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avstring.c
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1 /*
2  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3  * Copyright (c) 2007 Mans Rullgard
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 <stdarg.h>
23 #include <stdint.h>
24 #include <stdio.h>
25 #include <string.h>
26 
27 #include "config.h"
28 #include "common.h"
29 #include "mem.h"
30 #include "avassert.h"
31 #include "avstring.h"
32 #include "bprint.h"
33 
34 int av_strstart(const char *str, const char *pfx, const char **ptr)
35 {
36  while (*pfx && *pfx == *str) {
37  pfx++;
38  str++;
39  }
40  if (!*pfx && ptr)
41  *ptr = str;
42  return !*pfx;
43 }
44 
45 int av_stristart(const char *str, const char *pfx, const char **ptr)
46 {
47  while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
48  pfx++;
49  str++;
50  }
51  if (!*pfx && ptr)
52  *ptr = str;
53  return !*pfx;
54 }
55 
56 char *av_stristr(const char *s1, const char *s2)
57 {
58  if (!*s2)
59  return (char*)(intptr_t)s1;
60 
61  do
62  if (av_stristart(s1, s2, NULL))
63  return (char*)(intptr_t)s1;
64  while (*s1++);
65 
66  return NULL;
67 }
68 
69 char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
70 {
71  size_t needle_len = strlen(needle);
72  if (!needle_len)
73  return (char*)haystack;
74  while (hay_length >= needle_len) {
75  hay_length--;
76  if (!memcmp(haystack, needle, needle_len))
77  return (char*)haystack;
78  haystack++;
79  }
80  return NULL;
81 }
82 
83 size_t av_strlcpy(char *dst, const char *src, size_t size)
84 {
85  size_t len = 0;
86  while (++len < size && *src)
87  *dst++ = *src++;
88  if (len <= size)
89  *dst = 0;
90  return len + strlen(src) - 1;
91 }
92 
93 size_t av_strlcat(char *dst, const char *src, size_t size)
94 {
95  size_t len = strlen(dst);
96  if (size <= len + 1)
97  return len + strlen(src);
98  return len + av_strlcpy(dst + len, src, size - len);
99 }
100 
101 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
102 {
103  size_t len = strlen(dst);
104  va_list vl;
105 
106  va_start(vl, fmt);
107  len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
108  va_end(vl);
109 
110  return len;
111 }
112 
113 char *av_asprintf(const char *fmt, ...)
114 {
115  char *p = NULL;
116  va_list va;
117  int len;
118 
119  va_start(va, fmt);
120  len = vsnprintf(NULL, 0, fmt, va);
121  va_end(va);
122  if (len < 0)
123  goto end;
124 
125  p = av_malloc(len + 1);
126  if (!p)
127  goto end;
128 
129  va_start(va, fmt);
130  len = vsnprintf(p, len + 1, fmt, va);
131  va_end(va);
132  if (len < 0)
133  av_freep(&p);
134 
135 end:
136  return p;
137 }
138 
139 char *av_d2str(double d)
140 {
141  char *str = av_malloc(16);
142  if (str)
143  snprintf(str, 16, "%f", d);
144  return str;
145 }
146 
147 #define WHITESPACES " \n\t"
148 
149 char *av_get_token(const char **buf, const char *term)
150 {
151  char *out = av_malloc(strlen(*buf) + 1);
152  char *ret = out, *end = out;
153  const char *p = *buf;
154  if (!out)
155  return NULL;
156  p += strspn(p, WHITESPACES);
157 
158  while (*p && !strspn(p, term)) {
159  char c = *p++;
160  if (c == '\\' && *p) {
161  *out++ = *p++;
162  end = out;
163  } else if (c == '\'') {
164  while (*p && *p != '\'')
165  *out++ = *p++;
166  if (*p) {
167  p++;
168  end = out;
169  }
170  } else {
171  *out++ = c;
172  }
173  }
174 
175  do
176  *out-- = 0;
177  while (out >= end && strspn(out, WHITESPACES));
178 
179  *buf = p;
180 
181  return ret;
182 }
183 
184 char *av_strtok(char *s, const char *delim, char **saveptr)
185 {
186  char *tok;
187 
188  if (!s && !(s = *saveptr))
189  return NULL;
190 
191  /* skip leading delimiters */
192  s += strspn(s, delim);
193 
194  /* s now points to the first non delimiter char, or to the end of the string */
195  if (!*s) {
