| /****************************************************************************** |
| * |
| * 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 |
| * ihevc_weighted_pred.c |
| * |
| * @brief |
| * Contains function definitions for weighted prediction used in inter |
| * prediction |
| * |
| * @author |
| * Srinivas T |
| * |
| * @par List of Functions: |
| * - ihevc_weighted_pred_uni() |
| * - ihevc_weighted_pred_bi() |
| * - ihevc_weighted_pred_bi_default() |
| * - ihevc_weighted_pred_chroma_uni() |
| * - ihevc_weighted_pred_chroma_bi() |
| * - ihevc_weighted_pred_chroma_bi_default() |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| /*****************************************************************************/ |
| /* File Includes */ |
| /*****************************************************************************/ |
| #include "ihevc_typedefs.h" |
| #include "ihevc_defs.h" |
| #include "ihevc_macros.h" |
| #include "ihevc_platform_macros.h" |
| #include "ihevc_func_selector.h" |
| |
| #include "ihevc_inter_pred.h" |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does uni-weighted prediction on the array pointed by pi2_src and stores |
| * it at the location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src + lvl_shift) * wgt0 + (1 << (shift - 1)) ) >> shift + |
| * offset |
| * |
| * @param[in] pi2_src |
| * Pointer to the source |
| * |
| * @param[out] pu1_dst |
| * Pointer to the destination |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] wgt0 |
| * weight to be multiplied to the source |
| * |
| * @param[in] off0 |
| * offset to be added after rounding and |
| * |
| * @param[in] shifting |
| * |
| * |
| * @param[in] shift |
| * (14 Bit depth) + log2_weight_denominator |
| * |
| * @param[in] lvl_shift |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_uni(WORD16 *pi2_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD32 wgt0, |
| WORD32 off0, |
| WORD32 shift, |
| WORD32 lvl_shift, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i4_tmp = (pi2_src[col] + lvl_shift) * wgt0; |
| i4_tmp += 1 << (shift - 1); |
| i4_tmp = (i4_tmp >> shift) + off0; |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp); |
| } |
| |
| pi2_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_UNI |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does chroma uni-weighted prediction on array pointed by pi2_src and stores |
| * it at the location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src + lvl_shift) * wgt0 + (1 << (shift - 1)) ) >> shift + |
| * offset |
| * |
| * @param[in] pi2_src |
| * Pointer to the source |
| * |
| * @param[out] pu1_dst |
| * Pointer to the destination |
| * |
| * @param[in] src_strd |
| * Source stride |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] wgt0 |
| * weight to be multiplied to the source |
| * |
| * @param[in] off0 |
| * offset to be added after rounding and |
| * |
| * @param[in] shifting |
| * |
| * |
| * @param[in] shift |
| * (14 Bit depth) + log2_weight_denominator |
| * |
| * @param[in] lvl_shift |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source (each colour component) |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_chroma_uni(WORD16 *pi2_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD32 wgt0_cb, |
| WORD32 wgt0_cr, |
| WORD32 off0_cb, |
| WORD32 off0_cr, |
| WORD32 shift, |
| WORD32 lvl_shift, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col += 2) |
| { |
| i4_tmp = (pi2_src[col] + lvl_shift) * wgt0_cb; |
| i4_tmp += 1 << (shift - 1); |
| i4_tmp = (i4_tmp >> shift) + off0_cb; |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp); |
| |
| i4_tmp = (pi2_src[col + 1] + lvl_shift) * wgt0_cr; |
