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327 lines
9.9 KiB
C
327 lines
9.9 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
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/*
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* dmx.h
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*
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* Copyright (C) 2000 Marcus Metzler <marcus@convergence.de>
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* & Ralph Metzler <ralph@convergence.de>
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* for convergence integrated media GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _DVBDMX_H_
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#define _DVBDMX_H_
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#include <linux/types.h>
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#include <time.h>
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#define DMX_FILTER_SIZE 16
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/**
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* enum dmx_output - Output for the demux.
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*
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* @DMX_OUT_DECODER:
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* Streaming directly to decoder.
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* @DMX_OUT_TAP:
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* Output going to a memory buffer (to be retrieved via the read command).
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* Delivers the stream output to the demux device on which the ioctl
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* is called.
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* @DMX_OUT_TS_TAP:
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* Output multiplexed into a new TS (to be retrieved by reading from the
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* logical DVR device). Routes output to the logical DVR device
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* ``/dev/dvb/adapter?/dvr?``, which delivers a TS multiplexed from all
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* filters for which @DMX_OUT_TS_TAP was specified.
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* @DMX_OUT_TSDEMUX_TAP:
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* Like @DMX_OUT_TS_TAP but retrieved from the DMX device.
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*/
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enum dmx_output {
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DMX_OUT_DECODER,
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DMX_OUT_TAP,
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DMX_OUT_TS_TAP,
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DMX_OUT_TSDEMUX_TAP
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};
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/**
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* enum dmx_input - Input from the demux.
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*
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* @DMX_IN_FRONTEND: Input from a front-end device.
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* @DMX_IN_DVR: Input from the logical DVR device.
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*/
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enum dmx_input {
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DMX_IN_FRONTEND,
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DMX_IN_DVR
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};
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/**
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* enum dmx_ts_pes - type of the PES filter.
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*
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* @DMX_PES_AUDIO0: first audio PID. Also referred as @DMX_PES_AUDIO.
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* @DMX_PES_VIDEO0: first video PID. Also referred as @DMX_PES_VIDEO.
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* @DMX_PES_TELETEXT0: first teletext PID. Also referred as @DMX_PES_TELETEXT.
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* @DMX_PES_SUBTITLE0: first subtitle PID. Also referred as @DMX_PES_SUBTITLE.
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* @DMX_PES_PCR0: first Program Clock Reference PID.
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* Also referred as @DMX_PES_PCR.
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*
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* @DMX_PES_AUDIO1: second audio PID.
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* @DMX_PES_VIDEO1: second video PID.
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* @DMX_PES_TELETEXT1: second teletext PID.
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* @DMX_PES_SUBTITLE1: second subtitle PID.
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* @DMX_PES_PCR1: second Program Clock Reference PID.
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*
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* @DMX_PES_AUDIO2: third audio PID.
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* @DMX_PES_VIDEO2: third video PID.
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* @DMX_PES_TELETEXT2: third teletext PID.
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* @DMX_PES_SUBTITLE2: third subtitle PID.
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* @DMX_PES_PCR2: third Program Clock Reference PID.
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*
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* @DMX_PES_AUDIO3: fourth audio PID.
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* @DMX_PES_VIDEO3: fourth video PID.
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* @DMX_PES_TELETEXT3: fourth teletext PID.
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* @DMX_PES_SUBTITLE3: fourth subtitle PID.
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* @DMX_PES_PCR3: fourth Program Clock Reference PID.
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*
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* @DMX_PES_OTHER: any other PID.
