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FFmpeg/libavfilter/avf_showspatial.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

338 lines
11 KiB
C

/*
* Copyright (c) 2019 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 <math.h>
#include "libavutil/mem.h"
#include "libavutil/tx.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "formats.h"
#include "video.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#include "window_func.h"
typedef struct ShowSpatialContext {
const AVClass *class;
int w, h;
AVRational frame_rate;
AVTXContext *fft[2]; ///< Fast Fourier Transform context
AVComplexFloat *fft_data[2]; ///< bins holder for each (displayed) channels
AVComplexFloat *fft_tdata[2]; ///< bins holder for each (displayed) channels
float *window_func_lut; ///< Window function LUT
av_tx_fn tx_fn[2];
int win_func;
int win_size;
int buf_size;
int consumed;
int hop_size;
AVAudioFifo *fifo;
int64_t pts;
} ShowSpatialContext;
#define OFFSET(x) offsetof(ShowSpatialContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showspatial_options[] = {
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "512x512"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "512x512"}, 0, 0, FLAGS },
{ "win_size", "set window size", OFFSET(win_size), AV_OPT_TYPE_INT, {.i64 = 4096}, 1024, 65536, FLAGS },
WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(showspatial);
static av_cold void uninit(AVFilterContext *ctx)
{
ShowSpatialContext *s = ctx->priv;
for (int i = 0; i < 2; i++)
av_tx_uninit(&s->fft[i]);
for (int i = 0; i < 2; i++) {
av_freep(&s->fft_data[i]);
av_freep(&s->fft_tdata[i]);
}
av_freep(&s->window_func_lut);
av_audio_fifo_free(s->fifo);
}
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_FLTP, AV_SAMPLE_FMT_NONE };
static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GBRP, AV_PIX_FMT_NONE };
int ret;
formats = ff_make_format_list(sample_fmts);
if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 ||
(ret = ff_add_channel_layout (&layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
(ret = ff_channel_layouts_ref (layout , &inlink->outcfg.channel_layouts)) < 0)
return ret;
formats = ff_all_samplerates();
if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
return ret;
formats = ff_make_format_list(pix_fmts);
if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
return ret;
return 0;
}
static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ShowSpatialContext *s = ctx->priv;
const float *window_func_lut = s->window_func_lut;
AVFrame *fin = arg;
const int ch = jobnr;
const float *p = (float *)fin->extended_data[ch];
for (int n = 0; n < fin->nb_samples; n++) {
s->fft_tdata[ch][n].re = p[n] * window_func_lut[n];
s->fft_tdata[ch][n].im = 0.f;
}
s->tx_fn[ch](s->fft[ch], s->fft_data[ch], s->fft_tdata[ch], sizeof(AVComplexFloat));
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowSpatialContext *s = ctx->priv;
float overlap;
int ret;
outlink->w = s->w;
outlink->h = s->h;
outlink->sample_aspect_ratio = (AVRational){1,1};
outlink->frame_rate = s->frame_rate;
outlink->time_base = av_inv_q(outlink->frame_rate);
/* (re-)configuration if the video output changed (or first init) */
if (s->win_size != s->buf_size) {
s->buf_size = s->win_size;
/* FFT buffers: x2 for each channel buffer.
