FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/vf_aspect.c	Lines:	53	62	85.5 %
Date:	2021-04-22 14:24:15	Branches:	13	22	59.1 %


/*
 * Copyright (c) 2010 Bobby Bingham
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * aspect ratio modification video filters
 */

#include <float.h>

#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"

#include "avfilter.h"
#include "internal.h"
#include "video.h"

static const char *const var_names[] = {
    "w",
    "h",
    "a", "dar",
    "sar",
    "hsub",
    "vsub",
    NULL
};

enum var_name {
    VAR_W,
    VAR_H,
    VAR_A, VAR_DAR,
    VAR_SAR,
    VAR_HSUB,
    VAR_VSUB,
    VARS_NB
};

typedef struct AspectContext {
    const AVClass *class;
    AVRational dar;
    AVRational sar;
    int max;
    char *ratio_expr;
} AspectContext;

static int filter_frame(AVFilterLink *link, AVFrame *frame)
{
    AspectContext *s = link->dst->priv;

    frame->sample_aspect_ratio = s->sar;
    return ff_filter_frame(link->dst->outputs[0], frame);
}

#define OFFSET(x) offsetof(AspectContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static inline void compute_dar(AVRational *dar, AVRational sar, int w, int h)
{
    if (sar.num && sar.den) {
        av_reduce(&dar->num, &dar->den, sar.num * (int64_t)w, sar.den * (int64_t)h, INT_MAX);
    } else {
        av_reduce(&dar->num, &dar->den, w, h, INT_MAX);
    }
}

static int get_aspect_ratio(AVFilterLink *inlink, AVRational *aspect_ratio)
{
    AVFilterContext *ctx = inlink->dst;
    AspectContext *s = inlink->dst->priv;
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
    double var_values[VARS_NB], res;
    int ret;

    var_values[VAR_W]     = inlink->w;
    var_values[VAR_H]     = inlink->h;
    var_values[VAR_A]     = (double) inlink->w / inlink->h;
    var_values[VAR_SAR]   = inlink->sample_aspect_ratio.num ?
        (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
    var_values[VAR_DAR]   = var_values[VAR_A] * var_values[VAR_SAR];
    var_values[VAR_HSUB]  = 1 << desc->log2_chroma_w;
    var_values[VAR_VSUB]  = 1 << desc->log2_chroma_h;

    /* evaluate new aspect ratio*/
    ret = av_expr_parse_and_eval(&res, s->ratio_expr,
                                      var_names, var_values,
                                      NULL, NULL, NULL, NULL, NULL, 0, ctx);
    if (ret < 0) {
        ret = av_parse_ratio(aspect_ratio, s->ratio_expr, s->max, 0, ctx);
    } else
        *aspect_ratio = av_d2q(res, s->max);

    if (ret < 0) {
        av_log(ctx, AV_LOG_ERROR,
               "Error when evaluating the expression '%s'\n", s->ratio_expr);
        return ret;
    }
    if (aspect_ratio->num < 0 || aspect_ratio->den <= 0) {
        av_log(ctx, AV_LOG_ERROR,
                "Invalid string '%s' for aspect ratio\n", s->ratio_expr);
        return AVERROR(EINVAL);
    }
    return 0;
}

#if CONFIG_SETDAR_FILTER

static int setdar_config_props(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    AVFilterLink *inlink = ctx->inputs[0];
    AspectContext *s = ctx->priv;
    AVRational dar;
    AVRational old_dar;
    AVRational old_sar = inlink->sample_aspect_ratio;
    int ret;

    if ((ret = get_aspect_ratio(inlink, &s->dar)))
        return ret;

    if (s->dar.num && s->dar.den) {
        av_reduce(&s->sar.num, &s->sar.den,
                   s->dar.num * inlink->h,
                   s->dar.den * inlink->w, INT_MAX);
        outlink->sample_aspect_ratio = s->sar;
        dar = s->dar;
    } else {
        outlink->sample_aspect_ratio = (AVRational){ 1, 1 };
        dar = (AVRational){ inlink->w, inlink->h };
    }

