33 #define WEIGHT_LUT_NBITS 20 34 #define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS) 36 #define SQR(x) ((x) * (x)) 74 #define OFFSET(x) offsetof(AudioNLMeansContext, x) 75 #define AFT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM 124 for (
int k = -K; k <=
K; k++)
125 distance +=
SQR(f1[k] - f2[k]);
131 ptrdiff_t
S, ptrdiff_t
K,
132 ptrdiff_t
i, ptrdiff_t jj)
136 for (
int j = jj; j < jj +
S; j++, v++)
137 cache[v] += -
SQR(f[i - K - 1] - f[j - K - 1]) +
SQR(f[i + K] - f[j + K]);
153 int newK, newS, newH, newN;
160 newN = newH + (newK + newS) * 2;
168 s->
cache = new_cache;
235 const int om = s->
om;
238 const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->
a);
242 for (
int i = S;
i < s->
H +
S;
i++) {
243 float P = 0.f, Q = 0.f;
247 for (
int j =
i - S; j <=
i +
S; j++) {
257 for (
int j = 0; j < 2 * S && !ctx->
is_disabled; j++) {
259 unsigned weight_lut_idx;
262 if (distance < 0.f) {
272 P += w * f[
i - S + j + (j >=
S)];
306 wanted = (available / s->
H) * s->
H;
308 if (wanted >= s->
H && available >= s->
N) {
314 while (available >= s->
N) {
368 char *res,
int res_len,
int flags)
413 .description =
NULL_IF_CONFIG_SMALL(
"Reduce broadband noise from stream using Non-Local Means."),
416 .priv_class = &anlmdn_class,
static const AVOption anlmdn_options[]
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
This structure describes decoded (raw) audio or video data.
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static float compute_distance_ssd_c(const float *f1, const float *f2, ptrdiff_t K)
Main libavfilter public API header.
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
void ff_anlmdn_init(AudioNLMDNDSPContext *dsp)
int is_disabled
the enabled state from the last expression evaluation
const char * name
Pad name.
AVFilterLink ** inputs
array of pointers to input links
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
#define AVERROR_EOF
End of file.
static int config_output(AVFilterLink *outlink)
float(* compute_distance_ssd)(const float *f1, const float *f2, ptrdiff_t K)
A filter pad used for either input or output.
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
A link between two filters.
int sample_rate
samples per second
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
void ff_anlmdn_init_x86(AudioNLMDNDSPContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options...
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 AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
AVRational time_base
Define the time base used by the PTS of the frames/samples which will pass through this link...
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVFilterPad outputs[]
Context for an Audio FIFO Buffer.
static float distance(float x, float y, int band)
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
#define AV_TIME_BASE
Internal time base represented as integer.
float weight_lut[WEIGHT_LUT_SIZE]
static int query_formats(AVFilterContext *ctx)
static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
AVFilterContext * src
source filter
static const AVFilterPad inputs[]
static int config_filter(AVFilterContext *ctx)
int format
agreed upon media format
A list of supported channel layouts.
AVFILTER_DEFINE_CLASS(anlmdn)
void(* compute_cache)(float *cache, const float *f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj)
AVSampleFormat
Audio sample formats.
static void compute_cache_c(float *cache, const float *f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj)
static float smooth(DeshakeOpenCLContext *deshake_ctx, float *gauss_kernel, int length, float max_val, AVFifoBuffer *values)
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
const char * name
Filter name.
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
AVFilterLink ** outputs
array of pointers to output links
enum MovChannelLayoutTag * layouts
static int request_frame(AVFilterLink *outlink)
#define flags(name, subs,...)
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
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
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
Drain data from an AVAudioFifo.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static av_cold void uninit(AVFilterContext *ctx)
int channels
Number of channels.
avfilter_execute_func * execute
AVFilterContext * dst
dest filter
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
static enum AVSampleFormat sample_fmts[]
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
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
uint8_t ** extended_data
pointers to the data planes/channels.
int nb_samples
number of audio samples (per channel) described by this frame
#define AV_NOPTS_VALUE
Undefined timestamp value.