100 #define OFFSET(x) offsetof(SplitContext, x) 101 #define FLAGS (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM) 107 #define split_options options 110 #define asplit_options options 126 .priv_class = &split_class,
129 .
inputs = avfilter_vf_split_inputs,
147 .priv_class = &asplit_class,
150 .
inputs = avfilter_af_asplit_inputs,
This structure describes decoded (raw) audio or video data.
Main libavfilter public API header.
Memory handling functions.
static av_cold int init(AVCodecContext *avctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
enum AVMediaType type
AVFilterPad type.
static av_cold void split_uninit(AVFilterContext *ctx)
Macro definitions for various function/variable attributes.
static av_cold int split_init(AVFilterContext *ctx)
const char * name
Pad name.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
AVFilterPad * output_pads
array of output pads
static av_cold int uninit(AVCodecContext *avctx)
#define AVERROR_EOF
End of file.
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
A filter pad used for either input or output.
A link between two filters.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
unsigned nb_outputs
number of output pads
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
static const AVFilterPad avfilter_af_asplit_inputs[]
static char * split(char *message, char delim)
char * av_asprintf(const char *fmt,...)
common internal API header
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
static const AVFilterPad outputs[]
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
static const AVFilterPad avfilter_vf_split_inputs[]
AVFILTER_DEFINE_CLASS(split)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Describe the class of an AVClass context structure.
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
#define flags(name, subs,...)
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
static const AVOption options[]
AVFilterContext * dst
dest filter
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
const AVFilter * filter
the AVFilter of which this is an instance