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/** \file     dtrace_next.h
 *  \brief    DTrace support for next software
 */

#pragma once

#if ENABLE_TRACING

#include "dtrace.h"

#include "CommonLib/CommonDef.h"

#include <cmath>

namespace vvdec
{


////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// DTRACE SHORT MANUAL
//
// 1. General info
//
// DTrace is a simple tracer that can be controlled at command line of the executable.
//
// Please have a look into command line parameter options to find the correspondent DTrace parameters.
// There are only two command-line parameters: tracing file and tracing rule.
// At initialization, DTrace-module parses the rule and set up the tracing context.
// The tracing context is stored in a global variable. All trace-outputs should use this global context.
//
// 2. Parameters
// 2.1 Tracing file (--TraceFile)
//
// Just a filename for a text-file.
// E.g.: --TraceFile="tracefile_rec.txt"
//
// 2.2 Tracing rule (--TraceRule)
//
// Tracing rule describes when during a runtime a particular output should be activated.
// Tracing rule consists of tracing channel(s) and tracing condition(s).
// The construction of the rule is: "channel_1,channel_2,...:condition_1,condition_2,..."
//
// Example for a tracing rule: --TraceRule="D_CABAC:poc==0"
// Here, tracing channel is D_CABAC and condition is poc==0, which means CABAC tracing output is activated at POC 0 only.
// You can also use poc>=2 or set the range like poc>=0,poc<=3 for example.
//
//
// 2.2.1 Tracing channel
//
// Channels are defined in dtrace_next.h. Users can add their own channels.
// Just put the channel definition into enum-list AND add it to the next_channels-table in the function tracing_init().
//
// 2.2.2 Tracing condition
//
// Currently supported: poc (the currently processed poc) and final ('0' if currently in RD-search, '1' if the current state is final)
// NOTE: Conditions are added and updated during runtime through DTRACE_UPDATE(...).
// It updates the DTrace internal state, so channels can be activated at the right moment.
// If it's not updated properly (at right place in the code, e.g. too late), the trace output can become wrong.
// For example, "poc"-condition should be updated at the start of the picture(AccesUnit).
// Please look into source code for how the "poc"-condition is used.
//
// 3. Using of DTrace macros
//
// The most used macro is DTRACE. It's like a printf-function with some additional parameters at the beginning.
// Format:
// DTRACE( tracing context, tracing channel, "..." [,params] );
// Example:
// DTRACE( g_trace_ctx, D_CABAC, "EP=%d \n", bin );
// There are also macros for output of buffers, picture components or conditional-outputs available. Please have a look into dtrace_next.h.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


// DTrace channels
// Use already defined channels or add your own tracing channels

enum DTRACE_CHANNEL
{
  D_COMMON,
  D_HEADER,               // header file infos
  D_NALUNITHEADER,        // NAL unit header infos
  D_RPSINFO,              // bits used to send the RPS
  D_REC_CB_LUMA,          // reconstructed coding block luma pixel
  D_REC_CB_CHROMA,        // reconstructed coding block chroma pixel
  D_REC_CB_LUMA_LF,       // reconstructed coding block luma pixel after deblocking filter
  D_REC_CB_CHROMA_LF,     // reconstructed coding block chroma pixel after deblocking filter
  D_REC_CB_LUMA_SAO,      // reconstructed coding block luma pixel after SAO filter
  D_REC_CB_CHROMA_SAO,    // reconstructed coding block chroma pixel after SAO filter
  D_REC_CB_LUMA_ALF,      // reconstructed coding block luma pixel after ALF filter
  D_REC_CB_CHROMA_ALF,    // reconstructed coding block chroma pixel after ALF filter
  D_ME,                   // Motion Estimation
  D_CABAC,                // CABAC engine
  D_SYNTAX,               // syntax
  D_SYNTAX_RESI,          // syntax of the residual coding
  D_BEST_MODE,            // Cost for coding mode (encoder only)
  D_MODE_COST,            // Cost for coding mode (encoder only)
  D_QP_PRED,              // QP Prediction for DQP process
  D_DQP,                  // Delta QP read/write
  D_QP,                   // final CU QP at reading/writing stage
  D_QP_PER_CTU,           // final QP per CTU at reading
  D_MISC,                 // Miscellaneous
  D_DECISIONTREE,         // decision tree tracing
  D_TU_ABS_SUM,
  D_EST_FRAC_BITS,
  D_INTRA_COST,           //intra cost
  D_PRED,
  D_RESIDUALS,
  D_TCOEFF,
  D_RDOQ,
  D_RDOQ_MORE,
  D_RDOQ_COST,
  D_TMP,
  D_CRC,
  D_CRC_LF
};
#define _CNL_DEF(_s) {_s,(std::string(#_s))}

static void tracing_uninit( CDTrace *pDtrace )
{
  if( pDtrace )
    delete pDtrace;
}


template< typename Tsrc >
void dtrace_block( CDTrace *trace_ctx, DTRACE_CHANNEL channel, Tsrc *buf, ptrdiff_t stride, unsigned block_w, unsigned block_h )
{
  unsigned i, j;
  for( j = 0; j < block_h; j++ )
  {
    for( i = 0; i < block_w; i++ )
    {
      trace_ctx->dtrace<false>( channel, "%04x ", buf[j*stride + i] );
      //trace_ctx->dtrace<false>( channel, "%4d ", buf[j*stride + i] );
    }
    trace_ctx->dtrace<false>( channel, "\n" );
  }
  trace_ctx->dtrace<false>( channel, "\n" );
}

template< typename Tsrc >
void dtrace_frame_blockwise( CDTrace *trace_ctx, DTRACE_CHANNEL channel, Tsrc *buf, ptrdiff_t stride, unsigned frm_w, unsigned frm_h, unsigned block_w, unsigned block_h )
{
  unsigned i, j, block;
  for( j = 0, block = 0; j < frm_h; j += block_h )
  {
    unsigned blockhf = std::min( block_h, frm_h - j);
    Tsrc *p_buf = buf + j*stride;
    for( i = 0; i < frm_w; i += block_w, block++ )
    {
      unsigned blockwf = std::min( block_w, frm_w - i);

      trace_ctx->dtrace<false>( channel, "Frame BLOCK=%d (x,y) = (%d, %d)\n", block, i, j );
      dtrace_block( trace_ctx, channel, p_buf, stride, blockwf, blockhf );
      p_buf += block_w;
    }
  }
}

