parse.c

MP3编码程序和资料

#include "util.h"
#include "id3tag.h"
#include "get_audio.h"
#include "brhist.h"
#include "version.h"




/************************************************************************
*
* license
*
* PURPOSE:  Writes version and license to the file specified by #stdout#
*
************************************************************************/

void lame_print_license(lame_global_flags *gfp,char *name)  /* print version,license & exit */
{
  LAME_PRINT_VERSION1();
  PRINTF1("\n");
  PRINTF1("Read the file \"LICENSE\"\n");
  PRINTF1("\n");
  LAME_NORMAL_EXIT();
}



/************************************************************************
*
* usage
*
* PURPOSE:  Writes command line syntax to the file specified by #stderr#
*
************************************************************************/

void lame_usage(lame_global_flags *gfp,char *name)  /* print syntax & exit */
{
  LAME_PRINT_VERSION2();
  PRINTF2("\n");
  PRINTF2("USAGE   :  %s [options] <infile> [outfile]\n",name);
  PRINTF2("\n<infile> and/or <outfile> can be \"-\", which means stdin/stdout.\n");
  PRINTF2("\n");
  PRINTF2("Try \"%s --help\"     for more information\n",name);
  PRINTF2(" or \"%s --longhelp\" for a complete options list\n",name);
  LAME_ERROR_EXIT();
}



/************************************************************************
*
* usage
*
* PURPOSE:  Writes command line syntax to the file specified by #stdout#
*           but only the most important ones, to fit on a vt100 terminal
*
************************************************************************/

void lame_short_help(lame_global_flags *gfp,char *name)  /* print syntax & exit */
{
  LAME_PRINT_VERSION1(); /* prints two lines */
  PRINTF1("\n");
  PRINTF1("USAGE   :  %s [options] <infile> [outfile]\n",name);
  PRINTF1("\n<infile> and/or <outfile> can be \"-\", which means stdin/stdout.\n");
  PRINTF1("\n");
  PRINTF1("OPTIONS :\n");
  PRINTF1("    -b bitrate      set the bitrate, default 128kbps\n");
  PRINTF1("    -f              fast mode (lower quality)\n");
  PRINTF1("    -h              higher quality, but a little slower.  Recommended.\n");
  PRINTF1("    -k              keep ALL frequencies (disables all filters)\n");
  PRINTF1("    -m mode         (s)tereo, (j)oint, (f)orce or (m)ono  (default j)\n");
  PRINTF1("                    force = force ms_stereo on all frames.\n");
  PRINTF1("    -V n            quality setting for VBR.  default n=%i\n",gfp->VBR_q);
  PRINTF1("\n");
  PRINTF1("    --preset type   type must be phone, voice, fm, tape, hifi, cd or studio\n");
  PRINTF1("                    \"--preset help\" gives some more infos on these\n");
  PRINTF1("\n");
  PRINTF1("    --longhelp      full list of options\n");
  PRINTF1("\n");
 
  LAME_NORMAL_EXIT();
}

/************************************************************************
*
* usage
*
* PURPOSE:  Writes command line syntax to the file specified by #stdout#
*
************************************************************************/

