Commit | Line | Data |
---|---|---|
619d8e2e MN |
1 | /* |
2 | * "NUT" Container Format demuxer | |
3 | * Copyright (c) 2004-2006 Michael Niedermayer | |
4 | * Copyright (c) 2003 Alex Beregszaszi | |
5 | * | |
2912e87a | 6 | * This file is part of Libav. |
619d8e2e | 7 | * |
2912e87a | 8 | * Libav is free software; you can redistribute it and/or |
619d8e2e MN |
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 | * | |
2912e87a | 13 | * Libav is distributed in the hope that it will be useful, |
619d8e2e MN |
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 | |
2912e87a | 19 | * License along with Libav; if not, write to the Free Software |
619d8e2e | 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
619d8e2e MN |
21 | */ |
22 | ||
245976da | 23 | #include "libavutil/avstring.h" |
6a5d31ac | 24 | #include "libavutil/bswap.h" |
d2d67e42 | 25 | #include "libavutil/dict.h" |
0ebcdf5c | 26 | #include "libavutil/mathematics.h" |
245976da | 27 | #include "libavutil/tree.h" |
4839c192 | 28 | #include "avio_internal.h" |
619d8e2e | 29 | #include "nut.h" |
bfe5454c | 30 | #include "riff.h" |
619d8e2e MN |
31 | |
32 | #undef NDEBUG | |
33 | #include <assert.h> | |
34 | ||
3c0eec06 | 35 | #define NUT_MAX_STREAMS 256 /* arbitrary sanity check value */ |
3c0eec06 | 36 | |
a559d65c AL |
37 | static int get_str(AVIOContext *bc, char *string, unsigned int maxlen) |
38 | { | |
39 | unsigned int len = ffio_read_varlen(bc); | |
619d8e2e | 40 | |
a559d65c | 41 | if (len && maxlen) |
b7effd4e | 42 | avio_read(bc, string, FFMIN(len, maxlen)); |
a559d65c | 43 | while (len > maxlen) { |
b7effd4e | 44 | avio_r8(bc); |
619d8e2e MN |
45 | len--; |
46 | } | |
47 | ||
a559d65c AL |
48 | if (maxlen) |
49 | string[FFMIN(len, maxlen - 1)] = 0; | |
619d8e2e | 50 | |
a559d65c | 51 | if (maxlen == len) |
619d8e2e MN |
52 | return -1; |
53 | else | |
54 | return 0; | |
55 | } | |
56 | ||
a559d65c AL |
57 | static int64_t get_s(AVIOContext *bc) |
58 | { | |
4839c192 | 59 | int64_t v = ffio_read_varlen(bc) + 1; |
619d8e2e | 60 | |
a559d65c AL |
61 | if (v & 1) |
62 | return -(v >> 1); | |
63 | else | |
64 | return (v >> 1); | |
619d8e2e MN |
65 | } |
66 | ||
a559d65c AL |
67 | static uint64_t get_fourcc(AVIOContext *bc) |
68 | { | |
69 | unsigned int len = ffio_read_varlen(bc); | |
619d8e2e | 70 | |
a559d65c AL |
71 | if (len == 2) |
72 | return avio_rl16(bc); | |
73 | else if (len == 4) | |
74 | return avio_rl32(bc); | |
75 | else | |
76 | return -1; | |
619d8e2e MN |
77 | } |
78 | ||
79 | #ifdef TRACE | |
93e81ee8 DB |
80 | static inline uint64_t get_v_trace(AVIOContext *bc, const char *file, |
81 | const char *func, int line) | |
a559d65c AL |
82 | { |
83 | uint64_t v = ffio_read_varlen(bc); | |
619d8e2e | 84 | |
a559d65c AL |
85 | av_log(NULL, AV_LOG_DEBUG, "get_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", |
86 | v, v, file, func, line); | |
619d8e2e MN |
87 | return v; |
88 | } | |
89 | ||
93e81ee8 DB |
90 | static inline int64_t get_s_trace(AVIOContext *bc, const char *file, |
91 | const char *func, int line) | |
a559d65c AL |
92 | { |
93 | int64_t v = get_s(bc); | |
619d8e2e | 94 | |
a559d65c AL |
95 | av_log(NULL, AV_LOG_DEBUG, "get_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", |
96 | v, v, file, func, line); | |
619d8e2e MN |
97 | return v; |
98 | } | |
99 | ||
a559d65c AL |
100 | #define ffio_read_varlen(bc) get_v_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__) |
101 | #define get_s(bc) get_s_trace(bc, __FILE__, __PRETTY_FUNCTION__, __LINE__) | |
619d8e2e MN |
102 | #endif |
103 | ||
a559d65c AL |
104 | static int get_packetheader(NUTContext *nut, AVIOContext *bc, |
105 | int calculate_checksum, uint64_t startcode) | |
619d8e2e | 106 | { |
a47ec310 | 107 | int64_t size; |
a559d65c | 108 | // start = avio_tell(bc) - 8; |
619d8e2e | 109 | |
a559d65c AL |
110 | startcode = av_be2ne64(startcode); |
111 | startcode = ff_crc04C11DB7_update(0, (uint8_t*) &startcode, 8); | |
073811cd | 112 | |
4c4427a7 | 113 | ffio_init_checksum(bc, ff_crc04C11DB7_update, startcode); |
a559d65c AL |
114 | size = ffio_read_varlen(bc); |
115 | if (size > 4096) | |
b7effd4e | 116 | avio_rb32(bc); |
a559d65c | 117 | if (ffio_get_checksum(bc) && size > 4096) |
47772399 | 118 | return -1; |
619d8e2e | 119 | |
4c4427a7 | 120 | ffio_init_checksum(bc, calculate_checksum ? ff_crc04C11DB7_update : NULL, 0); |
619d8e2e | 121 | |
619d8e2e MN |
122 | return size; |
123 | } | |
124 | ||
a559d65c AL |
125 | static uint64_t find_any_startcode(AVIOContext *bc, int64_t pos) |
126 | { | |
127 | uint64_t state = 0; | |
128 | ||
129 | if (pos >= 0) | |
130 | /* Note, this may fail if the stream is not seekable, but that should | |
131 | * not matter, as in this case we simply start where we currently are */ | |
132 | avio_seek(bc, pos, SEEK_SET); | |
133 | while (!bc->eof_reached) { | |
134 | state = (state << 8) | avio_r8(bc); | |
135 | if ((state >> 56) != 'N') | |
619d8e2e | 136 | continue; |
a559d65c | 137 | switch (state) { |
619d8e2e MN |
138 | case MAIN_STARTCODE: |
139 | case STREAM_STARTCODE: | |
140 | case SYNCPOINT_STARTCODE: | |
141 | case INFO_STARTCODE: | |
142 | case INDEX_STARTCODE: | |
143 | return state; | |
144 | } | |
145 | } | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | /** | |
