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small cleanup of -db documentation

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F. Duncanh
2023-12-31 07:40:52 -05:00
parent 26d35dfd6a
commit 682baa03c6
4 changed files with 33 additions and 32 deletions
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27
README.html
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@@ -518,11 +518,12 @@ before a pause or track-change initiated on the client takes effect on
the audio played by the server.</li>
</ul>
<p>AirPlay volume-control attenuates volume (gain) by up to -30dB: the
range -30dB:0dB can be rescaled from <em>Low</em>:0 (<em>Low</em> &lt;
0), or <em>Low</em>:<em>High</em>, using the option
“<code>-db _Low_</code>” or “<code>-db _Low_:_High_</code>” (Rescaling
is linear in decibels). The option <code>-taper</code> provides a
“tapered” AirPlay volume-control profile some users may prefer.</p>
range -30dB:0dB can be rescaled from <em>Low</em>:0, or
<em>Low</em>:<em>High</em>, using the option <code>-db</code> (“-db
<em>Low</em>” or “-db <em>Low</em>:<em>High</em>”), <em>Low</em> must be
negative. Rescaling is linear in decibels. The option
<code>-taper</code> provides a “tapered” AirPlay volume-control profile
some users may prefer.</p>
<p>The -vsync and -async options also allow an optional positive (or
negative) audio-delay adjustment in <em>milliseconds</em> for
fine-tuning : <code>-vsync 20.5</code> delays audio relative to video by
@@ -1518,14 +1519,14 @@ an AppleTV6,2 with sourceVersion 380.20.1 (an AppleTV 4K 1st gen,
introduced 2017, running tvOS 12.2.1), so it does not seem to matter
what version UxPlay claims to be.</p>
<h1 id="changelog">Changelog</h1>
<p>1.68 2023-12-29 Introduced a simpler (default) method for generating
a persistent public key from the server MAC address (which can now be
set with the -m option). (The previous pem-file method is still
available with -key option). New option -reg to maintain a register of
pin-authenticated clients. Corrected volume-control: now inteprets
AirPlay volume range -30dB:0dB as (gain/amplitude) decibel attenuation,
with new option -db low[:high] for “flat” rescaling of the dB range. Add
-taper option for a “tapered” AirPlay volume-control profile.</p>
<p>1.68 2023-12-31 New simpler (default) method for generating a
persistent public key from the server MAC address (which can now be set
with the -m option). (The previous method is still available with -key
option). New option -reg to maintain a register of pin-authenticated
clients. Corrected volume-control: now interprets AirPlay volume range
-30dB:0dB as decibel gain attenuation, with new option -db low[:high]
for “flat” rescaling of the dB range. Add -taper option for a “tapered”
AirPlay volume-control profile.</p>
<p>1.67 2023-11-30 Add support for Apple-style one-time pin
authentication of clients with option “-pin”: (uses SRP6a authentication
protocol and public key persistence). Detection with error message of

10
README.md
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@@ -415,8 +415,8 @@ if you want to follow the Apple Music lyrics on the client while listening to su
delays the video on the client to match audio on the server, so leads to
a slight delay before a pause or track-change initiated on the client takes effect on the audio played by the server.
AirPlay volume-control attenuates volume (gain) by up to -30dB: the range -30dB:0dB can be rescaled from _Low_:0 (_Low_ < 0), or _Low_:_High_, using the
option "`-db _Low_`" or "``-db _Low_:_High_``" (Rescaling is linear in decibels). The option ```-taper``` provides a "tapered" AirPlay volume-control
AirPlay volume-control attenuates volume (gain) by up to -30dB: the range -30dB:0dB can be rescaled from _Low_:0, or _Low_:_High_, using the
option `-db` ("-db _Low_ " or "-db _Low_:_High_ "), _Low_ must be negative. Rescaling is linear in decibels. The option ```-taper``` provides a "tapered" AirPlay volume-control
profile some users may prefer.
The -vsync and -async options
@@ -1194,10 +1194,10 @@ tvOS 12.2.1), so it does not seem to matter what version UxPlay claims to be.
# Changelog
1.68 2023-12-29 Introduced a simpler (default) method for generating a persistent public key from the server MAC
address (which can now be set with the -m option). (The previous pem-file method is still available
1.68 2023-12-31 New simpler (default) method for generating a persistent public key from the server MAC
address (which can now be set with the -m option). (The previous method is still available
with -key option). New option -reg to maintain a register of pin-authenticated clients. Corrected
volume-control: now inteprets AirPlay volume range -30dB:0dB as (gain/amplitude) decibel attenuation,
volume-control: now interprets AirPlay volume range -30dB:0dB as decibel gain attenuation,
with new option -db low[:high] for "flat" rescaling of the dB range. Add -taper option for a "tapered"
AirPlay volume-control profile.

