/*
\file
\brief silence !
*/

typedef char *DOMString;

/*!

\defgroup jsf_grp JS Filter API
\ingroup jsapi_grp
\brief JavaScript API for filters.

This section documents the JavaScript API used when developing JavaScript-based filters.
JavaScript filters support all tools from native filters, see \ref filters_grp.

Errors are handled through exceptions, except for callback function return values of the Filter object.

@{

*/

/*! global context property containing the launch arguments*/
attribute Array args;

/*! global context property representing the one and only JSFilter object attached to the loaded filter*/
attribute JSFilter filter;

/*! global context function for printing
\param log the string to write
*/
void print(DOMString log);
/*! global context function for printing 
\param log_level the log level to use: GF_LOG_DEBUG, GF_LOG_INFO, GF_LOG_WARNING, GF_LOG_ERROR. The special value -2 means print as gf_sys_format_help without highlight, the special value -1 means print as gf_sys_format_help with hightlight of first)
\param log_str the string to write
*/
void print(long log_level, DOMString log_str);


/*!\brief JSFilter API

The JSFilter interface has a single instance exposed to the script under the name "filter".
It implements binding to the underlying filter object, see \ref GF_Filter.
The JSFilter provides callback functions mapping the functionalities of \ref __gf_filter_register.
*/
interface JSFilter {
/*! initialize the filter. This is a callback function assignable by the script. It is called once all filter arguments have been parsed.
See \ref __gf_filter_register.initialize.
\return error code if any
*/
attribute GF_Err initialize();
/*! finalize the filter. This is a callback function assignable by the script. It is called immediately before destruction of the JavaScript context.
See \ref __gf_filter_register.finalize.
\return void
*/
attribute void finalize();
/*! configures or reconfigures an input pid
See \ref __gf_filter_register.configure_pid.
\param pid pid to (re)configure
\return error code if any
*/
attribute GF_Err configure_pid(FilterPid pid);
/*! removes an input pid
See \ref __gf_filter_register.configure_pid.
\param pid pid to remove
\return error code if any
*/
attribute GF_Err remove_pid(FilterPid pid);
/*! process
See \ref __gf_filter_register.process.
\return error code if any
*/
attribute GF_Err process();
/*! process an event on a given pid
See \ref __gf_filter_register.process_event.
\param pid pid on which the event is received
\param evt event tp process
\return error code if any
*/
attribute boolean process_event(FilterPid pid, FilterEvent evt);
/*! process an event on a given pid
See \ref __gf_filter_register.process_event.
\param arg_name argument name
\param arg_val argument value
\return error code if any
*/
attribute GF_Err update_arg(DOMString arg_name, DOMString arg_val);

/*! see \ref gf_filter_get_max_extra_input_pids*/
attribute long max_pids;
/*! see \ref gf_filter_block_enabled*/
readonly attribute boolean block_enabled;
/*! see \ref gf_filter_get_output_buffer_max*/
readonly attribute unsigned long output_buffer;
/*! see \ref gf_filter_get_output_buffer_max*/
readonly attribute unsigned long output_playout;
/*! see \ref gf_filter_get_sep*/
readonly attribute DOMString sep_args;
/*! see \ref gf_filter_get_sep*/
readonly attribute DOMString sep_name;
/*! see \ref gf_filter_get_sep*/
readonly attribute DOMString sep_list;
/*! source args, only valid during initialize callback - see \ref gf_filter_get_src_args*/
readonly attribute DOMString src_args;
/*! see \ref gf_filter_get_dst_args*/
readonly attribute DOMString dst_args;
/*! see \ref gf_filter_get_dst_name*/
readonly attribute DOMString dst_name;
/*! see \ref gf_filter_all_sinks_done*/
readonly attribute boolean sinks_done;
/*! see \ref gf_filter_reporting_enabled*/
attribute boolean reports_on;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_screen_width;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_screen_height;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_screen_depth;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_screen_fps;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_screen_views;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_audio_channels;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_audio_samplerate;
/*! see \ref gf_filter_get_session_caps and \ref gf_filter_set_session_caps*/
attribute unsigned long max_audio_depth;
/*! see \ref gf_filter_get_num_events_queued*/
readonly attribute unsigned long events_queued;
/*! see \ref gf_filter_get_clock_hint*/
readonly attribute unsigned long long readonly clock_hint_us;
/*! see \ref gf_filter_get_clock_hint*/
readonly attribute unsigned long long clock_hint_mediatime;
/*! see \ref gf_filter_connections_pending*/
readonly attribute unsigned long long connections_pending;
/*! internal name - this can only be set and modified by JS API and allows for filter identification from JS*/
attribute DOMString iname;
/*! requires source ID for the filter - see \ref gf_filter_require_source_id*/
writeonly unsigned boolean require_source_id;
/*! gets JS path*/
readonly attribute DOMString jspath;


/*! sets filter description as visible when checking filter info
\param description description of filter*/
void set_desc(DOMString description);
/*! sets filter author as visible when checking filter info
\param author author of filter*/
void set_author(DOMString author);
/*! sets filter version as visible when checking filter info
\param version version of filter*/
void set_version(DOMString version);
/*! sets filter help as visible when checking filter info
\param help help of filter - can use the usual MarkDown syntax of GPAC help*/
void set_help(DOMString help);

