FFmpeg
siff.c
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1 /*
2  * Beam Software SIFF demuxer
3  * Copyright (c) 2007 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 
23 #include "libavutil/intreadwrite.h"
24 
25 #include "avformat.h"
26 #include "internal.h"
27 #include "avio_internal.h"
28 
29 enum SIFFTags {
30  TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
31  TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
32  TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
33  TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
34  TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
35  TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
36 };
37 
38 enum VBFlags {
39  VB_HAS_GMC = 0x01,
40  VB_HAS_AUDIO = 0x04,
41  VB_HAS_VIDEO = 0x08,
44 };
45 
46 typedef struct SIFFContext {
47  int frames;
48  int cur_frame;
49  int rate;
50  int bits;
52 
53  int has_video;
54  int has_audio;
55 
56  int curstrm;
57  unsigned int pktsize;
58  int gmcsize;
59  unsigned int sndsize;
60 
61  unsigned int flags;
62  uint8_t gmc[4];
63 } SIFFContext;
64 
65 static int siff_probe(const AVProbeData *p)
66 {
67  uint32_t tag = AV_RL32(p->buf + 8);
68  /* check file header */
69  if (AV_RL32(p->buf) != TAG_SIFF ||
70  (tag != TAG_VBV1 && tag != TAG_SOUN))
71  return 0;
72  return AVPROBE_SCORE_MAX;
73 }
74 
76 {
77  AVStream *ast;
78  ast = avformat_new_stream(s, NULL);
79  if (!ast)
80  return AVERROR(ENOMEM);
85  ast->codecpar->sample_rate = c->rate;
86  avpriv_set_pts_info(ast, 16, 1, c->rate);
87  ast->start_time = 0;
88  return 0;
89 }
90 
92 {
93  AVStream *st;
94  int width, height;
95 
96  if (avio_rl32(pb) != TAG_VBHD) {
97  av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
98  return AVERROR_INVALIDDATA;
99  }
100  if (avio_rb32(pb) != 32) {
101  av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
102  return AVERROR_INVALIDDATA;
103  }
104  if (avio_rl16(pb) != 1) {
105  av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
106  return AVERROR_INVALIDDATA;
107  }
108  width = avio_rl16(pb);
109  height = avio_rl16(pb);
110  avio_skip(pb, 4);
111  c->frames = avio_rl16(pb);
112  if (!c->frames) {
113  av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
114  return AVERROR_INVALIDDATA;
115  }
116  c->bits = avio_rl16(pb);
117  c->rate = avio_rl16(pb);
118  c->block_align = c->rate * (c->bits >> 3);
119 
120  avio_skip(pb, 16); // zeroes
121 
122  st = avformat_new_stream(s, NULL);
123  if (!st)
124  return AVERROR(ENOMEM);
127  st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
128  st->codecpar->width = width;
129  st->codecpar->height = height;
131  st->nb_frames =
132  st->duration = c->frames;
133  avpriv_set_pts_info(st, 16, 1, 12);
134 
135  c->cur_frame = 0;
136  c->has_video = 1;
137  c->has_audio = !!c->rate;
138  c->curstrm = -1;
139  if (c->has_audio)
140  return create_audio_stream(s, c);
141  return 0;
142 }
143 
145 {
146  if (avio_rl32(pb) != TAG_SHDR) {
147  av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
148  return AVERROR_INVALIDDATA;
149  }
150  if (avio_rb32(pb) != 8) {
151  av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
152  return AVERROR_INVALIDDATA;
153  }
154  avio_skip(pb, 4); // unknown value
155  c->rate = avio_rl16(pb);
156  c->bits = avio_rl16(pb);
157  c->block_align = c->rate * (c->bits >> 3);
158  return create_audio_stream(s, c);
159 }
160 
162 {
163  AVIOContext *pb = s->pb;
164  SIFFContext *c = s->priv_data;
165  uint32_t tag;
166  int ret;
167 
168  if (avio_rl32(pb) != TAG_SIFF)
169  return AVERROR_INVALIDDATA;
170  avio_skip(pb, 4); // ignore size
171  tag = avio_rl32(pb);
172 
173  if (tag != TAG_VBV1 && tag != TAG_SOUN) {
174  av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
175  return AVERROR_INVALIDDATA;
176  }
177 
178  if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
179  return ret;
180  if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
181  return ret;
182  if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
183  av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
184  return AVERROR_INVALIDDATA;
185  }
186  avio_skip(pb, 4); // ignore size
187 
188  return 0;
189 }
190 
192 {
193  SIFFContext *c = s->priv_data;
194  int ret;
195 
196  if (c->has_video) {
197  unsigned int size;
198  if (c->cur_frame >= c->frames)
199  return AVERROR_EOF;
200  if (c->curstrm == -1) {
201  c->pktsize = avio_rl32(s->pb) - 4;
202  c->flags = avio_rl16(s->pb);
203  if (c->flags & VB_HAS_AUDIO && !c->has_audio)
204  return AVERROR_INVALIDDATA;
205  c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
206  if (c->gmcsize)
207  avio_read(s->pb, c->gmc, c->gmcsize);
208  c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
209  c->curstrm = !!(c->flags & VB_HAS_AUDIO);
210  }
211 
212  if (!c->curstrm) {
213  if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
214  return AVERROR_INVALIDDATA;
215 
216  size = c->pktsize - c->sndsize - c->gmcsize - 2;
217  size = ffio_limit(s->pb, size);
218  if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
219  return ret;
