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[79.124.17.100]) by mx.google.com with ESMTP id a18-v6si6884693wmb.218.2018.05.26.12.28.14; Sat, 26 May 2018 12:28:15 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=NvSdkM8M; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 77C1368A3B5; Sat, 26 May 2018 22:27:29 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wr0-f195.google.com (mail-wr0-f195.google.com [209.85.128.195]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 866BC68A30E for ; Sat, 26 May 2018 22:27:23 +0300 (EEST) Received: by mail-wr0-f195.google.com with SMTP id w3-v6so14259673wrl.12 for ; Sat, 26 May 2018 12:28:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=zQ+uXblCendG8isCCbFUczbKV1Ha9Q+aI6QpVu+Gs6s=; b=NvSdkM8MZM0GRva6W0MtQoFhN8uiABQ7UA3jVcpB3lprP5mfOzf1tz25zwBZP6Jlt+ OgUbk2R5j4maWwp8NNuHVAGLV+1olyBjwFlEkUrAijQJhTNIO2RuCmcwG7S91vt753iR Eo16mIoBKX+R/neZa+dhgP8Vxnkxj8sbVHXJrxtzhHPoTkl8otI/G3RwroD1kVD5P15j LB0w52bdVEWGq2FAAZ2xWUwnTCB4d5Lc4j1950mj/B/DKOnKdU4Q90g/2Kgd4VT4cW+w y5XNp1lEz/PKAdBJqJPcD5ePWW5W7Qxkm7IbpA6ZKSIK0VdgnInLfVCBZMiDJnXGxTbl VxJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=zQ+uXblCendG8isCCbFUczbKV1Ha9Q+aI6QpVu+Gs6s=; b=iFatWKRjhnOl0CWpzG47zuDL0n2IBgOz8QqMWmK4tMQA9Ezd4/8gQNDOajkaFbF4zw HW4R5hvoI8+IpC+UFyJdT8pep2dcRiX0Wzpsbv2ECQ/19eFyIeGMaZMsO+g1UKvEAEa4 mnCHdX3Y4KRICpXnjmsTPqV6qI4/dg1FOgku0d1ASa9YJE0gwG2XRUU813Rn+22NsORu ucwYWtCxNi9X6f2i+GEfq4BmrHigEwYCqhWZrTzi0FP1tkEjTiOnY0cbMfEStrkrJtkm JyJ+i6uP1LVc5RtzVZlX6JUKoFdNaqJ/mlSl4d7Ok0dhi2AKuZKCgqv8vxaXKcEvx5Ne 4wrw== X-Gm-Message-State: ALKqPwcC7LVrSbXKihI5kxOIR/e4HDPCYLgWQ2itRI4NgMeVHQRrM5Yj Z3Dq9xmL4zhvE+MqVQmHqUHZzw== X-Received: by 2002:a5d:408a:: with SMTP id o10-v6mr5123418wrp.133.1527362430062; Sat, 26 May 2018 12:20:30 -0700 (PDT) Received: from localhost.localdomain ([94.250.174.60]) by smtp.gmail.com with ESMTPSA id f6-v6sm20785258wrj.63.2018.05.26.12.20.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 26 May 2018 12:20:29 -0700 (PDT) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Sat, 26 May 2018 21:20:14 +0200 Message-Id: <20180526192014.23226-1-onemda@gmail.com> X-Mailer: git-send-email 2.11.0 Subject: [FFmpeg-devel] [PATCH] avfilter: add anlmeans audio filter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Paul B Mahol --- libavfilter/Makefile | 1 + libavfilter/af_anlmeans.c | 282 ++++++++++++++++++++++++++++++++++++++++++++++ libavfilter/allfilters.c | 1 + 3 files changed, 284 insertions(+) create mode 100644 libavfilter/af_anlmeans.c diff --git a/libavfilter/Makefile b/libavfilter/Makefile index c68ef05fdc..ac7e205b75 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -54,6 +54,7 @@ OBJS-$(CONFIG_AMERGE_FILTER) += af_amerge.o OBJS-$(CONFIG_AMETADATA_FILTER) += f_metadata.o OBJS-$(CONFIG_AMIX_FILTER) += af_amix.o OBJS-$(CONFIG_ANEQUALIZER_FILTER) += af_anequalizer.o +OBJS-$(CONFIG_ANLMEANS_FILTER) += af_anlmeans.o OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o OBJS-$(CONFIG_APAD_FILTER) += af_apad.o OBJS-$(CONFIG_APERMS_FILTER) += f_perms.o diff --git a/libavfilter/af_anlmeans.c b/libavfilter/af_anlmeans.c new file mode 100644 index 0000000000..01c4ca3239 --- /dev/null +++ b/libavfilter/af_anlmeans.c @@ -0,0 +1,282 @@ +/* + * 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 + +#include "libavutil/avassert.h" +#include "libavutil/audio_fifo.h" +#include "libavutil/opt.h" +#include "avfilter.h" +#include "audio.h" +#include "formats.h" + +#define SQR(x) ((x) * (x)) + +typedef struct AudioNLMeansContext { + const AVClass *class; + + double g; + double B; + double h; + double a; + double m; + int n; + int K; + int S; + + int N; + int hop_size; + + AVFrame *in; + + double *kernel; + + int64_t pts; + uint64_t nb_samples; + int samples_left; + + AVAudioFifo *fifo; +} AudioNLMeansContext; + +#define OFFSET(x) offsetof(AudioNLMeansContext, x) +#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption anlmeans_options[] = { + { "n", "set number of patches", OFFSET(n), AV_OPT_TYPE_INT, {.i64=1}, 1, 4, AF }, + { "K", "set patch radius", OFFSET(K), AV_OPT_TYPE_INT, {.i64=32}, 0, 4096, AF }, + { "S", "set research radius", OFFSET(S), AV_OPT_TYPE_INT, {.i64=64}, 1, 4096, AF }, + { "h", "set