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More work on coeff coding

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This commit is contained in:
Marko Viitanen 2012-06-13 18:08:15 +03:00
parent 982170382b
commit 2e3c313932
4 changed files with 104 additions and 62 deletions
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14
src/cabac.c
View file

@ -80,7 +80,7 @@ uint8_t g_nextState[128][2];
cabac_data cabac;
void cxt_init(cabac_ctx* ctx, uint32_t qp, uint32_t initValue )
void ctx_init(cabac_ctx* ctx, uint32_t qp, uint32_t initValue )
{
int slope = (initValue>>4)*5 - 45;
int offset = ((initValue&15)<<3)-16;
@ -91,7 +91,7 @@ void cxt_init(cabac_ctx* ctx, uint32_t qp, uint32_t initValue )
}
void cxt_buildNextStateTable()
void ctx_buildNextStateTable()
{
int i,j;
for (i = 0; i < 128; i++)
@ -112,7 +112,7 @@ void cabac_init(cabac_data* data)
data->fracBits = 0;
data->binCountIncrement = 0;
data->uiBinsCoded = 0;
cxt_buildNextStateTable();
ctx_buildNextStateTable();
}
void cabac_start(cabac_data* data)
@ -133,9 +133,11 @@ void cabac_encodeBin(cabac_data* data, uint32_t binValue )
uiLPS = g_aucLPSTable[ CTX_STATE(data->ctx) ][ ( data->uiRange >> 6 ) & 3 ];
data->uiRange -= uiLPS;
#ifdef _DEBUG
printf("\tencodeBin m_uiRange %d uiLPS %d m_uiValue %d ", data->uiRange,uiLPS,data->uiLow);
#endif
//Not the Most Propable Symbol?
//Not the Most Probable Symbol?
if( binValue != CTX_MPS(data->ctx) )
{
int numBits = g_aucRenormTable[ uiLPS >> 3 ];
@ -151,7 +153,9 @@ void cabac_encodeBin(cabac_data* data, uint32_t binValue )
ctx_update_MPS(data->ctx);
if ( data->uiRange >= 256 )
{
#ifdef _DEBUG
printf("enduiValue %d \n",data->uiLow);
#endif
return;
}
@ -164,7 +168,9 @@ void cabac_encodeBin(cabac_data* data, uint32_t binValue )
{
cabac_write(data);
}
#ifdef _DEBUG
printf("enduiValue %d \n",data->uiLow);
#endif
}
void cabac_write(cabac_data* data)

5
src/cabac.h
View file

@ -30,8 +30,8 @@ typedef struct
#define CTX_STATE(ctx) (ctx->ucState>>1)
#define CTX_MPS(ctx) (ctx->ucState&1)
void cxt_init(cabac_ctx* ctx,uint32_t qp, uint32_t initValue );
void cxt_buildNextStateTable();
void ctx_init(cabac_ctx* ctx,uint32_t qp, uint32_t initValue );
void ctx_buildNextStateTable();
void ctx_update(cabac_ctx* ctx, int val );
//void ctx_update_LPS(cabac_ctx* ctx);
//void ctx_update_MPS(cabac_ctx* ctx);
@ -72,6 +72,7 @@ void cabac_encodeBinTrm(cabac_data* data, uint8_t binValue );
#define CABAC_BIN(data, value, name) { uint32_t prev_state = (data)->ctx->ucState;\
cabac_encodeBin(data, value); \
printf("%s = %d prev_state=%d state=%d\n",name,value,prev_state, (data)->ctx->ucState);}
#define CABAC_BINS_EP(data, value,bins, name) { uint32_t prev_state = (data)->ctx->ucState;\
cabac_encodeBinsEP(data, value,bins); \
printf("%s = %d prev_state=%d state=%d\n",name,value,prev_state, (data)->ctx->ucState);}

