A link between two filters. More...

#include <avfilter.h>

Data Fields
AVFilterContext *	src
	source filter More...

AVFilterPad *	srcpad
	output pad on the source filter More...

AVFilterContext *	dst
	dest filter More...

AVFilterPad *	dstpad
	input pad on the dest filter More...

enum AVMediaType	type
	filter media type More...

int	format
	agreed upon media format More...

int	w
	agreed upon image width More...

int	h
	agreed upon image height More...

AVRational	sample_aspect_ratio
	agreed upon sample aspect ratio More...

enum AVColorSpace	colorspace
	For non-YUV links, these are respectively set to fallback values (as appropriate for that colorspace). More...

enum AVColorRange	color_range
	agreed upon YUV color range More...

int	sample_rate
	samples per second More...

AVChannelLayout	ch_layout
	channel layout of current buffer (see libavutil/channel_layout.h) More...

AVRational	time_base
	Define the time base used by the PTS of the frames/samples which will pass through this link. More...

AVFilterFormatsConfig	incfg
	Lists of supported formats / etc. More...

AVFilterFormatsConfig	outcfg
	Lists of supported formats / etc. More...

Detailed Description

A link between two filters.

This contains pointers to the source and destination filters between which this link exists, and the indexes of the pads involved. In addition, this link also contains the parameters which have been negotiated and agreed upon between the filter, such as image dimensions, format, etc.

Applications must not normally access the link structure directly. Use the buffersrc and buffersink API instead. In the future, access to the header may be reserved for filters implementation.

Examples: decode_filter_audio.c.

Definition at line 578 of file avfilter.h.

Field Documentation

◆ src

AVFilterContext* AVFilterLink::src

source filter

Definition at line 579 of file avfilter.h.

Referenced by aconfig_props(), activate(), aeval_config_output(), audio_frame(), avfilter_graph_dump_to_buf(), bwdif_vulkan_config_output(), compand_drain(), compressor_config_output(), config_audio_output(), config_comm_output(), config_eq_output(), config_filter(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), copy_column(), create_frame(), cuda_bilateral_config_props(), cudachromakey_config_props(), cudacolorspace_config_props(), cudascale_config_props(), cudaupload_config_output(), ddagrab_config_props(), ddagrab_request_frame(), deint_vaapi_config_output(), dnn_classify_flush_frame(), dnn_detect_flush_frame(), drawbox_vaapi_config_output(), extract_plane(), ff_opencl_filter_config_output(), ff_vaapi_vpp_config_output(), ff_vk_filter_config_output(), ff_yadif_config_output_common(), filter_callback(), filter_frame(), fir_frame(), flush(), flush_frame(), fsync_config_props(), headphone_frame(), horizontal_frame_pack(), hwdownload_config_output(), hwmap_config_output(), hwupload_config_output(), join_config_output(), libplacebo_config_output(), lut2_config_output(), movie_config_output_props(), nppsharpen_config_props(), npptranspose_config_props(), output_frame(), overlay_cuda_config_output(), overlay_opencl_config_output(), overlay_vaapi_config_output(), overlay_vulkan_config_output(), pad_opencl_config_output(), pad_vaapi_config_output(), prepare_uv_scale(), program_opencl_config_output(), program_opencl_request_frame(), push_frame(), push_single_pic(), qrencodesrc_config_props(), query_frame(), request_frame(), request_frame_ref(), scale_vaapi_config_output(), scale_vt_config_output(), scale_vulkan_config_output(), source_config_props(), source_request_frame(), spatial_frame_pack(), testsrc_vulkan_config_props(), tonemap_opencl_config_output(), transpose_opencl_config_output(), transpose_vaapi_vpp_config_output(), transpose_vt_config_output(), transpose_vt_recreate_hw_ctx(), vertical_frame_pack(), video_frame(), and xfade_opencl_config_output().

◆ srcpad

AVFilterPad* AVFilterLink::srcpad

output pad on the source filter

Definition at line 580 of file avfilter.h.

Referenced by avfilter_graph_dump_to_buf(), and config_output().

◆ dst

AVFilterContext* AVFilterLink::dst

dest filter

Definition at line 582 of file avfilter.h.

Referenced by avfilter_graph_dump_to_buf(), avfilter_graph_request_oldest(), config_props(), and create_frame().

◆ dstpad

AVFilterPad* AVFilterLink::dstpad

input pad on the dest filter

Definition at line 583 of file avfilter.h.

Referenced by avfilter_graph_dump_to_buf(), and avfilter_graph_request_oldest().

◆ type

enum AVMediaType AVFilterLink::type

filter media type

Definition at line 585 of file avfilter.h.

Referenced by activate(), config_output(), draw_items(), query_formats(), reduce_formats_on_filter(), swap_channel_layouts_on_filter(), swap_sample_fmts_on_filter(), and swap_samplerates_on_filter().

◆ format

int AVFilterLink::format

agreed upon media format

Examples: decode_filter_audio.c.

Definition at line 587 of file avfilter.h.

Referenced by config_audio_output(), config_out_props(), config_output(), config_props(), config_props_output(), copy_column(), do_scale(), draw_items(), ff_scale_eval_dimensions(), filter_frame(), get_buffer(), hwdownload_config_output(), hwmap_config_output(), hwmap_filter_frame(), hwupload_config_output(), hwupload_filter_frame(), init_filters(), init_vpp_session(), libplacebo_config_output(), lut2_config_output(), output_frame(), output_single_frame(), qrencodesrc_config_props(), scale_eval_dimensions(), scale_frame(), send_silence(), and try_push_frame().

◆ w

int AVFilterLink::w

agreed upon image width

Definition at line 590 of file avfilter.h.

Referenced by activate(), alloc_out_frame(), apply_palette(), avgblur_opencl_filter_frame(), avgblur_vulkan_filter_frame(), blend_frame(), blend_frames(), blur_frame(), bwdif_vulkan_config_output(), chromaber_vulkan_filter_frame(), clear_picture(), color_balance16(), color_balance8(), config_comm_output(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), convert_frame(), convolution_opencl_filter_frame(), correct_frame(), create_frame(), cudacolorspace_config_props(), cudacolorspace_conv(), cudacolorspace_filter_frame(), cudascale_config_props(), cudascale_filter_frame(), cudascale_scale(), cudaupload_filter_frame(), ddagrab_config_props(), deshake_opencl_init(), do_morpho(), do_scale(), draw_background(), draw_items(), draw_legend(), draw_spatial(), drawbox_vaapi_filter_frame(), extract_plane(), ff_opencl_filter_config_output(), ff_vaapi_vpp_config_output(), ff_vk_filter_config_output(), ff_yadif_config_output_common(), filter(), filter_color(), filter_color2(), filter_frame(), filter_mono(), flip_bayer(), gblur_vulkan_filter_frame(), generate_output(), geq_filter_frame(), get_buffer(), get_frame(), get_palette_frame(), hwdownload_config_output(), hwdownload_filter_frame(), hwmap_config_output(), hwupload_filter_frame(), init_vpp_session(), libplacebo_config_output(), lut2_config_output(), movie_config_output_props(), neighbor_opencl_filter_frame(), nlmeans_opencl_filter_frame(), nppscale_eval_dimensions(), nppscale_filter_frame(), nppscale_scale(), nppsharpen_config_props(), npptranspose_config_props(), output_frame(), output_single_frame(), overlay_opencl_blend(), overlay_vaapi_blend(), overlay_vaapi_config_output(), overlay_vulkan_blend(), pad_opencl_config_output(), pad_vaapi_config_output(), pad_vaapi_filter_frame(), plot_cqt(), plot_freqs(), plot_spectrum_column(), pp_filter_frame(), prepare_uv_scale(), process_frame(), program_opencl_run(), push_single_pic(), qrencodesrc_config_props(), query_frame(), remap_opencl_process_frame(), request_frame(), scale_eval_dimensions(), scale_frame(), scale_vaapi_config_output(), scale_vt_config_output(), scale_vt_filter_frame(), scale_vulkan_filter_frame(), source_config_props(), source_request_frame(), testsrc_vulkan_config_props(), tonemap_opencl_filter_frame(), transpose_opencl_config_output(), transpose_opencl_filter_frame(), transpose_vaapi_vpp_config_output(), transpose_vt_config_output(), transpose_vt_filter_frame(), transpose_vt_recreate_hw_ctx(), try_push_frame(), unsharp_opencl_filter_frame(), update_crops(), video_frame(), xfade_frame(), and xfade_opencl_config_output().

◆ h

int AVFilterLink::h

agreed upon image height

Definition at line 591 of file avfilter.h.

Referenced by activate(), alloc_out_frame(), apply_palette(), avgblur_opencl_filter_frame(), avgblur_vulkan_filter_frame(), blend_frame(), blend_frames(), blur_frame(), bwdif_vulkan_config_output(), calc_max_draw(), chromaber_vulkan_filter_frame(), clear_picture(), config_comm_output(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), convert_frame(), convolution_opencl_filter_frame(), copy_column(), correct_frame(), create_frame(), cudacolorspace_config_props(), cudacolorspace_conv(), cudacolorspace_filter_frame(), cudascale_config_props(), cudascale_filter_frame(), cudascale_scale(), cudaupload_filter_frame(), ddagrab_config_props(), deshake_opencl_init(), do_morpho(), do_scale(), draw_background(), draw_items(), draw_legend(), draw_sierpinski(), draw_spatial(), drawbox_vaapi_filter_frame(), extract_plane(), ff_opencl_filter_config_output(), ff_vaapi_vpp_config_output(), ff_vk_filter_config_output(), ff_yadif_config_output_common(), filter(), filter_color(), filter_color2(), filter_frame(), filter_mono(), flip_bayer(), gblur_vulkan_filter_frame(), generate_output(), geq_filter_frame(), get_buffer(), get_frame(), get_palette_frame(), hwdownload_config_output(), hwdownload_filter_frame(), hwmap_config_output(), hwupload_filter_frame(), init_vpp_session(), libplacebo_config_output(), lut2_config_output(), movie_config_output_props(), neighbor_opencl_filter_frame(), nlmeans_opencl_filter_frame(), nppscale_eval_dimensions(), nppscale_filter_frame(), nppscale_scale(), nppsharpen_config_props(), npptranspose_config_props(), oscilloscope_filter_frame(), output_frame(), output_single_frame(), overlay_opencl_blend(), overlay_vaapi_blend(), overlay_vaapi_config_output(), overlay_vulkan_blend(), pad_opencl_config_output(), pad_vaapi_config_output(), pad_vaapi_filter_frame(), plot_cqt(), plot_freq(), plot_freqs(), plot_spectrum_column(), pp_filter_frame(), prepare_uv_scale(), process_frame(), program_opencl_run(), push_single_pic(), qrencodesrc_config_props(), query_frame(), remap_opencl_process_frame(), request_frame(), scale_eval_dimensions(), scale_frame(), scale_vaapi_config_output(), scale_vt_config_output(), scale_vt_filter_frame(), scale_vulkan_filter_frame(), source_config_props(), source_request_frame(), testsrc_vulkan_config_props(), tonemap_opencl_filter_frame(), transpose_opencl_config_output(), transpose_opencl_filter_frame(), transpose_vaapi_vpp_config_output(), transpose_vt_config_output(), transpose_vt_filter_frame(), transpose_vt_recreate_hw_ctx(), try_push_frame(), unsharp_opencl_filter_frame(), update_crops(), video_frame(), xfade_frame(), xfade_opencl_config_output(), and xfade_slice().

◆ sample_aspect_ratio

AVRational AVFilterLink::sample_aspect_ratio

◆ colorspace

enum AVColorSpace AVFilterLink::colorspace

For non-YUV links, these are respectively set to fallback values (as appropriate for that colorspace).

Note: This includes grayscale formats, as these are currently treated as forced full range always. agreed upon YUV color space

Definition at line 600 of file avfilter.h.

Referenced by config_out_props(), config_output(), config_props(), config_props_ref(), do_scale(), filter_frame(), output_frame(), qrencodesrc_config_props(), and scale_frame().

◆ color_range

enum AVColorRange AVFilterLink::color_range

agreed upon YUV color range

Definition at line 601 of file avfilter.h.

Referenced by config_out_props(), config_output(), config_props(), config_props_ref(), do_scale(), filter_frame(), output_frame(), qrencodesrc_config_props(), and scale_frame().

◆ sample_rate

int AVFilterLink::sample_rate

samples per second

Examples: decode_filter_audio.c.

Definition at line 604 of file avfilter.h.

Referenced by aconfig_props(), analyze_frame(), compressor_config_output(), config_audio_output(), config_eq_output(), config_filter(), config_output(), config_props(), crossover_setup(), draw_items(), filter_frame(), flush_frame(), get_buffer(), init_filters(), output_frame(), process_command(), push_frame(), push_samples(), request_frame(), and try_push_frame().

◆ ch_layout

AVChannelLayout AVFilterLink::ch_layout

channel layout of current buffer (see libavutil/channel_layout.h)

Examples: decode_filter_audio.c.

Definition at line 605 of file avfilter.h.

Referenced by activate(), aeval_config_output(), channelmap_filter_frame(), compand_drain(), compressor(), config_audio_output(), config_filter(), config_output(), config_props(), crossover_setup(), draw_items(), filter_frame(), fir_frame(), gate(), get_buffer(), init_filters(), output_frame(), request_frame(), send_silence(), and try_push_frame().

◆ time_base

AVRational AVFilterLink::time_base

Define the time base used by the PTS of the frames/samples which will pass through this link.

During the configuration stage, each filter is supposed to change only the output timebase, while the timebase of the input link is assumed to be an unchangeable property.