257 lines
11 KiB
C
257 lines
11 KiB
C
/*
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* Copyright (c) 2016 The FFmpeg Project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/channel_layout.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "audio.h"
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#include "formats.h"
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typedef struct CrystalizerContext {
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const AVClass *class;
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float mult;
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int clip;
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AVFrame *prev;
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int (*filter[2][2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} CrystalizerContext;
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#define OFFSET(x) offsetof(CrystalizerContext, x)
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#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption crystalizer_options[] = {
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{ "i", "set intensity", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.0},-10, 10, A },
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{ "c", "enable clipping", OFFSET(clip), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(crystalizer);
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typedef struct ThreadData {
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void **d;
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void **p;
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const void **s;
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int nb_samples;
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int channels;
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float mult;
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} ThreadData;
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#define filters(fmt, type, inverse, clp, inverset, clip, one, clip_fn, packed) \
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static int filter_## inverse ##_## fmt ##_## clp(AVFilterContext *ctx, \
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void *arg, int jobnr,\
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int nb_jobs) \
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{ \
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ThreadData *td = arg; \
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void **d = td->d; \
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void **p = td->p; \
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const void **s = td->s; \
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const int nb_samples = td->nb_samples; \
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const int channels = td->channels; \
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const type mult = td->mult; \
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const type scale = one / (-mult + one); \
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const int start = (channels * jobnr) / nb_jobs; \
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const int end = (channels * (jobnr+1)) / nb_jobs; \
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\
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if (packed) { \
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type *prv = p[0]; \
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for (int c = start; c < end; c++) { \
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const type *src = s[0]; \
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type *dst = d[0]; \
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\
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for (int n = 0; n < nb_samples; n++) { \
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type current = src[c]; \
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\
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if (inverset) { \
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dst[c] = (current - prv[c] * mult) * scale; \
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prv[c] = dst[c]; \
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} else { \
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dst[c] = current + (current - prv[c]) * mult; \
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prv[c] = current; \
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} \
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if (clip) { \
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dst[c] = clip_fn(dst[c], -one, one); \
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} \
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\
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dst += channels; \
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src += channels; \
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} \
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} \
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} else { \
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for (int c = start; c < end; c++) { \
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const type *src = s[c]; \
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type *dst = d[c]; \
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type *prv = p[c]; \
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\
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for (int n = 0; n < nb_samples; n++) { \
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type current = src[n]; \
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\
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if (inverset) { \
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dst[n] = (current - prv[0] * mult) * scale; \
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prv[0] = dst[n]; \
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} else { \
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dst[n] = current + (current - prv[0]) * mult; \
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prv[0] = current; \
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} \
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if (clip) { \
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dst[n] = clip_fn(dst[n], -one, one); \
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} \
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} \
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} \
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} \
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\
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return 0; \
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}
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filters(flt, float, inverse, noclip, 1, 0, 1.f, av_clipf, 1)
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filters(flt, float, inverse, clip, 1, 1, 1.f, av_clipf, 1)
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filters(flt, float, noinverse, noclip, 0, 0, 1.f, av_clipf, 1)
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filters(flt, float, noinverse, clip, 0, 1, 1.f, av_clipf, 1)
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filters(fltp, float, inverse, noclip, 1, 0, 1.f, av_clipf, 0)
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filters(fltp, float, inverse, clip, 1, 1, 1.f, av_clipf, 0)
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filters(fltp, float, noinverse, noclip, 0, 0, 1.f, av_clipf, 0)
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filters(fltp, float, noinverse, clip, 0, 1, 1.f, av_clipf, 0)
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filters(dbl, double, inverse, noclip, 1, 0, 1.0, av_clipd, 1)
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filters(dbl, double, inverse, clip, 1, 1, 1.0, av_clipd, 1)
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filters(dbl, double, noinverse, noclip, 0, 0, 1.0, av_clipd, 1)
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filters(dbl, double, noinverse, clip, 0, 1, 1.0, av_clipd, 1)
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filters(dblp, double, inverse, noclip, 1, 0, 1.0, av_clipd, 0)
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filters(dblp, double, inverse, clip, 1, 1, 1.0, av_clipd, 0)
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filters(dblp, double, noinverse, noclip, 0, 0, 1.0, av_clipd, 0)
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filters(dblp, double, noinverse, clip, 0, 1, 1.0, av_clipd, 0)
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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CrystalizerContext *s = ctx->priv;
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switch (inlink->format) {
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case AV_SAMPLE_FMT_FLT:
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s->filter[0][0] = filter_inverse_flt_noclip;
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s->filter[1][0] = filter_noinverse_flt_noclip;
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s->filter[0][1] = filter_inverse_flt_clip;
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s->filter[1][1] = filter_noinverse_flt_clip;
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break;
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case AV_SAMPLE_FMT_FLTP:
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s->filter[0][0] = filter_inverse_fltp_noclip;
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s->filter[1][0] = filter_noinverse_fltp_noclip;
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s->filter[0][1] = filter_inverse_fltp_clip;
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s->filter[1][1] = filter_noinverse_fltp_clip;
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break;
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case AV_SAMPLE_FMT_DBL:
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s->filter[0][0] = filter_inverse_dbl_noclip;
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s->filter[1][0] = filter_noinverse_dbl_noclip;
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s->filter[0][1] = filter_inverse_dbl_clip;
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s->filter[1][1] = filter_noinverse_dbl_clip;
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break;
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case AV_SAMPLE_FMT_DBLP:
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s->filter[0][0] = filter_inverse_dblp_noclip;
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s->filter[1][0] = filter_noinverse_dblp_noclip;
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s->filter[0][1] = filter_inverse_dblp_clip;
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s->filter[1][1] = filter_noinverse_dblp_clip;
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break;
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default:
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return AVERROR_BUG;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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CrystalizerContext *s = ctx->priv;
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AVFrame *out;
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ThreadData td;
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if (!s->prev) {
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s->prev = ff_get_audio_buffer(inlink, 1);
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if (!s->prev) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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}
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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out = ff_get_audio_buffer(outlink, in->nb_samples);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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}
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td.d = (void **)out->extended_data;
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td.s = (const void **)in->extended_data;
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td.p = (void **)s->prev->extended_data;
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td.nb_samples = in->nb_samples;
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td.channels = in->ch_layout.nb_channels;
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td.mult = ctx->is_disabled ? 0.f : s->mult;
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ff_filter_execute(ctx, s->filter[td.mult >= 0.f][s->clip], &td, NULL,
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FFMIN(inlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
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if (out != in)
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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CrystalizerContext *s = ctx->priv;
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av_frame_free(&s->prev);
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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},
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};
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const AVFilter ff_af_crystalizer = {
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.name = "crystalizer",
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.description = NULL_IF_CONFIG_SMALL("Simple audio noise sharpening filter."),
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.priv_size = sizeof(CrystalizerContext),
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.priv_class = &crystalizer_class,
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.uninit = uninit,
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(outputs),
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FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP),
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.process_command = ff_filter_process_command,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
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AVFILTER_FLAG_SLICE_THREADS,
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};
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