FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/af_aformat.c
Date: 2024-07-17 14:05:47
Exec Total Coverage
Lines: 44 51 86.3%
Functions: 5 5 100.0%
Branches: 26 36 72.2%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2011 Mina Nagy Zaki
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 * format audio filter
24 */
25
26 #include "libavutil/avstring.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/common.h"
29 #include "libavutil/opt.h"
30
31 #include "audio.h"
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35
36 typedef struct AFormatContext {
37 const AVClass *class;
38
39 AVFilterFormats *formats;
40 AVFilterFormats *sample_rates;
41 AVFilterChannelLayouts *channel_layouts;
42
43 char *formats_str;
44 char *sample_rates_str;
45 char *channel_layouts_str;
46 } AFormatContext;
47
48 #define OFFSET(x) offsetof(AFormatContext, x)
49 #define A AV_OPT_FLAG_AUDIO_PARAM
50 #define F AV_OPT_FLAG_FILTERING_PARAM
51 static const AVOption aformat_options[] = {
52 { "sample_fmts", "A '|'-separated list of sample formats.", OFFSET(formats_str), AV_OPT_TYPE_STRING, .flags = A|F },
53 { "f", "A '|'-separated list of sample formats.", OFFSET(formats_str), AV_OPT_TYPE_STRING, .flags = A|F },
54 { "sample_rates", "A '|'-separated list of sample rates.", OFFSET(sample_rates_str), AV_OPT_TYPE_STRING, .flags = A|F },
55 { "r", "A '|'-separated list of sample rates.", OFFSET(sample_rates_str), AV_OPT_TYPE_STRING, .flags = A|F },
56 { "channel_layouts", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
57 { "cl", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
58 { NULL }
59 };
60
61 AVFILTER_DEFINE_CLASS(aformat);
62
63 #define PARSE_FORMATS(str, type, list, add_to_list, get_fmt, none, desc) \
64 do { \
65 char *next, *cur = str; \
66 int ret; \
67 \
68 while (cur) { \
69 type fmt; \
70 next = strchr(cur, '|'); \
71 if (next) \
72 *next++ = 0; \
73 \
74 if ((fmt = get_fmt(cur)) == none) { \
75 av_log(ctx, AV_LOG_ERROR, "Error parsing " desc ": %s.\n", cur);\
76 return AVERROR(EINVAL); \
77 } \
78 if ((ret = add_to_list(&list, fmt)) < 0) { \
79 return ret; \
80 } \
81 \
82 cur = next; \
83 } \
84 } while (0)
85
86 336 static int get_sample_rate(const char *samplerate)
87 {
88 336 int ret = strtol(samplerate, NULL, 0);
89 336 return FFMAX(ret, 0);
90 }
91
92 1880 static int parse_channel_layouts(AVFilterContext *ctx)
93 {
94 1880 AFormatContext *s = ctx->priv;
95 1880 char *next, *cur = s->channel_layouts_str;
96 1880 AVChannelLayout fmt = { 0 };
97 int ret;
98
99
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2262 while (cur) {
100 382 next = strchr(cur, '|');
101
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382 if (next)
102 292 *next++ = 0;
103
104 382 ret = av_channel_layout_from_string(&fmt, cur);
105
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382 if (ret < 0) {
106 av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout: %s.\n", cur);
107 return AVERROR(EINVAL);
108 }
109 382 ret = ff_add_channel_layout(&s->channel_layouts, &fmt);
110 382 av_channel_layout_uninit(&fmt);
111
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382 if (ret < 0)
112 return ret;
113
114 382 cur = next;
115 }
116
117 1880 return 0;
118 }
119
120 1880 static av_cold int init(AVFilterContext *ctx)
121 {
122 1880 AFormatContext *s = ctx->priv;
123 int ret;
124
125
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3845 PARSE_FORMATS(s->formats_str, enum AVSampleFormat, s->formats,
126 ff_add_format, av_get_sample_fmt, AV_SAMPLE_FMT_NONE, "sample format");
127
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2216 PARSE_FORMATS(s->sample_rates_str, int, s->sample_rates, ff_add_format,
128 get_sample_rate, 0, "sample rate");
129 1880 ret = parse_channel_layouts(ctx);
130
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1880 if (ret < 0)
131 return ret;
132
133 1880 return 0;
134 }
135
136 1880 static av_cold void uninit(AVFilterContext *ctx)
137 {
138 1880 AFormatContext *s = ctx->priv;
139
140 1880 ff_formats_unref(&s->formats);
141 1880 ff_formats_unref(&s->sample_rates);
142 1880 ff_channel_layouts_unref(&s->channel_layouts);
143 1880 }
144
145 1564 static int query_formats(AVFilterContext *ctx)
146 {
147 1564 AFormatContext *s = ctx->priv;
148 int ret;
149
150
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1564 ret = ff_set_common_formats(ctx, s->formats ? s->formats :
151 ff_all_formats(AVMEDIA_TYPE_AUDIO));
152 1564 s->formats = NULL;
153
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1564 if (ret < 0)
154 return ret;
155
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3060 ret = ff_set_common_samplerates(ctx, s->sample_rates ? s->sample_rates :
156 1496 ff_all_samplerates());
157 1564 s->sample_rates = NULL;
158
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1564 if (ret < 0)
159 return ret;
160
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3038 ret = ff_set_common_channel_layouts(ctx, s->channel_layouts ? s->channel_layouts :
161 1474 ff_all_channel_counts());
162 1564 s->channel_layouts = NULL;
163 1564 return ret;
164 }
165
166 const AVFilter ff_af_aformat = {
167 .name = "aformat",
168 .description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
169 .init = init,
170 .uninit = uninit,
171 .priv_size = sizeof(AFormatContext),
172 .priv_class = &aformat_class,
173 .flags = AVFILTER_FLAG_METADATA_ONLY,
174 FILTER_INPUTS(ff_audio_default_filterpad),
175 FILTER_OUTPUTS(ff_audio_default_filterpad),
176 FILTER_QUERY_FUNC(query_formats),
177 };
178