mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Paul B Mahol <onemda@gmail.com>pull/288/head
Paul B Mahol
7 years ago
parent
9827bb88e7
commit
e28b1fa6e9
6 changed files with 856 additions and 1 deletions
@ -0,0 +1,753 @@ |
||||
/*
|
||||
* Copyright (c) 2018 Paul B Mahol |
||||
* |
||||
* This file is part of FFmpeg. |
||||
* |
||||
* FFmpeg is free software; you can redistribute it and/or |
||||
* modify it under the terms of the GNU Lesser General Public |
||||
* License as published by the Free Software Foundation; either |
||||
* version 2.1 of the License, or (at your option) any later version. |
||||
* |
||||
* FFmpeg is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||
* Lesser General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU Lesser General Public |
||||
* License along with FFmpeg; if not, write to the Free Software |
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||
*/ |
||||
|
||||
#include "libavutil/audio_fifo.h" |
||||
#include "libavutil/opt.h" |
||||
#include "avfilter.h" |
||||
#include "audio.h" |
||||
#include "formats.h" |
||||
|
||||
typedef struct DeclickChannel { |
||||
double *auxiliary; |
||||
double *detection; |
||||
double *acoefficients; |
||||
double *acorrelation; |
||||
double *tmp; |
||||
double *interpolated; |
||||
double *matrix; |
||||
int matrix_size; |
||||
double *vector; |
||||
int vector_size; |
||||
double *y; |
||||
int y_size; |
||||
uint8_t *click; |
||||
int *index; |
||||
unsigned *histogram; |
||||
int histogram_size; |
||||
} DeclickChannel; |
||||
|
||||
typedef struct AudioDeclickContext { |
||||
const AVClass *class; |
||||
|
||||
double w; |
||||
double overlap; |
||||
double threshold; |
||||
double ar; |
||||
double burst; |
||||
int method; |
||||
int nb_hbins; |
||||
|
||||
int is_declip; |
||||
int ar_order; |
||||
int nb_burst_samples; |
||||
int window_size; |
||||
int hop_size; |
||||
int overlap_skip; |
||||
|
||||
AVFrame *in; |
||||
AVFrame *out; |
||||
AVFrame *buffer; |
||||
AVFrame *is; |
||||
|
||||
DeclickChannel *chan; |
||||
|
||||
int64_t pts; |
||||
int nb_channels; |
||||
uint64_t nb_samples; |
||||
uint64_t detected_errors; |
||||
int samples_left; |
||||
|
||||
AVAudioFifo *fifo; |
||||
double *window_func_lut; |
||||
|
||||
int (*detector)(struct AudioDeclickContext *s, DeclickChannel *c, |
||||
double sigmae, double *detection, |
||||
double *acoefficients, uint8_t *click, int *index, |
||||
const double *src, double *dst); |
||||
} AudioDeclickContext; |
||||
|
||||
#define OFFSET(x) offsetof(AudioDeclickContext, x) |
||||
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
||||
|
||||
static const AVOption adeclick_options[] = { |
||||
{ "w", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF }, |
||||
{ "o", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF }, |
||||
{ "a", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 25, AF }, |
||||
{ "t", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 100, AF }, |
||||
{ "b", "set burst fusion", OFFSET(burst), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, 10, AF }, |
||||
{ "m", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, "m" }, |
||||
{ "a", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "m" }, |
||||
{ "s", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "m" }, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFILTER_DEFINE_CLASS(adeclick); |
