Format-agnostic VLink bag player driven by an internal MessageLoop. 更多...

#include <bag_reader.h>

类 vlink::BagReader 继承关系图:

vlink::BagReader 的协作图:

类
struct	Config
	Playback parameters consumed by `play()`. 更多...

struct	Info
	Aggregated metadata extracted from the bag header, summary and URL index. 更多...

Public 类型
enum	Status : uint8_t { kStopped = 0 , kPaused = 1 , kPlaying = 2 }
	Coarse playback state observable through `get_status()`. 更多...

using	OutputCallback = FrameCallback
	Callback signature receiving one replayed `Frame`. 更多...

using	StatusCallback = MoveFunction< void(Status status)>
	Callback fired on every transition of `Status`. 更多...

using	ReadyCallback = MoveFunction< void()>
	Callback fired once after the bag has been opened and indexed. 更多...

using	FinishCallback = MoveFunction< void(bool is_interrupted)>
	Callback fired when the current play session ends. 更多...

Public 类型继承自 vlink::MessageLoop
enum	Type : uint8_t { kNormalType = 0 , kLockfreeType = 1 , kPriorityType = 2 }
	Internal queue implementation type. 更多...

enum	Strategy : uint8_t { kOptimizationStrategy = 0 , kPopStrategy = 1 , kBlockStrategy = 2 }
	Back-pressure strategy applied when the bounded queue is at capacity. 更多...

enum	Priority : uint16_t { kNoPriority = 0 , kLowestPriority = 1 , kTimerPriority = 50 , kNormalPriority = 100 , kHighestPriority = std::numeric_limits<uint16_t>::max() }
	Built-in priority levels for `kPriorityType` loops; higher values dispatch first. 更多...

using	Callback = MoveFunction< void()>
	Callback type for tasks and event handlers. 更多...

Public 成员函数
	BagReader (const std::string &path, bool read_only=true, bool try_to_fix=false)
	Constructs the base reader and stores construction-time options. 更多...

virtual	~BagReader ()
	Stops the loop, closes the file and releases backend resources. 更多...

virtual void	bind_plugin_interface (const std::shared_ptr< BagPluginInterface > &plugin_interface)
	Attaches a custom URL/type/message rewrite plugin to this reader. 更多...

virtual void	clear_plugin_interface ()
	Detaches the currently bound plugin, if any. 更多...

virtual void	register_status_callback (StatusCallback &&status_callback)
	Installs a state-change observer. 更多...

virtual void	register_ready_callback (ReadyCallback &&ready_callback)
	Installs the "open complete" observer. 更多...

virtual void	register_finish_callback (FinishCallback &&finish_callback)
	Installs the "play session ended" observer. 更多...

virtual void	register_output_callback (OutputCallback &&output_callback)
	Installs the per-frame data sink. 更多...

bool	open_cursor (const Config &config)
	Opens (or rewinds) a synchronous sequential read cursor over the bag. 更多...

bool	open_cursor ()
	Opens (or rewinds) a full, unfiltered sequential read cursor over the bag. 更多...

bool	read_next (Frame &out)
	Reads the next frame in recorded order into `out`. 更多...

BagReader &	operator>> (Frame &out)
	Stream-style alias for `read_next()`, enabling `while` (reader >> frame). 更多...

bool	eof () const noexcept
	Returns whether the cursor has reached the end of the bag. 更多...

bool	fail () const noexcept
	Returns whether the last cursor operation failed (open or backend read error). 更多...

	operator bool () const noexcept
	Reports whether the cursor is still in a readable state (not at end, not failed). 更多...

virtual void	play (const Config &config)=0
	Starts (or restarts) a play session with the supplied configuration. 更多...

virtual void	stop ()=0
	Aborts the active session and rewinds to the start of the bag. 更多...

virtual void	pause ()=0
	Suspends frame dispatch while preserving the current position. 更多...

virtual void	resume ()=0
	Resumes dispatch from the paused position. 更多...

virtual void	pause_to_next ()=0
	Emits exactly one frame from the paused position, then pauses again. 更多...

