jack_capture.c

/*
  Kjetil Matheussen, 2005-2013.

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "das_config.h"

#define _GNU_SOURCE 1 // For asprintf

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
#include <sndfile.h>
#include <pthread.h>
#include <math.h>
#include <stdarg.h>

#include <termios.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <sys/time.h>
#include <sys/resource.h>

#include <jack/jack.h>

#include <libgen.h>
#include <sys/wait.h>

#if HAVE_LAME
#include <lame/lame.h>
#endif
#if HAVE_LIBLO
#include <lo/lo.h>
/* defined in osc.c */
int  init_osc(int osc_port);
void shutdown_osc(void);
#endif

#include "jack_capture.h"

#include "sema.h"

#include "atomic.h"

#include "vringbuffer.h"


#define JC_MAX(a,b) (((a)>(b))?(a):(b))
#define JC_MIN(a,b) (((a)<(b))?(a):(b))


#define ALIGN_UP(value,alignment) (((uintptr_t)value + alignment - 1) & -alignment)
#define ALIGN_UP_DOUBLE(p) ALIGN_UP(p,sizeof(double)) // Using double because double should always be very large.


#define OPTARGS_CHECK_GET(wrong,right) lokke==argc-1?(fprintf(stderr,"Must supply argument for '%s'\n",argv[lokke]),exit(-4),wrong):right

#define OPTARGS_BEGIN(das_usage) {int lokke;const char *usage=das_usage;for(lokke=0;lokke<argc;lokke++){char *a=argv[lokke];if(!strcmp("--help",a)||!strcmp("-h",a)){fprintf(stderr,"%s",usage);exit(0);
#define OPTARG(name,name2) }}else if(!strcmp(name,a)||!strcmp(name2,a)){{
#define OPTARG_GETINT() OPTARGS_CHECK_GET(0,atoll(argv[++lokke]))
//int optargs_inttemp;
//#define OPTARG_GETINT() OPTARGS_CHECK_GET(0,(optargs_inttemp=strtol(argv[++lokke],(char**)NULL,10),errno!=0?(perror("strtol"),0):optargs_inttemp))
#define OPTARG_GETFLOAT() OPTARGS_CHECK_GET(0.0f,atof(argv[++lokke]))
#define OPTARG_GETSTRING() OPTARGS_CHECK_GET("",argv[++lokke])
#define OPTARG_GETBOOL() ({const char *response = OPTARG_GETSTRING(); !strcasecmp(response,"false") ? false : !strcasecmp(response,"true") ? true : (fprintf(stderr,"Argument for '%s' must be \"false\" or \"true\"\n",argv[lokke-1]), exit(-5) , false);})
#define OPTARG_LAST() }}else if(lokke==argc-1 && argv[lokke][0]!='-'){lokke--;{
#define OPTARGS_ELSE() }else if(1){
#define OPTARGS_END }else{fprintf(stderr,"%s",usage);exit(-1);}}}



/* Arguments and their default values */
#define DEFAULT_MIN_BUFFER_TIME 4
#define DEFAULT_MIN_MP3_BUFFER_TIME 8
static float min_buffer_time=-1.0f;
static float max_buffer_time=40.0f;
static jack_client_t *client=NULL;
#define DEFAULT_NUM_CHANNELS 2
#define DEFAULT_NUM_CHANNELS_SDS 1
static int num_channels=-1;
static int bitdepth=0;
static char *base_filename=NULL;
static char *filename=NULL;
static bool use_vu=true;
static bool use_meterbridge=false;
static bool show_bufferusage=true;
static char *meterbridge_type="vu";
static char *meterbridge_reference="0";
//static const int vu_len=56;
#define vu_len 65
static int vu_dB=true;
static float vu_bias=1.0f;
static int leading_zeros=1;
static char *filename_prefix="jack_capture_";
static DEFINE_ATOMIC(int64_t, num_frames_recorded)=0;
static int64_t num_frames_to_record=0;
static bool fixed_duration=false;
static bool no_stdin=false;
static double recording_time=0.0;
static const int disk_error_stop=0;
static int disk_errors=0;
static bool soundfile_format_is_set=false;
static char *soundfile_format="wav";
static char *soundfile_format_one_or_two="wav";
#define ONE_OR_TWO_CHANNELS_FORMAT SF_FORMAT_WAV
static char *soundfile_format_multi="wavex";
#define MORE_THAN_TWO_CHANNELS_FORMAT SF_FORMAT_WAVEX
bool silent=false;
bool verbose=false;
static bool absolutely_silent=false;
static bool create_tme_file=false;
static bool write_to_stdout=false;
static bool write_to_mp3 = false;
static int das_lame_quality = 2; // 0 best, 9 worst.
static int das_lame_bitrate = -1;
static int das_lame_samplerate = 0;
static float ogg_vbr_quality = -1.0;
static bool use_jack_transport = false;
static bool use_jack_freewheel = false;
static bool use_manual_connections = false;
#if HAVE_LIBLO
static int osc_port = -1;
#endif
static char *hook_cmd_opened = NULL;
static char *hook_cmd_closed = NULL;
static char *hook_cmd_rotate = NULL;
static char *hook_cmd_timing = NULL;
static int64_t rotateframe=0;

static bool timemachine_mode = false;
static bool timemachine_recording = false;
static float timemachine_prebuffer = 8.0f;
static int64_t num_frames_written_to_disk = 0;
static bool program_ended_with_return = false;

/* JACK data */
static DEFINE_ATOMIC(jack_port_t**, g_ports) = NULL;
static jack_port_t **ports_meterbridge=NULL;
typedef jack_default_audio_sample_t sample_t;
static float jack_samplerate;
static bool jack_has_been_shut_down=false;

static int64_t unreported_overruns=0;
static int total_overruns=0;
static int total_xruns=0;

static volatile int freewheel_mode=0;
static char *jackname="jack_capture"; // limited to 33 characters


/* Disk thread */
#if HAVE_LAME
static lame_global_flags *lame;
#endif

static bool disk_thread_has_high_priority=false;


/* Helper thread */
static pthread_t helper_thread={0};
static float *vu_vals=NULL;
static int   *vu_times=NULL;
static int *vu_peaks=NULL;
static float *vu_peakvals=NULL;

/* Synchronization between jack process thread and disk thread. */
static DEFINE_ATOMIC(bool, is_initialized) = false; // This $@#$@#$ variable is needed because jack ports must be initialized _after_ (???) the client is activated. (stupid jack)
static DEFINE_ATOMIC(bool, is_running) = true; // Mostly used to stop recording as early as possible.


/* Buffer */
static int block_size; // Set once only. Never changes value after that, even if jack buffer size changes.

static bool buffer_interleaved = true;


typedef struct buffer_t{
  int overruns;
  int pos;
  sample_t data[];
} buffer_t;

//static pid_t mainpid;

static buffer_t *current_buffer;

/* Jack connecting thread. */
static pthread_t connect_thread={0} ;


// das stop semaphore
static SEM_TYPE_T stop_sem;




/////////////////////////////////////////////////////////////////////
//////////////////////// VARIOUS ////////////////////////////////////
/////////////////////////////////////////////////////////////////////

#if 0
void get_free_mem(void){
  struct sysinfo sys_info;

  if(sysinfo(&sys_info) != 0)
    perror("sysinfo");

  printf("Total Ram ----- %uk\tFree Ram ------ %uk\n", sys_info.totalram
         ,
         sys_info.freeram / 1024);
}
#endif
char *string_concat(char *s1,char *s2);

static void verbose_print(const char *fmt, ...){
  if (absolutely_silent==true) return;
  if(verbose==true){
    va_list argp;
    va_start(argp,fmt);
    vfprintf(stderr,fmt,argp);
    va_end(argp); } }

static void* my_calloc(size_t size1,size_t size2){
  size_t size = size1*size2;
  void*  ret  = malloc(size);
  if(ret==NULL){
    fprintf(stderr,"\nOut of memory. Try a smaller buffer.\n");
    return NULL; }
  memset(ret,0,size);
  return ret; }

static bool set_high_priority(void){
  static bool shown_warning = false;
  static int  prio          = -20;

  while(prio<0 && setpriority(PRIO_PROCESS,0,prio)==-1)
    prio++;

  if(prio==0 && shown_warning==false){
    print_message("Warning. Could not set higher priority for a SCHED_OTHER process using setpriority().\n");
    shown_warning=true; }

  if(prio < 0)
    return true;
  else
    return false; }


static int echo_turned_on=true;
static struct termios current;
static struct termios initial;

static void turn_off_echo(void){
  tcgetattr( STDIN_FILENO, &initial );
  current = initial;
  current.c_lflag &= ~ECHO; // added
  tcsetattr( STDIN_FILENO, TCSANOW, &current );

  echo_turned_on=false; }

static void turn_on_echo(void){
  if(echo_turned_on==true)
    return;
  tcsetattr( STDIN_FILENO, TCSANOW, &initial );
  echo_turned_on=true; }


/////////////////////////////////////////////////////////////////////
//////////////////////// BUFFERS ////////////////////////////////////
/////////////////////////////////////////////////////////////////////


static vringbuffer_t *vringbuffer;

//static sample_t **buffers=NULL;
static sample_t *empty_buffer;

static int buffer_size_in_bytes;

//  block size in bytes = jack block size (1 channel) * sizeof(float)
// buffer size in bytes = block size in bytes * num_channels


static int64_t seconds_to_frames(float seconds){
  return (int64_t) (((long double)seconds)*((long double)jack_samplerate));
}


static float frames_to_seconds(int frames){
  return ((float)frames)/jack_samplerate;
}

// round up.
static int seconds_to_blocks(float seconds){
  return (int)ceilf((seconds*jack_samplerate/(float)block_size));
}

// same return value as seconds_to_blocks
static int seconds_to_buffers(float seconds){
  return seconds_to_blocks(seconds);
}

#if 0
// not used
static int block_time_in_microseconds(void){
  return (int)(((double)block_size*1000000.0)/(double)jack_samplerate);
}
#endif

static float blocks_to_seconds(int blocks){
  return (float)blocks*(float)block_size/jack_samplerate;
}

// same return value as blocks_to_seconds
static float buffers_to_seconds(int buffers){
  return blocks_to_seconds(buffers);
}


static int autoincrease_callback(vringbuffer_t *vrb, bool first_call, int reading_size, int writing_size){
  (void)vrb;
  (void)reading_size;

  if(use_jack_freewheel)
    return 0;

  if(first_call){
    set_high_priority();
    return 0; }

  if(timemachine_mode==true && timemachine_recording==false)
    return 0;

#if 0
  if(1){
    static jack_transport_state_t prev_state=-1;
    jack_position_t pos;
    jack_transport_state_t state=jack_transport_query(client,&pos);
    if(state!=prev_state){
      print_message("frame: %d\n",pos.frame);
      prev_state=state; } }
#endif

  if(buffers_to_seconds(writing_size) < min_buffer_time)
    return 2; // autoincrease_callback is called approx. at every block. So it should not be necessary to return a value higher than 2. Returning a very low number might also theoretically put a lower constant strain on the memory bus, thus theoretically lower the chance of xruns.

