FFmpeg
bink.c
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1 /*
2  * Bink demuxer
3  * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org)
4  * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Bink demuxer
26  *
27  * Technical details here:
28  * http://wiki.multimedia.cx/index.php?title=Bink_Container
29  */
30 
31 #include <inttypes.h>
32 
34 #include "libavutil/intreadwrite.h"
35 #include "avformat.h"
36 #include "internal.h"
37 
39  BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
40  BINK_AUD_STEREO = 0x2000,
41  BINK_AUD_USEDCT = 0x1000,
42 };
43 
44 #define BINK_EXTRADATA_SIZE 1
45 #define BINK_MAX_AUDIO_TRACKS 256
46 #define BINK_MAX_WIDTH 7680
47 #define BINK_MAX_HEIGHT 4800
48 #define SMUSH_BLOCK_SIZE 512
49 
50 typedef struct BinkDemuxContext {
51  uint32_t file_size;
52 
53  uint32_t num_audio_tracks;
54  int current_track; ///< audio track to return in next packet
55  int64_t video_pts;
57 
59  int flags;
62 
63 static int probe(const AVProbeData *p)
64 {
65  const uint8_t *b = p->buf;
66  int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
67 
68  do {
69  if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */
70  (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' ||
71  b[3] == 'k')) ||
72  (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
73  (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' ||
74  b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) &&
75  AV_RL32(b+8) > 0 && // num_frames
76  AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
77  AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
78  AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
79  return AVPROBE_SCORE_MAX;
80  b += SMUSH_BLOCK_SIZE;
81  } while (smush && b < p->buf + p->buf_size - 32);
82  return 0;
83 }
84 
86 {
87  BinkDemuxContext *bink = s->priv_data;
88  AVIOContext *pb = s->pb;
89  uint32_t fps_num, fps_den;
90  AVStream *vst, *ast;
91  unsigned int i;
92  uint32_t pos, next_pos;
93  uint16_t flags;
94  int next_keyframe = 1;
95  int keyframe;
96  int ret;
97  uint32_t signature;
98  uint8_t revision;
99 
100  vst = avformat_new_stream(s, NULL);
101  if (!vst)
102  return AVERROR(ENOMEM);
103 
104  vst->codecpar->codec_tag = avio_rl32(pb);
105  if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
106  do {
107  bink->smush_size += SMUSH_BLOCK_SIZE;
108  avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
109  vst->codecpar->codec_tag = avio_rl32(pb);
110  } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
111  if (avio_feof(pb)) {
112  av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
113  return AVERROR_INVALIDDATA;
114  }
115  }
116 
117  bink->file_size = avio_rl32(pb) + 8;
118  vst->duration = avio_rl32(pb);
119 
120  if (vst->duration > 1000000) {
121  av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
122  return AVERROR(EIO);
123  }
124 
125  if (avio_rl32(pb) > bink->file_size) {
126  av_log(s, AV_LOG_ERROR,
127  "invalid header: largest frame size greater than file size\n");
128  return AVERROR(EIO);
129  }
130 
131  avio_skip(pb, 4);
132 
133  vst->codecpar->width = avio_rl32(pb);
134  vst->codecpar->height = avio_rl32(pb);
135 
136  fps_num = avio_rl32(pb);
137  fps_den = avio_rl32(pb);
138  if (fps_num == 0 || fps_den == 0) {
139  av_log(s, AV_LOG_ERROR,
140  "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
141  fps_num, fps_den);
142  return AVERROR(EIO);
143  }
144  avpriv_set_pts_info(vst, 64, fps_den, fps_num);
145  vst->avg_frame_rate = av_inv_q(vst->time_base);
146 
149 
150  if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
151  av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
153  }
154 
155  if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0)
156  return ret;
157 
158  bink->num_audio_tracks = avio_rl32(pb);
159 
161  av_log(s, AV_LOG_ERROR,
162  "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
163  bink->num_audio_tracks);
164  return AVERROR(EIO);
165  }
166 
167  signature = (vst->codecpar->codec_tag & 0xFFFFFF);
168  revision = ((vst->codecpar->codec_tag >> 24) % 0xFF);
169 
170  if ((signature == AV_RL32("BIK") && (revision == 'k')) ||
171  (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k')))
172  avio_skip(pb, 4); /* unknown new field */
173 
174  if (bink->num_audio_tracks) {
175  avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */
176 
177  for (i = 0; i < bink->num_audio_tracks; i++) {
178  ast = avformat_new_stream(s, NULL);
179  if (!ast)
180  return AVERROR(ENOMEM);
182  ast->codecpar->codec_tag = 0;
183  ast->codecpar->sample_rate = avio_rl16(pb);
184  avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
185  flags = avio_rl16(pb);
186  ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
188  if (flags & BINK_AUD_STEREO) {
189  ast->codecpar->channels = 2;
191  } else {
192  ast->codecpar->channels = 1;
194  }
195  if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0)
196  return ret;
198  }
199 
200  for (i = 0; i < bink->num_audio_tracks; i++)
201  s->streams[i + 1]->id = avio_rl32(pb);
202  }
203 
204  /* frame index table */
205  next_pos = avio_rl32(pb);
206  for (i = 0; i < vst->duration; i++) {
207  pos = next_pos;
208  keyframe = next_keyframe;
209  if (i == vst->duration - 1) {
210  next_pos = bink->file_size;
211  next_keyframe = 0;
212  } else {
213  next_pos = avio_rl32(pb);
214  next_keyframe = next_pos & 1;
215  }
216  pos &= ~1;
217  next_pos &= ~1;
218 
219  if (next_pos <= pos) {
220  av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
221  return AVERROR(EIO);
222  }
223  if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
224  keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
225  return ret;
226  }
227 
228  if (vst->index_entries)
229  avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
230  else
231  avio_skip(pb, 4);
232 
233  bink->current_track = -1;
234  return 0;
235 }
236 
238 {
239  BinkDemuxContext *bink = s->priv_data;
240  AVIOContext *pb = s->pb;
241  int ret;
242 
243  if (bink->current_track < 0) {
244  int index_entry;
