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aviobuf.c
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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/opt.h"
28 #include "libavutil/avassert.h"
29 #include "avformat.h"
30 #include "avio.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 #include "url.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 4096
44 
45 typedef struct AVIOInternal {
47 } AVIOInternal;
48 
49 static void *ff_avio_child_next(void *obj, void *prev)
50 {
51  AVIOContext *s = obj;
52  AVIOInternal *internal = s->opaque;
53  return prev ? NULL : internal->h;
54 }
55 
56 static const AVClass *ff_avio_child_class_next(const AVClass *prev)
57 {
58  return prev ? NULL : &ffurl_context_class;
59 }
60 
61 #define OFFSET(x) offsetof(AVIOContext,x)
62 #define E AV_OPT_FLAG_ENCODING_PARAM
63 #define D AV_OPT_FLAG_DECODING_PARAM
64 static const AVOption ff_avio_options[] = {
65  {"protocol_whitelist", "List of protocols that are allowed to be used", OFFSET(protocol_whitelist), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, D },
66  { NULL },
67 };
68 
70  .class_name = "AVIOContext",
71  .item_name = av_default_item_name,
72  .version = LIBAVUTIL_VERSION_INT,
73  .option = ff_avio_options,
74  .child_next = ff_avio_child_next,
75  .child_class_next = ff_avio_child_class_next,
76 };
77 
78 static void fill_buffer(AVIOContext *s);
79 static int url_resetbuf(AVIOContext *s, int flags);
80 
82  unsigned char *buffer,
83  int buffer_size,
84  int write_flag,
85  void *opaque,
86  int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
87  int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
88  int64_t (*seek)(void *opaque, int64_t offset, int whence))
89 {
90  memset(s, 0, sizeof(AVIOContext));
91 
92  s->buffer = buffer;
93  s->orig_buffer_size =
94  s->buffer_size = buffer_size;
95  s->buf_ptr = buffer;
96  s->buf_ptr_max = buffer;
97  s->opaque = opaque;
98  s->direct = 0;
99 
100  url_resetbuf(s, write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
101 
104  s->seek = seek;
105  s->pos = 0;
106  s->eof_reached = 0;
107  s->error = 0;
108  s->seekable = seek ? AVIO_SEEKABLE_NORMAL : 0;
109  s->min_packet_size = 0;
110  s->max_packet_size = 0;
111  s->update_checksum = NULL;
113 
114  if (!read_packet && !write_flag) {
115  s->pos = buffer_size;
116  s->buf_end = s->buffer + buffer_size;
117  }
118  s->read_pause = NULL;
119  s->read_seek = NULL;
120 
121  s->write_data_type = NULL;
122  s->ignore_boundary_point = 0;
125  s->short_seek_get = NULL;
126  s->written = 0;
127 
128  return 0;
129 }
130 
132  unsigned char *buffer,
133  int buffer_size,
134  int write_flag,
135  void *opaque,
136  int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
137  int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
138  int64_t (*seek)(void *opaque, int64_t offset, int whence))
139 {
140  AVIOContext *s = av_malloc(sizeof(AVIOContext));
141  if (!s)
142  return NULL;
143  ffio_init_context(s, buffer, buffer_size, write_flag, opaque,
144  read_packet, write_packet, seek);
145  return s;
146 }
147 
149 {
150  av_freep(ps);
151 }
152 
153 static void writeout(AVIOContext *s, const uint8_t *data, int len)
154 {
155  if (!s->error) {
156  int ret = 0;
157  if (s->write_data_type)
158  ret = s->write_data_type(s->opaque, (uint8_t *)data,
159  len,
160  s->current_type,
161  s->last_time);
162  else if (s->write_packet)
163  ret = s->write_packet(s->opaque, (uint8_t *)data, len);
164  if (ret < 0) {
165  s->error = ret;
166  } else {
167  if (s->pos + len > s->written)
168  s->written = s->pos + len;
169  }
170  }
174  }
176  s->writeout_count ++;
177  s->pos += len;
178 }
179 
180 static void flush_buffer(AVIOContext *s)
181 {
182  s->buf_ptr_max = FFMAX(s->buf_ptr, s->buf_ptr_max);
183  if (s->write_flag && s->buf_ptr_max > s->buffer) {
184  writeout(s, s->buffer, s->buf_ptr_max - s->buffer);
185  if (s->update_checksum) {
187  s->buf_ptr_max - s->checksum_ptr);
188  s->checksum_ptr = s->buffer;
189  }
190  }
191  s->buf_ptr = s->buf_ptr_max = s->buffer;
192  if (!s->write_flag)
193  s->buf_end = s->buffer;
194 }
195 
196 void avio_w8(AVIOContext *s, int b)
197 {
198  av_assert2(b>=-128 && b<=255);
199  *s->buf_ptr++ = b;
200  if (s->buf_ptr >= s->buf_end)
201  flush_buffer(s);
202 }
203 
204 void ffio_fill(AVIOContext *s, int b, int count)
205 {
206  while (count > 0) {
207  int len = FFMIN(s->buf_end - s->buf_ptr, count);
208  memset(s->buf_ptr, b, len);
209  s->buf_ptr += len;
210 
211  if (s->buf_ptr >= s->buf_end)
212  flush_buffer(s);
213 
214  count -= len;
215  }
216 }
217 
218 void avio_write(AVIOContext *s, const unsigned char *buf, int size)
219 {
220  if (s->direct && !s->update_checksum) {
221  avio_flush(s);
222  writeout(s, buf, size);
223  return;
224  }
225  while (size > 0) {
226  int len = FFMIN(s->buf_end - s->buf_ptr, size);
227  memcpy(s->buf_ptr, buf, len);
228  s->buf_ptr += len;
229 
230  if (s->buf_ptr >= s->buf_end)
231  flush_buffer(s);
232 
233  buf += len;
234  size -= len;
235  }
236 }
237 
239 {
240  int seekback = s->write_flag ? FFMIN(0, s->buf_ptr - s->buf_ptr_max) : 0;
241  flush_buffer(s);
242  if (seekback)
243  avio_seek(s, seekback, SEEK_CUR);
244 }
245 
246 int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
247 {
248  int64_t offset1;
249  int64_t pos;
250  int force = whence & AVSEEK_FORCE;
251  int buffer_size;
252  int short_seek;
253  whence &= ~AVSEEK_FORCE;
254 
255  if(!s)
256  return AVERROR(EINVAL);
257 
258  buffer_size = s->buf_end - s->buffer;
259  // pos is the absolute position that the beginning of s->buffer corresponds to in the file
260  pos = s->pos - (s->write_flag ? 0 : buffer_size);
261 
262  if (whence != SEEK_CUR && whence != SEEK_SET)
263  return AVERROR(EINVAL);
264 
265  if (whence == SEEK_CUR) {
266  offset1 = pos + (s->buf_ptr - s->buffer);
267  if (offset == 0)
268  return offset1;
269  if (offset > INT64_MAX - offset1)
