FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/af_asetnsamples.c
Date: 2025-10-19 14:07:46
Exec Total Coverage
Lines: 27 36 75.0%
Functions: 1 1 100.0%
Branches: 17 24 70.8%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Andrey Utkin
3 * Copyright (c) 2012 Stefano Sabatini
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (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 GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Filter that changes number of samples on single output operation
25 */
26
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "avfilter.h"
30 #include "audio.h"
31 #include "filters.h"
32
33 typedef struct ASNSContext {
34 const AVClass *class;
35 int nb_out_samples; ///< how many samples to output
36 int pad;
37 } ASNSContext;
38
39 #define OFFSET(x) offsetof(ASNSContext, x)
40 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
41
42 static const AVOption asetnsamples_options[] = {
43 { "nb_out_samples", "set the number of per-frame output samples", OFFSET(nb_out_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
44 { "n", "set the number of per-frame output samples", OFFSET(nb_out_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
45 { "pad", "pad last frame with zeros", OFFSET(pad), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
46 { "p", "pad last frame with zeros", OFFSET(pad), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
47 { NULL }
48 };
49
50 AVFILTER_DEFINE_CLASS(asetnsamples);
51
52 2964 static int activate(AVFilterContext *ctx)
53 {
54 2964 AVFilterLink *inlink = ctx->inputs[0];
55 2964 AVFilterLink *outlink = ctx->outputs[0];
56 2964 ASNSContext *s = ctx->priv;
57 2964 AVFrame *frame = NULL, *pad_frame;
58 int ret;
59
60
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 2964 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
61
62
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 2964 if (ctx->is_disabled)
63 ✗ ret = ff_inlink_consume_frame(inlink, &frame);
64 else
65 2964 ret = ff_inlink_consume_samples(inlink, s->nb_out_samples, s->nb_out_samples, &frame);
66
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 2964 if (ret < 0)
67 ✗ return ret;
68
69
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 2964 if (ret > 0) {
70
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 1596 if (!s->pad || ctx->is_disabled || frame->nb_samples == s->nb_out_samples)
71 1594 return ff_filter_frame(outlink, frame);
72
73 2 pad_frame = ff_get_audio_buffer(outlink, s->nb_out_samples);
74
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 2 if (!pad_frame) {
75 ✗ av_frame_free(&frame);
76 ✗ return AVERROR(ENOMEM);
77 }
78
79 2 ret = av_frame_copy_props(pad_frame, frame);
80
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 2 if (ret < 0) {
81 ✗ av_frame_free(&pad_frame);
82 ✗ av_frame_free(&frame);
83 ✗ return ret;
84 }
85
86 2 av_samples_copy(pad_frame->extended_data, frame->extended_data,
87 2 0, 0, frame->nb_samples, frame->ch_layout.nb_channels, frame->format);
88 2 av_samples_set_silence(pad_frame->extended_data, frame->nb_samples,
89 2 s->nb_out_samples - frame->nb_samples, frame->ch_layout.nb_channels,
90 2 frame->format);
91 2 av_frame_free(&frame);
92 2 return ff_filter_frame(outlink, pad_frame);
93 }
94
95
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 1368 FF_FILTER_FORWARD_STATUS(inlink, outlink);
96
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 1311 if (ff_inlink_queued_samples(inlink) >= s->nb_out_samples) {
97 ✗ ff_filter_set_ready(ctx, 100);
98 ✗ return 0;
99 }
100
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 1311 FF_FILTER_FORWARD_WANTED(outlink, inlink);
101
102 18 return FFERROR_NOT_READY;
103 }
104
105 const FFFilter ff_af_asetnsamples = {
106 .p.name = "asetnsamples",
107 .p.description = NULL_IF_CONFIG_SMALL("Set the number of samples for each output audio frames."),
108 .p.priv_class = &asetnsamples_class,
109 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
110 .priv_size = sizeof(ASNSContext),
111 FILTER_INPUTS(ff_audio_default_filterpad),
112 FILTER_OUTPUTS(ff_audio_default_filterpad),
113 .activate = activate,
114 .process_command = ff_filter_process_command,
115 };
116