| /****************************************************************************** |
| * |
| * 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_inter_pred_filters.c |
| * |
| * @brief |
| * Contains function definitions for inter prediction interpolation filters |
| * |
| * |
| * @author |
| * Srinivas T |
| * |
| * @par List of Functions: |
| * - ihevc_inter_pred_luma_copy() |
| * - ihevc_inter_pred_luma_horz() |
| * - ihevc_inter_pred_luma_vert() |
| * - ihevc_inter_pred_luma_copy_w16out() |
| * - ihevc_inter_pred_luma_horz_w16out() |
| * - ihevc_inter_pred_luma_vert_w16out() |
| * - ihevc_inter_pred_luma_vert_w16inp() |
| * - ihevc_inter_pred_luma_vert_w16inp_w16out() |
| * - ihevc_inter_pred_chroma_copy() |
| * - ihevc_inter_pred_chroma_horz() |
| * - ihevc_inter_pred_chroma_vert() |
| * - ihevc_inter_pred_chroma_copy_w16out() |
| * - ihevc_inter_pred_chroma_horz_w16out() |
| * - ihevc_inter_pred_chroma_vert_w16out() |
| * - ihevc_inter_pred_chroma_vert_w16inp() |
| * - ihevc_inter_pred_chroma_vert_w16inp_w16out() |
| * |
| * @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" |
| /*****************************************************************************/ |
| /* Function Definitions */ |
| /*****************************************************************************/ |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma function for copy |
| * |
| * @par Description: |
| * Copies the array of width 'wd' and height 'ht' from the location pointed |
| * by 'src' to the location pointed by 'dst' |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_copy(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| UNUSED(pi1_coeff); |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| pu1_dst[col] = pu1_src[col]; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma filter for horizontal input |
| * |
| * @par Description: |
| * Applies a horizontal filter with coefficients pointed to by 'pi1_coeff' |
| * to the elements pointed by 'pu1_src' and writes to the location pointed |
| * by 'pu1_dst' The output is downshifted by 6 and clipped to 8 bits |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_inter_pred_luma_horz(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 3)]; |
| |
| i2_tmp = (i2_tmp + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i2_tmp = CLIP_U8(i2_tmp); |
| |
| pu1_dst[col] = (UWORD8)i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma filter for vertical input |
| * |
| * @par Description: |
| * Applies a vertcal filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' The output is downshifted by 6 and clipped to 8 bits |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_vert(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 3) * src_strd]; |
| |
| i2_tmp = (i2_tmp + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i2_tmp = CLIP_U8(i2_tmp); |
| |
| pu1_dst[col] = (UWORD8)i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma filter for copy 16bit output |
| * |
| * @par Description: |
| * Copies the array of width 'wd' and height 'ht' from the location pointed |
| * by 'src' to the location pointed by 'dst' The output is upshifted by 6 |
| * bits and is used as input for vertical filtering or weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_copy_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| UNUSED(pi1_coeff); |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| pi2_dst[col] = (pu1_src[col] << SHIFT_14_MINUS_BIT_DEPTH); |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma filter for horizontal 16bit output |
| * |
| * @par Description: |
| * Applies a horizontal filter with coefficients pointed to by 'pi1_coeff' |
| * to the elements pointed by 'pu1_src' and writes to the location pointed |
| * by 'pu1_dst' No downshifting or clipping is done and the output is used |
| * as an input for vertical filtering or weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_horz_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 3)]; |
| |
| pi2_dst[col] = i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction luma filter for vertical 16bit output |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' No downshifting or clipping is done and the output is used as |