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*/
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enum dmx_ts_pes {
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DMX_PES_AUDIO0,
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DMX_PES_VIDEO0,
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DMX_PES_TELETEXT0,
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DMX_PES_SUBTITLE0,
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DMX_PES_PCR0,
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DMX_PES_AUDIO1,
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DMX_PES_VIDEO1,
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DMX_PES_TELETEXT1,
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DMX_PES_SUBTITLE1,
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DMX_PES_PCR1,
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DMX_PES_AUDIO2,
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DMX_PES_VIDEO2,
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DMX_PES_TELETEXT2,
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DMX_PES_SUBTITLE2,
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DMX_PES_PCR2,
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DMX_PES_AUDIO3,
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DMX_PES_VIDEO3,
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DMX_PES_TELETEXT3,
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DMX_PES_SUBTITLE3,
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DMX_PES_PCR3,
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DMX_PES_OTHER
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};
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#define DMX_PES_AUDIO DMX_PES_AUDIO0
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#define DMX_PES_VIDEO DMX_PES_VIDEO0
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#define DMX_PES_TELETEXT DMX_PES_TELETEXT0
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#define DMX_PES_SUBTITLE DMX_PES_SUBTITLE0
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#define DMX_PES_PCR DMX_PES_PCR0
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/**
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* struct dmx_filter - Specifies a section header filter.
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*
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* @filter: bit array with bits to be matched at the section header.
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* @mask: bits that are valid at the filter bit array.
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* @mode: mode of match: if bit is zero, it will match if equal (positive
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* match); if bit is one, it will match if the bit is negated.
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*
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* Note: All arrays in this struct have a size of DMX_FILTER_SIZE (16 bytes).
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*/
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struct dmx_filter {
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__u8 filter[DMX_FILTER_SIZE];
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__u8 mask[DMX_FILTER_SIZE];
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__u8 mode[DMX_FILTER_SIZE];
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};
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/**
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* struct dmx_sct_filter_params - Specifies a section filter.
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*
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* @pid: PID to be filtered.
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* @filter: section header filter, as defined by &struct dmx_filter.
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* @timeout: maximum time to filter, in milliseconds.
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* @flags: extra flags for the section filter.
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*
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* Carries the configuration for a MPEG-TS section filter.
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*
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* The @flags can be:
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*
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* - %DMX_CHECK_CRC - only deliver sections where the CRC check succeeded;
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* - %DMX_ONESHOT - disable the section filter after one section
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* has been delivered;
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* - %DMX_IMMEDIATE_START - Start filter immediately without requiring a
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* :ref:`DMX_START`.
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*/
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struct dmx_sct_filter_params {
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__u16 pid;
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struct dmx_filter filter;
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__u32 timeout;
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__u32 flags;
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#define DMX_CHECK_CRC 1
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#define DMX_ONESHOT 2
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#define DMX_IMMEDIATE_START 4
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};
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/**
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* struct dmx_pes_filter_params - Specifies Packetized Elementary Stream (PES)
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* filter parameters.
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*
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* @pid: PID to be filtered.
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* @input: Demux input, as specified by &enum dmx_input.
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* @output: Demux output, as specified by &enum dmx_output.
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* @pes_type: Type of the pes filter, as specified by &enum dmx_pes_type.
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* @flags: Demux PES flags.
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*/
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struct dmx_pes_filter_params {
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__u16 pid;
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enum dmx_input input;
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enum dmx_output output;
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enum dmx_ts_pes pes_type;
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__u32 flags;
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};
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/**
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* struct dmx_stc - Stores System Time Counter (STC) information.
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*
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* @num: input data: number of the STC, from 0 to N.
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* @base: output: divisor for STC to get 90 kHz clock.
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* @stc: output: stc in @base * 90 kHz units.
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*/
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struct dmx_stc {
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unsigned int num;
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unsigned int base;
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__u64 stc;
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};
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/**
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* enum dmx_buffer_flags - DMX memory-mapped buffer flags
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*
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* @DMX_BUFFER_FLAG_HAD_CRC32_DISCARD:
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* Indicates that the Kernel discarded one or more frames due to wrong
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* CRC32 checksum.
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* @DMX_BUFFER_FLAG_TEI:
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* Indicates that the Kernel has detected a Transport Error indicator
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* (TEI) on a filtered pid.
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* @DMX_BUFFER_PKT_COUNTER_MISMATCH:
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* Indicates that the Kernel has detected a packet counter mismatch
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* on a filtered pid.
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* @DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED:
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* Indicates that the Kernel has detected one or more frame discontinuity.
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* @DMX_BUFFER_FLAG_DISCONTINUITY_INDICATOR:
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* Received at least one packet with a frame discontinuity indicator.
