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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 AVFilterPool * | pool |
| 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 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; if left to 0/0, will be automatically be 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... | |
| AVFilterBufferRef * | cur_buf_copy |
| The buffer reference currently being received across the link by the destination filter. More... | |
| int | closed |
| True if the link is closed. More... | |
| int | channels |
| Number of channels. More... | |
| unsigned | frame_requested |
| True if a frame is being requested on the link. More... | |
| unsigned | flags |
| Link processing flags. 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.
Definition at line 559 of file avfilter.h.
Member Enumeration Documentation
| 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 623 of file avfilter.h.
Field Documentation
| int AVFilterLink::age_index |
Index in the age array.
Definition at line 645 of file avfilter.h.
Referenced by avfilter_graph_request_oldest(), ff_avfilter_graph_config_pointers(), ff_avfilter_graph_update_heap(), ff_update_link_current_pts(), heap_bubble_down(), and heap_bubble_up().
| uint64_t AVFilterLink::channel_layout |
channel layout of current buffer (see libavutil/channel_layout.h)
Definition at line 573 of file avfilter.h.
Referenced by buffer_offset(), channelmap_config_input(), channelmap_filter_frame(), config_audio_output(), config_output(), config_props(), config_props_output(), ff_default_get_audio_buffer(), ff_filter_frame(), ff_tlog_link(), filter_frame(), guess_map_any(), guess_map_matching(), init_filters(), join_config_output(), join_request_frame(), lavfi_read_header(), pick_format(), print_digraph(), print_link_prop(), push_samples(), return_audio_frame(), send_silence(), stream_component_open(), and transcode_init().
| int AVFilterLink::channels |
Number of channels.
Definition at line 709 of file avfilter.h.
Referenced by av_buffersink_get_samples(), avfilter_link_get_channels(), config_output(), ff_default_get_audio_buffer(), ff_filter_frame(), filter_frame(), join_request_frame(), pick_format(), print_link_prop(), and stream_component_open().
| int AVFilterLink::closed |
True if the link is closed.
If set, all attemps of start_frame, filter_frame or request_frame will fail with AVERROR_EOF, and if necessary the reference will be destroyed. If request_frame returns AVERROR_EOF, this flag is set on the corresponding link. It can be set also be set by either the source or the destination filter.
Definition at line 704 of file avfilter.h.
Referenced by avfilter_link_set_closed(), ff_filter_frame_framed(), ff_request_frame(), and filter_frame().
| AVFilterBufferRef* AVFilterLink::cur_buf_copy |
The buffer reference currently being received across the link by the destination filter.
This is used internally by the filter system to allow automatic copying of buffers which do not have sufficient permissions for the destination. This should not be accessed directly by the filters.
Definition at line 692 of file avfilter.h.
| int64_t AVFilterLink::current_pts |
Current timestamp of the link, as defined by the most recent frame(s), in AV_TIME_BASE units.
Definition at line 640 of file avfilter.h.
Referenced by avfilter_config_links(), ff_update_link_current_pts(), heap_bubble_down(), and heap_bubble_up().
| AVFilterContext* AVFilterLink::dst |
dest filter
Definition at line 563 of file avfilter.h.
Referenced by add_to_queue(), avfilter_config_links(), avfilter_free(), avfilter_graph_dump_to_buf(), avfilter_graph_request_oldest(), avfilter_insert_filter(), avfilter_link(), channelmap_config_input(), channelmap_filter_frame(), compute_dar(), config_audio_input(), config_inprops(), config_input(), config_input_main(), config_input_overlay(), config_input_props(), config_input_top(), config_output(), config_props(), config_props_input(), default_filter_frame(), ff_filter_frame(), ff_filter_frame_framed(), ff_filter_frame_needs_framing(), ff_null_get_audio_buffer(), ff_null_get_video_buffer(), ff_tlog_link(), filter_frame(), filter_frame_main(), filter_frame_over(), geq_config_props(), geq_filter_frame(), get_audio_buffer(), get_video_buffer(), graph_check_validity(), pick_format(), plot_spectrum_column(), pp_config_props(), pp_filter_frame(), print_digraph(), process_frame(), query_formats(), scale_slice(), and select_frame().
| AVFilterPad* AVFilterLink::dstpad |
input pad on the dest filter
Definition at line 564 of file avfilter.h.
Referenced by avfilter_config_links(), avfilter_free(), avfilter_graph_dump_to_buf(), avfilter_graph_request_oldest(), avfilter_insert_filter(), avfilter_link(), ff_filter_frame_framed(), ff_get_audio_buffer(), ff_get_video_buffer(), graph_insert_fifos(), and print_digraph().
| unsigned AVFilterLink::flags |
Link processing flags.
Definition at line 720 of file avfilter.h.
Referenced by config_audio_output(), config_output(), config_output_props(), config_props(), config_props_output(), config_video_output(), ff_filter_frame_needs_framing(), and ff_request_frame().
| int AVFilterLink::format |
agreed upon media format
Definition at line 576 of file avfilter.h.
