| /* |
| * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com> |
| * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org> |
| * Relicensed to the LGPL with permission from Remi Guyomarch. |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * blur / sharpen filter, ported to FFmpeg from MPlayer |
| * libmpcodecs/unsharp.c. |
| * |
| * This code is based on: |
| * |
| * An Efficient algorithm for Gaussian blur using finite-state machines |
| * Frederick M. Waltz and John W. V. Miller |
| * |
| * SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII |
| * Originally published Boston, Nov 98 |
| * |
| * http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf |
| */ |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| #include "libavutil/common.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "unsharp.h" |
| |
| typedef struct TheadData { |
| UnsharpFilterParam *fp; |
| uint8_t *dst; |
| const uint8_t *src; |
| int dst_stride; |
| int src_stride; |
| int width; |
| int height; |
| } ThreadData; |
| |
| #define DEF_UNSHARP_SLICE_FUNC(name, nbits) \ |
| static int name##_##nbits(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \ |
| { \ |
| ThreadData *td = arg; \ |
| UnsharpFilterParam *fp = td->fp; \ |
| UnsharpContext *s = ctx->priv; \ |
| uint32_t **sc = fp->sc; \ |
| uint32_t *sr = fp->sr; \ |
| const uint##nbits##_t *src2 = NULL; \ |
| const int amount = fp->amount; \ |
| const int steps_x = fp->steps_x; \ |
| const int steps_y = fp->steps_y; \ |
| const int scalebits = fp->scalebits; \ |
| const int32_t halfscale = fp->halfscale; \ |
| \ |
| uint##nbits##_t *dst = (uint##nbits##_t*)td->dst; \ |
| const uint##nbits##_t *src = (const uint##nbits##_t *)td->src; \ |
| int dst_stride = td->dst_stride; \ |
| int src_stride = td->src_stride; \ |
| const int width = td->width; \ |
| const int height = td->height; \ |
| const int sc_offset = jobnr * 2 * steps_y; \ |
| const int sr_offset = jobnr * (MAX_MATRIX_SIZE - 1); \ |
| const int slice_start = (height * jobnr) / nb_jobs; \ |
| const int slice_end = (height * (jobnr+1)) / nb_jobs; \ |
| \ |
| int32_t res; \ |
| int x, y, z; \ |
| uint32_t tmp1, tmp2; \ |
| \ |
| if (!amount) { \ |
| av_image_copy_plane(td->dst + slice_start * dst_stride, dst_stride, \ |
| td->src + slice_start * src_stride, src_stride, \ |
| width * s->bps, slice_end - slice_start); \ |
| return 0; \ |
| } \ |
| \ |
| for (y = 0; y < 2 * steps_y; y++) \ |
| memset(sc[sc_offset + y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); \ |
| \ |
| dst_stride = dst_stride / s->bps; \ |
| src_stride = src_stride / s->bps; \ |
| /* if this is not the first tile, we start from (slice_start - steps_y) */ \ |
| /* so we can get smooth result at slice boundary */ \ |
| if (slice_start > steps_y) { \ |
| src += (slice_start - steps_y) * src_stride; \ |
| dst += (slice_start - steps_y) * dst_stride; \ |
| } \ |
| \ |
| for (y = -steps_y + slice_start; y < steps_y + slice_end; y++) { \ |
| if (y < height) \ |
| src2 = src; \ |
| \ |
| memset(sr + sr_offset, 0, sizeof(sr[0]) * (2 * steps_x - 1)); \ |
| for (x = -steps_x; x < width + steps_x; x++) { \ |
| tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; \ |
| for (z = 0; z < steps_x * 2; z += 2) { \ |
| tmp2 = sr[sr_offset + z + 0] + tmp1; sr[sr_offset + z + 0] = tmp1; \ |
| tmp1 = sr[sr_offset + z + 1] + tmp2; sr[sr_offset + z + 1] = tmp2; \ |
| } \ |
| for (z = 0; z < steps_y * 2; z += 2) { \ |
| tmp2 = sc[sc_offset + z + 0][x + steps_x] + tmp1; \ |
| sc[sc_offset + z + 0][x + steps_x] = tmp1; \ |
| tmp1 = sc[sc_offset + z + 1][x + steps_x] + tmp2; \ |
| sc[sc_offset + z + 1][x + steps_x] = tmp2; \ |
| } \ |
| if (x >= steps_x && y >= (steps_y + slice_start)) { \ |
| const uint##nbits##_t *srx = src - steps_y * src_stride + x - steps_x; \ |
| uint##nbits##_t *dsx = dst - steps_y * dst_stride + x - steps_x; \ |
| \ |
| res = (int32_t)*srx + ((((int32_t) * srx - \ |
| (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> (8+nbits)); \ |
| *dsx = av_clip_uint##nbits(res); \ |
| } \ |
| } \ |
| if (y >= 0) { \ |
| dst += dst_stride; \ |
| src += src_stride; \ |
| } \ |
| } \ |
| return 0; \ |
| } |
| DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 16); |
| DEF_UNSHARP_SLICE_FUNC(unsharp_slice, 8); |
| |
| static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out) |
| { |
| AVFilterLink *inlink = ctx->inputs[0]; |
| UnsharpContext *s = ctx->priv; |
| int i, plane_w[3], plane_h[3]; |
| UnsharpFilterParam *fp[3]; |
| ThreadData td; |
| |
| plane_w[0] = inlink->w; |
| plane_w[1] = plane_w[2] = AV_CEIL_RSHIFT(inlink->w, s->hsub); |
| plane_h[0] = inlink->h; |
| plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub); |
| fp[0] = &s->luma; |
| fp[1] = fp[2] = &s->chroma; |
| for (i = 0; i < 3; i++) { |
| td.fp = fp[i]; |
| td.dst = out->data[i]; |
| td.src = in->data[i]; |
| td.width = plane_w[i]; |
| td.height = plane_h[i]; |
| td.dst_stride = out->linesize[i]; |
| td.src_stride = in->linesize[i]; |
