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-rw-r--r--libavfilter/vf_convolution.c336
1 files changed, 336 insertions, 0 deletions
diff --git a/libavfilter/vf_convolution.c b/libavfilter/vf_convolution.c
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+++ b/libavfilter/vf_convolution.c
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+/*
+ * 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[4];
+ float bias[4];
+
+ 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[] = {
+ { "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 },
+ { "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 },
+ { "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 },
+ { "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 },
+ { "0rdiv", "set rdiv for 1st plane", OFFSET(rdiv[0]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
+ { "1rdiv", "set rdiv for 2nd plane", OFFSET(rdiv[1]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
+ { "2rdiv", "set rdiv for 3rd plane", OFFSET(rdiv[2]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
+ { "3rdiv", "set rdiv for 4th plane", OFFSET(rdiv[3]), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, 0.0, INT_MAX, FLAGS},
+ { "0bias", "set bias for 1st plane", OFFSET(bias[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
+ { "1bias", "set bias for 2nd plane", OFFSET(bias[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
+ { "2bias", "set bias for 3rd plane", OFFSET(bias[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.0}, 0.0, INT_MAX, FLAGS},
+ { "3bias", "set bias for 4th plane", OFFSET(bias[3]), 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
+ };
+
+ return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+}
+
+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] = AV_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[plane];
+ const float bias = s->bias[plane];
+ 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_uint8(sum);
+ }
+
+ 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[plane];
+ float bias = s->bias[plane];
+ 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_uint8(sum);
+ }
+
+ 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,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 12:33:54 +0000