93951943 | 151 | * Find the given startcode. |
619d8e2e MN |
152 | * @param code the startcode |
153 | * @param pos the start position of the search, or -1 if the current position | |
32e543f8 | 154 | * @return the position of the startcode or -1 if not found |
619d8e2e | 155 | */ |
a559d65c AL |
156 | static int64_t find_startcode(AVIOContext *bc, uint64_t code, int64_t pos) |
157 | { | |
158 | for (;;) { | |
159 | uint64_t startcode = find_any_startcode(bc, pos); | |
160 | if (startcode == code) | |
a2704c97 | 161 | return avio_tell(bc) - 8; |
a559d65c | 162 | else if (startcode == 0) |
619d8e2e | 163 | return -1; |
a559d65c | 164 | pos = -1; |
619d8e2e MN |
165 | } |
166 | } | |
167 | ||
a559d65c AL |
168 | static int nut_probe(AVProbeData *p) |
169 | { | |
619d8e2e | 170 | int i; |
a559d65c | 171 | uint64_t code = 0; |
619d8e2e MN |
172 | |
173 | for (i = 0; i < p->buf_size; i++) { | |
174 | code = (code << 8) | p->buf[i]; | |
175 | if (code == MAIN_STARTCODE) | |
176 | return AVPROBE_SCORE_MAX; | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
72d30b27 LB |
181 | #define GET_V(dst, check) \ |
182 | do { \ | |
183 | tmp = ffio_read_varlen(bc); \ | |
184 | if (!(check)) { \ | |
185 | av_log(s, AV_LOG_ERROR, "Error " #dst " is (%"PRId64")\n", tmp); \ | |
e0c53c34 | 186 | return AVERROR_INVALIDDATA; \ |
72d30b27 LB |
187 | } \ |
188 | dst = tmp; \ | |
189 | } while (0) | |
619d8e2e | 190 | |
a559d65c AL |
191 | static int skip_reserved(AVIOContext *bc, int64_t pos) |
192 | { | |
a2704c97 | 193 | pos -= avio_tell(bc); |
a559d65c | 194 | if (pos < 0) { |
6b4aa5da | 195 | avio_seek(bc, pos, SEEK_CUR); |
e0c53c34 | 196 | return AVERROR_INVALIDDATA; |
a559d65c AL |
197 | } else { |
198 | while (pos--) | |
b7effd4e | 199 | avio_r8(bc); |
619d8e2e MN |
200 | return 0; |
201 | } | |
202 | } | |
203 | ||
a559d65c AL |
204 | static int decode_main_header(NUTContext *nut) |
205 | { | |
206 | AVFormatContext *s = nut->avf; | |
207 | AVIOContext *bc = s->pb; | |
619d8e2e MN |
208 | uint64_t tmp, end; |
209 | unsigned int stream_count; | |
a559d65c AL |
210 | int i, j, count; |
211 | int tmp_stream, tmp_mul, tmp_pts, tmp_size, tmp_res, tmp_head_idx; | |
619d8e2e | 212 | |
a559d65c | 213 | end = get_packetheader(nut, bc, 1, MAIN_STARTCODE); |
a2704c97 | 214 | end += avio_tell(bc); |
619d8e2e | 215 | |
c94e2e85 | 216 | nut->version = ffio_read_varlen(bc); |
52a1c32c LB |
217 | if (nut->version < NUT_MIN_VERSION && |
218 | nut->version > NUT_MAX_VERSION) { | |
219 | av_log(s, AV_LOG_ERROR, "Version %d not supported.\n", | |
220 | nut->version); | |
e0c53c34 LB |
221 | return AVERROR(ENOSYS); |
222 | } | |
223 | ||
72d30b27 | 224 | GET_V(stream_count, tmp > 0 && tmp <= NUT_MAX_STREAMS); |
619d8e2e | 225 | |
4839c192 | 226 | nut->max_distance = ffio_read_varlen(bc); |
a559d65c | 227 | if (nut->max_distance > 65536) { |
619d8e2e | 228 | av_log(s, AV_LOG_DEBUG, "max_distance %d\n", nut->max_distance); |
a559d65c | 229 | nut->max_distance = 65536; |
619d8e2e MN |
230 | } |
231 | ||
72d30b27 | 232 | GET_V(nut->time_base_count, tmp > 0 && tmp < INT_MAX / sizeof(AVRational)); |
a559d65c | 233 | nut->time_base = av_malloc(nut->time_base_count * sizeof(AVRational)); |
3035d21b HBL |
234 | if (!nut->time_base) |
235 | return AVERROR(ENOMEM); | |
619d8e2e | 236 | |
a559d65c | 237 | for (i = 0; i < nut->time_base_count; i++) { |
72d30b27 LB |
238 | GET_V(nut->time_base[i].num, tmp > 0 && tmp < (1ULL << 31)); |
239 | GET_V(nut->time_base[i].den, tmp > 0 && tmp < (1ULL << 31)); | |
a559d65c | 240 | if (av_gcd(nut->time_base[i].num, nut->time_base[i].den) != 1) { |
62f72b40 LB |
241 | av_log(s, AV_LOG_ERROR, "invalid time base %d/%d\n", |
242 | nut->time_base[i].num, | |
243 | nut->time_base[i].den); | |
0d3ee135 | 244 | return AVERROR_INVALIDDATA; |
619d8e2e MN |
245 | } |
246 | } | |
a559d65c AL |
247 | tmp_pts = 0; |
248 | tmp_mul = 1; | |
249 | tmp_stream = 0; | |
250 | tmp_head_idx = 0; | |
251 | for (i = 0; i < 256;) { | |
252 | int tmp_flags = ffio_read_varlen(bc); | |
253 | int tmp_fields = ffio_read_varlen(bc); | |
254 | ||
255 | if (tmp_fields > 0) | |
256 | tmp_pts = get_s(bc); | |
257 | if (tmp_fields > 1) | |
258 | tmp_mul = ffio_read_varlen(bc); | |
259 | if (tmp_fields > 2) | |
260 | tmp_stream = ffio_read_varlen(bc); | |
261 | if (tmp_fields > 3) | |
262 | tmp_size = ffio_read_varlen(bc); | |
263 | else | |
264 | tmp_size = 0; | |
265 | if (tmp_fields > 4) | |
266 | tmp_res = ffio_read_varlen(bc); | |
267 | else | |
268 | tmp_res = 0; | |
269 | if (tmp_fields > 5) | |
270 | count = ffio_read_varlen(bc); | |
271 | else | |
272 | count = tmp_mul - tmp_size; | |
273 | if (tmp_fields > 6) | |
274 | get_s(bc); | |
275 | if (tmp_fields > 7) | |
276 | tmp_head_idx = ffio_read_varlen(bc); | |
277 | ||
278 | while (tmp_fields-- > 8) | |
279 | ffio_read_varlen(bc); | |
280 | ||
281 | if (count == 0 || i + count > 256) { | |
619d8e2e | 282 | av_log(s, AV_LOG_ERROR, "illegal count %d at %d\n", count, i); |
0d3ee135 | 283 | return AVERROR_INVALIDDATA; |
619d8e2e | 284 | } |
a559d65c | 285 | if (tmp_stream >= stream_count) { |
62f72b40 LB |
286 | av_log(s, AV_LOG_ERROR, "illegal stream number %d >= %d\n", |
287 | tmp_stream, stream_count); | |