||||
|
||||
static int query_formats(AVFilterContext *ctx) |
||||
{ |
||||
AVFilterFormats *formats = NULL; |
||||
AVFilterChannelLayouts *layouts = NULL; |
||||
static const enum AVSampleFormat sample_fmts[] = { |
||||
AV_SAMPLE_FMT_DBLP, |
||||
AV_SAMPLE_FMT_NONE |
||||
}; |
||||
int ret; |
||||
|
||||
formats = ff_make_format_list(sample_fmts); |
||||
if (!formats) |
||||
return AVERROR(ENOMEM); |
||||
ret = ff_set_common_formats(ctx, formats); |
||||
if (ret < 0) |
||||
return ret; |
||||
|
||||
layouts = ff_all_channel_counts(); |
||||
if (!layouts) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
ret = ff_set_common_channel_layouts(ctx, layouts); |
||||
if (ret < 0) |
||||
return ret; |
||||
|
||||
formats = ff_all_samplerates(); |
||||
return ff_set_common_samplerates(ctx, formats); |
||||
} |
||||
|
||||
static int config_input(AVFilterLink *inlink) |
||||
{ |
||||
AVFilterContext *ctx = inlink->dst; |
||||
AudioDeclickContext *s = ctx->priv; |
||||
int i; |
||||
|
||||
s->pts = AV_NOPTS_VALUE; |
||||
s->window_size = inlink->sample_rate * s->w / 1000.; |
||||
if (s->window_size < 100) |
||||
return AVERROR(EINVAL); |
||||
s->ar_order = FFMAX(s->window_size * s->ar / 100., 1); |
||||
s->nb_burst_samples = s->window_size * s->burst / 1000.; |
||||
s->hop_size = s->window_size * (1. - (s->overlap / 100.)); |
||||
if (s->hop_size < 1) |
||||
return AVERROR(EINVAL); |
||||
|
||||
s->window_func_lut = av_calloc(s->window_size, sizeof(*s->window_func_lut)); |
||||
if (!s->window_func_lut) |
||||
return AVERROR(ENOMEM); |
||||
for (i = 0; i < s->window_size; i++) |
||||
s->window_func_lut[i] = sin(M_PI * i / s->window_size) * |
||||
(1. - (s->overlap / 100.)) * M_PI_2; |
||||
|
||||
av_frame_free(&s->in); |
||||
av_frame_free(&s->out); |
||||
av_frame_free(&s->buffer); |
||||
av_frame_free(&s->is); |
||||
s->in = ff_get_audio_buffer(inlink, s->window_size); |
||||
s->out = ff_get_audio_buffer(inlink, s->window_size); |
||||
s->buffer = ff_get_audio_buffer(inlink, s->window_size * 2); |
||||
s->is = ff_get_audio_buffer(inlink, s->window_size); |
||||
if (!s->in || !s->out || !s->buffer || !s->is) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->window_size); |
||||
if (!s->fifo) |
||||
return AVERROR(ENOMEM); |
||||
s->overlap_skip = s->method ? (s->window_size - s->hop_size) / 2 : 0; |
||||
if (s->overlap_skip > 0) { |
||||
av_audio_fifo_write(s->fifo, (void **)s->in->extended_data, |
||||
s->overlap_skip); |
||||
} |
||||
|
||||
s->nb_channels = inlink->channels; |
||||
s->chan = av_calloc(inlink->channels, sizeof(*s->chan)); |
||||
if (!s->chan) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
for (i = 0; i < inlink->channels; i++) { |
||||
DeclickChannel *c = &s->chan[i]; |
||||
|
||||
c->detection = av_calloc(s->window_size, sizeof(*c->detection)); |
||||
c->auxiliary = av_calloc(s->ar_order + 1, sizeof(*c->auxiliary)); |
||||
c->acoefficients = av_calloc(s->ar_order + 1, sizeof(*c->acoefficients)); |
||||
c->acorrelation = av_calloc(s->ar_order + 1, sizeof(*c->acorrelation)); |
||||
c->tmp = av_calloc(s->ar_order, sizeof(*c->tmp)); |
||||
c->click = av_calloc(s->window_size, sizeof(*c->click)); |
||||
c->index = av_calloc(s->window_size, sizeof(*c->index)); |
||||
