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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 
49 typedef struct BinkDemuxContext {
50  uint32_t file_size;
51 
52  uint32_t num_audio_tracks;
53  int current_track; ///< audio track to return in next packet
54  int64_t video_pts;
56 
59 
60 static int probe(AVProbeData *p)
61 {
62  const uint8_t *b = p->buf;
63 
64  if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
65  (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) ||
66  (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
67  (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) &&
68  AV_RL32(b+8) > 0 && // num_frames
69  AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
70  AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
71  AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
72  return AVPROBE_SCORE_MAX;
73  return 0;
74 }
75 
77 {
78  BinkDemuxContext *bink = s->priv_data;
79  AVIOContext *pb = s->pb;
80  uint32_t fps_num, fps_den;
81  AVStream *vst, *ast;
82  unsigned int i;
83  uint32_t pos, next_pos;
84  uint16_t flags;
85  int keyframe;
86  int ret;
87 
88  vst = avformat_new_stream(s, NULL);
89  if (!vst)
90  return AVERROR(ENOMEM);
91 
92  vst->codec->codec_tag = avio_rl32(pb);
93 
94  bink->file_size = avio_rl32(pb) + 8;
95  vst->duration = avio_rl32(pb);
96 
97  if (vst->duration > 1000000) {
98  av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
99  return AVERROR(EIO);
100  }
101 
102  if (avio_rl32(pb) > bink->file_size) {
103  av_log(s, AV_LOG_ERROR,
104  "invalid header: largest frame size greater than file size\n");
105  return AVERROR(EIO);
106  }
107 
108  avio_skip(pb, 4);
109 
110  vst->codec->width = avio_rl32(pb);
111  vst->codec->height = avio_rl32(pb);
112 
113  fps_num = avio_rl32(pb);
114  fps_den = avio_rl32(pb);
115  if (fps_num == 0 || fps_den == 0) {
116  av_log(s, AV_LOG_ERROR,
117  "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
118  fps_num, fps_den);
119  return AVERROR(EIO);
120  }
121  avpriv_set_pts_info(vst, 64, fps_den, fps_num);
122  vst->avg_frame_rate = av_inv_q(vst->time_base);
123 
126 
127  if ((vst->codec->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
128  av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
130  }
131 
132  if (ff_get_extradata(vst->codec, pb, 4) < 0)
133  return AVERROR(ENOMEM);
134 
135  bink->num_audio_tracks = avio_rl32(pb);
136 
138  av_log(s, AV_LOG_ERROR,
139  "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
140  bink->num_audio_tracks);
141  return AVERROR(EIO);
142  }
143 
144  if (bink->num_audio_tracks) {
145  avio_skip(pb, 4 * bink->num_audio_tracks);
146 
147  for (i = 0; i < bink->num_audio_tracks; i++) {
148  ast = avformat_new_stream(s, NULL);
149  if (!ast)
150  return AVERROR(ENOMEM);
152  ast->codec->codec_tag = 0;
153  ast->codec->sample_rate = avio_rl16(pb);
154  avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
155  flags = avio_rl16(pb);
156  ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
158  if (flags & BINK_AUD_STEREO) {
159  ast->codec->channels = 2;
161  } else {
162  ast->codec->channels = 1;
164  }
165  if (ff_alloc_extradata(ast->codec, 4))
166  return AVERROR(ENOMEM);
167  AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
168  }
169 
170  for (i = 0; i < bink->num_audio_tracks; i++)
171  s->streams[i + 1]->id = avio_rl32(pb);
172  }
173 
174  /* frame index table */
175  next_pos = avio_rl32(pb);
176  for (i = 0; i < vst->duration; i++) {
177  pos = next_pos;
178  if (i == vst->duration - 1) {
179  next_pos = bink->file_size;
180  keyframe = 0;
181  } else {
182  next_pos = avio_rl32(pb);
183  keyframe = pos & 1;
184  }
185  pos &= ~1;
186  next_pos &= ~1;
187 
188  if (next_pos <= pos) {
189  av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
190  return AVERROR(EIO);
191  }
192  if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
193  keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
194  return ret;
195  }
196 
197  if (vst->index_entries)
198  avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
199  else
200  avio_skip(pb, 4);
201 
202  bink->current_track = -1;
203  return 0;
204 }
205 
207 {
208  BinkDemuxContext *bink = s->priv_data;
209  AVIOContext *pb = s->pb;
210  int ret;
211 
212  if (bink->current_track < 0) {
213  int index_entry;
214  AVStream *st = s->streams[0]; // stream 0 is video stream with index
215 
216  if (bink->video_pts >= st->duration)
217  return AVERROR_EOF;
218 
219  index_entry = av_index_search_timestamp(st, bink->video_pts,
221  if (index_entry < 0) {
222  av_log(s, AV_LOG_ERROR,
223  "could not find index entry for frame %"PRId64"\n",
224  bink->video_pts);
225  return AVERROR(EIO);
226  }
227 
228  bink->remain_packet_size = st->index_entries[index_entry].size;
229  bink->current_track = 0;
230  }
231 
232  while (bink->current_track < bink->num_audio_tracks) {
233  uint32_t audio_size = avio_rl32(pb);
234  if (audio_size > bink->remain_packet_size - 4) {
235  av_log(s, AV_LOG_ERROR,
236  "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
237  bink->video_pts, audio_size, bink->remain_packet_size);
238  return AVERROR(EIO);
239  }
240  bink->remain_packet_size -= 4 + audio_size;
241  bink->current_track++;
