1/* 2 * Original copyright (c) 2002 Remi Guyomarch <rguyom@pobox.com> 3 * Port copyright (c) 2010 Daniel G. Taylor <dan@programmer-art.org> 4 * Relicensed to the LGPL with permission from Remi Guyomarch. 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23/** 24 * @file 25 * blur / sharpen filter, ported to FFmpeg from MPlayer 26 * libmpcodecs/unsharp.c. 27 * 28 * This code is based on: 29 * 30 * An Efficient algorithm for Gaussian blur using finite-state machines 31 * Frederick M. Waltz and John W. V. Miller 32 * 33 * SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII 34 * Originally published Boston, Nov 98 35 * 36 * http://www.engin.umd.umich.edu/~jwvm/ece581/21_GBlur.pdf 37 */ 38 39#include "avfilter.h" 40#include "formats.h" 41#include "internal.h" 42#include "video.h" 43#include "libavutil/common.h" 44#include "libavutil/imgutils.h" 45#include "libavutil/mem.h" 46#include "libavutil/opt.h" 47#include "libavutil/pixdesc.h" 48#include "unsharp.h" 49#include "unsharp_opencl.h" 50 51static void apply_unsharp( uint8_t *dst, int dst_stride, 52 const uint8_t *src, int src_stride, 53 int width, int height, UnsharpFilterParam *fp) 54{ 55 uint32_t **sc = fp->sc; 56 uint32_t sr[MAX_MATRIX_SIZE - 1], tmp1, tmp2; 57 58 int32_t res; 59 int x, y, z; 60 const uint8_t *src2 = NULL; //silence a warning 61 const int amount = fp->amount; 62 const int steps_x = fp->steps_x; 63 const int steps_y = fp->steps_y; 64 const int scalebits = fp->scalebits; 65 const int32_t halfscale = fp->halfscale; 66 67 if (!amount) { 68 av_image_copy_plane(dst, dst_stride, src, src_stride, width, height); 69 return; 70 } 71 72 for (y = 0; y < 2 * steps_y; y++) 73 memset(sc[y], 0, sizeof(sc[y][0]) * (width + 2 * steps_x)); 74 75 for (y = -steps_y; y < height + steps_y; y++) { 76 if (y < height) 77 src2 = src; 78 79 memset(sr, 0, sizeof(sr[0]) * (2 * steps_x - 1)); 80 for (x = -steps_x; x < width + steps_x; x++) { 81 tmp1 = x <= 0 ? src2[0] : x >= width ? src2[width-1] : src2[x]; 82 for (z = 0; z < steps_x * 2; z += 2) { 83 tmp2 = sr[z + 0] + tmp1; sr[z + 0] = tmp1; 84 tmp1 = sr[z + 1] + tmp2; sr[z + 1] = tmp2; 85 } 86 for (z = 0; z < steps_y * 2; z += 2) { 87 tmp2 = sc[z + 0][x + steps_x] + tmp1; sc[z + 0][x + steps_x] = tmp1; 88 tmp1 = sc[z + 1][x + steps_x] + tmp2; sc[z + 1][x + steps_x] = tmp2; 89 } 90 if (x >= steps_x && y >= steps_y) { 91 const uint8_t *srx = src - steps_y * src_stride + x - steps_x; 92 uint8_t *dsx = dst - steps_y * dst_stride + x - steps_x; 93 94 res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + halfscale) >> scalebits)) * amount) >> 16); 95 *dsx = av_clip_uint8(res); 96 } 97 } 98 if (y >= 0) { 99 dst += dst_stride; 100 src += src_stride; 101 } 102 } 103} 104 105static int apply_unsharp_c(AVFilterContext *ctx, AVFrame *in, AVFrame *out) 106{ 107 AVFilterLink *inlink = ctx->inputs[0]; 108 UnsharpContext *unsharp = ctx->priv; 109 int i, plane_w[3], plane_h[3]; 110 UnsharpFilterParam *fp[3]; 111 plane_w[0] = inlink->w; 112 plane_w[1] = plane_w[2] = FF_CEIL_RSHIFT(inlink->w, unsharp->hsub); 113 plane_h[0] = inlink->h; 114 plane_h[1] = plane_h[2] = FF_CEIL_RSHIFT(inlink->h, unsharp->vsub); 115 fp[0] = &unsharp->luma; 116 fp[1] = fp[2] = &unsharp->chroma; 117 for (i = 0; i < 3; i++) { 118 apply_unsharp(out->data[i], out->linesize[i], in->data[i], in->linesize[i], plane_w[i], plane_h[i], fp[i]); 119 } 120 return 0; 121} 122 123static void set_filter_param(UnsharpFilterParam *fp, int msize_x, int msize_y, float amount) 124{ 125 fp->msize_x = msize_x; 126 fp->msize_y = msize_y; 127 fp->amount = amount * 65536.0; 128 129 fp->steps_x = msize_x / 2; 130 fp->steps_y = msize_y / 2; 131 fp->scalebits = (fp->steps_x + fp->steps_y) * 2; 132 fp->halfscale = 1 << (fp->scalebits - 1); 133} 134 135static av_cold int init(AVFilterContext *ctx) 136{ 137 int ret = 0; 138 UnsharpContext *unsharp = ctx->priv; 139 140 141 set_filter_param(&unsharp->luma, unsharp->lmsize_x, unsharp->lmsize_y, unsharp->lamount); 142 set_filter_param(&unsharp->chroma, unsharp->cmsize_x, unsharp->cmsize_y, unsharp->camount); 143 144 unsharp->apply_unsharp = apply_unsharp_c; 145 if (!CONFIG_OPENCL && unsharp->opencl) { 146 av_log(ctx, AV_LOG_ERROR, "OpenCL support was not enabled in this build, cannot be selected\n"); 147 return AVERROR(EINVAL); 148 } 149 if (CONFIG_OPENCL && unsharp->opencl) { 150 unsharp->apply_unsharp = ff_opencl_apply_unsharp; 151 ret = ff_opencl_unsharp_init(ctx); 152 if (ret < 0) 153 return ret; 154 } 155 return 0; 156} 157 158static int query_formats(AVFilterContext *ctx) 159{ 160 static const enum AVPixelFormat pix_fmts[] = { 161 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, 162 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, 163 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE 164 }; 165 166 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); 167 168 return 0; 169} 170 171static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width) 172{ 173 int z; 174 const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; 175 176 if (!