void lame_help(lame_global_flags *gfp,char *name)  /* print syntax & exit */
{
  LAME_PRINT_VERSION1();
  PRINTF1("\n");
  PRINTF1("USAGE   :  %s [options] <infile> [outfile]\n",name);
  PRINTF1("\n<infile> and/or <outfile> can be \"-\", which means stdin/stdout.\n");
  PRINTF1("\n");
  PRINTF1("OPTIONS :\n");
  PRINTF1("  Input options:\n");
  PRINTF1("    -r              input is raw pcm\n");
  PRINTF1("    -x              force byte-swapping of input\n");
  PRINTF1("    -s sfreq        sampling frequency of input file(kHz) - default 44.1kHz\n");
  PRINTF1("    --mp3input      input file is a MP3 file\n");
  PRINTF1("    --ogginput      input file is a Ogg Vorbis file\n");
  PRINTF1("\n");
  PRINTF1("  Operational options:\n");
  PRINTF1("    -m <mode>       (s)tereo, (j)oint, (f)orce or (m)ono  (default j)\n");
  PRINTF1("                    force = force ms_stereo on all frames.\n");
  PRINTF1("    -a              downmix from stereo to mono file for mono encoding\n");
  PRINTF1("    -d              allow channels to have different blocktypes\n");
  PRINTF1("    -S              don't print progress report, VBR histograms\n");
  PRINTF1("    --ogg           encode to Ogg Vorbis instead of MP3\n");
  PRINTF1("    --freeformat    produce a free format bitstream\n");
  PRINTF1("    --decode        input=mp3 file, output=raw pcm\n");
  PRINTF1("    --comp  <arg>   choose bitrate to achive a compression ratio of <arg>\n");
  PRINTF1("    --athonly       only use the ATH for masking\n");
  PRINTF1("    --noath         disable the ATH for masking\n");
  PRINTF1("    --noshort       do not use short blocks\n");
  PRINTF1("    --voice         experimental voice mode\n");
  PRINTF1("    --preset type   type must be phone, voice, fm, tape, hifi, cd or studio\n");
  PRINTF1("                    \"--preset help\" gives some more infos on these\n");
  PRINTF1("\n");
  PRINTF1("  CBR (constant bitrate, the default) options:\n");
  PRINTF1("    -h              higher quality, but a little slower.  Recommended.\n");
  PRINTF1("    -f              fast mode (very low quality)\n");
  PRINTF1("    -b <bitrate>    set the bitrate in kbs, default 128kbps\n");
  PRINTF1("\n");
  PRINTF1("  VBR options:\n");
  PRINTF1("    -v              use variable bitrate (VBR)\n");
  PRINTF1("    --vbr-old       use old variable bitrate (VBR) routine\n");
  PRINTF1("    --vbr-new       use new variable bitrate (VBR) routine\n");
  PRINTF1("    -V n            quality setting for VBR.  default n=%i\n",gfp->VBR_q);
  PRINTF1("                    0=high quality,bigger files. 9=smaller files\n");
  PRINTF1("    -b <bitrate>    specify minimum allowed bitrate, default 32kbs\n");
  PRINTF1("    -B <bitrate>    specify maximum allowed bitrate, default 256kbs\n");
  PRINTF1("    -F              strictly enforce the -b option, for use with players that\n");
  PRINTF1("                    do not support low bitrate mp3 (Apex AD600-A DVD/mp3 player)\n");
  PRINTF1("    -t              disable Xing VBR informational tag\n");
  PRINTF1("    --nohist        disable VBR histogram display\n");
  PRINTF1("\n");
  PRINTF1("    --abr <bitrate> specify average bitrate desired (instead of quality)\n");
  PRINTF1("\n");
  PRINTF1("  MP3 header/stream options:\n");
  PRINTF1("    -e <emp>        de-emphasis n/5/c  (obsolete)\n");
  PRINTF1("    -c              mark as copyright\n");
  PRINTF1("    -o              mark as non-original\n");
  PRINTF1("    -p              error protection.  adds 16bit checksum to every frame\n");
  PRINTF1("                    (the checksum is computed correctly)\n");
  PRINTF1("    --nores         disable the bit reservoir\n");
  PRINTF1("    --strictly-enforce-ISO   comply as much as possible to ISO MPEG spec\n");
  PRINTF1("\n");
  PRINTF1("  Filter options:\n");
  PRINTF1("    -k              keep ALL frequencies (disables all filters)\n");
  PRINTF1("  --lowpass <freq>        frequency(kHz), lowpass filter cutoff above freq\n");
  PRINTF1("  --lowpass-width <freq>  frequency(kHz) - default 15%% of lowpass freq\n");
  PRINTF1("  --highpass <freq>       frequency(kHz), highpass filter cutoff below freq\n");
  PRINTF1("  --highpass-width <freq> frequency(kHz) - default 15%% of highpass freq\n");
  PRINTF1("  --resample <sfreq>  sampling frequency of output file(kHz)- default=automatic\n");
  PRINTF1("  --cwlimit <freq>    compute tonality up to freq (in kHz) default 8.8717\n");
  PRINTF1("\n");
  PRINTF1("  Specifying any of the following options will add an ID3 tag:\n");
  PRINTF1("     --tt \"title\"     title of song (max 30 chars)\n");
  PRINTF1("     --ta \"artist\"    artist who did the song (max 30 chars)\n");
  PRINTF1("     --tl \"album\"     album where it came from (max 30 chars)\n");
  PRINTF1("     --ty \"year\"      year in which the song/album was made (max 4 chars)\n");
  PRINTF1("     --tc \"comment\"   additional info (max 30 chars)\n");
  PRINTF1("                      (or max 28 chars if using the \"track\" option)\n");
  PRINTF1("     --tn \"track\"     track number of the song on the CD (1 to 99)\n");
  PRINTF1("                      (using this option will add an ID3v1.1 tag)\n");
  PRINTF1("     --tg \"genre\"     genre of song (name or number)\n");
  PRINTF1("\n");
#ifdef HAVEGTK
  PRINTF1("    -g              run graphical analysis on <infile>\n");
#endif
  DISPLAY_BITRATES1();
  LAME_NORMAL_EXIT();
}



