#include <ctype.h>
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/log.h"
#include "avfilter.h"
#include "avfiltergraph.h"
#include "formats.h"
#include "internal.h"

Macros
#define	REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format)

#define	CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER \| AV_CH_FRONT_RIGHT_OF_CENTER)

#define	CH_FRONT_PAIR (AV_CH_FRONT_LEFT \| AV_CH_FRONT_RIGHT)

#define	CH_STEREO_PAIR (AV_CH_STEREO_LEFT \| AV_CH_STEREO_RIGHT)

#define	CH_WIDE_PAIR (AV_CH_WIDE_LEFT \| AV_CH_WIDE_RIGHT)

#define	CH_SIDE_PAIR (AV_CH_SIDE_LEFT \| AV_CH_SIDE_RIGHT)

#define	CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT \| AV_CH_SURROUND_DIRECT_RIGHT)

#define	CH_BACK_PAIR (AV_CH_BACK_LEFT \| AV_CH_BACK_RIGHT)

Functions
AVFilterGraph *	avfilter_graph_alloc (void)
	Allocate a filter graph. More...

void	avfilter_graph_free (AVFilterGraph **graph)
	Free a graph, destroy its links, and set *graph to NULL. More...

int	avfilter_graph_add_filter (AVFilterGraph graph, AVFilterContext filter)
	Add an existing filter instance to a filter graph. More...

int	avfilter_graph_create_filter (AVFilterContext *filt_ctx, AVFilter filt, const char name, const char args, void opaque, AVFilterGraph graph_ctx)
	Create and add a filter instance into an existing graph. More...

static int	graph_check_validity (AVFilterGraph graph, AVClass log_ctx)
	Check for the validity of graph. More...

static int	graph_config_links (AVFilterGraph graph, AVClass log_ctx)
	Configure all the links of graphctx. More...

AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph graph, char name)
	Get a filter instance with name name from graph. More...

static int	query_formats (AVFilterGraph graph, AVClass log_ctx)

static int	pick_format (AVFilterLink *link)

static int	reduce_formats_on_filter (AVFilterContext *filter)

static void	reduce_formats (AVFilterGraph *graph)

static void	swap_samplerates_on_filter (AVFilterContext *filter)

static void	swap_samplerates (AVFilterGraph *graph)

static void	swap_channel_layouts_on_filter (AVFilterContext *filter)

static void	swap_channel_layouts (AVFilterGraph *graph)

static void	swap_sample_fmts_on_filter (AVFilterContext *filter)

static void	swap_sample_fmts (AVFilterGraph *graph)

static int	pick_formats (AVFilterGraph *graph)

static int	graph_config_formats (AVFilterGraph graph, AVClass log_ctx)
	Configure the formats of all the links in the graph. More...

static int	graph_insert_fifos (AVFilterGraph graph, AVClass log_ctx)

int	avfilter_graph_config (AVFilterGraph graphctx, void log_ctx)
	Check validity and configure all the links and formats in the graph. More...

Variables
static const AVClass	filtergraph_class

static const uint64_t	ch_subst [][2]

Macro Definition Documentation

#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)

Definition at line 438 of file avfiltergraph.c.

#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)

Definition at line 432 of file avfiltergraph.c.

#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)

Definition at line 437 of file avfiltergraph.c.

#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)

Definition at line 433 of file avfiltergraph.c.

#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)

Definition at line 436 of file avfiltergraph.c.

#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)

Definition at line 434 of file avfiltergraph.c.

#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)

Definition at line 435 of file avfiltergraph.c.

#define REDUCE_FORMATS	(	fmt_type,
		list_type,
		list,
		var,
		nb,
		add_format
	)

Definition at line 324 of file avfiltergraph.c.

Referenced by reduce_formats_on_filter().

Function Documentation

int avfilter_graph_add_filter	(	AVFilterGraph *	graphctx,
		AVFilterContext *	filter
	)

Add an existing filter instance to a filter graph.

Parameters

graphctx	the filter graph
filter	the filter to be added

Definition at line 62 of file avfiltergraph.c.

Referenced by avfilter_graph_create_filter(), and create_filter().

AVFilterGraph* avfilter_graph_alloc ( void )

Allocate a filter graph.

Definition at line 42 of file avfiltergraph.c.

Referenced by configure_filtergraph(), and video_thread().

int avfilter_graph_config	(	AVFilterGraph *	graphctx,
		void *	log_ctx
	)

Check validity and configure all the links and formats in the graph.

Parameters

graphctx	the filter graph
log_ctx	context used for logging

Returns: 0 in case of success, a negative AVERROR code otherwise

Definition at line 699 of file avfiltergraph.c.

Referenced by configure_filtergraph(), main(), and transcode_init().

int avfilter_graph_create_filter	(	AVFilterContext **	filt_ctx,
		AVFilter *	filt,
		const char *	name,
		const char *	args,
		void *	opaque,
		AVFilterGraph *	graph_ctx
	)

Create and add a filter instance into an existing graph.

The filter instance is created from the filter filt and inited with the parameters args and opaque.

