/******************************************************************************
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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_trans_macros.h
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*
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* @brief
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* Macros used in the forward transform and inverse transform functions
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*
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* @author
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* Ittiam
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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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#ifndef IHEVC_TRANS_MACROS_H_
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#define IHEVC_TRANS_MACROS_H_
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#define QUANT(out, inp, quant_coeff, qp_div, log2_trans_size, q_add) \
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{ \
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LWORD64 tmp; \
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WORD32 sign; \
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WORD32 bit_depth,transform_shift; \
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WORD32 q_bits, quant_multiplier; \
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\
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/* q_bits and q_add calculation*/ \
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/* To be moved outside in neon. To be computer once per transform call */ \
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bit_depth = 8; \
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transform_shift = MAX_TR_DYNAMIC_RANGE - bit_depth - log2_trans_size; \
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quant_multiplier = 4 ; /* because quant_coeff are multiplied by 16. Instead of multiplying, we can reduce the division factor q_bits by 4 */ \
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q_bits = QUANT_SHIFT + qp_div + transform_shift + SCALING_Q_SHIFT - quant_multiplier ; \
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\
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sign = (inp)<0 ? -1:1; \
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\
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tmp = (LWORD64)(abs(inp)); \
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tmp = tmp * (quant_coeff); \
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tmp = tmp + (((LWORD64)q_add) << (q_bits - QUANT_ROUND_FACTOR_Q)); \
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tmp = tmp >> q_bits; \
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\
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tmp = tmp * sign; \
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out = (WORD16) CLIP_S16(tmp); \
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} \
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#define QUANT_HBD(out, inp, quant_coeff, qp_div, log2_trans_size, q_add, bit_depth) \
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{ \
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LWORD64 tmp; \
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WORD32 sign; \
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WORD32 transform_shift; \
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WORD32 q_bits, quant_multiplier; \
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\
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/* q_bits and q_add calculation*/ \
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/* To be moved outside in neon. To be computer once per transform call */ \
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\
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transform_shift = MAX_TR_DYNAMIC_RANGE - bit_depth - log2_trans_size; \
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quant_multiplier = 4 ; /* because quant_coeff are multiplied by 16. Instead of multiplying, we can reduce the division factor q_bits by 4 */ \
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q_bits = QUANT_SHIFT + qp_div + transform_shift + SCALING_Q_SHIFT - quant_multiplier ; \
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\
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sign = (inp)<0 ? -1:1; \
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\
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tmp = (LWORD64)(abs(inp)); \
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tmp = tmp * (quant_coeff); \
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tmp = tmp + (((LWORD64)q_add) << (q_bits - QUANT_ROUND_FACTOR_Q)); \
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tmp = tmp >> q_bits; \
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\
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tmp = tmp * sign; \
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out = (WORD16) CLIP_S16(tmp); \
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}
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/* added by 100028 */
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#define QUANT_NO_WEIGHTMAT(out, inp, quant_coeff, qp_div, log2_trans_size, q_add) \
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{ \
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WORD32 tmp; \
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WORD32 sign; \
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WORD32 bit_depth,transform_shift; \
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WORD32 q_bits, quant_multiplier; \
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\
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/* q_bits and q_add calculation*/ \
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/* To be moved outside in neon. To be computer once per transform call */ \
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bit_depth = 8; \
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transform_shift = MAX_TR_DYNAMIC_RANGE - bit_depth - log2_trans_size; \
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quant_multiplier = 4 ; /* because quant_coeff are multiplied by 16. Instead of multiplying, we can reduce the division factor q_bits by 4 */ \
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q_bits = QUANT_SHIFT + qp_div + transform_shift + SCALING_Q_SHIFT - quant_multiplier - FLAT_RESCALE_MAT_Q_SHIFT /* 2048 */; \
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\
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sign = (inp)<0 ? -1:1; \
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\