/************************************************************************
*
* usage
*
* PURPOSE:  Writes presetting info to #stdout#
*
************************************************************************/

void lame_presets_info(lame_global_flags *gfp,char *name)  /* print syntax & exit */
{
  LAME_PRINT_VERSION1();
  PRINTF1("\n");
  PRINTF1("Presets are some shortcuts for common settings.\n");
  PRINTF1("They can be combined with -v if you want VBR MP3s.\n");
  PRINTF1("\n");
  PRINTF1("                 phone   sw     am    fm  voice radio  tape  hifi   cd studio\n");
  PRINTF1("=============================================================================\n");
  PRINTF1("--resample        8.0  11.025 16.0  22.05 32.0                               \n");
  PRINTF1("--lowpass         3.2   4.800  7.2   9.95 12.3  15.0  18.5  20.24            \n");
  PRINTF1("--lowpass-width   1.0   0.500  0.5   0.88  2.0   0.0   2.0   2.20            \n");
  PRINTF1("--noshort         yes                      yes                               \n");
  PRINTF1("-h                                                           yes   yes   yes \n");
  PRINTF1("-m                  m     m      m     j     m     j     j     j     s     s \n");
  PRINTF1("-b                 16    24     32    64    56   112   128   160   192   256 \n");
  PRINTF1("-- PLUS WITH -v -------------------------------------------------------------\n");
  PRINTF1("-V                  6     5      5     5     4     4     4     3     2     0 \n");
  PRINTF1("-b                  8     8     16    24    32    64    96   112   128   160 \n");
  PRINTF1("-B                 56    64    128   160   128   256   320   320   320   320 \n");
  PRINTF1("\n");
  PRINTF1("EXAMPLES:\n");
  PRINTF1(" a) --preset fm\n");
  PRINTF1("    equals: --resample 22.05 --lowpass 9.95 --lowpass-width 0.88 -mj -b 64\n");
  PRINTF1(" b) -v --preset studio\n");
  PRINTF1("    equals: -h -m s -V 0 -b 160 -B 320\n");
  PRINTF1("\n");

  LAME_NORMAL_EXIT();
}



/************************************************************************
*
* parse_args
*
* PURPOSE:  Sets encoding parameters to the specifications of the
* command line.  Default settings are used for parameters
* not specified in the command line.
*
* If the input file is in WAVE or AIFF format, the sampling frequency is read
* from the AIFF header.
*
* The input and output filenames are read into #inpath# and #outpath#.
*
************************************************************************/
void lame_parse_args(lame_global_flags *gfp,int argc, char **argv)
{
  FLOAT srate;
  int   err = 0, i = 0;
  int autoconvert=0;
  int user_quality=0;
  char *programName = argv[0]; 
  int track = 0;

  gfp->inPath[0] = '\0';   
  gfp->outPath[0] = '\0';
  /* turn on display options. user settings may turn them off below */
  gfp->silent=0;
  gfp->brhist_disp = 1;
  id3_inittag(&gfp->id3tag);

  /* process args */
  while(++i<argc && err == 0) {
    char c, *token, *arg, *nextArg;
    int  argUsed;
    
    token = argv[i];
    if(*token++ == '-') {
      if(i+1 < argc) nextArg = argv[i+1];
      else           nextArg = "";
      argUsed = 0;
      if (! *token) {
	/* The user wants to use stdin and/or stdout. */
	if(gfp->inPath[0] == '\0')       strncpy(gfp->inPath, argv[i],MAX_NAME_SIZE);
	else if(gfp->outPath[0] == '\0') strncpy(gfp->outPath, argv[i],MAX_NAME_SIZE);
      } 
      if (*token == '-') {
	/* GNU style */
	token++;

	if (strcmp(token, "resample")==0) {
	  argUsed=1;
	  srate = atof( nextArg );
	  /* samplerate = rint( 1000.0 * srate ); $A  */
	  gfp->out_samplerate =  (( 1000.0 * srate ) + 0.5);
	  if (srate  < 1) {
	    ERRORF("Must specify a samplerate with --resample\n");
	    LAME_ERROR_EXIT();
	  }
	}
	else if (strcmp(token, "vbr-old")==0) {
	  gfp->VBR = vbr_rh; 
	  gfp->quality = 2;
	}
	else if (strcmp(token, "vbr-new")==0) {
	  gfp->VBR = vbr_mt; 
	  gfp->quality = 2;
	}
	else if (strcmp(token, "abr")==0) {
	  argUsed=1;
	  gfp->VBR = vbr_abr; 
	  gfp->VBR_mean_bitrate_kbps = atoi(nextArg);
	  gfp->VBR_mean_bitrate_kbps = Min(gfp->VBR_mean_bitrate_kbps,310); 
	  gfp->VBR_mean_bitrate_kbps = Max(gfp->VBR_mean_bitrate_kbps,4); 
	}
	else if (strcmp(token, "mp3input")==0) {
	  gfp->input_format=sf_mp3;
	}
	else if (strcmp(token, "ogginput")==0) {
#ifdef HAVEVORBIS
	  gfp->input_format=sf_ogg;
#else
	  ERRORF("Error: LAME not compiled with Vorbis support\n");
	  LAME_ERROR_EXIT();
#endif
	}
	else if (strcmp(token, "ogg")==0) {
#ifdef HAVEVORBIS
	  gfp->ogg=1;
#else
	  ERRORF("Error: LAME not compiled with Vorbis support\n");
	  LAME_ERROR_EXIT();
#endif

	}
	else if (strcmp(token, "voice")==0) {
	  gfp->lowpassfreq=12000;
	  gfp->VBR_max_bitrate_kbps=160;
	  gfp->no_short_blocks=1;
	}
	else if (strcmp(token, "noshort")==0) {
	  gfp->no_short_blocks=1;
	}
	else if (strcmp(token, "decode")==0) {
	  gfp->decode_only=1;
	}
	else if (strcmp(token, "noath")==0) {
	  gfp->noATH=1;
	}
	else if (strcmp(token, "nores")==0) {
	  gfp->disable_reservoir=1;
	  gfp->padding_type=0;
	}
	else if (strcmp(token, "strictly-enforce-ISO")==0) {
	  gfp->strict_ISO=1;
	}
	else if (strcmp(token, "athonly")==0) {
	  gfp->ATHonly=1;
	}
	else if (strcmp(token, "freeformat")==0) {
	  gfp->free_format=1;
	}
	else if (strcmp(token, "athshort")==0) {
	  gfp->ATHshort=1;
	}
	else if (strcmp(token, "nohist")==0) {
	  gfp->brhist_disp = 0;
	}
	/* options for ID3 tag */
 	else if (strcmp(token, "tt")==0) {
 		gfp->id3tag_used=1;      argUsed = 1;
  		strncpy(gfp->id3tag.title, nextArg, 30);
 		}
 	else if (strcmp(token, "ta")==0) {
 		gfp->id3tag_used=1; argUsed = 1;
  		strncpy(gfp->id3tag.artist, nextArg, 30);
 		}
 	else if (strcmp(token, "tl")==0) {
 		gfp->id3tag_used=1; argUsed = 1;
  		strncpy(gfp->id3tag.album, nextArg, 30);
 		}
 	else if (strcmp(token, "ty")==0) {
 		gfp->id3tag_used=1; argUsed = 1;
  		strncpy(gfp->id3tag.year, nextArg, 4);
 		}
 	else if (strcmp(token, "tc")==0) {
 		gfp->id3tag_used=1; argUsed = 1;
  		strncpy(gfp->id3tag.comment, nextArg, 30);
 		}
 	else if (strcmp(token, "tn")==0) {
 		gfp->id3tag_used=1; argUsed = 1;
  		track = atoi(nextArg);
  		if (track < 1) { track = 1; }
  		if (track > 99) { track = 99; }
  		gfp->id3tag.track = track;
 		}
 	else if (strcmp(token, "tg")==0) {
		argUsed = strtol (nextArg, &token, 10);
		if (nextArg==token) {
		  /* Genere was given as a string, so it's number*/
		  for (argUsed=0; argUsed<=genre_last; argUsed++) {
		    if (!strcmp (genre_list[argUsed], nextArg)) { break; }
		  }
 		}
		if (argUsed>genre_last) { 
		  argUsed=255; 
		  ERRORF("Unknown genre: %s.  Specifiy genre number \n", nextArg);
		}
	        argUsed &= 255; c=(char)(argUsed);

 		gfp->id3tag_used=1; argUsed = 1;
  		strncpy(gfp->id3tag.genre, &c, 1);
	       }
	else if (strcmp(token, "lowpass")==0) {
	  argUsed=1;
	  gfp->lowpassfreq =  (( 1000.0 * atof( nextArg ) ) + 0.5);
	  if (gfp->lowpassfreq  < 1) {
	    ERRORF("Must specify lowpass with --lowpass freq, freq >= 0.001 kHz\n");
	    LAME_ERROR_EXIT();
	  }
	}
	else if (strcmp(token, "lowpass-width")==0) {
	  argUsed=1;
	  gfp->lowpasswidth =  (( 1000.0 * atof( nextArg ) ) + 0.5);
	  if (gfp->lowpasswidth  < 0) {