You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
216 lines
6.2 KiB
216 lines
6.2 KiB
/****************************************************************************** |
|
* |
|
* Copyright (C) 2015 The Android Open Source Project |
|
* |
|
* 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. |
|
* |
|
***************************************************************************** |
|
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
|
*/ |
|
/** |
|
******************************************************************************* |
|
* @file |
|
* ih264_ihadamard_scaling.c |
|
* |
|
* @brief |
|
* Contains definition of functions for h264 inverse hadamard 4x4 transform and scaling |
|
* |
|
* @author |
|
* Mohit |
|
* |
|
* @par List of Functions: |
|
* - ih264_ihadamard_scaling_4x4() |
|
* |
|
* @remarks |
|
* |
|
******************************************************************************* |
|
*/ |
|
|
|
/*****************************************************************************/ |
|
/* File Includes */ |
|
/*****************************************************************************/ |
|
|
|
/* User include files */ |
|
#include "ih264_typedefs.h" |
|
#include "ih264_defs.h" |
|
#include "ih264_trans_macros.h" |
|
#include "ih264_macros.h" |
|
#include "ih264_trans_data.h" |
|
#include "ih264_size_defs.h" |
|
#include "ih264_structs.h" |
|
#include "ih264_trans_quant_itrans_iquant.h" |
|
|
|
/* |
|
******************************************************************************** |
|
* |
|
* @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients |
|
* of a 16x16 intra prediction macroblock, and then performs scaling. |
|
* prediction buffer |
|
* |
|
* @par Description: |
|
* The DC coefficients pass through a 2-stage inverse hadamard transform. |
|
* This inverse transformed content is scaled to based on Qp value. |
|
* |
|
* @param[in] pi2_src |
|
* input 4x4 block of DC coefficients |
|
* |
|
* @param[out] pi2_out |
|
* output 4x4 block |
|
* |
|
* @param[in] pu2_iscal_mat |
|
* pointer to scaling list |
|
* |
|
* @param[in] pu2_weigh_mat |
|
* pointer to weight matrix |
|
* |
|
* @param[in] u4_qp_div_6 |
|
* Floor (qp/6) |
|
* |
|
* @param[in] pi4_tmp |
|
* temporary buffer of size 1*16 |
|
* |
|
* @returns none |
|
* |
|
* @remarks none |
|
* |
|
******************************************************************************* |
|
*/ |
|
void ih264_ihadamard_scaling_4x4(WORD16* pi2_src, |
|
WORD16* pi2_out, |
|
const UWORD16 *pu2_iscal_mat, |
|
const UWORD16 *pu2_weigh_mat, |
|
UWORD32 u4_qp_div_6, |
|
WORD32* pi4_tmp) |
|
{ |
|
WORD32 i; |
|
WORD32 x0, x1, x2, x3, x4, x5, x6, x7; |
|
WORD16* pi2_src_ptr, *pi2_out_ptr; |
|
WORD32* pi4_tmp_ptr; |
|
WORD32 rnd_fact = (u4_qp_div_6 < 6) ? (1 << (5 - u4_qp_div_6)) : 0; |
|
pi4_tmp_ptr = pi4_tmp; |
|
pi2_src_ptr = pi2_src; |
|
pi2_out_ptr = pi2_out; |
|
