/****************************************************************************** * * 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 #include #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_globals.h" #include "impeg2d_vld_tables.h" #include "impeg2d_vld.h" #include "impeg2d_pic_proc.h" #include "impeg2d_debug.h" void impeg2d_init_function_ptr(void *pv_codec); void impeg2d_format_convert(dec_state_t *ps_dec, pic_buf_t *ps_src_pic, iv_yuv_buf_t *ps_disp_frm_buf, UWORD32 u4_start_row, UWORD32 u4_num_rows) { UWORD8 *pu1_src_y,*pu1_src_u,*pu1_src_v; UWORD8 *pu1_dst_y,*pu1_dst_u,*pu1_dst_v; if((NULL == ps_src_pic) || (NULL == ps_src_pic->pu1_y) || (0 == u4_num_rows)) return; pu1_src_y = ps_src_pic->pu1_y + (u4_start_row * ps_dec->u2_frame_width); pu1_src_u = ps_src_pic->pu1_u + ((u4_start_row >> 1) * (ps_dec->u2_frame_width >> 1)); pu1_src_v = ps_src_pic->pu1_v + ((u4_start_row >> 1) *(ps_dec->u2_frame_width >> 1)); pu1_dst_y = (UWORD8 *)ps_disp_frm_buf->pv_y_buf + (u4_start_row * ps_dec->u4_frm_buf_stride); pu1_dst_u = (UWORD8 *)ps_disp_frm_buf->pv_u_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride >> 1)); pu1_dst_v = (UWORD8 *)ps_disp_frm_buf->pv_v_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride >> 1)); if (IV_YUV_420P == ps_dec->i4_chromaFormat) { ps_dec->pf_copy_yuv420p_buf(pu1_src_y, pu1_src_u, pu1_src_v, pu1_dst_y, pu1_dst_u, pu1_dst_v, ps_dec->u2_horizontal_size, u4_num_rows, ps_dec->u2_frame_width, (ps_dec->u2_frame_width >> 1), (ps_dec->u2_frame_width >> 1), ps_dec->u4_frm_buf_stride, (ps_dec->u4_frm_buf_stride >> 1), (ps_dec->u4_frm_buf_stride >> 1)); } else if (IV_YUV_422ILE == ps_dec->i4_chromaFormat) { void *pv_yuv422i; UWORD32 u2_height,u2_width,u2_stride_y,u2_stride_u,u2_stride_v; UWORD32 u2_stride_yuv422i; pv_yuv422i = (UWORD8 *)ps_disp_frm_buf->pv_y_buf + ((ps_dec->u2_vertical_size)*(ps_dec->u4_frm_buf_stride)); u2_height = u4_num_rows; u2_width = ps_dec->u2_horizontal_size; u2_stride_y = ps_dec->u2_frame_width; u2_stride_u = u2_stride_y >> 1; u2_stride_v = u2_stride_u; u2_stride_yuv422i = (0 == ps_dec->u4_frm_buf_stride) ? ps_dec->u2_horizontal_size : ps_dec->u4_frm_buf_stride; ps_dec->pf_fmt_conv_yuv420p_to_yuv422ile(pu1_src_y, pu1_src_u, pu1_src_v, pv_yuv422i, u2_width, u2_height, u2_stride_y, u2_stride_u, u2_stride_v, u2_stride_yuv422i); } else if((ps_dec->i4_chromaFormat == IV_YUV_420SP_UV) || (ps_dec->i4_chromaFormat == IV_YUV_420SP_VU)) { UWORD32 dest_inc_Y=0,dest_inc_UV=0; WORD32 convert_uv_only; pu1_dst_u = (UWORD8 *)ps_disp_frm_buf->pv_u_buf +((u4_start_row >> 1)*(ps_dec->u4_frm_buf_stride)); dest_inc_Y = ps_dec->u4_frm_buf_stride; dest_inc_UV = ((ps_dec->u4_frm_buf_stride + 1) >> 1) << 1; convert_uv_only = 0; if(1 == ps_dec->u4_share_disp_buf) convert_uv_only = 1; if(ps_src_pic->pu1_y == ps_disp_frm_buf->pv_y_buf) convert_uv_only = 1; if(ps_dec->i4_chromaFormat == IV_YUV_420SP_UV) { ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_uv(pu1_src_y, pu1_src_u, pu1_src_v, pu1_dst_y, pu1_dst_u, u4_num_rows, ps_dec->u2_horizontal_size, ps_dec->u2_frame_width, ps_dec->u2_frame_width >> 1, ps_dec->u2_frame_width >> 1, dest_inc_Y, dest_inc_UV, convert_uv_only); } else { ps_dec->pf_fmt_conv_yuv420p_to_yuv420sp_vu(pu1_src_y, pu1_src_u, pu1_src_v, pu1_dst_y, pu1_dst_u, u4_num_rows, ps_dec->u2_horizontal_size, ps_dec->u2_frame_width, ps_dec->u2_frame_width >> 1, ps_dec->u2_frame_width >> 1, dest_inc_Y, dest_inc_UV, convert_uv_only); } } } /******************************************************************************* * * Function Name : impeg2d_get_frm_buf * * Description : Gets YUV component buffers for the frame * * Arguments : * frm_buf : YUV buffer * frm : Reference frame * width : Width of the frame * Height : Height of the frame * * Values Returned : None *******************************************************************************/ void impeg2d_get_frm_buf(yuv_buf_t *ps_frm_buf,UWORD8 *pu1_frm,UWORD32 u4_width,UWORD32 u4_height) { UWORD32 u4_luma_size = u4_width * u4_height; UWORD32 u4_chroma_size = (u4_width * u4_height)>>2; ps_frm_buf->pu1_y = pu1_frm; ps_frm_buf->pu1_u = pu1_frm + u4_luma_size; ps_frm_buf->pu1_v = pu1_frm + u4_luma_size + u4_chroma_size; } /******************************************************************************* * * Function Name : impeg2d_get_bottom_field_buf * * Description : Gets YUV component buffers for bottom field of the frame * * Arguments : * frm_buf : YUV buffer * frm : Reference frame * width : Width of the frame * Height : Height of the frame * * Values Returned : None *******************************************************************************/ void impeg2d_get_bottom_field_buf(yuv_buf_t *ps_src_buf,yuv_buf_t *ps_dst_buf, UWORD32 u4_width) { ps_dst_buf->pu1_y = ps_src_buf->pu1_y + u4_width; ps_dst_buf->pu1_u = ps_src_buf->pu1_u + (u4_width>>1); ps_dst_buf->pu1_v = ps_src_buf->pu1_v + (u4_width>>1); } /******************************************************************************* * Function Name : impeg2d_get_mb_addr_incr * * Description : Decodes the Macroblock address increment * * Arguments : * stream : Bitstream * * Values Returned : Macroblock address increment *******************************************************************************/ UWORD16 impeg2d_get_mb_addr_incr(stream_t *ps_stream) { UWORD16 u2_mb_addr_incr = 0; while (impeg2d_bit_stream_nxt(ps_stream,MB_ESCAPE_CODE_LEN) == MB_ESCAPE_CODE && ps_stream->u4_offset < ps_stream->u4_max_offset) { impeg2d_bit_stream_flush(ps_stream,MB_ESCAPE_CODE_LEN); u2_mb_addr_incr += 33; } u2_mb_addr_incr += impeg2d_dec_vld_symbol(ps_stream,gai2_impeg2d_mb_addr_incr,MB_ADDR_INCR_LEN) + MB_ADDR_INCR_OFFSET; return(u2_mb_addr_incr); } /******************************************************************************* * * Function Name : impeg2d_init_video_state * * Description : Initializes the Video decoder state * * Arguments : * dec : Decoder context * videoType : MPEG_2_Video / MPEG_1_Video * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_init_video_state(dec_state_t *ps_dec, e_video_type_t e_video_type) { /*-----------------------------------------------------------------------*/ /* Bit Stream that conforms to MPEG-1 standard */ /*-----------------------------------------------------------------------*/ if(e_video_type == MPEG_1_VIDEO) { ps_dec->u2_is_mpeg2 = 0; /*-------------------------------------------------------------------*/ /* force MPEG-1 parameters