0d3ee135 | 288 | return AVERROR_INVALIDDATA; |
619d8e2e MN |
289 | } |
290 | ||
a559d65c | 291 | for (j = 0; j < count; j++, i++) { |
619d8e2e | 292 | if (i == 'N') { |
a559d65c | 293 | nut->frame_code[i].flags = FLAG_INVALID; |
619d8e2e MN |
294 | j--; |
295 | continue; | |
296 | } | |
a559d65c AL |
297 | nut->frame_code[i].flags = tmp_flags; |
298 | nut->frame_code[i].pts_delta = tmp_pts; | |
299 | nut->frame_code[i].stream_id = tmp_stream; | |
300 | nut->frame_code[i].size_mul = tmp_mul; | |
301 | nut->frame_code[i].size_lsb = tmp_size + j; | |
302 | nut->frame_code[i].reserved_count = tmp_res; | |
303 | nut->frame_code[i].header_idx = tmp_head_idx; | |
619d8e2e MN |
304 | } |
305 | } | |
306 | assert(nut->frame_code['N'].flags == FLAG_INVALID); | |
307 | ||
a559d65c AL |
308 | if (end > avio_tell(bc) + 4) { |
309 | int rem = 1024; | |
72d30b27 | 310 | GET_V(nut->header_count, tmp < 128U); |
3b4f69ae | 311 | nut->header_count++; |
a559d65c | 312 | for (i = 1; i < nut->header_count; i++) { |
9d72c052 | 313 | uint8_t *hdr; |
a559d65c | 314 | GET_V(nut->header_len[i], tmp > 0 && tmp < 256); |
62f72b40 LB |
315 | if (rem < nut->header_len[i]) { |
316 | av_log(s, AV_LOG_ERROR, | |
317 | "invalid elision header %d : %d > %d\n", | |
318 | i, nut->header_len[i], rem); | |
0d3ee135 | 319 | return AVERROR_INVALIDDATA; |
3b4f69ae | 320 | } |
62f72b40 | 321 | rem -= nut->header_len[i]; |
9d72c052 MR |
322 | hdr = av_malloc(nut->header_len[i]); |
323 | if (!hdr) | |
324 | return AVERROR(ENOMEM); | |
325 | avio_read(bc, hdr, nut->header_len[i]); | |
326 | nut->header[i] = hdr; | |
3b4f69ae | 327 | } |
a559d65c | 328 | assert(nut->header_len[0] == 0); |
3b4f69ae MN |
329 | } |
330 | ||
c94e2e85 LB |
331 | // flags had been effectively introduced in version 4 |
332 | if (nut->version > NUT_STABLE_VERSION) { | |
333 | nut->flags = ffio_read_varlen(bc); | |
334 | } | |
335 | ||
a559d65c | 336 | if (skip_reserved(bc, end) || ffio_get_checksum(bc)) { |
93951943 | 337 | av_log(s, AV_LOG_ERROR, "main header checksum mismatch\n"); |
0d3ee135 | 338 | return AVERROR_INVALIDDATA; |
619d8e2e MN |
339 | } |
340 | ||
a559d65c | 341 | nut->stream = av_mallocz(sizeof(StreamContext) * stream_count); |
3035d21b HBL |
342 | if (!nut->stream) |
343 | return AVERROR(ENOMEM); | |
a559d65c | 344 | for (i = 0; i < stream_count; i++) |
84ad31ff | 345 | avformat_new_stream(s, NULL); |
619d8e2e MN |
346 | |
347 | return 0; | |
348 | } | |
349 | ||
a559d65c AL |
350 | static int decode_stream_header(NUTContext *nut) |
351 | { | |
352 | AVFormatContext *s = nut->avf; | |
353 | AVIOContext *bc = s->pb; | |
619d8e2e | 354 | StreamContext *stc; |
c873bc17 | 355 | int class, stream_id; |
619d8e2e MN |
356 | uint64_t tmp, end; |
357 | AVStream *st; | |
358 | ||
a559d65c | 359 | end = get_packetheader(nut, bc, 1, STREAM_STARTCODE); |
a2704c97 | 360 | end += avio_tell(bc); |
619d8e2e | 361 | |
efd8f22a | 362 | GET_V(stream_id, tmp < s->nb_streams && !nut->stream[tmp].time_base); |
a559d65c AL |
363 | stc = &nut->stream[stream_id]; |
364 | st = s->streams[stream_id]; | |
619d8e2e | 365 | if (!st) |
769e10f0 | 366 | return AVERROR(ENOMEM); |
619d8e2e | 367 | |
a559d65c AL |
368 | class = ffio_read_varlen(bc); |
369 | tmp = get_fourcc(bc); | |
370 | st->codec->codec_tag = tmp; | |
371 | switch (class) { | |
372 | case 0: | |
373 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
374 | st->codec->codec_id = av_codec_get_id((const AVCodecTag * const []) { | |
a559d65c | 375 | ff_nut_video_tags, |
1bd442c2 | 376 | ff_codec_bmp_tags, |
a559d65c AL |
377 | 0 |
378 | }, | |
379 | tmp); | |
380 | break; | |
381 | case 1: | |
382 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
92281850 LB |
383 | st->codec->codec_id = av_codec_get_id((const AVCodecTag * const []) { |
384 | ff_nut_audio_tags, | |
385 | ff_codec_wav_tags, | |
386 | 0 | |
387 | }, | |
388 | tmp); | |
a559d65c AL |
389 | break; |
390 | case 2: | |
391 | st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; | |
392 | st->codec->codec_id = ff_codec_get_id(ff_nut_subtitle_tags, tmp); | |
393 | break; | |
394 | case 3: | |
395 | st->codec->codec_type = AVMEDIA_TYPE_DATA; | |
d4bff9f1 | 396 | st->codec->codec_id = ff_codec_get_id(ff_nut_data_tags, tmp); |
a559d65c AL |
397 | break; |
398 | default: | |
399 | av_log(s, AV_LOG_ERROR, "unknown stream class (%d)\n", class); | |
e0c53c34 | 400 | return AVERROR(ENOSYS); |
619d8e2e | 401 | } |
36ef5369 | 402 | if (class < 3 && st->codec->codec_id == AV_CODEC_ID_NONE) |
a559d65c AL |
403 | av_log(s, AV_LOG_ERROR, |
404 | "Unknown codec tag '0x%04x' for stream number %d\n", | |
405 | (unsigned int) tmp, stream_id); | |
406 | ||
407 | GET_V(stc->time_base_id, tmp < nut->time_base_count); | |
408 | GET_V(stc->msb_pts_shift, tmp < 16); | |
409 | stc->max_pts_distance = ffio_read_varlen(bc); | |
410 | GET_V(stc->decode_delay, tmp < 1000); // sanity limit, raise this if Moore's law is true | |
a559d65c AL |
411 | ffio_read_varlen(bc); // stream flags |
412 | ||
413 | GET_V(st->codec->extradata_size, tmp < (1 << 30)); | |
414 | if (st->codec->extradata_size) { | |
415 | st->codec->extradata = av_mallocz(st->codec->extradata_size + | |
059a9348 | 416 | AV_INPUT_BUFFER_PADDING_SIZE); |
3035d21b HBL |
