#include <stddef.h>#include "libavutil/avutil.h"#include "libavutil/log.h"#include "libavutil/samplefmt.h"#include "libavutil/pixfmt.h"#include "libavutil/rational.h"#include "libavfilter/version.h"Go to the source code of this file.
Data Structures | |
| struct | AVFilterBuffer |
| A reference-counted buffer data type used by the filter system. More... | |
| struct | AVFilterBufferRefAudioProps |
| Audio specific properties in a reference to an AVFilterBuffer. More... | |
| struct | AVFilterBufferRefVideoProps |
| Video specific properties in a reference to an AVFilterBuffer. More... | |
| struct | AVFilterBufferRef |
| A reference to an AVFilterBuffer. More... | |
| struct | AVFilterPad |
| A filter pad used for either input or output. More... | |
| struct | AVFilter |
| Filter definition. More... | |
| struct | AVFilterContext |
| An instance of a filter. More... | |
| struct | AVFilterLink |
| A link between two filters. More... | |
Defines | |
| #define | AV_PERM_READ 0x01 |
| can read from the buffer | |
| #define | AV_PERM_WRITE 0x02 |
| can write to the buffer | |
| #define | AV_PERM_PRESERVE 0x04 |
| nobody else can overwrite the buffer | |
| #define | AV_PERM_REUSE 0x08 |
| can output the buffer multiple times, with the same contents each time | |
| #define | AV_PERM_REUSE2 0x10 |
| can output the buffer multiple times, modified each time | |
| #define | AV_PERM_NEG_LINESIZES 0x20 |
| the buffer requested can have negative linesizes | |
| #define | AV_PERM_ALIGN 0x40 |
| the buffer must be aligned | |
| #define | AVFILTER_ALIGN 16 |
| #define | AVFILTER_CMD_FLAG_ONE 1 |
| Stop once a filter understood the command (for target=all for example), fast filters are favored automatically. | |
| #define | AVFILTER_CMD_FLAG_FAST 2 |
| Only execute command when its fast (like a video out that supports contrast adjustment in hw). | |
Typedefs | |
| typedef struct AVFilterContext | AVFilterContext |
| typedef struct AVFilterLink | AVFilterLink |
| typedef struct AVFilterPad | AVFilterPad |
| typedef struct AVFilterFormats | AVFilterFormats |
Functions | |
| unsigned | avfilter_version (void) |
| Return the LIBAVFILTER_VERSION_INT constant. | |
| const char * | avfilter_configuration (void) |
| Return the libavfilter build-time configuration. | |
| const char * | avfilter_license (void) |
| Return the libavfilter license. | |
| const AVClass * | avfilter_get_class (void) |
| Get the class for the AVFilterContext struct. | |
| void | avfilter_copy_buffer_ref_props (AVFilterBufferRef *dst, AVFilterBufferRef *src) |
| Copy properties of src to dst, without copying the actual data. | |
| AVFilterBufferRef * | avfilter_ref_buffer (AVFilterBufferRef *ref, int pmask) |
| Add a new reference to a buffer. | |
| void | avfilter_unref_buffer (AVFilterBufferRef *ref) |
| Remove a reference to a buffer. | |
| void | avfilter_unref_bufferp (AVFilterBufferRef **ref) |
| Remove a reference to a buffer and set the pointer to NULL. | |
| const char * | avfilter_pad_get_name (AVFilterPad *pads, int pad_idx) |
| Get the name of an AVFilterPad. | |
| enum AVMediaType | avfilter_pad_get_type (AVFilterPad *pads, int pad_idx) |
| Get the type of an AVFilterPad. | |
| int | avfilter_link (AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad) |
| Link two filters together. | |
| void | avfilter_link_free (AVFilterLink **link) |
| Free the link in *link, and set its pointer to NULL. | |
| void | avfilter_link_set_closed (AVFilterLink *link, int closed) |
| Set the closed field of a link. | |
| int | avfilter_config_links (AVFilterContext *filter) |
| Negotiate the media format, dimensions, etc of all inputs to a filter. | |
| AVFilterBufferRef * | avfilter_get_video_buffer_ref_from_arrays (uint8_t *const data[4], const int linesize[4], int perms, int w, int h, enum PixelFormat format) |
| Create a buffer reference wrapped around an already allocated image buffer. | |
| AVFilterBufferRef * | avfilter_get_audio_buffer_ref_from_arrays (uint8_t **data, int linesize, int perms, int nb_samples, enum AVSampleFormat sample_fmt, uint64_t channel_layout) |
| Create an audio buffer reference wrapped around an already allocated samples buffer. | |
| int | avfilter_process_command (AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| Make the filter instance process a command. | |
| void | avfilter_register_all (void) |
| Initialize the filter system. | |
| void | avfilter_uninit (void) |
| Uninitialize the filter system. | |
| int | avfilter_register (AVFilter *filter) |
| Register a filter. | |
| AVFilter * | avfilter_get_by_name (const char *name) |
| Get a filter definition matching the given name. | |
| AVFilter ** | av_filter_next (AVFilter **filter) |
| If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter. | |
| int | avfilter_open (AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name) |
| Create a filter instance. | |
| int | avfilter_init_filter (AVFilterContext *filter, const char *args, void *opaque) |
| Initialize a filter. | |
| void | avfilter_free (AVFilterContext *filter) |
| Free a filter context. | |
| int | avfilter_insert_filter (AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx) |
| Insert a filter in the middle of an existing link. | |
| #define AV_PERM_ALIGN 0x40 |
the buffer must be aligned
Definition at line 106 of file avfilter.h.