242  if (audio_size >= 4) {
243  /* get one audio packet per track */
244  if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
245  return ret;
246  pkt->stream_index = bink->current_track;
247  pkt->pts = bink->audio_pts[bink->current_track - 1];
248 
249  /* Each audio packet reports the number of decompressed samples
250  (in bytes). We use this value to calcuate the audio PTS */
251  if (pkt->size >= 4)
252  bink->audio_pts[bink->current_track -1] +=
253  AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
254  return 0;
255  } else {
256  avio_skip(pb, audio_size);
257  }
258  }
259 
260  /* get video packet */
261  if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
262  return ret;
263  pkt->stream_index = 0;
264  pkt->pts = bink->video_pts++;
265  pkt->flags |= AV_PKT_FLAG_KEY;
266 
267  /* -1 instructs the next call to read_packet() to read the next frame */
268  bink->current_track = -1;
269 
270  return 0;
271 }
272 
273 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
274 {
275  BinkDemuxContext *bink = s->priv_data;
276  AVStream *vst = s->streams[0];
277 
278  if (!s->pb->seekable)
279  return -1;
280 
281  /* seek to the first frame */
282  if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
283  return -1;
284 
285  bink->video_pts = 0;
286  memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
287  bink->current_track = -1;
288  return 0;
289 }
290 
292  .name = "bink",
293  .long_name = NULL_IF_CONFIG_SMALL("Bink"),
294  .priv_data_size = sizeof(BinkDemuxContext),
295  .read_probe = probe,
298  .read_seek = read_seek,
300 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
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:1742
int64_t video_pts
Definition: bink.c:54
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int probe(AVProbeData *p)
Definition: bink.c:60
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:4071
int64_t pos
Definition: avformat.h:784
#define BINK_MAX_AUDIO_TRACKS
Definition: bink.c:45
int ff_get_extradata(AVCodecContext *avctx, 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:2942
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2268
uint32_t file_size
Definition: bink.c:50
int size
Definition: avcodec.h:1423
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:204
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1046
BinkAudFlags
Definition: bink.c:38
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:277
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:467
uint32_t num_audio_tracks
Definition: bink.c:52
Format I/O context.
Definition: avformat.h:1272
#define BINK_MAX_WIDTH
Definition: bink.c:46
uint8_t
int current_track
audio track to return in next packet
Definition: bink.c:53
int id
Format-specific stream ID.
Definition: avformat.h:849
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1616
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3737
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1340
uint8_t * data
Definition: avcodec.h:1422
#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:241
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1468
AVInputFormat ff_bink_demuxer
Definition: bink.c:291
#define AVINDEX_KEYFRAME
Definition: avformat.h:791
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#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:1841
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:659
#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:175
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:925
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1428
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2322
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
audio channel layout utility functions
static int read_header(AVFormatContext *s)
Definition: bink.c:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1680
Stream structure.
Definition: avformat.h:842
enum AVMediaType codec_type
Definition: avcodec.h:1509
enum AVCodecID codec_id
Definition: avcodec.h:1518
int sample_rate
samples per second
Definition: avcodec.h:2261
AVIOContext * pb
I/O context.
Definition: avformat.h:1314
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1533
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2921
#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:448
int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]
Definition: bink.c:55
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
static int flags
Definition: cpu.c:47
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bink.c:206
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:901
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:643
Main libavformat public API header.
uint32_t remain_packet_size
Definition: bink.c:57
int channels
number of audio channels
Definition: avcodec.h:2262
static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: bink.c:273
void * priv_data
Format private data.
Definition: avformat.h:1300
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
int stream_index
Definition: avcodec.h:1424
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:315
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1399
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1415
#define AV_WL32(p, v)
Definition: intreadwrite.h:426