FFmpeg
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#include "libavutil/internal.h"
#include "avfilter.h"
#include "formats.h"
#include "framepool.h"
#include "framequeue.h"
#include "thread.h"
#include "version.h"
#include "video.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/internal.h"
Go to the source code of this file.
Data Structures | |
struct | AVFilterCommand |
struct | AVFilterPad |
A filter pad used for either input or output. More... | |
struct | AVFilterGraphInternal |
struct | AVFilterInternal |
Macros | |
#define | FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func) |
#define | AVFILTER_DEFINE_CLASS(fname) |
#define | FF_INLINK_IDX(link) ((int)((link)->dstpad - (link)->dst->input_pads)) |
Find the index of a link. More... | |
#define | FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads)) |
#define | FF_FILTER_FLAG_HWFRAME_AWARE (1 << 0) |
The filter is aware of hardware frames, and any hardware frame context should not be automatically propagated through it. More... | |
Functions | |
void | ff_avfilter_graph_update_heap (AVFilterGraph *graph, AVFilterLink *link) |
Update the position of a link in the age heap. More... | |
int | ff_fmt_is_in (int fmt, const int *fmts) |
Tell if an integer is contained in the provided -1-terminated list of integers. More... | |
av_warn_unused_result int | ff_parse_pixel_format (enum AVPixelFormat *ret, const char *arg, void *log_ctx) |
Parse a pixel format. More... | |
av_warn_unused_result int | ff_parse_sample_rate (int *ret, const char *arg, void *log_ctx) |
Parse a sample rate. More... | |
av_warn_unused_result int | ff_parse_time_base (AVRational *ret, const char *arg, void *log_ctx) |
Parse a time base. More... | |
av_warn_unused_result int | ff_parse_sample_format (int *ret, const char *arg, void *log_ctx) |
Parse a sample format name or a corresponding integer representation. More... | |
av_warn_unused_result int | ff_parse_channel_layout (int64_t *ret, int *nret, const char *arg, void *log_ctx) |
Parse a channel layout or a corresponding integer representation. More... | |
void | ff_update_link_current_pts (AVFilterLink *link, int64_t pts) |
void | ff_avfilter_link_set_in_status (AVFilterLink *link, int status, int64_t pts) |
Set the status field of a link from the source filter. More... | |
void | ff_avfilter_link_set_out_status (AVFilterLink *link, int status, int64_t pts) |
Set the status field of a link from the destination filter. More... | |
void | ff_command_queue_pop (AVFilterContext *filter) |
char * | ff_get_ref_perms_string (char *buf, size_t buf_size, int perms) |
void | ff_tlog_ref (void *ctx, AVFrame *ref, int end) |
void | ff_tlog_link (void *ctx, AVFilterLink *link, int end) |
int | ff_insert_pad (unsigned idx, unsigned *count, size_t padidx_off, AVFilterPad **pads, AVFilterLink ***links, AVFilterPad *newpad) |
Insert a new pad. More... | |
static int | ff_insert_inpad (AVFilterContext *f, unsigned index, AVFilterPad *p) |
Insert a new input pad for the filter. More... | |
static int | ff_insert_outpad (AVFilterContext *f, unsigned index, AVFilterPad *p) |
Insert a new output pad for the filter. More... | |
int | ff_request_frame (AVFilterLink *link) |
Request an input frame from the filter at the other end of the link. More... | |
int | ff_filter_frame (AVFilterLink *link, AVFrame *frame) |
Send a frame of data to the next filter. More... | |
AVFilterContext * | ff_filter_alloc (const AVFilter *filter, const char *inst_name) |
Allocate a new filter context and return it. More... | |
int | ff_filter_activate (AVFilterContext *filter) |
void | ff_filter_graph_remove_filter (AVFilterGraph *graph, AVFilterContext *filter) |
Remove a filter from a graph;. More... | |
int | ff_filter_graph_run_once (AVFilterGraph *graph) |
Run one round of processing on a filter graph. More... | |
static int | ff_norm_qscale (int qscale, int type) |
Normalize the qscale factor FIXME the H264 qscale is a log based scale, mpeg1/2 is not, the code below cannot be optimal. More... | |
int | ff_filter_get_nb_threads (AVFilterContext *ctx) |
Get number of threads for current filter instance. More... | |
int | ff_filter_process_command (AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags) |
Generic processing of user supplied commands that are set in the same way as the filter options. More... | |
int | ff_filter_init_hw_frames (AVFilterContext *avctx, AVFilterLink *link, int default_pool_size) |
Perform any additional setup required for hardware frames. More... | |
internal API functions
Definition in file internal.h.