virtual void	jump (int64_t begin_time, double rate, int times, bool force_to_play=false)=0
	Seeks playback to `begin_time` and applies updated rate and loop settings. 更多...

virtual std::future< bool >	check ()=0
	Runs an asynchronous integrity verification pass. 更多...

virtual std::future< bool >	reindex ()=0
	Rebuilds backend index tables in the background where supported. 更多...

virtual std::future< bool >	fix (bool rebuild=false)=0
	Attempts to recover a corrupted bag in the background where supported. 更多...

virtual void	tag (const std::string &tag_name)=0
	Overwrites the human-readable tag stored in the bag header. 更多...

virtual int64_t	get_timestamp () const =0
	Returns the timestamp targeted by the playback cursor. 更多...

virtual int64_t	get_real_timestamp () const =0
	Returns the timestamp of the most recently emitted frame. 更多...

virtual Status	get_status () const =0
	Returns the current playback state. 更多...

virtual const Info &	get_info () const =0
	Returns the cached header/summary metadata. 更多...

virtual std::vector< SchemaData >	detect_schema ()=0
	Scans the bag and collects every embedded schema descriptor. 更多...

virtual std::string	get_ser_type (const std::string &url) const
	Resolves the serialisation type associated with `url`. 更多...

virtual SchemaType	get_schema_type (const std::string &url) const
	Resolves the schema family associated with `url`. 更多...

virtual bool	is_split_mode () const =0
	Returns whether the opened bag spans multiple split files. 更多...

virtual int	get_split_index () const =0
	Returns the zero-based index of the split file currently being consumed. 更多...

virtual bool	is_jumping () const =0
	Returns whether a `jump()` seek is still in progress. 更多...

Public 成员函数继承自 vlink::MessageLoop
	MessageLoop ()
	Constructs a loop with the default `kNormalType` queue. 更多...

	MessageLoop (Type type)
	Constructs a loop with the given queue type. 更多...

virtual	~MessageLoop ()
	Destructor; requests quit and joins the dispatcher thread if needed. 更多...

void	set_name (const std::string &name)
	Sets a human-readable name visible to profiling tools. 更多...

const std::string &	get_name () const
	Returns the loop name set via `set_name`. 更多...

Type	get_type () const
	Returns the queue type this loop was constructed with. 更多...

Strategy	get_strategy () const
	Returns the active back-pressure strategy. 更多...

void	set_strategy (Strategy strategy)
	Replaces the back-pressure strategy. 更多...

void	register_begin_handler (Callback &&callback)
	Registers a callback fired once at loop thread startup. 更多...

void	register_end_handler (Callback &&callback)
	Registers a callback fired once when the loop thread exits. 更多...

void	register_idle_handler (Callback &&callback)
	Registers a callback fired every time the queue becomes empty. 更多...

bool	run ()
	Runs the loop on the calling thread until `quit` is requested. 更多...

bool	async_run ()
	Starts the loop on a new background thread. 更多...

bool	spin ()
	Alias of `run` blocking the calling thread. 更多...

bool	spin_once (bool block=true)
	Processes one batch of pending tasks and timers on the calling thread. 更多...

bool	quit (bool force=false)
	Requests the loop to exit. 更多...

bool	wait_for_quit (int ms=Timer::kInfinite, bool check=true)
	Waits until the loop has fully exited. 更多...

bool	post_task (Callback &&callback)
	Posts a task for execution on the loop thread. 更多...

TaskHandle	post_task_handle (Callback &&callback, const PostTaskOptions &options={})
	Tracked variant of `post_task` returning a `TaskHandle`. 更多...

bool	post_task_with_priority (Callback &&callback, uint16_t priority)
	Posts a task with an explicit priority on a `kPriorityType` loop. 更多...