  return 0;
}

static void buffers_init(){
  verbose_print("bufinit1. sizeof(long): %u, sizeof(float): %u, sizeof(double):%u, sizeof(int):%u, sizeof(void*):%u\n",sizeof(long),sizeof(float),sizeof(double),sizeof(int),sizeof(void*));

  vringbuffer = vringbuffer_create(JC_MAX(4,seconds_to_buffers(min_buffer_time)),
                                   JC_MAX(4,seconds_to_buffers(max_buffer_time)),
                                   buffer_size_in_bytes);

  if(vringbuffer==NULL){
    fprintf(stderr,"Unable to allocate memory for buffers\n");
    exit(-1);
  }

  vringbuffer_set_autoincrease_callback(vringbuffer,autoincrease_callback,0);

  current_buffer = vringbuffer_get_writing(vringbuffer);
  empty_buffer   = my_calloc(sizeof(sample_t),block_size*num_channels);
}



/////////////////////////////////////////////////////////////////////
//////////////////////// PORTNAMES //////////////////////////////////
/////////////////////////////////////////////////////////////////////
static const char **cportnames=NULL;
static int num_cportnames=0;

static int findnumports(const char **ports){
  int ret=0;
  while(ports && ports[ret]!=NULL)
    ret++;
  return ret;
}


static void portnames_add_defaults(void){
  if(cportnames==NULL){

    {
      const char **portnames = jack_get_ports(client,NULL,NULL,JackPortIsPhysical|JackPortIsInput);
      int num_ports    = findnumports(portnames);

      if(num_ports==0){
        fprintf(stderr,"No physical output ports found in your jack setup. Exiting.\n");
        exit(0);
      }

      cportnames = my_calloc(sizeof(char*), num_ports+1);
      {
        int i;
        for(i=0;i<num_ports;i++)
          cportnames[i] = portnames[i];
      }

      jack_free(portnames);
    }

    num_cportnames=JC_MAX(DEFAULT_NUM_CHANNELS,findnumports(cportnames));
    if(num_channels==-1) {
      if(!strcasecmp("sds",soundfile_format)){
        num_channels=DEFAULT_NUM_CHANNELS_SDS;
      }else{
        num_channels=DEFAULT_NUM_CHANNELS;
      }
    }

  }else
    if(num_channels==-1)
      num_channels=num_cportnames;

  if(num_channels<=0){
    fprintf(stderr,"No point recording 0 channels. Exiting.\n");
    exit(0);
  }

  // At this point, the variable "num_channels" has a known and valid value.
  vu_vals     = my_calloc(sizeof(float),num_channels);
  vu_times    = my_calloc(sizeof(int),num_channels);
  vu_peaks    = my_calloc(sizeof(int),num_channels);
  vu_peakvals = my_calloc(sizeof(float),num_channels);

  buffer_size_in_bytes = ALIGN_UP_DOUBLE(sizeof(buffer_t) + block_size*num_channels*sizeof(sample_t));
  verbose_print("buf_size_in_bytes: %d\n",buffer_size_in_bytes);
}


static void portnames_add(char *name){
  const char **new_outportnames;
  int add_ch;

  if(name[strlen(name)-1]=='*'){
    char *pattern=strdup(name);
    pattern[strlen(name)-1]=0;

    new_outportnames          = jack_get_ports(client,pattern,"",0);
    //char **new_outportnames = (char**)jack_get_ports(client,"system:capture_1$","",0);
    add_ch                    = findnumports(new_outportnames);
    free(pattern);
  }else{
    new_outportnames          = my_calloc(1,sizeof(char*));
    new_outportnames[0]       = name;
    add_ch                    = 1;
  }

  if(add_ch>0){
    int ch;

    cportnames=realloc(cportnames,(num_cportnames+add_ch)*sizeof(char*));

    for(ch=0;ch<add_ch;ch++){
      cportnames[num_cportnames]=new_outportnames[ch];
      //fprintf(stderr,"ch: %d, num_ch: %d, new_outportnames[ch]: %s, %s\n",ch,num_cportnames,new_outportnames[ch],new_outportnames[ch+1]);
      num_cportnames++;
    }

  }else{
    fprintf(stderr,"\nWarning, no port(s) with name \"%s\".\n",name);
    if(cportnames==NULL)
      if(silent==false)
	fprintf(stderr,"This could lead to using default ports instead.\n");
  }
}

static const char **portnames_get_connections(int ch, bool *using_calloc){
  *using_calloc = true; // silence compiler warning. (fix: logic of program is too complicated)

  if(ch>=num_cportnames)
    return NULL;
  else{
    jack_port_t  *port = jack_port_by_name(client,cportnames[ch]);
    const char  **ret;

    if(port==NULL){
      print_message("Error, port with name \"%s\" not found.\n",cportnames[ch]);
      return NULL;
    }

    if(jack_port_flags(port) & JackPortIsInput){
      ret    = jack_port_get_all_connections(client,port);
      *using_calloc = false;
    }else{
      ret    = my_calloc(2,sizeof(char*));
      ret[0] = cportnames[ch];
      *using_calloc = true;
    }

    return ret;
  }
}





/////////////////////////////////////////////////////////////////////
//////////////////////// console meter //////////////////////////////
/////////////////////////////////////////////////////////////////////

// Note that the name "vu" is used instead of "console meter".
// I know (now) it's not a vu at all. :-)


// Function iec_scale picked from meterbridge by Steve Harris.
static int iec_scale(float db) {
         float def = 0.0f; /* Meter deflection %age */

         if (db < -70.0f) {
                 def = 0.0f;
         } else if (db < -60.0f) {
                 def = (db + 70.0f) * 0.25f;
         } else if (db < -50.0f) {
                 def = (db + 60.0f) * 0.5f + 5.0f;
         } else if (db < -40.0f) {
                 def = (db + 50.0f) * 0.75f + 7.5;
         } else if (db < -30.0f) {
                 def = (db + 40.0f) * 1.5f + 15.0f;
         } else if (db < -20.0f) {
                 def = (db + 30.0f) * 2.0f + 30.0f;
         } else if (db < 0.0f) {
                 def = (db + 20.0f) * 2.5f + 50.0f;
         } else {
                 def = 100.0f;
         }

         return (int)(def * 2.0f);
}

static void msleep(int n){
  usleep(n*1000);
}

static void print_ln(void){
  putchar('\n');
  //msleep(3);
}

static void print_console_top(void){
  if(use_vu){
    int lokke=0;
    char c='"';
    // Set cyan color
    printf("%c[36m",0x1b);

    //printf("****");
    printf("   |");
    for(lokke=0;lokke<vu_len;lokke++)
      putchar(c);
    printf("|");print_ln();
    printf("%c[0m",0x1b); // reset colors
    fflush(stdout);
  }else{
    //print_ln();
  }
}

static void init_vu(void){
  //int num_channels=4;
  int ch;
  for(ch=0;ch<num_channels;ch++)
    print_ln();
}

static void init_show_bufferusage(void){
  print_ln();
}


static void move_cursor_to_top(void){
  printf("%c[%dA",0x1b,
         use_vu&&show_bufferusage
         ? num_channels+1
         : use_vu
           ? num_channels
           : show_bufferusage
             ? 1
             : 0);
  printf("%c[0m",0x1b); // reset colors
  fflush(stdout);
}

static char *vu_not_recording="-----------Press <Return> to start recording------------";

// Console colors:
// http://www.linuxjournal.com/article/8603

static void print_console(bool move_cursor_to_top_doit,bool force_update){
  //int num_channels=4;
  int ch;
  char vol[vu_len+50];
  vol[2]          = ':';
  vol[3]          = '|';
  vol[4+vu_len+1] = 0;

  // Values have not been updated since last time. Return.
  if(force_update==false && vu_vals[0]==-1.0f)
    return;

  if(move_cursor_to_top_doit)
    move_cursor_to_top();

  if(use_vu){

    // Set cyan color
    printf("%c[36m",0x1b);

    for(ch=0;ch<num_channels;ch++){
      int   i;
      float val   = vu_vals[ch];
      int   pos;
      vu_vals[ch] = -1.0f;

      if(vu_dB)
        pos = iec_scale(20.0f * log10f(val * vu_bias)) * (vu_len) / 200;
      else
        pos = val*(vu_len);

      if (pos > vu_peaks[ch]) {
        vu_peaks[ch]    = pos;
        vu_peakvals[ch] = val;
        vu_times[ch]    = 0;
      } else if (vu_times[ch]++ > 40) {
        vu_peaks[ch]    = pos;
        vu_peakvals[ch] = val;
      }

      if(ch>9){
        vol[0] = '0'+ch/10;
        vol[1] = '0'+ch-(10*(ch/10));
      }else{
        vol[0] = '0';
        vol[1] = '0'+ch;
      }

      if (timemachine_mode==true && timemachine_recording==false) {

        for(i=0;i<pos && val>0.0f;i++)
          vol[4+i] = vu_not_recording[i];

        vol[4+pos]='\0';

        if(vu_peakvals[ch]>=1.0f)
          printf("%c[31m",0x1b); // Peaking, show red color

        printf("%s", vol);

        for(;i<vu_len;i++)
          vol[4+i] = vu_not_recording[i];

        printf("%c[33m",0x1b); // Yellow color

        vol[i+4]='\0';
        printf("%s", vol+4+pos);

        printf("%c[36m",0x1b); // back to cyan
        printf("|\n");

      } else {

        for(i=0;i<vu_len;i++)
          if(vu_peaks[ch]==i && vu_peakvals[ch]>0.0f)
            vol[4+i] = '*';
          else if(i<=pos && val>0.0f)
            vol[4+i] = '-';
          else
            vol[4+i] = ' ';

        if(vu_peakvals[ch]>=1.0f){
          vol[4+vu_len]='!';
          printf("%c[31m",0x1b); //red color
          puts(vol);
          printf("%c[36m",0x1b); // back to cyan
        }else{
          vol[4+vu_len]='|';
          puts(vol);
        }

      }
    }
  }

  if(show_bufferusage){
    int   num_bufleft = vringbuffer_writing_size(vringbuffer);
    int   num_buffers = (vringbuffer_reading_size(vringbuffer)+ vringbuffer_writing_size(vringbuffer));
    float buflen      = buffers_to_seconds(num_buffers);
    float bufleft     = buffers_to_seconds(num_bufleft);
    int   recorded_seconds = (int)frames_to_seconds(ATOMIC_GET(num_frames_recorded));
    if(timemachine_mode==true)
      recorded_seconds = (int)frames_to_seconds(num_frames_written_to_disk);
    int   recorded_minutes = recorded_seconds/60;

    char buffer_string[1000];
    {
      sprintf(buffer_string,"%.2fs./%.2fs",bufleft,buflen);
      int len_buffer=strlen(buffer_string);
      int i;
      for(i=len_buffer;i<14;i++)
        buffer_string[i]=' ';
      buffer_string[i]='\0';
    }

    printf("%c[32m"
           "Buffer: %s"
           "  Time: %d.%s%dm.  %s"
           "DHP: [%c]  "
           "Overruns: %d  "
           "Xruns: %d"
           "%c[0m",
           //fmaxf(0.0f,buflen-bufleft),buflen,
           0x1b, // green color
           buffer_string,
           recorded_minutes, recorded_seconds%60<10?"0":"", recorded_seconds%60, recorded_minutes<10?" ":"",
           disk_thread_has_high_priority?'x':' ',
           total_overruns,
           total_xruns,
           0x1b // reset color
           );
    print_ln();
  }else{
    printf("%c[0m",0x1b); // reset colors
    fprintf(stderr,"%c[0m",0x1b); // reset colors
  }
  fflush(stdout);
  fflush(stderr);
}



