FFmpeg  4.3.8
fsb.c
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1 /*
2  * FSB demuxer
3  * Copyright (c) 2015 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/avassert.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "avio.h"
26 #include "internal.h"
27 
28 static int fsb_probe(const AVProbeData *p)
29 {
30  if (memcmp(p->buf, "FSB", 3) || p->buf[3] - '0' < 1 || p->buf[3] - '0' > 5)
31  return 0;
32  if (AV_RL32(p->buf + 4) != 1)
33  return 0;
34  return AVPROBE_SCORE_MAX;
35 }
36 
38 {
39  AVIOContext *pb = s->pb;
40  unsigned format, version, c;
42  AVCodecParameters *par;
44  int ret;
45 
46  avio_skip(pb, 3); // "FSB"
47  version = avio_r8(pb) - '0';
48  if (version != 4 && version != 3) {
49  avpriv_request_sample(s, "version %d", version);
50  return AVERROR_PATCHWELCOME;
51  }
52 
53  avio_skip(pb, 4);
54 
55  if (!st)
56  return AVERROR(ENOMEM);
57  par = st->codecpar;
59  par->codec_tag = 0;
60 
61  if (version == 3) {
62  offset = avio_rl32(pb) + 0x18;
63  avio_skip(pb, 44);
64  st->duration = avio_rl32(pb);
65  avio_skip(pb, 12);
66  format = avio_rl32(pb);
67  par->sample_rate = avio_rl32(pb);
68  if (par->sample_rate <= 0)
69  return AVERROR_INVALIDDATA;
70  avio_skip(pb, 6);
71  par->channels = avio_rl16(pb);
72  if (!par->channels)
73  return AVERROR_INVALIDDATA;
74 
75  if (format & 0x00000100) {
77  par->block_align = 4096 * par->channels;
78  } else if (format & 0x00400000) {
79  par->bits_per_coded_sample = 4;
81  par->block_align = 36 * par->channels;
82  } else if (format & 0x00800000) {
84  par->block_align = 16 * par->channels;
85  } else if (format & 0x02000000) {
87  par->block_align = 8 * par->channels;
88  if (par->channels > INT_MAX / 32)
89  return AVERROR_INVALIDDATA;
90  ret = ff_alloc_extradata(par, 32 * par->channels);
91  if (ret < 0)
92  return ret;
93  avio_seek(pb, 0x68, SEEK_SET);
94  for (c = 0; c < par->channels; c++) {
95  avio_read(pb, par->extradata + 32 * c, 32);
96  avio_skip(pb, 14);
97  }
98  } else {
99  avpriv_request_sample(s, "format 0x%X", format);
100  return AVERROR_PATCHWELCOME;
101  }
102  } else if (version == 4) {
103  offset = avio_rl32(pb) + 0x30;
104  avio_skip(pb, 80);
105  st->duration = avio_rl32(pb);
106 
107  format = avio_rb32(pb);
108  switch(format) {
109  case 0x40001001:
110  case 0x00001005:
111  case 0x40001081:
112  case 0x40200001:
113  par->codec_id = AV_CODEC_ID_XMA2;
114  break;
115  case 0x40000802:
117  break;
118  default:
119  avpriv_request_sample(s, "format 0x%X", format);
120  return AVERROR_PATCHWELCOME;
121  }
122 
123  par->sample_rate = avio_rl32(pb);
124  if (par->sample_rate <= 0)
125  return AVERROR_INVALIDDATA;
126  avio_skip(pb, 6);
127 
128  par->channels = avio_rl16(pb);
129  if (!par->channels)
130  return AVERROR_INVALIDDATA;
131 
132  switch (par->codec_id) {
133  case AV_CODEC_ID_XMA2:
134  ret = ff_alloc_extradata(par, 34);
135  if (ret < 0)
136  return ret;
137  memset(par->extradata, 0, 34);
138  par->block_align = 2048;
139  break;
141  if (par->channels > INT_MAX / 32)
142  return AVERROR_INVALIDDATA;
143  ret = ff_alloc_extradata(par, 32 * par->channels);
144  if (ret < 0)
145  return ret;
146  avio_seek(pb, 0x80, SEEK_SET);
147  for (c = 0; c < par->channels; c++) {
148  avio_read(pb, par->extradata + 32 * c, 32);
149  avio_skip(pb, 14);
150  }
151  par->block_align = 8 * par->channels;
152  break;
153  }
154  } else {
155  av_assert0(0);
156  }
157 
158  avio_skip(pb, offset - avio_tell(pb));
159  s->internal->data_offset = avio_tell(pb);
160 
161  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
162 
163  return 0;
164 }
165 
167 {
168  AVCodecParameters *par = s->streams[0]->codecpar;
169  int64_t pos;
170  int ret;
171 
172  if (avio_feof(s->pb))
173  return AVERROR_EOF;
174 
175  pos = avio_tell(s->pb);
176  if (par->codec_id == AV_CODEC_ID_ADPCM_THP &&
177  par->channels > 1) {
178  int i, ch;
179 
180  ret = av_new_packet(pkt, par->block_align);
181  if (ret < 0)
182  return ret;
183  for (i = 0; i < 4; i++) {
184  for (ch = 0; ch < par->channels; ch++) {
185  pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
186  pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
187  }
188  }
189  ret = 0;
190  } else {
191  ret = av_get_packet(s->pb, pkt, par->block_align);
192  }
193 
194  if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
195  pkt->duration = (pkt->data[0] >> 2) * 512;
196 
197  pkt->pos = pos;
198  pkt->stream_index = 0;
199 
200  return ret;
201 }
202 
204  .name = "fsb",
205  .long_name = NULL_IF_CONFIG_SMALL("FMOD Sample Bank"),
206  .read_probe = fsb_probe,
207  .read_header = fsb_read_header,
208  .read_packet = fsb_read_packet,
209  .extensions = "fsb",
210  .flags = AVFMT_GENERIC_INDEX,
211 };
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
Buffered I/O operations.
version
Definition: libkvazaar.c:292
static const char * format[]
Definition: af_aiir.c:339
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4948
#define avpriv_request_sample(...)
int64_t data_offset
offset of the first packet
Definition: internal.h:80
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int size
Definition: packet.h:356
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
Format I/O context.
Definition: avformat.h:1351
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
uint8_t * data
Definition: packet.h:355
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:307
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
unsigned int pos
Definition: spdifenc.c:412
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
simple assert() macros that are a bit more flexible than ISO C assert().
static int fsb_probe(const AVProbeData *p)
Definition: fsb.c:28
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int block_align
Audio only.
Definition: codec_par.h:177
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3328
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_RL32
Definition: intreadwrite.h:146
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
long long int64_t
Definition: coverity.c:34
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: fsb.c:166
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
Main libavformat public API header.
static int fsb_read_header(AVFormatContext *s)
Definition: fsb.c:37
static double c[64]
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
AVInputFormat ff_fsb_demuxer
Definition: fsb.c:203
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int stream_index
Definition: packet.h:357
This structure stores compressed data.
Definition: packet.h:332