270  return AVERROR(EINVAL);
271  offset += offset1;
272  }
273  if (offset < 0)
274  return AVERROR(EINVAL);
275 
276  if (s->short_seek_get) {
277  short_seek = s->short_seek_get(s->opaque);
278  /* fallback to default short seek */
279  if (short_seek <= 0)
280  short_seek = s->short_seek_threshold;
281  } else
282  short_seek = s->short_seek_threshold;
283 
284  offset1 = offset - pos; // "offset1" is the relative offset from the beginning of s->buffer
285  s->buf_ptr_max = FFMAX(s->buf_ptr_max, s->buf_ptr);
286  if ((!s->direct || !s->seek) &&
287  offset1 >= 0 && offset1 <= (s->write_flag ? s->buf_ptr_max - s->buffer : buffer_size)) {
288  /* can do the seek inside the buffer */
289  s->buf_ptr = s->buffer + offset1;
290  } else if ((!(s->seekable & AVIO_SEEKABLE_NORMAL) ||
291  offset1 <= buffer_size + short_seek) &&
292  !s->write_flag && offset1 >= 0 &&
293  (!s->direct || !s->seek) &&
294  (whence != SEEK_END || force)) {
295  while(s->pos < offset && !s->eof_reached)
296  fill_buffer(s);
297  if (s->eof_reached)
298  return AVERROR_EOF;
299  s->buf_ptr = s->buf_end - (s->pos - offset);
300  } else if(!s->write_flag && offset1 < 0 && -offset1 < buffer_size>>1 && s->seek && offset > 0) {
301  int64_t res;
302 
303  pos -= FFMIN(buffer_size>>1, pos);
304  if ((res = s->seek(s->opaque, pos, SEEK_SET)) < 0)
305  return res;
306  s->buf_end =
307  s->buf_ptr = s->buffer;
308  s->pos = pos;
309  s->eof_reached = 0;
310  fill_buffer(s);
311  return avio_seek(s, offset, SEEK_SET | force);
312  } else {
313  int64_t res;
314  if (s->write_flag) {
315  flush_buffer(s);
316  }
317  if (!s->seek)
318  return AVERROR(EPIPE);
319  if ((res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
320  return res;
321  s->seek_count ++;
322  if (!s->write_flag)
323  s->buf_end = s->buffer;
324  s->buf_ptr = s->buf_ptr_max = s->buffer;
325  s->pos = offset;
326  }
327  s->eof_reached = 0;
328  return offset;
329 }
330 
331 int64_t avio_skip(AVIOContext *s, int64_t offset)
332 {
333  return avio_seek(s, offset, SEEK_CUR);
334 }
335 
337 {
338  int64_t size;
339 
340  if (!s)
341  return AVERROR(EINVAL);
342 
343  if (s->written)
344  return s->written;
345 
346  if (!s->seek)
347  return AVERROR(ENOSYS);
348  size = s->seek(s->opaque, 0, AVSEEK_SIZE);
349  if (size < 0) {
350  if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
351  return size;
352  size++;
353  s->seek(s->opaque, s->pos, SEEK_SET);
354  }
355  return size;
356 }
357 
359 {
360  if(!s)
361  return 0;
362  if(s->eof_reached){
363  s->eof_reached=0;
364  fill_buffer(s);
365  }
366  return s->eof_reached;
367 }
368 
369 void avio_wl32(AVIOContext *s, unsigned int val)
370 {
371  avio_w8(s, (uint8_t) val );
372  avio_w8(s, (uint8_t)(val >> 8 ));
373  avio_w8(s, (uint8_t)(val >> 16));
374  avio_w8(s, val >> 24 );
375 }
376 
377 void avio_wb32(AVIOContext *s, unsigned int val)
378 {
379  avio_w8(s, val >> 24 );
380  avio_w8(s, (uint8_t)(val >> 16));
381  avio_w8(s, (uint8_t)(val >> 8 ));
382  avio_w8(s, (uint8_t) val );
383 }
384 
385 int avio_put_str(AVIOContext *s, const char *str)
386 {
387  int len = 1;
388  if (str) {
389  len += strlen(str);
390  avio_write(s, (const unsigned char *) str, len);
391  } else
392  avio_w8(s, 0);
393  return len;
394 }
395 
396 static inline int put_str16(AVIOContext *s, const char *str, const int be)
397 {
398  const uint8_t *q = str;
399  int ret = 0;
400  int err = 0;
401 
402  while (*q) {
403  uint32_t ch;
404  uint16_t tmp;
405 
406  GET_UTF8(ch, *q++, goto invalid;)
407  PUT_UTF16(ch, tmp, be ? avio_wb16(s, tmp) : avio_wl16(s, tmp);
408  ret += 2;)
409  continue;
410 invalid:
411  av_log(s, AV_LOG_ERROR, "Invalid UTF8 sequence in avio_put_str16%s\n", be ? "be" : "le");
412  err = AVERROR(EINVAL);
413  if (!*(q-1))
414  break;
415  }
416  if (be)
417  avio_wb16(s, 0);
418  else
419  avio_wl16(s, 0);
420  if (err)
421  return err;
422  ret += 2;
423  return ret;
424 }
425 
426 #define PUT_STR16(type, big_endian) \
427 int avio_put_str16 ## type(AVIOContext *s, const char *str) \
428 { \
429 return put_str16(s, str, big_endian); \
430 }
431 
432 PUT_STR16(le, 0)
433 PUT_STR16(be, 1)
434 
435 #undef PUT_STR16
436 
437 int ff_get_v_length(uint64_t val)
438 {
439  int i = 1;
440 
441  while (val >>= 7)
442  i++;
443 
444  return i;
445 }
446 
447 void ff_put_v(AVIOContext *bc, uint64_t val)
448 {
449  int i = ff_get_v_length(val);
450 
451  while (--i > 0)
452  avio_w8(bc, 128 | (uint8_t)(val >> (7*i)));
453 
454  avio_w8(bc, val & 127);
455 }
456 
457 void avio_wl64(AVIOContext *s, uint64_t val)
458 {
459  avio_wl32(s, (uint32_t)(val & 0xffffffff));
460  avio_wl32(s, (uint32_t)(val >> 32));
461 }
462 
463 void avio_wb64(AVIOContext *s, uint64_t val)
464 {
465  avio_wb32(s, (uint32_t)(val >> 32));
466  avio_wb32(s, (uint32_t)(val & 0xffffffff));
467 }
468 
469 void avio_wl16(AVIOContext *s, unsigned int val)
470 {
471  avio_w8(s, (uint8_t)val);
472  avio_w8(s, (int)val >> 8);
473 }
474 
475 void avio_wb16(AVIOContext *s, unsigned int val)
476 {
477  avio_w8(s, (int)val >> 8);
478  avio_w8(s, (uint8_t)val);
479 }
480 
481 void avio_wl24(AVIOContext *s, unsigned int val)
482 {
483  avio_wl16(s, val & 0xffff);
484  avio_w8(s, (int)val >> 16);
485 }
486 
487 void avio_wb24(AVIOContext *s, unsigned int val)
488 {
489  avio_wb16(s, (int)val >> 8);
490  avio_w8(s, (uint8_t)val);
491 }
492 
494 {
495  if (type == AVIO_DATA_MARKER_FLUSH_POINT) {
496  if (s->buf_ptr - s->buffer >= s->min_packet_size)
497  avio_flush(s);
498  return;
499  }
500  if (!s->write_data_type)
501  return;
502  // If ignoring boundary points, just treat it as unknown
505  // Avoid unnecessary flushes if we are already in non-header/trailer
506  // data and setting the type to unknown
507  if (type == AVIO_DATA_MARKER_UNKNOWN &&
510  return;
511 
512  switch (type) {
515  // For header/trailer, ignore a new marker of the same type;
516  // consecutive header/trailer markers can be merged.
