/*
* Copyright (c) 2017 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/attributes.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
static const char *const var_names[] = {
"w", ///< width of the input video
"h", ///< height of the input video
"val", ///< input value for the pixel
"ymin",
"umin",
"vmin",
"amin",
"ymax",
"umax",
"vmax",
"amax",
NULL
};
enum var_name {
VAR_W,
VAR_H,
VAR_VAL,
VAR_YMIN,
VAR_UMIN,
VAR_VMIN,
VAR_AMIN,
VAR_YMAX,
VAR_UMAX,
VAR_VMAX,
VAR_AMAX,
VAR_VARS_NB
};
typedef struct PseudoColorContext {
const AVClass *class;
int max;
int index;
int nb_planes;
int color;
int linesize[4];
int width[4], height[4];
double var_values[VAR_VARS_NB];
char *comp_expr_str[4];
AVExpr *comp_expr[4];
float lut[4][256*256];
void (*filter[4])(int max, int width, int height,
const uint8_t *index, const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut);
} PseudoColorContext;
#define OFFSET(x) offsetof(PseudoColorContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption pseudocolor_options[] = {
{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "i", "set component as base", OFFSET(index), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, .flags = FLAGS },
{ NULL }
};
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_GBRP,
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_GBRAP,
AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUVA422P9,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUVA420P9,
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUVA420P10,
AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUVA422P10,
AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV422P12,
AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUV420P14,
AV_PIX_FMT_YUV422P14,
AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUVA420P16,
AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUVA422P16,
AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, fmts_list);
}
static void pseudocolor_filter(int max, int width, int height,
const uint8_t *index,
const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize;
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_11(int max, int width, int height,
const uint8_t *index,
const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[(y << 1) * ilinesize + (x << 1)]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_11d(int max, int width, int height,
const uint8_t *index,
const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[(y >> 1) * ilinesize + (x >> 1)]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_10(int max, int width, int height,
const uint8_t *index,
const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x << 1]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize;
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_10d(int max, int width, int height,
const uint8_t *index,
const uint8_t *src,
uint8_t *dst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x >> 1]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize;
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_16(int max, int width, int height,
const uint8_t *iindex,
const uint8_t *ssrc,
uint8_t *ddst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize / 2;
src += slinesize / 2;
dst += dlinesize / 2;
}
}
static void pseudocolor_filter_16_10(int max, int width, int height,
const uint8_t *iindex,
const uint8_t *ssrc,
uint8_t *ddst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x << 1]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize / 2;
src += slinesize / 2;
dst += dlinesize / 2;
}
}
static void pseudocolor_filter_16_10d(int max, int width, int height,
const uint8_t *iindex,
const uint8_t *ssrc,
uint8_t *ddst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[x >> 1]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
index += ilinesize / 2;
src += slinesize / 2;
dst += dlinesize / 2;
}
}
static void pseudocolor_filter_16_11(int max, int width, int height,
const uint8_t *iindex,
const uint8_t *ssrc,
uint8_t *ddst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
ilinesize /= 2;
dlinesize /= 2;
slinesize /= 2;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[(y << 1) * ilinesize + (x << 1)]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
src += slinesize;
dst += dlinesize;
}
}
static void pseudocolor_filter_16_11d(int max, int width, int height,
const uint8_t *iindex,
const uint8_t *ssrc,
uint8_t *ddst,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
ilinesize /= 2;
dlinesize /= 2;
slinesize /= 2;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
int v = lut[index[(y >> 1) * ilinesize + (x >> 1)]];
if (v >= 0 && v <= max) {
dst[x] = v;
} else {
dst[x] = src[x];
}
}
src += slinesize;
dst += dlinesize;
}
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
PseudoColorContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int depth, ret, hsub, vsub, color;
depth = desc->comp[0].depth;
s->max = (1 << depth) - 1;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
if (s->index >= s->nb_planes) {
av_log(ctx, AV_LOG_ERROR, "index out of allowed range\n");
return AVERROR(EINVAL);
}
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
s->var_values[VAR_W] = inlink->w;
s->var_values[VAR_H] = inlink->h;
s->var_values[VAR_YMIN] = 16 * (1 << (depth - 8));
s->var_values[VAR_UMIN] = 16 * (1 << (depth - 8));
s->var_values[VAR_VMIN] = 16 * (1 << (depth - 8));
s->var_values[VAR_AMIN] = 0;
s->var_values[VAR_YMAX] = 235 * (1 << (depth - 8));
s->var_values[VAR_UMAX] = 240 * (1 << (depth - 8));
s->var_values[VAR_VMAX] = 240 * (1 << (depth - 8));
s->var_values[VAR_AMAX] = s->max;
for (color = 0; color < s->nb_planes; color++) {
double res;
int val;
/* create the parsed expression */
av_expr_free(s->comp_expr[color]);
s->comp_expr[color] = NULL;
ret = av_expr_parse(&s->comp_expr[color], s->comp_expr_str[color],
var_names, NULL, NULL, NULL, NULL, 0, ctx);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR,
"Error when parsing the expression '%s' for the component %d and color %d.\n",
s->comp_expr_str[color], color, color);
return AVERROR(EINVAL);
}
/* compute the lut */
for (val = 0; val < FF_ARRAY_ELEMS(s->lut[color]); val++) {
s->var_values[VAR_VAL] = val;
res = av_expr_eval(s->comp_expr[color], s->var_values, s);
if (isnan(res)) {
av_log(ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s' for the value %d for the component %d.\n",
s->comp_expr_str[color], val, color);
return AVERROR(EINVAL);
}
s->lut[color][val] = res;
}
}
switch (inlink->format) {
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUVA444P:
case AV_PIX_FMT_GBRP:
case AV_PIX_FMT_GBRAP:
case AV_PIX_FMT_GRAY8:
s->filter[0] = s->filter[1] = s->filter[2] = s->filter[3] = pseudocolor_filter;
break;
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUVA420P:
switch (s->index) {
case 0:
case 3:
s->filter[0] = s->filter[3] = pseudocolor_filter;
s->filter[1] = s->filter[2] = pseudocolor_filter_11;
break;
case 1:
case 2:
s->filter[0] = s->filter[3] = pseudocolor_filter_11d;
s->filter[1] = s->filter[2] = pseudocolor_filter;
break;
}
break;
case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUVA422P:
switch (s->index) {
case 0:
case 3:
s->filter[0] = s->filter[3] = pseudocolor_filter;
s->filter[1] = s->filter[2] = pseudocolor_filter_10;
break;
case 1:
case 2:
s->filter[0] = s->filter[3] = pseudocolor_filter_10d;
s->filter[1] = s->filter[2] = pseudocolor_filter;
break;
}
break;
case AV_PIX_FMT_YUV444P9:
case AV_PIX_FMT_YUVA444P9:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUVA444P10:
case AV_PIX_FMT_YUV444P12:
case AV_PIX_FMT_YUV444P14:
case AV_PIX_FMT_YUV444P16:
case AV_PIX_FMT_YUVA444P16:
case AV_PIX_FMT_GBRP10:
case AV_PIX_FMT_GBRAP10:
case AV_PIX_FMT_GBRP16:
case AV_PIX_FMT_GBRAP16:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY16:
s->filter[0] = s->filter[1] = s->filter[2] = s->filter[3] = pseudocolor_filter_16;
break;
case AV_PIX_FMT_YUV422P9:
case AV_PIX_FMT_YUVA422P9:
case AV_PIX_FMT_YUV422P10:
case AV_PIX_FMT_YUVA422P10:
case AV_PIX_FMT_YUV422P12:
case AV_PIX_FMT_YUV422P14:
case AV_PIX_FMT_YUV422P16:
case AV_PIX_FMT_YUVA422P16:
switch (s->index) {
case 0:
case 3:
s->filter[0] = s->filter[3] = pseudocolor_filter_16;
s->filter[1] = s->filter[2] = pseudocolor_filter_16_10;
break;
case 1:
case 2:
s->filter[0] = s->filter[3] = pseudocolor_filter_16_10d;
s->filter[1] = s->filter[2] = pseudocolor_filter_16;
break;
}
break;
case AV_PIX_FMT_YUV420P9:
case AV_PIX_FMT_YUVA420P9:
case AV_PIX_FMT_YUV420P10:
case AV_PIX_FMT_YUVA420P10:
case AV_PIX_FMT_YUV420P12:
case AV_PIX_FMT_YUV420P14:
case AV_PIX_FMT_YUV420P16:
case AV_PIX_FMT_YUVA420P16:
switch (s->index) {
case 0:
case 3:
s->filter[0] = s->filter[3] = pseudocolor_filter_16;
s->filter[1] = s->filter[2] = pseudocolor_filter_16_11;
break;
case 1:
case 2:
s->filter[0] = s->filter[3] = pseudocolor_filter_16_11d;
s->filter[1] = s->filter[2] = pseudocolor_filter_16;
break;
}
break;
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
PseudoColorContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
int plane;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
for (plane = 0; plane < s->nb_planes; plane++) {
const uint8_t *index = in->data[s->index];
const uint8_t *src = in->data[plane];
uint8_t *dst = out->data[plane];
ptrdiff_t ilinesize = in->linesize[s->index];
ptrdiff_t slinesize = in->linesize[plane];
ptrdiff_t dlinesize = out->linesize[plane];
s->filter[plane](s->max, s->width[plane], s->height[plane],
index, src, dst, ilinesize, slinesize,
dlinesize, s->lut[plane]);
}
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,
},
{ NULL }
};
static av_cold void uninit(AVFilterContext *ctx)
{
PseudoColorContext *s = ctx->priv;
int i;
for (i = 0; i < 4; i++) {
av_expr_free(s->comp_expr[i]);
s->comp_expr[i] = NULL;
}
}
AVFILTER_DEFINE_CLASS(pseudocolor);
AVFilter ff_vf_pseudocolor = {
.name = "pseudocolor",
.description = NULL_IF_CONFIG_SMALL("Make pseudocolored video frames."),
.priv_size = sizeof(PseudoColorContext),
.priv_class = &pseudocolor_class,
.uninit = uninit,
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};