c->interpolated = av_calloc(s->window_size, sizeof(*c->interpolated)); |
||||
if (!c->auxiliary || !c->acoefficients || !c->detection || !c->click || |
||||
!c->index || !c->interpolated || !c->acorrelation || !c->tmp) |
||||
return AVERROR(ENOMEM); |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static void autocorrelation(const double *input, int order, int size, |
||||
double *output, double scale) |
||||
{ |
||||
int i, j; |
||||
|
||||
for (i = 0; i <= order; i++) { |
||||
double value = 0.; |
||||
|
||||
for (j = i; j < size; j++) |
||||
value += input[j] * input[j - i]; |
||||
|
||||
output[i] = value * scale; |
||||
} |
||||
} |
||||
|
||||
static double autoregression(const double *samples, int ar_order, |
||||
int nb_samples, double *k, double *r, double *a) |
||||
{ |
||||
double alpha; |
||||
int i, j; |
||||
|
||||
memset(a, 0, ar_order * sizeof(*a)); |
||||
|
||||
autocorrelation(samples, ar_order, nb_samples, r, 1. / nb_samples); |
||||
|
||||
/* Levinson-Durbin algorithm */ |
||||
k[0] = a[0] = -r[1] / r[0]; |
||||
alpha = r[0] * (1. - k[0] * k[0]); |
||||
for (i = 1; i < ar_order; i++) { |
||||
double epsilon = 0.; |
||||
|
||||
for (j = 0; j < i; j++) |
||||
epsilon += a[j] * r[i - j]; |
||||
epsilon += r[i + 1]; |
||||
|
||||
k[i] = -epsilon / alpha; |
||||
alpha *= (1. - k[i] * k[i]); |
||||
for (j = i - 1; j >= 0; j--) |
||||
k[j] = a[j] + k[i] * a[i - j - 1]; |
||||
for (j = 0; j <= i; j++) |
||||
a[j] = k[j]; |
||||
} |
||||
|
||||
k[0] = 1.; |
||||
for (i = 1; i <= ar_order; i++) |
||||
k[i] = a[i - 1]; |
||||
|
||||
return sqrt(alpha); |
||||
} |
||||
|
||||
static int isfinite_array(double *samples, int nb_samples) |
||||
{ |
||||
int i; |
||||
|
||||
for (i = 0; i < nb_samples; i++) |
||||
if (!isfinite(samples[i])) |
||||
return 0; |
||||
|
||||
return 1; |
||||
} |
||||
|
||||
static int find_index(int *index, int value, int size) |
||||
{ |
||||
int i, start, end; |
||||
|
||||
if ((value < index[0]) || (value > index[size - 1])) |
||||
return 1; |
||||
|
||||
i = start = 0; |
||||
end = size - 1; |
||||
|
||||
while (start <= end) { |
||||
i = (end + start) / 2; |
||||
if (index[i] == value) |
||||
return 0; |
||||
if (value < index[i]) |
||||
end = i - 1; |
||||
if (value > index[i]) |
||||
start = i + 1; |
||||
} |
||||
|
||||
return 1; |
||||
} |
||||
|
||||
static int factorization(double *matrix, int n) |
||||
{ |
||||
int i, j, k; |
||||
|
||||
for (i = 0; i < n; i++) { |
||||
const int in = i * n; |
||||
double value; |
||||
|
||||
value = matrix[in + i]; |
||||
for (j = 0; j < i; j++) |
||||
value -= matrix[j * n + j] * matrix[in + j] * matrix[in + j]; |
||||
|
||||
if (value == 0.) { |
||||
return -1; |
||||
} |
||||
|
||||
matrix[in + i] = value; |
||||
for (j = i + 1; j < n; j++) { |
||||
const int jn = j * n; |
||||
double x; |
||||
|
||||
x = matrix[jn + i]; |
||||
for (k = 0; k < i; k++) |
||||
x -= matrix[k * n + k] * matrix[in + k] * matrix[jn + k]; |
||||
matrix[jn + i] = x / matrix[in + i]; |
||||
} |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int do_interpolation(DeclickChannel *c, double *matrix, |
||||
double *vector, int n, double *out) |
||||
{ |
||||
int i, j, ret; |
||||
double *y; |
||||
|
||||
ret = factorization(matrix, n); |
||||
if (ret < 0) |
||||
return ret; |
||||
|
||||
av_fast_malloc(&c->y, &c->y_size, n * sizeof(*c->y)); |
