git.sesse.net Git - ffmpeg/blob - libavfilter/vf_lagfun.c

   1 /*
   2  * Copyright (c) 2019 Paul B Mahol
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "libavutil/imgutils.h"
  22 #include "libavutil/intreadwrite.h"
  23 #include "libavutil/opt.h"
  24 #include "libavutil/pixdesc.h"
  25
  26 #include "avfilter.h"
  27 #include "formats.h"
  28 #include "internal.h"
  29 #include "video.h"
  30
  31 typedef struct LagfunContext {
  32     const AVClass *class;
  33     float decay;
  34     int planes;
  35
  36     int depth;
  37     int nb_planes;
  38     int linesize[4];
  39     int planewidth[4];
  40     int planeheight[4];
  41
  42     float *old[4];
  43
  44     int (*lagfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
  45 } LagfunContext;
  46
  47 static int query_formats(AVFilterContext *ctx)
  48 {
  49     static const enum AVPixelFormat pixel_fmts[] = {
  50         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
  51         AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
  52         AV_PIX_FMT_GRAY16,
  53         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
  54         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
  55         AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
  56         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
  57         AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
  58         AV_PIX_FMT_YUVJ411P,
  59         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
  60         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
  61         AV_PIX_FMT_YUV440P10,
  62         AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
  63         AV_PIX_FMT_YUV440P12,
  64         AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
  65         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
  66         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
  67         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
  68         AV_PIX_FMT_NONE
  69     };
  70     AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
  71     if (!formats)
  72         return AVERROR(ENOMEM);
  73     return ff_set_common_formats(ctx, formats);
  74 }
  75
  76 typedef struct ThreadData {
  77     AVFrame *in, *out;
  78 } ThreadData;
  79
  80 #define LAGFUN(name, type)                                                \
  81 static int lagfun_frame##name(AVFilterContext *ctx, void *arg,            \
  82                               int jobnr, int nb_jobs)                     \
  83 {                                                                         \
  84     LagfunContext *s = ctx->priv;                                         \
  85     const float decay = s->decay;                                         \
  86     ThreadData *td = arg;                                                 \
  87     AVFrame *in = td->in;                                                 \
  88     AVFrame *out = td->out;                                               \
  89                                                                           \
  90     for (int p = 0; p < s->nb_planes; p++) {                              \
  91         const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;    \
  92         const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;  \
  93         const type *src = (const type *)in->data[p] +                     \
  94                           slice_start * in->linesize[p] / sizeof(type);   \
  95         float *osrc = s->old[p] + slice_start * s->planewidth[p];         \
  96         type *dst = (type *)out->data[p] +                                \
  97                     slice_start * out->linesize[p] / sizeof(type);        \
  98                                                                           \
  99         if (!((1 << p) & s->planes)) {                                    \
 100             av_image_copy_plane((uint8_t *)dst, out->linesize[p],         \
 101                                 (const uint8_t *)src, in->linesize[p],    \
 102                                 s->linesize[p], slice_end - slice_start); \
 103             continue;                                                     \
 104         }                                                                 \
 105                                                                           \
 106         for (int y = slice_start; y < slice_end; y++) {                   \
 107             for (int x = 0; x < s->planewidth[p]; x++) {                  \
 108                 float v = FFMAX(src[x], osrc[x] * decay);                 \
 109                                                                           \
 110                 osrc[x] = v;                                              \
 111                 if (ctx->is_disabled) {                                   \
 112                     dst[x] = src[x];                                      \
 113                 } else {                                                  \
 114                     dst[x] = lrintf(v);                                   \
 115                 }                                                         \
 116             }                                                             \
 117                                                                           \
 118             src += in->linesize[p] / sizeof(type);                        \
 119             osrc += s->planewidth[p];                                     \
 120             dst += out->linesize[p] / sizeof(type);                       \
 121         }                                                                 \
 122     }                                                                     \
 123                                                                           \
 124     return 0;                                                             \
 125 }
 126
 127 LAGFUN(8, uint8_t)
 128 LAGFUN(16, uint16_t)
 129
 130 static int config_output(AVFilterLink *outlink)
 131 {
 132     AVFilterContext *ctx = outlink->src;
 133     LagfunContext *s = ctx->priv;
 134     AVFilterLink *inlink = ctx->inputs[0];
 135     const AVPixFmtDescriptor *desc;
 136     int ret;
 137
 138     desc = av_pix_fmt_desc_get(outlink->format);
 139     if (!desc)
 140         return AVERROR_BUG;
 141     s->nb_planes = av_pix_fmt_count_planes(outlink->format);
 142     s->depth = desc->comp[0].depth;
 143     s->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;
 144
 145     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
 146         return ret;
 147
 148     s->planewidth[1]  = s->planewidth[2]  = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
 149     s->planewidth[0]  = s->planewidth[3]  = inlink->w;
 150     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
 151     s->planeheight[0] = s->planeheight[3] = inlink->h;
 152
 153     for (int p = 0; p < s->nb_planes; p++) {
 154         s->old[p] = av_calloc(s->planewidth[p] * s->planeheight[p], sizeof(*s->old[0]));
 155         if (!s->old[p])
 156             return AVERROR(ENOMEM);
 157     }
 158
 159     return 0;
 160 }
 161
 162 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 163 {
 164     AVFilterContext *ctx = inlink->dst;
 165     AVFilterLink *outlink = ctx->outputs[0];
 166     LagfunContext *s = ctx->priv;
 167     ThreadData td;
 168     AVFrame *out;
 169
 170     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 171     if (!out) {
 172         av_frame_free(&in);
 173         return AVERROR(ENOMEM);
 174     }
 175     out->pts = in->pts;
 176
 177     td.out = out;
 178     td.in = in;
 179     ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
 180
 181     av_frame_free(&in);
 182     return ff_filter_frame(outlink, out);
 183 }
 184
 185 static av_cold void uninit(AVFilterContext *ctx)
 186 {
 187     LagfunContext *s = ctx->priv;
 188
 189     for (int p = 0; p < s->nb_planes; p++)
 190         av_freep(&s->old[p]);
 191 }
 192
 193 #define OFFSET(x) offsetof(LagfunContext, x)
 194 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
 195
 196 static const AVOption lagfun_options[] = {
 197     { "decay",  "set decay",                 OFFSET(decay),  AV_OPT_TYPE_FLOAT, {.dbl=.95},  0,  1,  FLAGS },
 198     { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15},   0, 15,  FLAGS },
 199     { NULL },
 200 };
 201
 202 static const AVFilterPad inputs[] = {
 203     {
 204         .name          = "default",
 205         .type          = AVMEDIA_TYPE_VIDEO,
 206         .filter_frame  = filter_frame,
 207     },
 208     { NULL }
 209 };
 210
 211 static const AVFilterPad outputs[] = {
 212     {
 213         .name          = "default",
 214         .type          = AVMEDIA_TYPE_VIDEO,
 215         .config_props  = config_output,
 216     },
 217     { NULL }
 218 };
 219
 220 AVFILTER_DEFINE_CLASS(lagfun);
 221
 222 const AVFilter ff_vf_lagfun = {
 223     .name          = "lagfun",
 224     .description   = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
 225     .priv_size     = sizeof(LagfunContext),
 226     .priv_class    = &lagfun_class,
 227     .query_formats = query_formats,
 228     .uninit        = uninit,
 229     .outputs       = outputs,
 230     .inputs        = inputs,
 231     .flags         = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
 232     .process_command = ff_filter_process_command,
 233 };