/////////////////////////////////////////////////////////////////////
//////////////////////// Helper thread //////////////////////////////
/////////////////////////////////////////////////////////////////////

#define MESSAGE_PREFIX ">>> "

static char message_string[5000]={0};

static volatile int helper_thread_running=0;
static int init_meterbridge_ports();

static bool is_helper_running=true;

static void *helper_thread_func(void *arg){
  (void)arg;

  helper_thread_running=1;

  if(use_vu||show_bufferusage)
    print_console_top();

  if(use_vu)
    init_vu();

  if(show_bufferusage)
    init_show_bufferusage();

  do{
    bool move_cursor_to_top_doit=true;

    if(message_string[0]!=0){
      if(use_vu || show_bufferusage){
	move_cursor_to_top();
        if(!use_vu){
          print_ln();
        }
	printf("%c[%dA",0x1b,1); // move up yet another line.
        msleep(5);
	printf("%c[31m",0x1b);   // set red color
	{ // clear line
	  int lokke;
	  for(lokke=0;lokke<vu_len+5;lokke++)
	    putchar(' ');
          print_ln();
	  printf("%c[%dA",0x1b,1); // move up again
          msleep(5);
	}
      }
      printf(MESSAGE_PREFIX);
      printf("%s",message_string);
      message_string[0]=0;
      move_cursor_to_top_doit=false;
      if(use_vu || show_bufferusage)
	print_console_top();
    }

    if(use_vu || show_bufferusage)
      print_console(move_cursor_to_top_doit,false);

    if(init_meterbridge_ports()==1 && use_vu==false && show_bufferusage==false) // Note, init_meterbridge_ports will usually exit at the top of the function, where it tests for ports_meterbridge!=NULL (this stuff needs to be handled better)
      break;

    msleep(1000/20);

  }while(is_helper_running);


  if(use_vu || show_bufferusage){
    print_console(true,true);
  }

  message_string[0]     = 0;
  helper_thread_running = 0;

  msleep(4);

  return NULL;
}


enum ThreadType{
  UNINITIALIZED_THREAD_TYPE,
  OTHER_THREAD,
  REALTIME_THREAD,
  MAIN_THREAD
};

static __thread enum ThreadType g_thread_type = UNINITIALIZED_THREAD_TYPE;


static pthread_mutex_t print_message_mutex = PTHREAD_MUTEX_INITIALIZER;
void print_message(const char *fmt, ...){
  if (absolutely_silent==true) return;

  if (g_thread_type == REALTIME_THREAD)
    // what?
    return;

  if(helper_thread_running==0 || write_to_stdout==true){

    va_list argp;
    va_start(argp,fmt);
    fprintf(stderr,"%c[31m" MESSAGE_PREFIX,0x1b);   // set red color
    vfprintf(stderr,fmt,argp);
    fprintf(stderr,"%c[0m",0x1b); // reset colors
    fflush(stderr);
    va_end(argp);

  }else{

    pthread_mutex_lock(&print_message_mutex);{

      while(message_string[0]!=0)
        msleep(2);

      va_list argp;
      va_start(argp,fmt);
      vsprintf(message_string,fmt,argp);
      va_end(argp);

      while(message_string[0]!=0)
        msleep(2);

    }pthread_mutex_unlock(&print_message_mutex);
  }

}


void setup_helper_thread (void){
  if(write_to_stdout==false){
    pthread_create(&helper_thread, NULL, helper_thread_func, NULL);
  }
}

static void stop_helper_thread(void){
  //helper_thread_running=0;
  is_helper_running=false;
  if(write_to_stdout==false){
    pthread_join(helper_thread, NULL);
  }

  /*
  if(use_vu||show_bufferusage){
    printf("%c[0m",0x1b); // reset colors
    usleep(1000000/2); // wait for terminal
  }
  */
}

/////////////////////////////////////////////////////////////////////
//////////////////////// DISK Thread hooks //////////////////////////
/////////////////////////////////////////////////////////////////////


#define ARGS_ADD_ARGV(FMT,ARG) \
  argv = (char**) realloc((void*)argv, (argc+2)*sizeof(char*)); \
  {                                                             \
  int ret = asprintf(&argv[argc++], FMT, ARG);                  \
  (void)ret;                                                    \
  }                                                             \
  argv[argc] = 0;

#define PREPARE_ARGV(CMD,ARGC,ARGV) \
{\
  char *bntmp = strdup(CMD); \
  ARGC=0; \
  ARGV=(char**) calloc(2,sizeof(char*)); \
  ARGV[ARGC++] = strdup(basename(bntmp));\
  free(bntmp); \
}

static void wait_child(int sig){
  (void)sig;
  wait(NULL);
}

static void call_hook(const char *cmd, int argc, char **argv){
  /* invoke external command */
  if (verbose==true) {
    fprintf(stderr, "EXE: %s ", cmd);
    for (argc=0;argv[argc];++argc) printf("'%s' ", argv[argc]);
    printf("\n");
  }

  pid_t pid=fork();

  if (pid==0) {
    /* child process */

    if(1){ /* redirect all output of child process*/
      /* one day this if(1) could become a global option */
      int fd;
      if((fd = open("/dev/null", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR))==-1){
	perror("open");
      }else{
	dup2(fd,STDOUT_FILENO);
	dup2(fd,STDERR_FILENO);
	close(fd);
      }
    }
    execvp (cmd, (char *const *) argv);
    print_message("EXE: error; exec returned.\n");
    //pause();
    exit(127);
  }

  /* parent/main process */
  if (pid < 0 ) {
    print_message("EXE: error; can not fork child process\n");
  }

  signal(SIGCHLD,wait_child);

  /* clean up */
  for (argc=0;argv[argc];++argc) {
    free(argv[argc]);
  }
  free (argv);
}

static void hook_file_opened(char *fn){
  char **argv; int argc;
  const char *cmd = hook_cmd_opened;
  if (!cmd) return;
  PREPARE_ARGV(cmd, argc, argv);
  ARGS_ADD_ARGV("%s", fn);
  call_hook(cmd, argc, argv);
}

static void hook_rec_timimg(char *fn, struct timespec start, jack_nframes_t latency){
  char **argv; int argc;
  const char *cmd = hook_cmd_timing;
  if (!cmd) return;
  PREPARE_ARGV(cmd, argc, argv);
  ARGS_ADD_ARGV("%s", fn);
  ARGS_ADD_ARGV("%ld", start.tv_sec);
  ARGS_ADD_ARGV("%ld", start.tv_nsec);
  ARGS_ADD_ARGV("%d", latency);
  call_hook(cmd, argc, argv);
}

static void hook_file_closed(char *fn, int xruns, int io_errors){
  char **argv; int argc;
  const char *cmd = hook_cmd_closed;
  if (!cmd) return;
  PREPARE_ARGV(cmd, argc, argv);
  ARGS_ADD_ARGV("%s", fn);
  ARGS_ADD_ARGV("%d", xruns);
  ARGS_ADD_ARGV("%d", io_errors);
  call_hook(cmd, argc, argv);
}

static void hook_file_rotated(char *oldfn, char *newfn, int num, int xruns, int io_errors){
  char **argv; int argc;
  const char *cmd = hook_cmd_rotate;
  if (!cmd) return;
  PREPARE_ARGV(cmd, argc, argv);
  ARGS_ADD_ARGV("%s", oldfn);
  ARGS_ADD_ARGV("%d", xruns);
  ARGS_ADD_ARGV("%d", io_errors);
  ARGS_ADD_ARGV("%s", newfn);
  ARGS_ADD_ARGV("%d", num);
  call_hook(cmd, argc, argv);
}


/////////////////////////////////////////////////////////////////////
//////////////////////// DISK ///////////////////////////////////////
/////////////////////////////////////////////////////////////////////

// These four variables are used in case we break the 4GB barriere for standard wav files.
static int num_files=1;
static int64_t disksize=0;
static bool is_using_wav=true;
static int bytes_per_frame;

static SNDFILE *soundfile=NULL;
static int64_t overruns=0;

#if HAVE_LIBLO
bool queued_file_rotate=false;
 void osc_stop() { SEM_SIGNAL(stop_sem); }
void osc_tm_start() { timemachine_recording=true; }
void osc_tm_stop() { program_ended_with_return=true; osc_stop(); }
#endif

static struct timespec rtime;
static DEFINE_ATOMIC(int, g_store_sync) = 0;
static int ssync_offset = 0;
static jack_nframes_t j_latency = 0;

#if HAVE_LAME
static FILE *mp3file = NULL;
static unsigned char *mp3buf;
static int mp3bufsize;

static int open_mp3file(void){
  buffer_interleaved = false;

  mp3bufsize = buffer_size_in_bytes * 10 * num_channels;
  if(mp3bufsize<4096*4) // lame_encode_flush requires at least 7200 bytes
    mp3bufsize=4096*4;

  mp3buf = malloc(mp3bufsize);

  lame = lame_init();
  if(lame==NULL){
    print_message("lame_init failed.\n");
    return 0;
  }

  lame_set_num_channels(lame, num_channels);

  lame_set_in_samplerate(lame,(int)jack_samplerate);

  if ((int)das_lame_samplerate == 0) {
	  lame_set_out_samplerate(lame,(int)jack_samplerate);
  } else {
	  lame_set_out_samplerate(lame,(int)das_lame_samplerate);
  }

  lame_set_quality(lame,das_lame_quality);

  if(das_lame_bitrate!=-1){
    lame_set_brate(lame, das_lame_bitrate);
    lame_set_VBR_min_bitrate_kbps(lame, lame_get_brate(lame));
  }

  {
    int ret = lame_init_params(lame);
    if(ret<0){
      print_message("Illegal parameters for lame. (%d)\n",ret);
      return 0;
    }
  }

  if(lame_get_num_channels(lame)!=num_channels){
    print_message("Error. lame does not support %d channel mp3 files.\n",num_channels);
    return 0;
  }

  mp3file = fopen(filename,"w");
  if(mp3file == NULL){
    print_message("Can not open file \"%s\" for output (%s)\n", filename, strerror(errno));
    return 0;
  }

  hook_file_opened(filename);
  return 1;
}
#endif



#include "setformat.c"


static int open_soundfile(void){
  int subformat;

  SF_INFO sf_info; memset(&sf_info,0,sizeof(sf_info));

  if(write_to_stdout==true) {
	hook_file_opened("file:///stdout");
    return 1;
	}


  if(filename==NULL){
    if (rotateframe>0){ // always use .NUM. with rotation
      filename=my_calloc(1,strlen(base_filename)+500);
      sprintf(filename,"%s.%0*d.%s",base_filename,leading_zeros+1,0,soundfile_format);
    }else{
      filename=strdup(base_filename);
    }
  }

#if HAVE_LAME
  if(write_to_mp3==true)
    return open_mp3file();
#endif


  /////////////////////////
  // Code below for sndfile
  /////////////////////////

  sf_info.samplerate = jack_samplerate;
  sf_info.channels   = num_channels;

