FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Original MPlayer filters by Richard Felker, Hampa Hug, Daniel Moreno,
3			* and Michael Niedermeyer.
4			*
5			* Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
6			* Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
7			*
8			* This file is part of FFmpeg.
9			*
10			* FFmpeg is free software; you can redistribute it and/or modify
11			* it under the terms of the GNU General Public License as published by
12			* the Free Software Foundation; either version 2 of the License, or
13			* (at your option) any later version.
14			*
15			* FFmpeg is distributed in the hope that it will be useful,
16			* but WITHOUT ANY WARRANTY; without even the implied warranty of
17			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			* GNU General Public License for more details.
19			*
20			* You should have received a copy of the GNU General Public License along
21			* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
22			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23			*/
24
25			/**
26			* @file
27			* very simple video equalizer
28			*/
29
30			#include "libavutil/common.h"
31			#include "libavutil/imgutils.h"
32			#include "libavutil/opt.h"
33			#include "libavutil/pixdesc.h"
34			#include "internal.h"
35			#include "vf_eq.h"
36			#include "video.h"
37
38		✗	static void create_lut(EQParameters *param)
39			{
40			int i;
41		✗	double g = 1.0 / param->gamma;
42		✗	double lw = 1.0 - param->gamma_weight;
43
44		✗	for (i = 0; i < 256; i++) {
45		✗	double v = i / 255.0;
46		✗	v = param->contrast * (v - 0.5) + 0.5 + param->brightness;
47
48		✗	if (v <= 0.0) {
49		✗	param->lut[i] = 0;
50			} else {
51		✗	v = v * lw + pow(v, g) * param->gamma_weight;
52
53		✗	if (v >= 1.0)
54		✗	param->lut[i] = 255;
55			else
56		✗	param->lut[i] = 256.0 * v;
57			}
58			}
59
60		✗	param->lut_clean = 1;
61		✗	}
62
63		✗	static void apply_lut(EQParameters *param, uint8_t *dst, int dst_stride,
64			const uint8_t *src, int src_stride, int w, int h)
65			{
66			int x, y;
67
68		✗	if (!param->lut_clean)
69		✗	create_lut(param);
70
71		✗	for (y = 0; y < h; y++) {
72		✗	for (x = 0; x < w; x++) {
73		✗	dst[y * dst_stride + x] = param->lut[src[y * src_stride + x]];
74			}
75			}
76		✗	}
77
78		✗	static void check_values(EQParameters *param, EQContext *eq)
79			{
80		✗	if (param->contrast == 1.0 && param->brightness == 0.0 && param->gamma == 1.0)
81		✗	param->adjust = NULL;
82		✗	else if (param->gamma == 1.0 && fabs(param->contrast) < 7.9)
83		✗	param->adjust = eq->process;
84			else
85		✗	param->adjust = apply_lut;
86		✗	}
87
88		✗	static void set_contrast(EQContext *eq)
89			{
90		✗	eq->contrast = av_clipf(av_expr_eval(eq->contrast_pexpr, eq->var_values, eq), -1000.0, 1000.0);
91		✗	eq->param[0].contrast = eq->contrast;
92		✗	eq->param[0].lut_clean = 0;
93		✗	check_values(&eq->param[0], eq);
94		✗	}
95
96		✗	static void set_brightness(EQContext *eq)
97			{
98		✗	eq->brightness = av_clipf(av_expr_eval(eq->brightness_pexpr, eq->var_values, eq), -1.0, 1.0);
99		✗	eq->param[0].brightness = eq->brightness;
100		✗	eq->param[0].lut_clean = 0;
101		✗	check_values(&eq->param[0], eq);
102		✗	}
103
104		✗	static void set_gamma(EQContext *eq)
105			{
106			int i;
107
108		✗	eq->gamma = av_clipf(av_expr_eval(eq->gamma_pexpr, eq->var_values, eq), 0.1, 10.0);
109		✗	eq->gamma_r = av_clipf(av_expr_eval(eq->gamma_r_pexpr, eq->var_values, eq), 0.1, 10.0);
