mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
4 years ago
parent
911ba8417e
commit
37f76c81d6
6 changed files with 361 additions and 1 deletions
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/*
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* Copyright (c) 2021 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/avstring.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/parseutils.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 "internal.h" |
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#include "video.h" |
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#include <float.h> |
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typedef struct ShearContext { |
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const AVClass *class; |
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float shx, shy; |
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int interp; |
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uint8_t fillcolor[4]; ///< color expressed either in YUVA or RGBA colorspace for the padding area
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char *fillcolor_str; |
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int fillcolor_enable; |
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int nb_planes; |
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int depth; |
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FFDrawContext draw; |
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FFDrawColor color; |
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int hsub, vsub; |
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int planewidth[4]; |
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int planeheight[4]; |
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int (*filter_slice[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); |
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} ShearContext; |
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typedef struct ThreadData { |
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AVFrame *in, *out; |
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} ThreadData; |
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#define OFFSET(x) offsetof(ShearContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption shear_options[] = { |
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{ "shx", "set x shear factor", OFFSET(shx), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -2, 2, .flags=FLAGS }, |
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{ "shy", "set y shear factor", OFFSET(shy), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -2, 2, .flags=FLAGS }, |
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{ "fillcolor", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS }, |
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{ "c", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS }, |
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{ "interp", "set interpolation", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags=FLAGS, "interp" }, |
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{ "nearest", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags=FLAGS, "interp" }, |
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{ "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags=FLAGS, "interp" }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(shear); |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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ShearContext *s = ctx->priv; |
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if (!strcmp(s->fillcolor_str, "none")) |
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s->fillcolor_enable = 0; |
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else if (av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) |
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s->fillcolor_enable = 1; |
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else |
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return AVERROR(EINVAL); |
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return 0; |
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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_GRAY8, AV_PIX_FMT_GRAY9, |
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AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, |
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AV_PIX_FMT_GRAY16, |
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, |
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUVJ411P, |
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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_YUV440P10, |
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12, |
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AV_PIX_FMT_YUV440P12, |
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AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14, |
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16, |
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
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AV_PIX_FMT_NONE |
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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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#define NN(type, name) \ |
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static int filter_slice_nn##name(AVFilterContext *ctx, void *arg, int jobnr, \
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int nb_jobs) \
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{ \
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ThreadData *td = arg; \
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AVFrame *in = td->in; \
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AVFrame *out = td->out; \
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ShearContext *s = ctx->priv; \
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const float shx = s->shx; \
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const float shy = s->shy; \
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\
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for (int p = 0; p < s->nb_planes; p++) { \
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const int hsub = (p == 1 || p == 2) ? s->hsub: 1; \
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const int vsub = (p == 1 || p == 2) ? s->vsub: 1; \
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const int width = s->planewidth[p]; \
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const int height = s->planeheight[p]; \
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const int wx = vsub * shx * height * 0.5f / hsub; \
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const int wy = hsub * shy * width * 0.5f / vsub; \
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const int slice_start = (height * jobnr) / nb_jobs; \
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const int slice_end = (height * (jobnr+1)) / nb_jobs; \
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const int src_linesize = in->linesize[p] / sizeof(type); \
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const int dst_linesize = out->linesize[p] / sizeof(type); \
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const type *src = (const type *)in->data[p]; \
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type *dst = (type *)out->data[p] + slice_start * dst_linesize; \
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\
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for (int y = slice_start; y < slice_end; y++) { \
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for (int x = 0; x < width; x++) { \
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int sx = x + vsub * shx * y / hsub - wx; \
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int sy = y + hsub * shy * x / vsub - wy; \
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\
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if (sx >= 0 && sx < width - 1 && \
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sy >= 0 && sy < height - 1) { \
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dst[x] = src[sy * src_linesize + sx]; \
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} \
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} \
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\
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dst += dst_linesize; \
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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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NN(uint8_t, 8) |
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NN(uint16_t, 16) |
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#define BL(type, name) \ |
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static int filter_slice_bl##name(AVFilterContext *ctx, void *arg, int jobnr, \
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int nb_jobs) \
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{ \
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ThreadData *td = arg; \
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AVFrame *in = td->in; \
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AVFrame *out = td->out; \
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ShearContext *s = ctx->priv; \
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const int depth = s->depth; \
