399 lines
11 KiB
C
399 lines
11 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/**
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*******************************************************************************
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* @file
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* ihevc_chroma_iquant_recon.c
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*
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* @brief
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* Contains function definitions for inverse quantization and
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* reconstruction of chroma interleaved data.
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*
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* @author
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* 100470
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*
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* @par List of Functions:
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* - ihevc_chroma_iquant_recon_4x4()
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* - ihevc_chroma_iquant_recon_8x8()
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* - ihevc_chroma_iquant_recon_16x16()
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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#include <stdio.h>
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#include <string.h>
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#include "ihevc_typedefs.h"
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#include "ihevc_macros.h"
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#include "ihevc_platform_macros.h"
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#include "ihevc_defs.h"
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#include "ihevc_trans_tables.h"
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#include "ihevc_chroma_iquant_recon.h"
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#include "ihevc_func_selector.h"
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#include "ihevc_trans_macros.h"
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/* All the functions work one component(U or V) of interleaved data depending upon pointers passed to it */
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/* Data visualization */
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/* U V U V U V U V */
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/* U V U V U V U V */
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/* U V U V U V U V */
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/* U V U V U V U V */
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/* If the pointer points to first byte of above stream (U) , functions will operate on U component */
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/* If the pointer points to second byte of above stream (V) , functions will operate on V component */
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/**
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*******************************************************************************
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*
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* @brief
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* This function performs inverse quantization and reconstruction for 4x4
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* input block
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*
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* @par Description:
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* This function performs inverse quantization and reconstruction for 4x4
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* input block
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*
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* @param[in] pi2_src
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* Input 4x4 coefficients
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*
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* @param[in] pu1_pred
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* Prediction 4x4 block
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*
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* @param[in] pi2_dequant_coeff
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* Dequant Coeffs
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*
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* @param[out] pu1_dst
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* Output 4x4 block
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*
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* @param[in] qp_div
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* Quantization parameter / 6
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*
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* @param[in] qp_rem
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* Quantization parameter % 6
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*
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* @param[in] src_strd
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* Input stride
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*
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* @param[in] pred_strd
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* Prediction stride
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*
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* @param[in] dst_strd
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* Output Stride
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*
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* @param[in] zero_cols
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* Zero columns in pi2_src
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*
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* @returns Void
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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void ihevc_chroma_iquant_recon_4x4(WORD16 *pi2_src,
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UWORD8 *pu1_pred,
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WORD16 *pi2_dequant_coeff,
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UWORD8 *pu1_dst,
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WORD32 qp_div, /* qpscaled / 6 */
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WORD32 qp_rem, /* qpscaled % 6 */
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WORD32 src_strd,
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WORD32 pred_strd,
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WORD32 dst_strd,
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WORD32 zero_cols)
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{
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{
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/* Inverse Quant and recon */
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{
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WORD32 i, j;
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WORD32 shift_iq;
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WORD32 trans_size;
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/* Inverse Quantization constants */
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{
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WORD32 log2_trans_size, bit_depth;
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log2_trans_size = 2;
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bit_depth = 8 + 0;
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shift_iq = bit_depth + log2_trans_size - 5;
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}
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trans_size = TRANS_SIZE_4;
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for(i = 0; i < trans_size; i++)
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{
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/* Checking for Zero Cols */
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if((zero_cols & 1) == 1)
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{
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for(j = 0; j < trans_size; j++)
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pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd];
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}
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else
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{
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for(j = 0; j < trans_size; j++)
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{
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WORD32 iquant_out;
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IQUANT_4x4(iquant_out,
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pi2_src[j * src_strd],
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pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem],
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shift_iq, qp_div);
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iquant_out = (iquant_out + 16) >> 5;
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pu1_dst[j * dst_strd] =
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CLIP_U8(iquant_out + pu1_pred[j * pred_strd]);
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}
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}
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pi2_src++;
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pi2_dequant_coeff++;
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pu1_pred += 2;
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pu1_dst += 2;
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zero_cols = zero_cols >> 1;
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}
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}
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}
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}
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/**
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*******************************************************************************
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*
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* @brief
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* This function performs inverse quantization and reconstruction for 8x8
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* input block
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*
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* @par Description:
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* This function performs inverse quantization and reconstruction for 8x8
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* input block
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*
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* @param[in] pi2_src
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* Input 8x8 coefficients
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*
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* @param[in] pu1_pred
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* Prediction 8x8 block
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*
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* @param[in] pi2_dequant_coeff
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* Dequant Coeffs
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*
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* @param[out] pu1_dst
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* Output 8x8 block
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*
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* @param[in] qp_div
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* Quantization parameter / 6
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*
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* @param[in] qp_rem
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* Quantization parameter % 6
