| /****************************************************************************** |
| * |
| * 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 |
| * ihevcd_intra_ref_substitution.c |
| * |
| * @brief |
| * Contains ref substitution functions |
| * |
| * @author |
| * Naveen |
| * |
| * @par List of Functions: |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| /*****************************************************************************/ |
| /* File Includes */ |
| /*****************************************************************************/ |
| #include <stdio.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "ihevc_typedefs.h" |
| #include "ihevc_platform_macros.h" |
| #include "ihevc_intra_pred.h" |
| #include "ihevc_mem_fns.h" |
| #include "ihevc_chroma_intra_pred.h" |
| #include "ihevc_common_tables.h" |
| #include "ihevc_defs.h" |
| #include "ihevc_mem_fns.h" |
| #include "ihevc_macros.h" |
| |
| #define MAX_CU_SIZE 64 |
| #define BIT_DEPTH 8 |
| #define T32_4NT 128 |
| #define T16_4NT 64 |
| #define T16C_4NT 64 |
| #define T8C_4NT 32 |
| /****************************************************************************/ |
| /* Function Macros */ |
| /****************************************************************************/ |
| |
| #define GET_BIT(y,x) ((y) & (1 << x)) && (1 << x) |
| #define GET_BITS(y,x) ((y) & (1 << x)) && (1 << x) |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Reference substitution process for samples unavailable for prediction |
| * Refer to section 8.4.4.2.2 |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_top_left |
| * UWORD8 pointer to the top-left |
| * |
| * @param[in] pu1_top |
| * UWORD8 pointer to the top |
| * |
| * @param[in] pu1_left |
| * UWORD8 pointer to the left |
| * |
| * @param[in] src_strd |
| * WORD32 Source stride |
| * |
| * @param[in] nbr_flags |
| * WORD32 neighbor availability flags |
| * |
| * @param[in] nt |
| * WORD32 transform Block size |
| * |
| * @param[in] dst_strd |
| * WORD32 Destination stride |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| void ihevc_intra_pred_chroma_ref_substitution_a9q(UWORD8 *pu1_top_left, |
| UWORD8 *pu1_top, |
| UWORD8 *pu1_left, |
| WORD32 src_strd, |
| WORD32 nt, |
| WORD32 nbr_flags, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd) |
| { |
| UWORD8 pu1_ref_u, pu1_ref_v; |
| WORD32 dc_val, i, j; |
| WORD32 total_samples = (4 * nt) + 1; |
| WORD32 get_bits; |
| WORD32 next; |
| WORD32 bot_left, left, top, tp_right, tp_left; |
| WORD32 idx, nbr_id_from_bl, frwd_nbr_flag; |
| WORD32 a_nbr_flag[5]; |
| UNUSED(dst_strd); |
| /* Neighbor Flag Structure*/ |
| /* WORD32 nbr_flags MSB-->LSB TOP LEFT | TOP-RIGHT | TOP | LEFT | BOTTOM LEFT*/ |
| /* (1 bit) (4 bits) (4 bits) (4 bits) (4 bits) */ |
| |
| if(nbr_flags == 0) |
| { |
| /* If no neighbor flags are present, fill the neighbor samples with DC value */ |
| /*dc_val = 1 << (BIT_DEPTH - 1);*/ |
| dc_val = 1 << (8 - 1); |
| for(i = 0; i < (2 * total_samples); i++) |
