36 #define RADIUS_MIN 0.1 37 #define RADIUS_MAX 5.0 39 #define STRENGTH_MIN -1.0 40 #define STRENGTH_MAX 1.0 42 #define THRESHOLD_MIN -30 43 #define THRESHOLD_MAX 30 62 #define OFFSET(x) offsetof(SmartblurContext, x) 63 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 101 "luma_radius:%f luma_strength:%f luma_threshold:%d " 102 "chroma_radius:%f chroma_strength:%f chroma_threshold:%d\n",
145 sws_filter.
lumH = sws_filter.
lumV = vec;
186 const uint8_t*
const src_array[4] = {src};
188 int src_linesize_array[4] = {src_linesize};
189 int dst_linesize_array[4] = {dst_linesize};
191 sws_scale(filter_context, src_array, src_linesize_array,
192 0, h, dst_array, dst_linesize_array);
195 for (y = 0; y <
h; ++y) {
196 for (x = 0; x <
w; ++x) {
197 orig = src[x + y * src_linesize];
198 filtered = dst[x + y * dst_linesize];
199 diff = orig - filtered;
202 if (diff > 2 * threshold)
203 dst[x + y * dst_linesize] = orig;
204 else if (diff > threshold)
206 dst[x + y * dst_linesize] = orig -
threshold;
208 if (-diff > 2 * threshold)
209 dst[x + y * dst_linesize] = orig;
210 else if (-diff > threshold)
212 dst[x + y * dst_linesize] = orig +
threshold;
216 }
else if (threshold < 0) {
217 for (y = 0; y <
h; ++y) {
218 for (x = 0; x <
w; ++x) {
219 orig = src[x + y * src_linesize];
220 filtered = dst[x + y * dst_linesize];
221 diff = orig - filtered;
224 if (diff <= -threshold)
225 dst[x + y * dst_linesize] = orig;
226 else if (diff <= -2 * threshold)
228 dst[x + y * dst_linesize] = filtered -
threshold;
230 if (diff >= threshold)
231 dst[x + y * dst_linesize] = orig;
232 else if (diff >= 2 * threshold)
234 dst[x + y * dst_linesize] = filtered +
threshold;
261 if (inpic->
data[2]) {
301 .
inputs = smartblur_inputs,
303 .priv_class = &smartblur_class,
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
AVFILTER_DEFINE_CLASS(smartblur)
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Main libavfilter public API header.
SwsVector * sws_getGaussianVec(double variance, double quality)
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality.
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.
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
#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.
int length
number of coefficients in the vector
#define AV_LOG_VERBOSE
Detailed information.
struct SwsContext * filter_context
A filter pad used for either input or output.
A link between two filters.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
static int config_props(AVFilterLink *inlink)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#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
void sws_scaleVec(SwsVector *a, double scalar)
Scale all the coefficients of a by the scalar value.
struct SwsContext * sws_getCachedContext(struct SwsContext *context, int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Check if context can be reused, otherwise reallocate a new one.
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
int w
agreed upon image width
static int alloc_sws_context(FilterParam *f, int width, int height, unsigned int flags)
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
static int query_formats(AVFilterContext *ctx)
static const AVOption smartblur_options[]
static const AVFilterPad outputs[]
int format
agreed upon media format
double * coeff
pointer to the list of coefficients
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...
static const AVFilterPad smartblur_inputs[]
void sws_freeVec(SwsVector *a)
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
static av_cold void uninit(AVFilterContext *ctx)
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
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Describe the class of an AVClass context structure.
const char * name
Filter name.
AVFilterLink ** outputs
array of pointers to output links
static enum AVPixelFormat pix_fmts[]
#define flags(name, subs,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
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
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
static void blur(uint8_t *dst, const int dst_linesize, const uint8_t *src, const int src_linesize, const int w, const int h, const int threshold, struct SwsContext *filter_context)
static av_always_inline int diff(const uint32_t a, const uint32_t b)
AVFilterContext * dst
dest filter
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
static const AVFilterPad smartblur_outputs[]
static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
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
AVPixelFormat
Pixel format.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
#define AV_CEIL_RSHIFT(a, b)
static av_cold int init(AVFilterContext *ctx)