517  if (type == s->current_type)
518  return;
519  break;
520  }
521 
522  // If we've reached here, we have a new, noteworthy marker.
523  // Flush the previous data and mark the start of the new data.
524  avio_flush(s);
525  s->current_type = type;
526  s->last_time = time;
527 }
528 
529 static int read_packet_wrapper(AVIOContext *s, uint8_t *buf, int size)
530 {
531  int ret;
532 
533  if (!s->read_packet)
534  return AVERROR(EINVAL);
535  ret = s->read_packet(s->opaque, buf, size);
536 #if FF_API_OLD_AVIO_EOF_0
537  if (!ret && !s->max_packet_size) {
538  av_log(NULL, AV_LOG_WARNING, "Invalid return value 0 for stream protocol\n");
539  ret = AVERROR_EOF;
540  }
541 #else
542  av_assert2(ret || s->max_packet_size);
543 #endif
544  return ret;
545 }
546 
547 /* Input stream */
548 
549 static void fill_buffer(AVIOContext *s)
550 {
551  int max_buffer_size = s->max_packet_size ?
553  uint8_t *dst = s->buf_end - s->buffer + max_buffer_size < s->buffer_size ?
554  s->buf_end : s->buffer;
555  int len = s->buffer_size - (dst - s->buffer);
556 
557  /* can't fill the buffer without read_packet, just set EOF if appropriate */
558  if (!s->read_packet && s->buf_ptr >= s->buf_end)
559  s->eof_reached = 1;
560 
561  /* no need to do anything if EOF already reached */
562  if (s->eof_reached)
563  return;
564 
565  if (s->update_checksum && dst == s->buffer) {
566  if (s->buf_end > s->checksum_ptr)
568  s->buf_end - s->checksum_ptr);
569  s->checksum_ptr = s->buffer;
570  }
571 
572  /* make buffer smaller in case it ended up large after probing */
573  if (s->read_packet && s->orig_buffer_size && s->buffer_size > s->orig_buffer_size) {
574  if (dst == s->buffer && s->buf_ptr != dst) {
575  int ret = ffio_set_buf_size(s, s->orig_buffer_size);
576  if (ret < 0)
577  av_log(s, AV_LOG_WARNING, "Failed to decrease buffer size\n");
578 
579  s->checksum_ptr = dst = s->buffer;
580  }
581  av_assert0(len >= s->orig_buffer_size);
582  len = s->orig_buffer_size;
583  }
584 
585  len = read_packet_wrapper(s, dst, len);
586  if (len == AVERROR_EOF) {
587  /* do not modify buffer if EOF reached so that a seek back can
588  be done without rereading data */
589  s->eof_reached = 1;
590  } else if (len < 0) {
591  s->eof_reached = 1;
592  s->error= len;
593  } else {
594  s->pos += len;
595  s->buf_ptr = dst;
596  s->buf_end = dst + len;
597  s->bytes_read += len;
598  }
599 }
600 
601 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
602  unsigned int len)
603 {
604  return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
605 }
606 
607 unsigned long ff_crcEDB88320_update(unsigned long checksum, const uint8_t *buf,
608  unsigned int len)
609 {
610  return av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), checksum, buf, len);
611 }
612 
613 unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
614  unsigned int len)
615 {
616  return av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), checksum, buf, len);
617 }
618 
620 {
622  s->buf_ptr - s->checksum_ptr);
623  s->update_checksum = NULL;
624  return s->checksum;
625 }
626 
628  unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
629  unsigned long checksum)
630 {
631  s->update_checksum = update_checksum;
632  if (s->update_checksum) {
633  s->checksum = checksum;
634  s->checksum_ptr = s->buf_ptr;
635  }
636 }
637 
638 /* XXX: put an inline version */
640 {
641  if (s->buf_ptr >= s->buf_end)
642  fill_buffer(s);
643  if (s->buf_ptr < s->buf_end)
644  return *s->buf_ptr++;
645  return 0;
646 }
647 
648 int avio_read(AVIOContext *s, unsigned char *buf, int size)
649 {
650  int len, size1;
651 
652  size1 = size;
653  while (size > 0) {
654  len = FFMIN(s->buf_end - s->buf_ptr, size);
655  if (len == 0 || s->write_flag) {
656  if((s->direct || size > s->buffer_size) && !s->update_checksum) {
657  // bypass the buffer and read data directly into buf
658  len = read_packet_wrapper(s, buf, size);
659  if (len == AVERROR_EOF) {
660  /* do not modify buffer if EOF reached so that a seek back can
661  be done without rereading data */
662  s->eof_reached = 1;
663  break;
664  } else if (len < 0) {
665  s->eof_reached = 1;
666  s->error= len;
667  break;
668  } else {
669  s->pos += len;
670  s->bytes_read += len;
671  size -= len;
672  buf += len;
673  // reset the buffer
674  s->buf_ptr = s->buffer;
675  s->buf_end = s->buffer/* + len*/;
676  }
677  } else {
678  fill_buffer(s);
679  len = s->buf_end - s->buf_ptr;
680  if (len == 0)
681  break;
682  }
683  } else {
684  memcpy(buf, s->buf_ptr, len);
685  buf += len;
686  s->buf_ptr += len;
687  size -= len;
688  }
689  }
690  if (size1 == size) {
691  if (s->error) return s->error;
692  if (avio_feof(s)) return AVERROR_EOF;
693  }
694  return size1 - size;
695 }
696 
697 int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
698 {
699  int ret = avio_read(s, buf, size);
700  if (ret != size)
701  return AVERROR_INVALIDDATA;
702  return ret;
703 }
704 
705 int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data)
706 {
707  if (s->buf_end - s->buf_ptr >= size && !s->write_flag) {
708  *data = s->buf_ptr;
709  s->buf_ptr += size;
710  return size;
711  } else {
712  *data = buf;
713  return avio_read(s, buf, size);
714  }
715 }
716 
717 int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
718 {
719  int len;
720 
721  if (size < 0)
722  return -1;
723 
724  if (s->read_packet && s->write_flag) {
725  len = read_packet_wrapper(s, buf, size);
726  if (len > 0)
727  s->pos += len;
728  return len;
729  }
730 
731  len = s->buf_end - s->buf_ptr;
732  if (len == 0) {
733  /* Reset the buf_end pointer to the start of the buffer, to make sure
734  * the fill_buffer call tries to read as much data as fits into the
735  * full buffer, instead of just what space is left after buf_end.
736  * This avoids returning partial packets at the end of the buffer,
737  * for packet based inputs.
