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uvg266/src/context.c

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/*****************************************************************************
* This file is part of uvg266 VVC encoder.
*
* Copyright (c) 2021, Tampere University, ITU/ISO/IEC, project contributors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* * Neither the name of the Tampere University or ITU/ISO/IEC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
****************************************************************************/
#include "context.h"
#include "tables.h"
static const uint8_t INIT_SPLIT_FLAG[4][9] = {
{ 18, 27, 15, 18, 28, 45, 26, 7, 23, },
{ 11, 35, 53, 12, 6, 30, 13, 15, 31, },
{ 19, 28, 38, 27, 29, 38, 20, 30, 31, },
{ 12, 13, 8, 8, 13, 12, 5, 9, 9, },
};
static const uint8_t INIT_QT_SPLIT_FLAG[4][6] = {
{ 26, 36, 38, 18, 34, 21, },
{ 20, 14, 23, 18, 19, 6, },
{ 27, 6, 15, 25, 19, 37, },
{ 0, 8, 8, 12, 12, 8, },
};
static const uint8_t INIT_SKIP_FLAG[4][3] = {
{ 57, 60, 46, },
{ 57, 59, 45, },
{ 0, 26, 28, },
{ 5, 4, 8, },
};
static const uint8_t INIT_MERGE_FLAG_EXT[4][1] = {
{ 6, },
{ 21, },
{ 26, },
{ 4, },
};
static const uint8_t INIT_MERGE_IDX_EXT[4][1] = {
{ 18, },
{ 20, },
{ 34, },
{ 4, },
};
static const uint8_t INIT_PART_SIZE[4][4] = {
{ CNU, CNU, CNU, CNU,},
{ CNU, CNU, CNU, CNU,},
{ CNU, CNU, CNU, CNU,},
{ DWS, DWS, DWS, DWS, }
};
static const uint8_t INIT_PRED_MODE[4][2] = {
{ 40, 35, },
{ 40, 35, },
{ CNU, CNU, },
{ 5, 1, },
};
static const uint8_t MULTI_REF_LINE_MODE[4][2] = {
{ 25, 59, },
{ 25, 58, },
{ 25, 60, },
{ 5, 8, },
};
static const uint8_t MIP_FLAG[4][4] = {
{ 56, 57, 50, 26, },
{ 41, 57, 58, 26, },
{ 33, 49, 50, 25, },
{ 9, 10, 9, 6, },
};
static const uint8_t INIT_INTRA_LUMA_MPM_FLAG[4] = {
44, 36, 45, 6
};
static const uint8_t INIT_INTRA_LUMA_PLANAR_MODE[4][2] = {
{ 13, 6, },
{ 12, 20, },
{ 13, 28, },
{ 1, 5, },
};
static const uint8_t INIT_CHROMA_PRED_MODE[4] = {
25,
25,
34,
5,
};
static const uint8_t INIT_CU_QP_DELTA_ABS[4][2] = {
{ CNU, CNU, },
{ CNU, CNU, },
{ CNU, CNU, },
{ DWS, DWS, },
};
static const uint8_t INIT_INTER_DIR[4][6] = {
{ 14, 13, 5, 4, 3, 40, },
{ 7, 6, 5, 12, 4, 40, },
{ CNU, CNU, CNU, CNU, CNU, CNU, },
{ 0, 0, 1, 4, 4, 0, },
};
static const uint8_t INIT_REF_PIC[4][2] = {
{ 5, 35, },
{ 20, 35, },
{ CNU, CNU, },
{ 0, 4, },
};
static const uint8_t INIT_MVD[4][2] = {
{ 51, 36, },
{ 44, 43, },
{ 14, 45, },
{ 9, 5, },
};
static const uint8_t INIT_QT_ROOT_CBF[4][1] = {
{ 12, },
{ 5, },
{ 6, },
{ 4, },
};
static const uint8_t INIT_QT_CBF[4][9] = {
{ 15, 6, 5, 14, 25, 37, 9, 36, 45},
{ 23, 5, 20, 7, 25, 28, 25, 29, 45},
{ 15, 12, 5, 7, 12, 21, 33, 28, 36},
{ 5, 1, 8, 9, 5, 0, 2, 1, 0},
};
static const uint8_t BDPCM_MODE_INIT[4][4] = {
