507 lines
19 KiB
C
507 lines
19 KiB
C
/*
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* Copyright (C) 2006 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (C) 2012 Clément Bœsch <u pkh me>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Generic equation change filter
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* Originally written by Michael Niedermayer for the MPlayer project, and
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* ported by Clément Bœsch for FFmpeg.
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/eval.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "internal.h"
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#define MAX_NB_THREADS 32
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#define NB_PLANES 4
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enum InterpolationMethods {
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INTERP_NEAREST,
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INTERP_BILINEAR,
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NB_INTERP
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};
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static const char *const var_names[] = { "X", "Y", "W", "H", "N", "SW", "SH", "T", NULL };
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enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_N, VAR_SW, VAR_SH, VAR_T, VAR_VARS_NB };
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typedef struct GEQContext {
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const AVClass *class;
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AVExpr *e[NB_PLANES][MAX_NB_THREADS]; ///< expressions for each plane and thread
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char *expr_str[4+3]; ///< expression strings for each plane
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AVFrame *picref; ///< current input buffer
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uint8_t *dst; ///< reference pointer to the 8bits output
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uint16_t *dst16; ///< reference pointer to the 16bits output
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double values[VAR_VARS_NB]; ///< expression values
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int hsub, vsub; ///< chroma subsampling
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int planes; ///< number of planes
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int interpolation;
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int is_rgb;
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int bps;
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double *pixel_sums[NB_PLANES];
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int needs_sum[NB_PLANES];
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} GEQContext;
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enum { Y = 0, U, V, A, G, B, R };
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#define OFFSET(x) offsetof(GEQContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption geq_options[] = {
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{ "lum_expr", "set luminance expression", OFFSET(expr_str[Y]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "lum", "set luminance expression", OFFSET(expr_str[Y]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "cb_expr", "set chroma blue expression", OFFSET(expr_str[U]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "cb", "set chroma blue expression", OFFSET(expr_str[U]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "cr_expr", "set chroma red expression", OFFSET(expr_str[V]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "cr", "set chroma red expression", OFFSET(expr_str[V]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "alpha_expr", "set alpha expression", OFFSET(expr_str[A]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "a", "set alpha expression", OFFSET(expr_str[A]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "red_expr", "set red expression", OFFSET(expr_str[R]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "r", "set red expression", OFFSET(expr_str[R]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "green_expr", "set green expression", OFFSET(expr_str[G]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "g", "set green expression", OFFSET(expr_str[G]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "blue_expr", "set blue expression", OFFSET(expr_str[B]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "b", "set blue expression", OFFSET(expr_str[B]), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "interpolation","set interpolation method", OFFSET(interpolation), AV_OPT_TYPE_INT, {.i64=INTERP_BILINEAR}, 0, NB_INTERP-1, FLAGS, "interp" },
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{ "i", "set interpolation method", OFFSET(interpolation), AV_OPT_TYPE_INT, {.i64=INTERP_BILINEAR}, 0, NB_INTERP-1, FLAGS, "interp" },
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{ "nearest", "nearest interpolation", 0, AV_OPT_TYPE_CONST, {.i64=INTERP_NEAREST}, 0, 0, FLAGS, "interp" },
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{ "n", "nearest interpolation", 0, AV_OPT_TYPE_CONST, {.i64=INTERP_NEAREST}, 0, 0, FLAGS, "interp" },
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{ "bilinear", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=INTERP_BILINEAR}, 0, 0, FLAGS, "interp" },
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{ "b", "bilinear interpolation", 0, AV_OPT_TYPE_CONST, {.i64=INTERP_BILINEAR}, 0, 0, FLAGS, "interp" },
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{NULL},
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};
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AVFILTER_DEFINE_CLASS(geq);
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static inline double getpix(void *priv, double x, double y, int plane)
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{
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int xi, yi;
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GEQContext *geq = priv;
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AVFrame *picref = geq->picref;
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const uint8_t *src = picref->data[plane];
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int linesize = picref->linesize[plane];
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const int w = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(picref->width, geq->hsub) : picref->width;
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const int h = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(picref->height, geq->vsub) : picref->height;
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if (!src)
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return 0;
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if (geq->interpolation == INTERP_BILINEAR) {
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xi = x = av_clipd(x, 0, w - 2);
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yi = y = av_clipd(y, 0, h - 2);
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x -= xi;
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y -= yi;
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if (geq->bps > 8) {
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const uint16_t *src16 = (const uint16_t*)src;
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linesize /= 2;
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return (1-y)*((1-x)*src16[xi + yi * linesize] + x*src16[xi + 1 + yi * linesize])
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+ y *((1-x)*src16[xi + (yi+1) * linesize] + x*src16[xi + 1 + (yi+1) * linesize]);
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} else {
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return (1-y)*((1-x)*src[xi + yi * linesize] + x*src[xi + 1 + yi * linesize])
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+ y *((1-x)*src[xi + (yi+1) * linesize] + x*src[xi + 1 + (yi+1) * linesize]);
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}
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} else {
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xi = av_clipd(x, 0, w - 1);
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yi = av_clipd(y, 0, h - 1);
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if (geq->bps > 8) {
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const uint16_t *src16 = (const uint16_t*)src;
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linesize /= 2;
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return src16[xi + yi * linesize];
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} else {
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return src[xi + yi * linesize];
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}
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}
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}
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static int calculate_sums(GEQContext *geq, int plane, int w, int h)
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{
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int xi, yi;
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AVFrame *picref = geq->picref;
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const uint8_t *src = picref->data[plane];
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int linesize = picref->linesize[plane];
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if (!geq->pixel_sums[plane])
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geq->pixel_sums[plane] = av_malloc_array(w, h * sizeof (*geq->pixel_sums[plane]));
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if (!geq->pixel_sums[plane])
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return AVERROR(ENOMEM);
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if (geq->bps > 8)
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linesize /= 2;
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for (yi = 0; yi < h; yi ++) {
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if (geq->bps > 8) {
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const uint16_t *src16 = (const uint16_t*)src;
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double linesum = 0;
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for (xi = 0; xi < w; xi ++) {
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linesum += src16[xi + yi * linesize];
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geq->pixel_sums[plane][xi + yi * w] = linesum;
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}
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} else {
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double linesum = 0;
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for (xi = 0; xi < w; xi ++) {
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linesum += src[xi + yi * linesize];
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geq->pixel_sums[plane][xi + yi * w] = linesum;
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}
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}
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if (yi)
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for (xi = 0; xi < w; xi ++) {
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geq->pixel_sums[plane][xi + yi * w] += geq->pixel_sums[plane][xi + yi * w - w];
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}
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}
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return 0;
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}
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static inline double getpix_integrate_internal(GEQContext *geq, int x, int y, int plane, int w, int h)
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{
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if (x > w - 1) {
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double boundary = getpix_integrate_internal(geq, w - 1, y, plane, w, h);
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return 2*boundary - getpix_integrate_internal(geq, 2*(w - 1) - x, y, plane, w, h);
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} else if (y > h - 1) {
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double boundary = getpix_integrate_internal(geq, x, h - 1, plane, w, h);
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return 2*boundary - getpix_integrate_internal(geq, x, 2*(h - 1) - y, plane, w, h);
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} else if (x < 0) {
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if (x == -1) return 0;
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return - getpix_integrate_internal(geq, -x-2, y, plane, w, h);
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} else if (y < 0) {
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if (y == -1) return 0;
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return - getpix_integrate_internal(geq, x, -y-2, plane, w, h);
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}
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return geq->pixel_sums[plane][x + y * w];
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}
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static inline double getpix_integrate(void *priv, double x, double y, int plane) {
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GEQContext *geq = priv;
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AVFrame *picref = geq->picref;
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const uint8_t *src = picref->data[plane];
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const int w = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(picref->width, geq->hsub) : picref->width;
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const int h = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(picref->height, geq->vsub) : picref->height;
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if (!src)
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return 0;
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return getpix_integrate_internal(geq, lrint(av_clipd(x, -w, 2*w)), lrint(av_clipd(y, -h, 2*h)), plane, w, h);
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}
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//TODO: cubic interpolate
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//TODO: keep the last few frames
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static double lum(void *priv, double x, double y) { return getpix(priv, x, y, 0); }