220  AV_WL16(pkt->data, c->flags);
221  if (c->gmcsize)
222  memcpy(pkt->data + 2, c->gmc, c->gmcsize);
223  if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
224  return AVERROR_INVALIDDATA;
225  }
226  pkt->stream_index = 0;
227  c->curstrm = -1;
228  } else {
229  int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
230  if (pktsize < 0)
231  return AVERROR(EIO);
232  pkt->stream_index = 1;
233  pkt->duration = pktsize;
234  c->curstrm = 0;
235  }
236  if (!c->cur_frame || c->curstrm)
238  if (c->curstrm == -1)
239  c->cur_frame++;
240  } else {
241  int pktsize = av_get_packet(s->pb, pkt, c->block_align);
242  if (!pktsize)
243  return AVERROR_EOF;
244  if (pktsize <= 0)
245  return AVERROR(EIO);
246  pkt->duration = pktsize;
247  }
248  return pkt->size;
249 }
250 
252  .name = "siff",
253  .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
254  .priv_data_size = sizeof(SIFFContext),
258  .extensions = "vb,son",
259 };
SIFFContext::pktsize
unsigned int pktsize
Definition: siff.c:57
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
SIFFContext::flags
unsigned int flags
Definition: siff.c:61
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
siff_read_header
static int siff_read_header(AVFormatContext *s)
Definition: siff.c:161
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:356
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
TAG_SIFF
@ TAG_SIFF
Definition: siff.c:30
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:65
AV_CODEC_ID_VB
@ AV_CODEC_ID_VB
Definition: codec_id.h:160
siff_parse_soun
static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
Definition: siff.c:144
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
SIFFContext::frames
int frames
Definition: siff.c:47
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
VB_HAS_GMC
@ VB_HAS_GMC
Definition: siff.c:39
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:763
VBFlags
VBFlags
Definition: vb.c:32
TAG_VBV1
@ TAG_VBV1
Definition: siff.c:34
SIFFContext::gmc
uint8_t gmc[4]
Definition: siff.c:62
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
SIFFContext
Definition: siff.c:46
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:743
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:656
VB_HAS_AUDIO
@ VB_HAS_AUDIO
Definition: siff.c:40
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:97
SIFFContext::sndsize
unsigned int sndsize
Definition: siff.c:59
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:127
SIFFContext::rate
int rate
Definition: siff.c:49
SIFFContext::curstrm
int curstrm
Definition: siff.c:56
SIFFContext::cur_frame
int cur_frame
Definition: siff.c:48
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
NULL
#define NULL
Definition: coverity.c:32
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
create_audio_stream
static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
Definition: siff.c:75
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:1000
VB_HAS_VIDEO
@ VB_HAS_VIDEO
Definition: siff.c:41
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
TAG_SOUN
@ TAG_SOUN
Definition: siff.c:35
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:293
SIFFContext::bits
int bits
Definition: siff.c:50
size
int size
Definition: twinvq_data.h:10344
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
TAG_VBHD
@ TAG_VBHD
Definition: siff.c:32
height
#define height
VB_HAS_PALETTE
@ VB_HAS_PALETTE
Definition: siff.c:42
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
SIFFContext::has_audio
int has_audio
Definition: siff.c:54
ffio_limit
int ffio_limit(AVIOContext *s, int size)
Definition: aviobuf.c:1093
avio_internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:128
SIFFContext::gmcsize
int gmcsize
Definition: siff.c:58
av_get_packet
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:102
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
tag
uint32_t tag
Definition: movenc.c:1646
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
avformat.h
ff_siff_demuxer
const AVInputFormat ff_siff_demuxer
Definition: siff.c:251
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
siff_probe
static int siff_probe(const AVProbeData *p)
Definition: siff.c:65
SIFFContext::has_video
int has_video
Definition: siff.c:53
channel_layout.h
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
TAG_BODY
@ TAG_BODY
Definition: siff.c:31
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:103
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:330
TAG_SHDR
@ TAG_SHDR
Definition: siff.c:33
AVCodecParameters::format
int format
Definition: codec_par.h:85
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
SIFFContext::block_align
int block_align
Definition: siff.c:51
SIFFTags
SIFFTags
Definition: siff.c:29
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
siff_read_packet
static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: siff.c:191
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:988
siff_parse_vbv1
static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
Definition: siff.c:91
VB_HAS_LENGTH
@ VB_HAS_LENGTH
Definition: siff.c:43