||||
y = c->y; |
||||
if (!y) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
for (i = 0; i < n; i++) { |
||||
const int in = i * n; |
||||
double value; |
||||
|
||||
value = vector[i]; |
||||
for (j = 0; j < i; j++) |
||||
value -= matrix[in + j] * y[j]; |
||||
y[i] = value; |
||||
} |
||||
|
||||
for (i = n - 1; i >= 0; i--) { |
||||
out[i] = y[i] / matrix[i * n + i]; |
||||
for (j = i + 1; j < n; j++) |
||||
out[i] -= matrix[j * n + i] * out[j]; |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int interpolation(DeclickChannel *c, const double *src, int ar_order, |
||||
double *acoefficients, int *index, int nb_errors, |
||||
double *auxiliary, double *interpolated) |
||||
{ |
||||
double *vector, *matrix; |
||||
int i, j; |
||||
|
||||
av_fast_malloc(&c->matrix, &c->matrix_size, nb_errors * nb_errors * sizeof(*c->matrix)); |
||||
matrix = c->matrix; |
||||
if (!matrix) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
av_fast_malloc(&c->vector, &c->vector_size, nb_errors * sizeof(*c->vector)); |
||||
vector = c->vector; |
||||
if (!vector) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
autocorrelation(acoefficients, ar_order, ar_order + 1, auxiliary, 1.); |
||||
|
||||
for (i = 0; i < nb_errors; i++) { |
||||
const int im = i * nb_errors; |
||||
|
||||
for (j = i; j < nb_errors; j++) { |
||||
if (abs(index[j] - index[i]) <= ar_order) { |
||||
matrix[j * nb_errors + i] = matrix[im + j] = auxiliary[abs(index[j] - index[i])]; |
||||
} else { |
||||
matrix[j * nb_errors + i] = matrix[im + j] = 0; |
||||
} |
||||
} |
||||
} |
||||
|
||||
for (i = 0; i < nb_errors; i++) { |
||||
double value = 0.; |
||||
|
||||
for (j = -ar_order; j <= ar_order; j++) |
||||
if (find_index(index, index[i] - j, nb_errors)) |
||||
value -= src[index[i] - j] * auxiliary[abs(j)]; |
||||
|
||||
vector[i] = value; |
||||
} |
||||
|
||||
return do_interpolation(c, matrix, vector, nb_errors, interpolated); |
||||
} |
||||
|
||||
static int detect_clips(AudioDeclickContext *s, DeclickChannel *c, |
||||
double unused0, |
||||
double *unused1, double *unused2, |
||||
uint8_t *clip, int *index, |
||||
const double *src, double *dst) |
||||
{ |
||||
const double threshold = s->threshold; |
||||
double max_amplitude = 0; |
||||
unsigned *histogram; |
||||
int i, nb_clips = 0; |
||||
|
||||
av_fast_malloc(&c->histogram, &c->histogram_size, s->nb_hbins * sizeof(*c->histogram)); |
||||
if (!c->histogram) |
||||
return AVERROR(ENOMEM); |
||||
histogram = c->histogram; |
||||
memset(histogram, 0, sizeof(*histogram) * s->nb_hbins); |
||||
|
||||
for (i = 0; i < s->window_size; i++) { |
||||
const unsigned index = fmin(fabs(src[i]), 1) * (s->nb_hbins - 1); |
||||
|
||||
histogram[index]++; |
||||
dst[i] = src[i]; |
||||
clip[i] = 0; |
||||
} |
||||
|
||||
for (i = s->nb_hbins - 1; i > 1; i--) { |
||||
if (histogram[i]) { |
||||
if (histogram[i] / (double)FFMAX(histogram[i - 1], 1) > threshold) { |
||||
max_amplitude = i / (double)s->nb_hbins; |
||||
} |
||||
break; |
||||
} |
||||
} |
||||
|
||||
if (max_amplitude > 0.) { |
||||
for (i = 0; i < s->window_size; i++) { |
||||
clip[i] = fabs(src[i]) >= max_amplitude; |
||||
} |
||||
} |
||||
|
||||
memset(clip, 0, s->ar_order * sizeof(*clip)); |
||||
memset(clip + (s->window_size - s->ar_order), 0, s->ar_order * sizeof(*clip)); |
||||
|
||||