| { |
| pu1_dst[i] = dc_val; |
| } |
| } |
| else |
| { |
| /* Else fill the corresponding samples */ |
| |
| /* Check for the neighbors availibility */ |
| tp_left = (nbr_flags & 0x10000); |
| tp_right = (nbr_flags & 0x0f000); |
| top = (nbr_flags & 0x00f00); |
| left = (nbr_flags & 0x000f0); |
| bot_left = (nbr_flags & 0x0000f); |
| |
| /* Fill nbrs depending on avalibility */ |
| /* Top -Left nbrs */ |
| if(0 != tp_left) |
| { |
| pu1_dst[(4 * nt)] = *pu1_top_left; // U top-left sample |
| pu1_dst[(4 * nt) + 1] = *(pu1_top_left + 1); // V top-left sample |
| } |
| /* Left nbrs */ |
| if(0 != left) |
| { |
| for(i = 0, j = 0; i < (2 * nt); i += 2) |
| { |
| pu1_dst[(4 * nt) - 2 - i] = pu1_left[j * src_strd]; // U left samples |
| pu1_dst[(4 * nt) - 1 - i] = pu1_left[(j * src_strd) + 1]; // V left samples |
| j++; |
| } |
| } |
| /* Bottom - Left nbrs */ |
| if(0 != bot_left) |
| { |
| for(i = (2 * nt), j = nt; i < (4 * nt); i += 2) |
| { |
| pu1_dst[(4 * nt) - 2 - i] = pu1_left[j * src_strd]; // U left samples |
| pu1_dst[(4 * nt) - 1 - i] = pu1_left[(j * src_strd) + 1]; // V left samples |
| j++; |
| } |
| } |
| /* Top nbrs */ |
| if(0 != top) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[(4 * nt) + 2], pu1_top, 2 * nt); |
| // U-V interleaved Top-top right samples |
| } |
| |
| /* Top - Right nbrs */ |
| if(0 != tp_right) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[(4 * nt) + 2 + 2 * nt], pu1_top + 2 * nt, 2 * nt); |
| // U-V interleaved Top-top right samples |
| } |
| |
| if(nt == 4) |
| { |
| /* 1 bit extraction for all the neighboring blocks */ |
| tp_left = (nbr_flags & 0x10000) >> 16; |
| bot_left = (nbr_flags & 0x8) >> 3; |
| left = (nbr_flags & 0x80) >> 7; |
| top = (nbr_flags & 0x100) >> 8; |
| tp_right = (nbr_flags & 0x1000) >> 12; |
| |
| next = 1; |
| a_nbr_flag[0] = bot_left; |
| a_nbr_flag[1] = left; |
| a_nbr_flag[2] = tp_left; |
| a_nbr_flag[3] = top; |
| a_nbr_flag[4] = tp_right; |
| |
| /* If bottom -left is not available, reverse substitution process*/ |
| if(bot_left == 0) |
| { |
| /* Check for the 1st available sample from bottom-left*/ |
| while(!a_nbr_flag[next]) |
| next++; |
| |
| /* If Left, top-left are available*/ |
| if(next <= 2) |
| { |
| UWORD16 *pu2_dst; |
| idx = (nt * next); |
| pu2_dst = (UWORD16 *)&pu1_dst[2 * idx]; |
| ihevc_memset_16bit_a9q((UWORD16 *)pu1_dst, pu2_dst[0], idx); |
| } |
| else /* If top, top-right are available */ |
| { |
| UWORD16 *pu2_dst; |
| /* Idx is changed to copy 1 pixel value for top-left ,if top-left is not available*/ |
| idx = (nt * (next - 1)) + 1; |
| pu2_dst = (UWORD16 *)&pu1_dst[2 * idx]; |
| ihevc_memset_16bit_a9q((UWORD16 *)pu1_dst, pu2_dst[0], idx); |
| } |
| } |
| |
| if(left == 0) |
| { |
| UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(2 * nt) - 2]; |
| ihevc_memset_16bit_a9q((UWORD16 *)&pu1_dst[(2 * nt)], pu2_dst[0], nt); |
| |
| |
| } |
| if(tp_left == 0) |
| { |
| pu1_dst[4 * nt] = pu1_dst[(4 * nt) - 2]; |
