------/
64		/* Flush the MBAddrIncr Bit */
65		/* */
66		/* Since we are not supporting scalable modes there won't be skipped */
67		/* macroblocks in I-Picture and the MBAddrIncr will always be 1, */
68		/* The MBAddrIncr can never be greater than 1 for the simple and main */
69		/* profile MPEG2. */
70		/-----------------------------------------------------------------------/
71	377k	if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) //Making sure the increment is one.
72	296k	{
73	296k	impeg2d_bit_stream_flush(ps_stream,1);
74	296k	}
75	80.5k	else if(ps_dec->u2_first_mb && ps_dec->u2_mb_x)
76	1.14k	{
77	1.14k	WORD32 i4_mb_add_inc = impeg2d_get_mb_addr_incr(ps_stream);
78
79		//VOLParams->FirstInSlice = 0;
80		/****************************************************************/
81		/* Section 6.3.17 */
82		/* The first MB of a slice cannot be skipped */
83		/* But the mb_addr_incr can be > 1, because at the beginning of */
84		/* a slice, it indicates the offset from the last MB in the */
85		/* previous row. Hence for the first slice in a row, the */
86		/* mb_addr_incr needs to be 1. */
87		/****************************************************************/
88		/* MB_x is set to zero whenever MB_y changes. */
89
90	1.14k	ps_dec->u2_mb_x = i4_mb_add_inc - 1;
91	1.14k	ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
92	1.14k	}
93
94		/-----------------------------------------------------------------------/
95		/* Decode the macroblock_type, dct_type and quantiser_scale_code */
96		/* */
97		/* macroblock_type 2 bits [can be either 1 or 01] */
98		/* dct_type 1 bit */
99		/* quantiser_scale_code 5 bits */
100		/-----------------------------------------------------------------------/
101	377k	u2_next_bits = impeg2d_bit_stream_nxt(ps_stream,8);
102	377k	if(BIT(u2_next_bits,7) == 1)
103	217k	{
104		/* read the dct_type if needed */
105	217k	u2_bits_to_flush = 1;
106	217k	if(ps_dec->u2_read_dct_type)
107	2.64k	{
108	2.64k	u2_bits_to_flush++;
109	2.64k	ps_dec->u2_field_dct = BIT(u2_next_bits,6);
110	2.64k	}
111	217k	}
112	160k	else
113	160k	{
114	160k	u2_bits_to_flush = 7;
115		/------------------------------------------------------------------/
116		/* read the dct_type if needed */
117		/------------------------------------------------------------------/
118	160k	if(ps_dec->u2_read_dct_type)
119	990	{
120	990	u2_bits_to_flush++;
121	990	ps_dec->u2_field_dct = BIT(u2_next_bits,5);
122	990	}
123	159k	else
124	159k	{
125	159k	u2_next_bits >>= 1;
126	159k	}
127		/------------------------------------------------------------------/
128		/* Quant scale code decoding */
129		/------------------------------------------------------------------/
130	160k	{
131	160k	UWORD16 quant_scale_code;
132	160k	quant_scale_code = u2_next_bits & 0x1F;
133
134	160k	ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
135	109k	gau1_impeg2_non_linear_quant_scale[quant_scale_code] :
136	160k	(quant_scale_code << 1);
137	160k	}
138	160k	}
139	377k	impeg2d_bit_stream_flush(ps_stream,u2_bits_to_flush);
140		/*************************************************************************/
141		/* Decoding of motion vectors if concealment motion vectors are present */
142		/*************************************************************************/
143	377k	if(ps_dec->u2_concealment_motion_vectors)
144	115k	{
145	115k	if(ps_dec->u2_picture_structure != FRAME_PICTURE)
146	114k	impeg2d_bit_stream_flush(ps_stream,1);
147	115k	impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],ps_dec->ai2_mv[FORW][FIRST],
148	115k	ps_dec->au2_f_code[FORW],0,0);
149
150		/* Flush the marker bit */
151	115k	if(0 == (impeg2d_bit_stream_get(ps_stream,1)))
152	33.3k	{
153		/* Ignore marker bit error */
154	33.3k	}
155
156	115k	}
157	377k	ps_dec->u2_first_mb = 0;
158	377k	return;
159	377k	}
160		/*******************************************************************************
161		* Function Name : impeg2d_dec_i_slice
162		*
163		* Description : Decodes I slice
164		*
165		* Arguments :
166		* dec : Decoder state
167		*
168		* Values Returned : None
169		*******************************************************************************/
170		IMPEG2D_ERROR_CODES_T impeg2d_dec_i_slice(dec_state_t *ps_dec)
171	10.4k	{
172	10.4k	WORD16 *pi2_vld_out;
173	10.4k	UWORD32 i;
174	10.4k	yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;
175
176	10.4k	UWORD32 u4_frame_width = ps_dec->u2_frame_width;
177	10.4k	UWORD32 u4_frm_offset = 0;
178	10.4k	UWORD8 *pu1_out_p;
179	10.4k	IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
