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remux.c

/*
 *  dvb-mpegtools for the Siemens Fujitsu DVB PCI card
 *
 * Copyright (C) 2000, 2001 Marcus Metzler 
 *            for convergence integrated media GmbH
 * Copyright (C) 2002 Marcus Metzler 
 * 
 * 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.
 * 

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 * 

 * The author can be reached at mocm@metzlerbros.de, 
 */

#include "remux.h"

unsigned int bitrates[3][16] =
{{0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0},
 {0,32,48,56,64,80,96,112,128,160,192,224,256,320,384,0},
 {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,0}};

uint32_t freq[4] = {441, 480, 320, 0};
static uint32_t samples[4] = { 384, 1152, 0, 0};
char *frames[3] = {"I-Frame","P-Frame","B-Frame"};


void copy_ptslm(PTS_List *a, PTS_List *b)
{
      a->pos  = b->pos;
      a->PTS  = b->PTS;
      a->dts  = b->dts;
      a->spos = b->spos;
}

void clear_ptslm(PTS_List *a)
{
      a->pos  = 0;
      a->PTS  = 0;
      a->dts  = 0;
      a->spos = 0;      
}

void init_ptsl(PTS_List *ptsl)
{
      int i;
      for (i=0;i< MAX_PTS;i++){
            clear_ptslm(&ptsl[i]);
      }
}

int del_pts(PTS_List *ptsl, int pos, int nr)
{
      int i;
      int del = 0;

      for( i = 0; i < nr-1; i++){
            if(pos > ptsl[i].pos && pos >= ptsl[i+1].pos) del++;
      }

      if(del)
            for( i = 0; i < nr-del; i++){
                  copy_ptslm(&ptsl[i], &ptsl[i+del]);
            }

      return nr-del;
}

int del_ptss(PTS_List *ptsl, int pts, int *nb)
{
      int i;
      int del = 0;
      int sum = 0;
      int nr = *nb;

      for( i = 0; i < nr; i++){
            if(pts > ptsl[i].PTS){
                  del++;
                  sum += ptsl[i].pos;
            }
      }

      if(del)
            for( i = 0; i < nr-del; i++){
                  copy_ptslm(&ptsl[i], &ptsl[i+del]);
            }

      *nb = nr-del;
      return sum;
}

int add_pts(PTS_List *ptsl, uint32_t pts, int pos, int spos, int nr, uint32_t dts)
{
      int i;

      for ( i=0;i < nr; i++) if (spos &&  ptsl[i].pos == pos) return nr;
      if (nr == MAX_PTS) {
            nr = del_pts(ptsl, ptsl[1].pos+1, nr);
      } else nr++;
      i = nr-1;
      
      ptsl[i].pos  = pos;
      ptsl[i].spos = spos;
      ptsl[i].PTS  = pts;
      ptsl[i].dts  = dts;
      return nr;
}

void add_vpts(Remux *rem, uint8_t *pts)
{
      uint32_t PTS = trans_pts_dts(pts);
      rem->vptsn = add_pts(rem->vpts_list, PTS, rem->vwrite, rem->awrite,
                       rem->vptsn, PTS);
}

void add_apts(Remux *rem, uint8_t *pts)
{
      uint32_t PTS = trans_pts_dts(pts);
      rem->aptsn = add_pts(rem->apts_list, PTS, rem->awrite, rem->vwrite,
                       rem->aptsn, PTS);
}

void del_vpts(Remux *rem)
{
      rem->vptsn = del_pts(rem->vpts_list, rem->vread, rem->vptsn);
}

void del_apts(Remux *rem)
{
      rem->aptsn = del_pts(rem->apts_list, rem->aread, rem->aptsn);
}


void copy_framelm(FRAME_List *a, FRAME_List *b)
{
      a->type  = b->type;
      a->pos   = b->pos;
      a->FRAME = b->FRAME;
      a->time  = b->time;
      a->pts   = b->pts;
      a->dts   = b->dts;
}

void clear_framelm(FRAME_List *a)
{
      a->type  = 0;
      a->pos   = 0;
      a->FRAME = 0;
      a->time  = 0; 
      a->pts   = 0; 
      a->dts   = 0; 
}

void init_framel(FRAME_List *framel)
{
      int i;
      for (i=0;i< MAX_FRAME;i++){
            clear_framelm(&framel[i]);
      }
}

int del_frame(FRAME_List *framel, int pos, int nr)
{
      int i;
      int del = 0;

      for( i = 0; i < nr-1; i++){
            if(pos > framel[i].pos && pos >= framel[i+1].pos) del++;
      }

      if(del)
            for( i = 0; i < nr-del; i++){
                  copy_framelm(&framel[i], &framel[i+del]);
            }

      return nr-del;
}

int add_frame(FRAME_List *framel, uint32_t frame, int pos, int type, int nr, 
            uint32_t time, uint32_t pts, uint32_t dts)
{
      int i;

      if (nr == MAX_FRAME) {
            nr = del_frame(framel, framel[1].pos+1, nr);
      } else nr++;
      i = nr-1;
      