| pu1_dst[(4 * nt) + 1] = pu1_dst[(4 * nt) - 1]; |
| } |
| if(top == 0) |
| { |
| UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(4 * nt)]; |
| ihevc_memset_16bit_a9q((UWORD16 *)&pu1_dst[(4 * nt) + 2], pu2_dst[0], nt); |
| |
| |
| } |
| if(tp_right == 0) |
| { |
| UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(6 * nt)]; |
| ihevc_memset_16bit_a9q((UWORD16 *)&pu1_dst[(6 * nt) + 2], pu2_dst[0], nt); |
| |
| |
| } |
| } |
| else if(nt == 8) |
| { |
| WORD32 nbr_flags_temp = 0; |
| nbr_flags_temp = ((nbr_flags & 0xC) >> 2) + ((nbr_flags & 0xC0) >> 4) |
| + ((nbr_flags & 0x300) >> 4) |
| + ((nbr_flags & 0x3000) >> 6) |
| + ((nbr_flags & 0x10000) >> 8); |
| |
| /* compute trailing zeors based on nbr_flag for substitution process of below left see section .*/ |
| /* as each bit in nbr flags corresponds to 8 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| { |
| nbr_id_from_bl = look_up_trailing_zeros(nbr_flags_temp & 0XF) * 4; /* for bottom left and left */ |
| if(nbr_id_from_bl == 32) |
| nbr_id_from_bl = 16; |
| if(nbr_id_from_bl == 16) |
| { |
| /* for top left : 1 pel per nbr bit */ |
| if(!((nbr_flags_temp >> 8) & 0x1)) |
| { |
| nbr_id_from_bl++; |
| nbr_id_from_bl += look_up_trailing_zeros((nbr_flags_temp >> 4) & 0xF) * 4; /* top and top right; 8 pels per nbr bit */ |
| |
| } |
| } |
| /* Reverse Substitution Process*/ |
| if(nbr_id_from_bl) |
| { |
| /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| pu1_ref_u = pu1_dst[2 * nbr_id_from_bl]; |
| pu1_ref_v = pu1_dst[(2 * nbr_id_from_bl) + 1]; |
| for(i = 2 * (nbr_id_from_bl - 1); i >= 0; i -= 2) |
| { |
| pu1_dst[i] = pu1_ref_u; |
| pu1_dst[i + 1] = pu1_ref_v; |
| } |
| } |
| } |
| |
| /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| while(nbr_id_from_bl < ((T8C_4NT)+1)) |
| { |
| /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| /* Divide by 8 to obtain the original index */ |
| frwd_nbr_flag = (nbr_id_from_bl >> 2); /*+ (nbr_id_from_bl & 0x1);*/ |
| |
| /* The Top-left flag is at the last bit location of nbr_flags*/ |
| if(nbr_id_from_bl == (T8C_4NT / 2)) |
| { |
| get_bits = GET_BIT(nbr_flags_temp, 8); |
| |
| /* only pel substitution for TL */ |
| if(!get_bits) |
| { |
| pu1_dst[2 * nbr_id_from_bl] = pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| pu1_dst[(2 * nbr_id_from_bl) + 1] = pu1_dst[(2 * nbr_id_from_bl) - 1]; |
| } |
| } |
| else |
| { |
| get_bits = GET_BIT(nbr_flags_temp, frwd_nbr_flag); |
| if(!get_bits) |
| { |
| UWORD16 *pu2_dst; |
| /* 8 pel substitution (other than TL) */ |
| pu2_dst = (UWORD16 *)&pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| ihevc_memset_16bit_a9q((UWORD16 *)(pu1_dst + (2 * nbr_id_from_bl)), pu2_dst[0], 4); |
| } |
| |
| } |
| nbr_id_from_bl += (nbr_id_from_bl == (T8C_4NT / 2)) ? 1 : 4; |
| } |
| |
| } |
| else if(nt == 16) |
| { |
| /* compute trailing ones based on mbr_flag for substitution process of below left see section .*/ |
| /* as each bit in nbr flags corresponds to 4 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| { |
