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FFmpeg/libavfilter/avf_showvolume.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

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/*
* 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
*/
#include "libavutil/channel_layout.h"
#include "libavutil/eval.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/xga_font_data.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"
#include "internal.h"
static const char *const var_names[] = { "VOLUME", "CHANNEL", "PEAK", NULL };
enum { VAR_VOLUME, VAR_CHANNEL, VAR_PEAK, VAR_VARS_NB };
enum DisplayScale { LINEAR, LOG, NB_DISPLAY_SCALE };
typedef struct ShowVolumeContext {
const AVClass *class;
int w, h;
int b;
double f;
AVRational frame_rate;
char *color;
int orientation;
int step;
float bgopacity;
int mode;
int nb_samples;
AVFrame *out;
AVExpr *c_expr;
int draw_text;
int draw_volume;
double *values;
uint32_t *color_lut;
float *max;
int display_scale;
double draw_persistent_duration; /* in second */
uint8_t persistant_max_rgba[4];
int persistent_max_frames; /* number of frames to check max value */
float *max_persistent; /* max value for draw_persistent_max for each channel */
int *nb_frames_max_display; /* number of frame for each channel, for displaying the max value */
void (*meter)(float *src, int nb_samples, float *max);
} ShowVolumeContext;
#define OFFSET(x) offsetof(ShowVolumeContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showvolume_options[] = {
{ "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 },
{ "b", "set border width", OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS },
{ "w", "set channel width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS },
{ "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS },
{ "f", "set fade", OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0, 1, FLAGS },
{ "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS },
{ "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "dm", "duration for max value display", OFFSET(draw_persistent_duration), AV_OPT_TYPE_DOUBLE, {.dbl=0.}, 0, 9000, FLAGS},
{ "dmc","set color of the max value line", OFFSET(persistant_max_rgba), AV_OPT_TYPE_COLOR, {.str = "orange"}, 0, 0, FLAGS },
{ "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "orientation" },
{ "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "orientation" },
{ "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "orientation" },
{ "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS },
{ "p", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS },
{ "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "mode" },
{ "p", "peak", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" },
{ "r", "rms", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" },
{ "ds", "set display scale", OFFSET(display_scale), AV_OPT_TYPE_INT, {.i64=LINEAR}, LINEAR, NB_DISPLAY_SCALE - 1, FLAGS, .unit = "display_scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "display_scale" },
{ "log", "log", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "display_scale" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(showvolume);
static av_cold int init(AVFilterContext *ctx)
{
ShowVolumeContext *s = ctx->priv;
int ret;
if (s->color) {
ret = av_expr_parse(&s->c_expr, s->color, var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
}
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
AVFilterChannelLayouts *layouts = 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_RGBA, AV_PIX_FMT_NONE };
int ret;
formats = ff_make_format_list(sample_fmts);
if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
return ret;
layouts = ff_all_channel_counts();
if ((ret = ff_channel_layouts_ref(layouts, &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 void find_peak(float *src, int nb_samples, float *peak)
{
float max = 0.f;
max = 0;
for (int i = 0; i < nb_samples; i++)
max = fmaxf(max, fabsf(src[i]));
*peak = max;
}
static void find_rms(float *src, int nb_samples, float *rms)
{
float sum = 0.f;
for (int i = 0; i < nb_samples; i++)
sum += src[i] * src[i];
*rms = sqrtf(sum / nb_samples);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ShowVolumeContext *s = ctx->priv;
s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
s->values = av_calloc(inlink->ch_layout.nb_channels * VAR_VARS_NB, sizeof(double));
if (!s->values)
return AVERROR(ENOMEM);
s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->ch_layout.nb_channels);
if (!s->color_lut)
return AVERROR(ENOMEM);
s->max = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->max));
if (!s->max)
return AVERROR(ENOMEM);
switch (s->mode) {
case 0: s->meter = find_peak; break;
case 1: s->meter = find_rms; break;
default: return AVERROR_BUG;
}
if (s->draw_persistent_duration > 0.) {
s->persistent_max_frames = (int) FFMAX(av_q2d(s->frame_rate) * s->draw_persistent_duration, 1.);
s->max_persistent = av_calloc(inlink->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->max_persistent));
s->nb_frames_max_display = av_calloc(inlink->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->nb_frames_max_display));
if (!s->max_persistent ||
!s->nb_frames_max_display)
return AVERROR(ENOMEM);
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
ShowVolumeContext *s = outlink->src->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
int ch;
if (s->orientation) {
outlink->h = s->w;
outlink->w = s->h * inlink->ch_layout.nb_channels + (inlink->ch_layout.nb_channels - 1) * s->b;
} else {
outlink->w = s->w;
outlink->h = s->h * inlink->ch_layout.nb_channels + (inlink->ch_layout.nb_channels - 1) * s->b;
}
outlink->sample_aspect_ratio = (AVRational){1,1};
outlink->frame_rate = s->frame_rate;
outlink->time_base = av_inv_q(outlink->frame_rate);
for (ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {
int i;
for (i = 0; i < s->w; i++) {
float max = i / (float)(s->w - 1);
s->values[ch * VAR_VARS_NB + VAR_PEAK] = max;
s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch;
s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL);
}
}
return 0;
}
static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
{
const uint8_t *font;
int font_height;
int i;
font = avpriv_cga_font, font_height = 8;
for (i = 0; txt[i]; i++) {
int char_y, mask;
if (o) { /* vertical orientation */
for (char_y = font_height - 1; char_y >= 0; char_y--) {
uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4;
for (mask = 0x80; mask; mask >>= 1) {
if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4]));
p += pic->linesize[0];
}
}
} else { /* horizontal orientation */
uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
for (char_y = 0; char_y < font_height; char_y++) {
for (mask = 0x80; mask; mask >>= 1) {
if (font[txt[i] * font_height + char_y] & mask)
AV_WN32(p, ~AV_RN32(p));
p += 4;
}
p += pic->linesize[0] - 8 * 4;
}
}
}
}
static void clear_picture(ShowVolumeContext *s, AVFilterLink *outlink)
{
int i, j;
const uint32_t bg = (uint32_t)(s->bgopacity * 255) << 24;
for (i = 0; i < outlink->h; i++) {
uint32_t *dst = (uint32_t *)(s->out->data[0] + i * s->out->linesize[0]);
for (j = 0; j < outlink->w; j++)
AV_WN32A(dst + j, bg);
}
}
static inline int calc_max_draw(ShowVolumeContext *s, AVFilterLink *outlink, float max)
{
float max_val;
if (s->display_scale == LINEAR) {
max_val = max;
} else { /* log */
max_val = av_clipf(0.21 * log10(max) + 1, 0, 1);
}
if (s->orientation) { /* vertical */
return outlink->h - outlink->h * max_val;
} else { /* horizontal */
return s->w * max_val;
}
}
static inline void calc_persistent_max(ShowVolumeContext *s, float max, int channel)
{
/* update max value for persistent max display */
if ((max >= s->max_persistent[channel]) || (s->nb_frames_max_display[channel] >= s->persistent_max_frames)) { /* update max value for display */
s->max_persistent[channel] = max;
s->nb_frames_max_display[channel] = 0;
} else {
s->nb_frames_max_display[channel] += 1; /* incremente display frame count */
}
}
static inline void draw_max_line(ShowVolumeContext *s, int max_draw, int channel)
{
int k;
if (s->orientation) { /* vertical */
uint8_t *dst = s->out->data[0] + max_draw * s->out->linesize[0] + channel * (s->b + s->h) * 4;
for (k = 0; k < s->h; k++) {
memcpy(dst + k * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
}
} else { /* horizontal */
for (k = 0; k < s->h; k++) {
uint8_t *dst = s->out->data[0] + (channel * s->h + channel * s->b + k) * s->out->linesize[0];
memcpy(dst + max_draw * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
}
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ShowVolumeContext *s = ctx->priv;
const int step = s->step;
int c, j, k, max_draw, ret;
char channel_name[64];
AVFrame *out;
