/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
*/
/* args.c  created by Andrew Richards  <A.Richards@phys.canterbury.ac.nz>
*/

#include "amp.h"
#include "audio.h"

#ifdef __BEOS__
#define __STDC__               1
#include <getopt.h>
#else
#include "getopt.h"
#endif

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


void
displayDisclaimer()
{
        /* print a warm, friendly message
         */
        msg("\namp %d.%d.%d, (C) Tomislav Uzelac 1996,1997\n",MAJOR,MINOR,PATCH);
        msg("THIS PROGRAM COMES WITH ABSOLUTELY NO WARRANTY\n");
        msg("PLEASE READ THE DOCUMENTATION FOR DETAILS\n\n");
}

void
displayUsage()
{
        int idx;

        /* Losts of printfs for stupid compilers that can't handle literal newlines */
        /* in strings */

        printf("\
usage: amp [options] [ MPEG audio streams... ]\n\
       amp -convert [ MPEG-audio stream ] [ output file ]\n\n\
  -h, -help           display this usage information and exit\n\
  -v, -version        display the version information and exit\n\
  -c, -convert        convert the MPEG audio stream to output file format\n\
  -p, -play           play the specified MPEG audio streams (default action)\n\
  -q, -quiet          supress printing of messages to STDERR\n\
  -b, -buffer <size>  set the audio buffer size to <size> k\n\
  -d, -dump           dump binary data to STDERR\n\
  -s, -frame          show a frame counter\n\
  -t, -time           show time\n\
  -g, -gui            output messages to stdout instead of stderr\n\
                      (for use with xmpeg3 or similar GUIs)\n\
  -w                  wav output\n\
      -downmix        downmix stereo streams to one channel\n\
      -nobuffer       do not use an audio buffer\n\
      -volume <vol>   set the volume to <vol> (0-100)\n\
      -debug <opts..> When compiled in debug <opt, opt2,...> code sections\n\
                      Options: ");

        for(idx=0;debugLookup[idx].name!=0;idx++)
                printf("%s,",debugLookup[idx].name);
        printf("\010 \n");

        exit(0);
}

void
displayVersion()
{
        printf("amp - %d.%d.%d\n",MAJOR,MINOR,PATCH);
        exit(0);
}



int
argVal(char *name, char *num, int min, int max)
{
        int val;
        
        val=atoi(num);
        if ((val<min) || (val>max))
                die("%s parameter %d - out of range (%d-%d)\n",name,val,min,max);
        return(val);
}


int
args(int argc,char **argv)
{
        int c;

        static int showusage=0, showversion=0;

        AUDIO_BUFFER_SIZE=300*1024;
        A_DUMP_BINARY=FALSE;
        A_QUIET=FALSE;
        A_FORMAT_WAVE=FALSE;
        A_SHOW_CNT=FALSE;
        A_SET_VOLUME=-1;
        A_SHOW_TIME=0;
        A_AUDIO_PLAY=TRUE;
        A_WRITE_TO_FILE=FALSE;
        A_MSG_STDOUT=FALSE;
        A_DOWNMIX=FALSE;

        while (1) {
                static struct option long_options[] =   {
                        {"help", no_argument, 0, 'h'},
                        {"debug", required_argument, 0, 1},
                        {"version", no_argument, 0, 'v'},
                        {"quiet", no_argument, 0, 'q'},
                        {"play", no_argument, 0, 'p'},
                        {"convert", no_argument, 0, 'c'},
                        {"volume", required_argument, 0, 2},
                        {"time", no_argument, 0, 't'},
                        {"frame", no_argument, 0, 's'},
                        {"gui", no_argument, 0, 'g'},
                        {"buffer", required_argument, 0, 'b'},
                        {"nobuffer", no_argument, &AUDIO_BUFFER_SIZE, 0},
                        {"dump", required_argument, 0, 'd'},
                        {"downmix",no_argument,0,'x'},
                        {0, 0, 0, 0}
                };

                c = getopt_long_only(argc, argv, "xqgstwdpcb:vh", long_options,0);

                if (c == -1) break;
                switch (c) {
                case    1 : debugSetup(optarg); break;
                case    2 : A_SET_VOLUME=argVal("Volume",optarg,0,100); break;
                case 'q': A_QUIET=TRUE; break;
                case 's': A_SHOW_CNT=TRUE; break;
                case 't': A_SHOW_TIME=TRUE; break;
                case 'w': A_FORMAT_WAVE=TRUE; break;
                case 'd': A_DUMP_BINARY=TRUE; break;
                case 'g': A_MSG_STDOUT=TRUE; break;
                case 'p': A_AUDIO_PLAY=TRUE;A_WRITE_TO_FILE=FALSE;break;
                case 'c': A_AUDIO_PLAY=FALSE;A_WRITE_TO_FILE=TRUE;break;
                case 'b': 
#if !defined(LINUX_REALTIME)
                          AUDIO_BUFFER_SIZE=1024*argVal("Buffer size",optarg,64,10000);
#endif
                          break;
                case 'v': showversion=1; break;
                case 'h': showusage=1; break;
                case 'x': A_DOWNMIX=TRUE;break;
                case '?': exit(1);
                case ':': printf("Missing parameter for option -%c\n",c); break;
                }
        }
        if (showversion) displayVersion();
        if (showusage) displayUsage();
        displayDisclaimer();

        return(optind);
}