Definition at line 239 of file internal.h.
#define AVFILTER_DEFINE_CLASS | ( | fname | ) |
Definition at line 314 of file internal.h.
Find the index of a link.
I.e. find i such that link == ctx->(in|out)puts[i]
Definition at line 328 of file internal.h.
Definition at line 329 of file internal.h.
#define FF_FILTER_FLAG_HWFRAME_AWARE (1 << 0) |
The filter is aware of hardware frames, and any hardware frame context should not be automatically propagated through it.
Definition at line 365 of file internal.h.
void ff_avfilter_graph_update_heap | ( | AVFilterGraph * | graph, |
AVFilterLink * | link | ||
) |
Update the position of a link in the age heap.
Definition at line 1391 of file avfiltergraph.c.
Referenced by ff_update_link_current_pts().
Tell if an integer is contained in the provided -1-terminated list of integers.
This is useful for determining (for instance) if an AVPixelFormat is in an array of supported formats.
fmt | provided format |
fmts | -1-terminated list of formats |
Definition at line 271 of file formats.c.
Referenced by config_input(), config_input_main(), config_input_overlay(), config_out_props(), and config_props().
av_warn_unused_result int ff_parse_pixel_format | ( | enum AVPixelFormat * | ret, |
const char * | arg, | ||
void * | log_ctx | ||
) |
av_warn_unused_result int ff_parse_sample_rate | ( | int * | ret, |
const char * | arg, | ||
void * | log_ctx | ||
) |
av_warn_unused_result int ff_parse_time_base | ( | AVRational * | ret, |
const char * | arg, | ||
void * | log_ctx | ||
) |
Parse a time base.
ret | unsigned AVRational pointer to where the value should be written |
arg | string to parse |
log_ctx | log context |
av_warn_unused_result int ff_parse_sample_format | ( | int * | ret, |
const char * | arg, | ||
void * | log_ctx | ||
) |
av_warn_unused_result int ff_parse_channel_layout | ( | int64_t * | ret, |
int * | nret, | ||
const char * | arg, | ||
void * | log_ctx | ||
) |
Parse a channel layout or a corresponding integer representation.
ret | 64bit integer pointer to where the value should be written. |
nret | integer pointer to the number of channels; if not NULL, then unknown channel layouts are accepted |
arg | string to parse |
log_ctx | log context |
void ff_update_link_current_pts | ( | AVFilterLink * | link, |
int64_t | pts | ||
) |
Definition at line 528 of file avfilter.c.
Referenced by consume_update(), ff_avfilter_link_set_out_status(), and ff_inlink_acknowledge_status().
void ff_avfilter_link_set_in_status | ( | AVFilterLink * | link, |
int | status, | ||
int64_t | pts | ||
) |
Set the status field of a link from the source filter.
The pts should reflect the timestamp of the status change, in link time base and relative to the frames timeline. In particular, for AVERROR_EOF, it should reflect the end time of the last frame.
Definition at line 211 of file avfilter.c.
Referenced by av_buffersrc_close(), ff_outlink_set_status(), and ff_request_frame_to_filter().
void ff_avfilter_link_set_out_status | ( | AVFilterLink * | link, |
int | status, | ||
int64_t | pts | ||
) |
Set the status field of a link from the destination filter.
The pts should probably be left unset (AV_NOPTS_VALUE).
Definition at line 224 of file avfilter.c.
Referenced by avfilter_link_set_closed(), ff_filter_frame_to_filter(), ff_inlink_set_status(), ff_request_frame(), and forward_status_change().
void ff_command_queue_pop | ( | AVFilterContext * | filter | ) |
Definition at line 94 of file avfilter.c.
Referenced by avfilter_free(), and ff_inlink_process_commands().
char* ff_get_ref_perms_string | ( | char * | buf, |
size_t | buf_size, | ||
int | perms | ||
) |
Definition at line 49 of file avfilter.c.