// Horizontal transform |
|
for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
|
{ |
|
x4 = pi2_src_ptr[0]; |
|
x5 = pi2_src_ptr[1]; |
|
x6 = pi2_src_ptr[2]; |
|
x7 = pi2_src_ptr[3]; |
|
|
|
x0 = x4 + x7; |
|
x1 = x5 + x6; |
|
x2 = x5 - x6; |
|
x3 = x4 - x7; |
|
|
|
pi4_tmp_ptr[0] = x0 + x1; |
|
pi4_tmp_ptr[1] = x2 + x3; |
|
pi4_tmp_ptr[2] = x0 - x1; |
|
pi4_tmp_ptr[3] = x3 - x2; |
|
|
|
pi4_tmp_ptr += SUB_BLK_WIDTH_4x4; |
|
pi2_src_ptr += SUB_BLK_WIDTH_4x4; |
|
} |
|
pi4_tmp_ptr = pi4_tmp; |
|
// Vertical Transform |
|
for(i = 0; i < SUB_BLK_WIDTH_4x4; i++) |
|
{ |
|
x4 = pi4_tmp_ptr[0]; |
|
x5 = pi4_tmp_ptr[4]; |
|
x6 = pi4_tmp_ptr[8]; |
|
x7 = pi4_tmp_ptr[12]; |
|
|
|
x0 = x4 + x7; |
|
x1 = x5 + x6; |
|
x2 = x5 - x6; |
|
x3 = x4 - x7; |
|
|
|
pi4_tmp_ptr[0] = x0 + x1; |
|
pi4_tmp_ptr[4] = x2 + x3; |
|
pi4_tmp_ptr[8] = x0 - x1; |
|
pi4_tmp_ptr[12] = x3 - x2; |
|
|
|
pi4_tmp_ptr++; |
|
} |
|
pi4_tmp_ptr = pi4_tmp; |
|
//Scaling |
|
for(i = 0; i < (SUB_BLK_WIDTH_4x4 * SUB_BLK_WIDTH_4x4); i++) |
|
{ |
|
INV_QUANT(pi4_tmp_ptr[i], pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, |
|
rnd_fact, 6); |
|
pi2_out_ptr[i] = pi4_tmp_ptr[i]; |
|
} |
|
} |
|
|
|
void ih264_ihadamard_scaling_2x2_uv(WORD16* pi2_src, |
|
WORD16* pi2_out, |
|
const UWORD16 *pu2_iscal_mat, |
|
const UWORD16 *pu2_weigh_mat, |
|
UWORD32 u4_qp_div_6, |
|
WORD32* pi4_tmp) |
|
{ |
|
WORD32 i4_x0,i4_x1,i4_x2,i4_x3,i4_x4,i4_x5,i4_x6,i4_x7; |
|
WORD32 i4_y0,i4_y1,i4_y2,i4_y3,i4_y4,i4_y5,i4_y6,i4_y7; |
|
|
|
UNUSED(pi4_tmp); |
|
|
|
i4_x4 = pi2_src[0]; |
|
i4_x5 = pi2_src[1]; |
|
i4_x6 = pi2_src[2]; |
|
i4_x7 = pi2_src[3]; |
|
|
|
i4_x0 = i4_x4 + i4_x5; |
|
i4_x1 = i4_x4 - i4_x5; |
|
i4_x2 = i4_x6 + i4_x7; |
|
i4_x3 = i4_x6 - i4_x7; |
|
|
|
i4_x4 = i4_x0+i4_x2; |
|
i4_x5 = i4_x1+i4_x3; |
|
i4_x6 = i4_x0-i4_x2; |
|
i4_x7 = i4_x1-i4_x3; |
|
|
|
INV_QUANT(i4_x4,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_x5,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_x6,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_x7,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
|
|
pi2_out[0] = i4_x4; |
|
pi2_out[1] = i4_x5; |
|
pi2_out[2] = i4_x6; |
|
pi2_out[3] = i4_x7; |
|
|
|
i4_y4 = pi2_src[4]; |
|
i4_y5 = pi2_src[5]; |
|
i4_y6 = pi2_src[6]; |
|
i4_y7 = pi2_src[7]; |
|
|
|
i4_y0 = i4_y4 + i4_y5; |
|
i4_y1 = i4_y4 - i4_y5; |
|
i4_y2 = i4_y6 + i4_y7; |
|
i4_y3 = i4_y6 - i4_y7; |
|
|
|
i4_y4 = i4_y0+i4_y2; |
|
i4_y5 = i4_y1+i4_y3; |
|
i4_y6 = i4_y0-i4_y2; |
|
i4_y7 = i4_y1-i4_y3; |
|
|
|
INV_QUANT(i4_y4,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_y5,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_y6,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
INV_QUANT(i4_y7,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5); |
|
|
|
pi2_out[4] = i4_y4; |
|
pi2_out[5] = i4_y5; |
|
pi2_out[6] = i4_y6; |
|
pi2_out[7] = i4_y7; |
|
}
|
|
|