blob: 438ff6d8fb2193fd221c4d5fe6b1b8ca5ffc74df
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 *s = 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] = AV_CEIL_RSHIFT(inlink->w, s->hsub); |
113 | plane_h[0] = inlink->h; |
114 | plane_h[1] = plane_h[2] = AV_CEIL_RSHIFT(inlink->h, s->vsub); |
115 | fp[0] = &s->luma; |
116 | fp[1] = fp[2] = &s->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 *s = ctx->priv; |
139 | |
140 | |
141 | set_filter_param(&s->luma, s->lmsize_x, s->lmsize_y, s->lamount); |
142 | set_filter_param(&s->chroma, s->cmsize_x, s->cmsize_y, s->camount); |
143 | |
144 | if (s->luma.scalebits >= 26 || s->chroma.scalebits >= 26) { |
145 | av_log(ctx, AV_LOG_ERROR, "luma or chroma matrix size too big\n"); |
146 | return AVERROR(EINVAL); |
147 | } |
148 | s->apply_unsharp = apply_unsharp_c; |
149 | if (!CONFIG_OPENCL && s->opencl) { |
150 | av_log(ctx, AV_LOG_ERROR, "OpenCL support was not enabled in this build, cannot be selected\n"); |
151 | return AVERROR(EINVAL); |
152 | } |
153 | if (CONFIG_OPENCL && s->opencl) { |
154 | s->apply_unsharp = ff_opencl_apply_unsharp; |
155 | ret = ff_opencl_unsharp_init(ctx); |
156 | if (ret < 0) |
157 | return ret; |
158 | } |
159 | return 0; |
160 | } |
161 | |
162 | static int query_formats(AVFilterContext *ctx) |
163 | { |
164 | static const enum AVPixelFormat pix_fmts[] = { |
165 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV410P, |
166 | AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
167 | AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_NONE |
168 | }; |
169 | |
170 | AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
171 | if (!fmts_list) |
172 | return AVERROR(ENOMEM); |
173 | return ff_set_common_formats(ctx, fmts_list); |
174 | } |
175 | |
176 | static int init_filter_param(AVFilterContext *ctx, UnsharpFilterParam *fp, const char *effect_type, int width) |
177 | { |
178 | int z; |
179 | const char *effect = fp->amount == 0 ? "none" : fp->amount < 0 ? "blur" : "sharpen"; |
180 | |
181 | if (!(fp->msize_x & fp->msize_y & 1)) { |
182 | av_log(ctx, AV_LOG_ERROR, |
183 | "Invalid even size for %s matrix size %dx%d\n", |
184 | effect_type, fp->msize_x, fp->msize_y); |
185 | return AVERROR(EINVAL); |
186 | } |
187 | |
188 | av_log(ctx, AV_LOG_VERBOSE, "effect:%s type:%s msize_x:%d msize_y:%d amount:%0.2f\n", |
189 | effect, effect_type, fp->msize_x, fp->msize_y, fp->amount / 65535.0); |
190 | |
191 | for (z = 0; z < 2 * fp->steps_y; z++) |
192 | if (!(fp->sc[z] = av_malloc_array(width + 2 * fp->steps_x, |
193 | sizeof(*(fp->sc[z]))))) |
194 | return AVERROR(ENOMEM); |
195 | |
196 | return 0; |
197 | } |
198 | |
199 | static int config_props(AVFilterLink *link) |
200 | { |
201 | UnsharpContext *s = link->dst->priv; |
202 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
203 | int ret; |
204 | |
205 | s->hsub = desc->log2_chroma_w; |
206 | s->vsub = desc->log2_chroma_h; |
207 | |
208 | ret = init_filter_param(link->dst, &s->luma, "luma", link->w); |
209 | if (ret < 0) |
210 | return ret; |
211 | ret = init_filter_param(link->dst, &s->chroma, "chroma", AV_CEIL_RSHIFT(link->w, s->hsub)); |
212 | if (ret < 0) |
213 | return ret; |
214 | |
215 | return 0; |
216 | } |
217 | |
218 | static void free_filter_param(UnsharpFilterParam *fp) |
219 | { |
220 | int z; |
221 | |
222 | for (z = 0; z < 2 * fp->steps_y; z++) |
223 | av_freep(&fp->sc[z]); |
224 | } |
225 | |
226 | static av_cold void uninit(AVFilterContext *ctx) |
227 | { |
228 | UnsharpContext *s = ctx->priv; |
229 | |
