FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/bink.c
Date: 2025-10-19 14:07:46
Exec Total Coverage
Lines: 116 163 71.2%
Functions: 3 4 75.0%
Branches: 70 142 49.3%
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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 "demux.h"
37 #include "internal.h"
38
39 enum BinkAudFlags {
40 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
41 BINK_AUD_STEREO = 0x2000,
42 BINK_AUD_USEDCT = 0x1000,
43 };
44
45 #define BINK_EXTRADATA_SIZE 1
46 #define BINK_MAX_AUDIO_TRACKS 256
47 #define BINK_MAX_WIDTH 7680
48 #define BINK_MAX_HEIGHT 4800
49 #define SMUSH_BLOCK_SIZE 512
50
51 typedef struct BinkDemuxContext {
52 uint32_t file_size;
53
54 uint32_t num_audio_tracks;
55 int current_track; ///< audio track to return in next packet
56 int64_t video_pts;
57 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
58
59 uint32_t remain_packet_size;
60 int flags;
61 int smush_size;
62 } BinkDemuxContext;
63
64 7279 static int probe(const AVProbeData *p)
65 {
66 7279 const uint8_t *b = p->buf;
67 7279 int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
68
69 do {
70
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 7279 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */
71
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 6 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' ||
72 ✗ b[3] == 'k')) ||
73
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 7273 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
74 ✗ (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' ||
75 ✗ b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) &&
76
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 6 AV_RL32(b+8) > 0 && // num_frames
77
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 6 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
78
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 6 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
79
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 6 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
80 6 return AVPROBE_SCORE_MAX;
81 7273 b += SMUSH_BLOCK_SIZE;
82
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 7273 } while (smush && b < p->buf + p->buf_size - 32);
83 7273 return 0;
84 }
85
86 6 static int read_header(AVFormatContext *s)
87 {
88 6 BinkDemuxContext *bink = s->priv_data;
89 6 AVIOContext *pb = s->pb;
90 uint32_t fps_num, fps_den;
91 6 AVStream *const vst = avformat_new_stream(s, NULL);
92 6 FFStream *const vsti = ffstream(vst);
93 unsigned int i;
94 uint32_t pos, next_pos;
95 uint16_t flags;
96 6 int next_keyframe = 1;
97 int keyframe;
98 int ret;
99 uint32_t signature;
100 uint8_t revision;
101
102
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 6 if (!vst)
103 ✗ return AVERROR(ENOMEM);
104
105 6 vst->codecpar->codec_tag = avio_rl32(pb);
106
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 6 if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
107 do {
108 ✗ bink->smush_size += SMUSH_BLOCK_SIZE;
109 ✗ avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
110 ✗ vst->codecpar->codec_tag = avio_rl32(pb);
111 ✗ } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
112 ✗ if (avio_feof(pb)) {
113 ✗ av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
114 ✗ return AVERROR_INVALIDDATA;
115 }
116 }
117
118 6 bink->file_size = avio_rl32(pb) + 8;
119 6 vst->duration = avio_rl32(pb);
120
121
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 6 if (vst->duration > 1000000) {
122 ✗ av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
123 ✗ return AVERROR(EIO);
124 }
125
126
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 6 if (avio_rl32(pb) > bink->file_size) {
127 ✗ av_log(s, AV_LOG_ERROR,
128 "invalid header: largest frame size greater than file size\n");
129 ✗ return AVERROR(EIO);
130 }
131
132 6 avio_skip(pb, 4);
133
134 6 vst->codecpar->width = avio_rl32(pb);
135 6 vst->codecpar->height = avio_rl32(pb);
136
137 6 fps_num = avio_rl32(pb);
138 6 fps_den = avio_rl32(pb);
139
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 6 if (fps_num == 0 || fps_den == 0) {
140 ✗ av_log(s, AV_LOG_ERROR,
141 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
142 fps_num, fps_den);
143 ✗ return AVERROR(EIO);
144 }
145 6 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
146 6 vst->avg_frame_rate = av_inv_q(vst->time_base);
147
148 6 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
149 6 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
150
151
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 6 if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
152 ✗ av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
153 ✗ vst->codecpar->codec_id = AV_CODEC_ID_NONE;
154 }
155
156
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 6 if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0)
157 ✗ return ret;
158
159 6 bink->num_audio_tracks = avio_rl32(pb);
160
161
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 6 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
162 ✗ av_log(s, AV_LOG_ERROR,
163 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
164 bink->num_audio_tracks);
165 ✗ return AVERROR(EIO);
166 }
167
168 6 signature = (vst->codecpar->codec_tag & 0xFFFFFF);
169 6 revision = ((vst->codecpar->codec_tag >> 24) % 0xFF);
170
171
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 6 if ((signature == AV_RL32("BIK") && (revision == 'k')) ||
172
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 6 (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k')))
173 ✗ avio_skip(pb, 4); /* unknown new field */
174
175
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 6 if (bink->num_audio_tracks) {
176 4 avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */
177
178
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 8 for (i = 0; i < bink->num_audio_tracks; i++) {
179 4 AVStream *const ast = avformat_new_stream(s, NULL);
180
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 4 if (!ast)
181 ✗ return AVERROR(ENOMEM);
182 4 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
183 4 ast->codecpar->codec_tag = 0;
184 4 ast->codecpar->sample_rate = avio_rl16(pb);
185 4 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
186 4 flags = avio_rl16(pb);
187 8 ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
188
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 4 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
189
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 4 if (flags & BINK_AUD_STEREO) {
190 3 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
191 } else {
192 1 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
193 }
194
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 4 if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0)
195 ✗ return ret;
196 4 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
197 }
198
199
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 8 for (i = 0; i < bink->num_audio_tracks; i++)
200 4 s->streams[i + 1]->id = avio_rl32(pb);
201 }
202
203 /* frame index table */
204 6 next_pos = avio_rl32(pb);
205
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 759 for (i = 0; i < vst->duration; i++) {
206 753 pos = next_pos;
207 753 keyframe = next_keyframe;
208
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 753 if (i == vst->duration - 1) {
209 6 next_pos = bink->file_size;
210 6 next_keyframe = 0;
211 } else {
212 747 next_pos = avio_rl32(pb);
213 747 next_keyframe = next_pos & 1;
214 }
215 753 pos &= ~1;
216 753 next_pos &= ~1;
217
218
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 753 if (next_pos <= pos) {
219 ✗ av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
220 ✗ return AVERROR(EIO);
221 }
222
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 753 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
223 keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
224 ✗ return ret;
225 }
226
227
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 6 if (vsti->index_entries)
228 6 avio_seek(pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET);
229 else
230 ✗ avio_skip(pb, 4);
231
232 6 bink->current_track = -1;
233 6 return 0;
234 }
235
236 299 static int read_packet(AVFormatContext *s, AVPacket *pkt)
237 {
238 299 BinkDemuxContext *bink = s->priv_data;
239 299 AVIOContext *pb = s->pb;
240 int ret;
241
242
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 299 if (bink->current_track < 0) {
243 int index_entry;
244 199 AVStream *st = s->streams[0]; // stream 0 is video stream with index
245 199 FFStream *const sti = ffstream(st);
246
247
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 199 if (bink->video_pts >= st->duration)
248 3 return AVERROR_EOF;
249
250 196 index_entry = av_index_search_timestamp(st, bink->video_pts,
251 AVSEEK_FLAG_ANY);
252
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 196 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
259 196 bink->remain_packet_size = sti->index_entries[index_entry].size;
260 196 bink->flags = sti->index_entries[index_entry].flags;
261 196 bink->current_track = 0;
262 }
263
264
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 330 while (bink->current_track < bink->num_audio_tracks) {
265 134 uint32_t audio_size = avio_rl32(pb);
266
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 134 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 }
272 134 bink->remain_packet_size -= 4 + audio_size;
273 134 bink->current_track++;
274
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 134 if (audio_size >= 4) {
275 /* get one audio packet per track */
276
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 100 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
277 ✗ return ret;
278 100 pkt->stream_index = bink->current_track;
279 100 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
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 100 if (pkt->size >= 4)
284 100 bink->audio_pts[bink->current_track -1] +=
285 100 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->ch_layout.nb_channels);
286 100 return 0;
287 } else {
288 34 avio_skip(pb, audio_size);
289 }
290 }
291
292 /* get video packet */
293
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 196 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
294 2 return ret;
295 194 pkt->stream_index = 0;
296 194 pkt->pts = bink->video_pts++;
297
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 194 if (bink->flags & AVINDEX_KEYFRAME)
298 6 pkt->flags |= AV_PKT_FLAG_KEY;
299
300 /* -1 instructs the next call to read_packet() to read the next frame */
301 194 bink->current_track = -1;
302
303 194 return 0;
304 }
305
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 ✗ FFStream *const vsti = ffstream(vst);
311 int64_t ret;
312
313 ✗ if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
314 ✗ return -1;
315
316 /* seek to the first frame */
317 ✗ ret = avio_seek(s->pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET);
318 ✗ if (ret < 0)
319 ✗ return ret;
320
321 ✗ bink->video_pts = 0;
322 ✗ memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
323 ✗ bink->current_track = -1;
324 ✗ return 0;
325 }
326
327 const FFInputFormat ff_bink_demuxer = {
328 .p.name = "bink",
329 .p.long_name = NULL_IF_CONFIG_SMALL("Bink"),
330 .p.flags = AVFMT_SHOW_IDS,
331 .priv_data_size = sizeof(BinkDemuxContext),
332 .read_probe = probe,
333 .read_header = read_header,
334 .read_packet = read_packet,
335 .read_seek = read_seek,
336 };
337