Updated --help output and documentation

Author: chrisn

README.md

@@ -291,9 +291,9 @@ Disable status messages.
 #### `--input-filename`, `-i <filename>`
 
 Input filename, which should be a MP3, WAV, FLAC, Ogg Vorbis, or Opus audio file, or a
-binary waveform data file. By default, audiowaveform uses the file
+binary or JSON format waveform data file. By default, audiowaveform uses the file
 extension to decide how to read the input file (either .mp3, .wav, .flac, .ogg,
-.oga, .opus, or .dat, as appropriate), but this can be overridden by the
+.oga, .opus, .dat, or .json as appropriate), but this can be overridden by the
 `--input-format` option. If the `--input-filename` option is `-` or
 is omitted, audiowaveform reads from standard input, and the
 `--input-format` option must be used to specify the data format.
@@ -313,7 +313,7 @@ by the `--output-format` option. If the `--output-filename` option is
 
 #### `--input-format <format>`
 
-Input data format, either `wav`, `mp3`, `flac`, `ogg`, `opus`, or `dat`.
+Input data format, either `wav`, `mp3`, `flac`, `ogg`, `opus`, `dat`, or `json`.
 This option must be used when reading from standard input. It may also be used to set
 the input file format, instead of it being determined from the file extension
 from the `--input-filename` option.

doc/audiowaveform.1

@@ -1,4 +1,4 @@
-.TH audiowaveform 1 "9 August 2023"
+.TH audiowaveform 1 "30 September 2023"
 
 .SH NAME
 
@@ -56,12 +56,12 @@ Disable status messages.
 .TP
 .B --input-filename\fR, \fB-i\fR <filename>
 Input filename, which should be a MP3, WAV, FLAC, Ogg Vorbis, or Opus audio file,
-or a binary waveform data file. By default, \fBaudiowaveform\fR uses the file
-extension to decide how to read the input file (either .mp3, .wav, .flac, .ogg,
-\&.oga, .opus, or .dat, as appropriate), but this can be overridden by the
-\fB--input-format\fR option. If the \fB--input-filename\fR option is \fB-\fR or
-is omitted, \fBaudiowaveform\fR reads from standard input, and the
-\fB--input-format\fR option must be used to specify the data format.
+or a binary or JSON format waveform data file. By default, \fBaudiowaveform\fR
+uses the file extension to decide how to read the input file (either .mp3, .wav,
+\&.flac, .ogg, .oga, .opus, .dat, or .json as appropriate), but this can be
+overridden by the \fB--input-format\fR option. If the \fB--input-filename\fR
+option is \fB-\fR or is omitted, \fBaudiowaveform\fR reads from standard input,
+and the \fB--input-format\fR option must be used to specify the data format.
 
 Note that Opus support requires libsndfile 1.0.29 or later, so may not be
 available on all systems.
@@ -79,9 +79,10 @@ by the \fB--output-format\fR option. If the \fB--output-filename\fR option is
 .TP
 .B --input-format\fR <format>
 Input data format, either \fBwav\fR, \fBmp3\fR, \fBflac\fR, \fBogg\fR,
-\fBopus\fR, or \fBdat\fR. This option must be used when reading from standard
-input. It may also be used to set the input file format, instead of it being
-determined from the file extension from the \fB--input-filename\fR option.
+\fBopus\fR, \fBdat\fR, or \fBjson\fR. This option must be used when reading
+from standard input. It may also be used to set the input file format, instead
+of it being determined from the file extension from the \fB--input-filename\fR
+option.
 
 .TP
 .B --output-format\fR <format>

src/Options.cpp

@@ -126,8 +126,8 @@ bool Options::parseCommandLine(int argc, const char* const* argv)
         "input-filename,i",
         po::value<std::string>(&input_filename_),
         FileFormat::isSupported(FileFormat::Opus) ?
-            "input file name (.mp3, .wav, .flac, .ogg, .oga, .opus, .dat)" :
-            "input file name (.mp3, .wav, .flac, .ogg, .oga, .dat)"
+            "input file name (.mp3, .wav, .flac, .ogg, .oga, .opus, .dat, .json)" :
+            "input file name (.mp3, .wav, .flac, .ogg, .oga, .dat, .json)"
     )(
         "output-filename,o",
         po::value<std::string>(&output_filename_),
@@ -139,8 +139,8 @@ bool Options::parseCommandLine(int argc, const char* const* argv)
         "input-format",
         po::value<std::string>(&input_format_),
         FileFormat::isSupported(FileFormat::Opus) ?
-            "input file format (mp3, wav, flac, ogg, opus, dat)" :
-            "input file format (mp3, wav, flac, ogg, dat)"
+            "input file format (mp3, wav, flac, ogg, opus, dat, json)" :
+            "input file format (mp3, wav, flac, ogg, dat, json)"
     )(
         "output-format",
         po::value<std::string>(&output_format_),