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static double cb(void *priv, double x, double y) { return getpix(priv, x, y, 1); }
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static double cr(void *priv, double x, double y) { return getpix(priv, x, y, 2); }
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static double alpha(void *priv, double x, double y) { return getpix(priv, x, y, 3); }
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static double lumsum(void *priv, double x, double y) { return getpix_integrate(priv, x, y, 0); }
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static double cbsum(void *priv, double x, double y) { return getpix_integrate(priv, x, y, 1); }
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static double crsub(void *priv, double x, double y) { return getpix_integrate(priv, x, y, 2); }
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static double alphasum(void *priv, double x, double y) { return getpix_integrate(priv, x, y, 3); }
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static av_cold int geq_init(AVFilterContext *ctx)
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{
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GEQContext *geq = ctx->priv;
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int plane, ret = 0;
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if (!geq->expr_str[Y] && !geq->expr_str[G] && !geq->expr_str[B] && !geq->expr_str[R]) {
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av_log(ctx, AV_LOG_ERROR, "A luminance or RGB expression is mandatory\n");
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ret = AVERROR(EINVAL);
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goto end;
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}
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geq->is_rgb = !geq->expr_str[Y];
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if ((geq->expr_str[Y] || geq->expr_str[U] || geq->expr_str[V]) && (geq->expr_str[G] || geq->expr_str[B] || geq->expr_str[R])) {
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av_log(ctx, AV_LOG_ERROR, "Either YCbCr or RGB but not both must be specified\n");
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ret = AVERROR(EINVAL);
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goto end;
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}
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if (!geq->expr_str[U] && !geq->expr_str[V]) {
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/* No chroma at all: fallback on luma */
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geq->expr_str[U] = av_strdup(geq->expr_str[Y]);
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geq->expr_str[V] = av_strdup(geq->expr_str[Y]);
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} else {
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/* One chroma unspecified, fallback on the other */
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if (!geq->expr_str[U]) geq->expr_str[U] = av_strdup(geq->expr_str[V]);
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if (!geq->expr_str[V]) geq->expr_str[V] = av_strdup(geq->expr_str[U]);
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}
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if (!geq->expr_str[A]) {
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char bps_string[8];
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snprintf(bps_string, sizeof(bps_string), "%d", (1<<geq->bps) - 1);
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geq->expr_str[A] = av_strdup(bps_string);
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}
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if (!geq->expr_str[G])
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geq->expr_str[G] = av_strdup("g(X,Y)");
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if (!geq->expr_str[B])
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geq->expr_str[B] = av_strdup("b(X,Y)");
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if (!geq->expr_str[R])
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geq->expr_str[R] = av_strdup("r(X,Y)");
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if (geq->is_rgb ?
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(!geq->expr_str[G] || !geq->expr_str[B] || !geq->expr_str[R])
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:
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(!geq->expr_str[U] || !geq->expr_str[V] || !geq->expr_str[A])) {
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ret = AVERROR(ENOMEM);
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goto end;
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}
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for (plane = 0; plane < NB_PLANES; plane++) {
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static double (*p[])(void *, double, double) = {
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lum , cb , cr , alpha ,
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lumsum, cbsum, crsub, alphasum,
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};
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static const char *const func2_yuv_names[] = {
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"lum" , "cb" , "cr" , "alpha" , "p",
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"lumsum", "cbsum", "crsum", "alphasum", "psum",
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NULL };
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static const char *const func2_rgb_names[] = {
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"g" , "b" , "r" , "alpha" , "p",
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"gsum", "bsum", "rsum", "alphasum", "psum",
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NULL };
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const char *const *func2_names = geq->is_rgb ? func2_rgb_names : func2_yuv_names;
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double (*func2[])(void *, double, double) = {
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lum , cb , cr , alpha , p[plane],
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lumsum, cbsum, crsub, alphasum, p[plane + 4],
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NULL };
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int counter[10] = {0};
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for (int i = 0; i < MAX_NB_THREADS; i++) {
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ret = av_expr_parse(&geq->e[plane][i], geq->expr_str[plane < 3 && geq->is_rgb ? plane+4 : plane], var_names,
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NULL, NULL, func2_names, func2, 0, ctx);
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if (ret < 0)
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goto end;
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}
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av_expr_count_func(geq->e[plane][0], counter, FF_ARRAY_ELEMS(counter), 2);
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geq->needs_sum[plane] = counter[5] + counter[6] + counter[7] + counter[8] + counter[9];
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}
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end:
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return ret;
