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Fixed some CABAC bugs and more work on coding tree

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This commit is contained in:
Marko Viitanen 2012-06-07 17:38:28 +03:00
parent 953c04d896
commit 925f4020cd
7 changed files with 86 additions and 31 deletions
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2
src/bitstream.h
View file

@ -50,7 +50,7 @@ void init_exp_golomb(uint32_t len);
static int WRITE_VALUE = 0;
#define WRITE_U(stream, data, bits, name) { printf("%8d %-40s u(%d) : %d\n",WRITE_VALUE, name,bits,data); bitstream_put(stream,data,bits); WRITE_VALUE++;}
#define WRITE_UE(stream, data, name) { printf("%8d %-40s ue(v): %d\n",WRITE_VALUE, name,data); bitstream_put_ue(stream,data); WRITE_VALUE++;}
#define WRITE_SE(stream, data, name) { printf("%8d %-40s se(v): %d\n",WRITE_VALUE, name,data); bitstream_put_se(stream,data); WRITE_VALUE++;}
#define WRITE_SE(stream, data, name) { printf("%8d %-40s se(v): %d\n",WRITE_VALUE, name,data); bitstream_put_se(stream,(data)); WRITE_VALUE++;}
#else
#define WRITE_U(stream, data, bits, name) { bitstream_put(stream,data,bits); }
#define WRITE_UE(stream, data, name) { bitstream_put_ue(stream,data); }

12
src/cabac.c
View file

@ -84,7 +84,7 @@ void cxt_init(cabac_ctx* ctx, uint32_t qp, uint32_t initValue )
{
int slope = (initValue>>4)*5 - 45;
int offset = ((initValue&15)<<3)-16;
int initState = MIN( MAX( 1, ( ( ( slope * qp ) >> 4 ) + offset ) ), 126 );
int initState = MIN( MAX( 1, ( ( ( slope * (int)qp ) >> 4 ) + offset ) ), 126 );
uint8_t mpState = (initState >= 64 )?1:0;
ctx->ucState = ( (mpState? (initState - 64):(63 - initState)) <<1) + mpState;
ctx->binsCoded = 0;
@ -129,10 +129,11 @@ void cabac_encodeBin(cabac_data* data, uint32_t binValue )
{
uint32_t uiLPS;
data->uiBinsCoded += data->binCountIncrement;
data->ctx.binsCoded = 1;
data->ctx->binsCoded = 1;
uiLPS = g_aucLPSTable[ CTX_STATE(data->ctx) ][ ( data->uiRange >> 6 ) & 3 ];
uiLPS = g_aucLPSTable[ CTX_STATE(data->ctx) ][ ( data->uiRange >> 6 ) -4 ];
data->uiRange -= uiLPS;
/*printf("\tdecodeBin m_uiRange %d uiLPS %d m_uiValue%d \n", data->uiRange,uiLPS,data->uiLow);*/
if( binValue != CTX_MPS(data->ctx) )
{
@ -140,13 +141,13 @@ void cabac_encodeBin(cabac_data* data, uint32_t binValue )
data->uiLow = ( data->uiLow + data->uiRange ) << numBits;
data->uiRange = uiLPS << numBits;
ctx_update_LPS(&data->ctx);
ctx_update_LPS(data->ctx);
data->bitsLeft -= numBits;
}
else
{
ctx_update_MPS(&data->ctx);
ctx_update_MPS(data->ctx);
if ( data->uiRange >= 256 )
{
return;
@ -251,6 +252,7 @@ void cabac_finish(cabac_data* data)
*/
void cabac_encodeBinTrm(cabac_data* data, uint32_t binValue )
{
printf("\tdecodeBin m_uiRange %d uivalue %d\n", data->uiRange, data->uiLow);
data->uiBinsCoded += data->binCountIncrement;
data->uiRange -= 2;
if( binValue )

16
src/cabac.h
View file

@ -27,8 +27,8 @@ typedef struct
uint32_t binsCoded;
} cabac_ctx;
#define CTX_STATE(ctx) (ctx.ucState>>1)
#define CTX_MPS(ctx) (ctx.ucState&1)
#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();
@ -38,7 +38,7 @@ void ctx_update_MPS(cabac_ctx* ctx);
typedef struct
{
cabac_ctx ctx;
cabac_ctx *ctx;
uint32_t uiLow;
uint32_t uiRange;
uint32_t bufferedByte;
@ -52,6 +52,7 @@ typedef struct
extern cabac_data cabac;
void cabac_start(cabac_data* data);
void cabac_init(cabac_data* data);
void cabac_encodeBin(cabac_data* data, uint32_t binValue );
void cabac_encodeFlush(cabac_data* data, uint8_t end );
@ -60,6 +61,15 @@ void cabac_encodeBinsEP(cabac_data* data, uint32_t binValues, int numBins );
void cabac_write(cabac_data* data);
void cabac_finish(cabac_data* data);
void cabac_flush(cabac_data* data);
void cabac_encodeBinTrm(cabac_data* data, uint32_t binValue );
#ifdef _DEBUG
#define CABAC_BIN(data, value, name) { uint32_t prev_state = (data)->ctx->ucState;\
cabac_encodeBin(data, value); \
printf("\%s = %d\tprev_state=%d\tstate=%d\n",name,split_flag,prev_state, (data)->ctx->ucState);}
#else
#define CABAC_BIN(data, value, name) cabac_encodeBin(data, value);
#endif
#endif