      framel[i].type  = type;
      framel[i].pos   = pos;
      framel[i].FRAME = frame;
      framel[i].time  = time;
      framel[i].pts   = pts;
      framel[i].dts   = dts;
      return nr;
}

void add_vframe(Remux *rem, uint32_t frame, long int pos, int type, int time, 
            uint32_t pts, uint32_t dts)
{
      rem->vframen = add_frame(rem->vframe_list, frame, pos, type,
                         rem->vframen, time, pts, dts);
}

void add_aframe(Remux *rem, uint32_t frame, long int pos, uint32_t pts)
{
      rem->aframen = add_frame(rem->aframe_list, frame, pos, 0, 
                         rem->aframen, 0, pts, pts);
}

void del_vframe(Remux *rem)
{
      rem->vframen = del_frame(rem->vframe_list, rem->vread, rem->vframen);
}

void del_aframe(Remux *rem)
{
      rem->aframen = del_frame(rem->aframe_list, rem->aread, rem->aframen);
}


void printpts(uint32_t pts)
{
      fprintf(stderr,"%2d:%02d:%02d.%03d",
            (int)(pts/90000.)/3600,
            ((int)(pts/90000.)%3600)/60,
            ((int)(pts/90000.)%3600)%60,
            (((int)(pts/90.)%3600000)%60000)%1000
            );
}


void find_vframes( Remux *rem, uint8_t *buf, int l)
{
      int c = 0;
      int type;
      uint32_t time = 0;
      int hour;
      int min;
      int sec;
      uint64_t pts=0;
      uint64_t dts=0;
      uint32_t tempref = 0;

      while ( c < l - 6){
            if (buf[c] == 0x00 && 
                buf[c+1] == 0x00 &&
                buf[c+2] == 0x01 && 
                buf[c+3] == 0xB8) {
                  c += 4;
                  hour = (int)((buf[c]>>2)& 0x1F);
                  min  = (int)(((buf[c]<<4)& 0x30)| 
                             ((buf[c+1]>>4)& 0x0F));
                  sec  = (int)(((buf[c+1]<<3)& 0x38)|
                              ((buf[c+2]>>5)& 0x07));
  
                  time = 3600*hour + 60*min + sec;
                  if ( rem->time_off){
                        time = (uint32_t)((uint64_t)time - rem->time_off);
                        hour = time/3600;
                        min  = (time%3600)/60;
                        sec  = (time%3600)%60;
                        /*
                        buf[c]   |= (hour & 0x1F) << 2;
                        buf[c]   |= (min & 0x30) >> 4;
                        buf[c+1] |= (min & 0x0F) << 4;
                        buf[c+1] |= (sec & 0x38) >> 3;
                        buf[c+2] |= (sec & 0x07) >> 5;*/
                  }
                  rem->group++;
                  rem->groupframe = 0;
            }
            if ( buf[c] == 0x00 && 
                 buf[c+1] == 0x00 &&
                 buf[c+2] == 0x01 && 
                 buf[c+3] == 0x00) {
                  c += 4;
                  tempref = (buf[c+1]>>6) & 0x03;
                  tempref |= buf[c] << 2;
                  
                  type = ((buf[c+1]&0x38) >>3);
                  if ( rem->video_info.framerate){
                        pts = ((uint64_t)rem->vframe + tempref + 1 
                              - rem->groupframe ) * 90000ULL
                                  /rem->video_info.framerate 
                              + rem->vpts_off;
                        dts = (uint64_t)rem->vframe * 90000ULL/
                              rem->video_info.framerate 
                              + rem->vpts_off;
                  

fprintf(stderr,"MYPTS:");
printpts((uint32_t)pts-rem->vpts_off);
 fprintf(stderr,"   REALPTS:");
 printpts(rem->vpts_list[rem->vptsn-1].PTS-rem->vpts_off);
 fprintf(stderr,"   DIFF:");
 printpts(pts-(uint64_t)rem->vpts_list[rem->vptsn-1].PTS);
// fprintf(stderr,"   DIST: %4d",-rem->vpts_list[rem->vptsn-1].pos+(rem->vwrite+c-4));
 //fprintf(stderr,"   ERR: %3f",(double)(-rem->vpts_list[rem->vptsn-1].PTS+pts)/(rem->vframe+1));
 fprintf(stderr,"\r");

                        
                        
                        rem->vptsn = add_pts(rem->vpts_list,(uint32_t)pts
                                         ,rem->vwrite+c-4,
                                         rem->awrite,
                                         rem->vptsn,
                                         (uint32_t)dts);

                        
                        