    compute_dar(&old_dar, old_sar, inlink->w, inlink->h);
    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dar:%d/%d sar:%d/%d -> dar:%d/%d sar:%d/%d\n",
           inlink->w, inlink->h, old_dar.num, old_dar.den, old_sar.num, old_sar.den,
           dar.num, dar.den, outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den);

    return 0;
}

static const AVOption setdar_options[] = {
    { "dar",   "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "ratio", "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "r",     "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "max",   "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(setdar);

static const AVFilterPad avfilter_vf_setdar_inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
};

static const AVFilterPad avfilter_vf_setdar_outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = setdar_config_props,
    },
    { NULL }
};

AVFilter ff_vf_setdar = {
    .name        = "setdar",
    .description = NULL_IF_CONFIG_SMALL("Set the frame display aspect ratio."),
    .priv_size   = sizeof(AspectContext),
    .priv_class  = &setdar_class,
    .inputs      = avfilter_vf_setdar_inputs,
    .outputs     = avfilter_vf_setdar_outputs,
};

#endif /* CONFIG_SETDAR_FILTER */

#if CONFIG_SETSAR_FILTER

static int setsar_config_props(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    AVFilterLink *inlink = ctx->inputs[0];
    AspectContext *s = ctx->priv;
    AVRational old_sar = inlink->sample_aspect_ratio;
    AVRational old_dar, dar;
    int ret;

    if ((ret = get_aspect_ratio(inlink, &s->sar)))
        return ret;

    outlink->sample_aspect_ratio = s->sar;

    compute_dar(&old_dar, old_sar, inlink->w, inlink->h);
    compute_dar(&dar, s->sar, inlink->w, inlink->h);
    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d sar:%d/%d dar:%d/%d -> sar:%d/%d dar:%d/%d\n",
           inlink->w, inlink->h, old_sar.num, old_sar.den, old_dar.num, old_dar.den,
           outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den, dar.num, dar.den);

    return 0;
}

static const AVOption setsar_options[] = {
    { "sar",   "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "ratio", "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "r",     "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
    { "max",   "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
    { NULL }
};

AVFILTER_DEFINE_CLASS(setsar);

static const AVFilterPad avfilter_vf_setsar_inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
};

static const AVFilterPad avfilter_vf_setsar_outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = setsar_config_props,
    },
    { NULL }
};

AVFilter ff_vf_setsar = {
    .name        = "setsar",
    .description = NULL_IF_CONFIG_SMALL("Set the pixel sample aspect ratio."),
    .priv_size   = sizeof(AspectContext),
    .priv_class  = &setsar_class,
    .inputs      = avfilter_vf_setsar_inputs,
    .outputs     = avfilter_vf_setsar_outputs,
};

