Viewing file:  media.h (12.64 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Multimedia device API
*
* Copyright (C) 2010 Nokia Corporation
*
* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 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 __LINUX_MEDIA_H
#define __LINUX_MEDIA_H
#ifndef __KERNEL__
#include <stdint.h>
#endif
#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/version.h>
struct media_device_info {
char driver[16];
char model[32];
char serial[40];
char bus_info[32];
__u32 media_version;
__u32 hw_revision;
__u32 driver_version;
__u32 reserved[31];
};
#define MEDIA_ENT_ID_FLAG_NEXT (1 << 31)
/*
* Initial value to be used when a new entity is created
* Drivers should change it to something useful
*/
#define MEDIA_ENT_F_UNKNOWN 0x00000000
/*
* Base number ranges for entity functions
*
* NOTE: those ranges and entity function number are phased just to
* make it easier to maintain this file. Userspace should not rely on
* the ranges to identify a group of function types, as newer
* functions can be added with any name within the full u32 range.
*/
#define MEDIA_ENT_F_BASE 0x00000000
#define MEDIA_ENT_F_OLD_BASE 0x00010000
#define MEDIA_ENT_F_OLD_SUBDEV_BASE 0x00020000
/*
* DVB entities
*/
#define MEDIA_ENT_F_DTV_DEMOD (MEDIA_ENT_F_BASE + 0x00001)
#define MEDIA_ENT_F_TS_DEMUX (MEDIA_ENT_F_BASE + 0x00002)
#define MEDIA_ENT_F_DTV_CA (MEDIA_ENT_F_BASE + 0x00003)
#define MEDIA_ENT_F_DTV_NET_DECAP (MEDIA_ENT_F_BASE + 0x00004)
/*
* I/O entities
*/
#define MEDIA_ENT_F_IO_DTV (MEDIA_ENT_F_BASE + 0x01001)
#define MEDIA_ENT_F_IO_VBI (MEDIA_ENT_F_BASE + 0x01002)
#define MEDIA_ENT_F_IO_SWRADIO (MEDIA_ENT_F_BASE + 0x01003)
/*
* Analog TV IF-PLL decoders
*
* It is a responsibility of the master/bridge drivers to create links
* for MEDIA_ENT_F_IF_VID_DECODER and MEDIA_ENT_F_IF_AUD_DECODER.
*/
#define MEDIA_ENT_F_IF_VID_DECODER (MEDIA_ENT_F_BASE + 0x02001)
#define MEDIA_ENT_F_IF_AUD_DECODER (MEDIA_ENT_F_BASE + 0x02002)
/*
* Audio Entity Functions
*/
#define MEDIA_ENT_F_AUDIO_CAPTURE (MEDIA_ENT_F_BASE + 0x03001)
#define MEDIA_ENT_F_AUDIO_PLAYBACK (MEDIA_ENT_F_BASE + 0x03002)
#define MEDIA_ENT_F_AUDIO_MIXER (MEDIA_ENT_F_BASE + 0x03003)
/*
* Processing entities
*/
#define MEDIA_ENT_F_PROC_VIDEO_COMPOSER (MEDIA_ENT_F_BASE + 0x4001)
#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER (MEDIA_ENT_F_BASE + 0x4002)
#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV (MEDIA_ENT_F_BASE + 0x4003)
#define MEDIA_ENT_F_PROC_VIDEO_LUT (MEDIA_ENT_F_BASE + 0x4004)
#define MEDIA_ENT_F_PROC_VIDEO_SCALER (MEDIA_ENT_F_BASE + 0x4005)
#define MEDIA_ENT_F_PROC_VIDEO_STATISTICS (MEDIA_ENT_F_BASE + 0x4006)
/*
* Switch and bridge entitites
*/
#define MEDIA_ENT_F_VID_MUX (MEDIA_ENT_F_BASE + 0x5001)
#define MEDIA_ENT_F_VID_IF_BRIDGE (MEDIA_ENT_F_BASE + 0x5002)
/*
* Connectors
*/
/* It is a responsibility of the entity drivers to add connectors and links */
#ifdef __KERNEL__
/*
* For now, it should not be used in userspace, as some
* definitions may change
*/
#define MEDIA_ENT_F_CONN_RF (MEDIA_ENT_F_BASE + 0x30001)
#define MEDIA_ENT_F_CONN_SVIDEO (MEDIA_ENT_F_BASE + 0x30002)
#define MEDIA_ENT_F_CONN_COMPOSITE (MEDIA_ENT_F_BASE + 0x30003)
#endif
/*
* Don't touch on those. The ranges MEDIA_ENT_F_OLD_BASE and
* MEDIA_ENT_F_OLD_SUBDEV_BASE are kept to keep backward compatibility
* with the legacy v1 API.The number range is out of range by purpose:
* several previously reserved numbers got excluded from this range.