                  }
                  rem->vframe++;
                  rem->groupframe++;
                  add_vframe( rem, rem->vframe, rem->vwrite+c, type, 
                            time, pts, dts);
            } else c++;
      }
}

void find_aframes( Remux *rem, uint8_t *buf, int l)
{
      int c = 0;
      uint64_t pts = 0;
      int sam;
      uint32_t fr;


      while ( c < l - 2){
            if ( buf[c] == 0xFF && 
                 (buf[c+1] & 0xF8) == 0xF8) {
                  c += 2;
                  if ( rem->audio_info.layer >= 0){
                        sam = samples[3-rem->audio_info.layer];
                        fr = freq[rem->audio_info.frequency] ;
            
                    pts = ( (uint64_t)rem->aframe * sam * 900ULL)/fr
                          + rem->apts_off;
                        

fprintf(stderr,"MYPTS:");
printpts((uint32_t)pts-rem->apts_off);
 fprintf(stderr," REALPTS:");
 printpts(rem->apts_list[rem->aptsn-1].PTS-rem->apts_off);
 fprintf(stderr," DIFF:");
 printpts((uint32_t)((uint64_t)rem->apts_list[rem->aptsn-1].PTS-pts));
// fprintf(stderr," DIST: %4d",-rem->apts_list[rem->aptsn-1].pos+(rem->awrite+c-2));
 fprintf(stderr,"\r");

                    rem->aptsn = add_pts(rem->apts_list,(uint32_t)pts
                                   ,rem->awrite+c-2,
                                   rem->vwrite,
                                   rem->aptsn,
                                   (uint32_t)pts);
            }

                  rem->aframe++;
                  add_aframe( rem, rem->aframe, rem->awrite+c, pts);
                  
            } else c++;
      }
}

int refill_buffy(Remux *rem)
{
      pes_packet pes;
      int count = 0;
      int acount, vcount;
      ringbuffy *vbuf = &rem->vid_buffy;
      ringbuffy *abuf = &rem->aud_buffy;
      int fin = rem->fin;

      acount = abuf->size-ring_rest(abuf);
      vcount = vbuf->size-ring_rest(vbuf);
      
      
      while ( acount > MAX_PLENGTH && vcount > MAX_PLENGTH && count < 10){
            int neof;
            count++;
            init_pes(&pes);
            if ((neof = read_pes(fin,&pes)) <= 0) return -1;
            switch(pes.stream_id){
            case AUDIO_STREAM_S ... AUDIO_STREAM_E:
                  rem->apes++;
                  if( rem->audio_info.layer < 0 &&
                      (pes.flags2 & PTS_DTS) )
                        add_apts(rem, pes.pts);
                  find_aframes( rem, pes.pes_pckt_data, pes.length);
                  ring_write(abuf,(char *)pes.pes_pckt_data,pes.length);
                  rem->awrite += pes.length;
                  break;
            case VIDEO_STREAM_S ... VIDEO_STREAM_E:
                  rem->vpes++;
                  if( !rem->video_info.framerate &&
                      (pes.flags2 & PTS_DTS) )
                        add_vpts(rem, pes.pts);

                  find_vframes( rem, pes.pes_pckt_data, pes.length);

                  ring_write(vbuf,(char *)pes.pes_pckt_data,pes.length);
                  rem->vwrite += pes.length;
                  break;
            }
            acount = abuf->size-ring_rest(abuf);
            vcount = vbuf->size-ring_rest(vbuf);
            kill_pes(&pes);
      }
      if (count < 10)   return 0;
      return 1;
}

int vring_read( Remux *rem, uint8_t *buf, int l)
{
      int c = 0;
      int r = 0;

      if (ring_rest(&rem->vid_buffy) <= l)
            r = refill_buffy(rem);
      if (r) return -1;

      c = ring_read(&rem->vid_buffy, (char *) buf, l);
      rem->vread += c;
      del_vpts(rem);
      del_vframe(rem);
      return c;
}

int aring_read( Remux *rem, uint8_t *buf, int l)
{
      int c = 0;
      int r = 0;

      if (ring_rest(&rem->aud_buffy) <= l)
            r = refill_buffy(rem);
      if (r) return -1;
      
      c = ring_read(&rem->aud_buffy, (char *)buf, l);
      rem->aread += c;
      del_apts(rem);
      del_aframe(rem);
      return c;
}

int vring_peek( Remux *rem, uint8_t *buf, int l, long off)
{
      int c = 0;
      
      if (ring_rest(&rem->vid_buffy) <= l)
            refill_buffy(rem);

      c = ring_peek(&rem->vid_buffy, (char *) buf, l, off);
      return c;
}

int aring_peek( Remux *rem, uint8_t *buf, int l, long off)
{
      int c = 0;

      if (ring_rest(&rem->aud_buffy) <= l)
            refill_buffy(rem);

      c = ring_peek(&rem->aud_buffy, (char *)buf, l, off);
      return c;
}


int get_video_info(Remux *rem)
{
      uint8_t buf[12];
      uint8_t *headr;
      int found = 0;
        int sw;
      long off = 0;
      int form = -1;
      ringbuffy *vid_buffy = &rem->vid_buffy;
      VideoInfo *vi = &rem->video_info;

      while (found < 4 && ring_rest(vid_buffy)){
            uint8_t b[4];

            vring_peek( rem, b, 4, 0);
            if ( b[0] == 0x00 && b[1] == 0x00 && b[2] == 0x01
                 && b[3] == 0xb3) found = 4;
            else {
                  off++;
                  vring_read( rem, b, 1);
            }
      }
      rem->vframe = rem->vframen-1;

