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FFmpeg
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A link between two filters. More...
#include <avfilter.h>
Public Types | |
| enum | { AVLINK_UNINIT = 0, AVLINK_STARTINIT, AVLINK_INIT } |
| stage of the initialization of the link properties (dimensions, etc) More... | |
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 | w |
| agreed upon image width More... | |
| int | h |
| agreed upon image height More... | |
| AVRational | sample_aspect_ratio |
| agreed upon sample aspect ratio More... | |
| uint64_t | channel_layout |
| channel layout of current buffer (see libavutil/channel_layout.h) More... | |
| int | sample_rate |
| samples per second More... | |
| int | format |
| agreed upon media format More... | |
| AVRational | time_base |
| Define the time base used by the PTS of the frames/samples which will pass through this link. More... | |
| AVFilterFormats * | in_formats |
| Lists of formats and channel layouts supported by the input and output filters respectively. More... | |
| AVFilterFormats * | out_formats |
| AVFilterFormats * | in_samplerates |
| Lists of channel layouts and sample rates used for automatic negotiation. More... | |
| AVFilterFormats * | out_samplerates |
| struct AVFilterChannelLayouts * | in_channel_layouts |
| struct AVFilterChannelLayouts * | out_channel_layouts |
| int | request_samples |
| Audio only, the destination filter sets this to a non-zero value to request that buffers with the given number of samples should be sent to it. More... | |
| enum AVFilterLink:: { ... } | init_state |
| stage of the initialization of the link properties (dimensions, etc) More... | |
| struct AVFilterGraph * | graph |
| Graph the filter belongs to. More... | |
| int64_t | current_pts |
| Current timestamp of the link, as defined by the most recent frame(s), in link time_base units. More... | |
| int64_t | current_pts_us |
| Current timestamp of the link, as defined by the most recent frame(s), in AV_TIME_BASE units. More... | |
| int | age_index |
| Index in the age array. More... | |
| AVRational | frame_rate |
| Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0, will be automatically copied from the first input of the source filter if it exists. More... | |
| AVFrame * | partial_buf |
| Buffer partially filled with samples to achieve a fixed/minimum size. More... | |
| int | partial_buf_size |
| Size of the partial buffer to allocate. More... | |
| int | min_samples |
| Minimum number of samples to filter at once. More... | |
| int | max_samples |
| Maximum number of samples to filter at once. More... | |
| int | channels |
| Number of channels. More... | |
| unsigned | flags |
| Link processing flags. More... | |
| int64_t | frame_count_in |
| Number of past frames sent through the link. More... | |
| int64_t | frame_count_out |
| void * | frame_pool |
| A pointer to a FFFramePool struct. More... | |
| int | frame_wanted_out |
| True if a frame is currently wanted on the output of this filter. More... | |
| AVBufferRef * | hw_frames_ctx |
| For hwaccel pixel formats, this should be a reference to the AVHWFramesContext describing the frames. More... | |
| char | reserved [0xF000] |
| Internal structure members. More... | |
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.
Definition at line 439 of file avfilter.h.
| anonymous enum |
stage of the initialization of the link properties (dimensions, etc)
| Enumerator | |
|---|---|
| AVLINK_UNINIT | not started |
| AVLINK_STARTINIT | started, but incomplete |
| AVLINK_INIT | complete |
Definition at line 503 of file avfilter.h.
| AVFilterContext* AVFilterLink::src |
source filter
Definition at line 440 of file avfilter.h.
Referenced by aeval_config_output(), avfilter_graph_dump_to_buf(), compand_drain(), compressor_config_output(), config_audio_output(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), create_frame(), cudascale_config_props(), cudaupload_config_output(), deint_vaapi_config_output(), ff_opencl_filter_config_output(), ff_scale_eval_dimensions(), ff_vaapi_vpp_config_output(), filter_callback(), fir_frame(), flush(), flush_frame(), headphone_frame(), horizontal_frame_pack(), hwdownload_config_output(), hwmap_config_output(), hwupload_config_output(), join_config_output(), lut2_config_output(), movie_config_output_props(), movie_request_frame(), nppscale_config_props(), npptranspose_config_props(), output_frame(), overlay_opencl_config_output(), program_opencl_config_output(), program_opencl_request_frame(), push_frame(), push_single_pic(), qsvdeint_config_props(), qsvdeint_request_frame(), qsvscale_config_props(), query_frame(), request_frame(), request_frame_ref(), scale_vaapi_config_output(), source_config_props(), source_request_frame(), spatial_frame_pack(), tonemap_opencl_config_output(), transpose_opencl_config_output(), transpose_vaapi_vpp_config_output(), and vertical_frame_pack().
| AVFilterPad* AVFilterLink::srcpad |
output pad on the source filter
Definition at line 441 of file avfilter.h.