/*! adds an argument to the filter. JavaScript Filter arguments can be specified from command line in the same way as reguar filters.
The argument is then exposed as a property of the "filter" object of the javascript context.
If the argument name is a wildcard (*), the filter will be forwarded any argument name.
\param arg object exposing the same interface as the JSArgDesc interface
*/
void set_arg(JSArgDesc arg);

/*! sets a new capability for the filter. If no argument, starts a new capability bundle.
\param cap_desc capability descriptor object
*/
void set_cap(optional JSCapDesc cap_desc = null);

/*! sets the name of the filter, used for logs
\param name the filter name
*/
void set_name(DOMString name);

/*! creates a new PID - see \ref gf_filter_pid_new
\return the new PID object
*/
FilterPid new_pid();

/*! sends an event on the filter - see \ref gf_filter_send_event
\param evt the event to send
\param upstream sends the evnet upstream
*/
void send_event(FilterEvent evt, optional boolean upstream=false);

/*! queries info on a filter
 an event on the filter - see \ref gf_filter_get_info and \ref gf_filter_get_info_str 
\param info_name the property name or ID of the info to query
\param is_string indicate if the name describes a built-in property or a user-defined property
\return the property if found, null otherwise
*/
FilterProperty get_info(DOMString info_name, optional boolean is_string = false);

/*! checks if a MIME type is supported - see \ref gf_filter_is_supported_mime
\param mime the mime type to query
\return true if supported
*/
boolean is_supported_mime(DOMString mime);

/*! update filter status string - see \ref gf_filter_update_status
\param status the status string, may be null to reset the status string
\param percent percent of processing, if known
*/
void update_status(DOMString status, optional long percent=0);

/*! reschedule filter - see \ref gf_filter_ask_rt_reschedule and \ref gf_filter_post_process_task
\param reschedule_us if not 0, reschedule the filter in the given amount of microseconds. Otherwise post a filter processing task*/
void reschedule(optional long reschedule_us=0);


/*! posts a task to the main scheduler - see \ref gf_filter_post_task
\param task_callback the callback function to use. This callback returns -1 or an exception to abort the task, or a reschedule time in milliseconds
\param task_this optional value for this object of the callback function. If not set, the filter object is used
*/
void post_task(function task_callback, optional Object task_this=null);

/*! notify a failure of the filter upon source connections - see \ref gf_filter_notification_failure, \ref gf_filter_notification_failure
\param error the error code
\param error_type the type of notification.\n
- If JSF_NOTIF_ERROR_AND_DISCONNECT, calls \ref gf_filter_notification_failure and disconnect the filter
- If JSF_NOTIF_ERROR, calls \ref gf_filter_notification_failure and does not disconnect the filter
- If JSF_SETUP_ERROR, calls \ref gf_filter_setup_failure
*/
void notify_failure(GF_Err error, optional long error_type=JSF_SETUP_ERROR);

/*! checks if a MIME type is supported - see \ref gf_filter_is_supported_mime
\param source_url the URL to check
\return true if supported
*/
boolean is_supported_source(DOMString source_url);

/*! checks if a MIME type is supported - see \ref gf_filter_hint_single_clock
\param time_in_microseconds time in microseconds
\param media_time_sec media timestamp inseconds
*/
void hint_clock(unsigned long long time_in_microseconds, double media_time_sec);

/*! sends an update to a filter - see \ref gf_filter_send_update
\param filter_id ID of the filter
\param arg_name name of the argument
\param arg_value value of the argument
\param propagate_mask propagate mask
*/
void send_update(DOMString filter_id, DOMString arg_name, DOMString arg_value, long propagate_mask);

/*! locks filter session - see \ref gf_filter_lock_all
\param do_lock if true locks filter
*/
void lock_all(boolean do_lock);

/*! locks a filter - see \ref gf_filter_lock
\param do_lock if true locks filter
*/
void lock(boolean do_lock);

/*! adds a source filter in the media session - see \ref gf_filter_connect_source
\param source URL of source to load
\param parent URL of parent, used as baseURL for the source. May be NULL
\param inherit_args if true, new filter will inherit arguments of this filter's destination
\return new loaded source filter or null
*/
FilterInstance add_source(DOMString source, optional DOMString parent = null, optional boolean inherit_args = false);

/*! adds a destination filter in the media session - see \ref gf_filter_connect_destination
\param destination URL of destination to instantiate
\param mux_mime mime identifying destination format. If not set or null, format will be guessed from URL
\return new loaded destination filter or null
*/
FilterInstance add_destination(DOMString destination, optional DOMString mux_mime=null);

/*! loads a new filter in the media session - see \ref gf_filter_load_filter
\param args name and arguments of the filter to load
\return new loaded filter or null
*/
FilterInstance add_filter(DOMString args);

/*! makes the filter sticky - see \ref gf_filter_make_sticky*/
void make_sticky();

