64 for (i = 0; i < 4; i ++) {
65 int vsub = i == 1 || i == 2 ? flip->
vsub : 0;
82 for (i = 0; i < 4; i ++) {
83 int vsub = i == 1 || i == 2 ? flip->
vsub : 0;
117 .priv_class = &vflip_class,
118 .
inputs = avfilter_vf_vflip_inputs,
119 .
outputs = avfilter_vf_vflip_outputs,
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
Main libavfilter public API header.
int h
agreed upon image height
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
const char * name
Pad name.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static const AVFilterPad avfilter_vf_vflip_inputs[]
static int filter_frame(AVFilterLink *link, AVFrame *frame)
static const AVOption vflip_options[]
A filter pad used for either input or output.
A link between two filters.
#define i(width, name, range_min, range_max)
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
static void flip(AVCodecContext *avctx, AVFrame *frame)
#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
AVFILTER_DEFINE_CLASS(vflip)
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
static int config_input(AVFilterLink *link)
static const AVFilterPad outputs[]
int format
agreed upon media format
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
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.
const char * name
Filter name.
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 link
AVFilterLink ** outputs
array of pointers to output links
#define flags(name, subs,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
AVFilterContext * dst
dest filter
static const AVFilterPad avfilter_vf_vflip_outputs[]
static AVFrame * get_video_buffer(AVFilterLink *link, int w, int h)
int vsub
vertical chroma subsampling
#define AV_CEIL_RSHIFT(a, b)