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const float shx = s->shx; \
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const float shy = s->shy; \
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\
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for (int p = 0; p < s->nb_planes; p++) { \
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const int hsub = (p == 1 || p == 2) ? s->hsub: 1; \
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const int vsub = (p == 1 || p == 2) ? s->vsub: 1; \
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const int width = s->planewidth[p]; \
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const int height = s->planeheight[p]; \
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const float wx = vsub * shx * height * 0.5f / hsub; \
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const float wy = hsub * shy * width * 0.5f / vsub; \
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const int slice_start = (height * jobnr) / nb_jobs; \
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const int slice_end = (height * (jobnr+1)) / nb_jobs; \
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const int src_linesize = in->linesize[p] / sizeof(type); \
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const int dst_linesize = out->linesize[p] / sizeof(type); \
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const type *src = (const type *)in->data[p]; \
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type *dst = (type *)out->data[p] + slice_start * dst_linesize; \
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\
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for (int y = slice_start; y < slice_end; y++) { \
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for (int x = 0; x < width; x++) { \
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const float sx = x + vsub * shx * y / hsub - wx; \
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const float sy = y + hsub * shy * x / vsub - wy; \
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\
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if (sx >= 0 && sx < width - 1 && \
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sy >= 0 && sy < height - 1) { \
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float sum = 0.f; \
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int ax = floorf(sx); \
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int ay = floorf(sy); \
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float du = sx - ax; \
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float dv = sy - ay; \
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int bx = FFMIN(ax + 1, width - 1); \
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int by = FFMIN(ay + 1, height - 1); \
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\
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sum += (1.f - du) * (1.f - dv) * src[ay * src_linesize + ax];\
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sum += ( du) * (1.f - dv) * src[ay * src_linesize + bx];\
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sum += (1.f - du) * ( dv) * src[by * src_linesize + ax];\
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sum += ( du) * ( dv) * src[by * src_linesize + bx];\
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dst[x] = av_clip_uintp2_c(lrintf(sum), depth); \
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} \
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} \
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\
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dst += dst_linesize; \
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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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BL(uint8_t, 8) |
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BL(uint16_t, 16) |
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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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ShearContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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ThreadData td; |
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AVFrame *out; |
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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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/* fill background */ |
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if (s->fillcolor_enable) |
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ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize, |
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0, 0, outlink->w, outlink->h); |
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td.in = in, td.out = out; |
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ctx->internal->execute(ctx, s->filter_slice[s->interp], &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx))); |
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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 int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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ShearContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
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s->nb_planes = av_pix_fmt_count_planes(outlink->format); |
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s->depth = desc->comp[0].depth; |
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s->hsub = 1 << desc->log2_chroma_w; |
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s->vsub = 1 << desc->log2_chroma_h; |
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(ctx->inputs[0]->w, desc->log2_chroma_w); |
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s->planewidth[0] = s->planewidth[3] = ctx->inputs[0]->w; |
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(ctx->inputs[0]->h, desc->log2_chroma_h); |
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s->planeheight[0] = s->planeheight[3] = ctx->inputs[0]->h; |
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ff_draw_init(&s->draw, outlink->format, 0); |
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ff_draw_color(&s->draw, &s->color, s->fillcolor); |
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s->filter_slice[0] = s->depth <= 8 ? filter_slice_nn8 : filter_slice_nn16; |
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s->filter_slice[1] = s->depth <= 8 ? filter_slice_bl8 : filter_slice_bl16; |
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return 0; |
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} |
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static int process_command(AVFilterContext *ctx, |
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const char *cmd, |
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const char *arg, |
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char *res, |
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int res_len, |
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int flags) |
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{ |
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ShearContext *s = ctx->priv; |
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int ret; |
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ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags); |
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if (ret < 0) |
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return ret; |
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ret = init(ctx); |
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if (ret < 0) |
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return ret; |
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ff_draw_color(&s->draw, &s->color, s->fillcolor); |
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return 0; |
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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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}, |
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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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}, |
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{ NULL } |
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}; |
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AVFilter ff_vf_shear = { |
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.name = "shear", |
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.description = NULL_IF_CONFIG_SMALL("Shear transform the input image."), |
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.priv_size = sizeof(ShearContext), |
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.init = init, |
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.query_formats = query_formats, |
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.inputs = inputs, |
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.outputs = outputs, |
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.priv_class = &shear_class, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
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.process_command = process_command, |
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}; |
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