/***************************************************************************
/*
    
    copyright            : (C) 2007 by mean
    email                : fixounet@free.fr
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "ADM_assert.h"
#include "ADM_default.h"
#include "ADM_editor/ADM_Video.h"

#include "fourcc.h"
#include "ADM_mp4.h"
#include "DIA_coreToolkit.h"

#include "ADM_osSupport/ADM_debugID.h"
#define MODULE_NAME MODULE_3GP
#include "ADM_osSupport/ADM_debug.h"

uint32_t sample2byte(WAVHeader *hdr,uint32_t sample);

#define MAX_CHUNK_SIZE (4*1024)
/**
        \fn indexify
        \brief build the index from the stxx atoms
*/
uint8_t	MP4Header::indexify(
                          MP4Track *track,   
                          uint32_t trackScale,
                         MPsampleinfo *info,
                         uint32_t isAudio,
                         uint32_t *outNbChunk)

{

uint32_t i,j,cur;

        printf("Build Track index\n");
	*outNbChunk=0;
	aprintf("+_+_+_+_+_+\n");
	aprintf("co : %lu sz: %lu sc: %lu co[0]%lu \n",info->nbCo,info->nbSz,info->nbSc,info->Co[0]);
	aprintf("+_+_+_+_+_+\n");

	ADM_assert(info->Sc);
	ADM_assert(info->Sn);
	ADM_assert(info->Co);
	if(!info->SzIndentical)
        {
          ADM_assert(info->Sz);
        }
        //*********************************************************
	// in that case they are all the same size, i.e.audio
        //*********************************************************
	if(info->SzIndentical && isAudio)// in that case they are all the same size, i.e.audio
	{
          
          
          uint32_t totalBytes=info->SzIndentical*info->nbSz;
          printf("All the same size : %u (total size %u bytes)\n",info->SzIndentical,totalBytes);
              //
              // Each chunk contains N samples=N bytes
              int samplePerChunk[info->nbCo];
              memset(samplePerChunk,0,info->nbCo*sizeof(int));
              int total=0;
              for( i=0;i<info->nbSc;i++)
              {

                  for(int j=info->Sc[i]-1;j<info->nbCo;j++)
                  {
                    uint32_t mx;
                        adm_printf(ADM_PRINT_VERY_VERBOSE,"For chunk %lu , %lu samples\n",j,info->Sn[i]);
                        samplePerChunk[j]=info->Sn[i];
                  }
              }
              /**/
              for(i=0;i<info->nbCo;i++)
                total+=samplePerChunk[i];
              
              printf("Total size in sample : %u\n",total);
              printf("Sample size          : %u\n",info->SzIndentical);
              track->index=new MP4Index[info->nbCo];
              memset(track->index,0,info->nbCo*sizeof(MP4Index));
              track->nbIndex=info->nbCo;;
              int max=0;
              totalBytes=0;
              if(info->SzIndentical!=1)
              {
                 for(i=0;i<info->nbCo;i++)
                    {
                        uint32_t sz;
                        track->index[i].offset=info->Co[i];
                        sz=samplePerChunk[i];
                        /* Sz is in sample, convert it to bytes */
                        sz=sz*info->SzIndentical;
                        /* */
                        track->index[i].size=sz;
                        track->index[i].time=0; // No seek
                        if(sz>MAX_CHUNK_SIZE)
                        {
                            max+=sz/MAX_CHUNK_SIZE;
                        }
                        
                        totalBytes+=track->index[i].size;
                    }
              }
              else
              {
                    for(i=0;i<info->nbCo;i++)
                    {
                        uint32_t sz;
      #define PACK_SIZE info->bytePerFrame // perPacket ??
                        
