mirror of https://git.ffmpeg.org/ffmpeg.git
465 lines
14 KiB
C
465 lines
14 KiB
C
/*
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* Copyright (c) 2016 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/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "drawutils.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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#include "framesync2.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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"x", ///< input value for the pixel from input #1
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"y", ///< input value for the pixel from input #2
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"bdx", ///< input #1 video bitdepth
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"bdy", ///< input #2 video bitdepth
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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_X,
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VAR_Y,
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VAR_BITDEPTHX,
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VAR_BITDEPTHY,
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VAR_VARS_NB
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};
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typedef struct LUT2Context {
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const AVClass *class;
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char *comp_expr_str[4];
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AVExpr *comp_expr[4];
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double var_values[VAR_VARS_NB];
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uint16_t *lut[4]; ///< lookup table for each component
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int width[4], height[4];
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int nb_planes;
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int depth, depthx, depthy;
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int tlut2;
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AVFrame *prev_frame; /* only used with tlut2 */
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void (*lut2)(struct LUT2Context *s, AVFrame *dst, AVFrame *srcx, AVFrame *srcy);
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FFFrameSync fs;
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} LUT2Context;
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#define OFFSET(x) offsetof(LUT2Context, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
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{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
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{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
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{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, { .str = "x" }, .flags = FLAGS },
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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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LUT2Context *s = ctx->priv;
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int i;
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av_frame_free(&s->prev_frame);
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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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av_freep(&s->comp_expr_str[i]);
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av_freep(&s->lut[i]);
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}
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP12,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12,
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AV_PIX_FMT_NONE
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};
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return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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}
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static int config_inputx(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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LUT2Context *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int hsub = desc->log2_chroma_w;
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int vsub = desc->log2_chroma_h;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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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->depthx = desc->comp[0].depth;
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s->var_values[VAR_BITDEPTHX] = s->depthx;
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if (s->tlut2) {
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s->depthy = desc->comp[0].depth;
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s->var_values[VAR_BITDEPTHY] = s->depthy;
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}
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return 0;
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}
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static int config_inputy(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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LUT2Context *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->depthy = desc->comp[0].depth;
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s->var_values[VAR_BITDEPTHY] = s->depthy;
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return 0;
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}
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static void lut2_8bit(struct LUT2Context *s, AVFrame *out, AVFrame *srcx, AVFrame *srcy)
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{
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int p, y, x;
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for (p = 0; p < s->nb_planes; p++) {
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const uint16_t *lut = s->lut[p];
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const uint8_t *srcxx, *srcyy;
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uint8_t *dst;
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dst = out->data[p];
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srcxx = srcx->data[p];
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srcyy = srcy->data[p];
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for (y = 0; y < s->height[p]; y++) {
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for (x = 0; x < s->width[p]; x++) {
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dst[x] = lut[(srcyy[x] << s->depthx) | srcxx[x]];
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}
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dst += out->linesize[p];
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srcxx += srcx->linesize[p];
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srcyy += srcy->linesize[p];
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}
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}
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}
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static void lut2_16bit(struct LUT2Context *s, AVFrame *out, AVFrame *srcx, AVFrame *srcy)
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{
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int p, y, x;
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for (p = 0; p < s->nb_planes; p++) {
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const uint16_t *lut = s->lut[p];
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const uint16_t *srcxx, *srcyy;
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uint16_t *dst;
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dst = (uint16_t *)out->data[p];
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srcxx = (uint16_t *)srcx->data[p];
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srcyy = (uint16_t *)srcy->data[p];
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for (y = 0; y < s->height[p]; y++) {
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for (x = 0; x < s->width[p]; x++) {
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dst[x] = lut[(srcyy[x] << s->depthx) | srcxx[x]];
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}
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dst += out->linesize[p] / 2;
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srcxx += srcx->linesize[p] / 2;
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srcyy += srcy->linesize[p] / 2;
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}
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}
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}
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static int process_frame(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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LUT2Context *s = fs->opaque;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out, *srcx, *srcy;
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int ret;
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if ((ret = ff_framesync2_get_frame(&s->fs, 0, &srcx, 0)) < 0 ||
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(ret = ff_framesync2_get_frame(&s->fs, 1, &srcy, 0)) < 0)
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return ret;
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if (ctx->is_disabled) {
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out = av_frame_clone(srcx);
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if (!out)
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return AVERROR(ENOMEM);
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} else {
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out)
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return AVERROR(ENOMEM);
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av_frame_copy_props(out, srcx);
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s->lut2(s, out, srcx, srcy);
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}
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out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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return ff_filter_frame(outlink, out);
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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LUT2Context *s = ctx->priv;
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int p, ret;
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s->depth = s->depthx + s->depthy;
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s->lut2 = s->depth > 16 ? lut2_16bit : lut2_8bit;
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for (p = 0; p < s->nb_planes; p++) {
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s->lut[p] = av_malloc_array(1 << s->depth, sizeof(uint16_t));
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if (!s->lut[p])
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return AVERROR(ENOMEM);
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}
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for (p = 0; p < s->nb_planes; p++) {
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double res;
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int x, y;
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/* create the parsed expression */
