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 "demux.h"
27 #include "internal.h"
28 #include "avio_internal.h"
29 
30 enum SIFFTags {
31  TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
32  TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
33  TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
34  TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
35  TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
36  TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
37 };
38 
39 enum VBFlags {
40  VB_HAS_GMC = 0x01,
41  VB_HAS_AUDIO = 0x04,
42  VB_HAS_VIDEO = 0x08,
45 };
46 
47 typedef struct SIFFContext {
48  int frames;
49  int cur_frame;
50  int rate;
51  int bits;
53 
54  int has_video;
55  int has_audio;
56 
57  int curstrm;
58  unsigned int pktsize;
59  int gmcsize;
60  unsigned int sndsize;
61 
62  unsigned int flags;
63  uint8_t gmc[4];
64 } SIFFContext;
65 
66 static int siff_probe(const AVProbeData *p)
67 {
68  uint32_t tag = AV_RL32(p->buf + 8);
69  /* check file header */
70  if (AV_RL32(p->buf) != TAG_SIFF ||
71  (tag != TAG_VBV1 && tag != TAG_SOUN))
72  return 0;
73  return AVPROBE_SCORE_MAX;
74 }
75 
77 {
78  AVStream *ast;
79  ast = avformat_new_stream(s, NULL);
80  if (!ast)
81  return AVERROR(ENOMEM);
86  ast->codecpar->sample_rate = c->rate;
87  avpriv_set_pts_info(ast, 16, 1, c->rate);
88  ast->start_time = 0;
89  return 0;
90 }
91 
93 {
94  AVStream *st;
95  int width, height;
96 
97  if (avio_rl32(pb) != TAG_VBHD) {
98  av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
99  return AVERROR_INVALIDDATA;
100  }
101  if (avio_rb32(pb) != 32) {
102  av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
103  return AVERROR_INVALIDDATA;
104  }
105  if (avio_rl16(pb) != 1) {
106  av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
107  return AVERROR_INVALIDDATA;
108  }
109  width = avio_rl16(pb);
110  height = avio_rl16(pb);
111  avio_skip(pb, 4);
112  c->frames = avio_rl16(pb);
113  if (!c->frames) {
114  av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
115  return AVERROR_INVALIDDATA;
116  }
117  c->bits = avio_rl16(pb);
118  c->rate = avio_rl16(pb);
119  c->block_align = c->rate * (c->bits >> 3);
120 
121  avio_skip(pb, 16); // zeroes
122 
123  st = avformat_new_stream(s, NULL);
124  if (!st)
125  return AVERROR(ENOMEM);
128  st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
129  st->codecpar->width = width;
130  st->codecpar->height = height;
132  st->nb_frames =
133  st->duration = c->frames;
134  avpriv_set_pts_info(st, 16, 1, 12);
135 
136  c->cur_frame = 0;
137  c->has_video = 1;
138  c->has_audio = !!c->rate;
139  c->curstrm = -1;
140  if (c->has_audio)
141  return create_audio_stream(s, c);
142  return 0;
143 }
144 
146 {
147  if (avio_rl32(pb) != TAG_SHDR) {
148  av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
149  return AVERROR_INVALIDDATA;
150  }
151  if (avio_rb32(pb) != 8) {
152  av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
153  return AVERROR_INVALIDDATA;
154  }
155  avio_skip(pb, 4); // unknown value
156  c->rate = avio_rl16(pb);
157  c->bits = avio_rl16(pb);
158  c->block_align = c->rate * (c->bits >> 3);
159  return create_audio_stream(s, c);
160 }
161 
163 {
164  AVIOContext *pb = s->pb;
165  SIFFContext *c = s->priv_data;
166  uint32_t tag;
167  int ret;
168 
169  if (avio_rl32(pb) != TAG_SIFF)
170  return AVERROR_INVALIDDATA;
171  avio_skip(pb, 4); // ignore size
172  tag = avio_rl32(pb);
173 
174  if (tag != TAG_VBV1 && tag != TAG_SOUN) {
175  av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
176  return AVERROR_INVALIDDATA;
177  }
178 
179  if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
180  return ret;
181  if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
182  return ret;
183  if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
184  av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
185  return AVERROR_INVALIDDATA;
186  }
187  avio_skip(pb, 4); // ignore size
188 
189  return 0;
190 }
191 
193 {
194  SIFFContext *c = s->priv_data;
195  int ret;
196 
197  if (c->has_video) {
198  unsigned int size;
199  if (c->cur_frame >= c->frames)
200  return AVERROR_EOF;
201  if (c->curstrm == -1) {
202  unsigned pktsize = avio_rl32(s->pb);
203  if (pktsize < 4)
204  return AVERROR_INVALIDDATA;
205  c->pktsize = pktsize - 4;
206  c->flags = avio_rl16(s->pb);
207  if (c->flags & VB_HAS_AUDIO && !c->has_audio)
208  return AVERROR_INVALIDDATA;
209  c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
210  if (c->gmcsize)
211  avio_read(s->pb, c->gmc, c->gmcsize);
212  c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
213  c->curstrm = !!(c->flags & VB_HAS_AUDIO);
214  }
215 
216  if (!c->curstrm) {
217  if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
218  return AVERROR_INVALIDDATA;
219 
220  size = c->pktsize - c->sndsize - c->gmcsize - 2;
221  size = ffio_limit(s->pb, size);
222  if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
223  return ret;
224  AV_WL16(pkt->data, c->flags);
225  if (c->gmcsize)
226  memcpy(pkt->data + 2, c->gmc, c->gmcsize);
227  if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
228  return AVERROR_INVALIDDATA;
229  }
230  pkt->stream_index = 0;
231  c->curstrm = -1;
232  } else {
233  int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
234  if (pktsize < 0)
235  return AVERROR(EIO);
236  pkt->stream_index = 1;
237  pkt->duration = pktsize;
238  c->curstrm = 0;
239  }
240  if (!c->cur_frame || c->curstrm)
242  if (c->curstrm == -1)
243  c->cur_frame++;
244  } else {
245  int pktsize = av_get_packet(s->pb, pkt, c->block_align);
246  if (!pktsize)
247  return AVERROR_EOF;
248  if (pktsize <= 0)
249  return AVERROR(EIO);
250  pkt->duration = pktsize;
251  }
252  return pkt->size;
253 }
254 
256  .p.name = "siff",
257  .p.long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
258  .p.extensions = "vb,son",
259  .priv_data_size = sizeof(SIFFContext),
263 };
SIFFContext::pktsize
unsigned int pktsize
Definition: siff.c:58
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
SIFFContext::flags
unsigned int flags
Definition: siff.c:62
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
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:162
AVPacket::data
uint8_t * data
Definition: packet.h:539
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:557
TAG_SIFF
@ TAG_SIFF
Definition: siff.c:31
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
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:145
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:594
SIFFContext::frames
int frames
Definition: siff.c:48
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
VB_HAS_GMC
@ VB_HAS_GMC
Definition: siff.c:40
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:862
VBFlags
VBFlags
Definition: vb.c:33
TAG_VBV1
@ TAG_VBV1
Definition: siff.c:35
SIFFContext::gmc
uint8_t gmc[4]
Definition: siff.c:63
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:807
SIFFContext
Definition: siff.c:47
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:714
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:761
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:42
VB_HAS_AUDIO
@ VB_HAS_AUDIO
Definition: siff.c:41
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
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: packet.c:98
SIFFContext::sndsize
unsigned int sndsize
Definition: siff.c:60
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:134
SIFFContext::rate
int rate
Definition: siff.c:50
ff_siff_demuxer
const FFInputFormat ff_siff_demuxer
Definition: siff.c:255
SIFFContext::curstrm
int curstrm
Definition: siff.c:57
SIFFContext::cur_frame
int cur_frame
Definition: siff.c:49
AVFormatContext
Format I/O context.
Definition: avformat.h:1300
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:771
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:538
NULL
#define NULL
Definition: coverity.c:32
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
create_audio_stream
static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
Definition: siff.c:76
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
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:184
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:809
VB_HAS_VIDEO
@ VB_HAS_VIDEO
Definition: siff.c:42
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:730
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
TAG_SOUN
@ TAG_SOUN
Definition: siff.c:36
AVPacket::size
int size
Definition: packet.h:540
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:94
height
#define height
Definition: dsp.h:85
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:311
SIFFContext::bits
int bits
Definition: siff.c:51
size
int size
Definition: twinvq_data.h:10344
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:408
TAG_VBHD
@ TAG_VBHD
Definition: siff.c:33
VB_HAS_PALETTE
@ VB_HAS_PALETTE
Definition: siff.c:43
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
SIFFContext::has_audio
int has_audio
Definition: siff.c:55
ffio_limit
int ffio_limit(AVIOContext *s, int size)
Definition: aviobuf.c:1061
avio_internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:135
SIFFContext::gmcsize
int gmcsize
Definition: siff.c:59
demux.h
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:91
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:84
tag
uint32_t tag
Definition: movenc.c:1876
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:748
avformat.h
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:66
SIFFContext::has_video
int has_video
Definition: siff.c:54
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:612
AVPacket::stream_index
int stream_index
Definition: packet.h:541
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
TAG_BODY
@ TAG_BODY
Definition: siff.c:32
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:333
TAG_SHDR
@ TAG_SHDR
Definition: siff.c:34
AVCodecParameters::format
int format
Definition: codec_par.h:92
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:386
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:516
FFInputFormat
Definition: demux.h:37
SIFFContext::block_align
int block_align
Definition: siff.c:52
SIFFTags
SIFFTags
Definition: siff.c:30
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:192
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:797
siff_parse_vbv1
static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
Definition: siff.c:92
width
#define width
Definition: dsp.h:85
VB_HAS_LENGTH
@ VB_HAS_LENGTH
Definition: siff.c:44