FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3			* Copyright (c) 2012 Jeremy Tran
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License along
18			* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20			*/
21
22			/**
23			* @file
24			* Apply a smartblur filter to the input video
25			* Ported from MPlayer libmpcodecs/vf_smartblur.c by Michael Niedermayer.
26			*/
27
28			#include "libavutil/opt.h"
29			#include "libavutil/pixdesc.h"
30			#include "libswscale/swscale.h"
31
32			#include "avfilter.h"
33			#include "internal.h"
34			#include "video.h"
35
36			#define RADIUS_MIN 0.1
37			#define RADIUS_MAX 5.0
38
39			#define STRENGTH_MIN -1.0
40			#define STRENGTH_MAX 1.0
41
42			#define THRESHOLD_MIN -30
43			#define THRESHOLD_MAX 30
44
45			typedef struct FilterParam {
46			float radius;
47			float strength;
48			int threshold;
49			float quality;
50			struct SwsContext *filter_context;
51			} FilterParam;
52
53			typedef struct SmartblurContext {
54			const AVClass *class;
55			FilterParam luma;
56			FilterParam chroma;
57			int hsub;
58			int vsub;
59			unsigned int sws_flags;
60			} SmartblurContext;
61
62			#define OFFSET(x) offsetof(SmartblurContext, x)
63			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
64
65			static const AVOption smartblur_options[] = {
66			{ "luma_radius", "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
67			{ "lr" , "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
68			{ "luma_strength", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
69			{ "ls", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
70			{ "luma_threshold", "set luma threshold", OFFSET(luma.threshold), AV_OPT_TYPE_INT, {.i64=0}, THRESHOLD_MIN, THRESHOLD_MAX, .flags=FLAGS },
71			{ "lt", "set luma threshold", OFFSET(luma.threshold), AV_OPT_TYPE_INT, {.i64=0}, THRESHOLD_MIN, THRESHOLD_MAX, .flags=FLAGS },
72
73			{ "chroma_radius", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
74			{ "cr", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
75			{ "chroma_strength", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
76			{ "cs", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
77			{ "chroma_threshold", "set chroma threshold", OFFSET(chroma.threshold), AV_OPT_TYPE_INT, {.i64=THRESHOLD_MIN-1}, THRESHOLD_MIN-1, THRESHOLD_MAX, .flags=FLAGS },
78			{ "ct", "set chroma threshold", OFFSET(chroma.threshold), AV_OPT_TYPE_INT, {.i64=THRESHOLD_MIN-1}, THRESHOLD_MIN-1, THRESHOLD_MAX, .flags=FLAGS },
79
80			{ NULL }
81			};
82
83			AVFILTER_DEFINE_CLASS(smartblur);
84
85		✗	static av_cold int init(AVFilterContext *ctx)
86			{
87		✗	SmartblurContext *s = ctx->priv;
88
89			/* make chroma default to luma values, if not explicitly set */
90		✗	if (s->chroma.radius < RADIUS_MIN)
91		✗	s->chroma.radius = s->luma.radius;
92		✗	if (s->chroma.strength < STRENGTH_MIN)
93		✗	s->chroma.strength = s->luma.strength;
94		✗	if (s->chroma.threshold < THRESHOLD_MIN)
95		✗	s->chroma.threshold = s->luma.threshold;
96
97		✗	s->luma.quality = s->chroma.quality = 3.0;
98		✗	s->sws_flags = SWS_BICUBIC;
99
100		✗	av_log(ctx, AV_LOG_VERBOSE,
101			"luma_radius:%f luma_strength:%f luma_threshold:%d "
102			"chroma_radius:%f chroma_strength:%f chroma_threshold:%d\n",
103		✗	s->luma.radius, s->luma.strength, s->luma.threshold,
104		✗	s->chroma.radius, s->chroma.strength, s->chroma.threshold);
105
106		✗	return 0;
107			}
108
109		✗	static av_cold void uninit(AVFilterContext *ctx)
110			{
111		✗	SmartblurContext *s = ctx->priv;
112
113		✗	sws_freeContext(s->luma.filter_context);
114		✗	sws_freeContext(s->chroma.filter_context);
115		✗	}
116
117			static const enum AVPixelFormat pix_fmts[] = {
118			AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
119			AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
120			AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
121			AV_PIX_FMT_GRAY8,
122			AV_PIX_FMT_NONE
123			};
124
125		✗	static int alloc_sws_context(FilterParam *f, int width, int height, unsigned int flags)
126			{
127			SwsVector *vec;
128			SwsFilter sws_filter;
129
130		✗	vec = sws_getGaussianVec(f->radius, f->quality);
131
132		✗	if (!vec)
133		✗	return AVERROR(EINVAL);
134
135		✗	sws_scaleVec(vec, f->strength);
136		✗	vec->coeff[vec->length / 2] += 1.0 - f->strength;
137		✗	sws_filter.lumH = sws_filter.lumV = vec;
138		✗	sws_filter.chrH = sws_filter.chrV = NULL;
139		✗	f->filter_context = sws_getCachedContext(f->filter_context,
140			width, height, AV_PIX_FMT_GRAY8,
141			width, height, AV_PIX_FMT_GRAY8,
142			flags, &sws_filter, NULL, NULL);
143