(fp->msize_x & fp->msize_y & 1)) { 177 av_log(ctx, AV_LOG_ERROR, 178 "Invalid even size for %s matrix size %dx%d\n", 179 effect_type, fp->msize_x, fp->msize_y); 180 return AVERROR(EINVAL); 181 } 182 183 av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", 184 effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); 185 186 for (z = 0; z < 2 * fp->steps_y; z++) 187 if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x, 188 sizeof(*(fp->sc[z]))))) 189 return AVERROR(ENOMEM); 190 191 return 0; 192} 193 194static int config_props(AVFilterLink *link) 195{ 196 UnsharpContext *unsharp = link->dst->priv; 197 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); 198 int ret; 199 200 unsharp->hsub = desc->log2_chroma_w; 201 unsharp->vsub = desc->log2_chroma_h; 202 203 ret = init_filter_param(link->dst, &unsharp->luma, "luma", link->w); 204 if (ret < 0) 205 return ret; 206 ret = init_filter_param(link->dst, &unsharp->chroma, "chroma", FF_CEIL_RSHIFT(link->w, unsharp->hsub)); 207 if (ret < 0) 208 return ret; 209 210 return 0; 211} 212 213static void free_filter_param(UnsharpFilterParam *fp) 214{ 215 int z; 216 217 for (z = 0; z < 2 * fp->steps_y; z++) 218 av_free(fp->sc[z]); 219} 220 221static av_cold void uninit(AVFilterContext *ctx) 222{ 223 UnsharpContext *unsharp = ctx->priv; 224 225 if (CONFIG_OPENCL && unsharp->opencl) { 226 ff_opencl_unsharp_uninit(ctx); 227 } 228 229 free_filter_param(&unsharp->luma); 230 free_filter_param(&unsharp->chroma); 231} 232 233static int filter_frame(AVFilterLink *link, AVFrame *in) 234{ 235 UnsharpContext *unsharp = link->dst->priv; 236 AVFilterLink *outlink = link->dst->outputs[0]; 237 AVFrame *out; 238 int ret = 0; 239 240 out = ff_get_video_buffer(outlink, outlink->w, outlink->h); 241 if (!out) { 242 av_frame_free(&in); 243 return AVERROR(ENOMEM); 244 } 245 av_frame_copy_props(out, in); 246 if (CONFIG_OPENCL && unsharp->opencl) { 247 ret = ff_opencl_unsharp_process_inout_buf(link->dst, in, out); 248 if (ret < 0) 249 goto end; 250 } 251 252 ret = unsharp->apply_unsharp(link->dst, in, out); 253end: 254 av_frame_free(&in); 255 256 if (ret < 0) 257 return ret; 258 return ff_filter_frame(outlink, out); 259} 260 261#define OFFSET(x) offsetof(UnsharpContext, x) 262#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 263#define MIN_SIZE 3 264#define MAX_SIZE 63 265static const AVOption unsharp_options[] = { 266 { "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 267 { "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 268 { "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 269 { "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 270 { "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, 271 { "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, 272 { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 273 { "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 274 { "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 275 { "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, 276 { "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, 277 { "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, 278 { "opencl", "use OpenCL filtering capabilities", OFFSET(opencl), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, 279 { NULL } 280}; 281 282AVFILTER_DEFINE_CLASS(unsharp); 283 284static const AVFilterPad avfilter_vf_unsharp_inputs[] = { 285 { 286 .name = "default", 287 .type = AVMEDIA_TYPE_VIDEO, 288 .filter_frame = filter_frame, 289 .config_props = config_props, 290 }, 291 { NULL } 292}; 293 294static const AVFilterPad avfilter_vf_unsharp_outputs[] = { 295 { 296 .name = "default", 297 .type = AVMEDIA_TYPE_VIDEO, 298 }, 299 { NULL } 300}; 301 302AVFilter ff_vf_unsharp = { 303 .name = "unsharp", 304 .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), 305 .priv_size = sizeof(UnsharpContext), 306 .priv_class = &unsharp_class, 307 .init = init, 308 .uninit = uninit, 309 .query_formats = query_formats, 310 .inputs = avfilter_vf_unsharp_inputs, 311 .outputs = avfilter_vf_unsharp_outputs, 312 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, 313}; 314