447 lines
16 KiB
C
447 lines
16 KiB
C
/*
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* Copyright (c) 2015 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
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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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/**
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* @file
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* audio to video multimedia aphasemeter filter
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*/
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#include <float.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/timestamp.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 "audio.h"
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#include "video.h"
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#include "internal.h"
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typedef struct AudioPhaseMeterContext {
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const AVClass *class;
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AVFrame *out, *in;
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int64_t last_pts;
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int do_video;
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int do_phasing_detection;
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int w, h;
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AVRational frame_rate;
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int contrast[4];
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uint8_t *mpc_str;
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uint8_t mpc[4];
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int draw_median_phase;
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int is_mono;
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int is_out_phase;
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int start_mono_presence;
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int start_out_phase_presence;
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int nb_samples;
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float tolerance;
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float angle;
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float phase;
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AVRational time_base;
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int64_t duration;
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int64_t frame_end;
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int64_t mono_idx[2];
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int64_t out_phase_idx[2];
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} AudioPhaseMeterContext;
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#define MAX_DURATION (24*60*60*1000000LL)
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#define OFFSET(x) offsetof(AudioPhaseMeterContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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#define get_duration(index) (index[1] - index[0])
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static const AVOption aphasemeter_options[] = {
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
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{ "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
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{ "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
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{ "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
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{ "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
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{ "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
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{ "phasing", "set mono and out-of-phase detection output", OFFSET(do_phasing_detection), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
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{ "tolerance", "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS },
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{ "t", "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS },
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{ "angle", "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS },
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{ "a", "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS },
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{ "duration", "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS },
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{ "d", "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(aphasemeter);
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static int query_formats(AVFilterContext *ctx)
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{
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AudioPhaseMeterContext *s = ctx->priv;
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layout = NULL;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
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int ret;
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 ||
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(ret = ff_formats_ref (formats, &outlink->incfg.formats )) < 0 ||
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(ret = ff_add_channel_layout (&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO )) < 0 ||
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(ret = ff_channel_layouts_ref (layout , &inlink->outcfg.channel_layouts)) < 0 ||
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(ret = ff_channel_layouts_ref (layout , &outlink->incfg.channel_layouts)) < 0)
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return ret;
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formats = ff_all_samplerates();
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if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0 ||
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(ret = ff_formats_ref(formats, &outlink->incfg.samplerates)) < 0)
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return ret;
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if (s->do_video) {
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AVFilterLink *outlink = ctx->outputs[1];
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formats = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
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return ret;
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}
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return 0;
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}
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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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AudioPhaseMeterContext *s = ctx->priv;
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s->duration = av_rescale(s->duration, inlink->sample_rate, AV_TIME_BASE);
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if (s->do_video)
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s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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return 0;
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}
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static int config_video_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AudioPhaseMeterContext *s = ctx->priv;
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s->last_pts = AV_NOPTS_VALUE;
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outlink->w = s->w;
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outlink->h = s->h;
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outlink->sample_aspect_ratio = (AVRational){1,1};
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outlink->frame_rate = s->frame_rate;
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outlink->time_base = av_inv_q(outlink->frame_rate);
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if (!strcmp(s->mpc_str, "none"))
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s->draw_median_phase = 0;
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else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0)
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s->draw_median_phase = 1;
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else
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return AVERROR(EINVAL);
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return 0;
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}
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static inline int get_x(float phase, int w)
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{