230 | if (CONFIG_OPENCL && s->opencl) { |
231 | ff_opencl_unsharp_uninit(ctx); |
232 | } |
233 | |
234 | free_filter_param(&s->luma); |
235 | free_filter_param(&s->chroma); |
236 | } |
237 | |
238 | static int filter_frame(AVFilterLink *link, AVFrame *in) |
239 | { |
240 | UnsharpContext *s = link->dst->priv; |
241 | AVFilterLink *outlink = link->dst->outputs[0]; |
242 | AVFrame *out; |
243 | int ret = 0; |
244 | |
245 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
246 | if (!out) { |
247 | av_frame_free(&in); |
248 | return AVERROR(ENOMEM); |
249 | } |
250 | av_frame_copy_props(out, in); |
251 | if (CONFIG_OPENCL && s->opencl) { |
252 | ret = ff_opencl_unsharp_process_inout_buf(link->dst, in, out); |
253 | if (ret < 0) |
254 | goto end; |
255 | } |
256 | |
257 | ret = s->apply_unsharp(link->dst, in, out); |
258 | end: |
259 | av_frame_free(&in); |
260 | |
261 | if (ret < 0) { |
262 | av_frame_free(&out); |
263 | return ret; |
264 | } |
265 | return ff_filter_frame(outlink, out); |
266 | } |
267 | |
268 | #define OFFSET(x) offsetof(UnsharpContext, x) |
269 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
270 | #define MIN_SIZE 3 |
271 | #define MAX_SIZE 23 |
272 | static const AVOption unsharp_options[] = { |
273 | { "luma_msize_x", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
274 | { "lx", "set luma matrix horizontal size", OFFSET(lmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
275 | { "luma_msize_y", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
276 | { "ly", "set luma matrix vertical size", OFFSET(lmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
277 | { "luma_amount", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
278 | { "la", "set luma effect strength", OFFSET(lamount), AV_OPT_TYPE_FLOAT, { .dbl = 1 }, -2, 5, FLAGS }, |
279 | { "chroma_msize_x", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
280 | { "cx", "set chroma matrix horizontal size", OFFSET(cmsize_x), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
281 | { "chroma_msize_y", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
282 | { "cy", "set chroma matrix vertical size", OFFSET(cmsize_y), AV_OPT_TYPE_INT, { .i64 = 5 }, MIN_SIZE, MAX_SIZE, FLAGS }, |
283 | { "chroma_amount", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
284 | { "ca", "set chroma effect strength", OFFSET(camount), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, -2, 5, FLAGS }, |
285 | { "opencl", "use OpenCL filtering capabilities", OFFSET(opencl), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, |
286 | { NULL } |
287 | }; |
288 | |
289 | AVFILTER_DEFINE_CLASS(unsharp); |
290 | |
291 | static const AVFilterPad avfilter_vf_unsharp_inputs[] = { |
292 | { |
293 | .name = "default", |
294 | .type = AVMEDIA_TYPE_VIDEO, |
295 | .filter_frame = filter_frame, |
296 | .config_props = config_props, |
297 | }, |
298 | { NULL } |
299 | }; |
300 | |
301 | static const AVFilterPad avfilter_vf_unsharp_outputs[] = { |
302 | { |
303 | .name = "default", |
304 | .type = AVMEDIA_TYPE_VIDEO, |
305 | }, |
306 | { NULL } |
307 | }; |
308 | |
309 | AVFilter ff_vf_unsharp = { |
310 | .name = "unsharp", |
311 | .description = NULL_IF_CONFIG_SMALL("Sharpen or blur the input video."), |
312 | .priv_size = sizeof(UnsharpContext), |
313 | .priv_class = &unsharp_class, |
314 | .init = init, |
315 | .uninit = uninit, |
316 | .query_formats = query_formats, |
317 | .inputs = avfilter_vf_unsharp_inputs, |
318 | .outputs = avfilter_vf_unsharp_outputs, |
319 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
320 | }; |
321 |