196  *saveptr = NULL;
197  return NULL;
198  }
199  tok = s++;
200 
201  /* skip non delimiters */
202  s += strcspn(s, delim);
203  if (*s) {
204  *s = 0;
205  *saveptr = s+1;
206  } else {
207  *saveptr = NULL;
208  }
209 
210  return tok;
211 }
212 
213 int av_strcasecmp(const char *a, const char *b)
214 {
215  uint8_t c1, c2;
216  do {
217  c1 = av_tolower(*a++);
218  c2 = av_tolower(*b++);
219  } while (c1 && c1 == c2);
220  return c1 - c2;
221 }
222 
223 int av_strncasecmp(const char *a, const char *b, size_t n)
224 {
225  const char *end = a + n;
226  uint8_t c1, c2;
227  do {
228  c1 = av_tolower(*a++);
229  c2 = av_tolower(*b++);
230  } while (a < end && c1 && c1 == c2);
231  return c1 - c2;
232 }
233 
234 const char *av_basename(const char *path)
235 {
236  char *p = strrchr(path, '/');
237 
238 #if HAVE_DOS_PATHS
239  char *q = strrchr(path, '\\');
240  char *d = strchr(path, ':');
241 
242  p = FFMAX3(p, q, d);
243 #endif
244 
245  if (!p)
246  return path;
247 
248  return p + 1;
249 }
250 
251 const char *av_dirname(char *path)
252 {
253  char *p = strrchr(path, '/');
254 
255 #if HAVE_DOS_PATHS
256  char *q = strrchr(path, '\\');
257  char *d = strchr(path, ':');
258 
259  d = d ? d + 1 : d;
260 
261  p = FFMAX3(p, q, d);
262 #endif
263 
264  if (!p)
265  return ".";
266 
267  *p = '\0';
268 
269  return path;
270 }
271 
272 char *av_append_path_component(const char *path, const char *component)
273 {
274  size_t p_len, c_len;
275  char *fullpath;
276 
277  if (!path)
278  return av_strdup(component);
279  if (!component)
280  return av_strdup(path);
281 
282  p_len = strlen(path);
283  c_len = strlen(component);
284  if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2)
285  return NULL;
286  fullpath = av_malloc(p_len + c_len + 2);
287  if (fullpath) {
288  if (p_len) {
289  av_strlcpy(fullpath, path, p_len + 1);
290  if (c_len) {
291  if (fullpath[p_len - 1] != '/' && component[0] != '/')
292  fullpath[p_len++] = '/';
293  else if (fullpath[p_len - 1] == '/' && component[0] == '/')
294  p_len--;
295  }
296  }
297  av_strlcpy(&fullpath[p_len], component, c_len + 1);
298  fullpath[p_len + c_len] = 0;
299  }
300  return fullpath;
301 }
302 
303 int av_escape(char **dst, const char *src, const char *special_chars,
304  enum AVEscapeMode mode, int flags)
305 {
306  AVBPrint dstbuf;
307 
309  av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
310 
311  if (!av_bprint_is_complete(&dstbuf)) {
312  av_bprint_finalize(&dstbuf, NULL);
313  return AVERROR(ENOMEM);
314  } else {
315  av_bprint_finalize(&dstbuf, dst);
316  return dstbuf.len;
317  }
318 }
319 
320 int av_isdigit(int c)
321 {
322  return c >= '0' && c <= '9';
323 }
324 
325 int av_isgraph(int c)
326 {
327  return c > 32 && c < 127;
328 }
329 
330 int av_isspace(int c)
331 {
332  return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
333  c == '\v';
334 }
335 
336 int av_isxdigit(int c)
337 {
338  c = av_tolower(c);
339  return av_isdigit(c) || (c >= 'a' && c <= 'f');
340 }
341 
342 int av_match_name(const char *name, const char *names)
343 {
344  const char *p;
345  int len, namelen;
346 
347  if (!name || !names)
348  return 0;
349 
350  namelen = strlen(name);
351  while ((p = strchr(names, ','))) {
352  len = FFMAX(p - names, namelen);
353  if (!av_strncasecmp(name, names, len))
354  return 1;
355  names = p + 1;
356  }
357  return !av_strcasecmp(name, names);
358 }
359 
360 int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
361  unsigned int flags)
362 {
363  const uint8_t *p = *bufp;
364  uint32_t top;
365  uint64_t code;
366  int ret = 0, tail_len;
367  uint32_t overlong_encoding_mins[6] = {
368  0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
369  };
370 
371  if (p >= buf_end)
372  return 0;
373 
374  code = *p++;
375 
376  /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