{ 19, 21, 0, 28, },
{ 40, 36, 0, 13, },
{ 19, 35, 1, 27, },
{ 1, 4, 1, 0, },
};
static const uint8_t INIT_SIG_COEFF_GROUP[4][4] = {
{ 25, 45, 25, 14},
{ 25, 30, 25, 45},
{ 18, 31, 25, 15},
{ 8, 5, 5, 8},
};
static const uint8_t INIT_SIG_FLAG[6][4][12] = {
{
{ 17, 41, 49, 36, 1, 49, 50, 37, 48, 51, 58, 45, },
{ 17, 41, 42, 29, 25, 49, 43, 37, 33, 58, 51, 30, },
{ 25, 19, 28, 14, 25, 20, 29, 30, 19, 37, 30, 38, },
{ 12, 9, 9, 10, 9, 9, 9, 10, 8, 8, 8, 10, },
},
{
{ 9, 49, 50, 36, 48, 59, 59, 38, },
{ 17, 34, 35, 21, 41, 59, 60, 38, },
{ 25, 27, 28, 37, 34, 53, 53, 46, },
{ 12, 12, 9, 13, 4, 5, 8, 9, },
},
{
{ 26, 45, 53, 46, 49, 54, 61, 39, 35, 39, 39, 39, },
{ 19, 38, 38, 46, 34, 54, 54, 39, 6, 39, 39, 39, },
{ 11, 38, 46, 54, 27, 39, 39, 39, 44, 39, 39, 39, },
{ 9, 13, 8, 8, 8, 8, 8, 5, 8, 0, 0, 0, },
},
{
{ 34, 45, 38, 31, 58, 39, 39, 39, },
{ 35, 45, 53, 54, 44, 39, 39, 39, },
{ 19, 46, 38, 39, 52, 39, 39, 39, },
{ 8, 12, 12, 8, 4, 0, 0, 0, },
},
{
{ 19, 54, 39, 39, 50, 39, 39, 39, 0, 39, 39, 39, },
{ 19, 39, 54, 39, 19, 39, 39, 39, 56, 39, 39, 39, },
{ 18, 39, 39, 39, 27, 39, 39, 39, 0, 39, 39, 39, },
{ 8, 8, 8, 8, 8, 0, 4, 4, 0, 0, 0, 0, },
},
{
{ 34, 38, 54, 39, 41, 39, 39, 39, },
{ 34, 38, 62, 39, 26, 39, 39, 39, },
{ 11, 39, 39, 39, 19, 39, 39, 39, },
{ 8, 8, 8, 8, 4, 0, 0, 0, },
}
};
static const uint8_t INIT_PARITY_FLAG[2][4][21] =
{
{
{ 33, 40, 25, 41, 26, 42, 25, 33, 26, 34, 27, 25, 41, 42, 42, 35, 33, 27, 35, 42, 43, },
{ 18, 17, 33, 18, 26, 42, 25, 33, 26, 42, 27, 25, 34, 42, 42, 35, 26, 27, 42, 20, 20, },
{ 33, 25, 18, 26, 34, 27, 25, 26, 19, 42, 35, 33, 19, 27, 35, 35, 34, 42, 20, 43, 20, },
{ 8, 9, 12, 13, 13, 13, 10, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 13, 13, 13, 13, },
},
{
{ 33, 25, 26, 34, 19, 27, 33, 42, 43, 35, 43, },
{ 25, 25, 26, 11, 19, 27, 33, 42, 35, 35, 43, },
{ 33, 25, 26, 42, 19, 27, 26, 50, 35, 20, 43, },
{ 8, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, },
}
};
static const uint8_t INIT_GTX_FLAG[4][4][21] =
{
{
{ 25, 0, 0, 17, 25, 26, 0, 9, 25, 33, 19, 0, 25, 33, 26, 20, 25, 33, 27, 35, 22, },
{ 17, 0, 1, 17, 25, 18, 0, 9, 25, 33, 34, 9, 25, 18, 26, 20, 25, 18, 19, 27, 29, },
{ 25, 1, 40, 25, 33, 11, 17, 25, 25, 18, 4, 17, 33, 26, 19, 13, 33, 19, 20, 28, 22, },
{ 1, 5, 9, 9, 9, 6, 5, 9, 10, 10, 9, 9, 9, 9, 9, 9, 6, 8, 9, 9, 10, },
},
{
{ 25, 1, 25, 33, 26, 12, 25, 33, 27, 28, 37, },
{ 17, 9, 25, 10, 18, 4, 17, 33, 19, 20, 29, },
{ 40, 9, 25, 18, 26, 35, 25, 26, 35, 28, 37, },
{ 1, 5, 8, 8, 9, 6, 6, 9, 8, 8, 9, },
},
{
{ 0, 0, 33, 34, 35, 21, 25, 34, 35, 28, 29, 40, 42, 43, 29, 30, 49, 36, 37, 45, 38, },
{ 0, 17, 26, 19, 35, 21, 25, 34, 20, 28, 29, 33, 27, 28, 29, 22, 34, 28, 44, 37, 38, },
{ 25, 25, 11, 27, 20, 21, 33, 12, 28, 21, 22, 34, 28, 29, 29, 30, 36, 29, 45, 30, 23, },