/*! makes the filter unblocking - see \ref gf_filter_prevent_blocking
\param do_prevent if true, filter will not be blocking if all its output pids are blocking
*/
void prevent_blocking(boolean do_prevent);

/*! makes the filter prevent EOS queries - see \ref gf_filter_block_eos
\param do_block if true, filter input pids cannot be checked for end of stream during EOS queries
*/
void block_eos(boolean do_block);

/*! aborts the filter - see \ref gf_filter_abort*/
void abort();


/*! assigns source name to a filter - see \ref gf_filter_set_source
\param from a Filter or a FilterInstance object to set a a source for this filter
\param source_id the source ID to assign - empty string means no source_id
*/
void set_source(Filter from, optional DOMString source_id=null);

/*! assigns restricted source name to a filter - see \ref gf_filter_set_source_restricted
\param from a Filter or a FilterInstance object to set a a source for this filter
\param source_id the source ID to assign - empty string means no source_id
*/
void set_source_restricted(Filter from, optional DOMString source_id=null);

/*! reset source identifier for the filter - see \ref gf_filter_reset_source*/
void reset_source();

};

/*! FilterInstance wraps the set of functions available for filters loaded by the script*/
interface FilterInstance {

/*! setup failure notification. This is a callback function assignable by the script. It is when loading a source or destination filter fails asynchronously
\param e error code if any
\return void
*/
attribute void on_setup_failure(GF_Err e);

/*! sends an event on the filter - see \ref gf_filter_send_event
\param evt the event to send
*/
void send_event(FilterEvent evt);

/*! queries info on a filter
 an event on the filter - see \ref gf_filter_get_info and \ref gf_filter_get_info_str 
\param info_name the property name or ID of the info to query
\param is_string indicate if the name describes a built-in property or a user-defined property
\return the property if found, null otherwise
*/
FilterProperty get_info(DOMString info_name, optional boolean is_string = false);

/*! sends an update to a filter - see gf_filter_send_update
\param filter_id ID of the filter
\param arg_name name of the argument
\param arg_value value of the argument
\param propagate_mask propagate mask
*/
void send_update(DOMString filter_id, DOMString arg_name, DOMString arg_value, long propagate_mask);

/*! assigns source name to a filter - see \ref gf_filter_set_source
\param from a Filter or a FilterInstance object to set a a source for this filter
\param source_id the source ID to assign
*/
void set_source(Filter from, optional DOMString source_id=null);

/*! assigns restricted source name to a filter - see \ref gf_filter_set_source_restricted
\param from a Filter or a FilterInstance object to set a a source for this filter
\param source_id the source ID to assign
*/
void set_source_restricted(Filter from, optional DOMString source_id=null);

/*! removes a source filter - see \ref gf_filter_remove_src*/
void remove();

/*! checks if a filter and its connected output chain(s) have PID connection pending 
\param stop_at a Filter or a FilterInstance object indicating where to stop the analysis. If not set and the filter is a source filter, automatically set to the Filter running the script
\return true if pid connections are pending
*/
boolean has_pid_connections_pending(optional Filter stop_at=null);

/*! gets the value of a filter instance argument
\param arg_name the argument name to query
\param as_string if true, returns the value as a string, otherwise as a property object
\return the argument value as string or object, or null if no such argument*/
FilterProperty get_arg(DOMString arg_name, optional boolean as_string=false);

/*! disables data probing on the filter - see \ref gf_filter_disable_probe*/
void disable_probe();

/*! disables input on the filter - see \ref gf_filter_disable_inputs*/
void disable_inputs();

/*! reset source identifier for the filter - see \ref gf_filter_reset_source*/
void reset_source();

/*! indicates if filter is likely blocking or not - see \ref gf_filter_set_blocking
\param is_blocking if true, indicates the filter is likely to block upon process*/
void set_blocking(boolean is_blocking);

/*! filter name*/
attribute readonly DOMString name;

/*! filter type (registry name)*/
attribute readonly DOMString type;

/*! internal name - this can only be set and modified by JS API and allows for filter identification from JS*/
attribute DOMString iname;

};

/*! The FilterPid object is a binding for \ref GF_FilterPid*/
interface FilterPid {

/*! name of the PID*/
attribute DOMString name;
/*! end of stream state - see \ref gf_filter_pid_set_eos and \ref gf_filter_pid_is_eos*/
attribute boolean eos;
/*! end of stream pending state - see \ref gf_filter_pid_has_seen_eos*/
readonly attribute boolean eos_seen;
/*! end of stream pending state - see \ref gf_filter_pid_eos_received*/
readonly attribute boolean eos_received;
/*! true if end of stream is a flush event - see \ref gf_filter_pid_is_flush_eos*/
readonly attribute boolean is_flush;
/*! blocking state - see \ref gf_filter_pid_would_block*/
readonly attribute boolean would_block;
/*! sparse status - see \ref gf_filter_pid_is_sparse*/
readonly attribute boolean sparse;
/*! name of parent filter*/
readonly attribute DOMString filter_name;
/*! name of source filter*/
readonly attribute DOMString src_name;
/*! arguments of parent filter*/
readonly attribute DOMString args;
/*! argument of source filter*/
readonly attribute DOMString src_args;
/*! argument of source filter or first filter responsible for a fan-out*/
readonly attribute DOMString unicity_args;
/*! max buffer requirement of the pid - see \ref gf_filter_pid_get_max_buffer and \ref gf_filter_pid_set_max_buffer*/
attribute long max_buffer;
/*! enables loose connect of the pid - see \ref gf_filter_pid_set_loose_connect*/
writeonly boolean loose_connect;
/*! sets framin mode of the pid - see \ref gf_filter_pid_set_framing_mode*/
writeonly boolean framing;
/*! buffer duration of the pid - see \ref gf_filter_pid_query_buffer_duration*/
readonly attribute long long buffer;
/*! pid buffer full flag - see \ref gf_filter_pid_query_buffer_duration */
readonly attribute boolean full;
/*! indicates if no valid packet with data is pending - see \ref gf_filter_pid_first_packet_is_empty*/
readonly attribute boolean first_empty;
/*! CTS of the first packet in packet queue - see \ref gf_filter_pid_get_first_packet_cts*/
readonly attribute long long first_cts;
/*! number of packets in pid buffer - see \ref gf_filter_pid_get_packet_count*/
readonly attribute unsigned long nb_pck_queued;
/*! current timescale for the pid - see \ref gf_filter_pid_get_timescale */
readonly attribute unsigned long timescale;
/*! sets clock mode of pid - see \ref gf_filter_pid_set_clock_mode*/
writeonly unsigned long clock_mode;
/*! sets discard mode of pid - see \ref gf_filter_pid_set_discard*/
writeonly unsigned boolean discard;
/*! source URL of input pids*/
readonly attribute DOMString src_url;
/*! destination URL of output pids*/
readonly attribute DOMString dst_url;
/*! requires source ID for the pid - see \ref gf_filter_pid_require_source_id*/
writeonly unsigned boolean require_source_id;
/*! enables DTS recomputing on the pid - see \ref gf_filter_pid_recompute_dts*/
writeonly unsigned boolean recompute_dts;
/*! gets minimum packet duration observed on the pid - see \ref gf_filter_pid_get_min_pck_duration*/
readonly attribute unsigned long min_pck_dur;
/*! playing state - see \ref gf_filter_pid_is_playing*/
readonly attribute unsigned long playing;
/*! next estimated timestamp, or null if not computable - see \ref gf_filter_pid_get_next_ts*/
readonly attribute unsigned long long next_ts;
/*! set to true if input chain has a decoder filter - see \ref gf_filter_pid_has_decoder*/
readonly attribute boolean has_decoder;

/*! sends an event on the pid - see \ref gf_filter_pid_send_event
\param evt the event to send*/
void send_event(FilterEvent evt);

/*! enumerates properties or info on the pid - see \ref gf_filter_pid_enum_properties and \ref gf_filter_pid_enum_info
\param index the 0-based index of the property. 
\param enum_info if set, enumerates info instead of properties
\return null if no more properties to enumerate; otherwise an object:
\code
{
   DOMString name;
   unsigned long type;
   FilterProperty value;
}
\endcode

*/
Object enum_properties(unsigned long index, optional boolean enum_info=false);

/*! gets a property by name/id - see \ref gf_filter_pid_get_property and \ref gf_filter_pid_get_property_str
\param name the ID or name of the builtin property
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
\return property if found, null otherwise
*/
FilterProperty get_prop(DOMString name, optional boolean is_user=false);

/*! gets info by name/id - see \ref gf_filter_pid_get_info and \ref gf_filter_pid_get_info_str
\param name the ID or name of the builtin property
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
\return the property if found, null otherwise
*/
FilterProperty get_info(DOMString name, optional boolean is_user=false);

/*! gets first packet in pid buffer - see \ref gf_filter_pid_get_packet
\return first packet of buffer or null*/
FilterPaquet get_packet();
/*! drops first packet in pid buffer - see \ref gf_filter_pid_drop_packet
*/
void drop_packet();

/*! checks if a filter is in parent chain of pid - see \ref gf_filter_pid_is_filter_in_parents
\param filter filter to check
\return true if in parent chain*/
boolean is_filter_in_parents(GF_Filter filter);

/*! gets buffer occupancy - see \ref gf_filter_pid_get_buffer_occupancy
\param filter the Filter or FilterInstance object to check 
\return a buffer occupancy object:
\code
{
   unsigned long max_units;
   unsigned long nb_pck;
   unsigned long max_dur;
   unsigned long dur;
   boolean final_flush;
}
\endcode
*/
boolean get_buffer_occupancy(GF_Filter filter);

/*! clears EOS on pid - see \ref gf_filter_pid_clear_eos*/
void clear_eos();

/*! clears capability of pid - see \ref gf_filter_pid_check_caps
\return true if all caps are honored by the PID properties, false otherwise*/
boolean check_caps();
/*! discard blocking mode of pid - see \ref gf_filter_pid_discard_block*/
void discard_block();

/*! allow direct disatch to next filter in chain - see \ref gf_filter_pid_allow_direct_dispatch*/
void allow_direct_dispatch();