                        track->index[i].offset=info->Co[i];
                        sz=samplePerChunk[i];
                        /* Sz is in sample, convert it to bytes */
                        sz/=info->samplePerPacket;
                        if(sz*info->samplePerPacket!=samplePerChunk[i])
                        {
                          printf("Warning sample per packet not divider of sample per chunk (per packet :%u , chunk :%u)\n",
                                    info->samplePerPacket, samplePerChunk[i]); 
                        }
                        sz*=PACK_SIZE;
                        /* */
                        track->index[i].size=sz;
                        track->index[i].time=0; // No seek
                        if(sz>MAX_CHUNK_SIZE)
                        {
                            max+=sz/MAX_CHUNK_SIZE;
                        }
                        
                        totalBytes+=track->index[i].size;
                    }
              }
              printf("Found %u bytes\n",totalBytes);
              // Now time to update the time...
              // Normally they have all the same duration
              if(info->nbStts!=1) printf("WARNING: Same size, different duration\n");

              float sampleDuration,totalDuration=0;
              
                sampleDuration=info->SttsC[0];
                sampleDuration*=1000.*1000.;
                sampleDuration/=trackScale;    // Duration of one sample
                for(i=0;i<info->nbCo;i++)
                {
                        track->index[i].time=(uint64_t)floor(totalDuration);
                        totalDuration+=sampleDuration*samplePerChunk[i];
                        adm_printf(ADM_PRINT_VERY_VERBOSE,"Audio chunk : %lu time :%lu\n",i,track->index[i].time);
                }
                if(max && isAudio) // We have some big chunks we need to split them
                {
                      // rebuild a new index
                      printf("We have %u chunks but it should be split into \n",info->nbCo);
                      printf("around %u chunks. adjusting..(SzIdentical %u)\n",info->nbCo+max,info->SzIndentical);
                      uint32_t newNbCo=track->nbIndex+max*2; // *2 is enough, should be.
                      uint32_t w=0;
                      uint32_t one_go;

                        one_go=MAX_CHUNK_SIZE/info->SzIndentical;
                        one_go=one_go*info->SzIndentical;
                        printf("One go :%u\n",one_go);
                     MP4Index *newindex=new MP4Index[newNbCo];

                    int64_t time_increment=(int64_t)((one_go/info->SzIndentical)*sampleDuration);  // Nb sample*duration of one sample
                    for(i=0;i<track->nbIndex;i++)
                    {
                      uint32_t sz;
                          sz=track->index[i].size;
                          if(sz<MAX_CHUNK_SIZE)
                          {
                              memcpy(&(newindex[w]),&(track->index[i]),sizeof(MP4Index));
                              w++;
                              continue;
                          }
                          // We have to split it...
                          int part=0;
                          while(sz>one_go)
                          {
                                newindex[w].offset=track->index[i].offset+part*one_go;
                                newindex[w].size=one_go;
                                newindex[w].time=track->index[i].time+part*time_increment; 
                                ADM_assert(w<newNbCo);
                                w++;
                                part++;
                                sz-=one_go;
                          }
                          // The last one...
                                newindex[w].offset=track->index[i].offset+part*one_go;
                                newindex[w].size=sz;
                                newindex[w].time=track->index[i].time+part*time_increment+((time_increment*sz)/one_go); 
                                w++;
                    }
                    delete [] track->index;
                    track->index=newindex;
                    track->nbIndex=w;
                    total=0;
                    for(int i=0;i<track->nbIndex;i++)
                        total+=track->index[i].size;
                    printf("After split, we have %u bytes\n",total);
                }
          printf("Index done\n");
          return 1;
      }
          // Else we build an index per sample
          //
	
		
	// We have different packet size
	// Probably video
        track->index=new MP4Index[info->nbSz];
        memset(track->index,0,info->nbSz*sizeof(MP4Index));

        if(info->SzIndentical) // Video, all same size (DV ?)
        {
            adm_printf(ADM_PRINT_VERY_VERBOSE,"\t size for all %u frames : %u\n",info->nbSz,info->SzIndentical);
            for(i=0;i<info->nbSz;i++)
            {
                    track->index[i].size=info->SzIndentical;
                    
            }
          }
          else // Different size
          {
            for(i=0;i<info->nbSz;i++)
            {
                    track->index[i].size=info->Sz[i];
                    adm_printf(ADM_PRINT_VERY_VERBOSE,"\t size : %d : %u\n",i,info->Sz[i]);
            }
          }
	// if no sample to chunk we map directly
	// first build the # of sample per chunk table
        uint32_t totalchunk=0,max=0;