24
README.txt
View File

@@ -511,10 +511,10 @@ helped to prevent this previously when timestamps were not being used.)
takes effect on the audio played by the server.
AirPlay volume-control attenuates volume (gain) by up to -30dB: the
range -30dB:0dB can be rescaled from *Low*:0 (*Low* \< 0), or
*Low*:*High*, using the option "`-db _Low_`" or "`-db _Low_:_High_`"
(Rescaling is linear in decibels). The option `-taper` provides a
"tapered" AirPlay volume-control profile some users may prefer.
range -30dB:0dB can be rescaled from *Low*:0, or *Low*:*High*, using the
option `-db` ("-db *Low*" or "-db *Low*:*High*"), *Low* must be
negative. Rescaling is linear in decibels. The option `-taper` provides
a "tapered" AirPlay volume-control profile some users may prefer.
The -vsync and -async options also allow an optional positive (or
negative) audio-delay adjustment in *milliseconds* for fine-tuning :
@@ -1556,14 +1556,14 @@ what version UxPlay claims to be.
# Changelog
1.68 2023-12-29 Introduced a simpler (default) method for generating a
persistent public key from the server MAC address (which can now be set
with the -m option). (The previous pem-file method is still available
with -key option). New option -reg to maintain a register of
pin-authenticated clients. Corrected volume-control: now inteprets
AirPlay volume range -30dB:0dB as (gain/amplitude) decibel attenuation,
with new option -db low\[:high\] for "flat" rescaling of the dB range.
Add -taper option for a "tapered" AirPlay volume-control profile.
1.68 2023-12-31 New simpler (default) method for generating a persistent
public key from the server MAC address (which can now be set with the -m
option). (The previous method is still available with -key option). New
option -reg to maintain a register of pin-authenticated clients.
Corrected volume-control: now interprets AirPlay volume range -30dB:0dB
as decibel gain attenuation, with new option -db low\[:high\] for "flat"
rescaling of the dB range. Add -taper option for a "tapered" AirPlay
volume-control profile.
1.67 2023-11-30 Add support for Apple-style one-time pin authentication
of clients with option "-pin": (uses SRP6a authentication protocol and

4
uxplay.cpp
View File

@@ -1044,7 +1044,7 @@ static void parse_arguments (int argc, char *argv[]) {
continue;
}
}
fprintf(stderr, "invalid argument -al %s: must be a decimal time offset in seconds, range [0,10]\n"
fprintf(stderr, "invalid -al %s: value must be a decimal time offset in seconds, range [0,10]\n"
"(like 5 or 4.8, which will be converted to a whole number of microseconds)\n", argv[i]);
exit(1);
} else if (arg == "-pin") {
@@ -1118,7 +1118,7 @@ static void parse_arguments (int argc, char *argv[]) {
}
}
if (db_bad) {
fprintf(stderr, "%s %s requires argument \"low\" or \"low:high\" where low < 0 and high > low are decibel gain values\n", argv[i], start);
fprintf(stderr, "invalid %s %s: db value must be \"low\" or \"low:high\", low < 0 and high > low are decibel gains\n", argv[i], start);
exit(1);
}
i++;