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avfilter: add aphasemeter filter

tags/n2.8
Paul B Mahol 9 years ago
parent
45c558563a
commit
f9905e13ea
7 changed files with 278 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +1
    -0
      MAINTAINERS
  3. +32
    -0
      doc/filters.texi
  4. +1
    -0
      libavfilter/Makefile
  5. +1
    -0
      libavfilter/allfilters.c
  6. +241
    -0
      libavfilter/avf_aphasemeter.c
  7. +1
    -1
      libavfilter/version.h

+ 1
- 0
Changelog View File

@@ -30,6 +30,7 @@ version <next>:
- allyuv video source
- atadenoise video filter
- OS X VideoToolbox support
- aphasemeter filter


version 2.7:


+ 1
- 0
MAINTAINERS View File

@@ -354,6 +354,7 @@ Filters:
af_pan.c Nicolas George
af_sidechaincompress.c Paul B Mahol
af_silenceremove.c Paul B Mahol
avf_aphasemeter.c Paul B Mahol
avf_avectorscope.c Paul B Mahol
avf_showcqt.c Muhammad Faiz
vf_blend.c Paul B Mahol


+ 32
- 0
doc/filters.texi View File

@@ -11656,6 +11656,38 @@ tools.

Below is a description of the currently available multimedia filters.

@section aphasemeter

Convert input audio to a video output, displaying the audio phase.

The filter accepts the following options:

@table @option
@item rate, r
Set the output frame rate. Default value is @code{25}.

@item size, s
Set the video size for the output. For the syntax of this option, check the
@ref{video size syntax,,"Video size" section in the ffmpeg-utils manual,ffmpeg-utils}.
Default value is @code{800x400}.

@item rc
@item gc
@item bc
Specify the red, green, blue contrast. Default values are @code{2},
@code{7} and @code{1}.
Allowed range is @code{[0, 255]}.

@item mpc
Set color which will be used for drawing median phase. If color is
@code{none} which is default, no median phase value will be drawn.
@end table

The filter also exports the frame metadata @code{lavfi.aphasemeter.phase} which
represents mean phase of current audio frame. Value is in range @code{[-1, 1]}.
The @code{-1} means left and right channels are completely out of phase and
@code{1} means channels are in phase.

@section avectorscope

Convert input audio to a video output, representing the audio vector


+ 1
- 0
libavfilter/Makefile View File

@@ -253,6 +253,7 @@ OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o

# multimedia filters
OBJS-$(CONFIG_ADRAWGRAPH_FILTER) += f_drawgraph.o
OBJS-$(CONFIG_APHASEMETER_FILTER) += avf_aphasemeter.o
OBJS-$(CONFIG_AVECTORSCOPE_FILTER) += avf_avectorscope.o
OBJS-$(CONFIG_CONCAT_FILTER) += avf_concat.o
OBJS-$(CONFIG_SHOWCQT_FILTER) += avf_showcqt.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -268,6 +268,7 @@ void avfilter_register_all(void)

/* multimedia filters */
REGISTER_FILTER(ADRAWGRAPH, adrawgraph, avf);
REGISTER_FILTER(APHASEMETER, aphasemeter, avf);
REGISTER_FILTER(AVECTORSCOPE, avectorscope, avf);
REGISTER_FILTER(CONCAT, concat, avf);
REGISTER_FILTER(SHOWCQT, showcqt, avf);


+ 241
- 0
libavfilter/avf_aphasemeter.c View File

@@ -0,0 +1,241 @@
/*
* Copyright (c) 2015 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
*/

/**
* @file
* audio to video multimedia aphasemeter filter
*/

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"

typedef struct AudioPhaseMeterContext {
const AVClass *class;
AVFrame *out;
int w, h;
AVRational frame_rate;
int contrast[4];
uint8_t *mpc_str;
uint8_t mpc[4];
int draw_median_phase;
} AudioPhaseMeterContext;

#define OFFSET(x) offsetof(AudioPhaseMeterContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static const AVOption aphasemeter_options[] = {
{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
{ "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
{ "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
{ "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
{ "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
{ NULL }
};

