- int i, LastArg, NextArg;
-
- /* at least one argument should be present */
- if (argc<2)
- {
- printf("\n%s, %s\n",Version,Author);
- printf("Usage: mpeg2decode {options}\n"
-"Options: -b file main bitstream (base or spatial enhancement layer)\n"
-" -cn file conformance report (n: level)\n"
-" -e file enhancement layer bitstream (SNR or Data Partitioning)\n"
-" -f store/display interlaced video in frame format\n"
-" -g concatenated file format for substitution method (-x)\n"
-" -in file information & statistics report (n: level)\n"
-" -l file file name pattern for lower layer sequence\n");
-printf(" (for spatial scalability)\n"
-" -on file output format (0:YUV 1:SIF 2:TGA 3:PPM 4:X11 5:X11HiQ)\n"
-" -q disable warnings to stderr\n"
-" -r use double precision reference IDCT\n"
-" -t enable low level tracing to stdout\n"
-" -u file print user_data to stdio or file\n"
-" -vn verbose output (n: level)\n"
-" -x file filename pattern of picture substitution sequence\n\n");
-printf("File patterns: for sequential filenames, \"printf\" style, e.g. rec%%d\n"
-" or rec%%d%%c for fieldwise storage\n"
-"Levels: 0:none 1:sequence 2:picture 3:slice 4:macroblock 5:block\n\n"
-"Example: mpeg2decode -b bitstream.mpg -f -r -o0 rec%%d\n"
-" \n");
- exit(0);
- }
-
-
- Output_Type = -1;
- i = 1;
-
- /* command-line options are proceeded by '-' */
-
- while(i < argc)
- {
- /* check if this is the last argument */
- LastArg = ((argc-i)==1);
-
- /* parse ahead to see if another flag immediately follows current
- argument (this is used to tell if a filename is missing) */
- if(!LastArg)
- NextArg = (argv[i+1][0]=='-');
- else
- NextArg = 0;
-
- /* second character, [1], after '-' is the switch */
- if(argv[i][0]=='-')
- {
- switch(toupper(argv[i][1]))
- {
- /* third character. [2], is the value */
- case 'B':
- Main_Bitstream_Flag = 1;
-
- if(NextArg || LastArg)
- {
- printf("ERROR: -b must be followed the main bitstream filename\n");
- }
- else
- Main_Bitstream_Filename = argv[++i];
-
- break;
-
-
- case 'C':
-
-#ifdef VERIFY
- Verify_Flag = atoi(&argv[i][2]);
-
- if((Verify_Flag < NO_LAYER) || (Verify_Flag > ALL_LAYERS))
- {
- printf("ERROR: -c level (%d) out of range [%d,%d]\n",
- Verify_Flag, NO_LAYER, ALL_LAYERS);
- exit(ERROR);
- }
-#else /* VERIFY */
- printf("This program not compiled for Verify_Flag option\n");
-#endif /* VERIFY */
- break;
-
- case 'E':
- Two_Streams = 1; /* either Data Partitioning (DP) or SNR Scalability enhancment */
-
- if(NextArg || LastArg)
- {
- printf("ERROR: -e must be followed by filename\n");
- exit(ERROR);
- }
- else
- Enhancement_Layer_Bitstream_Filename = argv[++i];
-
- break;
-
-
- case 'F':
- Frame_Store_Flag = 1;
- break;
-
- case 'G':
- Big_Picture_Flag = 1;
- break;
-
-
- case 'I':
-#ifdef VERIFY
- Stats_Flag = atoi(&argv[i][2]);
-#else /* VERIFY */
- printf("WARNING: This program not compiled for -i option\n");
-#endif /* VERIFY */
- break;
-
- case 'L': /* spatial scalability flag */
- Spatial_Flag = 1;
-
- if(NextArg || LastArg)
- {
- printf("ERROR: -l must be followed by filename\n");
- exit(ERROR);
- }
- else
- Lower_Layer_Picture_Filename = argv[++i];
-
- break;
-
- case 'O':
-
- Output_Type = atoi(&argv[i][2]);
-
- if((Output_Type==4) || (Output_Type==5))
- Output_Picture_Filename = ""; /* no need of filename */
- else if(NextArg || LastArg)
- {
- printf("ERROR: -o must be followed by filename\n");
- exit(ERROR);
- }
- else
- /* filename is separated by space, so it becomes the next argument */
- Output_Picture_Filename = argv[++i];
-
-#ifdef DISPLAY
- if (Output_Type==T_X11HIQ)
- {
- hiQdither = 1;
- Output_Type=T_X11;
- }
-#endif /* DISPLAY */
- break;
-
- case 'Q':
- Quiet_Flag = 1;
- break;
-
- case 'R':
- Reference_IDCT_Flag = 1;
- break;
-
- case 'T':
-#ifdef TRACE
- Trace_Flag = 1;
-#else /* TRACE */
- printf("WARNING: This program not compiled for -t option\n");
-#endif /* TRACE */
- break;
-
- case 'U':
- User_Data_Flag = 1;
-
- case 'V':
-#ifdef VERBOSE
- Verbose_Flag = atoi(&argv[i][2]);
-#else /* VERBOSE */
- printf("This program not compiled for -v option\n");
-#endif /* VERBOSE */
- break;
-
-
- case 'X':
- Ersatz_Flag = 1;
-
- if(NextArg || LastArg)
- {
- printf("ERROR: -x must be followed by filename\n");
- exit(ERROR);
- }
- else
- Substitute_Picture_Filename = argv[++i];
-
- break;
-
-
-
- default:
- fprintf(stderr,"undefined option -%c ignored. Exiting program\n",
- argv[i][1]);
-
- exit(ERROR);
-
- } /* switch() */
- } /* if argv[i][0] == '-' */
-
- i++;
-
- /* check for bitstream filename argument (there must always be one, at the very end
- of the command line arguments */
-
- } /* while() */
-
-
- /* options sense checking */
-
- if(Main_Bitstream_Flag!=1)
- {
- printf("There must be a main bitstream specified (-b filename)\n");
- }
-
- /* force display process to show frame pictures */
- if((Output_Type==4 || Output_Type==5) && Frame_Store_Flag)
- Display_Progressive_Flag = 1;
- else
- Display_Progressive_Flag = 0;
-
-#ifdef VERIFY
- /* parse the bitstream, do not actually decode it completely */
-
-