| /****************************************************************************** |
| * |
| * 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_chroma_intra_pred_filters.c |
| * |
| * @brief |
| * Contains function Definition for intra prediction interpolation filters |
| * |
| * |
| * @author |
| * Ittiam |
| * |
| * @par List of Functions: |
| * ihevc_intra_pred_chroma_planar() |
| * |
| * ihevc_intra_pred_chroma_dc() |
| * |
| * ihevc_intra_pred_chroma_horz() |
| * |
| * ihevc_intra_pred_chroma_ver() |
| * |
| * ihevc_intra_pred_chroma_mode2() |
| * |
| * ihevc_intra_pred_chroma_mode_18_34() |
| * |
| * ihevc_intra_pred_chroma_mode_3_to_9() |
| * |
| * ihevc_intra_pred_chroma_mode_11_to_17() |
| * |
| * ihevc_intra_pred_chroma_mode_19_to_25() |
| * |
| * ihevc_intra_pred_chroma_mode_27_to_33() |
| * |
| * ihevc_intra_pred_chroma_ref_substitution() |
| * |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| /*****************************************************************************/ |
| /* File Includes */ |
| /*****************************************************************************/ |
| |
| #include "ihevc_typedefs.h" |
| #include "ihevc_macros.h" |
| #include "ihevc_func_selector.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" |
| |
| |
| /****************************************************************************/ |
| /* Constant Macros */ |
| /****************************************************************************/ |
| #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) |
| |
| |
| /*****************************************************************************/ |
| /* Function Definition */ |
| /*****************************************************************************/ |
| |
| /** |
| ******************************************************************************* |
| * |
| * @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(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(&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(&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((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((UWORD16 *)pu1_dst, pu2_dst[0], idx); |
| } |
| } |
| |
| if(left == 0) |
| { |
| UWORD16 *pu2_dst = (UWORD16 *)&pu1_dst[(2 * nt) - 2]; |
| ihevc_memset_16bit((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((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((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((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((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; |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Planar Intraprediction with reference neighboring samples location |
| * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| * to section 8.4.4.2.4 in the standard |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_planar(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| |
| WORD32 row, col; |
| WORD32 log2nt = 5; |
| WORD32 two_nt, three_nt; |
| UNUSED(src_strd); |
| UNUSED(mode); |
| switch(nt) |
| { |
| case 16: |
| log2nt = 4; |
| break; |
| case 8: |
| log2nt = 3; |
| break; |
| case 4: |
| log2nt = 2; |
| break; |
| default: |
| break; |
| } |
| two_nt = 2 * nt; |
| three_nt = 3 * nt; |
| /* Planar filtering */ |
| for(row = 0; row < nt; row++) |
| { |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pu1_dst[row * dst_strd + col] = ((nt - 1 - col / 2) |
| * pu1_ref[2 * (two_nt - 1 - row)] |
