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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 | ||
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 | ||
49 | typedef struct { | |
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; | |
55 | int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; | |
56 | ||
57 | uint32_t remain_packet_size; | |
58 | } BinkDemuxContext; | |
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 | ||
76 | static int read_header(AVFormatContext *s) | |
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 | ||
124 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
125 | vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO; | |
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"); | |
129 | vst->codec->codec_id = AV_CODEC_ID_NONE; | |
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 | ||
137 | if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { | |
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); | |
151 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
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 ? | |
157 | AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; | |
158 | if (flags & BINK_AUD_STEREO) { | |
159 | ast->codec->channels = 2; | |
160 | ast->codec->channel_layout = AV_CH_LAYOUT_STEREO; | |
161 | } else { | |
162 | ast->codec->channels = 1; | |
163 | ast->codec->channel_layout = AV_CH_LAYOUT_MONO; | |
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 | avio_seek(pb, vst->index_entries[0].pos, SEEK_SET); | |
198 | ||
199 | bink->current_track = -1; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int read_packet(AVFormatContext *s, AVPacket *pkt) | |
204 | { | |
205 | BinkDemuxContext *bink = s->priv_data; | |
206 | AVIOContext *pb = s->pb; | |
207 | int ret; | |
208 | ||
209 | if (bink->current_track < 0) { | |
210 | int index_entry; | |
211 | AVStream *st = s->streams[0]; // stream 0 is video stream with index | |
212 | ||
213 | if (bink->video_pts >= st->duration) | |
214 | return AVERROR_EOF; | |
215 | ||
216 | index_entry = av_index_search_timestamp(st, bink->video_pts, | |
217 | AVSEEK_FLAG_ANY); | |
218 | if (index_entry < 0) { | |
219 | av_log(s, AV_LOG_ERROR, | |
220 | "could not find index entry for frame %"PRId64"\n", | |
221 | bink->video_pts); | |
222 | return AVERROR(EIO); | |
223 | } | |
224 | ||
225 | bink->remain_packet_size = st->index_entries[index_entry].size; | |
226 | bink->current_track = 0; | |
227 | } | |
228 | ||
229 | while (bink->current_track < bink->num_audio_tracks) { | |
230 | uint32_t audio_size = avio_rl32(pb); | |
231 | if (audio_size > bink->remain_packet_size - 4) { | |
232 | av_log(s, AV_LOG_ERROR, | |
233 | "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n", | |
234 | bink->video_pts, audio_size, bink->remain_packet_size); | |
235 | return AVERROR(EIO); | |
236 | } | |
237 | bink->remain_packet_size -= 4 + audio_size; | |
238 | bink->current_track++; | |
239 | if (audio_size >= 4) { | |
240 | /* get one audio packet per track */ | |
241 | if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) | |
242 | return ret; | |
243 | pkt->stream_index = bink->current_track; | |
244 | pkt->pts = bink->audio_pts[bink->current_track - 1]; | |
245 | ||
246 | /* Each audio packet reports the number of decompressed samples | |
247 | (in bytes). We use this value to calcuate the audio PTS */ | |
248 | if (pkt->size >= 4) | |
249 | bink->audio_pts[bink->current_track -1] += | |
250 | AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels); | |
251 | return 0; | |
252 | } else { | |
253 | avio_skip(pb, audio_size); | |
254 | } | |
255 | } | |
256 | ||
257 | /* get video packet */ | |
258 | if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) | |
259 | return ret; | |
260 | pkt->stream_index = 0; | |
261 | pkt->pts = bink->video_pts++; | |
262 | pkt->flags |= AV_PKT_FLAG_KEY; | |
263 | ||
264 | /* -1 instructs the next call to read_packet() to read the next frame */ | |
265 | bink->current_track = -1; | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) | |
271 | { | |
272 | BinkDemuxContext *bink = s->priv_data; | |
273 | AVStream *vst = s->streams[0]; | |
274 | ||
275 | if (!s->pb->seekable) | |
276 | return -1; | |
277 | ||
278 | /* seek to the first frame */ | |
279 | if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0) | |
280 | return -1; | |
281 | ||
282 | bink->video_pts = 0; | |
283 | memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); | |
284 | bink->current_track = -1; | |
285 | return 0; | |
286 | } | |
287 | ||
288 | AVInputFormat ff_bink_demuxer = { | |
289 | .name = "bink", | |
290 | .long_name = NULL_IF_CONFIG_SMALL("Bink"), | |
291 | .priv_data_size = sizeof(BinkDemuxContext), | |
292 | .read_probe = probe, | |
293 | .read_header = read_header, | |
294 | .read_packet = read_packet, | |
295 | .read_seek = read_seek, | |
296 | .flags = AVFMT_SHOW_IDS, | |
297 | }; |