{ 9, 5, 10, 13, 13, 10, 9, 10, 13, 13, 13, 9, 10, 10, 10, 13, 8, 9, 10, 10, 13, },
},
{
{ 0, 40, 34, 43, 36, 37, 57, 52, 45, 38, 46, },
{ 0, 25, 19, 20, 13, 14, 57, 44, 30, 30, 23, },
{ 40, 33, 27, 28, 21, 37, 36, 37, 45, 38, 46, },
{ 8, 8, 9, 12, 12, 10, 5, 9, 9, 9, 13, },
}
};
static const uint8_t INIT_LAST_X[4][23] = {
{ 6, 6, 12, 14, 6, 4, 14, 7, 6, 4, 29, 7, 6, 6, 12, 28, 7, 13, 13, 35, 19, 5, 4, },
{ 6, 13, 12, 6, 6, 12, 14, 14, 13, 12, 29, 7, 6, 13, 36, 28, 14, 13, 5, 26, 12, 4, 18, },
{ 13, 5, 4, 21, 14, 4, 6, 14, 21, 11, 14, 7, 14, 5, 11, 21, 30, 22, 13, 42, 12, 4, 3, },
{ 8, 5, 4, 5, 4, 4, 5, 4, 1, 0, 4, 1, 0, 0, 0, 0, 1, 0, 0, 0, 5, 4, 4, },
};
static const uint8_t INIT_LAST_Y[4][23] = {
{ 5, 5, 20, 13, 13, 19, 21, 6, 12, 12, 14, 14, 5, 4, 12, 13, 7, 13, 12, 41, 11, 5, 27, },
{ 5, 5, 12, 6, 6, 4, 6, 14, 5, 12, 14, 7, 13, 5, 13, 21, 14, 20, 12, 34, 11, 4, 18, },
{ 13, 5, 4, 6, 13, 11, 14, 6, 5, 3, 14, 22, 6, 4, 3, 6, 22, 29, 20, 34, 12, 4, 3, },
{ 8, 5, 8, 5, 5, 4, 5, 5, 4, 0, 5, 4, 1, 0, 0, 1, 4, 0, 0, 0, 6, 5, 5, },
};
static const uint8_t INIT_MVP_IDX[4][1] = {
{ 34, },
{ 34, },
{ 42, },
{ 12, },
};
static const uint8_t INIT_SAO_MERGE_FLAG[4] = { 2, 60, 60, 0 };
static const uint8_t INIT_SAO_TYPE_IDX[4] = { 2, 5, 13, 4 };
static const uint8_t INIT_LFNST_IDX[4][3] = {
{ 52, 37, 27, },
{ 37, 45, 27, },
{ 28, 52, 42, },
{ 9, 9, 10, },
};
static const uint8_t INIT_MTS_IDX[4][4] = {
{ 45, 25, 27, 0, },
{ 45, 40, 27, 0, },
{ 29, 0, 28, 0, },
{ 8, 0, 9, 0, },
};
static const uint8_t INIT_JOINT_CB_CR_FLAG[4][3] = {
{ 42, 43, 52, },
{ 27, 36, 45, },
{ 12, 21, 35, },
{ 1, 1, 0, },
};
static const uint8_t INIT_CTB_ALF_FLAG[4][9] = {
{ 33, 52, 46, 25, 61, 54, 25, 61, 54, },
{ 13, 23, 46, 4, 61, 54, 19, 46, 54, },
{ 62, 39, 39, 54, 39, 39, 31, 39, 39, },
{ 0, 0, 0, 4, 0, 0, 1, 0, 0, },
};
static const uint8_t INIT_CTB_ALF_ALTERNATIVE[4][2] = {
{ 11, 26, },
{ 20, 12, },
{ 11, 11, },
{ 0, 0, },
};
static const uint8_t INIT_USE_TEMPORAL_ALF_FILT[4] = {
46,
46,
46,
0,
};
static const uint8_t INIT_CC_ALF_FILTER_CONTROL_FLAG[4][6] = {
{ 25, 35, 38, 25, 28, 38, },
{ 18, 21, 38, 18, 21, 38, },
{ 18, 30, 31, 18, 30, 31, },
{ 4, 1, 4, 4, 1, 4, },
};
static const uint8_t INIT_CU_TRANSQUANT_BYPASS[4][1] = {
{ CNU, },
{ CNU, },
{ CNU, },
{ DWS, },
};
static const uint8_t INIT_TRANSFORM_SKIP[4][2] = {
{ 25, 17, },
{ 25, 9, },
{ 25, 9, },
{ 1, 1, },
};
static const uint8_t INIT_TRANSFORM_SKIP_SIG_COEFF_GROUP[4][3] =
{
{ 18, 35, 45, },
{ 18, 12, 29, },
{ 18, 20, 38, },
{ 5, 8, 8, },
};
static const uint8_t INIT_TRANSFORM_SKIP_SIG[4][3] =
{
{ 25, 50, 37, },
{ 40, 35, 44, },
{ 25, 28, 38, },
{ 13, 13, 8, },
};
static const uint8_t INIT_TRANSFORM_SKIP_PARITY[4][1] =
{
{ 11, },
{ 3, },
{ 11, },
{ 6, },