        // Search the maximum
        for(i=0;i<info->nbSc-1;i++)
        {
                totalchunk+=(info->Sc[i+1]-info->Sc[i])*info->Sn[i];
        }
        totalchunk+=(info->nbCo-info->Sc[info->nbSc-1]+1)*info->Sn[info->nbSc-1];

        adm_printf(ADM_PRINT_VERY_VERBOSE,"#of chunk %d max per chunk %d Max # of sample %d\n",info->nbCo,max,totalchunk);

        uint32_t chunkCount[totalchunk+1];
	for(i=0;i<info->nbSc;i++)
	{
		for(j=info->Sc[i]-1;j<info->nbCo;j++)
		{
			chunkCount[j]=info->Sn[i];
                        ADM_assert(j<=totalchunk);
		}
		adm_printf(ADM_PRINT_VERY_VERBOSE,"(%d) sc: %lu sn:%lu\n",i,info->Sc[i],info->Sn[i]);
	}
/*			for(j=0;j<nbSc;j++)
			{
				aprintf("\n count number : %d - %lu\n",j,Sn[j]);
			}*/
	// now we have for each chunk the number of sample in it
	cur=0;
	for(j=0;j<info->nbCo;j++)
	{
		int tail=0;
		adm_printf(ADM_PRINT_VERY_VERBOSE,"--starting at %lu , %lu to go\n",info->Co[j],chunkCount[j]);
		for(uint32_t k=0;k<chunkCount[j];k++)
		{
                        track->index[cur].offset=info->Co[j]+tail;
                        tail+=track->index[cur].size;
                        adm_printf(ADM_PRINT_VERY_VERBOSE," sample : %d offset : %lu\n",cur,track->index[cur].offset);
			adm_printf(ADM_PRINT_VERY_VERBOSE,"Tail : %lu\n",tail);
			cur++;
		}


	}
        
        
        track->nbIndex=cur;;
	
	
	// Now deal with duration
	// the unit is us FIXME, probably said in header
	// we put each sample duration in the time entry
	// then sum them up to get the absolute time position

        uint32_t nbChunk=track->nbIndex;
	if(info->nbStts)		//uint32_t nbStts,	uint32_t *SttsN,uint32_t SttsC,
	{
		uint32_t start=0;
		if(info->nbStts>1)
		{
			for(uint32_t i=0;i<info->nbStts;i++)
			{
				for(uint32_t j=0;j<info->SttsN[i];j++)
				{
                                        track->index[start].time=(uint64_t)info->SttsC[i];
					start++;
					ADM_assert(start<=nbChunk);
				}	
			}
		}
		else
		{
			// All same duration
			for(uint32_t i=0;i<nbChunk;i++)
                                track->index[i].time=(uint64_t)info->SttsC[0]; // this is not an error!
		
		}
		// now collapse
		uint64_t total=0;
		float    ftot;
		uint32_t thisone;
		
		for(uint32_t i=0;i<nbChunk;i++)
		{
                        thisone=track->index[i].time;
			ftot=total;
			ftot*=1000.*1000.;
			ftot/=trackScale;
                        track->index[i].time=(uint64_t)floor(ftot);
			total+=thisone;
                        adm_printf(ADM_PRINT_VERY_VERBOSE,"Audio chunk : %lu time :%lu\n",i,track->index[i].time);
		}
		// Time is now built, it is in us
	
	
	}
	else // there is not ssts
	{
          GUI_Error_HIG(QT_TR_NOOP("No stts table"), NULL);
		ADM_assert(0);	
	}
        printf("Index done\n");
	return 1;
}
/**
      \fn sample2byte
      \brief Convert the # of samples into the # of bytes needed
*/
uint32_t sample2byte(WAVHeader *hdr,uint32_t sample)
{
  float f;
        f=hdr->frequency; // 1 sec worth of data
        f=sample/f;       // in seconds
        f*=hdr->byterate; // in byte
    return (uint32_t)floor(f);
}
// EOF