738  */
739  s->buf_end = s->buf_ptr = s->buffer;
740  fill_buffer(s);
741  len = s->buf_end - s->buf_ptr;
742  }
743  if (len > size)
744  len = size;
745  memcpy(buf, s->buf_ptr, len);
746  s->buf_ptr += len;
747  if (!len) {
748  if (s->error) return s->error;
749  if (avio_feof(s)) return AVERROR_EOF;
750  }
751  return len;
752 }
753 
754 unsigned int avio_rl16(AVIOContext *s)
755 {
756  unsigned int val;
757  val = avio_r8(s);
758  val |= avio_r8(s) << 8;
759  return val;
760 }
761 
762 unsigned int avio_rl24(AVIOContext *s)
763 {
764  unsigned int val;
765  val = avio_rl16(s);
766  val |= avio_r8(s) << 16;
767  return val;
768 }
769 
770 unsigned int avio_rl32(AVIOContext *s)
771 {
772  unsigned int val;
773  val = avio_rl16(s);
774  val |= avio_rl16(s) << 16;
775  return val;
776 }
777 
778 uint64_t avio_rl64(AVIOContext *s)
779 {
780  uint64_t val;
781  val = (uint64_t)avio_rl32(s);
782  val |= (uint64_t)avio_rl32(s) << 32;
783  return val;
784 }
785 
786 unsigned int avio_rb16(AVIOContext *s)
787 {
788  unsigned int val;
789  val = avio_r8(s) << 8;
790  val |= avio_r8(s);
791  return val;
792 }
793 
794 unsigned int avio_rb24(AVIOContext *s)
795 {
796  unsigned int val;
797  val = avio_rb16(s) << 8;
798  val |= avio_r8(s);
799  return val;
800 }
801 unsigned int avio_rb32(AVIOContext *s)
802 {
803  unsigned int val;
804  val = avio_rb16(s) << 16;
805  val |= avio_rb16(s);
806  return val;
807 }
808 
809 int ff_get_line(AVIOContext *s, char *buf, int maxlen)
810 {
811  int i = 0;
812  char c;
813 
814  do {
815  c = avio_r8(s);
816  if (c && i < maxlen-1)
817  buf[i++] = c;
818  } while (c != '\n' && c != '\r' && c);
819  if (c == '\r' && avio_r8(s) != '\n' && !avio_feof(s))
820  avio_skip(s, -1);
821 
822  buf[i] = 0;
823  return i;
824 }
825 
826 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
827 {
828  int len = ff_get_line(s, buf, maxlen);
829  while (len > 0 && av_isspace(buf[len - 1]))
830  buf[--len] = '\0';
831  return len;
832 }
833 
834 int64_t ff_read_line_to_bprint(AVIOContext *s, AVBPrint *bp)
835 {
836  int len, end;
837  int64_t read = 0;
838  char tmp[1024];
839  char c;
840 
841  do {
842  len = 0;
843  do {
844  c = avio_r8(s);
845  end = (c == '\r' || c == '\n' || c == '\0');
846  if (!end)
847  tmp[len++] = c;
848  } while (!end && len < sizeof(tmp));
849  av_bprint_append_data(bp, tmp, len);
850  read += len;
851  } while (!end);
852 
853  if (c == '\r' && avio_r8(s) != '\n' && !avio_feof(s))
854  avio_skip(s, -1);
855 
856  if (!c && s->error)
857  return s->error;
858 
859  if (!c && !read && avio_feof(s))
860  return AVERROR_EOF;
861 
862  return read;
863 }
864 
866 {
867  int64_t ret;
868 
869  av_bprint_clear(bp);
870  ret = ff_read_line_to_bprint(s, bp);
871  if (ret < 0)
872  return ret;
873 
874  if (!av_bprint_is_complete(bp))
875  return AVERROR(ENOMEM);
876 
877  return bp->len;
878 }
879 
880 int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
881 {
882  int i;
883 
884  if (buflen <= 0)
885  return AVERROR(EINVAL);
886  // reserve 1 byte for terminating 0
887  buflen = FFMIN(buflen - 1, maxlen);
888  for (i = 0; i < buflen; i++)
889  if (!(buf[i] = avio_r8(s)))
890  return i + 1;
891  buf[i] = 0;
892  for (; i < maxlen; i++)
893  if (!avio_r8(s))
894  return i + 1;
895  return maxlen;
896 }
897 
898 #define GET_STR16(type, read) \
899  int avio_get_str16 ##type(AVIOContext *pb, int maxlen, char *buf, int buflen)\
900 {\
901  char* q = buf;\
902  int ret = 0;\
903  if (buflen <= 0) \
904  return AVERROR(EINVAL); \
905  while (ret + 1 < maxlen) {\
906  uint8_t tmp;\
907  uint32_t ch;\
908  GET_UTF16(ch, (ret += 2) <= maxlen ? read(pb) : 0, break;)\
909  if (!ch)\
910  break;\
911  PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)\
912  }\
913  *q = 0;\
914  return ret;\
915 }\
916 
917 GET_STR16(le, avio_rl16)
918 GET_STR16(be, avio_rb16)
919 
920 #undef GET_STR16
921 
922 uint64_t avio_rb64(AVIOContext *s)
923 {
924  uint64_t val;
925  val = (uint64_t)avio_rb32(s) << 32;
926  val |= (uint64_t)avio_rb32(s);
927  return val;
928 }
929 
931  uint64_t val = 0;
932  int tmp;
933 
934  do{
935  tmp = avio_r8(bc);
936  val= (val<<7) + (tmp&127);
937  }while(tmp&128);
938  return val;
939 }
940 
941 static int io_read_packet(void *opaque, uint8_t *buf, int buf_size)
942 {
943  AVIOInternal *internal = opaque;
944  return ffurl_read(internal->h, buf, buf_size);
945 }
946 
947 static int io_write_packet(void *opaque, uint8_t *buf, int buf_size)
948 {
949  AVIOInternal *internal = opaque;
950  return ffurl_write(internal->h, buf, buf_size);
951 }
952 
953 static int64_t io_seek(void *opaque, int64_t offset, int whence)
954 {
955  AVIOInternal *internal = opaque;
956  return ffurl_seek(internal->h, offset, whence);
957 }
958 
959 static int io_short_seek(void *opaque)
960 {
961  AVIOInternal *internal = opaque;
962  return ffurl_get_short_seek(internal->h);
963 }
964 
965 static int io_read_pause(void *opaque, int pause)
966 {
967  AVIOInternal *internal = opaque;
968  if (!internal->h->prot->url_read_pause)
969  return AVERROR(ENOSYS);
970  return internal->h->prot->url_read_pause(internal->h, pause);
971 }
972 
973 static int64_t io_read_seek(void *opaque, int stream_index, int64_t timestamp, int flags)
974 {
975  AVIOInternal *internal = opaque;
976  if (!internal->h->prot->url_read_seek)
977  return AVERROR(ENOSYS);
978  return internal->h->prot->url_read_seek(internal->h, stream_index, timestamp, flags);
979 }
980 
982 {
983  AVIOInternal *internal = NULL;
984  uint8_t *buffer = NULL;
985  int buffer_size, max_packet_size;
986 
987  max_packet_size = h->max_packet_size;
988  if (max_packet_size) {
989  buffer_size = max_packet_size; /* no need to bufferize more than one packet */
990  } else {
991  buffer_size = IO_BUFFER_SIZE;
992  }
993  buffer = av_malloc(buffer_size);
994  if (!buffer)
995  return AVERROR(ENOMEM);
996 
997  internal = av_mallocz(sizeof(*internal));
998  if (!internal)
999  goto fail;
1000 
1001  internal->h = h;
1002 
1003  *s = avio_alloc_context(buffer, buffer_size, h->flags & AVIO_FLAG_WRITE,
1004  internal, io_read_packet, io_write_packet, io_seek);
1005  if (!*s)
1006  goto fail;
1007 
1008  (*s)->protocol_whitelist = av_strdup(h->protocol_whitelist);
1009  if (!(*s)->protocol_whitelist && h->protocol_whitelist) {
1010  avio_closep(s);
1011  goto fail;
1012  }
1013  (*s)->protocol_blacklist = av_strdup(h->protocol_blacklist);
1014  if (!(*s)->protocol_blacklist && h->protocol_blacklist) {
1015  avio_closep(s);
1016  goto fail;
1017  }
1018  (*s)->direct = h->flags & AVIO_FLAG_DIRECT;
1019 
1020  (*s)->seekable = h->is_streamed ? 0 : AVIO_SEEKABLE_NORMAL;
1021  (*s)->max_packet_size = max_packet_size;
1022  (*s)->min_packet_size = h->min_packet_size;
1023  if(h->prot) {
1024  (*s)->read_pause = io_read_pause;
1025  (*s)->read_seek = io_read_seek;
1026 
1027  if (h->prot->url_read_seek)
1028  (*s)->seekable |= AVIO_SEEKABLE_TIME;
1029  }
1030  (*s)->short_seek_get = io_short_seek;
1031  (*s)->av_class = &ff_avio_class;
1032  return 0;
1033 fail:
1034  av_freep(&internal);
1035  av_freep(&buffer);
1036  return AVERROR(ENOMEM);
1037 }
1038 
1040 {
1041  AVIOInternal *internal;
1042  if (!s)
1043  return NULL;
1044 
1045  internal = s->opaque;
1046  if (internal && s->read_packet == io_read_packet)
1047  return internal->h;
1048  else
1049  return NULL;
1050 }
1051 
1052 int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
1053 {
1054  uint8_t *buffer;
1055  int max_buffer_size = s->max_packet_size ?
