mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
8 years ago
parent
3c99523a28
commit
e3a4afca07
6 changed files with 305 additions and 1 deletions
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/*
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* Copyright (c) 2017 Paul B Mahol |
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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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#include "libavutil/attributes.h" |
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#include "libavutil/common.h" |
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#include "libavutil/eval.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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static const char *const var_names[] = { |
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"w", ///< width of the input video
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"h", ///< height of the input video
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"val", ///< input value for the pixel
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"ymin", |
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"umin", |
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"vmin", |
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"amin", |
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"ymax", |
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"umax", |
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"vmax", |
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"amax", |
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NULL |
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}; |
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enum var_name { |
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VAR_W, |
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VAR_H, |
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VAR_VAL, |
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VAR_YMIN, |
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VAR_UMIN, |
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VAR_VMIN, |
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VAR_AMIN, |
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VAR_YMAX, |
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VAR_UMAX, |
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VAR_VMAX, |
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VAR_AMAX, |
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VAR_VARS_NB |
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}; |
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typedef struct PseudoColorContext { |
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const AVClass *class; |
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int max; |
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int index; |
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int nb_planes; |
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int color; |
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int linesize[4]; |
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int width[4], height[4]; |
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double var_values[VAR_VARS_NB]; |
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char *comp_expr_str[4]; |
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AVExpr *comp_expr[4]; |
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float lut[4][256]; |
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} PseudoColorContext; |
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#define OFFSET(x) offsetof(PseudoColorContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption pseudocolor_options[] = { |
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{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS }, |
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{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS }, |
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{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS }, |
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{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS }, |
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{ "i", "set component as base", OFFSET(index), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, .flags = FLAGS }, |
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{ NULL } |
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}; |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_GRAY8, |
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_GBRP, |
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_GBRAP, |
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AV_PIX_FMT_NONE |
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}; |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *fmts_list = ff_make_format_list(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 config_input(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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PseudoColorContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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int depth, ret, hsub, vsub, color; |
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depth = desc->comp[0].depth; |
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s->max = (1 << depth) - 1; |
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s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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if (s->index >= s->nb_planes) { |
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av_log(ctx, AV_LOG_ERROR, "index out of allowed range\n"); |
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return AVERROR(EINVAL); |
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} |
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if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
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return ret; |
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hsub = desc->log2_chroma_w; |
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vsub = desc->log2_chroma_h; |
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s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub); |
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s->height[0] = s->height[3] = inlink->h; |
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s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub); |
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s->width[0] = s->width[3] = inlink->w; |
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s->var_values[VAR_W] = inlink->w; |
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s->var_values[VAR_H] = inlink->h; |
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s->var_values[VAR_YMIN] = 16 * (1 << (depth - 8)); |
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s->var_values[VAR_UMIN] = 16 * (1 << (depth - 8)); |
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s->var_values[VAR_VMIN] = 16 * (1 << (depth - 8)); |
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s->var_values[VAR_AMIN] = 0; |
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s->var_values[VAR_YMAX] = 235 * (1 << (depth - 8)); |
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s->var_values[VAR_UMAX] = 240 * (1 << (depth - 8)); |
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s->var_values[VAR_VMAX] = 240 * (1 << (depth - 8)); |
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s->var_values[VAR_AMAX] = s->max; |
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for (color = 0; color < s->nb_planes; color++) { |
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double res; |
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int val; |
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/* create the parsed expression */ |
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av_expr_free(s->comp_expr[color]); |
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s->comp_expr[color] = NULL; |
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ret = av_expr_parse(&s->comp_expr[color], s->comp_expr_str[color], |
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var_names, NULL, NULL, NULL, NULL, 0, ctx); |
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if (ret < 0) { |
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av_log(ctx, AV_LOG_ERROR, |
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"Error when parsing the expression '%s' for the component %d and color %d.\n", |
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s->comp_expr_str[color], color, color); |
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return AVERROR(EINVAL); |
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} |
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/* compute the lut */ |
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for (val = 0; val < FF_ARRAY_ELEMS(s->lut[color]); val++) { |
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s->var_values[VAR_VAL] = val; |
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res = av_expr_eval(s->comp_expr[color], s->var_values, s); |
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if (isnan(res)) { |
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av_log(ctx, AV_LOG_ERROR, |
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"Error when evaluating the expression '%s' for the value %d for the component %d.\n", |
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s->comp_expr_str[color], val, color); |
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return AVERROR(EINVAL); |
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} |
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s->lut[color][val] = res; |
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} |
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} |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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PseudoColorContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AVFrame *out; |
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int x, y, plane; |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) { |
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av_frame_free(&in); |
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return AVERROR(ENOMEM); |
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} |
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av_frame_copy_props(out, in); |
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for (plane = 0; plane < s->nb_planes; plane++) { |
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const uint8_t *index = in->data[s->index]; |
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const uint8_t *src = in->data[plane]; |
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uint8_t *dst = out->data[plane]; |
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for (y = 0; y < s->height[plane]; y++) { |
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for (x = 0; x < s->width[plane]; x++) { |
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int v = s->lut[plane][index[x]]; |
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if (v >= 0 && v <= s->max) { |
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dst[x] = v; |
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} else { |
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dst[x] = src[x]; |
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} |
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} |
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index += in->linesize[s->index]; |
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src += in->linesize[plane]; |
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dst += out->linesize[plane]; |
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} |
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} |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
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static const AVFilterPad inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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.config_props = config_input, |
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}, |
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{ NULL } |
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}; |
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static const AVFilterPad outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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}, |
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{ NULL } |
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}; |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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PseudoColorContext *s = ctx->priv; |
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int i; |
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for (i = 0; i < 4; i++) { |
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av_expr_free(s->comp_expr[i]); |
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s->comp_expr[i] = NULL; |
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} |
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} |
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AVFILTER_DEFINE_CLASS(pseudocolor); |
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AVFilter ff_vf_pseudocolor = { |
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.name = "pseudocolor", |
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.description = NULL_IF_CONFIG_SMALL("Make pseudocolored video frames."), |
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.priv_size = sizeof(PseudoColorContext), |
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.priv_class = &pseudocolor_class, |
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.uninit = uninit, |
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.query_formats = query_formats, |
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.inputs = inputs, |
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.outputs = outputs, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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}; |
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