Libav
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 Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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 
28 enum SIFFTags {
29  TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
30  TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
31  TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
32  TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
33  TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
34  TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
35 };
36 
37 enum VBFlags {
38  VB_HAS_GMC = 0x01,
39  VB_HAS_AUDIO = 0x04,
40  VB_HAS_VIDEO = 0x08,
43 };
44 
45 typedef struct SIFFContext {
46  int frames;
47  int cur_frame;
48  int rate;
49  int bits;
51 
52  int has_video;
53  int has_audio;
54 
55  int curstrm;
56  unsigned int pktsize;
57  int gmcsize;
58  int sndsize;
59 
60  unsigned int flags;
62 } SIFFContext;
63 
64 static int siff_probe(AVProbeData *p)
65 {
66  uint32_t tag = AV_RL32(p->buf + 8);
67  /* check file header */
68  if (AV_RL32(p->buf) != TAG_SIFF ||
69  (tag != TAG_VBV1 && tag != TAG_SOUN))
70  return 0;
71  return AVPROBE_SCORE_MAX;
72 }
73 
75 {
76  AVStream *ast;
77  ast = avformat_new_stream(s, NULL);
78  if (!ast)
79  return AVERROR(ENOMEM);
82  ast->codecpar->channels = 1;
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  avpriv_set_pts_info(st, 16, 1, 12);
132 
133  c->cur_frame = 0;
134  c->has_video = 1;
135  c->has_audio = !!c->rate;
136  c->curstrm = -1;
137  if (c->has_audio)
138  return create_audio_stream(s, c);
139  return 0;
140 }
141 
143 {
144  if (avio_rl32(pb) != TAG_SHDR) {
145  av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
146  return AVERROR_INVALIDDATA;
147  }
148  if (avio_rb32(pb) != 8) {
149  av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
150  return AVERROR_INVALIDDATA;
151  }
152  avio_skip(pb, 4); // unknown value
153  c->rate = avio_rl16(pb);
154  c->bits = avio_rl16(pb);
155  c->block_align = c->rate * (c->bits >> 3);
156  return create_audio_stream(s, c);
157 }
158 
160 {
161  AVIOContext *pb = s->pb;
162  SIFFContext *c = s->priv_data;
163  uint32_t tag;
164  int ret;
165 
166  if (avio_rl32(pb) != TAG_SIFF)
167  return AVERROR_INVALIDDATA;
168  avio_skip(pb, 4); // ignore size
169  tag = avio_rl32(pb);
170 
171  if (tag != TAG_VBV1 && tag != TAG_SOUN) {
172  av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
173  return AVERROR_INVALIDDATA;
174  }
175 
176  if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
177  return ret;
178  if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
179  return ret;
180  if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
181  av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
182  return AVERROR_INVALIDDATA;
183  }
184  avio_skip(pb, 4); // ignore size
185 
186  return 0;
187 }
188 
190 {
191  SIFFContext *c = s->priv_data;
192 
193  if (c->has_video) {
194  unsigned int size;
195  if (c->cur_frame >= c->frames)
196  return AVERROR(EIO);
197  if (c->curstrm == -1) {
198  c->pktsize = avio_rl32(s->pb) - 4;
199  c->flags = avio_rl16(s->pb);
200  c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
201  if (c->gmcsize)
202  avio_read(s->pb, c->gmc, c->gmcsize);
203  c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
204  c->curstrm = !!(c->flags & VB_HAS_AUDIO);
205  }
206 
207  if (!c->curstrm) {
208  size = c->pktsize - c->sndsize;
209  if (av_new_packet(pkt, size) < 0)
210  return AVERROR(ENOMEM);
211  AV_WL16(pkt->data, c->flags);
212  if (c->gmcsize)
213  memcpy(pkt->data + 2, c->gmc, c->gmcsize);
214  avio_read(s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
215  pkt->stream_index = 0;
216  c->curstrm = -1;
217  } else {
218  int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
219  if (pktsize < 0)
220  return AVERROR(EIO);
221  pkt->stream_index = 1;
222  pkt->duration = pktsize;
223  c->curstrm = 0;
224  }
225  if (!c->cur_frame || c->curstrm)
226  pkt->flags |= AV_PKT_FLAG_KEY;
227  if (c->curstrm == -1)
228  c->cur_frame++;
229  } else {
230  int pktsize = av_get_packet(s->pb, pkt, c->block_align);
231  if (pktsize <= 0)
232  return AVERROR(EIO);
233  pkt->duration = pktsize;
234  }
235  return pkt->size;
236 }
237 
239  .name = "siff",
240  .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
241  .priv_data_size = sizeof(SIFFContext),
245  .extensions = "vb,son",
246 };
Bytestream IO Context.
Definition: avio.h:104
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int size
SIFFTags
Definition: siff.c:28
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:2986
unsigned int flags
Definition: siff.c:60
int frames
Definition: siff.c:46
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3483
int rate
Definition: siff.c:48
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
Definition: siff.c:30
static int siff_probe(AVProbeData *p)
Definition: siff.c:64
Format I/O context.
Definition: avformat.h:940
int curstrm
Definition: siff.c:55
uint8_t
int width
Video only.
Definition: avcodec.h:3525
static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
Definition: siff.c:74
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:70
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:696
AVInputFormat ff_siff_demuxer
Definition: siff.c:238
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1364
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2648
int has_audio
Definition: siff.c:53
uint8_t * data
Definition: avcodec.h:1346
uint32_t tag
Definition: movenc.c:854
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:117
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3556
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
#define AV_WL16(p, val)
Definition: intreadwrite.h:231
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1378
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:84
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:665
#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:148
Definition: siff.c:29
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3479
int has_video
Definition: siff.c:52
uint8_t gmc[4]
Definition: siff.c:61
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:400
static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
Definition: siff.c:142
int cur_frame
Definition: siff.c:47
audio channel layout utility functions
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:286
#define AV_RL32
Definition: intreadwrite.h:146
int sndsize
Definition: siff.c:58
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:546
Stream structure.
Definition: avformat.h:705
NULL
Definition: eval.c:55
static int width
Definition: utils.c:156
static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: siff.c:189
AVIOContext * pb
I/O context.
Definition: avformat.h:982
int block_align
Definition: siff.c:50
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
Definition: siff.c:34
VBFlags
Definition: vb.c:34
Definition: siff.c:32
This structure contains the data a format has to probe a file.
Definition: avformat.h:398
unsigned int pktsize
Definition: siff.c:56
Definition: siff.c:31
int height
Definition: gxfenc.c:72
static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
Definition: siff.c:91
int sample_rate
Audio only.
Definition: avcodec.h:3564
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:407
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:649
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:750
void * priv_data
Format private data.
Definition: avformat.h:968
int bits
Definition: siff.c:49
int gmcsize
Definition: siff.c:57
int bits_per_coded_sample
Definition: avcodec.h:3514
int channels
Audio only.
Definition: avcodec.h:3560
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:529
AVCodecParameters * codecpar
Definition: avformat.h:831
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3487
int stream_index
Definition: avcodec.h:1348
static int siff_read_header(AVFormatContext *s)
Definition: siff.c:159
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:256
This structure stores compressed data.
Definition: avcodec.h:1323
Definition: siff.c:33