| /* |
| * Copyright (c) 2020 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/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| typedef struct DBlurContext { |
| const AVClass *class; |
| |
| float angle; |
| float radius; |
| int planes; |
| |
| float b0, b1, q, c, R3; |
| |
| int depth; |
| int planewidth[4]; |
| int planeheight[4]; |
| float *buffer; |
| int nb_planes; |
| void (*horiz_slice)(float *buffer, int width, int height, int steps, float nu, float bscale); |
| } DBlurContext; |
| |
| #define OFFSET(x) offsetof(DBlurContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption dblur_options[] = { |
| { "angle", "set angle", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl=45}, 0.0, 360, FLAGS }, |
| { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_FLOAT, {.dbl=5}, 1, 8192, FLAGS }, |
| { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(dblur); |
| |
| #define f(n, m) (dst[(n) * width + (m)]) |
| |
| static int filter_horizontally(AVFilterContext *ctx, int width, int height) |
| { |
| DBlurContext *s = ctx->priv; |
| const float b0 = s->b0; |
| const float b1 = s->b1; |
| const float q = s->q; |
| const float c = s->c; |
| float *dst = s->buffer; |
| float g; |
| |
| if (s->R3 > 0) { |
| for (int y = 1; y < height - 1; y++) { |
| g = q * f(0, 0) + c * f(0, 0); |
| for (int x = 0; x < width; x++) { |
| f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g; |
| g = q * f(y, x) + c * f(y - 1, x); |
| } |
| } |
| |
| for (int y = height - 2; y >= 0; y--) { |
| g = q * f(y, width - 1) + c * f(y, width - 1); |
| for (int x = width - 1; x >= 0; x--) { |
| f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g; |
| g = q * f(y, x) + c * f(y + 1, x); |
| } |
| } |
| } else { |
| for (int y = 1; y < height - 1; y++) { |
| g = q * f(0, width - 1) + c * f(0, width - 1); |
| for (int x = width - 1; x >= 0; x--) { |
| f(y, x) = b0 * f(y, x) + b1 * f(y - 1, x) + g; |
| g = q * f(y, x) + c * f(y - 1, x); |
| } |
| } |
| |
| for (int y = height - 2; y >= 0; y--) { |
| g = q * f(y, 0) + c * f(y, 0); |
| for (int x = 0; x < width; x++) { |
| f(y, x) = b0 * f(y, x) + b1 * f(y + 1, x) + g; |
| g = q * f(y, x) + c * f(y + 1, x); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void diriir2d(AVFilterContext *ctx, int plane) |
| { |
| DBlurContext *s = ctx->priv; |
| const int width = s->planewidth[plane]; |
| const int height = s->planeheight[plane]; |
| |
| filter_horizontally(ctx, width, height); |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
| AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
| AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, |
| AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, |
| AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
| AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
| AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12, |
| AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
| AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
| AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
| AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
| AV_PIX_FMT_NONE |
| }; |
| |
| return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| DBlurContext *s = inlink->dst->priv; |
| |
| s->depth = desc->comp[0].depth; |
| s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); |
| s->planewidth[0] = s->planewidth[3] = inlink->w; |
| 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->buffer = av_malloc_array(FFALIGN(inlink->w, 16), FFALIGN(inlink->h, 16) * sizeof(*s->buffer)); |
| if (!s->buffer) |
| return AVERROR(ENOMEM); |
| |
| return 0; |
| } |
| |
| static void set_params(DBlurContext *s, float angle, float r) |
| { |
| float mu, nu, R1, R2, w1, w2; |
| float a0, a1, a2, a3; |
| |
| angle = angle * M_PI / 180.f; |
| |
| mu = cosf(angle); |
| nu = sinf(angle); |
| R1 = (mu * r) * (mu * r); |
| R2 = (nu * r) * (nu * r); |
| s->R3 = mu * nu * r * r; |
| w1 = sqrtf(0.25f + R1); |
| w2 = sqrtf(0.25f + R2); |
| a0 = (w1 + 0.5f) * (w2 + 0.5f) - fabsf(s->R3); |
| a1 = 0.5f + w2 - a0; |
| a2 = 0.5f + w1 - a0; |
| a3 = a0 - w1 - w2; |
| s->b0 = 1.f / a0; |
| s->b1 = -a2 / a0; |
| s->q = -a1 / a0; |
| s->c = -a3 / a0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| DBlurContext *s = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out; |
| int plane; |
| |
| set_params(s, s->angle, s->radius); |
| |
| if (av_frame_is_writable(in)) { |
| out = in; |
| } else { |
| 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++) { |
| const int height = s->planeheight[plane]; |
| const int width = s->planewidth[plane]; |
| float *bptr = s->buffer; |
| const uint8_t *src = in->data[plane]; |
| const uint16_t *src16 = (const uint16_t *)in->data[plane]; |
| uint8_t *dst = out->data[plane]; |
| uint16_t *dst16 = (uint16_t *)out->data[plane]; |
| int y, x; |
| |
| if (!(s->planes & (1 << plane))) { |
| if (out != in) |
| av_image_copy_plane(out->data[plane], out->linesize[plane], |
| in->data[plane], in->linesize[plane], |
| width * ((s->depth + 7) / 8), height); |
| continue; |
| } |
| |
| if (s->depth == 8) { |
| for (y = 0; y < height; y++) { |
| for (x = 0; x < width; x++) { |
| bptr[x] = src[x]; |
| } |
| bptr += width; |
| src += in->linesize[plane]; |
| } |
| } else { |
| for (y = 0; y < height; y++) { |
| for (x = 0; x < width; x++) { |
| bptr[x] = src16[x]; |
| } |
| bptr += width; |
| src16 += in->linesize[plane] / 2; |
| } |
| } |
| |
| diriir2d(ctx, plane); |
| |
| bptr = s->buffer; |
| if (s->depth == 8) { |
| for (y = 0; y < height; y++) { |
| for (x = 0; x < width; x++) { |
| dst[x] = bptr[x]; |
| } |
| bptr += width; |
| dst += out->linesize[plane]; |
| } |
| } else { |
| for (y = 0; y < height; y++) { |
| for (x = 0; x < width; x++) { |
| dst16[x] = bptr[x]; |
| } |
| bptr += width; |
| dst16 += out->linesize[plane] / 2; |
| } |
| } |
| } |
| |
| if (out != in) |
| av_frame_free(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| DBlurContext *s = ctx->priv; |
| |
| av_freep(&s->buffer); |
| } |
| |
| static const AVFilterPad dblur_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_input, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad dblur_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_dblur = { |
| .name = "dblur", |
| .description = NULL_IF_CONFIG_SMALL("Apply Directional Blur filter."), |
| .priv_size = sizeof(DBlurContext), |
| .priv_class = &dblur_class, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = dblur_inputs, |
| .outputs = dblur_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| .process_command = ff_filter_process_command, |
| }; |