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47 const int slice_start = (
frame->height * jobnr) / nb_jobs;
50 const uint8_t *luma =
frame->data[0] + slice_start *
frame->linesize[0];
52 const int w =
s->white;
53 const int b =
s->black;
56 for (y = slice_start; y <
slice_end; y++) {
57 for (x = 0; x <
frame->width; x++) {
58 if (luma[x] >=
b && luma[x] <=
w) {
60 }
else if (luma[x] >
b - so && luma[x] <
w + so) {
62 alpha[x] = 255 - (luma[x] -
b + so) * 255 / so;
64 alpha[x] = (luma[x] -
w) * 255 / so;
68 luma +=
frame->linesize[0];
79 const int slice_start = (
frame->height * jobnr) / nb_jobs;
81 uint16_t *
alpha = (uint16_t *)(
frame->data[3] + slice_start *
frame->linesize[3]);
82 const uint16_t *luma = (
const uint16_t *)(
frame->data[0] + slice_start *
frame->linesize[0]);
84 const int w =
s->white;
85 const int b =
s->black;
89 for (y = slice_start; y <
slice_end; y++) {
90 for (x = 0; x <
frame->width; x++) {
91 if (luma[x] >=
b && luma[x] <=
w) {
93 }
else if (luma[x] >
b - so && luma[x] <
w + so) {
95 alpha[x] = m - (luma[x] -
b + so) * m / so;
97 alpha[x] = (luma[x] -
w) * m / so;
101 luma +=
frame->linesize[0] / 2;
115 depth =
desc->comp[0].depth;
120 s->so =
s->softness * 255;
122 s->max = (1 << depth) - 1;
123 s->white =
av_clip((
s->threshold +
s->tolerance) *
s->max, 0,
s->max);
124 s->black =
av_clip((
s->threshold -
s->tolerance) *
s->max, 0,
s->max);
126 s->so =
s->softness *
s->max;
155 char *res,
int res_len,
int flags)
183 #define OFFSET(x) offsetof(LumakeyContext, x)
184 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
199 .priv_class = &lumakey_class,
#define AV_PIX_FMT_YUVA422P16
AVPixelFormat
Pixel format.
static int do_lumakey_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
#define FILTER_PIXFMTS_ARRAY(array)
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
#define AV_PIX_FMT_YUVA422P9
This structure describes decoded (raw) audio or video data.
#define AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P10
static int filter_frame(AVFilterLink *link, AVFrame *frame)
const char * name
Filter name.
A link between two filters.
#define AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA444P16
A filter pad used for either input or output.
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
static const AVFilterPad lumakey_inputs[]
#define AV_PIX_FMT_YUVA444P12
#define FILTER_INPUTS(array)
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
Describe the class of an AVClass context structure.
int(* do_lumakey_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static const AVFilterPad lumakey_outputs[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int do_lumakey_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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.
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
#define AV_PIX_FMT_YUVA444P10
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
const char * name
Pad name.
const AVFilter ff_vf_lumakey
static enum AVPixelFormat pixel_fmts[]
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
#define AV_PIX_FMT_YUVA444P9
static int config_input(AVFilterLink *inlink)
#define AV_PIX_FMT_YUVA422P12
static const AVOption lumakey_options[]
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
static const int16_t alpha[]
#define FILTER_OUTPUTS(array)
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
#define flags(name, subs,...)
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
AVFILTER_DEFINE_CLASS(lumakey)
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
#define AVFILTERPAD_FLAG_NEEDS_WRITABLE
The filter expects writable frames from its input link, duplicating data buffers if needed.