1 /*
2 * Copyright (c) 2014-2015 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 /**
22 * @todo switch to dualinput
23 */
24
25 #include "libavutil/avassert.h"
26 #include "libavutil/imgutils.h"
27 #include "libavutil/opt.h"
28 #include "internal.h"
29
30 #include "lavfutils.h"
31
32 enum mode {
33 MODE_COVER,
34 MODE_BLUR,
35 NB_MODES
36 };
37
38 typedef struct CoverContext {
39 AVClass *class;
40 int mode;
41 char *cover_filename;
42 AVFrame *cover_frame;
43 int width, height;
44 } CoverContext;
45
46 #define OFFSET(x) offsetof(CoverContext, x)
47 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
48 static const AVOption cover_rect_options[] = {
49 { "cover", "cover bitmap filename", OFFSET(cover_filename), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
50 { "mode", "set removal mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_BLUR}, 0, NB_MODES - 1, FLAGS, "mode" },
51 { "cover", "cover area with bitmap", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_COVER}, INT_MIN, INT_MAX, FLAGS, "mode" },
52 { "blur", "blur area", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_BLUR}, INT_MIN, INT_MAX, FLAGS, "mode" },
53 { NULL }
54 };
55
56 AVFILTER_DEFINE_CLASS(cover_rect);
57
query_formats(AVFilterContext * ctx)58 static int query_formats(AVFilterContext *ctx)
59 {
60 static const enum AVPixelFormat pix_fmts[] = {
61 AV_PIX_FMT_YUV420P,
62 AV_PIX_FMT_YUVJ420P,
63 AV_PIX_FMT_NONE
64 };
65
66 return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
67 }
68
config_input(AVFilterLink * inlink)69 static int config_input(AVFilterLink *inlink)
70 {
71 return 0;
72 }
73
cover_rect(CoverContext * cover,AVFrame * in,int offx,int offy)74 static void cover_rect(CoverContext *cover, AVFrame *in, int offx, int offy)
75 {
76 int x, y, p;
77
78 for (p = 0; p < 3; p++) {
79 uint8_t *data = in->data[p] + (offx>>!!p) + (offy>>!!p) * in->linesize[p];
80 const uint8_t *src = cover->cover_frame->data[p];
81 int w = AV_CEIL_RSHIFT(cover->cover_frame->width , !!p);
82 int h = AV_CEIL_RSHIFT(cover->cover_frame->height, !!p);
83 for (y = 0; y < h; y++) {
84 for (x = 0; x < w; x++) {
85 data[x] = src[x];
86 }
87 data += in->linesize[p];
88 src += cover->cover_frame->linesize[p];
89 }
90 }
91 }
blur(CoverContext * cover,AVFrame * in,int offx,int offy)92 static void blur(CoverContext *cover, AVFrame *in, int offx, int offy)
93 {
94 int x, y, p;
95
96 for (p=0; p<3; p++) {
97 int ox = offx>>!!p;
98 int oy = offy>>!!p;
99 int stride = in->linesize[p];
100 uint8_t *data = in->data[p] + ox + oy * stride;
101 int w = AV_CEIL_RSHIFT(cover->width , !!p);
102 int h = AV_CEIL_RSHIFT(cover->height, !!p);
103 int iw = AV_CEIL_RSHIFT(in->width , !!p);
104 int ih = AV_CEIL_RSHIFT(in->height, !!p);
105 for (y = 0; y < h; y++) {
106 for (x = 0; x < w; x++) {
107 int c = 0;
108 int s = 0;
109 if (ox) {
110 int scale = 65536 / (x + 1);
111 s += data[-1 + y*stride] * scale;
112 c += scale;
113 }
114 if (oy) {
115 int scale = 65536 / (y + 1);
116 s += data[x - stride] * scale;
117 c += scale;
118 }
119 if (ox + w < iw) {
120 int scale = 65536 / (w - x);
121 s += data[w + y*stride] * scale;
122 c += scale;
123 }
124 if (oy + h < ih) {
125 int scale = 65536 / (h - y);
126 s += data[x + h*stride] * scale;
127 c += scale;
128 }
129 data[x + y*stride] = c ? (s + (c>>1)) / c : 0;
130 }
131 }
132 }
133 }
134
filter_frame(AVFilterLink * inlink,AVFrame * in)135 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
136 {
137 AVFilterContext *ctx = inlink->dst;
