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avfilter: add pixelize video filter

Paul B Mahol committed 4 years ago

Commit 391ce571 parent 7e812956 files · +384 −1Browse files

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6 files
  1. Changelog +1 −0
  2. doc/filters.texi +29 −0
  3. libavfilter/Makefile +1 −0
  4. libavfilter/allfilters.c +1 −0
  5. libavfilter/version.h +1 −1
  6. libavfilter/vf_pixelize.c +351 −0
Changelog+1−0
@@ -10,6 +10,7 @@ version 5.1: · 9 unmodified lines
1010 - Vizrt Binary Image encoder/decoder
1111 - avsynctest source filter
1212 - feedback video filter
13+- pixelize video filter
1314
1415
1516 version 5.0:
doc/filters.texi+29−0
@@ -17863,6 +17863,35 @@ format=monow, pixdesctest · 17862 unmodified lines
1786317863
1786417864 can be used to test the monowhite pixel format descriptor definition.
1786517865
17866+@section pixelize
17867+Apply pixelization to video stream.
17868+
17869+The filter accepts the following options:
17870+@table @option
17871+@item width, w
17872+@item height, h
17873+Set block dimensions that will be used for pixelization.
17874+Default value is @code{16}.
17875+
17876+@item mode, m
17877+Set the mode of pixelization used.
17878+
17879+Possible values are:
17880+@table @samp
17881+@item avg
17882+@item min
17883+@item max
17884+@end table
17885+Default value is @code{avg}.
17886+
17887+@item planes, p
17888+Set what planes to filter. Default is to filter all planes.
17889+@end table
17890+
17891+@subsection Commands
17892+
17893+This filter supports all options as @ref{commands}.
17894+
1786617895 @section pixscope
1786717896
1786817897 Display sample values of color channels. Mainly useful for checking color
libavfilter/Makefile+1−0
@@ -391,6 +391,7 @@ OBJS-$(CONFIG_PERSPECTIVE_FILTER) += vf_perspective.o · 390 unmodified lines
391391 OBJS-$(CONFIG_PHASE_FILTER) += vf_phase.o
392392 OBJS-$(CONFIG_PHOTOSENSITIVITY_FILTER) += vf_photosensitivity.o
393393 OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
394+OBJS-$(CONFIG_PIXELIZE_FILTER) += vf_pixelize.o
394395 OBJS-$(CONFIG_PIXSCOPE_FILTER) += vf_datascope.o
395396 OBJS-$(CONFIG_PP_FILTER) += vf_pp.o qp_table.o
396397 OBJS-$(CONFIG_PP7_FILTER) += vf_pp7.o qp_table.o
libavfilter/allfilters.c+1−0
@@ -373,6 +373,7 @@ extern const AVFilter ff_vf_perspective; · 372 unmodified lines
373373 extern const AVFilter ff_vf_phase;
374374 extern const AVFilter ff_vf_photosensitivity;
375375 extern const AVFilter ff_vf_pixdesctest;
376+extern const AVFilter ff_vf_pixelize;
376377 extern const AVFilter ff_vf_pixscope;
377378 extern const AVFilter ff_vf_pp;
378379 extern const AVFilter ff_vf_pp7;
libavfilter/version.h+1−1
@@ -31,7 +31,7 @@ · 30 unmodified lines
3131
3232 #include "version_major.h"
3333
34−#define LIBAVFILTER_VERSION_MINOR 32
34+#define LIBAVFILTER_VERSION_MINOR 33
3535 #define LIBAVFILTER_VERSION_MICRO 100
3636
3737
libavfilter/vf_pixelize.c+351−0
@@ -0,0 +1,351 @@
1+/*
2+ * Copyright (c) 2022 Paul B Mahol
3+ *
4+ * This file is part of FFmpeg.
5+ *
6+ * FFmpeg is free software; you can redistribute it and/or
7+ * modify it under the terms of the GNU Lesser General Public
8+ * License as published by the Free Software Foundation; either
9+ * version 2.1 of the License, or (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 GNU
14+ * Lesser General Public License for more details.