for (i = s->ar_order; i < s->window_size - s->ar_order; i++) |
||||
if (clip[i]) |
||||
index[nb_clips++] = i; |
||||
|
||||
return nb_clips; |
||||
} |
||||
|
||||
static int detect_clicks(AudioDeclickContext *s, DeclickChannel *c, |
||||
double sigmae, |
||||
double *detection, double *acoefficients, |
||||
uint8_t *click, int *index, |
||||
const double *src, double *dst) |
||||
{ |
||||
const double threshold = s->threshold; |
||||
int i, j, nb_clicks = 0, prev = -1; |
||||
|
||||
memset(detection, 0, s->window_size * sizeof(*detection)); |
||||
|
||||
for (i = s->ar_order; i < s->window_size; i++) { |
||||
for (j = 0; j <= s->ar_order; j++) { |
||||
detection[i] += acoefficients[j] * src[i - j]; |
||||
} |
||||
} |
||||
|
||||
for (i = 0; i < s->window_size; i++) { |
||||
click[i] = fabs(detection[i]) > sigmae * threshold; |
||||
dst[i] = src[i]; |
||||
} |
||||
|
||||
for (i = 0; i < s->window_size; i++) { |
||||
if (!click[i]) |
||||
continue; |
||||
|
||||
if (prev >= 0 && (i > prev + 1) && (i <= s->nb_burst_samples + prev)) |
||||
for (j = prev + 1; j < i; j++) |
||||
click[j] = 1; |
||||
prev = i; |
||||
} |
||||
|
||||
memset(click, 0, s->ar_order * sizeof(*click)); |
||||
memset(click + (s->window_size - s->ar_order), 0, s->ar_order * sizeof(*click)); |
||||
|
||||
for (i = s->ar_order; i < s->window_size - s->ar_order; i++) |
||||
if (click[i]) |
||||
index[nb_clicks++] = i; |
||||
|
||||
return nb_clicks; |
||||
} |
||||
|
||||
typedef struct ThreadData { |
||||
AVFrame *out; |
||||
} ThreadData; |
||||
|
||||
static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs) |
||||
{ |
||||
AudioDeclickContext *s = ctx->priv; |
||||
ThreadData *td = arg; |
||||
AVFrame *out = td->out; |
||||
const double *src = (const double *)s->in->extended_data[ch]; |
||||
double *is = (double *)s->is->extended_data[ch]; |
||||
double *dst = (double *)s->out->extended_data[ch]; |
||||
double *ptr = (double *)out->extended_data[ch]; |
||||
double *buf = (double *)s->buffer->extended_data[ch]; |
||||
const double *w = s->window_func_lut; |
||||
DeclickChannel *c = &s->chan[ch]; |
||||
double sigmae; |
||||
int j, ret; |
||||
|
||||
sigmae = autoregression(src, s->ar_order, s->window_size, c->acoefficients, c->acorrelation, c->tmp); |
||||
|
||||
if (isfinite_array(c->acoefficients, s->ar_order + 1)) { |
||||
double *interpolated = c->interpolated; |
||||
int *index = c->index; |
||||
int nb_errors; |
||||
|
||||
nb_errors = s->detector(s, c, sigmae, c->detection, c->acoefficients, |
||||
c->click, index, src, dst); |
||||
if (nb_errors > 0) { |
||||
ret = interpolation(c, src, s->ar_order, c->acoefficients, index, |
||||
nb_errors, c->auxiliary, interpolated); |
||||
if (ret < 0) |
||||
return ret; |
||||
|
||||
for (j = 0; j < nb_errors; j++) { |
||||
dst[index[j]] = interpolated[j]; |
||||
is[index[j]] = 1; |
||||
} |
||||
} |
||||
} else { |
||||
memcpy(dst, src, s->window_size * sizeof(*dst)); |
||||
} |
||||
|
||||
if (s->method == 0) { |
||||
for (j = 0; j < s->window_size; j++) |
||||
buf[j] += dst[j] * w[j]; |
||||
} else { |
||||
const int skip = s->overlap_skip; |
||||
|
||||
for (j = 0; j < s->hop_size; j++) |
||||
buf[j] = dst[skip + j]; |
||||
} |
||||
for (j = 0; j < s->hop_size; j++) |
||||
ptr[j] = buf[j]; |
||||
|
||||
memmove(buf, buf + s->hop_size, (s->window_size * 2 - s->hop_size) * sizeof(*buf)); |
||||
memmove(is, is + s->hop_size, (s->window_size - s->hop_size) * sizeof(*is)); |
||||
memset(buf + s->window_size * 2 - s->hop_size, 0, s->hop_size * sizeof(*buf)); |
||||
memset(is + s->window_size - s->hop_size, 0, s->hop_size * sizeof(*is)); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
||||
{ |
||||
AVFilterContext *ctx = inlink->dst; |
||||
AVFilterLink *outlink = ctx->outputs[0]; |
||||
AudioDeclickContext *s = ctx->priv; |
||||
AVFrame *out = NULL; |
||||
int ret = 0; |
||||
|
||||
if (s->pts == AV_NOPTS_VALUE) |
||||
s->pts = in->pts; |
||||
|
||||
ret = av_audio_fifo_write(s->fifo, (void **)in->extended_data, |
||||
in->nb_samples); |
||||
av_frame_free(&in); |
||||
|
||||
while (av_audio_fifo_size(s->fifo) >= s->window_size) { |
||||
int j, ch, detected_errors = 0; |
||||
ThreadData td; |
||||
|
||||
out = ff_get_audio_buffer(outlink, s->hop_size); |
||||
if (!out) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
ret = av_audio_fifo_peek(s->fifo, (void **)s->in->extended_data, |
||||
s->window_size); |
||||
if (ret < 0) |
||||
break; |
||||
|
||||
td.out = out; |
||||
ret = ctx->internal->execute(ctx, filter_channel, &td, NULL, inlink->channels); |
||||
if (ret < 0) |
||||
goto fail; |
||||
|
||||
for (ch = 0; ch < s->in->channels; ch++) { |
||||
double *is = (double *)s->is->extended_data[ch]; |
||||
|
||||
for (j = 0; j < s->hop_size; j++) { |
||||
if (is[j]) |
||||
detected_errors++; |
||||
} |
||||
} |
||||
|
||||
av_audio_fifo_drain(s->fifo, s->hop_size); |
||||
|
||||
if (s->samples_left > 0) |
||||
out->nb_samples = FFMIN(s->hop_size, s->samples_left); |
||||
|
||||
out->pts = s->pts; |
||||
s->pts += s->hop_size; |
||||
|
||||
s->detected_errors += detected_errors; |
||||
s->nb_samples += out->nb_samples * inlink->channels; |
||||
|
||||
ret = ff_filter_frame(outlink, out); |
||||
if (ret < 0) |
||||
break; |
||||
|
||||
if (s->samples_left > 0) { |
||||
s->samples_left -= s->hop_size; |
||||
if (s->samples_left <= 0) |
||||
av_audio_fifo_drain(s->fifo, av_audio_fifo_size(s->fifo)); |
||||
} |
||||
} |
||||
|
||||
fail: |
||||
if (ret < 0) |
||||
av_frame_free(&out); |
||||
return ret; |
||||
} |
||||
|
||||
static int request_frame(AVFilterLink *outlink) |
||||
{ |
||||
AVFilterContext *ctx = outlink->src; |
||||
AudioDeclickContext *s = ctx->priv; |
||||
int ret = 0; |
||||
|
||||
ret = ff_request_frame(ctx->inputs[0]); |
||||
|
||||
if (ret == AVERROR_EOF && av_audio_fifo_size(s->fifo) > 0) { |
||||
if (!s->samples_left) |
||||
s->samples_left = av_audio_fifo_size(s->fifo) - s->overlap_skip; |
||||
|
||||
if (s->samples_left > 0) { |
||||
AVFrame *in = ff_get_audio_buffer(outlink, s->window_size - s->samples_left); |
||||
if (!in) |
||||
return AVERROR(ENOMEM); |
||||
ret = filter_frame(ctx->inputs[0], in); |
||||
} |
||||
} |
||||
|
||||
return ret; |
||||
} |
||||
|
||||
static av_cold int init(AVFilterContext *ctx) |
||||
{ |
||||
AudioDeclickContext *s = ctx->priv; |
||||
|
||||
s->is_declip = !strcmp(ctx->filter->name, "adeclip"); |
||||
if (s->is_declip) { |
||||
s->detector = detect_clips; |
||||
} else { |
||||
s->detector = detect_clicks; |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static av_cold void uninit(AVFilterContext *ctx) |
||||
{ |
||||
AudioDeclickContext *s = ctx->priv; |
