LCOV - code coverage report
Current view: top level - libavfilter - vf_unsharp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 101 115 87.8 %
Date: 2017-12-18 06:23:41 Functions: 10 10 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com>
       3             :  * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org>
       4             :  * Relicensed to the LGPL with permission from Remi Guyomarch.
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : /**
      24             :  * @file
      25             :  * blur / sharpen filter, ported to FFmpeg from MPlayer
      26             :  * libmpcodecs/unsharp.c.
      27             :  *
      28             :  * This code is based on:
      29             :  *
      30             :  * An Efficient algorithm for Gaussian blur using finite-state machines
      31             :  * Frederick M. Waltz and John W. V. Miller
      32             :  *
      33             :  * SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII
      34             :  * Originally published Boston, Nov 98
      35             :  *
      36             :  * http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf
      37             :  */
      38             : 
      39             : #include "avfilter.h"
      40             : #include "formats.h"
      41             : #include "internal.h"
      42             : #include "video.h"
      43             : #include "libavutil/common.h"
      44             : #include "libavutil/imgutils.h"
      45             : #include "libavutil/mem.h"
      46             : #include "libavutil/opt.h"
      47             : #include "libavutil/pixdesc.h"
      48             : #include "unsharp.h"
      49             : 
      50         150 : static void apply_unsharp(      uint8_t *dst, int dst_stride,
      51             :                           const uint8_t *src, int src_stride,
      52             :                           int width, int height, UnsharpFilterParam *fp)
      53             : {
      54         150 :     uint32_t **sc = fp->sc;
      55             :     uint32_t sr[MAX_MATRIX_SIZE - 1], tmp1, tmp2;
      56             : 
      57             :     int32_t res;
      58             :     int x, y, z;
      59         150 :     const uint8_t *src2 = NULL;  //silence a warning
      60         150 :     const int amount = fp->amount;
      61         150 :     const int steps_x = fp->steps_x;
      62         150 :     const int steps_y = fp->steps_y;
      63         150 :     const int scalebits = fp->scalebits;
      64         150 :     const int32_t halfscale = fp->halfscale;
      65             : 
      66         150 :     if (!amount) {
      67           0 :         av_image_copy_plane(dst, dst_stride, src, src_stride, width, height);
      68           0 :         return;
      69             :     }
      70             : 
      71        1650 :     for (y = 0; y < 2 * steps_y; y++)
      72        1500 :         memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x));
      73             : 
      74       30450 :     for (y = -steps_y; y < height + steps_y; y++) {
      75       30300 :         if (y < height)
      76       29550 :             src2 = src;
      77             : 
      78       30300 :         memset(sr, 0, sizeof(sr[0]) * (2 * steps_x - 1));
      79     8288500 :         for (x = -steps_x; x < width + steps_x; x++) {
      80     8258200 :             tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x];
      81    49549200 :             for (z = 0; z < steps_x * 2; z += 2) {
      82    41291000 :                 tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1;
      83    41291000 :                 tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2;
      84             :             }
      85    49549200 :             for (z = 0; z < steps_y * 2; z += 2) {
      86    41291000 :                 tmp2 = sc[z + 0][x + steps_x] + tmp1; sc[z + 0][x + steps_x] = tmp1;
      87    41291000 :                 tmp1 = sc[z + 1][x + steps_x] + tmp2; sc[z + 1][x + steps_x] = tmp2;
      88             :             }
      89     8258200 :             if (x >= steps_x && y >= steps_y) {
      90     7603200 :                 const uint8_t *srx = src - steps_y * src_stride + x - steps_x;
      91     7603200 :                 uint8_t *dsx       = dst - steps_y * dst_stride + x - steps_x;
      92             : 
      93     7603200 :                 res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> 16);
      94     7603200 :                 *dsx = av_clip_uint8(res);
      95             :             }
      96             :         }
      97       30300 :         if (y >= 0) {
      98       29550 :             dst += dst_stride;
      99       29550 :             src += src_stride;
     100             :         }
     101             :     }
     102             : }
     103             : 
     104          50 : static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
     105             : {
     106          50 :     AVFilterLink *inlink = ctx->inputs[0];
     107          50 :     UnsharpContext *s = ctx->priv;
     108             :     int i, plane_w[3], plane_h[3];
     109             :     UnsharpFilterParam *fp[3];
     110          50 :     plane_w[0] = inlink->w;
     111          50 :     plane_w[1] = plane_w[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub);
