Database of all installed plugins. More...

Modules
	Defaults saved between sessions
	Plugin defaults.

Data Structures
struct	bg_plugin_info_s
	Information about a plugin. More...
struct	bg_plugin_registry_options_t
	Creation options for a plugin registry. More...
struct	bg_plugin_handle_s
	Handle of a loaded plugin. More...

Typedefs
typedef struct bg_plugin_info_s	bg_plugin_info_t
	Typedef for plugin info.
typedef struct bg_plugin_registry_s	bg_plugin_registry_t
	Opaque handle for a plugin registry.
typedef struct bg_plugin_handle_s	bg_plugin_handle_t
	Typedef for plugin handle.

Enumerations
enum	bg_plugin_api_t { BG_PLUGIN_API_GMERLIN = 0, BG_PLUGIN_API_LADSPA, BG_PLUGIN_API_LV, BG_PLUGIN_API_FREI0R }
	Identifiers for plugin APIs. More...
enum	bg_stream_type_t { BG_STREAM_AUDIO = (1<<0), BG_STREAM_SUBTITLE_TEXT = (1<<1), BG_STREAM_SUBTITLE_OVERLAY = (1<<2), BG_STREAM_VIDEO = (1<<3) }
	Identifiers for stream types. More...

Functions
bg_plugin_registry_t *	bg_plugin_registry_create (bg_cfg_section_t *section)
	Create a plugin registry.
bg_plugin_registry_t *	bg_plugin_registry_create_with_options (bg_cfg_section_t section, const bg_plugin_registry_options_t opt)
	Create a plugin registry with options.
void	bg_plugin_registry_scan_devices (bg_plugin_registry_t *plugin_reg, uint32_t type_mask, uint32_t flag_mask)
	Scan for pluggable devices.
void	bg_plugin_registry_destroy (bg_plugin_registry_t *reg)
	Destroy a plugin registry.
int	bg_plugin_registry_get_num_plugins (bg_plugin_registry_t *reg, uint32_t type_mask, uint32_t flag_mask)
	Count plugins.
const bg_plugin_info_t *	bg_plugin_find_by_index (bg_plugin_registry_t *reg, int index, uint32_t type_mask, uint32_t flag_mask)
	Find a plugin by index.
const bg_plugin_info_t *	bg_plugin_find_by_name (bg_plugin_registry_t reg, const char name)
	Find a plugin by it's unique short name.
const bg_plugin_info_t *	bg_plugin_find_by_filename (bg_plugin_registry_t reg, const char filename, int type_mask)
	Find a plugin by the file extension.
const bg_plugin_info_t *	bg_plugin_find_by_protocol (bg_plugin_registry_t reg, const char protocol)
	Find an input plugin for a network protocol.
char **	bg_plugin_registry_get_plugins (bg_plugin_registry_t *reg, uint32_t type_mask, uint32_t flag_mask)
	Get a list of plugins.
void	bg_plugin_registry_free_plugins (char **plugins)
	Free a plugin list.
int	bg_input_plugin_load (bg_plugin_registry_t reg, const char location, const bg_plugin_info_t info, bg_plugin_handle_t ret, bg_input_callbacks_t callbacks, int prefer_edl)
	Load and open an input plugin.
int	bg_input_plugin_load_edl (bg_plugin_registry_t reg, const bg_edl_t edl, const bg_plugin_info_t info, bg_plugin_handle_t ret, bg_input_callbacks_t callbacks)
	Load and open an edl decoder.
void	bg_plugin_registry_set_extensions (bg_plugin_registry_t reg, const char plugin_name, const char *extensions)
	Set file extensions for a plugin.
void	bg_plugin_registry_set_protocols (bg_plugin_registry_t reg, const char plugin_name, const char *protocols)
	Set protocols for a plugin.
void	bg_plugin_registry_set_priority (bg_plugin_registry_t reg, const char plugin_name, int priority)
	Set priority for a plugin.
bg_cfg_section_t *	bg_plugin_registry_get_section (bg_plugin_registry_t reg, const char plugin_name)
	Get the config section belonging to a plugin.
void	bg_plugin_registry_set_parameter_info (bg_plugin_registry_t reg, uint32_t type_mask, uint32_t flag_mask, bg_parameter_info_t ret)
