Bitstreamout-plugin

Beschreibung

Autor: Werner Fink

Dieses Plugin empfängt den mit 16 bit kodierten Audio-Stream einer DVB-Karte und sendet ihn über den PCI-Bus an den S/PDIF-Ausgang einer vom ALSA-Treiber unterstützen Soundkarte.

Bilder

Einstellungen

Hardwareanforderungen

• Eine von ALSA unterstütze Soundkarte

Softwareanforderungen

• ALSA
• libmad

Installation

Source

cd $SOURCEDIR
tar xvzf libmad-<VERSION>.tar.gz
cd libmad-<VERSION>
./configure --prefix=/usr/local
make
make install
ldconfig

Arch-Linux

pacman -S libmad

Crux

prt-get depinst libmad

Debian

apt-get install libmad0-dev

Gentoo

emerge libmad

SuSE

yast -i mad-devel

Konfiguration

Parameter

Parameter (kurz)	Parameter (lang)	Beschreibung
-o	--onoff	Hauptmenueintrag anschalten
-m <DATEI>	--mute=<DATEI>	Script zum an-/abschalten des S/PDIF-Interface

Versions-Historie

Version	Datum	Beschreibung	Link
0.89c	13.05.2008	Make it build even with make plugins	[1]
0.89b	17.04.2008	Support only VDR 1.6.0 and higher Scan always mpeg audio header in mad_frame_decode() as we work around the buffer guard internal of mad_header_decode() Do not delay first resulting PCM frame of mad_frame_decode()	[2]
0.85	14.03.2006	Various cleanups and bug fixes Try to get Mpeg Audio more lip sync	[3]
0.84	23.06.2005	Add recording check to avoid to run into Add/DelPid trouble Use switching thread even for VDR 1.3.21+ The ORF sample provided by a user has a large delay gap therefore do not timeout after 3 seconds.	[4]
0.83a	12.04.2005	kleines Bugfix-Release, damit sollte muten nun ohne Verlust des AC3 Kanals möglich sein	[5]
0.83	01.04.2005	Add bug fix from Marcel Wiesweg in byte handle class Add thread locking class based on cThreadLock to get a non interrupted S/P-DIF forwarding in case of starting and handling low state of the HW buffer of the sound card. Drop workaround on VDR Add/DelPid bug for ptOther and the handling on `Device or resource busy' because it breaks replay part of the plugin. Start the live forwarding thread by attaching the receiver, requires a new logic to wait on the data stream and its type. Make MP2 Audio more synchron Be sure to store the correct name for PCMinitial Do not flood the syslog with mp2 messages if burst size is less than for layer II/III.	[6]
0.81	18.03.2005
0.80	15.03.2005	Add nonlinear mp2 loop through S/P-DIF similar to AC3/DTS Use a frame based mp2 parser for libmad with buffer gard Make PCM initial wait frames configurable Remove Z680 option Remove MP2offset Add a workaround for broken sub audio header in PS1 payloads Be smarter in AV synchronization, wait on stable STC value Make xlist find plain AC3 in PS1 payload even from ORF	[7]
0.70	20.02.2005		[8]
0.61f	26.10.2004	für alle bitstreamout user, die oft Synchronisationsprobleme mit dem ZDF haben, eine neue Version.	[9]
0.61	03.06.2004
0.50e	29.04.2004	Simply continue to get next pcm frame if PTS != STC Compare system clock delay with STC delay and only if both clocks are in sync we assume that STC is stable Switch back to frame repeat instead of sample repeat even for real audio. Try to solve delay detection to get the min start delay Don't repeat frames but stereo samples in case of audio Fix boolean cut&paste error in shm_malloc() Lock threads in Live Receiver and also in S/P-DIF forwarding thread.	[[10]]
0.50b	26.03.2004	Use always cDevice::CurrentChannel() in ChannelSwitch() to be sure to get always the live channel on the primary card. Be sure that we do not get a SIGSEGV if terminated Add a further delay value for LiveTV Try out some DTS sanity checks Add some kernel version magic to shm_memory_tool	[11]
0.50a	09.01.2004
0.50	09.01.2004		[12]
0.49	20.12.2003		[13]
...	...

Links

1. ALSA Soundkarten Treiber
2. MAD (M)PEG (A)udio (D)ecoder Homepage
3. Homepage des Plugins
4. AC3 mit bitstreamout HOWTO und AC3overDVB Infos