Referenced by avfilter_graph_dump_to_buf(), and config_output().
| AVFilterContext* AVFilterLink::dst |
dest filter
Definition at line 443 of file avfilter.h.
Referenced by avfilter_graph_dump_to_buf(), avfilter_graph_request_oldest(), config_props(), and create_frame().
| AVFilterPad* AVFilterLink::dstpad |
input pad on the dest filter
Definition at line 444 of file avfilter.h.
Referenced by avfilter_graph_dump_to_buf(), and avfilter_graph_request_oldest().
| enum AVMediaType AVFilterLink::type |
filter media type
Definition at line 446 of file avfilter.h.
Referenced by config_output(), draw_items(), graph_check_links(), query_formats(), reduce_formats_on_filter(), swap_channel_layouts_on_filter(), swap_sample_fmts_on_filter(), and swap_samplerates_on_filter().
| int AVFilterLink::w |
agreed upon image width
Definition at line 449 of file avfilter.h.
Referenced by activate(), alloc_out_frame(), apply_lut(), apply_lut16(), apply_lut8(), apply_palette(), avgblur_opencl_filter_frame(), blend_frame(), blend_frames(), clear_picture(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), convolution_opencl_filter_frame(), create_frame(), create_weave_frame(), cudascale_config_props(), cudascale_filter_frame(), cudaupload_filter_frame(), draw_background(), draw_items(), draw_legend(), draw_spatial(), ff_opencl_filter_config_output(), ff_scale_eval_dimensions(), ff_vaapi_vpp_config_output(), filter(), filter_color(), filter_color2(), filter_frame(), filter_mono(), geq_filter_frame(), get_frame(), get_palette_frame(), graph_check_links(), hwdownload_config_output(), hwdownload_filter_frame(), hwmap_config_output(), hwupload_filter_frame(), init_vpp_session(), lut2_config_output(), movie_config_output_props(), neighbor_opencl_filter_frame(), nlmeans_opencl_filter_frame(), nppscale_config_props(), nppscale_filter_frame(), npptranspose_config_props(), output_single_frame(), overlay_opencl_blend(), plot_cqt(), plot_freqs(), plot_spectrum_column(), pp_filter_frame(), process_frame(), program_opencl_run(), push_single_pic(), qsvscale_config_props(), qsvscale_filter_frame(), query_frame(), scale_vaapi_config_output(), source_config_props(), source_request_frame(), tonemap_opencl_filter_frame(), transpose_opencl_config_output(), transpose_opencl_filter_frame(), transpose_vaapi_vpp_config_output(), try_push_frame(), and unsharp_opencl_filter_frame().
| int AVFilterLink::h |
agreed upon image height
Definition at line 450 of file avfilter.h.
Referenced by activate(), alloc_out_frame(), apply_lut(), apply_palette(), avgblur_opencl_filter_frame(), blend_frame(), blend_frames(), calc_max_draw(), clear_picture(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), convolution_opencl_filter_frame(), create_frame(), create_weave_frame(), cudascale_config_props(), cudascale_filter_frame(), cudaupload_filter_frame(), draw_background(), draw_items(), draw_legend(), draw_spatial(), ff_opencl_filter_config_output(), ff_scale_eval_dimensions(), ff_vaapi_vpp_config_output(), filter(), filter_color(), filter_color2(), filter_frame(), filter_mono(), geq_filter_frame(), get_frame(), get_palette_frame(), graph_check_links(), hwdownload_config_output(), hwdownload_filter_frame(), hwmap_config_output(), hwupload_filter_frame(), init_vpp_session(), lut2_config_output(), movie_config_output_props(), neighbor_opencl_filter_frame(), nlmeans_opencl_filter_frame(), nppscale_config_props(), nppscale_filter_frame(), npptranspose_config_props(), output_single_frame(), overlay_opencl_blend(), plot_cqt(), plot_freq(), plot_freqs(), plot_spectrum_column(), pp_filter_frame(), process_frame(), program_opencl_run(), push_single_pic(), qsvscale_config_props(), qsvscale_filter_frame(), query_frame(), request_frame(), scale_vaapi_config_output(), source_config_props(), source_request_frame(), tonemap_opencl_filter_frame(), transpose_opencl_config_output(), transpose_opencl_filter_frame(), transpose_vaapi_vpp_config_output(), try_push_frame(), and unsharp_opencl_filter_frame().
| AVRational AVFilterLink::sample_aspect_ratio |
agreed upon sample aspect ratio
Definition at line 451 of file avfilter.h.