417 | if (!st->codec->extradata) |
418 | return AVERROR(ENOMEM); | |
b7effd4e | 419 | avio_read(bc, st->codec->extradata, st->codec->extradata_size); |
619d8e2e MN |
420 | } |
421 | ||
a559d65c | 422 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
72d30b27 LB |
423 | GET_V(st->codec->width, tmp > 0); |
424 | GET_V(st->codec->height, tmp > 0); | |
a559d65c AL |
425 | st->sample_aspect_ratio.num = ffio_read_varlen(bc); |
426 | st->sample_aspect_ratio.den = ffio_read_varlen(bc); | |
427 | if ((!st->sample_aspect_ratio.num) != (!st->sample_aspect_ratio.den)) { | |
428 | av_log(s, AV_LOG_ERROR, "invalid aspect ratio %d/%d\n", | |
429 | st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); | |
e0c53c34 | 430 | return AVERROR_INVALIDDATA; |
619d8e2e | 431 | } |
4839c192 | 432 | ffio_read_varlen(bc); /* csp type */ |
a559d65c | 433 | } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
72d30b27 | 434 | GET_V(st->codec->sample_rate, tmp > 0); |
4839c192 | 435 | ffio_read_varlen(bc); // samplerate_den |
72d30b27 | 436 | GET_V(st->codec->channels, tmp > 0); |
619d8e2e | 437 | } |
a559d65c AL |
438 | if (skip_reserved(bc, end) || ffio_get_checksum(bc)) { |
439 | av_log(s, AV_LOG_ERROR, | |
440 | "stream header %d checksum mismatch\n", stream_id); | |
e0c53c34 | 441 | return AVERROR_INVALIDDATA; |
619d8e2e | 442 | } |
a559d65c AL |
443 | stc->time_base = &nut->time_base[stc->time_base_id]; |
444 | avpriv_set_pts_info(s->streams[stream_id], 63, stc->time_base->num, | |
445 | stc->time_base->den); | |
619d8e2e MN |
446 | return 0; |
447 | } | |
448 | ||
a559d65c AL |
449 | static void set_disposition_bits(AVFormatContext *avf, char *value, |
450 | int stream_id) | |
451 | { | |
90c2295b | 452 | int flag = 0, i; |
a559d65c AL |
453 | |
454 | for (i = 0; ff_nut_dispositions[i].flag; ++i) | |
90c2295b ES |
455 | if (!strcmp(ff_nut_dispositions[i].str, value)) |
456 | flag = ff_nut_dispositions[i].flag; | |
90c2295b ES |
457 | if (!flag) |
458 | av_log(avf, AV_LOG_INFO, "unknown disposition type '%s'\n", value); | |
459 | for (i = 0; i < avf->nb_streams; ++i) | |
460 | if (stream_id == i || stream_id == -1) | |
461 | avf->streams[i]->disposition |= flag; | |
462 | } | |
463 | ||
a559d65c AL |
464 | static int decode_info_header(NUTContext *nut) |
465 | { | |
466 | AVFormatContext *s = nut->avf; | |
467 | AVIOContext *bc = s->pb; | |
e1c0b00b AK |
468 | uint64_t tmp, chapter_start, chapter_len; |
469 | unsigned int stream_id_plus1, count; | |
619d8e2e MN |
470 | int chapter_id, i; |
471 | int64_t value, end; | |
7ebab679 | 472 | char name[256], str_value[1024], type_str[256]; |
0fca8bc8 | 473 | const char *type; |
96bfb677 | 474 | int *event_flags = NULL; |
a559d65c AL |
475 | AVChapter *chapter = NULL; |
476 | AVStream *st = NULL; | |
d2d67e42 | 477 | AVDictionary **metadata = NULL; |
fa3a5dd4 | 478 | int metadata_flag = 0; |
619d8e2e | 479 | |
a559d65c | 480 | end = get_packetheader(nut, bc, 1, INFO_STARTCODE); |
a2704c97 | 481 | end += avio_tell(bc); |
619d8e2e | 482 | |
72d30b27 | 483 | GET_V(stream_id_plus1, tmp <= s->nb_streams); |
a559d65c AL |
484 | chapter_id = get_s(bc); |
485 | chapter_start = ffio_read_varlen(bc); | |
486 | chapter_len = ffio_read_varlen(bc); | |
487 | count = ffio_read_varlen(bc); | |
488 | ||
489 | if (chapter_id && !stream_id_plus1) { | |
490 | int64_t start = chapter_start / nut->time_base_count; | |
491 | chapter = avpriv_new_chapter(s, chapter_id, | |
492 | nut->time_base[chapter_start % | |
493 | nut->time_base_count], | |
494 | start, start + chapter_len, NULL); | |
b34257ee AC |
495 | if (!chapter) { |
496 | av_log(s, AV_LOG_ERROR, "Could not create chapter.\n"); | |
497 | return AVERROR(ENOMEM); | |
498 | } | |
c55f891c | 499 | metadata = &chapter->metadata; |
a559d65c AL |
500 | } else if (stream_id_plus1) { |
501 | st = s->streams[stream_id_plus1 - 1]; | |
c55f891c | 502 | metadata = &st->metadata; |
fa3a5dd4 AS |
503 | event_flags = &st->event_flags; |
504 | metadata_flag = AVSTREAM_EVENT_FLAG_METADATA_UPDATED; | |
505 | } else { | |
c55f891c | 506 | metadata = &s->metadata; |
fa3a5dd4 AS |
507 | event_flags = &s->event_flags; |
508 | metadata_flag = AVFMT_EVENT_FLAG_METADATA_UPDATED; | |
509 | } | |
883fe4d5 | 510 | |
a559d65c | 511 | for (i = 0; i < count; i++) { |
619d8e2e | 512 | get_str(bc, name, sizeof(name)); |
a559d65c AL |
513 | value = get_s(bc); |
514 | if (value == -1) { | |
515 | type = "UTF-8"; | |
619d8e2e | 516 | get_str(bc, str_value, sizeof(str_value)); |
a559d65c | 517 | } else if (value == -2) { |
0fca8bc8 | 518 | get_str(bc, type_str, sizeof(type_str)); |
a559d65c | 519 | type = type_str; |
619d8e2e | 520 | get_str(bc, str_value, sizeof(str_value)); |
a559d65c AL |
521 | } else if (value == -3) { |
522 | type = "s"; | |
523 | value = get_s(bc); | |
524 | } else if (value == -4) { | |
525 | type = "t"; | |
526 | value = ffio_read_varlen(bc); | |
527 | } else if (value < -4) { | |
528 | type = "r"; | |
619d8e2e | 529 | get_s(bc); |
a559d65c AL |
530 | } else { |
531 | type = "v"; | |
619d8e2e MN |
532 | } |
533 | ||
d6f142a1 | 534 | if (stream_id_plus1 > s->nb_streams) { |
0e239529 LB |
535 | av_log(s, AV_LOG_WARNING, |
536 | "invalid stream id %d for info packet\n", | |
537 | stream_id_plus1); | |
90c2295b ES |
