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43 #define OFFSET(x) offsetof(NoiseContext, x)
44 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
46 #define NOISE_PARAMS(name, x, param) \
47 {#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \
48 {#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
49 {#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
50 {#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, .unit = #name"_flags"}, \
51 {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, .unit = #name"_flags"}, \
52 {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, .unit = #name"_flags"}, \
53 {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, .unit = #name"_flags"}, \
54 {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, .unit = #name"_flags"}, \
55 {"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, .unit = #name"_flags"},
68 static const int8_t
patt[4] = { -1, 0, 1, 0 };
70 #define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))
90 +
patt[j % 4] * strength * 0.25 / 3;
97 +
patt[j % 4] * strength * 0.25;
103 double x1, x2,
w, y1;
107 w = x1 * x1 + x2 * x2;
110 w = sqrt((-2.0 *
log(
w)) /
w);
112 y1 *= strength / sqrt(3.0);
115 y1 +=
patt[j % 4] * strength * 0.35;
127 for (j = 0; j < 3; j++)
172 for (
i = 0;
i <
len;
i++) {
180 int len,
const int8_t *
const *
shift)
183 const int8_t *
src2 = (
const int8_t*)
src;
185 for (
i = 0;
i <
len;
i++) {
192 int dst_linesize,
int src_linesize,
206 for (y = start; y < end; y++) {
207 const int ix = y & (
MAX_RES - 1);
231 for (plane = 0; plane <
s->nb_planes; plane++) {
232 const int height =
s->height[plane];
233 const int start = (
height * jobnr ) / nb_jobs;
234 const int end = (
height * (jobnr+1)) / nb_jobs;
238 s->bytewidth[plane], start, end,
s, plane);
290 for (
i = 0;
i < 4;
i++) {
301 for (
i = 0;
i < 4;
i++) {
321 for (
i = 0;
i < 4;
i++)
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
static av_cold void uninit(AVFilterContext *ctx)
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
static const AVClass noise_class
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
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
static int config_input(AVFilterLink *inlink)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define FILTER_INPUTS(array)
This structure describes decoded (raw) audio or video data.
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)
const char * name
Filter name.
A link between two filters.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
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.
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
static av_cold int init(AVFilterContext *ctx)
A filter pad used for either input or output.
static av_cold int init_noise(NoiseContext *n, int comp)
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
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 unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
#define AV_CEIL_RSHIFT(a, b)
#define FILTER_OUTPUTS(array)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
void(* line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
const AVFilter ff_vf_noise
av_cold void ff_noise_init_x86(NoiseContext *n)
Context structure for the Lagged Fibonacci PRNG.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int shift(int a, int b)
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
int8_t * prev_shift[MAX_RES][3]
static const AVFilterPad noise_inputs[]
#define NOISE_PARAMS(name, x, param)
AVFILTER_DEFINE_CLASS(noise)
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
#define i(width, name, range_min, range_max)
int w
agreed upon image width
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Used for passing data between threads.
const char * name
Pad name.
void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
int h
agreed upon image height
int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
static const int8_t patt[4]
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
void(* line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
#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...
#define flags(name, subs,...)
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
static const AVOption noise_options[]
static int query_formats(AVFilterContext *ctx)
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
#define FILTER_QUERY_FUNC(func)