FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/aviobuf.c
Date: 2026-09-18 21:01:31
Exec Total Coverage
Lines: 717 826 86.8%
Functions: 86 88 97.7%
Branches: 447 622 71.9%
Line Branch Exec Source
1 /*
2 * buffered I/O
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/bprint.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/dict.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/mem.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/avassert.h"
30 #include "libavcodec/defs.h"
31 #include "avio.h"
32 #include "avio_internal.h"
33 #include "internal.h"
34 #include <stdarg.h>
35
36 #define IO_BUFFER_SIZE 32768
37
38 /**
39 * Do seeks within this distance ahead of the current buffer by skipping
40 * data instead of calling the protocol seek function, for seekable
41 * protocols.
42 */
43 #define SHORT_SEEK_THRESHOLD 32768
44
45 static void fill_buffer(AVIOContext *s);
46 static int url_resetbuf(AVIOContext *s, int flags);
47 /** @warning must be called before any I/O */
48 static int set_buf_size(AVIOContext *s, int buf_size);
49
50 252649 void ffio_init_context(FFIOContext *ctx,
51 unsigned char *buffer,
52 int buffer_size,
53 int write_flag,
54 void *opaque,
55 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
56 int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
57 int64_t (*seek)(void *opaque, int64_t offset, int whence))
58 {
59 252649 AVIOContext *const s = &ctx->pub;
60
61 252649 memset(ctx, 0, sizeof(*ctx));
62
63 252649 s->buffer = buffer;
64 252649 ctx->orig_buffer_size =
65 252649 s->buffer_size = buffer_size;
66 252649 s->buf_ptr = buffer;
67 252649 s->buf_ptr_max = buffer;
68 252649 s->opaque = opaque;
69 252649 s->direct = 0;
70
71
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 252649 url_resetbuf(s, write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
72
73 252649 s->write_packet = write_packet;
74 252649 s->read_packet = read_packet;
75 252649 s->seek = seek;
76 252649 s->pos = 0;
77 252649 s->eof_reached = 0;
78 252649 s->error = 0;
79 252649 s->seekable = seek ? AVIO_SEEKABLE_NORMAL : 0;
80 252649 s->min_packet_size = 0;
81 252649 s->max_packet_size = 0;
82 252649 s->update_checksum = NULL;
83 252649 ctx->short_seek_threshold = SHORT_SEEK_THRESHOLD;
84
85
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 252649 if (!read_packet && !write_flag) {
86 87793 s->pos = buffer_size;
87 87793 s->buf_end = s->buffer + buffer_size;
88 }
89 252649 s->read_pause = NULL;
90 252649 s->read_seek = NULL;
91
92 252649 s->write_data_type = NULL;
93 252649 s->ignore_boundary_point = 0;
94 252649 ctx->current_type = AVIO_DATA_MARKER_UNKNOWN;
95 252649 ctx->last_time = AV_NOPTS_VALUE;
96 252649 ctx->short_seek_get = NULL;
97 252649 }
98
99 87580 void ffio_init_read_context(FFIOContext *s, const uint8_t *buffer, int buffer_size)
100 {
101 87580 ffio_init_context(s, (unsigned char*)buffer, buffer_size, 0, NULL, NULL, NULL, NULL);
102 87580 }
103
104 231 void ffio_init_write_context(FFIOContext *s, uint8_t *buffer, int buffer_size)
105 {
106 231 ffio_init_context(s, buffer, buffer_size, 1, NULL, NULL, NULL, NULL);
107 231 }
108
109 117401 AVIOContext *avio_alloc_context(
110 unsigned char *buffer,
111 int buffer_size,
112 int write_flag,
113 void *opaque,
114 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
115 int (*write_packet)(void *opaque, const uint8_t *buf, int buf_size),
116 int64_t (*seek)(void *opaque, int64_t offset, int whence))
117 {
118 117401 FFIOContext *s = av_malloc(sizeof(*s));
119
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 117401 if (!s)
120 ✗ return NULL;
121 117401 ffio_init_context(s, buffer, buffer_size, write_flag, opaque,
122 read_packet, write_packet, seek);
123 117401 return &s->pub;
124 }
125
126 142597 void avio_context_free(AVIOContext **ps)
127 {
128 142597 AVIOContext *s = *ps;
129
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 142597 if (s) {
130 142595 av_freep(&s->protocol_whitelist);
131 142595 av_freep(&s->protocol_blacklist);
132 }
133 142597 av_freep(ps);
134 142597 }
135
136 448076 static void writeout(AVIOContext *s, const uint8_t *data, int len)
137 {
138 448076 FFIOContext *const ctx = ffiocontext(s);
139
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 448076 if (!s->error) {
140 448076 int ret = 0;
141
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 448076 if (s->write_data_type)
142 129 ret = s->write_data_type(s->opaque, data,
143 len,
144 ctx->current_type,
145 ctx->last_time);
146
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 447947 else if (s->write_packet)
147 447934 ret = s->write_packet(s->opaque, data, len);
148
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 448076 if (ret < 0) {
149 ✗ s->error = ret;
150 } else {
151 448076 ctx->bytes_written += len;
152 448076 s->bytes_written = ctx->bytes_written;
153
154
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 448076 if (s->pos + len > ctx->written_output_size) {
155 446144 ctx->written_output_size = s->pos + len;
156 }
157 }
158 }
159
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 448076 if (ctx->current_type == AVIO_DATA_MARKER_SYNC_POINT ||
160
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 448029 ctx->current_type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
161 52 ctx->current_type = AVIO_DATA_MARKER_UNKNOWN;
162 }
163 448076 ctx->last_time = AV_NOPTS_VALUE;
164 448076 ctx->writeout_count++;
165 448076 s->pos += len;
166 448076 }
167
168 589269 static void flush_buffer(AVIOContext *s)
169 {
170 589269 s->buf_ptr_max = FFMAX(s->buf_ptr, s->buf_ptr_max);
171
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 589269 if (s->write_flag && s->buf_ptr_max > s->buffer) {
172 440732 writeout(s, s->buffer, s->buf_ptr_max - s->buffer);
173
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 440732 if (s->update_checksum) {
174 ✗ s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
175 ✗ s->buf_ptr_max - s->checksum_ptr);
176 ✗ s->checksum_ptr = s->buffer;
177 }
178 }
179 589269 s->buf_ptr = s->buf_ptr_max = s->buffer;
180
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 589269 if (!s->write_flag)
181 107741 s->buf_end = s->buffer;
182 589269 }
183
184 3695592 void avio_w8(AVIOContext *s, int b)
185 {
186 av_assert2(b>=-128 && b<=255);
187 3695592 *s->buf_ptr++ = b;
188
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 3695592 if (s->buf_ptr >= s->buf_end)
