mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
9 years ago
parent
01aee8148d
commit
5d7743019b
6 changed files with 415 additions and 1 deletions
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/*
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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 "framesync.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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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_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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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 lut2_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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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, |
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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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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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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_framesync_get_frame(&s->fs, 0, &srcx, 0)) < 0 || |
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(ret = ff_framesync_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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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 p, ret; |
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s->depth = s->depthx + s->depthy; |
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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_framesync_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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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 ff_framesync_configure(&s->fs); |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *buf) |
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{ |
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LUT2Context *s = inlink->dst->priv; |
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return ff_framesync_filter_frame(&s->fs, inlink, buf); |
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} |
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static int request_frame(AVFilterLink *outlink) |
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{ |
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LUT2Context *s = outlink->src->priv; |
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return ff_framesync_request_frame(&s->fs, outlink); |
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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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.filter_frame = filter_frame, |
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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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.filter_frame = filter_frame, |
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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 = config_output, |
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.request_frame = request_frame, |
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}, |
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{ NULL } |
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}; |
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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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.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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