1057  int filled = s->buf_end - s->buffer;
1058  ptrdiff_t checksum_ptr_offset = s->checksum_ptr ? s->checksum_ptr - s->buffer : -1;
1059 
1060  buf_size += s->buf_ptr - s->buffer + max_buffer_size;
1061 
1062  if (buf_size < filled || s->seekable || !s->read_packet)
1063  return 0;
1064  av_assert0(!s->write_flag);
1065 
1066  buffer = av_malloc(buf_size);
1067  if (!buffer)
1068  return AVERROR(ENOMEM);
1069 
1070  memcpy(buffer, s->buffer, filled);
1071  av_free(s->buffer);
1072  s->buf_ptr = buffer + (s->buf_ptr - s->buffer);
1073  s->buf_end = buffer + (s->buf_end - s->buffer);
1074  s->buffer = buffer;
1075  s->buffer_size = buf_size;
1076  if (checksum_ptr_offset >= 0)
1077  s->checksum_ptr = s->buffer + checksum_ptr_offset;
1078  return 0;
1079 }
1080 
1081 int ffio_set_buf_size(AVIOContext *s, int buf_size)
1082 {
1083  uint8_t *buffer;
1084  buffer = av_malloc(buf_size);
1085  if (!buffer)
1086  return AVERROR(ENOMEM);
1087 
1088  av_free(s->buffer);
1089  s->buffer = buffer;
1090  s->orig_buffer_size =
1091  s->buffer_size = buf_size;
1092  s->buf_ptr = s->buf_ptr_max = buffer;
1094  return 0;
1095 }
1096 
1097 static int url_resetbuf(AVIOContext *s, int flags)
1098 {
1099  av_assert1(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ);
1100 
1101  if (flags & AVIO_FLAG_WRITE) {
1102  s->buf_end = s->buffer + s->buffer_size;
1103  s->write_flag = 1;
1104  } else {
1105  s->buf_end = s->buffer;
1106  s->write_flag = 0;
1107  }
1108  return 0;
1109 }
1110 
1111 int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **bufp, int buf_size)
1112 {
1113  int64_t buffer_start;
1114  int buffer_size;
1115  int overlap, new_size, alloc_size;
1116  uint8_t *buf = *bufp;
1117 
1118  if (s->write_flag) {
1119  av_freep(bufp);
1120  return AVERROR(EINVAL);
1121  }
1122 
1123  buffer_size = s->buf_end - s->buffer;
1124 
1125  /* the buffers must touch or overlap */
1126  if ((buffer_start = s->pos - buffer_size) > buf_size) {
1127  av_freep(bufp);
1128  return AVERROR(EINVAL);
1129  }
1130 
1131  overlap = buf_size - buffer_start;
1132  new_size = buf_size + buffer_size - overlap;
1133 
1134  alloc_size = FFMAX(s->buffer_size, new_size);
1135  if (alloc_size > buf_size)
1136  if (!(buf = (*bufp) = av_realloc_f(buf, 1, alloc_size)))
1137  return AVERROR(ENOMEM);
1138 
1139  if (new_size > buf_size) {
1140  memcpy(buf + buf_size, s->buffer + overlap, buffer_size - overlap);
1141  buf_size = new_size;
1142  }
1143 
1144  av_free(s->buffer);
1145  s->buf_ptr = s->buffer = buf;
1146  s->buffer_size = alloc_size;
1147  s->pos = buf_size;
1148  s->buf_end = s->buf_ptr + buf_size;
1149  s->eof_reached = 0;
1150 
1151  return 0;
1152 }
1153 
1154 int avio_open(AVIOContext **s, const char *filename, int flags)
1155 {
1156  return avio_open2(s, filename, flags, NULL, NULL);
1157 }
1158 
1159 int ffio_open_whitelist(AVIOContext **s, const char *filename, int flags,
1161  const char *whitelist, const char *blacklist
1162  )
1163 {
1164  URLContext *h;
1165  int err;
1166 
1167  err = ffurl_open_whitelist(&h, filename, flags, int_cb, options, whitelist, blacklist, NULL);
1168  if (err < 0)
1169  return err;
1170  err = ffio_fdopen(s, h);
1171  if (err < 0) {
1172  ffurl_close(h);
1173  return err;
1174  }
1175  return 0;
1176 }
1177 
1178 int avio_open2(AVIOContext **s, const char *filename, int flags,
1180 {
1181  return ffio_open_whitelist(s, filename, flags, int_cb, options, NULL, NULL);
1182 }
1183 
1184 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
1186 {
1187  return ffio_open_whitelist(pb, url, flags, int_cb, options, s->protocol_whitelist, s->protocol_blacklist);
1188 }
1189 
1191 {
1192  AVIOInternal *internal;
1193  URLContext *h;
1194 
1195  if (!s)
1196  return 0;
1197 
1198  avio_flush(s);
1199  internal = s->opaque;
1200  h = internal->h;
1201 
1202  av_freep(&s->opaque);
1203  av_freep(&s->buffer);
1204  if (s->write_flag)
1205  av_log(s, AV_LOG_VERBOSE, "Statistics: %d seeks, %d writeouts\n", s->seek_count, s->writeout_count);
1206  else
1207  av_log(s, AV_LOG_VERBOSE, "Statistics: %"PRId64" bytes read, %d seeks\n", s->bytes_read, s->seek_count);
1208  av_opt_free(s);
1209 
1210  avio_context_free(&s);
1211 
1212  return ffurl_close(h);
1213 }
1214 
1216 {
1217  int ret = avio_close(*s);
1218  *s = NULL;
1219  return ret;
1220 }
1221 
1222 int avio_printf(AVIOContext *s, const char *fmt, ...)