189 65 flush_buffer(s);
190 3695592 }
191
192 34745 void ffio_fill(AVIOContext *s, int b, int64_t count)
193 {
194
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 57081 while (count > 0) {
195 22336 int len = FFMIN(s->buf_end - s->buf_ptr, count);
196 22336 memset(s->buf_ptr, b, len);
197 22336 s->buf_ptr += len;
198
199
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 22336 if (s->buf_ptr >= s->buf_end)
200 236 flush_buffer(s);
201
202 22336 count -= len;
203 }
204 34745 }
205
206 931617 void avio_write(AVIOContext *s, const unsigned char *buf, int size)
207 {
208
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 931617 if (size <= 0)
209 12834 return;
210
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 918783 if (s->direct && !s->update_checksum) {
211 7344 avio_flush(s);
212 7344 writeout(s, buf, size);
213 7344 return;
214 }
215 do {
216 1074017 int len = FFMIN(s->buf_end - s->buf_ptr, size);
217 1074017 memcpy(s->buf_ptr, buf, len);
218 1074017 s->buf_ptr += len;
219
220
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 1074017 if (s->buf_ptr >= s->buf_end)
221 163460 flush_buffer(s);
222
223 1074017 buf += len;
224 1074017 size -= len;
225
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 1074017 } while (size > 0);
226 }
227
228 422370 void avio_flush(AVIOContext *s)
229 {
230
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 422370 int seekback = s->write_flag ? FFMIN(0, s->buf_ptr - s->buf_ptr_max) : 0;
231 422370 flush_buffer(s);
232
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 422370 if (seekback)
233 128 avio_seek(s, seekback, SEEK_CUR);
234 422370 }
235
236 4101561 int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
237 {
238 4101561 FFIOContext *const ctx = ffiocontext(s);
239 int64_t offset1;
240 int64_t pos;
241 int buffer_size;
242 int short_seek;
243 4101561 whence &= ~AVSEEK_FORCE; // force flag does nothing
244
245
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 4101561 if(!s)
246 6580 return AVERROR(EINVAL);
247
248
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 4094981 if ((whence & AVSEEK_SIZE))
249 ✗ return s->seek ? s->seek(s->opaque, offset, AVSEEK_SIZE) : AVERROR(ENOSYS);
250
251 4094981 buffer_size = s->buf_end - s->buffer;
252 // pos is the absolute position that the beginning of s->buffer corresponds to in the file
253
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 4094981 pos = s->pos - (s->write_flag ? 0 : buffer_size);
254
255
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 4094981 if (whence != SEEK_CUR && whence != SEEK_SET)
256 ✗ return AVERROR(EINVAL);
257
258
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 4094981 if (whence == SEEK_CUR) {
259 3863549 offset1 = pos + (s->buf_ptr - s->buffer);
260
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 3863549 if (offset == 0)
261 3701963 return offset1;
262
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 161586 if (offset > INT64_MAX - offset1)
263 ✗ return AVERROR(EINVAL);
264 161586 offset += offset1;
265 }
266
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 393018 if (offset < 0)
267 54 return AVERROR(EINVAL);
268
269 392964 short_seek = ctx->short_seek_threshold;
270
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 392964 if (ctx->short_seek_get) {
271 375526 int tmp = ctx->short_seek_get(s->opaque);
272 375526 short_seek = FFMAX(tmp, short_seek);
273 }
274
275 392964 offset1 = offset - pos; // "offset1" is the relative offset from the beginning of s->buffer
276 392964 s->buf_ptr_max = FFMAX(s->buf_ptr_max, s->buf_ptr);
277
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 392964 if ((!s->direct || !s->seek) &&
278
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 384950 offset1 >= 0 && offset1 <= (s->write_flag ? s->buf_ptr_max - s->buffer : buffer_size)) {
279 /* can do the seek inside the buffer */
280 378321 s->buf_ptr = s->buffer + offset1;
281
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 14643 } else if ((!(s->seekable & AVIO_SEEKABLE_NORMAL) ||
282
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 14638 offset1 <= buffer_size + short_seek) &&
283
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 10602 !s->write_flag && offset1 >= 0 &&
284
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 2295 (!s->direct || !s->seek)) {
285
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 4649 while(s->pos < offset && !s->eof_reached)
286 2361 fill_buffer(s);
287
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 2288 if (s->eof_reached)
288 100 return AVERROR_EOF;
289 2188 s->buf_ptr = s->buf_end - (s->pos - offset);
290
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 12355 } else if(!s->write_flag && offset1 < 0 && -offset1 < buffer_size>>1 && s->seek && offset > 0) {
291 int64_t res;
292
293 477 pos -= FFMIN(buffer_size>>1, pos);
294
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 477 if ((res = s->seek(s->opaque, pos, SEEK_SET)) < 0)
295 ✗ return res;
296 477 s->buf_end =
297 477 s->buf_ptr = s->buffer;
298 477 s->pos = pos;
299 477 s->eof_reached = 0;
300 477 fill_buffer(s);
301 477 return avio_seek(s, offset, SEEK_SET);
302 } else {
303 int64_t res;
304
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 11878 if (s->write_flag) {
305 3138 flush_buffer(s);
306 }
307
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 11878 if (!s->seek)
308 2 return AVERROR(EPIPE);
309
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 11876 if ((res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
310 ✗ return res;
311 11876 ctx->seek_count++;
312
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 11876 if (!s->write_flag)
313 8738 s->buf_end = s->buffer;
314 11876 s->checksum_ptr = s->buf_ptr = s->buf_ptr_max = s->buffer;
315 11876 s->pos = offset;
316 }
317 392385 s->eof_reached = 0;
318 392385 return offset;
319 }
320
321 158987 int64_t avio_skip(AVIOContext *s, int64_t offset)
322 {
323 158987 return avio_seek(s, offset, SEEK_CUR);
324 }
325
326 731619 int64_t avio_size(AVIOContext *s)
327 {
328 731619 FFIOContext *const ctx = ffiocontext(s);
329 int64_t size;
330
331
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 731619 if (!s)
332 ✗ return AVERROR(EINVAL);
333
334
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 731619 if (ctx->written_output_size)
335 456913 return ctx->written_output_size;
336
