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Current File : /usr/include/linux/media.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Multimedia device API
 *
 * Copyright (C) 2010 Nokia Corporation
 *
 * Contacts: Laurent Pinchart <[email protected]>
 *	     Sakari Ailus <[email protected]>
 *
 * 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.
 */

#ifndef __LINUX_MEDIA_H
#define __LINUX_MEDIA_H

#include <stdint.h>
#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];
};

/*
 * Base number ranges for entity functions
 *
 * NOTE: Userspace should not rely on these ranges to identify a group
 * of function types, as newer functions can be added with any name within
 * the full u32 range.
 *
 * Some older functions use the MEDIA_ENT_F_OLD_*_BASE range. Do not
 * change this, this is for backwards compatibility. When adding new
 * functions always use MEDIA_ENT_F_BASE.
 */
#define MEDIA_ENT_F_BASE			0x00000000
#define MEDIA_ENT_F_OLD_BASE			0x00010000
#define MEDIA_ENT_F_OLD_SUBDEV_BASE		0x00020000

/*
 * Initial value to be used when a new entity is created
 * Drivers should change it to something useful.
 */
#define MEDIA_ENT_F_UNKNOWN			MEDIA_ENT_F_BASE

/*
 * Subdevs are initialized with MEDIA_ENT_F_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_V4L2_SUBDEV_UNKNOWN		MEDIA_ENT_F_OLD_SUBDEV_BASE

/*
 * DVB entity functions
 */
#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 entity functions
 */
#define MEDIA_ENT_F_IO_V4L			(MEDIA_ENT_F_OLD_BASE + 1)
#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)

/*
 * Sensor functions
 */
#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)

/*
 * Video decoder functions
 */
#define MEDIA_ENT_F_ATV_DECODER			(MEDIA_ENT_F_OLD_SUBDEV_BASE + 4)
#define MEDIA_ENT_F_DTV_DECODER			(MEDIA_ENT_F_BASE + 0x6001)

/*
 * Digital TV, analog TV, radio and/or software defined radio tuner functions.
 *
 * 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)

/*
 * Analog TV IF-PLL decoder functions
 *
 * 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 entity functions
 */
#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 entity functions
 */
#define MEDIA_ENT_F_VID_MUX			(MEDIA_ENT_F_BASE + 0x5001)
#define MEDIA_ENT_F_VID_IF_BRIDGE		(MEDIA_ENT_F_BASE + 0x5002)

/* Entity flags */
#define MEDIA_ENT_FL_DEFAULT			(1 << 0)
#define MEDIA_ENT_FL_CONNECTOR			(1 << 1)

/* OR with the entity id value to find the next entity */
#define MEDIA_ENT_ID_FLAG_NEXT			(1 << 31)

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;

		/*
		 * 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).
		 */
		struct {
			__u32 card;
			__u32 device;
			__u32 subdevice;
		} alsa;

		/*
		 * DEPRECATED: previous node specifications. Kept just to
		 * avoid breaking compilation. Use media_entity_desc.dev
		 * instead.
		 */
		struct {
			__u32 major;
			__u32 minor;
		} v4l;
		struct {
			__u32 major;
			__u32 minor;
		} fb;
		int dvb;

		/* 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 *pads;
	/* Should have enough room for links elements */
	struct media_link_desc *links;
	__u32 reserved[4];
};

/* Interface type ranges */

#define MEDIA_INTF_T_DVB_BASE			0x00000100
#define MEDIA_INTF_T_V4L_BASE			0x00000200

/* 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)


/*
 * MC next gen API definitions
 */

struct media_v2_entity {
	__u32 id;
	char name[64];
	__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)


/*
 * Legacy symbols used to avoid userspace compilation breakages.
 * Do not use any of this in new applications!
 *
 * 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

#define MEDIA_ENT_T_DEVNODE_UNKNOWN		(MEDIA_ENT_F_OLD_BASE | \
						 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_F_OLD_BASE + 2)
#define MEDIA_ENT_T_DEVNODE_ALSA		(MEDIA_ENT_F_OLD_BASE + 3)
#define MEDIA_ENT_T_DEVNODE_DVB			(MEDIA_ENT_F_OLD_BASE + 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

/*
 * There is still no ALSA support in the media controller. These
 * defines should not have been added and we leave them here only
 * in case some application tries to use these defines.
 */
#define MEDIA_INTF_T_ALSA_BASE			0x00000300
#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)

/* Obsolete symbol for media_version, no longer used in the kernel */
#define MEDIA_API_VERSION			KERNEL_VERSION(0, 1, 0)


#endif /* __LINUX_MEDIA_H */

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