110		✗	eq->gamma_g = av_clipf(av_expr_eval(eq->gamma_g_pexpr, eq->var_values, eq), 0.1, 10.0);
111		✗	eq->gamma_b = av_clipf(av_expr_eval(eq->gamma_b_pexpr, eq->var_values, eq), 0.1, 10.0);
112		✗	eq->gamma_weight = av_clipf(av_expr_eval(eq->gamma_weight_pexpr, eq->var_values, eq), 0.0, 1.0);
113
114		✗	eq->param[0].gamma = eq->gamma * eq->gamma_g;
115		✗	eq->param[1].gamma = sqrt(eq->gamma_b / eq->gamma_g);
116		✗	eq->param[2].gamma = sqrt(eq->gamma_r / eq->gamma_g);
117
118		✗	for (i = 0; i < 3; i++) {
119		✗	eq->param[i].gamma_weight = eq->gamma_weight;
120		✗	eq->param[i].lut_clean = 0;
121		✗	check_values(&eq->param[i], eq);
122			}
123		✗	}
124
125		✗	static void set_saturation(EQContext *eq)
126			{
127			int i;
128
129		✗	eq->saturation = av_clipf(av_expr_eval(eq->saturation_pexpr, eq->var_values, eq), 0.0, 3.0);
130
131		✗	for (i = 1; i < 3; i++) {
132		✗	eq->param[i].contrast = eq->saturation;
133		✗	eq->param[i].lut_clean = 0;
134		✗	check_values(&eq->param[i], eq);
135			}
136		✗	}
137
138		✗	static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
139			{
140			int ret;
141		✗	AVExpr *old = NULL;
142
143		✗	if (*pexpr)
144		✗	old = *pexpr;
145		✗	ret = av_expr_parse(pexpr, expr, var_names, NULL, NULL, NULL, NULL, 0, log_ctx);
146		✗	if (ret < 0) {
147		✗	av_log(log_ctx, AV_LOG_ERROR,
148			"Error when parsing the expression '%s' for %s\n",
149			expr, option);
150		✗	*pexpr = old;
151		✗	return ret;
152			}
153
154		✗	av_expr_free(old);
155		✗	return 0;
156			}
157
158		✗	static int initialize(AVFilterContext *ctx)
159			{
160		✗	EQContext *eq = ctx->priv;
161			int ret;
162		✗	ff_eq_init(eq);
163
164		✗	if ((ret = set_expr(&eq->contrast_pexpr, eq->contrast_expr, "contrast", ctx)) < 0 ||
165		✗	(ret = set_expr(&eq->brightness_pexpr, eq->brightness_expr, "brightness", ctx)) < 0 ||
166		✗	(ret = set_expr(&eq->saturation_pexpr, eq->saturation_expr, "saturation", ctx)) < 0 ||
167		✗	(ret = set_expr(&eq->gamma_pexpr, eq->gamma_expr, "gamma", ctx)) < 0 ||
168		✗	(ret = set_expr(&eq->gamma_r_pexpr, eq->gamma_r_expr, "gamma_r", ctx)) < 0 ||
169		✗	(ret = set_expr(&eq->gamma_g_pexpr, eq->gamma_g_expr, "gamma_g", ctx)) < 0 ||
170		✗	(ret = set_expr(&eq->gamma_b_pexpr, eq->gamma_b_expr, "gamma_b", ctx)) < 0 ||
171		✗	(ret = set_expr(&eq->gamma_weight_pexpr, eq->gamma_weight_expr, "gamma_weight", ctx)) < 0 )
172		✗	return ret;
173
174		✗	if (eq->eval_mode == EVAL_MODE_INIT) {
175		✗	set_gamma(eq);
176		✗	set_contrast(eq);
177		✗	set_brightness(eq);
178		✗	set_saturation(eq);
179			}
180
181		✗	return 0;
182			}
183
184		✗	static av_cold void uninit(AVFilterContext *ctx)
185			{
186		✗	EQContext *eq = ctx->priv;
187
188		✗	av_expr_free(eq->contrast_pexpr); eq->contrast_pexpr = NULL;
189		✗	av_expr_free(eq->brightness_pexpr); eq->brightness_pexpr = NULL;
190		✗	av_expr_free(eq->saturation_pexpr); eq->saturation_pexpr = NULL;
191		✗	av_expr_free(eq->gamma_pexpr); eq->gamma_pexpr = NULL;
192		✗	av_expr_free(eq->gamma_weight_pexpr); eq->gamma_weight_pexpr = NULL;
193		✗	av_expr_free(eq->gamma_r_pexpr); eq->gamma_r_pexpr = NULL;
194		✗	av_expr_free(eq->gamma_g_pexpr); eq->gamma_g_pexpr = NULL;
195		✗	av_expr_free(eq->gamma_b_pexpr); eq->gamma_b_pexpr = NULL;
196		✗	}
197
198		✗	static int config_props(AVFilterLink *inlink)
199			{
200		✗	EQContext *eq = inlink->dst->priv;
201
202		✗	eq->var_values[VAR_N] = 0;
203		✗	eq->var_values[VAR_R] = inlink->frame_rate.num == 0 || inlink->frame_rate.den == 0 ?