| * an input for weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_vert_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 3) * src_strd]; |
| |
| pi2_dst[col] = i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * |
| * Luma vertical filter for 16bit input. |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' Input is 16 bits The filter output is downshifted by 12 and |
| * clipped to lie between 0 and 255 |
| * |
| * @param[in] pi2_src |
| * WORD16 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_inter_pred_luma_vert_w16inp(WORD16 *pi2_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i4_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i4_tmp += pi1_coeff[i] * pi2_src[col + (i - 3) * src_strd]; |
| |
| i4_tmp = ((i4_tmp >> SHIFT_14_MINUS_BIT_DEPTH) + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i4_tmp = CLIP_U8(i4_tmp); |
| |
| pu1_dst[col] = i4_tmp; |
| } |
| |
| pi2_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Luma prediction filter for vertical 16bit input & output |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' Input is 16 bits The filter output is downshifted by 6 and |
| * 8192 is subtracted to store it as a 16 bit number The output is used as |
| * a input to weighted prediction |
| * |
| * @param[in] pi2_src |
| * WORD16 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_luma_vert_w16inp_w16out(WORD16 *pi2_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < wd; col++) |
| { |
| i4_tmp = 0; |
| for(i = 0; i < NTAPS_LUMA; i++) |
| i4_tmp += pi1_coeff[i] * pi2_src[col + (i - 3) * src_strd]; |
| |
| i4_tmp = (i4_tmp >> SHIFT_14_MINUS_BIT_DEPTH) - OFFSET14; |
| |
| pi2_dst[col] = i4_tmp; |
| } |
| |
| pi2_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Chroma interprediction filter for copy |
| * |
| * @par Description: |
| * Copies the array of width 'wd' and height 'ht' from the location pointed |
| * by 'src' to the location pointed by 'dst' |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_copy(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| UNUSED(pi1_coeff); |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| pu1_dst[col] = pu1_src[col]; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Chroma interprediction filter for horizontal input |
| * |
| * @par Description: |
| * Applies a horizontal filter with coefficients pointed to by 'pi1_coeff' |
| * to the elements pointed by 'pu1_src' and writes to the location pointed |
| * by 'pu1_dst' The output is downshifted by 6 and clipped to 8 bits |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_horz(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp_u, i2_tmp_v; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col += 2) |
| { |
| i2_tmp_u = 0; |
| i2_tmp_v = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i2_tmp_u += pi1_coeff[i] * pu1_src[col + (i - 1) * 2]; |
| i2_tmp_v += pi1_coeff[i] * pu1_src[col + 1 + (i - 1) * 2]; |
| } |
| |
| i2_tmp_u = (i2_tmp_u + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i2_tmp_u = CLIP_U8(i2_tmp_u); |
| i2_tmp_v = (i2_tmp_v + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i2_tmp_v = CLIP_U8(i2_tmp_v); |
| |
| |
| pu1_dst[col] = (UWORD8)i2_tmp_u; |
| pu1_dst[col + 1] = (UWORD8)i2_tmp_v; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Chroma interprediction filter for vertical input |
| * |
| * @par Description: |
| * Applies a vertcal filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' The output is downshifted by 6 and clipped to 8 bits |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_vert(UWORD8 *pu1_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 1) * src_strd]; |
| } |
| |
| i2_tmp = (i2_tmp + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i2_tmp = CLIP_U8(i2_tmp); |
| |
| pu1_dst[col] = (UWORD8)i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * chroma interprediction filter for copying 16bit output |
| * |
| * @par Description: |
| * Copies the array of width 'wd' and height 'ht' from the location pointed |
| * by 'src' to the location pointed by 'dst' The output is upshifted by 6 |