337
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 274706 if (!s->seek)
338 6 return AVERROR(ENOSYS);
339 274700 size = s->seek(s->opaque, 0, AVSEEK_SIZE);
340
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 274700 if (size < 0) {
341
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 14562 if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
342 14557 return size;
343 5 size++;
344 5 s->seek(s->opaque, s->pos, SEEK_SET);
345 }
346 260143 return size;
347 }
348
349 6483020 int avio_feof(AVIOContext *s)
350 {
351
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 6483020 if(!s)
352 ✗ return 0;
353
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 6483020 if(s->eof_reached){
354 7913 s->eof_reached=0;
355 7913 fill_buffer(s);
356 }
357 6483020 return s->eof_reached;
358 }
359
360 545458 void avio_wl32(AVIOContext *s, unsigned int val)
361 {
362 545458 avio_w8(s, (uint8_t) val );
363 545458 avio_w8(s, (uint8_t)(val >> 8 ));
364 545458 avio_w8(s, (uint8_t)(val >> 16));
365 545458 avio_w8(s, val >> 24 );
366 545458 }
367
368 167239 void avio_wb32(AVIOContext *s, unsigned int val)
369 {
370 167239 avio_w8(s, val >> 24 );
371 167239 avio_w8(s, (uint8_t)(val >> 16));
372 167239 avio_w8(s, (uint8_t)(val >> 8 ));
373 167239 avio_w8(s, (uint8_t) val );
374 167239 }
375
376 629 int avio_put_str(AVIOContext *s, const char *str)
377 {
378 629 int len = 1;
379
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 629 if (str) {
380 629 len += strlen(str);
381 629 avio_write(s, (const unsigned char *) str, len);
382 } else
383 ✗ avio_w8(s, 0);
384 629 return len;
385 }
386
387 250 static inline int put_str16(AVIOContext *s, const char *str, const int be)
388 {
389 250 const uint8_t *q = str;
390 250 int ret = 0;
391 250 int err = 0;
392
393
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 2223 while (*q) {
394 uint32_t ch;
395 uint16_t tmp16;
396
397
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 2005 GET_UTF8(ch, *q++, goto invalid;)
398
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 1973 PUT_UTF16(ch, tmp16, be ? avio_wb16(s, tmp16) : avio_wl16(s, tmp16);
399 ret += 2;)
400 1973 continue;
401 ✗ invalid:
402 ✗ av_log(s, AV_LOG_ERROR, "Invalid UTF8 sequence in avio_put_str16%s\n", be ? "be" : "le");
403 ✗ err = AVERROR(EINVAL);
404 ✗ if (!*(q-1))
405 ✗ break;
406 }
407
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 250 if (be)
408 144 avio_wb16(s, 0);
409 else
410 106 avio_wl16(s, 0);
411
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 250 if (err)
412 ✗ return err;
413 250 ret += 2;
414 250 return ret;
415 }
416
417 #define PUT_STR16(type, big_endian) \
418 int avio_put_str16 ## type(AVIOContext *s, const char *str) \
419 { \
420 return put_str16(s, str, big_endian); \
421 }
422
423 106 PUT_STR16(le, 0)
424 144 PUT_STR16(be, 1)
425
426 #undef PUT_STR16
427
428 1093 void avio_wl64(AVIOContext *s, uint64_t val)
429 {
430 1093 avio_wl32(s, (uint32_t)(val & 0xffffffff));
431 1093 avio_wl32(s, (uint32_t)(val >> 32));
432 1093 }
433
434 27191 void avio_wb64(AVIOContext *s, uint64_t val)
435 {
436 27191 avio_wb32(s, (uint32_t)(val >> 32));
437 27191 avio_wb32(s, (uint32_t)(val & 0xffffffff));
438 27191 }
439
440 29589 void avio_wl16(AVIOContext *s, unsigned int val)
441 {
442 29589 avio_w8(s, (uint8_t)val);
443 29589 avio_w8(s, (int)val >> 8);
444 29589 }
445
446 88534 void avio_wb16(AVIOContext *s, unsigned int val)
447 {
448 88534 avio_w8(s, (int)val >> 8);
449 88534 avio_w8(s, (uint8_t)val);
450 88534 }
451
452 22 void avio_wl24(AVIOContext *s, unsigned int val)
453 {
454 22 avio_wl16(s, val & 0xffff);
455 22 avio_w8(s, (int)val >> 16);
456 22 }
457
458 12947 void avio_wb24(AVIOContext *s, unsigned int val)
459 {
460 12947 avio_wb16(s, (int)val >> 8);
461 12947 avio_w8(s, (uint8_t)val);
462 12947 }
463
464 648523 void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
465 {
466 648523 FFIOContext *const ctx = ffiocontext(s);
467
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 648523 if (type == AVIO_DATA_MARKER_FLUSH_POINT) {
468
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 626139 if (s->buf_ptr - s->buffer >= s->min_packet_size)
469 279615 avio_flush(s);
470 626139 return;
471 }
472
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 22384 if (!s->write_data_type)
473 22196 return;
474 // If ignoring boundary points, just treat it as unknown
475
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 188 if (type == AVIO_DATA_MARKER_BOUNDARY_POINT && s->ignore_boundary_point)
476 ✗ type = AVIO_DATA_MARKER_UNKNOWN;
477 // Avoid unnecessary flushes if we are already in non-header/trailer
478 // data and setting the type to unknown
479
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 188 if (type == AVIO_DATA_MARKER_UNKNOWN &&
480
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 29 (ctx->current_type != AVIO_DATA_MARKER_HEADER &&
481 ✗ ctx->current_type != AVIO_DATA_MARKER_TRAILER))
482 ✗ return;
483
484
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 188 switch (type) {
485 107 case AVIO_DATA_MARKER_HEADER:
486 case AVIO_DATA_MARKER_TRAILER:
487 // For header/trailer, ignore a new marker of the same type;
488 // consecutive header/trailer markers can be merged.
489
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 107 if (type == ctx->current_type)
490 11 return;
491 96 break;
492 }
493
494 // If we've reached here, we have a new, noteworthy marker.
495 // Flush the previous data and mark the start of the new data.
496 177 avio_flush(s);
497 177 ctx->current_type = type;
498 177 ctx->last_time = time;
499 }
500
501 228201 static int read_packet_wrapper(AVIOContext *s, uint8_t *buf, int size)
502 {
503 int ret;
504
505
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 228201 if (!s->read_packet)
506 3 return AVERROR(EINVAL);
507 228198 ret = s->read_packet(s->opaque, buf, size);
508 av_assert2(ret || s->max_packet_size);
509 228198 return ret;
510 }
511
512 /* Input stream */
513
514 101642 static void fill_buffer(AVIOContext *s)
515 {
516 101642 FFIOContext *const ctx = (FFIOContext *)s;
517 203284 int max_buffer_size = s->max_packet_size ?
518
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 101642 s->max_packet_size : IO_BUFFER_SIZE;
519
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 101642 uint8_t *dst = s->buf_end - s->buffer + max_buffer_size <= s->buffer_size ?