204		✗	NAN : av_q2d(inlink->frame_rate);
205
206		✗	return 0;
207			}
208
209			static const enum AVPixelFormat pixel_fmts_eq[] = {
210			AV_PIX_FMT_GRAY8,
211			AV_PIX_FMT_YUV410P,
212			AV_PIX_FMT_YUV411P,
213			AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
214			AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,
215			AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
216			AV_PIX_FMT_NONE
217			};
218
219		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *in)
220			{
221		✗	AVFilterContext *ctx = inlink->dst;
222		✗	AVFilterLink *outlink = inlink->dst->outputs[0];
223		✗	EQContext *eq = ctx->priv;
224			AVFrame *out;
225			const AVPixFmtDescriptor *desc;
226			int i;
227
228		✗	out = ff_get_video_buffer(outlink, inlink->w, inlink->h);
229		✗	if (!out) {
230		✗	av_frame_free(&in);
231		✗	return AVERROR(ENOMEM);
232			}
233
234		✗	av_frame_copy_props(out, in);
235		✗	desc = av_pix_fmt_desc_get(inlink->format);
236
237		✗	eq->var_values[VAR_N] = inlink->frame_count_out;
238			#if FF_API_FRAME_PKT
239			FF_DISABLE_DEPRECATION_WARNINGS
240			{
241		✗	int64_t pos = in->pkt_pos;
242		✗	eq->var_values[VAR_POS] = pos == -1 ? NAN : pos;
243			}
244			FF_ENABLE_DEPRECATION_WARNINGS
245			#endif
246		✗	eq->var_values[VAR_T] = TS2T(in->pts, inlink->time_base);
247
248		✗	if (eq->eval_mode == EVAL_MODE_FRAME) {
249		✗	set_gamma(eq);
250		✗	set_contrast(eq);
251		✗	set_brightness(eq);
252		✗	set_saturation(eq);
253			}
254
255		✗	for (i = 0; i < desc->nb_components; i++) {
256		✗	int w = inlink->w;
257		✗	int h = inlink->h;
258
259		✗	if (i == 1 || i == 2) {
260		✗	w = AV_CEIL_RSHIFT(w, desc->log2_chroma_w);
261		✗	h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
262			}
263
264		✗	if (i == 3 || !eq->param[i].adjust)
265		✗	av_image_copy_plane(out->data[i], out->linesize[i],
266		✗	in->data[i], in->linesize[i], w, h);
267
268			else
269		✗	eq->param[i].adjust(&eq->param[i], out->data[i], out->linesize[i],
270		✗	in->data[i], in->linesize[i], w, h);
271			}
272
273		✗	av_frame_free(&in);
274		✗	return ff_filter_frame(outlink, out);
275			}
276
277		✗	static inline int set_param(AVExpr **pexpr, const char *args, const char *cmd,
278			void (*set_fn)(EQContext *eq), AVFilterContext *ctx)
279			{
280		✗	EQContext *eq = ctx->priv;
281			int ret;
282		✗	if ((ret = set_expr(pexpr, args, cmd, ctx)) < 0)
283		✗	return ret;
284		✗	if (eq->eval_mode == EVAL_MODE_INIT)
285		✗	set_fn(eq);
286		✗	return 0;
287			}
288
289		✗	static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
290			char *res, int res_len, int flags)
291			{
292		✗	EQContext *eq = ctx->priv;
293
294			#define SET_PARAM(param_name, set_fn_name) \
295			if (!strcmp(cmd, #param_name)) return set_param(&eq->param_name##_pexpr, args, cmd, set_##set_fn_name, ctx);
296
297		✗	SET_PARAM(contrast, contrast)
298		✗	else SET_PARAM(brightness, brightness)
299		✗	else SET_PARAM(saturation, saturation)
300		✗	else SET_PARAM(gamma, gamma)
301		✗	else SET_PARAM(gamma_r, gamma)
302		✗	else SET_PARAM(gamma_g, gamma)
303		✗	else SET_PARAM(gamma_b, gamma)
304		✗	else SET_PARAM(gamma_weight, gamma)
305		✗	else return AVERROR(ENOSYS);
306			}
307
308			static const AVFilterPad eq_inputs[] = {
309			{
310			.name = "default",
311			.type = AVMEDIA_TYPE_VIDEO,
312			.filter_frame = filter_frame,
313			.config_props = config_props,
314			},
315			};
316
317			#define OFFSET(x) offsetof(EQContext, x)
318			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
319			#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
320			static const AVOption eq_options[] = {
321			{ "contrast", "set the contrast adjustment, negative values give a negative image",
322			OFFSET(contrast_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
323			{ "brightness", "set the brightness adjustment",
324			OFFSET(brightness_expr), AV_OPT_TYPE_STRING, {.str = "0.0"}, 0, 0, TFLAGS },
325			{ "saturation", "set the saturation adjustment",
326			OFFSET(saturation_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
327			{ "gamma", "set the initial gamma value",
328			OFFSET(gamma_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
329			{ "gamma_r", "gamma value for red",
330			OFFSET(gamma_r_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
331			{ "gamma_g", "gamma value for green",
332			OFFSET(gamma_g_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
333			{ "gamma_b", "gamma value for blue",
334			OFFSET(gamma_b_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
335			{ "gamma_weight", "set the gamma weight which reduces the effect of gamma on bright areas",
336			OFFSET(gamma_weight_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
337			{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "eval" },
338			{ "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
339			{ "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
340			{ NULL }
341			};
342
343			AVFILTER_DEFINE_CLASS(eq);
344
345			const AVFilter ff_vf_eq = {
346			.name = "eq",
347			.description = NULL_IF_CONFIG_SMALL("Adjust brightness, contrast, gamma, and saturation."),
348			.priv_size = sizeof(EQContext),
349			.priv_class = &eq_class,
350			FILTER_INPUTS(eq_inputs),
351			FILTER_OUTPUTS(ff_video_default_filterpad),
352			FILTER_PIXFMTS_ARRAY(pixel_fmts_eq),
353			.process_command = process_command,
354			.init = initialize,
355			.uninit = uninit,
356			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
357			};
358