#define DTRACE( ctx, channel, ... )           ( ctx         ? ctx->dtrace<true>( channel, __VA_ARGS__ )        : void() )
#define DTRACE_WITHOUT_COUNT(ctx,channel,...) ( ctx         ? ctx->dtrace<false>( channel, __VA_ARGS__ )       : void() )
#define DTRACE_DECR_COUNTER(ctx,channel)      ( ctx         ? ctx->decrementChannelCounter( channel )          : void() )
#define DTRACE_UPDATE(ctx,s)                  ( ctx         ? ctx->update(s)                                   : false  )
#define DTRACE_REPEAT(ctx,channel,times,...)  ( ctx         ? ctx->dtrace_repeat( channel, times,__VA_ARGS__ ) : void() )
#define DTRACE_COND(cond,ctx,channel,...)     ( ctx && cond ? ctx->dtrace<true>( channel, __VA_ARGS__ )        : void() )
#define DTRACE_BLOCK(ctx,...)                 ( ctx         ? dtrace_block(ctx,__VA_ARGS__)                    : void() )
#define DTRACE_FRAME_BLOCKWISE(ctx,...)       ( ctx         ? dtrace_frame_blockwise(ctx,__VA_ARGS__)          : void() )
#define DTRACE_GET_COUNTER(ctx,channel)       ( ctx         ? ctx->getChannelCounter(channel)                  : 0      )

static CDTrace* tracing_init( const std::string& sTracingFile, const std::string& sTracingRule )
{
  const dtrace_channels_t channels {
    _CNL_DEF( D_COMMON ),
    _CNL_DEF( D_HEADER ),
    _CNL_DEF( D_NALUNITHEADER ),
    _CNL_DEF( D_RPSINFO ),
    _CNL_DEF( D_REC_CB_LUMA ),
    _CNL_DEF( D_REC_CB_CHROMA ),
    _CNL_DEF( D_REC_CB_LUMA_LF ),
    _CNL_DEF( D_REC_CB_CHROMA_LF ),
    _CNL_DEF( D_REC_CB_LUMA_SAO ),
    _CNL_DEF( D_REC_CB_CHROMA_SAO ),
    _CNL_DEF( D_REC_CB_LUMA_ALF ),
    _CNL_DEF( D_REC_CB_CHROMA_ALF ),
    _CNL_DEF( D_ME ),
    _CNL_DEF( D_CABAC ),
    _CNL_DEF( D_SYNTAX ),
    _CNL_DEF( D_SYNTAX_RESI ),
    _CNL_DEF( D_BEST_MODE ),
    _CNL_DEF( D_MODE_COST ),
    _CNL_DEF( D_QP_PRED ),
    _CNL_DEF( D_DQP ),
    _CNL_DEF( D_QP ),
    _CNL_DEF( D_QP_PER_CTU ),
    _CNL_DEF( D_MISC ),
    _CNL_DEF( D_DECISIONTREE ),
    _CNL_DEF( D_TU_ABS_SUM ),
    _CNL_DEF( D_EST_FRAC_BITS ),
    _CNL_DEF( D_INTRA_COST ),
    _CNL_DEF( D_PRED ),
    _CNL_DEF( D_RESIDUALS ),
    _CNL_DEF( D_TCOEFF ),
    _CNL_DEF( D_RDOQ ),
    _CNL_DEF( D_RDOQ_MORE ),
    _CNL_DEF( D_RDOQ_COST ),
    _CNL_DEF( D_TMP ),
    _CNL_DEF( D_CRC ),
    _CNL_DEF( D_CRC_LF )
  };

  if( !sTracingFile.empty() || !sTracingRule.empty() )
  {
    msg( VERBOSE, "\n" );
    msg( VERBOSE, "Tracing is enabled: %s : %s\n", sTracingFile.c_str(), sTracingRule.c_str() );
  }

  CDTrace *pDtrace = new CDTrace( sTracingFile, sTracingRule, channels );
  if( pDtrace->getLastError() )
  {
    msg( WARNING, "%s\n", pDtrace->getErrMessage().c_str() );
    // don't return NULL, so we can still print the channels list
    //return NULL;
  }

  return pDtrace;
}

}   // namespace vvdec

#else   // !ENABLE_TRACING

#define DTRACE(ctx,channel,...)               {}
#define DTRACE_WITHOUT_COUNT(ctx,channel,...) {}
#define DTRACE_DECR_COUNTER(ctx,channel)      {}
#define DTRACE_UPDATE(ctx,s)                  {}
#define DTRACE_REPEAT(ctx,channel,times,...)  {}
#define DTRACE_COND(cond,level,...)           {}
#define DTRACE_BLOCK(...)                     {}
#define DTRACE_FRAME_BLOCKWISE(...)           {}
#define DTRACE_GET_COUNTER(ctx,channel)       {}

#endif   // !ENABLE_TRACING