*
* Subdevs are initialized with MEDIA_ENT_T_V4L2_SUBDEV_UNKNOWN,
* in order to preserve backward compatibility.
* Drivers must change to the proper subdev type before
* registering the entity.
*/
#define MEDIA_ENT_F_IO_V4L (MEDIA_ENT_F_OLD_BASE + 1)
#define MEDIA_ENT_F_CAM_SENSOR (MEDIA_ENT_F_OLD_SUBDEV_BASE + 1)
#define MEDIA_ENT_F_FLASH (MEDIA_ENT_F_OLD_SUBDEV_BASE + 2)
#define MEDIA_ENT_F_LENS (MEDIA_ENT_F_OLD_SUBDEV_BASE + 3)
#define MEDIA_ENT_F_ATV_DECODER (MEDIA_ENT_F_OLD_SUBDEV_BASE + 4)
/*
* It is a responsibility of the master/bridge drivers to add connectors
* and links for MEDIA_ENT_F_TUNER. Please notice that some old tuners
* may require the usage of separate I2C chips to decode analog TV signals,
* when the master/bridge chipset doesn't have its own TV standard decoder.
* On such cases, the IF-PLL staging is mapped via one or two entities:
* MEDIA_ENT_F_IF_VID_DECODER and/or MEDIA_ENT_F_IF_AUD_DECODER.
*/
#define MEDIA_ENT_F_TUNER (MEDIA_ENT_F_OLD_SUBDEV_BASE + 5)
#define MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN MEDIA_ENT_F_OLD_SUBDEV_BASE
#if !defined(__KERNEL__) || defined(__NEED_MEDIA_LEGACY_API)
/*
* Legacy symbols used to avoid userspace compilation breakages
*
* Those symbols map the entity function into types and should be
* used only on legacy programs for legacy hardware. Don't rely
* on those for MEDIA_IOC_G_TOPOLOGY.
*/
#define MEDIA_ENT_TYPE_SHIFT 16
#define MEDIA_ENT_TYPE_MASK 0x00ff0000
#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
/* End of the old subdev reserved numberspace */
#define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_T_DEVNODE | \
MEDIA_ENT_SUBTYPE_MASK)
#define MEDIA_ENT_T_DEVNODE MEDIA_ENT_F_OLD_BASE
#define MEDIA_ENT_T_DEVNODE_V4L MEDIA_ENT_F_IO_V4L
#define MEDIA_ENT_T_DEVNODE_FB (MEDIA_ENT_T_DEVNODE + 2)
#define MEDIA_ENT_T_DEVNODE_ALSA (MEDIA_ENT_T_DEVNODE + 3)
#define MEDIA_ENT_T_DEVNODE_DVB (MEDIA_ENT_T_DEVNODE + 4)
#define MEDIA_ENT_T_UNKNOWN MEDIA_ENT_F_UNKNOWN
#define MEDIA_ENT_T_V4L2_VIDEO MEDIA_ENT_F_IO_V4L
#define MEDIA_ENT_T_V4L2_SUBDEV MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN
#define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR MEDIA_ENT_F_CAM_SENSOR
#define MEDIA_ENT_T_V4L2_SUBDEV_FLASH MEDIA_ENT_F_FLASH
#define MEDIA_ENT_T_V4L2_SUBDEV_LENS MEDIA_ENT_F_LENS
#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER MEDIA_ENT_F_ATV_DECODER
#define MEDIA_ENT_T_V4L2_SUBDEV_TUNER MEDIA_ENT_F_TUNER
/* Obsolete symbol for media_version, no longer used in the kernel */
#define MEDIA_API_VERSION KERNEL_VERSION(0, 1, 0)
#endif
/* Entity flags */
#define MEDIA_ENT_FL_DEFAULT (1 << 0)
#define MEDIA_ENT_FL_CONNECTOR (1 << 1)
struct media_entity_desc {
__u32 id;
char name[32];
__u32 type;
__u32 revision;
__u32 flags;
__u32 group_id;
__u16 pads;
__u16 links;
__u32 reserved[4];
union {
/* Node specifications */
struct {
__u32 major;
__u32 minor;
} dev;
#if 1
/*
* TODO: this shouldn't have been added without
* actual drivers that use this. When the first real driver
* appears that sets this information, special attention
* should be given whether this information is 1) enough, and
* 2) can deal with udev rules that rename devices. The struct
* dev would not be sufficient for this since that does not
* contain the subdevice information. In addition, struct dev
* can only refer to a single device, and not to multiple (e.g.