| nbr_id_from_bl = look_up_trailing_zeros((nbr_flags & 0XFF)) * 4; /* for bottom left and left */ |
| |
| if(nbr_id_from_bl == 32) |
| { |
| /* for top left : 1 pel per nbr bit */ |
| if(!((nbr_flags >> 16) & 0x1)) |
| { |
| /* top left not available */ |
| nbr_id_from_bl++; |
| /* top and top right; 4 pels per nbr bit */ |
| nbr_id_from_bl += look_up_trailing_zeros((nbr_flags >> 8) & 0xFF) * 4; |
| } |
| } |
| /* Reverse Substitution Process*/ |
| if(nbr_id_from_bl) |
| { |
| /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| pu1_ref_u = pu1_dst[2 * nbr_id_from_bl]; |
| pu1_ref_v = pu1_dst[2 * nbr_id_from_bl + 1]; |
| for(i = (2 * (nbr_id_from_bl - 1)); i >= 0; i -= 2) |
| { |
| pu1_dst[i] = pu1_ref_u; |
| pu1_dst[i + 1] = pu1_ref_v; |
| } |
| } |
| } |
| |
| /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| while(nbr_id_from_bl < ((T16C_4NT)+1)) |
| { |
| /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| /* Devide by 4 to obtain the original index */ |
| frwd_nbr_flag = (nbr_id_from_bl >> 2); /*+ (nbr_id_from_bl & 0x1);*/ |
| |
| /* The Top-left flag is at the last bit location of nbr_flags*/ |
| if(nbr_id_from_bl == (T16C_4NT / 2)) |
| { |
| get_bits = GET_BIT(nbr_flags, 16); |
| /* only pel substitution for TL */ |
| if(!get_bits) |
| { |
| pu1_dst[2 * nbr_id_from_bl] = pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| pu1_dst[(2 * nbr_id_from_bl) + 1] = pu1_dst[(2 * nbr_id_from_bl) - 1]; |
| } |
| } |
| else |
| { |
| get_bits = GET_BIT(nbr_flags, frwd_nbr_flag); |
| if(!get_bits) |
| { |
| UWORD16 *pu2_dst; |
| /* 4 pel substitution (other than TL) */ |
| pu2_dst = (UWORD16 *)&pu1_dst[(2 * nbr_id_from_bl) - 2]; |
| ihevc_memset_16bit_a9q((UWORD16 *)(pu1_dst + (2 * nbr_id_from_bl)), pu2_dst[0], 4); |
| } |
| |
| } |
| nbr_id_from_bl += (nbr_id_from_bl == (T16C_4NT / 2)) ? 1 : 4; |
| } |
| } |
| } |
| } |
| |
| |
| void ihevc_intra_pred_luma_ref_substitution_a9q(UWORD8 *pu1_top_left, |
| UWORD8 *pu1_top, |
| UWORD8 *pu1_left, |
| WORD32 src_strd, |
| WORD32 nt, |
| WORD32 nbr_flags, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd) |
| { |
| UWORD8 pu1_ref; |
| WORD32 dc_val, i; |
| WORD32 total_samples = (4 * nt) + 1; |
| WORD32 two_nt = 2 * nt; |
| |
| WORD32 three_nt = 3 * nt; |
| WORD32 get_bits; |
| WORD32 next; |
| WORD32 bot_left, left, top, tp_right, tp_left; |
| |
| WORD32 idx, nbr_id_from_bl, frwd_nbr_flag; |
| UNUSED(dst_strd); |
| /*dc_val = 1 << (BIT_DEPTH - 1);*/ |
| dc_val = 1 << (8 - 1); |
| |
| |
| /* Neighbor Flag Structure*/ |
| /* MSB ---> LSB */ |
| /* Top-Left | Top-Right | Top | Left | Bottom-Left |
| 1 4 4 4 4 |
| */ |
| /* If no neighbor flags are present, fill the neighbor samples with DC value */ |
| if(nbr_flags == 0) |
| { |
| for(i = 0; i < total_samples; i++) |
| { |
| pu1_dst[i] = dc_val; |
| } |
| } |
| else |
| { |
| if(nt <= 8) |
| { |
| /* 1 bit extraction for all the neighboring blocks */ |
| tp_left = (nbr_flags & 0x10000) >> 16; |
| bot_left = (nbr_flags & 0x8) >> 3; |