      if (! found) return -1;
      buf[0] = 0x00; buf[1] = 0x00; buf[2] = 0x01; buf[3] = 0xb3;
      headr = buf+4;
      if(vring_peek(rem, buf, 12, 0) < 12) return -1;

      vi->horizontal_size     = ((headr[1] &0xF0) >> 4) | (headr[0] << 4);
      vi->vertical_size = ((headr[1] &0x0F) << 8) | (headr[2]);
    
        sw = (int)((headr[3]&0xF0) >> 4) ;

        switch( sw ){
      case 1:
            fprintf(stderr,"Videostream: ASPECT: 1:1");
            vi->aspect_ratio = 100;        
            break;
      case 2:
            fprintf(stderr,"Videostream: ASPECT: 4:3");
                vi->aspect_ratio = 133;        
            break;
      case 3:
            fprintf(stderr,"Videostream: ASPECT: 16:9");
                vi->aspect_ratio = 177;        
            break;
      case 4:
            fprintf(stderr,"Videostream: ASPECT: 2.21:1");
                vi->aspect_ratio = 221;        
            break;

        case 5 ... 15:
            fprintf(stderr,"Videostream: ASPECT: reserved");
                vi->aspect_ratio = 0;        
            break;

        default:
                vi->aspect_ratio = 0;        
                return -1;
      }

        fprintf(stderr,"  Size = %dx%d",vi->horizontal_size,vi->vertical_size);

        sw = (int)(headr[3]&0x0F);

        switch ( sw ) {
      case 1:
            fprintf(stderr,"  FRate: 23.976 fps");
                vi->framerate = 24000/1001.;
            form = -1;
            break;
      case 2:
            fprintf(stderr,"  FRate: 24 fps");
                vi->framerate = 24;
            form = -1;
            break;
      case 3:
            fprintf(stderr,"  FRate: 25 fps");
                vi->framerate = 25;
            form = VIDEO_MODE_PAL;
            break;
      case 4:
            fprintf(stderr,"  FRate: 29.97 fps");
                vi->framerate = 30000/1001.;
            form = VIDEO_MODE_NTSC;
            break;
      case 5:
            fprintf(stderr,"  FRate: 30 fps");
                vi->framerate = 30;
            form = VIDEO_MODE_NTSC;
            break;
      case 6:
            fprintf(stderr,"  FRate: 50 fps");
                vi->framerate = 50;
            form = VIDEO_MODE_PAL;
            break;
      case 7:
            fprintf(stderr,"  FRate: 60 fps");
                vi->framerate = 60;
            form = VIDEO_MODE_NTSC;
            break;
      }

      rem->dts_delay = (int)(7.0/vi->framerate/2.0*90000);

      vi->bit_rate = 400*(((headr[4] << 10) & 0x0003FC00UL) 
                      | ((headr[5] << 2) & 0x000003FCUL) | 
                      (((headr[6] & 0xC0) >> 6) & 0x00000003UL));
      
        fprintf(stderr,"  BRate: %.2f Mbit/s",(vi->bit_rate)/1000000.);
      
        fprintf(stderr,"\n");
        vi->video_format = form;

      /*
      marker_bit (&video_bs, 1);
      vi->vbv_buffer_size     = getbits (&video_bs, 10);
      vi->CSPF          = get1bit (&video_bs);
      */
      return form;
}


int get_audio_info( Remux *rem)
{
      uint8_t *headr;
      uint8_t buf[3];
      long off = 0;
      int found = 0;
      ringbuffy *aud_buffy = &rem->aud_buffy;
      AudioInfo *ai = &rem->audio_info;
      
      while(!ring_rest(aud_buffy) && !refill_buffy(rem));
      while (found < 2 && ring_rest(aud_buffy)){
            uint8_t b[2];
            refill_buffy(rem);
            aring_peek( rem, b, 2, 0);

            if ( b[0] == 0xff && (b[1] & 0xf8) == 0xf8)
                  found = 2;
            else {
                  off++;
                  aring_read( rem, b, 1);
            }
      }     

      if (!found) return -1;
      rem->aframe = rem->aframen-1;
      
      if (aring_peek(rem, buf, 3, 0) < 1) return -1;
      headr = buf+2;

      ai->layer = (buf[1] & 0x06) >> 1;

        fprintf(stderr,"Audiostream: Layer: %d", 4-ai->layer);


      ai->bit_rate = bitrates[(3-ai->layer)][(headr[0] >> 4 )]*1000;

      if (ai->bit_rate == 0)
            fprintf (stderr,"  Bit rate: free");
      else if (ai->bit_rate == 0xf)
            fprintf (stderr,"  BRate: reserved");
      else
            fprintf (stderr,"  BRate: %d kb/s", ai->bit_rate/1000);
      

      ai->frequency = (headr[0] & 0x0c ) >> 2;
      if (ai->frequency == 3)
            fprintf (stderr, "  Freq: reserved\n");
      else
            fprintf (stderr,"  Freq: %2.1f kHz\n", 
                   freq[ai->frequency]/10.);