  {
    int format=getformat(soundfile_format);
    if(format==-1 && num_channels>2){
      fprintf(stderr,"Warning, the format \"%s\" is not supported. Using \"%s\" instead.\n", soundfile_format, soundfile_format_multi);
      sf_info.format=MORE_THAN_TWO_CHANNELS_FORMAT;
    }else if(format==-1){
      fprintf(stderr,"Warning, the format \"%s\" is not supported. Using \"%s\" instead.\n", soundfile_format, soundfile_format_one_or_two);
      sf_info.format=ONE_OR_TWO_CHANNELS_FORMAT;
    }else
      sf_info.format=format;
  }

  is_using_wav = ((sf_info.format & SF_FORMAT_TYPEMASK) == SF_FORMAT_WAV)?true:false;

  switch (bitdepth) {
  case 8: subformat = SF_FORMAT_PCM_U8;
    break;
  case 16: subformat = SF_FORMAT_PCM_16;
    break;
  case 24: subformat = SF_FORMAT_PCM_24;
    break;
  case 32: subformat = SF_FORMAT_PCM_32;
    break;
  default:
    if(!strcasecmp("flac",soundfile_format) || !strcasecmp("sds",soundfile_format)){
      bitdepth=24;
      subformat=SF_FORMAT_PCM_24;
    }else if((sf_info.format & SF_FORMAT_SUBMASK)) {
      // getformat has set subformat (SF_FORMAT_VORBIS or SF_FORMAT_OPUS).
      subformat = sf_info.format & SF_FORMAT_SUBMASK;
    }else{
      bitdepth=32; // sizeof(float)*8 would be incorrect in case sizeof(float)!=4
      subformat = SF_FORMAT_FLOAT;
    }
    break;
  }

  bytes_per_frame=bitdepth/8;

  sf_info.format |= subformat;

  if(sf_format_check(&sf_info)==0){
    fprintf (stderr, "\nFileformat not supported by libsndfile. Try other options.\n");
    return 0;
  }

  if(write_to_stdout==true)
    soundfile=sf_open_fd(fileno(stdout),SFM_WRITE,&sf_info,false); // ??? this code is never reached.
  else
    soundfile=sf_open(filename,SFM_WRITE,&sf_info);

  // debugging lines below.
  //static int ai=0;
  //ai++;
  if(soundfile==NULL){ // || ai==10){
    fprintf (stderr, "\nCan not open sndfile \"%s\" for output (%s)\n", filename,sf_strerror(NULL));
    return 0;
  }

#if HAVE_OGG
  if (subformat == SF_FORMAT_VORBIS && ogg_vbr_quality>=-0.1 && ogg_vbr_quality<=1.0){ // assuming quality range from libvorbis
	  double vbr_quality = (double) ogg_vbr_quality; // convert from float to double (libvorbis uses float BTW)
	  sf_command(soundfile, SFC_SET_VBR_ENCODING_QUALITY, &vbr_quality, sizeof(double));
  }
#endif

  hook_file_opened(filename);

  return 1;
}


#if HAVE_LAME
static int mp3_write(void *das_data,size_t frames,bool do_flush);
#endif

static void close_soundfile(void){

  if(write_to_stdout==false){
    if(soundfile!=NULL)
      sf_close (soundfile);
#if HAVE_LAME
    if(mp3file!=NULL){
      mp3_write(NULL,0,true); // flush
      lame_close(lame);
      fclose(mp3file);
    }
#endif
  }

  hook_file_closed(filename, total_overruns + total_xruns, disk_errors);

  if (overruns > 0) {
    print_message("jack_capture failed with a total of %d overruns.\n", total_overruns);
    print_message("   try a bigger buffer than -B %f\n",min_buffer_time);
  }
  if (disk_errors > 0)
    print_message("jack_capture failed with a total of %d disk errors.\n",disk_errors);
  if (total_xruns > 0)
    print_message("jack_capture encountered %d jack x-runs.\n", total_xruns);

  disk_errors = 0;
  total_overruns = 0;
  total_xruns = 0;
}

static int rotate_file(size_t frames, int reset_totals){
  ATOMIC_SET(g_store_sync, 0);
	// Explanation: new file will already contain the CURRENT buffer!
	// but sync-timeframe will only be saved on the start of next jack cycle.
	//
	// -> save current audio ringbuffer-size -> subtract from next sync timestamp.
	ssync_offset = frames;

  sf_close(soundfile);

  char *filename_new;
  filename_new=my_calloc(1,strlen(base_filename)+500);
  sprintf(filename_new,"%s.%0*d.%s",base_filename,leading_zeros+1,num_files,soundfile_format);
  print_message("Closing %s, and continue writing to %s.\n",filename,filename_new);
  num_files++;

  hook_file_rotated(filename, filename_new, num_files, total_overruns + total_xruns, disk_errors);

  free(filename);
  filename=filename_new;
  disksize=0;

  if (reset_totals) {
    if (overruns > 0) {
      print_message("jack_capture failed with a total of %d overruns.\n", total_overruns);
      print_message("   try a bigger buffer than -B %f\n",min_buffer_time);
    }
    if (disk_errors > 0)
      print_message("jack_capture failed with a total of %d disk errors.\n",disk_errors);
    if (total_xruns > 0)
      print_message("jack_capture encountered %d jack x-runs.\n", total_xruns);

    /* reset totals on file-rotate */
    disk_errors = 0;
    total_overruns = 0;
    total_xruns = 0;
  }

  if(!open_soundfile()) return 0;

  return 1;
}

// To test filelimit handler, uncomment two next lines.
//#undef UINT32_MAX
//#define UINT32_MAX 100000+(1024*1024)

static int handle_filelimit(size_t frames){
  int new_bytes=frames*bytes_per_frame*num_channels;

  if(is_using_wav && (disksize + ((int64_t)new_bytes) >= UINT32_MAX-(1024*1024))){ // (1024*1024) should be enough for the header.
    print_message("Warning. 4GB limit on wav file almost reached.");
    if (!rotate_file(frames, false)) return 0;
  }
#if HAVE_LIBLO
  else if (queued_file_rotate) {
    queued_file_rotate=false;
    print_message("Note. file-name rotation request received.");
    if (!rotate_file(frames, true)) return 0;
  }
#endif
  else if (rotateframe > 0 && disksize > (rotateframe*bytes_per_frame*num_channels) ) {
    if (!rotate_file(frames, false)) return 0;
	}
  disksize+=new_bytes;
  return 1; }



// stdout_write made by looking at http://mir.dnsalias.com/oss/jackstdout/start
// made by Robin Gareus.
static int stdout_write(sample_t *buffer,size_t frames){
  static char *tobuffer=NULL;
  static int bufferlen=0;
  int bytes_to_write=frames*num_channels*2;

  if(bufferlen<bytes_to_write){
    free(tobuffer);
    tobuffer=my_calloc(1,bytes_to_write);
    bufferlen=bytes_to_write; }

  {
    unsigned int i;
    int writeplace=0;
    for(i=0;i<frames*num_channels;i++){
      int d = (int) rint(buffer[i]*32767.0);
      tobuffer[writeplace++] = (unsigned char) (d&0xff);
      tobuffer[writeplace++] = (unsigned char) (((d&0xff00)>>8)&0xff); } }

  {
    int   fd           = fileno(stdout);
    char *tobuffer_use = tobuffer;

    while(bytes_to_write > 0){
      int written=write(fd,tobuffer_use,bytes_to_write);
      if(written==-1){
	fprintf(stderr,"Error writing to stdout.\n");
	break;
      }
      bytes_to_write -= written;
      tobuffer_use   += written; } }

  return 1; }

#if HAVE_LAME
static int mp3_write(void *das_data,size_t frames,bool do_flush){
  int size;

  if(do_flush){
    size = lame_encode_flush(lame, mp3buf, mp3bufsize);
    //print_message("mp3 flush size: %d\n",size);
  }else{
    sample_t *data1=(sample_t*)das_data;
    sample_t *data2=&data1[frames];
    size = lame_encode_buffer_float(lame, data1,data2, frames, mp3buf, mp3bufsize);
  }

  if(size>0)
    fwrite(mp3buf,size,1,mp3file);

  return 1;
}
#endif

static int disk_write(void *data,size_t frames){

  num_frames_written_to_disk += frames;

  if(write_to_stdout==true)
    return stdout_write(data,frames);

#if HAVE_LAME
  if(write_to_mp3==true)
    return mp3_write(data,frames,false);
#endif

  if(soundfile==NULL)
    return 0;

  if(!handle_filelimit(frames))
    return 0;

  if((size_t)sf_writef_float(soundfile,data,frames) != frames){
    print_message("Error. Can not write sndfile (%s)\n",
		sf_strerror(soundfile)
		);
    disk_errors++;
    return 0;
  }
  return 1;
}


static int disk_write_overruns(int num_overruns){
  if(verbose==true)
    print_message(
                  "jack_capture failed writing %d frame%s. Some parts of the recording will contain silence.\n"
                  "    Try a bigger buffer than -B %f\n%s",
                  num_overruns,num_overruns==1 ? "" : "s",
                  min_buffer_time,
                  ATOMIC_GET(is_running) ? "Continue recording...\n" : ""
                  );

  overruns+=num_overruns;

  while(num_overruns>0){
    int size=JC_MIN(block_size,num_overruns);
    if( ! disk_write(empty_buffer,size))
      return 0;
    num_overruns-=size;
  }

  return 1;
}

static void disk_thread_control_priority(void){
  int adjusted_writing_size = vringbuffer_writing_size(vringbuffer);
  if (timemachine_mode==true)
    adjusted_writing_size += seconds_to_blocks(timemachine_prebuffer*jack_samplerate);

  if(1
     && disk_thread_has_high_priority==false
     && vringbuffer_reading_size(vringbuffer) >= adjusted_writing_size
     && use_jack_freewheel==false
     )
    {
      if(set_high_priority()==true){
        disk_thread_has_high_priority=true;
        print_message("Less than half the buffer used. Setting higher priority for the disk thread.\n");
      }else{
        static bool message_sent=false;
        if(message_sent==false)
          print_message("Error. Could not set higher priority for disk thread.\n");
        message_sent=true; } } }

static enum vringbuffer_receiver_callback_return_t disk_callback(vringbuffer_t *vrb,bool first_time,void *element){
  static bool printed_receive_message=false;
  buffer_t *buffer=(buffer_t*)element;

  if (first_time==true) {
    return true;
  }

  if (timemachine_mode==true && timemachine_recording==false) {
    int num_buffers = vringbuffer_reading_size(vrb);
    if (buffers_to_seconds(num_buffers) > timemachine_prebuffer)
      return VRB_CALLBACK_USED_BUFFER; // i.e throw away the buffer.
    else
      return VRB_CALLBACK_DIDNT_USE_BUFFER;
  }

  if (timemachine_mode==true && printed_receive_message==false){
    print_message("Recording. Press <Return> to stop.\n");
    printed_receive_message=true; }

  if(use_jack_transport==true && printed_receive_message==false){
    print_message("Received JackTranportRolling. Recording.\n");
    printed_receive_message=true; }

  if(use_jack_freewheel==true && printed_receive_message==false){
    print_message("Entered Jack Freewheeling. Recording.\n");
    printed_receive_message=true; }

  disk_thread_control_priority();


  if (ATOMIC_COMPARE_AND_SET_INT(g_store_sync, 1, 2)) {

    hook_rec_timimg(filename, rtime, j_latency);

    if (create_tme_file) { /* write .tme info-file */
      /*subtract port latency.*/
      int64_t lat_nsec = 1000000000 * j_latency / jack_samplerate;
      int64_t lat_sec = lat_nsec/1000000000;
      lat_nsec = lat_nsec%1000000000;

      if (rtime.tv_nsec >= lat_nsec) rtime.tv_nsec-=lat_nsec; else {rtime.tv_nsec+=(1000000000-lat_nsec); rtime.tv_sec--;}
      rtime.tv_sec-=lat_sec;