TaskHandle	post_task_with_priority_handle (Callback &&callback, uint16_t priority, const PostTaskOptions &options={})
	Tracked variant of `post_task_with_priority` returning a `TaskHandle`. 更多...

template<typename CallbackT , typename = std::enable_if_t<!std::is_convertible_v<CallbackT, Schedule::RetCallback>>>
Schedule::Status	exec_task (const Schedule::Config &config, CallbackT &&callback)
	Schedules a `void-returning` callable and returns a chainable `Schedule::Status`. 更多...

template<typename CallbackT , typename = std::enable_if_t<std::is_convertible_v<CallbackT, Schedule::RetCallback>>>
Schedule::RetStatus	exec_task (const Schedule::Config &config, CallbackT &&callback)
	Schedules a `bool-returning` callable and returns a chainable `Schedule::RetStatus`. 更多...

bool	wakeup ()
	Wakes the loop thread if it is suspended in its idle wait. 更多...

void	reset_lockfree_capacity ()
	Recreates the lock-free queue, clearing all queued tasks and counters. 更多...

bool	is_running () const
	Reports whether the loop is currently running. 更多...

bool	is_ready_to_quit () const
	Reports whether `quit` has been requested and the loop is winding down. 更多...

bool	is_busy () const
	Reports whether the loop is currently executing a task. 更多...

size_t	get_task_count () const
	Returns the current pending task count. 更多...

virtual bool	wait_for_idle (int ms=Timer::kInfinite, bool check=true)
	Waits until the loop has drained its queue and is not executing a task. 更多...

virtual size_t	get_max_task_count () const
	Returns the maximum queue depth. 更多...

virtual size_t	get_max_timer_count () const
	Returns the maximum number of timers that can be attached. 更多...

virtual uint32_t	get_max_elapsed_time () const
	Returns the maximum allowed task execution time in milliseconds. 更多...

virtual bool	is_in_same_thread () const
	Reports whether the calling thread is owned by this loop. 更多...

std::shared_ptr< AliveState >	get_alive_state () const
	Returns the shared lifetime flag used by cross-thread bridges. 更多...

template<class FunctionT , class... ArgsT, typename ResultT = std::invoke_result_t<FunctionT, ArgsT...>>
std::future< ResultT >	invoke_task (FunctionT &&function, ArgsT &&... args)
	Dispatches a callable to the loop thread and returns a `std::future` for the result. 更多...

template<class FunctionT , class... ArgsT, typename ResultT = std::invoke_result_t<FunctionT, ArgsT...>>
std::future< ResultT >	invoke_task_with_priority (FunctionT &&function, uint16_t priority, ArgsT &&... args)
	Priority variant of `invoke_task`; requires a `kPriorityType` loop. 更多...

静态 Public 成员函数
static std::shared_ptr< BagReader >	create (const std::string &path, bool read_only=true, bool try_to_fix=false)
	Builds the concrete reader matching the extension of `path`. 更多...

静态 Public 属性
static constexpr int	kInfinite {-1}
	Sentinel for `Config::times` that requests endless loop playback. 更多...

Protected 成员函数
virtual bool	do_open_cursor (const Config &config)

virtual bool	do_read_next (Frame &out, bool &is_error)

void	process_output (Frame &frame)

void	fill_frame_meta (Frame &frame) const

void	flush_plugin ()

void	process_url_metas (std::vector< Info::UrlMeta > &url_metas)

void	rebuild_url_meta_lookup (const std::vector< Info::UrlMeta > &url_metas)

std::unordered_map< std::string, std::string > &	url_ser_map ()

std::unordered_map< std::string, SchemaType > &	url_schema_type_map ()

bool	convert_playback_url (const std::string &input_url, std::string &output_url) const

bool	match_playback_url_filter (std::string_view input_url, const std::unordered_set< std::string > &filter_urls) const

void	detach_plugin ()

Protected 成员函数继承自 vlink::MessageLoop
virtual void	on_begin ()
	Hook invoked once on the loop thread before the first task runs. 更多...

virtual void	on_end ()
	Hook invoked once on the loop thread after the last task runs. 更多...

virtual void	on_idle ()
	Hook invoked on the loop thread each time the queue becomes empty. 更多...

virtual void	on_task_changed (Callback &&callback, uint32_t start_time)
	Dispatches a ready task on the loop thread. 更多...

virtual void	on_task_timeout (Callback &&callback, uint32_t elapsed_time)
	Hook invoked when a task exceeds `get_max_elapsed_time()`. 更多...

