mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
9 years ago
parent
b18467a943
commit
1c02af307a
6 changed files with 401 additions and 1 deletions
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/*
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* Copyright (c) 2012-2013 Oka Motofumi (chikuzen.mo at gmail dot com) |
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* Copyright (c) 2015 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/imgutils.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 "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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typedef struct ConvolutionContext { |
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const AVClass *class; |
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char *matrix_str[4]; |
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float rdiv[4]; |
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float bias[4]; |
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int bstride; |
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uint8_t *buffer; |
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int nb_planes; |
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int planewidth[4]; |
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int planeheight[4]; |
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int matrix[4][25]; |
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int matrix_length[4]; |
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int copy[4]; |
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void (*filter[4])(struct ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane); |
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} ConvolutionContext; |
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#define OFFSET(x) offsetof(ConvolutionContext, x) |
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
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static const AVOption convolution_options[] = { |
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{ "0m", "set matrix for 1st plane", OFFSET(matrix_str[0]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS }, |
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{ "1m", "set matrix for 2nd plane", OFFSET(matrix_str[1]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS }, |
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{ "2m", "set matrix for 3rd plane", OFFSET(matrix_str[2]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS }, |
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{ "3m", "set matrix for 4th plane", OFFSET(matrix_str[3]), AV_OPT_TYPE_STRING, {.str="0 0 0 0 1 0 0 0 0"}, 0, 0, FLAGS }, |
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{ "0rdiv", "set rdiv for 1st plane", OFFSET(rdiv[0]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS}, |
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{ "1rdiv", "set rdiv for 2nd plane", OFFSET(rdiv[1]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS}, |
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{ "2rdiv", "set rdiv for 3rd plane", OFFSET(rdiv[2]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS}, |
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{ "3rdiv", "set rdiv for 4th plane", OFFSET(rdiv[3]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS}, |
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{ "0bias", "set bias for 1st plane", OFFSET(bias[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS}, |
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{ "1bias", "set bias for 2nd plane", OFFSET(bias[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS}, |
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{ "2bias", "set bias for 3rd plane", OFFSET(bias[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS}, |
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{ "3bias", "set bias for 4th plane", OFFSET(bias[3]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS}, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(convolution); |
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static const int same3x3[9] = {0, 0, 0, |
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0, 1, 0, |
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0, 0, 0}; |
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static const int same5x5[25] = {0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, |
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0, 0, 1, 0, 0, |
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0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0}; |
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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_YUV444P, AV_PIX_FMT_YUV422P, |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, |
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P, |
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, |
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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_input(AVFilterLink *inlink) |
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{ |
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ConvolutionContext *s = inlink->dst->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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int ret; |
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if ((ret = av_image_fill_linesizes(s->planewidth, inlink->format, inlink->w)) < 0) |
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return ret; |
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s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
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s->planeheight[0] = s->planeheight[3] = inlink->h; |
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s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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s->bstride = s->planewidth[0] + 32; |
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s->buffer = av_malloc(5 * s->bstride); |
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if (!s->buffer) |
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return AVERROR(ENOMEM); |
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return 0; |
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} |
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static inline void line_copy8(uint8_t *line, const uint8_t *srcp, int width, int mergin) |
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{ |
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int i; |
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memcpy(line, srcp, width); |
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for (i = mergin; i > 0; i--) { |
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line[-i] = line[i]; |
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line[width - 1 + i] = line[width - 1 - i]; |
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} |
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} |
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static void filter_3x3(ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane) |
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{ |
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const uint8_t *src = in->data[plane]; |
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uint8_t *dst = out->data[plane]; |
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const int stride = in->linesize[plane]; |
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const int bstride = s->bstride; |
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const int height = s->planeheight[plane]; |
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const int width = s->planewidth[plane]; |
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uint8_t *p0 = s->buffer + 16; |
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uint8_t *p1 = p0 + bstride; |
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uint8_t *p2 = p1 + bstride; |
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uint8_t *orig = p0, *end = p2; |
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const int *matrix = s->matrix[plane]; |
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const float rdiv = s->rdiv[plane]; |
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const float bias = s->bias[plane]; |
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int y, x; |
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line_copy8(p0, src + stride, width, 1); |
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line_copy8(p1, src, width, 1); |
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for (y = 0; y < height; y++) { |
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src += stride * (y < height - 1 ? 1 : -1); |
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line_copy8(p2, src, width, 1); |
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for (x = 0; x < width; x++) { |
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int sum = p0[x - 1] * matrix[0] + |
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p0[x] * matrix[1] + |
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p0[x + 1] * matrix[2] + |
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p1[x - 1] * matrix[3] + |
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p1[x] * matrix[4] + |
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p1[x + 1] * matrix[5] + |
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p2[x - 1] * matrix[6] + |
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p2[x] * matrix[7] + |
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p2[x + 1] * matrix[8]; |
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sum = (int)(sum * rdiv + bias + 0.5f); |
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dst[x] = av_clip(sum, 0, 255); |