56
src/encoder.c
View file

@ -260,50 +260,56 @@ cabac_ctx g_QtCbfSCModelU[3];
//cabac_ctx g_QtCbfSCModelV[3];
cabac_ctx g_PartSizeSCModel;
cabac_ctx g_CUSigCoeffGroupSCModel[4];
cabac_ctx g_CUSigSCModel[45];
cabac_ctx g_CUSigSCModel_luma[24];
cabac_ctx g_CUSigSCModel_chroma[24];
cabac_ctx g_CuCtxLastY_luma[15];
cabac_ctx g_CuCtxLastY_chroma[15];
cabac_ctx g_CuCtxLastX_luma[15];
cabac_ctx g_CuCtxLastX_chroma[15];
void encode_slice_data(encoder_control* encoder)
{
uint16_t xCtb,yCtb,i;
/* Initialize contexts */
/* ToDo: add P/B slice */
cxt_init(&g_SplitFlagSCModel[0], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][0]);
cxt_init(&g_SplitFlagSCModel[1], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][1]);
cxt_init(&g_SplitFlagSCModel[2], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][2]);
ctx_init(&g_SplitFlagSCModel[0], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][0]);
ctx_init(&g_SplitFlagSCModel[1], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][1]);
ctx_init(&g_SplitFlagSCModel[2], encoder->QP, INIT_SPLIT_FLAG[SLICE_I][2]);
cxt_init(&g_IntraModeSCModel, encoder->QP, INIT_INTRA_PRED_MODE[SLICE_I]);
ctx_init(&g_IntraModeSCModel, encoder->QP, INIT_INTRA_PRED_MODE[SLICE_I]);
cxt_init(&g_ChromaPredSCModel[0], encoder->QP, INIT_CHROMA_PRED_MODE[SLICE_I][0]);
cxt_init(&g_ChromaPredSCModel[1], encoder->QP, INIT_CHROMA_PRED_MODE[SLICE_I][1]);
ctx_init(&g_ChromaPredSCModel[0], encoder->QP, INIT_CHROMA_PRED_MODE[SLICE_I][0]);
ctx_init(&g_ChromaPredSCModel[1], encoder->QP, INIT_CHROMA_PRED_MODE[SLICE_I][1]);
for(i = 0; i < 4; i++)
{
cxt_init(&g_TransSubdivSCModel[i], encoder->QP, INIT_TRANS_SUBDIV_FLAG[SLICE_I][i]);
cxt_init(&g_CUSigCoeffGroupSCModel[i], encoder->QP, INIT_SIG_CG_FLAG[SLICE_I][i]);
ctx_init(&g_TransSubdivSCModel[i], encoder->QP, INIT_TRANS_SUBDIV_FLAG[SLICE_I][i]);
ctx_init(&g_CUSigCoeffGroupSCModel[i], encoder->QP, INIT_SIG_CG_FLAG[SLICE_I][i]);
}
for(i = 0; i < 3; i++)
{
cxt_init(&g_QtCbfSCModelY[i], encoder->QP, INIT_QT_CBF[SLICE_I][i]);
cxt_init(&g_QtCbfSCModelU[i], encoder->QP, INIT_QT_CBF[SLICE_I][i+3]);
ctx_init(&g_QtCbfSCModelY[i], encoder->QP, INIT_QT_CBF[SLICE_I][i]);
ctx_init(&g_QtCbfSCModelU[i], encoder->QP, INIT_QT_CBF[SLICE_I][i+3]);
//cxt_init(&g_QtCbfSCModelV[i], encoder->QP, INIT_QT_CBF[SLICE_I][i]);
}
for(i = 0; i < 15; i++)
{
cxt_init(&g_CuCtxLastY_luma[i], encoder->QP, INIT_LAST[SLICE_I][i] );
cxt_init(&g_CuCtxLastX_luma[i], encoder->QP, INIT_LAST[SLICE_I][i] );
ctx_init(&g_CuCtxLastY_luma[i], encoder->QP, INIT_LAST[SLICE_I][i] );
ctx_init(&g_CuCtxLastX_luma[i], encoder->QP, INIT_LAST[SLICE_I][i] );
cxt_init(&g_CuCtxLastY_chroma[i], encoder->QP, INIT_LAST[SLICE_I][i+15] );
cxt_init(&g_CuCtxLastX_chroma[i], encoder->QP, INIT_LAST[SLICE_I][i+15] );
ctx_init(&g_CuCtxLastY_chroma[i], encoder->QP, INIT_LAST[SLICE_I][i+15] );
ctx_init(&g_CuCtxLastX_chroma[i], encoder->QP, INIT_LAST[SLICE_I][i+15] );
}
for(i = 0; i < 45; i++)
for(i = 0; i < 24; i++)
{
cxt_init(&g_CUSigSCModel[i], encoder->QP, INIT_SIG_FLAG[SLICE_I][i]);
ctx_init(&g_CUSigSCModel_luma[i], encoder->QP, INIT_SIG_FLAG[SLICE_I][i]);
if(i < 21)
{
ctx_init(&g_CUSigSCModel_chroma[i], encoder->QP, INIT_SIG_FLAG[SLICE_I][i+24]);
}
}
@ -460,7 +466,7 @@ void encode_coding_tree(encoder_control* encoder,uint16_t xCtb,uint16_t yCtb, ui
CABAC_BIN(&cabac,CbU,"cbf_chroma_u");
/* Non-zero chroma V Tcoeffs */
cabac.ctx = &g_QtCbfSCModelU[0];
/* Using the same ctx as before */
CABAC_BIN(&cabac,CbV,"cbf_chroma_v");
/* Non-zero luma Tcoeffs */
@ -472,6 +478,7 @@ void encode_coding_tree(encoder_control* encoder,uint16_t xCtb,uint16_t yCtb, ui
{
/* Residual Coding */
/* LastSignificantXY */
/* ToDo: separate to a function */
//encode_lastSignificantXY(uint8_t lastpos_x, uint8_t lastpos_y, uint8_t width, uint8_t height, uint8_t type, uint8_t scan)
uint8_t lastpos_x = 31, lastpos_y = 31;
uint8_t last_x = 1, last_y = 1;
@ -531,14 +538,23 @@ void encode_coding_tree(encoder_control* encoder,uint16_t xCtb,uint16_t yCtb, ui
}
/* end LastSignificantXY */
for(i = 15; i >= 0; i-- )
{
/* significant_coeff_flag */
cabac.ctx = &g_CUSigSCModel_luma[21]; /* 21 = uiCtxSig =TComTrQuant::getSigCtxInc( patternSigCtx, uiPosX, uiPosY, blockType, uiWidth, uiHeight, eTType );*/
CABAC_BIN(&cabac,0,"significant_coeff_flag");
}
for(i = 0; i < 8; i++)
{
/* significant_coeff_flag */
cabac.ctx = &g_CUSigSCModel_luma[8]; /* 8 = 4 * uiCtxSet */
CABAC_BIN(&cabac,0,"significant_coeff_flag");
}
/* end Residual Coding */
}
}