Referenced by 7digital-python.lockerEndpoint.DownloadUrls::__init__(), av_buffersink_get_samples(), avfilter_link(), buffer_offset(), config_inprops(), config_input(), config_input_main(), config_input_overlay(), config_input_top(), config_out_props(), config_output(), config_props(), config_props_output(), copy_picture_field(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_filter_frame(), ff_filter_frame_needs_framing(), ff_opencl_deshake_process_inout_buf(), ff_tlog_link(), filter_frame(), geq_config_props(), init_filters(), join_request_frame(), lavfi_read_header(), pick_format(), pick_formats(), pp_config_props(), print_digraph(), print_link_prop(), push_samples(), request_frame(), return_audio_frame(), send_silence(), and transcode_init().
| AVRational AVFilterLink::frame_rate |
Frame rate of the stream on the link, or 1/0 if unknown; if left to 0/0, will be automatically be 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. 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 657 of file avfilter.h.
Referenced by av_buffersink_get_frame_rate(), avfilter_config_links(), config_input(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), and movie_config_output_props().
| unsigned AVFilterLink::frame_requested |
True if a frame is being requested on the link.
Used internally by the framework.
Definition at line 715 of file avfilter.h.
Referenced by ff_filter_frame_framed(), and ff_request_frame().
| struct AVFilterGraph* AVFilterLink::graph |
Graph the filter belongs to.
Definition at line 634 of file avfilter.h.
Referenced by ff_avfilter_graph_config_pointers(), ff_update_link_current_pts(), and filter_frame().
| int AVFilterLink::h |
agreed upon image height
Definition at line 570 of file avfilter.h.
Referenced by avfilter_config_links(), compute_dar(), config_inprops(), config_input(), config_input_overlay(), config_input_props(), config_out_props(), config_outprops(), config_output(), config_output_props(), config_props(), config_props_input(), config_props_output(), config_video_output(), copy_picture_field(), create_weave_frame(), draw_blank_frame(), ff_filter_frame(), ff_filter_frame_framed(), ff_opencl_deshake_process_inout_buf(), ff_tlog_link(), filter_frame(), geq_filter_frame(), get_current_tile_pos(), lavfi_read_header(), movie_config_output_props(), plot_spectrum_column(), pp_config_props(), pp_filter_frame(), print_digraph(), print_link_prop(), return_frame(), source_config_props(), source_request_frame(), and transcode_init().
| struct AVFilterChannelLayouts* AVFilterLink::in_channel_layouts |
Definition at line 610 of file avfilter.h.
Referenced by avfilter_free(), channelmap_query_formats(), filter_query_formats(), formats_declared(), join_query_formats(), movie_query_formats(), pick_format(), query_formats(), reduce_formats_on_filter(), and swap_channel_layouts_on_filter().
| 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 601 of file avfilter.h.
Referenced by avfilter_free(), formats_declared(), movie_query_formats(), pick_format(), pick_formats(), query_formats(), and swap_sample_fmts_on_filter().
| AVFilterFormats* AVFilterLink::in_samplerates |
Lists of channel layouts and sample rates used for automatic negotiation.
Definition at line 608 of file avfilter.h.
Referenced by avfilter_free(), formats_declared(), movie_query_formats(), pick_format(), query_formats(), and swap_samplerates_on_filter().
| enum { ... } AVFilterLink::init_state |
stage of the initialization of the link properties (dimensions, etc)
Referenced by avfilter_config_links().
| 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 683 of file avfilter.h.
Referenced by av_buffersink_set_frame_size(), config_audio_input(), and ff_filter_frame().
| 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 677 of file avfilter.h.
Referenced by av_buffersink_set_frame_size(), config_audio_input(), ff_filter_frame(), and ff_filter_frame_needs_framing().
| struct AVFilterChannelLayouts* AVFilterLink::out_channel_layouts |
Definition at line 611 of file avfilter.h.
Referenced by avfilter_free(), avfilter_insert_filter(), channelmap_query_formats(), filter_query_formats(), formats_declared(), join_query_formats(), pick_format(), query_formats(), reduce_formats_on_filter(), and swap_channel_layouts_on_filter().
| AVFilterFormats* AVFilterLink::out_formats |
Definition at line 602 of file avfilter.h.
Referenced by avfilter_free(), avfilter_insert_filter(), formats_declared(), pick_format(), query_formats(), and swap_sample_fmts_on_filter().
| AVFilterFormats* AVFilterLink::out_samplerates |
Definition at line 609 of file avfilter.h.
Referenced by avfilter_free(), avfilter_insert_filter(), formats_declared(), pick_format(), query_formats(), and swap_samplerates_on_filter().
| AVFrame* AVFilterLink::partial_buf |
Buffer partially filled with samples to achieve a fixed/minimum size.
Definition at line 662 of file avfilter.h.
Referenced by ff_filter_frame(), ff_filter_frame_needs_framing(), and ff_request_frame().
| int AVFilterLink::partial_buf_size |
Size of the partial buffer to allocate.