538 | continue; |
539 | } | |
540 | ||
a559d65c AL |
541 | if (!strcmp(type, "UTF-8")) { |
542 | if (chapter_id == 0 && !strcmp(name, "Disposition")) { | |
90c2295b | 543 | set_disposition_bits(s, str_value, stream_id_plus1 - 1); |
c55f891c AK |
544 | continue; |
545 | } | |
a559d65c | 546 | if (metadata && av_strcasecmp(name, "Uses") && |
fa3a5dd4 | 547 | av_strcasecmp(name, "Depends") && av_strcasecmp(name, "Replaces")) { |
96bfb677 LB |
548 | if (event_flags) |
549 | *event_flags |= metadata_flag; | |
d2d67e42 | 550 | av_dict_set(metadata, name, str_value, 0); |
fa3a5dd4 | 551 | } |
883fe4d5 | 552 | } |
619d8e2e MN |
553 | } |
554 | ||
a559d65c | 555 | if (skip_reserved(bc, end) || ffio_get_checksum(bc)) { |
93951943 | 556 | av_log(s, AV_LOG_ERROR, "info header checksum mismatch\n"); |
e0c53c34 | 557 | return AVERROR_INVALIDDATA; |
619d8e2e MN |
558 | } |
559 | return 0; | |
560 | } | |
561 | ||
a559d65c AL |
562 | static int decode_syncpoint(NUTContext *nut, int64_t *ts, int64_t *back_ptr) |
563 | { | |
564 | AVFormatContext *s = nut->avf; | |
565 | AVIOContext *bc = s->pb; | |
4d5be986 | 566 | int64_t end, tmp; |
b1fcdc08 | 567 | int ret; |
619d8e2e | 568 | |
a559d65c | 569 | nut->last_syncpoint_pos = avio_tell(bc) - 8; |
619d8e2e | 570 | |
a559d65c | 571 | end = get_packetheader(nut, bc, 1, SYNCPOINT_STARTCODE); |
a2704c97 | 572 | end += avio_tell(bc); |
619d8e2e | 573 | |
a559d65c AL |
574 | tmp = ffio_read_varlen(bc); |
575 | *back_ptr = nut->last_syncpoint_pos - 16 * ffio_read_varlen(bc); | |
576 | if (*back_ptr < 0) | |
4d5be986 | 577 | return -1; |
619d8e2e | 578 | |
a559d65c AL |
579 | ff_nut_reset_ts(nut, nut->time_base[tmp % nut->time_base_count], |
580 | tmp / nut->time_base_count); | |
619d8e2e | 581 | |
c94e2e85 LB |
582 | if (nut->flags & NUT_BROADCAST) { |
583 | tmp = ffio_read_varlen(bc); | |
584 | av_log(s, AV_LOG_VERBOSE, "Syncpoint wallclock %"PRId64"\n", | |
585 | av_rescale_q(tmp / nut->time_base_count, | |
586 | nut->time_base[tmp % nut->time_base_count], | |
587 | AV_TIME_BASE_Q)); | |
588 | } | |
589 | ||
a559d65c | 590 | if (skip_reserved(bc, end) || ffio_get_checksum(bc)) { |
faf7cbf1 | 591 | av_log(s, AV_LOG_ERROR, "sync point checksum mismatch\n"); |
e0c53c34 | 592 | return AVERROR_INVALIDDATA; |
619d8e2e | 593 | } |
4d5be986 | 594 | |
a559d65c AL |
595 | *ts = tmp / s->nb_streams * |
596 | av_q2d(nut->time_base[tmp % s->nb_streams]) * AV_TIME_BASE; | |
b1fcdc08 DB |
597 | |
598 | if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, *back_ptr, *ts)) < 0) | |
599 | return ret; | |
4d5be986 | 600 | |
619d8e2e MN |
601 | return 0; |
602 | } | |
603 | ||
a559d65c AL |
604 | static int find_and_decode_index(NUTContext *nut) |
605 | { | |
606 | AVFormatContext *s = nut->avf; | |
607 | AVIOContext *bc = s->pb; | |
e8272029 MN |
608 | uint64_t tmp, end; |
609 | int i, j, syncpoint_count; | |
a559d65c | 610 | int64_t filesize = avio_size(bc); |
e8272029 MN |
611 | int64_t *syncpoints; |
612 | int8_t *has_keyframe; | |
e0c53c34 | 613 | int ret = AVERROR_INVALIDDATA; |
e8272029 | 614 | |
a559d65c AL |
615 | avio_seek(bc, filesize - 12, SEEK_SET); |
616 | avio_seek(bc, filesize - avio_rb64(bc), SEEK_SET); | |
617 | if (avio_rb64(bc) != INDEX_STARTCODE) { | |
0e239529 | 618 | av_log(s, AV_LOG_WARNING, "no index at the end\n"); |
e0c53c34 | 619 | return ret; |
e8272029 MN |
620 | } |
621 | ||
a559d65c | 622 | end = get_packetheader(nut, bc, 1, INDEX_STARTCODE); |
a2704c97 | 623 | end += avio_tell(bc); |
e8272029 | 624 | |
a559d65c | 625 | ffio_read_varlen(bc); // max_pts |
72d30b27 | 626 | GET_V(syncpoint_count, tmp < INT_MAX / 8 && tmp > 0); |
a559d65c AL |
627 | syncpoints = av_malloc(sizeof(int64_t) * syncpoint_count); |
628 | has_keyframe = av_malloc(sizeof(int8_t) * (syncpoint_count + 1)); | |
5a2645ca VG |
629 | if (!syncpoints || !has_keyframe) { |
630 | ret = AVERROR(ENOMEM); | |
631 | goto fail; | |
632 | } | |
a559d65c | 633 | for (i = 0; i < syncpoint_count; i++) { |
4839c192 | 634 | syncpoints[i] = ffio_read_varlen(bc); |
a559d65c | 635 | if (syncpoints[i] <= 0) |
c2a3dcaf | 636 | goto fail; |
a559d65c AL |
637 | if (i) |
638 | syncpoints[i] += syncpoints[i - 1]; | |
639 | } | |
640 | ||
641 | for (i = 0; i < s->nb_streams; i++) { | |
642 | int64_t last_pts = -1; | |
643 | for (j = 0; j < syncpoint_count;) { | |
644 | uint64_t x = ffio_read_varlen(bc); | |
645 | int type = x & 1; | |
646 | int n = j; | |
647 | x >>= 1; | |
648 | if (type) { | |
649 | int flag = x & 1; | |
650 | x >>= 1; | |
651 | if (n + x >= syncpoint_count + 1) { | |
e8272029 | 652 | av_log(s, AV_LOG_ERROR, "index overflow A\n"); |
c2a3dcaf | 653 | goto fail; |
e8272029 | 654 | } |
a559d65c AL |
655 | while (x--) |
656 | has_keyframe[n++] = flag; | |
657 | has_keyframe[n++] = !flag; | |
658 | } else { | |
659 | while (x != 1) { | |
660 | if (n >= syncpoint_count + 1) { | |
e8272029 | 661 | av_log(s, AV_LOG_ERROR, "index overflow B\n"); |
c2a3dcaf | 662 | goto fail; |
e8272029 | 663 | } |
a559d65c AL |
664 | has_keyframe[n++] = x & 1; |
665 | x >>= 1; | |
e8272029 MN |
666 | } |
667 | } | |
a559d65c | 668 | if (has_keyframe[0]) { |
e8272029 | 669 | av_log(s, AV_LOG_ERROR, "keyframe before first syncpoint in index\n"); |
c2a3dcaf | 670 | goto fail; |
e8272029 | 671 | } |
a559d65c AL |
672 | assert(n <= syncpoint_count + 1); |
673 | for (; j < n && j < syncpoint_count; j++) { | |
674 | if (has_keyframe[j]) { | |
675 | uint64_t B, A = ffio_read_varlen(bc); | |
676 | if (!A) { | |
677 | A = ffio_read_varlen(bc); | |
678 | B = ffio_read_varlen(bc); | |
679 | // eor_pts[j][i] = last_pts + A + B | |
680 | } else | |
681 | B = 0; | |
682 | av_add_index_entry(s->streams[i], 16 * syncpoints[j - 1], | |
683 | last_pts + A, 0, 0, AVINDEX_KEYFRAME); | |
e8272029 MN |
684 | last_pts += A + B; |
685 | } | |
686 | } | |
687 | } | |
688 | } | |
689 | ||
a559d65c | 690 | if (skip_reserved(bc, end) || ffio_get_checksum(bc)) { |
93951943 | 691 | av_log(s, AV_LOG_ERROR, "index checksum mismatch\n"); |
c2a3dcaf | 692 | goto fail; |
e8272029 | 693 | } |
a559d65c AL |
694 | ret = 0; |
695 | ||
c2a3dcaf MN |
696 | fail: |
697 | av_free(syncpoints); | |
698 | av_free(has_keyframe); | |
699 | return ret; | |
e8272029 MN |
700 | } |
701 | ||
254f3dab LB |
702 | static int nut_read_close(AVFormatContext *s) |
703 | { | |
704 | NUTContext *nut = s->priv_data; | |
705 | int i; | |
706 | ||
707 | av_freep(&nut->time_base); | |
708 | av_freep(&nut->stream); | |
709 | ff_nut_free_sp(nut); | |
710 | for (i = 1; i < nut->header_count; i++) | |
711 | av_freep(&nut->header[i]); | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
6e9651d1 | 716 | static int nut_read_header(AVFormatContext *s) |
619d8e2e MN |
717 | { |
718 | NUTContext *nut = s->priv_data; | |
ae628ec1 | 719 | AVIOContext *bc = s->pb; |
619d8e2e | 720 | int64_t pos; |
5e534865 | 721 | int initialized_stream_count; |
619d8e2e | 722 | |
a559d65c | 723 | nut->avf = s; |
619d8e2e MN |
724 | |
725 | /* main header */ | |
a559d65c AL |
726 | pos = 0; |
727 | do { | |
728 | pos = find_startcode(bc, MAIN_STARTCODE, pos) + 1; | |
729 | if (pos < 0 + 1) { | |
93951943 | 730 | av_log(s, AV_LOG_ERROR, "No main startcode found.\n"); |
254f3dab | 731 | goto fail; |
619d8e2e | 732 | } |
a559d65c | 733 | } while (decode_main_header(nut) < 0); |
619d8e2e MN |
734 | |
735 | /* stream headers */ | |
a559d65c AL |
736 | pos = 0; |
737 | for (initialized_stream_count = 0; initialized_stream_count < s->nb_streams;) { | |
738 | pos = find_startcode(bc, STREAM_STARTCODE, pos) + 1; | |
739 | if (pos < 0 + 1) { | |
93951943 | 740 | av_log(s, AV_LOG_ERROR, "Not all stream headers found.\n"); |
254f3dab | 741 | goto fail; |
619d8e2e | 742 | } |
a559d65c | 743 | if (decode_stream_header(nut) >= 0) |
5e534865 | 744 | initialized_stream_count++; |
619d8e2e MN |
745 | } |
746 | ||
747 | /* info headers */ | |
a559d65c AL |
748 | pos = 0; |
749 | for (;;) { | |
750 | uint64_t startcode = find_any_startcode(bc, pos); | |
751 | pos = avio_tell(bc); | |
619d8e2e | 752 | |
a559d65c | 753 | if (startcode == 0) { |
619d8e2e | 754 | av_log(s, AV_LOG_ERROR, "EOF before video frames\n"); |
254f3dab | 755 | goto fail; |
a559d65c AL |
756 | } else if (startcode == SYNCPOINT_STARTCODE) { |
757 | nut->next_startcode = startcode; | |
619d8e2e | 758 | break; |
a559d65c | 759 | } else if (startcode != INFO_STARTCODE) { |
619d8e2e MN |
760 | continue; |
761 | } | |
762 | ||
763 | decode_info_header(nut); | |
764 | } | |
765 | ||
9deaec78 | 766 | s->internal->data_offset = pos - 8; |
faf7cbf1 | 767 | |
a559d65c AL |
768 | if (bc->seekable) { |
769 | int64_t orig_pos = avio_tell(bc); | |
e8272029 | 770 | find_and_decode_index(nut); |
6b4aa5da | 771 | avio_seek(bc, orig_pos, SEEK_SET); |
e8272029 MN |
772 | } |
773 | assert(nut->next_startcode == SYNCPOINT_STARTCODE); | |
774 | ||
03700d39 AK |
775 | ff_metadata_conv_ctx(s, NULL, ff_nut_metadata_conv); |
776 | ||
619d8e2e | 777 | return 0; |
254f3dab LB |
778 | |
779 | fail: | |
780 | nut_read_close(s); | |
781 | ||
782 | return AVERROR_INVALIDDATA; | |
619d8e2e MN |
783 | } |
784 | ||
a559d65c AL |
785 | static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, |
786 | uint8_t *header_idx, int frame_code) | |
787 | { | |
788 | AVFormatContext *s = nut->avf; | |
789 | AVIOContext *bc = s->pb; | |
619d8e2e MN |
790 | StreamContext *stc; |
791 | int size, flags, size_mul, pts_delta, i, reserved_count; | |
792 | uint64_t tmp; | |
793 | ||
c94e2e85 LB |
794 | if (!(nut->flags & NUT_PIPE) && |
795 | avio_tell(bc) > nut->last_syncpoint_pos + nut->max_distance) { | |
a559d65c AL |
796 | av_log(s, AV_LOG_ERROR, |
797 | "Last frame must have been damaged %"PRId64" > %"PRId64" + %d\n", | |
798 | avio_tell(bc), nut->last_syncpoint_pos, nut->max_distance); | |
0d3ee135 | 799 | return AVERROR_INVALIDDATA; |
619d8e2e MN |
800 | } |
801 | ||
802 | flags = nut->frame_code[frame_code].flags; | |
803 | size_mul = nut->frame_code[frame_code].size_mul; | |
804 | size = nut->frame_code[frame_code].size_lsb; | |
805 | *stream_id = nut->frame_code[frame_code].stream_id; | |
806 | pts_delta = nut->frame_code[frame_code].pts_delta; | |
807 | reserved_count = nut->frame_code[frame_code].reserved_count; | |
3b4f69ae | 808 | *header_idx = nut->frame_code[frame_code].header_idx; |
619d8e2e | 809 | |
a559d65c | 810 | if (flags & FLAG_INVALID) |
0d3ee135 | 811 | return AVERROR_INVALIDDATA; |
a559d65c | 812 | if (flags & FLAG_CODED) |
4839c192 | 813 | flags ^= ffio_read_varlen(bc); |
