/* SPDX-License-Identifier: GPL-2.0 */ /* * Broadcom BCM2835 V4L2 driver * * Copyright © 2013 Raspberry Pi (Trading) Ltd. * * Authors: Vincent Sanders @ Collabora * Dave Stevenson @ Broadcom * (now [email protected]) * Simon Mellor @ Broadcom * Luke Diamand @ Broadcom */ /* * all the data structures which serialise the MMAL protocol. note * these are directly mapped onto the recived message data. * * BEWARE: They seem to *assume* pointers are u32 and that there is no * structure padding! * * NOTE: this implementation uses kernel types to ensure sizes. Rather * than assigning values to enums to force their size the * implementation uses fixed size types and not the enums (though the * comments have the actual enum type */ #ifndef MMAL_MSG_H #define MMAL_MSG_H #define VC_MMAL_VER … #define VC_MMAL_MIN_VER … /* max total message size is 512 bytes */ #define MMAL_MSG_MAX_SIZE … /* with six 32bit header elements max payload is therefore 488 bytes */ #define MMAL_MSG_MAX_PAYLOAD … #include "mmal-msg-common.h" #include "mmal-msg-format.h" #include "mmal-msg-port.h" #include "mmal-vchiq.h" enum mmal_msg_type { … }; /* port action request messages differ depending on the action type */ enum mmal_msg_port_action_type { … }; struct mmal_msg_header { … }; /* Send from VC to host to report version */ struct mmal_msg_version { … }; /* request to VC to create component */ struct mmal_msg_component_create { … }; /* reply from VC to component creation request */ struct mmal_msg_component_create_reply { … }; /* request to VC to destroy a component */ struct mmal_msg_component_destroy { … }; struct mmal_msg_component_destroy_reply { … }; /* request and reply to VC to enable a component */ struct mmal_msg_component_enable { … }; struct mmal_msg_component_enable_reply { … }; /* request and reply to VC to disable a component */ struct mmal_msg_component_disable { … }; struct mmal_msg_component_disable_reply { … }; /* request to VC to get port information */ struct mmal_msg_port_info_get { … }; /* reply from VC to get port info request */ struct mmal_msg_port_info_get_reply { … }; /* request to VC to set port information */ struct mmal_msg_port_info_set { … }; /* reply from VC to port info set request */ struct mmal_msg_port_info_set_reply { … }; /* port action requests that take a mmal_port as a parameter */ struct mmal_msg_port_action_port { … }; /* port action requests that take handles as a parameter */ struct mmal_msg_port_action_handle { … }; struct mmal_msg_port_action_reply { … }; /* MMAL buffer transfer */ /* Size of space reserved in a buffer message for short messages. */ #define MMAL_VC_SHORT_DATA … /* Signals that the current payload is the end of the stream of data */ #define MMAL_BUFFER_HEADER_FLAG_EOS … /* Signals that the start of the current payload starts a frame */ #define MMAL_BUFFER_HEADER_FLAG_FRAME_START … /* Signals that the end of the current payload ends a frame */ #define MMAL_BUFFER_HEADER_FLAG_FRAME_END … /* Signals that the current payload contains only complete frames (>1) */ #define MMAL_BUFFER_HEADER_FLAG_FRAME … /* Signals that the current payload is a keyframe (i.e. self decodable) */ #define MMAL_BUFFER_HEADER_FLAG_KEYFRAME … /* * Signals a discontinuity in the stream of data (e.g. after a seek). * Can be used for instance by a decoder to reset its state */ #define MMAL_BUFFER_HEADER_FLAG_DISCONTINUITY … /* * Signals a buffer containing some kind of config data for the component * (e.g. codec config data) */ #define MMAL_BUFFER_HEADER_FLAG_CONFIG … /* Signals an encrypted payload */ #define MMAL_BUFFER_HEADER_FLAG_ENCRYPTED … /* Signals a buffer containing side information */ #define MMAL_BUFFER_HEADER_FLAG_CODECSIDEINFO … /* * Signals a buffer which is the snapshot/postview image from a stills * capture */ #define MMAL_BUFFER_HEADER_FLAGS_SNAPSHOT … /* Signals a buffer which contains data known to be corrupted */ #define MMAL_BUFFER_HEADER_FLAG_CORRUPTED … /* Signals that a buffer failed to be transmitted */ #define MMAL_BUFFER_HEADER_FLAG_TRANSMISSION_FAILED … struct mmal_driver_buffer { … }; /* buffer header */ struct mmal_buffer_header { … }; struct mmal_buffer_header_type_specific { … }; struct mmal_msg_buffer_from_host { … }; /* port parameter setting */ #define MMAL_WORKER_PORT_PARAMETER_SPACE … struct mmal_msg_port_parameter_set { … }; struct mmal_msg_port_parameter_set_reply { … }; /* port parameter getting */ struct mmal_msg_port_parameter_get { … }; struct mmal_msg_port_parameter_get_reply { … }; /* event messages */ #define MMAL_WORKER_EVENT_SPACE … struct mmal_msg_event_to_host { … }; /* all mmal messages are serialised through this structure */ struct mmal_msg { … }; #endif
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