     112          50 :     plane_h[0] = inlink->h;
     113          50 :     plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub);
     114          50 :     fp[0] = &s->luma;
     115          50 :     fp[1] = fp[2] = &s->chroma;
     116         200 :     for (i = 0; i < 3; i++) {
     117         150 :         apply_unsharp(out->data[i], out->linesize[i], in->data[i], in->linesize[i], plane_w[i], plane_h[i], fp[i]);
     118             :     }
     119          50 :     return 0;
     120             : }
     121             : 
     122           2 : static void set_filter_param(UnsharpFilterParam *fp, int msize_x, int msize_y, float amount)
     123             : {
     124           2 :     fp->msize_x = msize_x;
     125           2 :     fp->msize_y = msize_y;
     126           2 :     fp->amount = amount * 65536.0;
     127             : 
     128           2 :     fp->steps_x = msize_x / 2;
     129           2 :     fp->steps_y = msize_y / 2;
     130           2 :     fp->scalebits = (fp->steps_x + fp->steps_y) * 2;
     131           2 :     fp->halfscale = 1 << (fp->scalebits - 1);
     132           2 : }
     133             : 
     134           1 : static av_cold int init(AVFilterContext *ctx)
     135             : {
     136           1 :     UnsharpContext *s = ctx->priv;
     137             : 
     138           1 :     set_filter_param(&s->luma,   s->lmsize_x, s->lmsize_y, s->lamount);
     139           1 :     set_filter_param(&s->chroma, s->cmsize_x, s->cmsize_y, s->camount);
     140             : 
     141           1 :     if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26) {
     142           0 :         av_log(ctx, AV_LOG_ERROR, "luma or chroma matrix size too big\n");
     143           0 :         return AVERROR(EINVAL);
     144             :     }
     145           1 :     s->apply_unsharp = apply_unsharp_c;
     146           1 :     return 0;
     147             : }
     148             : 
     149           1 : static int query_formats(AVFilterContext *ctx)
     150             : {
     151             :     static const enum AVPixelFormat pix_fmts[] = {
     152             :         AV_PIX_FMT_YUV420P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV410P,
     153             :         AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV440P,  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
     154             :         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE
     155             :     };
     156             : 
     157           1 :     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     158           1 :     if (!fmts_list)
     159           0 :         return AVERROR(ENOMEM);
     160           1 :     return ff_set_common_formats(ctx, fmts_list);
     161             : }
     162             : 
     163           2 : static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width)
     164             : {
     165             :     int z;
     166           2 :     const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen";
     167             : 
     168           2 :     if  (!(fp->msize_x & fp->msize_y & 1)) {
     169           0 :         av_log(ctx, AV_LOG_ERROR,
     170             :                "Invalid even size for %s matrix size %dx%d\n",
     171             :                effect_type, fp->msize_x, fp->msize_y);
     172           0 :         return AVERROR(EINVAL);
     173             :     }
     174             : 
     175           2 :     av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n",
     176           2 :            effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0);
     177             : 
     178          22 :     for (z = 0; z < 2 * fp->steps_y; z++)
     179          20 :         if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x,
     180             :                                           sizeof(*(fp->sc[z])))))
     181           0 :             return AVERROR(ENOMEM);
     182             : 
     183           2 :     return 0;
     184             : }
     185             : 
     186           1 : static int config_props(AVFilterLink *link)
     187             : {
     188           1 :     UnsharpContext *s = link->dst->priv;
     189           1 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
     190             :     int ret;
     191             : 
     192           1 :     s->hsub = desc->log2_chroma_w;
     193           1 :     s->vsub = desc->log2_chroma_h;
     194             : 
     195           1 :     ret = init_filter_param(link->dst, &s->luma,   "luma",   link->w);
     196           1 :     if (ret < 0)
     197           0 :         return ret;
     198           1 :     ret = init_filter_param(link->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(link->w, s->hsub));
     199           1 :     if (ret < 0)
     200           0 :         return ret;
     201             : 
     202           1 :     return 0;
     203             : }
     204             : 
     205           2 : static void free_filter_param(UnsharpFilterParam *fp)
     206             : {
     207             :     int z;
     208             : 
     209          22 :     for (z = 0; z < 2 * fp->steps_y; z++)
     210          20 :         av_freep(&fp->sc[z]);
     211           2 : }