15+ *
16+ * You should have received a copy of the GNU Lesser General Public
17+ * License along with FFmpeg; if not, write to the Free Software
18+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19+ */
20+
21+#include "libavutil/common.h"
22+#include "libavutil/internal.h"
23+#include "libavutil/imgutils.h"
24+#include "libavutil/opt.h"
25+
26+#include "avfilter.h"
27+#include "internal.h"
28+#include "video.h"
29+
30+enum PixelizeModes {
31+ PIXELIZE_AVG,
32+ PIXELIZE_MIN,
33+ PIXELIZE_MAX,
34+ PIXELIZE_MODES
35+};
36+
37+typedef struct PixelizeContext {
38+ const AVClass *class;
39+
40+ int block_w[4], block_h[4];
41+ int mode;
42+
43+ int depth;
44+ int planes;
45+ int nb_planes;
46+ int linesize[4];
47+ int planewidth[4];
48+ int planeheight[4];
49+
50+ int log2_chroma_w;
51+ int log2_chroma_h;
52+
53+ int (*pixelize[PIXELIZE_MODES])(const uint8_t *src, uint8_t *dst,
54+ ptrdiff_t src_linesize,
55+ ptrdiff_t dst_linesize,
56+ int w, int h);
57+} PixelizeContext;
58+
59+static const enum AVPixelFormat pix_fmts[] = {
60+ AV_PIX_FMT_GRAY8,
61+ AV_PIX_FMT_GRAY9,
62+ AV_PIX_FMT_GRAY10,
63+ AV_PIX_FMT_GRAY12,
64+ AV_PIX_FMT_GRAY14,
65+ AV_PIX_FMT_GRAY16,
66+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
67+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
68+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
69+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
70+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
71+ AV_PIX_FMT_YUVJ411P,
72+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
73+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
74+ AV_PIX_FMT_YUV440P10,
75+ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
76+ AV_PIX_FMT_YUV440P12,
77+ AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
78+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
79+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
80+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
81+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
82+ AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
83+ AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
84+ AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
85+ AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
86+ AV_PIX_FMT_NONE
87+};
88+
89+typedef struct ThreadData {
90+ AVFrame *in, *out;
91+} ThreadData;
92+
93+#define PIXELIZE_AVG(name, type, stype) \
94+static int pixelize_avg##name(const uint8_t *ssrc, uint8_t *ddst, \
95+ ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
96+ int w, int h) \
97+{ \
98+ const type *src = (const type *)ssrc; \
99+ type *dst = (type *)ddst; \
100+ stype sum = 0; \
101+ type fill; \
102+ for (int y = 0; y < h; y++) { \
103+ for (int x = 0; x < w; x++) \
104+ sum += src[x]; \
105+ \
106+ src += src_linesize / sizeof(type); \
107+ } \
108+ \
109+ fill = sum / (w * h); \
110+ \
111+ for (int y = 0; y < h; y++) { \
112+ for (int x = 0; x < w; x++) \
113+ dst[x] = fill; \
114+ \
115+ dst += dst_linesize / sizeof(type); \
116+ } \
117+ \
118+ return 0; \
119+}
120+
121+#define PIXELIZE_MIN(name, type, stype) \
122+static int pixelize_min##name(const uint8_t *ssrc, uint8_t *ddst, \
123+ ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
124+ int w, int h) \
125+{ \
126+ const type *src = (const type *)ssrc; \
127+ type *dst = (type *)ddst; \
128+ type fill = src[0]; \
129+ \
130+ for (int y = 0; y < h; y++) { \
131+ for (int x = 0; x < w; x++) \
132+ fill = FFMIN(src[x], fill); \
133+ \
134+ src += src_linesize / sizeof(type); \
135+ } \
136+ \
137+ for (int y = 0; y < h; y++) { \
138+ for (int x = 0; x < w; x++) \
139+ dst[x] = fill; \