#endif /* CONFIG_SETSAR_FILTER */


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2010 Bobby Bingham
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			/**
22			* @file
23			* aspect ratio modification video filters
24			*/
25
26			#include <float.h>
27
28			#include "libavutil/common.h"
29			#include "libavutil/eval.h"
30			#include "libavutil/mathematics.h"
31			#include "libavutil/opt.h"
32			#include "libavutil/parseutils.h"
33			#include "libavutil/pixdesc.h"
34
35			#include "avfilter.h"
36			#include "internal.h"
37			#include "video.h"
38
39			static const char *const var_names[] = {
40			"w",
41			"h",
42			"a", "dar",
43			"sar",
44			"hsub",
45			"vsub",
46			NULL
47			};
48
49			enum var_name {
50			VAR_W,
51			VAR_H,
52			VAR_A, VAR_DAR,
53			VAR_SAR,
54			VAR_HSUB,
55			VAR_VSUB,
56			VARS_NB
57			};
58
59			typedef struct AspectContext {
60			const AVClass *class;
61			AVRational dar;
62			AVRational sar;
63			int max;
64			char *ratio_expr;
65			} AspectContext;
66
67		63	static int filter_frame(AVFilterLink link, AVFrame frame)
68			{
69		63	AspectContext *s = link->dst->priv;
70
71		63	frame->sample_aspect_ratio = s->sar;
72		63	return ff_filter_frame(link->dst->outputs[0], frame);
73			}
74
75			#define OFFSET(x) offsetof(AspectContext, x)
76			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_VIDEO_PARAM
77
78		7	static inline void compute_dar(AVRational *dar, AVRational sar, int w, int h)
79			{
80	✓✓✓✗	7	if (sar.num && sar.den) {
81		3	av_reduce(&dar->num, &dar->den, sar.num * (int64_t)w, sar.den * (int64_t)h, INT_MAX);
82			} else {
83		4	av_reduce(&dar->num, &dar->den, w, h, INT_MAX);
84			}
85		7	}
86
87		5	static int get_aspect_ratio(AVFilterLink inlink, AVRational aspect_ratio)
88			{
89		5	AVFilterContext *ctx = inlink->dst;
90		5	AspectContext *s = inlink->dst->priv;
91		5	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
92			double var_values[VARS_NB], res;
93			int ret;
94
95		5	var_values[VAR_W] = inlink->w;
96		5	var_values[VAR_H] = inlink->h;
97		5	var_values[VAR_A] = (double) inlink->w / inlink->h;
98		10	var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
99	✓✓	5	(double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
100		5	var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
101		5	var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
102		5	var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
103
104			/* evaluate new aspect ratio*/
105		5	ret = av_expr_parse_and_eval(&res, s->ratio_expr,
106			var_names, var_values,
107			NULL, NULL, NULL, NULL, NULL, 0, ctx);
108	✗✓	5	if (ret < 0) {
109			ret = av_parse_ratio(aspect_ratio, s->ratio_expr, s->max, 0, ctx);
110			} else
111		5	*aspect_ratio = av_d2q(res, s->max);
112
113	✗✓	5	if (ret < 0) {
114			av_log(ctx, AV_LOG_ERROR,
115			"Error when evaluating the expression '%s'\n", s->ratio_expr);
116			return ret;
117			}
118	✓✗✗✓	5	if (aspect_ratio->num < 0 \|\| aspect_ratio->den <= 0) {
119			av_log(ctx, AV_LOG_ERROR,
120			"Invalid string '%s' for aspect ratio\n", s->ratio_expr);
121			return AVERROR(EINVAL);
122			}
123		5	return 0;
124			}
125
126			#if CONFIG_SETDAR_FILTER
127
128		3	static int setdar_config_props(AVFilterLink *outlink)
129			{
130		3	AVFilterContext *ctx = outlink->src;
131		3	AVFilterLink *inlink = ctx->inputs[0];
132		3	AspectContext *s = ctx->priv;
133			AVRational dar;
134			AVRational old_dar;
135		3	AVRational old_sar = inlink->sample_aspect_ratio;
136			int ret;
137
138	✗✓	3	if ((ret = get_aspect_ratio(inlink, &s->dar)))
139			return ret;
140
141	✓✗✓✗	3	if (s->dar.num && s->dar.den) {
142		3	av_reduce(&s->sar.num, &s->sar.den,
143		3	s->dar.num * inlink->h,
144		3	s->dar.den * inlink->w, INT_MAX);
145		3	outlink->sample_aspect_ratio = s->sar;
146		3	dar = s->dar;