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return (phase + 1.f) / 2.f * (w - 1.f);
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}
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static inline void add_metadata(AVFrame *insamples, const char *key, char *value)
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{
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char buf[128];
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snprintf(buf, sizeof(buf), "lavfi.aphasemeter.%s", key);
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av_dict_set(&insamples->metadata, buf, value, 0);
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}
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static inline void update_mono_detection(AudioPhaseMeterContext *s, AVFrame *insamples, int mono_measurement)
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{
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int64_t mono_duration;
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if (!s->is_mono && mono_measurement) {
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s->is_mono = 1;
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s->start_mono_presence = 1;
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s->mono_idx[0] = insamples->pts;
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}
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if (s->is_mono && mono_measurement && s->start_mono_presence) {
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s->mono_idx[1] = s->frame_end;
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mono_duration = get_duration(s->mono_idx);
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if (mono_duration >= s->duration) {
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add_metadata(insamples, "mono_start", av_ts2timestr(s->mono_idx[0], &s->time_base));
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av_log(s, AV_LOG_INFO, "mono_start: %s\n", av_ts2timestr(s->mono_idx[0], &s->time_base));
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s->start_mono_presence = 0;
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}
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}
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if (s->is_mono && !mono_measurement) {
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s->mono_idx[1] = insamples ? insamples->pts : s->frame_end;
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mono_duration = get_duration(s->mono_idx);
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if (mono_duration >= s->duration) {
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if (insamples) {
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add_metadata(insamples, "mono_end", av_ts2timestr(s->mono_idx[1], &s->time_base));
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add_metadata(insamples, "mono_duration", av_ts2timestr(mono_duration, &s->time_base));
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}
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av_log(s, AV_LOG_INFO, "mono_end: %s | mono_duration: %s\n", av_ts2timestr(s->mono_idx[1], &s->time_base), av_ts2timestr(mono_duration, &s->time_base));
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}
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s->is_mono = 0;
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}
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}
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static inline void update_out_phase_detection(AudioPhaseMeterContext *s, AVFrame *insamples, int out_phase_measurement)
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{
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int64_t out_phase_duration;
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if (!s->is_out_phase && out_phase_measurement) {
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s->is_out_phase = 1;
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s->start_out_phase_presence = 1;
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s->out_phase_idx[0] = insamples->pts;
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}
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if (s->is_out_phase && out_phase_measurement && s->start_out_phase_presence) {
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s->out_phase_idx[1] = s->frame_end;
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out_phase_duration = get_duration(s->out_phase_idx);
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if (out_phase_duration >= s->duration) {
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add_metadata(insamples, "out_phase_start", av_ts2timestr(s->out_phase_idx[0], &s->time_base));
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av_log(s, AV_LOG_INFO, "out_phase_start: %s\n", av_ts2timestr(s->out_phase_idx[0], &s->time_base));
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s->start_out_phase_presence = 0;
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}
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}
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if (s->is_out_phase && !out_phase_measurement) {
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s->out_phase_idx[1] = insamples ? insamples->pts : s->frame_end;
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out_phase_duration = get_duration(s->out_phase_idx);
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if (out_phase_duration >= s->duration) {
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if (insamples) {
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add_metadata(insamples, "out_phase_end", av_ts2timestr(s->out_phase_idx[1], &s->time_base));
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add_metadata(insamples, "out_phase_duration", av_ts2timestr(out_phase_duration, &s->time_base));
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}
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av_log(s, AV_LOG_INFO, "out_phase_end: %s | out_phase_duration: %s\n", av_ts2timestr(s->out_phase_idx[1], &s->time_base), av_ts2timestr(out_phase_duration, &s->time_base));
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}
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s->is_out_phase = 0;
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}
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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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AudioPhaseMeterContext *s = ctx->priv;
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AVFilterLink *outlink = s->do_video ? ctx->outputs[1] : NULL;
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AVFilterLink *aoutlink = ctx->outputs[0];
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AVDictionary **metadata;
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const int rc = s->contrast[0];
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const int gc = s->contrast[1];
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const int bc = s->contrast[2];
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float fphase = 0;
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AVFrame *out;
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uint8_t *dst;
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int i, ret;
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int mono_measurement;
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int out_phase_measurement;
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float tolerance = 1.0f - s->tolerance;
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float angle = cosf(s->angle/180.0f*M_PIf);
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int64_t new_pts;
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if (s->do_video && (!s->out || s->out->width != outlink->w ||
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s->out->height != outlink->h)) {
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av_frame_free(&s->out);
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s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!s->out) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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out = s->out;
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for (i = 0; i < outlink->h; i++)
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memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
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} else if (s->do_video) {
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ret = ff_inlink_make_frame_writable(outlink, &s->out);
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if (ret < 0)
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goto fail;
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out = s->out;
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for (i = outlink->h - 1; i >= 10; i--)
