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;
116 y1 = av_clipf(y1, -128, 127);
126 for (j = 0; j < 3; j++)
171 for (i = 0; i <
len; i++) {
172 int v = src[i] + noise[i];
174 dst[i] = av_clip_uint8(v);
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);
191 int dst_linesize,
int src_linesize,
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++)
349 .priv_class = &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)
static enum AVSampleFormat formats[]
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
struct AVFilterGraph * graph
filtergraph this filter belongs to
#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 end(AVCodecContext *avctx)
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)
int nb_threads
Maximum number of threads used by filters in this graph.
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_...
int8_t * prev_shift[MAX_RES][3]
static const AVFilterPad outputs[]
int format
agreed upon media format
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static const AVFilterPad inputs[]
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
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.
BYTE int const BYTE int int int height
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
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
void(* line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
void(* line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
avfilter_execute_func * execute
AVFilterContext * dst
dest filter
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
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.
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)