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avfilter: add aphasemeter filter
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Paul B Mahol
parent
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commit
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@ -30,6 +30,7 @@ version <next>:
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- allyuv video source
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- atadenoise video filter
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- OS X VideoToolbox support
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- aphasemeter filter
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version 2.7:
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@ -354,6 +354,7 @@ Filters:
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af_pan.c Nicolas George
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af_sidechaincompress.c Paul B Mahol
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af_silenceremove.c Paul B Mahol
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avf_aphasemeter.c Paul B Mahol
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avf_avectorscope.c Paul B Mahol
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avf_showcqt.c Muhammad Faiz
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vf_blend.c Paul B Mahol
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@ -11656,6 +11656,38 @@ tools.
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Below is a description of the currently available multimedia filters.
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@section aphasemeter
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Convert input audio to a video output, displaying the audio phase.
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The filter accepts the following options:
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@table @option
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@item rate, r
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Set the output frame rate. Default value is @code{25}.
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@item size, s
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Set the video size for the output. For the syntax of this option, check the
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@ref{video size syntax,,"Video size" section in the ffmpeg-utils manual,ffmpeg-utils}.
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Default value is @code{800x400}.
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@item rc
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@item gc
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@item bc
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Specify the red, green, blue contrast. Default values are @code{2},
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@code{7} and @code{1}.
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Allowed range is @code{[0, 255]}.
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@item mpc
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Set color which will be used for drawing median phase. If color is
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@code{none} which is default, no median phase value will be drawn.
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@end table
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The filter also exports the frame metadata @code{lavfi.aphasemeter.phase} which
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represents mean phase of current audio frame. Value is in range @code{[-1, 1]}.
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The @code{-1} means left and right channels are completely out of phase and
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@code{1} means channels are in phase.
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@section avectorscope
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Convert input audio to a video output, representing the audio vector
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@ -253,6 +253,7 @@ OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o
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# multimedia filters
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OBJS-$(CONFIG_ADRAWGRAPH_FILTER) += f_drawgraph.o
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OBJS-$(CONFIG_APHASEMETER_FILTER) += avf_aphasemeter.o
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OBJS-$(CONFIG_AVECTORSCOPE_FILTER) += avf_avectorscope.o
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OBJS-$(CONFIG_CONCAT_FILTER) += avf_concat.o
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OBJS-$(CONFIG_SHOWCQT_FILTER) += avf_showcqt.o
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@ -268,6 +268,7 @@ void avfilter_register_all(void)
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/* multimedia filters */
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REGISTER_FILTER(ADRAWGRAPH, adrawgraph, avf);
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REGISTER_FILTER(APHASEMETER, aphasemeter, avf);
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REGISTER_FILTER(AVECTORSCOPE, avectorscope, avf);
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REGISTER_FILTER(CONCAT, concat, avf);
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REGISTER_FILTER(SHOWCQT, showcqt, avf);
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241
libavfilter/avf_aphasemeter.c
Normal file
241
libavfilter/avf_aphasemeter.c
Normal file
@ -0,0 +1,241 @@
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/*
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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 "libavutil/avassert.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 "avfilter.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;
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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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} AudioPhaseMeterContext;
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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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static const AVOption aphasemeter_options[] = {
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, 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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{ 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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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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formats = ff_make_format_list(sample_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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ff_formats_ref(formats, &inlink->out_formats);
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ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO);
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ff_channel_layouts_ref(layout, &inlink->out_channel_layouts);
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formats = ff_all_samplerates();
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if (!formats)
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return AVERROR(ENOMEM);
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ff_formats_ref(formats, &inlink->out_samplerates);
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formats = ff_make_format_list(pix_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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ff_formats_ref(formats, &outlink->in_formats);
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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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int nb_samples;
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nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
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inlink->partial_buf_size =
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inlink->min_samples =
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inlink->max_samples = nb_samples;
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return 0;
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}
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static int config_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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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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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.) / 2. * (w - 1);
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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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AudioPhaseMeterContext *s = ctx->priv;
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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;
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if (!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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av_frame_free(&in);
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return AVERROR(ENOMEM);
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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 {
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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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s->out->pts = in->pts;
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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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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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fphase += phase;
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}
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fphase /= in->nb_samples;
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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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metadata = avpriv_frame_get_metadatap(out);
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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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av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
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}
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av_frame_free(&in);
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return ff_filter_frame(outlink, av_frame_clone(s->out));
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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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av_frame_free(&s->out);
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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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.filter_frame = filter_frame,
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},
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{ NULL }
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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_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_avf_aphasemeter = {
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.name = "aphasemeter",
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.description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
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.uninit = uninit,
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.query_formats = query_formats,
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.priv_size = sizeof(AudioPhaseMeterContext),
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.inputs = inputs,
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.outputs = outputs,
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.priv_class = &aphasemeter_class,
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};
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFILTER_VERSION_MAJOR 5
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#define LIBAVFILTER_VERSION_MINOR 32
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#define LIBAVFILTER_VERSION_MINOR 33
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#define LIBAVFILTER_VERSION_MICRO 100
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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