138 CoverContext *cover = ctx->priv;
139 AVDictionaryEntry *ex, *ey, *ew, *eh;
140 int x = -1, y = -1, w = -1, h = -1;
141 char *xendptr = NULL, *yendptr = NULL, *wendptr = NULL, *hendptr = NULL;
142
143 ex = av_dict_get(in->metadata, "lavfi.rect.x", NULL, AV_DICT_MATCH_CASE);
144 ey = av_dict_get(in->metadata, "lavfi.rect.y", NULL, AV_DICT_MATCH_CASE);
145 ew = av_dict_get(in->metadata, "lavfi.rect.w", NULL, AV_DICT_MATCH_CASE);
146 eh = av_dict_get(in->metadata, "lavfi.rect.h", NULL, AV_DICT_MATCH_CASE);
147 if (ex && ey && ew && eh) {
148 x = strtol(ex->value, &xendptr, 10);
149 y = strtol(ey->value, ¥dptr, 10);
150 w = strtol(ew->value, &wendptr, 10);
151 h = strtol(eh->value, &hendptr, 10);
152 }
153
154 if (!xendptr || *xendptr || !yendptr || *yendptr ||
155 !wendptr || *wendptr || !hendptr || *hendptr
156 ) {
157 return ff_filter_frame(ctx->outputs[0], in);
158 }
159
160 if (x < 0) {
161 w += x;
162 x = 0;
163 }
164 if (y < 0) {
165 h += y;
166 y = 0;
167 }
168 w = FFMIN(w, in->width - x);
169 h = FFMIN(h, in->height - y);
170
171 if (w > in->width || h > in->height || w <= 0 || h <= 0)
172 return AVERROR(EINVAL);
173
174 if (cover->cover_frame) {
175 if (w != cover->cover_frame->width || h != cover->cover_frame->height)
176 return AVERROR(EINVAL);
177 }
178
179 cover->width = w;
180 cover->height = h;
181
182 x = av_clip(x, 0, in->width - w);
183 y = av_clip(y, 0, in->height - h);
184
185 av_frame_make_writable(in);
186
187 if (cover->mode == MODE_BLUR) {
188 blur (cover, in, x, y);
189 } else {
190 cover_rect(cover, in, x, y);
191 }
192 return ff_filter_frame(ctx->outputs[0], in);
193 }
194
uninit(AVFilterContext * ctx)195 static av_cold void uninit(AVFilterContext *ctx)
196 {
197 CoverContext *cover = ctx->priv;
198
199 if (cover->cover_frame)
200 av_freep(&cover->cover_frame->data[0]);
201 av_frame_free(&cover->cover_frame);
202 }
203
init(AVFilterContext * ctx)204 static av_cold int init(AVFilterContext *ctx)
205 {
206 CoverContext *cover = ctx->priv;
207 int ret;
208
209 if (cover->mode == MODE_COVER) {
210 if (!cover->cover_filename) {
211 av_log(ctx, AV_LOG_ERROR, "cover filename not set\n");
212 return AVERROR(EINVAL);
213 }
214
215 cover->cover_frame = av_frame_alloc();
216 if (!cover->cover_frame)
217 return AVERROR(ENOMEM);
218
219 if ((ret = ff_load_image(cover->cover_frame->data, cover->cover_frame->linesize,
220 &cover->cover_frame->width, &cover->cover_frame->height,
221 &cover->cover_frame->format, cover->cover_filename, ctx)) < 0)
222 return ret;
223
224 if (cover->cover_frame->format != AV_PIX_FMT_YUV420P && cover->cover_frame->format != AV_PIX_FMT_YUVJ420P) {
225 av_log(ctx, AV_LOG_ERROR, "cover image is not a YUV420 image\n");
226 return AVERROR(EINVAL);
227 }
228 }
229
230 return 0;
231 }
232
233 static const AVFilterPad cover_rect_inputs[] = {
234 {
235 .name = "default",
236 .type = AVMEDIA_TYPE_VIDEO,
237 .config_props = config_input,
238 .filter_frame = filter_frame,
239 },
240 { NULL }
241 };
242
243 static const AVFilterPad cover_rect_outputs[] = {
244 {
245 .name = "default",
246 .type = AVMEDIA_TYPE_VIDEO,
247 },
248 { NULL }
249 };
250
251 AVFilter ff_vf_cover_rect = {
252 .name = "cover_rect",
253 .description = NULL_IF_CONFIG_SMALL("Find and cover a user specified object."),
254 .priv_size = sizeof(CoverContext),
255 .init = init,
256 .uninit = uninit,
257 .query_formats = query_formats,
258 .inputs = cover_rect_inputs,
259 .outputs = cover_rect_outputs,
260 .priv_class = &cover_rect_class,
261 };
262