29
src/encoder.h
View file

@ -18,7 +18,7 @@
typedef struct encoder_control;
//ToDo: add ME data
/* ToDo: add ME data */
typedef struct
{
void (*IME)();
@ -41,6 +41,7 @@ typedef struct
uint8_t video_format;
} encoder_input;
/* Encoder control options, the main struct */
typedef struct
{
uint32_t frame;
@ -66,7 +67,9 @@ void encode_coding_tree(encoder_control* encoder,uint16_t xCtb,uint16_t yCtb, ui
static const uint8_t INIT_SPLIT_FLAG[3][3] =
{ { 107, 139, 126 }, { 107, 139, 126 }, { 139, 141, 157 } };
{ { 107, 139, 126 },
{ 107, 139, 126 },
{ 139, 141, 157 } };
static const uint8_t INIT_INTRA_PRED_MODE[3] = { 183,154,184 };
@ -91,9 +94,14 @@ static const uint8_t INIT_SIG_CG_FLAG[3][4] =
{ { 121, 140, 61, 154 }, { 121, 140, 61, 154 }, { 91, 171, 134, 141 } };
static const uint8_t INIT_SIG_FLAG[3][45] =
{{170,154,139,153,139,123,123, 63,124,153,153,152,152,152,137,152,137,137,166,183,140,136,153,154,170,153,138,138,122,121,122,121,167,153,167,136,121,122,136,121,122,91,151,183,140,},
{155,154,139,153,139,123,123, 63,153,153,153,152,152,152,137,152,137,122,166,183,140,136,153,154,170,153,123,123,107,121,107,121,167,153,167,136,149,107,136,121,122,91,151,183,140,},
{111,111,125,110,110, 94,124,108,124,139,139,139,168,124,138,124,138,107,107,125,141,179,153,125,140,139,182,182,152,136,152,136,153,182,137,149,192,152,224,136,31,136,136,139,111,} };
{{170,154,139,153,139,123,123, 63,124,153,153,152,152,152,137,152,137,137,166,183,140,136,153,
154,170,153,138,138,122,121,122,121,167,153,167,136,121,122,136,121,122, 91,151,183,140,},
{155,154,139,153,139,123,123, 63,153,153,153,152,152,152,137,152,137,122,166,183,140,136,153,
154,170,153,123,123,107,121,107,121,167,153,167,136,149,107,136,121,122, 91,151,183,140,},
{111,111,125,110,110, 94,124,108,124,139,139,139,168,124,138,124,138,107,107,125,141,179,153,
125,140,139,182,182,152,136,152,136,153,182,137,149,192,152,224,136, 31,136,136,139,111,} };
static const uint8_t INIT_LAST[3][30] =
{
@ -107,5 +115,16 @@ static const uint8_t INIT_LAST[3][30] =
static const uint8_t g_uiGroupIdx[ 32 ] = {0,1,2,3,4,4,5,5,6,6,6,6,7,7,7,7,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9};
static const uint8_t g_uiMinInGroup[ 10 ] = {0,1,2,3,4,6,8,12,16,24};
static const uint8_t g_sigLastScanCG32x32[ 64 ] =
{ 0, 8, 1,16, 9, 2,24,17,
10, 3,32,25,18,11, 4,40,
33,26,19,12, 5,48,41,34,
27,20,13, 6,56,49,42,35,
28,21,14, 7,57,50,43,36,
29,22,15,58,51,44,37,30,
23,59,52,45,38,31,60,53,
46,39,61,54,47,62,55,63 };
#endif