	Set a parameter info for selecting and configuring plugins.
void	bg_plugin_registry_set_parameter_info_input (bg_plugin_registry_t reg, uint32_t type_mask, uint32_t flag_mask, bg_parameter_info_t ret)
	Set a parameter info for selecting and configuring input plugins.
void	bg_plugin_registry_set_parameter_input (void data, const char name, const bg_parameter_value_t *val)
	Set a parameter of an input plugin.
bg_parameter_info_t *	bg_plugin_registry_create_encoder_parameters (bg_plugin_registry_t *reg, uint32_t stream_type_mask, uint32_t flag_mask)
	Create a parameter array for encoders.
const char *	bg_encoder_section_get_plugin (bg_plugin_registry_t plugin_reg, bg_cfg_section_t s, bg_stream_type_t stream_type, int stream_mask)
	Get the name for an encoding plugin.
void	bg_encoder_section_get_plugin_config (bg_plugin_registry_t plugin_reg, bg_cfg_section_t s, bg_stream_type_t stream_type, int stream_mask, bg_cfg_section_t section_ret, const bg_parameter_info_t params_ret)
	Get the plugin configuration for an encoding plugin.
void	bg_encoder_section_get_stream_config (bg_plugin_registry_t plugin_reg, bg_cfg_section_t s, bg_stream_type_t stream_type, int stream_mask, bg_cfg_section_t section_ret, const bg_parameter_info_t params_ret)
	Get the stream configuration for an encoding plugin.
bg_cfg_section_t *	bg_encoder_section_get_from_registry (bg_plugin_registry_t plugin_reg, const bg_parameter_info_t parameters, uint32_t type_mask, uint32_t flag_mask)
	Get an encoder configuration section from a registry.
void	bg_encoder_section_store_in_registry (bg_plugin_registry_t plugin_reg, bg_cfg_section_t s, const bg_parameter_info_t *parameters, uint32_t type_mask, uint32_t flag_mask)
	Store an encoder configuration in a registry.
void	bg_plugin_registry_add_device (bg_plugin_registry_t reg, const char plugin_name, const char device, const char name)
	Add a device to a plugin.
void	bg_plugin_registry_set_device_name (bg_plugin_registry_t reg, const char plugin_name, const char device, const char name)
	Change the name of a device.
void	bg_plugin_registry_find_devices (bg_plugin_registry_t reg, const char plugin_name)
	Let a plugin rescan for devices.
void	bg_plugin_registry_remove_device (bg_plugin_registry_t reg, const char plugin_name, const char device, const char name)
	Remove a device.
gavl_video_frame_t *	bg_plugin_registry_load_image (bg_plugin_registry_t reg, const char filename, gavl_video_format_t format, gavl_metadata_t m)
	Load an image.
void	bg_plugin_registry_save_image (bg_plugin_registry_t reg, const char filename, gavl_video_frame_t frame, const gavl_video_format_t format, const gavl_metadata_t *m)
	Save an image.
bg_plugin_handle_t *	bg_plugin_load (bg_plugin_registry_t reg, const bg_plugin_info_t info)
	Load a plugin.
bg_plugin_handle_t *	bg_ov_plugin_load (bg_plugin_registry_t reg, const bg_plugin_info_t info, const char *window_id)
	Load a video output plugin.
void	bg_plugin_lock (bg_plugin_handle_t *h)
	Lock a plugin.
void	bg_plugin_unlock (bg_plugin_handle_t *h)
	Unlock a plugin.
void	bg_plugin_ref (bg_plugin_handle_t *h)
	Increase the reference count.
void	bg_plugin_unref (bg_plugin_handle_t *h)
	Decrease the reference count.
void	bg_plugin_unref_nolock (bg_plugin_handle_t *h)
	Decrease the reference count without locking.
bg_plugin_info_t *	bg_plugin_info_create (const bg_plugin_common_t *plugin)
	Create a plugin info from a plugin.
bg_plugin_handle_t *	bg_plugin_handle_create ()
	Create an empty plugin handle.