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(&insamples);
return AVERROR(ENOMEM);
}
clear_picture(s, outlink);
}
s->out->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
s->out->duration = 1;
if ((s->f < 1.) && (s->f > 0.)) {
for (j = 0; j < outlink->h; j++) {
uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
const uint32_t alpha = s->bgopacity * 255;
for (k = 0; k < outlink->w; k++) {
dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0);
dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0);
dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0);
dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, alpha);
}
}
} else if (s->f == 0.) {
clear_picture(s, outlink);
}
if (s->orientation) { /* vertical */
for (c = 0; c < inlink->ch_layout.nb_channels; c++) {
float *src = (float *)insamples->extended_data[c];
uint32_t *lut = s->color_lut + s->w * c;
float max;
s->meter(src, insamples->nb_samples, &s->max[c]);
max = s->max[c];
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
max = av_clipf(max, 0, 1);
max_draw = calc_max_draw(s, outlink, max);
for (j = s->w - 1; j >= max_draw; j--) {
uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4;
for (k = 0; k < s->h; k++) {
AV_WN32A(&dst[k * 4], lut[s->w - j - 1]);
}
if (j & step)
j -= step;
}
if (s->draw_persistent_duration > 0.) {
calc_persistent_max(s, max, c);
max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
draw_max_line(s, max_draw, c);
}
}
} else { /* horizontal */
for (c = 0; c < inlink->ch_layout.nb_channels; c++) {
float *src = (float *)insamples->extended_data[c];
uint32_t *lut = s->color_lut + s->w * c;
float max;
s->meter(src, insamples->nb_samples, &s->max[c]);
max = s->max[c];
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
max = av_clipf(max, 0, 1);
max_draw = calc_max_draw(s, outlink, max);
for (j = 0; j < s->h; j++) {
uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];
for (k = 0; k < max_draw; k++) {
AV_WN32A(dst + k * 4, lut[k]);
if (k & step)
k += step;
}
}
if (s->draw_persistent_duration > 0.) {
calc_persistent_max(s, max, c);
max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
draw_max_line(s, max_draw, c);
}
}
}
av_frame_free(&insamples);
out = av_frame_clone(s->out);
if (!out)
return AVERROR(ENOMEM);
ret = ff_inlink_make_frame_writable(outlink, &out);
if (ret < 0) {
av_frame_free(&out);
return ret;
}
/* draw channel names */
for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 10 && s->draw_text; c++) {
if (s->orientation) { /* vertical */
int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c));
if (ret < 0)
continue;
drawtext(out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1);
} else { /* horizontal */
int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c));
if (ret < 0)
continue;
drawtext(out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0);
}
}
/* draw volume level */
for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 8 && s->draw_volume; c++) {
char buf[16];
if (s->orientation) { /* vertical */
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1);
} else { /* horizontal */
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0);
}
}
return ff_filter_frame(outlink, out);
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
ShowVolumeContext *s = ctx->priv;
AVFrame *in = NULL;
int ret;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
if (ret < 0)
return ret;
if (ret > 0)
return filter_frame(inlink, in);
if (ff_inlink_queued_samples(inlink) >= s->nb_samples) {
ff_filter_set_ready(ctx, 10);
return 0;
}
FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ShowVolumeContext *s = ctx->priv;
av_frame_free(&s->out);
av_expr_free(s->c_expr);
av_freep(&s->values);
av_freep(&s->color_lut);
av_freep(&s->max);
av_freep(&s->max_persistent);
av_freep(&s->nb_frames_max_display);
}
static const AVFilterPad showvolume_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
},
};
static const AVFilterPad showvolume_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_avf_showvolume = {
.name = "showvolume",
.description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
.init = init,
.activate = activate,
.uninit = uninit,
.priv_size = sizeof(ShowVolumeContext),
FILTER_INPUTS(showvolume_inputs),
FILTER_OUTPUTS(showvolume_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &showvolume_class,
};
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