Libav
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 Libav.
7  *
8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
31 #include <inttypes.h>
32 
34 #include "libavutil/intreadwrite.h"
35 #include "avformat.h"
36 #include "internal.h"
37 
39  BINK_AUD_16BITS = 0x4000,
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 {
50  uint32_t file_size;
51 
52  uint32_t num_audio_tracks;
54  int64_t video_pts;
55  int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
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  AV_RL32(b+8) > 0 && // num_frames
67  AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
68  AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
69  AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
70  return AVPROBE_SCORE_MAX;
71  return 0;
72 }
73 
75 {
76  BinkDemuxContext *bink = s->priv_data;
77  AVIOContext *pb = s->pb;
78  uint32_t fps_num, fps_den;
79  AVStream *vst, *ast;
80  unsigned int i;
81  uint32_t pos, next_pos;
82  uint16_t flags;
83  int keyframe;
84 
85  vst = avformat_new_stream(s, NULL);
86  if (!vst)
87  return AVERROR(ENOMEM);
88 
89  vst->codec->codec_tag = avio_rl32(pb);
90 
91  bink->file_size = avio_rl32(pb) + 8;
92  vst->duration = avio_rl32(pb);
93 
94  if (vst->duration > 1000000) {
95  av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
96  return AVERROR(EIO);
97  }
98 
99  if (avio_rl32(pb) > bink->file_size) {
100  av_log(s, AV_LOG_ERROR,
101  "invalid header: largest frame size greater than file size\n");
102  return AVERROR(EIO);
103  }
104 
105  avio_skip(pb, 4);
106 
107  vst->codec->width = avio_rl32(pb);
108  vst->codec->height = avio_rl32(pb);
109 
110  fps_num = avio_rl32(pb);
111  fps_den = avio_rl32(pb);
112  if (fps_num == 0 || fps_den == 0) {
113  av_log(s, AV_LOG_ERROR,
114  "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
115  fps_num, fps_den);
116  return AVERROR(EIO);
117  }
118  avpriv_set_pts_info(vst, 64, fps_den, fps_num);
119  vst->avg_frame_rate = av_inv_q(vst->time_base);
120 
124  if (!vst->codec->extradata)
125  return AVERROR(ENOMEM);
126  vst->codec->extradata_size = 4;
127  avio_read(pb, vst->codec->extradata, 4);
128 
129  bink->num_audio_tracks = avio_rl32(pb);
130 
132  av_log(s, AV_LOG_ERROR,
133  "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
134  bink->num_audio_tracks);
135  return AVERROR(EIO);
136  }
137 
138  if (bink->num_audio_tracks) {
139  avio_skip(pb, 4 * bink->num_audio_tracks);
140 
141  for (i = 0; i < bink->num_audio_tracks; i++) {
142  ast = avformat_new_stream(s, NULL);
143  if (!ast)
144  return AVERROR(ENOMEM);
146  ast->codec->codec_tag = 0;
147  ast->codec->sample_rate = avio_rl16(pb);
148  avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
149  flags = avio_rl16(pb);
150  ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
152  if (flags & BINK_AUD_STEREO) {
153  ast->codec->channels = 2;
155  } else {
156  ast->codec->channels = 1;
158  }
160  if (!ast->codec->extradata)
161  return AVERROR(ENOMEM);
162  ast->codec->extradata_size = 4;
163  AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
164  }
165 
166  for (i = 0; i < bink->num_audio_tracks; i++)
167  s->streams[i + 1]->id = avio_rl32(pb);
168  }
169 
170  /* frame index table */
171  next_pos = avio_rl32(pb);
172  for (i = 0; i < vst->duration; i++) {
173  pos = next_pos;
174  if (i == vst->duration - 1) {
175  next_pos = bink->file_size;
176  keyframe = 0;
177  } else {
178  next_pos = avio_rl32(pb);
179  keyframe = pos & 1;
180  }
181  pos &= ~1;
182  next_pos &= ~1;
183 
184  if (next_pos <= pos) {
185  av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
186  return AVERROR(EIO);
187  }
188  av_add_index_entry(vst, pos, i, next_pos - pos, 0,
189  keyframe ? AVINDEX_KEYFRAME : 0);
190  }
191 
192  avio_skip(pb, 4);
193 
194  bink->current_track = -1;
195  return 0;
196 }
197 
199 {
200  BinkDemuxContext *bink = s->priv_data;
201  AVIOContext *pb = s->pb;
202  int ret;
203 
204  if (bink->current_track < 0) {
205  int index_entry;
206  AVStream *st = s->streams[0]; // stream 0 is video stream with index
207 
208  if (bink->video_pts >= st->duration)
209  return AVERROR(EIO);
210 
211  index_entry = av_index_search_timestamp(st, bink->video_pts,
213  if (index_entry < 0) {
214  av_log(s, AV_LOG_ERROR,
215  "could not find index entry for frame %"PRId64"\n",
216  bink->video_pts);
217  return AVERROR(EIO);
218  }
219 
220  bink->remain_packet_size = st->index_entries[index_entry].size;
221  bink->current_track = 0;
222  }
223 
224  while (bink->current_track < bink->num_audio_tracks) {
225  uint32_t audio_size = avio_rl32(pb);
226  if (audio_size > bink->remain_packet_size - 4) {
227  av_log(s, AV_LOG_ERROR,
228  "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
229  bink->video_pts, audio_size, bink->remain_packet_size);
230  return AVERROR(EIO);
231  }
232  bink->remain_packet_size -= 4 + audio_size;
233  bink->current_track++;
234  if (audio_size >= 4) {
235  /* get one audio packet per track */
236  if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
237  return ret;
238  pkt->stream_index = bink->current_track;
239  pkt->pts = bink->audio_pts[bink->current_track - 1];
240 
241  /* Each audio packet reports the number of decompressed samples
242  (in bytes). We use this value to calcuate the audio PTS */
243  if (pkt->size >= 4)
244  bink->audio_pts[bink->current_track -1] +=
245  AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
246  return 0;
247  } else {
248  avio_skip(pb, audio_size);
249  }
250  }
251 
252  /* get video packet */
253  if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
254  return ret;
255  pkt->stream_index = 0;
256  pkt->pts = bink->video_pts++;
257  pkt->flags |= AV_PKT_FLAG_KEY;
258 
259  /* -1 instructs the next call to read_packet() to read the next frame */
260  bink->current_track = -1;
261 
262  return 0;
263 }
264 
265 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
266 {
267  BinkDemuxContext *bink = s->priv_data;
268  AVStream *vst = s->streams[0];
269 
270  if (!s->pb->seekable)
271  return -1;
272 
273  /* seek to the first frame */
274  if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
275  return -1;
276 
277  bink->video_pts = 0;
278  memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
279  bink->current_track = -1;
280  return 0;
281 }
282 
284  .name = "bink",
285  .long_name = NULL_IF_CONFIG_SMALL("Bink"),
286  .priv_data_size = sizeof(BinkDemuxContext),
287  .read_probe = probe,
290  .read_seek = read_seek,
291 };
Bytestream IO Context.
Definition: avio.h:68
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:1181
int64_t video_pts
Definition: bink.c:54
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:2829
int64_t pos
Definition: avformat.h:660
#define BINK_MAX_AUDIO_TRACKS
Definition: bink.c:45
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:1611
uint32_t file_size
Definition: bink.c:50
int size
Definition: avcodec.h:974
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:878
BinkAudFlags
Definition: bink.c:38
#define AV_CH_LAYOUT_STEREO
uint32_t num_audio_tracks
Definition: bink.c:52
Format I/O context.
Definition: avformat.h:922
#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:706
#define b
Definition: input.c:52
#define AV_WL32(p, d)
Definition: intreadwrite.h:255
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
uint8_t * data
Definition: avcodec.h:973
static int flags
Definition: log.c:44
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
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
AVInputFormat ff_bink_demuxer
Definition: bink.c:283
#define AVINDEX_KEYFRAME
Definition: avformat.h:662
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
#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:1222
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:564
#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:150
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:780
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1852
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:117
audio channel layout utility functions
static int read_header(AVFormatContext *s)
Definition: bink.c:74
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int width
picture width / height.
Definition: avcodec.h:1224
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:210
#define AV_RL32
Definition: intreadwrite.h:146
Stream structure.
Definition: avformat.h:699
NULL
Definition: eval.c:55
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
int sample_rate
samples per second
Definition: avcodec.h:1791
AVIOContext * pb
I/O context.
Definition: avformat.h:964
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
int extradata_size
Definition: avcodec.h:1165
#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:395
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:122
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bink.c:198
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:756
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:548
Main libavformat public API header.
uint32_t remain_packet_size
Definition: bink.c:57
int channels
number of audio channels
Definition: avcodec.h:1792
static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: bink.c:265
void * priv_data
Format private data.
Definition: avformat.h:950
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
int stream_index
Definition: avcodec.h:975
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:741
#define AV_CH_LAYOUT_MONO
This structure stores compressed data.
Definition: avcodec.h:950
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:966