FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/adp.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 34 36 94.4%
Functions: 3 3 100.0%
Branches: 18 22 81.8%

Line Branch Exec Source
1 /*
2 * ADP demuxer
3 * Copyright (c) 2013 James Almer
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 #include "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "internal.h"
26
27 6782 static int adp_probe(const AVProbeData *p)
28 {
29 6782 int i, changes = 0;
30 6782 uint8_t last = 0;
31
32
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6782 if (p->buf_size < 32)
33 return 0;
34
35
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922464 for (i = 0; i < p->buf_size - 3; i+=32) {
36
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921771 if (p->buf[i] != p->buf[i+2] || p->buf[i+1] != p->buf[i+3])
37 6089 return 0;
38
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915682 if (p->buf[i] != last)
39 908472 changes++;
40 915682 last = p->buf[i];
41 }
42
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693 if (changes <= 1)
43 4 return 0;
44
45
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689 return p->buf_size < 260 ? 1 : AVPROBE_SCORE_MAX / 4;
46 }
47
48 1 static int adp_read_header(AVFormatContext *s)
49 {
50 AVStream *st;
51
52 1 st = avformat_new_stream(s, NULL);
53
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1 if (!st)
54 return AVERROR(ENOMEM);
55
56 1 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
57 1 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK;
58 1 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
59 1 st->codecpar->sample_rate = 48000;
60 1 st->start_time = 0;
61
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1 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
62 1 st->duration = av_get_audio_frame_duration2(st->codecpar, avio_size(s->pb));
63
64 1 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
65
66 1 return 0;
67 }
68
69 34 static int adp_read_packet(AVFormatContext *s, AVPacket *pkt)
70 {
71 34 int ret, size = 1024;
72
73
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34 if (avio_feof(s->pb))
74 1 return AVERROR_EOF;
75
76 33 ret = av_get_packet(s->pb, pkt, size);
77
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33 if (ret < 0)
78 1 return ret;
79
80 32 pkt->stream_index = 0;
81
82 32 return ret;
83 }
84
85 const AVInputFormat ff_adp_demuxer = {
86 .name = "adp",
87 .long_name = NULL_IF_CONFIG_SMALL("ADP"),
88 .read_probe = adp_probe,
89 .read_header = adp_read_header,
90 .read_packet = adp_read_packet,
91 .extensions = "adp,dtk",
92 };
93