* pcm and mixer devices).
*
* So for now mark this as a to do.
*/
struct {
__u32 card;
__u32 device;
__u32 subdevice;
} alsa;
#endif
#if 1
/*
* DEPRECATED: previous node specifications. Kept just to
* avoid breaking compilation, but media_entity_desc.dev
* should be used instead. In particular, alsa and dvb
* fields below are wrong: for all devnodes, there should
* be just major/minor inside the struct, as this is enough
* to represent any devnode, no matter what type.
*/
struct {
__u32 major;
__u32 minor;
} v4l;
struct {
__u32 major;
__u32 minor;
} fb;
int dvb;
#endif
/* Sub-device specifications */
/* Nothing needed yet */
__u8 raw[184];
};
};
#define MEDIA_PAD_FL_SINK (1 << 0)
#define MEDIA_PAD_FL_SOURCE (1 << 1)
#define MEDIA_PAD_FL_MUST_CONNECT (1 << 2)
struct media_pad_desc {
__u32 entity; /* entity ID */
__u16 index; /* pad index */
__u32 flags; /* pad flags */
__u32 reserved[2];
};
#define MEDIA_LNK_FL_ENABLED (1 << 0)
#define MEDIA_LNK_FL_IMMUTABLE (1 << 1)
#define MEDIA_LNK_FL_DYNAMIC (1 << 2)
#define MEDIA_LNK_FL_LINK_TYPE (0xf << 28)
# define MEDIA_LNK_FL_DATA_LINK (0 << 28)
# define MEDIA_LNK_FL_INTERFACE_LINK (1 << 28)
struct media_link_desc {
struct media_pad_desc source;
struct media_pad_desc sink;
__u32 flags;
__u32 reserved[2];
};
struct media_links_enum {
__u32 entity;
/* Should have enough room for pads elements */
struct media_pad_desc __user *pads;
/* Should have enough room for links elements */
struct media_link_desc __user *links;
__u32 reserved[4];
};
/* Interface type ranges */
#define MEDIA_INTF_T_DVB_BASE 0x00000100
#define MEDIA_INTF_T_V4L_BASE 0x00000200
#define MEDIA_INTF_T_ALSA_BASE 0x00000300
/* Interface types */
#define MEDIA_INTF_T_DVB_FE (MEDIA_INTF_T_DVB_BASE)
#define MEDIA_INTF_T_DVB_DEMUX (MEDIA_INTF_T_DVB_BASE + 1)
#define MEDIA_INTF_T_DVB_DVR (MEDIA_INTF_T_DVB_BASE + 2)
#define MEDIA_INTF_T_DVB_CA (MEDIA_INTF_T_DVB_BASE + 3)
#define MEDIA_INTF_T_DVB_NET (MEDIA_INTF_T_DVB_BASE + 4)
#define MEDIA_INTF_T_V4L_VIDEO (MEDIA_INTF_T_V4L_BASE)
#define MEDIA_INTF_T_V4L_VBI (MEDIA_INTF_T_V4L_BASE + 1)
#define MEDIA_INTF_T_V4L_RADIO (MEDIA_INTF_T_V4L_BASE + 2)
#define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
#define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
#define MEDIA_INTF_T_V4L_TOUCH (MEDIA_INTF_T_V4L_BASE + 5)
#define MEDIA_INTF_T_ALSA_PCM_CAPTURE (MEDIA_INTF_T_ALSA_BASE)
#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK (MEDIA_INTF_T_ALSA_BASE + 1)
#define MEDIA_INTF_T_ALSA_CONTROL (MEDIA_INTF_T_ALSA_BASE + 2)
#define MEDIA_INTF_T_ALSA_COMPRESS (MEDIA_INTF_T_ALSA_BASE + 3)