520 s->buf_end : s->buffer;
521 101642 int len = s->buffer_size - (dst - s->buffer);
522
523 /* can't fill the buffer without read_packet, just set EOF if appropriate */
524
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 101642 if (!s->read_packet && s->buf_ptr >= s->buf_end)
525 29 s->eof_reached = 1;
526
527 /* no need to do anything if EOF already reached */
528
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 101642 if (s->eof_reached)
529 11682 return;
530
531
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 89960 if (s->update_checksum && dst == s->buffer) {
532
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 441 if (s->buf_end > s->checksum_ptr)
533 368 s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
534 368 s->buf_end - s->checksum_ptr);
535 441 s->checksum_ptr = s->buffer;
536 }
537
538 /* make buffer smaller in case it ended up large after probing */
539
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 89960 if (s->read_packet && ctx->orig_buffer_size &&
540
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 89957 s->buffer_size > ctx->orig_buffer_size && len >= ctx->orig_buffer_size) {
541
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 428 if (dst == s->buffer && s->buf_ptr != dst) {
542 23 int ret = set_buf_size(s, ctx->orig_buffer_size);
543
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 23 if (ret < 0)
544 ✗ av_log(s, AV_LOG_WARNING, "Failed to decrease buffer size\n");
545
546 23 s->checksum_ptr = dst = s->buffer;
547 }
548 428 len = ctx->orig_buffer_size;
549 }
550
551 89960 len = read_packet_wrapper(s, dst, len);
552
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 89960 if (len == AVERROR_EOF) {
553 /* do not modify buffer if EOF reached so that a seek back can
554 be done without rereading data */
555 12880 s->eof_reached = 1;
556
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 77080 } else if (len < 0) {
557 3 s->eof_reached = 1;
558 3 s->error= len;
559 } else {
560 77077 s->pos += len;
561 77077 s->buf_ptr = dst;
562 77077 s->buf_end = dst + len;
563 77077 ffiocontext(s)->bytes_read += len;
564 77077 s->bytes_read = ffiocontext(s)->bytes_read;
565 }
566 }
567
568 36044 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
569 unsigned int len)
570 {
571 36044 return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
572 }
573
574 9 unsigned long ff_crcEDB88320_update(unsigned long checksum, const uint8_t *buf,
575 unsigned int len)
576 {
577 9 return av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), checksum, buf, len);
578 }
579
580 189 unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
581 unsigned int len)
582 {
583 189 return av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), checksum, buf, len);
584 }
585
586 32641 unsigned long ffio_get_checksum(AVIOContext *s)
587 {
588 65282 s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
589 32641 s->buf_ptr - s->checksum_ptr);
590 32641 s->update_checksum = NULL;
591 32641 return s->checksum;
592 }
593
594 32791 void ffio_init_checksum(AVIOContext *s,
595 unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
596 unsigned long checksum)
597 {
598 32791 s->update_checksum = update_checksum;
599
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 32791 if (s->update_checksum) {
600 32731 s->checksum = checksum;
601 32731 s->checksum_ptr = s->buf_ptr;
602 }
603 32791 }
604
605 /* XXX: put an inline version */
606 7999458 int avio_r8(AVIOContext *s)
607 {
608
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 7999458 if (s->buf_ptr >= s->buf_end)
609 26128 fill_buffer(s);
610
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 7999458 if (s->buf_ptr < s->buf_end)
611 7986952 return *s->buf_ptr++;
612 12506 return 0;
613 }
614
615 776712 int avio_read(AVIOContext *s, unsigned char *buf, int size)
616 {
617 int len, size1;
618
619 776712 size1 = size;
620
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 1622358 while (size > 0) {
621 848308 len = FFMIN(s->buf_end - s->buf_ptr, size);
622
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 848308 if (len == 0 || s->write_flag) {
623
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 182344 if((s->direct || size > s->buffer_size) && !s->update_checksum && s->read_packet) {
624 // bypass the buffer and read data directly into buf
625 138241 len = read_packet_wrapper(s, buf, size);
626
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 138241 if (len == AVERROR_EOF) {
627 /* do not modify buffer if EOF reached so that a seek back can
628 be done without rereading data */
629 585 s->eof_reached = 1;
630 585 break;
631
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 137656 } else if (len < 0) {
632 ✗ s->eof_reached = 1;
633 ✗ s->error= len;
634 ✗ break;
635 } else {
636 137656 s->pos += len;
637 137656 ffiocontext(s)->bytes_read += len;
638 137656 s->bytes_read = ffiocontext(s)->bytes_read;
639 137656 size -= len;
640 137656 buf += len;
641 // reset the buffer
642 137656 s->buf_ptr = s->buffer;
643 137656 s->buf_end = s->buffer/* + len*/;
644 }
645 } else {
646 44103 fill_buffer(s);
647 44103 len = s->buf_end - s->buf_ptr;
648
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 44103 if (len == 0)
649 2077 break;
650 }
651 } else {
652 665964 memcpy(buf, s->buf_ptr, len);
653 665964 buf += len;
654 665964 s->buf_ptr += len;
655 665964 size -= len;
656 }
657 }
658
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 776712 if (size1 == size) {
659
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 3612 if (s->error) return s->error;
660
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 3612 if (avio_feof(s)) return AVERROR_EOF;
661 }
662 774829 return size1 - size;
663 }
664
665 184076 int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
666 {
667 184076 int ret = avio_read(s, buf, size);
668
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 184076 if (ret == size)
669 183997 return ret;
670
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 79 if (ret < 0 && ret != AVERROR_EOF)
671 ✗ return ret;
672 79 return AVERROR_INVALIDDATA;
673 }
674
675 465372 int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data)
676 {
677
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 465372 if (s->buf_end - s->buf_ptr >= size && !s->write_flag) {
678 462083 *data = s->buf_ptr;
679 462083 s->buf_ptr += size;
680 462083 return size;
681 } else {
682 3289 *data = buf;
683 3289 return avio_read(s, buf, size);
684 }
685 }
686
687 607023 int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
688 {
689 int len;
690
691
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 607023 if (size < 0)
692 ✗ return AVERROR(EINVAL);
693
694
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 607023 if (s->read_packet && s->write_flag) {