Detailed Description

Database of all installed plugins.

The plugin registry keeps informations about all installed plugins. Furthermore, it manages default plugins and some other settings. Available plugins are cached in the file $HOME/.gmerlin/plugins.xml, which is used by all applications. Application specific data are stored in a bg_cfg_section_t.

It allows you to search for plugins according to certain criteria. You get detailed information about plugins in bg_plugin_info_t structs.

Typedef Documentation

typedef struct bg_plugin_info_s bg_plugin_info_t

Typedef for plugin info.

typedef struct bg_plugin_registry_s bg_plugin_registry_t

Opaque handle for a plugin registry.

You don't want to know, what's inside here.

typedef struct bg_plugin_handle_s bg_plugin_handle_t

Typedef for plugin handle.

Enumeration Type Documentation

enum bg_plugin_api_t

Identifiers for plugin APIs.

Enumerator:

BG_PLUGIN_API_GMERLIN	Always 0 so native plugins can leave this empty.
BG_PLUGIN_API_LADSPA	Ladspa API.
BG_PLUGIN_API_LV	Libvisual.
BG_PLUGIN_API_FREI0R	frei0r

enum bg_stream_type_t

Identifiers for stream types.

Function Documentation

bg_plugin_registry_t* bg_plugin_registry_create ( bg_cfg_section_t * section )

Create a plugin registry.

Parameters

section A configuration section

The configuration section will be owned exclusively by the plugin registry, applications should not touch it.

bg_plugin_registry_t* bg_plugin_registry_create_with_options	(	bg_cfg_section_t *	section,
		const bg_plugin_registry_options_t *	opt
	)

Create a plugin registry with options.

Parameters

section	A configuration section
opt	The options structure

The configuration section will be owned exclusively by the plugin registry, applications should not touch it.

void bg_plugin_registry_scan_devices	(	bg_plugin_registry_t *	plugin_reg,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Scan for pluggable devices.

Parameters

plugin_reg	A plugin registry
type_mask	Mask of all types you want to have the devices scanned for
flag_mask	Mask of all flags you want to have the devices scanned for

Some plugins offer a list of supported devices as parameters. To update these (e.g. if pluggable devices are among them), call this function right after you created the plugin registry

void bg_plugin_registry_destroy ( bg_plugin_registry_t * reg )

Destroy a plugin registry.

Parameters

reg	A plugin registry

int bg_plugin_registry_get_num_plugins	(	bg_plugin_registry_t *	reg,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Count plugins.

Parameters

reg	A plugin registry
type_mask	Mask of all types you want to have
flag_mask	Mask of all flags you want to have

Returns: Number of available plugins matching type_mask and flag_mask

const bg_plugin_info_t* bg_plugin_find_by_index	(	bg_plugin_registry_t *	reg,
		int	index,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Find a plugin by index.

Parameters

reg	A plugin registry
index	Index
type_mask	Mask of all types you want to have
flag_mask	Mask of all flags you want to have

Returns: A plugin info or NULL

This function should be called after bg_plugin_registry_get_num_plugins to get a particular plugin

const bg_plugin_info_t* bg_plugin_find_by_name	(	bg_plugin_registry_t *	reg,
		const char *	name
	)

Find a plugin by it's unique short name.

Parameters

reg	A plugin registry
name	The name

Returns: A plugin info or NULL

const bg_plugin_info_t* bg_plugin_find_by_filename	(	bg_plugin_registry_t *	reg,
		const char *	filename,
		int	type_mask
	)

Find a plugin by the file extension.

Parameters

reg	A plugin registry
filename	The file, whose extension should match
type_mask	Mask of plugin types to be returned

Returns: A plugin info or NULL

This function returns the first plugin matching type_mask, whose extensions match filename.

const bg_plugin_info_t* bg_plugin_find_by_protocol	(	bg_plugin_registry_t *	reg,
		const char *	protocol
	)

Find an input plugin for a network protocol.