| * bits and is used as input for vertical filtering or weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_copy_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col; |
| UNUSED(pi1_coeff); |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| pi2_dst[col] = (pu1_src[col] << SHIFT_14_MINUS_BIT_DEPTH); |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * chroma interprediction filter to store horizontal 16bit ouput |
| * |
| * @par Description: |
| * Applies a horizontal filter with coefficients pointed to by 'pi1_coeff' |
| * to the elements pointed by 'pu1_src' and writes to the location pointed |
| * by 'pu1_dst' No downshifting or clipping is done and the output is used |
| * as an input for vertical filtering or weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_horz_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp_u, i2_tmp_v; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col += 2) |
| { |
| i2_tmp_u = 0; |
| i2_tmp_v = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i2_tmp_u += pi1_coeff[i] * pu1_src[col + (i - 1) * 2]; |
| i2_tmp_v += pi1_coeff[i] * pu1_src[col + 1 + (i - 1) * 2]; |
| } |
| |
| pi2_dst[col] = i2_tmp_u; |
| pi2_dst[col + 1] = i2_tmp_v; |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Interprediction chroma filter to store vertical 16bit ouput |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' No downshifting or clipping is done and the output is used as |
| * an input for weighted prediction |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_inter_pred_chroma_vert_w16out(UWORD8 *pu1_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD16 i2_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| i2_tmp = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i2_tmp += pi1_coeff[i] * pu1_src[col + (i - 1) * src_strd]; |
| } |
| |
| pi2_dst[col] = i2_tmp; |
| } |
| |
| pu1_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * chroma interprediction filter for vertical 16bit input |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' Input is 16 bits The filter output is downshifted by 12 and |
| * clipped to lie between 0 and 255 |
| * |
| * @param[in] pi2_src |
| * WORD16 pointer to the source |
| * |
| * @param[out] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_inter_pred_chroma_vert_w16inp(WORD16 *pi2_src, |
| UWORD8 *pu1_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| i4_tmp = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i4_tmp += pi1_coeff[i] * pi2_src[col + (i - 1) * src_strd]; |
| } |
| |
| i4_tmp = ((i4_tmp >> SHIFT_14_MINUS_BIT_DEPTH) + OFFSET_14_MINUS_BIT_DEPTH) >> SHIFT_14_MINUS_BIT_DEPTH; |
| i4_tmp = CLIP_U8(i4_tmp); |
| |
| pu1_dst[col] = i4_tmp; |
| } |
| |
| pi2_src += src_strd; |
| pu1_dst += dst_strd; |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * |
| * Chroma interprediction filter for 16bit vertical input and output. |
| * |
| * @par Description: |
| * Applies a vertical filter with coefficients pointed to by 'pi1_coeff' to |
| * the elements pointed by 'pu1_src' and writes to the location pointed by |
| * 'pu1_dst' Input is 16 bits The filter output is downshifted by 6 and |
| * 8192 is subtracted to store it as a 16 bit number The output is used as |
| * a input to weighted prediction |
| * |
| * @param[in] pi2_src |
| * WORD16 pointer to the source |
| * |
| * @param[out] pi2_dst |
| * WORD16 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] pi1_coeff |
| * WORD8 pointer to the filter coefficients |
| * |
| * @param[in] ht |
| * integer height of the array |
| * |
| * @param[in] wd |
| * integer width of the array |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_inter_pred_chroma_vert_w16inp_w16out(WORD16 *pi2_src, |
| WORD16 *pi2_dst, |
| WORD32 src_strd, |
| WORD32 dst_strd, |
| WORD8 *pi1_coeff, |
| WORD32 ht, |
| WORD32 wd) |
| { |
| WORD32 row, col, i; |
| WORD32 i4_tmp; |
| |
| for(row = 0; row < ht; row++) |
| { |
| for(col = 0; col < 2 * wd; col++) |
| { |
| i4_tmp = 0; |
| for(i = 0; i < NTAPS_CHROMA; i++) |
| { |
| i4_tmp += pi1_coeff[i] * pi2_src[col + (i - 1) * src_strd]; |
| } |
| |
| i4_tmp = (i4_tmp >> SHIFT_14_MINUS_BIT_DEPTH); |
| |
| pi2_dst[col] = i4_tmp; |
| } |
| |
| pi2_src += src_strd; |
| pi2_dst += dst_strd; |
| } |
| |
| } |
| |
| |