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memmove(out->data[0] + (i ) * out->linesize[0],
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out->data[0] + (i-1) * out->linesize[0],
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outlink->w * 4);
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for (i = 0; i < outlink->w; i++)
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AV_WL32(out->data[0] + i * 4, 0);
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}
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for (i = 0; i < in->nb_samples; i++) {
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const float *src = (float *)in->data[0] + i * 2;
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const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2;
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const float phase = isnan(f) ? 1 : f;
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const int x = get_x(phase, s->w);
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if (s->do_video) {
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dst = out->data[0] + x * 4;
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dst[0] = FFMIN(255, dst[0] + rc);
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dst[1] = FFMIN(255, dst[1] + gc);
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dst[2] = FFMIN(255, dst[2] + bc);
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dst[3] = 255;
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}
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fphase += phase;
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}
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fphase /= in->nb_samples;
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s->phase = fphase;
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if (s->do_video) {
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if (s->draw_median_phase) {
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dst = out->data[0] + get_x(fphase, s->w) * 4;
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AV_WL32(dst, AV_RL32(s->mpc));
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}
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for (i = 1; i < 10 && i < outlink->h; i++)
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memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
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}
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metadata = &in->metadata;
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if (metadata) {
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uint8_t value[128];
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snprintf(value, sizeof(value), "%f", fphase);
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add_metadata(in, "phase", value);
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}
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if (s->do_phasing_detection) {
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s->time_base = inlink->time_base;
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s->frame_end = in->pts + av_rescale_q(in->nb_samples,
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(AVRational){ 1, in->sample_rate }, inlink->time_base);
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mono_measurement = (tolerance - fphase) < FLT_EPSILON;
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out_phase_measurement = (angle - fphase) > FLT_EPSILON;
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update_mono_detection(s, in, mono_measurement);
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update_out_phase_detection(s, in, out_phase_measurement);
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}
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if (s->do_video)
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new_pts = av_rescale_q(in->pts, inlink->time_base, outlink->time_base);
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if (s->do_video && new_pts != s->last_pts) {
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AVFrame *clone;
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s->out->pts = s->last_pts = new_pts;
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s->out->duration = 1;
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clone = av_frame_clone(s->out);
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if (!clone) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = ff_filter_frame(outlink, clone);
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if (ret < 0)
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goto fail;
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}
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s->in = NULL;
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return ff_filter_frame(aoutlink, in);
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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;
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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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AudioPhaseMeterContext *s = ctx->priv;
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int ret;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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if (s->do_video)
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FF_FILTER_FORWARD_STATUS_BACK(ctx->outputs[1], inlink);
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if (!s->in) {
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if (s->nb_samples > 0)
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ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &s->in);
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else
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ret = ff_inlink_consume_frame(inlink, &s->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, s->in);
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}
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FF_FILTER_FORWARD_STATUS_ALL(inlink, ctx);
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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if (s->do_video)
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FF_FILTER_FORWARD_WANTED(ctx->outputs[1], inlink);
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return FFERROR_NOT_READY;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AudioPhaseMeterContext *s = ctx->priv;
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if (s->do_phasing_detection) {
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update_mono_detection(s, NULL, 0);
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update_out_phase_detection(s, NULL, 0);
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}
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av_frame_free(&s->out);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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AudioPhaseMeterContext *s = ctx->priv;
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AVFilterPad pad;
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int ret;
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pad = (AVFilterPad){
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.name = "out0",
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.type = AVMEDIA_TYPE_AUDIO,
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};
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ret = ff_append_outpad(ctx, &pad);
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if (ret < 0)
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return ret;
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if (s->do_video) {
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pad = (AVFilterPad){
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.name = "out1",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_video_output,
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};
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ret = ff_append_outpad(ctx, &pad);
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if (ret < 0)
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return ret;
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}
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return 0;
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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,
|
|
.config_props = config_input,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_avf_aphasemeter = {
|
|
.name = "aphasemeter",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(AudioPhaseMeterContext),
|
|
FILTER_INPUTS(inputs),
|
|
.activate = activate,
|
|
.outputs = NULL,
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
.priv_class = &aphasemeter_class,
|
|
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
|
|
};
|