695 ✗ len = read_packet_wrapper(s, buf, size);
696 ✗ if (len > 0)
697 ✗ s->pos += len;
698 ✗ return len;
699 }
700
701 607023 len = s->buf_end - s->buf_ptr;
702
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 607023 if (len == 0) {
703 20660 fill_buffer(s);
704 20660 len = s->buf_end - s->buf_ptr;
705 }
706
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 607023 if (len > size)
707 585860 len = size;
708 607023 memcpy(buf, s->buf_ptr, len);
709 607023 s->buf_ptr += len;
710
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 607023 if (!len) {
711
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 1999 if (s->error) return s->error;
712
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 1999 if (avio_feof(s)) return AVERROR_EOF;
713 }
714 605024 return len;
715 }
716
717 #define AVIO_READER(name, type, bytes, load, read1, shift1, read2, shift2) \
718 type name(AVIOContext *s) \
719 { \
720 type val; \
721 if (s->buf_end - s->buf_ptr >= bytes) { \
722 val = load(s->buf_ptr); \
723 s->buf_ptr += bytes; \
724 } else { \
725 val = (type)read1(s) << shift1; \
726 val |= (type)read2(s) << shift2; \
727 } \
728 return val; \
729 }
730
731
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 43667 AVIO_READER(avio_rl16, unsigned int, 2, AV_RL16, avio_r8, 0, avio_r8, 8)
732
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 337 AVIO_READER(avio_rl24, unsigned int, 3, AV_RL24, avio_rl16, 0, avio_r8, 16)
733
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 408751 AVIO_READER(avio_rl32, unsigned int, 4, AV_RL32, avio_rl16, 0, avio_rl16, 16)
734
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 5681 AVIO_READER(avio_rl64, uint64_t, 8, AV_RL64, avio_rl32, 0, avio_rl32, 32)
735
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 110192 AVIO_READER(avio_rb16, unsigned int, 2, AV_RB16, avio_r8, 8, avio_r8, 0)
736
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 28173 AVIO_READER(avio_rb24, unsigned int, 3, AV_RB24, avio_rb16, 8, avio_r8, 0)
737
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 247329 AVIO_READER(avio_rb32, unsigned int, 4, AV_RB32, avio_rb16, 16, avio_rb16, 0)
738
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 146323 AVIO_READER(avio_rb64, uint64_t, 8, AV_RB64, avio_rb32, 32, avio_rb32, 0)
739 1003 int ff_get_line(AVIOContext *s, char *buf, int maxlen)
740 {
741 1003 int i = 0;
742 char c;
743
744 do {
745 25968 c = avio_r8(s);
746
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 25968 if (c && i < maxlen-1)
747 25933 buf[i++] = c;
748
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 25968 } while (c != '\n' && c != '\r' && c);
749
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 1003 if (c == '\r' && avio_r8(s) != '\n' && !avio_feof(s))
750 ✗ avio_skip(s, -1);
751
752 1003 buf[i] = 0;
753 1003 return i;
754 }
755
756 302 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
757 {
758 302 int len = ff_get_line(s, buf, maxlen);
759
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 585 while (len > 0 && av_isspace(buf[len - 1]))
760 283 buf[--len] = '\0';
761 302 return len;
762 }
763
764 typedef enum FFBPrintReadStringMode {
765 FFBPrintReadString = 0,
766 FFBPrintReadLine = 1,
767 } FFBPrintReadStringMode;
768
769 338 static int64_t read_string_to_bprint(AVIOContext *s, AVBPrint *bp,
770 FFBPrintReadStringMode mode,
771 int64_t max_len)
772 {
773 int len, end;
774 338 int64_t read = 0;
775 char tmp[1024];
776 char c;
777
778
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 338 if (!max_len)
779 ✗ return 0;
780
781 do {
782 338 len = 0;
783 do {
784 5328 c = avio_r8(s);
785
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 5328 end = ((mode == FFBPrintReadLine && (c == '\r' || c == '\n')) ||
786 c == '\0');
787
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 5328 if (!end)
788 4990 tmp[len++] = c;
789
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 5328 } while (!end && len < sizeof(tmp) &&
790
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 701 ((max_len < 0) || (read + len < max_len)));
791 338 av_bprint_append_data(bp, tmp, len);
792 338 read += len;
793
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 338 } while (!end && ((max_len < 0) || (read < max_len)));
794
795
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 338 if (mode == FFBPrintReadLine &&
796 ✗ c == '\r' && avio_r8(s) != '\n' && !avio_feof(s))
797 ✗ avio_skip(s, -1);
798
799
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 338 if (!c && s->error)
800 ✗ return s->error;
801
802
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 338 if (!c && !read && avio_feof(s))
803 5 return AVERROR_EOF;
804
805 333 return read;
806 }
807
808 338 static int64_t read_string_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp,
809 FFBPrintReadStringMode mode,
810 int64_t max_len)
811 {
812 int64_t ret;
813
814 338 av_bprint_clear(bp);
815 338 ret = read_string_to_bprint(s, bp, mode, max_len);
816
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 338 if (ret < 0)
817 5 return ret;
818
819
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 333 if (!av_bprint_is_complete(bp))
820 ✗ return AVERROR(ENOMEM);
821
822 333 return bp->len;
823 }
824
825 273 int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp)
826 {
827 273 return read_string_to_bprint_overwrite(s, bp, FFBPrintReadLine, -1);
828 }
829
830 65 int64_t ff_read_string_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp,
831 int64_t max_len)
832 {
833 65 return read_string_to_bprint_overwrite(s, bp, FFBPrintReadString, max_len);
834 }
835
836 641 int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
837 {
838 int i;
839
840
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 641 if (buflen <= 0)
841 ✗ return AVERROR(EINVAL);
842 // reserve 1 byte for terminating 0
843 641 buflen = FFMIN(buflen - 1, maxlen);
844
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 9764 for (i = 0; i < buflen; i++)
845
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 9492 if (!(buf[i] = avio_r8(s)))
846 369 return i + 1;
847 272 buf[i] = 0;
848
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 542 for (; i < maxlen; i++)
849
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 280 if (!avio_r8(s))
850 10 return i + 1;
851 262 return maxlen;
852 }
853
854 #define GET_STR16(type, read) \
855 int avio_get_str16 ##type(AVIOContext *pb, int maxlen, char *buf, int buflen)\
856 {\
857 char* q = buf;\
858 int ret = 0;\
859 if (buflen <= 0) \
860 return AVERROR(EINVAL); \
861 while (ret + 1 < maxlen) {\
862 uint8_t tmp;\
863 uint32_t ch;\
864 GET_UTF16(ch, (ret += 2) <= maxlen ? read(pb) : 0, break;)\
865 if (!ch)\
866 break;\
867 PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)\
868 }\