静态 Protected 成员函数
static void	rebuild_url_meta_maps (const std::vector< Info::UrlMeta > &url_metas, std::unordered_map< std::string, std::string > &ser_map, std::unordered_map< std::string, SchemaType > &schema_type_map)

static ActionType	convert_action (std::string_view str)

详细描述

Format-agnostic VLink bag player driven by an internal MessageLoop.

Inherits MessageLoop so playback runs on a dedicated worker thread. Construction opens the target file and parses its index, but no frames are emitted until async_run() starts the loop and play() supplies a Config. All virtual operations are implemented by VDBReader and VCAPReader; the base class only carries shared plumbing (callback storage, plugin binding, URL filtering helpers).

成员类型定义说明

◆ FinishCallback

using vlink::BagReader::FinishCallback = MoveFunction<void(bool is_interrupted)>

Callback fired when the current play session ends.

参数

is_interrupted True if termination was caused by stop(); false on natural end.

◆ OutputCallback

using vlink::BagReader::OutputCallback = FrameCallback

Callback signature receiving one replayed Frame.

Invoked on the reader's MessageLoop thread. Frame::timestamp is relative to the recording start (microseconds), url is the playback URL, and data is a shallow view valid only for the duration of the call – copy it if it must outlive the callback. Frame::ser_type / schema_type are filled by the reader from the bag's URL metadata, so the frame is fully populated (no separate get_ser_type() / get_schema_type() lookup is required).

注解: Multiply Config::begin_time and Config::end_time by 1000 before comparing them against Frame::timestamp.

◆ ReadyCallback

using vlink::BagReader::ReadyCallback = MoveFunction<void()>

Callback fired once after the bag has been opened and indexed.

◆ StatusCallback

using vlink::BagReader::StatusCallback = MoveFunction<void(Status status)>

Callback fired on every transition of Status.

参数

status The new playback state.

成员枚举类型说明

◆ Status

enum vlink::BagReader::Status : uint8_t

Coarse playback state observable through get_status().

Value	Meaning
kStopped	No active session; position is reset to the start of the bag
kPaused	A play session is open but the dispatcher is suspended
kPlaying	The dispatcher is actively delivering frames

枚举值
kStopped	Idle; no playback in progress.
kPaused	Playback temporarily suspended; position retained.
kPlaying	Actively forwarding frames to the output callback.

构造及析构函数说明

◆ BagReader()

vlink::BagReader::BagReader	(	const std::string &	path,
		bool	read_only = `true`,
		bool	try_to_fix = `false`
	)

explicit

Constructs the base reader and stores construction-time options.

参数

path	Bag file path passed to the concrete subclass.
read_only	When true, prevents the backend from acquiring write access.
try_to_fix	When true, allows the subclass to run recovery while opening.

◆ ~BagReader()

virtual vlink::BagReader::~BagReader ( )

virtual

Stops the loop, closes the file and releases backend resources.

成员函数说明

◆ bind_plugin_interface()

virtual void vlink::BagReader::bind_plugin_interface ( const std::shared_ptr< BagPluginInterface > & plugin_interface )

virtual

Attaches a custom URL/type/message rewrite plugin to this reader.

The plugin's convert_url_meta() runs once per URL discovered in the bag and may rename topics, override serialisation types or filter URLs out. Its on_read() hook sees every replayed frame before it reaches the user OutputCallback.

参数

plugin_interface Plugin instance, or nullptr to detach the current binding.

参见: clear_plugin_interface() for the named equivalent of passing nullptr.

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ check()

virtual std::future<bool> vlink::BagReader::check ( )

pure virtual

Runs an asynchronous integrity verification pass.

返回: Future resolving to true when the bag is structurally intact.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ clear_plugin_interface()

virtual void vlink::BagReader::clear_plugin_interface ( )

virtual

Detaches the currently bound plugin, if any.

Convenience wrapper equivalent to bind_plugin_interface(nullptr): flushes the bound plugin, clears its callback together with the plugin-derived URL remap / exclusion state, and drops the binding. Safe to call when no plugin is bound (in which case it is a no-op).