Must be between min_samples and max_samples.
Definition at line 668 of file avfilter.h.
Referenced by av_buffersink_set_frame_size(), config_audio_input(), and ff_filter_frame_needs_framing().
| struct AVFilterPool* AVFilterLink::pool |
Definition at line 629 of file avfilter.h.
Referenced by ff_default_get_video_buffer().
| 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 620 of file avfilter.h.
Referenced by join_request_frame(), request_frame(), and return_audio_frame().
| AVRational AVFilterLink::sample_aspect_ratio |
agreed upon sample aspect ratio
Definition at line 571 of file avfilter.h.
Referenced by avfilter_config_links(), compute_dar(), config_input(), config_output(), config_props(), config_props_output(), config_video_output(), lavfi_read_header(), print_link_prop(), source_config_props(), and transcode_init().
| int AVFilterLink::sample_rate |
samples per second
Definition at line 574 of file avfilter.h.
Referenced by avfilter_config_links(), buffer_offset(), config_audio_input(), config_input(), config_output(), config_output_props(), config_props(), ff_default_get_audio_buffer(), ff_filter_frame(), ff_filter_frame_needs_framing(), ff_tlog_link(), filter_frame(), init_filters(), join_request_frame(), lavfi_read_header(), pick_format(), print_digraph(), print_link_prop(), push_frame(), push_samples(), read_from_fifo(), request_frame(), send_out(), send_silence(), stream_component_open(), and transcode_init().
| AVFilterContext* AVFilterLink::src |
source filter
Definition at line 560 of file avfilter.h.
Referenced by avfilter_config_links(), avfilter_free(), avfilter_graph_dump_to_buf(), avfilter_insert_filter(), avfilter_link(), config_audio_output(), config_input(), config_out_props(), config_outprops(), config_output(), config_output_props(), config_props(), config_props_output(), config_video_output(), ff_poll_frame(), ff_request_frame(), ff_tlog_link(), graph_check_validity(), join_config_output(), join_request_frame(), movie_config_output_props(), movie_request_frame(), output_frame(), pick_format(), poll_frame(), push_frame(), push_samples(), query_formats(), request_frame(), source_config_props(), and source_request_frame().
| AVFilterPad* AVFilterLink::srcpad |
output pad on the source filter
Definition at line 561 of file avfilter.h.
Referenced by avfilter_config_links(), avfilter_free(), avfilter_graph_dump_to_buf(), avfilter_link(), ff_poll_frame(), ff_request_frame(), and print_digraph().
| 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 585 of file avfilter.h.
Referenced by audio_decode_frame(), av_buffersink_get_samples(), avfilter_config_links(), blend_frame(), buffer_offset(), check_black_end(), config_input(), config_out_props(), config_output(), config_output_props(), config_props(), config_props_output(), describe_frame_to_str(), draw_text(), ff_filter_frame_framed(), ff_filter_frame_needs_framing(), ff_update_link_current_pts(), ff_vf_next_put_image(), filter_frame(), geq_filter_frame(), lavfi_read_header(), lavfi_read_packet(), main(), movie_config_output_props(), plot_spectrum_column(), print_digraph(), push_frame(), push_samples(), read_from_fifo(), reap_filters(), request_frame(), select_frame(), send_out(), send_silence(), source_config_props(), transcode_init(), try_filter_frame(), and video_thread().
| enum AVMediaType AVFilterLink::type |
filter media type
Definition at line 566 of file avfilter.h.
Referenced by 7digital-python.lockerEndpoint.LockerRelease::__init__(), av_buffersink_set_frame_size(), av_buffersrc_add_frame_internal(), avfilter_config_links(), avfilter_link(), config_input(), config_props(), default_query_formats_common(), ff_filter_frame(), ff_filter_frame_framed(), ff_tlog_link(), filter_frame(), filter_query_formats(), formats_declared(), graph_insert_fifos(), lavfi_read_header(), main(), pick_format(), print_digraph(), print_link_prop(), query_formats(), reap_filters(), reduce_formats_on_filter(), select_frame(), 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 569 of file avfilter.h.
Referenced by avfilter_config_links(), compute_dar(), config_inprops(), config_input(), config_input_overlay(), config_input_props(), config_out_props(), config_outprops(), config_output(), config_output_props(), config_props(), config_props_input(), config_props_output(), config_video_output(), copy_picture_field(), create_weave_frame(), draw_blank_frame(), ff_filter_frame(), ff_filter_frame_framed(), ff_tlog_link(), filter_frame(), geq_filter_frame(), get_current_tile_pos(), lavfi_read_header(), movie_config_output_props(), plot_spectrum_column(), pp_config_props(), pp_filter_frame(), print_digraph(), print_link_prop(), push_frame(), return_frame(), source_config_props(), source_request_frame(), and transcode_init().
The documentation for this struct was generated from the following file:
Generated on Fri Dec 20 2024 06:56:17 for FFmpeg by
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