1
src/encmain.c
View file

@ -121,6 +121,7 @@
/* input init */
encoder->frame = 0;
encoder->QP = 1;
init_encoder_input(&encoder->in, input, cfg->width, cfg->height);
/* Start coding cycle */

77
src/encoder.c
View file

@ -25,7 +25,11 @@
#include "picture.h"
#include "nal.h"
void init_encoder_control(encoder_control* control,bitstream* output) {control->stream = output;};
void init_encoder_control(encoder_control* control,bitstream* output)
{
control->stream = output;
}
void init_encoder_input(encoder_input* input,FILE* inputfile, uint32_t width, uint32_t height)
{
input->file = inputfile;
@ -46,7 +50,7 @@ void init_encoder_input(encoder_input* input,FILE* inputfile, uint32_t width, ui
input->cur_pic.yData = (uint8_t *)malloc(width*height);
input->cur_pic.uData = (uint8_t *)malloc((width*height)>>2);
input->cur_pic.vData = (uint8_t *)malloc((width*height)>>2);
};
}
void encode_one_frame(encoder_control* encoder)
@ -67,6 +71,7 @@ void encode_one_frame(encoder_control* encoder)
bitstream_clear_buffer(encoder->stream);
cabac_start(&cabac);
encode_slice_header(encoder);
encode_slice_data(encoder);
cabac_flush(&cabac);
@ -77,6 +82,7 @@ void encode_one_frame(encoder_control* encoder)
}
else
{
/*
encode_slice_header(encoder);
encode_slice_data(encoder);
cabac_flush(&cabac);
@ -84,8 +90,8 @@ void encode_one_frame(encoder_control* encoder)
bitstream_flush(encoder->stream);
nal_write(encoder->output, encoder->stream->buffer, encoder->stream->buffer_pos, 0, NAL_IDR_SLICE, 0);
bitstream_clear_buffer(encoder->stream);
*/
}
}
void encode_pic_parameter_set(encoder_control* encoder)
@ -104,7 +110,7 @@ void encode_pic_parameter_set(encoder_control* encoder)
WRITE_UE(encoder->stream, 0, "num_ref_idx_l0_default_active_minus1");
WRITE_UE(encoder->stream, 0, "num_ref_idx_l1_default_active_minus1");
*/
WRITE_SE(encoder->stream, 0, "pic_init_qp_minus26");
WRITE_SE(encoder->stream, encoder->QP-26, "pic_init_qp_minus26");
WRITE_U(encoder->stream, 0, 1, "constrained_intra_pred_flag");
WRITE_U(encoder->stream, 0, 1, "enable_temporal_mvp_flag");
WRITE_U(encoder->stream, 0, 2, "slice_granularity");
@ -139,23 +145,23 @@ void encode_seq_parameter_set(encoder_control* encoder)
WRITE_U(encoder->stream, 7, 4, "pcm_bit_depth_luma_minus1");
WRITE_U(encoder->stream, 7, 4, "pcm_bit_depth_chroma_minus1");
WRITE_U(encoder->stream, 0, 1, "qpprime_y_zero_transquant_bypass_flag");
WRITE_UE(encoder->stream, 0, "log2_max_pic_order_cnt_lsb_minus4");
WRITE_UE(encoder->stream, 4, "log2_max_pic_order_cnt_lsb_minus4");
WRITE_UE(encoder->stream, 0, "max_dec_pic_buffering");
WRITE_UE(encoder->stream, 0, "num_reorder_pics");
WRITE_UE(encoder->stream, 0, "max_latency_increase");
WRITE_U(encoder->stream, 0, 1, "restricted_ref_pic_lists_flag");
WRITE_UE(encoder->stream, 0, "log2_min_coding_block_size_minus3");
WRITE_UE(encoder->stream, 3, "log2_diff_max_min_coding_block_size");
WRITE_UE(encoder->stream, 1, "log2_min_coding_block_size_minus3");
WRITE_UE(encoder->stream, 2, "log2_diff_max_min_coding_block_size");
WRITE_UE(encoder->stream, 0, "log2_min_transform_block_size_minus2");
WRITE_UE(encoder->stream, 3, "log2_diff_max_min_transform_block_size");
//If log2MinCUSize == 3
WRITE_U(encoder->stream, 0, 1, "DisInter4x4");
//WRITE_U(encoder->stream, 0, 1, "DisInter4x4");