      return 0;
}



void init_remux(Remux *rem, int fin, int fout, int mult)
{
      rem->video_info.framerate = 0;
      rem->audio_info.layer = -1;
      rem->fin = fin;
      rem->fout = fout;
      ring_init(&rem->vid_buffy, 40*BUFFYSIZE*mult);
      ring_init(&rem->aud_buffy, BUFFYSIZE*mult);
      init_ptsl(rem->vpts_list);
      init_ptsl(rem->apts_list);
      init_framel(rem->vframe_list);
      init_framel(rem->aframe_list);

      rem->vptsn     = 0;
      rem->aptsn     = 0;
      rem->vframen   = 0;
      rem->aframen   = 0;
      rem->vframe    = 0;
      rem->aframe    = 0;
      rem->vcframe   = 0;
      rem->acframe   = 0;
      rem->vpts      = 0;
      rem->vdts      = 0;
      rem->apts_off  = 0;
      rem->vpts_off  = 0;
      rem->apts_delay= 0;
      rem->vpts_delay= 0;
      rem->dts_delay = 0;
      rem->apts      = 0;
      rem->vpes      = 0;
      rem->apes      = 0;
      rem->vpts_old  = 0;
      rem->apts_old  = 0;
      rem->SCR       = 0;
      rem->vwrite    = 0;
      rem->awrite    = 0;
      rem->vread     = 0;
      rem->aread     = 0;
      rem->group     = 0;
      rem->groupframe= 0;
      rem->pack_size = 0;
      rem->muxr      = 0;
      rem->time_off  = 0;
}

uint32_t bytes2pts(int bytes, int rate)
{
      if (bytes < 0xFFFFFFFFUL/720000UL)
            return (uint32_t)(bytes*720000UL/rate);
      else
            return (uint32_t)(bytes/rate*720000UL);
}

long pts2bytes( uint32_t pts, int rate)
{
      if (pts < 0xEFFFFFFFUL/rate)
            return (pts*rate/720000);
      else 
            return (pts* (rate/720000));
}

int write_audio_pes( Remux *rem, uint8_t *buf, int *alength)
{
      int add;
      int pos = 0;
      int p   = 0;
      uint32_t pts = 0;
      int stuff = 0;
      int length = *alength;

      if (!length) return 0;
      p = PS_HEADER_L1+PES_H_MIN;

      if (rem->apts_old != rem->apts){
            pts = (uint32_t)((uint64_t)rem->apts + rem->apts_delay - rem->apts_off);
            p += 5;
      }
      if ( length+p >= rem->pack_size){
            length = rem->pack_size;
      } else {
            if (rem->pack_size-length-p <= PES_MIN){
                  stuff = rem->pack_size - length;
                  length = rem->pack_size;
            } else 
                  length = length+p;
      }
      pos = write_ps_header(buf,rem->SCR,rem->muxr, 1, 0, 0, 1, 1, 1, 
                        0, 0, 0, 0, 0, 0);

      pos += write_pes_header( 0xC0, length-pos, pts, buf+pos, stuff);
      add = aring_read( rem, buf+pos, length-pos);
      *alength = add;
      if (add < 0) return -1;
      pos += add;
      rem->apts_old = rem->apts;
      rem->apts = rem->apts_list[0].PTS;

      if (pos+PES_MIN < rem->pack_size){
            pos += write_pes_header( PADDING_STREAM, rem->pack_size-pos, 0,
                               buf+pos, 0);
            pos = rem->pack_size;
      }           
      if (pos != rem->pack_size) {
            fprintf(stderr,"apos: %d\n",pos);
            exit(1);
      }

      return pos;
}

int write_video_pes( Remux *rem, uint8_t *buf, int *vlength)
{
      int add;
      int pos = 0;
      int p   = 0;
      uint32_t pts = 0;
      uint32_t dts = 0;
      int stuff = 0;
      int length = *vlength;
      long diff = 0;

      if (! length) return 0;
      p = PS_HEADER_L1+PES_H_MIN;

      if (rem->vpts_old != rem->vpts){
            pts = (uint32_t)((uint64_t)rem->vpts + rem->vpts_delay - rem->vpts_off);
            p += 5;
      }
      if ( length+p >= rem->pack_size){
            length = rem->pack_size;
      } else {
            if (rem->pack_size - length - p <= PES_MIN){
                  stuff = rem->pack_size - length;
                  length = rem->pack_size;
            } else 
                  length = length+p;
      }

      pos = write_ps_header(buf,rem->SCR,rem->muxr, 1, 0, 0, 1, 1, 1, 
                        0, 0, 0, 0, 0, 0);

