5. Media Controller Header File¶
5.1. media.h¶
/* * 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> structmedia_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) structmedia_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) structmedia_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) structmedia_link_desc{ structmedia_pad_descsource; structmedia_pad_descsink; __u32 flags; __u32 reserved[2]; }; structmedia_links_enum{ __u32 entity; /* Should have enough room for pads elements */ structmedia_pad_desc__user *pads; /* Should have enough room for links elements */ structmedia_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. */ structmedia_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 */ structmedia_v2_intf_devnode{ __u32 major; __u32 minor; } __attribute__ ((packed)); structmedia_v2_interface{ __u32 id; __u32 intf_type; __u32 flags; __u32 reserved[9]; union { structmedia_v2_intf_devnodedevnode; __u32 raw[16]; }; } __attribute__ ((packed)); structmedia_v2_pad{ __u32 id; __u32 entity_id; __u32 flags; __u32 reserved[5]; } __attribute__ ((packed)); structmedia_v2_link{ __u32 id; __u32 source_id; __u32 sink_id; __u32 flags; __u32 reserved[6]; } __attribute__ ((packed)); structmedia_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, structmedia_device_info) #define MEDIA_IOC_ENUM_ENTITIES _IOWR('|', 0x01, structmedia_entity_desc) #define MEDIA_IOC_ENUM_LINKS _IOWR('|', 0x02, structmedia_links_enum) #define MEDIA_IOC_SETUP_LINK _IOWR('|', 0x03, structmedia_link_desc) #define MEDIA_IOC_G_TOPOLOGY _IOWR('|', 0x04, structmedia_v2_topology) #endif /* __LINUX_MEDIA_H */