| 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 | |
| 51 | static 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 | |
| 105 | static 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 | |
| 123 | static 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 | |
| 135 | static 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 | |
| 158 | static 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 | |
| 171 | static 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 | |
| 194 | static 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 | |
| 213 | static 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 | |
| 221 | static 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 | |
| 233 | static 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); |
| 253 | end: |
| 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 |
| 265 | static 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 | |
| 282 | AVFILTER_DEFINE_CLASS(unsharp); |
| 283 | |
| 284 | static 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 | |
| 294 | static const AVFilterPad avfilter_vf_unsharp_outputs[] = { |
| 295 | { |
| 296 | .name = "default", |
| 297 | .type = AVMEDIA_TYPE_VIDEO, |
| 298 | }, |
| 299 | { NULL } |
| 300 | }; |
| 301 | |
| 302 | AVFilter 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 | }; |