#include <avfilter.h>
Data Fields | |
| const char * | name |
| filter name | |
| int | priv_size |
| size of private data to allocate for the filter | |
| int(* | init )(AVFilterContext *ctx, const char *args, void *opaque) |
| Filter initialization function. | |
| void(* | uninit )(AVFilterContext *ctx) |
| Filter uninitialization function. | |
| int(* | query_formats )(AVFilterContext *) |
| Queries formats/layouts supported by the filter and its pads, and sets the in_formats/in_chlayouts for links connected to its output pads, and out_formats/out_chlayouts for links connected to its input pads. | |
| const AVFilterPad * | inputs |
| NULL terminated list of inputs. NULL if none. | |
| const AVFilterPad * | outputs |
| NULL terminated list of outputs. NULL if none. | |
| const char * | description |
| A description for the filter. | |
| int(* | process_command )(AVFilterContext *, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| Make the filter instance process a command. | |
This defines the pads a filter contains, and all the callback functions used to interact with the filter.
Definition at line 527 of file avfilter.h.
| const char* AVFilter::description |
A description for the filter.
You should use the NULL_IF_CONFIG_SMALL() macro to define it.
Definition at line 564 of file avfilter.h.
| int(* AVFilter::init)(AVFilterContext *ctx, const char *args, void *opaque) |
Filter initialization function.
Args contains the user-supplied parameters. FIXME: maybe an AVOption-based system would be better? opaque is data provided by the code requesting creation of the filter, and is used to pass data to the filter.
Referenced by av_vsrc_buffer_add_video_buffer_ref(), avfilter_init_filter(), and reconfigure_filter().
| const AVFilterPad* AVFilter::inputs |
NULL terminated list of inputs. NULL if none.
Definition at line 557 of file avfilter.h.
Referenced by avfilter_open(), and main().
| const char* AVFilter::name |
filter name
Definition at line 528 of file avfilter.h.
Referenced by av_vsrc_buffer_add_video_buffer_ref(), avfilter_graph_dump_to_buf(), avfilter_graph_queue_command(), avfilter_graph_send_command(), avfilter_process_command(), avfilter_register(), ff_avfilter_graph_check_validity(), ff_dlog_link(), filter_name(), init(), lavfi_read_header(), link_filter(), link_filter_inouts(), and print_digraph().
| const AVFilterPad* AVFilter::outputs |
NULL terminated list of outputs. NULL if none.
Definition at line 558 of file avfilter.h.
Referenced by avfilter_open(), and main().
size of private data to allocate for the filter
Definition at line 530 of file avfilter.h.
Referenced by avfilter_open(), and reconfigure_filter().
| int(* AVFilter::process_command)(AVFilterContext *, const char *cmd, const char *arg, char *res, int res_len, int flags) |
Make the filter instance process a command.
| cmd | the command to process, for handling simplicity all commands must be alphanumeric only | |
| arg | the argument for the command | |
| res | a buffer with size res_size where the filter(s) can return a response. This must not change when the command is not supported. | |
| flags | if AVFILTER_CMD_FLAG_FAST is set and the command would be time consuming then a filter should treat it like an unsupported command |
Referenced by avfilter_process_command().
| int(* AVFilter::query_formats)(AVFilterContext *) |
Queries formats/layouts supported by the filter and its pads, and sets the in_formats/in_chlayouts for links connected to its output pads, and out_formats/out_chlayouts for links connected to its input pads.
Referenced by insert_conv_filter(), main(), and query_formats().
| void(* AVFilter::uninit)(AVFilterContext *ctx) |
Filter uninitialization function.
Should deallocate any memory held by the filter, release any buffer references, etc. This does not need to deallocate the AVFilterContext->priv memory itself.
Referenced by avfilter_free(), and reconfigure_filter().
1.5.8