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53 #define OFFSET(x) offsetof(ELBGFilterContext, x)
54 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
59 {
"nb_steps",
"set max number of steps used to compute the mapping",
OFFSET(max_steps_nb),
AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX,
FLAGS },
60 {
"n",
"set max number of steps used to compute the mapping",
OFFSET(max_steps_nb),
AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX,
FLAGS },
110 #define NB_COMPONENTS 4
161 for (j = 0; j <
inlink->w; j++) {
168 p0 +=
frame->linesize[0];
192 pal = (uint32_t *)
out->data[1];
193 p0 = (uint8_t *)
out->data[0];
206 for (j = 0; j <
inlink->w; j++, p++) {
209 p0 +=
out->linesize[0];
221 for (j = 0; j <
inlink->w; j++) {
224 p[g_idx] = elbg->
codebook[cb_idx+1];
225 p[r_idx] = elbg->
codebook[cb_idx+2];
229 p0 +=
frame->linesize[0];
267 .priv_class = &elbg_class,
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVPixelFormat
Pixel format.
int * codeword_closest_codebook_idxs
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
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
#define u(width, name, range_min, range_max)
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)
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.
#define FILTER_QUERY_FUNC(func)
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
const AVPixFmtDescriptor * pix_desc
const char * name
Filter name.
A link between two filters.
uint32_t av_get_random_seed(void)
Get a seed to use in conjunction with random functions.
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad elbg_inputs[]
A filter pad used for either input or output.
int avpriv_elbg_do(ELBGContext **elbgp, int *points, int dim, int numpoints, int *codebook, int num_cb, int max_steps, int *closest_cb, AVLFG *rand_state, uintptr_t flags)
Implementation of the Enhanced LBG Algorithm Based on the paper "Neural Networks 14:1219-1237" that c...
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const AVFilter ff_vf_elbg
static const AVFilterPad elbg_outputs[]
static enum AVPixelFormat pix_fmts[]
#define FILTER_INPUTS(array)
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
static av_cold int init(AVFilterContext *ctx)
#define av_realloc_f(p, o, n)
Describe the class of an AVClass context structure.
uint8_t nb_components
The number of components each pixel has, (1-4)
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Context structure for the Lagged Fibonacci PRNG.
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
av_cold void avpriv_elbg_free(ELBGContext **elbgp)
Free an ELBGContext and reset the pointer to it.
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
static const AVOption elbg_options[]
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
#define i(width, name, range_min, range_max)
int w
agreed upon image width
const char * name
Pad name.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
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
int h
agreed upon image height
static av_cold void uninit(AVFilterContext *ctx)
AVFILTER_DEFINE_CLASS(elbg)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
static int config_input(AVFilterLink *inlink)
#define FILTER_OUTPUTS(array)
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
#define AVFILTERPAD_FLAG_NEEDS_WRITABLE
The filter expects writable frames from its input link, duplicating data buffers if needed.