◆ convert_action()

static ActionType vlink::BagReader::convert_action ( std::string_view str )

staticprotected

◆ convert_playback_url()

bool vlink::BagReader::convert_playback_url	(	const std::string &	input_url,
		std::string &	output_url
	)		const

protected

◆ create()

static std::shared_ptr<BagReader> vlink::BagReader::create	(	const std::string &	path,
		bool	read_only = `true`,
		bool	try_to_fix = `false`
	)

static

Builds the concrete reader matching the extension of path.

Suffix dispatch: .vdb / .vdbx select VDBReader, .vcap / .vcapx select VCAPReader; any other suffix returns nullptr.

参数

path	Bag file path on disk.
read_only	When true, opens the backend read-only and rejects mutating calls.
try_to_fix	When true, allows backends to attempt a recovery pass while opening.

返回: Shared pointer to the freshly built reader, or nullptr for an unknown suffix.

◆ detach_plugin()

void vlink::BagReader::detach_plugin ( )

protected

◆ detect_schema()

virtual std::vector<SchemaData> vlink::BagReader::detect_schema ( )

pure virtual

Scans the bag and collects every embedded schema descriptor.

返回: Vector of SchemaData entries.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ do_open_cursor()

virtual bool vlink::BagReader::do_open_cursor ( const Config & config )

protectedvirtual

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ do_read_next()

virtual bool vlink::BagReader::do_read_next	(	Frame &	out,
		bool &	is_error
	)

protectedvirtual

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ eof()

bool vlink::BagReader::eof ( ) const

noexcept

Returns whether the cursor has reached the end of the bag.

◆ fail()

bool vlink::BagReader::fail ( ) const

noexcept

Returns whether the last cursor operation failed (open or backend read error).

◆ fill_frame_meta()

void vlink::BagReader::fill_frame_meta ( Frame & frame ) const

protected

◆ fix()

virtual std::future<bool> vlink::BagReader::fix ( bool rebuild = false )

pure virtual

Attempts to recover a corrupted bag in the background where supported.

参数

rebuild When true, also forces a full index rebuild.

返回: Future resolving to true when recovery succeeded.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ flush_plugin()

void vlink::BagReader::flush_plugin ( )

protected

◆ get_info()

virtual const Info& vlink::BagReader::get_info ( ) const

pure virtual

Returns the cached header/summary metadata.

返回: Constant reference to the Info populated at open time.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ get_real_timestamp()

virtual int64_t vlink::BagReader::get_real_timestamp ( ) const

pure virtual

Returns the timestamp of the most recently emitted frame.

返回: Real delivered timestamp in milliseconds, or 0 when no frame is in flight.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ get_schema_type()

virtual SchemaType vlink::BagReader::get_schema_type ( const std::string & url ) const

virtual

Resolves the schema family associated with url.

参数

url	Fully-qualified URL to look up.

返回: Coarse SchemaType, or SchemaType::kUnknown when unavailable.

◆ get_ser_type()

virtual std::string vlink::BagReader::get_ser_type ( const std::string & url ) const

virtual

Resolves the serialisation type associated with url.

参数

url	Fully-qualified URL to look up.

返回: Stored serialisation type, or an empty string when url is unknown.

◆ get_split_index()

virtual int vlink::BagReader::get_split_index ( ) const

pure virtual

Returns the zero-based index of the split file currently being consumed.

返回: Active split index, or 0 for a single-file bag.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ get_status()

virtual Status vlink::BagReader::get_status ( ) const

pure virtual

Returns the current playback state.

返回: One of kStopped, kPaused or kPlaying.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ get_timestamp()

virtual int64_t vlink::BagReader::get_timestamp ( ) const

pure virtual

Returns the timestamp targeted by the playback cursor.

返回: Current playback time in milliseconds, relative to the recording start.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ is_jumping()

virtual bool vlink::BagReader::is_jumping ( ) const

pure virtual

Returns whether a jump() seek is still in progress.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ is_split_mode()

virtual bool vlink::BagReader::is_split_mode ( ) const

pure virtual

Returns whether the opened bag spans multiple split files.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ jump()

virtual void vlink::BagReader::jump	(	int64_t	begin_time,
		double	rate,
		int	times,
		bool	force_to_play = `false`
	)

pure virtual

Seeks playback to begin_time and applies updated rate and loop settings.