| left = (nbr_flags & 0x80) >> 7; |
| top = (nbr_flags & 0x100) >> 8; |
| tp_right = (nbr_flags & 0x1000) >> 12; |
| |
| /* Else fill the corresponding samples */ |
| if(tp_left) |
| pu1_dst[two_nt] = *pu1_top_left; |
| else |
| pu1_dst[two_nt] = 0; |
| |
| |
| if(left) |
| { |
| for(i = 0; i < nt; i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_a9q(&pu1_dst[two_nt - 1 - (nt - 1)], 0, nt); |
| } |
| |
| |
| if(bot_left) |
| { |
| for(i = nt; i < two_nt; i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_a9q(&pu1_dst[two_nt - 1 - (two_nt - 1)], 0, nt); |
| } |
| |
| |
| if(top) |
| { |
| ihevc_memcpy_a9q(&pu1_dst[two_nt + 1], pu1_top, nt); |
| } |
| else |
| { |
| ihevc_memset_a9q(&pu1_dst[two_nt + 1], 0, nt); |
| } |
| |
| if(tp_right) |
| { |
| ihevc_memcpy_a9q(&pu1_dst[two_nt + 1 + nt], pu1_top + nt, nt); |
| } |
| else |
| { |
| ihevc_memset_a9q(&pu1_dst[two_nt + 1 + nt], 0, nt); |
| } |
| next = 1; |
| |
| /* If bottom -left is not available, reverse substitution process*/ |
| if(bot_left == 0) |
| { |
| WORD32 a_nbr_flag[5]; |
| a_nbr_flag[0] = bot_left; |
| a_nbr_flag[1] = left; |
| a_nbr_flag[2] = tp_left; |
| a_nbr_flag[3] = top; |
| a_nbr_flag[4] = tp_right; |
| |
| /* Check for the 1st available sample from bottom-left*/ |
| while(!a_nbr_flag[next]) |
| next++; |
| |
| /* If Left, top-left are available*/ |
| if(next <= 2) |
| { |
| idx = nt * next; |
| pu1_ref = pu1_dst[idx]; |
| for(i = 0; i < idx; i++) |
| pu1_dst[i] = pu1_ref; |
| } |
| else /* If top, top-right are available */ |
| { |
| /* Idx is changed to copy 1 pixel value for top-left ,if top-left is not available*/ |
| idx = (nt * (next - 1)) + 1; |
| pu1_ref = pu1_dst[idx]; |
| for(i = 0; i < idx; i++) |
| pu1_dst[i] = pu1_ref; |
| } |
| } |
| |
| /* Forward Substitution Process */ |
| /* If left is Unavailable, copy the last bottom-left value */ |
| if(left == 0) |
| { |
| ihevc_memset_a9q(&pu1_dst[nt], pu1_dst[nt - 1], nt); |
| |
| } |
| /* If top-left is Unavailable, copy the last left value */ |
| if(tp_left == 0) |
| pu1_dst[two_nt] = pu1_dst[two_nt - 1]; |
| /* If top is Unavailable, copy the last top-left value */ |
| if(top == 0) |
| { |
| ihevc_memset_a9q(&pu1_dst[two_nt + 1], pu1_dst[two_nt], nt); |
| } |
| /* If to right is Unavailable, copy the last top value */ |
| if(tp_right == 0) |
| { |
| ihevc_memset_a9q(&pu1_dst[three_nt + 1], pu1_dst[three_nt], nt); |
| |
| } |
| } |
| |
| if(nt == 16) |
| { |
| WORD32 nbr_flags_temp = 0; |
| nbr_flags_temp = ((nbr_flags & 0xC) >> 2) + ((nbr_flags & 0xC0) >> 4) |
| + ((nbr_flags & 0x300) >> 4) |
| + ((nbr_flags & 0x3000) >> 6) |
| + ((nbr_flags & 0x10000) >> 8); |
| |
| /* Else fill the corresponding samples */ |
| if(nbr_flags & 0x10000) |
| pu1_dst[two_nt] = *pu1_top_left; |
| else |
| pu1_dst[two_nt] = 0; |
| |
| if(nbr_flags & 0xC0) |
| { |
| for(i = 0; i < nt; i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt - 1 - (nt - 1)], 0, nt); |
| } |
| |
| /* Bottom - left availability is checked for every 8x8 TU position and set accordingly */ |
| { |
| if(nbr_flags & 0x8) |
| { |
| for(i = nt; i < (nt + 8); i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[nt - 8], 0, 8); |
| } |
| |
| if(nbr_flags & 0x4) |
| { |
| for(i = (nt + 8); i < two_nt; i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[0], 0, 8); |
| } |
| } |
| |
| |
| if(nbr_flags & 0x300) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[two_nt + 1], pu1_top, nt); |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt + 1], 0, nt); |
| } |
| |
| if(nbr_flags & 0x3000) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[two_nt + 1 + nt], pu1_top + nt, nt); |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt + 1 + nt], 0, nt); |
| } |
| /* compute trailing zeors based on nbr_flag for substitution process of below left see section .*/ |
| /* as each bit in nbr flags corresponds to 8 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| { |
| nbr_id_from_bl = look_up_trailing_zeros(nbr_flags_temp & 0XF) * 8; /* for below left and left */ |
| |
| if(nbr_id_from_bl == 64) |
| nbr_id_from_bl = 32; |
| |
| if(nbr_id_from_bl == 32) |
| { |
| /* for top left : 1 pel per nbr bit */ |
| if(!((nbr_flags_temp >> 8) & 0x1)) |
| { |
| nbr_id_from_bl++; |
| nbr_id_from_bl += look_up_trailing_zeros((nbr_flags_temp >> 4) & 0xF) * 8; /* top and top right; 8 pels per nbr bit */ |
| //nbr_id_from_bl += idx * 8; |
| } |
| } |
| /* Reverse Substitution Process*/ |
| if(nbr_id_from_bl) |
| { |
| /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| pu1_ref = pu1_dst[nbr_id_from_bl]; |
| for(i = (nbr_id_from_bl - 1); i >= 0; i--) |
| { |
| pu1_dst[i] = pu1_ref; |
| } |
| } |
| } |
| |
| /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| while(nbr_id_from_bl < ((T16_4NT) + 1)) |
| { |
| /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| /* Devide by 8 to obtain the original index */ |
| frwd_nbr_flag = (nbr_id_from_bl >> 3); /*+ (nbr_id_from_bl & 0x1);*/ |
| |
| /* The Top-left flag is at the last bit location of nbr_flags*/ |
| if(nbr_id_from_bl == (T16_4NT / 2)) |
| { |
| get_bits = GET_BITS(nbr_flags_temp, 8); |
| |
| /* only pel substitution for TL */ |
| if(!get_bits) |
| pu1_dst[nbr_id_from_bl] = pu1_dst[nbr_id_from_bl - 1]; |
| } |
| else |
| { |
| get_bits = GET_BITS(nbr_flags_temp, frwd_nbr_flag); |
| if(!get_bits) |
| { |
| /* 8 pel substitution (other than TL) */ |
| pu1_ref = pu1_dst[nbr_id_from_bl - 1]; |
| ihevc_memset_mul_8_a9q(pu1_dst + nbr_id_from_bl, pu1_ref, 8); |
| |
| |
| } |
| |
| } |
| nbr_id_from_bl += (nbr_id_from_bl == (T16_4NT / 2)) ? 1 : 8; |
| } |
| |
| |
| } |
| |
| if(nt == 32) |
| { |
| /* Else fill the corresponding samples */ |
| if(nbr_flags & 0x10000) |
| pu1_dst[two_nt] = *pu1_top_left; |
| else |
| pu1_dst[two_nt] = 0; |
| |
| if(nbr_flags & 0xF0) |
| { |
| for(i = 0; i < nt; i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt - 1 - (nt - 1)], 0, nt); |
| } |
| |
| /* Bottom - left availability is checked for every 8x8 TU position and set accordingly */ |
| { |
| if(nbr_flags & 0x8) |
| { |
| for(i = nt; i < (nt + 8); i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[24], 0, 8); |
| } |
| |
| if(nbr_flags & 0x4) |
| { |
| for(i = (nt + 8); i < (nt + 16); i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[16], 0, 8); |
| } |
| |
| if(nbr_flags & 0x2) |
| { |
| for(i = (nt + 16); i < (nt + 24); i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[8], 0, 8); |
| } |
| |
| if(nbr_flags & 0x1) |
| { |
| for(i = (nt + 24); i < (two_nt); i++) |
| pu1_dst[two_nt - 1 - i] = pu1_left[i * src_strd]; |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[0], 0, 8); |
| } |
| } |
| |
| if(nbr_flags & 0xF00) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[two_nt + 1], pu1_top, nt); |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt + 1], 0, nt); |
| } |
| |
| if(nbr_flags & 0xF000) |
| { |
| ihevc_memcpy_mul_8_a9q(&pu1_dst[two_nt + 1 + nt], pu1_top + nt, nt); |
| } |
| else |
| { |
| ihevc_memset_mul_8_a9q(&pu1_dst[two_nt + 1 + nt], 0, nt); |
| } |
| /* compute trailing ones based on mbr_flag for substitution process of below left see section .*/ |
| /* as each bit in nbr flags corresponds to 8 pels for bot_left, left, top and topright but 1 pel for topleft */ |
| { |
| nbr_id_from_bl = look_up_trailing_zeros((nbr_flags & 0XFF)) * 8; /* for below left and left */ |
| |
| if(nbr_id_from_bl == 64) |
| { |
| /* for top left : 1 pel per nbr bit */ |
| if(!((nbr_flags >> 16) & 0x1)) |
| { |
| /* top left not available */ |
| nbr_id_from_bl++; |
| /* top and top right; 8 pels per nbr bit */ |
| nbr_id_from_bl += look_up_trailing_zeros((nbr_flags >> 8) & 0xFF) * 8; |
| } |
| } |
| /* Reverse Substitution Process*/ |
| if(nbr_id_from_bl) |
| { |
| /* Replicate the bottom-left and subsequent unavailable pixels with the 1st available pixel above */ |
| pu1_ref = pu1_dst[nbr_id_from_bl]; |
| for(i = (nbr_id_from_bl - 1); i >= 0; i--) |
| pu1_dst[i] = pu1_ref; |
| } |
| } |
| |
| /* for the loop of 4*Nt+1 pixels (excluding pixels computed from reverse substitution) */ |
| while(nbr_id_from_bl < ((T32_4NT) + 1)) |
| { |
| /* To Obtain the next unavailable idx flag after reverse neighbor substitution */ |
| /* Devide by 8 to obtain the original index */ |
| frwd_nbr_flag = (nbr_id_from_bl >> 3); /*+ (nbr_id_from_bl & 0x1);*/ |
| |
| /* The Top-left flag is at the last bit location of nbr_flags*/ |
| if(nbr_id_from_bl == (T32_4NT / 2)) |
| { |
| get_bits = GET_BITS(nbr_flags, 16); |
| /* only pel substitution for TL */ |
| if(!get_bits) |
| pu1_dst[nbr_id_from_bl] = pu1_dst[nbr_id_from_bl - 1]; |
| } |
| else |
| { |
| get_bits = GET_BITS(nbr_flags, frwd_nbr_flag); |
| if(!get_bits) |
| { |
| /* 8 pel substitution (other than TL) */ |
| pu1_ref = pu1_dst[nbr_id_from_bl - 1]; |
| ihevc_memset_mul_8_a9q(&pu1_dst[nbr_id_from_bl], pu1_ref, 8); |
| |
| } |
| |
| } |
| nbr_id_from_bl += (nbr_id_from_bl == (T32_4NT / 2)) ? 1 : 8; |
| } |
| } |
| |
| } |
| } |