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*/
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enum dmx_buffer_flags {
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DMX_BUFFER_FLAG_HAD_CRC32_DISCARD = 1 << 0,
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DMX_BUFFER_FLAG_TEI = 1 << 1,
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DMX_BUFFER_PKT_COUNTER_MISMATCH = 1 << 2,
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DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED = 1 << 3,
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DMX_BUFFER_FLAG_DISCONTINUITY_INDICATOR = 1 << 4,
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};
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/**
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* struct dmx_buffer - dmx buffer info
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*
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* @index: id number of the buffer
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* @bytesused: number of bytes occupied by data in the buffer (payload);
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* @offset: for buffers with memory == DMX_MEMORY_MMAP;
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* offset from the start of the device memory for this plane,
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* (or a "cookie" that should be passed to mmap() as offset)
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* @length: size in bytes of the buffer
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* @flags: bit array of buffer flags as defined by &enum dmx_buffer_flags.
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* Filled only at &DMX_DQBUF.
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* @count: monotonic counter for filled buffers. Helps to identify
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* data stream loses. Filled only at &DMX_DQBUF.
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*
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* Contains data exchanged by application and driver using one of the streaming
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* I/O methods.
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*
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* Please notice that, for &DMX_QBUF, only @index should be filled.
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* On &DMX_DQBUF calls, all fields will be filled by the Kernel.
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*/
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struct dmx_buffer {
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__u32 index;
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__u32 bytesused;
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__u32 offset;
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__u32 length;
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__u32 flags;
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__u32 count;
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};
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/**
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* struct dmx_requestbuffers - request dmx buffer information
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*
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* @count: number of requested buffers,
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* @size: size in bytes of the requested buffer
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*
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* Contains data used for requesting a dmx buffer.
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* All reserved fields must be set to zero.
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*/
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struct dmx_requestbuffers {
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__u32 count;
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__u32 size;
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};
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/**
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* struct dmx_exportbuffer - export of dmx buffer as DMABUF file descriptor
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*
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* @index: id number of the buffer
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* @flags: flags for newly created file, currently only O_CLOEXEC is
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* supported, refer to manual of open syscall for more details
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* @fd: file descriptor associated with DMABUF (set by driver)
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*
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* Contains data used for exporting a dmx buffer as DMABUF file descriptor.
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* The buffer is identified by a 'cookie' returned by DMX_QUERYBUF
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* (identical to the cookie used to mmap() the buffer to userspace). All
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* reserved fields must be set to zero. The field reserved0 is expected to
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* become a structure 'type' allowing an alternative layout of the structure
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* content. Therefore this field should not be used for any other extensions.
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*/
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struct dmx_exportbuffer {
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__u32 index;
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__u32 flags;
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__s32 fd;
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};
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#define DMX_START _IO('o', 41)
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#define DMX_STOP _IO('o', 42)
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#define DMX_SET_FILTER _IOW('o', 43, struct dmx_sct_filter_params)
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#define DMX_SET_PES_FILTER _IOW('o', 44, struct dmx_pes_filter_params)
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#define DMX_SET_BUFFER_SIZE _IO('o', 45)
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#define DMX_GET_PES_PIDS _IOR('o', 47, __u16[5])
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#define DMX_GET_STC _IOWR('o', 50, struct dmx_stc)
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#define DMX_ADD_PID _IOW('o', 51, __u16)
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#define DMX_REMOVE_PID _IOW('o', 52, __u16)
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/* This is needed for legacy userspace support */
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typedef enum dmx_output dmx_output_t;
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typedef enum dmx_input dmx_input_t;
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typedef enum dmx_ts_pes dmx_pes_type_t;
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typedef struct dmx_filter dmx_filter_t;
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#define DMX_REQBUFS _IOWR('o', 60, struct dmx_requestbuffers)
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#define DMX_QUERYBUF _IOWR('o', 61, struct dmx_buffer)
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#define DMX_EXPBUF _IOWR('o', 62, struct dmx_exportbuffer)
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#define DMX_QBUF _IOWR('o', 63, struct dmx_buffer)
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#define DMX_DQBUF _IOWR('o', 64, struct dmx_buffer)
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#endif /* _DVBDMX_H_ */
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