| i4_tmp += 1 << (shift - 1); |
| i4_tmp = (i4_tmp >> shift) + off0_cr; |
| |
| pu1_dst[col + 1] = CLIP_U8(i4_tmp); |
| } |
| |
| pi2_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_CHROMA_UNI |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does bi-weighted prediction on the arrays pointed by pi2_src1 and |
| * pi2_src2 and stores it at location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src1 + lvl_shift1)*wgt0 + (src2 + lvl_shift2)*wgt1 + (off0 + |
| * off1 + 1) << (shift - 1) ) >> shift |
| * |
| * @param[in] pi2_src1 |
| * Pointer to source 1 |
| * |
| * @param[in] pi2_src2 |
| * Pointer to source 2 |
| * |
| * @param[out] pu1_dst |
| * Pointer to destination |
| * |
| * @param[in] src_strd1 |
| * Source stride 1 |
| * |
| * @param[in] src_strd2 |
| * Source stride 2 |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] wgt0 |
| * weight to be multiplied to source 1 |
| * |
| * @param[in] off0 |
| * offset 0 |
| * |
| * @param[in] wgt1 |
| * weight to be multiplied to source 2 |
| * |
| * @param[in] off1 |
| * offset 1 |
| * |
| * @param[in] shift |
| * (14 Bit depth) + log2_weight_denominator |
| * |
| * @param[in] lvl_shift1 |
| * added before shift and offset |
| * |
| * @param[in] lvl_shift2 |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_bi(WORD16 *pi2_src1, |
| WORD16 *pi2_src2, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd1, |
| WORD32 src_strd2, |
| WORD32 dst_strd, |
| WORD32 wgt0, |
| WORD32 off0, |
| WORD32 wgt1, |
| WORD32 off1, |
| WORD32 shift, |
| WORD32 lvl_shift1, |
| WORD32 lvl_shift2, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i4_tmp = (pi2_src1[col] + lvl_shift1) * wgt0; |
| i4_tmp += (pi2_src2[col] + lvl_shift2) * wgt1; |
| i4_tmp += (off0 + off1 + 1) << (shift - 1); |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp >> shift); |
| } |
| |
| pi2_src1 += src_strd1; |
| pi2_src2 += src_strd2; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_BI |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does chroma bi-weighted prediction on the arrays pointed by pi2_src1 and |
| * pi2_src2 and stores it at location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src1 + lvl_shift1)*wgt0 + (src2 + lvl_shift2)*wgt1 + (off0 + |
| * off1 + 1) << (shift - 1) ) >> shift |
| * |
| * @param[in] pi2_src1 |
| * Pointer to source 1 |
| * |
| * @param[in] pi2_src2 |
| * Pointer to source 2 |
| * |
| * @param[out] pu1_dst |
| * Pointer to destination |
| * |
| * @param[in] src_strd1 |
| * Source stride 1 |
| * |
| * @param[in] src_strd2 |
| * Source stride 2 |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] wgt0 |
| * weight to be multiplied to source 1 |
| * |
| * @param[in] off0 |
| * offset 0 |
| * |
| * @param[in] wgt1 |
| * weight to be multiplied to source 2 |
| * |
| * @param[in] off1 |
| * offset 1 |
| * |
| * @param[in] shift |
| * (14 Bit depth) + log2_weight_denominator |
| * |
| * @param[in] lvl_shift1 |
| * added before shift and offset |
| * |
| * @param[in] lvl_shift2 |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source (each colour component) |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_chroma_bi(WORD16 *pi2_src1, |
| WORD16 *pi2_src2, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd1, |
| WORD32 src_strd2, |
| WORD32 dst_strd, |
| WORD32 wgt0_cb, |
| WORD32 wgt0_cr, |
| WORD32 off0_cb, |
| WORD32 off0_cr, |
| WORD32 wgt1_cb, |
| WORD32 wgt1_cr, |
| WORD32 off1_cb, |
| WORD32 off1_cr, |
| WORD32 shift, |
| WORD32 lvl_shift1, |
| WORD32 lvl_shift2, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col += 2) |
| { |
| i4_tmp = (pi2_src1[col] + lvl_shift1) * wgt0_cb; |
| i4_tmp += (pi2_src2[col] + lvl_shift2) * wgt1_cb; |
