/****************************************************************************** * * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ /** ******************************************************************************* * @file * ih264e_mc.c * * @brief * Contains definition of functions for motion compensation * * @author * ittiam * * @par List of Functions: * - ih264e_motion_comp_luma() * - ih264e_motion_comp_chroma() * * @remarks * None * ******************************************************************************* */ /*****************************************************************************/ /* File Includes */ /*****************************************************************************/ /* System include files */ #include /* User include files */ #include "ih264_typedefs.h" #include "ih264_defs.h" #include "iv2.h" #include "ive2.h" #include "ime_distortion_metrics.h" #include "ime_defs.h" #include "ime_structs.h" #include "ih264_structs.h" #include "ih264_inter_pred_filters.h" #include "ih264_mem_fns.h" #include "ih264_padding.h" #include "ih264_intra_pred_filters.h" #include "ih264_deblk_edge_filters.h" #include "ih264_trans_quant_itrans_iquant.h" #include "ih264_cabac_tables.h" #include "ih264e_defs.h" #include "ih264e_error.h" #include "ih264e_bitstream.h" #include "irc_cntrl_param.h" #include "irc_frame_info_collector.h" #include "ih264e_rate_control.h" #include "ih264e_cabac_structs.h" #include "ih264e_structs.h" #include "ih264e_mc.h" #include "ih264e_half_pel.h" /*****************************************************************************/ /* Function Definitions */ /*****************************************************************************/ /** ****************************************************************************** * * @brief * performs motion compensation for a luma mb for the given mv. * * @par Description * This routine performs motion compensation of an inter mb. When the inter * mb mode is P16x16, there is no need to copy 16x16 unit from reference buffer * to pred buffer. In this case the function returns pointer and stride of the * ref. buffer and this info is used in place of pred buffer else where. * In other cases, the pred buffer is populated via copy / filtering + copy * (q pel cases) and returned. * * @param[in] ps_proc * pointer to current proc ctxt * * @param[out] pu1_pseudo_pred * pseudo prediction buffer * * @param[out] u4_pseudo_pred_strd * pseudo pred buffer stride * * @return none * * @remarks Assumes half pel buffers for the entire frame are populated. * ****************************************************************************** */ void ih264e_motion_comp_luma(process_ctxt_t *ps_proc, UWORD8 **pu1_pseudo_pred, WORD32 *pi4_pseudo_pred_strd) { /* codec context */ codec_t *ps_codec = ps_proc->ps_codec; /* me ctxt */ me_ctxt_t *ps_me_ctxt = &ps_proc->s_me_ctxt; /* Pointer to the structure having motion vectors, size and position of curr partitions */ enc_pu_t *ps_curr_pu; /* pointers to full pel, half pel x, half pel y, half pel xy reference buffer */ UWORD8 *pu1_ref[4]; /* pred buffer ptr */ UWORD8 *pu1_pred; /* strides of full pel, half pel x, half pel y, half pel xy reference buffer */ WORD32 i4_ref_strd[4]; /* pred buffer stride */ WORD32 i4_pred_strd = ps_proc->i4_pred_strd; /* full pel motion vectors */ WORD32 u4_mv_x_full, u4_mv_y_full; /* half pel motion vectors */ WORD32 u4_mv_x_hpel, u4_mv_y_hpel; /* quarter pel motion vectors */ WORD32 u4_mv_x_qpel, u4_mv_y_qpel; /* width & height of the partition */ UWORD32 wd, ht; /* partition idx */ UWORD32 u4_num_prtn; /* half / qpel coefficient */ UWORD32 u4_subpel_factor; /* BIPRED Flag */ WORD32 i4_bipred_flag; /* temp var */ UWORD32 u4_lkup_idx1; /* Init */ i4_ref_strd[0] = ps_proc->i4_rec_strd; i4_ref_strd[1] = i4_ref_strd[2] = i4_ref_strd[3] = ps_me_ctxt->u4_subpel_buf_strd; for (u4_num_prtn = 0; u4_num_prtn < ps_proc->u4_num_sub_partitions; u4_num_prtn++) { mv_t *ps_curr_mv; /* update ptr to curr partition */ ps_curr_pu = ps_proc->ps_pu + u4_num_prtn; /* Set no no bipred */ i4_bipred_flag = 0; switch (ps_curr_pu->b2_pred_mode) { case PRED_L0: ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv; pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0]; break; case PRED_L1: ps_curr_mv = &ps_curr_pu->s_me_info[1].s_mv; pu1_ref[0] = ps_proc->apu1_ref_buf_luma[1]; break; case PRED_BI: /* * In case of PRED_BI, we only need to ensure that * the reference buffer that gets selected is * ps_proc->pu1_best_subpel_buf */ /* Dummy */ ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv; pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0]; i4_bipred_flag = 1; break; default: ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv; pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0]; break; } /* get full pel mv's (full pel units) */ u4_mv_x_full = ps_curr_mv->i2_mvx >> 2; u4_mv_y_full = ps_curr_mv->i2_mvy >> 2; /* get half pel mv's */ u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1; u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1; /* get quarter pel mv's */ u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1); u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1); /* width and height of partition */ wd = (ps_curr_pu->b4_wd + 1) << 2; ht = (ps_curr_pu->b4_ht + 1) << 2; /* decision ? qpel/hpel, fpel */ u4_subpel_factor = (u4_mv_y_hpel << 3) + (u4_mv_x_hpel << 2) + (u4_mv_y_qpel << 1) + (u4_mv_x_qpel); /* Move ref to position given by MV */ pu1_ref[0] += ((u4_mv_y_full * i4_ref_strd[0]) + u4_mv_x_full); /* Sub pel ptrs/ Biperd pointers init */ pu1_ref[1] = ps_proc->pu1_best_subpel_buf; i4_ref_strd[1] = ps_proc->u4_bst_spel_buf_strd; /* update pred buff ptr */ pu1_pred = ps_proc->pu1_pred_mb + 4 * ps_curr_pu->b4_pos_y * i4_pred_strd + 4 * ps_curr_pu->b4_pos_x; /* u4_lkup_idx1 will be non zero for half pel and bipred */ u4_lkup_idx1 = ((u4_subpel_factor >> 2) != 0) || i4_bipred_flag; { /********************************************************************/ /* if the block is P16x16 MB and mv are not quarter pel motion */ /* vectors, there is no need to copy 16x16 unit from reference frame*/ /* to pred buffer. We might as well send the reference frame buffer */ /* pointer as pred buffer (ofc with updated stride) to fwd transform*/ /* and inverse transform unit. */ /********************************************************************/ if (ps_proc->u4_num_sub_partitions == 1) { *pu1_pseudo_pred = pu1_ref[u4_lkup_idx1]; *pi4_pseudo_pred_strd = i4_ref_strd[u4_lkup_idx1]; } /* * Copying half pel or full pel to prediction buffer * Currently ps_proc->u4_num_sub_partitions will always be 1 as we only support 16x16 in P mbs */ else { ps_codec->pf_inter_pred_luma_copy(pu1_ref[u4_lkup_idx1], pu1_pred, i4_ref_strd[u4_lkup_idx1], i4_pred_strd, ht, wd, NULL, 0); } } } } /** ****************************************************************************** * * @brief * performs motion compensation for chroma mb * * @par Description * Copies a MB of data from the reference buffer (Full pel, half pel or q pel) * according to the motion vectors given * * @param[in] ps_proc * pointer to current proc ctxt * * @return none * * @remarks Assumes half pel and quarter pel buffers for the entire frame are * populated. ****************************************************************************** */ void ih264e_motion_comp_chroma(process_ctxt_t *ps_proc) { /* codec context */ codec_t *ps_codec = ps_proc->ps_codec; /* Pointer to the structure having motion vectors, size and position of curr partitions */ enc_pu_t *ps_curr_pu; /* pointers to full pel, half pel x, half pel y, half pel xy reference buffer */ UWORD8 *pu1_ref; /* pred buffer ptr */ UWORD8 *pu1_pred; /* strides of full pel reference buffer */ WORD32 i4_ref_strd = ps_proc->i4_rec_strd; /* pred buffer stride */ WORD32 i4_pred_strd = ps_proc->i4_pred_strd; /* full pel motion vectors */ WORD32 u4_mv_x_full, u4_mv_y_full; /* half pel motion vectors */ WORD32 u4_mv_x_hpel, u4_mv_y_hpel; /* quarter pel motion vectors */ WORD32 u4_mv_x_qpel, u4_mv_y_qpel; /* width & height of the partition */ UWORD32 wd, ht; /* partition idx */ UWORD32 u4_num_prtn; WORD32 u4_mv_x; WORD32 u4_mv_y; UWORD8 u1_dx, u1_dy; for (u4_num_prtn = 0; u4_num_prtn < ps_proc->u4_num_sub_partitions; u4_num_prtn++) { mv_t *ps_curr_mv; ps_curr_pu = ps_proc->ps_pu + u4_num_prtn; if (ps_curr_pu->b2_pred_mode != PRED_BI) { ps_curr_mv = &ps_curr_pu->s_me_info[ps_curr_pu->b2_pred_mode].s_mv; pu1_ref = ps_proc->apu1_ref_buf_chroma[ps_curr_pu->b2_pred_mode]; u4_mv_x = ps_curr_mv->i2_mvx >> 3; u4_mv_y = ps_curr_mv->i2_mvy >> 3; /* corresponds to full pel motion vector in luma, but in chroma corresponds to pel formed wiith dx, dy =4 */ u4_mv_x_full = (ps_curr_mv->i2_mvx & 0x4) >> 2; u4_mv_y_full = (ps_curr_mv->i2_mvy & 0x4) >> 2; /* get half pel mv's */ u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1; u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1; /* get quarter pel mv's */ u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1); u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1); /* width and height of sub macro block */ wd = (ps_curr_pu->b4_wd + 1) << 1; ht = (ps_curr_pu->b4_ht + 1) << 1; /* move the pointers so that they point to the motion compensated locations */ pu1_ref += ((u4_mv_y * i4_ref_strd) + (u4_mv_x << 1)); pu1_pred = ps_proc->pu1_pred_mb + 4 * ps_curr_pu->b4_pos_y * i4_pred_strd + 2 * ps_curr_pu->b4_pos_x; u1_dx = (u4_mv_x_full << 2) + (u4_mv_x_hpel << 1) + (u4_mv_x_qpel); u1_dy = (u4_mv_y_full << 2) + (u4_mv_y_hpel << 1) + (u4_mv_y_qpel); /* cases where u1_dx = 0 or u1_dy = 0 are dealt separately in neon with * separate functions for better performance * * ih264_inter_pred_chroma_dx_zero_a9q * and * ih264_inter_pred_chroma_dy_zero_a9q */ ps_codec->pf_inter_pred_chroma(pu1_ref, pu1_pred, i4_ref_strd, i4_pred_strd, u1_dx, u1_dy, ht, wd); } else /* If the pred mode is PRED_BI */ { /* * We need to interpolate the L0 and L1 ref pics with the chorma MV * then use them to average for bilinrar interpred */ WORD32 i4_predmode; UWORD8 *pu1_ref_buf[2]; /* Temporary buffers to store the interpolated value from L0 and L1 */ pu1_ref_buf[PRED_L0] = ps_proc->apu1_subpel_buffs[0]; pu1_ref_buf[PRED_L1] = ps_proc->apu1_subpel_buffs[1]; for (i4_predmode = 0; i4_predmode < PRED_BI; i4_predmode++) { ps_curr_mv = &ps_curr_pu->s_me_info[i4_predmode].s_mv; pu1_ref = ps_proc->apu1_ref_buf_chroma[i4_predmode]; u4_mv_x = ps_curr_mv->i2_mvx >> 3; u4_mv_y = ps_curr_mv->i2_mvy >> 3; /* * corresponds to full pel motion vector in luma, but in chroma * corresponds to pel formed wiith dx, dy =4 */ u4_mv_x_full = (ps_curr_mv->i2_mvx & 0x4) >> 2; u4_mv_y_full = (ps_curr_mv->i2_mvy & 0x4) >> 2; /* get half pel mv's */ u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1; u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1; /* get quarter pel mv's */ u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1); u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1); /* width and height of sub macro block */ wd = (ps_curr_pu->b4_wd + 1) << 1; ht = (ps_curr_pu->b4_ht + 1) << 1; /* move the pointers so that they point to the motion compensated locations */ pu1_ref += ((u4_mv_y * i4_ref_strd) + (u4_mv_x << 1)); pu1_pred = ps_proc->pu1_pred_mb + 4 * ps_curr_pu->b4_pos_y * i4_pred_strd + 2 * ps_curr_pu->b4_pos_x; u1_dx = (u4_mv_x_full << 2) + (u4_mv_x_hpel << 1) + (u4_mv_x_qpel); u1_dy = (u4_mv_y_full << 2) + (u4_mv_y_hpel << 1) + (u4_mv_y_qpel); ps_codec->pf_inter_pred_chroma(pu1_ref, pu1_ref_buf[i4_predmode], i4_ref_strd, MB_SIZE, u1_dx, u1_dy, ht, wd); } ps_codec->pf_inter_pred_luma_bilinear(pu1_ref_buf[PRED_L0], pu1_ref_buf[PRED_L1], pu1_pred, MB_SIZE, MB_SIZE, i4_pred_strd, MB_SIZE >> 1, MB_SIZE); } } }