};
static const uint8_t INIT_TRANSFORM_SKIP_GT2[4][5] =
{
{ CNU, 3, 4, 4, 5, },
{ CNU, 2, 10, 3, 3, },
{ CNU, 10, 3, 3, 3, },
{ DWS, 1, 1, 1, 1, },
};
static const uint8_t INIT_TRANSFORM_SKIP_GT1[4][4] =
{
{ 19, 11, 4, 6, },
{ 18, 11, 4, 28, },
{ 11, 5, 5, 14, },
{ 4, 2, 1, 6, },
};
static const uint8_t INIT_TRANSFORM_SKIP_RES_SIGN[4][6] =
{
{ 35, 25, 46, 28, 33, 38, },
{ 5, 10, 53, 43, 25, 46, },
{ 12, 17, 46, 28, 25, 46, },
{ 1, 4, 4, 5, 8, 8, },
};
static const uint8_t INIT_INTRA_SUBPART_MODE[4][2] = {
{ 33, 43, },
{ 33, 36, },
{ 33, 43, },
{ 9, 2, },
};
static const uint8_t INIT_IMV_FLAG[4][5] = {
{ 59, 26, 50, 60, 38, },
{ 59, 48, 58, 60, 60, },
{ CNU, 34, CNU, CNU, CNU, },
{ 0, 5, 0, 0, 4, },
};
static const uint8_t INIT_CCLM_FLAG[4] = {
26,
34,
59,
4,
};
static const uint8_t INIT_CCLM_MODEL[4] = {
27,
27,
27,
9,
};
/*
static const uint16_t g_inistateToCount[128] = {
614, 647, 681, 718, 756, 797, 839, 884, 932, 982, 1034, 1089, 1148, 1209, 1274, 1342,
1414, 1490, 1569, 1653, 1742, 1835, 1933, 2037, 2146, 2261, 2382, 2509, 2643, 2785, 2934, 3091,
3256, 3430, 3614, 3807, 4011, 4225, 4452, 4690, 4941, 5205, 5483, 5777, 6086, 6412, 6755, 7116,
7497, 7898, 8320, 8766, 9235, 9729, 10249, 10798, 11375, 11984, 12625, 13300, 14012, 14762, 15551, 16384,
16384, 17216, 18005, 18755, 19467, 20142, 20783, 21392, 21969, 22518, 23038, 23532, 24001, 24447, 24869, 25270,
25651, 26012, 26355, 26681, 26990, 27284, 27562, 27826, 28077, 28315, 28542, 28756, 28960, 29153, 29337, 29511,
29676, 29833, 29982, 30124, 30258, 30385, 30506, 30621, 30730, 30834, 30932, 31025, 31114, 31198, 31277, 31353,
31425, 31493, 31558, 31619, 31678, 31733, 31785, 31835, 31883, 31928, 31970, 32011, 32049, 32086, 32120, 32153
};*/
/**
* \brief Initialize struct cabac_ctx.
*/
void uvg_ctx_init(cabac_ctx_t *ctx, int32_t qp, int32_t init_value, uint8_t rate)
{
int slope = (init_value >> 3) - 4;
int offset = ((init_value & 7) * 18) + 1;
int inistate = ((slope * (qp - 16)) >> 1) + offset;
int state_clip = inistate < 1 ? 1 : inistate > 127 ? 127 : inistate;
const int p1 = (state_clip << 8);
/*
int slope = (init_value >> 4) * 5 - 45;
int offset = ((init_value & 15) << 3) - 16;
int init_state = ((slope * (int)qp) >> 4) + offset;
const int p1 = g_inistateToCount[init_state < 0 ? 0 : init_state > 127 ? 127 : init_state];
*/
ctx->state[0] = p1 & CTX_MASK_0;
ctx->state[1] = p1 & CTX_MASK_1;
CTX_SET_LOG2_WIN(ctx, rate);
}
/**
* \brief Initialize cabac context to be used for coding
* \param encoder encoder control struct
* \param slice type of slice we are coding (P/B/I)
*/
void uvg_init_contexts(encoder_state_t *state, int8_t QP, int8_t slice)
{
cabac_data_t * const cabac = &state->cabac;
memset(&state->cabac.ctx, 0, sizeof(state->cabac.ctx));
uint16_t i, ii;