869 *q = 0;\
870 return ret;\
871 }\
872
873
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 10302 GET_STR16(le, avio_rl16)
874
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 5586 GET_STR16(be, avio_rb16)
875
876 #undef GET_STR16
877
878 15934 uint64_t ffio_read_varlen(AVIOContext *bc){
879 15934 uint64_t val = 0;
880 int tmp;
881
882 do{
883 24651 tmp = avio_r8(bc);
884 24651 val= (val<<7) + (tmp&127);
885
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 24651 }while(tmp&128);
886 15934 return val;
887 }
888
889 1423 unsigned int ffio_read_leb(AVIOContext *s) {
890 1423 int more, i = 0;
891 1423 unsigned leb = 0;
892
893 do {
894 1955 int byte = avio_r8(s);
895 1955 unsigned bits = byte & 0x7f;
896 1955 more = byte & 0x80;
897
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 1955 if (i <= 4)
898 1955 leb |= bits << (i * 7);
899
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 1955 if (++i == 8)
900 ✗ break;
901
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 1955 } while (more);
902
903 1423 return leb;
904 }
905
906 6513 void ffio_write_leb(AVIOContext *s, unsigned val)
907 {
908 int len;
909 uint8_t byte;
910
911 6513 len = (av_log2(val) + 7) / 7;
912
913
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 17848 for (int i = 0; i < len; i++) {
914 11335 byte = val >> (7 * i) & 0x7f;
915
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 11335 if (i < len - 1)
916 4822 byte |= 0x80;
917
918 11335 avio_w8(s, byte);
919 }
920 6513 }
921
922 28 void ffio_write_lines(AVIOContext *s, const unsigned char *buf, int size,
923 const unsigned char *ending)
924 {
925
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 28 int ending_len = ending ? strlen(ending) : 1;
926
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 28 if (!ending)
927 28 ending = "\n";
928
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 28 if (size < 0)
929 ✗ size = strlen(buf);
930
931
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 467 while (size > 0) {
932 439 size_t len = 0;
933 439 char last = 0;
934
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 19804 for (; len < size; len++) {
935 19804 last = buf[len];
936
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 19804 if (last == '\r' || last == '\n')
937 break;
938 }
939
940 439 avio_write(s, buf, len);
941 439 avio_write(s, ending, ending_len);
942
943 439 buf += len + 1;
944 439 size -= len + 1;
945
946
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 439 if (size > 0 && last == '\r' && buf[0] == '\n') {
947 103 buf++;
948 103 size--;
949 }
950 }
951 28 }
952
953 16 int ffio_copy_url_options(AVIOContext* pb, AVDictionary** avio_opts)
954 {
955 16 const char *opts[] = {
956 "headers", "user_agent", "cookies", "http_proxy", "referer", "rw_timeout", "icy", "prefer_libcurl", NULL };
957 16 const char **opt = opts;
958 16 uint8_t *buf = NULL;
959 16 int ret = 0;
960
961
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 144 while (*opt) {
962
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 128 if (av_opt_get(pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
963
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 32 if (buf[0] != '\0') {
964 32 ret = av_dict_set(avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL);
965
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 32 if (ret < 0)
966 ✗ return ret;
967 } else {
968 ✗ av_freep(&buf);
969 }
970 }
971 128 opt++;
972 }
973
974 16 return ret;
975 }
976
977 15 static void update_checksum(AVIOContext *s)
978 {
979
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 15 if (s->update_checksum && s->buf_ptr > s->checksum_ptr) {
980 ✗ s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
981 ✗ s->buf_ptr - s->checksum_ptr);
982 }
983 15 }
984
985 24331 int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
986 {
987 uint8_t *buffer;
988 48662 int max_buffer_size = s->max_packet_size ?
989
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 24331 s->max_packet_size : IO_BUFFER_SIZE;
990 24331 ptrdiff_t filled = s->buf_end - s->buf_ptr;
991
992
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 24331 if (buf_size <= s->buf_end - s->buf_ptr)
993 21553 return 0;
994
995
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 2778 if (buf_size > INT_MAX - max_buffer_size)
996 ✗ return AVERROR(EINVAL);
997
998 2778 buf_size += max_buffer_size - 1;
999
1000
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 2778 if (buf_size + s->buf_ptr - s->buffer <= s->buffer_size || s->seekable || !s->read_packet)
1001 2763 return 0;
1002
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 15 av_assert0(!s->write_flag);
1003
1004
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 15 if (buf_size <= s->buffer_size) {
1005 ✗ update_checksum(s);
1006 ✗ memmove(s->buffer, s->buf_ptr, filled);
1007 } else {
1008 15 buffer = av_malloc(buf_size);
1009
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 15 if (!buffer)
1010 ✗ return AVERROR(ENOMEM);
1011 15 update_checksum(s);
1012 15 memcpy(buffer, s->buf_ptr, filled);
1013 15 av_free(s->buffer);
1014 15 s->buffer = buffer;
1015 15 s->buffer_size = buf_size;
1016 }
1017 15 s->buf_ptr = s->buffer;
1018 15 s->buf_end = s->buffer + filled;
1019 15 s->checksum_ptr = s->buffer;
1020 15 return 0;
1021 }
1022
1023 6882 int ffio_limit(AVIOContext *s, int size)
1024 {
1025 6882 FFIOContext *const ctx = ffiocontext(s);
1026
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 6882 if (ctx->maxsize >= 0) {
1027 6855 int64_t pos = avio_tell(s);
1028 6855 int64_t remaining = ctx->maxsize - pos;
1029
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 6855 if (remaining < size) {
1030 459 int64_t newsize = avio_size(s);
1031
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 459 if (!ctx->maxsize || ctx->maxsize < newsize)
1032 454 ctx->maxsize = newsize - !newsize;
1033
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 459 if (pos > ctx->maxsize && ctx->maxsize >= 0)
1034 1 ctx->maxsize = AVERROR(EIO);
1035
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 459 if (ctx->maxsize >= 0)
1036 457 remaining = ctx->maxsize - pos;
1037 }
1038
1039
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 6855 if (ctx->maxsize >= 0 && remaining < size && size > 1) {
1040 5 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG,
1041 "Truncating packet of size %d to %"PRId64"\n",
1042
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 5 size, remaining + !remaining);
1043 5 size = remaining + !remaining;
1044 }
1045 }
1046 6882 return size;
1047 }
1048
1049 23 static int set_buf_size(AVIOContext *s, int buf_size)
1050 {
1051 uint8_t *buffer;
1052 23 buffer = av_malloc(buf_size);
1053
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 23 if (!buffer)
