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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  uint8_t c1, c2;
226  if (n <= 0)
227  return 0;
228  do {
229  c1 = av_tolower(*a++);
230  c2 = av_tolower(*b++);
231  } while (--n && c1 && c1 == c2);
232  return c1 - c2;
233 }
234 
235 const char *av_basename(const char *path)
236 {
237  char *p = strrchr(path, '/');
238 
239 #if HAVE_DOS_PATHS
240  char *q = strrchr(path, '\\');
241  char *d = strchr(path, ':');
242 
243  p = FFMAX3(p, q, d);
244 #endif
245 
246  if (!p)
247  return path;
248 
249  return p + 1;
250 }
251 
252 const char *av_dirname(char *path)
253 {
254  char *p = strrchr(path, '/');
255 
256 #if HAVE_DOS_PATHS
257  char *q = strrchr(path, '\\');
258  char *d = strchr(path, ':');
259 
260  d = d ? d + 1 : d;
261 
262  p = FFMAX3(p, q, d);
263 #endif
264 
265  if (!p)
266  return ".";
267 
268  *p = '\0';
269 
270  return path;
271 }
272 
273 char *av_append_path_component(const char *path, const char *component)
274 {
275  size_t p_len, c_len;
276  char *fullpath;
277 
278  if (!path)
279  return av_strdup(component);
280  if (!component)
281  return av_strdup(path);
282 
283  p_len = strlen(path);
284  c_len = strlen(component);
285  if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2)
286  return NULL;
287  fullpath = av_malloc(p_len + c_len + 2);
288  if (fullpath) {
289  if (p_len) {
290  av_strlcpy(fullpath, path, p_len + 1);
291  if (c_len) {
292  if (fullpath[p_len - 1] != '/' && component[0] != '/')
293  fullpath[p_len++] = '/';
294  else if (fullpath[p_len - 1] == '/' && component[0] == '/')
295  p_len--;
296  }
297  }
298  av_strlcpy(&fullpath[p_len], component, c_len + 1);
299  fullpath[p_len + c_len] = 0;
300  }
301  return fullpath;
302 }
303 
304 int av_escape(char **dst, const char *src, const char *special_chars,
305  enum AVEscapeMode mode, int flags)
306 {
307  AVBPrint dstbuf;
308 
310  av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
311 
312  if (!av_bprint_is_complete(&dstbuf)) {
313  av_bprint_finalize(&dstbuf, NULL);
314  return AVERROR(ENOMEM);
315  } else {
316  av_bprint_finalize(&dstbuf, dst);
317  return dstbuf.len;
318  }
319 }
320 
321 int av_isdigit(int c)
322 {
323  return c >= '0' && c <= '9';
324 }
325 
326 int av_isgraph(int c)
327 {
328  return c > 32 && c < 127;
329 }
330 
331 int av_isspace(int c)
332 {
333  return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
334  c == '\v';
335 }
336 
337 int av_isxdigit(int c)
338 {
339  c = av_tolower(c);
340  return av_isdigit(c) || (c >= 'a' && c <= 'f');
341 }
342 
343 int av_match_name(const char *name, const char *names)
344 {
345  const char *p;
346  int len, namelen;
347 
348  if (!name || !names)
349  return 0;
350 
351  namelen = strlen(name);
352  while ((p = strchr(names, ','))) {
353  len = FFMAX(p - names, namelen);
354  if (!av_strncasecmp(name, names, len))
355  return 1;
356  names = p + 1;
357  }
358  return !av_strcasecmp(name, names);
359 }
360 
361 int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
362  unsigned int flags)
363 {
364  const uint8_t *p = *bufp;
365  uint32_t top;
366  uint64_t code;
367  int ret = 0, tail_len;
368  uint32_t overlong_encoding_mins[6] = {
369  0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
370  };
371 
372  if (p >= buf_end)
373  return 0;
374 
375  code = *p++;
376 
377  /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
378  which is not admitted */
379  if ((code & 0xc0) == 0x80 || code >= 0xFE) {
380  ret = AVERROR(EILSEQ);
381  goto end;
382  }
383  top = (code & 128) >> 1;
384 
385  tail_len = 0;
386  while (code & top) {
387  int tmp;
388  tail_len++;
389  if (p >= buf_end) {
390  (*bufp) ++;
391  return AVERROR(EILSEQ); /* incomplete sequence */
392  }
393 
394  /* we assume the byte to be in the form 10xx-xxxx */
395  tmp = *p++ - 128; /* strip leading 1 */
396  if (tmp>>6) {
397  (*bufp) ++;
398  return AVERROR(EILSEQ);
399  }
400  code = (code<<6) + tmp;
401  top <<= 5;
402  }