      pos += write_pes_header( 0xE0, length-pos, pts, buf+pos, stuff);
      add = vring_read( rem, buf+pos, length-pos);
      *vlength = add;
      if (add < 0) return -1;
      pos += add;
      rem->vpts_old = rem->vpts;
      dts = rem->vdts;
      rem->vpts = rem->vpts_list[0].PTS;
      rem->vdts = rem->vpts_list[0].dts;
      if ( diff > 0) rem->SCR += diff;
      if (pos+PES_MIN < rem->pack_size){
            //  fprintf(stderr,"vstuffing: %d   \n",rem->pack_size-pos);
            pos += write_pes_header( PADDING_STREAM, rem->pack_size-pos, 0,
                               buf+pos, 0);
            pos = rem->pack_size;
      }           
      return pos;
}

void print_info( Remux *rem , int ret)
{
      int newtime = 0;
      static int time = 0;
      int i = 0;

      while(! newtime && i < rem->vframen) {
            if( (newtime = rem->vframe_list[i].time)) break;
            i++;
      }
      if (newtime) time = newtime;
      
      fprintf(stderr,"SCR:");
      printpts(rem->SCR);
      fprintf(stderr," VDTS:");
      printpts((uint32_t)((uint64_t)rem->vdts - rem->vpts_off + rem->vpts_delay));
      fprintf(stderr," APTS:");
      printpts((uint32_t)((uint64_t)rem->apts - rem->apts_off + rem->apts_delay));
      fprintf(stderr," TIME:%2d:", time/3600);
      fprintf(stderr,"%02d:", (time%3600)/60);
      fprintf(stderr,"%02d", (time%3600)%60);
      if (ret) fprintf(stderr,"\n");
      else fprintf(stderr,"\r");
}

void remux(int fin, int fout, int pack_size, int mult)
{
      Remux rem;
      long ptsdiff;
      uint8_t buf[MAX_PACK_L];
      long pos = 0;
      int r = 0;
      int i, r1, r2;
      long packets = 0;
      uint8_t mpeg_end[4] = { 0x00, 0x00, 0x01, 0xB9 };
      uint32_t SCR_inc = 0;
      int data_size;
      long vbuf, abuf;
      long vbuf_max, abuf_max;
      PTS_List abufl[MAX_PTS];
      PTS_List vbufl[MAX_PTS];
      int abufn = 0;
      int vbufn = 0;
      uint64_t pts_d = 0;
      int ok_audio; 
      int ok_video; 
      uint32_t apos = 0;
      uint32_t vpos = 0;
      int vpack_size = 0;
      int apack_size = 0;

      init_ptsl(abufl);
      init_ptsl(vbufl);

      if (mult < 0 || mult >1000){
            fprintf(stderr,"Multipler too large\n");
            exit(1);
      }
      init_remux(&rem, fin, fout, mult);
      rem.pack_size = pack_size;
      data_size = pack_size - MAX_H_SIZE;
      fprintf(stderr,"pack_size: %d header_size: %d data size: %d\n",
            pack_size, MAX_H_SIZE, data_size);
      refill_buffy(&rem);
      fprintf(stderr,"Package size: %d\n",pack_size);
      
      if ( get_video_info(&rem) < 0 ){
            fprintf(stderr,"ERROR: Can't find valid video stream\n");
            exit(1);
      }

      i = 0;
      while(! rem.time_off && i < rem.vframen) {
            if( (rem.time_off = rem.vframe_list[i].time)) break;
            i++;
      }

      if ( get_audio_info(&rem) < 0 ){
            fprintf(stderr,"ERROR: Can't find valid audio stream\n");
            exit(1);
      }
      
      rem.vpts = rem.vpts_list[0].PTS;
      rem.vdts = rem.vpts;
      rem.vpts_off = rem.vpts;
      fprintf(stderr,"Video start PTS = %fs \n",rem.vpts_off/90000.);
      rem.apts = rem.apts_list[0].PTS;
      rem.apts_off = rem.apts;
      ptsdiff = rem.vpts - rem.apts;
      if (ptsdiff > 0) rem.vpts_off -= ptsdiff;
      else rem.apts_off -= -ptsdiff;
      fprintf(stderr,"Audio start PTS = %fs\n",rem.apts_off/90000.);
      fprintf(stderr,"Difference Video - Audio = %fs\n",ptsdiff/90000.);
      fprintf(stderr,"Time offset = %ds\n",rem.time_off);

      rem.muxr = (rem.video_info.bit_rate + 
                rem.audio_info.bit_rate)/400;
      fprintf(stderr,"MUXRATE: %.2f Mb/sec\n",rem.muxr/2500.);
      SCR_inc = 1800 * pack_size / rem.muxr;
      
      r = 0;
      while ( rem.vptsn < 2 && !r) r = refill_buffy(&rem);
      r = 0;
      while ( rem.aptsn < 2 && !r) r = refill_buffy(&rem);

