Signed-off-by: Paul B Mahol <one...@gmail.com> --- libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_convolution.c | 331 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 333 insertions(+) create mode 100644 libavfilter/vf_convolution.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 058b9e9..0a0fa16 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -105,6 +105,7 @@ OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o OBJS-$(CONFIG_COLORKEY_FILTER) += vf_colorkey.o OBJS-$(CONFIG_COLORLEVELS_FILTER) += vf_colorlevels.o OBJS-$(CONFIG_COLORMATRIX_FILTER) += vf_colormatrix.o +OBJS-$(CONFIG_CONVOLUTION_FILTER) += vf_convolution.o OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o OBJS-$(CONFIG_COVER_RECT_FILTER) += vf_cover_rect.o lavfutils.o OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index b0d8410..122dc0d 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -121,6 +121,7 @@ void avfilter_register_all(void) REGISTER_FILTER(COLORKEY, colorkey, vf); REGISTER_FILTER(COLORLEVELS, colorlevels, vf); REGISTER_FILTER(COLORMATRIX, colormatrix, vf); + REGISTER_FILTER(CONVOLUTION, convolution, vf); REGISTER_FILTER(COPY, copy, vf); REGISTER_FILTER(COVER_RECT, cover_rect, vf); REGISTER_FILTER(CROP, crop, vf); diff --git a/libavfilter/vf_convolution.c b/libavfilter/vf_convolution.c new file mode 100644 index 0000000..3908316 --- /dev/null +++ b/libavfilter/vf_convolution.c @@ -0,0 +1,331 @@ +/* + * Copyright (c) 2012-2013 Oka Motofumi (chikuzen.mo at gmail dot com) + * Copyright (c) 2015 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/avstring.h" +#include "libavutil/imgutils.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "formats.h" +#include "internal.h" +#include "video.h" + +typedef struct ConvolutionContext { + const AVClass *class; + + char *matrix_str[4]; + float rdiv; + float bias; + + int bstride; + uint8_t *buffer; + int nb_planes; + int planewidth[4]; + int planeheight[4]; + int matrix[4][25]; + int matrix_length[4]; + int copy[4]; + + void (*filter[4])(struct ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane); +} ConvolutionContext; + +#define OFFSET(x) offsetof(ConvolutionContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption convolution_options[] = { + { "m0", "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 }, + { "m1", "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 }, + { "m2", "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 }, + { "m3", "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 }, + { "rdiv", "set rdiv", OFFSET(rdiv), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 1.0, INT_MAX, FLAGS}, + { "bias", "set bias", OFFSET(bias), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS}, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(convolution); + +static const int same3x3[9] = {0, 0, 0, + 0, 1, 0, + 0, 0, 0}; + +static const int same5x5[25] = {0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, + 0, 0, 1, 0, 0, + 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0}; + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P, + AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, + AV_PIX_FMT_GRAY8, + AV_PIX_FMT_NONE + }; + + ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); + + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + ConvolutionContext *s = inlink->dst->priv; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + int ret; + + if ((ret = av_image_fill_linesizes(s->planewidth, inlink->format, inlink->w)) < 0) + return ret; + + s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); + s->planeheight[0] = s->planeheight[3] = inlink->h; + + s->nb_planes = av_pix_fmt_count_planes(inlink->format); + + s->bstride = s->planewidth[0] + 32; + s->buffer = av_malloc(5 * s->bstride); + if (!s->buffer) + return AVERROR(ENOMEM); + + return 0; +} + +static inline void line_copy8(uint8_t *line, const uint8_t *srcp, int width, int mergin) +{ + int i; + + memcpy(line, srcp, width); + + for (i = mergin; i > 0; i--) { + line[-i] = line[i]; + line[width - 1 + i] = line[width - 1 - i]; + } +} + +static void filter_3x3(ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane) +{ + const uint8_t *src = in->data[plane]; + uint8_t *dst = out->data[plane]; + const int stride = in->linesize[plane]; + const int bstride = s->bstride; + const int height = s->planeheight[plane]; + const int width = s->planewidth[plane]; + uint8_t *p0 = s->buffer + 16; + uint8_t *p1 = p0 + bstride; + uint8_t *p2 = p1 + bstride; + uint8_t *orig = p0, *end = p2; + const int *matrix = s->matrix[plane]; + const float rdiv = s->rdiv; + const float bias = s->bias; + int y, x; + + line_copy8(p0, src + stride, width, 1); + line_copy8(p1, src, width, 1); + + for (y = 0; y < height; y++) { + src += stride * (y < height - 1 ? 