AVFILTER_DEFINE_CLASS(aphasemeter);

static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
AVFilterChannelLayouts *layout = NULL;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };

formats = ff_make_format_list(sample_fmts);
if (!formats)
return AVERROR(ENOMEM);
ff_formats_ref(formats, &inlink->out_formats);

ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO);
ff_channel_layouts_ref(layout, &inlink->out_channel_layouts);

formats = ff_all_samplerates();
if (!formats)
return AVERROR(ENOMEM);
ff_formats_ref(formats, &inlink->out_samplerates);

formats = ff_make_format_list(pix_fmts);
if (!formats)
return AVERROR(ENOMEM);
ff_formats_ref(formats, &outlink->in_formats);

return 0;
}

static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AudioPhaseMeterContext *s = ctx->priv;
int nb_samples;

nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
inlink->partial_buf_size =
inlink->min_samples =
inlink->max_samples = nb_samples;

return 0;
}

static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AudioPhaseMeterContext *s = ctx->priv;

outlink->w = s->w;
outlink->h = s->h;
outlink->sample_aspect_ratio = (AVRational){1,1};
outlink->frame_rate = s->frame_rate;

if (!strcmp(s->mpc_str, "none"))
s->draw_median_phase = 0;
else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0)
s->draw_median_phase = 1;
else
return AVERROR(EINVAL);

return 0;
}

static inline int get_x(float phase, int w)
{
return (phase + 1.) / 2. * (w - 1);
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AudioPhaseMeterContext *s = ctx->priv;
AVDictionary **metadata;
const int rc = s->contrast[0];
const int gc = s->contrast[1];
const int bc = s->contrast[2];
float fphase = 0;
AVFrame *out;
uint8_t *dst;
int i;

if (!s->out || s->out->width != outlink->w ||
s->out->height != outlink->h) {
av_frame_free(&s->out);
s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!s->out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}

out = s->out;
for (i = 0; i < outlink->h; i++)
memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
} else {
out = s->out;
for (i = outlink->h - 1; i >= 10; i--)
memmove(out->data[0] + (i ) * out->linesize[0],
out->data[0] + (i-1) * out->linesize[0],
outlink->w * 4);
for (i = 0; i < outlink->w; i++)
AV_WL32(out->data[0] + i * 4, 0);
}
s->out->pts = in->pts;

for (i = 0; i < in->nb_samples; i++) {
const float *src = (float *)in->data[0] + i * 2;
const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2;
const float phase = isnan(f) ? 1 : f;
const int x = get_x(phase, s->w);

dst = out->data[0] + x * 4;
dst[0] = FFMIN(255, dst[0] + rc);
dst[1] = FFMIN(255, dst[1] + gc);
dst[2] = FFMIN(255, dst[2] + bc);
dst[3] = 255;
fphase += phase;
}
fphase /= in->nb_samples;

if (s->draw_median_phase) {
dst = out->data[0] + get_x(fphase, s->w) * 4;
AV_WL32(dst, AV_RL32(s->mpc));
}

for (i = 1; i < 10 && i < outlink->h; i++)
memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);

metadata = avpriv_frame_get_metadatap(out);
if (metadata) {
uint8_t value[128];

snprintf(value, sizeof(value), "%f", fphase);
av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
}

av_frame_free(&in);
return ff_filter_frame(outlink, av_frame_clone(s->out));
}

static av_cold void uninit(AVFilterContext *ctx)
{
AudioPhaseMeterContext *s = ctx->priv;

av_frame_free(&s->out);
}

static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};

static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};

AVFilter ff_avf_aphasemeter = {
.name = "aphasemeter",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(AudioPhaseMeterContext),
.inputs = inputs,
.outputs = outputs,
.priv_class = &aphasemeter_class,
};

+ 1
- 1
libavfilter/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/version.h"

#define LIBAVFILTER_VERSION_MAJOR 5
#define LIBAVFILTER_VERSION_MINOR 32
#define LIBAVFILTER_VERSION_MINOR 33
#define LIBAVFILTER_VERSION_MICRO 100

#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \


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