mirror of
https://github.com/FFmpeg/FFmpeg.git
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225 lines
6.9 KiB
C
225 lines
6.9 KiB
C
/*
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* Copyright (c) 2022 Paul B Mahol
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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 License
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* 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
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* GNU 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 License
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* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 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 "libavutil/tx.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "internal.h"
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#include <float.h>
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typedef struct AudioDialogueEnhancementContext {
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const AVClass *class;
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double original, enhance, voice;
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int fft_size;
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int overlap;
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void *window;
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float *window_float;
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double *window_double;
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float prev_vad_float;
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double prev_vad_double;
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AVFrame *in;
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AVFrame *in_frame;
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AVFrame *out_dist_frame;
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AVFrame *windowed_frame;
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AVFrame *windowed_out;
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AVFrame *windowed_prev;
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AVFrame *center_frame;
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int (*de_stereo)(AVFilterContext *ctx, AVFrame *out);
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AVTXContext *tx_ctx[2], *itx_ctx;
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av_tx_fn tx_fn, itx_fn;
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} AudioDialogueEnhanceContext;
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#define OFFSET(x) offsetof(AudioDialogueEnhanceContext, x)
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#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption dialoguenhance_options[] = {
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{ "original", "set original center factor", OFFSET(original), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "enhance", "set dialogue enhance factor",OFFSET(enhance), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 3, FLAGS },
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{ "voice", "set voice detection factor", OFFSET(voice), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 2,32, FLAGS },
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(dialoguenhance);
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *in_layout = NULL, *out_layout = NULL;
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int ret;
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if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_FLTP )) < 0 ||
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(ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBLP )) < 0 ||
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(ret = ff_set_common_formats (ctx , formats )) < 0 ||
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(ret = ff_add_channel_layout (&in_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
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(ret = ff_channel_layouts_ref(in_layout, &ctx->inputs[0]->outcfg.channel_layouts)) < 0 ||
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(ret = ff_add_channel_layout (&out_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_SURROUND)) < 0 ||
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(ret = ff_channel_layouts_ref(out_layout, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
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return ret;
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return ff_set_common_all_samplerates(ctx);
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}
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#define DEPTH 32
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#include "dialoguenhance_template.c"
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#undef DEPTH
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#define DEPTH 64
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#include "dialoguenhance_template.c"
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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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AudioDialogueEnhanceContext *s = ctx->priv;
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int ret;
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s->fft_size = inlink->sample_rate > 100000 ? 8192 : inlink->sample_rate > 50000 ? 4096 : 2048;
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s->overlap = s->fft_size / 4;
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s->in_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->center_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->out_dist_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->windowed_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->windowed_out = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->windowed_prev = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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if (!s->in_frame || !s->windowed_out || !s->windowed_prev ||
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!s->out_dist_frame || !s->windowed_frame || !s->center_frame)
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return AVERROR(ENOMEM);
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switch (inlink->format) {
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case AV_SAMPLE_FMT_FLTP:
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s->de_stereo = de_stereo_float;
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ret = de_tx_init_float(ctx);
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break;
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case AV_SAMPLE_FMT_DBLP:
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s->de_stereo = de_stereo_double;
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ret = de_tx_init_double(ctx);
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break;
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}
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return ret;
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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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AudioDialogueEnhanceContext *s = ctx->priv;
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AVFrame *out;
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int ret;
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out = ff_get_audio_buffer(outlink, s->overlap);
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if (!out) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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s->in = in;
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s->de_stereo(ctx, out);
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av_frame_copy_props(out, in);
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out->nb_samples = in->nb_samples;
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ret = ff_filter_frame(outlink, out);
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fail:
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av_frame_free(&in);
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s->in = NULL;
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return ret < 0 ? ret : 0;
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}
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static int activate(AVFilterContext *ctx)
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{
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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AudioDialogueEnhanceContext *s = ctx->priv;
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AVFrame *in = NULL;
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int ret = 0, status;
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int64_t pts;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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ret = ff_inlink_consume_samples(inlink, s->overlap, s->overlap, &in);
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if (ret < 0)
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return ret;
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if (ret > 0) {
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return filter_frame(inlink, in);
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} else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
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ff_outlink_set_status(outlink, status, pts);
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return 0;
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} else {
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if (ff_inlink_queued_samples(inlink) >= s->overlap) {
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ff_filter_set_ready(ctx, 10);
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} else if (ff_outlink_frame_wanted(outlink)) {
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ff_inlink_request_frame(inlink);
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}
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return 0;
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}
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AudioDialogueEnhanceContext *s = ctx->priv;
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av_freep(&s->window);
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av_frame_free(&s->in_frame);
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av_frame_free(&s->center_frame);
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av_frame_free(&s->out_dist_frame);
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av_frame_free(&s->windowed_frame);
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av_frame_free(&s->windowed_out);
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av_frame_free(&s->windowed_prev);
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av_tx_uninit(&s->tx_ctx[0]);
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av_tx_uninit(&s->tx_ctx[1]);
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av_tx_uninit(&s->itx_ctx);
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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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.config_props = config_input,
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},
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};
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const AVFilter ff_af_dialoguenhance = {
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.name = "dialoguenhance",
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.description = NULL_IF_CONFIG_SMALL("Audio Dialogue Enhancement."),
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.priv_size = sizeof(AudioDialogueEnhanceContext),
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.priv_class = &dialoguenhance_class,
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.uninit = uninit,
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(ff_audio_default_filterpad),
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FILTER_QUERY_FUNC(query_formats),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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.activate = activate,
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.process_command = ff_filter_process_command,
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};
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