1054 ✗ return AVERROR(ENOMEM);
1055
1056 23 av_free(s->buffer);
1057 23 s->buffer = buffer;
1058 46 ffiocontext(s)->orig_buffer_size =
1059 23 s->buffer_size = buf_size;
1060 23 s->buf_ptr = s->buf_ptr_max = buffer;
1061
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 23 url_resetbuf(s, s->write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
1062 23 return 0;
1063 }
1064
1065 ✗ int ffio_realloc_buf(AVIOContext *s, int buf_size)
1066 {
1067 uint8_t *buffer;
1068 int data_size;
1069
1070 ✗ if (!s->buffer_size)
1071 ✗ return set_buf_size(s, buf_size);
1072
1073 ✗ if (buf_size <= s->buffer_size)
1074 ✗ return 0;
1075
1076 ✗ buffer = av_malloc(buf_size);
1077 ✗ if (!buffer)
1078 ✗ return AVERROR(ENOMEM);
1079
1080 ✗ data_size = s->write_flag ? (s->buf_ptr - s->buffer) : (s->buf_end - s->buf_ptr);
1081 ✗ if (data_size > 0)
1082 ✗ memcpy(buffer, s->write_flag ? s->buffer : s->buf_ptr, data_size);
1083 ✗ av_free(s->buffer);
1084 ✗ s->buffer = buffer;
1085 ✗ ffiocontext(s)->orig_buffer_size = buf_size;
1086 ✗ s->buffer_size = buf_size;
1087 ✗ s->buf_ptr = s->write_flag ? (s->buffer + data_size) : s->buffer;
1088 ✗ if (s->write_flag)
1089 ✗ s->buf_ptr_max = s->buffer + data_size;
1090
1091 ✗ s->buf_end = s->write_flag ? (s->buffer + s->buffer_size) : (s->buf_ptr + data_size);
1092
1093 ✗ return 0;
1094 }
1095
1096 252672 static int url_resetbuf(AVIOContext *s, int flags)
1097 {
1098 av_assert1(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ);
1099
1100
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 252672 if (flags & AVIO_FLAG_WRITE) {
1101 57086 s->buf_end = s->buffer + s->buffer_size;
1102 57086 s->write_flag = 1;
1103 } else {
1104 195586 s->buf_end = s->buffer;
1105 195586 s->write_flag = 0;
1106 }
1107 252672 return 0;
1108 }
1109
1110 4136 int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **bufp, int buf_size)
1111 {
1112 int64_t buffer_start;
1113 int buffer_size;
1114 int overlap, new_size, alloc_size;
1115 4136 uint8_t *buf = *bufp;
1116
1117
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 4136 if (s->write_flag) {
1118 ✗ av_freep(bufp);
1119 ✗ return AVERROR(EINVAL);
1120 }
1121
1122 4136 buffer_size = s->buf_end - s->buffer;
1123
1124 /* the buffers must touch or overlap */
1125
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 4136 if ((buffer_start = s->pos - buffer_size) > buf_size) {
1126 ✗ av_freep(bufp);
1127 ✗ return AVERROR(EINVAL);
1128 }
1129
1130 4136 overlap = buf_size - buffer_start;
1131 4136 new_size = buf_size + buffer_size - overlap;
1132
1133 4136 alloc_size = FFMAX(s->buffer_size, new_size);
1134
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 4136 if (alloc_size > buf_size)
1135
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 4081 if (!(buf = (*bufp) = av_realloc_f(buf, 1, alloc_size)))
1136 ✗ return AVERROR(ENOMEM);
1137
1138
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 4136 if (new_size > buf_size) {
1139 3893 memcpy(buf + buf_size, s->buffer + overlap, buffer_size - overlap);
1140 3893 buf_size = new_size;
1141 }
1142
1143 4136 av_free(s->buffer);
1144 4136 s->buf_ptr = s->buffer = buf;
1145 4136 s->buffer_size = alloc_size;
1146 4136 s->pos = buf_size;
1147 4136 s->buf_end = s->buf_ptr + buf_size;
1148 4136 s->eof_reached = 0;
1149
1150 4136 return 0;
1151 }
1152
1153 26665 int avio_vprintf(AVIOContext *s, const char *fmt, va_list ap)
1154 {
1155 AVBPrint bp;
1156
1157 26665 av_bprint_init(&bp, 0, INT_MAX);
1158 26665 av_vbprintf(&bp, fmt, ap);
1159
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 26665 if (!av_bprint_is_complete(&bp)) {
1160 ✗ av_bprint_finalize(&bp, NULL);
1161 ✗ s->error = AVERROR(ENOMEM);
1162 ✗ return AVERROR(ENOMEM);
1163 }
1164 26665 avio_write(s, bp.str, bp.len);
1165 26665 av_bprint_finalize(&bp, NULL);
1166 26665 return bp.len;
1167 }
1168
1169 26398 int avio_printf(AVIOContext *s, const char *fmt, ...)
1170 {
1171 va_list ap;
1172 int ret;
1173
1174 26398 va_start(ap, fmt);
1175 26398 ret = avio_vprintf(s, fmt, ap);
1176 26398 va_end(ap);
1177
1178 26398 return ret;
1179 }
1180
1181 485 void avio_print_string_array(AVIOContext *s, const char *const strings[])
1182 {
1183
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 1940 for(; *strings; strings++)
1184 1455 avio_write(s, (const unsigned char *)*strings, strlen(*strings));
1185 485 }
1186
1187 ✗ int avio_pause(AVIOContext *s, int pause)
1188 {
1189 ✗ if (!s->read_pause)
1190 ✗ return AVERROR(ENOSYS);
1191 ✗ return s->read_pause(s->opaque, pause);
1192 }
1193
1194 315 int64_t avio_seek_time(AVIOContext *s, int stream_index,
1195 int64_t timestamp, int flags)
1196 {
1197 int64_t ret;
1198
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✗ Branch 1 not taken.
 315 if (!s->read_seek)
1199 315 return AVERROR(ENOSYS);
1200 ✗ ret = s->read_seek(s->opaque, stream_index, timestamp, flags);
1201 ✗ if (ret >= 0) {
1202 int64_t pos;
1203 ✗ s->buf_ptr = s->buf_end; // Flush buffer
1204 ✗ pos = s->seek(s->opaque, 0, SEEK_CUR);
1205 ✗ if (pos >= 0)
1206 ✗ s->pos = pos;
1207 ✗ else if (pos != AVERROR(ENOSYS))
1208 ✗ ret = pos;
1209 }
1210 ✗ return ret;
1211 }
1212
1213 77 int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size)
1214 {
1215 int ret;
1216 char buf[1024];
1217
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 8139 while (max_size) {
1218 8137 ret = avio_read(h, buf, FFMIN(max_size, sizeof(buf)));
1219
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✓ Branch 1 taken 8062 times.
 8137 if (ret == AVERROR_EOF)
1220 75 return 0;
1221
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 8062 if (ret <= 0)
1222 ✗ return ret;
1223 8062 av_bprint_append_data(pb, buf, ret);
1224
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✓ Branch 2 taken 8062 times.
 8062 if (!av_bprint_is_complete(pb))
1225 ✗ return AVERROR(ENOMEM);
1226 8062 max_size -= ret;
1227 }
1228 2 return 0;
1229 }
1230
1231 /* output in a dynamic buffer */
1232
1233 typedef struct DynBuffer {
1234 int pos, size, allocated_size;
1235 uint8_t *buffer;
1236 int io_buffer_size;
1237 uint8_t io_buffer[1];
1238 } DynBuffer;
1239
1240 38186 static int dyn_buf_write(void *opaque, const uint8_t *buf, int buf_size)
1241 {
1242 38186 DynBuffer *d = opaque;
1243 unsigned new_size;
1244
1245 /* reallocate buffer if needed */
1246 38186 new_size = (unsigned)d->pos + buf_size;
1247
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 38186 if (new_size < d->pos || new_size > INT_MAX)
1248 ✗ return AVERROR(ERANGE);
1249
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✓ Branch 1 taken 29432 times.
 38186 if (new_size > d->allocated_size) {
1250 19477 unsigned new_allocated_size = d->allocated_size ? d->allocated_size
1251
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✓ Branch 1 taken 6785 times.