#define MEDIA_INTF_T_ALSA_RAWMIDI (MEDIA_INTF_T_ALSA_BASE + 4)
#define MEDIA_INTF_T_ALSA_HWDEP (MEDIA_INTF_T_ALSA_BASE + 5)
#define MEDIA_INTF_T_ALSA_SEQUENCER (MEDIA_INTF_T_ALSA_BASE + 6)
#define MEDIA_INTF_T_ALSA_TIMER (MEDIA_INTF_T_ALSA_BASE + 7)
/*
* MC next gen API definitions
*
* NOTE: The declarations below are close to the MC RFC for the Media
* Controller, the next generation. Yet, there are a few adjustments
* to do, as we want to be able to have a functional API before
* the MC properties change. Those will be properly marked below.
* Please also notice that I removed "num_pads", "num_links",
* from the proposal, as a proper userspace application will likely
* use lists for pads/links, just as we intend to do in Kernelspace.
* The API definition should be freed from fields that are bound to
* some specific data structure.
*
* FIXME: Currently, I opted to name the new types as "media_v2", as this
* won't cause any conflict with the Kernelspace namespace, nor with
* the previous kAPI media_*_desc namespace. This can be changed
* later, before the adding this API upstream.
*/
struct media_v2_entity {
__u32 id;
char name[64]; /* FIXME: move to a property? (RFC says so) */
__u32 function; /* Main function of the entity */
__u32 reserved[6];
} __attribute__ ((packed));
/* Should match the specific fields at media_intf_devnode */
struct media_v2_intf_devnode {
__u32 major;
__u32 minor;
} __attribute__ ((packed));
struct media_v2_interface {
__u32 id;
__u32 intf_type;
__u32 flags;
__u32 reserved[9];
union {
struct media_v2_intf_devnode devnode;
__u32 raw[16];
};
} __attribute__ ((packed));
struct media_v2_pad {
__u32 id;
__u32 entity_id;
__u32 flags;
__u32 reserved[5];
} __attribute__ ((packed));
struct media_v2_link {
__u32 id;
__u32 source_id;
__u32 sink_id;
__u32 flags;
__u32 reserved[6];
} __attribute__ ((packed));
struct media_v2_topology {
__u64 topology_version;
__u32 num_entities;
__u32 reserved1;
__u64 ptr_entities;
__u32 num_interfaces;
__u32 reserved2;
__u64 ptr_interfaces;
__u32 num_pads;
__u32 reserved3;
__u64 ptr_pads;
__u32 num_links;
__u32 reserved4;
__u64 ptr_links;
} __attribute__ ((packed));
/* ioctls */
#define MEDIA_IOC_DEVICE_INFO _IOWR('|', 0x00, struct media_device_info)
#define MEDIA_IOC_ENUM_ENTITIES _IOWR('|', 0x01, struct media_entity_desc)
#define MEDIA_IOC_ENUM_LINKS _IOWR('|', 0x02, struct media_links_enum)
#define MEDIA_IOC_SETUP_LINK _IOWR('|', 0x03, struct media_link_desc)
#define MEDIA_IOC_G_TOPOLOGY _IOWR('|', 0x04, struct media_v2_topology)
#endif /* __LINUX_MEDIA_H */
|