| /* |
| * 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" |
| #include "unsharp_opencl.h" |
| |
| static void apply_unsharp( uint8_t *dst, int dst_stride, |
| const uint8_t *src, int src_stride, |
| int width, int height, UnsharpFilterParam *fp) |
| { |
| uint32_t **sc = fp->sc; |
| uint32_t sr[MAX_MATRIX_SIZE - 1], tmp1, tmp2; |
| |
| int32_t res; |
| int x, y, z; |
| const uint8_t *src2 = NULL; //silence a warning |
| 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; |
| |
| if (!amount) { |
| av_image_copy_plane(dst, dst_stride, src, src_stride, width, height); |
| return; |
| } |
| |
| for (y = 0; y < 2 * steps_y; y++) |
| memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); |
| |
| for (y = -steps_y; y < height + steps_y; y++) { |
| if (y < height) |
| src2 = src; |
| |
| memset(sr, 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[z + 0] + tmp1; sr[z + 0] = tmp1; |
| tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2; |
| } |
| for (z = 0; z < steps_y * 2; z += 2) { |
| tmp2 = sc[z + 0][x + steps_x] + tmp1; sc[z + 0][x + steps_x] = tmp1; |
| tmp1 = sc[z + 1][x + steps_x] + tmp2; sc[z + 1][x + steps_x] = tmp2; |
| } |
| if (x >= steps_x && y >= steps_y) { |
| const uint8_t *srx = src - steps_y * src_stride + x - steps_x; |
| uint8_t *dsx = dst - steps_y * dst_stride + x - steps_x; |
| |
| res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> 16); |
| *dsx = av_clip_uint8(res); |
| } |
| } |
| if (y >= 0) { |
| dst += dst_stride; |
| src += src_stride; |
| } |
| } |
| } |
| |
| 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]; |
| 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++) { |
| apply_unsharp(out->data[i], out->linesize[i], in->data[i], in->linesize[i], plane_w[i], plane_h[i], fp[i]); |
| } |
| 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) |
| { |
| int ret = 0; |
| 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); |
| |
| s->apply_unsharp = apply_unsharp_c; |
| if (!CONFIG_OPENCL && s->opencl) { |
| av_log(ctx, AV_LOG_ERROR, "OpenCL support was not enabled in this build, cannot be selected\n"); |
| return AVERROR(EINVAL); |
| } |
| if (CONFIG_OPENCL && s->opencl) { |
| s->apply_unsharp = ff_opencl_apply_unsharp; |
| ret = ff_opencl_unsharp_init(ctx); |
| if (ret < 0) |
| return ret; |
| } |
| 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_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; |
| 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); |
| |
| for (z = 0; z < 2 * fp->steps_y; 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_props(AVFilterLink *link) |
| { |
| UnsharpContext *s = link->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
| int ret; |
| |
| s->hsub = desc->log2_chroma_w; |
| s->vsub = desc->log2_chroma_h; |
| |
| ret = init_filter_param(link->dst, &s->luma, "luma", link->w); |
| if (ret < 0) |
| return ret; |
| ret = init_filter_param(link->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(link->w, s->hsub)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static void free_filter_param(UnsharpFilterParam *fp) |
| { |
| int z; |
| |
| for (z = 0; z < 2 * fp->steps_y; z++) |
| av_freep(&fp->sc[z]); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| UnsharpContext *s = ctx->priv; |
| |
| if (CONFIG_OPENCL && s->opencl) { |
| ff_opencl_unsharp_uninit(ctx); |
| } |
| |
| free_filter_param(&s->luma); |
| free_filter_param(&s->chroma); |
| } |
| |
| 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); |
| if (CONFIG_OPENCL && s->opencl) { |
| ret = ff_opencl_unsharp_process_inout_buf(link->dst, in, out); |
| if (ret < 0) |
| goto end; |
| } |
| |
| ret = s->apply_unsharp(link->dst, in, out); |
| end: |
| av_frame_free(&in); |
| |
| if (ret < 0) |
| 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 63 |
| 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", "use OpenCL filtering capabilities", 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_props, |
| }, |
| { 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, |
| }; |