for proper decoder behavior */ /* see ISO/IEC 13818-2 section D.9.14 */ /*-------------------------------------------------------------------*/ ps_dec->u2_progressive_sequence = 1; ps_dec->u2_intra_dc_precision = 0; ps_dec->u2_picture_structure = FRAME_PICTURE; ps_dec->u2_frame_pred_frame_dct = 1; ps_dec->u2_concealment_motion_vectors = 0; ps_dec->u2_q_scale_type = 0; ps_dec->u2_intra_vlc_format = 0; ps_dec->u2_alternate_scan = 0; ps_dec->u2_repeat_first_field = 0; ps_dec->u2_progressive_frame = 1; ps_dec->u2_frame_rate_extension_n = 0; ps_dec->u2_frame_rate_extension_d = 0; ps_dec->u2_forw_f_code = 7; ps_dec->u2_back_f_code = 7; ps_dec->pf_vld_inv_quant = impeg2d_vld_inv_quant_mpeg1; /*-------------------------------------------------------------------*/ /* Setting of parameters other than those mentioned in MPEG2 standard*/ /* but used in decoding process. */ /*-------------------------------------------------------------------*/ } /*-----------------------------------------------------------------------*/ /* Bit Stream that conforms to MPEG-2 */ /*-----------------------------------------------------------------------*/ else { ps_dec->u2_is_mpeg2 = 1; ps_dec->u2_full_pel_forw_vector = 0; ps_dec->u2_forw_f_code = 7; ps_dec->u2_full_pel_back_vector = 0; ps_dec->u2_back_f_code = 7; ps_dec->pf_vld_inv_quant = impeg2d_vld_inv_quant_mpeg2; } impeg2d_init_function_ptr(ps_dec); /* Set the frame Width and frame Height */ ps_dec->u2_frame_height = ALIGN16(ps_dec->u2_vertical_size); ps_dec->u2_frame_width = ALIGN16(ps_dec->u2_horizontal_size); ps_dec->u2_num_horiz_mb = (ps_dec->u2_horizontal_size + 15) >> 4; // dec->u4_frm_buf_stride = dec->frameWidth; if (ps_dec->u2_frame_height > ps_dec->u2_create_max_height || ps_dec->u2_frame_width > ps_dec->u2_create_max_width) { return IMPEG2D_PIC_SIZE_NOT_SUPPORTED; } ps_dec->u2_num_flds_decoded = 0; /* Calculate the frame period */ { UWORD32 numer; UWORD32 denom; numer = (UWORD32)gau2_impeg2_frm_rate_code[ps_dec->u2_frame_rate_code][1] * (UWORD32)(ps_dec->u2_frame_rate_extension_d + 1); denom = (UWORD32)gau2_impeg2_frm_rate_code[ps_dec->u2_frame_rate_code][0] * (UWORD32)(ps_dec->u2_frame_rate_extension_n + 1); ps_dec->u2_framePeriod = (numer * 1000 * 100) / denom; } if(VERTICAL_SCAN == ps_dec->u2_alternate_scan) { ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_vertical; } else { ps_dec->pu1_inv_scan_matrix = (UWORD8 *)gau1_impeg2_inv_scan_zig_zag; } return (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; } /******************************************************************************* * * Function Name : impeg2d_pre_pic_dec_proc * * Description : Does the processing neccessary before picture decoding * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ IMPEG2D_ERROR_CODES_T impeg2d_pre_pic_dec_proc(dec_state_t *ps_dec) { WORD32 u4_get_disp; pic_buf_t *ps_disp_pic; IMPEG2D_ERROR_CODES_T e_error = (IMPEG2D_ERROR_CODES_T)IVD_ERROR_NONE; u4_get_disp = 0; ps_disp_pic = NULL; /* Field Picture */ if(ps_dec->u2_picture_structure != FRAME_PICTURE) { ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 31) >> 5; if(ps_dec->u2_num_flds_decoded == 0) { pic_buf_t *ps_pic_buf; u4_get_disp = 1; ps_pic_buf = impeg2_buf_mgr_get_next_free(ps_dec->pv_pic_buf_mg, &ps_dec->i4_cur_buf_id); if (NULL == ps_pic_buf) { return IMPEG2D_NO_FREE_BUF_ERR; } impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_DISP); impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_REF); if(ps_dec->u4_deinterlace) impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, MPEG2_BUF_MGR_DEINT); ps_pic_buf->e_pic_type = ps_dec->e_pic_type; ps_dec->ps_cur_pic = ps_pic_buf; ps_dec->s_cur_frm_buf.pu1_y = ps_pic_buf->pu1_y; ps_dec->s_cur_frm_buf.pu1_u = ps_pic_buf->pu1_u; ps_dec->s_cur_frm_buf.pu1_v = ps_pic_buf->pu1_v; } else { /* Timestamp associated with second field is associated with the current picture */ ps_dec->ps_cur_pic->u4_ts = ps_dec->u4_inp_ts; } if(ps_dec->u2_picture_structure == TOP_FIELD) { ps_dec->u2_fld_parity = TOP; } else { ps_dec->u2_fld_parity = BOTTOM; } ps_dec->u2_field_dct = 0; ps_dec->u2_read_dct_type = 0; ps_dec->u2_read_motion_type = 1; ps_dec->u2_fld_pic = 1; ps_dec->u2_frm_pic = 0; ps_dec->ps_func_forw_or_back = gas_impeg2d_func_fld_fw_or_bk; ps_dec->ps_func_bi_direct = gas_impeg2d_func_fld_bi_direct; } /* Frame Picture */ else { pic_buf_t *ps_pic_buf; ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 15) >> 4; u4_get_disp = 1; ps_pic_buf = impeg2_buf_mgr_get_next_free(ps_dec->pv_pic_buf_mg, &ps_dec->i4_cur_buf_id); if (NULL == ps_pic_buf) { return IMPEG2D_NO_FREE_BUF_ERR; } impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_DISP); impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, BUF_MGR_REF); if(ps_dec->u4_deinterlace) impeg2_buf_mgr_set_status((buf_mgr_t *)ps_dec->pv_pic_buf_mg, ps_dec->i4_cur_buf_id, MPEG2_BUF_MGR_DEINT); ps_pic_buf->u4_ts = ps_dec->u4_inp_ts; ps_pic_buf->e_pic_type = ps_dec->e_pic_type; ps_dec->ps_cur_pic = ps_pic_buf; ps_dec->s_cur_frm_buf.pu1_y = ps_pic_buf->pu1_y; ps_dec->s_cur_frm_buf.pu1_u = ps_pic_buf->pu1_u; ps_dec->s_cur_frm_buf.pu1_v = ps_pic_buf->pu1_v; if(ps_dec->u2_frame_pred_frame_dct == 0) { ps_dec->u2_read_dct_type = 1; ps_dec->u2_read_motion_type = 1; } else { ps_dec->u2_read_dct_type = 0; ps_dec->u2_read_motion_type = 0; ps_dec->u2_motion_type = 2; ps_dec->u2_field_dct = 0; } ps_dec->u2_fld_parity = TOP; ps_dec->u2_fld_pic = 0; ps_dec->u2_frm_pic = 1; ps_dec->ps_func_forw_or_back = gas_impeg2d_func_frm_fw_or_bk; ps_dec->ps_func_bi_direct = gas_impeg2d_func_frm_bi_direct; } ps_dec->u2_def_dc_pred[Y_LUMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[U_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_def_dc_pred[V_CHROMA] = 128 << ps_dec->u2_intra_dc_precision; ps_dec->u2_num_mbs_left = ps_dec->u2_num_horiz_mb * ps_dec->u2_num_vert_mb; if(u4_get_disp) { if(ps_dec->u4_num_frames_decoded > 1) { ps_disp_pic = impeg2_disp_mgr_get(&ps_dec->s_disp_mgr, &ps_dec->i4_disp_buf_id); } ps_dec->ps_disp_pic = ps_disp_pic; if(ps_disp_pic) { if(1 == ps_dec->u4_share_disp_buf) { ps_dec->ps_disp_frm_buf->pv_y_buf = ps_disp_pic->pu1_y; if(IV_YUV_420P == ps_dec->i4_chromaFormat) { ps_dec->ps_disp_frm_buf->pv_u_buf = ps_disp_pic->pu1_u; ps_dec->ps_disp_frm_buf->pv_v_buf = ps_disp_pic->pu1_v; } else { UWORD8 *pu1_buf; pu1_buf = ps_dec->as_disp_buffers[ps_disp_pic->i4_buf_id].pu1_bufs[1]; ps_dec->ps_disp_frm_buf->pv_u_buf = pu1_buf; pu1_buf = ps_dec->as_disp_buffers[ps_disp_pic->i4_buf_id].pu1_bufs[2]; ps_dec->ps_disp_frm_buf->pv_v_buf = pu1_buf; } } } } switch(ps_dec->e_pic_type) { case I_PIC: { ps_dec->pf_decode_slice = impeg2d_dec_i_slice; break; } case D_PIC: { ps_dec->pf_decode_slice = impeg2d_dec_d_slice; break; } case P_PIC: { ps_dec->pf_decode_slice = impeg2d_dec_p_b_slice; ps_dec->pu2_mb_type = gau2_impeg2d_p_mb_type; break; } case B_PIC: { ps_dec->pf_decode_slice = impeg2d_dec_p_b_slice; ps_dec->pu2_mb_type = gau2_impeg2d_b_mb_type; break; } default: return IMPEG2D_INVALID_PIC_TYPE; } /*************************************************************************/ /* Set the reference pictures */ /*************************************************************************/ /* Error resilience: If forward and backward pictures are going to be NULL*/ /* then assign both to the current */ /* if one of them NULL then we will assign the non null to the NULL one */ if(ps_dec->e_pic_type == P_PIC) { if (NULL == ps_dec->as_recent_fld[1][0].pu1_y) { ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf; } if (NULL == ps_dec->as_recent_fld[1][1].pu1_y) { impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1], ps_dec->u2_frame_width); } ps_dec->as_ref_buf[FORW][TOP] = ps_dec->as_recent_fld[1][0]; ps_dec->as_ref_buf[FORW][BOTTOM] = ps_dec->as_recent_fld[1][1]; } else if(ps_dec->e_pic_type == B_PIC) { if((NULL == ps_dec->as_recent_fld[1][0].pu1_y) && (NULL == ps_dec->as_recent_fld[0][0].pu1_y)) { // assign the current picture to both ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf; impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1], ps_dec->u2_frame_width); ps_dec->as_recent_fld[0][0] = ps_dec->s_cur_frm_buf; ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; } //Assign the non-null picture to the null picture else if ((NULL != ps_dec->as_recent_fld[1][0].pu1_y) && (NULL == ps_dec->as_recent_fld[0][0].pu1_y)) { ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0]; ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; } else if ((NULL == ps_dec->as_recent_fld[1][0].pu1_y) && (NULL != ps_dec->as_recent_fld[0][0].pu1_y)) { ps_dec->as_recent_fld[1][0] = ps_dec->as_recent_fld[0][0]; ps_dec->as_recent_fld[1][1] = ps_dec->as_recent_fld[0][1]; } /* Error resilience: If forward and backward pictures are going to be NULL*/ /* then assign both to the current */ /* if one of them NULL then we will assign the non null to the NULL one */ if((NULL == ps_dec->as_recent_fld[0][1].pu1_y) && (NULL == ps_dec->as_recent_fld[1][1].pu1_y)) { // assign the current picture to both ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf; impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1], ps_dec->u2_frame_width); ps_dec->as_recent_fld[0][0] = ps_dec->s_cur_frm_buf; ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; } //Assign the non-null picture to the null picture else if((NULL == ps_dec->as_recent_fld[0][1].pu1_y) && (NULL != ps_dec->as_recent_fld[1][1].pu1_y)) { ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0]; ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; } else if((NULL == ps_dec->as_recent_fld[1][1].pu1_y) && (NULL != ps_dec->as_recent_fld[0][1].pu1_y)) { ps_dec->as_recent_fld[1][0] = ps_dec->as_recent_fld[0][0]; ps_dec->as_recent_fld[1][1] = ps_dec->as_recent_fld[0][1]; } ps_dec->as_ref_buf[FORW][TOP] = ps_dec->as_recent_fld[0][0]; ps_dec->as_ref_buf[FORW][BOTTOM] = ps_dec->as_recent_fld[0][1]; ps_dec->as_ref_buf[BACK][TOP] = ps_dec->as_recent_fld[1][0]; ps_dec->as_ref_buf[BACK][BOTTOM] = ps_dec->as_recent_fld[1][1]; } return e_error; } /******************************************************************************* * * Function Name : impeg2d_post_pic_dec_proc * * Description : Performs processing that is needed at the end of picture * decode * * Arguments : * dec : Decoder context * * Values Returned : None *******************************************************************************/ void impeg2d_post_pic_dec_proc(dec_state_t *ps_dec) { WORD32 u4_update_pic_buf = 0; /*************************************************************************/ /* Processing at the end of picture */ /*************************************************************************/ if(ps_dec->u2_picture_structure != FRAME_PICTURE) { ps_dec->u2_num_vert_mb = (ps_dec->u2_vertical_size + 31) >> 5; if(ps_dec->u2_num_flds_decoded == 1) { ps_dec->u2_num_flds_decoded = 0; u4_update_pic_buf = 1; } else { ps_dec->u2_num_flds_decoded = 1; } } else { u4_update_pic_buf = 1; } if(u4_update_pic_buf) { ps_dec->i4_frame_decoded = 1; if(ps_dec->e_pic_type != B_PIC) { /* In any sequence first two pictures have to be reference pictures */ /* Adding of first picture in the sequence */ if(ps_dec->aps_ref_pics[0] == NULL) { ps_dec->aps_ref_pics[0] = ps_dec->ps_cur_pic; } /* Adding of second picture in the sequence */ else if(ps_dec->aps_ref_pics[1] == NULL) { ps_dec->aps_ref_pics[1] = ps_dec->ps_cur_pic; impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->aps_ref_pics[0], ps_dec->aps_ref_pics[0]->i4_buf_id); } else { impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->aps_ref_pics[1], ps_dec->aps_ref_pics[1]->i4_buf_id); impeg2_buf_mgr_release(ps_dec->pv_pic_buf_mg, ps_dec->aps_ref_pics[0]->i4_buf_id, BUF_MGR_REF); ps_dec->aps_ref_pics[0] = ps_dec->aps_ref_pics[1]; ps_dec->aps_ref_pics[1] = ps_dec->ps_cur_pic; } } else { impeg2_disp_mgr_add(&ps_dec->s_disp_mgr, ps_dec->ps_cur_pic, ps_dec->ps_cur_pic->i4_buf_id); impeg2_buf_mgr_release(ps_dec->pv_pic_buf_mg, ps_dec->ps_cur_pic->i4_buf_id, BUF_MGR_REF); } } /*************************************************************************/ /* Update the list of recent reference pictures */ /*************************************************************************/ if(ps_dec->e_pic_type != B_PIC) { switch(ps_dec->u2_picture_structure) { case FRAME_PICTURE: { ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0]; ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf; impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1], ps_dec->u2_frame_width); break; } case TOP_FIELD: { ps_dec->as_recent_fld[0][0] = ps_dec->as_recent_fld[1][0]; ps_dec->as_recent_fld[1][0] = ps_dec->s_cur_frm_buf; break; } case BOTTOM_FIELD: { ps_dec->as_recent_fld[0][1] = ps_dec->as_recent_fld[1][1]; impeg2d_get_bottom_field_buf(&ps_dec->s_cur_frm_buf, &ps_dec->as_recent_fld[1][1], ps_dec->u2_frame_width); break; } } } }