      /* subtract (buffer) offset after file-rotate */
      int64_t sync_nsec = (ssync_offset%((int)jack_samplerate))*1000000000/jack_samplerate;
      int64_t sync_sec  = ssync_offset/((int)jack_samplerate);

      if (rtime.tv_nsec > sync_nsec) rtime.tv_nsec-=sync_nsec; else {rtime.tv_nsec+=(1000000000-sync_nsec); rtime.tv_sec--;}
      rtime.tv_sec-=sync_sec;
      ssync_offset = 0;

      /* ok, write to file */
      FILE *file = fopen(string_concat(filename, ".tme"),"w");
      if(file) {
	fprintf(file, "%ld.%ld\n", rtime.tv_sec, rtime.tv_nsec);
	fprintf(file, "# port-latency: %d frames\n", j_latency);
	fprintf(file, "# sample-rate : %f samples/sec\n", jack_samplerate);

	char tme[64]; struct tm time;
	gmtime_r(&rtime.tv_sec, &time);
	strftime(tme, 63, "%F %T", &time);
	fprintf(file, "# system-time : %s.%ld UTC\n", tme, rtime.tv_nsec);

	fclose(file);
      }
    }
  }

  if( buffer->overruns > 0)
    disk_write_overruns(buffer->overruns);

  disk_write(buffer->data,buffer->pos);

  return VRB_CALLBACK_USED_BUFFER;}


static void cleanup_disk(void){

  // Adding silence at the end. Not much point.
  if(unreported_overruns>0)
    disk_write_overruns(unreported_overruns);

  close_soundfile();

  if(verbose==true)
    fprintf(stderr,"disk thread finished\n");
}





/////////////////////////////////////////////////////////////////////
//////////////////////// JACK PROCESS ///////////////////////////////
/////////////////////////////////////////////////////////////////////


static void send_buffer_to_disk_thread(buffer_t *buffer){
  buffer->overruns = unreported_overruns;
  vringbuffer_return_writing(vringbuffer,buffer);
  unreported_overruns = 0;
}


static void process_fill_buffer(sample_t *in[],buffer_t *buffer,int i,int end){
  sample_t *data=buffer->data;
  int pos=buffer->pos*num_channels;
  int ch;

  if(buffer_interleaved == true){
    for(;i<end;i++){
      for(ch=0;ch<num_channels;ch++){
        sample_t val=in[ch][i];
        data[pos++]=val;
        val=fabsf(val);
        if(val>safe_float_read(&vu_vals[ch]))
          safe_float_write(&vu_vals[ch], val);
      }
    }
  }else{
    int start_i = i;
    for(ch=0;ch<num_channels;ch++){
      sample_t *curr_in=in[ch];
      float max_vu=safe_float_read(&vu_vals[ch]);
      for(i = start_i; i<end ; i++){
        sample_t val=curr_in[i];
        data[pos++]=val * 32767.9; // weird lame format (lame is currently the only one using non-interleaved buffers, so the multiplication can be done here)
        val=fabsf(val);
        if(val>max_vu)
          max_vu=val;
      }
      safe_float_write(&vu_vals[ch], max_vu);
    }
  }
  //fprintf(stderr,"pos: %d %d\n",pos,num_channels);
  buffer->pos=pos/num_channels;
}

static bool process_new_current_buffer(int frames_left){
  if (use_jack_freewheel==true) {
    while (vringbuffer_writing_size(vringbuffer)==0)
      msleep(2);
  }

  current_buffer=(buffer_t*)vringbuffer_get_writing(vringbuffer);
  if(current_buffer==NULL){
    total_overruns++;
    unreported_overruns += frames_left;
    return false;
  }
  current_buffer->pos=0;
  return true;
}

static void process_fill_buffers(int jack_block_size){
  sample_t *in[num_channels];
  int i=0,ch;

  jack_port_t **ports = ATOMIC_GET(g_ports);

  for(ch=0;ch<num_channels;ch++)
    in[ch]=jack_port_get_buffer(ports[ch],jack_block_size);

  if(current_buffer==NULL && process_new_current_buffer(jack_block_size)==false)
    return;

  while(i<jack_block_size){
    int size=JC_MIN(jack_block_size - i,
                    block_size - current_buffer->pos
                    );

    process_fill_buffer(in,current_buffer,i,i+size);

    i+=size;

    if(current_buffer->pos == block_size){
      send_buffer_to_disk_thread(current_buffer);
      if(process_new_current_buffer(jack_block_size-i)==false)
        return;
    }

  }
}

static bool jack_transport_started=false;
static bool jack_freewheel_started=false;

enum ProcessState{
  NOT_STARTED,
  HANDLING_LATENCY,
  RECORDING,
  RECORDING_FINISHED
};

static enum ProcessState process_state=NOT_STARTED;

static int process(jack_nframes_t nframes, void *arg){
  (void)arg;

  if (g_thread_type == UNINITIALIZED_THREAD_TYPE)
    g_thread_type = REALTIME_THREAD;

  jack_transport_state_t jack_transport_state=JackTransportStopped;

  // jack_transport
  if(use_jack_transport==true){
    jack_transport_state=jack_transport_query(client,NULL);
    if(jack_transport_state==JackTransportRolling){
      jack_transport_started=true;
    }

    if(jack_transport_started==false)
      return 0;
  }

  // jack_freewheel
  if (use_jack_freewheel==true) {
    if (freewheel_mode > 0)
      jack_freewheel_started=true;

    if(jack_freewheel_started==false)
      return 0;
  }

  if(ATOMIC_GET(is_initialized)==false)
    return 0;

  if(ATOMIC_GET(is_running)==false)
    return 0;

  if(process_state==RECORDING_FINISHED)
    return 0;

  jack_port_t **ports = ATOMIC_GET(g_ports);

  if (ATOMIC_GET(g_store_sync)==0) {
#ifndef NEW_JACK_LATENCY_API
    int ch;
    j_latency=0;
    for(ch=0;ch<num_channels;ch++) {
      const jack_nframes_t jpl= jack_port_get_total_latency(client,ports[ch]);
      if (j_latency < jpl) j_latency = jpl;
    }
#endif
    clock_gettime(CLOCK_REALTIME, &rtime);
    ATOMIC_SET(g_store_sync, 1);
  }

  if(fixed_duration==true){     // User has specified a duration
    int num_frames;

    num_frames=JC_MIN(nframes,num_frames_to_record - ATOMIC_GET(num_frames_recorded));

    if(num_frames>0)
      process_fill_buffers(num_frames);

    ATOMIC_ADD(num_frames_recorded, num_frames);

    if(ATOMIC_GET(num_frames_recorded)==num_frames_to_record){
      send_buffer_to_disk_thread(current_buffer);
      SEM_SIGNAL(stop_sem);
      process_state=RECORDING_FINISHED;
    }

  }else{

    process_fill_buffers(nframes);

    ATOMIC_ADD(num_frames_recorded, nframes);

    if((   use_jack_transport==true && jack_transport_state==JackTransportStopped)
       || (use_jack_freewheel==true && freewheel_mode==0)
       )
      {
        send_buffer_to_disk_thread(current_buffer);
        SEM_SIGNAL(stop_sem);
        process_state=RECORDING_FINISHED;
      }

  }

  vringbuffer_trigger_autoincrease_callback(vringbuffer);

  return 0;
}

static int xrun(void *arg){
  (void)arg;
  total_xruns++;
  return 0;
}


/////////////////////////////////////////////////////////////////////
/////////////////// METERBRIDGE /////////////////////////////////////
/////////////////////////////////////////////////////////////////////


static char* meterbridge_jackname;
pid_t meterbridge_pid;


static void start_meterbridge(int num_channels){

  meterbridge_jackname=my_calloc(1,5000);

  sprintf(meterbridge_jackname,"%s_meterbridge",jack_get_client_name(client));
  //meterbridge -t vu -n meterbri xmms-jack_12250_000:out_0 xmms-jack_12250_000:out_1

  meterbridge_pid=fork();
  if(meterbridge_pid==0){
    char *argv[100+num_channels];
    argv[0] = "meterbridge";
    argv[1] = "-t";
    argv[2] = meterbridge_type;
    argv[3] = "-n";
    argv[4] = meterbridge_jackname;
    argv[5] = "-r";
    argv[6] = meterbridge_reference;
    {
      int ch;
      for(ch=0;ch<num_channels;ch++){
	argv[7+ch]="x";
      }
      argv[7+ch]=NULL;
    }


    if(1){ // Same as adding ">/dev/null 2>/dev/null" in a shell
      int fd;
      if((fd = open("/dev/null", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR))==-1){
	perror("open");
      }else{
	dup2(fd,STDOUT_FILENO);
	dup2(fd,STDERR_FILENO);
	close(fd);
      }
    }

    execvp("meterbridge",argv);

    pause(); // Prevent anyone else using the meterbridge_pid. (parent kills meterbridge_pid at exit, whether it was successfully started or not)

    exit(0);
  }
}


static void wake_up_connection_thread(void);
int connect_meterbridge=0;

static int init_meterbridge_ports(){
  if(ports_meterbridge!=NULL || use_meterbridge==false)
    return 0;

  {
    char portname[5000];
    sprintf(portname,"%s:meter_1",meterbridge_jackname);
    jack_port_t *port1=jack_port_by_name(client,portname);

    if(port1==NULL){
      return 0;
    }

    {
      jack_port_t **ports_meterbridge2 = (jack_port_t **) my_calloc (sizeof (jack_port_t *),num_channels);

      ports_meterbridge2[0]=port1;
      {
	int ch;
	for(ch=1;ch<num_channels;ch++){
	  sprintf(portname,"%s:meter_%d",meterbridge_jackname,ch+1);
	  ports_meterbridge2[ch]=jack_port_by_name(client,portname);
	  if(ports_meterbridge2[ch]==NULL){
	    print_message("Warning! Something is very wrong with the meterbridge.\n"); // Well, maybe that port hasn't been initializied yet. Must fix some
	    free(ports_meterbridge2);
	    return 0;
	  }
	}
      }
      ports_meterbridge=ports_meterbridge2;
      connect_meterbridge=1;
      wake_up_connection_thread();
      //connect_ports(ports_meterbridge);
      return 1;
    }
  }
}




/////////////////////////////////////////////////////////////////////
/////////////////// JACK CONNECTIONS ////////////////////////////////
/////////////////////////////////////////////////////////////////////


static void free_jack_connections(bool using_calloc, const char **connections) {
  if (connections==NULL)
    return;
  if (using_calloc)
    free(connections);
  else
    jack_free(connections);
}

static int compare(const void *a, const void *b){
  return strcmp((const char*)a,(const char*)b);
}

static int reconnect_ports_questionmark(void){
  int ch;

  jack_port_t **ports = ATOMIC_GET(g_ports);

  for(ch=0;ch<num_channels;ch++){
    bool using_calloc;
    const char **connections1 = portnames_get_connections(ch, &using_calloc);
    const char **connections2 = jack_port_get_all_connections(client,ports[ch]);

    int memb1 = findnumports(connections1);
    int memb2 = findnumports(connections2);

    if(memb1==0 && memb2==0)
      continue;

    if(memb1!=memb2){
      free_jack_connections(using_calloc, connections1);
      free_jack_connections(false, connections2);
      return 1;
    }

    qsort(connections1,memb1,sizeof(char*),compare);
    qsort(connections2,memb2,sizeof(char*),compare);

