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dmx.h
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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 * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #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_ */