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 AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM 76 #define AFT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM 125 for (
int k = -K; k <=
K; k++)
126 distance +=
SQR(f1[k] - f2[k]);
132 ptrdiff_t
S, ptrdiff_t
K,
133 ptrdiff_t
i, ptrdiff_t jj)
137 for (
int j = jj; j < jj +
S; j++, v++)
138 cache[v] += -
SQR(f[i - K - 1] - f[j - K - 1]) +
SQR(f[i + K] - f[j + K]);
162 s->
N = s->
H + (s->
K + s->
S) * 2;
202 const int om = s->
om;
205 const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->
a);
209 for (
int i = S;
i < s->
H +
S;
i++) {
210 float P = 0.f, Q = 0.f;
214 for (
int j =
i - S; j <=
i +
S; j++) {
224 for (
int j = 0; j < 2 * S && !ctx->
is_disabled; j++) {
226 unsigned weight_lut_idx;
229 if (distance < 0.f) {
239 P += w * f[
i - S + j + (j >=
S)];
262 int available, wanted, ret;
273 wanted = (available / s->
H) * s->
H;
275 if (wanted >= s->
H && available >= s->
N) {
281 while (available >= s->
N) {
364 .description =
NULL_IF_CONFIG_SMALL(
"Reduce broadband noise from stream using Non-Local Means."),
367 .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 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.
#define i(width, name, range_min, range_max)
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[]
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.
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[]
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
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.