    {
      int lokke = 0;
      for(lokke=0;lokke<memb1;lokke++){
        //printf("connect_ports \"%s\" \"%s\" \n",connections1[lokke],connections2[lokke]);
        if(strcmp(connections1[lokke],connections2[lokke])){
          free_jack_connections(using_calloc, connections1);
          free_jack_connections(false, connections2);
          return 1;
        }
      }
    }

    free_jack_connections(using_calloc, connections1);
    free_jack_connections(false, connections2);
  }

  return 0;
}


static void disconnect_ports(jack_port_t** ports){
  int ch;

  if(ports==NULL)
    return;

  for(ch=0;ch<num_channels;ch++){
    int lokke = 0;
    const char **connections = jack_port_get_all_connections(client,ports[ch]);

    if(connections)
      for(;connections[lokke]!=NULL;lokke++)
        jack_disconnect(client,connections[lokke],jack_port_name(ports[ch]));

    free_jack_connections(false, connections);
  }
}


static void connect_ports(jack_port_t** ports){
  int ch;

  if(ports==NULL)
    return;

  for(ch=0;ch<num_channels;ch++){
    int lokke = 0;

    bool using_calloc;
    const char **connections = portnames_get_connections(ch, &using_calloc);

    while(connections && connections[lokke] != NULL){
      int err=jack_connect(client,connections[lokke],jack_port_name(ports[ch]));
      if(err!=0)
	print_message("\nCould not connect input port %s to %s, errorcode %s\n",
                      jack_port_name (ports[ch]), connections[lokke],strerror(err));
      lokke++;
    }
    free_jack_connections(using_calloc, connections);
  }
}

#ifdef __APPLE__
static semaphore_t connection_semaphore;
#else
static sem_t connection_semaphore;
#endif


static void* connection_thread(void *arg){
  (void)arg;

  while(1){
#ifdef __APPLE__
    semaphore_wait(connection_semaphore);
#else
    sem_wait(&connection_semaphore);
#endif
    if(ATOMIC_GET(is_running)==false)
      goto done;
    if(connect_meterbridge==1){
      connect_ports(ports_meterbridge);
      connect_meterbridge=0;
      continue;
    }
    if(ATOMIC_GET(is_initialized) && reconnect_ports_questionmark()){
      if(silent==false)
	print_message("Reconnecting ports.\n");

      jack_port_t **ports = ATOMIC_GET(g_ports);

      disconnect_ports(ports);
      connect_ports(ports);

      disconnect_ports(ports_meterbridge);
      connect_ports(ports_meterbridge);
    }
  }

 done:
  if(verbose==true)
    fprintf(stderr,"connection thread finished\n");
  return NULL;
}

static void wake_up_connection_thread(void){
  if(use_manual_connections==false)
#ifdef __APPLE__
    semaphore_signal(connection_semaphore);
#else
    sem_post(&connection_semaphore);
#endif
}

static void start_connection_thread(void){
#ifdef __APPLE__
  semaphore_create(mach_task_self(), &connection_semaphore, SYNC_POLICY_FIFO, 0);
#else
  sem_init(&connection_semaphore,0,0);
#endif
  pthread_create(&connect_thread,NULL,connection_thread,NULL);
}

static void stop_connection_thread(void){
  wake_up_connection_thread();
  pthread_join(connect_thread, NULL);
}

static int graphordercallback(void *arg){
  (void)arg;

  if (!freewheel_mode)
    wake_up_connection_thread();
  return 0;
}

static void freewheelcallback(int starting, void *arg){
  (void)arg;

  freewheel_mode = starting;

  if (use_jack_freewheel==true && starting==0) {
    /* wait for buffer to flush to disk */
    while(vringbuffer_reading_size(vringbuffer) > 0)
      msleep(2);
  }
}

#if NEW_JACK_LATENCY_API
static void jack_latency_cb(jack_latency_callback_mode_t mode, void *arg) {
  (void)arg;

  int ch;
  jack_latency_range_t jlty;
  jack_nframes_t max_latency = 0;

  if (mode != JackCaptureLatency) return;

  jack_port_t **ports = ATOMIC_GET(g_ports);

  if (!ports) return;

  for(ch=0;ch<num_channels;ch++) {
    if(ports[ch]==0) continue;
    jack_port_get_latency_range(ports[ch], JackCaptureLatency, &jlty);
    if (jlty.max > max_latency) max_latency= jlty.max;
  }
  j_latency = max_latency;
}
#endif

static void create_ports(void){
  jack_port_t** ports = my_calloc (sizeof (jack_port_t *),num_channels);
  {
    int ch;
    for(ch=0;ch<num_channels;ch++) {
      char name[500];
      sprintf(name,"input%d",ch+1);
      ports[ch]=jack_port_register(client,name,JACK_DEFAULT_AUDIO_TYPE,JackPortIsInput|JackPortIsTerminal,0);
      if(ports[ch]==0){
	print_message("Unable to register input port \"%s\"!\n", name);
	jack_client_close(client);
	exit(1);
      }
    }
  }

  ATOMIC_SET(g_ports, ports);
}






/////////////////////////////////////////////////////////////////////
/////////////////// INIT / WAIT / SHUTDOWN //////////////////////////
/////////////////////////////////////////////////////////////////////


static void finish(int sig){
  (void)sig;
  //turn_on_echo(); //Don't think we can do this from a signal handler...
  SEM_SIGNAL(stop_sem);
}

static void jack_shutdown(void *arg){
  (void)arg;
  fprintf(stderr,"jack_capture: JACK shutdown.\n");
  jack_has_been_shut_down=true;
  SEM_SIGNAL(stop_sem);
}


static jack_client_t *new_jack_client(char *name){
  jack_status_t status;
  jack_client_t *client=jack_client_open(name,JackNoStartServer,&status,NULL);

  if(client==NULL){
    print_message("jack_client_open() failed, "
		"status = 0x%2.0x\n", status);
    exit(1);
  }

  return client;
}


static void start_jack(void){
  static bool I_am_already_called=false;
  if(I_am_already_called) // start_jack is called more than once if the --port argument has been used.
    return;

  client=new_jack_client(jackname);

  jack_samplerate=jack_get_sample_rate(client);
  block_size=jack_get_buffer_size(client);

  I_am_already_called=true;
}



static pthread_t keypress_thread={0};
static void* keypress_func(void* arg){
  (void)arg;

  char gakk[64];

  turn_off_echo();

  char *fgets_result;

 again:

  fgets_result = fgets(gakk,49,stdin);

  if(timemachine_mode==true && timemachine_recording==false){
    timemachine_recording = true;
    goto again;
  }

  if(fgets_result!=NULL)
    ungetc('\n',stdin);

  program_ended_with_return = true;

  SEM_SIGNAL(stop_sem);
  return NULL;
}

static void start_keypress_thread(void){
  pthread_create(&keypress_thread, NULL, keypress_func, NULL);
}