a559d65c | 814 | if (flags & FLAG_STREAM_ID) { |
72d30b27 | 815 | GET_V(*stream_id, tmp < s->nb_streams); |
619d8e2e | 816 | } |
a559d65c AL |
817 | stc = &nut->stream[*stream_id]; |
818 | if (flags & FLAG_CODED_PTS) { | |
819 | int coded_pts = ffio_read_varlen(bc); | |
820 | // FIXME check last_pts validity? | |
821 | if (coded_pts < (1 << stc->msb_pts_shift)) { | |
822 | *pts = ff_lsb2full(stc, coded_pts); | |
823 | } else | |
824 | *pts = coded_pts - (1 << stc->msb_pts_shift); | |
825 | } else | |
826 | *pts = stc->last_pts + pts_delta; | |
827 | if (flags & FLAG_SIZE_MSB) | |
828 | size += size_mul * ffio_read_varlen(bc); | |
829 | if (flags & FLAG_MATCH_TIME) | |
7eeebcc5 | 830 | get_s(bc); |
a559d65c AL |
831 | if (flags & FLAG_HEADER_IDX) |
832 | *header_idx = ffio_read_varlen(bc); | |
833 | if (flags & FLAG_RESERVED) | |
834 | reserved_count = ffio_read_varlen(bc); | |
835 | for (i = 0; i < reserved_count; i++) | |
4839c192 | 836 | ffio_read_varlen(bc); |
3b4f69ae | 837 | |
a559d65c | 838 | if (*header_idx >= (unsigned)nut->header_count) { |
3b4f69ae | 839 | av_log(s, AV_LOG_ERROR, "header_idx invalid\n"); |
0d3ee135 | 840 | return AVERROR_INVALIDDATA; |
3b4f69ae | 841 | } |
a559d65c AL |
842 | if (size > 4096) |
843 | *header_idx = 0; | |
3b4f69ae MN |
844 | size -= nut->header_len[*header_idx]; |
845 | ||
a559d65c AL |
846 | if (flags & FLAG_CHECKSUM) { |
847 | avio_rb32(bc); // FIXME check this | |
c94e2e85 LB |
848 | } else if (!(nut->flags & NUT_PIPE) && |
849 | size > 2 * nut->max_distance || | |
850 | FFABS(stc->last_pts - *pts) > stc->max_pts_distance) { | |
2dbe0bd4 | 851 | av_log(s, AV_LOG_ERROR, "frame size > 2max_distance and no checksum\n"); |
0d3ee135 | 852 | return AVERROR_INVALIDDATA; |
619d8e2e | 853 | } |
619d8e2e | 854 | |
a559d65c AL |
855 | stc->last_pts = *pts; |
856 | stc->last_flags = flags; | |
619d8e2e MN |
857 | |
858 | return size; | |
859 | } | |
860 | ||
a559d65c AL |
861 | static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code) |
862 | { | |
863 | AVFormatContext *s = nut->avf; | |
864 | AVIOContext *bc = s->pb; | |
af7ca6ea | 865 | int size, stream_id, discard, ret; |
619d8e2e | 866 | int64_t pts, last_IP_pts; |
06599638 | 867 | StreamContext *stc; |
3b4f69ae | 868 | uint8_t header_idx; |
619d8e2e | 869 | |
a559d65c AL |
870 | size = decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code); |
871 | if (size < 0) | |
0d3ee135 | 872 | return size; |
619d8e2e | 873 | |
a559d65c | 874 | stc = &nut->stream[stream_id]; |
06599638 MN |
875 | |
876 | if (stc->last_flags & FLAG_KEY) | |
a559d65c AL |
877 | stc->skip_until_key_frame = 0; |
878 | ||
879 | discard = s->streams[stream_id]->discard; | |
880 | last_IP_pts = s->streams[stream_id]->last_IP_pts; | |
881 | if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) || | |
882 | (discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && | |
883 | last_IP_pts > pts) || | |
884 | discard >= AVDISCARD_ALL || | |
885 | stc->skip_until_key_frame) { | |
45a8a02a | 886 | avio_skip(bc, size); |
619d8e2e MN |
887 | return 1; |
888 | } | |
889 | ||
af7ca6ea VG |
890 | ret = av_new_packet(pkt, size + nut->header_len[header_idx]); |
891 | if (ret < 0) | |
892 | return ret; | |
3b4f69ae | 893 | memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]); |
a559d65c | 894 | pkt->pos = avio_tell(bc); // FIXME |
b7effd4e | 895 | avio_read(bc, pkt->data + nut->header_len[header_idx], size); |
3b4f69ae | 896 | |
619d8e2e | 897 | pkt->stream_index = stream_id; |
06599638 | 898 | if (stc->last_flags & FLAG_KEY) |
cc947f04 | 899 | pkt->flags |= AV_PKT_FLAG_KEY; |
619d8e2e MN |
900 | pkt->pts = pts; |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
905 | static int nut_read_packet(AVFormatContext *s, AVPacket *pkt) | |
906 | { | |
907 | NUTContext *nut = s->priv_data; | |
ae628ec1 | 908 | AVIOContext *bc = s->pb; |
a559d65c | 909 | int i, frame_code = 0, ret, skip; |
4d5be986 | 910 | int64_t ts, back_ptr; |
619d8e2e | 911 | |
a559d65c AL |
912 | for (;;) { |
913 | int64_t pos = avio_tell(bc); | |
914 | uint64_t tmp = nut->next_startcode; | |
915 | nut->next_startcode = 0; | |
619d8e2e | 916 | |
a559d65c AL |
917 | if (tmp) { |
918 | pos -= 8; | |
919 | } else { | |
b7effd4e | 920 | frame_code = avio_r8(bc); |
a559d65c | 921 | if (bc->eof_reached) |
e0c53c34 | 922 | return AVERROR_EOF; |
a559d65c AL |
923 | if (frame_code == 'N') { |
924 | tmp = frame_code; | |
925 | for (i = 1; i < 8; i++) | |
926 | tmp = (tmp << 8) + avio_r8(bc); | |
619d8e2e MN |
927 | } |
928 | } | |
a559d65c | 929 | switch (tmp) { |
619d8e2e MN |
930 | case MAIN_STARTCODE: |
931 | case STREAM_STARTCODE: | |
932 | case INDEX_STARTCODE: | |
a559d65c | 933 | skip = get_packetheader(nut, bc, 0, tmp); |
45a8a02a | 934 | avio_skip(bc, skip); |
619d8e2e MN |
935 | break; |
936 | case INFO_STARTCODE: | |
a559d65c | 937 | if (decode_info_header(nut) < 0) |
619d8e2e MN |
938 | goto resync; |
939 | break; | |
940 | case SYNCPOINT_STARTCODE: | |
a559d65c | 941 | if (decode_syncpoint(nut, &ts, &back_ptr) < 0) |
619d8e2e | 942 | goto resync; |
b7effd4e | 943 | frame_code = avio_r8(bc); |
619d8e2e | 944 | case 0: |
a559d65c AL |
945 | ret = decode_frame(nut, pkt, frame_code); |
946 | if (ret == 0) | |
619d8e2e | 947 | return 0; |