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}
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static int geq_query_formats(AVFilterContext *ctx)
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{
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GEQContext *geq = ctx->priv;
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static const enum AVPixelFormat yuv_pix_fmts[] = {
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA420P9,
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AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_YUV440P10,
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AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA420P10,
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AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
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AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
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AV_PIX_FMT_YUVA444P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA420P16,
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AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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static const enum AVPixelFormat rgb_pix_fmts[] = {
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
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AV_PIX_FMT_GBRP9,
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AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12,
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AV_PIX_FMT_GBRP14,
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AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *fmts_list;
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if (geq->is_rgb) {
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fmts_list = ff_make_format_list(rgb_pix_fmts);
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} else
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fmts_list = ff_make_format_list(yuv_pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static int geq_config_props(AVFilterLink *inlink)
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{
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GEQContext *geq = inlink->dst->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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av_assert0(desc);
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geq->hsub = desc->log2_chroma_w;
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geq->vsub = desc->log2_chroma_h;
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geq->bps = desc->comp[0].depth;
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geq->planes = desc->nb_components;
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return 0;
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}
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typedef struct ThreadData {
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int height;
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int width;
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int plane;
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int linesize;
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} ThreadData;
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static int slice_geq_filter(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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GEQContext *geq = ctx->priv;
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ThreadData *td = arg;
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const int height = td->height;
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const int width = td->width;
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const int plane = td->plane;
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const int linesize = td->linesize;
|
|
const int slice_start = (height * jobnr) / nb_jobs;
|
|
const int slice_end = (height * (jobnr+1)) / nb_jobs;
|
|
int x, y;
|
|
|
|
double values[VAR_VARS_NB];
|
|
values[VAR_W] = geq->values[VAR_W];
|
|
values[VAR_H] = geq->values[VAR_H];
|
|
values[VAR_N] = geq->values[VAR_N];
|
|
values[VAR_SW] = geq->values[VAR_SW];
|
|
values[VAR_SH] = geq->values[VAR_SH];
|
|
values[VAR_T] = geq->values[VAR_T];
|
|
|
|
if (geq->bps == 8) {
|
|
uint8_t *ptr = geq->dst + linesize * slice_start;
|
|
for (y = slice_start; y < slice_end; y++) {
|
|
values[VAR_Y] = y;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
values[VAR_X] = x;
|
|
ptr[x] = av_expr_eval(geq->e[plane][jobnr], values, geq);
|
|
}
|
|
ptr += linesize;
|
|
}
|
|
} else {
|
|
uint16_t *ptr16 = geq->dst16 + (linesize/2) * slice_start;
|
|
for (y = slice_start; y < slice_end; y++) {
|
|
values[VAR_Y] = y;
|
|
for (x = 0; x < width; x++) {
|
|
values[VAR_X] = x;
|
|
ptr16[x] = av_expr_eval(geq->e[plane][jobnr], values, geq);
|
|
}
|
|
ptr16 += linesize/2;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int geq_filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
int plane;
|
|
AVFilterContext *ctx = inlink->dst;
|
|
const int nb_threads = FFMIN(MAX_NB_THREADS, ff_filter_get_nb_threads(ctx));
|
|
GEQContext *geq = ctx->priv;
|
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
|
AVFrame *out;
|
|
|
|
geq->values[VAR_N] = inlink->frame_count_out,
|
|
geq->values[VAR_T] = in->pts == AV_NOPTS_VALUE ? NAN : in->pts * av_q2d(inlink->time_base),
|
|
|
|
geq->picref = in;
|
|
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 < geq->planes && out->data[plane]; plane++) {
|
|
const int width = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(inlink->w, geq->hsub) : inlink->w;
|
|
const int height = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(inlink->h, geq->vsub) : inlink->h;
|
|
const int linesize = out->linesize[plane];
|
|
ThreadData td;
|
|
|
|
geq->dst = out->data[plane];
|
|
geq->dst16 = (uint16_t*)out->data[plane];
|
|
|
|
geq->values[VAR_W] = width;
|
|
geq->values[VAR_H] = height;
|
|
geq->values[VAR_SW] = width / (double)inlink->w;
|
|
geq->values[VAR_SH] = height / (double)inlink->h;
|
|
|
|
td.width = width;
|
|
td.height = height;
|
|
td.plane = plane;
|
|
td.linesize = linesize;
|
|
|
|
if (geq->needs_sum[plane])
|
|
calculate_sums(geq, plane, width, height);
|
|
|
|
ctx->internal->execute(ctx, slice_geq_filter, &td, NULL, FFMIN(height, nb_threads));
|
|
}
|
|
|
|
av_frame_free(&geq->picref);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static av_cold void geq_uninit(AVFilterContext *ctx)
|
|
{
|
|
int i;
|
|
GEQContext *geq = ctx->priv;
|
|
|
|
for (i = 0; i < NB_PLANES; i++)
|
|
for (int j = 0; j < MAX_NB_THREADS; j++)
|
|
av_expr_free(geq->e[i][j]);
|
|
for (i = 0; i < NB_PLANES; i++)
|
|
av_freep(&geq->pixel_sums);
|
|
}
|
|
|
|
static const AVFilterPad geq_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = geq_config_props,
|
|
.filter_frame = geq_filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad geq_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_geq = {
|
|
.name = "geq",
|
|
.description = NULL_IF_CONFIG_SMALL("Apply generic equation to each pixel."),
|
|
.priv_size = sizeof(GEQContext),
|
|
.init = geq_init,
|
|
.uninit = geq_uninit,
|
|
.query_formats = geq_query_formats,
|
|
.inputs = geq_inputs,
|
|
.outputs = geq_outputs,
|
|
.priv_class = &geq_class,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|