| i4_tmp += (off0_cb + off1_cb + 1) << (shift - 1); |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp >> shift); |
| |
| i4_tmp = (pi2_src1[col + 1] + lvl_shift1) * wgt0_cr; |
| i4_tmp += (pi2_src2[col + 1] + lvl_shift2) * wgt1_cr; |
| i4_tmp += (off0_cr + off1_cr + 1) << (shift - 1); |
| |
| pu1_dst[col + 1] = CLIP_U8(i4_tmp >> shift); |
| } |
| |
| pi2_src1 += src_strd1; |
| pi2_src2 += src_strd2; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_CHROMA_BI |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does default bi-weighted prediction on the arrays pointed by pi2_src1 and |
| * pi2_src2 and stores it at location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src1 + lvl_shift1) + (src2 + lvl_shift2) + 1 << (shift - 1) ) |
| * >> shift where shift = 15 - BitDepth |
| * |
| * @param[in] pi2_src1 |
| * Pointer to source 1 |
| * |
| * @param[in] pi2_src2 |
| * Pointer to source 2 |
| * |
| * @param[out] pu1_dst |
| * Pointer to destination |
| * |
| * @param[in] src_strd1 |
| * Source stride 1 |
| * |
| * @param[in] src_strd2 |
| * Source stride 2 |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] lvl_shift1 |
| * added before shift and offset |
| * |
| * @param[in] lvl_shift2 |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_bi_default(WORD16 *pi2_src1, |
| WORD16 *pi2_src2, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd1, |
| WORD32 src_strd2, |
| WORD32 dst_strd, |
| WORD32 lvl_shift1, |
| WORD32 lvl_shift2, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| WORD32 shift; |
| |
| shift = SHIFT_14_MINUS_BIT_DEPTH + 1; |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i4_tmp = pi2_src1[col] + lvl_shift1; |
| i4_tmp += pi2_src2[col] + lvl_shift2; |
| i4_tmp += 1 << (shift - 1); |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp >> shift); |
| } |
| |
| pi2_src1 += src_strd1; |
| pi2_src2 += src_strd2; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_BI_DEFAULT |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Does chroma default bi-weighted prediction on arrays pointed by pi2_src1 and |
| * pi2_src2 and stores it at location pointed by pi2_dst |
| * |
| * @par Description: |
| * dst = ( (src1 + lvl_shift1) + (src2 + lvl_shift2) + 1 << (shift - 1) ) |
| * >> shift where shift = 15 - BitDepth |
| * |
| * @param[in] pi2_src1 |
| * Pointer to source 1 |
| * |
| * @param[in] pi2_src2 |
| * Pointer to source 2 |
| * |
| * @param[out] pu1_dst |
| * Pointer to destination |
| * |
| * @param[in] src_strd1 |
| * Source stride 1 |
| * |
| * @param[in] src_strd2 |
| * Source stride 2 |
| * |
| * @param[in] dst_strd |
| * Destination stride |
| * |
| * @param[in] lvl_shift1 |
| * added before shift and offset |
| * |
| * @param[in] lvl_shift2 |
| * added before shift and offset |
| * |
| * @param[in] ht |
| * height of the source |
| * |
| * @param[in] wd |
| * width of the source (each colour component) |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_weighted_pred_chroma_bi_default(WORD16 *pi2_src1, |
| WORD16 *pi2_src2, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd1, |
| WORD32 src_strd2, |
| WORD32 dst_strd, |
| WORD32 lvl_shift1, |
| WORD32 lvl_shift2, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| WORD32 i4_tmp; |
| WORD32 shift; |
| |
| shift = SHIFT_14_MINUS_BIT_DEPTH + 1; |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| i4_tmp = pi2_src1[col] + lvl_shift1; |
| i4_tmp += pi2_src2[col] + lvl_shift2; |
| i4_tmp += 1 << (shift - 1); |
| |
| pu1_dst[col] = CLIP_U8(i4_tmp >> shift); |
| } |
| |
| pi2_src1 += src_strd1; |
| pi2_src2 += src_strd2; |
| pu1_dst += dst_strd; |
| } |
| } |
| //WEIGHTED_PRED_CHROMA_BI_DEFAULT |
