GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/boxblur.c Lines: 29 33 87.9 %
Date: 2020-09-25 23:16:12 Branches: 16 32 50.0 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3
 * Copyright (c) 2011 Stefano Sabatini
4
 * Copyright (c) 2018 Danil Iashchenko
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22
23
#include "boxblur.h"
24
25
static const char *const var_names[] = {
26
    "w",
27
    "h",
28
    "cw",
29
    "ch",
30
    "hsub",
31
    "vsub",
32
    NULL
33
};
34
35
enum var_name {
36
    VAR_W,
37
    VAR_H,
38
    VAR_CW,
39
    VAR_CH,
40
    VAR_HSUB,
41
    VAR_VSUB,
42
    VARS_NB
43
};
44
45
46
1
int ff_boxblur_eval_filter_params(AVFilterLink *inlink,
47
                                  FilterParam *luma_param,
48
                                  FilterParam *chroma_param,
49
                                  FilterParam *alpha_param)
50
{
51
1
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
52
1
    AVFilterContext *ctx = inlink->dst;
53
1
    int w = inlink->w, h = inlink->h;
54
    int cw, ch;
55
    double var_values[VARS_NB], res;
56
    char *expr;
57
    int ret;
58
59
1
    if (!luma_param->radius_expr) {
60
        av_log(ctx, AV_LOG_ERROR, "Luma radius expression is not set.\n");
61
        return AVERROR(EINVAL);
62
    }
63
64
    /* fill missing params */
65
1
    if (!chroma_param->radius_expr) {
66
1
        chroma_param->radius_expr = av_strdup(luma_param->radius_expr);
67
1
        if (!chroma_param->radius_expr)
68
            return AVERROR(ENOMEM);
69
    }
70
1
    if (chroma_param->power < 0)
71
1
        chroma_param->power = luma_param->power;
72
73
1
    if (!alpha_param->radius_expr) {
74
1
        alpha_param->radius_expr = av_strdup(luma_param->radius_expr);
75
1
        if (!alpha_param->radius_expr)
76
            return AVERROR(ENOMEM);
77
    }
78
1
    if (alpha_param->power < 0)
79
1
        alpha_param->power = luma_param->power;
80
81
1
    var_values[VAR_W]       = inlink->w;
82
1
    var_values[VAR_H]       = inlink->h;
83
1
    var_values[VAR_CW] = cw = w>>(desc->log2_chroma_w);
84
1
    var_values[VAR_CH] = ch = h>>(desc->log2_chroma_h);
85
1
    var_values[VAR_HSUB]    = 1<<(desc->log2_chroma_w);
86
1
    var_values[VAR_VSUB]    = 1<<(desc->log2_chroma_h);
87
88
#define EVAL_RADIUS_EXPR(comp)                                          \
89
    expr = comp->radius_expr;                                           \
90
    ret = av_expr_parse_and_eval(&res, expr, var_names, var_values,     \
91
                                 NULL, NULL, NULL, NULL, NULL, 0, ctx); \
92
    comp->radius = res;                                                 \
93
    if (ret < 0) {                                                      \
94
        av_log(ctx, AV_LOG_ERROR,                                      \
95
               "Error when evaluating " #comp " radius expression '%s'\n", expr); \
96
        return ret;                                                     \
97
    }
98
99
1
    EVAL_RADIUS_EXPR(luma_param);
100
1
    EVAL_RADIUS_EXPR(chroma_param);
101
1
    EVAL_RADIUS_EXPR(alpha_param);
102
103
1
    av_log(ctx, AV_LOG_VERBOSE,
104
           "luma_radius:%d luma_power:%d "
105
           "chroma_radius:%d chroma_power:%d "
106
           "alpha_radius:%d alpha_power:%d "
107
           "w:%d chroma_w:%d h:%d chroma_h:%d\n",
108
           luma_param  ->radius, luma_param  ->power,
109
           chroma_param->radius, chroma_param->power,
110
           alpha_param ->radius, alpha_param ->power,
111
           w, cw, h, ch);
112
113
114
#define CHECK_RADIUS_VAL(w_, h_, comp)                                  \
115
    if (comp->radius < 0 ||                                   \
116
        2*comp->radius > FFMIN(w_, h_)) {                     \
117
        av_log(ctx, AV_LOG_ERROR,                                       \
118
               "Invalid " #comp " radius value %d, must be >= 0 and <= %d\n", \
119
               comp->radius, FFMIN(w_, h_)/2);                \
120
        return AVERROR(EINVAL);                                         \
121
    }
122

1
    CHECK_RADIUS_VAL(w,  h,  luma_param);
123

1
    CHECK_RADIUS_VAL(cw, ch, chroma_param);
124

1
    CHECK_RADIUS_VAL(w,  h,  alpha_param);
125
126
1
    return 0;
127
}