In case of success put in *filt_ctx the pointer to the created filter instance, otherwise set *filt_ctx to NULL.

Parameters

name	the instance name to give to the created filter instance
graph_ctx	the filter graph

Returns: a negative AVERROR error code in case of failure, a non negative value otherwise

Definition at line 75 of file avfiltergraph.c.

Referenced by configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), configure_output_video_filter(), graph_insert_fifos(), and query_formats().

void avfilter_graph_free ( AVFilterGraph ** graph )

Free a graph, destroy its links, and set *graph to NULL.

If *graph is NULL, do nothing.

Definition at line 51 of file avfiltergraph.c.

Referenced by configure_filtergraph(), exit_program(), and video_thread().

AVFilterContext* avfilter_graph_get_filter	(	AVFilterGraph *	graph,
		char *	name
	)

Get a filter instance with name name from graph.

Returns: the pointer to the found filter instance or NULL if it cannot be found.

Definition at line 156 of file avfiltergraph.c.

static int graph_check_validity	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

static

Check for the validity of graph.

A graph is considered valid if all its input and output pads are connected.

Returns: 0 in case of success, a negative value otherwise

Definition at line 104 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static int graph_config_formats	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

static

Configure the formats of all the links in the graph.

Definition at line 636 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static int graph_config_links	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

static

Configure all the links of graphctx.

Returns: 0 in case of success, a negative value otherwise

Definition at line 139 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static int graph_insert_fifos	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

static

Definition at line 661 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static int pick_format ( AVFilterLink * link )

static

Definition at line 286 of file avfiltergraph.c.

Referenced by pick_formats().

static int pick_formats ( AVFilterGraph * graph )

static

Definition at line 616 of file avfiltergraph.c.

Referenced by graph_config_formats().

static int query_formats	(	AVFilterGraph *	graph,
		AVClass *	log_ctx
	)

static

Definition at line 167 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void reduce_formats ( AVFilterGraph * graph )

static

Definition at line 373 of file avfiltergraph.c.

Referenced by graph_config_formats().

static int reduce_formats_on_filter ( AVFilterContext * filter )

static

Definition at line 359 of file avfiltergraph.c.

Referenced by reduce_formats().

static void swap_channel_layouts ( AVFilterGraph * graph )

static

Definition at line 539 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_channel_layouts_on_filter ( AVFilterContext * filter )

static

Definition at line 466 of file avfiltergraph.c.

Referenced by swap_channel_layouts().

static void swap_sample_fmts ( AVFilterGraph * graph )

static

Definition at line 607 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_sample_fmts_on_filter ( AVFilterContext * filter )

static

Definition at line 547 of file avfiltergraph.c.

Referenced by swap_sample_fmts().

static void swap_samplerates ( AVFilterGraph * graph )

static

Definition at line 424 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_samplerates_on_filter ( AVFilterContext * filter )

static

Definition at line 385 of file avfiltergraph.c.

Referenced by swap_samplerates().

Variable Documentation

const uint64_t ch_subst[][2]

static

Initial value:

= {
    { CH_FRONT_PAIR,      CH_CENTER_PAIR     },
    { CH_FRONT_PAIR,      CH_WIDE_PAIR       },
    { CH_FRONT_PAIR,      AV_CH_FRONT_CENTER },
    { CH_CENTER_PAIR,     CH_FRONT_PAIR      },
    { CH_CENTER_PAIR,     CH_WIDE_PAIR       },
    { CH_CENTER_PAIR,     AV_CH_FRONT_CENTER },
    { CH_WIDE_PAIR,       CH_FRONT_PAIR      },
    { CH_WIDE_PAIR,       CH_CENTER_PAIR     },
    { CH_WIDE_PAIR,       AV_CH_FRONT_CENTER },
    { AV_CH_FRONT_CENTER, CH_FRONT_PAIR      },
    { AV_CH_FRONT_CENTER, CH_CENTER_PAIR     },
    { AV_CH_FRONT_CENTER, CH_WIDE_PAIR       },
    { CH_SIDE_PAIR,       CH_DIRECT_PAIR     },
    { CH_SIDE_PAIR,       CH_BACK_PAIR       },
    { CH_SIDE_PAIR,       AV_CH_BACK_CENTER  },
    { CH_BACK_PAIR,       CH_DIRECT_PAIR     },
    { CH_BACK_PAIR,       CH_SIDE_PAIR       },
    { CH_BACK_PAIR,       AV_CH_BACK_CENTER  },
    { AV_CH_BACK_CENTER,  CH_BACK_PAIR       },
    { AV_CH_BACK_CENTER,  CH_DIRECT_PAIR     },
    { AV_CH_BACK_CENTER,  CH_SIDE_PAIR       },
}

Definition at line 442 of file avfiltergraph.c.

Referenced by swap_channel_layouts_on_filter().

const AVClass filtergraph_class

static

Initial value:

= {
    .class_name = "AVFilterGraph",
    .item_name  = av_default_item_name,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 36 of file avfiltergraph.c.

Referenced by avfilter_graph_alloc().

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation