| /* |
| * Copyright (c) 2022 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/channel_layout.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/tx.h" |
| #include "audio.h" |
| #include "avfilter.h" |
| #include "filters.h" |
| #include "formats.h" |
| #include "internal.h" |
| |
| #include <float.h> |
| |
| typedef struct AudioDialogueEnhancementContext { |
| const AVClass *class; |
| |
| double original, enhance, voice; |
| |
| int fft_size; |
| int overlap; |
| |
| void *window; |
| float *window_float; |
| double *window_double; |
| float prev_vad_float; |
| double prev_vad_double; |
| |
| AVFrame *in; |
| AVFrame *in_frame; |
| AVFrame *out_dist_frame; |
| AVFrame *windowed_frame; |
| AVFrame *windowed_out; |
| AVFrame *windowed_prev; |
| AVFrame *center_frame; |
| |
| int (*de_stereo)(AVFilterContext *ctx, AVFrame *out); |
| |
| AVTXContext *tx_ctx[2], *itx_ctx; |
| av_tx_fn tx_fn, itx_fn; |
| } AudioDialogueEnhanceContext; |
| |
| #define OFFSET(x) offsetof(AudioDialogueEnhanceContext, x) |
| #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption dialoguenhance_options[] = { |
| { "original", "set original center factor", OFFSET(original), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS }, |
| { "enhance", "set dialogue enhance factor",OFFSET(enhance), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 3, FLAGS }, |
| { "voice", "set voice detection factor", OFFSET(voice), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 2,32, FLAGS }, |
| {NULL} |
| }; |
| |
| AVFILTER_DEFINE_CLASS(dialoguenhance); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| AVFilterFormats *formats = NULL; |
| AVFilterChannelLayouts *in_layout = NULL, *out_layout = NULL; |
| int ret; |
| |
| if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_FLTP )) < 0 || |
| (ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBLP )) < 0 || |
| (ret = ff_set_common_formats (ctx , formats )) < 0 || |
| (ret = ff_add_channel_layout (&in_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 || |
| (ret = ff_channel_layouts_ref(in_layout, &ctx->inputs[0]->outcfg.channel_layouts)) < 0 || |
| (ret = ff_add_channel_layout (&out_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_SURROUND)) < 0 || |
| (ret = ff_channel_layouts_ref(out_layout, &ctx->outputs[0]->incfg.channel_layouts)) < 0) |
| return ret; |
| |
| return ff_set_common_all_samplerates(ctx); |
| } |
| |
| #define DEPTH 32 |
| #include "dialoguenhance_template.c" |
| |
| #undef DEPTH |
| #define DEPTH 64 |
| #include "dialoguenhance_template.c" |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AudioDialogueEnhanceContext *s = ctx->priv; |
| int ret; |
| |
| s->fft_size = inlink->sample_rate > 100000 ? 8192 : inlink->sample_rate > 50000 ? 4096 : 2048; |
| s->overlap = s->fft_size / 4; |
| |
| s->in_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| s->center_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| s->out_dist_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| s->windowed_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| s->windowed_out = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| s->windowed_prev = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2); |
| if (!s->in_frame || !s->windowed_out || !s->windowed_prev || |
| !s->out_dist_frame || !s->windowed_frame || !s->center_frame) |
| return AVERROR(ENOMEM); |
| |
| switch (inlink->format) { |
| case AV_SAMPLE_FMT_FLTP: |
| s->de_stereo = de_stereo_float; |
| ret = de_tx_init_float(ctx); |
| break; |
| case AV_SAMPLE_FMT_DBLP: |
| s->de_stereo = de_stereo_double; |
| ret = de_tx_init_double(ctx); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AudioDialogueEnhanceContext *s = ctx->priv; |
| AVFrame *out; |
| int ret; |
| |
| out = ff_get_audio_buffer(outlink, s->overlap); |
| if (!out) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| s->in = in; |
| s->de_stereo(ctx, out); |
| |
| av_frame_copy_props(out, in); |
| out->nb_samples = in->nb_samples; |
| ret = ff_filter_frame(outlink, out); |
| fail: |
| av_frame_free(&in); |
| s->in = NULL; |
| return ret < 0 ? ret : 0; |
| } |
| |
| static int activate(AVFilterContext *ctx) |
| { |
| AVFilterLink *inlink = ctx->inputs[0]; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AudioDialogueEnhanceContext *s = ctx->priv; |
| AVFrame *in = NULL; |
| int ret = 0, status; |
| int64_t pts; |
| |
| FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
| |
| ret = ff_inlink_consume_samples(inlink, s->overlap, s->overlap, &in); |
| if (ret < 0) |
| return ret; |
| |
| if (ret > 0) { |
| return filter_frame(inlink, in); |
| } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) { |
| ff_outlink_set_status(outlink, status, pts); |
| return 0; |
| } else { |
| if (ff_inlink_queued_samples(inlink) >= s->overlap) { |
| ff_filter_set_ready(ctx, 10); |
| } else if (ff_outlink_frame_wanted(outlink)) { |
| ff_inlink_request_frame(inlink); |
| } |
| return 0; |
| } |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| AudioDialogueEnhanceContext *s = ctx->priv; |
| |
| av_freep(&s->window); |
| |
| av_frame_free(&s->in_frame); |
| av_frame_free(&s->center_frame); |
| av_frame_free(&s->out_dist_frame); |
| av_frame_free(&s->windowed_frame); |
| av_frame_free(&s->windowed_out); |
| av_frame_free(&s->windowed_prev); |
| |
| av_tx_uninit(&s->tx_ctx[0]); |
| av_tx_uninit(&s->tx_ctx[1]); |
| av_tx_uninit(&s->itx_ctx); |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .config_props = config_input, |
| }, |
| }; |
| |
| const AVFilter ff_af_dialoguenhance = { |
| .name = "dialoguenhance", |
| .description = NULL_IF_CONFIG_SMALL("Audio Dialogue Enhancement."), |
| .priv_size = sizeof(AudioDialogueEnhanceContext), |
| .priv_class = &dialoguenhance_class, |
| .uninit = uninit, |
| FILTER_INPUTS(inputs), |
| FILTER_OUTPUTS(ff_audio_default_filterpad), |
| FILTER_QUERY_FUNC(query_formats), |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
| .activate = activate, |
| .process_command = ff_filter_process_command, |
| }; |