/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_mem_func.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: 2025-08-29 06:21

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_mem_func.h"
32		#include "impeg2_format_conv.h"
33		#include "impeg2_macros.h"
34
35		#include "ivd.h"
36		#include "impeg2d.h"
37		#include "impeg2d_bitstream.h"
38		#include "impeg2d_structs.h"
39		#include "impeg2d_vld_tables.h"
40		#include "impeg2d_vld.h"
41		#include "impeg2d_pic_proc.h"
42		#include "impeg2d_debug.h"
43		#include "impeg2d_globals.h"
44		#include "impeg2d_mv_dec.h"
45
46		/*******************************************************************************
47		* Function Name : impeg2d_dec_i_mb_params
48		*
49		* Description : Decoding I MB parameters.
50		*
51		* Arguments :
52		* dec : Decoder state
53		* stream : Bitstream
54		*
55		* Values Returned : None
56		*******************************************************************************/
57		void impeg2d_dec_i_mb_params(dec_state_t *ps_dec)
58	322k	{
59
60	322k	UWORD16 u2_next_bits;
61	322k	UWORD16 u2_bits_to_flush;
62	322k	stream_t *ps_stream = &ps_dec->s_bit_stream;
63
64		/-----------------------------------------------------------------------/
65		/* Flush the MBAddrIncr Bit */
66		/* */
67		/* Since we are not supporting scalable modes there won't be skipped */
68		/* macroblocks in I-Picture and the MBAddrIncr will always be 1, */
69		/* The MBAddrIncr can never be greater than 1 for the simple and main */
70		/* profile MPEG2. */
71		/-----------------------------------------------------------------------/
72	322k	if(impeg2d_bit_stream_nxt(ps_stream,1) == 1) //Making sure the increment is one.
73	299k	{
74	299k	impeg2d_bit_stream_flush(ps_stream,1);
75	299k	}
76	23.4k	else if(ps_dec->u2_first_mb && ps_dec->u2_mb_x)
77	1.06k	{
78	1.06k	WORD32 i4_mb_add_inc = impeg2d_get_mb_addr_incr(ps_stream);
79
80		//VOLParams->FirstInSlice = 0;
81		/****************************************************************/
82		/* Section 6.3.17 */
83		/* The first MB of a slice cannot be skipped */
84		/* But the mb_addr_incr can be > 1, because at the beginning of */
85		/* a slice, it indicates the offset from the last MB in the */
86		/* previous row. Hence for the first slice in a row, the */
87		/* mb_addr_incr needs to be 1. */
88		/****************************************************************/
89		/* MB_x is set to zero whenever MB_y changes. */
90
91	1.06k	ps_dec->u2_mb_x = i4_mb_add_inc - 1;
92	1.06k	ps_dec->u2_mb_x = MIN(ps_dec->u2_mb_x, (ps_dec->u2_num_horiz_mb - 1));
93	1.06k	}
94
95		/-----------------------------------------------------------------------/
96		/* Decode the macroblock_type, dct_type and quantiser_scale_code */
97		/* */
98		/* macroblock_type 2 bits [can be either 1 or 01] */
99		/* dct_type 1 bit */
100		/* quantiser_scale_code 5 bits */
101		/-----------------------------------------------------------------------/
102	322k	u2_next_bits = impeg2d_bit_stream_nxt(ps_stream,8);
103	322k	if(BIT(u2_next_bits,7) == 1)
104	251k	{
105		/* read the dct_type if needed */
106	251k	u2_bits_to_flush = 1;
107	251k	if(ps_dec->u2_read_dct_type)
108	2.10k	{
109	2.10k	u2_bits_to_flush++;
110	2.10k	ps_dec->u2_field_dct = BIT(u2_next_bits,6);
111	2.10k	}
112	251k	}
113	71.1k	else
114	71.1k	{
115	71.1k	u2_bits_to_flush = 7;
116		/------------------------------------------------------------------/
117		/* read the dct_type if needed */
118		/------------------------------------------------------------------/
119	71.1k	if(ps_dec->u2_read_dct_type)
120	977	{
121	977	u2_bits_to_flush++;
122	977	ps_dec->u2_field_dct = BIT(u2_next_bits,5);
123	977	}
124	70.1k	else
125	70.1k	{
126	70.1k	u2_next_bits >>= 1;
127	70.1k	}
128		/------------------------------------------------------------------/
129		/* Quant scale code decoding */
130		/------------------------------------------------------------------/
131	71.1k	{
132	71.1k	UWORD16 quant_scale_code;
133	71.1k	quant_scale_code = u2_next_bits & 0x1F;
134
135	71.1k	ps_dec->u1_quant_scale = (ps_dec->u2_q_scale_type) ?