Referenced by ff_default_get_audio_buffer(), ff_default_get_video_buffer(), filter_samples(), get_video_buffer(), and start_frame().
| #define AV_PERM_NEG_LINESIZES 0x20 |
the buffer requested can have negative linesizes
Definition at line 105 of file avfilter.h.
Referenced by ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), ff_start_frame(), get_video_buffer(), and start_frame().
| #define AV_PERM_PRESERVE 0x04 |
nobody else can overwrite the buffer
Definition at line 102 of file avfilter.h.
Referenced by config_output(), decode_video(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), frame_to_buf(), init(), request_frame(), sub2video_prepare(), and video_thread().
| #define AV_PERM_READ 0x01 |
can read from the buffer
Definition at line 100 of file avfilter.h.
Referenced by avfilter_get_audio_buffer_ref_from_arrays(), avfilter_get_video_buffer_ref_from_arrays(), decode_video(), end_frame(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), init(), return_audio_frame(), sub2video_prepare(), vf_next_put_image(), and video_thread().
| #define AV_PERM_REUSE 0x08 |
can output the buffer multiple times, with the same contents each time
Definition at line 103 of file avfilter.h.
Referenced by ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), and request_frame().
| #define AV_PERM_REUSE2 0x10 |
can output the buffer multiple times, modified each time
Definition at line 104 of file avfilter.h.
Referenced by config_output(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_get_ref_perms_string(), frame_to_buf(), and vf_next_put_image().
| #define AV_PERM_WRITE 0x02 |
can write to the buffer
Definition at line 101 of file avfilter.h.
Referenced by av_asrc_buffer_add_samples(), av_buffersink_read_samples(), av_buffersrc_add_frame(), config_output(), default_start_frame(), end_frame(), ff_copy_buffer_ref(), ff_default_get_audio_buffer(), ff_default_get_video_buffer(), ff_filter_samples(), ff_get_ref_perms_string(), ff_inplace_start_frame(), filter_samples(), frame_to_buf(), output_frame(), push_frame(), push_samples(), read_from_fifo(), request_frame(), return_audio_frame(), send_silence(), source_request_frame(), split_init(), start_frame(), and vf_next_put_image().
| #define AVFILTER_ALIGN 16 |
| #define AVFILTER_CMD_FLAG_FAST 2 |
Only execute command when its fast (like a video out that supports contrast adjustment in hw).
Definition at line 778 of file avfilter.h.
Referenced by avfilter_graph_send_command().
| #define AVFILTER_CMD_FLAG_ONE 1 |
Stop once a filter understood the command (for target=all for example), fast filters are favored automatically.
Definition at line 777 of file avfilter.h.
Referenced by avfilter_graph_queue_command(), avfilter_graph_send_command(), check_keyboard_interaction(), and process_frame().
| typedef struct AVFilterContext AVFilterContext |
Definition at line 55 of file avfilter.h.
| typedef struct AVFilterFormats AVFilterFormats |
Definition at line 58 of file avfilter.h.
| typedef struct AVFilterLink AVFilterLink |
Definition at line 56 of file avfilter.h.
| typedef struct AVFilterPad AVFilterPad |
Definition at line 57 of file avfilter.h.
If filter is NULL, returns a pointer to the first registered filter pointer, if filter is non-NULL, returns the next pointer after filter.
If the returned pointer points to NULL, the last registered filter was already reached.
Definition at line 424 of file avfilter.c.
Referenced by filter_child_class_next(), and show_filters().
| int avfilter_config_links | ( | AVFilterContext * | filter | ) |
Negotiate the media format, dimensions, etc of all inputs to a filter.
| filter | the filter to negotiate the properties for its inputs |
Definition at line 207 of file avfilter.c.
Referenced by avfilter_config_links(), and graph_config_links().
| const char* avfilter_configuration | ( | void | ) |
| void avfilter_copy_buffer_ref_props | ( | AVFilterBufferRef * | dst, | |
| AVFilterBufferRef * | src | |||
| ) |
Copy properties of src to dst, without copying the actual data.