* Note: we use free and malloc instead of a realloc-like function to
* make sure the buffer is aligned in memory for the FFT functions. */
for (int i = 0; i < 2; i++) {
av_tx_uninit(&s->fft[i]);
av_freep(&s->fft_data[i]);
av_freep(&s->fft_tdata[i]);
}
for (int i = 0; i < 2; i++) {
float scale = 1.f;
ret = av_tx_init(&s->fft[i], &s->tx_fn[i], AV_TX_FLOAT_FFT,
0, s->win_size, &scale, 0);
if (ret < 0)
return ret;
}
for (int i = 0; i < 2; i++) {
s->fft_tdata[i] = av_calloc(s->buf_size, sizeof(**s->fft_tdata));
if (!s->fft_tdata[i])
return AVERROR(ENOMEM);
s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data));
if (!s->fft_data[i])
return AVERROR(ENOMEM);
}
/* pre-calc windowing function */
s->window_func_lut =
av_realloc_f(s->window_func_lut, s->win_size,
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
s->hop_size = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
}
av_audio_fifo_free(s->fifo);
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->ch_layout.nb_channels, s->win_size);
if (!s->fifo)
return AVERROR(ENOMEM);
return 0;
}
#define RE(y, ch) s->fft_data[ch][y].re
#define IM(y, ch) s->fft_data[ch][y].im
static void draw_dot(uint8_t *dst, int linesize, int value)
{
dst[0] = value;
dst[1] = value;
dst[-1] = value;
dst[linesize] = value;
dst[-linesize] = value;
}
static int draw_spatial(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ShowSpatialContext *s = ctx->priv;
AVFrame *outpicref;
int h = s->h - 2;
int w = s->w - 2;
int z = s->win_size / 2;
int64_t pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!outpicref)
return AVERROR(ENOMEM);
outpicref->sample_aspect_ratio = (AVRational){1,1};
for (int i = 0; i < outlink->h; i++) {
memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
memset(outpicref->data[1] + i * outpicref->linesize[1], 0, outlink->w);
memset(outpicref->data[2] + i * outpicref->linesize[2], 0, outlink->w);
}
for (int j = 0; j < z; j++) {
const int idx = z - 1 - j;
float l = hypotf(RE(idx, 0), IM(idx, 0));
float r = hypotf(RE(idx, 1), IM(idx, 1));
float sum = l + r;
float lp = atan2f(IM(idx, 0), RE(idx, 0));
float rp = atan2f(IM(idx, 1), RE(idx, 1));
float diffp = ((rp - lp) / (2.f * M_PI) + 1.f) * 0.5f;
float diff = (sum < 0.000001f ? 0.f : (r - l) / sum) * 0.5f + 0.5f;
float cr = av_clipf(cbrtf(l / sum), 0, 1) * 255.f;
float cb = av_clipf(cbrtf(r / sum), 0, 1) * 255.f;
float cg;
int x, y;
cg = diffp * 255.f;
x = av_clip(w * diff, 0, w - 2) + 1;
y = av_clip(h * diffp, 0, h - 2) + 1;
draw_dot(outpicref->data[0] + outpicref->linesize[0] * y + x, outpicref->linesize[0], cg);
draw_dot(outpicref->data[1] + outpicref->linesize[1] * y + x, outpicref->linesize[1], cb);
draw_dot(outpicref->data[2] + outpicref->linesize[2] * y + x, outpicref->linesize[2], cr);
}
outpicref->pts = pts;
outpicref->duration = 1;
return ff_filter_frame(outlink, outpicref);
}
static int spatial_activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
ShowSpatialContext *s = ctx->priv;
int ret;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (av_audio_fifo_size(s->fifo) < s->win_size) {
AVFrame *frame = NULL;
ret = ff_inlink_consume_frame(inlink, &frame);
if (ret < 0)
return ret;
if (ret > 0) {
s->pts = frame->pts;
s->consumed = 0;
av_audio_fifo_write(s->fifo, (void **)frame->extended_data, frame->nb_samples);
av_frame_free(&frame);
}
}
if (av_audio_fifo_size(s->fifo) >= s->win_size) {
AVFrame *fin = ff_get_audio_buffer(inlink, s->win_size);
if (!fin)
return AVERROR(ENOMEM);
fin->pts = s->pts + s->consumed;
s->consumed += s->hop_size;
ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data,
FFMIN(s->win_size, av_audio_fifo_size(s->fifo)));
if (ret < 0) {
av_frame_free(&fin);
return ret;
}
av_assert0(fin->nb_samples == s->win_size);
ff_filter_execute(ctx, run_channel_fft, fin, NULL, 2);
ret = draw_spatial(inlink, fin);
av_frame_free(&fin);
av_audio_fifo_drain(s->fifo, s->hop_size);
if (ret <= 0)
return ret;
}
FF_FILTER_FORWARD_STATUS(inlink, outlink);
if (ff_outlink_frame_wanted(outlink) && av_audio_fifo_size(s->fifo) < s->win_size) {
ff_inlink_request_frame(inlink);
return 0;
}
if (av_audio_fifo_size(s->fifo) >= s->win_size) {
ff_filter_set_ready(ctx, 10);
return 0;
}
return FFERROR_NOT_READY;
}
static const AVFilterPad showspatial_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_avf_showspatial = {
.name = "showspatial",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spatial video output."),
.uninit = uninit,
.priv_size = sizeof(ShowSpatialContext),
FILTER_INPUTS(ff_audio_default_filterpad),
FILTER_OUTPUTS(showspatial_outputs),
FILTER_QUERY_FUNC(query_formats),
.activate = spatial_activate,
.priv_class = &showspatial_class,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};