| /****************************************************************************** |
| * |
| * 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_iquant_recon.c |
| * |
| * @brief |
| * Contains function definitions for inverse quantization and |
| * reconstruction of chroma interleaved data. |
| * |
| * @author |
| * 100470 |
| * |
| * @par List of Functions: |
| * - ihevc_chroma_iquant_recon_4x4() |
| * - ihevc_chroma_iquant_recon_8x8() |
| * - ihevc_chroma_iquant_recon_16x16() |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "ihevc_typedefs.h" |
| #include "ihevc_macros.h" |
| #include "ihevc_platform_macros.h" |
| #include "ihevc_defs.h" |
| #include "ihevc_trans_tables.h" |
| #include "ihevc_chroma_iquant_recon.h" |
| #include "ihevc_func_selector.h" |
| #include "ihevc_trans_macros.h" |
| |
| /* All the functions work one component(U or V) of interleaved data depending upon pointers passed to it */ |
| /* Data visualization */ |
| /* U V U V U V U V */ |
| /* U V U V U V U V */ |
| /* U V U V U V U V */ |
| /* U V U V U V U V */ |
| /* If the pointer points to first byte of above stream (U) , functions will operate on U component */ |
| /* If the pointer points to second byte of above stream (V) , functions will operate on V component */ |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs inverse quantization and reconstruction for 4x4 |
| * input block |
| * |
| * @par Description: |
| * This function performs inverse quantization and reconstruction for 4x4 |
| * input block |
| * |
| * @param[in] pi2_src |
| * Input 4x4 coefficients |
| * |
| * @param[in] pu1_pred |
| * Prediction 4x4 block |
| * |
| * @param[in] pi2_dequant_coeff |
| * Dequant Coeffs |
| * |
| * @param[out] pu1_dst |
| * Output 4x4 block |
| * |
| * @param[in] qp_div |
| * Quantization parameter / 6 |
| * |
| * @param[in] qp_rem |
| * Quantization parameter % 6 |
| * |
| * @param[in] src_strd |
| * Input stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Output Stride |
| * |
| * @param[in] zero_cols |
| * Zero columns in pi2_src |
| * |
| * @returns Void |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_chroma_iquant_recon_4x4(WORD16 *pi2_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_dequant_coeff, |
| UWORD8 *pu1_dst, |
| WORD32 qp_div, /* qpscaled / 6 */ |
| WORD32 qp_rem, /* qpscaled % 6 */ |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| WORD32 dst_strd, |
| WORD32 zero_cols) |
| { |
| |
| { |
| /* Inverse Quant and recon */ |
| { |
| WORD32 i, j; |
| WORD32 shift_iq; |
| WORD32 trans_size; |
| /* Inverse Quantization constants */ |
| { |
| WORD32 log2_trans_size, bit_depth; |
| |
| log2_trans_size = 2; |
| bit_depth = 8 + 0; |
| shift_iq = bit_depth + log2_trans_size - 5; |
| } |
| |
| trans_size = TRANS_SIZE_4; |
| |
| for(i = 0; i < trans_size; i++) |
| { |
| /* Checking for Zero Cols */ |
| if((zero_cols & 1) == 1) |
| { |
| for(j = 0; j < trans_size; j++) |
| pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| } |
| else |
| { |
| for(j = 0; j < trans_size; j++) |
| { |
| WORD32 iquant_out; |
| IQUANT_4x4(iquant_out, |
| pi2_src[j * src_strd], |
| pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| shift_iq, qp_div); |
| iquant_out = (iquant_out + 16) >> 5; |
| pu1_dst[j * dst_strd] = |
| CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| } |
| } |
| pi2_src++; |
| pi2_dequant_coeff++; |
| pu1_pred += 2; |
| pu1_dst += 2; |
| |
| zero_cols = zero_cols >> 1; |
| } |
| } |
| } |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs inverse quantization and reconstruction for 8x8 |
| * input block |
| * |
| * @par Description: |
| * This function performs inverse quantization and reconstruction for 8x8 |
| * input block |
| * |
| * @param[in] pi2_src |
| * Input 8x8 coefficients |
| * |
| * @param[in] pu1_pred |
| * Prediction 8x8 block |
| * |
| * @param[in] pi2_dequant_coeff |
| * Dequant Coeffs |
| * |
| * @param[out] pu1_dst |
| * Output 8x8 block |
| * |
| * @param[in] qp_div |
