mirror of https://github.com/FFmpeg/FFmpeg.git
F.Sluiter
9 years ago
committed by
Paul B Mahol
parent
c169062073
commit
3a9611d623
6 changed files with 354 additions and 2 deletions
@ -0,0 +1,337 @@ |
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/*
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* Copyright (c) 2016 Floris Sluiter |
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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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* Pixel remap filter |
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* This filter copies pixel by pixel a source frame to a target frame. |
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* It remaps the pixels to a new x,y destination based on two files ymap/xmap. |
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* Map files are passed as a parameter and are in PGM format (P2 or P5), |
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* where the values are y(rows)/x(cols) coordinates of the source_frame. |
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* The *target* frame dimension is based on mapfile dimensions: specified in the |
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* header of the mapfile and reflected in the number of datavalues. |
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* Dimensions of ymap and xmap must be equal. Datavalues must be positive or zero. |
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* Any datavalue in the ymap or xmap which value is higher |
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* then the *source* frame height or width is silently ignored, leaving a |
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* blank/chromakey pixel. This can safely be used as a feature to create overlays. |
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* |
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* Algorithm digest: |
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* Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ]; |
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*/ |
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#include "libavutil/imgutils.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/opt.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "framesync.h" |
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#include "internal.h" |
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#include "video.h" |
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typedef struct RemapContext { |
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const AVClass *class; |
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int nb_planes; |
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int nb_components; |
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int step; |
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FFFrameSync fs; |
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void (*remap)(struct RemapContext *s, const AVFrame *in, |
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const AVFrame *xin, const AVFrame *yin, |
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AVFrame *out); |
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} RemapContext; |
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#define OFFSET(x) offsetof(RemapContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption remap_options[] = { |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(remap); |
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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, |
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AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
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AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, |
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AV_PIX_FMT_NONE |
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}; |
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static const enum AVPixelFormat map_fmts[] = { |
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AV_PIX_FMT_GRAY16, |
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AV_PIX_FMT_NONE |
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}; |
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AVFilterFormats *pix_formats = NULL, *map_formats = NULL; |
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int ret; |
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if (!(pix_formats = ff_make_format_list(pix_fmts)) || |
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!(map_formats = ff_make_format_list(map_fmts))) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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if ((ret = ff_formats_ref(pix_formats, &ctx->inputs[0]->out_formats)) < 0 || |
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(ret = ff_formats_ref(map_formats, &ctx->inputs[1]->out_formats)) < 0 || |
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(ret = ff_formats_ref(map_formats, &ctx->inputs[2]->out_formats)) < 0 || |
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(ret = ff_formats_ref(pix_formats, &ctx->outputs[0]->in_formats)) < 0) |
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goto fail; |
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return 0; |
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fail: |
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if (pix_formats) |
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av_freep(&pix_formats->formats); |
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av_freep(&pix_formats); |
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if (map_formats) |
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av_freep(&map_formats->formats); |
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av_freep(&map_formats); |
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return ret; |
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} |
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/**
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* remap_planar algorithm expects planes of same size |
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* pixels are copied from source to target using : |
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* Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ]; |
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*/ |
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static void remap_planar(RemapContext *s, const AVFrame *in, |
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const AVFrame *xin, const AVFrame *yin, |
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AVFrame *out) |
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{ |
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const int xlinesize = xin->linesize[0] / 2; |
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const int ylinesize = yin->linesize[0] / 2; |
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int x , y, plane; |
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for (plane = 0; plane < s->nb_planes ; plane++) { |
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uint8_t *dst = out->data[plane]; |
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const int dlinesize = out->linesize[plane]; |
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const uint8_t *src = in->data[plane]; |
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const int slinesize = in->linesize[plane]; |
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const uint16_t *xmap = (const uint16_t *)xin->data[0]; |
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const uint16_t *ymap = (const uint16_t *)yin->data[0]; |
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for (y = 0; y < out->height; y++) { |
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for (x = 0; x < out->width; x++) { |
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if (ymap[x] < in->height && xmap[x] < in->width) { |
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dst[x] = src[ymap[x] * slinesize + xmap[x]]; |
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} else { |
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dst[x] = 0; |
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} |
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} |
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dst += dlinesize; |
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xmap += xlinesize; |
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ymap += ylinesize; |
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} |
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} |
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} |
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/**
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* remap_packed algorithm expects pixels with both padded bits (step) and |
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* number of components correctly set. |
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* pixels are copied from source to target using : |
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* Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ]; |
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*/ |
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static void remap_packed(RemapContext *s, const AVFrame *in, |
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const AVFrame *xin, const AVFrame *yin, |
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AVFrame *out) |
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{ |
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uint8_t *dst = out->data[0]; |