/*! resolves a file template string - see \ref gf_filter_pid_resolve_file_template
\param template the template string to resolve
\param file_idx the file index for segmented outputs
\param suffix the file suffix to append
\return the resolved template
*/
DOMString resolve_file_template(DOMString template, unsigned long file_idx, optional DOMString suffix=null);

/*! queries a capability marked for negotiation - see \ref gf_filter_pid_caps_query
\param name the ID or name of the builtin property
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
\return property if found, null otherwise*/
FilterProperty query_caps(DOMString name, optional boolean is_user);


/*! gets statistics for the pid 
\return A statistics object
\code
boolean disconnected;
unsigned long average_process_rate;
unsigned long max_process_rate;
unsigned long average_bitrate;
unsigned long max_bitrate;
unsigned long nb_processed;
unsigned long max_process_time;
unsigned long long total_process_time;
unsigned long long first_process_time;
unsigned long long last_process_time;
unsigned long min_frame_dur;
unsigned long nb_saps;
unsigned long max_sap_process_time;
unsigned long long total_sap_process_time;
unsigned long long max_buffer_time;
unsigned long long max_playout_time;
unsigned long long min_playout_time;
unsigned long long buffer_time;
unsigned long nb_buffer_units;
\endcode
*/
Object get_stats();

/*! gets clock info for the pid 
\return A clock info object:
\code
unsigned long type;
unsigned long timescale;
unsigned long long value;
\endcode
*/
Object get_clock_info();

/*! sets property on a pid - see \ref gf_filter_pid_set_property and \ref gf_filter_pid_set_property_str

\note if the name identifies the SenderNTP or ReceiverNTP properties:
- if the value is 'true', the property is set to the current NTP timestamp
- if the value is an object with properties 'n' and 'd', NTP timestamp is computed using 'n' as seconds and 'd' as fractional part

\param name the ID or name of the builtin property
\param prop the property to set. If null, removes the property.
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
*/
void set_prop(DOMString name, FilterProperty prop, optional boolean is_user=false);

/*! sets info on a pid - see \ref gf_filter_pid_set_info and \ref gf_filter_pid_set_info_str
\param name the ID or name of the builtin property
\param prop the property to set
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
*/
void set_info(DOMString name, FilterProperty prop, optional boolean is_user=false);

/*! negotiates property on an output pid - see \ref gf_filter_pid_negotiate_property and \ref gf_filter_pid_negotiate_property_str
\param name the ID or name of the builtin property
\param prop the property to set
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
*/
void negotiate_prop(DOMString name, FilterProperty prop, optional boolean is_user=false);
/*! removes an output pid - see \ref gf_filter_pid_remove*/
void remove();

/*! reset properties of a pid - see gf_filter_pid_reset_properties*/
void reset_props();

/*! copy properties of a pid - see gf_filter_pid_copy_properties*
\param from source pid
*/
void copy_props(FilterPid from);


/*! ignore this pid in blocking computations - see gf_filter_pid_ignore_blocking*
\param do_ignore if true, pid is not used in blocking mode evaluation
*/
void ignore_blocking(optional boolean do_ignore=true);

/*! creates a new output packet with no associated data
\return new packet or null*/
FilterPacket new_packet();

/*! creates a new output packet using string as payload
\param str the string to use
\param use_shared creates a shared packet, holding a GC reference to the string until release - see gf_filter_pck_new_shared
\param destroy_callback_fun when shared mode is used, specify a callback function to be used upon destruction of the packet. The function has two parameters pid (output pid of the packet destroyed) and packet (the packet destroyed)
\return new packet or null*/
FilterPacket new_packet(DOMString str, optional boolean use_shared=false, optional function destroy_callback_fun=null);

/*! creates a new output packet of the given size, zero the payload
\param size the desired size
\return new packet or null*/
FilterPacket new_packet(unsigned long size);

/*! creates a new output packet using ArrayBuffer as payload
\param ab the ArrayBuffer to use (views are also allowed)
\param use_shared creates a shared packet, holding a GC reference to the array buffer until release - see gf_filter_pck_new_shared
\param destroy_callback_fun when shared mode is used, specify a callback function to be used upon destruction of the packet. The function has two parameters pid (output pid of the packet destroyed) and packet (the packet destroyed)
\return new packet or null*/
FilterPacket new_packet(ArrayBuffer ab, optional boolean use_shared=false, optional function destroy_callback_fun=null);


/*! creates a new output packet from a source packet
\param pck the source packet to use
\param use_shared creates a shared packet - see gf_filter_pck_new_shared
\param do_copy if set, indicates that the packet shall be copied rather than cloned (\ref gf_filter_pck_new_copy) otherwise clones the packet (\ref gf_filter_pck_new_clone). Ignored if use_shared is true
\return new packet or null
*/
FilterPacket new_packet(FilterPacket pck, optional boolean use_shared=false, optional boolean do_copy=false);


/*! creates a new output packet from a source packet
\param pck the source packet to use
\param use_shared creates a shared packet - see gf_filter_pck_new_shared
\param destroy_callback_fun when shared mode is used, specify a callback function to be used upon destruction of the packet. The function has two parameters pid (output pid of the packet destroyed) and packet (the packet destroyed). Ignored if use_shared is false
\return new packet or null
*/
FilterPacket new_packet(FilterPacket pck, optional boolean use_shared=false, optional function destroy_callback_fun=null);