147			} else {
148			outlink->sample_aspect_ratio = (AVRational){ 1, 1 };
149			dar = (AVRational){ inlink->w, inlink->h };
150			}
151
152		3	compute_dar(&old_dar, old_sar, inlink->w, inlink->h);
153		3	av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dar:%d/%d sar:%d/%d -> dar:%d/%d sar:%d/%d\n",
154			inlink->w, inlink->h, old_dar.num, old_dar.den, old_sar.num, old_sar.den,
155			dar.num, dar.den, outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den);
156
157		3	return 0;
158			}
159
160			static const AVOption setdar_options[] = {
161			{ "dar", "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
162			{ "ratio", "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
163			{ "r", "set display aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
164			{ "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
165			{ NULL }
166			};
167
168			AVFILTER_DEFINE_CLASS(setdar);
169
170			static const AVFilterPad avfilter_vf_setdar_inputs[] = {
171			{
172			.name = "default",
173			.type = AVMEDIA_TYPE_VIDEO,
174			.filter_frame = filter_frame,
175			},
176			{ NULL }
177			};
178
179			static const AVFilterPad avfilter_vf_setdar_outputs[] = {
180			{
181			.name = "default",
182			.type = AVMEDIA_TYPE_VIDEO,
183			.config_props = setdar_config_props,
184			},
185			{ NULL }
186			};
187
188			AVFilter ff_vf_setdar = {
189			.name = "setdar",
190			.description = NULL_IF_CONFIG_SMALL("Set the frame display aspect ratio."),
191			.priv_size = sizeof(AspectContext),
192			.priv_class = &setdar_class,
193			.inputs = avfilter_vf_setdar_inputs,
194			.outputs = avfilter_vf_setdar_outputs,
195			};
196
197			#endif /* CONFIG_SETDAR_FILTER */
198
199			#if CONFIG_SETSAR_FILTER
200
201		2	static int setsar_config_props(AVFilterLink *outlink)
202			{
203		2	AVFilterContext *ctx = outlink->src;
204		2	AVFilterLink *inlink = ctx->inputs[0];
205		2	AspectContext *s = ctx->priv;
206		2	AVRational old_sar = inlink->sample_aspect_ratio;
207			AVRational old_dar, dar;
208			int ret;
209
210	✗✓	2	if ((ret = get_aspect_ratio(inlink, &s->sar)))
211			return ret;
212
213		2	outlink->sample_aspect_ratio = s->sar;
214
215		2	compute_dar(&old_dar, old_sar, inlink->w, inlink->h);
216		2	compute_dar(&dar, s->sar, inlink->w, inlink->h);
217		2	av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d sar:%d/%d dar:%d/%d -> sar:%d/%d dar:%d/%d\n",
218			inlink->w, inlink->h, old_sar.num, old_sar.den, old_dar.num, old_dar.den,
219			outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den, dar.num, dar.den);
220
221		2	return 0;
222			}
223
224			static const AVOption setsar_options[] = {
225			{ "sar", "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
226			{ "ratio", "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
227			{ "r", "set sample (pixel) aspect ratio", OFFSET(ratio_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS },
228			{ "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS },
229			{ NULL }
230			};
231
232			AVFILTER_DEFINE_CLASS(setsar);
233
234			static const AVFilterPad avfilter_vf_setsar_inputs[] = {
235			{
236			.name = "default",
237			.type = AVMEDIA_TYPE_VIDEO,
238			.filter_frame = filter_frame,
239			},
240			{ NULL }
241			};
242
243			static const AVFilterPad avfilter_vf_setsar_outputs[] = {
244			{
245			.name = "default",
246			.type = AVMEDIA_TYPE_VIDEO,
247			.config_props = setsar_config_props,
248			},
249			{ NULL }
250			};
251
252			AVFilter ff_vf_setsar = {
253			.name = "setsar",
254			.description = NULL_IF_CONFIG_SMALL("Set the pixel sample aspect ratio."),
255			.priv_size = sizeof(AspectContext),
256			.priv_class = &setsar_class,
257			.inputs = avfilter_vf_setsar_inputs,
258			.outputs = avfilter_vf_setsar_outputs,
259			};
260
261			#endif /* CONFIG_SETSAR_FILTER */