Those ioctls were added back in 2009, at changeset 1cb662a3144 but were never documented. Fortunately, the original commit is good enough to serve as the basis for documenting it. Also, the support for it is done by dmxdev implementation. So, add a proper documentation for it, based on the description of the original changeset. Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx> --- Documentation/DocBook/media/dvb/demux.xml | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/Documentation/DocBook/media/dvb/demux.xml b/Documentation/DocBook/media/dvb/demux.xml index 86de89cfbd67..c8683d66f059 100644 --- a/Documentation/DocBook/media/dvb/demux.xml +++ b/Documentation/DocBook/media/dvb/demux.xml @@ -1042,7 +1042,14 @@ role="subsection"><title>DMX_ADD_PID</title> </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>This ioctl is undocumented. Documentation is welcome.</para> +<para>This ioctl call allows to add multiple PIDs to a transport stream filter +previously set up with DMX_SET_PES_FILTER and output equal to DMX_OUT_TSDEMUX_TAP. +</para></entry></row><row><entry align="char"><para> +It is used by readers of /dev/dvb/adapterX/demuxY. +</para></entry></row><row><entry align="char"><para> +It may be called at any time, i.e. before or after the first filter on the +shared file descriptor was started. It makes it possible to record multiple +services without the need to de-multiplex or re-multiplex TS packets.</para> </entry> </row></tbody></tgroup></informaltable> <para>SYNOPSIS @@ -1075,7 +1082,7 @@ role="subsection"><title>DMX_ADD_PID</title> </para> </entry><entry align="char"> -<para>Undocumented.</para> +<para>PID number to be filtered.</para> </entry> </row></tbody></tgroup></informaltable> &return-value-dvb; @@ -1087,7 +1094,15 @@ role="subsection"><title>DMX_REMOVE_PID</title> </para> <informaltable><tgroup cols="1"><tbody><row><entry align="char"> -<para>This ioctl is undocumented. Documentation is welcome.</para> +<para>This ioctl call allows to remove a PID when multiple PIDs are set on a +transport stream filter, e. g. a filter previously set up with output equal to +DMX_OUT_TSDEMUX_TAP, created via either DMX_SET_PES_FILTER or DMX_ADD_PID. +</para></entry></row><row><entry align="char"><para> +It is used by readers of /dev/dvb/adapterX/demuxY. +</para></entry></row><row><entry align="char"><para> +It may be called at any time, i.e. before or after the first filter on the +shared file descriptor was started. It makes it possible to record multiple +services without the need to de-multiplex or re-multiplex TS packets.</para> </entry> </row></tbody></tgroup></informaltable> <para>SYNOPSIS @@ -1120,7 +1135,7 @@ role="subsection"><title>DMX_REMOVE_PID</title> </para> </entry><entry align="char"> -<para>Undocumented.</para> +<para>PID of the PES filter to be removed.</para> </entry> </row></tbody></tgroup></informaltable> &return-value-dvb; -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
