42 #define OFFSET(x) offsetof(NoiseContext, x) 43 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 45 #define NOISE_PARAMS(name, x, param) \ 46 {#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \ 47 {#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \ 48 {#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \ 49 {#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \ 50 {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \ 51 {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, #name"_flags"}, \ 52 {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, #name"_flags"}, \ 53 {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, #name"_flags"}, \ 54 {"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, #name"_flags"}, 67 static const int8_t
patt[4] = { -1, 0, 1, 0 };
69 #define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0))) 84 for (i = 0, j = 0; i <
MAX_NOISE; i++, j++) {
88 noise[
i] = (
RAND_N(strength) - strength / 2) / 6
89 +
patt[j % 4] * strength * 0.25 / 3;
91 noise[
i] = (
RAND_N(strength) - strength / 2) / 3;
95 noise[
i] = (
RAND_N(strength) - strength / 2) / 2
96 +
patt[j % 4] * strength * 0.25;
98 noise[
i] =
RAND_N(strength) - strength / 2;
102 double x1, x2,
w, y1;
104 x1 = 2.0 *
av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
105 x2 = 2.0 *
av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
106 w = x1 * x1 + x2 * x2;
109 w = sqrt((-2.0 * log(w)) / w);
111 y1 *= strength / sqrt(3.0);
114 y1 +=
patt[j % 4] * strength * 0.35;
126 for (j = 0; j < 3; j++)
171 for (i = 0; i <
len; i++) {
172 int v = src[
i] + noise[
i];
179 int len,
const int8_t *
const *
shift)
182 const int8_t *src2 = (
const int8_t*)src;
184 for (i = 0; i <
len; i++) {
185 const int n = shift[0][
i] + shift[1][
i] + shift[2][
i];
186 dst[
i] = src2[
i] + ((n * src2[
i]) >> 7);
205 for (y = start; y < end; y++) {
206 const int ix = y & (
MAX_RES - 1);
216 n->
line_noise(dst + x, src + x, noise, w, shift);
230 for (plane = 0; plane < s->
nb_planes; plane++) {
232 const int start = (height * jobnr ) / nb_jobs;
233 const int end = (height * (jobnr+1)) / nb_jobs;
237 s->
bytewidth[plane], start, end, s, plane);
262 for (comp = 0; comp < 4; comp++) {
267 for (i = 0; i <
MAX_RES; i++) {
288 for (i = 0; i < 4; i++) {
299 for (i = 0; i < 4; i++) {
318 for (i = 0; i < 4; i++)
Context structure for the Lagged Fibonacci PRNG.
static const AVClass noise_class
static const AVFilterPad noise_inputs[]
static int shift(int a, int b)
void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Main libavfilter public API header.
static int config_input(AVFilterLink *inlink)
int h
agreed upon image height
static const AVOption noise_options[]
static int query_formats(AVFilterContext *ctx)
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.
static const AVFilterPad noise_outputs[]
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
AVFILTER_DEFINE_CLASS(noise)
static av_cold int init(AVFilterContext *ctx)
static void noise(uint8_t *dst, const uint8_t *src, int dst_linesize, int src_linesize, int width, int start, int end, NoiseContext *n, int comp)
void(* line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
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.
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
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
#define NOISE_PARAMS(name, x, param)
int w
agreed upon image width
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
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
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
int8_t * prev_shift[MAX_RES][3]
static const AVFilterPad outputs[]
int format
agreed upon media format
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Used for passing data between threads.
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 int8_t patt[4]
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
static av_cold int init_noise(NoiseContext *n, int comp)
const char * name
Filter name.
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
AVFilterLink ** outputs
array of pointers to output links
#define flags(name, subs,...)
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
avfilter_execute_func * execute
void(* line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
AVFilterContext * dst
dest filter
const AVPixFmtDescriptor * desc
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
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 depth
Number of bits in the component.
av_cold void ff_noise_init_x86(NoiseContext *n)
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
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 void uninit(AVFilterContext *ctx)