      //rem.vpts_delay =  (uint32_t)(2*90000ULL* (uint64_t)pack_size/rem.muxr);
      rem.vpts_delay = rem.dts_delay;
      rem.apts_delay = rem.vpts_delay;

      vbuf_max = 29440;
      abuf_max = 4096;
      vbuf = 0;
      abuf = 0;
      pos = write_ps_header(buf,rem.SCR,rem.muxr, 1, 0, 0, 1, 1, 1, 
                        0xC0, 0, 32, 0xE0, 1, 230);
      pos += write_pes_header( PADDING_STREAM, pack_size-pos, 0, buf+pos,0);
      pos = rem.pack_size;
      write( fout, buf, pos);

      apos = rem.aread;
      vpos = rem.vread;
      print_info( &rem, 1 );

      while( ring_rest(&rem.aud_buffy) && ring_rest(&rem.vid_buffy) ){
            uint32_t next_apts;
            uint32_t next_vdts;
            int asize, vsize;

            r1 = 0;
            r2 = 0;
            while ( rem.aframen < 2 && !r1) 
                  r1 = refill_buffy(&rem);
            while ( rem.vframen < 2 && !r2) 
                  r2 = refill_buffy(&rem);
            if (r1 && r2) break;

            if ( !r1 && apos <= rem.aread)
                  apos = rem.aframe_list[1].pos;
            if ( !r2 && vpos <= rem.vread)
                  vpos = rem.vframe_list[1].pos;
            apack_size = apos - rem.aread; 
            vpack_size = vpos - rem.vread; 
            

            next_vdts = (uint32_t)((uint64_t)rem.vdts + rem.vpts_delay 
                          - rem.vpts_off) ;
            ok_video = ( rem.SCR < next_vdts);

            next_apts = (uint32_t)((uint64_t)rem.apts + rem.apts_delay 
                          - rem.apts_off) ;
            ok_audio = ( rem.SCR  < next_apts);

            asize = (apack_size > data_size ? data_size: apack_size);
            vsize = (vpack_size > data_size ? data_size: vpack_size);

            fprintf(stderr,"vframen: %d  aframen: %d  v_ok: %d  a_ok: %d  v_buf: %d  a_buf: %d vpacks: %d  apacks: %d\n",rem.vframen,rem.aframen, ok_video, ok_audio, (int)vbuf,(int)abuf,vsize, asize);
            

            if( vbuf+vsize  < vbuf_max && vsize && ok_audio ){
                  fprintf(stderr,"1 ");
                  pos = write_video_pes( &rem, buf, &vpack_size);
                  write( fout, buf, pos);
                  vbuf += vpack_size;
                  vbufn = add_pts( vbufl, rem.vdts, vpack_size, 
                               0, vbufn, 0);
                  packets++;
            } else if ( abuf+asize < abuf_max && asize &&
                      ok_video  ){
                  fprintf(stderr,"2 ");
                  pos = write_audio_pes( &rem, buf, &apack_size);
                  write( fout, buf, pos);
                  abuf += apack_size;
                  abufn = add_pts( abufl, rem.apts, apack_size, 
                               0, abufn, 0);
                  packets++;
            } else if ( abuf+asize < abuf_max && asize &&
                      !ok_audio){
                  fprintf(stderr,"3 ");
                  pos = write_audio_pes( &rem, buf, &apack_size);
                  write( fout, buf, pos);
                  abuf += apack_size;
                  abufn = add_pts( abufl, rem.apts, apack_size, 
                               0, abufn, 0);
                  packets++;
            } else if (vbuf+vsize  < vbuf_max && vsize &&
                     !ok_video){
                  fprintf(stderr,"4 ");
                  pos = write_video_pes( &rem, buf, &vpack_size);
                  write( fout, buf, pos);
                  vbuf += vpack_size;
                  vbufn = add_pts( vbufl, rem.vdts, vpack_size, 
                               0, vbufn, 0);
                  packets++;
            } else {
            fprintf(stderr,"5 ");
                  pos = write_ps_header(buf,rem.SCR,rem.muxr, 1, 0, 0, 
                                    1, 1, 1, 0, 0, 0, 0, 0, 0);

                  pos += write_pes_header( PADDING_STREAM, pack_size-pos,
                                     0, buf+pos, 0);
                  write( fout, buf, pos);
            }


            //fprintf(stderr,"vbufn: %d  abufn: %d  ", vbufn,abufn);
            //fprintf(stderr,"vbuf: %5d  abuf: %4d\n", vbuf,abuf);

            if (rem.SCR > rem.vdts+rem.vpts_off -rem.vpts_delay) 
                  rem.SCR = rem.vdts-rem.vpts_off;
            rem.SCR = (uint32_t)((uint64_t) rem.SCR + SCR_inc);

            if ( rem.apts_off + rem.SCR < rem.apts_delay ) pts_d = 0;
            else pts_d = (uint64_t) rem.SCR + rem.apts_off - rem.apts_delay;
            abuf -= del_ptss( abufl, (uint32_t) pts_d, &abufn);

            if ( rem.vpts_off + rem.SCR < rem.vpts_delay ) pts_d = 0;
            else pts_d = (uint64_t) rem.SCR + rem.vpts_off - rem.vpts_delay;
            vbuf -= del_ptss( vbufl, (uint32_t) pts_d, &vbufn);

            print_info( &rem, 1);
            //fprintf(stderr,"vbufn: %d  abufn: %d  ", vbufn,abufn);
            //fprintf(stderr,"vbuf: %5d  abuf: %4d\n\n", vbuf,abuf);