     212             : 
     213           1 : static av_cold void uninit(AVFilterContext *ctx)
     214             : {
     215           1 :     UnsharpContext *s = ctx->priv;
     216             : 
     217           1 :     free_filter_param(&s->luma);
     218           1 :     free_filter_param(&s->chroma);
     219           1 : }
     220             : 
     221          50 : static int filter_frame(AVFilterLink *link, AVFrame *in)
     222             : {
     223          50 :     UnsharpContext *s = link->dst->priv;
     224          50 :     AVFilterLink *outlink   = link->dst->outputs[0];
     225             :     AVFrame *out;
     226          50 :     int ret = 0;
     227             : 
     228          50 :     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     229          50 :     if (!out) {
     230           0 :         av_frame_free(&in);
     231           0 :         return AVERROR(ENOMEM);
     232             :     }
     233          50 :     av_frame_copy_props(out, in);
     234             : 
     235          50 :     ret = s->apply_unsharp(link->dst, in, out);
     236             : 
     237          50 :     av_frame_free(&in);
     238             : 
     239          50 :     if (ret < 0) {
     240           0 :         av_frame_free(&out);
     241           0 :         return ret;
     242             :     }
     243          50 :     return ff_filter_frame(outlink, out);
     244             : }
     245             : 
     246             : #define OFFSET(x) offsetof(UnsharpContext, x)
     247             : #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
     248             : #define MIN_SIZE 3
     249             : #define MAX_SIZE 23
     250             : static const AVOption unsharp_options[] = {
     251             :     { "luma_msize_x",   "set luma matrix horizontal size",   OFFSET(lmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     252             :     { "lx",             "set luma matrix horizontal size",   OFFSET(lmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     253             :     { "luma_msize_y",   "set luma matrix vertical size",     OFFSET(lmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     254             :     { "ly",             "set luma matrix vertical size",     OFFSET(lmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     255             :     { "luma_amount",    "set luma effect strength",          OFFSET(lamount),  AV_OPT_TYPE_FLOAT, { .dbl = 1 },       -2,        5, FLAGS },
     256             :     { "la",             "set luma effect strength",          OFFSET(lamount),  AV_OPT_TYPE_FLOAT, { .dbl = 1 },       -2,        5, FLAGS },
     257             :     { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     258             :     { "cx",             "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     259             :     { "chroma_msize_y", "set chroma matrix vertical size",   OFFSET(cmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     260             :     { "cy",             "set chroma matrix vertical size",   OFFSET(cmsize_y), AV_OPT_TYPE_INT,   { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS },
     261             :     { "chroma_amount",  "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
     262             :     { "ca",             "set chroma effect strength",        OFFSET(camount),  AV_OPT_TYPE_FLOAT, { .dbl = 0 },       -2,        5, FLAGS },
     263             :     { "opencl",         "ignored",                           OFFSET(opencl),   AV_OPT_TYPE_BOOL,  { .i64 = 0 },        0,        1, FLAGS },
     264             :     { NULL }
     265             : };
     266             : 
     267             : AVFILTER_DEFINE_CLASS(unsharp);
     268             : 
     269             : static const AVFilterPad avfilter_vf_unsharp_inputs[] = {
     270             :     {
     271             :         .name         = "default",
     272             :         .type         = AVMEDIA_TYPE_VIDEO,
     273             :         .filter_frame = filter_frame,
     274             :         .config_props = config_props,
     275             :     },
     276             :     { NULL }
     277             : };
     278             : 
     279             : static const AVFilterPad avfilter_vf_unsharp_outputs[] = {
     280             :     {
     281             :         .name = "default",
     282             :         .type = AVMEDIA_TYPE_VIDEO,
     283             :     },
     284             :     { NULL }
     285             : };
     286             : 
     287             : AVFilter ff_vf_unsharp = {
     288             :     .name          = "unsharp",
     289             :     .description   = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."),
     290             :     .priv_size     = sizeof(UnsharpContext),
     291             :     .priv_class    = &unsharp_class,
     292             :     .init          = init,
     293             :     .uninit        = uninit,
     294             :     .query_formats = query_formats,
     295             :     .inputs        = avfilter_vf_unsharp_inputs,
     296             :     .outputs       = avfilter_vf_unsharp_outputs,
     297             :     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
     298             : };

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