| ctx->internal->execute(ctx, s->unsharp_slice, &td, NULL, FFMIN(plane_h[i], s->nb_threads)); |
| } |
| return 0; |
| } |
| |
| static void set_filter_param(UnsharpFilterParam *fp, int msize_x, int msize_y, float amount) |
| { |
| fp->msize_x = msize_x; |
| fp->msize_y = msize_y; |
| fp->amount = amount * 65536.0; |
| |
| fp->steps_x = msize_x / 2; |
| fp->steps_y = msize_y / 2; |
| fp->scalebits = (fp->steps_x + fp->steps_y) * 2; |
| fp->halfscale = 1 << (fp->scalebits - 1); |
| } |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| UnsharpContext *s = ctx->priv; |
| |
| set_filter_param(&s->luma, s->lmsize_x, s->lmsize_y, s->lamount); |
| set_filter_param(&s->chroma, s->cmsize_x, s->cmsize_y, s->camount); |
| |
| if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26) { |
| av_log(ctx, AV_LOG_ERROR, "luma or chroma matrix size too big\n"); |
| return AVERROR(EINVAL); |
| } |
| s->apply_unsharp = apply_unsharp_c; |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
| 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_YUV440P10, |
| AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, |
| AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE |
| }; |
| |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width) |
| { |
| int z; |
| UnsharpContext *s = ctx->priv; |
| const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; |
| |
| if (!(fp->msize_x & fp->msize_y & 1)) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Invalid even size for %s matrix size %dx%d\n", |
| effect_type, fp->msize_x, fp->msize_y); |
| return AVERROR(EINVAL); |
| } |
| |
| av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", |
| effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); |
| |
| fp->sr = av_malloc_array((MAX_MATRIX_SIZE - 1) * s->nb_threads, sizeof(uint32_t)); |
| fp->sc = av_mallocz_array(2 * fp->steps_y * s->nb_threads, sizeof(uint32_t *)); |
| if (!fp->sr || !fp->sc) |
| return AVERROR(ENOMEM); |
| |
| for (z = 0; z < 2 * fp->steps_y * s->nb_threads; z++) |
| if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x, |
| sizeof(*(fp->sc[z]))))) |
| return AVERROR(ENOMEM); |
| |
| return 0; |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| UnsharpContext *s = inlink->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| int ret; |
| |
| s->hsub = desc->log2_chroma_w; |
| s->vsub = desc->log2_chroma_h; |
| s->bitdepth = desc->comp[0].depth; |
| s->bps = s->bitdepth > 8 ? 2 : 1; |
| s->unsharp_slice = s->bitdepth > 8 ? unsharp_slice_16 : unsharp_slice_8; |
| |
| // ensure (height / nb_threads) > 4 * steps_y, |
| // so that we don't have too much overlap between two threads |
| s->nb_threads = FFMIN(ff_filter_get_nb_threads(inlink->dst), |
| inlink->h / (4 * s->luma.steps_y)); |
| |
| ret = init_filter_param(inlink->dst, &s->luma, "luma", inlink->w); |
| if (ret < 0) |
| return ret; |
| ret = init_filter_param(inlink->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(inlink->w, s->hsub)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static void free_filter_param(UnsharpFilterParam *fp, int nb_threads) |
| { |
| int z; |
| |
| if (fp->sc) { |
| for (z = 0; z < 2 * fp->steps_y * nb_threads; z++) |
| av_freep(&fp->sc[z]); |
| av_freep(&fp->sc); |
| } |
| av_freep(&fp->sr); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| UnsharpContext *s = ctx->priv; |
| |
| free_filter_param(&s->luma, s->nb_threads); |
| free_filter_param(&s->chroma, s->nb_threads); |
| } |
| |
| static int filter_frame(AVFilterLink *link, AVFrame *in) |
| { |
| UnsharpContext *s = link->dst->priv; |
| AVFilterLink *outlink = link->dst->outputs[0]; |
| AVFrame *out; |
| int ret = 0; |
| |
| 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); |
| |
| ret = s->apply_unsharp(link->dst, in, out); |
| |
| av_frame_free(&in); |
| |
| if (ret < 0) { |
| av_frame_free(&out); |
| return ret; |
| } |
| return ff_filter_frame(outlink, out); |
| } |
| |
| #define OFFSET(x) offsetof(UnsharpContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| #define MIN_SIZE 3 |
| #define MAX_SIZE 23 |
| static const AVOption unsharp_options[] = { |
| { "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
| { "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
| { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
| { "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
| { "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
| { "opencl", "ignored", OFFSET(opencl), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(unsharp); |
| |
| static const AVFilterPad avfilter_vf_unsharp_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_unsharp_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_unsharp = { |
| .name = "unsharp", |
| .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), |
| .priv_size = sizeof(UnsharpContext), |
| .priv_class = &unsharp_class, |
| .init = init, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .inputs = avfilter_vf_unsharp_inputs, |
| .outputs = avfilter_vf_unsharp_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
| }; |
