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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.dmx
+
+.. _DMX_ADD_PID:
+
+===========
+DMX_ADD_PID
+===========
+
+Name
+----
+
+DMX_ADD_PID
+
+Synopsis
+--------
+
+.. c:macro:: DMX_ADD_PID
+
+``int ioctl(fd, DMX_ADD_PID, __u16 *pid)``
+
+Arguments
+---------
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``pid``
+   PID number to be filtered.
+
+Description
+-----------
+
+This ioctl call allows to add multiple PIDs to a transport stream filter
+previously set up with :ref:`DMX_SET_PES_FILTER` and output equal to
+:c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`.
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.