 8754 : new_size;
1252 int err;
1253
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 12196 while (new_size > new_allocated_size)
1254 3442 new_allocated_size += new_allocated_size / 2 + 1;
1255
1256
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 8754 new_allocated_size = FFMIN(new_allocated_size, INT_MAX);
1257
1258
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 8754 if ((err = av_reallocp(&d->buffer, new_allocated_size)) < 0) {
1259 ✗ d->allocated_size = 0;
1260 ✗ d->size = 0;
1261 ✗ return err;
1262 }
1263 8754 d->allocated_size = new_allocated_size;
1264 }
1265 38186 memcpy(d->buffer + d->pos, buf, buf_size);
1266 38186 d->pos = new_size;
1267
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✓ Branch 1 taken 18 times.
 38186 if (d->pos > d->size)
1268 38168 d->size = d->pos;
1269 38186 return buf_size;
1270 }
1271
1272 265 static int dyn_packet_buf_write(void *opaque, const uint8_t *buf, int buf_size)
1273 {
1274 unsigned char buf1[4];
1275 int ret;
1276
1277 /* packetized write: output the header */
1278 265 AV_WB32(buf1, buf_size);
1279 265 ret = dyn_buf_write(opaque, buf1, 4);
1280
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 265 if (ret < 0)
1281 ✗ return ret;
1282
1283 /* then the data */
1284 265 return dyn_buf_write(opaque, buf, buf_size);
1285 }
1286
1287 295 static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
1288 {
1289 295 DynBuffer *d = opaque;
1290
1291
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 295 if (whence == SEEK_CUR)
1292 ✗ offset += d->pos;
1293
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 295 else if (whence == SEEK_END)
1294 ✗ offset += d->size;
1295
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 295 if (offset < 0)
1296 ✗ return AVERROR(EINVAL);
1297
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 295 if (offset > INT_MAX)
1298 ✗ return AVERROR(ERANGE);
1299 295 d->pos = offset;
1300 295 return 0;
1301 }
1302
1303 25194 static int url_open_dyn_buf_internal(AVIOContext **s, int max_packet_size)
1304 {
1305 struct { FFIOContext pb; DynBuffer d; } *ret;
1306 DynBuffer *d;
1307
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 25194 unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
1308
1309 if (sizeof(*ret) + io_buffer_size < io_buffer_size)
1310 return AVERROR(ERANGE);
1311 25194 ret = av_mallocz(sizeof(*ret) + io_buffer_size);
1312
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 25194 if (!ret)
1313 ✗ return AVERROR(ENOMEM);
1314 25194 d = &ret->d;
1315 25194 d->io_buffer_size = io_buffer_size;
1316
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 25194 ffio_init_context(&ret->pb, d->io_buffer, d->io_buffer_size, 1, d, NULL,
1317 max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
1318 max_packet_size ? NULL : dyn_buf_seek);
1319 25194 *s = &ret->pb.pub;
1320 25194 (*s)->max_packet_size = max_packet_size;
1321 25194 return 0;
1322 }
1323
1324 24945 int avio_open_dyn_buf(AVIOContext **s)
1325 {
1326 24945 return url_open_dyn_buf_internal(s, 0);
1327 }
1328
1329 38 int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size)
1330 {
1331
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 38 if (max_packet_size <= 0)
1332 ✗ return AVERROR(EINVAL);
1333 38 return url_open_dyn_buf_internal(s, max_packet_size);
1334 }
1335
1336 28880 int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
1337 {
1338 DynBuffer *d;
1339
1340
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 28880 if (!s) {
1341 ✗ *pbuffer = NULL;
1342 ✗ return 0;
1343 }
1344 28880 d = s->opaque;
1345
1346
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 28880 if (!s->error && !d->size) {
1347 28090 *pbuffer = d->io_buffer;
1348 28090 return FFMAX(s->buf_ptr, s->buf_ptr_max) - s->buffer;
1349 }
1350
1351 790 avio_flush(s);
1352
1353 790 *pbuffer = d->buffer;
1354
1355 790 return d->size;
1356 }
1357
1358 22013 void ffio_reset_dyn_buf(AVIOContext *s)
1359 {
1360 22013 DynBuffer *d = s->opaque;
1361 22013 int max_packet_size = s->max_packet_size;
1362
1363 22013 ffio_init_context(ffiocontext(s), d->io_buffer, d->io_buffer_size,
1364 1, d, NULL, s->write_packet, s->seek);
1365 22013 s->max_packet_size = max_packet_size;
1366 22013 d->pos = d->size = 0;
1367 22013 }
1368
1369 6680 int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
1370 {
1371 DynBuffer *d;
1372 int size;
1373 6680 int padding = 0;
1374
1375
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 6680 if (!s) {
1376 ✗ *pbuffer = NULL;
1377 ✗ return 0;
1378 }
1379
1380 /* don't attempt to pad fixed-size packet buffers */
1381
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 6680 if (!s->max_packet_size) {
1382 6644 ffio_fill(s, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1383 6644 padding = AV_INPUT_BUFFER_PADDING_SIZE;
1384 }
1385
1386 6680 avio_flush(s);
1387
1388 6680 d = s->opaque;
1389 6680 *pbuffer = d->buffer;
1390 6680 size = d->size;
1391
1392 6680 avio_context_free(&s);
1393
1394 6680 return size - padding;
1395 }
1396
1397 19402 void ffio_free_dyn_buf(AVIOContext **s)
1398 {
1399 DynBuffer *d;
1400
1401
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 19402 if (!*s)
1402 1099 return;
1403
1404 18303 d = (*s)->opaque;
1405 18303 av_free(d->buffer);
1406 18303 avio_context_free(s);
1407 }
1408
1409 419 static int null_buf_write(void *opaque, const uint8_t *buf, int buf_size)
1410 {
1411 419 DynBuffer *d = opaque;
1412
1413
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 419 if ((unsigned)d->pos + (unsigned)buf_size > INT_MAX)
1414 ✗ return AVERROR(ERANGE);
1415 419 d->pos += buf_size;
1416
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 419 if (d->pos > d->size)
1417 281 d->size = d->pos;
1418 419 return buf_size;
1419 }
1420
1421 211 int ffio_open_null_buf(AVIOContext **s)
1422 {
1423 211 int ret = url_open_dyn_buf_internal(s, 0);
1424
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 211 if (ret >= 0) {
1425 211 AVIOContext *pb = *s;
1426 211 pb->write_packet = null_buf_write;
1427 }
1428 211 return ret;
1429 }
1430
1431 211 int ffio_close_null_buf(AVIOContext *s)
1432 {
1433 211 DynBuffer *d = s->opaque;
1434 int size;
1435
1436 211 avio_flush(s);
1437
1438
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 211 size = s->error ? s->error : d->size;
1439
1440 211 avio_context_free(&s);
1441
1442 211 return size;
1443 }
1444