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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
38enum 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
50typedef 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 smush_size;
60} BinkDemuxContext;
61
62static int probe(AVProbeData *p)
63{
64 const uint8_t *b = p->buf;
65 int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
66
67 do {
68 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
69 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) ||
70 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
71 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) &&
72 AV_RL32(b+8) > 0 && // num_frames
73 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
74 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
75 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
76 return AVPROBE_SCORE_MAX;
77 b += SMUSH_BLOCK_SIZE;
78 } while (smush && b < p->buf + p->buf_size - 32);
79 return 0;
80}
81
82static int read_header(AVFormatContext *s)
83{
84 BinkDemuxContext *bink = s->priv_data;
85 AVIOContext *pb = s->pb;
86 uint32_t fps_num, fps_den;
87 AVStream *vst, *ast;
88 unsigned int i;
89 uint32_t pos, next_pos;
90 uint16_t flags;
91 int keyframe;
92 int ret;
93
94 vst = avformat_new_stream(s, NULL);
95 if (!vst)
96 return AVERROR(ENOMEM);
97
98 vst->codecpar->codec_tag = avio_rl32(pb);
99 if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
100 do {
101 bink->smush_size += SMUSH_BLOCK_SIZE;
102 avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
103 vst->codecpar->codec_tag = avio_rl32(pb);
104 } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
105 if (avio_feof(pb)) {
106 av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
107 return AVERROR_INVALIDDATA;
108 }
109 }
110
111 bink->file_size = avio_rl32(pb) + 8;
112 vst->duration = avio_rl32(pb);
113
114 if (vst->duration > 1000000) {
115 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
116 return AVERROR(EIO);
117 }
118
119 if (avio_rl32(pb) > bink->file_size) {
120 av_log(s, AV_LOG_ERROR,
121 "invalid header: largest frame size greater than file size\n");
122 return AVERROR(EIO);
123 }
124
125 avio_skip(pb, 4);
126
127 vst->codecpar->width = avio_rl32(pb);
128 vst->codecpar->height = avio_rl32(pb);
129
130 fps_num = avio_rl32(pb);
131 fps_den = avio_rl32(pb);
132 if (fps_num == 0 || fps_den == 0) {
133 av_log(s, AV_LOG_ERROR,
134 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
135 fps_num, fps_den);
136 return AVERROR(EIO);
137 }
138 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
139 vst->avg_frame_rate = av_inv_q(vst->time_base);
140
141 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
142 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
143
144 if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
145 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
146 vst->codecpar->codec_id = AV_CODEC_ID_NONE;
147 }
148
149 if (ff_get_extradata(s, vst->codecpar, pb, 4) < 0)
150 return AVERROR(ENOMEM);
151
152 bink->num_audio_tracks = avio_rl32(pb);
153
154 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
155 av_log(s, AV_LOG_ERROR,
156 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
157 bink->num_audio_tracks);
158 return AVERROR(EIO);
159 }
160
161 if (bink->num_audio_tracks) {
162 avio_skip(pb, 4 * bink->num_audio_tracks);
163
164 for (i = 0; i < bink->num_audio_tracks; i++) {
165 ast = avformat_new_stream(s, NULL);
166 if (!ast)
167 return AVERROR(ENOMEM);
168 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
169 ast->codecpar->codec_tag = 0;
170 ast->codecpar->sample_rate = avio_rl16(pb);
171 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
172 flags = avio_rl16(pb);
173 ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
174 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
175 if (flags & BINK_AUD_STEREO) {
176 ast->codecpar->channels = 2;
177 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
178 } else {
179 ast->codecpar->channels = 1;
180 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
181 }
182 if (ff_alloc_extradata(ast->codecpar, 4))
183 return AVERROR(ENOMEM);
184 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
185 }
186
187 for (i = 0; i < bink->num_audio_tracks; i++)
188 s->streams[i + 1]->id = avio_rl32(pb);
189 }
190
191 /* frame index table */
192 next_pos = avio_rl32(pb);
193 for (i = 0; i < vst->duration; i++) {
194 pos = next_pos;
195 if (i == vst->duration - 1) {
196 next_pos = bink->file_size;
197 keyframe = 0;
198 } else {
199 next_pos = avio_rl32(pb);
200 keyframe = pos & 1;
201 }
202 pos &= ~1;
203 next_pos &= ~1;
204
205 if (next_pos <= pos) {
206 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
207 return AVERROR(EIO);
208 }
209 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
210 keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
211 return ret;
212 }
213
214 if (vst->index_entries)
215 avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
216 else
217 avio_skip(pb, 4);
218
219 bink->current_track = -1;
220 return 0;
221}
222
223static int read_packet(AVFormatContext *s, AVPacket *pkt)
224{
225 BinkDemuxContext *bink = s->priv_data;
226 AVIOContext *pb = s->pb;
227 int ret;
228
229 if (bink->current_track < 0) {
230 int index_entry;
231 AVStream *st = s->streams[0]; // stream 0 is video stream with index
232
233 if (bink->video_pts >= st->duration)
234 return AVERROR_EOF;
235
236 index_entry = av_index_search_timestamp(st, bink->video_pts,
237 AVSEEK_FLAG_ANY);
238 if (index_entry < 0) {
239 av_log(s, AV_LOG_ERROR,
240 "could not find index entry for frame %"PRId64"\n",
241 bink->video_pts);
242 return AVERROR(EIO);
243 }
244
245 bink->remain_packet_size = st->index_entries[index_entry].size;
246 bink->current_track = 0;
247 }
248
249 while (bink->current_track < bink->num_audio_tracks) {
250 uint32_t audio_size = avio_rl32(pb);
251 if (audio_size > bink->remain_packet_size - 4) {
252 av_log(s, AV_LOG_ERROR,
253 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
254 bink->video_pts, audio_size, bink->remain_packet_size);
255 return AVERROR(EIO);
256 }
257 bink->remain_packet_size -= 4 + audio_size;
258 bink->current_track++;
259 if (audio_size >= 4) {
260 /* get one audio packet per track */
261 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
262 return ret;
263 pkt->stream_index = bink->current_track;
264 pkt->pts = bink->audio_pts[bink->current_track - 1];
265
266 /* Each audio packet reports the number of decompressed samples
267 (in bytes). We use this value to calculate the audio PTS */
268 if (pkt->size >= 4)
269 bink->audio_pts[bink->current_track -1] +=
270 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
271 return 0;
272 } else {
273 avio_skip(pb, audio_size);
274 }
275 }
276
277 /* get video packet */
278 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
279 return ret;
280 pkt->stream_index = 0;
281 pkt->pts = bink->video_pts++;
282 pkt->flags |= AV_PKT_FLAG_KEY;
283
284 /* -1 instructs the next call to read_packet() to read the next frame */
285 bink->current_track = -1;
286
287 return 0;
288}
289
290static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
291{
292 BinkDemuxContext *bink = s->priv_data;
293 AVStream *vst = s->streams[0];
294
295 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
296 return -1;
297
298 /* seek to the first frame */
299 if (avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET) < 0)
300 return -1;
301
302 bink->video_pts = 0;
303 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
304 bink->current_track = -1;
305 return 0;
306}
307
308AVInputFormat ff_bink_demuxer = {
309 .name = "bink",
310 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
311 .priv_data_size = sizeof(BinkDemuxContext),
312 .read_probe = probe,
313 .read_header = read_header,
314 .read_packet = read_packet,
315 .read_seek = read_seek,
316 .flags = AVFMT_SHOW_IDS,
317};
318
generated by cgit at 2024-05-17 05:05:30 (GMT)