| + (col / 2 + 1) * pu1_ref[2 * (three_nt + 1)] |
| + (nt - 1 - row) * pu1_ref[2 * (two_nt + 1) + col] |
| + (row + 1) * pu1_ref[2 * (nt - 1)] + nt) >> (log2nt + 1); |
| |
| pu1_dst[row * dst_strd + col + 1] = ((nt - 1 - col / 2) |
| * pu1_ref[2 * (two_nt - 1 - row) + 1] |
| + (col / 2 + 1) * pu1_ref[2 * (three_nt + 1) + 1] |
| + (nt - 1 - row) * pu1_ref[2 * (two_nt + 1) + col + 1] |
| + (row + 1) * pu1_ref[2 * (nt - 1) + 1] + nt) >> (log2nt + 1); |
| } |
| } |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for DC mode with reference neighboring samples location |
| * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| * to section 8.4.4.2.5 in the standard |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size (Chroma) |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_dc(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| |
| WORD32 acc_dc_u, acc_dc_v; |
| WORD32 dc_val_u, dc_val_v; |
| WORD32 i; |
| WORD32 row, col; |
| WORD32 log2nt = 5; |
| UNUSED(mode); |
| UNUSED(src_strd); |
| switch(nt) |
| { |
| case 32: |
| log2nt = 5; |
| break; |
| case 16: |
| log2nt = 4; |
| break; |
| case 8: |
| log2nt = 3; |
| break; |
| case 4: |
| log2nt = 2; |
| break; |
| default: |
| break; |
| } |
| |
| |
| acc_dc_u = 0; |
| acc_dc_v = 0; |
| /* Calculate DC value for the transform block */ |
| for(i = (2 * nt); i < (4 * nt); i += 2) |
| { |
| acc_dc_u += pu1_ref[i]; |
| acc_dc_v += pu1_ref[i + 1]; |
| } |
| for(i = ((4 * nt) + 2); i < ((6 * nt) + 2); i += 2) |
| { |
| acc_dc_u += pu1_ref[i]; |
| acc_dc_v += pu1_ref[i + 1]; |
| } |
| |
| |
| dc_val_u = (acc_dc_u + nt) >> (log2nt + 1); |
| dc_val_v = (acc_dc_v + nt) >> (log2nt + 1); |
| |
| |
| /* Fill the remaining rows with DC value*/ |
| for(row = 0; row < nt; row++) |
| { |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pu1_dst[(row * dst_strd) + col] = dc_val_u; |
| pu1_dst[(row * dst_strd) + col + 1] = dc_val_v; |
| } |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Horizontal intraprediction(mode 10) with reference samples location |
| * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| * to section 8.4.4.2.6 in the standard (Special case) |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_horz(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| |
| WORD32 row, col; |
| UNUSED(mode); |
| UNUSED(src_strd); |
| /* Replication to next rows*/ |
| for(row = 0; row < nt; row++) |
| { |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pu1_dst[(row * dst_strd) + col] = pu1_ref[(4 * nt) - 2 - 2 * row]; |
| pu1_dst[(row * dst_strd) + col + 1] = pu1_ref[(4 * nt) - 1 - 2 * row]; |
| } |
| } |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Horizontal intraprediction with reference neighboring samples location |
| * pointed by 'pu1_ref' to the TU block location pointed by 'pu1_dst' Refer |
| * to section 8.4.4.2.6 in the standard (Special case) |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_ver(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| WORD32 row, col; |
| UNUSED(mode); |
| UNUSED(src_strd); |
| /* Replication to next columns*/ |
| for(row = 0; row < nt; row++) |
| { |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pu1_dst[(row * dst_strd) + col] = pu1_ref[(4 * nt) + 2 + col]; |
| pu1_dst[(row * dst_strd) + col + 1] = pu1_ref[(4 * nt) + 3 + col]; |
| } |
| } |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 2 (sw angle) with reference neighboring samples |
| * location pointed by 'pu1_ref' to the TU block location pointed by |
| * 'pu1_dst' Refer to section 8.4.4.2.6 in the standard |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode2(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| WORD32 row, col; |
| |
| WORD32 intra_pred_ang = 32; |
| WORD32 idx_u, idx_v; |
| UNUSED(src_strd); |
| UNUSED(mode); |
| /* For the angle 45, replication is done from the corresponding angle */ |
| /* intra_pred_ang = tan(angle) in q5 format */ |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| idx_u = ((col + 1) * intra_pred_ang) >> 5; /* Use idx++ */ |
| idx_v = (((col + 1) + 1) * intra_pred_ang) >> 5; /* Use idx++ */ |
| for(row = 0; row < nt; row++) |
| { |
| pu1_dst[col + (row * dst_strd)] = pu1_ref[(4 * nt) - 2 * row - idx_u - 3]; |
| pu1_dst[(col + 1) + (row * dst_strd)] = pu1_ref[(4 * nt) - 2 * row - idx_v - 1]; |
| } |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 34 (ne angle) and mode 18 (nw angle) with |
| * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| * block location pointed by 'pu1_dst' |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode_18_34(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| WORD32 row, col; |
| WORD32 intra_pred_ang; |
| WORD32 idx = 0; |
| UNUSED(src_strd); |
| intra_pred_ang = 32; /*Default value*/ |
| /* For mode 18, angle is -45degree */ |
| if(mode == 18) |
| intra_pred_ang = -32; |
| /* For mode 34, angle is 45degree */ |
| else if(mode == 34) |
| intra_pred_ang = 32; |
| /* For the angle 45 and -45, replication is done from the corresponding angle */ |
| /* No interpolation is done for 45 degree*/ |
| for(row = 0; row < nt; row++) |
| { |
| idx = ((row + 1) * intra_pred_ang) >> 5; |
| |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pu1_dst[col + (row * dst_strd)] = pu1_ref[(4 * nt) + col + 2 * idx + 2]; |
| pu1_dst[(col + 1) + (row * dst_strd)] = pu1_ref[(4 * nt) + (col + 1) + 2 * idx + 2]; |
| } |
| |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 3 to 9 (positive angle, horizontal mode ) with |
| * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| * block location pointed by 'pu1_dst' |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode_3_to_9(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| WORD32 row, col; |
| |
| WORD32 intra_pred_ang; |
| WORD32 idx_u, ref_main_idx_u; |
| WORD32 idx_v, ref_main_idx_v; |
| WORD32 pos_u, fract_u; |
| WORD32 pos_v, fract_v; |
| UNUSED(src_strd); |
| /* Intra Pred Angle according to the mode */ |
| intra_pred_ang = gai4_ihevc_ang_table[mode]; |
| |
| /* For the angles other then 45 degree, interpolation btw 2 neighboring */ |
| /* samples dependent on distance to obtain destination sample */ |
| |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pos_u = ((col / 2 + 1) * intra_pred_ang); |
| pos_v = ((col / 2 + 1) * intra_pred_ang); |
| |
| idx_u = pos_u >> 5; |
| fract_u = pos_u & (31); |
| |
| idx_v = pos_v >> 5; |
| fract_v = pos_v & (31); |
| // Do linear filtering |
| for(row = 0; row < nt; row++) |
| { |
| ref_main_idx_u = (4 * nt) - 2 * row - 2 * idx_u - 2; |
| ref_main_idx_v = (4 * nt) - 2 * row - 2 * idx_v - 1; |
| |
| pu1_dst[col + (row * dst_strd)] = (((32 - fract_u) |
| * pu1_ref[ref_main_idx_u] |
| + fract_u * pu1_ref[ref_main_idx_u - 2] + 16) >> 5); |
| |
| pu1_dst[(col + 1) + (row * dst_strd)] = (((32 - fract_v) |
| * pu1_ref[ref_main_idx_v] |
| + fract_v * pu1_ref[ref_main_idx_v - 2] + 16) >> 5); |
| } |
| |
| } |
| |
| } |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 11 to 17 (negative angle, horizontal mode ) |
| * with reference neighboring samples location pointed by 'pu1_ref' to the |
| * TU block location pointed by 'pu1_dst' |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode_11_to_17(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| /* This function and ihevc_intra_pred_CHROMA_mode_19_to_25 are same except*/ |
| /* for ref main & side samples assignment,can be combined for */ |
| /* optimzation*/ |
| |
| WORD32 row, col, k; |
| WORD32 intra_pred_ang, inv_ang, inv_ang_sum; |
| WORD32 idx_u, idx_v, ref_main_idx_u, ref_main_idx_v, ref_idx; |
| WORD32 pos_u, pos_v, fract_u, fract_v; |
| |
| UWORD8 ref_temp[2 * MAX_CU_SIZE + 2]; |
| UWORD8 *ref_main; |
| UNUSED(src_strd); |
| inv_ang_sum = 128; |
| |
| intra_pred_ang = gai4_ihevc_ang_table[mode]; |
| |
| inv_ang = gai4_ihevc_inv_ang_table[mode - 11]; |
| /* Intermediate reference samples for negative angle modes */ |
| /* This have to be removed during optimization*/ |
| |
| /* For horizontal modes, (ref main = ref left) (ref side = ref above) */ |
| |
| |
| ref_main = ref_temp + 2 * nt; |
| for(k = 0; k < (2 * (nt + 1)); k += 2) |
| { |
| ref_temp[k + (2 * (nt - 1))] = pu1_ref[(4 * nt) - k]; |
| ref_temp[k + 1 + (2 * (nt - 1))] = pu1_ref[(4 * nt) - k + 1]; |
| } |
| |
| ref_main = ref_temp + (2 * (nt - 1)); |
| ref_idx = (nt * intra_pred_ang) >> 5; |
| |
| /* SIMD Optimization can be done using look-up table for the loop */ |
| /* For negative angled derive the main reference samples from side */ |
| /* reference samples refer to section 8.4.4.2.6 */ |
| for(k = -2; k > (2 * ref_idx); k -= 2) |
| { |
| inv_ang_sum += inv_ang; |
| ref_main[k] = pu1_ref[(4 * nt) + ((inv_ang_sum >> 8) << 1)]; |
| ref_main[k + 1] = pu1_ref[((4 * nt) + 1) + ((inv_ang_sum >> 8) << 1)]; |
| } |
| |
| /* For the angles other then 45 degree, interpolation btw 2 neighboring */ |
| /* samples dependent on distance to obtain destination sample */ |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| pos_u = ((col / 2 + 1) * intra_pred_ang); |
| pos_v = ((col / 2 + 1) * intra_pred_ang); |
| idx_u = pos_u >> 5; |
| idx_v = pos_v >> 5; |
| fract_u = pos_u & (31); |
| fract_v = pos_v & (31); |
| |
| // Do linear filtering |
| for(row = 0; row < nt; row++) |
| { |
| ref_main_idx_u = 2 * (row + idx_u + 1); |
| ref_main_idx_v = 2 * (row + idx_v + 1) + 1; |
| |
| pu1_dst[col + (dst_strd * row)] = (UWORD8)(((32 - fract_u) |
| * ref_main[ref_main_idx_u] |
| + fract_u * ref_main[ref_main_idx_u + 2] + 16) >> 5); |
| pu1_dst[(col + 1) + (dst_strd * row)] = (UWORD8)(((32 - fract_v) |
| * ref_main[ref_main_idx_v] |
| + fract_v * ref_main[ref_main_idx_v + 2] + 16) >> 5); |
| |
| } |
| |
| } |
| |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 19 to 25 (negative angle, vertical mode ) with |
| * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| * block location pointed by 'pu1_dst' |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode_19_to_25(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| |
| WORD32 row, col, k; |
| WORD32 intra_pred_ang, idx; |
| WORD32 inv_ang, inv_ang_sum, pos, fract; |
| WORD32 ref_main_idx_u, ref_main_idx_v, ref_idx; |
| UWORD8 ref_temp[(2 * MAX_CU_SIZE) + 2]; |
| UWORD8 *ref_main; |
| UNUSED(src_strd); |
| |
| |