      }
      pos = write_ps_header(buf,rem.SCR,rem.muxr, 1, 0, 0, 1, 1, 1, 
                        0, 0, 0, 0, 0, 0);

      pos += write_pes_header( PADDING_STREAM, pack_size-pos-4, 0, 
                         buf+pos, 0);
      pos = rem.pack_size-4;
      write( fout, buf, pos);

      write( fout, mpeg_end, 4);
      fprintf(stderr,"\ndone\n");
}


typedef 
struct pes_buffer_s{
      ringbuffy   pes_buffy;
      uint8_t     type;
      PTS_List    pts_list[MAX_PTS];
      FRAME_List  frame_list[MAX_FRAME];
      int         pes_size;
      uint64_t    written;
      uint64_t    read;
} PESBuffer;


void init_PESBuffer(PESBuffer *pbuf, int pes_size, int buf_size, uint8_t type)
{
      init_framel( pbuf->frame_list);
      init_ptsl( pbuf->pts_list);
      ring_init( &pbuf->pes_buffy, buf_size);
      pbuf->pes_size = pes_size;
      pbuf->type = type; 
      pbuf->written = 0;
      pbuf->read = 0;
}
      

#define MAX_PBUF 4

typedef
struct remux_s{
      PESBuffer pbuf_list[MAX_PBUF];
      int num_pbuf;
} REMUX;


void init_REMUX(REMUX *rem)
{
      rem->num_pbuf = 0;
}



#define REPACK      2048 
#define ABUF_SIZE   REPACK*1024
#define VBUF_SIZE   REPACK*10240

void remux_main(uint8_t *buf, int count, void *pr)
{
      int i, b;
      int bufsize = 0;
      p2p *p = (p2p *) pr;
      PESBuffer *pbuf;
      REMUX *rem = (REMUX *) p->data;
      uint8_t type = buf[3];
      int *npbuf = &(rem->num_pbuf);

      switch ( type ){
      case PRIVATE_STREAM1:
            bufsize = ABUF_SIZE;
      case VIDEO_STREAM_S ... VIDEO_STREAM_E:
            if (!bufsize) bufsize = VBUF_SIZE;
      case AUDIO_STREAM_S ... AUDIO_STREAM_E:
            if (!bufsize) bufsize = ABUF_SIZE;
            b = -1;
            for ( i = 0; i < *npbuf; i++){
                  if ( type == rem->pbuf_list[i].type ){
                        b = i;
                        break;
                  }
            }
            if (b < 0){
                  if ( *npbuf < MAX_PBUF ){
                        init_PESBuffer(&rem->pbuf_list[*npbuf], 
                                     p->repack+6, bufsize, type);
                        b = *npbuf;
                        (*npbuf)++;
                  } else {
                        fprintf(stderr,"Not enough PES buffers\n");
                        exit(1);
                  }
            }
            break;
      default:
            return;
      }
      
      pbuf = &(rem->pbuf_list[b]);
      if (ring_write(&(pbuf->pes_buffy),(char *)buf,count) != count){
            fprintf(stderr,"buffer overflow type 0x%2x\n",type);
            exit(1);
      } else {
            pbuf->written += count;
            if ((p->flag2 & PTS_DTS_FLAGS)){
                  uint32_t PTS = trans_pts_dts(p->pts);
                  add_pts(pbuf->pts_list, PTS, pbuf->written, 
                        pbuf->written, 0, 0);
            }
            p->flag2 = 0;
      }

}

void output_mux(p2p *p) 
{
      int i, filling;
      PESBuffer *pbuf;
      ringbuffy   *pes_buffy; 
      REMUX *rem = (REMUX *) p->data;
      int repack = p->repack;
      int npbuf = rem->num_pbuf;

      for ( i = 0; i < npbuf; i++){
            pbuf = &(rem->pbuf_list[i]);
            pes_buffy = &pbuf->pes_buffy;
            filling = pes_buffy->size - ring_rest(pes_buffy);
            if (filling/(2 *repack)){
                  pbuf->read += ring_read_file(pes_buffy, p->fd1, 
                                         (filling/repack)*repack);
            }
      }
}



#define SIZE 32768

void remux2(int fdin, int fdout)
{
      p2p p;
      int count = 1;
      uint8_t buf[SIZE];
      uint64_t length = 0;
      uint64_t l = 0;
      int verb = 0;
      REMUX rem;
      
      init_p2p(&p, remux_main, REPACK);
      p.fd1 = fdout;
      p.data = (void *) &rem;
      

      if (fdin != STDIN_FILENO) verb = 1; 

      if (verb) {
            length = lseek(fdin, 0, SEEK_END);
            lseek(fdin,0,SEEK_SET);
      }

      while (count > 0){
            count = read(fdin,buf,SIZE);
            l += count;
            if (verb)
                  fprintf(stderr,"Writing  %2.2f %%\r",
                        100.*l/length);

            get_pes(buf,count,&p,pes_repack);
            output_mux(&p);
      }
            
}

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