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const uint8_t *src = in->data[0]; |
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const int dlinesize = out->linesize[0]; |
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const int slinesize = in->linesize[0]; |
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const int xlinesize = xin->linesize[0] / 2; |
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const int ylinesize = yin->linesize[0] / 2; |
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const uint16_t *xmap = (const uint16_t *)xin->data[0]; |
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const uint16_t *ymap = (const uint16_t *)yin->data[0]; |
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const int step = s->step; |
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int c, x, y; |
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for (y = 0; y < out->height; y++) { |
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for (x = 0; x < out->width; x++) { |
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for (c = 0; c < s->nb_components; c++) { |
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if (ymap[x] < in->height && xmap[x] < in->width) { |
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dst[x * step + c] = src[ymap[x] * slinesize + xmap[x] * step + c]; |
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} else { |
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dst[x * step + c] = 0; |
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} |
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} |
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} |
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dst += dlinesize; |
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xmap += xlinesize; |
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ymap += ylinesize; |
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} |
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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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RemapContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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s->nb_components = desc->nb_components; |
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if (s->nb_planes > 1 || s->nb_components == 1) { |
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s->remap = remap_planar; |
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} else { |
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s->remap = remap_packed; |
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} |
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s->step = av_get_padded_bits_per_pixel(desc) >> 3; |
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return 0; |
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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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RemapContext *s = fs->opaque; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AVFrame *out, *in, *xpic, *ypic; |
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int ret; |
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if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 || |
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(ret = ff_framesync_get_frame(&s->fs, 1, &xpic, 0)) < 0 || |
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(ret = ff_framesync_get_frame(&s->fs, 2, &ypic, 0)) < 0) |
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return ret; |
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if (ctx->is_disabled) { |
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out = av_frame_clone(in); |
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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, in); |
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s->remap(s, in, xpic, ypic, out); |
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} |
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out->pts = av_rescale_q(in->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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RemapContext *s = ctx->priv; |
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AVFilterLink *srclink = ctx->inputs[0]; |
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AVFilterLink *xlink = ctx->inputs[1]; |
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AVFilterLink *ylink = ctx->inputs[2]; |
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FFFrameSyncIn *in; |
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int ret; |
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if (xlink->w != ylink->w || xlink->h != ylink->h) { |
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av_log(ctx, AV_LOG_ERROR, "Second input link %s parameters " |
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"(size %dx%d) do not match the corresponding " |
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"third input link %s parameters (%dx%d)\n", |
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ctx->input_pads[1].name, xlink->w, xlink->h, |
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ctx->input_pads[2].name, ylink->w, ylink->h); |
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return AVERROR(EINVAL); |
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} |
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outlink->w = xlink->w; |
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outlink->h = xlink->h; |
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outlink->time_base = srclink->time_base; |
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outlink->sample_aspect_ratio = srclink->sample_aspect_ratio; |
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outlink->frame_rate = srclink->frame_rate; |
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ret = ff_framesync_init(&s->fs, ctx, 3); |
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if (ret < 0) |
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return ret; |
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in = s->fs.in; |
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in[0].time_base = srclink->time_base; |
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in[1].time_base = xlink->time_base; |
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in[2].time_base = ylink->time_base; |
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in[0].sync = 2; |
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in[0].before = EXT_STOP; |
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in[0].after = EXT_STOP; |
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in[1].sync = 1; |
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in[1].before = EXT_NULL; |
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in[1].after = EXT_INFINITY; |
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in[2].sync = 1; |
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in[2].before = EXT_NULL; |
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in[2].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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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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RemapContext *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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RemapContext *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 av_cold void uninit(AVFilterContext *ctx) |
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{ |
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RemapContext *s = ctx->priv; |
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ff_framesync_uninit(&s->fs); |
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} |
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static const AVFilterPad remap_inputs[] = { |
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{ |
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.name = "source", |
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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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{ |
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.name = "xmap", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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}, |
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{ |
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.name = "ymap", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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}, |
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{ NULL } |
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}; |
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static const AVFilterPad remap_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 ff_vf_remap = { |
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.name = "remap", |
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.description = NULL_IF_CONFIG_SMALL("Remap pixels"), |
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.priv_size = sizeof(RemapContext), |
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.uninit = uninit, |
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.query_formats = query_formats, |
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.inputs = remap_inputs, |
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.outputs = remap_outputs, |
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.priv_class = &remap_class, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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}; |
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