参数

begin_time	Target recording timestamp in milliseconds.
rate	New playback speed multiplier.
times	Loop count to apply after the seek.
force_to_play	When true, transitions to `kPlaying` even if currently paused.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ match_playback_url_filter()

bool vlink::BagReader::match_playback_url_filter	(	std::string_view	input_url,
		const std::unordered_set< std::string > &	filter_urls
	)		const

protected

◆ open_cursor() [1/2]

bool vlink::BagReader::open_cursor ( )

Opens (or rewinds) a full, unfiltered sequential read cursor over the bag.

Convenience overload equivalent to open_cursor() with a default Config: every stored frame is visited in recorded order.

返回: true when the cursor is positioned and ready, false on open failure (sets fail()).

◆ open_cursor() [2/2]

bool vlink::BagReader::open_cursor ( const Config & config )

Opens (or rewinds) a synchronous sequential read cursor over the bag.

The cursor is an alternative to the timed play() / register_output_callback() path: it walks every stored frame in recorded order and hands them back one at a time through read_next() / operator>>, with no inter-frame delay, no loop thread and independent of any async_run() / play() session (a dedicated backend statement / iterator is used). Only Config::filter_urls and the Config::begin_time / Config::end_time window are honoured; rate, times and the auto_* / skip_blank flags are ignored. Any bound BagPluginInterface URL remap and URL exclusions still apply, but the plugin's on_read() interception (which is playback-only) does not run.

Calling it again rewinds the cursor and re-applies config, clearing the eof() / fail() state. read_next() and operator>> open a default (full, unfiltered) cursor automatically on first use, so an explicit call is only needed to apply a filter or seek window.

参数

config Cursor filter and time window (rate / loop / auto flags are ignored).

返回: true when the cursor is positioned and ready, false on open failure (sets fail()).

注解: The cursor is single-threaded; do not drive it concurrently with an active play() session on the same reader.

◆ operator bool()

vlink::BagReader::operator bool ( ) const

explicitnoexcept

Reports whether the cursor is still in a readable state (not at end, not failed).

Returns true while a frame can still be read, so while (reader >> frame) stops at end of bag or on error.

◆ operator>>()

BagReader& vlink::BagReader::operator>> ( Frame & out )

Stream-style alias for read_next(), enabling while (reader >> frame).

参数

out	Receives the next frame.

返回: Reference to *this, whose bool conversion reflects the post-read stream state.

◆ pause()

virtual void vlink::BagReader::pause ( )

pure virtual

Suspends frame dispatch while preserving the current position.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ pause_to_next()

virtual void vlink::BagReader::pause_to_next ( )

pure virtual

Emits exactly one frame from the paused position, then pauses again.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ play()

virtual void vlink::BagReader::play ( const Config & config )

pure virtual

Starts (or restarts) a play session with the supplied configuration.

Transitions the reader into kPlaying. Requires that async_run() has already been called so that the loop thread can dispatch frames.

参数

config Playback window, rate, loop count and URL filter.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ process_output()

void vlink::BagReader::process_output ( Frame & frame )

protected

◆ process_url_metas()

void vlink::BagReader::process_url_metas ( std::vector< Info::UrlMeta > & url_metas )

protected

◆ read_next()

bool vlink::BagReader::read_next ( Frame & out )

Reads the next frame in recorded order into out.

Lazily calls open_cursor() with a default Config on first use. On success out is fully populated (the same URL remap and ser_type / schema_type fill applied to playback frames); out.data is a shallow view that stays valid only until the next read_next() / operator>> call – copy it if it must outlive that.

参数

out	Receives the next frame.

返回: true when a frame was read; false at end of bag (sets eof()) or on error (sets fail()).