1 : -1); + line_copy8(p2, src, width, 1); + + for (x = 0; x < width; x++) { + int sum = p0[x - 1] * matrix[0] + + p0[x] * matrix[1] + + p0[x + 1] * matrix[2] + + p1[x - 1] * matrix[3] + + p1[x] * matrix[4] + + p1[x + 1] * matrix[5] + + p2[x - 1] * matrix[6] + + p2[x] * matrix[7] + + p2[x + 1] * matrix[8]; + sum = (int)(sum * rdiv + bias + 0.5f); + dst[x] = av_clip(sum, 0, 255); + } + + p0 = p1; + p1 = p2; + p2 = (p2 == end) ? orig: p2 + bstride; + dst += out->linesize[plane]; + } +} + +static void filter_5x5(ConvolutionContext *s, AVFrame *in, AVFrame *out, int plane) +{ + const uint8_t *src = in->data[plane]; + uint8_t *dst = out->data[plane]; + const int stride = in->linesize[plane]; + const int bstride = s->bstride; + const int height = s->planeheight[plane]; + const int width = s->planewidth[plane]; + uint8_t *p0 = s->buffer + 16; + uint8_t *p1 = p0 + bstride; + uint8_t *p2 = p1 + bstride; + uint8_t *p3 = p2 + bstride; + uint8_t *p4 = p3 + bstride; + uint8_t *orig = p0, *end = p4; + const int *matrix = s->matrix[plane]; + float rdiv = s->rdiv; + float bias = s->bias; + int y, x, i; + + line_copy8(p0, src + 2 * stride, width, 2); + line_copy8(p1, src + stride, width, 2); + line_copy8(p2, src, width, 2); + src += stride; + line_copy8(p3, src, width, 2); + + + for (y = 0; y < height; y++) { + uint8_t *array[] = { + p0 - 2, p0 - 1, p0, p0 + 1, p0 + 2, + p1 - 2, p1 - 1, p1, p1 + 1, p1 + 2, + p2 - 2, p2 - 1, p2, p2 + 1, p2 + 2, + p3 - 2, p3 - 1, p3, p3 + 1, p3 + 2, + p4 - 2, p4 - 1, p4, p4 + 1, p4 + 2 + }; + + src += stride * (y < height - 2 ? 1 : -1); + line_copy8(p4, src, width, 2); + + for (x = 0; x < width; x++) { + int sum = 0; + + for (i = 0; i < 25; i++) { + sum += *(array[i] + x) * matrix[i]; + } + sum = (int)(sum * rdiv + bias + 0.5f); + dst[x] = av_clip(sum, 0, 255); + } + + p0 = p1; + p1 = p2; + p2 = p3; + p3 = p4; + p4 = (p4 == end) ? orig: p4 + bstride; + dst += out->linesize[plane]; + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + ConvolutionContext *s = inlink->dst->priv; + AVFilterLink *outlink = inlink->dst->outputs[0]; + AVFrame *out; + int plane; + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) { + av_frame_free(&in); + return AVERROR(ENOMEM); + } + av_frame_copy_props(out, in); + + for (plane = 0; plane < s->nb_planes; plane++) { + if (s->copy[plane]) { + av_image_copy_plane(out->data[plane], out->linesize[plane], + in->data[plane], in->linesize[plane], + s->planewidth[plane], + s->planeheight[plane]); + continue; + } + + s->filter[plane](s, in, out, plane); + } + + av_frame_free(&in); + return ff_filter_frame(outlink, out); +} + +static av_cold int init(AVFilterContext *ctx) +{ + ConvolutionContext *s = ctx->priv; + int i; + + for (i = 0; i < 4; i++) { + int *matrix = (int *)s->matrix[i]; + char *p, *arg, *saveptr = NULL; + + p = s->matrix_str[i]; + while (s->matrix_length[i] < 25) { + if (!(arg = av_strtok(p, " ", &saveptr))) + break; + + p = NULL; + sscanf(arg, "%d", &matrix[s->matrix_length[i]]); + s->matrix_length[i]++; + } + + if (s->matrix_length[i] == 9) { + if (!memcmp(matrix, same3x3, sizeof(same3x3))) + s->copy[i] = 1; + else + s->filter[i] = filter_3x3; + } else if (s->matrix_length[i] == 25) { + if (!memcmp(matrix, same5x5, sizeof(same5x5))) + s->copy[i] = 1; + else + s->filter[i] = filter_5x5; + } else { + return AVERROR(EINVAL); + } + } + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + ConvolutionContext *s = ctx->priv; + + av_freep(&s->buffer); +} + +static const AVFilterPad convolution_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad convolution_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_convolution = { + .name = "convolution", + .description = NULL_IF_CONFIG_SMALL("Apply convolution filter."), + .priv_size = sizeof(ConvolutionContext), + .priv_class = &convolution_class, + .init = init, + .uninit = uninit, + .query_formats = query_formats, + .inputs = convolution_inputs, + .outputs = convolution_outputs, +}; -- 1.7.11.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel