FFmpeg
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#include <ctype.h>
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavcodec/avcodec.h"
#include "avfilter.h"
#include "avfiltergraph.h"
#include "formats.h"
#include "internal.h"
Go to the source code of this file.
Macros | |
#define | OFFSET(x) offsetof(AVFilterGraph,x) |
#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. | |
void | avfilter_graph_free (AVFilterGraph **graph) |
Free a graph, destroy its links, and set *graph to NULL. | |
int | avfilter_graph_add_filter (AVFilterGraph *graph, AVFilterContext *filter) |
Add an existing filter instance to a filter graph. | |
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. | |
void | avfilter_graph_set_auto_convert (AVFilterGraph *graph, unsigned flags) |
Enable or disable automatic format conversion inside the 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, char *name) |
Get a filter instance with name name from graph. | |
static int | filter_query_formats (AVFilterContext *ctx) |
static int | insert_conv_filter (AVFilterGraph *graph, AVFilterLink *link, const char *filt_name, const char *filt_args) |
static int | query_formats (AVFilterGraph *graph, AVClass *log_ctx) |
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 | options [] |
static const AVClass | filtergraph_class |
static const uint64_t | ch_subst [][2] |
#define OFFSET | ( | x | ) | offsetof(AVFilterGraph,x) |
Definition at line 37 of file avfiltergraph.c.
#define REDUCE_FORMATS | ( | fmt_type, | |
list_type, | |||
list, | |||
var, | |||
nb, | |||
add_format | |||
) |
Definition at line 495 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 603 of file avfiltergraph.c.
#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT) |
Definition at line 604 of file avfiltergraph.c.
#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT) |
Definition at line 605 of file avfiltergraph.c.
#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT) |
Definition at line 606 of file avfiltergraph.c.
#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT) |
Definition at line 607 of file avfiltergraph.c.
#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT) |
Definition at line 608 of file avfiltergraph.c.
#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT) |
Definition at line 609 of file avfiltergraph.c.
AVFilterGraph* avfilter_graph_alloc | ( | void | ) |
Allocate a filter graph.
Definition at line 54 of file avfiltergraph.c.
Referenced by configure_filtergraph(), init_filters(), lavfi_read_header(), and video_thread().
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 63 of file avfiltergraph.c.
Referenced by configure_filtergraph(), exit_program(), lavfi_read_close(), main(), and video_thread().
int avfilter_graph_add_filter | ( | AVFilterGraph * | graphctx, |
AVFilterContext * | filter | ||
) |
Add an existing filter instance to a filter graph.
graphctx | the filter graph |
filter | the filter to be added |
Definition at line 76 of file avfiltergraph.c.
Referenced by avfilter_graph_create_filter(), and create_filter().
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.
name | the instance name to give to the created filter instance |
graph_ctx | the filter graph |
Definition at line 89 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(), init_filters(), insert_conv_filter(), lavfi_read_header(), and query_formats().
void avfilter_graph_set_auto_convert | ( | AVFilterGraph * | graph, |
unsigned | flags | ||
) |
Enable or disable automatic format conversion inside the graph.
Note that format conversion can still happen inside explicitly inserted scale and aconvert filters.
flags | any of the AVFILTER_AUTO_CONVERT_* constants |
Definition at line 110 of file avfiltergraph.c.
Referenced by choose_pix_fmts().
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Check for the validity of graph.
A graph is considered valid if all its input and output pads are connected.
Definition at line 123 of file avfiltergraph.c.
Referenced by avfilter_graph_config().
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Configure all the links of graphctx.
Definition at line 161 of file avfiltergraph.c.
Referenced by avfilter_graph_config().
AVFilterContext* avfilter_graph_get_filter | ( | AVFilterGraph * | graph, |
char * | name | ||
) |
Get a filter instance with name name from graph.
Definition at line 178 of file avfiltergraph.c.
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Definition at line 189 of file avfiltergraph.c.
Referenced by insert_conv_filter(), and query_formats().
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Definition at line 222 of file avfiltergraph.c.
Referenced by query_formats().
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Definition at line 275 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Definition at line 440 of file avfiltergraph.c.
Referenced by pick_formats().
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Definition at line 530 of file avfiltergraph.c.
Referenced by reduce_formats().
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Definition at line 544 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Definition at line 556 of file avfiltergraph.c.
Referenced by swap_samplerates().
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Definition at line 595 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Definition at line 637 of file avfiltergraph.c.
Referenced by swap_channel_layouts().
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Definition at line 710 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Definition at line 718 of file avfiltergraph.c.
Referenced by swap_sample_fmts().
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Definition at line 778 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Definition at line 787 of file avfiltergraph.c.
Referenced by graph_config_formats().
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Configure the formats of all the links in the graph.
Definition at line 842 of file avfiltergraph.c.
Referenced by avfilter_graph_config().
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Definition at line 867 of file avfiltergraph.c.
Referenced by avfilter_graph_config().
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Definition at line 909 of file avfiltergraph.c.
Referenced by avfilter_graph_config().
int avfilter_graph_config | ( | AVFilterGraph * | graphctx, |
void * | log_ctx | ||
) |
Check validity and configure all the links and formats in the graph.
graphctx | the filter graph |
log_ctx | context used for logging |
Definition at line 947 of file avfiltergraph.c.
Referenced by configure_filtergraph(), init_filters(), lavfi_read_header(), main(), and transcode_init().
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.
graph | the filter graph |
target | the filter(s) to which the command should be sent "all" sends to all filters otherwise it can be a filter or filter instance name which will send the command to all matching filters. |
cmd | the command to sent, 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. |
Definition at line 965 of file avfiltergraph.c.
Referenced by avfilter_graph_send_command(), check_keyboard_interaction(), and filter_frame().
int avfilter_graph_queue_command | ( | AVFilterGraph * | graph, |
const char * | target, | ||
const char * | cmd, | ||
const char * | arg, | ||
int | flags, | ||
double | ts | ||
) |
Queue a command for one or more filter instances.
graph | the filter graph |
target | the filter(s) to which the command should be sent "all" sends to all filters otherwise it can be a filter or filter instance name which will send the command to all matching filters. |
cmd | the command to sent, for handling simplicity all commands must be alphanummeric only |
arg | the argument for the command |
ts | time at which the command should be sent to the filter |
Definition at line 995 of file avfiltergraph.c.
Referenced by check_keyboard_interaction().
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Definition at line 1023 of file avfiltergraph.c.
Referenced by ff_avfilter_graph_update_heap().
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Definition at line 1040 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 1062 of file avfiltergraph.c.
Referenced by ff_update_link_current_pts().
int avfilter_graph_request_oldest | ( | AVFilterGraph * | graph | ) |
Request a frame on the oldest sink link.
If the request returns AVERROR_EOF, try the next.
Note that this function is not meant to be the sole scheduling mechanism of a filtergraph, only a convenience function to help drain a filtergraph in a balanced way under normal circumstances.
Also note that AVERROR_EOF does not mean that frames did not arrive on some of the sinks during the process. When there are multiple sink links, in case the requested link returns an EOF, this may cause a filter to flush pending frames which are sent to another sink link, although unrequested.
Definition at line 1069 of file avfiltergraph.c.
Referenced by transcode_from_filter().
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Definition at line 39 of file avfiltergraph.c.
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Definition at line 46 of file avfiltergraph.c.
Referenced by avfilter_graph_alloc().
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Definition at line 613 of file avfiltergraph.c.