| * Quantization parameter / 6 |
| * |
| * @param[in] qp_rem |
| * Quantization parameter % 6 |
| * |
| * @param[in] src_strd |
| * Input stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Output Stride |
| * |
| * @param[in] zero_cols |
| * Zero columns in pi2_src |
| * |
| * @returns Void |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_chroma_iquant_recon_8x8(WORD16 *pi2_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_dequant_coeff, |
| UWORD8 *pu1_dst, |
| WORD32 qp_div, /* qpscaled / 6 */ |
| WORD32 qp_rem, /* qpscaled % 6 */ |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| WORD32 dst_strd, |
| WORD32 zero_cols) |
| { |
| |
| { |
| /* Inverse Quant and recon */ |
| { |
| WORD32 i, j; |
| WORD32 shift_iq; |
| WORD32 trans_size; |
| /* Inverse Quantization constants */ |
| { |
| WORD32 log2_trans_size, bit_depth; |
| |
| log2_trans_size = 3; |
| bit_depth = 8 + 0; |
| shift_iq = bit_depth + log2_trans_size - 5; |
| } |
| |
| trans_size = TRANS_SIZE_8; |
| |
| for(i = 0; i < trans_size; i++) |
| { |
| /* Checking for Zero Cols */ |
| if((zero_cols & 1) == 1) |
| { |
| for(j = 0; j < trans_size; j++) |
| pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| } |
| else |
| { |
| for(j = 0; j < trans_size; j++) |
| { |
| WORD32 iquant_out; |
| IQUANT(iquant_out, |
| pi2_src[j * src_strd], |
| pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| shift_iq, qp_div); |
| iquant_out = (iquant_out + 16) >> 5; |
| pu1_dst[j * dst_strd] = |
| CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| } |
| } |
| pi2_src++; |
| pi2_dequant_coeff++; |
| pu1_pred += 2; |
| pu1_dst += 2; |
| |
| zero_cols = zero_cols >> 1; |
| } |
| } |
| } |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * This function performs inverse quantization and reconstruction for 16x16 |
| * input block |
| * |
| * @par Description: |
| * This function performs inverse quantization and reconstruction for 16x16 |
| * input block |
| * |
| * @param[in] pi2_src |
| * Input 16x16 coefficients |
| * |
| * @param[in] pu1_pred |
| * Prediction 16x16 block |
| * |
| * @param[in] pi2_dequant_coeff |
| * Dequant Coeffs |
| * |
| * @param[out] pu1_dst |
| * Output 16x16 block |
| * |
| * @param[in] qp_div |
| * Quantization parameter / 6 |
| * |
| * @param[in] qp_rem |
| * Quantization parameter % 6 |
| * |
| * @param[in] src_strd |
| * Input stride |
| * |
| * @param[in] pred_strd |
| * Prediction stride |
| * |
| * @param[in] dst_strd |
| * Output Stride |
| * |
| * @param[in] zero_cols |
| * Zero columns in pi2_src |
| * |
| * @returns Void |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| void ihevc_chroma_iquant_recon_16x16(WORD16 *pi2_src, |
| UWORD8 *pu1_pred, |
| WORD16 *pi2_dequant_coeff, |
| UWORD8 *pu1_dst, |
| WORD32 qp_div, /* qpscaled / 6 */ |
| WORD32 qp_rem, /* qpscaled % 6 */ |
| WORD32 src_strd, |
| WORD32 pred_strd, |
| WORD32 dst_strd, |
| WORD32 zero_cols) |
| |
| { |
| |
| { |
| /* Inverse Quant and recon */ |
| { |
| WORD32 i, j; |
| WORD32 shift_iq; |
| WORD32 trans_size; |
| /* Inverse Quantization constants */ |
| { |
| WORD32 log2_trans_size, bit_depth; |
| |
| log2_trans_size = 4; |
| bit_depth = 8 + 0; |
| shift_iq = bit_depth + log2_trans_size - 5; |
| } |
| |
| trans_size = TRANS_SIZE_16; |
| |
| for(i = 0; i < trans_size; i++) |
| { |
| /* Checking for Zero Cols */ |
| if((zero_cols & 1) == 1) |
| { |
| for(j = 0; j < trans_size; j++) |
| pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd]; |
| } |
| else |
| { |
| for(j = 0; j < trans_size; j++) |
| { |
| WORD32 iquant_out; |
| IQUANT(iquant_out, |
| pi2_src[j * src_strd], |
| pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem], |
| shift_iq, qp_div); |
| iquant_out = (iquant_out + 16) >> 5; |
| pu1_dst[j * dst_strd] = |
| CLIP_U8(iquant_out + pu1_pred[j * pred_strd]); |
| } |
| } |
| pi2_src++; |
| pi2_dequant_coeff++; |
| pu1_pred += 2; |
| pu1_dst += 2; |
| |
| zero_cols = zero_cols >> 1; |
| } |
| } |
| } |
| } |
| |
| |