Parameters

reg	A plugin registry
protocol	The network protocol (e.g. http)

Returns: A plugin info or NULL

char** bg_plugin_registry_get_plugins	(	bg_plugin_registry_t *	reg,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Get a list of plugins.

Parameters

reg	A plugin registry
type_mask	Mask of all returned plugin types
flag_mask	Mask of all returned plugin flags

Returns: A NULL-terminated list of plugin names.

This functions returns plugin names suitable for adding to GUI menus. Use bg_plugin_find_by_name to get the corresponding plugin infos.

Use bg_plugin_registry_free_plugins to free the returned list.

void bg_plugin_registry_free_plugins ( char ** plugins )

Free a plugin list.

Parameters

plugins List returned by bg_plugin_registry_get_plugins

int bg_input_plugin_load	(	bg_plugin_registry_t *	reg,
		const char *	location,
		const bg_plugin_info_t *	info,
		bg_plugin_handle_t **	ret,
		bg_input_callbacks_t *	callbacks,
		int	prefer_edl
	)

Load and open an input plugin.

Parameters

reg	A plugin registry
location	Filename or URL
info	Plugin to use (can be NULL for autodetection)
ret	Will return the plugin handle.
callbacks	Input callbacks (only for authentication)
prefer_edl	If 1 EDLs are preferred over raw streams

Returns: 1 on success, 0 on error.

This is a convenience function to load an input file. If info is NULL, the plugin will be autodetected. The handle is stored in ret. If ret is non-null before the call, the old plugin will be unrefed.

int bg_input_plugin_load_edl	(	bg_plugin_registry_t *	reg,
		const bg_edl_t *	edl,
		const bg_plugin_info_t *	info,
		bg_plugin_handle_t **	ret,
		bg_input_callbacks_t *	callbacks
	)

Load and open an edl decoder.

Parameters

reg	A plugin registry
edl	The edl to open
info	Plugin to use (can be NULL for autodetection)
ret	Will return the plugin handle.
callbacks	Input callbacks (only for authentication)

Returns: 1 on success, 0 on error.

This is a convenience function to load an input file. If info is NULL, the plugin will be autodetected. The handle is stored in ret. If ret is non-null before the call, the old plugin will be unrefed.

void bg_plugin_registry_set_extensions	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		const char *	extensions
	)

Set file extensions for a plugin.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
extensions	Space separated list of file extensions

The extensions will be saved in the plugin file

void bg_plugin_registry_set_protocols	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		const char *	protocols
	)

Set protocols for a plugin.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
protocols	Space separated list of protocols

The protocols will be saved in the plugin file

void bg_plugin_registry_set_priority	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		int	priority
	)

Set priority for a plugin.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
priority	Priority (BG_PLUGIN_PRIORITY_MIN..BG_PLUGIN_PRIORITY_MAX, should be 1..10)

The priority will be saved in the plugin file

bg_cfg_section_t* bg_plugin_registry_get_section	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name
	)

Get the config section belonging to a plugin.

Parameters

reg	A plugin registry
plugin_name	Short name of the plugin

Returns: The config section belonging to the plugin or NULL

void bg_plugin_registry_set_parameter_info	(	bg_plugin_registry_t *	reg,
		uint32_t	type_mask,
		uint32_t	flag_mask,
		bg_parameter_info_t *	ret
	)

Set a parameter info for selecting and configuring plugins.

Parameters

reg	A plugin registry
type_mask	Mask of all returned types
flag_mask	Mask of all returned flags
ret	Where the parameter info will be copied

void bg_plugin_registry_set_parameter_info_input	(	bg_plugin_registry_t *	reg,
		uint32_t	type_mask,
		uint32_t	flag_mask,
		bg_parameter_info_t *	ret
	)

Set a parameter info for selecting and configuring input plugins.