||||
int i; |
||||
|
||||
av_log(ctx, AV_LOG_INFO, "Detected %s in %"PRId64" of %"PRId64" samples (%g%%).\n", |
||||
s->is_declip ? "clips" : "clicks", s->detected_errors, |
||||
s->nb_samples, 100. * s->detected_errors / s->nb_samples); |
||||
|
||||
av_audio_fifo_free(s->fifo); |
||||
av_freep(&s->window_func_lut); |
||||
av_frame_free(&s->in); |
||||
av_frame_free(&s->out); |
||||
av_frame_free(&s->buffer); |
||||
av_frame_free(&s->is); |
||||
|
||||
if (s->chan) { |
||||
for (i = 0; i < s->nb_channels; i++) { |
||||
DeclickChannel *c = &s->chan[i]; |
||||
|
||||
av_freep(&c->detection); |
||||
av_freep(&c->auxiliary); |
||||
av_freep(&c->acoefficients); |
||||
av_freep(&c->acorrelation); |
||||
av_freep(&c->tmp); |
||||
av_freep(&c->click); |
||||
av_freep(&c->index); |
||||
av_freep(&c->interpolated); |
||||
av_freep(&c->matrix); |
||||
c->matrix_size = 0; |
||||
av_freep(&c->histogram); |
||||
c->histogram_size = 0; |
||||
av_freep(&c->vector); |
||||
c->vector_size = 0; |
||||
av_freep(&c->y); |
||||
c->y_size = 0; |
||||
} |
||||
} |
||||
av_freep(&s->chan); |
||||
s->nb_channels = 0; |
||||
} |
||||
|
||||
static const AVFilterPad inputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_AUDIO, |
||||
.filter_frame = filter_frame, |
||||
.config_props = config_input, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static const AVFilterPad outputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_AUDIO, |
||||
.request_frame = request_frame, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFilter ff_af_adeclick = { |
||||
.name = "adeclick", |
||||
.description = NULL_IF_CONFIG_SMALL("Remove impulsive noise from input audio."), |
||||
.query_formats = query_formats, |
||||
.priv_size = sizeof(AudioDeclickContext), |
||||
.priv_class = &adeclick_class, |
||||
.init = init, |
||||
.uninit = uninit, |
||||
.inputs = inputs, |
||||
.outputs = outputs, |
||||
.flags = AVFILTER_FLAG_SLICE_THREADS, |
||||
}; |
||||
|
||||
static const AVOption adeclip_options[] = { |
||||
{ "w", "set window size", OFFSET(w), AV_OPT_TYPE_DOUBLE, {.dbl=55}, 10, 100, AF }, |
||||
{ "o", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_DOUBLE, {.dbl=75}, 50, 95, AF }, |
||||
{ "a", "set autoregression order", OFFSET(ar), AV_OPT_TYPE_DOUBLE, {.dbl=8}, 0, 25, AF }, |
||||
{ "t", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=10}, 1, 100, AF }, |
||||
{ "n", "set histogram size", OFFSET(nb_hbins), AV_OPT_TYPE_INT, {.i64=1000}, 100, 9999, AF }, |
||||
{ "m", "set overlap method", OFFSET(method), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AF, "m" }, |
||||
{ "a", "overlap-add", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AF, "m" }, |
||||
{ "s", "overlap-save", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AF, "m" }, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFILTER_DEFINE_CLASS(adeclip); |
||||
|
||||
AVFilter ff_af_adeclip = { |
||||
.name = "adeclip", |
||||
.description = NULL_IF_CONFIG_SMALL("Remove clipping from input audio."), |
||||
.query_formats = query_formats, |
||||
.priv_size = sizeof(AudioDeclickContext), |
||||
.priv_class = &adeclip_class, |
||||
.init = init, |
||||
.uninit = uninit, |
||||
.inputs = inputs, |
||||
.outputs = outputs, |
||||
.flags = AVFILTER_FLAG_SLICE_THREADS, |
||||
}; |
||||
Loading…
Reference in new issue