FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/afc.c
Date: 2024-05-26 22:00:00
Exec Total Coverage
Lines: 0 26 0.0%
Functions: 0 2 0.0%
Branches: 0 6 0.0%

Line Branch Exec Source
1 /*
2 * AFC demuxer
3 * Copyright (c) 2012 Paul B Mahol
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 "avformat.h"
24 #include "demux.h"
25 #include "internal.h"
26
27 typedef struct AFCDemuxContext {
28 int64_t data_end;
29 } AFCDemuxContext;
30
31 static int afc_read_header(AVFormatContext *s)
32 {
33 AFCDemuxContext *c = s->priv_data;
34 AVStream *st;
35 int ret;
36
37 st = avformat_new_stream(s, NULL);
38 if (!st)
39 return AVERROR(ENOMEM);
40 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
41 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AFC;
42 st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
43
44 if ((ret = ff_alloc_extradata(st->codecpar, 1)) < 0)
45 return ret;
46 st->codecpar->extradata[0] = 8 * st->codecpar->ch_layout.nb_channels;
47
48 c->data_end = avio_rb32(s->pb) + 32LL;
49 st->duration = avio_rb32(s->pb);
50 st->codecpar->sample_rate = avio_rb16(s->pb);
51 avio_skip(s->pb, 22);
52 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
53
54 return 0;
55 }
56
57 static int afc_read_packet(AVFormatContext *s, AVPacket *pkt)
58 {
59 AFCDemuxContext *c = s->priv_data;
60 int64_t size = c->data_end - avio_tell(s->pb);
61 int ret;
62
63 size = FFMIN(size, 18 * 128);
64 if (size <= 0)
65 return AVERROR_EOF;
66
67 ret = av_get_packet(s->pb, pkt, size);
68 pkt->stream_index = 0;
69 return ret;
70 }
71
72 const FFInputFormat ff_afc_demuxer = {
73 .p.name = "afc",
74 .p.long_name = NULL_IF_CONFIG_SMALL("AFC"),
75 .p.extensions = "afc",
76 .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK,
77 .priv_data_size = sizeof(AFCDemuxContext),
78 .read_header = afc_read_header,
79 .read_packet = afc_read_packet,
80 };
81