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58 for (
i = 0;
i < nb_planes;
i++) {
84 second->
pts += inpicref->
pts;
112 *out_pts =
s->second->pts +=
pts;
139 int64_t out_pts =
pts;
175 .
name =
"separatefields",
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
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
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
#define AVERROR_EOF
End of file.
static int flush_frame(AVFilterLink *outlink, int64_t pts, int64_t *out_pts)
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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
int top_field_first
If the content is interlaced, is top field displayed first.
const char * name
Filter name.
A link between two filters.
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
A filter pad used for either input or output.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0,...
static int activate(AVFilterContext *ctx)
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
static const AVFilterPad separatefields_outputs[]
#define FILTER_INPUTS(array)
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
#define AV_NOPTS_VALUE
Undefined timestamp value.
AVFilterContext * src
source filter
FF_FILTER_FORWARD_WANTED(outlink, inlink)
int interlaced_frame
The content of the picture is interlaced.
#define i(width, name, range_min, range_max)
static const AVFilterPad separatefields_inputs[]
int w
agreed upon image width
const char * name
Pad name.
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
const AVFilter ff_vf_separatefields
static av_cold void uninit(AVFilterContext *ctx)
int h
agreed upon image height
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link.
static int config_props_output(AVFilterLink *outlink)
#define FILTER_OUTPUTS(array)
static void extract_field(AVFrame *frame, int nb_planes, int type)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.