1223 {
1224  va_list ap;
1225  char buf[4096]; /* update doc entry in avio.h if changed */
1226  int ret;
1227 
1228  va_start(ap, fmt);
1229  ret = vsnprintf(buf, sizeof(buf), fmt, ap);
1230  va_end(ap);
1231  avio_write(s, buf, strlen(buf));
1232  return ret;
1233 }
1234 
1235 int avio_pause(AVIOContext *s, int pause)
1236 {
1237  if (!s->read_pause)
1238  return AVERROR(ENOSYS);
1239  return s->read_pause(s->opaque, pause);
1240 }
1241 
1242 int64_t avio_seek_time(AVIOContext *s, int stream_index,
1243  int64_t timestamp, int flags)
1244 {
1245  int64_t ret;
1246  if (!s->read_seek)
1247  return AVERROR(ENOSYS);
1248  ret = s->read_seek(s->opaque, stream_index, timestamp, flags);
1249  if (ret >= 0) {
1250  int64_t pos;
1251  s->buf_ptr = s->buf_end; // Flush buffer
1252  pos = s->seek(s->opaque, 0, SEEK_CUR);
1253  if (pos >= 0)
1254  s->pos = pos;
1255  else if (pos != AVERROR(ENOSYS))
1256  ret = pos;
1257  }
1258  return ret;
1259 }
1260 
1261 int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size)
1262 {
1263  int ret;
1264  char buf[1024];
1265  while (max_size) {
1266  ret = avio_read(h, buf, FFMIN(max_size, sizeof(buf)));
1267  if (ret == AVERROR_EOF)
1268  return 0;
1269  if (ret <= 0)
1270  return ret;
1271  av_bprint_append_data(pb, buf, ret);
1272  if (!av_bprint_is_complete(pb))
1273  return AVERROR(ENOMEM);
1274  max_size -= ret;
1275  }
1276  return 0;
1277 }
1278 
1280 {
1281  int ret;
1282  AVIOInternal *internal = s->opaque;
1283  URLContext *sc = internal->h;
1284  URLContext *cc = NULL;
1285  ret = ffurl_accept(sc, &cc);
1286  if (ret < 0)
1287  return ret;
1288  return ffio_fdopen(c, cc);
1289 }
1290 
1292 {
1293  AVIOInternal *internal = c->opaque;
1294  URLContext *cc = internal->h;
1295  return ffurl_handshake(cc);
1296 }
1297 
1298 /* output in a dynamic buffer */
1299 
1300 typedef struct DynBuffer {
1305 } DynBuffer;
1306 
1307 static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
1308 {
1309  DynBuffer *d = opaque;
1310  unsigned new_size, new_allocated_size;
1311 
1312  /* reallocate buffer if needed */
1313  new_size = d->pos + buf_size;
1314  new_allocated_size = d->allocated_size;
1315  if (new_size < d->pos || new_size > INT_MAX/2)
1316  return -1;
1317  while (new_size > new_allocated_size) {
1318  if (!new_allocated_size)
1319  new_allocated_size = new_size;
1320  else
1321  new_allocated_size += new_allocated_size / 2 + 1;
1322  }
1323 
1324  if (new_allocated_size > d->allocated_size) {
1325  int err;
1326  if ((err = av_reallocp(&d->buffer, new_allocated_size)) < 0) {
1327  d->allocated_size = 0;
1328  d->size = 0;
1329  return err;
1330  }
1331  d->allocated_size = new_allocated_size;
1332  }
1333  memcpy(d->buffer + d->pos, buf, buf_size);
1334  d->pos = new_size;
1335  if (d->pos > d->size)
1336  d->size = d->pos;
1337  return buf_size;
1338 }
1339 
1340 static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
1341 {
1342  unsigned char buf1[4];
1343  int ret;
1344 
1345  /* packetized write: output the header */
1346  AV_WB32(buf1, buf_size);
1347  ret = dyn_buf_write(opaque, buf1, 4);
1348  if (ret < 0)
1349  return ret;
1350 
1351  /* then the data */
1352  return dyn_buf_write(opaque, buf, buf_size);
1353 }
1354 
1355 static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
1356 {
1357  DynBuffer *d = opaque;
1358 
1359  if (whence == SEEK_CUR)
1360  offset += d->pos;
1361  else if (whence == SEEK_END)
1362  offset += d->size;
1363  if (offset < 0 || offset > 0x7fffffffLL)
1364  return -1;
1365  d->pos = offset;
1366  return 0;
1367 }
1368 
1369 static int url_open_dyn_buf_internal(AVIOContext **s, int max_packet_size)
1370 {
1371  DynBuffer *d;
1372  unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
1373 
1374  if (sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
1375  return -1;
1376  d = av_mallocz(sizeof(DynBuffer) + io_buffer_size);
1377  if (!d)
1378  return AVERROR(ENOMEM);
1379  d->io_buffer_size = io_buffer_size;
1380  *s = avio_alloc_context(d->io_buffer, d->io_buffer_size, 1, d, NULL,
1381  max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
1382  max_packet_size ? NULL : dyn_buf_seek);
1383  if(!*s) {
1384  av_free(d);
1385  return AVERROR(ENOMEM);
1386  }
1387  (*s)->max_packet_size = max_packet_size;
1388  return 0;
1389 }
1390 
1392 {
1393  return url_open_dyn_buf_internal(s, 0);
1394 }
1395 
1396 int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size)
1397 {
1398  if (max_packet_size <= 0)
1399  return -1;
1400  return url_open_dyn_buf_internal(s, max_packet_size);
1401 }
1402 
1404 {
1405  DynBuffer *d;
1406 
1407  if (!s) {
1408  *pbuffer = NULL;
1409  return 0;
1410  }
1411 
1412  avio_flush(s);
1413 
1414  d = s->opaque;
1415  *pbuffer = d->buffer;
1416 
1417  return d->size;
1418 }
1419 
1421 {
1422  DynBuffer *d;
1423  int size;
1424  static const char padbuf[AV_INPUT_BUFFER_PADDING_SIZE] = {0};
1425  int padding = 0;
1426 
1427  if (!s) {
1428  *pbuffer = NULL;
1429  return 0;
1430  }
1431 
1432  /* don't attempt to pad fixed-size packet buffers */
1433  if (!s->max_packet_size) {
1434  avio_write(s, padbuf, sizeof(padbuf));
1435  padding = AV_INPUT_BUFFER_PADDING_SIZE;
1436  }
1437 
1438  avio_flush(s);
1439 
1440  d = s->opaque;
1441  *pbuffer = d->buffer;
1442  size = d->size;
1443  av_free(d);
1444 
1445  avio_context_free(&s);
1446 
1447  return size - padding;
1448 }
1449 
1451 {
1452  uint8_t *tmp;
1453  if (!*s)
1454  return;
1455  avio_close_dyn_buf(*s, &tmp);
1456  av_free(tmp);
1457  *s = NULL;
1458 }
1459 
1460 static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
1461 {
1462  DynBuffer *d = opaque;
1463 
1464  d->pos += buf_size;
1465  if (d->pos > d->size)
1466  d->size = d->pos;
1467  return buf_size;
1468 }
1469 
1471 {
1472  int ret = url_open_dyn_buf_internal(s, 0);
1473  if (ret >= 0) {
1474  AVIOContext *pb = *s;
1476  }
1477  return ret;
1478 }
1479 
1481 {
1482  DynBuffer *d = s->opaque;
1483  int size;
1484 
1485  avio_flush(s);
1486 
1487  size = d->size;
1488  av_free(d);
1489 
1490  avio_context_free(&s);
1491 
1492  return size;
1493 }
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:457
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:131
static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
Definition: aviobuf.c:1355
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
Buffered I/O operations.