| intra_pred_ang = gai4_ihevc_ang_table_chroma[mode]; |
| inv_ang = gai4_ihevc_inv_ang_table_chroma[mode - 12]; |
| |
| /* Intermediate reference samples for negative angle modes */ |
| /* This have to be removed during optimization*/ |
| /* For horizontal modes, (ref main = ref above) (ref side = ref left) */ |
| ref_main = ref_temp + 2 * nt; |
| for(k = 0; k < (2 * (nt + 1)); k += 2) |
| { |
| ref_temp[k + (2 * (nt - 1))] = pu1_ref[(4 * nt) + k]; |
| ref_temp[k + 1 + (2 * (nt - 1))] = pu1_ref[(4 * nt) + k + 1]; |
| } |
| |
| |
| ref_idx = (nt * intra_pred_ang) >> 5; |
| inv_ang_sum = 128; |
| ref_main = ref_temp + (2 * (nt - 1)); |
| /* SIMD Optimization can be done using look-up table for the loop */ |
| /* For negative angled derive the main reference samples from side */ |
| /* reference samples refer to section 8.4.4.2.6 */ |
| for(k = -2; k > (2 * ref_idx); k -= 2) |
| { |
| inv_ang_sum += inv_ang; |
| ref_main[k] = pu1_ref[(4 * nt) - (inv_ang_sum >> 8) * 2]; |
| ref_main[k + 1] = pu1_ref[((4 * nt) + 1) - (inv_ang_sum >> 8) * 2]; |
| } |
| |
| for(row = 0; row < nt; row++) |
| { |
| pos = ((row + 1) * intra_pred_ang); |
| idx = pos >> 5; |
| fract = pos & (31); |
| |
| // Do linear filtering |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| ref_main_idx_u = col + 2 * idx + 2; |
| ref_main_idx_v = (col + 1) + 2 * idx + 2; |
| pu1_dst[(row * dst_strd) + col] = (UWORD8)(((32 - fract) |
| * ref_main[ref_main_idx_u] |
| + fract * ref_main[ref_main_idx_u + 2] + 16) >> 5); |
| pu1_dst[(row * dst_strd) + (col + 1)] = (UWORD8)(((32 - fract) |
| * ref_main[ref_main_idx_v] |
| + fract * ref_main[ref_main_idx_v + 2] + 16) >> 5); |
| |
| } |
| |
| } |
| |
| } |
| |
| |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Intraprediction for mode 27 to 33 (positive angle, vertical mode ) with |
| * reference neighboring samples location pointed by 'pu1_ref' to the TU |
| * block location pointed by 'pu1_dst' |
| * |
| * @par Description: |
| * |
| * |
| * @param[in] pu1_src |
| * UWORD8 pointer to the source |
| * |
| * @param[in] pu1_dst |
| * UWORD8 pointer to the destination |
| * |
| * @param[in] src_strd |
| * integer source stride |
| * |
| * @param[in] dst_strd |
| * integer destination stride |
| * |
| * @param[in] nt |
| * integer Transform Block size |
| * |
| * @param[in] mode |
| * integer intraprediction mode |
| * |
| * @returns |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_intra_pred_chroma_mode_27_to_33(UWORD8 *pu1_ref, |
| WORD32 src_strd, |
| UWORD8 *pu1_dst, |
| WORD32 dst_strd, |
| WORD32 nt, |
| WORD32 mode) |
| { |
| WORD32 row, col; |
| WORD32 pos, fract; |
| WORD32 intra_pred_ang; |
| WORD32 idx, ref_main_idx_u, ref_main_idx_v; |
| UNUSED(src_strd); |
| |
| |
| intra_pred_ang = gai4_ihevc_ang_table_chroma[mode]; |
| |
| for(row = 0; row < nt; row++) |
| { |
| pos = ((row + 1) * intra_pred_ang); |
| idx = pos >> 5; |
| fract = pos & (31); |
| |
| |
| // Do linear filtering |
| for(col = 0; col < (2 * nt); col += 2) |
| { |
| ref_main_idx_u = (4 * nt) + col + 2 * idx + 2; |
| ref_main_idx_v = (4 * nt) + (col + 1) + 2 * idx + 2; |
| pu1_dst[col + (row * dst_strd)] = (((32 - fract) |
| * pu1_ref[ref_main_idx_u] |
| + fract * pu1_ref[ref_main_idx_u + 2] + 16) >> 5); |
| pu1_dst[(col + 1) + (row * dst_strd)] = (((32 - fract) |
| * pu1_ref[ref_main_idx_v] |
| + fract * pu1_ref[ref_main_idx_v + 2] + 16) >> 5); |
| |
| } |
| } |
| |
| } |
| |