/*! creates a new output packet for OpenGL texture interface
\param fetch_texture_fun specify a callback function to use to fetch textures. The function has three parameters pid (output pid of the packet queried), packet (the packet queried) and plane_index (the plane/texture index). The function shall return null if error, or an object with attributes "id" (a WebGL texture or openGL texture identifier) and "fmt" (openGL texture format, e.g. GL_TEXTURE_2D).
\param destroy_callback_fun specify a callback function to be used upon destruction of the packet. The function has two parameters pid (output pid of the packet destroyed) and packet (the packet destroyed).
\param is_blocking indicates if this frame is blocking (filter cannot dispatch new frame until this frame is destroyed)
\return new packet or null
*/
FilterPacket new_packet(function fetch_texture_fun, optional function destroy_callback_fun=null, optional boolean is_blocking=false);


/*! forwards a source packet to outout - see \ref gf_filter_pck_forward
\param pck the source packet to forward
*/
void forward(FilterPacket pck);

};

/*! FilterPacket provides binding for \ref GF_FilterPacket

Packet data is made accessible through an ArrayBuffer object. This object is destroyed when truncating or expanding the data, you must get it again using pck.data.   
*/
interface FilterPacket {
/*!start flag*/
attribute boolean start;
/*!end flag*/
attribute boolean end;
/*!DTS*/
attribute signed long long dts;
/*!CTS*/
attribute signed long long cts;
/*!duration*/
attribute unsigned long dur;
/*!SAP type \ref GF_FilterSAPType*/
attribute unsigned long sap;
/*! timescale*/
attribute unsigned long timescale;
/*! interlaced flag*/
attribute boolean interlaced;
/*! corrupted flag*/
attribute boolean corrupted;
/*! seek flag*/
attribute boolean seek;
/*! byte offset in source*/
attribute signed long long byte_offset;
/*! roll distance*/
attribute unsigned long roll;
/*! crypt flag*/
attribute unsigned long crypt;
/*! clock type*/
attribute unsigned long clock_type;
/*! carousel version number*/
attribute unsigned long carousel;
/*! sequence number*/
attribute unsigned long seqnum;
/*! set if the packet is a blocking reference to a packet reference*/
attribute boolean blocking_ref;
/*! see \ref gf_filter_pck_set_dependency_flags*/
attribute unsigned long is_leading;
/*! see \ref gf_filter_pck_set_dependency_flags*/
attribute unsigned long depends_on;
/*! see \ref gf_filter_pck_set_dependency_flags*/
attribute unsigned long depended_on;
/*! see \ref gf_filter_pck_set_dependency_flags*/
attribute unsigned long redundant;
/*! size in bytes of the packet*/
readonly attribute unsigned long size;
/*! data of the packet if any
	\warning This arraybuffer will be detached whenever the packet data is modified for a destination packet
*/
readonly attribute ArrayBuffer data;

/*! set to true if data of the packet is available through a GF_FilterFrameInterface object*/
readonly attribute boolean frame_ifce;

/*! set to true if data of the packet is available through a GF_FilterFrameInterface object on openGL textures*/
readonly attribute boolean frame_ifce_gl;

/*! set to true if packet has properties other than default ones - see gf_filter_pck_has_properties*/
readonly attribute boolean has_properties;

/*! sets packet readonly - see gf_filter_pck_set_readonly*/
void set_readonly();


/*! enumerates properties of the packet

\param index the 0-based index of the property. 
\return null if no more properties to enumerate; otherwise an object:
\code
{
   DOMString name;
   unsigned long type;
   FilterProperty value;
}
\endcode

*/
Object enum_properties(unsigned long index);


/*! gets a property by name/id - see \ref gf_filter_pid_get_property and \ref gf_filter_pid_get_property_str
\param name the ID or name of the builtin property
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
\return property if found, null otherwise*/
FilterProperty get_prop(DOMString name, optional boolean is_user=false);

/*! references a filter packet reference for later usage after drop from pid buffer - see \ref gf_filter_pck_ref and \ref gf_filter_pck_ref_props
\param props_only if set, only packet properties are references, packet data is not
\return the new packet reference*/
FilterPacket ref(optional boolean props_only=false);

/*! dereferences a filter packet reference - see gf_filter_pck_unref. Throws exception if object is not a packet reference. The object is no longer a valid packet after this.*/
void unref();

/*! sends packet - gf_filter_pck_send*/
void send();

/*! discard packet - gf_filter_pck_discard*/
void discard();

/*! sets a property on packet - see \ref gf_filter_pck_set_property 
\param name the ID or name of the builtin property
\param prop the property to set. If null, removes the property.
\param is_user if set, indicates the queried property is a user-defined property rather than a built-in property
*/
void set_prop(DOMString name, FilterProperty prop, optional boolean is_user=false);

