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