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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;
63 } SIFFContext;
64 
65 static int siff_probe(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);
83  ast->codec->channels = 1;
85  ast->codec->bits_per_coded_sample = 8;
86  ast->codec->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->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
129  st->codec->width = width;
130  st->codec->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 
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  c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
204  if (c->gmcsize)
205  avio_read(s->pb, c->gmc, c->gmcsize);
206  c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
207  c->curstrm = !!(c->flags & VB_HAS_AUDIO);
208  }
209 
210  if (!c->curstrm) {
211  if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
212  return AVERROR_INVALIDDATA;
213 
214  size = c->pktsize - c->sndsize - c->gmcsize - 2;
215  size = ffio_limit(s->pb, size);
216  if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
217  return AVERROR(ENOMEM);
218  AV_WL16(pkt->data, c->flags);
219  if (c->gmcsize)
220  memcpy(pkt->data + 2, c->gmc, c->gmcsize);
221  if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
222  av_free_packet(pkt);
223  return AVERROR_INVALIDDATA;
224  }
225  pkt->stream_index = 0;
226  c->curstrm = -1;
227  } else {
228  int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
229  if (pktsize < 0)
230  return AVERROR(EIO);
231  pkt->stream_index = 1;
232  pkt->duration = pktsize;
233  c->curstrm = 0;
234  }
235  if (!c->cur_frame || c->curstrm)
236  pkt->flags |= AV_PKT_FLAG_KEY;
237  if (c->curstrm == -1)
238  c->cur_frame++;
239  } else {
240  int pktsize = av_get_packet(s->pb, pkt, c->block_align);
241  if (!pktsize)
242  return AVERROR_EOF;
243  if (pktsize <= 0)
244  return AVERROR(EIO);
245  pkt->duration = pktsize;
246  }
247  return pkt->size;
248 }
249 
251  .name = "siff",
252  .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
253  .priv_data_size = sizeof(SIFFContext),
257  .extensions = "vb,son",
258 };