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tmp = (WORD32)(abs(inp)); \
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tmp = tmp * (quant_coeff); \
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tmp = tmp + (((WORD32)q_add) << (q_bits - QUANT_ROUND_FACTOR_Q)); \
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tmp = tmp >> q_bits; \
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\
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tmp = tmp * sign; \
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out = (WORD16) CLIP_S16(tmp); \
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}
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#define QUANT_NO_WEIGHTMAT_HBD(out, inp, quant_coeff, qp_div, log2_trans_size, q_add, bit_depth) \
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{ \
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WORD32 tmp; \
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WORD32 sign; \
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WORD32 transform_shift; \
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WORD32 q_bits, quant_multiplier; \
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\
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/* q_bits and q_add calculation*/ \
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/* To be moved outside in neon. To be computer once per transform call */ \
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\
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transform_shift = MAX_TR_DYNAMIC_RANGE - bit_depth - log2_trans_size; \
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quant_multiplier = 4 ; /* because quant_coeff are multiplied by 16. Instead of multiplying, we can reduce the division factor q_bits by 4 */ \
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q_bits = QUANT_SHIFT + qp_div + transform_shift + SCALING_Q_SHIFT - quant_multiplier - FLAT_RESCALE_MAT_Q_SHIFT /* 2048 */; \
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\
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sign = (inp)<0 ? -1:1; \
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\
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tmp = (WORD32)(abs(inp)); \
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tmp = tmp * (quant_coeff); \
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tmp = tmp + (((WORD32)q_add) << (q_bits - QUANT_ROUND_FACTOR_Q)); \
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tmp = tmp >> q_bits; \
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\
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tmp = tmp * sign; \
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out = (WORD16) CLIP_S16(tmp); \
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}
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/* Reference Inverse Quantization: "pi2_src"(Coefficients) will be clipped to 15 or 14 bits when (qp_div > shift_iq). Spec doesn't have any clip mentioned */
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/* Inverse quantization other than 4x4 */
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/* No clipping is needed for "pi2_src"(coefficients) */
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#define IQUANT(res, coeff /*pi2_src[index*src_strd]*/, dequant_coeff /*pi2_dequant_coeff[index*trans_size] * g_ihevc_iquant_scales[qp_rem] */, shift_iq, qp_div) \
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{ \
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WORD32 tmp, add_iq; \
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\
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add_iq = SHL_NEG(1 , (shift_iq - qp_div - 1)); /* To be moved outside in neon. To be computed once per transform call */ \
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\
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tmp = coeff * dequant_coeff ; \
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tmp = tmp + add_iq; \
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tmp = SHR_NEG(tmp,(shift_iq - qp_div)); \
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\
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res = CLIP_S16(tmp); \
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}
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/* 4x4 inverse quantization */
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/* Options : */
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/* 1. Clip "pi2_src"(coefficients) to 10 bits if "(qp_div >= shift_iq)" or 16 bits if "(qp_div < shift_iq)"*/
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/* 2. Increasing precision of "pi2_src"(coefficients) to 64 bits */
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#define IQUANT_4x4(res, coeff /*pi2_src[index*src_strd]*/, dequant_coeff /*pi2_dequant_coeff[index*trans_size] * g_ihevc_iquant_scales[qp_rem] */, shift_iq, qp_div) \
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{ \
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WORD32 clip_coeff, tmp; \
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WORD32 coeff_min,coeff_max; \
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WORD32 coeff_bit_range; \
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WORD32 add_iq; \
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add_iq = SHL_NEG(1 , (shift_iq - qp_div - 1)); /* To be moved outside in neon. To be computed once per transform call */ \
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\
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coeff_bit_range = 16; \
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if(qp_div > shift_iq) \
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coeff_bit_range = 10; \
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\
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coeff_min = -(1<<(coeff_bit_range-1)); \
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coeff_max = (1<<(coeff_bit_range-1)) - 1; \
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\
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clip_coeff = CLIP3(coeff,coeff_min,coeff_max); \
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\
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tmp = clip_coeff * dequant_coeff ; \
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tmp = tmp + add_iq; \
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tmp = SHR_NEG(tmp,(shift_iq - qp_div)); \
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\
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res = CLIP_S16(tmp); \
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}
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#endif /* IHEVC_TRANS_MACROS_H_ */
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