377  which is not admitted */
378  if ((code & 0xc0) == 0x80 || code >= 0xFE) {
379  ret = AVERROR(EILSEQ);
380  goto end;
381  }
382  top = (code & 128) >> 1;
383 
384  tail_len = 0;
385  while (code & top) {
386  int tmp;
387  tail_len++;
388  if (p >= buf_end) {
389  (*bufp) ++;
390  return AVERROR(EILSEQ); /* incomplete sequence */
391  }
392 
393  /* we assume the byte to be in the form 10xx-xxxx */
394  tmp = *p++ - 128; /* strip leading 1 */
395  if (tmp>>6) {
396  (*bufp) ++;
397  return AVERROR(EILSEQ);
398  }
399  code = (code<<6) + tmp;
400  top <<= 5;
401  }
402  code &= (top << 1) - 1;
403 
404  /* check for overlong encodings */
405  av_assert0(tail_len <= 5);
406  if (code < overlong_encoding_mins[tail_len]) {
407  ret = AVERROR(EILSEQ);
408  goto end;
409  }
410 
411  if (code >= 1<<31) {
412  ret = AVERROR(EILSEQ); /* out-of-range value */
413  goto end;
414  }
415 
416  *codep = code;
417 
418  if (code > 0x10FFFF &&
420  ret = AVERROR(EILSEQ);
421  if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
423  ret = AVERROR(EILSEQ);
424  if (code >= 0xD800 && code <= 0xDFFF &&
426  ret = AVERROR(EILSEQ);
427  if ((code == 0xFFFE || code == 0xFFFF) &&
429  ret = AVERROR(EILSEQ);
430 
431 end:
432  *bufp = p;
433  return ret;
434 }
435 
436 int av_match_list(const char *name, const char *list, char separator)
437 {
438  const char *p, *q;
439 
440  for (p = name; p && *p; ) {
441  for (q = list; q && *q; ) {
442  int k;
443  for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
444  if (k && (!p[k] || p[k] == separator))
445  return 1;
446  q = strchr(q, separator);
447  q += !!q;
448  }
449  p = strchr(p, separator);
450  p += !!p;
451  }
452 
453  return 0;
454 }
455 
456 #ifdef TEST
457 
458 int main(void)
459 {
460  int i;
461  char *fullpath;
462  static const char * const strings[] = {
463  "''",
464  "",
465  ":",
466  "\\",
467  "'",
468  " '' :",
469  " '' '' :",
470  "foo '' :",
471  "'foo'",
472  "foo ",
473  " ' foo ' ",
474  "foo\\",
475  "foo': blah:blah",
476  "foo\\: blah:blah",
477  "foo\'",
478  "'foo : ' :blahblah",
479  "\\ :blah",
480  " foo",
481  " foo ",
482  " foo \\ ",
483  "foo ':blah",
484  " foo bar : blahblah",
485  "\\f\\o\\o",
486  "'foo : \\ \\ ' : blahblah",
487  "'\\fo\\o:': blahblah",
488  "\\'fo\\o\\:': foo ' :blahblah"
489  };
490 
491  printf("Testing av_get_token()\n");
492  for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
493  const char *p = strings[i];
494  char *q;
495  printf("|%s|", p);
496  q = av_get_token(&p, ":");
497  printf(" -> |%s|", q);
498  printf(" + |%s|\n", p);
499  av_free(q);
500  }
501 
502  printf("Testing av_append_path_component()\n");
503  #define TEST_APPEND_PATH_COMPONENT(path, component, expected) \
504  fullpath = av_append_path_component((path), (component)); \
505  printf("%s = %s\n", fullpath, expected); \
506  av_free(fullpath);
507  TEST_APPEND_PATH_COMPONENT(NULL, NULL, "(null)")
508  TEST_APPEND_PATH_COMPONENT("path", NULL, "path");
509  TEST_APPEND_PATH_COMPONENT(NULL, "comp", "comp");
510  TEST_APPEND_PATH_COMPONENT("path", "comp", "path/comp");
511  TEST_APPEND_PATH_COMPONENT("path/", "comp", "path/comp");
512  TEST_APPEND_PATH_COMPONENT("path", "/comp", "path/comp");
513  TEST_APPEND_PATH_COMPONENT("path/", "/comp", "path/comp");
514  TEST_APPEND_PATH_COMPONENT("path/path2/", "/comp/comp2", "path/path2/comp/comp2");
515  return 0;
516 }
517 
518 #endif /* TEST */
#define NULL
Definition: coverity.c:32
int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.c:320
const char * s
Definition: avisynth_c.h:631
const char * fmt
Definition: avisynth_c.h:632
int av_escape(char **dst, const char *src, const char *special_chars, enum AVEscapeMode mode, int flags)
Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed ...
