/*
* 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 "float.h"
#include "libavutil/eval.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct DrawGraphContext {
const AVClass *class;
char *key[4];
float min, max;
char *fg_str[4];
AVExpr *fg_expr[4];
uint8_t bg[4];
int mode;
int slide;
int w, h;
AVFrame *out;
int x;
int prev_y[4];
int first;
} DrawGraphContext;
#define OFFSET(x) offsetof(DrawGraphContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption drawgraph_options[] = {
{ "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
{ "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
{ "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "mode" },
{"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode"},
{"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode"},
{"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode"},
{ "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, "slide" },
{"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
{"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
{"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
{"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "slide"},
{ "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
{ "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
{ NULL }
};
static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
enum { VAR_MAX, VAR_MIN, VAR_VAL, VAR_VARS_NB };
static av_cold int init(AVFilterContext *ctx)
{
DrawGraphContext *s = ctx->priv;
int ret, i;
if (s->max <= s->min) {
av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
return AVERROR(EINVAL);
}
for (i = 0; i < 4; i++) {
if (s->fg_str[i]) {
ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0)
return ret;
}
}
s->first = 1;
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterLink *outlink = ctx->outputs[0];
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_RGBA,
AV_PIX_FMT_NONE
};
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
ff_formats_ref(fmts_list, &outlink->in_formats);
return 0;
}
static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
{
int i, j;
int bg = AV_RN32(s->bg);
for (i = 0; i < out->height; i++)
for (j = 0; j < out->width; j++)
AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
}
static inline void draw_dot(int fg, int x, int y, AVFrame *out)
{
AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
DrawGraphContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVDictionary *metadata;
AVDictionaryEntry *e;
AVFrame *out = s->out;
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);
out = s->out;
if (!s->out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
clear_image(s, out, outlink);
}
av_frame_copy_props(out, in);
metadata = av_frame_get_metadata(in);
for (i = 0; i < 4; i++) {
double values[VAR_VARS_NB];
int j, y, x, old;
uint32_t fg, bg;
float vf;
e = av_dict_get(metadata, s->key[i], NULL, 0);
if (!e || !e->value)
continue;
if (sscanf(e
->value
, "%f", &vf
) != 1) continue;
vf = av_clipf(vf, s->min, s->max);
values[VAR_MIN] = s->min;
values[VAR_MAX] = s->max;
values[VAR_VAL] = vf;
fg = av_expr_eval(s->fg_expr[i], values, NULL);
bg = AV_RN32(s->bg);
if (i == 0 && (s->x >= outlink->w || s->slide == 3)) {
if (s->slide == 0 || s->slide == 1)
s->x = 0;
if (s->slide == 2) {
s->x = outlink->w - 1;
for (j = 0; j < outlink->h; j++) {
memmove(out
->data
[0] + j
* out
->linesize
[0] , out->data[0] + j * out->linesize[0] + 4,
(outlink->w - 1) * 4);
}
} else if (s->slide == 3) {
s->x = 0;
for (j = 0; j < outlink->h; j++) {
memmove(out
->data
[0] + j
* out
->linesize
[0] + 4, out->data[0] + j * out->linesize[0],
(outlink->w - 1) * 4);
}
} else if (s->slide == 0) {
clear_image(s, out, outlink);
}
}
x = s->x;
y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
switch (s->mode) {
case 0:
if (i == 0 && (s->slide > 0))
for (j = 0; j < outlink->h; j++)
draw_dot(bg, x, j, out);
old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
for (j = y; j < outlink->h; j++) {
if (old != bg &&
(AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
draw_dot(fg, x, j, out);
break;
}
draw_dot(fg, x, j, out);
}
break;
case 1:
if (i == 0 && (s->slide > 0))
for (j = 0; j < outlink->h; j++)
draw_dot(bg, x, j, out);
draw_dot(fg, x, y, out);
break;
case 2:
if (s->first) {
s->first = 0;
s->prev_y[i] = y;
}
if (i == 0 && (s->slide > 0)) {
for (j = 0; j < y; j++)
draw_dot(bg, x, j, out);
for (j = outlink->h - 1; j > y; j--)
draw_dot(bg, x, j, out);
}
if (y <= s->prev_y[i]) {
for (j = y; j <= s->prev_y[i]; j++)
draw_dot(fg, x, j, out);
} else {
for (j = s->prev_y[i]; j <= y; j++)
draw_dot(fg, x, j, out);
}
s->prev_y[i] = y;
break;
}
}
s->x++;
av_frame_free(&in);
return ff_filter_frame(outlink, av_frame_clone(s->out));
}
static int config_output(AVFilterLink *outlink)
{
DrawGraphContext *s = outlink->src->priv;
outlink->w = s->w;
outlink->h = s->h;
outlink->sample_aspect_ratio = (AVRational){1,1};
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
DrawGraphContext *s = ctx->priv;
int i;
for (i = 0; i < 4; i++)
av_expr_free(s->fg_expr[i]);
av_frame_free(&s->out);
}
#if CONFIG_DRAWGRAPH_FILTER
AVFILTER_DEFINE_CLASS(drawgraph);
static const AVFilterPad drawgraph_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad drawgraph_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_drawgraph = {
.name = "drawgraph",
.description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
.priv_size = sizeof(DrawGraphContext),
.priv_class = &drawgraph_class,
.query_formats = query_formats,
.init = init,
.uninit = uninit,
.inputs = drawgraph_inputs,
.outputs = drawgraph_outputs,
};
#endif // CONFIG_DRAWGRAPH_FILTER
#if CONFIG_ADRAWGRAPH_FILTER
#define adrawgraph_options drawgraph_options
AVFILTER_DEFINE_CLASS(adrawgraph);
static const AVFilterPad adrawgraph_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad adrawgraph_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_avf_adrawgraph = {
.name = "adrawgraph",
.description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
.priv_size = sizeof(DrawGraphContext),
.priv_class = &adrawgraph_class,
.query_formats = query_formats,
.init = init,
.uninit = uninit,
.inputs = adrawgraph_inputs,
.outputs = adrawgraph_outputs,
};
#endif // CONFIG_ADRAWGRAPH_FILTER