a559d65c | 948 | else if (ret == 1) // OK but discard packet |
619d8e2e MN |
949 | break; |
950 | default: | |
951 | resync: | |
a559d65c AL |
952 | av_log(s, AV_LOG_DEBUG, "syncing from %"PRId64"\n", pos); |
953 | tmp = find_any_startcode(bc, nut->last_syncpoint_pos + 1); | |
954 | if (tmp == 0) | |
0d3ee135 | 955 | return AVERROR_INVALIDDATA; |
a559d65c AL |
956 | av_log(s, AV_LOG_DEBUG, "sync\n"); |
957 | nut->next_startcode = tmp; | |
619d8e2e MN |
958 | } |
959 | } | |
960 | } | |
961 | ||
a559d65c AL |
962 | static int64_t nut_read_timestamp(AVFormatContext *s, int stream_index, |
963 | int64_t *pos_arg, int64_t pos_limit) | |
964 | { | |
faf7cbf1 | 965 | NUTContext *nut = s->priv_data; |
ae628ec1 | 966 | AVIOContext *bc = s->pb; |
4d5be986 | 967 | int64_t pos, pts, back_ptr; |
a559d65c AL |
968 | av_log(s, AV_LOG_DEBUG, "read_timestamp(X,%d,%"PRId64",%"PRId64")\n", |
969 | stream_index, *pos_arg, pos_limit); | |
faf7cbf1 | 970 | |
a559d65c AL |
971 | pos = *pos_arg; |
972 | do { | |
973 | pos = find_startcode(bc, SYNCPOINT_STARTCODE, pos) + 1; | |
974 | if (pos < 1) { | |
faf7cbf1 | 975 | assert(nut->next_startcode == 0); |
93951943 | 976 | av_log(s, AV_LOG_ERROR, "read_timestamp failed.\n"); |
faf7cbf1 MN |
977 | return AV_NOPTS_VALUE; |
978 | } | |
a559d65c AL |
979 | } while (decode_syncpoint(nut, &pts, &back_ptr) < 0); |
980 | *pos_arg = pos - 1; | |
faf7cbf1 MN |
981 | assert(nut->last_syncpoint_pos == *pos_arg); |
982 | ||
a559d65c AL |
983 | av_log(s, AV_LOG_DEBUG, "return %"PRId64" %"PRId64"\n", pts, back_ptr); |
984 | if (stream_index == -1) | |
985 | return pts; | |
986 | else if (stream_index == -2) | |
987 | return back_ptr; | |
4d5be986 | 988 | |
d8c772de | 989 | return AV_NOPTS_VALUE; |
faf7cbf1 MN |
990 | } |
991 | ||
a559d65c AL |
992 | static int read_seek(AVFormatContext *s, int stream_index, |
993 | int64_t pts, int flags) | |
994 | { | |
995 | NUTContext *nut = s->priv_data; | |
996 | AVStream *st = s->streams[stream_index]; | |
997 | Syncpoint dummy = { .ts = pts * av_q2d(st->time_base) * AV_TIME_BASE }; | |
998 | Syncpoint nopts_sp = { .ts = AV_NOPTS_VALUE, .back_ptr = AV_NOPTS_VALUE }; | |
999 | Syncpoint *sp, *next_node[2] = { &nopts_sp, &nopts_sp }; | |
4d5be986 | 1000 | int64_t pos, pos2, ts; |
0a3b575b | 1001 | int i; |
4d5be986 | 1002 | |
c94e2e85 LB |
1003 | if (nut->flags & NUT_PIPE) { |
1004 | return AVERROR(ENOSYS); | |
1005 | } | |
1006 | ||
a559d65c AL |
1007 | if (st->index_entries) { |
1008 | int index = av_index_search_timestamp(st, pts, flags); | |
1009 | if (index < 0) | |
071790c8 MN |
1010 | return -1; |
1011 | ||
a559d65c AL |
1012 | pos2 = st->index_entries[index].pos; |
1013 | ts = st->index_entries[index].timestamp; | |
1014 | } else { | |
f990f6e3 VS |
1015 | av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pts_cmp, |
1016 | (void **) next_node); | |
a559d65c AL |
1017 | av_log(s, AV_LOG_DEBUG, "%"PRIu64"-%"PRIu64" %"PRId64"-%"PRId64"\n", |
1018 | next_node[0]->pos, next_node[1]->pos, next_node[0]->ts, | |
1019 | next_node[1]->ts); | |
1020 | pos = ff_gen_search(s, -1, dummy.ts, next_node[0]->pos, | |
1021 | next_node[1]->pos, next_node[1]->pos, | |
1022 | next_node[0]->ts, next_node[1]->ts, | |
1023 | AVSEEK_FLAG_BACKWARD, &ts, nut_read_timestamp); | |
1024 | ||
1025 | if (!(flags & AVSEEK_FLAG_BACKWARD)) { | |
1026 | dummy.pos = pos + 16; | |
1027 | next_node[1] = &nopts_sp; | |
f990f6e3 VS |
1028 | av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, |
1029 | (void **) next_node); | |
a559d65c AL |
1030 | pos2 = ff_gen_search(s, -2, dummy.pos, next_node[0]->pos, |
1031 | next_node[1]->pos, next_node[1]->pos, | |
1032 | next_node[0]->back_ptr, next_node[1]->back_ptr, | |
1033 | flags, &ts, nut_read_timestamp); | |
1034 | if (pos2 >= 0) | |
1035 | pos = pos2; | |
1036 | // FIXME dir but I think it does not matter | |
f32554fa | 1037 | } |
a559d65c AL |
1038 | dummy.pos = pos; |
1039 | sp = av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, | |
1040 | NULL); | |
f32554fa MN |
1041 | |
1042 | assert(sp); | |
a559d65c | 1043 | pos2 = sp->back_ptr - 15; |
071790c8 MN |
1044 | } |
1045 | av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos2); | |
a559d65c | 1046 | pos = find_startcode(s->pb, SYNCPOINT_STARTCODE, pos2); |
6b4aa5da | 1047 | avio_seek(s->pb, pos, SEEK_SET); |
4d5be986 | 1048 | av_log(NULL, AV_LOG_DEBUG, "SP: %"PRId64"\n", pos); |
a559d65c | 1049 | if (pos2 > pos || pos2 + 15 < pos) |
4d5be986 | 1050 | av_log(NULL, AV_LOG_ERROR, "no syncpoint at backptr pos\n"); |
a559d65c AL |
1051 | for (i = 0; i < s->nb_streams; i++) |
1052 | nut->stream[i].skip_until_key_frame = 1; | |
0a3b575b | 1053 | |
4d5be986 MN |
1054 | return 0; |
1055 | } | |
1056 | ||
c6610a21 | 1057 | AVInputFormat ff_nut_demuxer = { |
dfc2c4d9 | 1058 | .name = "nut", |
6774247a | 1059 | .long_name = NULL_IF_CONFIG_SMALL("NUT"), |
dfc2c4d9 AK |
1060 | .priv_data_size = sizeof(NUTContext), |
1061 | .read_probe = nut_probe, | |
1062 | .read_header = nut_read_header, | |
1063 | .read_packet = nut_read_packet, | |
1064 | .read_close = nut_read_close, | |
1065 | .read_seek = read_seek, | |
20234a4b | 1066 | .extensions = "nut", |
1bd442c2 | 1067 | .codec_tag = ff_nut_codec_tags, |
619d8e2e | 1068 | }; |