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*
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* @param[in] src_strd
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* Input stride
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*
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* @param[in] pred_strd
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* Prediction stride
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*
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* @param[in] dst_strd
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* Output Stride
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*
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* @param[in] zero_cols
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* Zero columns in pi2_src
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*
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* @returns Void
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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void ihevc_chroma_iquant_recon_8x8(WORD16 *pi2_src,
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UWORD8 *pu1_pred,
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WORD16 *pi2_dequant_coeff,
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UWORD8 *pu1_dst,
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WORD32 qp_div, /* qpscaled / 6 */
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WORD32 qp_rem, /* qpscaled % 6 */
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WORD32 src_strd,
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WORD32 pred_strd,
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WORD32 dst_strd,
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WORD32 zero_cols)
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{
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{
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/* Inverse Quant and recon */
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{
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WORD32 i, j;
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WORD32 shift_iq;
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WORD32 trans_size;
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/* Inverse Quantization constants */
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{
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WORD32 log2_trans_size, bit_depth;
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log2_trans_size = 3;
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bit_depth = 8 + 0;
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shift_iq = bit_depth + log2_trans_size - 5;
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}
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trans_size = TRANS_SIZE_8;
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for(i = 0; i < trans_size; i++)
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{
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/* Checking for Zero Cols */
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if((zero_cols & 1) == 1)
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{
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for(j = 0; j < trans_size; j++)
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pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd];
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}
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else
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{
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for(j = 0; j < trans_size; j++)
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{
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WORD32 iquant_out;
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IQUANT(iquant_out,
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pi2_src[j * src_strd],
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pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem],
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shift_iq, qp_div);
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iquant_out = (iquant_out + 16) >> 5;
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pu1_dst[j * dst_strd] =
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CLIP_U8(iquant_out + pu1_pred[j * pred_strd]);
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}
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}
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pi2_src++;
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pi2_dequant_coeff++;
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pu1_pred += 2;
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pu1_dst += 2;
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zero_cols = zero_cols >> 1;
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}
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}
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}
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}
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/**
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*******************************************************************************
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*
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* @brief
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* This function performs inverse quantization and reconstruction for 16x16
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* input block
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*
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* @par Description:
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* This function performs inverse quantization and reconstruction for 16x16
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* input block
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*
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* @param[in] pi2_src
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* Input 16x16 coefficients
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*
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* @param[in] pu1_pred
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* Prediction 16x16 block
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*
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* @param[in] pi2_dequant_coeff
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* Dequant Coeffs
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*
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* @param[out] pu1_dst
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* Output 16x16 block
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*
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* @param[in] qp_div
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* Quantization parameter / 6
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*
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* @param[in] qp_rem
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* Quantization parameter % 6
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*
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* @param[in] src_strd
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* Input stride
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*
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* @param[in] pred_strd
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* Prediction stride
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*
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* @param[in] dst_strd
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* Output Stride
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*
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* @param[in] zero_cols
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* Zero columns in pi2_src
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*
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* @returns Void
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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void ihevc_chroma_iquant_recon_16x16(WORD16 *pi2_src,
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UWORD8 *pu1_pred,
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WORD16 *pi2_dequant_coeff,
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UWORD8 *pu1_dst,
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WORD32 qp_div, /* qpscaled / 6 */
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WORD32 qp_rem, /* qpscaled % 6 */
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WORD32 src_strd,
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WORD32 pred_strd,
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WORD32 dst_strd,
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WORD32 zero_cols)
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{
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{
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/* Inverse Quant and recon */
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{
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WORD32 i, j;
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WORD32 shift_iq;
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WORD32 trans_size;
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/* Inverse Quantization constants */
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{
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WORD32 log2_trans_size, bit_depth;
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log2_trans_size = 4;
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bit_depth = 8 + 0;
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shift_iq = bit_depth + log2_trans_size - 5;
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}
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trans_size = TRANS_SIZE_16;
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for(i = 0; i < trans_size; i++)
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{
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/* Checking for Zero Cols */
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if((zero_cols & 1) == 1)
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{
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for(j = 0; j < trans_size; j++)
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pu1_dst[j * dst_strd] = pu1_pred[j * pred_strd];
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}
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else
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{
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for(j = 0; j < trans_size; j++)
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{
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WORD32 iquant_out;
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IQUANT(iquant_out,
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pi2_src[j * src_strd],
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pi2_dequant_coeff[j * trans_size] * g_ihevc_iquant_scales[qp_rem],
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shift_iq, qp_div);
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iquant_out = (iquant_out + 16) >> 5;
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pu1_dst[j * dst_strd] =
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CLIP_U8(iquant_out + pu1_pred[j * pred_strd]);
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}
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}
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pi2_src++;
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pi2_dequant_coeff++;
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pu1_pred += 2;
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pu1_dst += 2;
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zero_cols = zero_cols >> 1;
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}
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}
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}
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}
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