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:922
int64_t(* read_seek)(void *opaque, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp in stream with the specified stream_index.
Definition: avio.h:255
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1391
#define GET_UTF8(val, GET_BYTE, ERROR)
Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
Definition: common.h:385
int ffurl_open_whitelist(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist, const char *blacklist, URLContext *parent)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:307
#define av_realloc_f(p, o, n)
uint8_t io_buffer[1]
Definition: aviobuf.c:1304
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:475
AVOption.
Definition: opt.h:246
static int64_t io_read_seek(void *opaque, int stream_index, int64_t timestamp, int flags)
Definition: aviobuf.c:973
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int(* short_seek_get)(void *opaque)
A callback that is used instead of short_seek_threshold.
Definition: avio.h:338
const char * fmt
Definition: avisynth_c.h:769
int64_t last_time
Definition: avio.h:332
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
unsigned char * buf_ptr
Current position in the buffer.
Definition: avio.h:228
int writeout_count
writeout statistic This field is internal to libavformat and access from outside is not allowed...
Definition: avio.h:291
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
Definition: avio.h:229
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:421
#define D
Definition: aviobuf.c:63
int write_flag
true if open for writing
Definition: avio.h:240
int is_streamed
true if streamed (no seek possible), default = false
Definition: url.h:45
int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1403
#define AVIO_SEEKABLE_TIME
Seeking by timestamp with avio_seek_time() is possible.
Definition: avio.h:45
#define vsnprintf
Definition: snprintf.h:36
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:204
const char * b
Definition: vf_curves.c:116
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:762
static av_const int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.h:222
int min_packet_size
Try to buffer at least this amount of data before flushing it.
Definition: avio.h:351
int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size)
Read contents of h into print buffer, up to max_size bytes, or up to EOF.
Definition: aviobuf.c:1261
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
unsigned char * buffer
Start of the buffer.
Definition: avio.h:226
#define OFFSET(x)
Definition: aviobuf.c:61
void avio_wl24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:481
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
int flags
Definition: url.h:43
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
Definition: aviobuf.c:1215
int64_t(* seek)(void *opaque, int64_t offset, int whence)
Definition: avio.h:237
void * opaque
A private pointer, passed to the read/write/seek/...
Definition: avio.h:233
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:377
#define IO_BUFFER_SIZE
Definition: aviobuf.c:36
static const AVClass * ff_avio_child_class_next(const AVClass *prev)
Definition: aviobuf.c:56
static int io_read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: aviobuf.c:941
Trailer data, which doesn't contain actual content, but only for finalizing the output file...
Definition: avio.h:140
Format I/O context.
Definition: avformat.h:1351
int avio_accept(AVIOContext *s, AVIOContext **c)
Accept and allocate a client context on a server context.
Definition: aviobuf.c:1279
URLContext * h
Definition: aviobuf.c:46
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:385
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
uint8_t
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
A point in the output bytestream where the underlying AVIOContext might flush the buffer depending on...
Definition: avio.h:146
static void fill_buffer(AVIOContext *s)
Definition: aviobuf.c:549
static int io_read_pause(void *opaque, int pause)
Definition: aviobuf.c:965
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
unsigned long ffio_get_checksum(AVIOContext *s)
Definition: aviobuf.c:619
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:493
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
int ffio_open_null_buf(AVIOContext **s)
Open a write-only fake memory stream.
Definition: aviobuf.c:1470
URLContext * ffio_geturlcontext(AVIOContext *s)
Return the URLContext associated with the AVIOContext.
Definition: aviobuf.c:1039
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:128
void av_bprint_append_data(AVBPrint *buf, const char *data, unsigned size)
Append data to a print buffer.
Definition: bprint.c:158
Public header for CRC hash function implementation.
int64_t bytes_read
Bytes read statistic This field is internal to libavformat and access from outside is not allowed...
Definition: avio.h:279
char * protocol_whitelist
',' separated list of allowed protocols.
Definition: avformat.h:1911
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int ffio_set_buf_size(AVIOContext *s, int buf_size)
Definition: aviobuf.c:1081
int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data)
Read size bytes from AVIOContext, returning a pointer.
Definition: aviobuf.c:705
ptrdiff_t size
Definition: opengl_enc.c:101
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:487
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
int ffio_open_whitelist(AVIOContext **s, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist, const char *blacklist)
Definition: aviobuf.c:1159
unsigned long ff_crcEDB88320_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
Definition: aviobuf.c:607
#define av_log(a,...)
static void flush_buffer(AVIOContext *s)
Definition: aviobuf.c:180
int max_packet_size
Definition: avio.h:241
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
int64_t written
Definition: avio.h:340
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int io_buffer_size
Definition: aviobuf.c:1303
int(* write_packet)(void *opaque, uint8_t *buf, int buf_size)
Definition: avio.h:236
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:794
const AVIOInterruptCB int_cb
Definition: ffmpeg.c:481
static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
Definition: aviobuf.c:1340
const char * protocol_whitelist
Definition: url.h:49
int(* read_packet)(void *opaque, uint8_t *buf, int buf_size)
Definition: avio.h:235
static const AVOption ff_avio_options[]
Definition: aviobuf.c:64
#define AVERROR(e)
Definition: error.h:43
int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp)
Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting its contents.
Definition: aviobuf.c:865
simple assert() macros that are a bit more flexible than ISO C assert().
unsigned long checksum
Definition: avio.h:242
static void * ff_avio_child_next(void *obj, void *prev)
Definition: aviobuf.c:49
#define SHORT_SEEK_THRESHOLD
Do seeks within this distance ahead of the current buffer by skipping data instead of calling the pro...
Definition: aviobuf.c:43
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
#define FFMAX(a, b)
Definition: common.h:94
int direct
avio_read and avio_write should if possible be satisfied directly instead of going through a buffer...
Definition: avio.h:273
#define fail()
Definition: checkasm.h:117
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:754
static int read_packet_wrapper(AVIOContext *s, uint8_t *buf, int size)
Definition: aviobuf.c:529
int seek_count
seek statistic This field is internal to libavformat and access from outside is not allowed...
Definition: avio.h:285
int avio_pause(AVIOContext *s, int pause)
Pause and resume playing - only meaningful if using a network streaming protocol (e.g.
