graphparser.c File Reference

#include <string.h>
#include <stdio.h>
#include "libavutil/avstring.h"
#include "libavutil/mem.h"
#include "avfilter.h"

Go to the source code of this file.

Macros
#define	WHITESPACES   " \n\t\r"

Functions
static int	link_filter (AVFilterContext *src, int srcpad, AVFilterContext *dst, int dstpad, void *log_ctx)
	Link two filters together. More...
static char *	parse_link_name (const char **buf, void *log_ctx)
	Parse the name of a link, which has the format "[linkname]". More...
static int	create_filter (AVFilterContext **filt_ctx, AVFilterGraph *ctx, int index, const char *name, const char *args, void *log_ctx)
	Create an instance of a filter, initialize and insert it in the filtergraph in *ctx. More...
static int	parse_filter (AVFilterContext **filt_ctx, const char **buf, AVFilterGraph *graph, int index, void *log_ctx)
	Parse a string of the form FILTER_NAME[=PARAMS], and create a corresponding filter instance which is added to graph with create_filter(). More...
AVFilterInOut *	avfilter_inout_alloc (void)
	Allocate a single AVFilterInOut entry. More...
void	avfilter_inout_free (AVFilterInOut **inout)
	Free the supplied list of AVFilterInOut and set *inout to NULL. More...
static AVFilterInOut *	extract_inout (const char *label, AVFilterInOut **links)
static void	insert_inout (AVFilterInOut **inouts, AVFilterInOut *element)
static void	append_inout (AVFilterInOut **inouts, AVFilterInOut **element)
static int	link_filter_inouts (AVFilterContext *filt_ctx, AVFilterInOut **curr_inputs, AVFilterInOut **open_inputs, void *log_ctx)
static int	parse_inputs (const char **buf, AVFilterInOut **curr_inputs, AVFilterInOut **open_outputs, void *log_ctx)
static int	parse_outputs (const char **buf, AVFilterInOut **curr_inputs, AVFilterInOut **open_inputs, AVFilterInOut **open_outputs, void *log_ctx)
static int	parse_sws_flags (const char **buf, AVFilterGraph *graph)
int	avfilter_graph_parse2 (AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs)
	Add a graph described by a string to a graph. More...
int	avfilter_graph_parse (AVFilterGraph *graph, const char *filters, AVFilterInOut *open_inputs, AVFilterInOut *open_outputs, void *log_ctx)
	Add a graph described by a string to a graph. More...
int	avfilter_graph_parse_ptr (AVFilterGraph *graph, const char *filters, AVFilterInOut **open_inputs_ptr, AVFilterInOut **open_outputs_ptr, void *log_ctx)
	Add a graph described by a string to a graph. More...

Macro Definition Documentation

WHITESPACES

#define WHITESPACES   " \n\t\r"

Definition at line 30 of file graphparser.c.

Function Documentation

link_filter()

static int link_filter ( AVFilterContext *  src, int  srcpad, AVFilterContext *  dst, int  dstpad, void *  log_ctx  )

static

Link two filters together.

See also

avfilter_link()

Definition at line 37 of file graphparser.c.

Referenced by link_filter_inouts(), and parse_outputs().

parse_link_name()

static char* parse_link_name ( const char **  buf, void *  log_ctx  )

static

Parse the name of a link, which has the format "[linkname]".

Returns

a pointer (that need to be freed after use) to the name between parenthesis

Definition at line 58 of file graphparser.c.

Referenced by parse_inputs(), and parse_outputs().

create_filter()

static int create_filter ( AVFilterContext **  filt_ctx, AVFilterGraph *  ctx, int  index, const char *  name, const char *  args, void *  log_ctx  )

static

Create an instance of a filter, initialize and insert it in the filtergraph in *ctx.

Parameters

filt_ctx	put here a filter context in case of successful creation and configuration, NULL otherwise.
ctx	the filtergraph context
index	an index which is supposed to be unique for each filter instance added to the filtergraph
name	the name of the filter to create, can be filter name or filter_name@id as instance name
args	the arguments provided to the filter during its initialization
log_ctx	the log context to use

Returns

>= 0 in case of success, a negative AVERROR code otherwise

Definition at line 96 of file graphparser.c.

Referenced by parse_filter().

parse_filter()

static int parse_filter ( AVFilterContext **  filt_ctx, const char **  buf, AVFilterGraph *  graph, int  index, void *  log_ctx  )

static

Parse a string of the form FILTER_NAME[=PARAMS], and create a corresponding filter instance which is added to graph with create_filter().

Parameters

filt_ctx	Pointer that is set to the created and configured filter context on success, set to NULL on failure.
filt_ctx	put here a pointer to the created filter context on success, NULL otherwise
buf	pointer to the buffer to parse, *buf will be updated to point to the char next after the parsed string
index	an index which is assigned to the created filter instance, and which is supposed to be unique for each filter instance added to the filtergraph

Returns

>= 0 in case of success, a negative AVERROR code otherwise

Definition at line 180 of file graphparser.c.

Referenced by avfilter_graph_parse2(), and avfilter_graph_parse_ptr().

extract_inout()

static AVFilterInOut* extract_inout ( const char *  label, AVFilterInOut **  links  )

static

Definition at line 213 of file graphparser.c.

Referenced by avfilter_graph_parse(), parse_inputs(), and parse_outputs().

insert_inout()

static void insert_inout ( AVFilterInOut **  inouts, AVFilterInOut *  element  )

static

Definition at line 230 of file graphparser.c.

Referenced by link_filter_inouts(), and parse_outputs().

append_inout()

static void append_inout ( AVFilterInOut **  inouts, AVFilterInOut **  element  )

static

Definition at line 236 of file graphparser.c.

Referenced by avfilter_graph_parse2(), link_filter_inouts(), and parse_inputs().

link_filter_inouts()

static int link_filter_inouts ( AVFilterContext *  filt_ctx, AVFilterInOut **  curr_inputs, AVFilterInOut **  open_inputs, void *  log_ctx  )

static

Definition at line 248 of file graphparser.c.

Referenced by avfilter_graph_parse2(), and avfilter_graph_parse_ptr().

parse_inputs()

static int parse_inputs ( const char **  buf, AVFilterInOut **  curr_inputs, AVFilterInOut **  open_outputs, void *  log_ctx  )

static

Definition at line 296 of file graphparser.c.

Referenced by avfilter_graph_parse2(), and avfilter_graph_parse_ptr().

parse_outputs()

static int parse_outputs ( const char **  buf, AVFilterInOut **  curr_inputs, AVFilterInOut **  open_inputs, AVFilterInOut **  open_outputs, void *  log_ctx  )

static

Definition at line 336 of file graphparser.c.

Referenced by avfilter_graph_parse2(), and avfilter_graph_parse_ptr().

parse_sws_flags()

static int parse_sws_flags ( const char **  buf, AVFilterGraph *  graph  )

static

Definition at line 384 of file graphparser.c.

Referenced by avfilter_graph_parse2(), and avfilter_graph_parse_ptr().