140+ \
141+ dst += dst_linesize / sizeof(type); \
142+ } \
143+ \
144+ return 0; \
145+}
146+
147+#define PIXELIZE_MAX(name, type, stype) \
148+static int pixelize_max##name(const uint8_t *ssrc, uint8_t *ddst, \
149+ ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
150+ int w, int h) \
151+{ \
152+ const type *src = (const type *)ssrc; \
153+ type *dst = (type *)ddst; \
154+ type fill = src[0]; \
155+ \
156+ for (int y = 0; y < h; y++) { \
157+ for (int x = 0; x < w; x++) \
158+ fill = FFMAX(src[x], fill); \
159+ \
160+ src += src_linesize / sizeof(type); \
161+ } \
162+ \
163+ for (int y = 0; y < h; y++) { \
164+ for (int x = 0; x < w; x++) \
165+ dst[x] = fill; \
166+ \
167+ dst += dst_linesize / sizeof(type); \
168+ } \
169+ \
170+ return 0; \
171+}
172+
173+PIXELIZE_AVG(8, uint8_t, unsigned)
174+PIXELIZE_AVG(16, uint16_t, uint64_t)
175+PIXELIZE_MIN(8, uint8_t, unsigned)
176+PIXELIZE_MIN(16, uint16_t, uint64_t)
177+PIXELIZE_MAX(8, uint8_t, unsigned)
178+PIXELIZE_MAX(16, uint16_t, uint64_t)
179+
180+static int pixelize_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
181+{
182+ PixelizeContext *s = ctx->priv;
183+ const int mode = s->mode;
184+ ThreadData *td = arg;
185+ AVFrame *out = td->out;
186+ AVFrame *in = td->in;
187+
188+ for (int p = 0; p < s->nb_planes; p++) {
189+ const int wh = s->planeheight[p];
190+ const int h = (s->planeheight[p] + s->block_h[p] - 1) / s->block_h[p];
191+ const int w = (s->planewidth[p] + s->block_w[p] - 1) / s->block_w[p];
192+ const int wslice_start = (wh * jobnr) / nb_jobs;
193+ const int wslice_end = (wh * (jobnr+1)) / nb_jobs;
194+ const int slice_start = (h * jobnr) / nb_jobs;
195+ const int slice_end = (h * (jobnr+1)) / nb_jobs;
196+ const ptrdiff_t out_linesize = out->linesize[p];
197+ const ptrdiff_t in_linesize = in->linesize[p];
198+ const uint8_t *src = in->data[p];
199+ uint8_t *dst = out->data[p];
200+
201+ if (!((1 << p) & s->planes)) {
202+ av_image_copy_plane(dst + wslice_start * out_linesize,
203+ out_linesize,
204+ src + wslice_start * in_linesize,
205+ in_linesize,
206+ s->linesize[p], wslice_end - wslice_start);
207+ continue;
208+ }
209+
210+ for (int y = slice_start; y < slice_end; y++) {
211+ const int block_h = FFMIN(s->block_h[p], s->planeheight[p] - y * s->block_h[p]);
212+ for (int x = 0; x < w; x++) {
213+ const int block_w = FFMIN(s->block_w[p], s->planewidth[p] - x * s->block_w[p]);
214+
215+ s->pixelize[mode](src + s->block_h[p] * y * in_linesize +
216+ x * s->block_w[p] * (1 + (s->depth > 8)),
217+ dst + s->block_h[p] * y * out_linesize +
218+ x * s->block_w[p] * (1 + (s->depth > 8)),
219+ in_linesize, out_linesize, block_w, block_h);
220+ }
221+ }
222+ }
223+
224+ return 0;
225+}
226+
227+static int config_output(AVFilterLink *outlink)
228+{
229+ AVFilterContext *ctx = outlink->src;
230+ PixelizeContext *s = ctx->priv;
231+ AVFilterLink *inlink = ctx->inputs[0];
232+ const AVPixFmtDescriptor *desc;
233+ int ret;
234+
235+ desc = av_pix_fmt_desc_get(outlink->format);
236+ if (!desc)
237+ return AVERROR_BUG;
238+ s->nb_planes = av_pix_fmt_count_planes(outlink->format);
239+ s->depth = desc->comp[0].depth;
240+
241+ if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
242+ return ret;
243+
244+ s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
245+ s->planewidth[0] = s->planewidth[3] = inlink->w;
246+
247+ s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
248+ s->planeheight[0] = s->planeheight[3] = inlink->h;
249+
250+ s->log2_chroma_w = desc->log2_chroma_w;
251+ s->log2_chroma_h = desc->log2_chroma_h;
252+
253+ s->pixelize[PIXELIZE_AVG] = s->depth <= 8 ? pixelize_avg8 : pixelize_avg16;