static const char *advanced_help =
  "jack_capture  [--bitdepth n] [--channels n] [--port port] [filename]\n"
  "              [ -b        n] [ -c        n] [ -p    port]\n"
  "\n"
  "\"bitdepth\" is by default FLOAT. It can be set to either 8, 16, 24 or 32. (for relevant formats)\n"
  "\"channels\" is by default 2.\n"
  "\"port\"     is by default set to the two first physical outputs. The \"port\" argument can be\n"
  "           specified more than once.\n"
  "\"filename\" is by default autogenerated to \"jack_capture_<number>.<format>\"\n"
  "           Beware that you might risk overwriting an old file by using this option.\n"
  "           By not using this option, you will not overwrite an old file.\n"
  "           See also the option --filename-prefix\n"
  "           If the filename has a valid file extension then this will be used to format the output file.\n"
  "           So that \"jack_capture ouput.ogg\" will produce an ogg file, unless a format argument is provided.\n"
  "\n"
  "\n"
  "Additional arguments:\n"
  "[--recording-time n] or [-d n]    -> Recording is stopped after \"n\" seconds.\n"
  "                                    This options also starts jack_capture in --no-stdin mode.\n"
  "                                    To stop recording before the timeout, one can press Ctrl-C.)\n"
  "[--filename-prefix s]/[-fp n]     -> Sets first part of the autogenerated filename.\n"
  "                                    (default is \"jack_capture_\")\n"
  "[--leading-zeros n] or [-z n]     -> \"n\" is the number of zeros to in the autogenerated filename.\n"
  "                                    (-z 2 -> jack_capture_001.wav, and so on.) (default is 1)\n"
  "[--format format] or [-f format]  -> Selects fileformat provided by libsndfile.\n"
  "                                     See http://www.mega-nerd.com/libsndfile/api.html#open\n"
  "                                     This option will overwrite any format specified by the output filename.\n"
  "                                     (Default is wav for 1 or 2 channels, and wavex for more than 2.)\n"
  "[--print-formats] or [-pf]        -> Prints all sound formats provided to sndfile to screen and then\n"
  "                                     exits.\n"
  "[--version] or [-v]               -> Prints out version.\n"
  "[--silent] or [-s]                -> Suppresses some common messages printed to the terminal.\n"
  "[--absolutely-silent] or [-as]    -> Suppresses all messages printed to the terminal.\n"
  "                                     Warning: libraries used by jack_capture may still print messages.\n"
  "[--verbose] or [-V]               -> Prints some extra information to the terminal.\n"
  "[--mp3] or [-mp3]                 -> Writes to an mp3 file using liblame (LAME).\n"
  "                                     This option will overwrite any format specified by the output filename.\n"
  "                                     (the --format option has no effect using this option)\n"
  "[--mp3-quality n] or [-mp3q n]    -> Selects mp3 quality provided by liblame. n=0 is best, n=9 is worst.\n"
  "                                     Default n is 2. (0 uses the most amount of CPU, 9 uses the least)\n"
  "[--mp3-bitrate n] or [-mp3b n]    -> Selects mp3 bitrate (in kbit/s).\n"
  "                                     Default is set by liblame. (currently 128)\n"
  "[--mp3-samplerate n] or [-mp3s n] -> Sets output sample rate for LAME\n"
  "[--ogg-quality n] or [-oq n]      -> Set Vorbis quality (0.0 low - 1.0 high)\n"
  "                                     default is set by libvorbis (~0.5)\n"
  "[--write-to-stdout] or [-ws]      -> Writes 16 bit little endian to stdout. (the --format option, the\n"
  "                                     --mp3 option, and some others have no effect using this option)\n"
  "[--disable-meter] or [-dm]        -> Disable console meter.\n"
  "[--hide-buffer-usage] or [-hbu]   -> Disable buffer usage updates in the console.\n"
  "[--disable-console] or [-dc]      -> Disable console updates. Same as \"-dm -hbu\".\n"
  "[--no-stdin] or [-ns]             -> Don't read the console. (i.e pressing return won't stop recording.)\n"
  "[--daemon]                        -> Same as writing \"--no-stdin --absolutely-silent\".\n"
  "[--linear-meter] or [-lm]         -> Use linear scale for the console meter (default is dB scale)\n"
  "[--dB-meter-reference or [-dBr]   -> Specify reference level for dB meter. (default=0)\n"
  "[--meterbridge] or [-mb]          -> Start up meterbridge to monitor recorded sound.\n"
  "[--meterbridge-type] or [-mt]     -> Specify type. vu (default), ppm, dpm, jf or sco.\n"
  "[--meterbridge-reference]/[-mr]   -> Specify reference level for meterbidge.\n"
  "[--jack-transport]/[-jt]          -> Start program, but do not start recording until jack transport has started rolling\n"
  "                                     When jack transport stops, the recording is also stopped, and the program ends.\n"
  "[--jack-transport-multi]/[-jtm]   -> Similar to --jack-transport, but do not end program when jack transport stops.\n"
  "                                     Instead, record to a new file when jack_transport starts rolling again.\n"
  "                                     (not implemented yet)\n"
  "[--jack-freewheeling]/[-jf]       -> Start program, but do not start recording until jack enters freewheeling mode\n"
  "                                     When jack leaves freewheeling, the recording is also stopped, and the program ends.\n"
  "[--jack-name]/[-jn]               -> Set name of this jack_capture instance in the jack patchbay.\n"
  "[--manual-connections]/[-mc]      -> jack_capture will not connect any ports for you. \n"
  "[--bufsize s] or [-B s]           -> Initial/minimum buffer size in seconds. Default is 8 seconds\n"
  "                                     for mp3 files, and 4 seconds for all other formats.\n"
  "[--maxbufsize] or [-MB]           -> Maximum buffer size in seconds jack_capture will allocate.\n"
  "                                     Default is 40. (Buffer is automatically increased during\n"
  "                                     recording when needed. But it will never go beyond this size.)\n"
  "[--filename] or [-fn]             -> Specify filename.\n"
  "                                     Beware that you might risk overwriting an old file by using this option.\n"
  "                                     To only set prefix, use --filename-prefix / -fp instead.\n"
  "                                     (It's usually easier to set last argument instead of using this option)\n"
  "[--osc] or [-O]                   -> Specify OSC port number to listen on. see --help-osc\n"
  "[--timestamp] or [-S]             -> create a FILENAME.tme file for each recording, storing\n"
  "                                     the system-time corresponding to the first audio sample.\n"
  "[--rotatefile N] or [-Rf N]       -> force rotate files every N audio-frames.\n"
  "[--hook-open c] or [-Ho c]        -> command to execute on successful file-open. (see below)\n"
  "[--hook-close c] or [-Hc c]       -> command to execute when closing the session. (see below)\n"
  "[--hook-rotate c] or [-Hr c]      -> command to execute on file-name-rotation. (see below)\n"
  "[--hook-timing c] or [-Ht c]      -> callback when first audio frame is received. (see below)\n"
  "[--timemachine] or [-tm]          -> jack_capture operates in \"timemachine\" mode.\n"
  "[--timemachine-prebuffer s]       -> Specify (in seconds) how long time to prebuffer in timemachine mode.\n"
  "[ -tmpb s]                        -> ------------------------ \"\" ----------------------------------------\n"
  "\n"
  " All hook options take a full-path to an executable as argument.\n"
  " The commands are executed in a fire-and-forget style upon internal events.\n"
  " All output of the hooks is discarded.\n"
  " Paramaters passed to the hook-scripts:\n"
  "  open:   CMD <filename>\n"
  "  close:  CMD <filename> <xrun-count> <io-error-count>\n"
  "  rotate: CMD <filename> <xrun-count> <io-error-count> <new-filename> <seq-number>\n"
  "  timing: CMD <filename> <time-sec> <time-nses> <jack-port-latency in frames>\n"
  "\n"
  "Examples:\n"
  "\n"
  "To record a stereo file of what you hear:\n"
  "  $jack_capture\n"
  "\n"
  "To record a stereo file of what you hear in the flac format:\n"
  " $jack_capture -f flac\n"
  "\n"
  "To record a stereo file of what you hear in the ogg format:\n"
  " $jack_capture -f ogg\n"
  "\n"
  "To record a stereo file of what you hear in the mp3 format:\n"
  " $jack_capture -mp3\n"
  "\n"
  "To record a named stereo file of what you hear in the ogg format:\n"
  " $jack_capture output.ogg\n"
  "\n"
  "To record a stereo file of what you hear in the wav format:\n"
  "  $jack_capture --port system:playback_1 --port system:playback_2\n"
  "****************************************************************************\n"
  "**** NOTE! The above example does _exactly_ the same as the default!!!  ****\n"
  "****************************************************************************\n"
  "\n"
  "Same result as above, but using a different syntax:\n"
  "  $jack_capture --channels 2 --port system:playback*\n"
  "\n"
  "To record the output from jamin:\n"
  "  $jack_capture --port jamin:out* sound_from_jamin.wav\n"
  "\n"
  "To record all sound coming in to jamin:\n"
  "  $jack_capture --port jamin:in* sound_to_jamin.wav\n"
  "\n"
  "To record all sound coming in and out of jamin:\n"
  "  $jack_capture --port jamin* sound_to_and_from_jamin.wav\n"
  "\n"
  "To record a stereo file from the soundcard:\n"
  "  $jack_capture -c 2 -p system:capture*\n"
  "\n";

static const char *osc_help =
  "If called with -O <udp-port-number>, jack-capture can be remote-controlled.\n"
	"The following OSC (Open Sound Control) messages are understood:\n"
  "\n"
  "  /jack_capture/stop        (no arguments) -- stop recording and exit\n"
  "  /jack_capture/rotate      (no arguments) -- rotate file-name\n"
  "  /jack_capture/tm/start    (no arguments) -- in timemachine-mode: start recording.\n"
  "  /jack_capture/tm/stop     (no arguments) -- in timemachine-mode: stop recording.\n"
  "\n"
  "Example:\n"
  "  jack_capture -O 7777\n"
	"  oscsend localhost 7777 /jack_capture/stop\n"
  "The 'oscsend' utility comes with liblo, deb-pkg: liblo-utils.\n"
  "\n"
  "Caveat:\n"
	"When used with hook-commands (-Hr, -Hc, etc) the OSC port will be in use\n"
	"until the last of the hook-commands has terminated.\n"
	"Launching a new instance of jack_capture with the same OSC port while some\n"
	"hook-script of a previous instance is still running, will prevent jack_capture\n"
	"from listening on that UDP-port (non fatal - \"port is in use\" warning).\n"
	"jack_capture will work fine, but can not be remote-controlled.\n"
  "\n";

void init_arguments(int argc, char *argv[]){

  OPTARGS_BEGIN("\n"
                "To record what you hear, just run\n"
                "\n"
                "     jack_capture\n"
                "\n"
                "To list advanced options, run\n"
                "\n"
                "     jack_capture --advanced-options (or --help2)\n"
                "\n"
                )
    {
      OPTARG("--advanced-options","--help2") printf("%s",advanced_help);exit(0);
      OPTARG("--help-osc","--help3") printf("%s",osc_help);exit(0);
      OPTARG("--bitdepth","-b") bitdepth = OPTARG_GETINT();
      OPTARG("--bufsize","-B") min_buffer_time = OPTARG_GETFLOAT(); min_buffer_time=JC_MAX(0.01,min_buffer_time);
      OPTARG("--maxbufsize","-MB") max_buffer_time = OPTARG_GETFLOAT();
      OPTARG("--channels","-c") num_channels = OPTARG_GETINT();
      OPTARG("--filename-prefix","-fp") filename_prefix = OPTARG_GETSTRING();
      OPTARG("--leading-zeros","-z") leading_zeros = OPTARG_GETINT();
      OPTARG("--recording-time","-d"){
        recording_time       = OPTARG_GETFLOAT();
        start_jack();
        num_frames_to_record = seconds_to_frames(recording_time);
        no_stdin             = true;
        fixed_duration       = true;
      }
      OPTARG("--port","-p") { start_jack() ; portnames_add(OPTARG_GETSTRING()); }
      OPTARG("--format","-f"){
        soundfile_format=OPTARG_GETSTRING();
        if(!strcmp("mp3",soundfile_format)){
          write_to_mp3 = true;
        }
        soundfile_format_is_set=true;
      }
      OPTARG("--version","-v") puts(VERSION);exit(0);
      OPTARG("--silent","-s") silent=true;
      OPTARG("--absolutely-silent","-as") absolutely_silent=true; use_vu=false; silent=true; show_bufferusage=false;
      OPTARG("--verbose","-V") verbose=true;
      OPTARG("--print-formats","-pf") print_all_formats();exit(0);
      OPTARG("--mp3","-mp3") write_to_mp3 = true;
      OPTARG("--mp3-quality","-mp3q") das_lame_quality = OPTARG_GETINT(); write_to_mp3 = true;
      OPTARG("--mp3-bitrate","-mp3b") das_lame_bitrate = OPTARG_GETINT(); write_to_mp3 = true;
	  OPTARG("--mp3-samplerate", "-mp3s") das_lame_samplerate = OPTARG_GETINT(); write_to_mp3 = true;
      OPTARG("--ogg-quality","-oq") ogg_vbr_quality = OPTARG_GETFLOAT(); soundfile_format_is_set=true; soundfile_format="ogg";
      OPTARG("--write-to-stdout","-ws") write_to_stdout=true;use_vu=false;show_bufferusage=false;
      OPTARG("--disable-meter","-dm") use_vu=false;
      OPTARG("--hide-buffer-usage","-hbu") show_bufferusage=false;
      OPTARG("--disable-console","-dc") use_vu=false;show_bufferusage=false;
      OPTARG("--no-stdin","-ns") no_stdin=true;
      OPTARG("--daemon","") no_stdin=true; absolutely_silent=true; use_vu=false; silent=true; show_bufferusage=false;
      OPTARG("--linear-meter","-lm") vu_dB=false;
      OPTARG("--dB-meter-reference","-dBr") vu_dB=true;vu_bias=powf(10.0f,OPTARG_GETFLOAT()*-0.05f);//from meterbridge
      OPTARG("--meterbridge","-mb") use_meterbridge=true;
      OPTARG("--meterbridge-type","-mt") use_meterbridge=true;meterbridge_type=OPTARG_GETSTRING();
      OPTARG("--meterbridge-reference","-mr") use_meterbridge=true;meterbridge_reference=OPTARG_GETSTRING();
      OPTARG("--jack-transport","-jt") use_jack_transport=true;
      OPTARG("--jack-freewheel","-jf") use_jack_freewheel=true;
      OPTARG("--manual-connections","-mc") use_manual_connections=true;
      OPTARG("--filename","-fn") base_filename=OPTARG_GETSTRING();
      OPTARG("--osc","-O") {
#if HAVE_LIBLO
        osc_port=atoi(OPTARG_GETSTRING());
#else
        fprintf(stderr,"osc not supported. liblo was not installed when compiling jack_capture\n");
        exit(3);
#endif
      }
      OPTARG("--hook-open","-Ho")   hook_cmd_opened = OPTARG_GETSTRING();
      OPTARG("--hook-close","-Hc")  hook_cmd_closed = OPTARG_GETSTRING();
      OPTARG("--hook-rotate","-Hr") hook_cmd_rotate = OPTARG_GETSTRING();
      OPTARG("--hook-timing","-Ht") hook_cmd_timing = OPTARG_GETSTRING();
      OPTARG("--timestamp","-S") create_tme_file=true;
      OPTARG("--rotatefile","-Rf") rotateframe = OPTARG_GETINT();
      OPTARG("--timemachine","-tm") timemachine_mode = true;
      OPTARG("--timemachine-prebuffer","-tmpb") timemachine_prebuffer=OPTARG_GETFLOAT();
	  OPTARG("--jack-name","-jn") jackname=OPTARG_GETSTRING();
      OPTARG_LAST() base_filename=OPTARG_GETSTRING();
    }OPTARGS_END;

  if(use_jack_freewheel==true && use_jack_transport==true){
    fprintf(stderr,"--jack-transport and --jack-freewheel are mutually exclusive options.\n");
    exit(2);
	}

  if(write_to_mp3==true){
#if HAVE_LAME
    soundfile_format="mp3";
    soundfile_format_is_set=true;
    if(min_buffer_time<=0.0f)
      min_buffer_time = DEFAULT_MIN_MP3_BUFFER_TIME;
#else
    fprintf(stderr,"mp3 not supported. liblame was not installed when compiling jack_capture\n");
    exit(2);
#endif
  }else{
    if(min_buffer_time<=0.0f)
      min_buffer_time = DEFAULT_MIN_BUFFER_TIME;
  }

  verbose_print("main() determine file format from filename\n");
  // If no format specified try to determine format from the base_filename
  if(!soundfile_format_is_set && base_filename) {
    char *ext = strrchr(base_filename, '.');
    if(ext) {
      ext++; // skip leading .
      soundfile_format = ext;
      soundfile_format_is_set = true;