Parameters

reg	A plugin registry
type_mask	Mask of all returned types
flag_mask	Mask of all returned flags
ret	Where the parameter info will be copied

void bg_plugin_registry_set_parameter_input	(	void *	data,
		const char *	name,
		const bg_parameter_value_t *	val
	)

Set a parameter of an input plugin.

Parameters

data	A plugin registry cast to void
name	Name
val	Value

bg_parameter_info_t* bg_plugin_registry_create_encoder_parameters	(	bg_plugin_registry_t *	reg,
		uint32_t	stream_type_mask,
		uint32_t	flag_mask
	)

Create a parameter array for encoders.

Parameters

reg	A plugin registry
stream_type_mask	Mask of all stream types to be encoded
flag_mask	Mask of all returned plugin flags

Returns: Parameter array for setting up encoders

Free the returned parameters with bg_parameter_info_destroy_array

If you create a config section from the returned parameters (with bg_cfg_section_create_from_parameters or bg_cfg_section_create_items) the resulting encoding section will contain the complete encoder setup. It can be manipulated through the bg_encoder_section_*() functions.

const char* bg_encoder_section_get_plugin	(	bg_plugin_registry_t *	plugin_reg,
		bg_cfg_section_t *	s,
		bg_stream_type_t	stream_type,
		int	stream_mask
	)

Get the name for an encoding plugin.

Parameters

plugin_reg	A plugin registry
s	An encoder section (see bg_plugin_registry_create_encoder_parameters)
stream_type	The stream type to encode
stream_mask	The mask passed to bg_plugin_registry_create_encoder_parameters

Returns: Returns the plugin name or NULL if the stream will be encoded by the video encoder

void bg_encoder_section_get_plugin_config	(	bg_plugin_registry_t *	plugin_reg,
		bg_cfg_section_t *	s,
		bg_stream_type_t	stream_type,
		int	stream_mask,
		bg_cfg_section_t **	section_ret,
		const bg_parameter_info_t **	params_ret
	)

Get the plugin configuration for an encoding plugin.

Parameters

plugin_reg	A plugin registry
s	An encoder section (see bg_plugin_registry_create_encoder_parameters)
stream_type	The stream type to encode
stream_mask	The mask passed to bg_plugin_registry_create_encoder_parameters
section_ret	If non-null returns the config section for the plugin
params_ret	If non-null returns the parameters for the plugin

void bg_encoder_section_get_stream_config	(	bg_plugin_registry_t *	plugin_reg,
		bg_cfg_section_t *	s,
		bg_stream_type_t	stream_type,
		int	stream_mask,
		bg_cfg_section_t **	section_ret,
		const bg_parameter_info_t **	params_ret
	)

Get the stream configuration for an encoding plugin.

Parameters

plugin_reg	A plugin registry
s	An encoder section (see bg_plugin_registry_create_encoder_parameters)
stream_type	The stream type to encode
stream_mask	The mask passed to bg_plugin_registry_create_encoder_parameters
section_ret	If non-null returns the config section for the stream
params_ret	If non-null returns the parameters for the stream

bg_cfg_section_t* bg_encoder_section_get_from_registry	(	bg_plugin_registry_t *	plugin_reg,
		const bg_parameter_info_t *	parameters,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Get an encoder configuration section from a registry.

Parameters

plugin_reg	A plugin registry
parameters	Parameters returned by bg_plugin_registry_create_encoder_parameters
type_mask	The stream mask passed to bg_plugin_registry_create_encoder_parameters
flag_mask	The mask passed to bg_plugin_registry_create_encoder_parameters

Returns: The encoder section with the values from the registry

void bg_encoder_section_store_in_registry	(	bg_plugin_registry_t *	plugin_reg,
		bg_cfg_section_t *	s,
		const bg_parameter_info_t *	parameters,
		uint32_t	type_mask,
		uint32_t	flag_mask
	)

Store an encoder configuration in a registry.