// Initialize contexts
uvg_ctx_init(&cabac->ctx.sao_merge_flag_model, QP, INIT_SAO_MERGE_FLAG[slice], INIT_SAO_MERGE_FLAG[3]);
uvg_ctx_init(&cabac->ctx.sao_type_idx_model, QP, INIT_SAO_TYPE_IDX[slice], INIT_SAO_TYPE_IDX[3]);
uvg_ctx_init(&cabac->ctx.alf_temporal_filt, QP, INIT_USE_TEMPORAL_ALF_FILT[slice], INIT_USE_TEMPORAL_ALF_FILT[3]);
uvg_ctx_init(&cabac->ctx.cu_merge_flag_ext_model, QP, INIT_MERGE_FLAG_EXT[slice][0], INIT_MERGE_FLAG_EXT[3][0]);
uvg_ctx_init(&cabac->ctx.cu_merge_idx_ext_model, QP, INIT_MERGE_IDX_EXT[slice][0], INIT_MERGE_IDX_EXT[3][0]);
uvg_ctx_init(&cabac->ctx.cu_transquant_bypass, QP, INIT_CU_TRANSQUANT_BYPASS[slice][0], INIT_CU_TRANSQUANT_BYPASS[3][0]);
uvg_ctx_init(&cabac->ctx.intra_luma_mpm_flag_model, QP, INIT_INTRA_LUMA_MPM_FLAG[slice], INIT_INTRA_LUMA_MPM_FLAG[3]);
uvg_ctx_init(&cabac->ctx.intra_subpart_model[0], QP, INIT_INTRA_SUBPART_MODE[slice][0], INIT_INTRA_SUBPART_MODE[3][0]);
uvg_ctx_init(&cabac->ctx.intra_subpart_model[1], QP, INIT_INTRA_SUBPART_MODE[slice][1], INIT_INTRA_SUBPART_MODE[3][1]);
uvg_ctx_init(&cabac->ctx.transform_skip_model_luma, QP, INIT_TRANSFORM_SKIP[slice][0], INIT_TRANSFORM_SKIP[3][0]);
uvg_ctx_init(&cabac->ctx.transform_skip_model_chroma, QP, INIT_TRANSFORM_SKIP[slice][1], INIT_TRANSFORM_SKIP[3][1]);
uvg_ctx_init(&cabac->ctx.transform_skip_par, QP, INIT_TRANSFORM_SKIP_PARITY[slice][0], INIT_TRANSFORM_SKIP_PARITY[3][0]);
uvg_ctx_init(&cabac->ctx.multi_ref_line[0], QP, MULTI_REF_LINE_MODE[slice][0], MULTI_REF_LINE_MODE[3][0]);
uvg_ctx_init(&cabac->ctx.multi_ref_line[1], QP, MULTI_REF_LINE_MODE[slice][1], MULTI_REF_LINE_MODE[3][1]);
for (i = 0; i < 4; i++) {
uvg_ctx_init(&cabac->ctx.mip_flag[i], QP, MIP_FLAG[slice][i], MIP_FLAG[3][i]);
}
uvg_ctx_init(&cabac->ctx.chroma_pred_model, QP, INIT_CHROMA_PRED_MODE[slice], INIT_CHROMA_PRED_MODE[3]);
uvg_ctx_init(&cabac->ctx.cclm_flag, QP, INIT_CCLM_FLAG[slice], INIT_CCLM_FLAG[3]);
uvg_ctx_init(&cabac->ctx.cclm_model, QP, INIT_CCLM_MODEL[slice], INIT_CCLM_MODEL[3]);
for (i = 0; i < 3; i++) {
uvg_ctx_init(&cabac->ctx.cu_skip_flag_model[i], QP, INIT_SKIP_FLAG[slice][i], INIT_SKIP_FLAG[3][i]);
uvg_ctx_init(&cabac->ctx.joint_cb_cr[i], QP, INIT_JOINT_CB_CR_FLAG[slice][i], INIT_JOINT_CB_CR_FLAG[3][i]);
uvg_ctx_init(&cabac->ctx.lfnst_idx_model[i], QP, INIT_LFNST_IDX[slice][i], INIT_LFNST_IDX[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_sig_coeff_group[i], QP, INIT_TRANSFORM_SKIP_SIG_COEFF_GROUP[slice][i], INIT_TRANSFORM_SKIP_SIG_COEFF_GROUP[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_sig[i], QP, INIT_TRANSFORM_SKIP_SIG[slice][i], INIT_TRANSFORM_SKIP_SIG[3][i]);
}
for (i = 0; i < 4; i++) {
uvg_ctx_init(&cabac->ctx.sig_coeff_group_model[i], QP, INIT_SIG_COEFF_GROUP[slice][i], INIT_SIG_COEFF_GROUP[3][i]);