/*! appends data to packet - see \ref gf_filter_pck_expand. New data can be accessed by through the data field.
\warning any previous access to the packet data will be in detached state (no more data in the array buffer) after the call. 
\param str the string to append
\return an arraybuffer containing the corresponding appended packet data. Full packet data is available through FilterPacket.data
*/
ArrayBuffer append(DOMString str);

/*! appends data to packet - see \ref gf_filter_pck_expand. New data can be accessed by through the data field.
\warning any previous access to the packet data will be in detached state (no more data in the array buffer) after the call. 
\param size the number of bytes to append
\return an arraybuffer containing the corresponding appended packet data. Full packet data is available through FilterPacket.data
*/
ArrayBuffer append(unsigned long size);


/*! appends data to packet - see \ref gf_filter_pck_expand. New data can be accessed by through the data field.
\warning any previous access to the packet data will be in detached state (no more data in the array buffer) after the call. 
\param ab the array buffer to append
\return an arraybuffer containing the corresponding appended packet data. Full packet data is available through FilterPacket.data
*/
ArrayBuffer append(ArrayBuffer ab);

/*! truncates the packet to the indicated size - \ref gf_filter_pck_truncate
\warning any previous access to the packet data will be in detached state (no more data in the array buffer) after the call. 
\param size new packet size*/
void truncate(unsigned long size);

/*! copy properties of source packet
\param from the source packet to copy properties from
*/
void copy_props(FilterPacket from);

/*! creates a new packet cloning a source packet - see \ref gf_filter_pck_dangling_copy.

The resulting packet is in read/write mode and may have its own memory allocated.
This is typically used by sink filters wishing to access underling GPU data of a packet using frame interface.
The resulting packet can be explicitly discarded using \ref discard, otherwise will be garbage collected.

\param cached_pck if set, will be reuse for creation of new packet. This can greatly reduce memory allocations
\return the new FilterPacket or None if failure or None if failure ( if grabbing the frame into a local copy failed)
*/
void clone(optional FilterPacket cached_pck = null);

};

/*! FilterEvent expose a filter event object, either for processing a received event or triggering a new event.
The read access to the members of the structure is cross-checked with the event type and throw an error when attempting to access the wrong field 

When a field is marked as read-only, this means the event cannot be fired, it can only be received.
*/

interface FilterEvent {
/*! constructor
\param type the type of event. This type cannot be changed

\code 
let evt = new FilterEvent(GF_FEVT_PLAY);
\endcode
*/
FilterEvent(unsigned long type);

/*! event type - see GF_FilterEvent*/
attribute unsigned long type;
/*! play event - see \ref GF_FEVT_Play*/
attribute double start_range;
/*! play event - see \ref GF_FEVT_Play*/
attribute double speed;
/*! play event - see \ref GF_FEVT_Play*/
attribute boolean hw_buffer_reset;
/*! play event - see \ref GF_FEVT_Play*/
attribute boolean initial_broadcast_play;
/*! play event - see \ref GF_FEVT_Play*/
attribute boolean timestamp_based;
/*! play event - see \ref GF_FEVT_Play*/
attribute boolean full_file_only;
/*! play event - see \ref GF_FEVT_Play*/
attribute boolean forced_dash_segment_switch;
/*! play event - see \ref GF_FEVT_Play*/
attribute unsigned long from_pck;

/*! source switch and source seek - see \ref GF_FEVT_SourceSeek*/
attribute unsigned long long start_offset;
/*! source switch and source seek - see \ref GF_FEVT_SourceSeek*/
attribute unsigned long long end_offset;
/*! source switch and source seek - see \ref GF_FEVT_SourceSeek*/
attribute DOMString switch_url;
/*! source switch and source seek - see \ref GF_FEVT_SourceSeek*/
attribute boolean skip_cache_exp;
/*! source switch and source seek - see \ref GF_FEVT_SourceSeek*/
attribute unsigned long hint_block_size;

/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute DOMString seg_url;
/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute boolean is_init;
/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute unsigned long long media_start_range;
/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute unsigned long long media_end_range;
/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute unsigned long long index_start_range;
/*! segment size - see \ref GF_FEVT_SegmentSize*/
attribute unsigned long long index_end_range;

/*! quality switch - see \ref GF_FEVT_QualitySwitch*/
attribute boolean up;
/*! quality switch - see \ref GF_FEVT_QualitySwitch*/
attribute unsigned long dependent_group_index;
/*! quality switch - see \ref GF_FEVT_QualitySwitch*/
attribute long q_idx;
/*! quality switch - see \ref GF_FEVT_QualitySwitch*/
attribute unsigned long set_tile_mode_plus_one;
/*! quality switch - see \ref GF_FEVT_QualitySwitch*/
attribute unsigned long quality_degradation;

/*! visibility hint - see \ref GF_FEVT_VisibilityHint*/
attribute unsigned long min_x;
/*! visibility hint - see \ref GF_FEVT_VisibilityHint*/
attribute unsigned long min_y;
/*! visibility hint - see \ref GF_FEVT_VisibilityHint*/
attribute unsigned long max_x;
/*! visibility hint - see \ref GF_FEVT_VisibilityHint*/
attribute unsigned long max_y;
/*! visibility hint - see \ref GF_FEVT_VisibilityHint*/
attribute boolean is_gaze;

