FFmpeg  2.6.9
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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 };