403  code &= (top << 1) - 1;
404 
405  /* check for overlong encodings */
406  av_assert0(tail_len <= 5);
407  if (code < overlong_encoding_mins[tail_len]) {
408  ret = AVERROR(EILSEQ);
409  goto end;
410  }
411 
412  if (code >= 1U<<31) {
413  ret = AVERROR(EILSEQ); /* out-of-range value */
414  goto end;
415  }
416 
417  *codep = code;
418 
419  if (code > 0x10FFFF &&
421  ret = AVERROR(EILSEQ);
422  if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
424  ret = AVERROR(EILSEQ);
425  if (code >= 0xD800 && code <= 0xDFFF &&
427  ret = AVERROR(EILSEQ);
428  if ((code == 0xFFFE || code == 0xFFFF) &&
430  ret = AVERROR(EILSEQ);
431 
432 end:
433  *bufp = p;
434  return ret;
435 }
436 
437 int av_match_list(const char *name, const char *list, char separator)
438 {
439  const char *p, *q;
440 
441  for (p = name; p && *p; ) {
442  for (q = list; q && *q; ) {
443  int k;
444  for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
445  if (k && (!p[k] || p[k] == separator))
446  return 1;
447  q = strchr(q, separator);
448  q += !!q;
449  }
450  p = strchr(p, separator);
451  p += !!p;
452  }
453 
454  return 0;
455 }
456 
457 #ifdef TEST
458 
459 int main(void)
460 {
461  int i;
462  char *fullpath;
463  static const char * const strings[] = {
464  "''",
465  "",
466  ":",
467  "\\",
468  "'",
469  " '' :",
470  " '' '' :",
471  "foo '' :",
472  "'foo'",
473  "foo ",
474  " ' foo ' ",
475  "foo\\",
476  "foo': blah:blah",
477  "foo\\: blah:blah",
478  "foo\'",
479  "'foo : ' :blahblah",
480  "\\ :blah",
481  " foo",
482  " foo ",
483  " foo \\ ",
484  "foo ':blah",
485  " foo bar : blahblah",
486  "\\f\\o\\o",
487  "'foo : \\ \\ ' : blahblah",
488  "'\\fo\\o:': blahblah",
489  "\\'fo\\o\\:': foo ' :blahblah"
490  };
491 
492  printf("Testing av_get_token()\n");
493  for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
494  const char *p = strings[i];
495  char *q;
496  printf("|%s|", p);
497  q = av_get_token(&p, ":");
498  printf(" -> |%s|", q);
499  printf(" + |%s|\n", p);
500  av_free(q);
501  }
502 
503  printf("Testing av_append_path_component()\n");
504  #define TEST_APPEND_PATH_COMPONENT(path, component, expected) \
505  fullpath = av_append_path_component((path), (component)); \
506  printf("%s = %s\n", fullpath ? fullpath : "(null)", expected); \
507  av_free(fullpath);
508  TEST_APPEND_PATH_COMPONENT(NULL, NULL, "(null)")
509  TEST_APPEND_PATH_COMPONENT("path", NULL, "path");
510  TEST_APPEND_PATH_COMPONENT(NULL, "comp", "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/", "/comp", "path/comp");
515  TEST_APPEND_PATH_COMPONENT("path/path2/", "/comp/comp2", "path/path2/comp/comp2");
516  return 0;
517 }
518 
519 #endif /* TEST */
#define NULL
Definition: coverity.c:32
int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.c:321
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:304
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
int av_isgraph(int c)
Locale-independent conversion of ASCII isgraph.
Definition: avstring.c:326
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:235
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:331
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
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
#define U(x)
Definition: vp56_arith.h:37
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:361
#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:437
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:343
#define FFMAX(a, b)
Definition: common.h:90
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
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
#define FF_ARRAY_ELEMS(a)
AVS_Value src
Definition: avisynth_c.h:482
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
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:337
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:273
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:252
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:91
const char * name
Definition: opengl_enc.c:103