with a symmetric RC4 session key. For each user of paraslash you must
create a public/secret RSA key pair for authentication.
+If para_client is started without non-option arguments, an interactive
+session (shell) is started. Command history and command completion are
+supported through libreadline.
*para_audiod*
The client program which talks to para_audiod. Used to control
para_audiod, to receive status info, or to grab the stream at any
-point of the decoding process.
+point of the decoding process. Like para_client, para_audioc supports
+interactive sessions on systems with libreadline.
*para_recv*
distro, but you might have to install the development package
(libssl-dev or libgcrypt-dev on debian systems) as well.
+ - XREFERENCE(ftp://ftp.gnu.org/pub/gnu/gengetopt/, gengetopt)
+ is needed to generate the C code for the command line parsers
+ of all paraslash executables.
+
- XREFERENCE(ftp://ftp.gnu.org/pub/gnu/help2man, help2man)
is used to create the man pages.
- XREFERENCE(http://www.speex.org/, speex). In order to stream
or decode speex files, libspeex (libspeex-dev) is required.
+ - XREFERENCE(http://flac.sourceforge.net/, flac). To stream
+ or decode files encoded with the _Free Lossless Audio Codec_,
+ libFLAC (libFLAC-dev) must be installed.
+
- XREFERENCE(ftp://ftp.alsa-project.org/pub/lib/, alsa-lib). On
Linux, you'll need to have ALSA's development package
libasound2-dev installed.
libao). Needed to build the ao writer (ESD, PulseAudio,...).
Debian package: libao-dev.
+ - XREFERENCE(http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html,
+ GNU Readline). If this library (libreadline-dev) is installed,
+ para_client and para_audioc support interactive sessions.
+
Installation
~~~~~~~~~~~~
files. Also, it's fine to use para_server on a box without sound card.
Next, install the paraslash package on all machines, you'd like this
-software to run on:
+software to run on. If you compile from a released tarball, execute
(./configure && make) > /dev/null
+When compiling from git or from snapshots downloaded via gitweb,
+the above command will not work because the configure script is not
+included in the git repository. In this case the following command
+should be used instead:
+
+ ./autogen.sh
+
+This runs autoconf to generate the configure script, then runs it as
+above. Therefore you'll need autoconf for this to work.
+
There should be no errors but probably some warnings about missing
packages which usually implies that not all audio formats will be
supported. If headers or libs are installed at unusual locations you
called the public key and the private key. A message can be encrypted
with either key and only the counterpart of that key can decrypt
the message. While RSA can be used for both signing and encrypting
-a message, paraslash only uses RSA only for the latter purpose. The
+a message, paraslash uses RSA only for the latter purpose. The
RSA public key encryption and signatures algorithms are defined in
detail in RFC 2437.
is composed of superframes, each containing one or more frames of
2048 samples. For 16 bit stereo a WMA superframe is about 8K large.
+*FLAC*
+
+The Free Lossless Audio Codec (FLAC) compresses audio without quality
+loss. It gives better compression ratios than a general purpose
+compressor like zip or bzip2 because FLAC is designed specifically
+for audio. A FLAC-encoded file consits of frames of varying size, up
+to 16K. Each frame starts with a header that contains all information
+necessary to decode the frame.
+
Meta data
~~~~~~~~~
32 characters long. ID3, version 2 is much more flexible but requires
a separate library being installed for paraslash to support it.
-Ogg vorbis files contain meta data as Vorbis comments, which are
-typically implemented as strings of the form "[TAG]=[VALUE]". Unlike
-ID3 version 1 tags, one may use whichever tags are appropriate for
-the content.
+Ogg vorbis, ogg speex and flac files contain meta data as Vorbis
+comments, which are typically implemented as strings of the form
+"[TAG]=[VALUE]". Unlike ID3 version 1 tags, one may use whichever
+tags are appropriate for the content.
AAC files usually use the MPEG-4 container format for storing meta
data while WMA files wrap meta data as special objects within the
of an audio file. For MP3 files, a chunk is the same as an MP3 frame,
while for OGG files a chunk is an OGG page, etc. Therefore the chunk
size varies considerably between audio formats, from a few hundred
-bytes (MP3) up to 8K (WMA).
+bytes (MP3) up to 16K (FLAC).
The chunk table contains the offsets within the audio file that
correspond to the chunk boundaries of the file. Like the meta data,
paraslash development. It is necessary for cloning the git repository
and for getting updates.
-ftp://ftp.gnu.org/pub/gnu/gengetopt/ (gengetopt). The C code for
-the command line parsers of all paraslash executables is generated
-by gengetopt. The generated C files are shipped in the tarballs but
-are not contained in the git repository.
-
ftp://ftp.gnu.org/pub/gnu/m4/ (m4). Some input files for gengetopt
are generated from templates by the m4 macro processor.
projects / paraslash.git / blobdiff