uvg_ctx_init(&cabac->ctx.mts_idx_model[i], QP, INIT_MTS_IDX[slice][i], INIT_MTS_IDX[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_gt1[i], QP, INIT_TRANSFORM_SKIP_GT1[slice][i], INIT_TRANSFORM_SKIP_GT1[3][i]);
}
for (i = 0; i < 5; i++) {
uvg_ctx_init(&cabac->ctx.transform_skip_gt2[i], QP, INIT_TRANSFORM_SKIP_GT2[slice][i], INIT_TRANSFORM_SKIP_GT2[3][i]);
uvg_ctx_init(&cabac->ctx.imv_flag[i], QP, INIT_IMV_FLAG[slice][i], INIT_IMV_FLAG[3][i]);
}
for (i = 0; i < 6; i++) {
uvg_ctx_init(&cabac->ctx.qt_split_flag_model[i], QP, INIT_QT_SPLIT_FLAG[slice][i], INIT_QT_SPLIT_FLAG[3][i]);
uvg_ctx_init(&cabac->ctx.alf_cc_filter_control_flag[i], QP, INIT_CC_ALF_FILTER_CONTROL_FLAG[slice][i], INIT_CC_ALF_FILTER_CONTROL_FLAG[3][i]);
uvg_ctx_init(&cabac->ctx.transform_skip_res_sign[i], QP, INIT_TRANSFORM_SKIP_RES_SIGN[slice][i], INIT_TRANSFORM_SKIP_RES_SIGN[3][i]);
}
for (i = 0; i < 9; i++) {
uvg_ctx_init(&cabac->ctx.split_flag_model[i], QP, INIT_SPLIT_FLAG[slice][i], INIT_SPLIT_FLAG[3][i]);
uvg_ctx_init(&cabac->ctx.alf_ctb_flag_model[i], QP, INIT_CTB_ALF_FLAG[slice][i], INIT_CTB_ALF_FLAG[3][i]);
}
//TODO: ignore P/B contexts on intra frame
uvg_ctx_init(&cabac->ctx.cu_pred_mode_model[0], QP, INIT_PRED_MODE[slice][0], INIT_PRED_MODE[3][0]);
uvg_ctx_init(&cabac->ctx.cu_pred_mode_model[1], QP, INIT_PRED_MODE[slice][1], INIT_PRED_MODE[3][1]);
uvg_ctx_init(&cabac->ctx.cu_qt_root_cbf_model, QP, INIT_QT_ROOT_CBF[slice][0], INIT_QT_ROOT_CBF[3][0]);
uvg_ctx_init(&cabac->ctx.mvp_idx_model, QP, INIT_MVP_IDX[slice][0], INIT_MVP_IDX[3][0]);
for (i = 0; i < 2; i++) {
uvg_ctx_init(&cabac->ctx.qt_cbf_model_cb[i], QP, INIT_QT_CBF[slice][i+4], INIT_QT_CBF[3][i+4]);
uvg_ctx_init(&cabac->ctx.cu_mvd_model[i], QP, INIT_MVD[slice][i], INIT_MVD[3][i]);
uvg_ctx_init(&cabac->ctx.cu_ref_pic_model[i], QP, INIT_REF_PIC[slice][i], INIT_REF_PIC[3][i]);
uvg_ctx_init(&cabac->ctx.luma_planar_model[i], QP, INIT_INTRA_LUMA_PLANAR_MODE[slice][i], INIT_INTRA_LUMA_PLANAR_MODE[3][i]);
uvg_ctx_init(&cabac->ctx.cu_qp_delta_abs[i], QP, INIT_CU_QP_DELTA_ABS[slice][i], INIT_CU_QP_DELTA_ABS[3][i]);
uvg_ctx_init(&cabac->ctx.alf_ctb_alternatives[i], QP, INIT_CTB_ALF_ALTERNATIVE[slice][i], INIT_CTB_ALF_ALTERNATIVE[3][i]);
}
for (i = 0; i < 3; i++) {
uvg_ctx_init(&cabac->ctx.qt_cbf_model_cr[i], QP, INIT_QT_CBF[slice][i + 6], INIT_QT_CBF[3][i + 6]);
uvg_ctx_init(&cabac->ctx.cu_ctx_last_y_chroma[i], QP, INIT_LAST_Y[slice][i + 20], INIT_LAST_Y[3][i + 20]);
uvg_ctx_init(&cabac->ctx.cu_ctx_last_x_chroma[i], QP, INIT_LAST_X[slice][i + 20], INIT_LAST_X[3][i + 20]);
}
for (i = 0; i < 4; i++) {
uvg_ctx_init(&cabac->ctx.part_size_model[i], QP, INIT_PART_SIZE[slice][i], INIT_PART_SIZE[3][i]);
uvg_ctx_init(&cabac->ctx.bdpcm_mode[i], QP, BDPCM_MODE_INIT[slice][i], BDPCM_MODE_INIT[3][i]);
