#include "config.h"
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "thread.h"

Macros
#define	OFFSET(x) offsetof(AVFilterGraph, x)

#define	FLAGS AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM

#define	MERGE_DISPATCH(field, statement)

#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
void	ff_graph_thread_free (AVFilterGraph *graph)

int	ff_graph_thread_init (AVFilterGraph *graph)

AVFilterGraph *	avfilter_graph_alloc (void)
	Allocate a filter graph.

void	ff_filter_graph_remove_filter (AVFilterGraph graph, AVFilterContext filter)
	Remove a filter from a graph;.

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

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

void	avfilter_graph_set_auto_convert (AVFilterGraph *graph, unsigned flags)
	Enable or disable automatic format conversion inside the graph.

AVFilterContext *	avfilter_graph_alloc_filter (AVFilterGraph graph, const AVFilter filter, const char *name)
	Create a new filter instance in a filter graph.

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

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

AVFilterContext *	avfilter_graph_get_filter (AVFilterGraph graph, const char name)
	Get a filter instance identified by instance name from graph.

static void	sanitize_channel_layouts (void log, AVFilterChannelLayouts l)

static int	filter_query_formats (AVFilterContext *ctx)

static int	formats_declared (AVFilterContext *f)

static AVFilterFormats *	clone_filter_formats (AVFilterFormats *arg)

static int	can_merge_formats (AVFilterFormats a_arg, AVFilterFormats b_arg, enum AVMediaType type, int is_sample_rate)

static int	query_formats (AVFilterGraph graph, AVClass log_ctx)
	Perform one round of query_formats() and merging formats lists on the filter graph.

static int	pick_format (AVFilterLink link, AVFilterLink ref)

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.

static int	ff_avfilter_graph_config_pointers (AVFilterGraph graph, AVClass log_ctx)

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.

int	avfilter_graph_send_command (AVFilterGraph graph, const char target, const char cmd, const char arg, char *res, int res_len, int flags)
	Send a command to one or more filter instances.

int	avfilter_graph_queue_command (AVFilterGraph graph, const char target, const char command, const char arg, int flags, double ts)
	Queue a command for one or more filter instances.

static void	heap_bubble_up (AVFilterGraph graph, AVFilterLink link, int index)

static void	heap_bubble_down (AVFilterGraph graph, AVFilterLink link, int index)

void	ff_avfilter_graph_update_heap (AVFilterGraph graph, AVFilterLink link)
	Update the position of a link in the age heap.

int	avfilter_graph_request_oldest (AVFilterGraph *graph)
	Request a frame on the oldest sink link.

Variables
static const AVOption	filtergraph_options []

static const AVClass	filtergraph_class

static const uint64_t	ch_subst [][2]

Macro Definition Documentation

#define OFFSET ( x ) offsetof(AVFilterGraph, x)

Definition at line 40 of file avfiltergraph.c.

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 41 of file avfiltergraph.c.

#define MERGE_DISPATCH	(	field,
		statement
	)

Value:

if (!(link->in_ ## field && link->out_ ## field)) {              \
                count_delayed++;                                             \
            } else if (link->in_ ## field == link->out_ ## field) {          \
                count_already_merged++;                                      \
            } else if (!convert_needed) {                                    \
                count_merged++;                                              \
                statement                                                    \
            }

Referenced by query_formats().

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

Definition at line 696 of file avfiltergraph.c.

Referenced by reduce_formats_on_filter().

#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)

Definition at line 840 of file avfiltergraph.c.

#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)

Definition at line 841 of file avfiltergraph.c.

#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)

Definition at line 842 of file avfiltergraph.c.

#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT)

Definition at line 843 of file avfiltergraph.c.

#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)

Definition at line 844 of file avfiltergraph.c.

#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT)

Definition at line 845 of file avfiltergraph.c.

#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)

Definition at line 846 of file avfiltergraph.c.

Function Documentation

void ff_graph_thread_free ( AVFilterGraph * graph )

Definition at line 64 of file avfiltergraph.c.

Referenced by avfilter_graph_free().

int ff_graph_thread_init ( AVFilterGraph * graph )

Definition at line 68 of file avfiltergraph.c.

Referenced by avfilter_graph_alloc_filter().

void ff_filter_graph_remove_filter	(	AVFilterGraph *	graph,
		AVFilterContext *	filter
	)

Remove a filter from a graph;.

Definition at line 94 of file avfiltergraph.c.

Referenced by avfilter_free().

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 228 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 266 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static void sanitize_channel_layouts	(	void *	log,
		AVFilterChannelLayouts *	l
	)

static

Definition at line 294 of file avfiltergraph.c.