Referenced by config_out_props(), config_output(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), cudascale_config_props(), ff_scale_eval_dimensions(), filter_frame(), lut2_config_output(), nppscale_config_props(), npptranspose_config_props(), process_frame(), qsvscale_config_props(), scale_vaapi_config_output(), source_config_props(), and transpose_opencl_config_output().
| uint64_t AVFilterLink::channel_layout |
channel layout of current buffer (see libavutil/channel_layout.h)
Definition at line 453 of file avfilter.h.
Referenced by channelmap_filter_frame(), config_audio_output(), config_output(), filter_frame(), init_filters(), and try_push_frame().
| int AVFilterLink::sample_rate |
samples per second
Definition at line 454 of file avfilter.h.
Referenced by activate(), compressor_config_output(), config_audio_output(), config_output(), config_props(), crossover_setup(), draw_items(), filter_frame(), flush_frame(), init_filters(), push_samples(), request_frame(), and try_push_frame().
| int AVFilterLink::format |
agreed upon media format
Definition at line 456 of file avfilter.h.
Referenced by config_audio_output(), config_out_props(), config_output(), config_props(), config_props_output(), draw_items(), ff_scale_eval_dimensions(), filter_frame(), graph_check_links(), hwdownload_config_output(), hwmap_config_output(), hwmap_filter_frame(), hwupload_config_output(), hwupload_filter_frame(), init_filters(), init_vpp_session(), lut2_config_output(), movie_push_frame(), output_single_frame(), send_silence(), and try_push_frame().
| 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.
Definition at line 465 of file avfilter.h.
Referenced by activate(), alloc_out_frame(), compand_drain(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), deint_vaapi_config_output(), draw_items(), draw_spatial(), ff_framesync_init_dualinput(), ff_qsvvpp_filter_frame(), filter_callback(), filter_frame(), fir_frame(), flush(), interpolate(), lut2_config_output(), main(), movie_config_output_props(), movie_push_frame(), output_single_frame(), plot_spectrum_column(), process_frame(), program_opencl_config_output(), push_frame(), push_samples(), qsvdeint_config_props(), read_frame(), request_frame(), send_silence(), source_config_props(), and update_eof_pts().
| AVFilterFormats* AVFilterLink::in_formats |
Lists of formats and channel layouts supported by the input and output filters respectively.
These lists are used for negotiating the format to actually be used, which will be loaded into the format and channel_layout members, above, when chosen.
Definition at line 481 of file avfilter.h.
Referenced by ff_vaapi_vpp_query_formats(), hwdownload_query_formats(), hwmap_query_formats(), hwupload_query_formats(), movie_query_formats(), query_formats(), query_formats_src(), and swap_sample_fmts_on_filter().
| AVFilterFormats* AVFilterLink::out_formats |
Definition at line 482 of file avfilter.h.
Referenced by ff_vaapi_vpp_query_formats(), hwdownload_query_formats(), hwmap_query_formats(), hwupload_query_formats(), and query_formats().
| AVFilterFormats* AVFilterLink::in_samplerates |
Lists of channel layouts and sample rates used for automatic negotiation.
Definition at line 488 of file avfilter.h.
Referenced by movie_query_formats(), query_formats(), and swap_samplerates_on_filter().
| AVFilterFormats* AVFilterLink::out_samplerates |
Definition at line 489 of file avfilter.h.
Referenced by query_formats().
| struct AVFilterChannelLayouts* AVFilterLink::in_channel_layouts |
Definition at line 490 of file avfilter.h.
Referenced by aeval_query_formats(), movie_query_formats(), query_formats(), reduce_formats_on_filter(), and swap_channel_layouts_on_filter().
| struct AVFilterChannelLayouts* AVFilterLink::out_channel_layouts |
Definition at line 491 of file avfilter.h.
Referenced by query_formats().
| int AVFilterLink::request_samples |
Audio only, the destination filter sets this to a non-zero value to request that buffers with the given number of samples should be sent to it.
AVFilterPad.needs_fifo must also be set on the corresponding input pad. Last buffer before EOF will be padded with silence.
Definition at line 500 of file avfilter.h.
Referenced by request_frame().
| enum { ... } AVFilterLink::init_state |
stage of the initialization of the link properties (dimensions, etc)
| struct AVFilterGraph* AVFilterLink::graph |
Graph the filter belongs to.
Definition at line 512 of file avfilter.h.
| int64_t AVFilterLink::current_pts |
Current timestamp of the link, as defined by the most recent frame(s), in link time_base units.
Definition at line 518 of file avfilter.h.
| int64_t AVFilterLink::current_pts_us |
Current timestamp of the link, as defined by the most recent frame(s), in AV_TIME_BASE units.
Definition at line 524 of file avfilter.h.
Referenced by draw_items().
| int AVFilterLink::age_index |
Index in the age array.
Definition at line 529 of file avfilter.h.
Referenced by avfilter_graph_request_oldest().
| AVRational AVFilterLink::frame_rate |
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0, will be automatically copied from the first input of the source filter if it exists.
Sources should set it to the best estimation of the real frame rate. If the source frame rate is unknown or variable, set this to 1/0. Filters should update it if necessary depending on their function. Sinks can use it to set a default output frame rate. It is similar to the r_frame_rate field in AVStream.
Definition at line 542 of file avfilter.h.
Referenced by activate(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), config_props_ref(), config_video(), config_video_output(), deint_vaapi_config_output(), draw_items(), lut2_config_output(), movie_config_output_props(), qsvdeint_config_props(), and source_config_props().
| AVFrame* AVFilterLink::partial_buf |
Buffer partially filled with samples to achieve a fixed/minimum size.
Definition at line 547 of file avfilter.h.
| int AVFilterLink::partial_buf_size |
Size of the partial buffer to allocate.
Must be between min_samples and max_samples.
Definition at line 553 of file avfilter.h.
| int AVFilterLink::min_samples |
Minimum number of samples to filter at once.
If filter_frame() is called with fewer samples, it will accumulate them in partial_buf. This field and the related ones must not be changed after filtering has started. If 0, all related fields are ignored.
Definition at line 562 of file avfilter.h.
| int AVFilterLink::max_samples |
Maximum number of samples to filter at once.
If filter_frame() is called with more samples, it will split them.
Definition at line 568 of file avfilter.h.
| int AVFilterLink::channels |
Number of channels.
Definition at line 573 of file avfilter.h.
Referenced by activate(), aeval_config_output(), channelmap_filter_frame(), compand_drain(), compressor(), config_output(), config_props(), crossover_setup(), draw_items(), filter_frame(), fir_frame(), flush(), gate(), output_frame(), request_frame(), send_silence(), and try_push_frame().
| unsigned AVFilterLink::flags |
Link processing flags.
Definition at line 578 of file avfilter.h.
| int64_t AVFilterLink::frame_count_in |
Number of past frames sent through the link.
Definition at line 583 of file avfilter.h.
Referenced by activate(), calc_persp_luts(), draw_items(), filter_frame(), output_single_frame(), plot_freq(), and request_frame().
| int64_t AVFilterLink::frame_count_out |
Definition at line 583 of file avfilter.h.
Referenced by avfilter_graph_request_oldest(), and draw_items().
| void* AVFilterLink::frame_pool |
A pointer to a FFFramePool struct.
Definition at line 588 of file avfilter.h.
| int AVFilterLink::frame_wanted_out |
True if a frame is currently wanted on the output of this filter.
Set when ff_request_frame() is called by the output, cleared when a frame is filtered.
Definition at line 595 of file avfilter.h.
Referenced by avfilter_graph_request_oldest().
| AVBufferRef* AVFilterLink::hw_frames_ctx |
For hwaccel pixel formats, this should be a reference to the AVHWFramesContext describing the frames.
Definition at line 601 of file avfilter.h.
Referenced by config_output(), cudaupload_config_output(), ff_opencl_filter_config_output(), ff_vaapi_vpp_config_output(), hwmap_config_output(), hwupload_config_output(), init_out_pool(), init_vpp_session(), nppscale_filter_frame(), npptranspose_config_props(), npptranspose_filter_frame(), qsvdeint_config_props(), query_frame(), transpose_opencl_config_output(), and transpose_vaapi_vpp_config_output().
| char AVFilterLink::reserved[0xF000] |
Internal structure members.
The fields below this limit are internal for libavfilter's use and must in no way be accessed by applications.
Definition at line 610 of file avfilter.h.
1.8.17