//IF PCM
{
WRITE_UE(encoder->stream, 0, "log2_min_pcm_coding_block_size_minus3");
WRITE_UE(encoder->stream, 0, "log2_diff_max_min_pcm_coding_block_size");
WRITE_UE(encoder->stream, 2, "log2_diff_max_min_pcm_coding_block_size");
}
@ -172,7 +178,7 @@ void encode_seq_parameter_set(encoder_control* encoder)
WRITE_U(encoder->stream, 0, 1, "sample_adaptive_offset_enabled_flag");
WRITE_U(encoder->stream, 0, 1, "adaptive_loop_filter_enabled_flag");
//IF PCM
WRITE_U(encoder->stream, 0, 1, "pcm_loop_filter_disable_flag");
WRITE_U(encoder->stream, 1, 1, "pcm_loop_filter_disable_flag");
//endif
WRITE_U(encoder->stream, 0, 1, "temporal_id_nesting_flag");
WRITE_UE(encoder->stream, 0, "num_short_term_ref_pic_sets");
@ -214,12 +220,21 @@ void encode_slice_header(encoder_control* encoder)
}
cabac_ctx SplitFlagSCModel;
cabac_ctx PCMFlagSCModel;
cabac_ctx PartSizeSCModel;
void encode_slice_data(encoder_control* encoder)
{
uint16_t xCtb,yCtb;
cxt_init(&SplitFlagSCModel, 26, 0);
cxt_init(&cabac.ctx, 26, 0);
cxt_init(&SplitFlagSCModel, encoder->QP, 107);
cxt_init(&PCMFlagSCModel, encoder->QP, 0);
cxt_init(&PartSizeSCModel, encoder->QP, 0);
//SplitFlagSCModel.ucState = 15;
PCMFlagSCModel.ucState = 0;
PartSizeSCModel.ucState = 0;
//cxt_init(&cabac.ctx, 26, 87);
for(yCtb = 0; yCtb < encoder->in.height_in_LCU; yCtb++)
{
for(xCtb = 0; xCtb < encoder->in.width_in_LCU; xCtb++)
@ -232,20 +247,46 @@ void encode_slice_data(encoder_control* encoder)
void encode_coding_tree(encoder_control* encoder,uint16_t xCtb,uint16_t yCtb, uint8_t depth)
{
//Split flag
cabac_encodeBin(&cabac, 5);
int i;
uint8_t split_flag = (depth!=1)?1:0;
cabac.ctx = &SplitFlagSCModel;
CABAC_BIN(&cabac, split_flag, "SplitFlag");
if(split_flag)
{
encode_coding_tree(encoder,xCtb,yCtb,depth+1);
encode_coding_tree(encoder,xCtb+1,yCtb,depth+1);
encode_coding_tree(encoder,xCtb,yCtb+1,depth+1);
encode_coding_tree(encoder,xCtb+1,yCtb+1,depth+1);
return;
}
/* coding_unit( x0, y0, log2CbSize ) */
/* prediction_unit 2Nx2N*/
//if !intra PREDMODE
//PartSize
//cabac.ctx = &PartSizeSCModel;
//CABAC_BIN(&cabac, 1, "PartSize");
//If MODE_INTRA
cabac.ctx = &PCMFlagSCModel;
cabac_encodeBinTrm(&cabac, 1);
printf("\tIPCMFlag = 1\n");
cabac_finish(&cabac);
WRITE_U(cabac.stream, 1, 1, "stop_bit");
WRITE_U(cabac.stream, 0, 1, "stop_bit");
//WRITE_U(cabac.stream, 0, 3, "num_subsequent_pcm");
bitstream_align(cabac.stream);
/* PCM sample */
for(i = 0; i < 16*16; i++)
{
bitstream_put(cabac.stream, 125, 8);
}
/* end PCM sample
//endif
/* end prediction unit */
cabac_encodeBin(&cabac, 0); //prev_intra_luma_pred_flag
//cabac_encodeBin(&cabac, 0); //prev_intra_luma_pred_flag
cabac_encodeBin(&cabac, 1); //rem_intra_luma_pred_mode
//cabac_encodeBin(&cabac, 1); //rem_intra_luma_pred_mode
/* end coding_unit */

1
src/encoder.h
View file

@ -47,6 +47,7 @@ typedef struct
bitstream* stream;
FILE *output;
picture_list *ref;
uint8_t QP;
} encoder_control;
void init_encoder_control(encoder_control* control,bitstream* output);

4
src/global.h
View file

@ -20,8 +20,8 @@
#include <stdint.h>
#endif
#define MAX(a,b) (((a)<(b))?(b):(a))
#define MIN(a,b) (((a)>(b))?(b):(a))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define MIN(a,b) (((a)<(b))?(a):(b))
#define LCU_WIDTH 64 /*!< Largest Coding Unit */