Referenced by ff_filter_frame().
void ff_tlog_link | ( | void * | ctx, |
AVFilterLink * | link, | ||
int | end | ||
) |
Definition at line 383 of file avfilter.c.
Referenced by ff_filter_frame(), ff_get_video_buffer(), ff_request_frame(), and ff_request_frame_to_filter().
int ff_insert_pad | ( | unsigned | idx, |
unsigned * | count, | ||
size_t | padidx_off, | ||
AVFilterPad ** | pads, | ||
AVFilterLink *** | links, | ||
AVFilterPad * | newpad | ||
) |
Insert a new pad.
idx | Insertion point. Pad is inserted at the end if this point is beyond the end of the list of pads. |
count | Pointer to the number of pads in the list |
padidx_off | Offset within an AVFilterLink structure to the element to increment when inserting a new pad causes link numbering to change |
pads | Pointer to the pointer to the beginning of the list of pads |
links | Pointer to the pointer to the beginning of the list of links |
newpad | The new pad to add. A copy is made when adding. |
Definition at line 103 of file avfilter.c.
Referenced by ff_insert_inpad(), and ff_insert_outpad().
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inlinestatic |
Insert a new input pad for the filter.
Definition at line 266 of file internal.h.
Referenced by decimate_init(), fieldmatch_init(), init(), join_init(), parse_definition(), and program_opencl_init().
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inlinestatic |
Insert a new output pad for the filter.
Definition at line 274 of file internal.h.
Referenced by init(), movie_common_init(), parse_definition(), and split_init().
int ff_request_frame | ( | AVFilterLink * | link | ) |
Request an input frame from the filter at the other end of the link.
This function must not be used by filters using the activate callback, use ff_link_set_frame_wanted() instead.
The input filter may pass the request on to its inputs, fulfill the request from an internal buffer or any other means specific to its function.
When the end of a stream is reached AVERROR_EOF is returned and no further frames are returned after that.
When a filter is unable to output a frame for example due to its sources being unable to do so or because it depends on external means pushing data into it then AVERROR(EAGAIN) is returned. It is important that a AVERROR(EAGAIN) return is returned all the way to the caller (generally eventually a user application) as this step may (but does not have to be) necessary to provide the input with the next frame.
If a request is successful then some progress has been made towards providing a frame on the link (through ff_filter_frame()). A filter that needs several frames to produce one is allowed to return success if one more frame has been processed but no output has been produced yet. A filter is also allowed to simply forward a success return value.
link | the input link |
Definition at line 407 of file avfilter.c.
Referenced by avfilter_graph_request_oldest(), ff_request_frame_to_filter(), ff_yadif_request_frame(), qsvdeint_request_frame(), request_frame(), request_frame_ref(), request_inlink(), and return_audio_frame().
int ff_filter_frame | ( | AVFilterLink * | link, |
AVFrame * | frame | ||
) |
Send a frame of data to the next filter.
link | the output link over which the data is being sent |
frame | a reference to the buffer of data being sent. The receiving filter will free this reference when it no longer needs it or pass it on to the next filter. |
Definition at line 1075 of file avfilter.c.