/*! buffer reqs - see \ref GF_FEVT_BufferRequirement*/
attribute unsigned long max_buffer_us;
/*! buffer reqs - see \ref GF_FEVT_BufferRequirement*/
attribute unsigned long max_playout_us;
/*! buffer reqs - see \ref GF_FEVT_BufferRequirement*/
attribute unsigned long min_playout_us;
/*! buffer reqs - see \ref GF_FEVT_BufferRequirement*/
attribute boolean pid_only;

/*! ui event type of a \ref GF_Event
only mouse and keyboard events are currently exposed
*/
attribute unsigned long ui_type;
/*! see \ref GF_EventMouse*/
attribute unsigned long mouse_x;
/*! see \ref GF_EventMouse*/
attribute unsigned long mouse_y;
/*! see \ref GF_EventMouse*/
attribute unsigned float wheel;
/*! see \ref GF_EventMouse*/
attribute unsigned long button;

/*! see \ref GF_EventKey*/
attribute unsigned long keycode;
/*! see \ref GF_EventKey*/
attribute unsigned long hwkey;

/*! array of DOMString - see \ref GF_EventOpenFile*/
attribute readonly Array dropfiles;

/*! see \ref GF_EventClipboard*/
attribute DOMString clipboard;

/*! see \ref GF_EventMultiTouch*/
attribute float mt_x;
/*! see \ref GF_EventMultiTouch*/
attribute float mt_y;
/*! see \ref GF_EventMultiTouch*/
attribute float mt_rotate;
/*! see \ref GF_EventMultiTouch*/
attribute float mt_pinch;
/*! see \ref GF_EventMultiTouch*/
attribute float mt_fingers;

/*! see \ref GF_EventSize*/
attribute unsigned long width;
/*! see \ref GF_EventSize*/
attribute unsigned long height;

/*! see \ref GF_EventShow*/
attribute unsigned long showtype;

/*! see \ref GF_EventMove*/
attribute unsigned long move_x;
/*! see \ref GF_EventMove*/
attribute unsigned long move_y;
/*! see \ref GF_EventMove*/
attribute unsigned long move_relative;
/*! see \ref GF_EventMove*/
attribute unsigned long move_alignx;
/*! see \ref GF_EventMove*/
attribute unsigned long move_aligny;

};

/*! interface used to describe filter arguments*/
interface JSArgDesc {
    /*! name of the argument*/
    attribute DOMString name;
    /*! description of the argument*/
    attribute DOMString desc;
    /*! type of the argument*/
    attribute unsigned long type;
    /*! default value of the argument*/
    optional attribute DOMString def=null;
    /*! min/max or enum values of the argument*/
    optional attribute DOMString minmax_enum=null;
    /*! argument hint type: "advanced", "expert", "hide" or null*/
    optional attribute DOMString hint=null;
};

/*! interface used to describe filter capability*/
interface JSCapDesc {
    /*! PropertyID of the capability - mandatory*/
    attribute DOMString id;
    /*! value of the property - mandatory*/
    attribute DOMString value;
    /*! input and output flag of the capability - if true, the output flag is ignored*/
    attribute boolean inout;
    /*! output flag of the capability - if undefined, the capability is an input one*/
    attribute boolean output;
    /*! excluded flag of the capability*/
    optional attribute boolean excluded=false;
    /*! loaded filter only flag of the capability*/
    optional attribute boolean loaded_filter_only=false;
    /*! static flag of the capability*/
    optional attribute boolean static=false;
    /*! optional flag of the capability*/
    optional attribute boolean optional=false;
};

/*! Properties are mapped to JavaScript values as follows:

GF_PROP_PID_CODECID: string containing the codec name\n
GF_PROP_PID_STREAM_TYPE: string containing the stream type name\n
\n
Other properties are mapped by property type:\n
GF_PROP_BOOL: boolean\n
GF_PROP_UINT: integer\n
GF_PROP_4CC: string\n
GF_PROP_SINT: integer\n
GF_PROP_LUINT: large integer\n
GF_PROP_LSINT: large integer\n
GF_PROP_FLOAT: double\n
GF_PROP_FLOAT: double\n
GF_PROP_STRING: string\n
GF_PROP_STRING_NO_COPY: string\n
GF_PROP_VEC2: object with number properties "x" and "y"\n
GF_PROP_VEC2I: object with integer properties "x" and "y"\n
GF_PROP_VEC3I: object with integer properties "x", "y" and "z"\n
GF_PROP_VEC4I: object with integer properties "x", "y", "z" and "w"\n
GF_PROP_FRACTION: object with integer properties "n" and "d", representing fraction n/d\n
GF_PROP_FRACTION64: object with large integer properties "n" and "d", representing fraction n/d\n
GF_PROP_UINT_LIST: array of integers\n
GF_PROP_4CC_LIST: array of strings\n
GF_PROP_STRING_LIST: array of strings\n
All enumeration properties (pixel format, audio format, etc): string\n
*/
typedef Object FilterProperty;


/*! @} */

