/*
* Copyright (c) 2012-2013 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/avassert.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct HistogramContext {
const AVClass *class; ///< AVClass context for log and options purpose
unsigned histogram[256*256];
int histogram_size;
int mult;
int ncomp;
int dncomp;
uint8_t bg_color[4];
uint8_t fg_color[4];
int level_height;
int scale_height;
int display_mode;
int levels_mode;
const AVPixFmtDescriptor *desc, *odesc;
int components;
float fgopacity;
float bgopacity;
int planewidth[4];
int planeheight[4];
} HistogramContext;
#define OFFSET(x) offsetof(HistogramContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption histogram_options[] = {
{ "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS},
{ "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS},
{ "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"},
{ "d", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "display_mode"},
{ "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" },
{ "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" },
{ "stack", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "display_mode" },
{ "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"},
{ "m", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"},
{ "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" },
{ "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" },
{ "components", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
{ "c", "set color components to display", OFFSET(components), AV_OPT_TYPE_INT, {.i64=7}, 1, 15, FLAGS},
{ "fgopacity", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
{ "f", "set foreground opacity", OFFSET(fgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.7}, 0, 1, FLAGS},
{ "bgopacity", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ "b", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS},
{ NULL }
};
AVFILTER_DEFINE_CLASS(histogram);
static const enum AVPixelFormat levels_in_pix_fmts[] = {
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv8_pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv9_pix_fmts[] = {
AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv10_pix_fmts[] = {
AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_yuv12_pix_fmts[] = {
AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb8_pix_fmts[] = {
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRP,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb9_pix_fmts[] = {
AV_PIX_FMT_GBRP9,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb10_pix_fmts[] = {
AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_NONE
};
static const enum AVPixelFormat levels_out_rgb12_pix_fmts[] = {
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *avff;
const AVPixFmtDescriptor *desc;
const enum AVPixelFormat *out_pix_fmts;
int rgb, i, bits;
int ret;
if (!ctx->inputs[0]->in_formats ||
!ctx->inputs[0]->in_formats->nb_formats) {
return AVERROR(EAGAIN);
}
if (!ctx->inputs[0]->out_formats)
if ((ret = ff_formats_ref(ff_make_format_list(levels_in_pix_fmts), &ctx->inputs[0]->out_formats)) < 0)
return ret;
avff = ctx->inputs[0]->in_formats;
desc = av_pix_fmt_desc_get(avff->formats[0]);
rgb = desc->flags & AV_PIX_FMT_FLAG_RGB;
bits = desc->comp[0].depth;
for (i = 1; i < avff->nb_formats; i++) {
desc = av_pix_fmt_desc_get(avff->formats[i]);
if ((rgb != (desc->flags & AV_PIX_FMT_FLAG_RGB)) ||
(bits != desc->comp[0].depth))
return AVERROR(EAGAIN);
}
if (rgb && bits == 8)
out_pix_fmts = levels_out_rgb8_pix_fmts;
else if (rgb && bits == 9)
out_pix_fmts = levels_out_rgb9_pix_fmts;
else if (rgb && bits == 10)
out_pix_fmts = levels_out_rgb10_pix_fmts;
else if (rgb && bits == 12)
out_pix_fmts = levels_out_rgb12_pix_fmts;
else if (bits == 8)
out_pix_fmts = levels_out_yuv8_pix_fmts;
else if (bits == 9)
out_pix_fmts = levels_out_yuv9_pix_fmts;
else if (bits == 10)
out_pix_fmts = levels_out_yuv10_pix_fmts;
else if (bits == 12)
out_pix_fmts = levels_out_yuv12_pix_fmts;
else
return AVERROR(EAGAIN);
if ((ret = ff_formats_ref(ff_make_format_list(out_pix_fmts), &ctx->outputs[0]->in_formats)) < 0)
return ret;
return 0;
}
static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 };
static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 };
static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 };
static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 };
static int config_input(AVFilterLink *inlink)
{
HistogramContext *h = inlink->dst->priv;
h->desc = av_pix_fmt_desc_get(inlink->format);
h->ncomp = h->desc->nb_components;
h->histogram_size = 1 << h->desc->comp[0].depth;