245  AVStream *st = s->streams[0]; // stream 0 is video stream with index
246 
247  if (bink->video_pts >= st->duration)
248  return AVERROR_EOF;
249 
250  index_entry = av_index_search_timestamp(st, bink->video_pts,
252  if (index_entry < 0) {
253  av_log(s, AV_LOG_ERROR,
254  "could not find index entry for frame %"PRId64"\n",
255  bink->video_pts);
256  return AVERROR(EIO);
257  }
258 
259  bink->remain_packet_size = st->index_entries[index_entry].size;
260  bink->flags = st->index_entries[index_entry].flags;
261  bink->current_track = 0;
262  }
263 
264  while (bink->current_track < bink->num_audio_tracks) {
265  uint32_t audio_size = avio_rl32(pb);
266  if (audio_size > bink->remain_packet_size - 4) {
267  av_log(s, AV_LOG_ERROR,
268  "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
269  bink->video_pts, audio_size, bink->remain_packet_size);
270  return AVERROR(EIO);
271  }
272  bink->remain_packet_size -= 4 + audio_size;
273  bink->current_track++;
274  if (audio_size >= 4) {
275  /* get one audio packet per track */
276  if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
277  return ret;
278  pkt->stream_index = bink->current_track;
279  pkt->pts = bink->audio_pts[bink->current_track - 1];
280 
281  /* Each audio packet reports the number of decompressed samples
282  (in bytes). We use this value to calculate the audio PTS */
283  if (pkt->size >= 4)
284  bink->audio_pts[bink->current_track -1] +=
285  AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
286  return 0;
287  } else {
288  avio_skip(pb, audio_size);
289  }
290  }
291 
292  /* get video packet */
293  if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
294  return ret;
295  pkt->stream_index = 0;
296  pkt->pts = bink->video_pts++;
297  if (bink->flags & AVINDEX_KEYFRAME)
298  pkt->flags |= AV_PKT_FLAG_KEY;
299 
300  /* -1 instructs the next call to read_packet() to read the next frame */
301  bink->current_track = -1;
302 
303  return 0;
304 }
305 
306 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
307 {
308  BinkDemuxContext *bink = s->priv_data;
309  AVStream *vst = s->streams[0];
310  int64_t ret;
311 
312  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
313  return -1;
314 
315  /* seek to the first frame */
316  ret = avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
317  if (ret < 0)
318  return ret;
319 
320  bink->video_pts = 0;
321  memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
322  bink->current_track = -1;
323  return 0;
324 }
325 
327  .name = "bink",
328  .long_name = NULL_IF_CONFIG_SMALL("Bink"),
329  .priv_data_size = sizeof(BinkDemuxContext),
330  .read_probe = probe,
333  .read_seek = read_seek,
335 };
#define NULL
Definition: coverity.c:32
static int probe(const AVProbeData *p)
Definition: bink.c:63
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2045
int64_t video_pts
Definition: bink.c:55
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
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:4938
int64_t pos
Definition: avformat.h:805
#define BINK_MAX_AUDIO_TRACKS
Definition: bink.c:45
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2515
uint32_t file_size
Definition: bink.c:51
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:253
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
BinkAudFlags
Definition: bink.c:38
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:341
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:460
uint32_t num_audio_tracks
Definition: bink.c:53
Format I/O context.
Definition: avformat.h:1351
#define BINK_MAX_WIDTH
Definition: bink.c:46
static const char signature[]
Definition: ipmovie.c:615
uint8_t
int width
Video only.
Definition: codec_par.h:126
int current_track
audio track to return in next packet
Definition: bink.c:54
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
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:304
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
AVInputFormat ff_bink_demuxer
Definition: bink.c:326
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define BINK_MAX_HEIGHT
Definition: bink.c:47
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2162
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
unsigned int pos
Definition: spdifenc.c:410
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
#define SMUSH_BLOCK_SIZE
Definition: bink.c:48
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int smush_size
Definition: bink.c:60
#define b
Definition: input.c:41
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
audio channel layout utility functions
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:3321
static int read_header(AVFormatContext *s)
Definition: bink.c:85
#define s(width, name)
Definition: cbs_vp9.c:257
Stream structure.
Definition: avformat.h:876
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
#define AV_STRINGIFY(s)
Definition: macros.h:36
prefer 16-bit output
Definition: bink.c:39
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define AV_RN32(p)
Definition: intreadwrite.h:364
int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]
Definition: bink.c:56
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bink.c:237
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
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:743
Main libavformat public API header.
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3339
uint32_t remain_packet_size
Definition: bink.c:58
static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: bink.c:306
void * priv_data
Format private data.
Definition: avformat.h:1379
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
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:368
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
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
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
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:406
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
int i
Definition: input.c:406
#define AV_WL32(p, v)
Definition: intreadwrite.h:426