180
181
182	10.4k	pi2_vld_out = ps_dec->ai2_vld_buf;
183
184
185	10.4k	if(ps_dec->u2_picture_structure != FRAME_PICTURE)
186	3.96k	{
187	3.96k	u4_frame_width <<= 1;
188	3.96k	if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
189	365	{
190	365	u4_frm_offset = ps_dec->u2_frame_width;
191	365	}
192	3.96k	}
193
194	10.4k	do
195	377k	{
196	377k	UWORD32 u4_x_offset,u4_y_offset;
197	377k	UWORD32 u4_blk_pos;
198	377k	UWORD32 u4_x_dst_offset = 0;
199	377k	UWORD32 u4_y_dst_offset = 0;
200
201
202	377k	IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
203
204	377k	impeg2d_dec_i_mb_params(ps_dec);
205
206	377k	u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
207	377k	u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * u4_frame_width;
208	377k	pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;
209
210	1.85M	for(i = 0; i < NUM_LUMA_BLKS; ++i)
211	1.48M	{
212
213	1.48M	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
214	1.48M	ps_dec->pu1_inv_scan_matrix, 1, Y_LUMA, 0);
215	1.48M	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
216	3.74k	{
217	3.74k	return e_error;
218	3.74k	}
219
220	1.47M	u4_x_offset = gai2_impeg2_blk_x_off[i];
221
222	1.47M	if(ps_dec->u2_field_dct == 0)
223	1.48M	u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
224	18.4E	else
225	18.4E	u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;
226
227	1.47M	u4_blk_pos = u4_y_offset * u4_frame_width + u4_x_offset;
228	1.47M	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
229
230	1.47M	PROFILE_DISABLE_IDCT_IF0
231	1.47M	{
232	1.47M	WORD32 i4_idx;
233	1.47M	i4_idx = 1;
234	1.47M	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
235	437k	i4_idx = 0;
236
237	1.47M	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
238	1.47M	ps_dec->ai2_idct_stg1,
239	1.47M	(UWORD8 *)gau1_impeg2_zerobuf,
240	1.47M	pu1_out_p + u4_blk_pos,
241	1.47M	8,
242	1.47M	8,
243	1.47M	u4_frame_width << ps_dec->u2_field_dct,
244	1.47M	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
245
246	1.47M	}
247
248	1.47M	}
249
250		/* For U and V blocks, divide the x and y offsets by 2. */
251	373k	u4_x_dst_offset >>= 1;
252	373k	u4_y_dst_offset >>= 2;
253
254		/* In case of chrominance blocks the DCT will be frame DCT */
255		/* i = 0, U component and */
256
257	373k	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
258	373k	ps_dec->pu1_inv_scan_matrix, 1, U_CHROMA, 0);
259	373k	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
260	1.13k	{
261	1.13k	return e_error;
262	1.13k	}
263
264	372k	pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
265	372k	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
266	372k	PROFILE_DISABLE_IDCT_IF0
267	372k	{
268	372k	WORD32 i4_idx;
269	372k	i4_idx = 1;
270	372k	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
271	238k	i4_idx = 0;
272
273	372k	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
274	372k	ps_dec->ai2_idct_stg1,
275	372k	(UWORD8 *)gau1_impeg2_zerobuf,
276	372k	pu1_out_p,
277	372k	8,
278	372k	8,
279	372k	u4_frame_width >> 1,
280	372k	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
281
282	372k	}
283		/* Write the idct_out block to the current frame dec->curFrame*/
284		/* In case of field DCT type, write to alternate lines */
285	372k	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
286	372k	ps_dec->pu1_inv_scan_matrix, 1, V_CHROMA, 0);
287	372k	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
288	908	{
289	908	return e_error;
290	908	}
291
292	371k	pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
293	371k	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
294	371k	PROFILE_DISABLE_IDCT_IF0
295	371k	{
296	371k	WORD32 i4_idx;
297	371k	i4_idx = 1;
298	371k	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
299	241k	i4_idx = 0;
300	371k	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
301	371k	ps_dec->ai2_idct_stg1,
302	371k	(UWORD8 *)gau1_impeg2_zerobuf,
303	371k	pu1_out_p,
304	371k	8,
305	371k	8,
306	371k	u4_frame_width >> 1,
307	371k	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
308	371k	}
309	371k	ps_dec->u2_num_mbs_left--;
310
311
312	371k	ps_dec->u2_mb_x++;
313
314	371k	if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
315	1.11k	{
316	1.11k	return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
317	1.11k	}
318	370k	else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
319	10.0k	{
320	10.0k	ps_dec->u2_mb_x = 0;
321	10.0k	ps_dec->u2_mb_y++;
322	10.0k	}
323
324	371k	}
325	370k	while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
326	3.53k	return e_error;
327	10.4k	}