254+ s->pixelize[PIXELIZE_MIN] = s->depth <= 8 ? pixelize_min8 : pixelize_min16;
255+ s->pixelize[PIXELIZE_MAX] = s->depth <= 8 ? pixelize_max8 : pixelize_max16;
256+
257+ return 0;
258+}
259+
260+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
261+{
262+ AVFilterContext *ctx = inlink->dst;
263+ AVFilterLink *outlink = ctx->outputs[0];
264+ PixelizeContext *s = ctx->priv;
265+ ThreadData td;
266+ AVFrame *out;
267+ int ret;
268+
269+ s->block_w[1] = s->block_w[2] = FFMAX(1, s->block_w[0] >> s->log2_chroma_w);
270+ s->block_w[3] = s->block_w[0] = s->block_w[1] << s->log2_chroma_w;
271+
272+ s->block_h[1] = s->block_h[2] = FFMAX(1, s->block_h[0] >> s->log2_chroma_h);
273+ s->block_h[3] = s->block_h[0] = s->block_h[1] << s->log2_chroma_h;
274+
275+ if (av_frame_is_writable(in)) {
276+ out = in;
277+ } else {
278+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
279+ if (!out) {
280+ ret = AVERROR(ENOMEM);
281+ goto fail;
282+ }
283+
284+ ret = av_frame_copy_props(out, in);
285+ if (ret < 0) {
286+ av_frame_free(&out);
287+ goto fail;
288+ }
289+ }
290+
291+ td.out = out;
292+ td.in = in;
293+ ff_filter_execute(ctx, pixelize_slice, &td, NULL,
294+ FFMIN((s->planeheight[1] + s->block_h[1] - 1) / s->block_h[1],
295+ ff_filter_get_nb_threads(ctx)));
296+
297+ if (out != in)
298+ av_frame_free(&in);
299+ return ff_filter_frame(outlink, out);
300+fail:
301+ av_frame_free(&in);
302+ return ret;
303+}
304+
305+#define OFFSET(x) offsetof(PixelizeContext, x)
306+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM)
307+
308+static const AVOption pixelize_options[] = {
309+ { "width", "set block width", OFFSET(block_w[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
310+ { "w", "set block width", OFFSET(block_w[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
311+ { "height", "set block height", OFFSET(block_h[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
312+ { "h", "set block height", OFFSET(block_h[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
313+ { "mode", "set the pixelize mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, PIXELIZE_MODES-1, FLAGS, "mode" },
314+ { "m", "set the pixelize mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, PIXELIZE_MODES-1, FLAGS, "mode" },
315+ { "avg", "average", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_AVG}, 0, 0, FLAGS, "mode" },
316+ { "min", "minimum", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_MIN}, 0, 0, FLAGS, "mode" },
317+ { "max", "maximum", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_MAX}, 0, 0, FLAGS, "mode" },
318+ { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
319+ { "p", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
320+ { NULL },
321+};
322+
323+AVFILTER_DEFINE_CLASS(pixelize);
324+
325+static const AVFilterPad pixelize_inputs[] = {
326+ {
327+ .name = "default",
328+ .type = AVMEDIA_TYPE_VIDEO,
329+ .filter_frame = filter_frame,
330+ },
331+};
332+
333+static const AVFilterPad pixelize_outputs[] = {
334+ {
335+ .name = "default",
336+ .type = AVMEDIA_TYPE_VIDEO,
337+ .config_props = config_output,
338+ },
339+};
340+
341+const AVFilter ff_vf_pixelize = {
342+ .name = "pixelize",
343+ .description = NULL_IF_CONFIG_SMALL("Pixelize video."),
344+ .priv_size = sizeof(PixelizeContext),
345+ .priv_class = &pixelize_class,
346+ FILTER_INPUTS(pixelize_inputs),
347+ FILTER_OUTPUTS(pixelize_outputs),
348+ FILTER_PIXFMTS_ARRAY(pix_fmts),
349+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
350+ .process_command = ff_filter_process_command,
351+};

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