uvg_ctx_init(&cabac->ctx.qt_cbf_model_luma[i], QP, INIT_QT_CBF[slice][i], INIT_QT_CBF[3][i]);
}
for (i = 0; i < 6; i++) {
uvg_ctx_init(&cabac->ctx.inter_dir[i], QP, INIT_INTER_DIR[slice][i], INIT_INTER_DIR[3][i]);
}
for (i = 0; i < 20; i++) {
uvg_ctx_init(&cabac->ctx.cu_ctx_last_y_luma[i], QP, INIT_LAST_Y[slice][i], INIT_LAST_Y[3][i]);
uvg_ctx_init(&cabac->ctx.cu_ctx_last_x_luma[i], QP, INIT_LAST_X[slice][i], INIT_LAST_X[3][i]);
}
for (ii = 0; ii < 3; ii++) {
for (i = 0; i < 12; i++) {
uvg_ctx_init(&cabac->ctx.cu_sig_model_luma[ii][i], QP, INIT_SIG_FLAG[ii*2][slice][i], INIT_SIG_FLAG[ii * 2][3][i]);
if (i < 8) uvg_ctx_init(&cabac->ctx.cu_sig_model_chroma[ii][i], QP, INIT_SIG_FLAG[ii*2+1][slice][i], INIT_SIG_FLAG[ii * 2 + 1][3][i]);
}
}
for (i = 0; i < 21; i++) {
uvg_ctx_init(&cabac->ctx.cu_parity_flag_model_luma[i], QP, INIT_PARITY_FLAG[0][slice][i], INIT_PARITY_FLAG[0][3][i]);
if (i < 11) uvg_ctx_init(&cabac->ctx.cu_parity_flag_model_chroma[i], QP, INIT_PARITY_FLAG[1][slice][i], INIT_PARITY_FLAG[1][3][i]);
}
for (ii = 0; ii < 2; ii++) {
for (i = 0; i < 21; i++) {
uvg_ctx_init(&cabac->ctx.cu_gtx_flag_model_luma[ii][i], QP, INIT_GTX_FLAG[ii * 2][slice][i], INIT_GTX_FLAG[ii * 2][3][i]);
if (i < 11) uvg_ctx_init(&cabac->ctx.cu_gtx_flag_model_chroma[ii][i], QP, INIT_GTX_FLAG[ii * 2 + 1][slice][i], INIT_GTX_FLAG[ii * 2 + 1][3][i]);
}
}
}
void uvg_context_copy(encoder_state_t * const target_state, const encoder_state_t * const source_state) {
cabac_data_t * const target_cabac = &target_state->cabac;
const cabac_data_t * const source_cabac = &source_state->cabac;
if (target_cabac == source_cabac) return;
target_cabac->ctx = source_cabac->ctx;
}
uint32_t uvg_context_get_sig_coeff_group( uint32_t *sig_coeff_group_flag,
uint32_t pos_x,
uint32_t pos_y,
int32_t width,
int32_t height)
{
uint32_t uiRight = 0;
uint32_t uiLower = 0;
uint32_t position = pos_y * width + pos_x;
if (pos_x + 1 < (uint32_t)width) uiRight = sig_coeff_group_flag[position + 1];
if (pos_y + 1 < (uint32_t)height) uiLower = sig_coeff_group_flag[position + width];
return uiRight || uiLower;
}
uint32_t uvg_context_get_sig_coeff_group_ts(uint32_t* sig_coeff_group_flag,
uint32_t pos_x,
uint32_t pos_y,
int32_t width)
{
uint32_t uiLeft = 0;
uint32_t uiAbove = 0;
uint32_t position = pos_y * width + pos_x;
if (pos_x > 0) uiLeft = sig_coeff_group_flag[position - 1];
if (pos_y > 0) uiAbove = sig_coeff_group_flag[position - width];
return uiLeft + uiAbove;
}
/**
* \brief Context derivation process of coeff_abs_significant_flag
* \param coeff pointer to the current coefficient
* \param pos_x column of current scan position
* \param pos_y row of current scan position
* \param width width of the block
* \param height height of the block
* \param type texture type (TEXT_LUMA...)