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av_expr_free(s->comp_expr[p]);
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s->comp_expr[p] = NULL;
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ret = av_expr_parse(&s->comp_expr[p], s->comp_expr_str[p],
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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.\n",
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s->comp_expr_str[p], p);
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return AVERROR(EINVAL);
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}
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/* compute the lut */
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for (y = 0; y < (1 << s->depthx); y++) {
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s->var_values[VAR_Y] = y;
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for (x = 0; x < (1 << s->depthx); x++) {
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s->var_values[VAR_X] = x;
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res = av_expr_eval(s->comp_expr[p], 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 values %d and %d for the component %d.\n",
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s->comp_expr_str[p], x, y, p);
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return AVERROR(EINVAL);
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}
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s->lut[p][(y << s->depthx) + x] = res;
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}
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}
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}
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return 0;
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}
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static int lut2_config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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LUT2Context *s = ctx->priv;
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AVFilterLink *srcx = ctx->inputs[0];
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AVFilterLink *srcy = ctx->inputs[1];
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FFFrameSyncIn *in;
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int ret;
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if (srcx->format != srcy->format) {
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av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
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return AVERROR(EINVAL);
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}
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if (srcx->w != srcy->w ||
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srcx->h != srcy->h ||
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srcx->sample_aspect_ratio.num != srcy->sample_aspect_ratio.num ||
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srcx->sample_aspect_ratio.den != srcy->sample_aspect_ratio.den) {
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av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
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"(size %dx%d, SAR %d:%d) do not match the corresponding "
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"second input link %s parameters (%dx%d, SAR %d:%d)\n",
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ctx->input_pads[0].name, srcx->w, srcx->h,
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srcx->sample_aspect_ratio.num,
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srcx->sample_aspect_ratio.den,
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ctx->input_pads[1].name,
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srcy->w, srcy->h,
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srcy->sample_aspect_ratio.num,
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srcy->sample_aspect_ratio.den);
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return AVERROR(EINVAL);
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}
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outlink->w = srcx->w;
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outlink->h = srcx->h;
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outlink->time_base = srcx->time_base;
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outlink->sample_aspect_ratio = srcx->sample_aspect_ratio;
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outlink->frame_rate = srcx->frame_rate;
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if ((ret = ff_framesync2_init(&s->fs, ctx, 2)) < 0)
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return ret;
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in = s->fs.in;
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in[0].time_base = srcx->time_base;
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in[1].time_base = srcy->time_base;
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in[0].sync = 1;
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in[0].before = EXT_STOP;
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in[0].after = EXT_INFINITY;
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in[1].sync = 1;
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in[1].before = EXT_STOP;
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in[1].after = EXT_INFINITY;
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s->fs.opaque = s;
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s->fs.on_event = process_frame;
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if ((ret = config_output(outlink)) < 0)
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return ret;
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return ff_framesync2_configure(&s->fs);
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}
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static int activate(AVFilterContext *ctx)
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{
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LUT2Context *s = ctx->priv;
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return ff_framesync2_activate(&s->fs);
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "srcx",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_inputx,
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},
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{
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.name = "srcy",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_inputy,
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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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.config_props = lut2_config_output,
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},
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{ NULL }
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};
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#define lut2_options options
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AVFILTER_DEFINE_CLASS(lut2);
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AVFilter ff_vf_lut2 = {
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.name = "lut2",
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.description = NULL_IF_CONFIG_SMALL("Compute and apply a lookup table from two video inputs."),
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.priv_size = sizeof(LUT2Context),
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.priv_class = &lut2_class,
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.uninit = uninit,
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.query_formats = query_formats,
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.activate = activate,
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.inputs = inputs,
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.outputs = outputs,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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};
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#if CONFIG_TLUT2_FILTER
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static av_cold int init(AVFilterContext *ctx)
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{
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LUT2Context *s = ctx->priv;
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s->tlut2 = !strcmp(ctx->filter->name, "tlut2");
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return 0;
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}
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static int tlut2_filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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LUT2Context *s = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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if (s->prev_frame) {
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AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&s->prev_frame);
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s->prev_frame = frame;
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, frame);
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s->lut2(s, out, frame, s->prev_frame);
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av_frame_free(&s->prev_frame);
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s->prev_frame = frame;
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return ff_filter_frame(outlink, out);
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}
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s->prev_frame = frame;
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return 0;
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}
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#define tlut2_options options
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AVFILTER_DEFINE_CLASS(tlut2);
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static const AVFilterPad tlut2_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 = tlut2_filter_frame,
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.config_props = config_inputx,
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},
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{ NULL }
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};
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static const AVFilterPad tlut2_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_vf_tlut2 = {
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.name = "tlut2",
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.description = NULL_IF_CONFIG_SMALL("Compute and apply a lookup table from two successive frames."),
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.priv_size = sizeof(LUT2Context),
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.priv_class = &tlut2_class,
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.query_formats = query_formats,
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.init = init,
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.uninit = uninit,
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.inputs = tlut2_inputs,
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.outputs = tlut2_outputs,
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};
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#endif
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