strength", OFFSET(h), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, FLT_MAX, AF }, + { "m", "set max allowed diff", OFFSET(m), AV_OPT_TYPE_DOUBLE, {.dbl=0.1}, 0, 2, AF }, + { "a", "set denoising amount", OFFSET(a), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, FLT_MAX, AF }, + { "B", "set smooth factor", OFFSET(B), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, FLT_MAX, AF }, + { "g", "set output gain", OFFSET(g), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, AF }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(anlmeans); + +static int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats = NULL; + AVFilterChannelLayouts *layouts = NULL; + static const enum AVSampleFormat sample_fmts[] = { + AV_SAMPLE_FMT_FLTP, + 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 void compute_kernel(double *kernel, int K, double B2) +{ + int k; + + for (k = 0; k <= 2 * K; k++) { + double kk = k - K; + + kernel[k] = exp(-(kk * kk) / B2); + } +} + +static int config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + AudioNLMeansContext *s = ctx->priv; + + s->m = SQR(s->m * 65536.); + s->pts = AV_NOPTS_VALUE; + s->N = s->n * s->K * 2 + 1 + (s->K + s->S) * 2; + s->hop_size = s->n * s->K * 2 + 1; + + av_frame_free(&s->in); + s->in = ff_get_audio_buffer(outlink, s->N); + if (!s->in) + return AVERROR(ENOMEM); + + s->fifo = av_audio_fifo_alloc(outlink->format, outlink->channels, s->N); + if (!s->fifo) + return AVERROR(ENOMEM); + + s->kernel = av_calloc(s->K * 2 + 1, sizeof(*s->kernel)); + if (!s->kernel) + return AVERROR(ENOMEM); + + compute_kernel(s->kernel, s->K, 1. / (s->B * s->B)); + + return 0; +} + +typedef struct ThreadData { + AVFrame *out; +} ThreadData; + +static double compute_distance(const double *kernel, + const float *f1, const float *f2, int K) +{ + double sum = 0.; + int k; + + for (k = -K; k <= K; k++) { + sum += kernel[k] * SQR(65536. * f1[k] - 65536. * f2[k]); + } + + return sum; +} + +static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs) +{ + AudioNLMeansContext *s = ctx->priv; + ThreadData *td = arg; + AVFrame *out = td->out; + const int S = s->S; + const int K = s->K; + const double m = s->m; + const double g = s->g; + const double *kernel = s->kernel + K; + const float *f = (const float *)(s->in->extended_data[ch]) + K; + const double sw = s->a / (s->h * s->h); + float *dst = (float *)out->extended_data[ch]; + int i, j; + + for (i = S; i < s->hop_size + S; i++) { + double P = 0., Q = 0.; + + for (j = i - S; j <= i + S; j++) { + double w, d2; + + d2 = compute_distance(kernel, f + i, f + j, K); + + if (d2 > m) + continue; + + w = exp(-d2 * sw); + P += w * f[j]; + Q += w; + } + + dst[i - S] = g * P / Q; + } + + return 0; +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + AudioNLMeansContext *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->N) { + 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->N); + if (ret < 0) + break; + + td.out = out; + ctx->internal->execute(ctx, filter_channel, &td, NULL, inlink->channels); + + 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; + + ret = ff_filter_frame(outlink, out); + if (ret < 0) + break; + } + + if (ret < 0) + av_frame_free(&out); + return ret; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + AudioNLMeansContext *s = ctx->priv; + + av_audio_fifo_free(s->fifo); + av_frame_free(&s->in); + av_freep(&s->kernel); +} + +static const AVFilterPad inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .config_props = config_output, + }, + { NULL } +}; + +AVFilter ff_af_anlmeans = { + .name = "anlmeans", + .description = NULL_IF_CONFIG_SMALL("Reduce broadband noise from input audio using Non-Local Means."), + .query_formats = query_formats, + .priv_size = sizeof(AudioNLMeansContext), + .priv_class = &anlmeans_class, + .uninit = uninit, + .inputs = inputs, + .outputs = outputs, + .flags = AVFILTER_FLAG_SLICE_THREADS, +}; diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index b44093d21b..90a033a28f 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -49,6 +49,7 @@ extern AVFilter ff_af_amerge; extern AVFilter ff_af_ametadata; extern AVFilter ff_af_amix; extern AVFilter ff_af_anequalizer; +extern AVFilter ff_af_anlmeans; extern AVFilter ff_af_anull; extern AVFilter ff_af_apad; extern AVFilter ff_af_aperms;