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Diffstat (limited to 'libavfilter/vf_avgblur.c')
-rw-r--r-- | libavfilter/vf_avgblur.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/libavfilter/vf_avgblur.c b/libavfilter/vf_avgblur.c new file mode 100644 index 0000000000..2bb2ab1ed5 --- /dev/null +++ b/libavfilter/vf_avgblur.c @@ -0,0 +1,326 @@ +/* + * Copyright (c) 2016 Paul B Mahol + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#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 AverageBlurContext { + const AVClass *class; + + int radius; + int radiusV; + int planes; + + int depth; + int planewidth[4]; + int planeheight[4]; + float *buffer; + int nb_planes; + + int (*filter_horizontally)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); + int (*filter_vertically)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); +} AverageBlurContext; + +#define OFFSET(x) offsetof(AverageBlurContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption avgblur_options[] = { + { "sizeX", "set horizontal size", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 1024, FLAGS }, + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS }, + { "sizeY", "set vertical size", OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0}, 0, 1024, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(avgblur); + +typedef struct ThreadData { + int height; + int width; + uint8_t *ptr; + int linesize; +} ThreadData; + +#define HORIZONTAL_FILTER(name, type) \ +static int filter_horizontally_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)\ +{ \ + AverageBlurContext *s = ctx->priv; \ + ThreadData *td = arg; \ + const int height = td->height; \ + const int width = td->width; \ + const int slice_start = (height * jobnr ) / nb_jobs; \ + const int slice_end = (height * (jobnr+1)) / nb_jobs; \ + const int radius = FFMIN(s->radius, width / 2); \ + const int linesize = td->linesize / sizeof(type); \ + float *buffer = s->buffer; \ + const type *src; \ + float *ptr; \ + int y, x; \ + \ + /* Filter horizontally along each row */ \ + for (y = slice_start; y < slice_end; y++) { \ + float acc = 0; \ + int count = 0; \ + \ + src = (const type *)td->ptr + linesize * y; \ + ptr = buffer + width * y; \ + \ + for (x = 0; x < radius; x++) { \ + acc += src[x]; \ + } \ + count += radius; \ + \ + for (x = 0; x <= radius; x++) { \ + acc += src[x + radius]; \ + count++; \ + ptr[x] = acc / count; \ + } \ + \ + for (; x < width - radius; x++) { \ + acc += src[x + radius] - src[x - radius - 1]; \ + ptr[x] = acc / count; \ + } \ + \ + for (; x < width; x++) { \ + acc -= src[x - radius]; \ + count--; \ + ptr[x] = acc / count; \ + } \ + } \ + \ + return 0; \ +} + +HORIZONTAL_FILTER(8, uint8_t) +HORIZONTAL_FILTER(16, uint16_t) + +#define VERTICAL_FILTER(name, type) \ +static int filter_vertically_##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ +{ \ + AverageBlurContext *s = ctx->priv; \ + ThreadData *td = arg; \ + const int height = td->height; \ + const int width = td->width; \ + const int slice_start = (width * jobnr ) / nb_jobs; \ + const int slice_end = (width * (jobnr+1)) / nb_jobs; \ + const int radius = FFMIN(s->radiusV, height / 2); \ + const int linesize = td->linesize / sizeof(type); \ + type *buffer = (type *)td->ptr; \ + const float *src; \ + type *ptr; \ + int i, x; \ + \ + /* Filter vertically along each column */ \ + for (x = slice_start; x < slice_end; x++) { \ + float acc = 0; \ + int count = 0; \ + \ + ptr = buffer + x; \ + src = s->buffer + x; \ + \ + for (i = 0; i < radius; i++) { \ + acc += src[0]; \ + src += width; \ + } \ + count += radius; \ + \ + src = s->buffer + x; \ + ptr = buffer + x; \ + for (i = 0; i <= radius; i++) { \ + acc += src[(i + radius) * width]; \ + count++; \ + ptr[i * linesize] = acc / count; \ + } \ + \ + for (; i < height - radius; i++) { \ + acc += src[(i + radius) * width] - src[(i - radius - 1) * width]; \ + ptr[i * linesize] = acc / count; \ + } \ + \ + for (; i < height; i++) { \ + acc -= src[(i - radius) * width]; \ + count--; \ + ptr[i * linesize] = acc / count; \ + } \ + } \ + \ + return 0; \ +} + +VERTICAL_FILTER(8, uint8_t) +VERTICAL_FILTER(16, uint16_t) + +static int config_input(AVFilterLink *inlink) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + AverageBlurContext *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(inlink->w, inlink->h * sizeof(*s->buffer)); + if (!s->buffer) + return AVERROR(ENOMEM); + + if (s->radiusV <= 0) { + s->radiusV = s->radius; + } + + if (s->depth == 8) { + s->filter_horizontally = filter_horizontally_8; + s->filter_vertically = filter_vertically_8; + } else { + s->filter_horizontally = filter_horizontally_16; + s->filter_vertically = filter_vertically_16; + } + + return 0; +} + +static void averageiir2d(AVFilterContext *ctx, AVFrame *in, AVFrame *out, int plane) +{ + AverageBlurContext *s = ctx->priv; + const int width = s->planewidth[plane]; + const int height = s->planeheight[plane]; + const int nb_threads = ff_filter_get_nb_threads(ctx); + ThreadData td; + + td.width = width; + td.height = height; + td.ptr = in->data[plane]; + td.linesize = in->linesize[plane]; + ctx->internal->execute(ctx, s->filter_horizontally, &td, NULL, FFMIN(height, nb_threads)); + td.ptr = out->data[plane]; + td.linesize = out->linesize[plane]; + ctx->internal->execute(ctx, s->filter_vertically, &td, NULL, FFMIN(width, nb_threads)); +} + +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_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_GBRAP12, AV_PIX_FMT_GBRAP16, + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16, + AV_PIX_FMT_NONE + }; + + return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + AverageBlurContext *s = ctx->priv; + AVFilterLink *outlink = ctx->outputs[0]; + AVFrame *out; + int plane; + + 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]; + + 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; + } + + averageiir2d(ctx, in, out, plane); + } + + if (out != in) + av_frame_free(&in); + return ff_filter_frame(outlink, out); +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + AverageBlurContext *s = ctx->priv; + + av_freep(&s->buffer); +} + +static const AVFilterPad avgblur_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad avgblur_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_avgblur = { + .name = "avgblur", + .description = NULL_IF_CONFIG_SMALL("Apply Average Blur filter."), + .priv_size = sizeof(AverageBlurContext), + .priv_class = &avgblur_class, + .uninit = uninit, + .query_formats = query_formats, + .inputs = avgblur_inputs, + .outputs = avgblur_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, +}; |