136	21.2k	gau1_impeg2_non_linear_quant_scale[quant_scale_code] :
137	71.1k	(quant_scale_code << 1);
138	71.1k	}
139	71.1k	}
140	322k	impeg2d_bit_stream_flush(ps_stream,u2_bits_to_flush);
141		/*************************************************************************/
142		/* Decoding of motion vectors if concealment motion vectors are present */
143		/*************************************************************************/
144	322k	if(ps_dec->u2_concealment_motion_vectors)
145	26.2k	{
146	26.2k	if(ps_dec->u2_picture_structure != FRAME_PICTURE)
147	24.2k	impeg2d_bit_stream_flush(ps_stream,1);
148	26.2k	impeg2d_dec_mv(ps_stream,ps_dec->ai2_pred_mv[FORW][FIRST],ps_dec->ai2_mv[FORW][FIRST],
149	26.2k	ps_dec->au2_f_code[FORW],0,0);
150
151		/* Flush the marker bit */
152	26.2k	if(0 == (impeg2d_bit_stream_get(ps_stream,1)))
153	12.1k	{
154		/* Ignore marker bit error */
155	12.1k	}
156
157	26.2k	}
158	322k	ps_dec->u2_first_mb = 0;
159	322k	return;
160	322k	}
161		/*******************************************************************************
162		* Function Name : impeg2d_dec_i_slice
163		*
164		* Description : Decodes I slice
165		*
166		* Arguments :
167		* dec : Decoder state
168		*
169		* Values Returned : None
170		*******************************************************************************/
171		IMPEG2D_ERROR_CODES_T impeg2d_dec_i_slice(dec_state_t *ps_dec)
172	9.04k	{
173	9.04k	WORD16 *pi2_vld_out;
174	9.04k	UWORD32 i;
175	9.04k	yuv_buf_t *ps_cur_frm_buf = &ps_dec->s_cur_frm_buf;
176
177	9.04k	UWORD32 u4_frame_width = ps_dec->u2_frame_width;
178	9.04k	UWORD32 u4_frm_offset = 0;
179	9.04k	UWORD8 *pu1_out_p;
180	9.04k	IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE;
181
182
183	9.04k	pi2_vld_out = ps_dec->ai2_vld_buf;
184
185
186	9.04k	if(ps_dec->u2_picture_structure != FRAME_PICTURE)
187	3.04k	{
188	3.04k	u4_frame_width <<= 1;
189	3.04k	if(ps_dec->u2_picture_structure == BOTTOM_FIELD)
190	262	{
191	262	u4_frm_offset = ps_dec->u2_frame_width;
192	262	}
193	3.04k	}
194
195	9.04k	do
196	322k	{
197	322k	UWORD32 u4_x_offset,u4_y_offset;
198	322k	UWORD32 u4_blk_pos;
199	322k	UWORD32 u4_x_dst_offset = 0;
200	322k	UWORD32 u4_y_dst_offset = 0;
201
202
203	322k	IMPEG2D_TRACE_MB_START(ps_dec->u2_mb_x, ps_dec->u2_mb_y);
204
205	322k	impeg2d_dec_i_mb_params(ps_dec);
206
207	322k	u4_x_dst_offset = u4_frm_offset + (ps_dec->u2_mb_x << 4);
208	322k	u4_y_dst_offset = (ps_dec->u2_mb_y << 4) * u4_frame_width;
209	322k	pu1_out_p = ps_cur_frm_buf->pu1_y + u4_x_dst_offset + u4_y_dst_offset;
210
211	1.59M	for(i = 0; i < NUM_LUMA_BLKS; ++i)
212	1.27M	{
213
214	1.27M	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
215	1.27M	ps_dec->pu1_inv_scan_matrix, 1, Y_LUMA, 0);
216	1.27M	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
217	3.52k	{
218	3.52k	return e_error;
219	3.52k	}
220
221	1.26M	u4_x_offset = gai2_impeg2_blk_x_off[i];
222
223	1.26M	if(ps_dec->u2_field_dct == 0)
224	1.27M	u4_y_offset = gai2_impeg2_blk_y_off_frm[i] ;
225	18.4E	else
226	18.4E	u4_y_offset = gai2_impeg2_blk_y_off_fld[i] ;
227
228	1.26M	u4_blk_pos = u4_y_offset * u4_frame_width + u4_x_offset;
229	1.26M	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
230
231	1.26M	PROFILE_DISABLE_IDCT_IF0
232	1.26M	{
233	1.26M	WORD32 i4_idx;
234	1.26M	i4_idx = 1;
235	1.26M	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
236	333k	i4_idx = 0;
237
238	1.26M	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
239	1.26M	ps_dec->ai2_idct_stg1,
240	1.26M	(UWORD8 *)gau1_impeg2_zerobuf,
241	1.26M	pu1_out_p + u4_blk_pos,
242	1.26M	8,
243	1.26M	8,
244	1.26M	u4_frame_width << ps_dec->u2_field_dct,
245	1.26M	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
246
247	1.26M	}
248
249	1.26M	}
250
251		/* For U and V blocks, divide the x and y offsets by 2. */
252	319k	u4_x_dst_offset >>= 1;
253	319k	u4_y_dst_offset >>= 2;
254
255		/* In case of chrominance blocks the DCT will be frame DCT */
256		/* i = 0, U component and */
257
258	319k	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
259	319k	ps_dec->pu1_inv_scan_matrix, 1, U_CHROMA, 0);
260	319k	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
261	958	{
262	958	return e_error;
263	958	}
264
265	318k	pu1_out_p = ps_cur_frm_buf->pu1_u + u4_x_dst_offset + u4_y_dst_offset;
266	318k	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
267	318k	PROFILE_DISABLE_IDCT_IF0
268	318k	{
269	318k	WORD32 i4_idx;
270	318k	i4_idx = 1;
271	318k	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
272	256k	i4_idx = 0;
273
274	318k	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
275	318k	ps_dec->ai2_idct_stg1,
276	318k	(UWORD8 *)gau1_impeg2_zerobuf,
277	318k	pu1_out_p,
278	318k	8,
279	318k	8,
280	318k	u4_frame_width >> 1,
281	318k	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
282
283	318k	}
284		/* Write the idct_out block to the current frame dec->curFrame*/
285		/* In case of field DCT type, write to alternate lines */
286	318k	e_error = ps_dec->pf_vld_inv_quant(ps_dec, pi2_vld_out,
287	318k	ps_dec->pu1_inv_scan_matrix, 1, V_CHROMA, 0);
288	318k	if ((IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE != e_error)
289	976	{
290	976	return e_error;
291	976	}
292
293	317k	pu1_out_p = ps_cur_frm_buf->pu1_v + u4_x_dst_offset + u4_y_dst_offset;
294	317k	IMPEG2D_IDCT_INP_STATISTICS(pi2_vld_out, ps_dec->u4_non_zero_cols, ps_dec->u4_non_zero_rows);
295	317k	PROFILE_DISABLE_IDCT_IF0
296	317k	{
297	317k	WORD32 i4_idx;
298	317k	i4_idx = 1;
299	317k	if(1 == (ps_dec->u4_non_zero_cols \| ps_dec->u4_non_zero_rows))
300	274k	i4_idx = 0;
301	317k	ps_dec->pf_idct_recon[i4_idx * 2 + ps_dec->i4_last_value_one](pi2_vld_out,
302	317k	ps_dec->ai2_idct_stg1,
303	317k	(UWORD8 *)gau1_impeg2_zerobuf,
304	317k	pu1_out_p,
305	317k	8,
306	317k	8,
307	317k	u4_frame_width >> 1,
308	317k	~ps_dec->u4_non_zero_cols, ~ps_dec->u4_non_zero_rows);
309	317k	}
310	317k	ps_dec->u2_num_mbs_left--;
311
312
313	317k	ps_dec->u2_mb_x++;
314
315	317k	if(ps_dec->s_bit_stream.u4_offset > ps_dec->s_bit_stream.u4_max_offset)
316	699	{
317	699	return IMPEG2D_BITSTREAM_BUFF_EXCEEDED_ERR;
318	699	}
319	316k	else if (ps_dec->u2_mb_x == ps_dec->u2_num_horiz_mb)
320	8.98k	{
321	8.98k	ps_dec->u2_mb_x = 0;
322	8.98k	ps_dec->u2_mb_y++;
323	8.98k	}
324
325	317k	}
326	316k	while(ps_dec->u2_num_mbs_left != 0 && impeg2d_bit_stream_nxt(&ps_dec->s_bit_stream,23) != 0x0);
327	2.88k	return e_error;
328	9.04k	}