Definition at line 184 of file buffer.c.
Referenced by default_start_frame(), end_frame(), ff_copy_buffer_ref(), ff_filter_samples(), ff_inplace_start_frame(), ff_start_frame(), filter_samples(), return_frame(), and start_frame().
| void avfilter_free | ( | AVFilterContext * | filter | ) |
Free a filter context.
| filter | the filter to free |
Definition at line 556 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), avfilter_graph_free(), avfilter_graph_parse(), avfilter_graph_parse2(), create_filter(), and main().
| AVFilterBufferRef* avfilter_get_audio_buffer_ref_from_arrays | ( | uint8_t ** | data, | |
| int | linesize, | |||
| int | perms, | |||
| int | nb_samples, | |||
| enum AVSampleFormat | sample_fmt, | |||
| uint64_t | channel_layout | |||
| ) |
Create an audio buffer reference wrapped around an already allocated samples buffer.
| data | pointers to the samples plane buffers | |
| linesize | linesize for the samples plane buffers | |
| perms | the required access permissions | |
| nb_samples | number of samples per channel | |
| sample_fmt | the format of each sample in the buffer to allocate | |
| channel_layout | the channel layout of the buffer |
Definition at line 90 of file audio.c.
Referenced by av_asrc_buffer_add_samples(), avfilter_get_audio_buffer_ref_from_frame(), ff_default_get_audio_buffer(), and join_request_frame().
| AVFilter* avfilter_get_by_name | ( | const char * | name | ) |
Get a filter definition matching the given name.
| name | the filter name to find |
Definition at line 399 of file avfilter.c.
Referenced by configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), configure_output_video_filter(), create_filter(), graph_insert_fifos(), init_filters(), insert_conv_filter(), lavfi_read_header(), main(), and query_formats().
| const AVClass* avfilter_get_class | ( | void | ) |
Get the class for the AVFilterContext struct.
Definition at line 489 of file avfilter.c.
Referenced by show_help_default().
| AVFilterBufferRef* avfilter_get_video_buffer_ref_from_arrays | ( | uint8_t *const | data[4], | |
| const int | linesize[4], | |||
| int | perms, | |||
| int | w, | |||
| int | h, | |||
| enum PixelFormat | format | |||
| ) |
Create a buffer reference wrapped around an already allocated image buffer.
| data | pointers to the planes of the image to reference | |
| linesize | linesizes for the planes of the image to reference | |
| perms | the required access permissions | |
| w | the width of the image specified by the data and linesize arrays | |
| h | the height of the image specified by the data and linesize arrays | |
| format | the pixel format of the image specified by the data and linesize arrays |
Definition at line 96 of file video.c.
Referenced by avfilter_get_video_buffer_ref_from_frame(), decode_video(), ff_default_get_video_buffer(), sub2video_prepare(), and video_thread().
| int avfilter_init_filter | ( | AVFilterContext * | filter, | |
| const char * | args, | |||
| void * | opaque | |||
| ) |
Initialize a filter.
| filter | the filter to initialize | |
| args | A string of parameters to use when initializing the filter. The format and meaning of this string varies by filter. | |
| opaque | Any extra non-string data needed by the filter. The meaning of this parameter varies by filter. |
Definition at line 606 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), create_filter(), and main().
| int avfilter_insert_filter | ( | AVFilterLink * | link, | |
| AVFilterContext * | filt, | |||
| unsigned | filt_srcpad_idx, | |||
| unsigned | filt_dstpad_idx | |||
| ) |
Insert a filter in the middle of an existing link.
| link | the link into which the filter should be inserted | |
| filt | the filter to be inserted | |
| filt_srcpad_idx | the input pad on the filter to connect | |
| filt_dstpad_idx | the output pad on the filter to connect |
Definition at line 169 of file avfilter.c.
Referenced by graph_insert_fifos(), insert_conv_filter(), and query_formats().
| const char* avfilter_license | ( | void | ) |
| int avfilter_link | ( | AVFilterContext * | src, | |
| unsigned | srcpad, | |||
| AVFilterContext * | dst, | |||
| unsigned | dstpad | |||
| ) |
Link two filters together.
| src | the source filter | |
| srcpad | index of the output pad on the source filter | |
| dst | the destination filter | |
| dstpad | index of the input pad on the destination filter |
Definition at line 120 of file avfilter.c.
Referenced by avfilter_graph_parse(), avfilter_insert_filter(), configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), configure_output_video_filter(), lavfi_read_header(), and link_filter().
| void avfilter_link_free | ( | AVFilterLink ** | link | ) |
Free the link in *link, and set its pointer to NULL.
Definition at line 151 of file avfilter.c.