Parameters

plugin_reg	A plugin registry
s	The encoder section to store
parameters	Parameters returned by bg_plugin_registry_create_encoder_parameters
type_mask	The stream mask passed to bg_plugin_registry_create_encoder_parameters
flag_mask	The mask passed to bg_plugin_registry_create_encoder_parameters

Returns: The encoder section with the values from the registry

void bg_plugin_registry_add_device	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		const char *	device,
		const char *	name
	)

Add a device to a plugin.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
device	Device file
name	Name for the device

void bg_plugin_registry_set_device_name	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		const char *	device,
		const char *	name
	)

Change the name of a device.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
device	Device file name
name	New name for the device

Usually, plugins are quite smart in getting the name (Vendor, Model etc) of devices from the OS. In the case, you want to change names of a device use this function

void bg_plugin_registry_find_devices	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name
	)

Let a plugin rescan for devices.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin

This will let the plugin rescan for devices. Call this, after you changed your hardware.

void bg_plugin_registry_remove_device	(	bg_plugin_registry_t *	reg,
		const char *	plugin_name,
		const char *	device,
		const char *	name
	)

Remove a device.

Parameters

reg	A plugin registry
plugin_name	Name of the plugin
device	Device file name
name	New name for the device

Remove a device from the list of devices. Call this if a plugin detected a device multiple times.

gavl_video_frame_t* bg_plugin_registry_load_image	(	bg_plugin_registry_t *	reg,
		const char *	filename,
		gavl_video_format_t *	format,
		gavl_metadata_t *	m
	)

Load an image.

Parameters

reg	A plugin registry
filename	Image filename
format	Returns format of the image
m	Returns metadata

Returns: The frame, which contains the image

Use gavl_video_frame_destroy to free the return value

void bg_plugin_registry_save_image	(	bg_plugin_registry_t *	reg,
		const char *	filename,
		gavl_video_frame_t *	frame,
		const gavl_video_format_t *	format,
		const gavl_metadata_t *	m
	)

Save an image.

Parameters

reg	A plugin registry
filename	Image filename
frame	The frame, which contains the image
format	Returns format of the image
m	Metadata

bg_plugin_handle_t* bg_plugin_load	(	bg_plugin_registry_t *	reg,
		const bg_plugin_info_t *	info
	)

Load a plugin.

Parameters

reg	A plugin registry
info	The plugin info

Load a plugin and return handle with reference count of 1

bg_plugin_handle_t* bg_ov_plugin_load	(	bg_plugin_registry_t *	reg,
		const bg_plugin_info_t *	info,
		const char *	window_id
	)

Load a video output plugin.

Parameters

reg	A plugin registry
info	The plugin info
window_id	The window ID or NULL

Load a video output plugin for embedding into an already existing window and return handle with reference count of 1

void bg_plugin_lock ( bg_plugin_handle_t * h )

Lock a plugin.

Parameters

h	A plugin handle

void bg_plugin_unlock ( bg_plugin_handle_t * h )

Unlock a plugin.

Parameters

h	A plugin handle

void bg_plugin_ref ( bg_plugin_handle_t * h )

Increase the reference count.

Parameters

h	A plugin handle

void bg_plugin_unref ( bg_plugin_handle_t * h )

Decrease the reference count.

Parameters

h	A plugin handle

If the reference count gets zero, the plugin will be destroyed

void bg_plugin_unref_nolock ( bg_plugin_handle_t * h )

Decrease the reference count without locking.

Parameters

h	A plugin handle

Use this only if you know for sure, that the plugin is already locked and no other thread waits for the plugin to be unlocked. If the reference count gets zero, the plugin will be destroyed

bg_plugin_info_t* bg_plugin_info_create ( const bg_plugin_common_t * plugin )

Create a plugin info from a plugin.

Parameters

plugin A plugin

Returns: A newly allocated plugin info

This is used by internal plugins only.

bg_plugin_handle_t* bg_plugin_handle_create ( )

Create an empty plugin handle.

Returns: A newly allocated plugin handle

Use this function only if you create a plugin handle outside a plugin registry. Free the returned info with bg_plugin_unref

Modules

Data Structures

Typedefs

Enumerations

Functions

Detailed Description

Typedef Documentation

Enumeration Type Documentation

Function Documentation