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
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/intreadwrite.h"
35 #include "avformat.h"
36 #include "internal.h"
37
38 enum BinkAudFlags {
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;
56 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
57
58 uint32_t remain_packet_size;
59 int flags;
60 int smush_size;
61 } BinkDemuxContext;
62
probe(const AVProbeData * p)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
read_header(AVFormatContext * s)85 static int read_header(AVFormatContext *s)
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
147 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
148 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
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");
152 vst->codecpar->codec_id = AV_CODEC_ID_NONE;
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
160 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
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);
181 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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 ?
187 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
188 if (flags & BINK_AUD_STEREO) {
189 ast->codecpar->channels = 2;
190 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
191 } else {
192 ast->codecpar->channels = 1;
193 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
194 }
195 if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0)
196 return ret;
197 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
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
read_packet(AVFormatContext * s,AVPacket * pkt)237 static int read_packet(AVFormatContext *s, AVPacket *pkt)
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,
251 AVSEEK_FLAG_ANY);
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
read_seek(AVFormatContext * s,int stream_index,int64_t timestamp,int flags)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
326 AVInputFormat ff_bink_demuxer = {
327 .name = "bink",
328 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
329 .priv_data_size = sizeof(BinkDemuxContext),
330 .read_probe = probe,
331 .read_header = read_header,
332 .read_packet = read_packet,
333 .read_seek = read_seek,
334 .flags = AVFMT_SHOW_IDS,
335 };
336