h->mult = h->histogram_size / 256;
switch (inlink->format) {
case AV_PIX_FMT_GBRAP12:
case AV_PIX_FMT_GBRP12:
case AV_PIX_FMT_GBRAP10:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRP9:
case AV_PIX_FMT_GBRAP:
case AV_PIX_FMT_GBRP:
memcpy(h->bg_color, black_gbrp_color, 4);
memcpy(h->fg_color, white_gbrp_color, 4);
break;
default:
memcpy(h->bg_color, black_yuva_color, 4);
memcpy(h->fg_color, white_yuva_color, 4);
}
h->fg_color[3] = h->fgopacity * 255;
h->bg_color[3] = h->bgopacity * 255;
h->planeheight[1] = h->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, h->desc->log2_chroma_h);
h->planeheight[0] = h->planeheight[3] = inlink->h;
h->planewidth[1] = h->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, h->desc->log2_chroma_w);
h->planewidth[0] = h->planewidth[3] = inlink->w;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
HistogramContext *h = ctx->priv;
int ncomp = 0, i;
for (i = 0; i < h->ncomp; i++) {
if ((1 << i) & h->components)
ncomp++;
}
outlink->w = h->histogram_size * FFMAX(ncomp * (h->display_mode == 1), 1);
outlink->h = (h->level_height + h->scale_height) * FFMAX(ncomp * (h->display_mode == 2), 1);
h->odesc = av_pix_fmt_desc_get(outlink->format);
h->dncomp = h->odesc->nb_components;
outlink->sample_aspect_ratio = (AVRational){1,1};
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
HistogramContext *h = inlink->dst->priv;
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
int i, j, k, l, m;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
out->pts = in->pts;
for (k = 0; k < 4 && out->data[k]; k++) {
const int is_chroma = (k == 1 || k == 2);
const int dst_h = AV_CEIL_RSHIFT(outlink->h, (is_chroma ? h->odesc->log2_chroma_h : 0));
const int dst_w = AV_CEIL_RSHIFT(outlink->w, (is_chroma ? h->odesc->log2_chroma_w : 0));
if (h->histogram_size <= 256) {
for (i = 0; i < dst_h ; i++)
memset(out->data[h->odesc->comp[k].plane] +
i * out->linesize[h->odesc->comp[k].plane],
h->bg_color[k], dst_w);
} else {
const int mult = h->mult;
for (i = 0; i < dst_h ; i++)
for (j = 0; j < dst_w; j++)
AV_WN16(out->data[h->odesc->comp[k].plane] +
i * out->linesize[h->odesc->comp[k].plane] + j * 2,
h->bg_color[k] * mult);
}
}
for (m = 0, k = 0; k < h->ncomp; k++) {
const int p = h->desc->comp[k].plane;
const int height = h->planeheight[p];
const int width = h->planewidth[p];
double max_hval_log;
unsigned max_hval = 0;
int start, startx;
if (!((1 << k) & h->components))
continue;
startx = m * h->histogram_size * (h->display_mode == 1);
start = m++ * (h->level_height + h->scale_height) * (h->display_mode == 2);
if (h->histogram_size <= 256) {
for (i = 0; i < height; i++) {
const uint8_t *src = in->data[p] + i * in->linesize[p];
for (j = 0; j < width; j++)
h->histogram[src[j]]++;
}
} else {
for (i = 0; i < height; i++) {
const uint16_t *src = (const uint16_t *)(in->data[p] + i * in->linesize[p]);
for (j = 0; j < width; j++)
h->histogram[src[j]]++;
}
}
for (i = 0; i < h->histogram_size; i++)
max_hval = FFMAX(max_hval, h->histogram[i]);
max_hval_log = log2(max_hval + 1);
for (i = 0; i < h->histogram_size; i++) {
int col_height;
if (h->levels_mode)
col_height = lrint(h->level_height * (1. - (log2(h->histogram[i] + 1) / max_hval_log)));
else
col_height = h->level_height - (h->histogram[i] * (int64_t)h->level_height + max_hval - 1) / max_hval;
if (h->histogram_size <= 256) {
for (j = h->level_height - 1; j >= col_height; j--) {
if (h->display_mode) {
for (l = 0; l < h->dncomp; l++)
out->data[l][(j + start) * out->linesize[l] + startx + i] = h->fg_color[l];
} else {
out->data[p][(j + start) * out->linesize[p] + startx + i] = 255;
}
}
for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--)
out->data[p][(j + start) * out->linesize[p] + startx + i] = i;
} else {
const int mult = h->mult;
for (j = h->level_height - 1; j >= col_height; j--) {
if (h->display_mode) {
for (l = 0; l < h->dncomp; l++)
AV_WN16(out->data[l] + (j + start) * out->linesize[l] + startx * 2 + i * 2, h->fg_color[l] * mult);
} else {
AV_WN16(out->data[p] + (j + start) * out->linesize[p] + startx * 2 + i * 2, 255 * mult);
}
}
for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--)
AV_WN16(out->data[p] + (j + start) * out->linesize[p] + startx * 2 + i * 2, i);
}
}
memset(h->histogram, 0, h->histogram_size * sizeof(unsigned));
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_histogram = {
.name = "histogram",
.description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."),
.priv_size = sizeof(HistogramContext),
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.priv_class = &histogram_class,
};