◆ rebuild_url_meta_lookup()

void vlink::BagReader::rebuild_url_meta_lookup ( const std::vector< Info::UrlMeta > & url_metas )

protected

◆ rebuild_url_meta_maps()

static void vlink::BagReader::rebuild_url_meta_maps	(	const std::vector< Info::UrlMeta > &	url_metas,
		std::unordered_map< std::string, std::string > &	ser_map,
		std::unordered_map< std::string, SchemaType > &	schema_type_map
	)

staticprotected

◆ register_finish_callback()

virtual void vlink::BagReader::register_finish_callback ( FinishCallback && finish_callback )

virtual

Installs the "play session ended" observer.

参数

finish_callback Function invoked at the end of a play session.

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ register_output_callback()

virtual void vlink::BagReader::register_output_callback ( OutputCallback && output_callback )

virtual

Installs the per-frame data sink.

参数

output_callback Function called for every replayed message.

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ register_ready_callback()

virtual void vlink::BagReader::register_ready_callback ( ReadyCallback && ready_callback )

virtual

Installs the "open complete" observer.

参数

ready_callback Function invoked once the bag is open and the index is parsed.

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ register_status_callback()

virtual void vlink::BagReader::register_status_callback ( StatusCallback && status_callback )

virtual

Installs a state-change observer.

参数

status_callback Function invoked with the new Status on every transition.

被 vlink::VDBReader , 以及 vlink::VCAPReader 重载.

◆ reindex()

virtual std::future<bool> vlink::BagReader::reindex ( )

pure virtual

Rebuilds backend index tables in the background where supported.

返回: Future resolving to true on success.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ resume()

virtual void vlink::BagReader::resume ( )

pure virtual

Resumes dispatch from the paused position.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ stop()

virtual void vlink::BagReader::stop ( )

pure virtual

Aborts the active session and rewinds to the start of the bag.

Drives the reader into kStopped and invokes the FinishCallback with is_interrupted set to true.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ tag()

virtual void vlink::BagReader::tag ( const std::string & tag_name )

pure virtual

Overwrites the human-readable tag stored in the bag header.

参数

tag_name New tag value.

在 vlink::VDBReader , 以及 vlink::VCAPReader 内被实现.

◆ url_schema_type_map()

std::unordered_map<std::string, SchemaType>& vlink::BagReader::url_schema_type_map ( )

protected

◆ url_ser_map()

std::unordered_map<std::string, std::string>& vlink::BagReader::url_ser_map ( )

protected

类成员变量说明

◆ kInfinite

constexpr int vlink::BagReader::kInfinite {-1}

staticconstexpr

Sentinel for Config::times that requests endless loop playback.

该类的文档由以下文件生成:

include/vlink/extension/bag_reader.h

类

Public 类型

Public 成员函数

静态 Public 成员函数

静态 Public 属性

Protected 成员函数

静态 Protected 成员函数

详细描述

成员类型定义说明

◆ FinishCallback

◆ OutputCallback

◆ ReadyCallback

◆ StatusCallback

成员枚举类型说明

◆ Status

构造及析构函数说明

◆ BagReader()

◆ ~BagReader()

成员函数说明

◆ bind_plugin_interface()

◆ check()

◆ clear_plugin_interface()

◆ convert_action()

◆ convert_playback_url()

◆ create()

◆ detach_plugin()

◆ detect_schema()

◆ do_open_cursor()

◆ do_read_next()

◆ eof()

◆ fail()

◆ fill_frame_meta()

◆ fix()

◆ flush_plugin()

◆ get_info()

◆ get_real_timestamp()

◆ get_schema_type()

◆ get_ser_type()

◆ get_split_index()

◆ get_status()

◆ get_timestamp()

◆ is_jumping()

◆ is_split_mode()

◆ jump()

◆ match_playback_url_filter()

◆ open_cursor() [1/2]

◆ open_cursor() [2/2]

◆ operator bool()

◆ operator>>()

◆ pause()

◆ pause_to_next()

◆ play()

◆ process_output()

◆ process_url_metas()

◆ read_next()

◆ rebuild_url_meta_lookup()

◆ rebuild_url_meta_maps()

◆ register_finish_callback()

◆ register_output_callback()

◆ register_ready_callback()

◆ register_status_callback()

◆ reindex()

◆ resume()

◆ stop()

◆ tag()

◆ url_schema_type_map()

◆ url_ser_map()

类成员变量说明

◆ kInfinite