Referenced by filter_query_formats().

static int filter_query_formats ( AVFilterContext * ctx )

static

Definition at line 309 of file avfiltergraph.c.

Referenced by query_formats().

static int formats_declared ( AVFilterContext * f )

static

Definition at line 348 of file avfiltergraph.c.

Referenced by query_formats().

static AVFilterFormats* clone_filter_formats ( AVFilterFormats * arg )

static

Definition at line 371 of file avfiltergraph.c.

Referenced by can_merge_formats().

static int can_merge_formats	(	AVFilterFormats *	a_arg,
		AVFilterFormats *	b_arg,
		enum AVMediaType	type,
		int	is_sample_rate
	)

static

Definition at line 384 of file avfiltergraph.c.

Referenced by query_formats().

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

static

Perform one round of query_formats() and merging formats lists on the filter graph.

Returns: >=0 if all links formats lists could be queried and merged; AVERROR(EAGAIN) some progress was made in the queries or merging and a later call may succeed; AVERROR(EIO) (may be changed) plus a log message if no progress was made and the negotiation is stuck; a negative error code if some other error happened

Definition at line 436 of file avfiltergraph.c.

Referenced by graph_config_formats().

static int pick_format	(	AVFilterLink *	link,
		AVFilterLink *	ref
	)

static

Definition at line 634 of file avfiltergraph.c.

Referenced by pick_formats().

static int reduce_formats_on_filter ( AVFilterContext * filter )

static

Definition at line 732 of file avfiltergraph.c.

Referenced by reduce_formats().

static void reduce_formats ( AVFilterGraph * graph )

static

Definition at line 781 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_samplerates_on_filter ( AVFilterContext * filter )

static

Definition at line 793 of file avfiltergraph.c.

Referenced by swap_samplerates().

static void swap_samplerates ( AVFilterGraph * graph )

static

Definition at line 832 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_channel_layouts_on_filter ( AVFilterContext * filter )

static

Definition at line 874 of file avfiltergraph.c.

Referenced by swap_channel_layouts().

static void swap_channel_layouts ( AVFilterGraph * graph )

static

Definition at line 963 of file avfiltergraph.c.

Referenced by graph_config_formats().

static void swap_sample_fmts_on_filter ( AVFilterContext * filter )

static

Definition at line 971 of file avfiltergraph.c.

Referenced by swap_sample_fmts().

static void swap_sample_fmts ( AVFilterGraph * graph )

static

Definition at line 1031 of file avfiltergraph.c.

Referenced by graph_config_formats().

static int pick_formats ( AVFilterGraph * graph )

static

Definition at line 1040 of file avfiltergraph.c.

Referenced by graph_config_formats().

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

static

Configure the formats of all the links in the graph.

Definition at line 1095 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

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

static

Definition at line 1122 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

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

static

Definition at line 1164 of file avfiltergraph.c.

Referenced by avfilter_graph_config().

static void heap_bubble_up	(	AVFilterGraph *	graph,
		AVFilterLink *	link,
		int	index
	)

static

Definition at line 1278 of file avfiltergraph.c.

Referenced by ff_avfilter_graph_update_heap().

static void heap_bubble_down	(	AVFilterGraph *	graph,
		AVFilterLink *	link,
		int	index
	)

static

Definition at line 1295 of file avfiltergraph.c.

Referenced by avfilter_graph_request_oldest(), and ff_avfilter_graph_update_heap().

void ff_avfilter_graph_update_heap	(	AVFilterGraph *	graph,
		AVFilterLink *	link
	)

Update the position of a link in the age heap.

Definition at line 1317 of file avfiltergraph.c.

Referenced by ff_update_link_current_pts().

Variable Documentation

const AVOption filtergraph_options[]

static

Initial value:

= {
    { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
        { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
        { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
    { "threads",     "Maximum number of threads", OFFSET(nb_threads),
        AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, INT_MAX, FLAGS },
    {"scale_sws_opts"       , "default scale filter options"        , OFFSET(scale_sws_opts)        ,
        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    {"aresample_swr_opts"   , "default aresample filter options"    , OFFSET(aresample_swr_opts)    ,
        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { NULL },
}

Definition at line 42 of file avfiltergraph.c.

const AVClass filtergraph_class

static

Initial value:

= {
    .class_name = "AVFilterGraph",
    .item_name  = av_default_item_name,
    .version    = LIBAVUTIL_VERSION_INT,
    .option     = filtergraph_options,
    .category   = AV_CLASS_CATEGORY_FILTER,
}

Definition at line 55 of file avfiltergraph.c.

Referenced by avfilter_graph_alloc().

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 850 of file avfiltergraph.c.

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation