1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* FSB demuxer
* Copyright (c) 2015 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include "internal.h"
static int fsb_probe(AVProbeData *p)
{
if (memcmp(p->buf, "FSB", 3) || p->buf[3] - '0' < 1 || p->buf[3] - '0' > 5)
return 0;
if (AV_RL32(p->buf + 4) != 1)
return 0;
return AVPROBE_SCORE_MAX;
}
static int fsb_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
unsigned format, version, c;
int64_t offset;
AVCodecParameters *par;
AVStream *st = avformat_new_stream(s, NULL);
avio_skip(pb, 3); // "FSB"
version = avio_r8(pb) - '0';
if (version != 4 && version != 3) {
avpriv_request_sample(s, "version %d", version);
return AVERROR_PATCHWELCOME;
}
avio_skip(pb, 4);
if (!st)
return AVERROR(ENOMEM);
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_tag = 0;
if (version == 3) {
offset = avio_rl32(pb) + 0x18;
avio_skip(pb, 44);
st->duration = avio_rl32(pb);
avio_skip(pb, 12);
format = avio_rl32(pb);
par->sample_rate = avio_rl32(pb);
if (par->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
par->channels = avio_rl16(pb);
if (!par->channels)
return AVERROR_INVALIDDATA;
if (format & 0x00000100) {
par->codec_id = AV_CODEC_ID_PCM_S16LE;
par->block_align = 4096 * par->channels;
} else if (format & 0x00400000) {
par->bits_per_coded_sample = 4;
par->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV;
par->block_align = 36 * par->channels;
} else if (format & 0x00800000) {
par->codec_id = AV_CODEC_ID_ADPCM_PSX;
par->block_align = 16 * par->channels;
} else if (format & 0x02000000) {
par->codec_id = AV_CODEC_ID_ADPCM_THP;
par->block_align = 8 * par->channels;
if (par->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ff_alloc_extradata(par, 32 * par->channels);
if (!par->extradata)
return AVERROR(ENOMEM);
avio_seek(pb, 0x68, SEEK_SET);
for (c = 0; c < par->channels; c++) {
avio_read(pb, par->extradata + 32 * c, 32);
avio_skip(pb, 14);
}
} else {
avpriv_request_sample(s, "format 0x%X", format);
return AVERROR_PATCHWELCOME;
}
} else if (version == 4) {
offset = avio_rl32(pb) + 0x30;
avio_skip(pb, 80);
st->duration = avio_rl32(pb);
format = avio_rb32(pb);
switch(format) {
case 0x40001001:
case 0x00001005:
case 0x40001081:
case 0x40200001:
par->codec_id = AV_CODEC_ID_XMA2;
break;
case 0x40000802:
par->codec_id = AV_CODEC_ID_ADPCM_THP;
break;
default:
avpriv_request_sample(s, "format 0x%X", format);
return AVERROR_PATCHWELCOME;
}
par->sample_rate = avio_rl32(pb);
if (par->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
par->channels = avio_rl16(pb);
if (!par->channels)
return AVERROR_INVALIDDATA;
switch (par->codec_id) {
case AV_CODEC_ID_XMA2:
ff_alloc_extradata(par, 34);
if (!par->extradata)
return AVERROR(ENOMEM);
memset(par->extradata, 0, 34);
par->block_align = 2048;
break;
case AV_CODEC_ID_ADPCM_THP:
if (par->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ff_alloc_extradata(par, 32 * par->channels);
if (!par->extradata)
return AVERROR(ENOMEM);
avio_seek(pb, 0x80, SEEK_SET);
for (c = 0; c < par->channels; c++) {
avio_read(pb, par->extradata + 32 * c, 32);
avio_skip(pb, 14);
}
par->block_align = 8 * par->channels;
break;
}
} else {
av_assert0(0);
}
avio_skip(pb, offset - avio_tell(pb));
s->internal->data_offset = avio_tell(pb);
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
return 0;
}
static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecParameters *par = s->streams[0]->codecpar;
int64_t pos;
int ret;
if (avio_feof(s->pb))
return AVERROR_EOF;
pos = avio_tell(s->pb);
if (par->codec_id == AV_CODEC_ID_ADPCM_THP &&
par->channels > 1) {
int i, ch;
ret = av_new_packet(pkt, par->block_align);
if (ret < 0)
return ret;
for (i = 0; i < 4; i++) {
for (ch = 0; ch < par->channels; ch++) {
pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
}
}
ret = 0;
} else {
ret = av_get_packet(s->pb, pkt, par->block_align);
}
if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
pkt->duration = (pkt->data[0] >> 2) * 512;
pkt->pos = pos;
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_fsb_demuxer = {
.name = "fsb",
.long_name = NULL_IF_CONFIG_SMALL("FMOD Sample Bank"),
.read_probe = fsb_probe,
.read_header = fsb_read_header,
.read_packet = fsb_read_packet,
.extensions = "fsb",
.flags = AVFMT_GENERIC_INDEX,
};
|