Definition: avstring.c:303
memory handling functions
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle...
Definition: avstring.c:56
#define vsnprintf
Definition: snprintf.h:36
const char * b
Definition: vf_curves.c:109
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
#define FF_ARRAY_ELEMS(a)
int av_isgraph(int c)
Locale-independent conversion of ASCII isgraph.
Definition: avstring.c:325
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
#define WHITESPACES
Definition: avstring.c:147
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int av_stristart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str independent of case.
Definition: avstring.c:45
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:234
uint8_t
#define av_malloc(s)
mode
Definition: f_perms.c:27
int av_isspace(int c)
Locale-independent conversion of ASCII isspace.
Definition: avstring.c:330
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
char * av_d2str(double d)
Convert a number to a av_malloced string.
Definition: avstring.c:139
#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES
accept codepoints over 0x10FFFF
Definition: avstring.h:331
static const uint64_t c1
Definition: murmur3.c:49
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_UTF8_FLAG_ACCEPT_SURROGATES
accept UTF-16 surrogates codes
Definition: avstring.h:333
static av_const int av_tolower(int c)
Locale-independent conversion of ASCII characters to lowercase.
Definition: avstring.h:231
#define AV_BPRINT_SIZE_UNLIMITED
#define s2
Definition: regdef.h:39
int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end, unsigned int flags)
Read and decode a single UTF-8 code point (character) from the buffer in *buf, and update *buf to poi...
Definition: avstring.c:360
#define AVERROR(e)
Definition: error.h:43
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
int av_match_list(const char *name, const char *list, char separator)
Check if a name is in a list.
Definition: avstring.c:436
simple assert() macros that are a bit more flexible than ISO C assert().
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
Definition: avstring.c:342
#define FFMAX(a, b)
Definition: common.h:64
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
Definition: avstring.c:149
return
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES
exclude control codes not accepted by XML
Definition: avstring.h:334
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
ret
Definition: avfilter.c:974
int32_t
int n
Definition: avisynth_c.h:547
static int av_bprint_is_complete(const AVBPrint *buf)
Test if the print buffer is complete (not truncated).
Definition: bprint.h:185
AVS_Value src
Definition: avisynth_c.h:482
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
void * buf
Definition: avisynth_c.h:553
static av_const int av_toupper(int c)
Locale-independent conversion of ASCII characters to uppercase.
Definition: avstring.h:221
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
#define s1
Definition: regdef.h:38
#define snprintf
Definition: snprintf.h:34
size_t av_strlcat(char *dst, const char *src, size_t size)
Append the string src to the string dst, but to a total length of no more than size - 1 bytes...
Definition: avstring.c:93
int av_isxdigit(int c)
Locale-independent conversion of ASCII isxdigit.
Definition: avstring.c:336
static int flags
Definition: cpu.c:47
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok()...
Definition: avstring.c:184
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
char * av_append_path_component(const char *path, const char *component)
Append path component to the existing path.
Definition: avstring.c:272
void av_bprint_escape(AVBPrint *dstbuf, const char *src, const char *special_chars, enum AVEscapeMode mode, int flags)
Escape the content in src and append it to dstbuf.
Definition: bprint.c:265
char * av_strnstr(const char *haystack, const char *needle, size_t hay_length)
Locate the first occurrence of the string needle in the string haystack where not more than hay_lengt...
Definition: avstring.c:69
common internal and external API header
static double c[64]
const char * av_dirname(char *path)
Thread safe dirname.
Definition: avstring.c:251
static const uint64_t c2
Definition: murmur3.c:50
#define av_free(p)
int len
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS
accept non-characters - 0xFFFE and 0xFFFF
Definition: avstring.h:332
AVEscapeMode
Definition: avstring.h:289
#define av_freep(p)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
int main(int argc, char **argv)
Definition: main.c:22
#define FFMAX3(a, b, c)
Definition: common.h:65
const char * name
Definition: opengl_enc.c:103