Referenced by activate(), addroi_filter_frame(), apply_filter(), av_buffersrc_add_frame_internal(), avgblur_opencl_filter_frame(), avgblur_vulkan_filter_frame(), blend_frame_for_dualinput(), channelmap_filter_frame(), chromaber_vulkan_filter_frame(), compand_delay(), compand_drain(), compand_nodelay(), convolution_opencl_filter_frame(), create_frame(), cudascale_filter_frame(), cudaupload_filter_frame(), default_filter_frame(), deint_vaapi_filter_frame(), do_blend(), do_convolve(), do_psnr(), do_ssim(), do_vmaf(), draw_spatial(), end_last_frame(), ff_qsvvpp_create(), ff_yadif_filter_frame(), filter(), filter_callback(), filter_frame(), filter_frame16(), filter_frame8(), filter_frame_ref(), fir_frame(), flush(), flush_frame(), geq_filter_frame(), gradients_request_frame(), headphone_frame(), hwdownload_filter_frame(), hwmap_filter_frame(), hwupload_filter_frame(), load_apply_palette(), misc_vaapi_filter_frame(), movie_push_frame(), neighbor_opencl_filter_frame(), nlmeans_opencl_filter_frame(), nppscale_filter_frame(), npptranspose_filter_frame(), oscilloscope_filter_frame(), output_frame(), output_single_frame(), overlay_cuda_blend(), overlay_opencl_blend(), overlay_vulkan_blend(), pixscope_filter_frame(), plot_freqs(), plot_spectrum_column(), pp_filter_frame(), procamp_vaapi_filter_frame(), process_frame(), program_opencl_run(), push_frame(), push_samples(), qsvscale_filter_frame(), request_frame(), return_audio_frame(), return_frame(), scale_vaapi_filter_frame(), scale_vulkan_filter_frame(), send_silence(), shuffleplanes_filter_frame(), sierpinski_request_frame(), source_request_frame(), tonemap_opencl_filter_frame(), tonemap_vaapi_filter_frame(), transpose_opencl_filter_frame(), transpose_vaapi_filter_frame(), try_push_frame(), unsharp_opencl_filter_frame(), write_frame(), xfade_activate(), xfade_frame(), and xfade_opencl_activate().
AVFilterContext* ff_filter_alloc | ( | const AVFilter * | filter, |
const char * | inst_name | ||
) |
Allocate a new filter context and return it.
filter | what filter to create an instance of |
inst_name | name to give to the new filter context |
Definition at line 645 of file avfilter.c.
Referenced by avfilter_graph_alloc_filter().
int ff_filter_activate | ( | AVFilterContext * | filter | ) |
Definition at line 1416 of file avfilter.c.
Referenced by ff_filter_graph_run_once().
void ff_filter_graph_remove_filter | ( | AVFilterGraph * | graph, |
AVFilterContext * | filter | ||
) |
Remove a filter from a graph;.
Definition at line 102 of file avfiltergraph.c.
Referenced by avfilter_free().
int ff_filter_graph_run_once | ( | AVFilterGraph * | graph | ) |
Run one round of processing on a filter graph.
Definition at line 1442 of file avfiltergraph.c.
Referenced by avfilter_graph_request_oldest(), get_frame_internal(), and push_frame().
Normalize the qscale factor FIXME the H264 qscale is a log based scale, mpeg1/2 is not, the code below cannot be optimal.
Definition at line 377 of file internal.h.
Referenced by filter(), and filter_frame().
int ff_filter_get_nb_threads | ( | AVFilterContext * | ctx | ) |
Get number of threads for current filter instance.
This number is always same or less than graph->nb_threads.
Definition at line 784 of file avfilter.c.
Referenced by activate(), apply_lut(), averageiir2d(), blend_frame(), blend_frames(), config_input(), config_output(), config_props(), convert_frame(), do_blend(), do_convolve(), draw_sierpinski(), filter(), filter_frame(), filter_frame16(), filter_frame8(), fir_frame(), gaussianiir2d(), geq_filter_frame(), gradients_request_frame(), nlmeans_plane(), open_stream(), output_frame(), process_frame(), scroll(), and xfade_frame().
int ff_filter_process_command | ( | AVFilterContext * | ctx, |
const char * | cmd, | ||
const char * | arg, | ||
char * | res, | ||
int | res_len, | ||
int | flags | ||
) |
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition at line 869 of file avfilter.c.
Referenced by oscilloscope_process_command(), and process_command().
int ff_filter_init_hw_frames | ( | AVFilterContext * | avctx, |
AVFilterLink * | link, | ||
int | default_pool_size | ||
) |
Perform any additional setup required for hardware frames.
link->hw_frames_ctx must be set before calling this function. Inside link->hw_frames_ctx, the fields format, sw_format, width and height must be set. If dynamically allocated pools are not supported, then initial_pool_size must also be set, to the minimum hardware frame pool size necessary for the filter to work (taking into account any frames which need to stored for use in operations as appropriate). If default_pool_size is nonzero, then it will be used as the pool size if no other modification takes place (this can be used to preserve compatibility).
Definition at line 1635 of file avfilter.c.
Referenced by config_output(), ff_vaapi_vpp_config_output(), and init_out_pool().