Referenced by avfilter_free().
| void avfilter_link_set_closed | ( | AVFilterLink * | link, | |
| int | closed | |||
| ) |
| int avfilter_open | ( | AVFilterContext ** | filter_ctx, | |
| AVFilter * | filter, | |||
| const char * | inst_name | |||
| ) |
Create a filter instance.
| filter_ctx | put here a pointer to the created filter context on success, NULL on failure | |
| filter | the filter to create an instance of | |
| inst_name | Name to give to the new instance. Can be NULL for none. |
Definition at line 494 of file avfilter.c.
Referenced by avfilter_graph_create_filter(), create_filter(), and main().
| const char* avfilter_pad_get_name | ( | AVFilterPad * | pads, | |
| int | pad_idx | |||
| ) |
Get the name of an AVFilterPad.
| pads | an array of AVFilterPads | |
| pad_idx | index of the pad in the array it; is the caller's responsibility to ensure the index is valid |
Definition at line 617 of file avfilter.c.
| enum AVMediaType avfilter_pad_get_type | ( | AVFilterPad * | pads, | |
| int | pad_idx | |||
| ) |
Get the type of an AVFilterPad.
| pads | an array of AVFilterPads | |
| pad_idx | index of the pad in the array; it is the caller's responsibility to ensure the index is valid |
Definition at line 622 of file avfilter.c.
Referenced by configure_input_filter(), configure_output_filter(), init_input_filter(), init_output_filter(), and opt_output_file().
| int avfilter_process_command | ( | AVFilterContext * | filter, | |
| const char * | cmd, | |||
| const char * | arg, | |||
| char * | res, | |||
| int | res_len, | |||
| int | flags | |||
| ) |
Make the filter instance process a command.
It is recommended to use avfilter_graph_send_command().
Definition at line 382 of file avfilter.c.
Referenced by avfilter_graph_send_command(), and ff_start_frame().
| AVFilterBufferRef* avfilter_ref_buffer | ( | AVFilterBufferRef * | ref, | |
| int | pmask | |||
| ) |
Add a new reference to a buffer.
| ref | an existing reference to the buffer | |
| pmask | a bitmask containing the allowable permissions in the new reference |
Definition at line 51 of file buffer.c.
Referenced by default_start_frame(), end_frame(), ff_inplace_start_frame(), ff_null_start_frame(), filter_frame(), filter_samples(), push_frame(), request_frame(), return_audio_frame(), source_request_frame(), start_frame(), sub2video_push_ref(), try_start_frame(), and vf_next_put_image().
Register a filter.
This is only needed if you plan to use avfilter_get_by_name later to lookup the AVFilter structure by name. A filter can still by instantiated with avfilter_open even if it is not registered.
| filter | the filter to register |
Definition at line 410 of file avfilter.c.
Referenced by avfilter_register_all().
| void avfilter_register_all | ( | void | ) |
Initialize the filter system.
Register all builtin filters.
Definition at line 34 of file allfilters.c.
Referenced by lavfi_read_header(), and main().
| void avfilter_uninit | ( | void | ) |
Uninitialize the filter system.
Unregister all filters.
Definition at line 429 of file avfilter.c.
Referenced by do_exit(), and exit_program().
| void avfilter_unref_buffer | ( | AVFilterBufferRef * | ref | ) |
Remove a reference to a buffer.
If this is the last reference to the buffer, the buffer itself is also automatically freed.
| ref | reference to the buffer, may be NULL |
Definition at line 157 of file buffer.c.
Referenced by add_to_queue(), av_buffersink_read_samples(), av_buffersrc_add_frame(), av_buffersrc_add_ref(), avfilter_unref_bufferp(), channelmap_filter_samples(), common_uninit(), end_frame(), ff_buffersink_read_samples_compat(), ff_bufqueue_add(), ff_bufqueue_discard_all(), ff_filter_samples(), ff_filter_samples_framed(), ff_start_frame(), filter_samples(), flush_fifo(), frame_to_buf(), join_request_frame(), lavfi_read_packet(), output_frame(), process_frame(), reap_filters(), request_frame(), return_audio_frame(), start_frame(), try_start_frame(), try_start_next_frame(), uninit(), vf_next_put_image(), and write_to_fifo().
| void avfilter_unref_bufferp | ( | AVFilterBufferRef ** | ref | ) |
Remove a reference to a buffer and set the pointer to NULL.
If this is the last reference to the buffer, the buffer itself is also automatically freed.
| ref | pointer to the buffer reference |
Definition at line 178 of file buffer.c.
Referenced by alloc_picture(), avfilter_link_free(), clear_link(), config_output(), end_frame(), exit_program(), ff_inplace_start_frame(), ff_start_frame(), filter_samples(), join_free_buffer(), join_uninit(), main(), queue_picture(), request_frame(), start_frame(), stream_close(), uninit(), write_to_fifo(), and yae_clear().
| unsigned avfilter_version | ( | void | ) |
1.5.8