Definition: aviobuf.c:1235
int(* write_data_type)(void *opaque, uint8_t *buf, int buf_size, enum AVIODataMarkerType type, int64_t time)
A callback that is used instead of write_packet.
Definition: avio.h:319
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:770
This is any, unlabelled data.
Definition: avio.h:135
int size
Definition: aviobuf.c:1301
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:697
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int ffurl_get_short_seek(URLContext *h)
Return the current short seek threshold value for this URL.
Definition: avio.c:650
#define FFMIN(a, b)
Definition: common.h:96
const AVClass ff_avio_class
Definition: aviobuf.c:69
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1420
unsigned char * checksum_ptr
Definition: avio.h:243
int avio_printf(AVIOContext *s, const char *fmt,...)
Definition: aviobuf.c:1222
AVIODataMarkerType
Different data types that can be returned via the AVIO write_data_type callback.
Definition: avio.h:111
int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Definition: aviobuf.c:1184
int allocated_size
Definition: aviobuf.c:1301
int ffurl_handshake(URLContext *c)
Perform one step of the protocol handshake to accept a new client.
Definition: avio.c:234
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:392
void avio_context_free(AVIOContext **ps)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
Definition: aviobuf.c:1307
#define s(width, name)
Definition: cbs_vp9.c:257
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:809
#define GET_STR16(type, read)
Definition: aviobuf.c:898
static volatile int checksum
Definition: adler32.c:30
unsigned long(* update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size)
Definition: avio.h:244
int ffurl_accept(URLContext *s, URLContext **c)
Accept an URLContext c on an URLContext s.
Definition: avio.c:226
int buffer_size
Maximum buffer size.
Definition: avio.h:227
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:463
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size)
Open a write only packetized memory stream with a maximum packet size of 'max_packet_size'.
Definition: aviobuf.c:1396
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
const char * protocol_blacklist
Definition: url.h:50
#define PUT_STR16(type, big_endian)
Definition: aviobuf.c:426
int avio_open(AVIOContext **s, const char *filename, int flags)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:1154
static int io_short_seek(void *opaque)
Definition: aviobuf.c:959
int64_t(* url_read_seek)(URLContext *h, int stream_index, int64_t timestamp, int flags)
Definition: url.h:83
int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **bufp, int buf_size)
Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file...
Definition: aviobuf.c:1111
static int url_resetbuf(AVIOContext *s, int flags)
Definition: aviobuf.c:1097
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:778
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:1190
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
GLint GLenum type
Definition: opengl_enc.c:105
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
#define AVSEEK_FORCE
Passing this flag as the "whence" parameter to a seek function causes it to seek by any means (like r...
Definition: avio.h:539
#define AVIO_FLAG_DIRECT
Use direct mode.
Definition: avio.h:681
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:786
int pos
Definition: aviobuf.c:1301
int short_seek_threshold
Threshold to favor readahead over seek.
Definition: avio.h:304
#define PUT_UTF16(val, tmp, PUT_16BIT)
Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
Definition: common.h:472
int ignore_boundary_point
If set, don't call write_data_type separately for AVIO_DATA_MARKER_BOUNDARY_POINT, but ignore them and treat them as AVIO_DATA_MARKER_UNKNOWN (to avoid needlessly small chunks of data returned from the callback).
Definition: avio.h:326
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1450
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:1052
int(* read_pause)(void *opaque, int pause)
Pause or resume playback for network streaming protocols - e.g.
Definition: avio.h:249
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:437
#define flags(name, subs,...)
Definition: cbs_av1.c:596
int ffurl_close(URLContext *h)
Definition: avio.c:467
const AVClass ffurl_context_class
Definition: avio.c:63
void av_bprint_clear(AVBPrint *buf)
Reset the string to "" but keep internal allocated data.
Definition: bprint.c:227
int orig_buffer_size
Original buffer size used internally after probing and ensure seekback to reset the buffer size This ...
Definition: avio.h:298
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
enum AVIODataMarkerType current_type
Internal, not meant to be used from outside of AVIOContext.
Definition: avio.h:331
int avio_handshake(AVIOContext *c)
Perform one step of the protocol handshake to accept a new client.
Definition: aviobuf.c:1291
int avio_open2(AVIOContext **s, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:1178
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
Main libavformat public API header.
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1558
const OptionDef options[]
Definition: ffmpeg_opt.c:3324
int avio_get_str(AVIOContext *s, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
Definition: aviobuf.c:880
int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
Change the position that will be used by the next read/write operation on the resource accessed by h...
Definition: avio.c:434
const struct URLProtocol * prot
Definition: url.h:40
int ffio_fdopen(AVIOContext **s, URLContext *h)
Create and initialize a AVIOContext for accessing the resource referenced by the URLContext h...
Definition: aviobuf.c:981
void ffio_init_checksum(AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
Definition: aviobuf.c:627
static double c[64]
int64_t pos
position in the file of the current buffer
Definition: avio.h:238
#define AVSEEK_SIZE
ORing this as the "whence" parameter to a seek function causes it to return the filesize without seek...
Definition: avio.h:531
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:781
uint64_t ffio_read_varlen(AVIOContext *bc)
Definition: aviobuf.c:930
int64_t ff_read_line_to_bprint(AVIOContext *s, AVBPrint *bp)
Read a whole line of text from AVIOContext to an AVBPrint buffer.
Definition: aviobuf.c:834
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
unsigned char * buf_ptr_max
Maximum reached position before a backward seek in the write buffer, used keeping track of already wr...
Definition: avio.h:346
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:122
#define av_free(p)
uint8_t * buffer
Definition: aviobuf.c:1302
static int put_str16(AVIOContext *s, const char *str, const int be)
Definition: aviobuf.c:396
int eof_reached
true if eof reached
Definition: avio.h:239
static int io_write_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: aviobuf.c:947
void ff_put_v(AVIOContext *bc, uint64_t val)
Put val using a variable number of bytes.
Definition: aviobuf.c:447
int len
int ffio_close_null_buf(AVIOContext *s)
Close a null buffer.
Definition: aviobuf.c:1480
static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
Definition: aviobuf.c:1460
static void writeout(AVIOContext *s, const uint8_t *data, int len)
Definition: aviobuf.c:153
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:717
static int url_open_dyn_buf_internal(AVIOContext **s, int max_packet_size)
Definition: aviobuf.c:1369
char * protocol_blacklist
',' separated list of disallowed protocols.
Definition: avformat.h:1946
int max_packet_size
if non zero, the stream is packetized with this max packet size
Definition: url.h:44
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
#define av_freep(p)
unbuffered private I/O API
int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
Same as ff_get_line but strip the white-space characters in the text tail.
Definition: aviobuf.c:826
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
Definition: aviobuf.c:601
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:639
int min_packet_size
if non zero, the stream is packetized with this min packet size
Definition: url.h:51
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:407
static int64_t io_seek(void *opaque, int64_t offset, int whence)
Definition: aviobuf.c:953
Header data; this needs to be present for the stream to be decodeable.
Definition: avio.h:115
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int64_t avio_seek_time(AVIOContext *s, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
Definition: aviobuf.c:1242
unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
Definition: aviobuf.c:613
GLuint buffer
Definition: opengl_enc.c:102
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
static uint8_t tmp[11]
Definition: aes_ctr.c:26