* \param temp_diag temporary output value used in the next steps
* \param temp_sum temporary output value used in the next steps
* \returns context index for current scan position
*/
uint32_t uvg_context_get_sig_ctx_idx_abs(const coeff_t* coeff, uint32_t pos_x, uint32_t pos_y,
uint32_t width, uint32_t height, int8_t color,
int32_t* temp_diag, int32_t* temp_sum)
{
const coeff_t* data = coeff + pos_x + pos_y * width;
const int diag = pos_x + pos_y;
int num_pos = 0;
int sum_abs = 0;
#define UPDATE(x) {int a=abs(x);sum_abs+=MIN(4+(a&1),a);num_pos+=(a?1:0);}
if (pos_x < width - 1)
{
UPDATE(data[1]);
if (pos_x < width - 2)
{
UPDATE(data[2]);
}
if (pos_y < height - 1)
{
UPDATE(data[width + 1]);
}
}
if (pos_y < height - 1)
{
UPDATE(data[width]);
if (pos_y < height - 2)
{
UPDATE(data[width << 1]);
}
}
#undef UPDATE
int ctx_ofs = MIN((sum_abs+1)>>1, 3) + (diag < 2 ? 4 : 0);
if (color == COLOR_Y)
{
ctx_ofs += diag < 5 ? 4 : 0;
}
*temp_diag = diag;
*temp_sum = sum_abs - num_pos;
return ctx_ofs;
}
uint32_t uvg_context_get_sig_ctx_idx_abs_ts(const coeff_t* coeff, int32_t pos_x, int32_t pos_y, uint32_t width)
{
const coeff_t* data = coeff + pos_x + pos_y * width;
int numPos = 0;
#define UPDATE(x) {coeff_t a=abs(x);numPos+=!!a;}
if (pos_x > 0)
{
UPDATE(data[-1]);
}
if (pos_y > 0)
{
UPDATE(data[-(int)width]);
}
#undef UPDATE
return numPos;
}
uint32_t uvg_sign_ctx_id_abs_ts(const coeff_t* coeff, int32_t pos_x, int32_t pos_y, int32_t width, int bdpcm)
{
const coeff_t* pData = coeff + pos_x + pos_y * width;
int rightSign = 0, belowSign = 0;
unsigned signCtx = 0;
#define SGN(val) ((0 < (val)) - ((val) < 0))
if (pos_x > 0)
{
rightSign = SGN(pData[-1]);
}
if (pos_y > 0)
{
belowSign = SGN(pData[-(int)width]);
}
#undef SGN
if ((rightSign == 0 && belowSign == 0) || ((rightSign * belowSign) < 0))
{
signCtx = 0;
}
else if (rightSign >= 0 && belowSign >= 0)
{
signCtx = 1;
}
else
{
signCtx = 2;
}
if (bdpcm)
{
signCtx += 3;
}
return signCtx;
}
int32_t uvg_derive_mod_coeff(int rightPixel, int belowPixel, coeff_t absCoeff, int bdpcm)
{
if (absCoeff == 0)
return 0;
int pred1, absBelow = abs(belowPixel), absRight = abs(rightPixel);
int absCoeffMod = absCoeff;
if (bdpcm == 0)
{
pred1 = MAX(absBelow, absRight);
if (absCoeffMod == pred1)
{
absCoeffMod = 1;
}
else
{
absCoeffMod = absCoeffMod < pred1 ? absCoeffMod + 1 : absCoeffMod;
}
}
return(absCoeffMod);
}
unsigned uvg_lrg1_ctx_id_abs_ts(const coeff_t* coeff, int32_t pos_x, int32_t pos_y, int32_t width, int bdpcm)
{
const coeff_t* posC = coeff + pos_x + pos_y * width;
int numPos = 0;
#define UPDATE(x) {coeff_t a=abs(x);numPos+=!!a;}
if (bdpcm)
{
numPos = 3;
}
else
{
if (pos_x > 0)
{
UPDATE(posC[-1]);
}
if (pos_y > 0)
{
UPDATE(posC[-width]);
}
}
#undef UPDATE
return numPos;
}
/**
* \brief Calculate slot of Go rice parameter for remainder coefficient value coding
* \param coeff pointer to the current coefficient
* \param pos_x column of current scan position
* \param pos_y row of current scan position
* \param width width of the block
* \param height height of the block
* \returns context go rice parameter
*/
uint32_t uvg_abs_sum(const coeff_t* coeff, uint32_t pos_x, uint32_t pos_y,
uint32_t width, uint32_t height, uint32_t baselevel)
{
#define UPDATE(x) sum+=abs(x)/*-(x?1:0)*/
const coeff_t* data = coeff + pos_x + pos_y * width;
int sum = 0;
if (pos_x < width - 1)
{
UPDATE(data[1]);
if (pos_x < width - 2)
{
UPDATE(data[2]);
}
if (pos_y < height - 1)
{
UPDATE(data[width + 1]);
}
}
if (pos_y < height - 1)
{
UPDATE(data[width]);
if (pos_y < height - 2)
{
UPDATE(data[width << 1]);
}
}
#undef UPDATE
return MAX(MIN(sum - 5 * (int32_t)baselevel, 31),0);
/*return MIN(sum, 31);*/
}
/**
* \brief Calculate Go rice parameter for remainder coefficient value coding
* \param coeff pointer to the current coefficient
* \param pos_x column of current scan position
* \param pos_y row of current scan position
* \param width width of the block
* \param height height of the block
* \returns context go rice parameter
*/
uint32_t uvg_go_rice_par_abs(const coeff_t* coeff, uint32_t pos_x, uint32_t pos_y,
uint32_t width, uint32_t height, uint32_t baselevel)
{
uint32_t check = uvg_abs_sum(coeff, pos_x, pos_y, width, height, baselevel);
return g_go_rice_pars[check];
}
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