ref: 153a0311db8803ad7d2a4ae30b332cfdf08d7b13
dir: /codec/encoder/core/inc/vlc_encoder.h/
/*!
* \copy
* Copyright (c) 2013, Cisco Systems
* 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.
*
* 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 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef WELS_VLC_ENCODER_H__
#define WELS_VLC_ENCODER_H__
#include "bit_stream.h"
#include "svc_enc_golomb.h"
/************************************************************************/
/* VLC FOR WELS ENCODER */
/************************************************************************/
namespace WelsEnc {
//g_kuiVlcCoeffToken[uiNc][total-coeff][trailing-ones][0--value, 1--bit count]
extern const uint8_t g_kuiVlcCoeffToken[5][17][4][2];
extern const uint8_t g_kuiVlcLevelPrefix[15][2];
//g_kuiVlcTotalZeros[tzVlcIndex][uiTotalZeros][0--value, 1--bit count]
extern const uint8_t g_kuiVlcTotalZeros[16][16][2];
extern const uint8_t g_kuiVlcTotalZerosChromaDc[4][4][2];
//add for mgs
extern const uint8_t g_kuiVlcTotalZerosChromaDc422[8][8][2];
//g_kuiVlcRunBefore[zeros-left][run-before][0--value, 1--bit count]
extern const uint8_t g_kuiVlcRunBefore[8][15][2];
extern const ALIGNED_DECLARE (uint8_t, g_kuiEncNcMapTable[18], 16);
#define CHROMA_DC_NC_OFFSET 17
static inline int32_t WriteTotalCoeffTrailingones (SBitStringAux* pBs, uint8_t uiNc, uint8_t uiTotalCoeff,
uint8_t uiTrailingOnes) {
const uint8_t kuiNcIdx = g_kuiEncNcMapTable[uiNc];
const uint8_t* kpCoeffToken = &g_kuiVlcCoeffToken[kuiNcIdx][uiTotalCoeff][uiTrailingOnes][0];
return BsWriteBits (pBs, kpCoeffToken[1], kpCoeffToken[0]);
}
static inline int32_t WriteTotalcoeffTrailingonesChroma (SBitStringAux* pBs, uint8_t uiTotalCoeff,
uint8_t uiTrailingOnes) {
const uint8_t* kpCoeffToken = &g_kuiVlcCoeffToken[4][uiTotalCoeff][uiTrailingOnes][0];
return BsWriteBits (pBs, kpCoeffToken[1], kpCoeffToken[0]);
}
//kuiZeroCount = level_prefix;
static inline int32_t WriteLevelPrefix (SBitStringAux* pBs, const uint32_t kuiZeroCount) {
BsWriteBits (pBs, kuiZeroCount + 1, 1);
return 0;
}
static inline int32_t WriteTotalZeros (SBitStringAux* pBs, uint32_t uiTotalCoeff, uint32_t uiTotalZeros) {
const uint8_t* kpTotalZeros = &g_kuiVlcTotalZeros[uiTotalCoeff][uiTotalZeros][0];
return BsWriteBits (pBs, kpTotalZeros[1], kpTotalZeros[0]);
}
static inline int32_t WriteTotalZerosChromaDc (SBitStringAux* pBs, uint32_t uiTotalCoeff, uint32_t uiTotalZeros) {
const uint8_t* kpTotalZerosChromaDc = &g_kuiVlcTotalZerosChromaDc[uiTotalCoeff][uiTotalZeros][0];
return BsWriteBits (pBs, kpTotalZerosChromaDc[1], kpTotalZerosChromaDc[0]);
}
static inline int32_t WriteRunBefore (SBitStringAux* pBs, uint8_t uiZeroLeft, uint8_t uiRunBefore) {
const uint8_t* kpRunBefore = &g_kuiVlcRunBefore[uiZeroLeft][uiRunBefore][0];
return BsWriteBits (pBs, kpRunBefore[1], kpRunBefore[0]);
}
}
#endif