FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/sol.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 48 60 80.0%
Functions: 6 6 100.0%
Branches: 21 44 47.7%
Line Branch Exec Source
1 /*
2 * Sierra SOL demuxer
3 * Copyright Konstantin Shishkov
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 * Based on documents from Game Audio Player and own research
24 */
25
26 #include "libavutil/channel_layout.h"
27 #include "libavutil/intreadwrite.h"
28 #include "avformat.h"
29 #include "demux.h"
30 #include "internal.h"
31 #include "pcm.h"
32
33 /* if we don't know the size in advance */
34 #define AU_UNKNOWN_SIZE ((uint32_t)(~0))
35
36 7186 static int sol_probe(const AVProbeData *p)
37 {
38 /* check file header */
39 7186 uint16_t magic = AV_RL32(p->buf);
40
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 7186 if ((magic == 0x0B8D || magic == 0x0C0D || magic == 0x0C8D) &&
41
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 1 p->buf[2] == 'S' && p->buf[3] == 'O' &&
42
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 1 p->buf[4] == 'L' && p->buf[5] == 0)
43 1 return AVPROBE_SCORE_MAX;
44 else
45 7185 return 0;
46 }
47
48 #define SOL_DPCM 1
49 #define SOL_16BIT 4
50 #define SOL_STEREO 16
51
52 1 static enum AVCodecID sol_codec_id(int magic, int type)
53 {
54
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 1 if (type & SOL_DPCM)
55 1 return AV_CODEC_ID_SOL_DPCM;
56
57 ✗ if (magic == 0x0B8D)
58 ✗ return AV_CODEC_ID_PCM_U8;
59
60 ✗ if (type & SOL_16BIT)
61 ✗ return AV_CODEC_ID_PCM_S16LE;
62
63 ✗ return AV_CODEC_ID_PCM_U8;
64 }
65
66 1 static int sol_codec_type(int magic, int type)
67 {
68
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 1 if (magic == 0x0B8D) return 1;//SOL_DPCM_OLD;
69
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 1 if (type & SOL_DPCM)
70 {
71
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 1 if (type & SOL_16BIT) return 3;//SOL_DPCM_NEW16;
72 ✗ else if (magic == 0x0C8D) return 1;//SOL_DPCM_OLD;
73 ✗ else return 2;//SOL_DPCM_NEW8;
74 }
75 ✗ return -1;
76 }
77
78 1 static int sol_channels(int magic, int type)
79 {
80
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 1 if (magic == 0x0B8D || !(type & SOL_STEREO)) return 1;
81 1 return 2;
82 }
83
84 1 static int sol_read_header(AVFormatContext *s)
85 {
86 unsigned int magic,tag;
87 1 AVIOContext *pb = s->pb;
88 unsigned int id, channels, rate, type;
89 enum AVCodecID codec;
90 AVStream *st;
91
92 /* check ".snd" header */
93 1 magic = avio_rl16(pb);
94 1 tag = avio_rl32(pb);
95
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 1 if (tag != MKTAG('S', 'O', 'L', 0))
96 ✗ return -1;
97 1 rate = avio_rl16(pb);
98 1 type = avio_r8(pb);
99 1 avio_skip(pb, 4); /* size */
100
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 1 if (magic != 0x0B8D)
101 1 avio_r8(pb); /* newer SOLs contain padding byte */
102
103 1 codec = sol_codec_id(magic, type);
104 1 channels = sol_channels(magic, type);
105
106
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 1 if (codec == AV_CODEC_ID_SOL_DPCM)
107 1 id = sol_codec_type(magic, type);
108 ✗ else id = 0;
109
110 /* now we are ready: build format streams */
111 1 st = avformat_new_stream(s, NULL);
112
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 1 if (!st)
113 ✗ return -1;
114 1 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
115 1 st->codecpar->codec_tag = id;
116 1 st->codecpar->codec_id = codec;
117 1 av_channel_layout_default(&st->codecpar->ch_layout,channels);
118 1 st->codecpar->sample_rate = rate;
119 1 avpriv_set_pts_info(st, 64, 1, rate);
120 1 return 0;
121 }
122
123 #define MAX_SIZE 4096
124
125 75 static int sol_read_packet(AVFormatContext *s,
126 AVPacket *pkt)
127 {
128 int ret;
129
130
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 75 if (avio_feof(s->pb))
131 1 return AVERROR_EOF;
132
133 74 ret= av_get_packet(s->pb, pkt, MAX_SIZE);
134
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 74 if (ret < 0)
135 ✗ return ret;
136 74 pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
137 74 pkt->stream_index = 0;
138 74 return 0;
139 }
140
141 const FFInputFormat ff_sol_demuxer = {
142 .p.name = "sol",
143 .p.long_name = NULL_IF_CONFIG_SMALL("Sierra SOL"),
144 .read_probe = sol_probe,
145 .read_header = sol_read_header,
146 .read_packet = sol_read_packet,
147 .read_seek = ff_pcm_read_seek,
148 };
149