144		✗	sws_freeVec(vec);
145
146		✗	if (!f->filter_context)
147		✗	return AVERROR(EINVAL);
148
149		✗	return 0;
150			}
151
152		✗	static int config_props(AVFilterLink *inlink)
153			{
154		✗	SmartblurContext *s = inlink->dst->priv;
155		✗	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
156
157		✗	s->hsub = desc->log2_chroma_w;
158		✗	s->vsub = desc->log2_chroma_h;
159
160		✗	alloc_sws_context(&s->luma, inlink->w, inlink->h, s->sws_flags);
161		✗	alloc_sws_context(&s->chroma,
162		✗	AV_CEIL_RSHIFT(inlink->w, s->hsub),
163		✗	AV_CEIL_RSHIFT(inlink->h, s->vsub),
164			s->sws_flags);
165
166		✗	return 0;
167			}
168
169		✗	static void blur(uint8_t *dst, const int dst_linesize,
170			const uint8_t *src, const int src_linesize,
171			const int w, const int h, const int threshold,
172			struct SwsContext *filter_context)
173			{
174			int x, y;
175			int orig, filtered;
176			int diff;
177			/* Declare arrays of 4 to get aligned data */
178		✗	const uint8_t* const src_array[4] = {src};
179		✗	uint8_t *dst_array[4] = {dst};
180		✗	int src_linesize_array[4] = {src_linesize};
181		✗	int dst_linesize_array[4] = {dst_linesize};
182
183		✗	sws_scale(filter_context, src_array, src_linesize_array,
184			0, h, dst_array, dst_linesize_array);
185
186		✗	if (threshold > 0) {
187		✗	for (y = 0; y < h; ++y) {
188		✗	for (x = 0; x < w; ++x) {
189		✗	orig = src[x + y * src_linesize];
190		✗	filtered = dst[x + y * dst_linesize];
191		✗	diff = orig - filtered;
192
193		✗	if (diff > 0) {
194		✗	if (diff > 2 * threshold)
195		✗	dst[x + y * dst_linesize] = orig;
196		✗	else if (diff > threshold)
197			/* add 'diff' and subtract 'threshold' from 'filtered' */
198		✗	dst[x + y * dst_linesize] = orig - threshold;
199			} else {
200		✗	if (-diff > 2 * threshold)
201		✗	dst[x + y * dst_linesize] = orig;
202		✗	else if (-diff > threshold)
203			/* add 'diff' and 'threshold' to 'filtered' */
204		✗	dst[x + y * dst_linesize] = orig + threshold;
205			}
206			}
207			}
208		✗	} else if (threshold < 0) {
209		✗	for (y = 0; y < h; ++y) {
210		✗	for (x = 0; x < w; ++x) {
211		✗	orig = src[x + y * src_linesize];
212		✗	filtered = dst[x + y * dst_linesize];
213		✗	diff = orig - filtered;
214
215		✗	if (diff > 0) {
216		✗	if (diff <= -threshold)
217		✗	dst[x + y * dst_linesize] = orig;
218		✗	else if (diff <= -2 * threshold)
219			/* subtract 'diff' and 'threshold' from 'orig' */
220		✗	dst[x + y * dst_linesize] = filtered - threshold;
221			} else {
222		✗	if (diff >= threshold)
223		✗	dst[x + y * dst_linesize] = orig;
224		✗	else if (diff >= 2 * threshold)
225			/* add 'threshold' and subtract 'diff' from 'orig' */
226		✗	dst[x + y * dst_linesize] = filtered + threshold;
227			}
228			}
229			}
230			}
231		✗	}
232
233		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
234			{
235		✗	SmartblurContext *s = inlink->dst->priv;
236		✗	AVFilterLink *outlink = inlink->dst->outputs[0];
237			AVFrame *outpic;
238		✗	int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub);
239		✗	int ch = AV_CEIL_RSHIFT(inlink->h, s->vsub);
240
241		✗	outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
242		✗	if (!outpic) {
243		✗	av_frame_free(&inpic);
244		✗	return AVERROR(ENOMEM);
245			}
246		✗	av_frame_copy_props(outpic, inpic);
247
248		✗	blur(outpic->data[0], outpic->linesize[0],
249		✗	inpic->data[0], inpic->linesize[0],
250			inlink->w, inlink->h, s->luma.threshold,
251			s->luma.filter_context);
252
253		✗	if (inpic->data[2]) {
254		✗	blur(outpic->data[1], outpic->linesize[1],
255		✗	inpic->data[1], inpic->linesize[1],
256			cw, ch, s->chroma.threshold,
257			s->chroma.filter_context);
258		✗	blur(outpic->data[2], outpic->linesize[2],
259		✗	inpic->data[2], inpic->linesize[2],
260			cw, ch, s->chroma.threshold,
261			s->chroma.filter_context);
262			}
263
264		✗	av_frame_free(&inpic);
265		✗	return ff_filter_frame(outlink, outpic);
266			}
267
268			static const AVFilterPad smartblur_inputs[] = {
269			{
270			.name = "default",
271			.type = AVMEDIA_TYPE_VIDEO,
272			.filter_frame = filter_frame,
273			.config_props = config_props,
274			},
275			};
276
277			const AVFilter ff_vf_smartblur = {
278			.name = "smartblur",
279			.description = NULL_IF_CONFIG_SMALL("Blur the input video without impacting the outlines."),
280			.priv_size = sizeof(SmartblurContext),
281			.init = init,
282			.uninit = uninit,
283			FILTER_INPUTS(smartblur_inputs),
284			FILTER_OUTPUTS(ff_video_default_filterpad),
285			FILTER_PIXFMTS_ARRAY(pix_fmts),
286			.priv_class = &smartblur_class,
287			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
288			};
289