      // handle mp3
      if(strcmp(soundfile_format, "mp3") == 0) {
#if HAVE_LAME
        write_to_mp3 = true;
        // the min_buffer_time may have been set before we knew it was mp3 format
        if(min_buffer_time<=0.0f || min_buffer_time == DEFAULT_MIN_BUFFER_TIME)
          min_buffer_time = DEFAULT_MIN_MP3_BUFFER_TIME;
#else
        fprintf(stderr,"mp3 not supported. liblame was not installed when compiling jack_capture\n");
        exit(2);
#endif
      }
    }
  }

  if(timemachine_mode==true) {
    min_buffer_time += timemachine_prebuffer;
    max_buffer_time += timemachine_prebuffer;
  }

  verbose_print("main() find default file format\n");
  if(soundfile_format_is_set==false){
    if(num_channels>2)
      soundfile_format=soundfile_format_multi;
    else
      soundfile_format=soundfile_format_one_or_two;
  }


  verbose_print("main() find filename\n");
  // Find filename
  {
    if(base_filename==NULL){
      base_filename=my_calloc(1,5000);
      for(int try=1;try<100000;try++){
	sprintf(base_filename,"%s%0*d.%s",filename_prefix,leading_zeros+1,try,soundfile_format);
	if(access(base_filename,F_OK)) break;
      }
    }
  }

}


char *string_concat(char *s1,char *s2){
  char *ret=malloc(strlen(s1)+strlen(s2)+4);
  sprintf(ret,"%s%s",s1,s2);
  return ret;
}

int string_charpos(char *s, char c){
  int pos=0;
  while(s[pos]!=0){
    if(s[pos]==c)
      return pos;
    pos++;
  }
  return -1;
}

char *substring(char *s,int start,int end){
  char *ret       = calloc(1,end-start+1);
  int   read_pos  = start;
  int   write_pos = 0;

  while(read_pos<end)
    ret[write_pos++] = s[read_pos++];

  return ret;
}

// modifies input.
char *strip_whitespace(char *s){
  char *ret=s;

  // strip before
  while(isspace(ret[0]))
    ret++;


  // strip after
  int pos=strlen(ret)-1;
  while(isspace(ret[pos])){
    ret[pos]=0;
    pos--;
  }


  return ret;
}


char **read_config(int *argc,int max_size){
  char **argv=calloc(max_size,sizeof(char*));
  *argc = 0;

  if(getenv("HOME")==NULL)
    return argv;

  FILE *file = fopen(string_concat(getenv("HOME"), "/.jack_capture/config"),"r");
  if(file==NULL)
    return argv;

  char *readline = malloc(512);
  while(fgets(readline,510,file)!=NULL){
    char *line = strip_whitespace(readline);
    if(line[0]==0 || line[0]=='#')
      continue;

    if(*argc>=max_size-3){
      fprintf(stderr,"Too many arguments in config file.\n");
      exit(-2);
    }

    int split_pos = string_charpos(line,'=');
    if(split_pos!=-1){
      char *name = strip_whitespace(substring(line,0,split_pos));
      char *value = strip_whitespace(substring(line,split_pos+1,strlen(line)));
      if(strlen(name)>0 && strlen(value)>0){
        argv[*argc] = string_concat("--",name);
        *argc       = *argc + 1;

        if(value[0]=='~')
          value = string_concat(getenv("HOME"),&value[1]);

        argv[*argc] = value;
        *argc       = *argc + 1;
        //printf("pos: %d -%s- -%s-\n",split_pos,name,value);
      }
    }else{
      argv[*argc] = string_concat("--",line);
      *argc       = *argc + 1;
    }
  }

  return argv;
}

void init_various(void){
  verbose_print("main() init jack 1\n");
  // Init jack 1
  {
    if(use_manual_connections==false)
      start_connection_thread();
    start_jack();
    portnames_add_defaults();
  }

  verbose_print("main() init buffers\n");
  // Init buffers
  {
    buffers_init();
  }

  if (access(base_filename, F_OK)==0){
    print_message("\n");
    print_message("!!! Warning, Overwriting existing file %s !!!\n", base_filename);
    print_message("\n");
  }

  verbose_print("main() Open soundfile and setup disk callback.\n");
  // Open soundfile and start disk thread
  {
    if(!open_soundfile()){
      jack_client_close(client);
      exit(-2);
    }

    vringbuffer_set_receiver_callback(vringbuffer,disk_callback);
  }

  verbose_print("main() Init waiting.\n");
  // Init waiting.
  {
    SEM_INIT(stop_sem);

    signal(SIGINT,finish);
    signal(SIGTERM,finish);

    if(no_stdin==false)
      start_keypress_thread();
  }

  verbose_print("main() Init jack 2.\n");
  // Init jack 2
  {
    jack_set_process_callback(client, process, NULL);
    jack_set_xrun_callback(client, xrun, NULL);

    jack_on_shutdown(client, jack_shutdown, NULL);

#if NEW_JACK_LATENCY_API
    jack_set_latency_callback (client, jack_latency_cb, NULL);
#endif

    if(use_manual_connections==false)
      jack_set_graph_order_callback(client,graphordercallback,NULL);

    jack_set_freewheel_callback(client,freewheelcallback,NULL);

    if (jack_activate(client)) {
      fprintf (stderr,"\nCan not activate client");
      exit(-2);
    }

    create_ports();
    if(use_manual_connections==false)
      connect_ports(ATOMIC_GET(g_ports));
  }


  verbose_print("main() Everything initialized.\n");
  // Everything initialized.
  //   (The threads are waiting for this variable, not the other way around, so now it just needs to be set.)
  {
    ATOMIC_SET(is_initialized, true);
    wake_up_connection_thread(); // Usually (?) not necessarry, but just in case.
  }

  verbose_print("main() Start meterbridge.\n");
  // Start meterbridge
  {
    if(use_meterbridge)
      start_meterbridge(num_channels);
  }

  verbose_print("main() Print some info.\n");
  // Print some info
  {
    if(fixed_duration==true){
      if(silent==false)
        print_message(
                    "Recording to \"%s\". The recording is going\n"
                    MESSAGE_PREFIX "to last %lf seconds Press <Ctrl-C> to stop before that.\n",
                    base_filename,
                    recording_time);
    }else{
      if(silent==false) {
        if (timemachine_mode==true) {
          print_message("Waiting to start recording of \"%s\"\n",base_filename);
          print_message("Press <Ctrl-C> to stop recording and quit.\n");
        }else
          print_message("Recording to \"%s\". Press <Return> or <Ctrl-C> to stop.\n",base_filename);
        //fprintf(stderr,"Recording to \"%s\". Press <Return> or <Ctrl-C> to stop.\n",base_filename);
      }
    }
  }

  verbose_print("main() Start helper thread.\n");
  // Start the helper thread, which takes care of the console
  {
    setup_helper_thread();
  }

  //noecho();

}


void wait_until_recording_finished(void){
  verbose_print("main() Wait.\n");

  if(use_jack_transport==true)
    print_message("Waiting for JackTransportRolling.\n");
  if(use_jack_freewheel==true)
    print_message("Waiting for Jack Freewheeling .\n");


  SEM_WAIT(stop_sem);

  turn_on_echo();
  if(helper_thread_running==1){
    //      if(use_vu || show_bufferusage)
    //	printf("%c[%dA",0x1b,1); // Pressing return moves the cursor.
    if(silent==false){  // messy...
      print_message("Please wait while writing all data to disk. (shouldn't take long)\n");
      msleep(2);
    }
    //print_message("%c[%dAPlease wait while writing all data to disk. (shouldn't take long)\n",0x1b,1); // necessary.
  }
}



void stop_recording_and_cleanup(void){
  verbose_print("main() Stop recording and clean up.\n");

  ATOMIC_SET(is_running, false);

  if(use_manual_connections==false)
    stop_connection_thread();

  vringbuffer_stop_callbacks(vringbuffer); // Called before cleanup_disk to make sure all data are sent to the callback.

  cleanup_disk();

  if(use_meterbridge)
    kill(meterbridge_pid,SIGINT);

  stop_helper_thread();

#if HAVE_LIBLO
  shutdown_osc();
#endif

  if(jack_has_been_shut_down==false)
    jack_client_close(client);

  if(silent==false){
    usleep(50); // wait for terminal
    fprintf(stderr,"%c[31m",0x1b); //red color
    fprintf(stderr,"Finished.");
    fprintf(stderr,"%c[0m",0x1b); // reset colors
    fprintf(stderr,"\n");
  }
}


void append_argv(char **v1,const char **v2,int len1,int len2,int max_size){
  int write_pos = len1;
  int read_pos  = 0;

  if(len1+len2>=max_size){
    fprintf(stderr,"Too many arguments.\n");
    exit(-3);
  }

  while(write_pos<len1+len2)
    v1[write_pos++] = (char*)v2[read_pos++];
}


#if 0
void print_argv(char **argv,int argc){
  int i=0;
  printf("print arguments. argc: %d. ",argc);
  for(i=0;i<argc;i++){
    printf("<%s>, ",argv[i]);
  }
  printf("-- finished. \n");
}
#endif


int main (int argc, char *argv[]){
  //get_free_mem();
  //mainpid=getpid();
  g_thread_type = MAIN_THREAD;

  char **org_argv = argv;

  // remove exe name from argument list.
  argv = &argv[1];
  argc = argc-1;

  // get arguments both from command line and config file (config file is read first, so that command line can override)
  int c_argc;
  char **c_argv = read_config(&c_argc,500);
  append_argv(c_argv,(const char**)argv,c_argc,argc,500);
  //print_argv(c_argv,c_argc+argc);

  init_arguments(c_argc+argc,c_argv);

#if HAVE_LIBLO
  if (init_osc(osc_port)) {
    /* no OSC available */
    osc_port=-1;
  }
#endif

  init_various();

  wait_until_recording_finished();

  stop_recording_and_cleanup();

  if (timemachine_mode==true && program_ended_with_return==true){
    execvp (org_argv[0], (char *const *) org_argv);
    print_message("Error: exec returned: %s.\n", strerror(errno));
    exit(127);
  }

  return 0;
}