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} |
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p0 = p1; |
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p1 = p2; |
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p2 = (p2 == end) ? orig: p2 + bstride; |
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dst += out->linesize[plane]; |
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} |
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} |
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static void filter_5x5(ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane) |
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{ |
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const uint8_t *src = in->data[plane]; |
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uint8_t *dst = out->data[plane]; |
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const int stride = in->linesize[plane]; |
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const int bstride = s->bstride; |
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const int height = s->planeheight[plane]; |
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const int width = s->planewidth[plane]; |
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uint8_t *p0 = s->buffer + 16; |
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uint8_t *p1 = p0 + bstride; |
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uint8_t *p2 = p1 + bstride; |
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uint8_t *p3 = p2 + bstride; |
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uint8_t *p4 = p3 + bstride; |
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uint8_t *orig = p0, *end = p4; |
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const int *matrix = s->matrix[plane]; |
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float rdiv = s->rdiv[plane]; |
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float bias = s->bias[plane]; |
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int y, x, i; |
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line_copy8(p0, src + 2 * stride, width, 2); |
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line_copy8(p1, src + stride, width, 2); |
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line_copy8(p2, src, width, 2); |
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src += stride; |
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line_copy8(p3, src, width, 2); |
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for (y = 0; y < height; y++) { |
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uint8_t *array[] = { |
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p0 - 2, p0 - 1, p0, p0 + 1, p0 + 2, |
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p1 - 2, p1 - 1, p1, p1 + 1, p1 + 2, |
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p2 - 2, p2 - 1, p2, p2 + 1, p2 + 2, |
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p3 - 2, p3 - 1, p3, p3 + 1, p3 + 2, |
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p4 - 2, p4 - 1, p4, p4 + 1, p4 + 2 |
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}; |
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src += stride * (y < height - 2 ? 1 : -1); |
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line_copy8(p4, src, width, 2); |
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for (x = 0; x < width; x++) { |
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int sum = 0; |
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for (i = 0; i < 25; i++) { |
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sum += *(array[i] + x) * matrix[i]; |
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} |
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sum = (int)(sum * rdiv + bias + 0.5f); |
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dst[x] = av_clip(sum, 0, 255); |
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} |
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p0 = p1; |
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p1 = p2; |
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p2 = p3; |
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p3 = p4; |
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p4 = (p4 == end) ? orig: p4 + bstride; |
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dst += out->linesize[plane]; |
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} |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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ConvolutionContext *s = inlink->dst->priv; |
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AVFilterLink *outlink = inlink->dst->outputs[0]; |
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AVFrame *out; |
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int plane; |
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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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for (plane = 0; plane < s->nb_planes; plane++) { |
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if (s->copy[plane]) { |
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av_image_copy_plane(out->data[plane], out->linesize[plane], |
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in->data[plane], in->linesize[plane], |
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s->planewidth[plane], |
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s->planeheight[plane]); |
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continue; |
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} |
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s->filter[plane](s, in, out, plane); |
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} |
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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 av_cold int init(AVFilterContext *ctx) |
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{ |
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ConvolutionContext *s = ctx->priv; |
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int i; |
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for (i = 0; i < 4; i++) { |
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int *matrix = (int *)s->matrix[i]; |
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char *p, *arg, *saveptr = NULL; |
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p = s->matrix_str[i]; |
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while (s->matrix_length[i] < 25) { |
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if (!(arg = av_strtok(p, " ", &saveptr))) |
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break; |
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p = NULL; |
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sscanf(arg, "%d", &matrix[s->matrix_length[i]]); |
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s->matrix_length[i]++; |
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} |
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if (s->matrix_length[i] == 9) { |
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if (!memcmp(matrix, same3x3, sizeof(same3x3))) |
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s->copy[i] = 1; |
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else |
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s->filter[i] = filter_3x3; |
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} else if (s->matrix_length[i] == 25) { |
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if (!memcmp(matrix, same5x5, sizeof(same5x5))) |
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s->copy[i] = 1; |
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else |
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s->filter[i] = filter_5x5; |
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} else { |
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return AVERROR(EINVAL); |
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} |
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} |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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ConvolutionContext *s = ctx->priv; |
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av_freep(&s->buffer); |
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} |
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static const AVFilterPad convolution_inputs[] = { |
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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_input, |
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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 convolution_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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}, |
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{ NULL } |
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}; |
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AVFilter ff_vf_convolution = { |
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.name = "convolution", |
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.description = NULL_IF_CONFIG_SMALL("Apply convolution filter."), |
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.priv_size = sizeof(ConvolutionContext), |
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.priv_class = &convolution_class, |
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.init = init, |
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.uninit = uninit, |
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.query_formats = query_formats, |
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.inputs = convolution_inputs, |
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.outputs = convolution_outputs, |
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}; |
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